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Three-shaft multi-stage Roots pump

A Roots pump and pump casing technology, applied in the field of three-axis multi-stage Roots pumps, can solve problems such as large cumulative errors, achieve the effects of reducing the use of parts, ensuring pumping efficiency, and improving assembly efficiency

Active Publication Date: 2022-01-04
江苏格里克真空技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of large cumulative errors during assembly, the present invention provides a three-axis multi-stage Roots pump

Method used

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  • Three-shaft multi-stage Roots pump
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  • Three-shaft multi-stage Roots pump

Examples

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specific Embodiment

[0063] refer to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5, as a specific embodiment of the present invention, the three-shaft multi-stage Roots pump includes a pump casing, a multi-stage Roots rotor disposed in the pump casing and three rotating shafts, the three rotating shafts are respectively the first rotating shaft 460 and the second rotating shaft 470 and the third rotating shaft 480 , the pump casing includes an upper pump casing 100 and a lower pump casing 200 . Wherein, the lower end surface of the upper pump casing 100 is respectively provided with a first positioning hole 170 near the two axial ends, and correspondingly, the upper end surface of the lower pump casing 200 is also respectively provided with a first positioning hole 170 near the axial ends. A positioning pin can be inserted into the first positioning hole 170 . The first positioning hole 170 can improve the accuracy of assembling the upper and lower pump casings. When the upper pump...

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Abstract

The invention relates to a three-axis multi-stage Roots pump, which comprises an upper pump casing and a lower pump casing; a first positioning hole is opened on the lower end surface of the upper pump casing, and a first positioning hole is also opened on the upper end surface of the lower pump casing; In the pump casing, there are first-level lower partitions, second-level lower partitions, third-level lower partitions, fourth-level lower partitions, and fifth-stage lower partitions in sequence from one axial end of the lower pump casing to the other axial end; one side of the first-level lower partition There is a lower storage tank for the first-stage rotor, and a lower storage tank for the first rotating shaft on the other side; a lower storage tank for the second-level rotor is provided on one side of the second-level lower partition, and a lower storage tank for the third rotating shaft is opened on the other side. slot; one side of the third-stage lower partition is provided with the lower accommodation groove of the third-stage rotor, and the other side is provided with the lower accommodation groove of the first rotating shaft; one side of the fourth-stage lower partition is provided with the lower accommodation groove of the fourth-stage rotor, and the other One side is provided with a lower storage tank for the third rotating shaft; one side of the fifth-stage lower partition is provided with a lower storage tank for the fifth-stage rotor, and the other side is provided with a lower storage tank for the first rotating shaft.

Description

technical field [0001] The invention relates to the technical field of Roots pumps, in particular to a three-shaft multi-stage Roots pump. Background technique [0002] The three-shaft multi-stage Roots pump is a new oil-free dry vacuum pump. There are three parallel shafts in each pump cavity. The three shafts rotate at the same speed and the second shaft (middle pump shaft) in the middle and the second shaft in the middle. The first rotating shaft (left pump shaft) and the third rotating shaft (right pump shaft) on adjacent two sides rotate in opposite directions. Paired rotors are arranged in each pump chamber, and the paired rotors of the odd-numbered pump chambers are respectively connected to the second rotating shaft and the first rotating shaft, and the paired rotors of the even-numbered pump chambers are respectively connected to the second rotating shaft and the third rotating shaft , thus forming a unique airflow channel. This unique structure, compared with dry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C23/00F04C18/12F04C29/04F04C29/00
CPCF04C23/001F04C18/126F04C29/04F04C2240/30F04C2240/20
Inventor 荣易戴坚
Owner 江苏格里克真空技术有限公司
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