CN106368947A - Totally-closed scroll compressor in elastic contact seal - Google Patents

Abstract

The invention discloses a fully enclosed scroll compressor with elastic contact seal. The invention includes a fixed scroll, a corrugated spring, a rotating scroll, an Oldham coupling ring, a suction pipe, a cross groove, a radial spring, and a positioning block; the positioning ring is an annular structure, and the outer edge is pressed into the casing and It is closely fixed with the casing, and the side of the axial direction facing the fixed scroll is uniformly provided with a groove, and a corrugated spring is placed in the groove; the outer edge of the positioning block is welded to the casing, and it is provided with a radial groove, the groove Radial springs are placed inside. The invention utilizes the corrugated spring in the groove of the positioning ring to automatically eliminate the axial gap, the radial spring in the groove of the positioning block automatically eliminates the radial gap, and always maintains the axial and radial contact between the fixed scroll and the rotating scroll, eliminating Gas leakage, increase volumetric efficiency, improve the operating performance of refrigeration compressors, reduce costs and save energy.

Description

Hermetic scroll compressor with elastic contact seal

technical field

The invention relates to the technical field of refrigeration compressors for refrigeration and air conditioning, and relates to an elastic contact-sealed hermetic scroll compressor.

Background technique

The excellent performance of the hermetic scroll refrigeration compressor makes it more and more widely used in the field of refrigeration and air conditioning. The key factors affecting the volumetric efficiency of the hermetic scroll refrigeration compressor are leakage, the radial leakage caused by the axial gap between the two tooth tops and the bottom of the orbiting scroll and the fixed scroll, and the orbiting scroll The radial gap between the disk and the fixed scroll produces circumferential leakage, and the usual sealing measures are complicated in processing technology. If the sealing structure for reducing the axial gap and radial gap is set on the side of the fixed scroll, and it has an elastic automatic The compensation function can eliminate the fit gap between the orbiting scroll and the fixed scroll, improve the volumetric efficiency, increase the gas delivery, and improve the performance of the scroll refrigeration compressor. But do not propose the technical scheme of concrete implementation yet at present.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a fully enclosed scroll refrigeration compressor with elastic automatic compensation function, which eliminates the matching gap between the orbiting scroll and the fixed scroll, and improves Volumetric efficiency, increase gas transmission capacity, improve the performance of scroll refrigeration compressors, reduce investment, protect the environment and save energy.

A fully-enclosed scroll compressor with elastic contact seal, including a fixed scroll, a corrugated spring, a positioning ring, a casing, a rotating scroll, an Oldham coupling ring, a motor stator, a motor rotor, a main shaft, a frame, a radial spring, positioning block;

The positioning ring is a ring structure, the outer edge is pressed into the casing and tightly fixedly fitted with the casing, the side of the axial direction facing the fixed scroll is uniformly provided with an axial groove, and a corrugated spring is placed in the axial groove; positioning The outer edge of the block is welded to the casing, the positioning block is provided with a radial groove, and a radial spring is placed in the radial groove; the top of the fixed scroll contacts and cooperates with the corrugated spring in the groove of the positioning ring, and the fixed scroll The outer circle on one side of the positioning block is in contact with the radial spring in the radial groove of the positioning block; the fixed scroll and the orbiting scroll are meshed with a phase difference of 180 degrees, and the top of the spiral tooth of the fixed scroll is in contact with the orbiting scroll The inner side of the chassis of the rotating disk is in contact, the inner surface of the chassis of the fixed scroll is in contact with the top surface of the spiral teeth of the rotating scroll, and forms the outermost suction space on the axis, and the innermost layer communicates with the exhaust hole There are three pairs of studios in the exhaust space and the compression space in the middle;

The ring body of the cross coupling ring is cross-symmetrical with a boss, the base is provided with two symmetrical base grooves, and the orbiting scroll is provided with two symmetrical orbiting scroll grooves. The base groove and the orbiting scroll The disc grooves are distributed in a cross position, and the bosses of the Oldham coupling ring are respectively in contact with the groove of the base at the lower part and the groove of the orbiting scroll at the upper part, and the base is connected with the orbiting scroll through the Oldham coupling ring , the rotation of the main shaft drives the rotating scroll to rotate, so that the volume of each working chamber becomes smaller from the outside to the inside, so as to achieve the purpose of suction, compression and exhaust. The main shaft is a crankshaft structure, and an eccentric oil passage is provided in the axial direction of the main shaft. One end of the main shaft with the eccentric oil passage passes downward through the machine base to cooperate with the motor rotor. The eccentric crank pin of the main shaft and the outer side of the chassis of the rotating scroll The shaft connecting groove is matched, and the motor rotor is matched with the motor stator;

The outer edge of the machine base is welded and fixedly matched with the casing, and the suction hole of the machine base is welded and connected with a suction pipe; an elastic sealing gasket is sandwiched between the machine base and the fixed scroll; the casing is composed of the upper half shell It is welded with the lower half shell, the orifice in the middle of the upper half shell of the casing is welded with the exhaust pipe, and the oil sight glass is installed on the lower half shell of the casing.

The present invention has following technical effect:

1. The fully-enclosed scroll compressor with elastic contact seal of the present invention uses the corrugated spring in the groove of the positioning ring to automatically eliminate the axial gap, and the radial spring in the groove of the positioning block automatically eliminates the radial direction, and always maintains the fixed scroll, rotating The axial and radial contact of the scroll disk eliminates gas leakage, increases volumetric efficiency, improves the operating performance of refrigeration compressors, reduces costs and saves energy.

2. The components of the fully enclosed scroll compressor with elastic contact seal of the present invention have simple structure, convenient processing and assembly, and are safe and reliable.

Description of drawings

Fig. 1 is the schematic diagram of the hermetic scroll compressor of elastic contact seal of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a B-B sectional view of Fig. 1 .

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The schematic diagrams of the hermetic scroll compressor with elastic contact seal of the present invention are shown in Fig. 1 to Fig. 3 . Including fixed scroll 1, corrugated spring 2, positioning ring 3, exhaust pipe 4, casing 5, rotating scroll 6, Oldham coupling ring 7, suction pipe 8, motor stator 9, motor rotor 10, main shaft 11 , Frame 12, orbiting scroll groove 13, radial spring 14, positioning block 15.

The positioning ring 3 is a ring structure, the outer edge of which is pressed into the casing 5 and closely fixedly fits with the casing 5, and the fixed scroll 1 is arranged under the positioning ring 3, and the axial direction of the positioning ring 3 faces one side of the fixed scroll 1 Axial grooves are evenly opened, and the corrugated spring 2 is placed in the axial grooves; the outer edge of the positioning block 15 is welded to the casing 5, and the positioning block 15 is provided with radial grooves, and the radial springs 14 are placed in the radial grooves .

The top of the fixed scroll 1 is in contact with the corrugated spring 2 in the groove of the positioning ring 3, and the outer circle of one side of the fixed scroll 1 is in contact with the radial spring 14 in the radial groove of the positioning block 15; the fixed scroll The rotary disk 1 and the orbiting scroll 6 are meshed with a phase difference of 180 degrees, the top of the scroll tooth of the fixed scroll contacts the inner side of the chassis of the orbiting scroll, and the inner surface of the chassis of the fixed scroll is in contact with the orbiting scroll The top surface of the spiral tooth is in contact, and forms the outermost suction space on the axis, the innermost exhaust space connected with the exhaust hole, and the middle compression space, a total of three pairs of working chambers; There is an air suction port communicated with the outermost air suction space;

The rotating scroll is driven by the main shaft 11 to rotate, the ring body of the cross coupling ring 7 is provided with a boss in a cross-symmetrical position, the base is provided with two symmetrical grooves, and the rotating scroll is provided with two symmetrical rotating The groove of the rotating disk 13, the groove of the base and the groove of the orbiting scroll are distributed in a cross position, and the bosses of the cross coupling ring are respectively in contact with the groove of the base at its lower part and the groove of the orbiting scroll at its upper part Sliding, the machine base is connected with the rotating scroll through the cross coupling ring, and the rotation of the main shaft drives the rotating scroll to rotate, so that the volume of each working chamber is continuously reduced from the outside to the inside, so as to achieve the purpose of suction, compression and exhaust. The main shaft 11 is a crank shaft structure, and an eccentric oil passage is provided in the axial direction of the main shaft. One end of the main shaft 11 with the eccentric oil passage passes downward through the machine base 12 to cooperate with the motor rotor 10. The eccentric crank pin of the main shaft and the rotating scroll The shaft connection groove on the outside of the chassis of the disk 6 is matched, and the motor rotor 10 is matched with the motor stator 9;

The outer edge of the base 12 is fixedly matched with the casing 5 by welding, and the suction hole of the base 12 is welded with a suction pipe 8 . An elastic sealing gasket is sandwiched between the base 12 and the fixed scroll 1 .

The casing is welded by the upper half shell and the lower half shell, the orifice at the middle position on the casing 5 is welded with the exhaust pipe 4, and the oil sight glass is installed on the lower half casing of the casing, corresponding to the suction A suction pipe 8 is welded at the position of the air hole.

When assembling, one end of the main shaft 11 with a lubricating oil channel is matched with the base 12, the Oldham coupling ring 7 is placed in the inner groove of the base 12, the orbiting scroll 6 is matched with the main shaft 11, and the outer side of the chassis of the orbiting scroll The cross groove formed by the groove 13 and the groove on the base is in contact with the cross coupling ring 7, and an elastic sealing gasket is placed between the base and the fixed scroll to cooperate with the fixed scroll 1, and the suction pipe 8. Weld it with the suction port of the machine base, match the part of the main shaft 11 protruding from the machine base 12 with the motor rotor 10, the motor rotor 10 and the motor stator 9, install the oil sight glass on the lower half of the casing 5, Press the above-mentioned whole into the lower half of the casing 5, inject the calculated amount of lubricating oil, weld the suction pipe 8 and the casing 5; press the positioning ring 3 into the upper half of the casing, and weld the positioning block 15 on it In the corresponding position of the half casing, the fixed scroll is matched with the positioning ring 3 and the positioning block 15 of the radial spring 14 of the corrugated spring 2 and the spring, the upper half casing is welded to the lower half casing, and the exhaust pipe 4 is connected to the The upper half casing is welded, the motor junction box is positioned, and the welding process is taken over outside the casing 5, and the complete assembly of the compressor is completed. When the main shaft 11 rotates at high speed, the lubricating oil located at the bottom of the casing 5, under the action of centrifugal force, flows along the eccentric oil passage opened in the direction of the inner axis of the main shaft 11, flows to the surface to be lubricated and seals the fit gap between parts, reducing leakage and friction loss.

The low-temperature and low-pressure gas refrigerant from the evaporator enters the outermost volume space formed by the fixed scroll and the rotating scroll through the suction pipe 8 and the suction hole on the frame 12, and the rotating scroll is driven by the main shaft. When the turntable rotates, the gas refrigerant enters the gradually decreasing volume space from the outside to the inside, until the innermost layer communicates with the exhaust hole, and the compressed high-temperature and high-pressure gas refrigerant enters through the exhaust hole. The space in the casing of the compressor is used to cool the motor and then discharge the compressor through the exhaust pipe.

As shown in the figure, the axial gap between the scroll tooth and the chassis between the fixed scroll and the orbiting scroll is automatically compensated and eliminated by the corrugated spring 2 in the groove of the positioning ring 3, and the fixed scroll, orbiting scroll The radial gap of the disk is automatically compensated and eliminated by the radial spring 14 in the groove of the positioning block 15, and the axial and radial contact between the fixed scroll and the rotating scroll is always maintained to eliminate gas leakage.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (2)

1. A fully-enclosed scroll compressor with elastic contact seal, including a fixed scroll, a corrugated spring, a positioning ring, a casing, a rotating scroll, an Oldham coupling ring, a motor stator, a motor rotor, a main shaft, a frame, Radial spring, positioning block; The positioning ring is a ring structure, the outer edge is pressed into the casing and tightly fixedly fitted with the casing, the side of the axial direction facing the fixed scroll is uniformly provided with an axial groove, and a corrugated spring is placed in the axial groove; positioning The outer edge of the block is welded to the casing, the positioning block is provided with a radial groove, and a radial spring is placed in the radial groove; the top of the fixed scroll contacts and cooperates with the corrugated spring in the groove of the positioning ring, and the fixed scroll The outer circle on one side of the positioning block is in contact with the radial spring in the radial groove of the positioning block; the fixed scroll and the orbiting scroll are meshed with a phase difference of 180 degrees, and the top of the spiral tooth of the fixed scroll is in contact with the orbiting scroll The inner side of the chassis of the rotating disk is in contact, the inner surface of the chassis of the fixed scroll is in contact with the top surface of the spiral teeth of the rotating scroll, and forms the outermost suction space on the axis, and the innermost layer communicates with the exhaust hole There are three pairs of studios in the exhaust space and the compression space in the middle; The base is provided with a suction port connected to the outermost suction space; the cross coupling ring is provided with a boss at a cross-symmetrical position, the base is provided with two symmetrical base grooves, and the rotating scroll is set Two symmetrical orbiting scroll grooves, the groove of the base and the groove of the orbiting scroll are distributed in a cross position, the boss of the cross coupling ring is respectively connected with the groove of the base at its lower part and the orbiting scroll at its upper part. The groove of the turntable is in contact with sliding, the base is connected with the rotating scroll through the cross coupling ring, and the rotation of the main shaft drives the rotating scroll to rotate. The main shaft is a crankshaft structure. One end of the eccentric oil passage goes downward through the machine base to cooperate with the motor rotor, the eccentric crank pin of the main shaft cooperates with the shaft connecting groove outside the chassis of the orbiting scroll, and the motor rotor cooperates with the motor stator. 2. The elastic contact-sealed hermetic scroll compressor according to claim 1, characterized in that, the outer edge of the machine base is welded and fixedly matched with the casing, and the suction hole of the machine base is welded and connected with a suction pipe ; There is an elastic sealing gasket between the base and the fixed scroll; the casing is welded by the upper half casing and the lower half casing, and the orifice in the middle of the upper half casing of the casing is welded to the exhaust pipe. An oil sight glass is installed on the lower half of the casing.