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A Corrosion-resistant Wet Roots Vacuum Pump

A Roots vacuum pump, corrosion-resistant technology, applied in the direction of rotary piston pumps, pumps, rotary piston/swing piston pump components, etc., can solve the problem of reducing the service life of Roots vacuum pumps, increasing equipment investment costs, a large number of manpower, Material resources and other issues, to achieve the effect of ensuring vacuum degree, stable work, and improving service life

Active Publication Date: 2017-09-22
淄博华舜耐腐蚀真空泵有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In chemical or pharmaceutical production, the medium pumped by the Roots vacuum pump is corrosive to a certain extent, and most of the flow-passing parts of the existing Roots vacuum pump are made of stainless steel or carbon steel, and the pumped medium will affect the flow-passing parts of the Roots vacuum pump. Corrosion greatly reduces the service life of the Roots vacuum pump, increases the cost of equipment investment, and requires a lot of manpower and material resources when maintaining or replacing the Roots vacuum pump, which also has a great impact on production efficiency.

Method used

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  • A Corrosion-resistant Wet Roots Vacuum Pump
  • A Corrosion-resistant Wet Roots Vacuum Pump
  • A Corrosion-resistant Wet Roots Vacuum Pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1~2 As shown: the corrosion-resistant wet Roots vacuum pump includes a pump body, a driving shaft 16, a driven shaft 7, and a driving rotor 17 and a driven rotor 9 respectively arranged on the driving shaft 16 and the driven shaft 7.

[0037] The pump body includes a front pump body 6 and a rear pump body 8 . The front pump body 6 and the rear pump body 8 are cylinders with closed ends at one end, and the open ends of the front pump body 6 and the rear pump body 8 are provided with outer flanges for mutual connection around the outer wall. The front pump body 6 and the rear pump body 8 is fixedly connected through the outward flange, and the sealing is arranged between the outward flange of the front pump body 6 and the rear pump body 8. The front pump body 6 and the rear pump body 8 are hermetically connected through an outer flange. The closed ends of the front pump body 6 and the rear pump body 8 are provided with through holes for passing the drivi...

Embodiment 2

[0058]The difference between Embodiment 2 and Embodiment 1 is that: the shaft sleeve 5 is made of glass fiber reinforced plastic, and the compression fixing device includes a fixing sleeve 25 and a fixing nut 27. The left end of the fixing sleeve 25 directly contacts with the left end of the compression sealing sleeve 23 and is pressed tightly. The envelope 23 and the fixing nut 27 are fixed to the fixing sleeve 25 .

Embodiment 3

[0060] The difference between embodiment 3 and embodiment 1 is: remove compression sealing sleeve 23 and compression spring 24, the inner diameter of fixed sleeve 25 left end is slightly larger than the outer diameter of the boss of rotating sealing sleeve 22 left end, the boss of rotating sealing sleeve 22 extends Enter the right end of the fixed sleeve 25, and the fixed sleeve 25 pushes the rotating sealing sleeve 22 into close contact with the fixed sealing sleeve 21, and the joint part is located in the fixed sleeve 25.

[0061] The front pump body 6, the rear pump body 8, the driving rotor 17, the driven rotor 9 and the shaft sleeve 5 can also all be phenolic graphite acid-resistant molding compound or a mixture of phenolic asbestos acid-resistant molding compound and phenolic graphite acid-resistant molding compound in any proportion; the front pump body 6. The materials of the rear pump body 8, the driving rotor 17, the driven rotor 9 and the shaft sleeve 5 are selected ...

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Abstract

The invention discloses a corrosion resistant wet roots vacuum pump, and belongs to the technical field of vacuum pumps. The corrosion resistant wet roots vacuum pump comprises a pump body, a driving shaft (16), a driven shaft (7), and a driving rotor (17) and a driven rotor (9) which are respectively arranged on the driving shaft (16) and the driven shaft (7), and is characterized in that a shaft sleeve (5) is arranged on each of the driving shaft (16) and the driven shaft (7); the pump body, the driving rotor (17) and the driven rotor (9) adopt a phenolic aldehyde asbestos acidproof molding material, a phenolic aldehyde graphite acidproof molding material or a mixture of the phenolic aldehyde asbestos acidproof molding material and the phenolic aldehyde graphite acidproof molding material with arbitrary proportion; the shaft sleeves (5) adopt a phenolic aldehyde asbestos acidproof molding material, a phenolic aldehyde graphite acidproof molding material or a mixture of the phenolic aldehyde asbestos acidproof molding material and the phenolic aldehyde graphite acidproof molding material with arbitrary proportion; and a mechanical seal (3) is arranged between the driving shaft (16) and the pump body and between the driven shaft (7) and the pump body. According to the corrosion resistant wet roots vacuum pump provided by the invention, the pumped corrosive gases or liquids are isolated from metal parts, and the corrosion resistance is high.

Description

technical field [0001] A corrosion-resistant wet Roots vacuum pump belongs to the technical field of vacuum pumps, and in particular relates to a corrosion-resistant wet Roots vacuum pump which has good corrosion resistance and can directly pump corrosive gases or liquids. Background technique [0002] Roots vacuum pump (abbreviation: Roots pump) refers to a variable-capacity vacuum pump that is equipped with two leaf-shaped rotors that rotate synchronously in opposite directions. The Roots pump is a vacuum pump without internal compression, usually with a very low compression ratio, so high and medium vacuum pumps need a backing pump. The characteristics of the Roots vacuum pump are: fast start, low power consumption, low operation and maintenance costs, high pumping speed, high efficiency, insensitive to a small amount of water vapor and dust contained in the pumped gas, within the pressure range of 100 to 1 Pa With a large pumping rate, it can quickly remove the gas rele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/14F04C25/02F04C27/00F04C29/00
CPCF04C18/14F04C25/02F04C27/009F04C29/0042F04C2230/60F04C2240/20F04C2240/605F05C2225/00
Inventor 孙建华
Owner 淄博华舜耐腐蚀真空泵有限公司