RU2014508C1 - Rotary compressor - Google Patents

Abstract

FIELD: rotary compressors. SUBSTANCE: holes in the end plates are made at r_hole at distance of R_rot from axis of bore at angle of shaft turn of φ₃ which are determined by the relationship given in the Description. EFFECT: enhanced efficiency. 2 dwg

Description

 The invention relates to compressor engineering, namely to rotary compressors.

 Known rotary compressors with the supply of cutting fluid (coolant) in the compression process (Germany patent N 1428236, CL F 04 C 25/02, Japan patent N 60-35195, CL F 04 C 29/02).

 The disadvantage of these compressors is the increase in energy consumption caused by the creation of overpressure to provide coolant in the compression process.

The closest to the invention in technical essence and the achieved positive effect is a rotary compressor. The working chamber which through holes in the end cap, due to pressure difference, lubricant is supplied rotation angles ^of shaft 280-290 and spaced from the axis of the cylinder, equal 0,9-0,94 Rts, at the moment of equality temperature liquefied gas and injected oils.

The disadvantage of this compressor is its low efficiency, due to the narrow range (from 210-360 ^about rotation of the rotor from the axis of the separation plate) of the working capacity of the opening for supplying lubricating-cooling oil to the working cavity of compressors with a small pressure drop.

 The aim of the invention is to increase the efficiency of the duty cycle of a rotary compressor by increasing the oil supply to the working chambers.

- e

- r_o;
φ₃= Π +

, где r_о - радиус отверстий;
R - радиус ротора;
е - эксцентриситет;
φ₁ - угол поворота ротора, обеспечивающий перекрытие ротором канала подвода рабочей среды;
φ₂ - угол поворота ротора, при котором давление в камере нагнетания равно давлению на выходе из канала отвода рабочей среды.This goal is achieved by the fact that in the end caps of the rotary compressor holes are made with a radius of rо for supplying cooling oil to the compression process under the action of discharge pressure. The holes are made at a distance R _p from the axis of the bore and at the angle of rotation of the shaft φ ₃ , determined by the following relationships:
R _p =

- e

- r _o ;
φ ₃ = Π +

where r _o is the radius of the holes;
R is the radius of the rotor;
e - eccentricity;
φ ₁ - the angle of rotation of the rotor, providing a rotor blocking the channel for supplying a working medium;
φ ₂ - the angle of rotation of the rotor, at which the pressure in the discharge chamber is equal to the pressure at the outlet of the channel for removal of the working medium.

 In FIG. 1 schematically shows a section through a compressor, an oil tank and a heat exchanger; in FIG. 2 - geometric location of the hole.

и на расстоянии r-rо от оси расточки, где φ₁ - угол поворота ротора, обеспечивающий перекрытие ротором канала подвода рабочей среды; φ₂ - угол поворота ротора, при котором давление в камере нагнетания равно давлению на выходе из канала отвода рабочей среды;
r =

- e

.A rotary compressor, in which the supply of cooling oil to the working cavity is established, and containing a cylinder 1 with a groove 2, in which a plate 3 is moved back and forth, having continuous contact with the rotor 4 located on the eccentric shaft 5, and the covers 6 at the ends of the cylinder 1 in which openings 7 with radius rо are located, connected to the oil tank 8, for supplying cooling oil 9 to the compression process, centered at the angle of rotation φ ₃ = π +

and at a distance of r-rо from the axis of the bore, where φ ₁ is the angle of rotation of the rotor, providing the rotor closes the channel for supplying a working medium; φ ₂ - the angle of rotation of the rotor, at which the pressure in the discharge chamber is equal to the pressure at the outlet of the channel for removal of the working medium;
r =

- e

.

 The compressor operates as follows.

 When the eccentric shaft 5 rotates, the rotor 4 is run around the inner generatrix of the cylinder 1 in a volume limited by the end caps 6. The spring plate 3 slides into the groove 2 of the cylinder 1 and divides the working chamber into the suction and discharge cavities. From the injection cavity, the compressed gas is supplied to the oil tank 8, where the oil 9 is separated. In this case, from the oil tank 8, the cooling oil 9 through the opening 7 enters the compression process.

 The hole 7 is located in such a way that its opening by the rotor 4, which is rolled around the cylinder 1, occurs after the rotor closes the channel for supplying the working medium, and the opening of the hole 7 is closed earlier or during pressure equalization in the injection cavity and in the oil tank 8.

Claims (1)

A ROTARY COMPRESSOR, comprising a housing with a profiled bore, channels for supplying and discharging the working medium and a radial groove, a rolling rotor installed in the groove on the eccentric shaft, placed in the groove with the formation of working suction and discharge chambers, a separation plate and end caps with holes for oil supply, characterized the fact that, in order to increase the efficiency of the compressor working cycle by increasing the oil supply to the working chambers, the oil supply openings are made at a distance R _p from the axis of the bore and the angle of rotation of the shaft φ ₃ , determined by the following relationships:
R _p =

- e;
φ ₃ = π + (φ ₁ + φ ₂ ) ˙ ₂ ;
where r _o is the radius of the holes;
R is the radius of the rotor;
e is the eccentricity;
φ ₁ - the angle of rotation of the rotor, providing a rotor blocking the channel for supplying a working medium;
φ ₂ - the angle of rotation of the rotor, at which the pressure in the discharge chamber is equal to the pressure at the outlet of the channel for removal of the working medium.

Images