CN209195701U

CN209195701U - Screw compressor

Info

Publication number: CN209195701U
Application number: CN201821477550.2U
Authority: CN
Inventors: 邓冬; 杨忠宇
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2019-08-02
Anticipated expiration: 2028-09-10

Abstract

The utility model relates to a kind of screw compressor, including crankshaft, eccentric part, rolling element and bearing outer ring, the eccentric part is connect with the crankshaft, and the lateral surface of the eccentric part is equipped with the first raceway；The rolling element is rotatably installed in first raceway；The bearing outer ring is socketed the rolling element.In above-mentioned screw compressor, the lateral surface of eccentric part is equipped with the first raceway, so that eccentric part and bearing outer ring form integral structure, there is no the big problem of operational vibration noise occur because taking transition or clearance fit to lead to the two contact-impact between excentric sleeve and Moving plate bearing.Therefore, when above-mentioned screw compressor works, vibration noise is small.

Description

Screw compressor

Technical field

The utility model relates to Compressor Technology fields, more particularly to a kind of screw compressor.

Background technique

In screw compressor, movable orbiting scroll and fixed scroll with scroll wrap are engaged with each other to form multiple compression chambers, and crankshaft drives Dynamic movable orbiting scroll is eccentrically rotated translation relative to fixed scroll, so that each compression chamber is mobile to central side and is gradually reduced volume, from And realize the compression of cavity fluid.Screw compressor is widely used in automobile system because it has the advantages that high efficiency, high-revolving Cold field of air conditioning.

Existing screw compressor shafting mostly uses excentric sleeve and Moving plate bearing to connect the crankshaft for transmitting power and dynamic whirlpool Disk.If excentric sleeve and Moving plate bearing take interference fit, need in assembly according to " excentric sleeve-Moving plate bearing-Moving plate " Sequence successively assembled, assemble flow is complicated, and assembly difficulty is larger；If excentric sleeve and Moving plate bearing take transition or Gap cooperation, when screw compressor works, the contact-impact between excentric sleeve and Moving plate bearing is compressor operating vibration noise Important sources.

Utility model content

Based on this, it is necessary to for the big problem of vibration noise, provide a kind of screw compressor that operational vibration noise is small.

A kind of screw compressor, including crankshaft, eccentric part, rolling element and bearing outer ring, the eccentric part and the crankshaft The lateral surface of connection, the eccentric part is equipped with the first raceway；The rolling element is rotatably installed in first raceway；Institute It states bearing outer ring and is socketed the rolling element.

In above-mentioned screw compressor, the lateral surface of eccentric part is equipped with the first raceway, so that eccentric part (similar bearing inner race) Integral structure is formed with bearing outer ring, there is no because taking transition or clearance fit to lead to two between excentric sleeve and Moving plate bearing Person's contact-impact and there is the big problem of operational vibration noise.Therefore, when above-mentioned screw compressor works, vibration noise is small.

The rolling element is needle roller, deep-groove ball ball, cylindrical roller, taper roller or tune in one of the embodiments, Heart roller.

When the rolling element is deep-groove ball ball, taper roller or aligning roller in one of the embodiments, the axis The inner peripheral surface of bearing outer-ring is equipped with the second raceway that cooperation is rolled with the rolling element.

Above-mentioned screw compressor further includes retainer in one of the embodiments, and the retainer is installed on described In one raceway, the rolling element is rotatably installed on the retainer.

The eccentric part is eccentric block in one of the embodiments, and the middle part of the eccentric block is equipped with through-hole, the song Axis is equipped with connecting hole corresponding with the through-hole, and the eccentric block is inserted into after the through-hole, the connecting hole in fact by fastener Now it is connect with the crankshaft.

Above-mentioned screw compressor further includes sequentially connected shell, fixed scroll and exhaust end in one of the embodiments, Lid is equipped with bracket between the shell and the fixed scroll, formed between the side of the bracket and the shell for installing The installation space of motor forms the low-voltage space for installing movable orbiting scroll between the other side of the bracket and the fixed scroll, One end of the crankshaft is connect with the motor, and the other end of the crankshaft passes through the bracket and connect with the eccentric part, institute Movable orbiting scroll is stated to be socketed the bearing outer ring and be screwed on the fixed scroll.

The junction of the shell and the fixed scroll is equipped with sealing element in one of the embodiments, and/or, it is described The junction of fixed scroll and the exhaust end cover is equipped with sealing element.

It is bolted between the shell and the fixed scroll in one of the embodiments, and/or, it is described quiet It is bolted between whirlpool disk and the exhaust end cover.

In one of the embodiments, the middle part of the bracket be equipped with inner concavity holding tank, the outer rim of the bracket with The fixed scroll connection.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of screw compressor described in an embodiment of the present invention；

Fig. 2 is the connection schematic diagram one of crankshaft and the eccentric part described in Fig. 1；

Fig. 3 is the connection schematic diagram two of crankshaft and the eccentric part described in Fig. 1；

Fig. 4 is a kind of three views of composite structure that eccentric part and bearing outer ring are formed in Fig. 1；

Fig. 5 is three views of another composite structure that eccentric part and bearing outer ring are formed in Fig. 1.

100, crankshaft, 110, connecting hole, 200, eccentric part, the 210, first raceway, 220, fastener, 230, through-hole, 240, Balance weight, 300, rolling element, 400, bearing outer ring, the 410, second raceway, 510, shell, 520, fixed scroll, 530, movable orbiting scroll, 540, exhaust end cover, 550, bracket, 551, holding tank, 560, motor, 570, sealing element, 580, bolt.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms It realizes, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making practical new to this The disclosure of type understands more thorough and comprehensive.

It should be noted that it can be directly to separately when an element is considered as " connection " another element One element may be simultaneously present centering elements.On the contrary, not deposited when element is referred to as " directly existing " another element "upper" In intermediary element." first " described in the utility model, " second " do not represent specific quantity and sequence, are only used for title Differentiation.

Fig. 1 is the structural schematic diagram of screw compressor described in an embodiment of the present invention.Fig. 2 shows crankshaft in Fig. 1 A kind of 100 installation schematic construction.Specifically, which includes crankshaft 100, eccentric part 200, rolling element 300 and axis Bearing outer-ring 400.Eccentric part 200 is connect with crankshaft 100, and the lateral surface of eccentric part 200 is equipped with the first raceway 210 (referring to Fig. 4)； Rolling element 300 is rotatably installed in the first raceway 210；Bearing outer ring 400 is socketed rolling element 300.

In conjunction with Fig. 4 and Fig. 5, in above-mentioned screw compressor, the lateral surface of eccentric part 200 is equipped with the first raceway 210, so that Eccentric part 200 (similar bearing inner race) forms integral structure with bearing outer ring 400, there is no because excentric sleeve and Moving plate bearing it Between take transition or clearance fit both to lead to contact-impact and the big problem of operational vibration noise occur.Therefore, above-mentioned vortex When compressor operating, vibration noise is small, high reliablity, and simplifies assemble flow, shortens assembly time and assembly cost.

In addition, traditional excentric sleeve and Moving plate bearing combined structure are compared, in above-mentioned screw compressor, eccentric part 200, Rolling element 300 and bearing outer ring 400 form integral structure, can reduce the quantity of components, and then reduce cost.Wherein, The stress moment changes the movable orbiting scroll 530 and fixed scroll 520 of screw compressor during the work time, eccentric part 200, rolling element 300 The bearing arrangement formed with bearing outer ring 400 can buffer movable orbiting scroll 530 and rotate bring vibration, reduce screw compressor work Vibration noise during work.

Specifically, in conjunction with Fig. 4 and Fig. 5, rolling element 300 is needle roller, deep-groove ball ball, cylindrical roller, taper roller or tune Heart roller.The rolling element 300 is using the common rolling element structure in bearing, convenient for buying and production.

Wherein, when rolling element 300 is deep-groove ball ball, taper roller or aligning roller, the inner circumferential of bearing outer ring 400 Face is equipped with the second raceway 410 (referring to Fig. 4) that cooperation is rolled with rolling element 300.When rolling element 300 is that needle roller and cylinder roll The period of the day from 11 p.m. to 1 a.m, the inner peripheral surface of bearing outer ring 400 is processable, can not also process corresponding second raceway 410.

Specifically, in conjunction with Fig. 4 and Fig. 5, above-mentioned screw compressor further includes retainer (not indicating in figure).Retainer installation In in the first raceway 210, rolling element 300 is rotatably installed on retainer.Retainer avoids rolling element 300 from skidding, so that 300 rotation of rolling element around eccentric part 200 without revolving.

Specifically, in conjunction with Fig. 3, eccentric part 200 is eccentric block.The middle part of eccentric block is equipped with through-hole 230, and crankshaft 100 is equipped with Connecting hole 110 corresponding with through-hole 230, eccentric block is realized after being inserted into through-hole 230, connecting hole 110 by fastener 220 and crankshaft 100 connections.Fastener 220 can be crank-pin, screw etc..The through-hole 230 of eccentric block designs the dismounting for being conducive to fastener 220. It is appreciated that referring to fig. 2, eccentric block can also understand by other means with crankshaft 100, for example be threadedly coupled etc..

Specifically, as shown in Figure 4 and Figure 5, eccentric part 200 is connected with balance weight 240.

Fig. 1 is combined in one of the embodiments, and above-mentioned screw compressor further includes sequentially connected shell 510, quiet Whirlpool disk 520 and exhaust end cover 540.Bracket 550, the side of bracket 550 and shell 510 are equipped between shell 510 and fixed scroll 520 Between form the installation space for installing motor 560, between the other side and fixed scroll 520 of bracket 550 formed for installing One end of the low-voltage space of movable orbiting scroll 530, crankshaft 100 is connect with motor 560, and the other end of crankshaft 100 is across bracket 550 and partially Heart part 200 connects, and movable orbiting scroll 530 is socketed bearing outer ring 400 and is screwed on fixed scroll 520.

Wherein, exhaust space is formed between fixed scroll 520 and exhaust end cover 540.Refrigerant is through the air inlet on shell 510 Pipe enters in shell 510, and after the compression that is screwed between movable orbiting scroll 530 and fixed scroll 520, enters after being transformed into high pressure gas It is then exhausted from exhaust space.

Specifically, the junction of shell 510 and fixed scroll 520 is equipped with sealing element 570, and/or, fixed scroll 520 and exhaust The junction of end cap 540 is equipped with sealing element 570.Sealing element 570 is conducive to improve the leakproofness of the screw compressor, avoids freezing Agent leakage.Sealing element 570 is chosen as gasket seal.

Specifically, it is connected between shell 510 and fixed scroll 520 by bolt 580, and/or, fixed scroll 520 and exhaust end It is connected between lid 540 by bolt 580.Be bolted be conducive to improve shell 510, fixed scroll 520 and exhaust end cover 540 it Between stable connection, reduce vibration.

Specifically, in conjunction with Fig. 3, the middle part of bracket 550 is equipped with the holding tank 551 of inner concavity, the outer rim of bracket 550 and quiet whirlpool Disk 520 connects.Wherein, holding tank 551 is used to install end, eccentric part 200 and the bearing outer ring 400 of crankshaft 100.Bracket 550 Play the role of support.Bracket 550 can be connect by bolt, screw etc. with fixed scroll 520.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims

1. a kind of screw compressor, which is characterized in that including crankshaft, eccentric part, rolling element and bearing outer ring, the eccentric part with The crankshaft connection, the lateral surface of the eccentric part are equipped with the first raceway；The rolling element is rotatably installed on described first In raceway；The bearing outer ring is socketed the rolling element.

2. screw compressor according to claim 1, which is characterized in that the rolling element is needle roller, deep-groove ball ball, circle Column roller, taper roller or aligning roller.

3. screw compressor according to claim 2, which is characterized in that the rolling element is deep-groove ball ball, circular cone rolling When son or aligning roller, the inner peripheral surface of the bearing outer ring is equipped with the second raceway that cooperation is rolled with the rolling element.

4. screw compressor according to claim 1, which is characterized in that further include retainer, the retainer is installed on In first raceway, the rolling element is rotatably installed on the retainer.

5. screw compressor according to claim 1, which is characterized in that the eccentric part is eccentric block, the eccentric block Middle part be equipped with through-hole, the crankshaft is equipped with connecting hole corresponding with the through-hole, and the eccentric block is inserted into institute by fastener It states and realizes after through-hole, the connecting hole and connect with the crankshaft.

6. according to claim 1 to screw compressor described in 5 any one, which is characterized in that further include sequentially connected shell Body, fixed scroll and exhaust end cover are equipped with bracket, the side of the bracket and the shell between the shell and the fixed scroll Between form the installation space for installing motor, between the other side of the bracket and the fixed scroll formed it is dynamic for installing The low-voltage space of whirlpool disk, one end of the crankshaft are connect with the motor, and the other end of the crankshaft passes through the bracket and institute Eccentric part connection is stated, the movable orbiting scroll is socketed the bearing outer ring and is screwed on the fixed scroll.

7. screw compressor according to claim 6, which is characterized in that the shell and the junction of the fixed scroll are set There is sealing element, and/or, the junction of the fixed scroll and the exhaust end cover is equipped with sealing element.

8. screw compressor according to claim 6, which is characterized in that pass through spiral shell between the shell and the fixed scroll It tethers and connects, and/or, it is bolted between the fixed scroll and the exhaust end cover.

9. screw compressor according to claim 6, which is characterized in that the middle part of the bracket is equipped with the receiving of inner concavity Slot, the outer rim of the bracket are connect with the fixed scroll.