CN209195714U - A kind of sliding valve structure of oil-injecting screw rod compressor - Google Patents
A kind of sliding valve structure of oil-injecting screw rod compressor Download PDFInfo
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- CN209195714U CN209195714U CN201822139603.6U CN201822139603U CN209195714U CN 209195714 U CN209195714 U CN 209195714U CN 201822139603 U CN201822139603 U CN 201822139603U CN 209195714 U CN209195714 U CN 209195714U
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- slide valve
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Abstract
A kind of sliding valve structure of oil-injecting screw rod compressor, compressor includes cylinder block, screw rotor, air-breathing end cap, exhausting end base and sliding valve structure, sliding valve structure is placed in cylinder block, in the piston chamber being located at below screw rotor that air-breathing end cap and exhausting end base are constituted, feature: sliding valve structure includes slide valve application cylinder end cap, slide valve lever, adjustment axis, slide valve application cylinder, slide valve, control piston, slide valve positioning pin, slide valve application cylinder is fixed in piston chamber, the fixed one end for being set in slide valve lever of the control piston being placed in slide valve application cylinder, slide valve lever stretches out the other end of slide valve application cylinder and slide valve is rigidly connected.Hub setting is equipped with adjustment axis in slide valve lever, helicla flute is offered on adjustment axis outer ring, the slide valve positioning pin that can be protruded into helicla flute is installed on slide valve spindle, and slide valve spindle is mobile, slide valve positioning pin also moves and adjustment axis is driven to rotate, and the rotation angle of adjustment axis reflects the position of slide valve.Advantage: capacity regulating range is wide and adjusts accurately, and compact-sized, occupied area is small.
Description
Technical field
The utility model belongs to air compressor machine capacity modulation technique field, and in particular to a kind of slide valve of oil-injecting screw rod compressor
Structure.
Background technique
Slide valve is a kind of structural detail for being used to volume adjusted flow in helical-lobe compressor, and slide valve is located at not within the compressor
With position when, the length of screw rotor sealing is also corresponding different, to be admitted to sealing in screw rotor rotary course
The gas flow of compression chamber is also different, and the by-pass port that the sucking gas outside seal section then passes through below body is back to air-breathing
End can achieve the purpose that adjusting by sliding valve structure and change compressor displacement.
The slide valve in industry mostly uses greatly two pressurization interfaces and two pressure release interfaces at present, and then realizes 50%, 75% and
100% three-stage control mode.This control mode has the shortcomings that span deviation is big, cause capacity regulating control not in time,
Inaccuracy.In addition, the exhaust end of compressor is arranged in slide valve, there is one section can protrude from compressor, increase accounting for for compressor
Use space.Therefore one kind will be developed by, which being badly in need of, adapts to real-time working condition, and adjustable range is wide and degree of regulation is high, while main machine structure is more
It is compact, the small sliding valve structure of area occupied.
In view of above-mentioned prior art, the applicant has made beneficial design, technical solution described below be
It is generated under this background.
Summary of the invention
The task of the utility model is to provide for a kind of sliding valve structure of oil-injecting screw rod compressor, the range of capacity regulating
For the 25%-100% of helical-lobe compressor at full capacity, the step-less adjustment of capacity regulating slide valve is realized；By the way that slide valve is set to
Air-breathing end side, it is only necessary to a pressurization interface and pressure release interface, in addition displacement sensor, realizes reliable and stable and accurate compression
Machine displacement, simple and compact for structure, occupied area is small.
The task of the utility model is done in such a way that a kind of sliding valve structure of oil-injecting screw rod compressor, the oiling
Screw rotor that helical-lobe compressor includes cylinder block, is placed in cylinder block and compressed to gas is located at cylinder block suction end
The air-breathing end cap of side, exhausting end base and sliding valve structure positioned at cylinder block exhaust end side, the sliding valve structure are placed in gas
In the piston chamber being located at below screw rotor that cylinder body, air-breathing end cap and exhausting end base are constituted, it is characterised in that: the slide valve
Structure includes slide valve application cylinder end cap, slide valve lever, adjustment axis, slide valve application cylinder, slide valve, controls piston, slide valve positioning pin, described
Slide valve application cylinder be fixed in piston chamber, stretch out compressor body cylinder on offer pouring orifice and drain tap, and cylinder
Slide valve application cylinder end cap is installed, the slide valve lever and control piston are placed in slide valve application cylinder, the control on mouthful
The fixed one end for being set in slide valve lever of piston, the slide valve lever stretches out the other end of slide valve application cylinder and slide valve is rigidly connected,
Hub setting is equipped with adjustment axis in the slide valve lever, offers helicla flute on the adjustment axis outer ring, on the slide valve lever
Slide valve positioning pin is installed, the slide valve positioning pin is pierced by slide valve lever and protrudes into the helicla flute in adjustment axis, works as slide valve lever
When moving left and right, slide valve positioning pin also moves left and right and adjustment axis is driven to rotate, and the rotation angle of adjustment axis reflects slide valve
Position.
In a specific embodiment of the utility model, displacement sensing is installed on the slide valve application cylinder end cap
The rotation angle of adjustment axis is fed back to control system by device, the displacement sensor.
In another specific embodiment of the utility model, the slide valve positioning pin is located at slide valve lever and control is lived
On the part for filling in cooperation.
In another specific embodiment of the utility model, described adjustment axis one end is by adjusting axle bearing hub setting
In on the inner hole of slide valve application cylinder end cap.
In another specific embodiment of the utility model, the slide valve application cylinder is fixedly connected with air-breathing end cap
And sliding valve structure is made to be positioned at air-breathing end side.
In the utility model there are one in specific embodiment, the slide valve application cylinder protrudes into the cylinder in piston chamber
End is located at screw rotor at 1/4 rotor length of suction end.
In a specific embodiment in turn of the utility model, the sliding valve structure further includes mutually matched limit
Position spring and spacer pin, the limit spring are installed on slide valve towards in the spring eye opened up on the face of exhaust end, described
Spacer pin be installed on exhausting end base, the effect of the limit spring and spacer pin is to prevent slide valve from crossing position to exhaust end
It moves.
In the utility model more and in a specific embodiment, the sliding valve structure further includes slide valve guide rail, institute
The slide valve guide rail stated and cylinder block are rigidly connected and are placed horizontally in cylinder block, the slide valve in displacement process with slide valve
Guide rail contact and then relative level sliding.
Again and then in a specific embodiment, draining is devised on the baseplane of the slide valve in the utility model
Slot, the effect of the drain pan be in the opposite sliding process for reduce slide valve and slide valve guide rod, oil generation between the two
Resistance.
The utility model one of has the advantage that the range of capacity regulating is screw rod due to the above structure,
The 25%-100% of compressor at full capacity, realizes the step-less adjustment of capacity regulating slide valve.Entire sliding valve structure only needs one
Pressurize interface and pressure release interface, in addition displacement sensor, can be realized any adjusting of compressor slide valve, and the adjusting of slide valve
High sensitivity, adjusting position is accurate, and structure is simple；Two, sliding valve structure design keeps main machine structure design tighter in air-breathing end side
It gathers, solves slide valve protrusion, the big problem of area occupied.
Detailed description of the invention
Fig. 1 be sliding valve structure described in the utility model in full-shut position, that is, maximum load state when structural representation
Figure.
Fig. 2 is the schematic diagram of sliding valve structure described in the utility model.
Fig. 3 is the partial enlarged view of sliding valve structure described in the utility model.
Fig. 4 be sliding valve structure described in the utility model in full-gear, that is, minimum load state when structural representation
Figure.
In figure: 1. displacement sensors；2. vibration-damping screw nail；3. slide valve application cylinder end cap；4. drain tap；5. slide valve lever；6. adjusting
Nodal axisn, 61. helicla flutes；7. slide valve application cylinder；8. elastic washer；9. nut；10. slide valve guide rail；11. spacer pin；12. exhaust end
Seat；13. cylinder block；14. limit spring；15. screw rotor；16. slide valve；17. piston chamber；18 air-breathing end caps；19. control is lived
Plug；20. slide valve positioning pin；21. pouring orifice；22. round nut；23. adjusting axle bearing.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, but is not pair to the description of embodiment
The limitation of technical solution, any change in the form rather than substance according to the utility model design all should be considered as the utility model
Protection scope.
The concept of all directionality for being related to upper, lower, left, right, front and rear or directionality is all in the following description
On the basis of position shown in FIG. 1, thus the special limit to technical solution provided by the utility model cannot be understood as
It is fixed.
The utility model relates to a kind of sliding valve structure of oil-injecting screw rod compressor, the oilings referring to FIG. 1 to FIG. 4,
Screw rotor 15 that helical-lobe compressor includes cylinder block 13, is placed in cylinder block 13 and compressed to gas is located at cylinder block
The air-breathing end cap 18 and exhausting end base 12 and sliding valve structure of 13 two sides.18 He of air-breathing end cap of the cylinder block 13 and its two sides
The piston chamber 17 positioned at 15 lower section of screw rotor is offered on exhausting end base 12, the sliding valve structure is installed on piston chamber 17
In.One end positioned at the air-breathing end cap 18 in left side is the suction end of compressor, and one end positioned at the exhausting end base 12 on right side is pressure
The exhaust end of contracting machine.The sliding valve structure includes displacement sensor 1, slide valve application cylinder end cap 3, slide valve lever 5, adjustment axis 6, slides
Valve application cylinder 7, spacer pin 11, limit spring 14, slide valve 16, control piston 19, slide valve positioning pin 20, is adjusted slide valve guide rail 10
Axle bearing 23 etc..The slide valve application cylinder 7 is fastened on air-breathing end cap 18, and one end protrudes into piston chamber 17 to screw rod
At 1/4 rotor length of suction end, the other end is fixedly connected rotor 15 with air-breathing end cap 18, stretches out air-breathing end cap 18
Cylinder on offer pouring orifice 21 and drain tap 4, and slide valve application cylinder end cap 3 is installed on nozzle.The slide valve lever 5 is set
It is arranged with the control piston 19 being equally placed in slide valve application cylinder 7 in slide valve application cylinder 7, being located on one end of suction end,
And it is rigidly mounted on slide valve lever 5 with round nut 22 by piston 19 is controlled.The slide valve lever 5 stretches out one end of slide valve application cylinder 7
It is rigidly connected with slide valve 16 by elastic washer 8 and nut 9.Drain pan is devised on the baseplane of the slide valve 16, and bottom is flat
Face and 10 flat contact of slide valve guide rail.The slide valve guide rail 10 and cylinder block 13 is rigidly connected and is placed horizontally at cylinder block 13
It is interior.In the opposite sliding process of slide valve 16 and slide valve guide rod 10, oil between the two can generate resistance, the work of the drain pan
With the resistance for being reduction oil.The slide valve 16 is towards offering spring eye, installation in the spring eye on the face of exhaust end
There is limit spring 14, the limit spring 14 cooperates with the spacer pin 11 being installed on exhausting end base 12, the limit bullet
The effect of spring 14 and spacer pin 11 is to prevent slide valve 16 from crossing displacement to exhaust end.The slide valve application cylinder end cap 3 and control is lived
Oil pocket is formed between plug 19 and slide valve application cylinder 7, the gap between the slide valve application cylinder 7 and slide valve 16 is by-pass port, when
Oil is injected into oil pocket and control 19 two sides of piston are there are when pressure difference, and control piston 19 moves, to pass through 5 band of slide valve lever
Movable pulley 16 is moved left and right along the axis extending direction of screw rotor 15, because the effective length of slide valve 16 is rotor total length
75%, change effective active length of screw rotor 15 between 25%-100% rotor length, to realize capacity tune
The range of section is the 25%-100% of helical-lobe compressor at full capacity, achievees the purpose that adjusting screw rod compressor displacement.This structure
In, slide valve application cylinder 7 is located at 18 lower section of air-breathing end cap, piston chamber of the slide valve 16 in the lower section of screw rotor 15 and exhausting end base 12
It inside moves left and right, entire sliding valve structure does not protrude from compressor body, reduces the outer dimension of compressor, reduces land occupation face
Product.
As shown in Figures 2 and 3, institute's displacement sensors 1 are connect with slide valve application cylinder end cap 3 by vibration-damping screw nail 2.It is described
Slide valve lever 5 in adjustment axis 6 is installed, helicla flute 61, described 6 one end of adjustment axis are offered on 6 outer ring of adjustment axis
By adjusting 23 hub setting of axle bearing on the inner hole of slide valve application cylinder end cap 3.What the slide valve lever 5 and control piston 19 cooperated
The hole of installation slide valve positioning pin 20 is offered on part, the slide valve positioning pin 20 is pierced by slide valve lever 5 and protrudes into adjustment axis 6
Helicla flute 61 in, when slide valve lever 5 moves left and right, slide valve positioning pin 20 also move left and right and drive adjustment axis 6 rotate, adjust
The rotation of axis 6 is presented by displacement sensor 1.The effect of adjustment axis 6 and the slide valve positioning pin 20 is by the straight of slide valve 16
Line movement is converted into rotary motion and motion information is sent to control system by displacement sensor 1, refers to make adjusting
It enables.
Please continue to refer to Fig. 1 and Fig. 4, the action process of the sliding valve structure of oil-injecting screw rod compressor described in the utility model
It is as follows:
Compressor first starts oil pump before unlatching, is entered by pouring orifice 21, and oil pressure is higher than inside compressor in oil pocket
Pressure, high pressure oil push control piston 19 to move right, are prolonged with movable pulley 16 along the axis of screw rotor 15 by slide valve lever 5
It is mobile to exhaust end to stretch direction, until slide valve 16 is pushed into full-gear, as shown in figure 4,15 suction side of screw rotor at this time
Effective active length is 25% rotor length, with exhaust side among form hollow state, by-pass port reaches maximum, exhaust side
The enclosed volume that is formed with screw rotor 15 of slide valve 16 do not completely enclose, so the pressure very little formed, therefore this is also most
Small load condition.Limit spring 14 contacts with each other with spacer pin 11 at this time, and limit spring 14 generates reaction force, and then prevents
Slide valve 18 is further mobile.In moving process, under the drive of slide valve positioning pin 20 phase occurs the slide valve 16 for adjustment axis 6
To rotation.In moving process, the angle that adjustment axis 6 rotates is fed back on displacement sensor 1 and is sent to control by electric signal
System, the fuel cut-off after full stroke are closed pouring orifice 21 by solenoid valve.Compressor after running for a period of time, cylinder
Pressure in body 13 is set up, and according to needed for client's actual flow, opens drain tap 4, control 19 two sides of piston form pressure
Difference, 13 air pressure inside of cylinder block are higher than oil pressure, are high-pressure side, control piston 19 is mobile to low-pressure side, and adjustment axis 6 is in slide valve at this time
Relative rotation occurs under the drive of positioning pin 20, the angle that adjustment axis 6 rotates is fed back on displacement sensor 1, control system root
The aperture of sliding valve structure is obtained according to displacement sensor 1, and then controls compressor flowrate, and final compressor flowrate adjusting is arrived
The actual flow of customer requirement.If customer requirement full load is run, continue to open drain tap 4,13 exhaust side of cylinder block is formed
Air pressure inside push control piston 19 slide to the left to be contacted with slide valve application cylinder 7 up to slide valve 16, as shown in Figure 1, sliding at this time
The aperture of valve arrangement is minimum, and effective active length of screw rotor 15 is maximum, reaches oepration at full load.
Claims (9)
1. a kind of sliding valve structure of oil-injecting screw rod compressor, the oil-injecting screw rod compressor includes cylinder block (13), is placed in gas
The screw rotor (15) that is compressed in cylinder body (13) and to gas, the air-breathing end cap for being located at cylinder block (13) suction end side
(18), the exhausting end base (12) and sliding valve structure, the sliding valve structure positioned at cylinder block (13) exhaust end side are placed in cylinder
In the piston chamber (17) being located at below screw rotor (15) that body (13), air-breathing end cap (18) and exhausting end base (12) are constituted,
Be characterized in that: the sliding valve structure includes slide valve application cylinder end cap (3), slide valve lever (5), adjustment axis (6), slide valve application cylinder
(7), slide valve (16), control piston (19), slide valve positioning pin (20), the slide valve application cylinder (7) are fixed on piston chamber (17)
In, it stretches out on the cylinder of compressor body and offers pouring orifice (21) and drain tap (4), and slide valve control is installed on nozzle
Cylinder end cap (3), the slide valve lever (5) and control piston (19) are placed in slide valve application cylinder (7), the control piston
(19) fixed one end for being set in slide valve lever (5), the slide valve lever (5) stretch out the other end and slide valve of slide valve application cylinder (7)
(16) it is rigidly connected, the slide valve lever (5) interior hub setting is equipped with adjustment axis (6), offers on the adjustment axis (6) outer ring
Helicla flute (61) is equipped with slide valve positioning pin (20) on the slide valve lever (5), and the slide valve positioning pin (20) is pierced by slide valve
Bar (5) and protrude into the helicla flute (61) on adjustment axis (6), when slide valve lever (5) are mobile, slide valve positioning pin (20) also it is mobile simultaneously
Adjustment axis (6) rotation is driven, the rotation angle of adjustment axis (6) reflects the position of slide valve (16).
2. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve control
It is equipped with displacement sensor (1) on cylinder end cap (3) processed, the displacement sensor (1) is by the rotation angle feed-back of adjustment axis (6)
To control system.
3. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve is fixed
Position pin (20) is located at slide valve lever (5) and controls on the part that piston (19) cooperate.
4. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the adjustment axis
(6) one end is by adjusting axle bearing (23) hub setting on the inner hole of slide valve application cylinder end cap (3).
5. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve control
Cylinder (7) processed is fixedly connected with air-breathing end cap (18) and sliding valve structure is made to be positioned at air-breathing end side.
6. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve control
Cylinder (7) processed protrudes into the cylinder end in piston chamber (17) and is located at screw rotor (15) at 1/4 rotor length of suction end.
7. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve knot
Structure further includes mutually matched limit spring (14) and spacer pin (11), and the limit spring (14) is installed on slide valve (16) court
In the spring eye opened up on the face of exhaust end, the spacer pin (11) is installed on exhausting end base (12), the limit
The effect of position spring (14) and spacer pin (11) is to prevent slide valve (16) from crossing displacement to exhaust end.
8. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 1, it is characterised in that the slide valve knot
Structure further includes slide valve guide rail (10), and the slide valve guide rail (10) and cylinder block (13) are rigidly connected and are placed horizontally at cylinder block
(13) in, the slide valve (16) contacts in displacement process with slide valve guide rail (10) and then relative level sliding.
9. a kind of sliding valve structure of oil-injecting screw rod compressor according to claim 8, it is characterised in that the slide valve
(16) drain pan is devised on baseplane, the effect of the drain pan is to reduce the phase of slide valve (16) and slide valve guide rail (10)
To the resistance that in sliding process, oil between the two is generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822139603.6U CN209195714U (en) | 2018-12-19 | 2018-12-19 | A kind of sliding valve structure of oil-injecting screw rod compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822139603.6U CN209195714U (en) | 2018-12-19 | 2018-12-19 | A kind of sliding valve structure of oil-injecting screw rod compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209195714U true CN209195714U (en) | 2019-08-02 |
Family
ID=67429794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822139603.6U Active CN209195714U (en) | 2018-12-19 | 2018-12-19 | A kind of sliding valve structure of oil-injecting screw rod compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209195714U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120282A (en) * | 2019-12-16 | 2020-05-08 | 珠海格力电器股份有限公司 | Loading and unloading control system based on electromagnetic positioning |
-
2018
- 2018-12-19 CN CN201822139603.6U patent/CN209195714U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120282A (en) * | 2019-12-16 | 2020-05-08 | 珠海格力电器股份有限公司 | Loading and unloading control system based on electromagnetic positioning |
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