CN87103089A - The screw compressor of service intermittent - Google Patents
The screw compressor of service intermittent Download PDFInfo
- Publication number
- CN87103089A CN87103089A CN87103089.6A CN87103089A CN87103089A CN 87103089 A CN87103089 A CN 87103089A CN 87103089 A CN87103089 A CN 87103089A CN 87103089 A CN87103089 A CN 87103089A
- Authority
- CN
- China
- Prior art keywords
- gas compressor
- wallboard
- pressure end
- compressor
- end wall
- 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.)
- Withdrawn
Links
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention relates to a kind of screw compressor of service intermittent, preferably be used to automobile automatic brake system with air compressor.Generally be to start and throw off by the coupling that is connected the gas compressor drive unit.In addition, gas compressor can also drive by the motor that can start and stop of a separated type.The invention provides the simple and little solution that takes up space, by the wallboard (14) in the high pressure end wall (4) that is arranged on gas compressor along compressorshaft to recoil movement, the suction port (12) of gas compressor is connected, thus with the gas compressor complete discharge with high voltage terminal passage (12).
Description
The present invention relates to a kind of screw compressor of service intermittent, it comprises the compressor housings of a band casing wall, casing wall contain at least two on radial component ground the mutual pressing chambers of overlap joint, each pressing chamber be provided with a helical rotor and by a high pressure end wall and a low pressure end wall closed at both ends.
The gas compressor of this pattern can be advantageously used in the pressure in the pneumatic braking system of automobile is remained on the certain level.Gas compressor generally starts by a coupling after motor car engine is started or meshes, and just gas compressor is thrown off after the pressure in the brake system meets the requirements of numerical value.When needs, promptly when pressure drops to a certain given level, can mesh gas compressor again.The coupling of above-mentioned requirements is not only more expensive but also heavy, and works as and adopt the motor such as the motor of a separated type to come can save coupling under the situation of drive pressure mechanism of qi, finishes above-mentioned corresponding state with the starting and the parking of motor.But a kind of method in back neither a desirable solution, therefore also needs to improve in this respect.
The purpose of this invention is to provide a gas compressor, be specially adapted to service intermittent and be not subjected to tying down of above-mentioned drawback.
Gas compressor according to the present invention's design has reached this purpose, and the feature that is possessed will be stated in following claims.
By being arranged on whole function near the wallboard of the high pressure end wall of rotor tip, make it axially can move a very short distance, the pressing chamber of opening thus or break seal, make the air stream of the gas compressor of flowing through feed suction port on one side with recirculation, there is not actual loss like this, be that gas compressor is to be driven under the non-loaded or off position at air, until gas compressor needs engagement again.Again the engagement of gas compressor is to turn back to by the wallboard with above-mentioned high pressure end wall that its closed chamber position realizes, resetting of this wallboard preferably is issued at a controllable state, so that make the pressurized air can be reposefully and begin equably to produce.This wallboard can by in the oil cylinder cavity that is arranged in the high pressure end wall and an auxiliary piston device that is connected on this wallboard easily control.This set only needs to connect a hydraulic joint, so that exempt the necessity of the Machinery Control System that a cover tape guide axle sleeve is set in the high voltage terminal wallboard.
If rotor bearing only is arranged on the low pressure end of gas compressor, then the end of the rotor of the close high voltage terminal of gas compressor just can be fully straight, can make thus that wallboard becomes atresia and also be complete plane.
Because the gas compressor of this pattern generally will be connected with an injection system, provide a valve body in the embodiment with advantage of the present invention, the design of this valve body is axially to recall or retracted position in order to be positioned at when wallboard, when correspondingly gas compressor is in off position, the fluid that restraining flows into or even cut off the fluid supply fully.Because wallboard is in this position, the cooling of pressing chamber and sealing have not just needed.When gas compressor is in off working state, in fact lubricated also unnecessary.
Referring now to an exemplary embodiment accompanying drawings, the present invention is more specifically described, wherein:
Fig. 1 is the longitudinal sectional view by a gas compressor of the present invention's design,
Fig. 2 is a sectional view along II among Fig. 1-II line intercepting.
The gas compressor that describes with the present embodiment has a housing 1, and it comprises 2, one low pressure end walls 3 of a casing wall and a high pressure end wall 4.Be provided with two in the casing wall 2 at the pressing chamber 5,6 that radially overlaps mutually, each pressing chamber is equipped with rotor 7 and 8 respectively, all has intermeshing spirality tooth bar and groove on two rotors.In the embodiment of explanation usefulness, have 9,10, two axles of axle on the rotor 7,8 and all have bigger diameter, and be bearing in the bearing 11 that axially stretches out by low pressure end wall 3.
The gas compressor of diagram usefulness also is connected with a gas-entered passageway, as represented among Fig. 1 with dot and dash line 12, this gas-entered passageway is positioned at the top (not shown) of casing wall 2, also has outlet passage to be arranged in the bottom of casing wall 2 and high pressure end wall 4 and represents with dot and dash line 13 with Fig. 1.
The high pressure end wall comprises two parts, the i.e. front sheet 14 of first portion's one atresia of a flat shape, this front sheet is when gas compressor is in compressive state, then be close to hermetically on the planar ends surface of casing wall 2, also be close to simultaneously rotor 7, on the 8 flat end surfaces, and second portion is the device 15 of a calotte shape, and this device is firmly on the flange part that is installed in casing wall 2 end surfaces.
When wallboard 14 is return by illustrated position, then the high voltage terminal of space 16 and pressing chamber 5,6 is by passage 12 ' be connected with compressor air inlet machine mouth 12, therefore, air stream turns back to suction port 12 again through the groove of rotor, and just gas compressor is in inoperative and no-load condition.
Illustrated gas compressor is to belong to fluid is sprayed into type in the pressing chamber, its objective is to be cooling, and lubricated and sealing gas compressor is used.For this reason, an oil supply gallery 22 and many jets 23 all will be arranged on the casing wall 2.
Because when gas compressor when to be in off position be non-loaded, do not need oil spout in gas compressor, a deep hole 25 that intersects with oil supply gallery is set on casing wall, in this hole, be provided with the valve body that to control 24, when being in off position, fluid is cut off partially or completely when calming the anger.When gas compressor during in illustrated working state, the active force that overcomes spring 26 by wallboard 14 keeps valve body 24 to fill in the hole 25, so that allow fluid to flow through set on the valve body 24 that is arranged in passage 22 hole or annular groove.
On the other hand, when on the gas compressor when non-loaded, wallboard 14 is retracted in the space 16 a little, like this so that valve body 24 is outwards moved by the effect of spring 26, and oil supply gallery 22 is closed fully or almost completely.Like this, there is not or do not have basically fluid to spray into gas compressor, until one when giving load and acting on the gas compressor again.
Should understand the restriction that the present invention is not subjected to illustrated embodiment and description, propose various more remodeling in claims restricted portion but can below of the present invention, carry.For example the two ends of each rotor can be provided with bearing journal, and even now is done can increase the complexity that the wallboard 14 that is used for rotor shaft need be provided with closed hole.
Claims (4)
1, a kind of screw compressor is used for service intermittent and comprises a compressor housings (1), this housing comprises a casing wall (2), at least be provided with the pressing chamber (5 of two radial overlaps in this casing wall, 6) wherein each pressing chamber is respectively equipped with a helical rotor (7,8), be respectively equipped with a high pressure end wall (4) and a low pressure end wall (3) in two ends of each helical rotor, it is characterized in that: high pressure end wall (4) engages with a wallboard (14), when this wallboard is in the compression work state at gas compressor, with the end surface of casing wall (2) with sealing engagement, and purpose in order to be disengaged with gas compressor, this wallboard can carry out axial motion in the space (16) of high pressure end wall, and the suction port (12) of gas compressor is connected with passage (12 '), the motion of this wallboard realizes by an auxiliary drive (20).
2, gas compressor as claimed in claim 1 is characterized in that high pressure end wall (4) engages with an oil cylinder cavity (18), is provided with a piston (19) and is connected with wallboard (14) in oil cylinder (18), can move under the hydraulic oil effect.
3, gas compressor as claimed in claim 1 or 2 is characterized in that rotor (7,8) all is provided with the low pressure end (3) that axle (9,10) that axle journal (11) and tape spool hold only is arranged on gas compressor and locates; The end of the casing wall that sealing surfaces faced toward (2) of wallboard (14) is lid overcompression atresia and horizontal hermetically chamber.
4, require described gas compressor as any one of claim 1 to 3, engage a kind of device (22,23) be used for fluid is sprayed into pressing chamber (5,6), it is characterized in that: a valve body (24) is used for being in when being disengaged state with gas compressor when wallboard (14), and the fluid that enters pressing chamber is carried out throttling or cut-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103089 CN1012003B (en) | 1987-04-22 | 1987-04-22 | Intermittent service screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103089 CN1012003B (en) | 1987-04-22 | 1987-04-22 | Intermittent service screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87103089A true CN87103089A (en) | 1988-11-02 |
| CN1012003B CN1012003B (en) | 1991-03-13 |
Family
ID=4814286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87103089 Expired CN1012003B (en) | 1987-04-22 | 1987-04-22 | Intermittent service screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012003B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925189A (en) * | 2013-01-14 | 2014-07-16 | 斯瓦本冶炼厂汽车股份有限公司 | Gas Pump With Pressure Relief For Reducing Start-up Torque |
-
1987
- 1987-04-22 CN CN 87103089 patent/CN1012003B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925189A (en) * | 2013-01-14 | 2014-07-16 | 斯瓦本冶炼厂汽车股份有限公司 | Gas Pump With Pressure Relief For Reducing Start-up Torque |
| CN103925189B (en) * | 2013-01-14 | 2018-01-19 | 斯瓦本冶炼厂汽车股份有限公司 | For reducing the air pump with pressure release of starting torque |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1012003B (en) | 1991-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2005003B1 (en) | Improved vacuum pump | |
| KR19980080441A (en) | Piston pump | |
| CN100545019C (en) | Be used for using automatically and discharging the two-stage cylinder of the hand brake of guideway vehicle | |
| CA1197276A (en) | Auxiliary release device for a hydraulic pressure releasable brake | |
| EP0162222A2 (en) | Compressor inlet control device | |
| CN2913704Y (en) | Diverter valve | |
| US6849179B1 (en) | Internal filter | |
| CN1970372A (en) | Integral type manual hydraulic lifting device for driving cabin turn-over | |
| EP0248839B1 (en) | Intermittent service screw compressor | |
| CN87103089A (en) | The screw compressor of service intermittent | |
| JPH04296296A (en) | Central lubricant oiling device for car | |
| CA1284479C (en) | Fluid control valve | |
| US4424014A (en) | Power steering pump drive shaft seal area drain structure | |
| JPH05502841A (en) | Braking pressure control device for automotive hydraulic brake system | |
| CN2195679Y (en) | Central lubrication device for machines and vehicles | |
| CN110260141A (en) | A kind of electric grease lubricating pump | |
| EP0597610B1 (en) | Liquid pressure source unit for liquid-operated booster | |
| JPH05240152A (en) | Auxiliary hydraulic pump | |
| US4162615A (en) | Hydraulic fluid tank pressurization device | |
| US6053706A (en) | Oil pump with integrated oil metering device | |
| US6840042B1 (en) | Internal filter | |
| CN217273467U (en) | Two-stage press oil pump | |
| JPS6346714Y2 (en) | ||
| CN204755868U (en) | Vehicle automatic gearbox is with carrying fluid device | |
| US2234470A (en) | Valve mechanism for unloading compressors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |