Some standard content:
Machinery Industry Standards of the People's Republic of China
Brake
Theme content and scope of application
Terms
Tools
JB/T 6540--93||tt ||This standard specifies the general definitions of direct contact and non-direct contact brakes, the main components of the brake and its performance terms. This standard applies to direct contact and non-direct contact brakes. 2 General terms
2.1 Brake brake
A device with the function of decelerating, stopping or maintaining a stopped state of moving parts (or moving machinery). 2.2 Direct contact brake direct contact brake is a brake in which the braking parts are in direct contact with the moving parts (or moving machinery). 2.3 Non-direct contact brake Non-direct contact brake A brake in which the braking parts are not in direct contact with the moving parts (or moving machinery). 2.4 Friction brake friction brake
The brake component and the moving part (or moving machinery) form a friction pair. 2.5 Non-friction brake: Nan-frictionbrake is a brake in which the braking parts are not in direct contact with the moving parts (or moving machinery). 2.6 Normally disengaged brake is a brake that does not have a braking function when the driving part stops working. normally engaged brake
2.7 Normally closed brake
A brake with braking function when the driving component stops working. 2.8 One-way brake non-directional brake is a brake with braking function in only one direction of rotation. 2.9 Two-directional brake Two-directional brake A brake with braking function in both directions of rotation (left or right turn) 2.10F type brake dry brake
A brake that works under dry friction conditions. 2.11 Wet brake wet brake
A brake that works under wet friction conditions. 2.12 Hydraulically controlled brake is a brake that uses the action of liquid pressure to produce (or eliminates) the braking function. 2.13 Pneumatic brake pneumatically controlled brake uses the action of gas pressure to produce (or eliminates) the braking function. 2.14 Electromagnetic brake electromagnetic brake. The effect of electromagnetic force, the brake that generates (or eliminates) the braking function, 2.15 inertia brake inertia brake
Approved by the Ministry of Machinery Industry of the People's Republic of China on 1993-07-27 2
Implemented on 1994-07-01
JB/T 6540—-93
A brake that uses the action of inertial force to generate (or eliminate) the braking function. 2.16 Gravity brake gravity brake
A brake that uses the action of gravity to produce (or eliminate) the braking function. 2.17 Centrifugal brake centrifugal brake uses the action of centrifugal force to produce (or eliminate) the braking function. 2.18 Mechanically controlled brake: A brake that produces (or eliminates) the braking function with the help of a mechanical mechanism. 2.19 Manual brake
A brake that generates (or eliminates) the braking function with the help of human power. 2.20 Self-locking brake: A brake that uses the weight of moving parts (or moving machinery) to generate (or eliminate) the braking function. 2.21 Jaw brake jaw brake
The brake part is in direct contact with the moving part (or moving machinery) to form a fitting pair. 2.22 Drum brake drum brake
A brake that uses a cylindrical surface as the contact surface of the friction pair. 2.23 Band brake band brake
A brake that uses the inner surface of the brake band as the friction pair contact surface. 2.24 Disc brake disk brake
A brake that uses the end surface of the disc as the contact surface of the friction pair. 2.25 Cone brake
conebrake
A brake that uses the cone side as the contact surface of the friction pair. 2.26 block brake block brake
A brake that uses the inner cylindrical surface of the brake shoe assembly as the contact surface of the friction pair. Synonyms: brake block brake, brake shoe brake, brake pad brake. 2.27 External-contacting brake: The inner surface of the braking component and the outer surface of the moving part (or moving machinery) form a friction pair. Synonyms: holding brake.
2.28 Internal-expanding brake The outer surface of the braking component and the inner surface of the moving part (or moving machinery) form a friction pair. Synonyms: rising brake.
2.29 wedge brake wedgebrake
A brake that uses a wedge to cause the braking component to contact (or separate) from the moving component (or moving machinery) to generate (or eliminate) the braking function. 2.30 Cam brake cam brakc
A brake that uses a cam to force the braking component to contact (or separate) from the moving parts (or moving machinery) to generate (or eliminate) the braking function, 2.31 plunger brake whecl cylinder brake column The plug forces the braking part to contact (or separate) from the moving part (or moving machinery), producing (or eliminating) the braking function of the brake. 2.32 Pushrod brake pushrod brake
A brake that uses a spreader rod component to force the braking component to separate (or come into contact) with the moving part (or moving machinery) and eliminate (or generate) the braking function.
2.33. One shoe brake is an internal tension brake with only one brake shoe. 2.34 Double shoe brake
twa shoe brake
Inner tension brake with symmetrically distributed brake shoes 12:
2.35 leading shoe brake leading shoe brake brake shoe is Leading shoe drum brake
2.36 Trailing shoe brake The braku brake shoe is a drum brake from the trailing shoe.
JB/T 6540-93
2.37 pneumatic tube brake is a drum brake with pneumatic tube components as braking components. Synonyms: hose brake.
2.38 Magnetic particle brake: The braking component and the moving part are braked by the friction between the magnetic powder chain formed by the electromagnetic attraction between the magnetic particles and the working surface to generate the braking function.
2.39 Electromagnetic whirlpool brake electromagnetic whirlpool brake is a brake that has braking function for braking parts and moving parts by virtue of the eddy current generated by electromagnetic induction. 2.40 Hysteresis brake magnetic remanence brake Brake parts and moving parts have a braking function with the help of hysteresis 2.41 Water vortex brake water whirlpool brake Braking parts and moving parts have a braking function with the help of water vortex of brakes. 2.42 Safety brake safety brake
A brake that has the function of braking the moving parts (or moving machinery) when the torque or speed transmitted by the moving parts (or moving machinery) exceeds a certain limit value.
3 Main component terms
3.1 Braking part
In direct contact brakes, they are in direct contact with moving parts (or moving machinery) to form a friction pair or fitting pair In non-direct contact brakes, moving parts are braked by the action of magnetic powder, electromagnetic eddy current, hysteresis and water eddy current. 3.2 Driving part driving par
A component that can not only control the movement of the braking component, but also exert (or eliminate) force on the braking component 3.3 Base component bage part
Install the braking component and drive Base components for parts and other components. 3.4 Clearance adjusting part: A component with the function of adjusting the gap between braking parts and moving parts (or moving machinery). 3.5 Alarm part alarm part
A component that can send out an alarm signal when some 1. operating conditions of the braking component or the driving component reach critical working conditions. 3.6 Protection part protection part
A component that can still ensure that the brake continues to work when a certain part of the braking component or driving component fails. 3.7 Brake lining brake lining
The outer cylindrical surface is used as the friction working surface and is a part made of friction material. Synonyms: friction plate.
3.8 Brake shoe brake shoe
The outer cylindrical surface can be made into an integral part with the brake lining or friction material. 3.9 Brake shoe assembly brake shoe assembly is a component composed of brake shoes and brake discs. 3.10 The brake drum brakcdrum
uses the inner cylindrical surface as the friction working surface and forms a friction pair with the brake shoe assembly. 1 2.1
3.11 brake disk brake disk
JB/T 6540- 93
A disc-shaped moving part with the end plane as the friction working surface. 3.12 The brake caliper is a brake pincers part. The two inner sides of the caliper are equipped with friction blocks, and the end surface of the brake disc between them forms the friction brush component. 3.13 Brake caliper plate arm brake caliper plate yoke is a component that directly applies the force of the driving component to the friction pair composed of the brake caliper component and the brake disc. 3.14 brake armbrake arm
In external brake, the force of the driving component is directly applied to the components on the contact surface between the braking component and the moving part (or moving machinery).
3.15 brake pad brake pad
A part made of friction material using the inner cylindrical surface as the friction working surface. 3. 16 Shots of brakes
The parts connected with the brake arm + the brake pad can be installed on the inner cylindrical surface. 3. 17 Brake shoe assembly shoes assembiy of brakcs is a component composed of brake accessories and brake pads. 3.18 The main spring part is the spring part that returns the brake arm to the starting position. 3.19 pushrod part pushrod part
The mechanical component that causes the brake arm to move and maintain it in a specified position. 3.20 brake wheel brakc wheel
The external cylindrical surface is the upper friction surface, and it forms a friction pair with the brake band. 3.21 Brake steel
No.-end is fixed on the lever component with an adjustable connection, and friction lining parts can be installed on the inner side. One end is fixed on the base component, and the other
3.22 brake lining brake lining
is installed on the inner side of the brake steel belt, a strip-shaped part made of friction material. 3.23 Brake belt brake belt
is a component composed of brake steel belt and friction lining belt. 3.24 Lever part lever part
A planar mechanism component that causes the brake band to move and maintain it in a specified position. 3.25 The leading shoe leading shoe
When the brake shoe assembly is opened, the rotation direction is the same as the brake drum rotation direction. Synonyms: tight hoof.
3.26 trailing shoe
The rotation direction of the brake shoe assembly when it is opened is opposite to the rotation direction of the brake drum. Synonyms: loose hoof.
3.27 peumatic tube
The outer cylinder can fix the friction block, and it is an annular sealed air bag made of rubber and special cord that is elastic and can withstand torque. Synonyms: hose.
3.28 brake block brake piece
is installed on the outer cylindrical surface of the pneumatic tire (or installed in the brake caliper component), and is a block part made of Sichuan friction material. 3.29 The inner cone plate component has a friction material fixed on the outer surface of the metal truncated cone and forms a friction component with the inner surface of the outer cone plate. 3.30 External cone plate cxternal cone plateJB/T6540
93
The inner surface of the metal truncated cone and the outer surface of the inner cone plate component form a friction pair. 4 Performance terms
4.1 Braking force F (N) braking force The force generated between the braking component and the moving component (or moving machinery) that directly forces the moving machinery to decelerate and stop. 4.2 Braking torque T' (N·m) braking torque is the torque generated between braking components and moving parts (or moving machinery) that directly causes the moving machinery to decelerate and stop. Tr-FR
The total force of the braking force, N;
Where: F-----
R--The distance from the action point of the total force to the center of the axis of the moving machine , m. 4.3 Acting force F, (N) application lorce The total force exerted by the driving component on the braking component. 4.4 Load torque T (N·m) loadtoroue is the total energy possessed by the moving parts (or moving machinery) during braking, converted to the torque on the braking shaft. 4.5 Total equivalent fly-wheel torque GD2, total eguivalent fly-wheel torque is the sum of the flywheel torques of all braked parts of moving parts (or moving machinery), converted to the flywheel torque on the braking shaft. 4.6 Horizontal braking level braking
only brakes the inertial mass of moving parts (or moving machinery). 4.7 Vertical braking
The moving machinery is braked by inertial mass and vertical load, and mainly vertical load. 4.8 Brake hysteresis brakehysteresis corresponds to a certain same braking torque during the process of applying the brake and releasing the brake. The difference between the two forces is shown in Figure 1. ·
The difference AF of the braking force.
Excitation current#
Action force, N
Figure 1
4.9 Brake reaction time t (s)
reartion time of brake||tt| |The time elapsed from when the driving component starts to act to when the braking component starts to generate (or eliminate) braking torque. 4.10 Effective working time t. (s) activeworking time is the elapsed time in a normally open brake from when the braking torque begins to occur to when the braking torque disappears (if the moving machine stops before the braking torque disappears, it will be when the moving machine stops) Time
In a normally closed brake, the time elapses from when the stable braking torque starts to decrease until the braking torque returns to the stable braking torque. Synonyms: effective braking time.
4.11 Total working time t(s) total working time The sum of brake reaction time and effective working time. Synonym: total braking time.
2T operating time t, (s) main working tine4.12
JB/T6540—-93
The time during which the braking torque basically maintains a certain stable value in a normally open brake . In a normally closed brake, the time when the braking torque is equal to zero. 4.13 Relaxation time t (s) releasetime In a normally open brake, the time elapsed after the driving component stops working until the braking torque equals zero. In a normally closed brake, the time elapsed from when the drive component starts working until the braking torque equals zero. 4.14 Braking torque increment time tb(s) incrcasing time of brake torque is the time that elapses until the braking torque reaches a certain stable value. See Figure 2 and Figure 3.
Total operating time
Effective working time t:
t.
Brake braking torque
Reaction time growth time
Brake relaxation Time
reaction time
.ET operating time
relaxation time
Figure 2 Schematic diagram of the working process of the normally open brake
Total.I. Operating time 1| |tt||Effective working time t
1. Working time
Time!
Zhongshan time
Time?
Brake braking force
Reaction time growth time
Figure 3 Schematic diagram of the working process of the normally closed brake
4.15 Effective braking distance S (m) active braking distance is the distance traveled by moving parts (or moving machinery) during effective working hours. 4.16 Total braking distance S + (m) total braking distance is the distance traveled by moving parts (or moving machinery) during the total working time. 4.17 Unit friction work E (J/cm) utit friction work friction brush during the braking process, unit The friction work produced on the apparent area. Synonyms: braking power, sliding power.
JB/T6540-93
4.18 unit friction power A (W/cm\)
unit friction power
During the braking process, the unit installation value of the friction pair The friction work produced by the area per unit time. Synonyms: braking power, slipping power. 4.19 Allowable friction work [E] (J/cm2) allowablefriction work The maximum unit friction work allowed by the friction pair during braking. Synonyms: Braking power is allowed, sliding friction power is allowed. 4.20 Allowable friction power [AJ (W/cm\) allowable friction power: During the braking process, the maximum unit friction power allowed by the friction pair. Synonyms: allowable braking power, allowable slipping power. 4.21 Braking frequency f (Hz) braking frequency is the number of braking times per unit time.
4.22 braking rotational speed m, (r/min) braking rotational speed, the rotational speed of moving parts (or moving machinery) when braking starts. 4.23 Braking deceleration α (m/s2) braking deceleration is the deceleration obtained by moving parts (or moving machinery) within a certain period of time due to the action of braking components. 4.24 Average braking deceleration um (m/s) \) The difference between the two instantaneous speeds during bean braking deccleration braking, and the ratio of the time interval between the two instantaneous speeds, 4.25 wear rate K (cm2/J) wcar Iate friction pair does not produce burns, the maximum value under unit friction work Amount of wear (single side). 4.26 heat load value! Thermic load value During the braking process, heat is continuously generated. The amount of heat can be expressed by the unit friction work and unit friction power curves. The product of unit friction work and unit friction power is called the thermal load value. G=EA
4.27 allowable thermal load value [q] allowable thermal load value ensures that the brake will not burn, the maximum allowable thermal load value, 4.28 number of braking pairs effective contact pairs during the braking process number.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the phenomenon of reduced braking effect. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
17 Unit friction work E (J/cm) utit friction work The friction work generated by the friction brush per unit surface area during the braking process. Synonyms: braking power, sliding power.
JB/T6540-93
4.18 unit friction power A (W/cm\)
unit friction power
During the braking process, the unit installation value of the friction pair The friction work produced by the area per unit time. Synonyms: braking power, slipping power. 4.19 Allowable friction work [E] (J/cm2) allowablefriction work The maximum unit friction work allowed by the friction pair during braking. Synonyms: Braking power is allowed, sliding friction power is allowed. 4.20 Allowable friction power [AJ (W/cm\) allowable friction power: During the braking process, the maximum unit friction power allowed by the friction pair. Synonyms: allowable braking power, allowable slipping power. 4.21 Braking frequency f (Hz) braking frequency is the number of braking times per unit time.
4.22 braking rotational speed m, (r/min) braking rotational speed, the rotational speed of moving parts (or moving machinery) when braking starts. 4.23 Braking deceleration α (m/s2) braking deceleration is the deceleration obtained by moving parts (or moving machinery) within a certain period of time due to the action of braking components. 4.24 Average braking deceleration um (m/s) \) The difference between the two instantaneous speeds during the braking process of bean braking deccleration, and the ratio of the time interval between the two instantaneous speeds, 4.25 wear rate K (cm2/J) wcar Iate friction pair does not produce burns, the maximum value under unit friction work Amount of wear (single side). 4.26 heat load value! Thermic load value During the braking process, heat is continuously generated. The amount of heat can be expressed by the unit friction work and unit friction power curves. The product of unit friction work and unit friction power is called the thermal load value. G=EA
4.27 allowable thermal load value [q] allowable thermal load value ensures that the brake will not burn, the maximum allowable thermal load value, 4.28 number of braking pairs effective contact pairs during the braking process number.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the braking effect decreases. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area A (cm2) of the brake lining is calculated by ignoring the grooves on the surface of the brake lining, etc. The calculated single-sided surface area. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
17 Unit friction work E (J/cm) utit friction work The friction work generated by the friction brush per unit surface area during the braking process. Synonyms: braking power, sliding power.
JB/T6540-93
4.18 unit friction power A (W/cm\)
unit friction power
During the braking process, the unit installation value of the friction pair The friction work produced by the area per unit time. Synonyms: braking power, slipping power. 4.19 Allowable friction work [E] (J/cm2) allowablefriction work The maximum unit friction work allowed by the friction pair during braking. Synonyms: Braking power is allowed, sliding friction power is allowed. 4.20 Allowable friction power [AJ (W/cm\) allowable friction power: During the braking process, the maximum unit friction power allowed by the friction pair. Synonyms: allowable braking power, allowable slipping power. 4.21 Braking frequency f (Hz) braking frequency is the number of braking times per unit time.
4.22 braking rotational speed m, (r/min) braking rotational speed, the rotational speed of moving parts (or moving machinery) when braking begins. 4.23 Braking deceleration α (m/s2) braking deceleration is the deceleration obtained by moving parts (or moving machinery) within a certain period of time due to the action of braking components. 4.24 Average braking deceleration um (m/s) \) The difference between the two instantaneous speeds during the braking process of bean braking deccleration, and the ratio of the time interval between the two instantaneous speeds, 4.25 wear rate K (cm2/J) wcar Iate friction pair does not produce burns, the maximum value under unit friction work Amount of wear (single side). 4.26 heat load value! Thermic load value During the braking process, heat is continuously generated. The amount of heat can be expressed by the unit friction work and unit friction power curves. The product of unit friction work and unit friction power is called the thermal load value. G=EA
4.27 allowable thermal load value [q] allowable thermal load value ensures that the brake will not burn, the maximum allowable thermal load value, 4.28 number of braking pairs effective contact pairs during the braking process number.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the phenomenon of reduced braking effect. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
20 Allowable friction power [AJ (W/cm\) allowable friction power During the braking process, the maximum unit friction power allowed by the friction pair. Synonyms: allowable braking power, allowable slipping power. 4.21 Braking frequency f (Hz) braking frequency is the number of braking times per unit time.
4.22 braking rotational speed m, (r/min) braking rotational speed, the rotational speed of moving parts (or moving machinery) when braking starts. 4.23 Braking deceleration α (m/s2) braking deceleration is the deceleration obtained by moving parts (or moving machinery) within a certain period of time due to the action of braking components. 4.24 Average braking deceleration um (m/s) \) The difference between the two instantaneous speeds during the braking process of bean braking deccleration, and the ratio of the time interval between the two instantaneous speeds, 4.25 wear rate K (cm2/J) wcar Iate friction pair does not produce burns, the maximum value under unit friction work Amount of wear (single side). 4.26 heat load value! Thermic load value During the braking process, heat is continuously generated. The amount of heat can be expressed by the unit friction work and unit friction power curves. The product of unit friction work and unit friction power is called the thermal load value. G=EA
4.27 allowable thermal load value [q] allowable thermal load value ensures that the brake will not burn, the maximum allowable thermal load value, 4.28 number of braking pairs effective contact pairs during the braking process number.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the phenomenon of reduced braking effect. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake Chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of the brake pad, allowable pressure of the friction lining, allowable pressure of the friction block. 4.51 Braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
20 Allowable friction power [AJ (W/cm\) allowable friction power During the braking process, the maximum unit friction power allowed by the friction pair. Synonyms: allowable braking power, allowable slipping power. 4.21 Braking frequency f (Hz) braking frequency is the number of braking times per unit time.
4.22 braking rotational speed m, (r/min) braking rotational speed, the rotational speed of moving parts (or moving machinery) when braking starts. 4.23 Braking deceleration α (m/s2) braking deceleration is the deceleration obtained by moving parts (or moving machinery) within a certain period of time due to the action of braking components. 4.24 Average braking deceleration um (m/s) \) The difference between the two instantaneous speeds during bean braking deccleration braking, and the ratio of the time interval between the two instantaneous speeds, 4.25 wear rate K (cm2/J) wcar Iate friction pair does not produce burns, the maximum value under unit friction work Amount of wear (single side). 4.26 heat load value! Thermic load value During the braking process, heat is continuously generated. The amount of heat can be expressed by the unit friction work and unit friction power curves. The product of unit friction work and unit friction power is called the thermal load value. G=EA
4.27 allowable thermal load value [q] allowable thermal load value ensures that the brake will not burn, the maximum allowable thermal load value, 4.28 number of braking pairs effective contact pairs during the braking process number.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the phenomenon of reduced braking effect. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking dragbzxz.net
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
28 Number of braking pairs The number of effective contact pairs during the braking process.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the braking effect decreases. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
28 Number of braking pairs The number of effective contact pairs during the braking process.
4.29 heat fade
The phenomenon of attenuation of braking effect due to the influence of brake friction heat during the braking process 4.30 degeneration
In dry brakes, the friction surface is oily (or water) the braking effect decreases. 4.31 Recovery rr:cupcration
The braking effect is restored after the thermal decay and oil (or water) decay disappear. 4.32 Over recovery
over recovery
After the phenomenon of thermal recession and oil (or water) recession disappears, the braking effect is higher than before the recession. 4.33 Enhance build up
During the braking process, the brake effect is enhanced before the moving parts (or moving machinery) are about to stop moving. 4.34 Heat cracks
The heat generated during the braking process causes cracks on the contact surface between the braking parts and the moving parts (or moving machinery). 4.35 Braking part swell: After the brake is used for a period of time, the thickness of the friction material in the braking part increases. 4.36 Braking drag
28
JB/T 6540—93
Slight braking phenomenon during non-braking action caused by incomplete brake relaxation or swelling of the brake components. brake chatter
4.37 Brake chatter
During the braking process, the brake vibrates with small amplitude. 4.38 Brake noise
brake noise
The noise generated by the brake during the braking process. 4.39 Braking hop
During the braking process, the phenomenon of moving machinery (or moving parts) jumping, 4.40 Braking failure braking failurc
During the braking process, due to some parts of the brake Damage or malfunction prevents moving parts (or moving machinery) from remaining stopped.
4.41 braking safety coefficient β braking safely coefficient The multiple of the braking torque greater than the load torque. B=T/T
2 brake efficiencynbrake efficiency4.42
The ratio of the braking forces.
7=/F
3 brake shoe retract distance ε (mm)
4.43
retract distance of brake shoe between brake shoe and brake shaft Radial gap. Nominal area of ??brake lining4.44 The nominal area of ??the brake lining A (cm2) ignores the single-sided surface area calculated by ignoring the grooves on the surface of the brake lining. Synonyms: nominal area of ??brake pad, nominal area of ??friction lining, nominal area of ??friction pad. apparent area of ??brake lining4.45 The apparent area of ??the brake lining A (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area of ??the brake lining surface. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
45 The apparent area A of the brake lining (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area on the surface of the brake lining. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
45 The apparent area A of the brake lining (cm2) is the single-sided surface area of ??the brake lining after deducting the groove area on the surface of the brake lining. Synonyms: apparent area of ??the brake pad, apparent area of ??the friction lining, apparent area of ??the friction pad 4.46 Actual contact area of ??the brake lining A. (cm) Actual contact single-sided surface area of ??the brake lining. real contact area of ??brake lining synonyms: the actual contact area of ??the brake pad, the actual contact area of ??the friction lining, the actual contact area of ??the friction pad. 4.47 Nominal specific pressure of brake lining Ph (MPa) nominal specific pressure of brake lining Surface unit pressure calculated according to the nominal area of ??the brake lining Synonyms: nominal pressure of the brake pad, nominal pressure of the friction lining, friction block The nominal pressure is 4.48. The apparent repulsion of the brake lining P (MPa) apparcnt specific prcssure of brakc: lining is the surface unit pressure calculated based on the apparent area of ??the brake lining. Synonyms: apparent pressure of the brake pad, apparent pressure of the friction lining, apparent pressure of the friction pad. 4.49 Real specific pressure of brake lining P, (MPa) real specific pressure of brake lining is the surface unit pressure calculated based on the actual contact area of ??the brake lining. Synonyms: actual pressure of the brake pad, actual pressure of the friction lining, actual pressure of the friction pad 4.50 allowable pressure of the brake tree [PF (MPa) mpa allowalbe specific pressurc of brakc lining maximum allowable table of brake linings Watch the pressure. Synonyms: allowable pressure of brake pad, allowable pressure of friction lining, allowable pressure of friction block. 4.51 braking rate braking rate
The ratio of the deceleration of moving parts (or moving machinery) to the acceleration of gravity. [29 | This standard was drafted by the No. 71 Research Institute of China State Shipbuilding Corporation and the Machinery Standardization Institute of the Ministry of Machinery Industry
The main drafters of this standard are Zhang Yifei, Zhou Mingheng, and Wei Xuzhen. 1.3
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