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A wide head rotor for high vacuum positive displacement pump

A positive displacement pump, high vacuum technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve the problems of inability to constantly and effectively ensure the stability of the conveying pressure, poor sealing effect, low efficiency, etc., to ensure strength, reduce Pulse, the effect of improving work efficiency

Active Publication Date: 2020-06-23
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-vacuum displacement pump wide-head rotor, which mainly solves the problem of poor passability of cycloid-type, circular-arc-type, and involute-type rotors, and the gap between the rotor and the inner wall of the pump under high-pressure delivery conditions. The sealing effect is poor, and the stability of the delivery pressure cannot be guaranteed effectively, resulting in problems such as increased pulsation and low efficiency.

Method used

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  • A wide head rotor for high vacuum positive displacement pump
  • A wide head rotor for high vacuum positive displacement pump
  • A wide head rotor for high vacuum positive displacement pump

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0031] Such as Figure 1-2 The 1 / 4-shaped line of the wide-head rotor of the high-vacuum volumetric pump is composed of three parts: the top wide-head arc AB, the transition curve BCD, and the middle arc DE. The transition curve BCD can be composed of BC curve and CD curve, or can be composed of the whole BD curve composition.

[0032] The top wide head arc AB and the middle arc DE are two conjugate curves,

[0033] where the equations of AB are

[0034]

[0035] And ensure that the width of the AB surface sealing surface is greater than 5mm and less than 100mm.

[0036] where DE whose equation is

[0037]

[0038] Where: R=R 1 +R 2

[0039] 1) When BCD is transition curve BC and transition curve CD are two conjugate curves, transition curve BC and transition curve CD can be changed at will, and transition curve CD changes correspondingly with transition ...

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Abstract

The invention discloses a wide head rotor of a high vacuum displacement pump. In an existing cam pump technology, seal between a pump body and a rotor is linear pump, and therefore, vacuum capacity is easily caused to drop after the rotor and the pump body are worn. The end surface of the wide head rotor of the high vacuum displacement pump is of an axisymmetric structure, and a 1 / 4 molded line of the end surface consists of three parts: a top end wide head circular arc AB, a transition curve BD and an intermediate circular arc DE, and the rotor is formed by wrapping a metal framework and rubber; and the top end wide head circular arc AB and the intermediate circular arc DE of the wide head rotor are two conjugate curves. The wide head rotor effectively increases a working pressure range of the high vacuum displacement pump, ensures lasting stability of conveying pressure, reduces pulsation and improves working efficiency.

Description

technical field [0001] The invention relates to high vacuum displacement pump parts, in particular to a high vacuum displacement pump wide head rotor. [0002] technical background [0003] At present, most of the rotors of cam pumps conveying various media are made of three types of lines: cycloid, arc, and involute. The sealing state formed between these types of rotors and the inner wall of the pump is a line seal. state, the sealing effect is not good, especially under high pressure conditions, the stability of the delivery pressure cannot be guaranteed effectively, and it is easy to cause problems such as increased pulsation and reduced delivery efficiency. At the same time, the regional space formed between the rotor and the inner wall of the pump Fixed size, poor media passability. Moreover, the rotors of cycloid type, arc type, and involute type are restricted by the profile line, and the shaft hole of the rotor and the shaft diameter matched with it are small, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/12F04C18/16F04C25/02C08L9/02C08L91/00C08K13/04C08K7/02C08K3/06C08K5/09C08K3/22C08K3/04
CPCC08K2201/014C08L9/02F04C18/126F04C18/16F04C25/02F04C2240/20F05C2225/02C08L91/00C08K13/04C08K7/02C08K3/06C08K5/09C08K2003/2296C08K3/04
Inventor 许静江锦波
Owner HANGZHOU DIANZI UNIV
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