Nitrogen-sealed dry type screw vacuum pump
A screw vacuum pump, nitrogen sealing technology, applied in the direction of rotary piston pump, sealing device of piston pump, pump, etc., can solve the problems of high price of imported screw vacuum pump, less than 10% penetration rate, poor reliability, etc., and achieve low cost , the effect of low cost and reduced manufacturing cost
Inactive Publication Date: 2017-05-31
JIANGYIN HUAXI ENERGY CONSERVATION TECH CO LTD
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- Application Information
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Problems solved by technology
Domestic dry screw vacuum pumps started relatively late, so far there is no relatively mature product, mainly reflected in poor reliability, high temperature rise, high noise, oil leakage and other defects. At present, the penetration rate of domestic screw vacuum pumps is less than 10%, and domestic screw vacuum pumps Vacuum pumps mainly rely on imports, and imported screw vacuum pumps are very expensive
Method used
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Embodiment Construction
[0025] see Figure 1~3 , a nitrogen-sealed dry-type screw vacuum pump related to the present invention, the nitrogen-sealed dry-type screw vacuum pump includes a pump body 1, and the front and rear ends of the pump body 1 are respectively equipped with a front end cover 8 and a rear end cover 2, so The front end cover 8 and the rear end cover 2 are respectively equipped with a front bearing seat 10 and a rear bearing seat 3, and the pump body 1 is connected with a driving screw 6 and a driven screw 7, and the driving screw 6 and the driven screw The two ends of 7 pass through the front end cover 8 and the rear end cover 2 respectively and are inserted into the bearing sleeves in the front bearing seat 10 and the rear bearing seat 3;
[0026] The fuel tank 12 installed on the front end cover 8 is provided with a motor 14, and one end of the driving screw 6 passing through the front bearing seat 10 is connected to the rotating shaft of the motor 14 through a coupling 13, and the...
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The invention provides a nitrogen-sealed dry type screw vacuum pump. Profiles of a driving screw and a driven screw of the vacuum pump are single-ended uniform-pitch trapezoidal teeth. A motor is arranged on an oil tank installed on a front end cover. The end, penetrating through a front bearing seat, of the driving screw is connected with a rotating shaft of the motor in a driven manner through a coupler. The coupler is located inside the oil tank. Lip-shaped seal pieces are arranged between the driving screw and a back bearing seat and between the driven screw and the back bearing seat. A dual seal piece is arranged between the driving screw and the front bearing seat and between the driven screw and the front bearing seat. The dual seal piece is a mechanical seal piece and a nitrogen seal device. The nitrogen seal device is a nitrogen cavity which is formed by the front bearing seat, the mechanical seal piece and the driving screw or the driven screw. The nitrogen cavity communicates with a nitrogen source. The nitrogen-sealed dry type screw vacuum pump is good in seal effect and high in air pumping efficiency.
Description
technical field [0001] The invention relates to a vacuum pump, in particular to a dry-type screw vacuum pump with nitrogen sealing structure, which belongs to the technical field of vacuum pumps. Background technique [0002] Dry screw vacuum pump is an ideal vacuum equipment developed in the early 1990s with the urgent needs of European and American companies for oil-free high vacuum equipment in the film, integrated circuit, and semiconductor industries. Due to the dry screw vacuum pump has the characteristics of high vacuum, stable pumping performance, wide pumping range, simple and compact structure, maintenance-free, no contact and friction between pumping components, no waste gas, no waste liquid discharge, etc., so the dry screw vacuum pump Vacuum pump is an ideal energy-saving and environmental protection product, which has been widely recognized and used by all walks of life. [0003] A pair of screws of the dry screw vacuum pump cannot touch each other, and a cert...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F04C25/02F04C18/16F04C27/00F04C29/06F04C29/04
CPCF04C25/02F04C18/084F04C18/16F04C27/009F04C29/042F04C29/06
Inventor 龙晋钱雪强
Owner JIANGYIN HUAXI ENERGY CONSERVATION TECH CO LTD