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Integrated internal spiral hollow screw rotor

A hollow screw and internal screw technology, applied in the direction of rotary piston pumps, liquid fuel engines, rotary piston machinery, etc., can solve the problem of increasing the influence of stress, structure and temperature on operation, and reduce the ultimate vacuum degree and power of screw rotors. To solve the problems of mechanical properties and fatigue life, to achieve the effect of enhancing fatigue strength and service life, high dynamic balance performance, and increasing the contact surface

Active Publication Date: 2022-06-07
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the operation of the high-speed rotary system of the screw rotor continue to be affected by stress, structure, and temperature, thereby reducing the ultimate vacuum degree, dynamic performance and fatigue life of the screw rotor

Method used

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  • Integrated internal spiral hollow screw rotor
  • Integrated internal spiral hollow screw rotor
  • Integrated internal spiral hollow screw rotor

Examples

Experimental program
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Effect test

Embodiment 1

[0037] like Figure 1-4 As shown, the first embodiment of the present invention provides an integrated inner helical hollow screw rotor, the screw rotor is a single-head equal-pitch screw rotor, including a rotating shaft 2 and a helical blade 1 arranged on the rotating shaft 2, wherein the helical blade 1 is Equal pitch, and a hollow structure, the shaft 2 is provided with a central hole 7 along the axis direction, the central hole 7 is communicated with the hollow structure of the helical blade 1; the central hole 7 of the rotating shaft 2 and the hollow structure of the helical blade 1 as a whole satisfy the screw rotor The center of mass of any cross-section is located on the central axis of the rotating shaft 2, so as to satisfy the static balance of the screw rotor.

[0038] like figure 1 As shown, in the embodiment of the present invention, the axial direction of the central hole 7 is a blind hole, and the outer shaft end is the intake end 10; one end of the hollow str...

Embodiment 2

[0055] like Figure 5-7 As shown, the second embodiment of the present invention provides an integrated inner helical hollow screw rotor, the screw rotor is a single-head variable-pitch screw rotor, including a rotating shaft 2 and a helical blade 1 arranged on the rotating shaft 2, wherein the helical blade 1 is Variable pitch and a hollow structure, the shaft 2 is provided with a central hole 7 along the axis direction, and the central hole 7 is communicated with the hollow structure of the helical blade 1; on the central axis of the screw rotor to satisfy the static balance of the screw rotor.

[0056] The difference between the single-head variable-pitch screw rotor and the single-head equal-pitch screw rotor in this embodiment is only that the pitch of the helical blade 1 changes. All of them change adaptively with the increase of the pitch, which ensures that when the rotor changes with different pitches, the entire system still meets the static balance of each end face...

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Abstract

The invention relates to the technical field of vacuum oil-free screw pumps, in particular to an integrated internal spiral hollow screw rotor. Comprising a rotating shaft and spiral blades arranged on the rotating shaft; a center hole is formed in the rotating shaft in the axis direction. The spiral blade is of a hollow structure and communicates with the center hole through a spiral groove in the surface of the rotating shaft. The center hole of the rotating shaft and the hollow structure of the spiral blade integrally meet static balance of any section, the center of mass is located on the center axis of the rotating shaft, and through the non-uniform design of the closed end face, the whole screw rotor meets the dynamic balance requirement on the basis of static balance. Due to the internal spiral hollow structure, the mass is lighter, the energy consumption is lower, the dynamic balance performance is higher, the anti-vibration capability is stronger, and the noise is lower; and as medium gas can be introduced into the internal spiral hollow structure, the rotor has good heat dissipation performance, the thermal deformation of the rotor is reduced, the fatigue resistance is enhanced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of vacuum oil-free screw pumps, in particular to an integrated inner screw hollow screw rotor. Background technique [0002] As the core component of the screw vacuum pump, the performance and characteristics of the screw rotor directly affect the pumping efficiency, ultimate vacuum and fatigue life of the screw pump. Therefore, the design and manufacture of screw rotor is one of the key technologies in the production of the entire screw pump, and it is also a common technical problem faced by domestic enterprises in the process of developing and developing screw vacuum pumps. [0003] As a high-speed rotating component, the screw rotor generally has the phenomenon that the mass distribution is uneven and the center of mass deviates from the axis of rotation. This will not only increase the friction in the moving pair and the internal stress of the components, reduce the mechanical efficiency and service li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/08F04C29/00F04C29/04F04C29/06
CPCF04C18/084F04C29/04F04C29/06F04C2240/20F04C2240/807F04C2270/12F04C2270/13Y02T10/12
Inventor 谢元华王健王光玉徐静怡刘坤黄成王桂鹏巴要帅巴德纯刘在行
Owner NORTHEASTERN UNIV
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