CN111946618B

CN111946618B - Vortex type refrigerating compressor

Info

Publication number: CN111946618B
Application number: CN202010955255.9A
Authority: CN
Inventors: 闫伟国; 常艳红; 杨春立
Original assignee: Bingshan Songyang Compressor Dalian Co ltd
Current assignee: Bingshan Songyang Compressor Dalian Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2024-07-09
Anticipated expiration: 2040-09-11
Also published as: CN111946618A

Abstract

The invention provides a vortex refrigeration compressor. The compressor of the present invention includes: the device comprises a shell, an air suction pipe, a supporting mechanism, a crankshaft, a motor, an oil pool and the like; in order to ensure the assembly precision, the supporting mechanism is divided into three parts, namely a supporting frame, a bearing seat and a cover plate; the support frame and the bearing seat are made into corresponding gaps, a sheet type plug gauge is arranged between the support frame and the bearing seat to ensure an air gap between the stator and the rotor, after the bearing seat is fixed, the plug gauge is drawn away, and then a cover plate is arranged to seal the gaps; in addition, a channel is formed on the side wall of the support frame, which is opposite to the air suction pipe, and the periphery of the channel is enclosed and sealed by the interference surface of the support frame and the shell. The design makes motor coil thoroughly separate with the oil pool, and after the refrigerant gets into the coil cavity, a part passes through from stator rotor air gap, and the rest can only pass through from between the gap of support frame terminal surface and motor to guarantee that the oil pool is stable, reduce and spit the oil mass.

Description

Vortex type refrigerating compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a vortex refrigeration compressor with an air suction pipe arranged below a motor.

Background

When the compressor is operated in winter, the evaporation pressure is low, the refrigerant circulation quantity is small, and the motor needs to be cooled better. One common solution is to provide an air suction pipe at the lower part of the motor so that the refrigerant passes around the motor to cool the motor.

The suction pipe is arranged at the lower part of the motor, which means that the suction pipe is close to the oil pool, and the refrigerant sucked into the compressor is required to be well isolated from the oil pool, otherwise, the air flow can interfere the oil surface and form foam, so that the oil discharge amount is increased. One common method of preventing foam generation is to make the lower support a hood that houses the wires below the motor, the refrigerant directly entering the hood and then flowing out mostly from the upper portion.

The form of the lower support as an integral cover has the following disadvantages:

1. the gap between the stator and the rotor is shielded, and the gap between the stator and the rotor cannot be ensured by directly using a sheet plug gauge;

2. The coaxiality of the upper bearing and the lower bearing is difficult to realize.

Disclosure of Invention

According to the technical problem set forth above, a scroll refrigeration compressor is provided. The invention adopts the following technical means:

The utility model provides a vortex formula refrigeration compressor, includes casing and motor, oil bath, breathing pipe and the motor rotator bearing structure of setting in the casing, the inside support frame that is equipped with of casing, the surface of support frame is intermittent circular arc surface, wholly becomes cyclic annular to surround motor lower part coil, and the intermittent external round surface of support frame is fixed with casing interference fit, and the air suction channel of corresponding breathing pipe has been seted up to an interference surface of support frame, and the casing corresponds the position and sets up the opening, and around the interference surface will the air suction channel seals, and the stator of motor is installed in the top of support frame, the centre bore that supplies the bearing frame to install is seted up to the bottom plate of support frame, exists first passageway between support frame and the bearing frame, and the outer periphery of bearing frame is equipped with the apron, and the apron is installed on the support frame, and there is first gap between the laminating face between apron and the bearing frame, and the gas that the air suction channel got into gets into the oil bath through first passageway and first gap, exists the second gap between motor and the support frame, and the gas through the second gap does not get into the oil bath, and the area that does not get into the oil bath gap is greater than the circulation area that gets into the oil bath gap.

Further, the motor comprises a stator and a rotor, the rotor is connected with the crankshaft, a third gap exists between the rotor and the stator, gas passing through the third gap does not enter the oil pool, a fourth gap is formed after the crankshaft is inserted into the bearing seat, and gas passing through the fourth gap enters the oil pool.

Further, the air suction pipe is welded on the shell body opposite to the air suction channel.

Further, the central hole is irregularly shaped, the outline of the bearing seat is matched with the central hole, the central hole and the bearing seat are fixed through the second screw set, and the cover plate is installed on the support frame through the first screw set.

Further, the motor rotator supporting structure comprises the bearing seat and a ball bearing arranged in the bearing seat, a round outer surface is machined below an outline notch of the bearing seat, a hole is formed in the middle of an upper top plate of the bearing seat, the ball bearing is shielded by the rest part of the bearing seat, a groove for placing an elastic retainer ring is formed in an inner hole of a main body of the bearing seat, and the elastic retainer ring is used for axially restraining the ball bearing.

Further, the crankshaft forms clearance fit with the central hole of the ball bearing through the middle opening of the upper top plate of the bearing seat, a shaft shoulder is pressed on the upper end face of the ball bearing to axially position, threads are processed at the tail end of the crankshaft, a connecting sleeve is mounted on the threads at the tail end of the crankshaft, and the connecting sleeve is used for fastening the crankshaft and the ball bearing together.

Further, the first channel can accommodate a plug gauge for cushioning between gaps between the stator and the rotor before the cover plate is mounted, ensuring a minimum spacing therein.

The invention has the following advantages: the bearing seat, the cover plate and the crankshaft seal the bottom hole of the support frame approximately together, so that an independent cavity is formed between the support frame and the motor; after the gas enters, the gas can only flow out from the gap between the stator and the rotor and the gap between the support frame and the stator core; the gas channel and the oil pool can be well separated, and lubricating oil can not be blown into foam any more, so that the oil discharge amount is reduced. In addition, the bottom hole of the support frame and the petal-shaped channel formed by the support frame are combined, and when the assembly is carried out, before the support frame and the crankshaft are not installed, the sheet plug gauge is placed into the stator from the channel; the petal-shaped notch is reserved in the bearing seat, so that the plug gauge cannot be influenced when the bearing seat is installed; and after the bearing seat is aligned and fixed, the plug gauge is pulled out. The invention can ensure the normal use of the plug gauge and well isolate the gas channel from the oil pool.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

Fig. 1 is a partial axial sectional view of a compressor.

Fig. 2 is a bottom view of the support frame and the bearing seat after installation.

Fig. 3 is a bottom view of the plug gauge in use.

Fig. 4 is a partial axial cross-sectional view of the use of the plug gauge.

Fig. 5 is a schematic view of the support frame, wherein (a) is a bottom view, (b) is a front view, and (c) is a sectional view of the suction passage.

Fig. 6 is a top view of the bearing housing.

In the figure: 1. a stator; 2. an air suction pipe; 3. a support frame; 4. a ball bearing; 5. a bearing seat; 6. a cover plate; 7. a first screw set; 8. a second screw set; 9. a rotor; 10. a housing; 11. a second slit; 12. a third slit; 13. sealing surfaces of the air suction pipes; 14. pressing the surface; 15. a first slit; 16. a fourth slit; 17. a first channel; 20. a connecting sleeve; 21. a crankshaft; 22. a circlip; 23. an outer circumferential surface; 24. an air suction passage; 25. a chamber; 26. a central bore; 27. an oil pool; 28. plug gauge.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1, this embodiment discloses a scroll refrigeration compressor, including casing 10 and motor, oil pool, breathing pipe 2 and motor rotator bearing structure that set up in casing 10, the inside support frame 3 that is equipped with of casing, as shown in fig. 2, the surface of support frame 3 is intermittent circular arc face, wholly becomes the cyclic annular and surrounds motor lower part coil, and the intermittent external circular surface 23 of support frame 3 is fixed with casing 10 interference fit, and the air suction channel 24 that corresponds breathing pipe 2 has been seted up to an interference face of support frame 3, and the casing corresponds the position and sets up the opening, and the interference face all around will air suction channel 24 seals. The stator 1 of the motor is arranged above the supporting frame, a central hole 26 for installing the bearing seat 5 is formed in the bottom plate of the supporting frame, a first channel is formed between the supporting frame 3 and the bearing seat 5, a cover plate 6 is arranged on the outer circumferential surface of the bearing seat 5, the cover plate 6 is arranged on the supporting frame 3, a pressing surface 14 between the cover plate 6 and the bearing seat 5 forms a sealing surface, a first gap 15 is formed between the cover plate 6 and the bearing seat 5, gas entering through the air suction channel 24 enters an oil pool 27 through the first channel 17 and the first gap 15, a second gap 11 is formed between the motor and the supporting frame 3, specifically, the upper end surface of the supporting frame faces the end surface of the stator core, the gas passing through the second gap 11 does not enter the oil pool 27, and the flow area of the gas which does not enter the oil pool gap is larger than the flow area of the oil pool gap.

The motor comprises a stator 1 and a rotor 9, the rotor 9 is connected with a crankshaft 21, a third gap 12 is formed between the rotor 9 and the stator 1, gas passing through the third gap 12 does not enter an oil pool, a fourth gap 16 is formed after the crankshaft 21 is inserted into the bearing seat 5, and gas passing through the fourth gap 16 enters the oil pool. To this end, the housing 10, the support frame 3, the stator 1, the rotor 9, the crankshaft 21, the bearing housing 5, the cover plate 6 together form a chamber 25.

The suction pipe 2 is welded to the housing 10 directly opposite to the suction channel 24. The suction pipe and the shell bracket are provided with a suction pipe sealing surface 13.

The central hole is irregularly shaped, as shown in fig. 5 (a) (b) (c) and fig. 6, in this embodiment, the central hole is petal-shaped, the outer contour of the bearing seat is matched with the central hole, the protruding part is provided with a through hole mounting screw, the recessed part and the support frame jointly form a first channel, the first channel and the second channel are fixed through a second screw 8 group, and the cover plate is mounted on the support frame through a first screw 7 group.

The motor rotator supporting structure comprises a bearing seat and a ball bearing 4 arranged in the bearing seat, a round outer surface is machined below an outer contour notch of the bearing seat, a hole is formed in the middle of an upper top plate of the bearing seat, the ball bearing is shielded by the rest part of the bearing seat, a groove for placing a circlip 22 is formed in an inner hole of a bearing seat main body, and the circlip is used for axially restraining the ball bearing.

The crankshaft is in clearance fit with the central hole of the ball bearing through the middle opening of the upper top plate of the bearing seat, one shaft shoulder is pressed on the upper end face of the ball bearing to axially position, threads are machined at the tail end of the crankshaft, a connecting sleeve 20 is installed on the threads at the tail end of the crankshaft, and the connecting sleeve 20 is used for fastening the crankshaft and the ball bearing together.

As shown in fig. 3 and 4, the first channel can accommodate a plug gauge, the plug gauge is used for being padded between gaps between the stator and the rotor before the cover plate is installed, so as to ensure the minimum distance between the stator and the rotor, specifically, the first channel 17 is just used for placing the plug gauge 28 before the cover plate 6 is installed, the plug gauge 28 is padded in the third gap 12 so as to ensure the minimum distance between the stator and the rotor, after the bearing seat 5 is fixed, the plug gauge 28 is pulled out, and the cover plate 6 is installed to seal the first channel 17.

When the compressor works, gas enters the chamber 25 through the gas suction pipe 2 and the first channel 17; the outlet of the chamber 25 comprises a first slit 15, a fourth slit 16, a third slit 12 and a second slit 11; when the design is adopted, the flow areas of the first gap 15 and the fourth gap 16 are far smaller than those of the second gap 11 and the third gap 12, so that most of gas is discharged from the chamber 25 through the second gap 11 and the third gap 12, and only a very small part of gas is blown to the oil pool 27 through the first gap 15 and the fourth gap 16; the velocity of the gas blown out from the first slit 15 and the fourth slit 16 is rapidly reduced by the rapid expansion of the flow area upon discharge, and excessive influence on the oil surface is avoided. According to the invention, the motor coil is thoroughly isolated from the oil pool, after the refrigerant enters the coil cavity, part of the refrigerant passes through the air gap between the stator and the rotor, and the rest of refrigerant only passes through the gap between the end face of the support frame and the motor, so that the stability of the oil pool 27 is ensured, and the oil discharge amount is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The utility model provides a vortex formula refrigeration compressor, including the casing and set up motor, the oil bath, the breathing pipe in the casing, its characterized in that, the inside motor rotator bearing structure and the support frame of still being equipped with of casing, the surface of support frame is intermittent circular arc surface, wholly become cyclic annular and surround motor lower part coil, the intermittent surface of support frame is fixed with the casing interference fit, the air suction passageway of corresponding breathing pipe is seted up to an interference face of support frame, the casing corresponds the position and sets up the opening, the interference face all around seals the air suction passageway, the stator of motor is installed in the top of support frame, the centre bore that supplies the bearing frame to install is seted up to the bottom plate of support frame, there is first passageway between support frame and the bearing frame, the outer periphery of bearing frame is equipped with the apron, the apron is installed on the support frame, there is first gap between the apron and the bearing frame, the gas that the air suction passageway got into gets into through first passageway and first gap gets into the oil bath, there is the second gap between motor and the support frame, the gas that passes through the second gap does not get into the oil bath gap's area that is greater than the flow area that gets into the oil bath gap;

The motor comprises a stator and a rotor, the rotor is connected with the crankshaft, a third gap is formed between the rotor and the stator, gas passing through the third gap does not enter the oil pool, a fourth gap is formed after the crankshaft is inserted into the bearing seat, and the gas passing through the fourth gap enters the oil pool;

The air suction pipe is welded on the shell body opposite to the air suction channel;

the first channel can accommodate a plug gauge, and the plug gauge is used for being filled between gaps between the stator and the rotor before the cover plate is installed, so that the minimum distance between the stator and the rotor is ensured.

2. The scroll refrigeration compressor as set forth in claim 1, wherein the central hole is irregularly shaped, the outer contour of the bearing housing is matched with the central hole, both are fixed by the second screw set, and the cover plate is mounted on the support frame by the first screw set.

3. The scroll refrigeration compressor as set forth in claim 1 or 2, wherein the motor rotor support structure includes the bearing housing and a ball bearing mounted in the bearing housing, a full-round outer surface is machined under the bearing housing outer contour notch, a hole is formed in the middle of the upper top plate, the ball bearing is shielded by the rest, a groove for accommodating a circlip is formed in the bearing housing main body inner hole, and the circlip is used for axially restraining the ball bearing.

4. A scroll refrigeration compressor as set forth in claim 3 wherein the crankshaft is clearance fit through the central opening in the upper top plate of said bearing housing and the central bore of the ball bearing, a shoulder bearing axially located on the upper end face of the ball bearing, the crankshaft end being threaded with a connecting sleeve for securing the crankshaft to the ball bearing.