CN1012003B - Intermittent service screw compressor - Google Patents
Intermittent service screw compressorInfo
- Publication number
- CN1012003B CN1012003B CN 87103089 CN87103089A CN1012003B CN 1012003 B CN1012003 B CN 1012003B CN 87103089 CN87103089 CN 87103089 CN 87103089 A CN87103089 A CN 87103089A CN 1012003 B CN1012003 B CN 1012003B
- Authority
- CN
- China
- Prior art keywords
- compressor
- wallboard
- pressure end
- air compressor
- high pressure
- 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.)
- Expired
Links
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention relates to an intermittent service screw air compressor, which is preferably used in an automobile automatic braking system with an air compressor. Generally, the intermittent service screw air compressor starts and disengages via a coupling connected with a drive device of the air compressor. In addition, the air compressor can also be driven by a detachable motor which can start and stop the automobile. The present invention provides a solution, which is simple and occupied little space, that a wall panel (14) arranged in a high pressure end wall (4) of the air compressor returns along an axial direction of the air compressor, which enables an air inlet (12) of the air compressor to be communicated with a high pressure end channel (12'), and therefore, the air compressor is completely discharged.
Description
The present invention relates to a kind of screw compressor of service intermittent, it comprises the compressor housing 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 compressor of this pattern can be advantageously used in the pressure in the pneumatic braking system of automobile is remained on the certain level.Compressor generally starts by a coupling after motor car engine is started or meshes, and just 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 compressor again.The coupling of above-mentioned requirements is not only more expensive but also heavy, and works as under motor that adopts a separated type such as the situation that motor comes Driven Compressor, can save coupling, 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 compressor, be specially adapted to service intermittent and be not subjected to tying down of above-mentioned drawback.
According to the present invention, a kind of screw compressor of service intermittent, comprise a compressor housing, this housing comprises a casing wall, be surrounded by the pressing chamber of at least two radial overlaps in this casing wall, each pressing chamber is equipped with a helical rotor respectively, be respectively equipped with a low pressure end wall and a high pressure end wall in two ends of each helical rotor, the high pressure end wall comprises a movable wallboard, when this wallboard is in the compression work state at compressor, end surface sealing engagement with casing wall, the motion of this wallboard realizes by an auxiliary drive, it is characterized in that: the purpose of this activity wallboard in order to be disengaged with compressor, can in the space of high pressure end wall, carry out axial motion, and the high voltage terminal passage of space and pressing chamber is connected with the suction port of compressor.
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 compressor of flowing through feed suction port on one side with recirculation, there is not actual loss like this, be that compressor is to be driven under the non-loaded or off position at air, until compressor needs engagement again.Again the engagement of 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 compressor, then the end of the rotor of the close high voltage terminal of compressor just can be fully straight, can make thus that wallboard becomes atresia and also be complete plane.
Because the 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 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 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 compressor of the present invention's design,
Fig. 2 is a sectional view along II among Fig. 1-II line intercepting.
The 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 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 the first portion-atresia of a flat shape, this front sheet is when 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 fixedly mounted on the flange part of 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 inlet 12, therefore, air stream turns back to suction port 12 again through the groove of rotor, and just compressor is in inoperative and no-load condition.
Illustrated compressor is to belong to fluid is sprayed into type in the pressing chamber, its objective is to be cooling, lubricated and hermetic compressors.For this reason, an oil supply gallery 22 and many jets 23 all will be arranged on the casing wall 2.
Because when compressor when to be in off position be non-loaded, do not need oil spout in 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 compressor is in off position, fluid is cut off partially or completely.When 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 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 compressor, when a load acts on the 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 of service intermittent, comprise a compressor housing (1), this housing comprises a casing wall (2), be surrounded by the pressing chamber (5 of at least two radial overlaps in this casing wall, 6), each pressing chamber is equipped with a helical rotor (7 respectively, 8), be respectively equipped with a low pressure end wall (3) and a high pressure end wall (4) in two ends of each helical rotor, high pressure end wall (4) comprises a movable wallboard (14), when this wallboard is in the compression work state at compressor, end surface sealing engagement with casing wall (2), the motion of this wallboard realizes by an auxiliary drive (20), it is characterized in that: the purpose of this activity wallboard (14) in order to be disengaged with compressor, can in the space (16) of high pressure end wall, carry out axial motion, and the high voltage terminal of space (16) and pressing chamber (5,6) is connected with the suction port (12) of compressor by passage (12 ').
2, 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, 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 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 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 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 CN87103089A (en) | 1988-11-02 |
| CN1012003B true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013200410B4 (en) * | 2013-01-14 | 2017-12-07 | Schwäbische Hüttenwerke Automotive GmbH | Gas pump with pressure relief to reduce the starting torque |
-
1987
- 1987-04-22 CN CN 87103089 patent/CN1012003B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87103089A (en) | 1988-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4738595A (en) | Hydraulic pump with integrated sump and accumulator | |
| KR100538333B1 (en) | Pumping device for supplying fuel from the fuel tank to the internal combustion engine | |
| US4652216A (en) | Compressor inlet control device | |
| CA1197276A (en) | Auxiliary release device for a hydraulic pressure releasable brake | |
| CN100545019C (en) | Be used for using automatically and discharging the two-stage cylinder of the hand brake of guideway vehicle | |
| US6786709B1 (en) | Gear pump with a drive and a hydraulic tank | |
| US6849179B1 (en) | Internal filter | |
| CN1970372A (en) | Integral type manual hydraulic lifting device for driving cabin turn-over | |
| US4428195A (en) | Rotary vacuum pump | |
| EP0248839B1 (en) | Intermittent service screw compressor | |
| CN1012003B (en) | Intermittent service screw compressor | |
| CN1008256B (en) | Hydraulic brake booster | |
| JPH04296296A (en) | Central lubricant oiling device for car | |
| US4424014A (en) | Power steering pump drive shaft seal area drain structure | |
| US5302011A (en) | Braking pressure control device for a hydraulic automotive vehicle brake system | |
| CN2195679Y (en) | Central lubrication device for machines and vehicles | |
| CN110397485A (en) | Engine oil pump | |
| US5207567A (en) | Pump with integral sump | |
| EP0597610B1 (en) | Liquid pressure source unit for liquid-operated booster | |
| US6840042B1 (en) | Internal filter | |
| US6053706A (en) | Oil pump with integrated oil metering device | |
| CN204755868U (en) | Vehicle automatic gearbox is with carrying fluid device | |
| JPS6346714Y2 (en) | ||
| CN215928180U (en) | Clutch power assisting device and commercial vehicle | |
| CN217273467U (en) | Two-stage press oil pump |
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 | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |