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Pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection

A technology for connecting components and compressors, applied in the direction of shrinkage connection, connecting components, threaded fasteners, etc., can solve problems such as mechanical damage, scraping between rotor and stator, and achieve the effect of eliminating static deflection and improving reliability

Inactive Publication Date: 2019-05-31
SHENYANG TURBO MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the conventional bolt connection is used, there is a gap between the bolt and the connection hole. Even if the hinged hole bolt is used, there is still a small gap for smooth assembly. As long as the gap exists, the static deflection of the rotor will increase. Or large static deflection during speed up will cause the rotor and stator to scrape and cause serious mechanical damage

Method used

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  • Pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection
  • Pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection
  • Pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a pre-tightened bolt connection assembly suitable for connecting the main shaft of an ultra-large compressor includes a bolt mechanism and a disassembly mechanism; the bolt mechanism includes a screw 1, a bush 2 set in the middle of the screw 1, and a The nut 3 with detachable connection at both ends, the bushing 2 is set on the screw 1 in a truncated cone shape coaxial with the center line of the screw 1, and the radius of one end surface of the bushing 2 is not greater than the radius of the main shaft connection hole 4, the bushing The radius of the other end surface of 2 is greater than the radius of the main shaft connecting hole 4; the disassembly mechanism is detachably connected with one end of the screw 1, and the disassembly mechanism is used to move the screw 1 axially in the main shaft connection hole 4 to complete the bolt on the main shaft. Assembly and disassembly in hole 4.

[0027] In this embodiment, the bushing 2 is fitted ...

Embodiment 2

[0042] Referring to Embodiment 1, the difference between the pre-tightened bolted connection assembly provided in this embodiment is that, as figure 2 As shown, the assembly and disassembly mechanism also includes connectors 12 that can be connected to the screw rod 1 and the high-pressure oil pump 6 at both ends.

[0043] The usage method of the bolted connection assembly of the present embodiment is as follows:

[0044] (1) Connect one end of the connector 12 to one end of the screw 1 assembled in the main shaft connecting hole 4, and then connect the other end of the connector 12 to the high-pressure oil pump 6;

[0045] (2) Fill the bolt connection assembly with oil pressure through the high-pressure oil pump 6, stretch the screw rod 1, and the operating pressure must be greater than the oil pressure during installation;

[0046] (3) Unscrew the nut 3, release the oil pressure, and then take off the connector 12 to complete the disassembly of the screw 1 in the main shaf...

Embodiment 3

[0048] Referring to Embodiment 2, the difference between the pre-tightened bolted connection assembly provided in this embodiment is that, as image 3 As shown, the dismounting mechanism also includes a nut dismounting unit. The nut dismounting unit includes a second connecting rod 13 detachably connected to the nut 3 at one end, and a support sleeve 14 and a second cylinder that are sequentially sleeved on the outside of the second connecting rod 13. body 15 and the second piston 16 , and the end of the support sleeve 14 away from the second cylinder body 15 is detachably connected to the nut 3 through the connecting sleeve 17 .

[0049] As a preferred embodiment, a third O-ring 18 is provided on the contact surface between the second cylinder 15 and the second piston 16 .

[0050] The usage method of the bolted connection assembly of the present embodiment is as follows:

[0051] (1) The second connecting rod 13 is connected with the nut 3 through the connecting sleeve 17; ...

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Abstract

The invention discloses a pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection. The pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection comprises a bolt mechanism and a disassembling and assembling mechanism; the bolt mechanism comprises a screw, a bushing arranged in the middle of the screw in a sleeving mode and nuts detachably connected with the two ends of the screw, the bushing is arranged on the screw in a sleeving mode and shaped like a circular truncated cone coaxial with the central line of the screw, the radius of one end face of the bushing is not larger than that of a spindle connecting hole, and the radius of the other end face of the bushing is larger than that of the spindle connecting hole; and thedisassembling and assembling mechanism is detachably connected with one end of the screw, the disassembling and assembling mechanism is used for enabling the screw to axially move in the spindle connecting hole, and then disassembling and assembling of a bolt in the spindle connecting hole are completed. According to the pre-tightening type bolt connecting assembly for ultra-large compressor spindle connection, zero-clearance fitting between the side face of the bushing and the spindle connecting hole is achieved, therefore, the static deflection of an ultra-large compressor spindle is eliminated, and then the continuous running reliability of an ultra-large compressor is improved.

Description

technical field [0001] The invention belongs to the technical field of compressor main shaft connection, and in particular relates to a pre-tightened bolt connection assembly suitable for super large compressor main shaft connection. Background technique [0002] With the large scale of the energy and chemical industry, the size of the ultra-large turbo compressors used in the process industry is also increasing. Among them, the main shaft of a typical 100,000-class air separation compressor in China is 8 meters long, and the diameter of the main shaft reaches 1.3 meters, in order to reduce the manufacturing difficulty and transportation weight of this type of compressor, the main shaft is usually processed in sections, and then the sub-processed main shaft sections are bolted together to complete the installation of the main shaft. Among them, a hollow structure is adopted in the middle section with a larger diameter of the main shaft, which can not only ensure the rigidity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B4/00F16D1/02F16B35/00F04B39/14B23P19/06
Inventor 张鹏飞汪创华杜崇洋葛丽玲金鑫
Owner SHENYANG TURBO MASCH CORP
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