Some standard content:
Machinery Industry Standard of the People's Republic of China
QPL type pneumatic disc clutch
Subject content and scope of application
JB/T70059
93
This standard stipulates Type, size, technical requirements, test methods, inspection rules, marking and packaging of QPI. type pneumatic disc clutch (hereinafter referred to as clutch).
This standard is applicable to clutches with a transmission torque of 520~~82000N·m and an allowable speed of 1800~~500r/min. 2 Reference standards
Determination of tensile properties of vulcanized rubber||tt ||GB528
GB531
GB532
GB1039
GB1040
GB1041
GB1042
GB1922
GB3512
GB 4879
GB5763
GB5765
GB6414
GB7284
Rubber Shore A type hardness test method
Determination of the adhesive strength of vulcanized rubber and fabric General principles for testing methods for mechanical properties of plastics
Tensile test method for plastics
Compression test method for plastics
Bending test method for plastics
Solvent oil|| tt||Rubber hot air aging test method
Anti-rust packaging
Automotive brake linings
Method for determination of impact strength of friction materials
Dimensional tolerance of castings||tt| |Frame wooden box
JB/ZQ4000.2 General technical conditions for cutting parts JB/ZQ4000.10 General technical conditions for painting 3 Type, size and basic parameters
3.1 The type of clutch is shown in Figure 1.
3.1 The basic parameters and dimensions of the clutch should comply with the provisions of Table 1. Ministry of Machinery Industry of the People's Republic of China approved on 1993-09-03 and implemented on 1994-07-01
117
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JB/T700593
06
8
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JB/T7005--93
906
039
998
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3.3 model and its meaning:||tt ||Marking example:
Clutch with rated torque of 4160N·m: QPL5 clutch JB/T7005--93
4 technical requirements
4.1 complete machine
JB /T7005
5—93
Xx
Clutch specification code
Clutch
Disc
Pneumatic
4.1. 1. The shell and end cover should be surface rust removed and painted according to the regulations of JB/ZQ4000.10. The paint color shall be manufactured by! Sure. 4.1.2 Before assembly, foreign matter everywhere should be removed, and the quick exhaust valve should be cleaned with NY-190 solvent oil in GB1922. 4.1.3 The contact area between each friction disk and the inner disk shall not be less than 85%. 4.2 Friction disc
4.2.1 The friction plane of the friction disc should not have defects such as bubbles, cracks, delamination, obvious impurities, and processing damage. 4.2.2
Geometry tolerances shall comply with the provisions of GB1184: a.
4.2.3
a,
b.
c.|| tt||d.
e.
f.
The parallelism of the two friction surfaces of the friction disc is grade 7; the perpendicularity of the two friction surfaces to the axis is grade 6. The material of the friction disc should have the following properties: The wear performance of the friction disc should comply with the provisions of Table 2: Table 2
item
8
static friction coefficient \
wear Rate
10-7cm2/
Bending strength is not less than 49N/mm;
Tensile strength is not less than 19.6N/mm2;
Compressive strength is not less than 49N/ mm;
impact strength is not less than 0.49/cm2:
hardness 25~35HB.
4.3
Air bag
4.3.1
a.
b.
c.
d.|| tt||e.
4.3.2
100℃
150℃
200℃
The air bag is made of rubber, and its performance should meet the following requirements: tearing strength: the inner rubber layer is not less than 19N/ mm; the outer rubber layer is not less than ?15N/mm2. Elongation at break: inner and outer rubber layers are 400%~430%. Refers to
Standard
0.35*0
0.17
0.25
Hot air aging test: after 24h at 100C temperature, the performance reduction shall not be greater than 30% . Permanent deformation at breakage: both inner and outer rubber layers are no more than 25%. Type A hardness: outer rubber layer is 60±5; inner rubber layer is 45±5. The reinforcement layer is made of nylon cord.
120
4.3.3 Adhesion strength
JB/T7005--93
Between each adhesive layer and the reinforcement layer and between the reinforcement layer and the reinforcement layer should not be low At 27N/cm2. The friction between the rubber compound and the joint shall not be less than 200N/cm2. 4.4 Inner disc
4.4. The mechanical properties of the inner disc material shall not be lower than HT250, and the casting tolerance shall comply with the CT12 level of GB6414. 4.4.2 The mechanical processing of the inner disk should comply with the regulations of JB/ZQ4000.2. 4.5 Spare parts replacement time
4.5.1 The return spring and air bag should be replaced after 10° of clutch contact. 4.5.2 When the semicircular gasket (No. 9 in the figure) is removed and the torque still cannot reach the dynamic value in Table 1, all friction discs should be replaced. 5 Test methods
5.1 Air bag
5.1.1 The tearing strength and tearing elongation of the inner and outer rubber layers are in accordance with GB528. 5.1.2 The hardness of the inner and outer rubber layers (Juner Type A) shall be in accordance with GB531. 5.1.3 The adhesion strength between the inner and outer rubber and the cord fabric shall be in accordance with GB532. 5.1.4 The hot air aging test of the inner and outer rubber layers shall be in accordance with GB3512. 5.1.5 The airbag should undergo a hydrostatic pressure test with a pressure of 0.9MPa and a pressure holding time of 5 minutes. During the pressure holding time, there should be no water seepage, peripheral bulges or other abnormal phenomena.
5.2 Friction DiscWww.bzxZ.net
5.2.1 Use visual inspection for cracks, warpage, impurities, distortion and other items, and use knocking to check for blistering. 5.2.2 Impact strength is in accordance with GB5765. 5.2.3 The compressive strength shall be in accordance with the provisions of GB1041, and the preparation and appearance inspection of the specimen shall be in accordance with the provisions of Chapter 1 and Chapter 2 of GB1039. 5.2.4 Tensile strength shall comply with the provisions of GB1040. 5.2.5 Bending strength shall comply with the provisions of GB1042. 5.2.6 Friction performance
5.2.6.1 Adjust the air pressure to 0.1MPa, adjust the moment of inertia of the driven part to a fixed value, and rotate at a speed of 3m/s (middle part of the friction pair), and keep clutching for a certain period of time , so that the contact area of ??each friction disk is no less than 85%, disassemble the clutch, measure the thickness of the friction disk every 90° in the middle, and find the average thickness of the friction disk. 5.2.6.2 Adjust the rotational inertia, inner disk speed and air pressure to a certain value, and continuously clutch 50,000 times at a frequency of 15 times per minute. During the continuous clutching process, the dynamic temperature of the friction pair shall not exceed 150C. Disassemble the clutch and measure the thickness of the middle part of the friction plate. Multiply the difference between the measured thickness and the thickness measured in 5.2.6.1 by the friction area of ??the friction disk to calculate the wear amount. Then based on the moment of inertia during the test and the angular acceleration of the inner disk, calculate the wear rate. The value shall not be greater than the value shown in the table. 2 regulations. 5.2.6.3 Under normal temperature conditions (below 100°C), adjust the inner disk speed to a certain value, and then adjust the air pressure and moment of inertia to a certain value from small to large (not the maximum value, but the air pressure should be adjusted to 0.5 MPa), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque at various air pressures and moments of inertia.
5.2.6.4 Under normal temperature conditions (below 100°C), adjust the air pressure to a certain value, and then adjust the moment of inertia and inner disk speed to a certain value from small to large (not the maximum value) ), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque under various moments of inertia and inner disk speed.
5.2.6.5 Adjust the moment of inertia and inner disk speed to a certain value, with a clutch rate of 25 times per minute, and when the air pressure is equal to 0.5MPa, continue clutching until the equilibrium temperature, and measure the following items: a. Balance Temperature:
b, starting from normal temperature, the static friction coefficient at every 20C. Calculation of static friction coefficient:
121
where: T—actually measured clutch transmission torque, N·mQ—axial pressing force, N;
n—- —-Number of friction pairs;
Rr effective friction radius, m.
Wuzhong: R----Outer radius of friction pair.m
·Inner radius of friction pair, m.
6 inspection rules
JB/T 7005-—93
,
Rr
T
nQR| |tt||.R3
2
It can only be released after it has passed the required inspection and is accompanied by a product quality certificate."
6.2 Before each clutch leaves the factory, the manufacturer shall conduct factory testing in accordance with the provisions of Article 5.2.6.1. 6.3 New clutches put into production and when the formula of the friction material is changed, shall be tested in accordance with the provisions of Article 5.2. If the inspection results are unqualified, they shall not be shipped out of the factory
6.4 Before conducting the test in Article 6.3, the clutches in the batch shall be Extract two clutches, test one on the other and conduct dimensional inspection on the other. 7 Marking and packaging
The anti-rust packaging of the clutch is in accordance with the regulations of GB4879. 7.11
7.2 The clutch after rust-proof packaging shall be packed in a frame wooden box in accordance with the provisions of GB7284. 7.3 The mark should include the following content:
a.
h.
c.
d.
Manufacturer name;
Product Name and model specifications;
Manufacturing date;
Weight.
Additional notes:
This standard is proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Xi'an Heavy Machinery Research Institute. The main drafters of this standard are Li Shuoci and Li Weidong. 122
4. Tensile strength is in accordance with GB1040. 5.2.5 Bending strength shall comply with the provisions of GB1042. 5.2.6 Friction performance
5.2.6.1 Adjust the air pressure to 0.1MPa, adjust the moment of inertia of the driven part to a fixed value, and rotate at a speed of 3m/s (middle part of the friction pair), and keep clutching for a certain period of time , so that the contact area of ??each friction disk is no less than 85%, disassemble the clutch, measure the thickness of the friction disk every 90° in the middle, and find the average thickness of the friction disk. 5.2.6.2 Adjust the rotational inertia, inner disk speed and air pressure to a certain value, and continuously clutch 50,000 times at a frequency of 15 times per minute. During the continuous clutching process, the dynamic temperature of the friction pair shall not exceed 150C. Disassemble the clutch and measure the thickness of the middle part of the friction plate. Multiply the difference between the measured thickness and the thickness measured in 5.2.6.1 by the friction area of ??the friction disk to calculate the wear amount. Then based on the moment of inertia during the test and the angular acceleration of the inner disk, calculate the wear rate. The value shall not be greater than the value shown in the table. 2 regulations. 5.2.6.3 Under normal temperature conditions (below 100°C), adjust the inner disk speed to a certain value, and then adjust the air pressure and moment of inertia to a certain value from small to large (not the maximum value, but the air pressure should be adjusted to 0.5 MPa), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque at various air pressures and moments of inertia.
5.2.6.4 Under normal temperature conditions (below 100°C), adjust the air pressure to a certain value, and then adjust the moment of inertia and inner disk speed to a certain value from small to large (not the maximum value) ), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque under various moments of inertia and inner disk speed.
5.2.6.5 Adjust the moment of inertia and inner disk speed to a certain value, with a clutch rate of 25 times per minute, and when the air pressure is equal to 0.5MPa, continue clutching until the equilibrium temperature, and measure the following items: a. Balance Temperature:
b, starting from normal temperature, the static friction coefficient at every 20C. Calculation of static friction coefficient:
121
where: T—actually measured clutch transmission torque, N·mQ—axial pressing force, N;
n—- —-Number of friction pairs;
Rr effective friction radius, m.
Wuzhong: R----Outer radius of friction pair.m
·Inner radius of friction pair, m.
6 inspection rules
JB/T 7005-—93
,
Rr
T
nQR| |tt||.R3
2
It can only be released after it has passed the required inspection and is accompanied by a product quality certificate."
6.2 Before each clutch leaves the factory, the manufacturer shall conduct factory testing in accordance with the provisions of Article 5.2.6.1. 6.3 Newly produced clutches and when the formula of the friction material is changed, shall be tested in accordance with the provisions of Article 5.2. If the inspection results are unqualified, they shall not be shipped
6.4 Before conducting the test of Article 6.3, the clutches in the batch shall be Extract two clutches, test one on the other and conduct dimensional inspection on the other. 7 Marking and packaging
The anti-rust packaging of the clutch is in accordance with the regulations of GB4879. 7.11
7.2 The clutch after rust-proof packaging shall be packed in a frame wooden box in accordance with the provisions of GB7284. 7.3 The mark should include the following content:
a.
h.
c.
d.
Manufacturer name;
Product Name and model specifications;
Manufacturing date;
Weight.
Additional notes:
This standard is proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Xi'an Heavy Machinery Research Institute. The main drafters of this standard are Li Shuoci and Li Weidong. 122
4. Tensile strength is in accordance with GB1040. 5.2.5 Bending strength shall comply with the provisions of GB1042. 5.2.6 Friction performance
5.2.6.1 Adjust the air pressure to 0.1MPa, adjust the moment of inertia of the driven part to a fixed value, and rotate at a speed of 3m/s (middle part of the friction pair), and keep clutching for a certain period of time , so that the contact area of ??each friction disk is no less than 85%, disassemble the clutch, measure the thickness of the friction disk every 90° in the middle, and find the average thickness of the friction disk. 5.2.6.2 Adjust the rotational inertia, inner disk speed and air pressure to a certain value, and continuously clutch 50,000 times at a frequency of 15 times per minute. During the continuous clutching process, the dynamic temperature of the friction pair shall not exceed 150C. Disassemble the clutch and measure the thickness of the middle part of the friction plate. Multiply the difference between the measured thickness and the thickness measured in 5.2.6.1 by the friction area of ??the friction disk to calculate the wear amount. Then based on the moment of inertia during the test and the angular acceleration of the inner disk, calculate the wear rate. The value shall not be greater than the value shown in the table. 2 regulations. 5.2.6.3 Under normal temperature conditions (below 100°C), adjust the inner disk speed to a certain value, and then adjust the air pressure and moment of inertia to a certain value from small to large (not the maximum value, but the air pressure should be adjusted to 0.5 MPa), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque at various air pressures and moments of inertia.
5.2.6.4 Under normal temperature conditions (below 100°C), adjust the air pressure to a certain value, and then adjust the moment of inertia and inner disk speed to a certain value from small to large (not the maximum value) ), clutch at a frequency of 10 times per minute, and measure the dynamic transmission torque under various moments of inertia and inner disk speed.
5.2.6.5 Adjust the moment of inertia and inner disk speed to a certain value, with a clutch rate of 25 times per minute, and when the air pressure is equal to 0.5MPa, continue clutching until the equilibrium temperature, and measure the following items: a. Balance Temperature:
b, starting from normal temperature, the static friction coefficient at every 20C. Calculation of static friction coefficient:
121
where: T—actually measured clutch transmission torque, N·mQ—axial pressing force, N;
n—- —-Number of friction pairs;
Rr effective friction radius, m.
Wuzhong: R----Outer radius of friction pair.m
·Inner radius of friction pair, m.
6 inspection rules
JB/T 7005-—93
,
Rr
T
nQR| |tt||.R3
2
It can only be released after it has passed the required inspection and is accompanied by a product quality certificate."
6.2 Before each clutch leaves the factory, the manufacturer shall conduct factory testing in accordance with the provisions of Article 5.2.6.1. 6.3 New clutches put into production and when the formula of the friction material is changed, shall be tested in accordance with the provisions of Article 5.2. If the inspection results are unqualified, they shall not be shipped out of the factory
6.4 Before conducting the test in Article 6.3, the clutches in the batch shall be Extract two clutches, test one on the other and conduct dimensional inspection on the other. 7 Marking and packaging
The anti-rust packaging of the clutch is in accordance with the regulations of GB4879. 7.11
7.2 The clutch after rust-proof packaging shall be packed in a frame wooden box in accordance with the provisions of GB7284. 7.3 The mark should include the following content:
a.
h.
c.
d.
Manufacturer name;
Product Name and model specifications;
Manufacturing date;
Weight.
Additional notes:
This standard is proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Xi'an Heavy Machinery Research Institute. The main drafters of this standard are Li Shuoci and Li Weidong. 122
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