CN101560982B - Annular balancing piston - Google Patents
Annular balancing piston Download PDFInfo
- Publication number
- CN101560982B CN101560982B CN 200910027975 CN200910027975A CN101560982B CN 101560982 B CN101560982 B CN 101560982B CN 200910027975 CN200910027975 CN 200910027975 CN 200910027975 A CN200910027975 A CN 200910027975A CN 101560982 B CN101560982 B CN 101560982B
- Authority
- CN
- China
- Prior art keywords
- piston
- piston ring
- annular groove
- groove
- bearing
- 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.)
- Active
Links
Images
Landscapes
- Compressor (AREA)
- Rotary Pumps (AREA)
Abstract
The invention relates to an annular balancing piston used in a bearing base at an exhaust end of an oil-jet screw compressor, an annular groove is formed on the outer circumference of the piston, a movable device in the annular groove is provided with a piston ring, and the outer diameter of the piston ring is larger than the outer diameter of the piston. As the annular groove is formed on the outer circumference of the piston and the movable device in the annular groove is provided with the piston ring, gap is existed between the annular groove and the piston ring; when in use, the piston ring and an inner cavity of the bearing base of a rotor are in close fit, the radial gap between the piston and the bearing base can be eliminated, pressure oil flows out through the gap between the annular groove and the piston ring, and the pressure in a pressure cavity of the bearing base is easy to ensure.
Description
(1) technical field
The present invention relates to a kind of annular balancing piston, be specially a kind of equalizing piston that is used in the fuel injection helical lobe compressor exhaust end bearing support.
(2) background technique
Fuel injection helical lobe compressor because of the structural feature of rotor helical-screw shape, in the process of engagement compression, axially can produce thrust at rotor when load operation.In order to reduce of the influence of this end thrust to bearing, improve the working life of bearing, generally in the exhaust end bearing support of compressor, add equalizing piston.
The equalizing piston structure of existing fuel injection helical lobe compressor is as shown in Figure 1, is made up of the pressure oil cavity A and the low pressure bearing bore B on rotor shaft bearing 4, equalizing piston 3 and equalizing piston 3 both sides.Among the figure, 1 is angular contact ball bearing, and 2 is roller bearing, and 5 is compressor drum.Form certain pressure when time among the pressure oil injection pressure oil pocket A, pressure oil flows into low pressure bearing bore B through the gap between equalizing piston 3 and the rotor shaft bearing 4 then.Because A, B have certain pressure difference between two chambeies, have formed the equilibrant in the opposite direction with rotor axial thrust, thereby have reduced the stressed of compressor shaft axial thrust bearing, the life-span of having improved thrust-bearing.
There is following problem in above-mentioned equalizing piston structure:
1, the radial clearance between equalizing piston 3 and the rotor shaft bearing 4 is bigger, and a large amount of pressure oil runs off through this gap, and it is not high that the pressure reduction on equalizing piston 3 both sides is carried, and equilibrant is little.
2, the manufacturing tolerances of the cylindrical of the endoporus of rotor shaft bearing 4 and equalizing piston 3 is bigger to the area effect of the annular that forms between them, makes the oil mass that flows through bearing change greatly, and is difficult to control.
(3) summary of the invention
The present invention is directed to the problems referred to above, a kind of annular balancing piston is provided, this piston can increase its equilibrant after being used for the exhaust end bearing support of fuel injection helical lobe compressor.
Technological scheme of the present invention is such: a kind of annular balancing piston is characterized in that: the excircle of said piston is provided with annular groove, and head has piston ring in the annular groove, and the external diameter of piston ring is greater than the external diameter of piston.
The further technological scheme of the present invention is: the piston external diameter of said annular groove both sides is unequal, is stepped shape; Said piston ring is provided with opening; The plane of said piston ring both sides is provided with the contract groove; The position of the contract groove of said piston ring both sides is corresponding; The quantity of the contract groove of said each side of piston ring is four; Said contract groove is uniformly distributed with on the plane of piston ring both sides; The cross section of said contract groove is a V-arrangement.
The outer peripheral surface of the present invention's piston is provided with annular groove; Head has piston ring in the annular groove, so has the gap between annular groove and the piston ring, drive fit between piston ring and rotor shaft bearing inner chamber during use; Can eliminate the radial clearance between piston and the bearing support; Pressure oil flows out through the gap between annular groove and the piston ring, and the pressure in the bearing support pressure chamber guarantees that easily equilibrant is bigger than equilibrium structure of the prior art.
The present invention's piston ring is provided with contract groove and opening, and the size of contract groove and opening is control easily all, therefore controls easily through the oil mass of bearing.
(4) description of drawings
Fig. 1 is the schematic representation of existing equalizing piston structure;
Fig. 2 is for using the partial structurtes sectional view of compressor of the present invention;
Fig. 3 is the sectional view of the piston among the present invention;
Fig. 4 is the plan view of the piston ring among the present invention;
Fig. 5 is the C-C sectional view among Fig. 4;
Fig. 6 is the D place enlarged view among Fig. 5.
(5) embodiment
See Fig. 2, be to use the partial structurtes of a kind of fuel injection helical lobe compressor of the present invention.Compressor drum 5 is assemblied on the rotor shaft bearing 4, is equipped with the roller bearing 2 of bearing radial force and the angular contact ball bearing 1 of bearing axial pushing force on the spindle nose of compressor drum 5 side by side.On the axle body of the compressor drum 5 between roller bearing 2 and rotor shaft bearing 4 sidewalls, be equipped with equalizing piston 3.Equalizing piston 3 is divided into two chambeies with the space between roller bearing 2 and rotor shaft bearing 4 sidewalls, is respectively pressure oil cavity A and low pressure bearing bore B.
The present invention is the improvement to the structure of above-mentioned equalizing piston 3.The excircle of piston 3 is provided with annular groove 8, and head has piston ring 6 in the annular groove 8, that is to say between annular groove 8 and the piston ring 6 to have the gap between piston ring 6 and the piston 3 slide relative is arranged.The external diameter of piston ring 6 is greater than the external diameter of piston 3, and during work, piston ring 6 is fitted with rotor shaft bearing 4 inner chambers under elastic force and function of friction and do not changeed.Piston ring 6 has been filled the radial clearance between piston 3 and the bearing support 4, and pressure oil flows out through the gap between annular groove 8 and the piston ring 6, and the pressure in the bearing support pressure chamber A guarantees that easily equilibrant is bigger than equilibrium structure of the prior art.
As shown in Figure 3, piston 3 external diameters of annular groove 8 both sides can be arranged to unequal, are stepped shape.During installation, big external diameter 7 is close to low pressure bearing bore B in low voltage side, can increase the area of contact of piston 3 and piston ring 6, reduces the specific contact pressure of piston 3 and piston ring 6; Little external diameter 9 is in the high pressure side, and contiguous pressure oil cavity A helps the installation of piston ring 6, and piston ring 6 is as long as very little amount of deformation just can be enclosed within on the piston 3.
Like Fig. 4～shown in Figure 6, piston ring 6 is provided with opening 11; The corresponding section, position is provided with contract groove 10 on the plane of piston ring 6 both sides.Contract groove 10 is uniformly distributed with on the plane of piston ring 6 both sides; The quantity of the contract groove 10 of each side is four or other quantity; The sectional shape of contract groove 10 can be circular arc, U-shaped, but is preferably V-arrangement.Owing on piston ring 6, have V-arrangement contract groove 10, the contract oil groove of similar plain thrust bearing makes between piston 3 and the piston ring 6 and forms oil film, and the pressure oil in the pressure oil cavity A can only flow to low pressure bearing bore B through contract groove on the piston ring 6 10 and opening 11.The size of contract groove 10 and opening 11 is control easily all, therefore controls easily from the oil mass of pressure oil cavity A entering low pressure bearing bore B.
Working principle of the present invention is: the pressure difference of pressure oil cavity A and low pressure bearing bore B acts on piston 3 and the piston ring 6; The axial force F 2 that the direction of the axial force F 1 that forms and rotor 5 are suffered in the opposite direction, axial force F 1 has played the effect of balance portion axial force F 2.
Claims (4)
1. annular balancing piston, it is characterized in that: the excircle of said piston is provided with annular groove, and head has piston ring in the annular groove, and the external diameter of piston ring is greater than the external diameter of piston; The piston external diameter of said annular groove both sides is unequal, is stepped shape; Said piston ring is provided with opening; The plane of said piston ring both sides is provided with the contract groove; The position of the contract groove of said piston ring both sides is corresponding.
2. annular balancing piston according to claim 1 is characterized in that: the quantity of the contract groove of said each side of piston ring is four.
3. annular balancing piston according to claim 1 is characterized in that: said contract groove is uniformly distributed with on the plane of piston ring both sides.
4. annular balancing piston according to claim 1 is characterized in that: the cross section of said contract groove is a V-arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910027975 CN101560982B (en) | 2009-05-12 | 2009-05-12 | Annular balancing piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910027975 CN101560982B (en) | 2009-05-12 | 2009-05-12 | Annular balancing piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101560982A CN101560982A (en) | 2009-10-21 |
| CN101560982B true CN101560982B (en) | 2012-12-19 |
Family
ID=41219917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910027975 Active CN101560982B (en) | 2009-05-12 | 2009-05-12 | Annular balancing piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101560982B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334927A (en) * | 2013-07-11 | 2013-10-02 | 烟台冰轮股份有限公司 | Semi-closed oil injection screw supercharger |
| DE102016224670A1 (en) * | 2016-12-12 | 2018-06-14 | Aktiebolaget Skf | Bearing assembly for supporting a screw compressor rotor and method for mounting a screw compressor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1075901B (en) * | 1957-05-09 | 1960-02-18 | Hydraulik Gmbh | Thrust bearing with load compensation for large thrust forces with at least two axial roller bearings |
| US4551072A (en) * | 1984-02-15 | 1985-11-05 | Hibar Systems Limited | Fluid pressure operated actuator |
| CN1043982A (en) * | 1988-12-02 | 1990-07-18 | 三电有限公司 | Have the lubricant oil of promotion and enter the piston ring of piston circular groove effect |
| CN2714885Y (en) * | 2004-06-25 | 2005-08-03 | 无锡压缩机股份有限公司 | Bearing soft pretightening and anti-rotating structure |
| CN2918861Y (en) * | 2005-12-31 | 2007-07-04 | 瓦房店轴承集团有限责任公司 | Traveling wheel seal structure |
| CN101158403A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Step-up gear box shaft seal |
| CN101158355A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Dry helical lobe compressor host rotor spindle rotor spindle sealing structure |
| CN101275675A (en) * | 2007-03-30 | 2008-10-01 | 阿耐思特岩田株式会社 | Shaft sealing device for oil-free rotary compressor |
| CN201448241U (en) * | 2009-05-12 | 2010-05-05 | 无锡压缩机股份有限公司 | Annular balance piston |
-
2009
- 2009-05-12 CN CN 200910027975 patent/CN101560982B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1075901B (en) * | 1957-05-09 | 1960-02-18 | Hydraulik Gmbh | Thrust bearing with load compensation for large thrust forces with at least two axial roller bearings |
| US4551072A (en) * | 1984-02-15 | 1985-11-05 | Hibar Systems Limited | Fluid pressure operated actuator |
| CN1043982A (en) * | 1988-12-02 | 1990-07-18 | 三电有限公司 | Have the lubricant oil of promotion and enter the piston ring of piston circular groove effect |
| CN2714885Y (en) * | 2004-06-25 | 2005-08-03 | 无锡压缩机股份有限公司 | Bearing soft pretightening and anti-rotating structure |
| CN2918861Y (en) * | 2005-12-31 | 2007-07-04 | 瓦房店轴承集团有限责任公司 | Traveling wheel seal structure |
| CN101275675A (en) * | 2007-03-30 | 2008-10-01 | 阿耐思特岩田株式会社 | Shaft sealing device for oil-free rotary compressor |
| CN101158403A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Step-up gear box shaft seal |
| CN101158355A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Dry helical lobe compressor host rotor spindle rotor spindle sealing structure |
| CN201448241U (en) * | 2009-05-12 | 2010-05-05 | 无锡压缩机股份有限公司 | Annular balance piston |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101560982A (en) | 2009-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8882360B2 (en) | Conical roller bearing device | |
| CN100368126C (en) | Small high-speed constant-pressure prepressing apparatus of main bearing | |
| CN101560982B (en) | Annular balancing piston | |
| CN201448241U (en) | Annular balance piston | |
| CN107725241A (en) | With the high pressure fuel pump for improving cam mechanism | |
| CN2865938Y (en) | Small size high-speed main-spindle bearing constant pressure prtightening device | |
| CN103696869B (en) | Rolling friction built-up piston | |
| CN109751328A (en) | A kind of cylinder roller bearing of novel retainer structure | |
| CN100480523C (en) | Clearance-free bearing | |
| CN202228361U (en) | Rolling rotor type compressor | |
| CN207086951U (en) | A kind of top adjustment spacer | |
| CN102398047A (en) | Precision movable center lubricated once | |
| CN208578797U (en) | A kind of buffering hydraulic cylinder | |
| CN102398048B (en) | Disposable lubrication replaceable built-in precise live center | |
| CN100540924C (en) | A kind of cycloid bearing | |
| CN206958091U (en) | Harmonic speed reducer flexible bearing | |
| CN201723360U (en) | No-heeling moment automatic compensation type high-pressure oil distributing mechanism | |
| CN201027809Y (en) | Integral floating bearing | |
| CN204437062U (en) | Integrated type floating bearing and wholly floating turbosupercharger | |
| CN201434013Y (en) | Bearing | |
| CN109737137A (en) | A kind of biserial roller angular contact bearing | |
| CN218347689U (en) | Improved bearing structure for spiral swing oil cylinder | |
| CN201093010Y (en) | Non-windage bearing | |
| CN1211592C (en) | Anti-vibration center-regulating roller bearing | |
| CN102011797B (en) | Micro flexible combined rolling bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 214145 No. 199, xixie Road, Hongshan street, Xinwu District, Wuxi City, Jiangsu Province Patentee after: Shengang Wuxi Compressor Co.,Ltd. Address before: 214145 Jiangsu city of Wuxi Province New Photoelectric Industrial Park Patentee before: WUXI COMPRESSOR Co.,Ltd. |
|
| CP03 | Change of name, title or address |