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Screw vacuum pump with piston ring sealing and mechanical sealing structures

A technology of screw vacuum pump and sealing structure, which is applied in the sealing device of piston pump, rotary piston pump, rotary piston machine, etc. Good heat dissipation effect, avoid rapid heating, stable and reliable work

Inactive Publication Date: 2016-08-24
无锡市四方真空设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the shaft end of the screw vacuum pump is provided with a skeleton oil seal to achieve a sealing effect, but long-term operation is likely to cause the shaft end to heat up and expand, and the skeleton oil seal wears faster, which affects the sealing effect, and in severe cases affects the normal use of the screw vacuum pump

Method used

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  • Screw vacuum pump with piston ring sealing and mechanical sealing structures
  • Screw vacuum pump with piston ring sealing and mechanical sealing structures
  • Screw vacuum pump with piston ring sealing and mechanical sealing structures

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Embodiment Construction

[0019] Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

[0020] Such as figure 1 As shown, the present invention mainly includes a pump body 1, and an active rotor 9 and a passive rotor 10 are arranged side by side in the pump body 1. The exhaust end of the active rotor 9 is connected to the motor 5 through a coupling 6, and the motor 5 drives the active rotor 9 to rotate. .

[0021] The active rotor 9 drives the passive rotor 10 to rotate synchronously and reversely together through the meshing gear transmission mechanism. The gear transmission mechanism includes the active transmission gear 7 and the driven transmission gear 8, and the active transmission gear 7 is arranged on the exhaust end of the active rotor 9 A passive rotor 10 is provided on the exhaust end of the passive rotor 10 , and the active rotor 9 is engaged with the passive rotor 10 .

[0022] The pump body 1 is provided with a suction por...

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PUM

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Abstract

The invention relates to a screw vacuum pump, in particular to a screw vacuum pump with piston ring sealing structures, and belongs to the technical field of screw pump sealing structures. The screw vacuum pump comprises a pump body, an air exhaust end of the pump body is connected with a front end cover, an air exhaust end of a drive rotor and an air exhaust end of a driven rotor are connected with the front end cover through angular contact ball bearings respectively, and air exhaust end sealing structures are arranged between the front end cover and the drive rotor and between the front end cover and the driven rotor respectively; an air inlet end of the pump body is connected with a back end cover, an air suction end of the drive rotor and an air suction end of the driven rotor are connected with the back end cover through deep groove ball bearings respectively, and air suction end sealing structures are arranged between the back end cover and the drive rotor and between the back end cover and the driven rotor respectively. According to the screw vacuum pump, the mechanical sealing structures re adopted at the air exhaust ends, and therefore cleanliness of the air exhaust end bearings, gears and lubricating oil; at the air suction ends, due to the fact that the inlet pressure is smaller than the atmosphere pressure, piston ring sealing can be adopted as back end cover sealing, and then it is guaranteed that the screw pump can work for a long time.

Description

technical field [0001] The invention relates to a screw vacuum pump, specifically a screw vacuum pump with a combination of a piston ring sealing structure and a mechanical sealing structure, belonging to the technical field of screw pump sealing structures. Background technique [0002] The screw pump vacuum is a new type of mechanical pump for pumping gas, which is characterized by relatively simple structure, advanced technology, and insensitivity to pumping gas. Wide pumping speed range, no pollution. It can be combined with Roots pumps to meet the advantages of large pumping capacity, high vacuum degree, and low energy consumption. It can also be used alone and has a wide range of applications. It is a substitute for mechanical pumps such as rotary vane pumps and water ring pumps. [0003] In the prior art, the shaft end of the screw vacuum pump is provided with a skeleton oil seal to achieve a sealing effect, but long-term operation is likely to cause the shaft end to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/16F04C25/02F04C27/00
CPCF04C18/16F04C25/02F04C27/00
Inventor 茆林凤陆洪华谷军张卫卫徐明星
Owner 无锡市四方真空设备有限公司
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