CN220151501U - Pressure balancing device for swing compressor and swing compressor - Google Patents

Abstract

The utility model relates to the field of automobile air conditioner compressors, in particular to a pressure balancing device for a swing type compressor, which comprises a front cover and a cylinder body; the cylinder body comprises a medium-pressure cavity, a piston cavity, an air suction cavity and an air discharge cavity; the front cover comprises a bearing cavity, is connected to one side of the medium-pressure cavity of the cylinder body and separates the bearing cavity from the medium-pressure cavity; a bearing hole is arranged between the bearing cavity and the medium pressure cavity; an oil guide channel which is obliquely upwards connected to the medium pressure cavity from the bearing cavity is arranged in the front cover; an air guide channel is arranged between the medium pressure cavity and the air suction cavity of the cylinder body; the air guide channels are positioned in gaps of the plurality of piston cavities and are horizontally arranged. The utility model also provides a swinging type compressor. According to the utility model, by adjusting the pressure balance state between the medium-pressure cavity and the air suction cavity, the flow of the frozen oil of the swing type fixed-displacement compressor is greatly reduced, the internal lubrication of the internal oil storage of the swing type fixed-displacement compressor is improved, and the service life of the swing type fixed-displacement compressor is prolonged.

Description

Pressure balancing device for swing compressor and swing compressor

Technical Field

The utility model relates to the field of automobile air conditioner compressors, in particular to a pressure balancing device for a swing type compressor and the swing type compressor.

Background

At present, swing type fixed displacement compressors are widely adopted as air conditioner compressors in the domestic automobile industry. An external oil guide pipe is arranged between the front cover and the cylinder body, is directly connected with the air suction cavity and the shaft seal, supplies oil to the shaft seal, and does not pass through the medium pressure cavity. The front cover is connected with the oil guide pipe hole of the cylinder body through the oil guide pipe, so that oil is supplied to the front cover shaft seal, and the pressure balance of the medium pressure cavity and the air suction cavity is indirectly maintained. However, when the swing type five-cylinder fixed displacement compressor is used, the pressure difference between the medium pressure cavity and the suction cavity is too large, and the pressure balance cannot be ensured by means of the external oil guide pipe, so that the pressure of the medium pressure cavity is higher than that of the suction cavity, and the usability of the swing type five-cylinder fixed displacement compressor is affected.

Disclosure of Invention

The utility model aims to provide a pressure balancing device for a swing type compressor and the swing type compressor, which are used for overcoming the defects existing in the prior art.

The utility model provides a pressure balancing device for a swing type compressor, which is characterized by comprising a front cover and a cylinder body; the cylinder body comprises a medium-pressure cavity, a piston cavity, an air suction cavity and an air discharge cavity; the front cover comprises a bearing cavity, is connected to one side of the medium pressure cavity of the cylinder body and separates the bearing cavity from the medium pressure cavity; a bearing hole is arranged between the bearing cavity and the medium pressure cavity; an oil guide passage connected obliquely upward from the bearing chamber to the medium pressure chamber is provided in the front cover; an air guide channel is arranged between the medium-pressure cavity and the air suction cavity of the cylinder body; the air guide channels are positioned in gaps of the piston cavities and horizontally arranged.

Further, at one side of the medium pressure chamber, the oil guide passage is opened at the periphery of the bearing hole.

Further, the oil guide channels are multiple.

Further, the oil guide channels are arranged above the bearing holes and are symmetrically arranged left and right.

Further, the included angle between the oil guide channel and the central line is 45 degrees.

Further, the diameter of the oil guide channel is preferably 3 mm; the oil guide channel is upwards arranged from the bearing cavity at an angle of 35 degrees and finally is opened in the medium-pressure cavity.

Further, the air guide channel is positioned at the upper part of the inner side of the cylinder body.

Further, the diameter of the air guide passage is preferably 3 mm.

The utility model also provides a swing type compressor, which uses the pressure balancing device for the swing type compressor, and is characterized by comprising the front cover, the cylinder body, the sloping cam plate, the connecting body, the piston, the bearing and the main shaft; the bearing is arranged in the bearing cavity; the main shaft is sleeved in the bearing and connected to the swash plate through the bearing hole; the connecting body is fixed on the sloping cam plate; the pistons are sleeved in the piston cavity, one end of each piston is connected to the connecting body, and the other end of each piston is provided with an air suction cavity and an air discharge cavity; the front cover is provided with the oil guide channel, and the cylinder body is provided with the air guide channel.

Further, a gap for relative rotation is provided between the swash plate and the connecting body.

According to the pressure balancing device for the swing type compressor and the swing type compressor, the through holes are formed in the front cover, the two inclined holes are formed in the front cover, the shaft seal is supplied with oil, and the through holes are formed in the cylinder body, so that the pressure balancing state between the medium-pressure cavity and the air suction cavity is effectively controlled, the leakage of refrigerating oil of the swing type fixed-displacement compressor to the air discharge cavity is greatly reduced, the internal lubrication of the swing type fixed-displacement compressor is improved, and the service life of the swing type fixed-displacement compressor is prolonged

Drawings

FIG. 1 is a schematic view of a preferred embodiment of a pressure balancing apparatus for a wobble compressor according to the present utility model;

FIG. 2 is a cross-sectional view of a front cover in a preferred embodiment of a pressure balancing apparatus for a wobble compressor in accordance with the utility model;

FIG. 3 is a schematic view of the oil guide channel of FIG. 2;

FIG. 4 is a cross-sectional view of a cylinder in a preferred embodiment of the pressure balancing apparatus for a wobble compressor of the present utility model;

FIG. 5 is a schematic view of the air guide channel of FIG. 4;

fig. 6 is a schematic structural view of a preferred embodiment of the present utility model for a wobble compressor.

Wherein, the front cover is 1-and the cylinder body is 2-; 3-swash plate, 4-connector, 5-piston, 6-bearing and 7-main shaft;

11-bearing cavity, 12-oil guide channel;

21-medium pressure cavity, 22-piston cavity, 23-suction cavity, 24-exhaust cavity and 25-air guide channel.

Description of the embodiments

Specific embodiments of the present utility model will be described below with reference to the accompanying drawings.

Examples

Referring to fig. 1 to 5, the present utility model discloses a pressure balancing device for a swing compressor, which is composed of a front cover 1 and a cylinder 2.

The cylinder 2 is divided into a plurality of chambers, namely a medium pressure chamber 21, a piston chamber 22, an air suction chamber 23 and an air discharge chamber 24.

One side of the front cover 1 is a bearing end, a bearing cavity 11 is arranged for installing a bearing, and the other side is a plane end. The planar end of the front cover 1 is attached to one side of the cylinder body 2 close to the medium pressure cavity 21. Bearing holes are provided in the bearing chamber 11 in the front cover 1, the openings of which are respectively in the bearing chamber 11 and the medium pressure chamber 21.

An oil guide channel 12 for connecting the bearing cavity 11 and the medium pressure cavity 21 is arranged in the front cover 1, and the frozen oil passes through the through hole and directly supplies oil to the shaft seal from the medium pressure cavity 21 to lubricate the bearing cavity 11. The oil guide channels 12 are arranged in two in total and inclined at 35 degrees, the low end of the oil guide channels is opened in the bearing cavity 11, and the high end of the oil guide channels is opened in the medium-pressure cavity 21. The openings of the two oil guide channels 12 in the medium-pressure cavity 21 are positioned at the periphery of the upper side of the bearing hole, are symmetrically arranged left and right, have an included angle of 45 degrees with the central line and have a diameter of 3 mm.

An air guide passage 25 is provided between the intermediate pressure chamber 21 and the suction chamber 23 of the cylinder 2. The air guide passage 25 is horizontally arranged in the gap of the piston chamber 22. The diameter of the air guide channel 25 is 3 mm, only one air guide channel is needed to be arranged on the upper half area of the whole cylinder body 2, and the air guide channel is positioned between different piston cavities 22 near the upper part of the inner side of the cylinder body, and can be arranged at the upper left side or the upper right side.

Referring to fig. 6, the present utility model also discloses a swing type compressor using the pressure balancing device for the swing type compressor, which comprises a front cover 1, a cylinder block 2, a swash plate 3, a connecting body 4, a piston 5, a bearing 6 and a main shaft 7. It compresses the build-up pressure by driving the piston 5 of the fixed displacement compressor against the connecting rod of the outer piston assembly.

The bearing 6 is mounted in a bearing cavity 11 of the front cover 1. The main shaft 7 is sleeved on the bearing 6 and is connected with the driving swash plate 3 through a bearing hole. The connecting body 4 is connected to the swash plate 3. The swash plate 3 and the connecting body 4 are connected through pins, and a gap for relative rotation is arranged between the swash plate 3 and the connecting body, so that pressure balance between the medium-pressure cavity and the suction cavity is ensured. When the swash plate 3 is rotated by the bearings, the rotational motion is converted into a reciprocating motion, pushing the pistons 5 connected thereto to reciprocate. And the piston 5 is sleeved in the piston cavity, one end of the piston 5 is connected to the connecting body 4, and the other end is an air suction cavity and an air exhaust cavity. When the piston 5 is pumping, the suction chamber 23 is depressurized and gas enters the suction chamber 23. At this time, the gas in the intermediate pressure chamber 21 enters the suction chamber 23 through the gas guide passage 25, thereby balancing the pressure, and reducing the possibility of the refrigerant oil leaking from the intermediate pressure chamber 21 to the discharge chamber 24. When the piston 5 compresses, gas is discharged from the discharge chamber 24. Meanwhile, when the 7 main shaft drives the swash plate 3 to rotate, the refrigerating oil is driven to splash, and enters the bearing cavity 11 through the oil guide channel 12 on the front cover 1 to supply oil for shaft seal assembly.

The foregoing description is merely illustrative of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model. Equivalent changes and modifications are intended to be within the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A pressure balancing device for a rocking compressor, comprising a front cover and a cylinder; the cylinder body comprises a medium-pressure cavity, a piston cavity, an air suction cavity and an air discharge cavity; the front cover comprises a bearing cavity, is connected to one side of the medium pressure cavity of the cylinder body and separates the bearing cavity from the medium pressure cavity; a bearing hole is arranged between the bearing cavity and the medium pressure cavity; an oil guide passage connected obliquely upward from the bearing chamber to the medium pressure chamber is provided in the front cover; an air guide channel is arranged between the medium-pressure cavity and the air suction cavity of the cylinder body; the air guide channels are positioned in gaps of the piston cavities and horizontally arranged.

2. The pressure balancing apparatus for a swing compressor according to claim 1, wherein the oil guide passage is opened at a periphery of the bearing hole at a side of the intermediate pressure chamber.

3. The pressure equalization apparatus for a pendulum compressor of claim 1 wherein said oil guide passage is a plurality.

4. A pressure balancing apparatus for a swing compressor according to claim 3, wherein the oil guide passage is located above the bearing hole, and is arranged in bilateral symmetry.

5. The pressure equalization apparatus for a pendulum compressor of claim 4 wherein said oil conduit is angled at 45 degrees to the centerline.

6. The pressure balancing apparatus for a swing compressor according to claim 1, wherein the diameter of the oil guide passage is 3 mm; the oil guide channel is upwards arranged from the bearing cavity at an angle of 35 degrees and finally is opened in the medium-pressure cavity.

7. The pressure balancing apparatus for a swing compressor according to claim 1, wherein the air guide passage is located at an upper portion inside the cylinder.

8. The pressure equalization apparatus for a pendulum compressor of claim 7 wherein said air guide passage has a diameter of 3 millimeters.

9. A swing type compressor using the pressure balancing apparatus for a swing type compressor according to claim 1, comprising the front cover, the cylinder block, a swash plate, a connecting body, a piston, a bearing, and a main shaft; the bearing is arranged in the bearing cavity; the main shaft is sleeved in the bearing and connected to the swash plate through the bearing hole; the connecting body is fixed on the sloping cam plate; the pistons are sleeved in the piston cavity, one end of each piston is connected to the connecting body, and the other end of each piston is provided with an air suction cavity and an air discharge cavity; the front cover is provided with the oil guide channel, and the cylinder body is provided with the air guide channel.

10. The wobble compressor of claim 9, wherein a relatively rotatable gap is provided between the swash plate and the connection body.