RU1795147C - Vacuum pump - Google Patents

Abstract

SUMMARY OF THE INVENTION: an eccentric shaft is placed in the working cylinder of the housing with channels for supplying and discharging the working medium with the formation of suction and discharge chambers. A plunger is installed on the shaft, the shank of which is placed in a guide having a sampling periodically in communication with the discharge chamber. A throttle channel is made in the housing. The guide is placed in the housing with the possibility of angular movement and periodic, communication of the sample with the oil chamber at the time of separation of the sample from the discharge chamber. Bypass channels are made in the guide and the shank with the possibility of periodic communication of the suction chamber with. sampling. The bypass channels are arranged to communicate with the suction chamber at the moment of its separation from the discharge chamber with the throttle channel blocked. 2 s.p. f-ly, 1 ill.

Description

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WITH

FIELD OF THE INVENTION This invention relates to oil sealed plunger vacuum pumps. . ...; ... The purpose of the invention is to reduce ultimately; the residual pressure at the inlet to the pump, increasing its productivity and reducing its power consumption.

The invention is illustrated in the drawing, in which a sectional view of a vacuum pump is shown.

The vacuum pump contains: housing. 1, guide 2, oil chamber 3, working chambers 4 and 5. respectively suction and discharge, shaft 6, cam 7, plunger 8, bypass channel 9, suction channel 10, discharge valve 11, sample 12, oil intake pipe 13, throttle channel 14 and bypass channel 15.

Haboc works as follows. Under the action of the plunger 8, driven in

: the movement of the eccentric 7, the guide 2 makes an oscillatory movement, as a result of which the sample 12 made in it periodically communicates with the discharge chamber 5 and the oil chamber 3. Thus, through the throttle channel 14 in the housing 1, the sampling 12 is taken from the oil chamber 3 portion of the oil, which is then fed into the discharge chamber 5. At the moment of the oil supply to the discharge chamber 5, the pressure of the medium equal to the sample 12 is equalized. The pressure of the medium located in the sample 12 depends on its filling. The pressure is pumped. Gas exerts a strong influence on ensuring lubrication of the rotary mechanism. In order to reduce the effect of the pressure of the pumped gas on the filling of the sample 1.2 with oil, the latter decreases the pressure when it does not report VJ

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s with the discharge chamber 5. The pressure in the sample 12 decreases as a result of its communication through the bypass channels 9 and 15 with the suction chamber 4 into which part of the oil entering the sample 12 is sucked in. As a result of a decrease in the effect of the pressure of the pumped gas on the supply to the chamber 1. A vacuum pump containing a housing with channels for supplying and discharging a working medium, an oil chamber and a working cylinder, in which an eccentric shaft with a plunger, a shank installed on it, is placed with the formation of suction and discharge chambers the latter is placed in a guide having a sample periodically in communication with the discharge chamber, a throttle channel is made in the housing, and the guide is placed in the housing with the possibility of angular movement and periodic communication of the sample with the oil chamber at the time of separation of the sample with the discharge chamber, from moreover, and in order to reduce the demand for pumping 5 oil and as a result of sucking it from the sample 12 by the suction chamber 4, the lubrication conditions of the rotor mechanism are improved and conditions are created under which both pechivaets high degree of degassing of oil.

By increasing power, increasing productivity and creating a vacuum, bypass channels are made in the guide and shank of the plunger with the possibility of periodic communication of the suction chamber with a sample.

2. The pump according to claim 1, wherein the bypass channels are configured to communicate the suction chamber with a sample at the time of its separation from the discharge chamber with the throttle channel blocked.

3. A pump according to claim 1, characterized in that the bypass channels are arranged to communicate with the suction chamber with a sample at the moment of its communication with the oil chamber.