This standard specifies the classification, technical requirements, test methods and inspection rules of flexible rod couplings. This standard is applicable to couplings that require angular offset compensation and (or) axial offset compensation for the two connected shafts. GB/T 14653-1993 Flexible rod coupling GB/T14653-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Flexible link coupling
Flexible link coupling
1 Subject content and scope of application
GB/T14653-93
This standard specifies the classification, technical requirements, test methods and inspection rules of flexible link couplings (hereinafter referred to as couplings). This standard applies to couplings that require angular offset compensation and (or) axial offset compensation for the two connected shafts. 2 Reference standards
GB699 Technical conditions for high-quality carbon structural steel
GB3077 Technical conditions for alloy structural steel
GB3931 Glossary of mechanical couplings
GB/T12922 Elastic damping spring coupling
CB819 Magnetic particle inspection of diesel engine parts
3 Product classification
3.1 Structural type
The coupling consists of internal components and external components. Its basic structure is shown in Figure 1. The inner and outer components are connected by eight groups (or six groups) of flexible rods made of alloy spring steel arranged along the tangential direction. The coupling can be set with spherical bearings to fix the axial rods according to the use requirements. AA
Internal components.·Internal components 2-Hexagonal bolts; Figure 1 Basic structure of coupling
External components: 3 Hexagonal bolts: 4 Outer ring; 5-Flange; 6 Flexible rods; 7 Spherical bearings State Technical Supervision Bureau approved on October 16, 1993 332
1994-07-01 implementation
Product type:
GB/T14653-93
3.2.1 According to the allowable speed, the coupling is divided into the following two types: ordinary type (S type) and high-speed type (H type). 3.2.2 According to the number of flexible rods, S type and H type have six or eight rod couplings respectively. 3.3 Basic parameters
The basic parameters of S-type couplings are shown in Table 1 and Table 2. The basic parameters of H-type couplings are shown in Table 3 and Table 4. 3.4 There are five types of combinations of couplings and the two connected shafts, see Appendix A (Supplement) 3.5 Connection types and main dimensions:
According to the combination type of couplings and the structure of flanges, there are four connection types: P, T, F, and K, see Figure 2 and Figure 5 respectively. The main connection dimensions, moment of inertia and weight are shown in Tables 5 to 8 respectively. 3.6 Product marking
Model S56, P-type connection type, 8 groups of rods, coupling with axial fixation, marked as: coupling S56P8A
GB/T14653-93
Model H56, P-type connection type, 6 groups of rods, coupling without axial fixation, marked as: H56P6GB/T14653-93
Coupling
Table 1 Basic parameters of S-type 6-rod coupling
Nominal torque
16 700 | | tt | | 133000 | Stiffness
Nm/rad
11.4×106
16.1 ×106 |
508×106
720×10°
1010×10 6 | | tt | | 1430X106 | tt||45×103
57×103
71X103|| tt||90×103
113×103
143×103
180×103
226×103
285×103
358×103
450×103
Axial stiffness
Maximum speed
Note: β in “Allowable angular offset” in the table refers to the continuous working state; βmx refers to the instantaneous working state. Parameter
Allowable angular offset
12×103|15×10
Nominal torque
11 200
125500
177500
250500
500000
706000
997000
1410000
1990000
2810 000 | | tt | 95×106
415×106| |tt||586×10%
825×106
1170×106
1650×106
2330×105
GB/T14653—93
Basic parameters of S-type 8-rod coupling
Bending stiffness
Nn/rad
11×10%
14×1 03
17 × 10% | 10%
171X103
215 ×103
271×103
341×10
430×103
540X103
Axial stiffness
Maximum speed
Note: β in the "allowable angular offset" in the table is the continuous working state; βmx is the instantaneous working state. Table 3 Basic parameters of H type 6-rod coupling
Nominal torque
26 700
37 700
Torsional stiffness
Nm/rad
11.4×106
16.1×106
22.7×106
45.3×106
64×105
90×106
Bending stiffness
Nm/rad
11×103
14×103
18×103
23X103
28×103
36×103
45×1 03
57×103
Axial stiffness
Maximum speed
Allowable angular offset
8×10-312×103|| tt||Allowable angular offset
9×103
11×10-3
Nominal torque
106500
1500 00
212000
300000
423000
598000
845000
1190000
1680000
Torsional stiffness
Nm/rad
128×106
180× 100
255×10%
360×105
508X106
720×106
1010×106
1430×10g|| tt||2020×106
Bending stiffness
Nm/rad
71×103||t t||90X103
113×103
143×103
180×10%
226×103
285×10
358×103
450×103
GB/T14653—93
Continued Table 3
Note: The "allowable angular displacement" in the table is for continuous working state, and β is for instantaneous working state. Table 4 Basic parameters of H type 8-bar coupling
Nominal torque
100500
142000
200500
283000
565:00 0
798000
1128000
1590000
2250000
Torsional stiffness
Nm/rad
6.9×10°| |tt||12.7×106
18.6×105
26.5×106||tt ||37.3×106
52×106
104×106
147×106
208×106
295x106
415× 105
586×106
825×106
1170×10g
1 650×106
2330×105
Bending stiffness
Nm/rad
11×103
14×103
17×103
22X103
27×103
34×103
43×103
54X103
68×109
86 ×103
108×10
136×103
171X103
215×103
271×103
341×103||tt| |430×103
540×103
Axial stiffness
Maximum speed
Note: The β of the allowable angular offset\ in the table is continuous T. working state; βm is the instantaneous.T working state. Parameters
Allowable angular offset
Allowable angular offset
19×10-3
S(H)25
S(H)28
S(H)40
S(H)45
S(H)50
S(H)56
S(H)63||tt ||S(H)71
S(H)80
S(H)90
S(H)100
S(H)112||tt ||S(H)125
S(H)140
S(H)160
S(H)180
Note: "in the table means d, Number of holes
GB/T14653—93
Figure 2P type
min total weight
Moment of inertia
S(H)25
S (H)28
S(H)40
S(H)45
S(H)50
S(H)56
S(H)63
S(H)71
S(H)80
S(H)90
S(H)100
S(H)112
S(H)125
S(H)140
S(H)160
S(H)180
GB/T 14653-93
Total weight domain
00 mti
Moment of inertia,
1 external h1o0mm
S(H)25
S(H)28
S(H)40||tt ||S(H)45
S(H)50
S(H)56
S(H)63
S(H)71||tt ||S(H)80
S(H)90
S(H)100
S(H)112
S(H)125||tt ||S(H)140
S(H)160
S(H)180
GB/T14653-93|| tt||Figure 4F type
16#2230
Total weight
Moment of inertia
S(H)25
S(H)28|| tt||S(H)40
S(H)45
S(H)50
S(H)56
S(H)63|| tt||S(H)71
S(H)80
S(H)90
S(H)100
S(H)112|| tt||S(H)125
S(H)140
S(H)160
S(H)180
GB/T 14653-93
Figure 5K type
Total weight
Moment of inertia
4 Technical requirements
GB/T14653-93
4.1 The coupling shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2 The performance indicators of the coupling shall comply with the provisions of Tables 1 to 4. 4.3 The permissible ambient temperature of the spherical bearing coupling is -30~ +90℃. 4.4 The permissible elastic vibration torque of the coupling is calculated according to Figure 6. T
, i
4.4.1 Calculation example:
Figure 6 Permissible vibration Torque
Coupling model: flexible rod coupling S56P8; nominal torque transmitted by the coupling: T. =88.900kNm, average torque of diesel engine: T=64.689kNm; allowable elastic vibration torque for continuous operation: T. =T.×0.38=33.782kNm; allowable elastic vibration torque for instantaneous operation: T. =T,× 0.572=50.851kNm. 4.5 For radial load of coupling (without spherical bearing), see Appendix B (supplement). 340
Instantaneous vibration delay
Continuous vibration torque||tt ||GB/T 14653--93
4.6 The internal and external components of the coupling can be the active and passive parts of each other. 4.7 When the coupling is installed in the shaft system, the distance between the two connecting flanges The difference between the measured distance and the nominal value shall not exceed ±0.2mm. 4.8 The main parts of the coupling shall be made of materials with performance not lower than that specified in Table 9. Table 9
Part Name
Hexagonal Bolt
Internal Component
50CrVA
42CrMo
45 (or 35)
Standard Number
GB3077
4.9 The length extension of the hexagonal bolts with part codes 2 and 3 in Figure 1 after tightening shall meet the design requirements. 4.10 Perform flaw detection on the key flexible rod, important hexagonal bolts (part codes 2 and 3) and finished internal components, and cracks are not allowed.
4.11 For couplings with actual working speed greater than 1500r/min, dynamic balance test shall be performed. 5 Test method
5.1 The flaw detection of the flexible rod, hexagonal bolts (part code 2, 3) and internal components shall be carried out in accordance with the provisions of GB819. 5.2 When the actual working speed of the coupling is higher than 1500r/min, the coupling shall be dynamically balanced according to the balancing accuracy level proposed by the International Standardization Association.
5.3 Static torsion test
5.3.1 Fix the coupling on the static torsion test bench and slowly load it at a speed of increasing the nominal torque by 10% per minute until the nominal torque is reached. Measure the torsion angle under the nominal torque. The allowable error of torsion stiffness is ±12%. 5.3.2 Add the torque to 1.3 times the nominal torque on the static torsion test bench. After unloading, place the coupling in a free state and visually inspect the appearance quality of the flexible rod parts. Cracks and distortion are not allowed. 5.4 Install the first coupling of the same model into the shaft system for testing. 5.4.1 The distance between the two connecting flanges should meet the requirements of Article 4.5. 5.4.2 Before starting, check whether the radial clearance between the internal and external components meets the design requirements. 5.4.3 Slowly load so that it reaches the rated power in more than 20 minutes, and then run for 30 minutes. After stopping, visually check the appearance quality of the flexible rod.
6 Inspection rules
Inspection is divided into factory inspection and type inspection.
6.1 Factory inspection
6.1.1 Visual inspection of appearance.
6.1.1.1 Check whether the flexible rod and internal components have scratches and bumps. 6.1.1.2 Check whether the hexagonal bolts with part numbers 2 and 3 are tightened with adhesive to prevent loosening as required. 6.1.2 Test the material of the flexible rod according to GB3077 standard. 6.1.3 Inspect the length elongation of the hexagonal bolts with part numbers 2 and 3 after tightening. 6.1.4 Perform dynamic balancing test according to the requirements of Article 5.2. 6.1.5 Products must be inspected and qualified by the quality inspection department and accompanied by a product certificate before they can leave the factory. 6.2 Type test
Type test should be carried out for the first product or when there are major changes in product structure, materials, and processes that may affect product performance. 6.2.1 Inspection items
GB/T 14653-93
In addition to the factory inspection items, static torsion test should also be carried out according to Article 5.3. 6.2.2 Sampling and batching rules
When the first batch of couplings is less than 10 units, one unit will be selected; when it is 10 to 50 units, two units will be selected; when it is more than 50 units, three units will be selected. If the first random inspection fails, double the random inspection will be carried out. If it fails again, each unit will be inspected. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 When the working speed of the coupling is higher than 1500r/min, the model and factory number of the coupling shall be engraved in a conspicuous position of the coupling.
When the working speed of the coupling is lower than or equal to 1500r/min, a nameplate shall be riveted on the coupling, and the following product model shall be marked on the nameplate:
b. Factory number;
Date of manufacture;
Name of manufacturer;
Product standard number implemented.
7.2 Packaging and transportation
7.2.1 After the coupling is treated with rust prevention, it shall be shipped according to the packing list. The packaging box shall be sturdy and lined with moisture-proof paper. 7.2.2 In addition to the coupling, the packaging box shall also contain the following documents: a. Product certificate;
b. Instruction manual;
c. Installation layout;
d. Packing list.
7.2.3 In addition to general transportation matters, the packaging box should also be marked with "handle with care", "moisture-proof" and "do not invert". 7.3 Storage
The coupling should be stored in a clean, dry and well-ventilated warehouse. The oil seal maintenance period is six months after leaving the factory. 312
GB/T 14653-93
Appendix A
Combination types of couplings
(Supplement)
A1 There are five types of combinations of couplings and two connected shafts. A coupling is connected to two shafts.
Where: β
The maximum angular offset compensation allowed when the coupling is working continuously, rad; Axial offset compensation, mm (soil a); The angle between the center lines of the two connected shafts, rad;
Parameters depending on the coupling model, mm. A coupling with a spherical bearing (i.e. axially fixed) is connected to the two shafts. Figure A2
471.3 Two couplings and an intermediate shaft are connected to the two shafts. Ba
-...........+.-...+.+.+..( A) )+*( A2)2 Packaging and transportation
7.2.1 After the coupling has been treated for rust prevention, it shall be shipped according to the packing list. The packing box shall be sturdy and lined with moisture-proof paper. 7.2.2 In addition to the coupling, the packing box shall also contain the following documents: a. Product certificate;
b. Instruction manual;
c. Installation layout drawing;
d. Packing list.
7.2.3 In addition to indicating general transportation matters, the packing box shall also be marked with words such as "handle with care", "moisture-proof" and "do not invert". 7.3 Storage
The coupling shall be stored in a clean, dry and well-ventilated warehouse. The oil seal maintenance period is six months after leaving the factory. 312
GB/T 14653-93www.bzxz.net
Appendix A
Combination types of couplings
(Supplement)
A1 There are five types of combinations of couplings and two connected shafts. A coupling is connected to two shafts.
Where: β
The maximum angular offset compensation allowed when the coupling is working continuously, rad; Axial offset compensation, mm (soil a); The angle between the center lines of the two connected shafts, rad;
Parameters depending on the coupling model, mm. A coupling with a spherical bearing (i.e. axially fixed) is connected to two shafts. Figure A2
471.3 Two couplings and an intermediate shaft are connected to two shafts. Ba
-...........+.-...+.+.+..( A) )+*( A2)2 Packaging and transportation
7.2.1 After the coupling has been treated for rust prevention, it shall be shipped according to the packing list. The packing box shall be sturdy and lined with moisture-proof paper. 7.2.2 In addition to the coupling, the packing box shall also contain the following documents: a. Product certificate;
b. Instruction manual;
c. Installation layout drawing;
d. Packing list.
7.2.3 In addition to indicating general transportation matters, the packing box shall also be marked with words such as "handle with care", "moisture-proof" and "do not invert". 7.3 Storage
The coupling shall be stored in a clean, dry and well-ventilated warehouse. The oil seal maintenance period is six months after leaving the factory. 312
GB/T 14653-93
Appendix A
Combination types of couplings
(Supplement)
A1 There are five types of combinations of couplings and two connected shafts. A coupling is connected to two shafts.
Where: β
The maximum angular offset compensation allowed when the coupling is working continuously, rad; Axial offset compensation, mm (soil a); The angle between the center lines of the two connected shafts, rad;
Parameters depending on the coupling model, mm. A coupling with a spherical bearing (i.e. axially fixed) is connected to two shafts. Figure A2
471.3 Two couplings and an intermediate shaft are connected to two shafts. Ba
-...........+.-...+.+.+..( A) )+*( A2)
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