CN102788019A

CN102788019A - Rotary compressor

Info

Publication number: CN102788019A
Application number: CN2011101257086A
Authority: CN
Inventors: 孙义祥
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Midea Toshiba Compressor Corp; Guangdong Meizhi Compressor Co Ltd
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2012-11-21

Abstract

The invention relates to a rotary compressor, which comprises a motor assembly and a pump assembly, wherein the motor assembly and the pump assembly are arranged inside a housing, and the motor assembly is arranged above the pump assembly. The motor assembly comprises a stator and a rotor. The pump assembly comprises a cylinder, an elliptical piston arranged inside the cylinder, slide sheets arranged inside cylinder slide sheet grooves, a rotation shaft for driving the elliptical piston to rotate, a main bearing and a sub-bearing, wherein the main bearing and the sub-bearing are arranged on an upper side and a lower side of the cylinder. A center line of the elliptical piston and a center line of the cylinder cavity are overlapped. The two slide sheet grooves are arranged, each slide sheet groove is provided with the slide sheet, and one end of the slide sheet contacts the outer periphery of the elliptical piston. During compressor operation, the end portion of the slide sheet is tightly close to the outer periphery of the elliptical piston. The rotary compressor of the present invention has characteristics of simple and reasonable structure, smooth and reliable operation, and low vibration noise.

Description

Rotary compressor

Technical field

The present invention relates to a kind of rotary compressor.

Background technique

The bent axle cam part of existing rotary compressor adopts eccentric structure to realize compression, but this eccentric structure can produce very big unbalanced force in operation process, cause vibration of compressor.The way of taking now is in the two ends of rotor of compressor equilibrium block to be installed; With realizable force balance and equalising torque, but receive accuracy of manufacturing and influence of mounting accuracy, can not eliminate unbalanced force and unbalance moment fully; And the power of equilibrium block and bent axle generation is not because on same straight line; Can make bent axle produce bending deflection, cause bearing wear serious, even influence stator and gap between rotor.

Chinese patent document number CN1632310 discloses a kind of rotary compressor on June 29th, 2005, comprising: cylinder; Perforation is pressed into fixed crankshaft in the inside of rotor; Support the upper bearing and the lower bearing of bent axle; Be provided with the bent axle symmetric between upper bearing and the lower bearing, the bent axle symmetric is a bilateral symmetry shape, is designed to elliptical shape with rolling the ring joining part, guarantees and roll ring to fit tightly; Roll the outer circumferential face that the contact of ring inner face is located at bent axle symmetric one end; Roll the ring outer rim and be designed to ellipse; Two end points and the cylinder of its major axis contact, and roll that ring is inner to be designed to be complementary with axisymmetric shape with bent axle symmetric joining part, and itself and bent axle symmetric are fitted tightly; Roll the inner face that ring periphery ellipsoid is contacted with cylinder, do revolution motion through the rotation drive of symmetric.But the ellipse of this structure rolls ring is divided into both sides with cylinder inner cavity, and the cavity that wherein rolls ring one side is split up into air aspiration cavity and exhaust cavity by a slide plate, and the cavity that rolls the ring opposite side then slatterns, and reduces air-conditioner efficiency.

Summary of the invention

The object of the invention aims to provide a kind of simple and reasonable, rotary compressor reliable, that vibration noise is low that operates steadily, to overcome deficiency of the prior art.

A kind of rotary compressor by this purpose design comprises the electric machine assembly and the pump assembly that are arranged in the housing, and electric machine assembly is arranged on the top of pump assembly, and electric machine assembly comprises stator and rotor; Its structure characteristic be pump assembly comprise cylinder, be arranged on cylinder inner cavity oval piston, be arranged on slide plate in the cylinder vane slot, drive the rotating shaft of oval piston rotation, and be arranged on the cylinder main bearing and the supplementary bearing of both sides up and down; The center line of said oval piston and the center line of cylinder inner cavity are overlapping; Said vane slot is provided with two, is provided with slide plate in each vane slot, and slide plate one end contacts with the oval piston periphery.During compressor operation, the periphery of oval piston is close in the slide plate end.

Said oval piston and rotating shaft are one-body molded, and both constitute a bent axle, and oval piston is the elliptic cam of bent axle; Elliptic cam is positioned at the bottom of bent axle, and its center line and crankshaft rotating center line are overlapping; Elliptic cam outer wall and cylinder inner wall Spielpassung.Said gap leans on oil film seal with lubricated.

Said elliptic cam edge is provided with oval-shaped boss, and boss contacts with supplementary bearing with main bearing respectively both sides up and down, and the elliptic cam downside is provided with shaft shoulder thrust surface, and bent axle is bearing on the supplementary bearing through shaft shoulder thrust surface.

Said boss protrudes from the side up and down of elliptic cam; Shaft shoulder thrust surface protrudes from the downside of boss.Both sides are higher than elliptic cam up and down for boss, contact with the major-minor bearing, prevent gas leakage.Shaft shoulder thrust surface is slightly higher than boss, plays thrust and carries rotor weight.

Said slide plate and elliptic cam are with being divided into four cavitys in the cylinder; Comprise first air aspiration cavity, second air aspiration cavity, first exhaust cavity and second exhaust cavity; Corresponding respectively first, second air aspiration cavity of cylinder is provided with suction port; Corresponding respectively first, second exhaust cavity of cylinder is provided with exhaust port.

Said two suction ports, two exhaust ports, two vane slots are symmetric arrangement respectively; Suction port and exhaust port lay respectively at the slide plate both sides.

The independent machine shaping of said oval piston and rotating shaft, the oval piston radial location is arranged on the rotating shaft bottom; Oval piston outer wall and cylinder inner wall Spielpassung.

The elliptical shape of above-mentioned oval piston or elliptic cam, its major diameter and minor axis can be provided with arbitrarily according to actual needs.

The present invention is designed to ellipse with the cam (or piston) of bent axle, on cylinder, designs two suction ports, two exhaust ports and two vane slots simultaneously, utilizes elliptic cam and two slide plates that cylinder is divided into four cavitys; When the counterclockwise high speed rotating of driven by motor rotating shaft, elliptic cam also rotates, and two air aspiration cavitys are air-breathing; Two exhaust cavity compression refrigerant gases; When reaching certain pressure, exhaust valve plate is opened, and pressurized gas are discharged from the exhaust port of cylinder.In air-breathing and compression process, slide plate is close to the elliptic cam periphery, realizes the isolation of air aspiration cavity and exhaust cavity.In addition, elliptic cam is a symplex structure, does not have unbalanced force, thereby has reached the purpose that reduces vibration, simultaneously, can also save existing epitrochanterian equilibrium block, reduce cost.It is simple and reasonable, operate steadily reliable, vibration noise is low.

Description of drawings

Fig. 1 is one embodiment of the invention structural representation.

Fig. 2 looks up structural representation for pump assembly.

Fig. 3 looks up structural representation for cylinder.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

Referring to Fig. 1-Fig. 3, this rotary compressor comprises the electric machine assembly and the pump assembly that are arranged in the housing, and electric machine assembly is arranged on the top of pump assembly, and electric machine assembly comprises stator and rotor.Pump assembly comprises cylinder 6, is arranged on the oval piston of cylinder 6 inner chambers, is arranged on the slide plate 3 in cylinder 6 vane slots 6.1, the rotating shaft of driving oval piston rotation, and the main bearing 2 and supplementary bearing 4 that are arranged on cylinder both sides about in the of 6; The center line of the center line of said oval piston and cylinder 6 inner chambers is overlapping; Said vane slot 6.1 is provided with two, is provided with slide plate 3 in each vane slot 6.1, and slide plate 3 one ends contact with the oval piston periphery.Oval piston and rotating shaft are one-body molded, and both constitute a bent axle 1, and oval piston is the elliptic cam 5 of bent axle 1; Elliptic cam 5 is positioned at the bottom of bent axle 1, its center line and bent axle 1 rotating center line overlap; Elliptic cam 5 outer walls and cylinder 6 inwall Spielpassung.

Elliptic cam 5 edges are provided with oval-shaped boss 5.1, and boss contacts with supplementary bearing 4 with main bearing 2 respectively both sides about in the of 5.1, and elliptic cam 5 downsides are provided with shaft shoulder thrust surface 5.2, and bent axle 1 is bearing on the supplementary bearing 4 through shaft shoulder thrust surface 5.2.Boss 5.1 protrudes from the side up and down of elliptic cam 5; Shaft shoulder thrust surface 5.2 protrudes from the downside of boss 5.1.

Slide plate 3 and elliptic cam 5 are with being divided into four cavitys in the cylinder 6; Comprise the first air aspiration cavity I, the second air aspiration cavity III, the first exhaust cavity II and the second exhaust cavity IV; Corresponding respectively first, second air aspiration cavity of cylinder is provided with suction port 6.2; Corresponding respectively first, second exhaust cavity of cylinder is provided with exhaust port 6.3.Two suction ports 6.2, two exhaust ports 6.3, two vane slots 6.1 are symmetric arrangement respectively; Suction port 6.2 lays respectively at slide plate 3 both sides with exhaust port 6.3.

Claims

1. a rotary compressor comprises the electric machine assembly and the pump assembly that are arranged in the housing, and electric machine assembly is arranged on the top of pump assembly, and electric machine assembly comprises stator and rotor; It is characterized in that pump assembly comprise cylinder (6), be arranged on cylinder (6) inner chamber oval piston, be arranged on slide plate (3) in cylinder (6) vane slot (6.1), drive the rotating shaft of oval piston rotation, and be arranged on cylinder (6) main bearing of both sides (2) and supplementary bearing (4) up and down; The center line of the center line of said oval piston and cylinder (6) inner chamber is overlapping; Said vane slot (6.1) is provided with two, is provided with slide plate (3) in each vane slot (6.1), and slide plate (3) one ends contact with the oval piston periphery.

2. rotary compressor according to claim 1 is characterized in that said oval piston and rotating shaft are one-body molded, and both constitute a bent axle (1), and oval piston is the elliptic cam (5) of bent axle (1); Elliptic cam (5) is positioned at the bottom of bent axle (1), its center line and bent axle (1) rotating center line overlap; Elliptic cam (5) outer wall and cylinder (6) inwall Spielpassung.

3. rotary compressor according to claim 2; It is characterized in that said elliptic cam (5) edge is provided with oval-shaped boss (5.1); Boss (5.1) both sides up and down contacts with supplementary bearing (4) with main bearing (2) respectively; Elliptic cam (5) downside is provided with shaft shoulder thrust surface (5.2), and bent axle (1) is bearing on the supplementary bearing (4) through shaft shoulder thrust surface (5.2).

4. rotary compressor according to claim 3 is characterized in that said boss (5.1) protrudes from the side up and down of elliptic cam (5); Shaft shoulder thrust surface (5.2) protrudes from the downside of boss (5.1).

5. according to each described rotary compressor of claim 2-4, it is characterized in that said slide plate (3) and elliptic cam (5) are with being divided into four cavitys in the cylinder (6); Comprise first air aspiration cavity (I), second air aspiration cavity (III), first exhaust cavity (II) and second exhaust cavity (IV); Corresponding respectively first, second air aspiration cavity of cylinder is provided with suction port (6.2); Corresponding respectively first, second exhaust cavity of cylinder is provided with exhaust port (6.3).

6. rotary compressor according to claim 5 is characterized in that said two suction ports (6.2), two exhaust ports (6.3), two vane slots (6.1) symmetric arrangement respectively; Suction port (6.2) and exhaust port (6.3) lay respectively at slide plate (3) both sides.

7. rotary compressor according to claim 1 is characterized in that the independent machine shaping of said oval piston and rotating shaft, and the oval piston radial location is arranged on the rotating shaft bottom; Oval piston outer wall and cylinder (3) inwall Spielpassung.