HG/T 21569.2-1995 Stirring transmission device - block elastic coupling HG/T21569.2-1995 standard download decompression password: www.bzxz.net

One-piece elastic coupling for stirring transmission device HG21569.2--95
1 Subject content and scope of application
This standard specifies the type, size, technical requirements, selection and marking requirements of one-piece elastic coupling for stirring transmission device.
This standard applies to the connection between the output shaft of the reducer and the drive shaft of the stirring transmission device. The drive shaft must be supported on a double-pivot frame, and the coupling only serves to transmit torque. This standard is not applicable to single-pivot frames and is not used as a coupling in a kettle. 103
GB1095
GB1184
GB1801
GB 1804
GB9439
GB11352
HG21563
HG21568
Referenced standards
《Test method for tensile strength of rubber》
《Test method for Shore A hardness of rubber》
《Surface dimensions of flat keys and keyways》
《Provisions for shape and position tolerances without tolerances》《Basic dimensions to 500mm preferred and commonly used fits》"Limit deviations of dimensions without tolerances"
"Gray cast iron parts"
"Casting carbon steel for general engineering"
"System combination, selection and technical requirements of agitator transmission device""Agitator transmission device - transmission shaft"
3 Type, size, material
3.0.1·The type and size of the block elastic coupling shall be in accordance with the provisions of Figure 3.0.1 and Table 3.0.1. 3.0.2 The specifications of the coupling shall be determined according to the upper end shaft diameter d of the transmission shaft specified in HG21568. The shaft hole of the upper coupling of the coupling is determined by the shaft diameter of the selected reducer output shaft. It is allowed to use a combination of unequal shaft diameters of the reducer output shaft and the shaft diameter d of the upper end of the transmission shaft, but the shaft diameter shall not be greater than d1. Upper coupling
2. Lower coupling
3. Elastic block
Figure 3.0.1 Block type elastic coupling
Main dimensions of block type elastic coupling
The parts and materials of block type elastic coupling shall be in accordance with the provisions of Table 3.0.3. Parts and materials
Upper coupling
Lower coupling
Elastic block
HT250(GB9439)
(Code HT)
Natural rubber or synthetic rubber
Grade 33H(GB77)
(r/min)
Table 3. 0. 1
ZG270-500(GB11352)
(Code ZG)
The elastic block is made of natural rubber or synthetic rubber, with a required breaking strength of 26~33N/mm and a breaking elongation of 3. 0. 41
600%~700%(GB528): Shore hardness is 74~～78(GB531). 106
Technical requirements
4.0.1 The unmarked dimension tolerance of the coupling shall comply with the IT14 grade of GB1804, and the unmarked shape and position tolerance shall comply with the B grade of GB1184.
4.0.2 The dimension and deviation of the keyway of the shaft hole shall comply with the provisions of GB1095. 4.0.3 The radial deviation of the upper and lower half couplings shall be allowed to be 0.2mm; the angular deviation shall be 30°. 4.0.4 The fit between the shaft hole and the shaft shall comply with the provisions of Table 4.0.4. The fit between the shaft hole and the shaft of the coupling
>30～50
Match code (GB1801))www.bzxz.net
The selection of couplings shall comply with the provisions of HG21563 and 3.0.2 of this standard. 108
HG 21569.2-95 Coupling
Marking and marking examples
Material code (see Table 3.0.3)
Upper coupling hole diameter (if the output shaft diameter of the reducer is the same as that of the lower coupling, it can be omitted)
Lower coupling hole diameter (i.e. the upper end diameter of the transmission shaft d,) 6.2 Marking examples
Example 1: Cast iron block type elastic coupling, the upper coupling hole diameter is 55mm, the lower coupling hole diameter d, = 60mm, its marking is:
HG 21569. 2--95
Coupling 60/55-HT
Example 2: Cast steel block type elastic coupling, the upper and lower coupling hole diameters are 70mm, its marking is: HG 21569.2--95
Coupling 70—ZG
Month Proposer, editor-in-chief
Additional notes
and main drafters
Proposer: Equipment Design Technology Center Station of Ministry of Chemical Industry Editor-in-chief: Shanghai Pharmaceutical Design Institute
Equipment Design Technology Center Station of Ministry of Chemical Industry
Main drafters: Bao Aiyuan Yu Jun
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