SU989144A1

SU989144A1 - Vacuum pump

Info

Publication number: SU989144A1
Application number: SU813278586A
Authority: SU
Inventors: Николай Петрович Яненков
Original assignee: Предприятие П/Я А-1614
Priority date: 1981-04-16
Filing date: 1981-04-16
Publication date: 1983-01-15

Description

(5) ВАКУУМНЫЙ НАСОС(5) VACUUM PUMP

1one

Изобретение относитс к вакуумной технике, в мастностм к конструкции пластинчато-роторных вакуумных насосов с масл ным уплотнением.The invention relates to vacuum technology, in accordance with the design of rotary vane vacuum pumps with oil compaction.

Известен вакуумный насос с масл H iM уплотнением, содержащий корпус с отверсти ми дл подвода и отвода откачиваемой среды и цилиндрической рабочей камерой, в которой эксцентрично установлен ротор с расположенными в его пазах лопатками, имеющими торцовые полости.ii . A vacuum pump with an oil H iM seal is known, comprising a housing with openings for supplying and discharging the pumped medium and a cylindrical working chamber in which the rotor is installed eccentrically with blades located in its grooves having end cavities. Ii.

Недостатком такого вакуумного насоса вл етс высокое остаточное давление и значительный уровень шума, создаваемый лопатками, удар ющимис о рабочую поверхность камеры.The disadvantage of such a vacuum pump is the high residual pressure and the significant noise level generated by the blades hitting the working surface of the chamber.

Цель изобретени - уменьшение уровн шума и снижение полного остаточного давлени .The purpose of the invention is to reduce the noise level and decrease the total residual pressure.

Поставленна цель достигаетс тем, что в вакуумном насосе с масл ным уплотнением, содержащем корпус с отверсти ми дл подвода и отвода откачиваемой среды и цилиндрическую рабочую, камеру, в которой эксцентрично установлен ротор с расположенными в его пазах лопатками, имеющими торцовые полости, в лопатках между отверсти ми дл отвода откачиваемой среды выполнены радиальные каналы, открытые . со стороны цилиндрической поверхности камеры и смещенные относительно от лопаток в сторону вращени ротора, и сообщенный с радиальными каналами продольный канал.This goal is achieved by the fact that in a vacuum pump with oil seal, comprising a housing with openings for supplying and discharging the pumped medium and a cylindrical working chamber, in which the rotor with the blades located in its grooves with end cavities eccentrically mounted openings for removal of the pumped medium are made of radial channels open. from the side of the cylindrical surface of the chamber and offset from the blades in the direction of rotation of the rotor, and a longitudinal channel in communication with the radial channels.

В каждой лопатке со стороны, обра|щенной к дну паза, выполнены выемка м сообщенные с ней и продольным каналом радиальные отверсти , расположенные между радиальными каналами.In each blade, from the side facing the bottom of the groove, were made a notch and radial holes communicated with it and the longitudinal channel located between the radial channels.

Claims

FIG. 1 shows a vacuum pump, a longitudinal section; FIG. 2 section A-A in FIG. one; in fig. 3 section bb in fig. 2; in fig. 3989 section of the blade along the canals, longitudinal section. A vacuum pump with an oil seal includes a housing 1 with openings 2 and 3 for supplying and discharging from the pumping medium and a cylindrical working chamber in which the rotor 5 is mounted eccentrically with 6 blades 7 having end cavities 8 in its grooves 8. In the blades 7 Between the holes 3, radial channels 9 open on the side of the cylindrical surface of chamber k and offset from the axis of the blades 7 in the direction of rotation of the rotor 5 and communicated with the radial channels E of the longitudinal channel 10 are made to drain the pumped-out medium. th blade 7 on the side facing the bottom of the groove b are formed a recess 11 therein and communicated with the longitudinal bore 10 and radial openings 12 disposed between the radial channels 9Na output holes 3 installed valve 13Vakuumny pump operates are following manner. Through the channels 9, the working fluid enters the channel 10. From the channel 10, the working fluid enters the cavity 8, providing lubrication and sealing of the ends of the Blades 7. From the channel 10, the working fluid also flows through the radial holes 12 into the notch 11. The working fluid in the notch 11 fluid during operation of the pump. and under the action of centrifugal forces ensures the constant presence of working fluid in the radial holes 12, thereby forming a hydraulic shutter, which prevents pumping of the pumped fluid. When the blade leaves the maximum compression cavity, the blade does not hit the working surface of the chamber and knock, this pump eliminates the flow from the low-vacuum (discharge) cavity to the high-vacuum (suction) and reduces the noise level. Claim 1. Vacuum pump with oil seal, comprising a housing with a distortion for supplying and discharging the pumped medium and a cylindrical working chamber in which the rotor with the blades located in its grooves, having the end cavities eccentrically mounted, has in order to reduce the noise level and reduce the total residual pressure, in the blades between the holes for the removal of the evacuating medium, radial channels are made open on the side of the cylindrical surface of the chamber and offset from a blade axis in the direction of rotation of the rotor, and the radial channels communicating with the longitudinal channel.

2. The pump according to claim 1, which also means that in each lobe from the side facing the bottom of the groove there is a notch and radial holes between it and the longitudinal channel located between the radial channels. Sources of information taken into account in the examination 1. Patent of Germany, No. 1172397/27 from 6/01, published. 1965.