CN103174648B - Screw compressor - Google Patents
Screw compressor Download PDFInfo
- Publication number
- CN103174648B CN103174648B CN201110431019.8A CN201110431019A CN103174648B CN 103174648 B CN103174648 B CN 103174648B CN 201110431019 A CN201110431019 A CN 201110431019A CN 103174648 B CN103174648 B CN 103174648B
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- China
- Prior art keywords
- drive shaft
- valve body
- valve
- screw compressor
- release channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
It is an object of the invention to provide a kind of screw compressor, its starting load is little.For realizing the screw compressor of described purpose, including: shell, there is suction muffler and discharge chamber；Movable orbiting scroll and fixed scroll, engagement forms compression chamber, and described movable orbiting scroll is driven by drive shaft；Back pressure cavity is formed between support, and the end plate of described movable orbiting scroll；Being characterized in: also include a release channel, this release channel is located in described drive shaft, connects described back pressure cavity and described suction muffler；Offering valve pocket in described drive shaft, set a centrifugal valve in this valve pocket, this centrifugal valve includes valve body and elastic reset part；This valve body keeps this release channel through when described drive shaft is static, and the centrifugal action produced when being rotated by described drive shaft, described valve body overcomes the reset force effect of described elastic reset part to move, to change the through area of described release channel in valve pocket.
Description
Technical field
The present invention relates to compressor, particularly relate to screw compressor.
Background technology
The compression assembly of scroll compressor includes movable orbiting scroll and fixed scroll, engages each other thus crosses multiple compression
Chamber.Fixed scroll keeps static, and movable orbiting scroll is by bent axle band action eccentric rotary, and peripheral compression chamber gradually moves to center
Volume-diminished simultaneously.
Can form a back pressure cavity at the movable orbiting scroll back side, the gas of this back pressure cavity is from discharge chamber, for being pushed away by movable orbiting scroll
To fixed scroll, to reduce the frictional force between movable orbiting scroll and support.
Back pressure cavity is one and seals space, and when the compressor is shut down, Pressure in Back-pressure Cavity cannot discharge in time, makes whirlpool
Dish and fixed scroll are still in impaction state；If restarted in the short time, load the biggest.
Summary of the invention
It is an object of the invention to provide a kind of screw compressor, its starting load is little.
For realizing the screw compressor of described purpose, including: shell, there is suction muffler and discharge chamber；Movable orbiting scroll with
Fixed scroll, engagement forms compression chamber, and described movable orbiting scroll is driven by drive shaft；Support, with the end plate of described movable orbiting scroll
Between formed back pressure cavity；Being characterized in: also include a release channel, this release channel is located in described drive shaft,
Connect described back pressure cavity and described suction muffler；Described drive shaft offers valve pocket, in this valve pocket, sets a centrifugal valve,
This centrifugal valve includes valve body and elastic reset part；This valve body keeps this release channel to pass through when described drive shaft is static
Logical, and the centrifugal action produced when being rotated by described drive shaft, described valve body overcomes described elasticity multiple in valve pocket
The position reset force effect of part and move, to change the through area of described release channel.
Described screw compressor, its further feature is that described centrifugal valve also includes valve seat, this elastic reset
Part is spring, and described valve seat is positioned at the outermost radial outside of drive shaft.
Described screw compressor, its further feature is, described spring in the raw time, described release
Passage is in opening.
Described screw compressor, its further feature is, described valve body in described valve pocket the direction of movement with
The axis of described drive shaft is vertical.
Described screw compressor, its further feature is, described valve seat and described drive shaft by screw thread or
Back-up ring is fixed, and described valve seat and/or described valve body are provided with the spring guiding mechanism of described spring.
Described screw compressor, its further feature is to offer interface channel on described valve body, makes described valve
The valve pocket at body two ends is through.
Described screw compressor, its further feature is, in described centrifugal valve, described spring is positioned at described valve
Between seat and described valve body.
Described screw compressor, its further feature is, described valve body periphery offers and can described release be led to
The annular groove that road is through.
Described screw compressor, its further feature is that the barycenter of described valve body is positioned at the axle of described drive shaft
Between line and described valve seat.
Described screw compressor, its further feature is, valve body inside diameter is less than outside diameter, connects logical
Road medial aperture is more than aperture, outside, and the release channel diameter in centrifugal valve upstream is less than diameters downstream.
When the compressor is operated, drive shaft rotary centrifugal force promotes valve body to be moved radially outward, and release is led to by valve body
Road is closed or is minimized by through area, makes back pressure cavity be maintained at the state of opposing seal；When compressor stops work
When making, drive shaft stops, and centrifugal force disappears, and valve body, under the effect of restoring force, is returned to open release channel
Position, makes the gas in back pressure cavity flow to suction muffler by release channel.According to the motion conditions of drive shaft, in time
Pressure in regulation back pressure cavity, therefore its starting load is little.
Accompanying drawing explanation
Fig. 1 is the structural representation of screw compressor.
Fig. 2 A is the close-up schematic view of the 1st embodiment in Fig. 1 at A.
Fig. 2 B is the close-up schematic view that in Fig. 1, A is in when rotating shaft operates.
Fig. 3 A is the close-up schematic view of the 2nd embodiment in Fig. 1 at A.
Fig. 3 B is the close-up schematic view that in Fig. 1, A is in when rotating shaft operates.
Fig. 4 A is the close-up schematic view of the 3rd embodiment in Fig. 1 at A.
Fig. 4 B is the close-up schematic view of the 4th embodiment in Fig. 1 at A.
Fig. 5 A is the close-up schematic view of the 5th embodiment in Fig. 1 at A, main display release channel by every
Disconnected state.
Fig. 5 B is the close-up schematic view of the 5th embodiment in Fig. 1 at A, and main display release channel is passed through
Logical state.
Detailed description of the invention
Embodiment 1
As it is shown in figure 1, screw compressor is by driving motor 1 to drive.Shell 20 crosses motor cavity 29 and accommodates motor,
The drive mechanism driven by motor 1 comprises drive shaft 2, eccentric 4, bearing 8.Compression mechanism comprises movable orbiting scroll
10 and fixed scroll 15, it engages each other thus crosses multiple compression chamber 27.The intermediate ends off-axis of drive shaft 2
Position stretch out crank 3, crank 3 inserts in the hole 5 of eccentric 4.Install successively outside eccentric 4 bearing 8,
The lining 11 at movable orbiting scroll 10 back side.Shell 20 is provided with air entry and air vent, and air entry is by air conditioner loop
Refrigerant gas be sucked into suction muffler 28, the middle part mounting bracket 21 of shell 20, drive shaft 2 is by support
Bearing 26 support rotating of 21 mesopores, crank 3 drives movable orbiting scroll 10 to make eccentric motion, when movable orbiting scroll 10 is subject to
When power shifts to support 21, the end face 22 of support 21 is relative with the end plate 16 of movable orbiting scroll 10, can be to end plate 16
Play a supportive role.The outermost layer of movable orbiting scroll 10 is suction muffler 28, from the outside cold-producing medium sucking low pressure of compressor.
When movable orbiting scroll 10 rotates, between movable orbiting scroll 10 and fixed scroll 15, form the compression chamber 27 of closing, and compression chamber
27 gradually inner layer move, reduce, thus compress cold-producing medium, cold-producing medium discharges high pressure from fixed scroll centre bore 19
Cold-producing medium, drains into discharge chamber 30, then is discharged to air conditioner loop by air vent.
Form back pressure cavity 31 between end plate 16 and the support 21 of movable orbiting scroll 10, Fig. 1 illustrates discharge chamber 30
Gases at high pressure cause back pressure cavity 31 through whirlpool dish feed path 17, to improve back pressure, back pressure acts on movable orbiting scroll
The end plate 16 of 10, makes movable orbiting scroll 10 produce moving axially or mobile trend to fixed scroll 15, to reduce dynamic whirlpool
Frictional force between end plate 16 and support 21 end face of dish 10, meanwhile, improves the sealing of each compression chamber 27,
The gases at high pressure reducing intermediate compression chamber 27 face out leakage from end of engagement.
Offering release channel in drive shaft 2, connect suction muffler 28 and back pressure cavity 31, release channel includes interconnecting mutually
One connect be parallel to axis direction extend first passage 6 and the second channel 7 vertical with first passage 6, first
Passage 6 is connected with back pressure cavity 31, and second channel 7 is connected with suction muffler 28.
As shown in Fig. 2 A, Fig. 2 B, drive shaft 2 is further opened with valve pocket 9, substantially vertical with axis.Valve pocket 9
Inside setting a centrifugal valve 40, centrifugal valve 40 includes valve body 41, spring 42 and valve seat 43, valve seat the most successively
43 are fixedly installed in valve pocket 9, and such as valve seat 43 excircle is with the interior spiral shell on external screw thread 42A, with valve pocket 9
Stricture of vagina 9A coordinates fixing.Valve seat 43 is positioned at outermost radial outside, and spring 42 is between valve seat 43 and valve body 41.
Valve body 41 is slidably disposed in valve pocket 9, and valve body 41 periphery offers can be by through for release channel 6,7
Annular groove 44, and the part of the both sides being positioned at annular groove 44 of valve body 41 coordinates with the inner wall sealing of valve pocket 9, therefore
Can just cut off by release channel 6,7.Be oppositely arranged on valve seat 43 and valve body 41 accommodate spring 42 recess 45,
46, can prevent spring 42 from rocking, constitute the guiding mechanism of spring 42.The barycenter of valve body 41 is positioned at drive shaft 2
Between axis and valve seat 43.
Under compressor halted state, in the raw, or spring 42 is in compressive state and valve body to spring 42
41 contact valve pocket 9 inside bottom, annular groove 44 is in just position to release channel 6,7, release channel 6,7
It is in breakthrough status.As shown in Figure 2 B, centrifugal action when the driven moving axis of valve body 41 2 rotates, at valve pocket 9
In move laterally, by compression, the through area of release channel 6,7 is changed spring 42, until minimum or close
Close, make back pressure cavity 31 be in the state of opposing seal.When compressor stops again, centrifugal action disappears, bullet
Spring 42 promotes valve body 41, annular groove 44 again to move to the position of release channel 6,7, and release channel 6,7 recovers
Through, back pressure declines in time.
Embodiment 2
As shown in Figure 3A, the difference with embodiment 1 is, valve body 41 is a cylinder, valve body 41 is arranged and leads
To boss 48, the diameter of boss 48 be less than valve body 41, therefore boss 48 release channel 6,7 is not risen every
Break and act on and play conducting effect.Valve seat 43 is fixed in valve pocket 9 by back-up ring 47, valve seat 43 inner side end
Contact with stage portion 9B of valve pocket 9.
Under compressor halted state, in the raw, valve body 41 is in the footpath of release channel 6,7 to spring 42
To inner side, boss 48 keeps release channel 6,7 to be in breakthrough status.As shown in Figure 3 B, valve body 41 is driven
Centrifugal action when moving axis 2 rotates, moves in valve pocket 9 laterally, spring 42 by compression, release channel 6,
The through area of 7 is changed, until minimum or closedown, makes back pressure cavity 31 be in the state of opposing seal.Work as pressure
Contracting machine stops again, and centrifugal action disappears, and spring 42 promotes valve body 41, and it is logical that boss 48 moves to release again
The position in road 6,7, release channel 6,7 recovers through, and back pressure declines in time.
Embodiment 3
As shown in Figure 4 A, the difference with embodiment 1 is, valve body 41 is offered interface channel 49, makes valve body 41
The valve pocket 9 of both sides is through.The pressure suffered by valve body 41 two ends is made to keep balance, so that the mobile master of valve body 41
By centrifugal force and spring force, valve body 41 is affected.
Embodiment 4
As shown in Figure 4 B, the difference with embodiment 3 is, interface channel 49 is by the radial direction of connection valve body 41 both sides
Passage is constituted with the vertical passage connecting annular groove 44 both sides.
Embodiment 5
As shown in Figure 5A, the difference with embodiment 3 is, valve body 41 inside diameter is less than outside diameter, connects
Passage 49 medial aperture is more than aperture, outside.The release channel 6,7 diameter in centrifugal valve 40 upstream is less than downstream
Diameter.
As shown in Figure 5 B during valve body 41 closes release channel 6,7, i.e. valve body 41 is moved through outwardly
Cheng Zhong, the side gas being relatively large in diameter flows out relatively slow, and this can delay valve body 41 to close release channel 6,7 speed.
As shown in Figure 5A, during valve body 41 opens release channel 6,7, owing to lateral opening 50 is relatively big, gas
Body easily passes through gap and the lateral opening outflow of side and the valve pocket 49 being relatively large in diameter, and therefore opening speed is not
Impacted.
In foregoing embodiments release channel can also along favour axis direction extend, be directly connected to suction muffler and
Back pressure cavity.
In foregoing embodiments, release channel 6,7 can also extend along the direction favouring axis, is directly connected to inhale
Air cavity 30 and back pressure cavity 31.
Claims (10)
1. a screw compressor, including:
Shell, has suction muffler and discharge chamber；
Movable orbiting scroll and fixed scroll, engagement forms compression chamber, and described movable orbiting scroll is driven by drive shaft；
Back pressure cavity is formed between support, and the end plate of described movable orbiting scroll；
It is characterized in that:
Also including a release channel, this release channel is located in described drive shaft, connects described back pressure cavity and described suction
Air cavity；Offering valve pocket in described drive shaft, set a centrifugal valve in this valve pocket, this centrifugal valve includes valve body and elasticity
Return unit；This valve body keeps this release channel through when described drive shaft is static, and when being rotated by described drive shaft
The centrifugal action produced, described valve body overcomes the reset force effect of described elastic reset part to move in valve pocket,
To change the through area of described release channel.
2. screw compressor as claimed in claim 1, it is characterised in that described centrifugal valve also includes valve seat,
This elastic reset part is spring, and described valve seat is positioned at the outermost radial outside of drive shaft.
3. screw compressor as claimed in claim 2, it is characterised in that described spring in the raw time,
Described release channel is in opening.
4. screw compressor as claimed in claim 1, it is characterised in that described valve body moves in described valve pocket
Dynamic direction is vertical with the axis of described drive shaft.
5. screw compressor as claimed in claim 2, it is characterised in that described valve seat leads to described drive shaft
Crossing screw thread or back-up ring is fixed, described valve seat and/or described valve body are provided with the spring guiding mechanism of described spring.
6. screw compressor as claimed in claim 1, it is characterised in that offer interface channel on described valve body,
The valve pocket making described valve body two ends is through.
7. screw compressor as claimed in claim 2, it is characterised in that in described centrifugal valve, described spring
Between described valve seat and described valve body.
8. screw compressor as claimed in claim 1, it is characterised in that described valve body periphery offers institute
State the annular groove that release channel is through.
9. screw compressor as claimed in claim 2, it is characterised in that the barycenter of described valve body is positioned at described
Between axis and the described valve seat of drive shaft.
10. screw compressor as claimed in claim 6, it is characterised in that from the footpath of described drive shaft always,
Valve body inside diameter is less than outside diameter, and interface channel medial aperture is more than aperture, outside, and release channel is at centrifugal valve
The diameter of upstream is less than diameters downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110431019.8A CN103174648B (en) | 2011-12-20 | 2011-12-20 | Screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110431019.8A CN103174648B (en) | 2011-12-20 | 2011-12-20 | Screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103174648A CN103174648A (en) | 2013-06-26 |
| CN103174648B true CN103174648B (en) | 2016-08-24 |
Family
ID=48634740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110431019.8A Expired - Fee Related CN103174648B (en) | 2011-12-20 | 2011-12-20 | Screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103174648B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859621B (en) * | 2017-10-31 | 2023-10-27 | 珠海格力电器股份有限公司 | Scroll compressor and air conditioner with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243388A (en) * | 1984-05-18 | 1985-12-03 | Hitachi Ltd | Scroll compressor |
| JPH02294584A (en) * | 1989-05-02 | 1990-12-05 | Matsushita Electric Ind Co Ltd | Scroll compressor |
| JPH11132165A (en) * | 1997-10-24 | 1999-05-18 | Hitachi Ltd | Scroll fluid machine |
| JP2001304146A (en) * | 2000-04-20 | 2001-10-31 | Fujitsu General Ltd | Scroll type compressor |
| JP2010096040A (en) * | 2008-10-15 | 2010-04-30 | Toyota Industries Corp | Scroll compressor |
| CN101761478A (en) * | 2008-12-24 | 2010-06-30 | 株式会社丰田自动织机 | Scroll compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100780382B1 (en) * | 2006-06-15 | 2007-11-29 | 학교법인 두원학원 | A scroll compressor improved in function of oil circulation and back pressure control |
-
2011
- 2011-12-20 CN CN201110431019.8A patent/CN103174648B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243388A (en) * | 1984-05-18 | 1985-12-03 | Hitachi Ltd | Scroll compressor |
| JPH02294584A (en) * | 1989-05-02 | 1990-12-05 | Matsushita Electric Ind Co Ltd | Scroll compressor |
| JPH11132165A (en) * | 1997-10-24 | 1999-05-18 | Hitachi Ltd | Scroll fluid machine |
| JP2001304146A (en) * | 2000-04-20 | 2001-10-31 | Fujitsu General Ltd | Scroll type compressor |
| JP2010096040A (en) * | 2008-10-15 | 2010-04-30 | Toyota Industries Corp | Scroll compressor |
| CN101761478A (en) * | 2008-12-24 | 2010-06-30 | 株式会社丰田自动织机 | Scroll compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103174648A (en) | 2013-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Shanghai City 200025 Madang Road No. 347 Applicant after: SANDEN HUAYU AUTOMOTIVE AIR-CONDITIONING CO., LTD. Address before: 200025 Shanghai city Luwan District Madang Road No. 347 Applicant before: Sandian Beier Automobile Air-Conditioner Co., Ltd., Shanghai |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20181220 |