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Self-locking centrifugal compressor impeller structure

A centrifugal compressor and self-locking technology, which is applied in the direction of mechanical equipment, non-variable pumps, machines/engines, etc., can solve the problems of low connection reliability, improve dynamic balance accuracy, increase friction, and improve The effect of maximum torque

Pending Publication Date: 2019-07-16
上海优社动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a self-locking centrifugal compressor impeller structure to solve the low reliability of the connection between the impeller and the rotor shaft of the centrifugal compressor in the prior art technical issues

Method used

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  • Self-locking centrifugal compressor impeller structure
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  • Self-locking centrifugal compressor impeller structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A self-locking centrifugal compressor impeller structure, such as figure 1 and figure 2 As shown, the impeller 1 and the rotor shaft 2 are included. Such as figure 2 As shown, an inner spigot 11 is provided on the end surface of the impeller 1 , and an outer tapered surface 12 is provided on a surface perpendicular to the inner spigot 11 . An outer spigot 21 is provided on the end surface of the rotor shaft 2 , and an inner tapered surface 22 is provided on a surface perpendicular to the outer spigot 21 . The outer spigot 21 is transition fit or interference fit in the inner spigot 11 , and at the same time, the outer conical surface 12 is in contact with the inner conical surface 22 , so that the impeller 1 is connected to the rotor shaft 2 . It is worth noting that: the angle between the outer cone surface 12 and the inner cone surface 22 relative to the horizontal direction is 50° to 80°. Considering the strength of the material of the impeller 1 and the rotor s...

Embodiment 2

[0046] As preferably, in order to realize the present invention better, optimize further on the basis of above-mentioned embodiment, especially adopt following setting structure:

[0047] Such as Figure 1 to Figure 5 As shown, the interior of the rotor shaft 2 has a cavity, and a tie rod 3 is arranged between the impeller 1 and the rotor shaft 2, and the tie rod 3 is arranged in the cavity. A threaded hole 32 is provided at the axial center of the cavity of the rotor shaft 2 , the end of the pull rod 3 has an external thread, and the pull rod 3 is threadedly connected to the threaded hole 32 through the external thread. Wherein, the screw thread direction of the screw hole 32 is opposite to the rotation direction of the impeller 1 . The pull rod 3 is provided with a limiting boss 31 at a position close to the external thread. A locking nut 5 is arranged on the tie rod 3 for locking the impeller 1 on the rotor shaft 2 .

[0048]The screw thread direction of the threaded hol...

Embodiment 3

[0050] As preferably, in order to realize the present invention better, optimize further on the basis of above-mentioned embodiment, especially adopt following setting structure:

[0051] Such as Figure 1 to Figure 5 As shown, an impeller gasket 4 is arranged between the lock nut 5 and the impeller 1, and the impeller gasket 4 and the end surface of the impeller 1 are connected by a key. A screw hole 41 is provided on the impeller spacer 4 , and the impeller spacer 4 is fixedly connected with the impeller 1 through the screw hole 41 by the screw 6 . To ensure that the relative rotation between the impeller spacer 4 and the impeller 1 does not occur.

[0052] Such as Figure 1 to Figure 5 As shown, the pull rod 3 is also provided with a square key 7, and the center of the impeller 1 and the impeller gasket 4 is provided with a square hole that fits with the square key 7. The impeller 1 and the impeller gasket 4 are connected to the Tie rod 3 gap connection.

[0053] First ...

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Abstract

The invention discloses a self-locking centrifugal compressor impeller structure, and relates to the technical field of compressor impeller structures. The technical problem of low connection reliability between an impeller and a rotor shaft of a centrifugal compressor in the prior art is solved. The self-locking centrifugal compressor impeller structure comprises an impeller and a rotor shaft, the end face of the impeller is provided with an outer conical surface, the end face of the rotor shaft is provided with an inner conical surface, the outer conical surface is connected with the inner conical surface through transition fit or interference fit, and the rotor shaft locks the impeller. Due to the fact that the impeller rotated at a high speed is expanded outwards under the action of self centrifugal force and work heating, the structural design that the outer conical surface of the impeller makes contact with the inner conical surface of the rotor shaft is added on the basis of seam allowance fit between the impeller and the rotor shaft in the prior art, the inner conical surface of the rotor shaft can limit the outward expansion effect of the outer conical surface of the impeller, so that dynamic balance precision in the working process of the rotor shaft and the impeller is favorably maintained, and the maximum transferable torque is improved.

Description

technical field [0001] The present invention relates to the technical field of compressor impeller structure, in particular to a self-locking centrifugal compressor impeller structure. Background technique [0002] Centrifugal compressor is a kind of turbo compressor, which gives the gas centrifugal force through the high-speed rotation of the impeller, which increases the kinetic energy of the gas, and then reduces the gas flow rate through the diffuser, thereby increasing the gas pressure. Due to the advantages of large air volume, simple and compact structure, light weight, small unit size, small footprint, and high efficiency, centrifugal compressors are currently widely used in chemical, petroleum, refrigeration, sewage treatment and other industries. [0003] For centrifugal compressors, higher speed means higher energy density and higher efficiency. However, the problems brought about by higher speed are stricter vibration control, more stringent requirements for stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/66F04D29/62
CPCF04D29/266F04D29/284F04D29/662
Inventor 吕鹏曹施鹏林伟伟陈华凉冯凯
Owner 上海优社动力科技有限公司
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