CN109139593A - Guide's unloading valve - Google Patents
Guide's unloading valve Download PDFInfo
- Publication number
- CN109139593A CN109139593A CN201811231977.9A CN201811231977A CN109139593A CN 109139593 A CN109139593 A CN 109139593A CN 201811231977 A CN201811231977 A CN 201811231977A CN 109139593 A CN109139593 A CN 109139593A
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- section
- bushing
- valve
- blind hole
- hole
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 53
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The present invention proposes a kind of guide's unloading valve, comprising: valve pocket, retaining ring, off-load spool, bushing, steel ball, spring, unloading spring, swivel nut, adjusting rod, pilot valve, guide's spring, piston.Guide's unloading valve according to an embodiment of the present invention, volume compact, the processing is simple, and manufacturing cost is low, can carry out flexible switching.
Description
Technical field
The present invention relates to a kind of valves, relate in particular to a kind of guide's unloading valve.
Background technique
Guide's unloading valve is widely used in the hydraulic circuit with accumulator, for when the energy storage pressure for reaching setting
When, the flow of pump is switched in the bypass of no pressure；The other application of guide's unloading valve is exactly to be used for high low pressure pumping system,
Low-lift pump is switched in the bypass of no pressure in this application when pressure reaches the high-voltage value of setting.Existing elder generation
Unloading valve is led, such as: DA type guide's unloading valve of the hydraulic Co., Ltd's production of German Bosch's Rexroth, mostly board-like valve arrangement,
It is bulky, structure is complicated, at high cost, be not suitable for applied to Highgrade integration small-sized walking machine equipment in；In addition, existing
Guide's unloading valve, can rapidly by pump discharge when energy storage pressure reaches setting value when being applied to energy accumulator hydraulic circuit
It is switched to without in pressure bypass, the hydraulic shock as caused by switch speed is fast is big, not soft.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of volume compact, the processing is simple, manufacturing cost is low, Ke Yijin
Guide's unloading valve of the flexible switching of row.
Guide's unloading valve according to an embodiment of the present invention, comprising:
Valve pocket, the lower valve sleeve blind hole that the valve pocket has the upper valve sleeve blind hole of opening upwards and Open Side Down, the upper valve
Set blind hole includes the first upper valve sleeve blind hole section, the second upper valve sleeve blind hole section and the third upper valve sleeve that aperture is sequentially reduced from top to bottom
Blind hole section has the first hydraulic fluid port for being connected to the first upper valve sleeve blind hole section, the side wall of the valve pocket on the side wall of the valve pocket
Upper the 4th hydraulic fluid port with the connection third upper valve sleeve blind hole section, the lower valve sleeve blind hole includes that aperture successively increases from top to bottom
Big the first lower valve sleeve blind hole section and the second lower valve sleeve blind hole section has on the side wall of the valve pocket and is connected to second lower valve sleeve
The under shed of second hydraulic fluid port of blind hole section, the second lower valve sleeve blind hole section constitutes third hydraulic fluid port；
Retaining ring, the retaining ring is located on the inner wall of the second lower valve sleeve blind hole section and the retaining ring is between second oil
Between mouth and the third hydraulic fluid port；
Off-load spool, the off-load spool, which can slide up and down to, to be located in the second lower valve sleeve blind hole section and positioned at described
The upper surface of retaining ring, the off-load spool have the off-load spool blind hole of opening upwards, and the off-load spool also has described in connection
First damping hole of the lower end surface of off-load spool blind hole and the off-load spool；
Bushing, the bushing are located in the lower valve sleeve blind hole and positioned at the upper surface of described off-load spools, and the bushing is certainly
Upper and lower including bushing upper section and bushing lower section, the outer diameter of the bushing upper end is equal to the aperture of the second valve pocket blind hole section,
The outer diameter of the bushing lower section is equal to the aperture of the off-load spool blind hole and the bushing lower section extends downwardly into the unloading valve
In core blind hole, the bushing has a bushing through-hole of the bushing up and down, the bushing through-hole include aperture from top to bottom
The the first bushing through hole section and the second bushing through hole section being sequentially increased have on the upper surface of the bushing around first lining
The through-flow slot of bushing of through hole section is covered, the bushing is located at the inner wall of outer wall and the lower valve sleeve blind hole except the off-load spool
Between define the first control chamber, the second control chamber is defined between the bushing through-hole and the off-load spool blind hole, it is described
There is the second damping hole for being connected to first control chamber and the second bushing through hole section on bushing, there is connection institute on the bushing
State the through flow hole of the first control chamber Yu the first bushing through hole section, the through flow hole includes inner opening towards first bushing
The expanding hole section of through flow hole of the through flow hole main body hole section and outward opening towards the periphery wall of the bushing of through hole section；
Steel ball, the steel ball is located in the expanding hole section of the through flow hole radially displaceablely along the through flow hole, described
The outer diameter of steel ball is between the aperture of the through flow hole main body hole section and the aperture of the expanding hole section of the through flow hole；
Spring, the spring band are located on the bushing upper section and around the outward opening of the through flow hole with by the steel ball
It is limited in the expanding hole section of the through flow hole；
Unloading spring, the unloading spring are located in second control chamber, and the upper end of the unloading spring is against described
The lower end of bushing and the unloading spring is against the off-load spool, and the unloading spring often pushes the bushing upwards so that institute
State the upper surface of bushing against the lower valve sleeve blind hole bottom surface and the unloading spring often push downwards the off-load spool with
Make the lower end surface of the off-load spool against the retaining ring, at this point, the off-load spool closes second hydraulic fluid port；
Swivel nut, the swivel nut are located at the upper opening that the upper valve sleeve blind hole is closed on the valve pocket；
Adjusting rod, the adjusting rod is connected with the swivel nut screw thread and the lower end of the adjusting rod extends down into described
One upper valve sleeve blind hole section；
Pilot valve, the pilot valve can be located in the first upper valve sleeve blind hole section up or down and be located at described
Below adjusting rod, aperture and second upper valve sleeve of the outer diameter of the pilot valve between the first upper valve sleeve blind hole section
Between the aperture of blind hole section；
Guide's spring, guide's spring are located in the first upper valve sleeve blind hole section, and the upper end of guide's spring is supported
By the lower end of the adjusting rod and guide's spring against the pilot valve, guide's spring often pushes downwards the elder generation
Guide valve core is so that the upper opening of the second upper valve sleeve blind hole section is often closed in the lower end surface of the pilot valve；
Piston, the piston are located in the upper valve sleeve blind hole and are located at below the pilot valve, the piston packet
Include the piston main body section that can slide up and down to Pei He in the third valve pocket blind hole section, below the piston main body section
First piston undergauge section and above the piston main body section and upper end is adjacent to the second of the lower end surface of the pilot valve
Piston undergauge section defines between the inner peripheral surface of the third valve pocket blind hole section and the outer peripheral surface of the first piston undergauge section
Three control chambers, the third control chamber are connected with the 4th hydraulic fluid port, the inner peripheral surface of the second upper valve sleeve blind hole section and institute
It states and defines the 4th control chamber between the outer peripheral surface of second piston undergauge section, have on the valve pocket and be connected to the 4th control chamber
With the connection runner of the through-flow slot of the bushing.
Advantageously, guide's unloading valve further includes guide's valve seat, and guide's valve seat is detachably arranged in described
In two upper valve sleeve through hole sections, the pilot valve seat tool has the guide's valve seat passed through up and down for the second piston undergauge section
Through-hole, the aperture of guide's valve seat through-hole are greater than the outer diameter of the second piston undergauge section, and guide's spring often pushes away downwards
The pilot valve is moved so that the upper opening of guide's valve seat through-hole is often closed in the lower end surface of the pilot valve, at this point, institute
The spacing stated between the lower end surface of guide's valve seat and the upper surface of the piston main body section is greater than the second piston undergauge section
Spacing between upper surface and the lower end surface of the pilot valve.
Advantageously, guide's unloading valve further includes sealing ring, the sealing ring be located at guide's valve seat with it is described
Between second upper valve sleeve through hole section.
Advantageously, guide's valve seat is threadably located in the second upper valve sleeve through hole section.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of guide's unloading valve according to an embodiment of the invention；
Fig. 2 is the hydraulic schematic diagram of guide's unloading valve according to an embodiment of the invention；
Fig. 3 is the hydraulic schematic diagram of one application scenarios of guide's unloading valve according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail guide's unloading valve according to an embodiment of the present invention.
As shown in Figure 1 to Figure 3, guide's unloading valve according to an embodiment of the present invention, comprising: valve pocket 2, spiral shell adjusting rod 1, retaining ring
10, off-load spool 3, bushing 4, steel ball 4a, spring 4b, unloading spring 8b, swivel nut 9, pilot valve 7, guide spring 8a, piston 5.
Specifically, the lower valve sleeve blind hole that valve pocket 2 has the upper valve sleeve blind hole of opening upwards and Open Side Down, the upper valve
Set blind hole includes the first upper valve sleeve blind hole section, the second upper valve sleeve blind hole section and the third upper valve sleeve that aperture is sequentially reduced from top to bottom
Blind hole section has the first hydraulic fluid port T1 for being connected to the first upper valve sleeve blind hole section on the side wall of valve pocket 2, has on the side wall of valve pocket 2
There is the 4th hydraulic fluid port X for being connected to the third upper valve sleeve blind hole section, the lower valve sleeve blind hole includes that aperture is sequentially reduced from top to bottom
The first lower valve sleeve blind hole section and the second lower valve sleeve blind hole section, have on the side wall of valve pocket 2 and be connected to the second lower valve sleeve blind hole
The under shed of second hydraulic fluid port T2 of section, the second lower valve sleeve blind hole section constitute third hydraulic fluid port P.
Retaining ring 10 is located on the inner wall of the second lower valve sleeve blind hole section and retaining ring 10 is between the second hydraulic fluid port T2 and third oil
Between mouth P.
Off-load spool 3, which can slide up and down to, the upper surface of to be located in the second lower valve sleeve blind hole section and is located at retaining ring 10, is unloaded
Lotus spool 3 has the off-load spool blind hole of opening upwards, and off-load spool 3, which also has, is connected to the off-load spool blind hole and unloading valve
First damping hole 31 of the lower end surface of core 3.
Bushing 4 is located in the lower valve sleeve blind hole and positioned at the upper surface of off-load spool 3, and bushing 4 includes bushing from top to bottom
Upper section and bushing lower section, the outer diameter of the bushing upper end are equal to the aperture of the second valve pocket blind hole section, the bushing lower section
Outer diameter is equal to the aperture of the off-load spool blind hole and the bushing lower section extends downwardly into the off-load spool blind hole, bushing 4
Bushing through-hole with bushing 4 up and down, the bushing through-hole include that the first bushing for being sequentially increased from top to bottom of aperture is logical
Hole section and the second bushing through hole section have the through-flow slot of bushing around the first bushing through hole section on the upper surface of bushing 4
401, bushing 4, which is located between the outer wall except off-load spool 3 and the inner wall of the lower valve sleeve blind hole, defines the first control chamber 2a,
The second control chamber 2b is defined between the bushing through-hole and the off-load spool blind hole, and there is the first control of connection on bushing 4
The second damping hole 41 of chamber 2a and the second bushing through hole section have the first control chamber 2a of connection and described first on bushing 4
The through flow hole 42 of bushing through hole section, through flow hole 42 include through flow hole main body hole section of the inner opening towards the first bushing through hole section
With the expanding hole section of through flow hole of outward opening towards the periphery wall of bushing 4.
Steel ball 4a is located in the expanding hole section of the through flow hole radially displaceablely along through flow hole 42, and the outer diameter of steel ball 4a is situated between
Between the aperture of the through flow hole main body hole section and the aperture of the expanding hole section of the through flow hole.
Spring 4b hoop is located on the bushing upper section and described steel ball 4a to be limited to around the outward opening of through flow hole 42
In the expanding hole section of through flow hole.
Unloading spring 8b is located in the second control chamber 2b, and the upper end of unloading spring 8b is against bushing 4 and unloading spring 8b
Lower end often pushes bushing 4 so that the upper surface of bushing 4 is blind against the lower valve sleeve upwards against off-load spool 3, unloading spring 8b
The bottom surface in hole and unloading spring 8b often pushes off-load spool 3 downwards so that the lower end surface of off-load spool 3 is against retaining ring 10.At this point,
Off-load spool 3 closes the second hydraulic fluid port T2.As a result, when off-load spool 3 by external force overcome the active force of unloading spring 8b to
When upper mobile, off-load spool 3 can open the second hydraulic fluid port T2.
Swivel nut 9 is located at the upper opening that the upper valve sleeve blind hole is closed on valve pocket 2；
Adjusting rod 1 is connected with 9 screw thread of swivel nut and the lower end of adjusting rod 1 extends down into the first upper valve sleeve blind hole section.
Pilot valve 7 can be located in the first upper valve sleeve blind hole section up or down and be located at below adjusting rod 1, first
The outer diameter of guide valve core 7 is between the aperture of the first upper valve sleeve blind hole section and the aperture of the second upper valve sleeve blind hole section.
Guide's spring 8a is located in the first upper valve sleeve blind hole section, and the upper end of guide's spring 8a is against adjusting rod 10 and elder generation
The lower end of guided missile spring 8a against pilot valve 7, guide's spring 8a often push pilot valve 7 downwards so that pilot valve 7 lower end
Often close the upper opening of the second upper valve sleeve blind hole section in face.
Piston 5 is located in the upper valve sleeve blind hole and is located at below pilot valve 7, and piston 5 includes that can slide up and down to
Cooperate the piston main body section in the third valve pocket blind hole section, the first piston undergauge section below the piston main body section
And above the piston main body section and the second piston undergauge section of lower end surface of the upper end adjacent to pilot valve 7, described
Third control chamber 2c, third control are defined between the inner peripheral surface of three valve pocket blind hole sections and the outer peripheral surface of the first piston undergauge section
Chamber 2c processed is connected with the 4th hydraulic fluid port X.The inner peripheral surface of the second valve pocket blind hole section and the periphery of the second piston undergauge section
The 4th control chamber 2d is defined between face, and there is the first runner of connection the 4th control chamber 2d and the through-flow slot 401 of bushing on valve pocket 2
21, there is on valve pocket 2 second flow channel 22 of connection third control chamber 2c and the second lower valve sleeve through hole section.
Advantageously, guide's unloading valve further includes guide's valve seat 6, and guide's valve seat 6 is detachably arranged in described second
In upper valve sleeve through hole section (for example, guide's valve seat 6 is threadably located in the second upper valve sleeve through hole section), guide's valve seat 6 has
Up and down for guide's valve seat through-hole 61 that the second piston undergauge section passes through, the aperture of guide's valve seat through-hole 61 is greater than institute
The outer diameter of second piston undergauge section is stated, guide's spring 8a often pushes pilot valve 7 so that the lower end surface of pilot valve 7 is often sealed downwards
Close the upper opening of guide's valve seat through-hole 61.At this point, between the lower end surface of guide's valve seat 6 and the upper surface of the piston main body section
Spacing is greater than the spacing between the upper surface of the second piston undergauge section and the lower end surface of pilot valve 7.As a result, when piston 5
When being moved up by external force, it is ensured that piston 5 push up pilot valve 7 overcome the active force of guide's spring 8a to
Upper movement is to open the upper opening of guide's valve seat through-hole 61.Advantageously, guide's unloading valve further includes sealing ring 15, sealing
Circle 15 is located between guide's valve seat 6 and the second upper valve sleeve through hole section.
It following is a brief introduction of guide's unloading valve working principle according to an embodiment of the present invention:
As shown in figure 3, the application principle for guide's unloading valve according to the embodiment of the present invention in energy accumulator hydraulic circuit
Figure.Third hydraulic fluid port P is connected with the outlet of hydraulic pump 12, the 4th hydraulic fluid port X is connected with the import of accumulator 14, and check valve 11 is located at
Between the outlet of hydraulic pump 12 and accumulator 14, the first hydraulic fluid port T1, the second hydraulic fluid port T2 and fuel tank 13 are connected directly.
The distance of the first upper valve sleeve blind hole section is protruded by adjusting (i.e. dextrorotation or derotation adjusting rod 1) adjusting rod 1
It can change the pretightning force of guide's spring 8a, to set the cracking pressure of pilot valve 7.
Work as electric motor starting, when hydraulic pump 12 being driven to rotate, the oil liquid that hydraulic pump 12 exports enters accumulator through check valve 11
14, fliud flushing is carried out to accumulator 14, while the oil liquid that hydraulic pump 12 exports enters second through the first damping hole 31 by third hydraulic fluid port P
Control chamber 2b, then steel ball 4a is opened into the first control chamber 2a by through flow hole 42, while entering the 4th control through first runner 21
Chamber 2d is simultaneously applied in pilot valve 7, because pilot valve 7 is in close state, the oil liquid of the first control chamber 2a is without flowing, and
The pressure of one control chamber 2a, the second control chamber 2b and third hydraulic fluid port P are equal, under the active force of unloading spring 8b, off-load spool 3
It is in close state, third hydraulic fluid port P and the second hydraulic fluid port T2 cut-off are obstructed.
In accumulator namely when the 4th hydraulic fluid port X pressure reaches setting pressure, the pressure of the 4th hydraulic fluid port X enters third control
Chamber 2c is applied on piston 5, and piston 5 pushes pilot valve 7 that the active force of guide's spring 8a is overcome to move upwards upwards, is opened first
The upper opening of pilot valve block hole 61, the oil liquid of such second control chamber 2b is successively through first runner 21, the 4th control chamber 2d, guide
The first hydraulic fluid port T1 is flowed to after the upper opening of valve seat through-hole 61, due to the effect of the first damping hole 31, controls third hydraulic fluid port P and second
Pressure difference is produced between chamber 2b processed, the first control chamber 2a, and (i.e. pressure at third hydraulic fluid port P is greater than the pressure at the second control chamber 2b
And the first pressure at control chamber 2a), this pressure difference pushes off-load spool 3 that the active force of unloading spring 8b is overcome to move upwards,
So that off-load spool 3 opens the second hydraulic fluid port T2, and it is connected to the second hydraulic fluid port T2 with third hydraulic fluid port P, the oil liquid of third hydraulic fluid port P flows into
Second hydraulic fluid port T2 carries out off-load, makes hydraulic pump 14 compared with being operated under low consumpting power, due to the effect of the second damping hole 41,
When off-load spool 3 moves upwards, the oil liquid of the first control chamber 2a is to flow slowly into the second control chamber 2b through the second damping hole 41
(steel ball 4a closes through flow hole 42 under the pressure of the first control chamber 2a at this time), therefore off-load spool 3 is slow unlatching flexible,
Hydraulic shock is small.Meanwhile (i.e. pressure at the 4th hydraulic fluid port X is greater than because generating pressure difference between the 4th hydraulic fluid port A and third hydraulic fluid port P
Pressure at third hydraulic fluid port P), check valve 11 is closed, and third hydraulic fluid port P and the 4th hydraulic fluid port X truncation is obstructed, and accumulator enters pressure maintaining shape
State.
When pressure of the pressure of the 4th hydraulic fluid port X lower than guide's spring 8a setting, pilot valve 7 is moved downward to close elder generation
The upper opening of pilot valve block hole 61, so that the connection of partition the second control chamber 2b and the first hydraulic fluid port T1, close off-load spool 3 again
Close (oil liquid of the second control chamber 2b opens steel ball 4a through through flow hole 42 and rapidly enters the first control chamber 2a at this time), third hydraulic fluid port P
Oil liquid wash check valve 11 open and flow into the 4th hydraulic fluid port X and carry out quick ftercompction.
In addition, when check valve 11 is blocked due to impurity and third hydraulic fluid port P pressure is caused to rise, third hydraulic fluid port
The oil liquid of P is applied in pilot valve 7 through the upper opening of guide's valve seat through-hole 61, opens pilot valve 7, and off-load spool 3 is opened
Overflow can carry out safeguard protection effect to hydraulic pump 12.
The beneficial effect of guide's unloading valve according to an embodiment of the present invention is:
1. being designed by plug-in structure, unloading function, relief function are integrated together, volume compact, structure are simple
Rationally, manufacturing cost is low.
2. off-load spool flexibility is opened, hydraulic shock is small.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (4)
1. a kind of guide's unloading valve characterized by comprising
Valve pocket, the lower valve sleeve blind hole that the valve pocket has the upper valve sleeve blind hole of opening upwards and Open Side Down, the upper valve sleeve are blind
Hole includes the first upper valve sleeve blind hole section, the second upper valve sleeve blind hole section and the third upper valve sleeve blind hole that aperture is sequentially reduced from top to bottom
Section, there is the first hydraulic fluid port for being connected to the first upper valve sleeve blind hole section on the side wall of the valve pocket, have on the side wall of the valve pocket
There is the 4th hydraulic fluid port for being connected to the third upper valve sleeve blind hole section, the lower valve sleeve blind hole includes that aperture is sequentially reduced from top to bottom
First lower valve sleeve blind hole section and the second lower valve sleeve blind hole section have on the side wall of the valve pocket and are connected to the second lower valve sleeve blind hole
The under shed of second hydraulic fluid port of section, the second lower valve sleeve blind hole section constitutes third hydraulic fluid port；
Retaining ring, the retaining ring be located on the inner wall of the second lower valve sleeve blind hole section and the retaining ring between second hydraulic fluid port with
Between the third hydraulic fluid port；
Off-load spool, the off-load spool, which can slide up and down to, to be located in the second lower valve sleeve blind hole section and is located at the retaining ring
The upper surface of, the off-load spool has the off-load spool blind hole of opening upwards, and the off-load spool also has the connection off-load
First damping hole of the lower end surface of spool blind hole and the off-load spool；
Bushing, the bushing the upper surface of are located in the lower valve sleeve blind hole and are located at described off-load spool, the bushing from upper and
It down include bushing upper section and bushing lower section, the outer diameter of the bushing upper end is equal to the aperture of the second valve pocket blind hole section, described
The outer diameter of bushing lower section is equal to the aperture of the off-load spool blind hole and the bushing lower section, and to extend downwardly into the off-load spool blind
In hole, the bushing has a bushing through-hole of the bushing up and down, the bushing through-hole include aperture from top to bottom successively
The the first bushing through hole section and the second bushing through hole section increased has on the upper surface of the bushing logical around first bushing
The bushing of hole section is through-flow slot, the bushing are located between the outer wall except the off-load spool and the inner wall of the lower valve sleeve blind hole
The first control chamber is defined, the second control chamber, the bushing are defined between the bushing through-hole and the off-load spool blind hole
It is upper with the second damping hole for being connected to first control chamber and the second bushing through hole section, there is connection described the on the bushing
The through flow hole of one control chamber and the first bushing through hole section, the through flow hole include inner opening towards the first bushing through-hole
The expanding hole section of through flow hole of the through flow hole main body hole section and outward opening towards the periphery wall of the bushing of section；
Steel ball, the steel ball are located in the expanding hole section of the through flow hole radially displaceablely along the through flow hole, the steel ball
Outer diameter between the aperture of the through flow hole main body hole section and the aperture of the expanding hole section of the through flow hole；
Spring, the spring band are located at the outward opening on the bushing upper section and around the through flow hole to limit the steel ball
In the expanding hole section of the through flow hole；
Unloading spring, the unloading spring are located in second control chamber, and the upper end of the unloading spring is against the bushing
And the lower end of the unloading spring, against the off-load spool, the unloading spring often pushes the bushing upwards so that the lining
The upper surface of set against the lower valve sleeve blind hole bottom surface and the unloading spring often pushes the off-load spool downwards so that institute
The lower end surface of off-load spool is stated against the retaining ring, at this point, the off-load spool closes second hydraulic fluid port；
Swivel nut, the swivel nut are located at the upper opening that the upper valve sleeve blind hole is closed on the valve pocket；
Adjusting rod, the adjusting rod is connected with the swivel nut screw thread and the lower end of the adjusting rod extends down on described first
Valve pocket blind hole section；
Pilot valve, the pilot valve can be located in the first upper valve sleeve blind hole section up or down and be located at the adjusting
Below bar, aperture and the second upper valve sleeve blind hole of the outer diameter of the pilot valve between the first upper valve sleeve blind hole section
Between the aperture of section；
Guide's spring, guide's spring are located in the first upper valve sleeve blind hole section, and the upper end of guide's spring is against institute
The lower end of adjusting rod and guide's spring is stated against the pilot valve, guide's spring often pushes downwards the pilot valve
Core is so that the upper opening of the second upper valve sleeve blind hole section is often closed in the lower end surface of the pilot valve；
Piston, the piston are located in the upper valve sleeve blind hole and are located at below the pilot valve, and the piston includes can
Slide up and down to the piston main body section cooperated in the third valve pocket blind hole section, first below the piston main body section
Piston undergauge section and above the piston main body section and the second piston of lower end surface of the upper end adjacent to the pilot valve
Undergauge section defines third control between the inner peripheral surface of the third valve pocket blind hole section and the outer peripheral surface of the first piston undergauge section
Chamber processed, the third control chamber are connected with the 4th hydraulic fluid port, the inner peripheral surface of the second upper valve sleeve blind hole section and described the
The 4th control chamber is defined between the outer peripheral surface of two piston undergauge sections, is had on the valve pocket and is connected to the 4th control chamber and institute
State the connection runner of the through-flow slot of bushing.
2. guide's unloading valve according to claim 1, which is characterized in that further include guide's valve seat, guide's valve seat can
It is releasably located in the second upper valve sleeve through hole section, the pilot valve seat tool has up and down for the second piston undergauge
Guide's valve seat through-hole that section passes through, the aperture of guide's valve seat through-hole is greater than the outer diameter of the second piston undergauge section, described
Guide's spring often pushes the pilot valve downwards so that guide's valve seat through-hole is often closed in the lower end surface of the pilot valve
Upper opening, at this point, spacing between the lower end surface of guide's valve seat and the upper surface of the piston main body section be greater than it is described
Spacing between the upper surface of second piston undergauge section and the lower end surface of the pilot valve.
3. guide's unloading valve according to claim 2, which is characterized in that further include sealing ring, the sealing ring is located at institute
It states between guide's valve seat and the second upper valve sleeve through hole section.
4. guide's unloading valve according to claim 2 or 3, which is characterized in that guide's valve seat is threadably located at described
In second upper valve sleeve through hole section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231977.9A CN109139593B (en) | 2018-10-22 | 2018-10-22 | Pilot unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231977.9A CN109139593B (en) | 2018-10-22 | 2018-10-22 | Pilot unloading valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109139593A true CN109139593A (en) | 2019-01-04 |
| CN109139593B CN109139593B (en) | 2020-05-26 |
Family
ID=64809278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811231977.9A Active CN109139593B (en) | 2018-10-22 | 2018-10-22 | Pilot unloading valve |
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| Country | Link |
|---|---|
| CN (1) | CN109139593B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537136A (en) * | 2020-06-05 | 2020-08-14 | 安徽威特仪表科技有限公司 | Air pressure detecting meter |
| CN113833704A (en) * | 2020-06-24 | 2021-12-24 | 左天乔 | Pilot-operated type pressure release valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160230780A1 (en) * | 2013-09-21 | 2016-08-11 | HYDAC Engineering AG | Valve device and hydraulic system |
| CN106224313A (en) * | 2016-08-22 | 2016-12-14 | 江苏二马液压元件有限公司 | A kind of pioneer pump overflow valve |
| KR20170028009A (en) * | 2015-09-03 | 2017-03-13 | 현대중공업 주식회사 | Hydraulic Valve and Hydraulic Apparatus of Construction Equipment having same |
| CN107940051A (en) * | 2017-11-15 | 2018-04-20 | 宁波文泽机电技术开发有限公司 | A kind of precursor overflow valve of quick response |
-
2018
- 2018-10-22 CN CN201811231977.9A patent/CN109139593B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160230780A1 (en) * | 2013-09-21 | 2016-08-11 | HYDAC Engineering AG | Valve device and hydraulic system |
| KR20170028009A (en) * | 2015-09-03 | 2017-03-13 | 현대중공업 주식회사 | Hydraulic Valve and Hydraulic Apparatus of Construction Equipment having same |
| CN106224313A (en) * | 2016-08-22 | 2016-12-14 | 江苏二马液压元件有限公司 | A kind of pioneer pump overflow valve |
| CN107940051A (en) * | 2017-11-15 | 2018-04-20 | 宁波文泽机电技术开发有限公司 | A kind of precursor overflow valve of quick response |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537136A (en) * | 2020-06-05 | 2020-08-14 | 安徽威特仪表科技有限公司 | Air pressure detecting meter |
| CN113833704A (en) * | 2020-06-24 | 2021-12-24 | 左天乔 | Pilot-operated type pressure release valve |
| CN113833704B (en) * | 2020-06-24 | 2024-02-06 | 左天乔 | Pilot-operated relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109139593B (en) | 2020-05-26 |
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Effective date of registration: 20200422 Address after: 234000 room 013, 11th floor, Kechuang building, Suma Park, Suzhou City, Anhui Province Applicant after: Anhui nuole Intellectual Property Service Co., Ltd Address before: 252300 No. 160, Ma Miao village, Shou Zhang Zhen, Yanggu County, Liaocheng, Shandong Applicant before: Chen Shaotong |
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Effective date of registration: 20200728 Address after: No.485 Xinrun Road, Xinqiao Town, Songjiang District, Shanghai 201600 Patentee after: Shanghai PRINS Machinery Manufacturing Co., Ltd Address before: 234000 room 013, 11th floor, Kechuang building, Suma Park, Suzhou City, Anhui Province Patentee before: Anhui nuole Intellectual Property Service Co.,Ltd. |
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