CN206290436U - Scroll compressor with axially soft dynamic cross coupling ring - Google Patents

Abstract

The utility model discloses a scroll compressor with an axial softly moving cross coupling ring. The utility model has an axially flexible cross connection ring composed of a cross connection ring bracket, a columnar spring and balls; the upper and lower ends of the cross connection ring bracket are provided with cross symmetrically arranged bosses, and grooves are arranged inside the bosses, and the grooves are placed Cylindrical spring, one end of the cylindrical spring is in contact with the bottom of the groove, and the other end is placed with a ball. The diameter of the ball is larger than the inner diameter of the cylindrical spring; The groove fits to connect the frame and the orbiting scroll. The utility model uses the axial flexible cross coupling ring to always maintain the axial contact between the fixed scroll and the rotating scroll, and eliminates radial leakage. Rolling, reducing friction loss, improving the operating performance of refrigeration compressors, reducing costs and saving energy.

Description

Scroll compressors with axially flexible Oldhams

technical field

The utility model relates to the technical field of refrigeration compressors for refrigeration and air conditioning, and is a scroll compressor with an axially flexible cross coupling ring.

Background technique

The excellent performance of the scroll refrigeration compressor makes it more and more widely used in the field of refrigeration and air conditioning. The key parameter that affects the volumetric efficiency of the scroll refrigeration compressor is the leakage coefficient. The axial gap between the two tooth tops and the bottom of the orbiting scroll and the fixed scroll produces radial leakage, usually at the top of the tooth. Sealing strips are used to reduce this leakage, but it will cause complicated processing of the moving disk. If the cross coupling ring between the moving disk and the frame is designed as an axially flexible and elastically stretchable structure, the rotating scroll and the rotating disk can be eliminated. The axial clearance of the fixed scroll disk increases the leakage coefficient, increases the gas delivery volume, and improves the performance of the scroll refrigeration compressor. But do not propose the technical scheme of concrete implementation yet at present.

Utility model content

The utility model aims to overcome the deficiencies in the prior art, and provides a scroll refrigeration compressor with an axially flexible, elastically stretchable cross coupling ring, so as to eliminate the rotating scroll and the fixed scroll. The axial clearance can increase the leakage coefficient, increase the gas transmission volume, improve the performance of the scroll refrigeration compressor, reduce investment, protect the environment and save energy.

The utility model is a scroll compressor with an axially flexible cross coupling ring, comprising a fixed scroll, a column spring, a ball, an exhaust pipe, a casing, a rotating scroll, a cross coupling ring bracket, and a motor stator , motor rotor, main shaft and frame;

The axially flexible cross coupling ring is composed of a cross coupling ring bracket, a column spring and a ball; the upper surface of the cross coupling ring bracket is symmetrically provided with an upper end boss, and the lower surface of the cross coupling ring bracket is symmetrically provided with a lower end boss. The upper boss and the lower boss are symmetrically arranged in a cross. Each boss is provided with a groove, and a cylindrical spring is placed in the groove. One end of the cylindrical spring is in contact with the bottom of the groove, and the other end of the cylindrical spring is placed with a ball. The diameter is larger than the inner diameter of the cylindrical spring; the base is provided with two symmetrical base grooves, and the orbiting scroll is provided with two symmetrical orbiting scroll grooves, the base grooves and the grooves are distributed in a cross position, and the axial flexibility The balls of the movable Oldham coupling ring are respectively embedded in the groove of the base at its lower part and the groove of the orbiting scroll at its upper part, and the base is connected with the orbiting scroll through the axially flexible Oldham coupling ring;

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 connection groove of the motor is matched, the motor rotor is matched with the motor stator; the outer edge of the fixed scroll is pressed into the casing and is tightly fixed with the casing, the fixed scroll and the rotating scroll are meshed with a phase difference of 180 degrees, and the fixed scroll is fixed. The top of the scroll tooth of the scroll is in contact with 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 top surface of the scroll tooth of the orbiting scroll, and forms the outermost layer on the axis. There are three pairs of working chambers: the suction space, the exhaust space connected to the exhaust hole on the innermost layer, and the compression space in the middle; the suction port connected to the suction space on the outermost layer is set on the base; Driven by the main shaft to rotate, the outer edge of the base is pressed into the casing and closely matched with the casing, and the exhaust hole of the fixed scroll is welded and connected with an exhaust pipe.

A sealing gasket is sandwiched 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 connected to the exhaust The pipe is welded, the oil sight glass is installed on the lower half of the casing, and the suction pipe is welded at the position corresponding to the suction orifice.

The utility model has the following technical effects:

1. The utility model has a scroll compressor with an axially flexible cross coupling ring. The axially flexible cross coupling ring is used to eliminate the gap between the fixed scroll and the rotating scroll by the columnar spring in the bracket of the cross coupling ring. The axial gap between the scroll teeth and the chassis always maintains the axial contact between the fixed scroll and the orbiting scroll, eliminating radial leakage. At the same time, the balls are in the cross grooves in the frame and orbiting scroll Rolling, reducing friction loss, improving the operating performance of refrigeration compressors, reducing costs and saving energy.

2. The scroll compressor parts of the utility model with an axially flexible cross coupling ring have a simple structure, convenient processing and assembly, and are safe and reliable.

Description of drawings

Figure 1 is a schematic diagram of a scroll compressor with an axially flexible cross coupling ring of the present invention;

Fig. 2 is a structural diagram of an axially flexible cross coupling ring;

Fig. 3 is a sectional view along line A-A of Fig. 1 .

detailed description

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment.

The schematic diagrams of the scroll compressor with an axially flexible cross coupling ring of the present invention are shown in Fig. 1 to Fig. 3 . Including fixed scroll 1, cylindrical spring 2, ball 3, exhaust pipe 4, casing 5, rotating scroll 6, cross coupling ring bracket 7, suction pipe 8, motor stator 9, motor rotor 10, main shaft 11 , base 12, orbiting scroll groove 13.

The axially flexible cross coupling ring is composed of a cross coupling ring bracket 7, a columnar spring 2 and a ball 3; the upper surface of the cross coupling ring bracket is symmetrically provided with an upper end boss, and the lower surface of the cross coupling ring bracket is symmetrically provided with a lower end boss , the upper boss and the lower boss are symmetrically arranged in a cross, each boss is provided with a groove, and a cylindrical spring is placed in the groove, one end of the cylindrical spring is in contact with the bottom of the groove, and the other end of the cylindrical spring is placed with a ball , the diameter of the ball is greater than the inner diameter of the cylindrical spring; the base 12 is provided with two symmetrical base grooves, and the orbiting scroll 6 is provided with two symmetrical orbiting scroll grooves 13, and the base groove and the orbiting scroll The grooves are distributed in a cross position, and the balls of the axially flexible Oldham coupling ring are respectively embedded in the groove of the base at its lower part and the groove of the orbiting scroll at its upper part. Rotating scroll connection;

The main shaft 11 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 11 with the eccentric oil passage passes through the frame 12 to cooperate with the motor rotor 10. The eccentric crank pin of the main shaft and the rotating scroll The shaft connecting groove on the chassis outside of 6 cooperates, and the motor rotor 10 cooperates with the motor stator 9.

The outer edge of the fixed scroll 1 is pressed into the casing 5 and tightly fitted with the casing 5. The fixed scroll 1 and the orbiting scroll 6 mesh with a phase difference of 180 degrees. The spiral teeth of the fixed scroll The top is in contact with 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 top surface of the spiral of the orbiting scroll, and forms the outermost suction space on the axis, the innermost layer and There are three pairs of studios in the exhaust space connected by the exhaust holes and the compression space in the middle. The machine base 12 is provided with an air suction port communicating with the outermost air suction space. The orbiting scroll is driven by the main shaft 11 to perform rotational motion, and the axially flexible cross coupling ring ensures that it can only rotate and translate around the center of the fixed scroll. When the compressor is working, the rotating scroll is driven by the rotation of the main shaft, 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 outer edge of the base 12 is pressed into the casing 5 and closely matched with the casing 5 , and the exhaust pipe 4 is welded and connected to the exhaust hole of the fixed scroll 1 . A 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 in the middle of the upper half shell of the casing 5 is welded with the exhaust pipe 4, and the oil sight is installed on the lower half shell of the casing. Mirror, the position corresponding to the suction orifice is welded with suction pipe 8.

When assembling, the end of the main shaft 11 with the lubricating oil channel is matched with the machine base 12, and the cylindrical spring 2 and the ball 3 are first placed in the cross coupling ring bracket 7 of the axially flexible cross coupling ring, and then placed in the inner concave of the machine base 12. Groove, the orbiting scroll 6 cooperates with the main shaft 11, the cross groove composed of the groove 13 on the outer side of the orbiting scroll chassis and the groove on the base is in contact with the ball 3 of the axially flexible cross coupling ring, and the base After placing a sealing gasket between the fixed scroll and the fixed scroll 1, the part of the main shaft 11 protruding from the base 12 is matched with the motor rotor 10, and the motor rotor 10 is matched with the motor stator 9. The lower part of the casing 5 Install the oil sight glass on the half shell, press the above-mentioned whole into the lower half shell of the casing 5, inject the calculated amount of lubricating oil, and weld the suction pipe 8 and the casing 5. One end of the exhaust pipe 4 is welded to the fixed scroll 1, the upper half casing is welded to the lower half casing, the exhaust pipe 4 is welded to the upper half casing, the motor junction box is positioned, and the welding process is performed outside the casing 5 Take over, and the whole compressor is assembled. 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 space in the casing of the compressor through the suction pipe 8, and after cooling the motor, it enters the fixed scroll and the rotating disk through the suction hole on the frame 12. The outermost volume space formed by the scroll disk, as the main shaft drives the rotating scroll disk to rotate, the gas refrigerant enters the volume space that gradually decreases from the outside to the inside, until the innermost layer communicates with the exhaust hole. , the compressed high-temperature and high-pressure gas refrigerant enters the exhaust pipe through the exhaust port and is discharged from the compressor.

As shown in the figure, the axial gap between the scroll tooth and the chassis between the fixed scroll and the orbiting scroll is eliminated by the column spring 2 in the Oldham coupling ring bracket 7, and the fixed scroll and orbiting scroll are always maintained. The axial contact of the turntable, at the same time, the ball rolls in the cross-symmetrical groove in the base and the orbiting scroll to reduce friction loss.

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

Claims (2)

1. a kind of scroll compressor with axially soft dynamic cross coupling ring, it is characterized in that, including fixed scroll, column bullet Spring, ball, blast pipe, casing, rotating vortex disk, cross connection ring support, motor stator, rotor, main shaft and support；

Axially soft dynamic cross coupling ring couples ring support, column spring and ball and constitutes by cross；Cross couples the upper of ring support Surface is symmetrical arranged upper end boss, and the lower surface of cross connection ring support is symmetrically arranged with lower end boss, the upper end boss with Lower end boss arranges in cruciform symmetry, is provided with groove in each boss, places column spring in groove, one end of column spring with The bottom contact of groove, the other end of column spring places ball, the internal diameter with diameter greater than column spring of ball；Support is set Two symmetrical base recess, rotating vortex disk sets two symmetrical rotating vortex disk grooves, base recess and rotating vortex Disk groove is in cross position distribution, and axially the ball of soft dynamic cross coupling ring is embedded in base recess and position positioned at its underpart respectively Rotating vortex disk groove to its upper, support is connected by axially soft dynamic cross coupling ring with rotating vortex disk；

The main shaft is crank shaft structure, and main shaft axial direction offers eccentric oil duct, main shaft carry one end of eccentric oil duct to Under coordinate through support and rotor, the eccentric crank pin of main shaft is matched somebody with somebody with the axle link slot on the outside of the chassis of rotating vortex disk Close, rotor coordinates with motor stator；The outward flange press-in casing of fixed scroll is simultaneously tightly fastened cooperation with casing, fixed Scroll plate is engaged with rotating vortex disk with the phase difference of 180 degree, top and the rotating vortex disk of the scroll wrap of fixed scroll Chassis interior side contacts, the chassis inner surface of fixed scroll is contacted with the top end surface of the scroll wrap of rotating vortex disk, and Exhaust space, middle compression stroke totally three pairs that outermost breathing space, innermost layer and steam vent are communicated are formed on axis Operating room；The air entry connected with outermost breathing space is provided with support；Rotating vortex disk is driven to do and rotated by main shaft Motion, the outward flange press-in casing of the support is simultaneously fitted close with casing, has been welded to connect at the steam vent of fixed scroll Blast pipe.

2. the scroll compressor with axially soft dynamic cross coupling ring according to claim 1, it is characterised in that support with Gasket seal is accompanied between fixed scroll；The casing is welded by upper half-shell and housing lower half, the upper half shell of casing The aperture of body center position is welded with blast pipe, is provided with the housing lower half of casing regarding oil mirror, the position in correspondence air-breathing aperture It is welded with air intake duct.