CN108150417A - A kind of compressor slide valve of accessible movement - Google Patents
A kind of compressor slide valve of accessible movement Download PDFInfo
- Publication number
- CN108150417A CN108150417A CN201711331421.2A CN201711331421A CN108150417A CN 108150417 A CN108150417 A CN 108150417A CN 201711331421 A CN201711331421 A CN 201711331421A CN 108150417 A CN108150417 A CN 108150417A
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- China
- Prior art keywords
- piston chamber
- low pressure
- flow passage
- valve
- guiding valve
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of compressor slide valve of accessible movement, including：Guiding valve；Piston chamber, the guiding valve slidable fit make the integrated gas power that guiding valve is subject to during compressor operating be directed toward piston chamber wall surface always in being provided with low pressure flow passage slot on the inside of the piston chamber, the internal face of the piston chamber.The without hindrance mobile slide valve gear of the present invention by opening up low pressure flow passage slot on the internal face of piston chamber, can be effectively improved the problem of guiding valve is stuck and the two side walls of guiding valve both sides and piston chamber abrade, can improve helical-lobe compressor reliability of operation；Integrated gas power size and the direction that the slide valve gear of the present invention is subject to can accurately be calculated by the force calculation method of the present invention.
Description
Technical field
The invention belongs to technical field of refrigeration compressors, more particularly to a kind of compressor slide valve of accessible movement.
Background technology
In Spiral Lobe Refrigeration Compressor field, refrigerating capacity and cryogenic temperature usually need to adjust, i.e. the exhaust of refrigeration compressor
Amount or pressure at expulsion need to adjust.Common variable frequency adjustment in industry, can only adjust the flow of compressor, and in cannot adjusting
The pressure in enclosed volume is compressed, when cooling condition and condensing pressure are needed to increase or be reduced, closed compression volume can be caused
The appearances compression such as interior or overcompression, so in the cylinder of helical-lobe compressor, are generally provided with guiding valve to carry out flow and pressure
Adjusting, in addition guiding valve also have start when unloading function.The guiding valve of single screw compressor is opened up mounted on single screw compressor
Piston chamber in, be effectively compressed length by adjusting the screw rod and star-wheel of displacement, that is, adjustable compressor of the guiding valve in piston chamber
Degree, so as to control the displacement size of compressor.The guiding valve of double-screw compressor is mounted on the piston chamber that double-screw compressor opens up
It is interior, length is effectively compressed by adjusting what displacement of the guiding valve in piston chamber carried out adjusting screw rod compressor drum, so as to control spiral shell
The displacement size of bar compressor.
At present, it is stuck existing usually to there is guiding valve in a large amount of industrial practice, in single screw rod and double-screw compressor operation
As or guiding valve both sides and cylinder in the two side walls of piston chamber abrade phenomenon, and guiding valve stretches out cylinder during adjusting
It is more, more it is susceptible to stuck failure.Wherein, it is mostly absolutely because the cold and hot stuck spool valve of deformation of cylinder is external except a small number of
Since the gas pressure that the valve body back side is subject to is higher than the screw rod tooth socket gas pressure suffered by valve body front, the valve body back side, that is, valve body
Arc-shaped surface and valve chamber circular arc mating surface, valve body front, that is, valve body and the surface of screw rotor cooperation.Above-mentioned pressure differential causes valve
Body is generated there are one the very big thrust towards screw rotor direction, and guiding valve valve body both sides form wedge effect with piston chamber side
Power, two metal surfaces can generate very big contact, and guiding valve is during moving process by larger resistance, it is easy to quilt
Stuck and scratch.
Invention content
The purpose of the present invention is to provide a kind of compressor slide valve of accessible movement, to solve above-mentioned technical problem.This
Invention can reduce gas pressure in guiding valve back gap, and the thrust gas resultant force suffered by guiding valve can be made to be directed toward guiding valve cavity wall always
Face can make guiding valve realize without hindrance movement in moving process, can eliminate guiding valve by valve chamber two sides it is stuck the phenomenon that.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of compressor slide valve of accessible movement, including：
Guiding valve；
Piston chamber, the guiding valve slidable fit are provided on the inside of the piston chamber, the internal face of the piston chamber
Low pressure flow passage slot makes the integrated gas power that guiding valve is subject to during compressor operating be directed toward piston chamber wall surface always.
Further, the piston chamber is semicircular arc chamber.
Further, one end of the low pressure flow passage slot is closed end, and the other end is openend, and the low pressure flow passage slot is
U-shaped, N-shaped or Π types, the closed end of low pressure flow passage slot is towards the exhaust end of compresser cylinder, the openend direction of low pressure flow passage slot
The air-breathing extreme direction of compresser cylinder, the openend of low pressure flow passage slot are connected with the suction muffler of cylinder.
Further, the guide groove for being oriented to guiding valve is provided on the internal face of the piston chamber；It is described low
Through-flow slot is pressed as M types, one end of the low pressure flow passage slot is closed end, and the other end is openend, the closed end of low pressure flow passage slot
Towards the exhaust end of compresser cylinder, the openend of low pressure flow passage slot is towards the air-breathing extreme direction of compresser cylinder, low pressure flow passage
The openend of slot is connected with the suction muffler of cylinder, and the low pressure flow passage slot gets around the guide groove.
Further, the width of the low pressure flow passage slot is 2mm~5mm, and depth is 2mm~5mm；The low pressure flow passage slot
The spacing of end face at closed end and cylinder exhaust end be 3mm~8mm.
Further, the bottom surface of low pressure flow passage slot both sides along cylinder-bore axis direction center line respectively with piston chamber central shaft
Angle between the shortest route of line is 100 °~140 °.
Further, the gas pressure resultant force F that guiding valve front is subject togThe gas pressure resultant force F being subject to the guiding valve back sidedSymbol
It closes：1.2Fg≧Fd≧0.8Fg；The guiding valve back side is guiding valve arc-shaped surface and piston chamber circular arc mating surface, guiding valve front for guiding valve with
The surface of screw rotor cooperation.
Further, the admission pressure of helical-lobe compressor is Ps, pressure at expulsion Pd, take the mean pressure of intermediate compression process
Power is Pm, Ps＜ Pm＜ Pd；The projected area on heart face is S to the valve body of guiding valve in the cylinder, including with discharge chamber connected component
Valve body projected area S2And stay in the projected area S of the valve body of piston chamber 61, S1+S2=S；Valve body corresponds to different compression tooth sockets
Projected area be respectively SS；SmThe tooth socket projected area of valve body is corresponded in being carried out for compression process；SdAt the end of compression process
The tooth socket projected area of corresponding valve body；SS+Sm+Sd=S1；The direction that regulation is directed toward the gas force of piston chamber wall surface is positive direction,
The integrated gas power F that the valve body of guiding valve is subject in compressor operation is：
F=Pd·S2+(Pd-Ps)·Sd+(Pm-Ps)·Sm；
The integrated gas power F that guiding valve is subject to during compressor operating is directed toward piston chamber wall surface always.
Compared with prior art, the invention has the advantages that：
The without hindrance mobile slide valve gear of the present invention, by opening up low pressure flow passage slot on the internal face of piston chamber, can be reduced
Gas pressure in guiding valve back gap, it is ensured that the thrust gas resultant force that guiding valve is subject to is directed toward the wall surface side of piston chamber always
To guiding valve can be effectively improved during compressor operating, because by the thrust towards screw rotor direction, guiding valve is moved through
The problem of resistance is excessive in journey, and guiding valve is stuck and the two side walls of guiding valve both sides and piston chamber abrade, can improve helical-lobe compressor
Reliability of operation.
Description of the drawings
Fig. 1 is a kind of piston chamber schematic cross-sectional view of the compressor slide valve of accessible movement of the present invention；
Fig. 2 is the piston chamber schematic cross-sectional view of the compressor slide valve of another accessible movement of the present invention；
Fig. 3 is the piston chamber structure diagram of the compressor slide valve of another accessible movement of the present invention.
Fig. 4 is the structure diagram of guiding valve.
In Fig. 1 to Fig. 4：5 guiding valves；6 piston chambers；7 low pressure flow passage slots；9 guide grooves.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Referring to figs. 1 to Fig. 4, a kind of compressor slide valve of accessible movement of the invention is gentle including 5 guiding valves, piston chamber 6
Cylinder；Piston chamber 6 is semicircular arc chamber, and guiding valve slidable fit is in the inside of piston chamber 6, the internal face of compressor case piston chamber 6
On be provided with low pressure flow passage slot 7.Low pressure flow passage slot 7 is " Π " type, and the upper end of low pressure flow passage slot 7 is closed end, and lower end is two
Openend, the closed end of low pressure flow passage slot 7 is towards the exhaust end of cylinder, and the openend of low pressure flow passage slot 7 is towards the air-breathing of cylinder
Extreme direction, the openend of low pressure flow passage slot 7 are connected with the suction muffler of cylinder.The width of low pressure flow passage slot 7 be 2~5mm, depth
For 2~5mm, the spacing of the closed end of low pressure flow passage slot 7 and the end face at cylinder exhaust end is 3~8mm；7 both sides of low pressure flow passage slot
Center line of the bottom surface along cylinder-bore axis direction, respectively the angle between the shortest route of 6 central axis of piston chamber be 100~
140°.The gas pressure resultant force F that guiding valve front is subject togThe gas pressure resultant force F being subject to the guiding valve back sidedMeet：1.2Fg≧Fd
≧0.8Fg, the valve body back side, that is, valve body arc-shaped surface and piston chamber circular arc mating surface, valve body front, that is, valve body coordinate with screw rotor
Surface.
Referring to figs. 2 and 3, low pressure flow passage slot 7 is " M " type, and the upper end of low pressure flow passage slot 7 is closed end, and lower end is opening
End, the closed end of low pressure flow passage slot 7 is towards the exhaust end of cylinder, and the openend of low pressure flow passage slot 7 is towards the suction end side of cylinder
To the openend of low pressure flow passage slot 7 is connected with the suction muffler of cylinder, and low pressure flow passage slot 7 gets around the guide groove of piston chamber wall surface
9, low pressure flow passage slot 7 is not connected with guide groove 9.The width of low pressure flow passage slot 7 be 2~5mm, depth be 2~5mm, low pressure flow passage
The spacing of the closed end of slot 7 and the end face at cylinder exhaust end is 3~8mm；The bottom surface of 7 both sides of low pressure flow passage slot is along cylinder-bore axis side
To center line, the angle between the shortest route of 6 central axis of piston chamber is 100~140 ° respectively.Guiding valve front by
Gas pressure resultant force FgThe gas pressure resultant force F being subject to the guiding valve back sidedMeet：1.2Fg≥Fd≥0.8Fg.For above-mentioned
Guiding valve and piston chamber 6, in addition to the guide groove 9 of vertex position, the region of remaining and guiding valve ramps contact is not provided with any conduit,
The valve body back side, that is, valve body arc-shaped surface and valve chamber circular arc mating surface, valve body front, that is, valve body and the surface of screw rotor cooperation.
A kind of force calculation method of the compressor slide valve of accessible movement, includes the following steps：Step 01, guiding valve by
Active force comprehensive analysis；Step 02, the integrated gas power F's that guiding valve is subject to calculates；Step 03, determine that guiding valve is subject to comprehensive
The direction of gas force F is closed, integrated gas power is the resultant force of gas load that guiding valve is subject to.
In step 01, the gas load that guiding valve is subject to includes following components：Part is connected with the discharge chamber of cylinder
6 wall surface of piston chamber is directed toward in the active force for the pressure at expulsion born, direction；Pressure in each tooth socket is to the work of the valve body of guiding valve
Firmly, 6 wall surface of piston chamber is directed toward in direction；The arc-shaped outer surface of valve body of guiding valve is led to by the low pressure with the connection of the suction muffler of cylinder
Compression chamber is directed toward in gas load in chute 7, direction.
When compressor is in operating status, the computational methods of integrated gas power F that the valve body of guiding valve is subject in piston chamber 6
For：
The projected area connected on F=guiding valves with pressure at expulsion is multiplied by each tooth socket suffered on pressure at expulsion+guiding valve
Interior pressure is multiplied by corresponding stress projected area-guiding valve and is multiplied by pressure of inspiration(Pi) with the projected area in 6 contact surface of piston chamber；
After pressure at expulsion in the axial direction of guiding valve slideway, guiding valve subtracts pressure of inspiration(Pi), the cross-sectional area of guiding valve is multiplied by,
Air resistance when guiding valve is opened just is obtained, which is exactly the work that guiding valve is pushed to be overcome plus the frictional resistance of guiding valve
Firmly.
When compressor is adjusted to minimum discharge and minimum pressure at expulsion, guiding valve stretches out piston chamber 6 at most, at this point, stretching out
Guiding valve around all act on pressure at expulsion.
Assuming that the admission pressure of helical-lobe compressor is Ps, pressure at expulsion Pd, the average pressure for taking intermediate compression process is
Pm, Ps＜ Pm＜ Pd.The projected area on heart face is S to the valve body of guiding valve in the cylinder, including the valve body with discharge chamber connected component
Projected area S2And stay in the projected area S of the valve body of piston chamber 61, S1+S2=S.Valve body corresponds to the throwing of different compression tooth sockets
Shadow area is respectively SS：Compression process corresponds to the tooth socket projected area of valve body when will start；Sm：Compression process is corresponding in carrying out
The tooth socket projected area of valve body；Sd：The tooth socket projected area of valve body is corresponded at the end of compression process.SS+Sm+Sd=S1.Regulation refers to
Direction to the gas force of 6 wall surface of piston chamber is positive direction, by being analyzed before it is found that the valve body of guiding valve is in compressor operation
In the integrated gas power that is subject to be：F=Pd·S2+(Ps·Ss+Pm·Sm+Pd·Sd)-Ps·S1, after arrangement：F=Pd·S2+
(Pd-Ps)·Sd+(Pm-Ps)·Sm。
When compressor oepration at full load, S2=0, at this time the valve body of guiding valve be entirely located in piston chamber 6, what valve body was subject to
Integrated gas power F=(Pd-Ps)·Sd+(Pm-Ps)·Sm＞ 0, the integrated gas power that valve body is subject to are directed toward 6 wall surface of piston chamber；When
Compressor is under operating mode adjustment state when running, F=Pd·S2+(Pd-Ps)·Sd+(Pm-Ps)·Sm＞ 0, valve body are subject to comprehensive
It closes gas force and is directed toward 6 wall surface of piston chamber.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modification and variations of the present invention belong to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of compressor slide valve of accessible movement, which is characterized in that including：
Guiding valve；
Piston chamber (6), the guiding valve slidable fit are set on the inside of the piston chamber (6), the internal face of the piston chamber (6)
Low pressure flow passage slot (7) is equipped with, the integrated gas power that guiding valve is subject to during compressor operating is made to be directed toward piston chamber wall surface always.
A kind of 2. compressor slide valve of accessible movement according to claim 1, which is characterized in that the piston chamber (6)
For semicircular arc chamber.
A kind of 3. compressor slide valve of accessible movement according to claim 1, which is characterized in that the low pressure flow passage slot
(7) one end is closed end, and the other end is openend, and the closed end of low pressure flow passage slot (7) is towards the row of helical-lobe compressor cylinder
Gas end, the openend of low pressure flow passage slot (7) is towards the air-breathing extreme direction of helical-lobe compressor cylinder, the opening of low pressure flow passage slot (7)
End is connected with the suction muffler of cylinder.
A kind of 4. compressor slide valve of accessible movement according to claim 3, which is characterized in that the low pressure flow passage slot
(7) it is U-shaped, N-shaped or Π types.
A kind of 5. compressor slide valve of accessible movement according to claim 1, which is characterized in that the piston chamber (6)
Internal face on be provided with guide groove (9) for being oriented to guiding valve；The low pressure flow passage slot (7) be M types, the low pressure
One end of through-flow slot (7) is closed end, and the other end is openend, and the closed end of low pressure flow passage slot (7) is towards compresser cylinder
Exhaust end, the openend of low pressure flow passage slot (7) is towards the air-breathing extreme direction of compresser cylinder, the openend of low pressure flow passage slot (7)
It is connected with the suction muffler of cylinder, the low pressure flow passage slot (7) gets around the guide groove (9).
A kind of 6. compressor slide valve of accessible movement according to any one of claim 3 to 5, which is characterized in that institute
The width for stating low pressure flow passage slot (7) is 2mm~5mm, and depth is 2mm~5mm；The closed end and gas of the low pressure flow passage slot (7)
The spacing of the end face of cylinder exhaust end is 3mm~8mm.
A kind of 7. compressor slide valve of accessible movement according to claim 4 or 5, which is characterized in that low pressure flow passage slot
(7) bottom surface of both sides is along angle of the center line in cylinder-bore axis direction respectively between the shortest route of piston chamber central axis
100 °~140 °.
8. the compressor slide valve of a kind of accessible movement according to claim 1, which is characterized in that guiding valve front is subject to
Gas pressure resultant force FgThe gas pressure resultant force F being subject to the guiding valve back sidedMeet：1.2Fg≧Fd≧0.8Fg；The guiding valve back side is slides
Valve arc-shaped surface and piston chamber circular arc mating surface, guiding valve front are guiding valve and the surface of screw rotor cooperation.
9. a kind of compressor slide valve of accessible movement according to claim 1, which is characterized in that helical-lobe compressor into
Atmospheric pressure is Ps, pressure at expulsion Pd, the average pressure for taking intermediate compression process is Pm, Ps＜ Pm＜ Pd；The valve body of guiding valve is in gas
Projected area on cylinder median plane is S, including the valve body projected area S with discharge chamber connected component2And stay in piston chamber 6
The projected area S of valve body1, S1+S2=S；The projected area that valve body corresponds to different compression tooth sockets is respectively SS；SmFor compression process into
The tooth socket projected area of valve body is corresponded in row；SdThe tooth socket projected area of valve body is corresponded at the end of for compression process；SS+Sm+Sd=
S1；Regulation is directed toward the direction of the gas force of piston chamber (6) wall surface as positive direction, the valve body of guiding valve in compressor operation by
To integrated gas power F be：
F=Pd·S2+(Pd-Ps)·Sd+(Pm-Ps)·Sm；
The integrated gas power F that guiding valve is subject to during compressor operating is directed toward piston chamber wall surface always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331421.2A CN108150417A (en) | 2017-12-13 | 2017-12-13 | A kind of compressor slide valve of accessible movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331421.2A CN108150417A (en) | 2017-12-13 | 2017-12-13 | A kind of compressor slide valve of accessible movement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108150417A true CN108150417A (en) | 2018-06-12 |
Family
ID=62467336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711331421.2A Pending CN108150417A (en) | 2017-12-13 | 2017-12-13 | A kind of compressor slide valve of accessible movement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108150417A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5596392A (en) * | 1979-01-18 | 1980-07-22 | Hokuetsu Kogyo Co Ltd | Sealing device for sliding valve in oil cooling type screw compressor |
| JPS6258077A (en) * | 1985-09-06 | 1987-03-13 | Hitachi Ltd | Screw compressor |
| CN103527485A (en) * | 2012-07-02 | 2014-01-22 | 珠海格力电器股份有限公司 | Slide valve for screw compressor and screw compressor comprising same |
| CN203796569U (en) * | 2014-04-25 | 2014-08-27 | 珠海格力电器股份有限公司 | Screw compressor and machine body thereof |
-
2017
- 2017-12-13 CN CN201711331421.2A patent/CN108150417A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5596392A (en) * | 1979-01-18 | 1980-07-22 | Hokuetsu Kogyo Co Ltd | Sealing device for sliding valve in oil cooling type screw compressor |
| JPS6258077A (en) * | 1985-09-06 | 1987-03-13 | Hitachi Ltd | Screw compressor |
| CN103527485A (en) * | 2012-07-02 | 2014-01-22 | 珠海格力电器股份有限公司 | Slide valve for screw compressor and screw compressor comprising same |
| CN203796569U (en) * | 2014-04-25 | 2014-08-27 | 珠海格力电器股份有限公司 | Screw compressor and machine body thereof |
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Application publication date: 20180612 |