SU1521915A1 - Vacuum pump - Google Patents

Abstract

The invention improves the efficiency of the vacuum pump by improving lubrication. In the housing 1 is placed eccentric rotor 2 with radial grooves. The blades 3 are installed in the slots with the formation of cavities 4, 5 suction and injection. The inner surface of the housing 1 is made in the form of two cylindrical sections 8, 9, the radius of one of them is larger, and the other is equal to the radius of the rotor 2. The grooves 11 of the oil supply are made on the border of sections 8, 9 from the side of the cavity 5. As the rotor 2 rotates, the amount of oil is trapped required to seal the gap. Excess oil is drained into cavity 5. As a result, there is no overpressure in the lubrication system. 2 Il.

Description

SP

to

CO SL

S

I The invention relates to pump and compressor engineering, in particular to mechanical vacuum pumps with oil seals, and can be used in vacuum process equipment for the production of electronic equipment, in metallurgy, the pharmaceutical industry and other fields of science and technology. technology. ; The purpose of the invention is to increase the efficiency of the pump by improving lubrication.

FIG. Figure 1 shows the pump, the booster pump; figure 2 - view A on

() IG. one .

I The pump includes a housing 1, an eccentric rotor 2 with lobes 3 placed therein. The latter are formed with the cortus 1 of the suction cavity 4 and the harness 5. The suction cavity 4 is co-powered (1 with the inlet-6, and jtocTb 5 injection with an outlet channel 7. The inner surface of the box 1 is made in the form of two cylindrical sections 8 and 9. The radius of section 8 is larger than the radius of the rotor 2, and the radius of section 9 is equal to the radius of the rotor 2. At the boundary of 10 sections 8 and 9 liopnyca 1 on the side of cavity 5 on ™, the gnathan are filled with grooves I 1 of the YasL supply. Between the outlet channel 7 and 3 tkom 9 on the surface of the housing 1 | Execute zyemki 12,

|; The pump works as follows: I The working medium through the inlet duct 6 enters the suction cavity 4. When the rotor 2 rotates, the working medium moves the blades 3 to the outlet channel 7. The oil pump (not shown) through the channel system (not shown) Oil flows into the slots 11. During rotation, the rotor 2 captures the amount of oil required to seal the gap. The excess amount of oil is drained into the pumping cavity 5 and further discharged into the oil sump of the pump (not shown). As a result, there is no overpressure in the lubrication system and there is no need for accurate metering of the oil supply.

Claims (1)

Invention Formula A vacuum pump comprising a housing, an eccentric rotor with radial grooves placed in it, blades installed in the grooves with the formation of suction and injection cavities, the inner surface of the housing is complete in the two cylindrical sections, the radius of one of which is larger and the other equal to the rotor radius, while in the second section there are oil supply grooves, characterized in that, in order to increase pump efficiency by improving lubrication, the grooves are made on the border of the cylindrical sections of the housing with sides of the pressure cavity. Si / ff / ffoBt p iiff o FI.2