CN103511272A - Scroll compressor lower bearing supporting structure - Google Patents
Scroll compressor lower bearing supporting structure Download PDFInfo
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- CN103511272A CN103511272A CN201210200126.4A CN201210200126A CN103511272A CN 103511272 A CN103511272 A CN 103511272A CN 201210200126 A CN201210200126 A CN 201210200126A CN 103511272 A CN103511272 A CN 103511272A
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- lower bearing
- peripheral surface
- lower bracket
- scroll compressor
- supporting structure
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Abstract
The invention relates to a scroll compressor lower bearing supporting structure comprising a low-pressure chamber and a high-pressure chamber arranged in the compressor. A motor is arranged in the middle of the low-pressure chamber. The motor is connected with an eccentric crankshaft. The upper end and the lower end of the eccentric crankshaft are respectively supported by an upper bearing and a lower bearing. The lower bearing is connected with a lower bearing support. The lower bearing and the lower bearing support are connected through the interference fit of the outer circumference of the lower bearing and the inner circumference of the lower bearing support. According to the scroll compressor lower bearing supporting structure, the lower bearing is directly pressed into the lower bearing support. When the lower bearing and the lower bearing support are assembled, a special fixture necessary for ensuring the concentricity of the two is eliminated, and the diameter and end face height of the lower bearing can be greatly reduced. According to the invention, assembly time is reduced, the cost for manufacturing the special fixture is saved, material for the lower bearing is saved, and the manufacturing cost of the scroll compressor is greatly reduced.
Description
Technical field
The present invention relates to the supporting structure of compressor, specifically a kind of scroll compressor lower bearing supporting structure.
The present invention relates to the assembling method of compressor structural components, specifically a kind of assembling method of scroll compressor lower bearing supporting structure.
Background technique
In general, compressor is the part in freezing cycle device, is to pressurizes refrigerant, makes the pressure of refrigeration agent and the device that temperature is applicable to special purpose.Freezing cycle device comprises that compressor, condenser, expansion gear, vaporizer form, and each parts interconnect, and form the circulatory system of sealing.
This freezing cycle device, compression is drawn into the refrigerant gas of the low-temp low-pressure state in compressor, with high-temperature high-pressure state, discharge, and the refrigerant gas of discharging is when by condenser, discharges latent heat to outside, thus the liquid state of being converted into.Meanwhile, when by expansion gear, reduce pressure, and then, by the process of vaporizer, evaporate the refrigeration agent of low-pressure state, thereby absorb outside heat.And the refrigeration agent being vaporized flow in compressor again, thus said process repeatedly.
Freezing cycle device, is generally arranged on the electrical equipment such as air conditioner or refrigerator, thereby utilizes cold air and the hot gas forming in condenser and vaporizer, and the comfort level in holding chamber or assurance food are fresh.
Compressor arrangement and working principle are: compressor is provided with low-pressure cavity and hyperbaric chamber, low-pressure cavity is provided with intakeport, hyperbaric chamber is provided with relief opening, during compressor operating, cold media air enters low-pressure cavity by intakeport, is compressed into pressurized gas enters hyperbaric chamber through movable orbiting scroll He Jing whirlpool dish, and finally by relief opening, discharged, there is pad and be connected and go into Seal cage with screw fastening in high low pressure isolating plate, prevents that hyperbaric chamber gas from flowing into low-pressure cavity between coiling with compressor case welding ，Yu Jing whirlpool.
As shown in Figure 1, eccentric crankshaft rotates under the power of motor drives, thereby drives the part of compressor work area part to do work.In this process, require the running of bent axle held stationary, this just needs upper bearing (metal) to guarantee higher relative stability with lower bearing, and keeps the two higher concentricity.
There is following problem in the rotary compressor sealing configuration of prior art:
In the prior art, the assembling of lower bearing and lower bracket needs the special special fixture that guarantees lower bearing and lower bracket concentricity of manufacturing, and during assembling, first by special fixture, lower bearing and lower bracket position is fixed and is clamped; Then by three screws, lower bearing is fixed on lower bracket, when set screw, need to guarantee that the warping force that three screws are subject to is identical, otherwise the precision of the concentricity of lower bearing and lower bracket is difficult to guarantee, therefore, packaging technology is complicated, and difficulty is large, precision after assembling is difficult to assurance, and packaging efficiency is low.
Summary of the invention
The present invention be exactly for solve prior art in, the lower bearing of scroll compressor and the packaging technology of lower bracket are complicated; To assembling workman's technical merit, require high; Assembling procedure needs the special special fixture that guarantees lower bearing and lower bracket concentricity of manufacturing, and concentricity is still difficult to guarantee, the low technical barrier that waits of assembly working efficiency, and a kind of simple and scroll compressor lower bearing supporting structure together with fast lower bearing being assembled into lower bracket is provided.
The technical solution used in the present invention is:
A kind of scroll compressor lower bearing supporting structure, comprise the low-pressure cavity and the hyperbaric chamber that are arranged on compressor inside, described low-pressure cavity middle part is provided with motor, described motor is connected with eccentric crankshaft, described eccentric crankshaft top and bottom are supported by upper bearing (metal) and lower bearing respectively, described upper bearing (metal) is connected with upper bearing (metal) supporting frame, and lower bearing is connected with lower bracket; Described lower bearing is connected with lower bracket inner peripheral surface interference fit by lower bearing outer peripheral surface with lower bracket.
Described lower bearing end face is rounded.
Described lower bracket edge is provided with the gusset to downward-extension, and described lower bracket lower surface and gusset form the cavity that Open Side Down.
Described lower bearing outer peripheral surface is comprised of interference fit outer peripheral surface and non-interference fit outer peripheral surface two-part, and described interference fit outer peripheral surface is arranged on the top of non-interference fit outer peripheral surface; The height of described interference fit outer peripheral surface is greater than the height of lower bracket inner peripheral surface.
The lower surface of described lower bearing and the laminating of lower bracket upper surface.
An assembling method for scroll compressor lower bearing supporting structure, is pressed into described lower bearing outer peripheral surface in the inner peripheral surface of lower bracket from top to bottom.
An assembling method for scroll compressor lower bearing supporting structure, comprising:
A. by lower bracket heating, lower bracket inner peripheral surface expanded by heating;
B. lower bearing outer peripheral surface inserts in the inner peripheral surface of lower bracket.
Advantage and good effect that the present invention has are:
Scroll compressor lower bearing supporting structure of the present invention, lower bearing only need to directly be pressed into lower bracket; When assembling lower bearing and lower bracket, saved the special fixture that must make in order to guarantee the two concentricity; Owing to not needing screw fastening, lower bearing end face is guaranteeing that under the prerequisite of sufficient intensity, the diameter of lower bearing and end face height can significantly reduce, and therefore, the present invention has reduced installation time, has saved the expense of making special fixture; Saved the material of lower bearing, the manufacture cost of scroll compressor of the present invention reduces significantly.
Accompanying drawing explanation
Fig. 1 is prior art scroll compressor plane structure schematic diagram;
Fig. 2 is the prior art lower bearing stereo decomposing structural representation that is connected with lower bracket;
Fig. 3 is prior art lower bearing and lower bracket coupled condition perspective view;
Fig. 4 is that prior art lower bearing is connected plan view with lower bracket;
Fig. 5 is the A-A sectional view of Fig. 4;
Fig. 6 is eccentric crankshaft of the present invention and lower bearing and lower bracket coupled condition perspective view;
Fig. 7 is that lower bearing of the present invention is connected plan view with lower bracket;
Fig. 8 is the B-B sectional view of Fig. 7;
Fig. 9 is the lower bearing of the present invention stereo decomposing structural representation that is connected with lower bracket;
Figure 10 is lower bearing of the present invention and lower bracket coupled condition perspective view.
In figure:
1. hyperbaric chamber 2. relief openings
3. coil in high low pressure isolating plate 4.Jing whirlpool
5. intakeport 6. movable orbiting scrolls
7. low-pressure cavity 8. lower bearings
9. lower bracket 10. eccentric crankshafts
11. screw 12. motors
13. upper bearing (metal) 14. lower bearing outer peripheral surfaces
15. lower bracket inner peripheral surface 16. lower bearing end faces.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be described in detail.
A kind of scroll compressor lower bearing supporting structure, comprise the low-pressure cavity 7 and the hyperbaric chamber 1 that are arranged on compressor inside, described low-pressure cavity 7 is provided with intakeport 5, described hyperbaric chamber 1 is provided with relief opening 2, cold media air enters low-pressure cavity 7 by intakeport 5, after movable orbiting scroll 6 He Jing whirlpool dishes 4 are compressed into pressurized gas, enter hyperbaric chamber 1, described pressurized gas are got rid of by relief opening 2; Described low-pressure cavity middle part is provided with motor 12, described motor 12 is connected with eccentric crankshaft 10, described eccentric crankshaft 10 top and bottom are supported by upper bearing (metal) 13 and lower bearing 8 respectively, and described upper bearing (metal) 13 is connected with upper bearing (metal) supporting frame, and lower bearing 8 is connected with lower bracket 9; Described lower bearing 8 is connected with lower bracket inner peripheral surface 15 interference fit by lower bearing outer peripheral surface 14 with lower bracket 9.
Scroll compressor lower bearing end face 16 is rounded; Circular end surface is only to play the effect of location, thus end surface thickness can design very thin; Described lower bracket 9 edges are provided with the gusset to downward-extension, and gusset forms by punching press, so the thickness of gusset is substantially identical with the thickness of support upper-end surface; Described lower bracket 9 lower surfaces and gusset form the cavity that Open Side Down.Lower bearing outer peripheral surface 14 is comprised of interference fit outer peripheral surface and non-interference fit outer peripheral surface two-part, and described interference fit outer peripheral surface is arranged on the top of non-interference fit outer peripheral surface; The height of described interference fit outer peripheral surface is greater than the height of lower bracket inner peripheral surface 15 conventionally, due to corresponding with non-interference fit outer peripheral surface that inner circumferential surface is to play the guiding role, so the height of non-interference fit outer peripheral surface can be determined according to compressor real work stressing conditions.The lower surface of lower bearing and the laminating of lower bracket upper surface, play the positioning action to lower bearing.
When lower bearing 8 and lower bracket 9 are assembled, the inner peripheral surface (15) that can directly described lower bearing 8 outer peripheral surfaces 14 be pressed into from top to bottom to lower bracket 9 also can be first by lower bracket 9 heating, lower bracket inner peripheral surface 15 expanded by heating; And then lower bearing outer peripheral surface 14 is inserted in the inner peripheral surface 15 of lower bracket.
As shown in Figure 6, the eccentric crankshaft of compressor is high speed rotating under the power of motor drives, thereby drives the part of compressor work area part to do work.In this process, require the running of bent axle held stationary, this just needs upper bearing (metal) to guarantee higher relative stability with lower bearing, higher relative concentricity, otherwise eccentric crankshaft will produce violent vibrations, cause the excessive wear of inner body, shorten the working life of compressor, and can produce powerful noise, environment is caused to noise pollution.
Scroll compressor lower bearing supporting structure of the present invention, adopt lower bearing to be pressed into the assembling mode in lower bracket, and in prior art lower bearing to be connected with lower bracket be to adopt 3 screw fastening modes, this means of fixation is due to the narrow limitation of self, in order to guarantee that lower bearing can pack lower bracket smoothly into, therefore between the outer peripheral surface of lower bearing and the inner peripheral surface of lower bracket, must be provided with gap, there is just this gap, in assembling lower bearing and lower bracket, need to use special-purpose fixture guarantee lower bearing and the concentricity of lower bracket.In prior art, first the assembling of lower bearing and lower bracket is fixed lower bearing and lower bracket position by special tool, guaranteeing that lower bearing and lower bracket concentricity reach under the prerequisite of technical requirements, by the two clamping; Then in screw hole, put into screw, by three screws, lower bearing is fixed on lower bracket, when set screw, need to guarantee that the warping force that three screws are subject to is identical, therefore also need to use special tool simultaneously fastening, otherwise lower bearing just, likely because unbalance stress produces distortion, causes the concentricity of lower bearing and lower bracket not reach technical requirements, affects the normal operation of compressor.
With respect to prior art, when the present invention has saved assembling for guarantee concentricity and need the special fixture made; The processing of 3 screw holes of removal on lower bearing and lower bracket; Lower bearing end face can reduce height and diameter under the prerequisite of proof strength as far as possible; Lower bearing and lower bracket pack into simultaneously, can guarantee self-alignment, can guarantee that the two has higher concentricity.
Scroll compressor lower bearing supporting structure lower bearing end face of the present invention changes circle into, in prior art, because being used screw, needs connect lower bearing and lower bracket, in order to improve the intensity of connecting thread bore edges, lower bearing end face has to manufacture the triangle of unfilled corner, this structure difficulty of processing is large, manufacturing process is complicated, and that the present invention manufactures the processing technology of lower bearing is simple, work efficiency is higher, owing to not needing screw assembling, therefore, the shearing stress that lower bearing end face bears greatly reduces, lower bearing end face is exactly the position-limiting action of bearing in lower bearing and lower bracket assembling process substantially, therefore lower bearing end surface thickness can significantly reduce, can save a large amount of raw material thus.
Lower bracket of the present invention, internal diameter adopts in-flanges impact briquetting.Pressing direction is consistent with pressing direction outside support, in the time of can guaranteeing to assemble like this and during compressor operation, the strength and stiffness of support are compared original structure lifting by a relatively large margin, when not increasing manufacture cost, improved the rigidity of lower bracket, while guaranteeing crankshaft high-speed rotation, the concentricity of metal (upper, reduce excessive wear and the noise pollution to surrounding environment that the vibrations that cause due to metal (upper decentraction cause inner body, extended the working life of compressor.
Scroll compressor lower bearing supporting structure of the present invention, in assembling process, lower bearing only need to directly be pressed into lower bracket; When assembling lower bearing and lower bracket, saved the special fixture that prior art must be made in order to guarantee the two concentricity; Owing to not needing screw fastening, lower bearing end face is guaranteeing that under the prerequisite of sufficient intensity, the diameter of lower bearing and end face height can significantly reduce, and therefore, the present invention has reduced installation time, has saved time and the expense of adjusting special fixture of making; Saved the raw material of lower bearing, the manufacture cost of scroll compressor of the present invention reduces significantly.
Claims (7)
1. a scroll compressor lower bearing supporting structure, comprise the low-pressure cavity (7) and the hyperbaric chamber (1) that are arranged on compressor inside, described low-pressure cavity middle part is provided with motor (12), described motor (12) is connected with eccentric crankshaft (10), described eccentric crankshaft (10) top and bottom are supported by upper bearing (metal) (13) and lower bearing (8) respectively, described upper bearing (metal) (13) is connected with upper bearing (metal) supporting frame, and lower bearing (8) is connected with lower bracket (9); It is characterized in that: described lower bearing (8) is connected with lower bracket inner peripheral surface (15) interference fit by lower bearing outer peripheral surface (14) with lower bracket (9).
2. scroll compressor lower bearing supporting structure according to claim 1, is characterized in that: described lower bearing end face (16) is rounded.
3. scroll compressor lower bearing supporting structure according to claim 1, is characterized in that: described lower bracket (9) edge is provided with the gusset to downward-extension, and described lower bracket (9) lower surface and gusset form the cavity that Open Side Down.
4. scroll compressor lower bearing supporting structure according to claim 1, it is characterized in that: described lower bearing outer peripheral surface (14) is comprised of interference fit outer peripheral surface and non-interference fit outer peripheral surface two-part, and described interference fit outer peripheral surface is arranged on the top of non-interference fit outer peripheral surface; The height of described interference fit outer peripheral surface is greater than the height of lower bracket inner peripheral surface (15).
5. scroll compressor lower bearing supporting structure according to claim 1, is characterized in that: the lower surface of described lower bearing and the laminating of lower bracket upper surface.
6. an assembling method for scroll compressor lower bearing supporting structure, is characterized in that: the inner peripheral surface (15) that described lower bearing outer peripheral surface (14) is pressed into from top to bottom to lower bracket.
7. an assembling method for scroll compressor lower bearing supporting structure, is characterized in that:
A. by lower bracket (9) heating, lower bracket inner peripheral surface (15) expanded by heating;
B. lower bearing outer peripheral surface (14) inserts in the inner peripheral surface (15) of lower bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210200126.4A CN103511272A (en) | 2012-06-18 | 2012-06-18 | Scroll compressor lower bearing supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210200126.4A CN103511272A (en) | 2012-06-18 | 2012-06-18 | Scroll compressor lower bearing supporting structure |
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| Publication Number | Publication Date |
|---|---|
| CN103511272A true CN103511272A (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210200126.4A Pending CN103511272A (en) | 2012-06-18 | 2012-06-18 | Scroll compressor lower bearing supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485017A (en) * | 2016-01-26 | 2016-04-13 | 广东美的暖通设备有限公司 | Mounting structure of thrust bearing and vortex-compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829959A (en) * | 1994-09-16 | 1998-11-03 | Hitachi, Ltd. | Scroll compressor |
| CN101158351A (en) * | 2007-11-16 | 2008-04-09 | 美的集团有限公司 | Scroll compressor and control method thereof |
| CN201771775U (en) * | 2010-06-29 | 2011-03-23 | 上海日立电器有限公司 | Negative pressure oil gas supply component of horizontal type scroll compressor |
| JP2011510210A (en) * | 2008-01-17 | 2011-03-31 | ビッツァー クールマシーネンバウ ゲーエムベーハー | Compressor for fluid compression and pressure load carrying method of scroll compressor having baffle member |
-
2012
- 2012-06-18 CN CN201210200126.4A patent/CN103511272A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829959A (en) * | 1994-09-16 | 1998-11-03 | Hitachi, Ltd. | Scroll compressor |
| CN101158351A (en) * | 2007-11-16 | 2008-04-09 | 美的集团有限公司 | Scroll compressor and control method thereof |
| JP2011510210A (en) * | 2008-01-17 | 2011-03-31 | ビッツァー クールマシーネンバウ ゲーエムベーハー | Compressor for fluid compression and pressure load carrying method of scroll compressor having baffle member |
| CN201771775U (en) * | 2010-06-29 | 2011-03-23 | 上海日立电器有限公司 | Negative pressure oil gas supply component of horizontal type scroll compressor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485017A (en) * | 2016-01-26 | 2016-04-13 | 广东美的暖通设备有限公司 | Mounting structure of thrust bearing and vortex-compressor |
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Application publication date: 20140115 |