CN106763899B - Pressure valve and hydraulic system with it - Google Patents
Pressure valve and hydraulic system with it Download PDFInfo
- Publication number
- CN106763899B CN106763899B CN201611078387.8A CN201611078387A CN106763899B CN 106763899 B CN106763899 B CN 106763899B CN 201611078387 A CN201611078387 A CN 201611078387A CN 106763899 B CN106763899 B CN 106763899B
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- Prior art keywords
- accommodating chamber
- spool
- flow channels
- pressure
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding valves
-
- 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
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- 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
- F15B13/029—Counterbalance valves
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
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- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
Abstract
The present invention provides a kind of pressure valve and with its hydraulic system.Wherein, pressure valve includes valve body, has elastic component accommodating chamber, the first and second accommodating chambers, is provided with the first, second, and third flow channels in the cavity wall of the first accommodating chamber；Elastic component is arranged in elastic component accommodating chamber；Spool is movably disposed in spool accommodating chamber and supports with elastic component, spool has the first, second, and third position, when spool is located at first position, spool blocks the first flow channels, so that the first accommodating chamber is not connected to mutually with the second accommodating chamber, second flow channels are connected to the second accommodating chamber, and when spool is located at the second position, spool blocks first and second flow channels.When spool is located at the third place, first and second accommodating chamber is connected to by third flow channels, and the second flow channels are blocked by spool.The problem of the control hardly possible of the system oil pressure height in the prior art in the case where no extraneous power supply can be efficiently solved by applying the technical scheme of the present invention.
Description
Technical field
The present invention relates to Hydraulic Fields, in particular to a kind of pressure valve and with its hydraulic system.
Background technique
Currently, generalling use pump/solenoid valve combination in the pressure-retaining system of hydraulic system to realize system oil pressure height
The control precision of control, above structure is high, and control effect is good, but it is that solenoid valve is supplied that above structure, which needs electric system,
Electricity.When hydraulic system will apply the environment in field or exclusion area (under the operating condition of i.e. no any extraneous power supply),
The cutting of oil pressure can not be just controlled using solenoid valve and is turned on.
Summary of the invention
The main purpose of the present invention is to provide a kind of pressure valve and with its hydraulic system, to solve in the prior art
The difficult problem of the control of system oil pressure height in the case where no extraneous power supply.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of pressure valve, comprising: valve body has
Mutual disconnected elastic component accommodating chamber and spool accommodating chamber, spool accommodating chamber include the first accommodating chamber and hold positioned at first
Receive chamber close elastic component accommodating chamber the second accommodating chamber, fluid enters in valve body from the import of the first accommodating chamber, the of valve body
The first flow channels, the second flow channels and third flow channels, the second flow channels are provided in the cavity wall of one accommodating chamber
Positioned at the side of the close elastic component accommodating chamber of the first flow channels, third flow channels are connected to the first flow channels and hold with second
Receive chamber, the second flow channels are not connected to mutually with the first flow channels and third flow channels；Elastic component, setting are held in elastic component
It receives intracavitary；Spool is movably disposed in spool accommodating chamber, and the first end of spool is located in the first accommodating chamber, and the of spool
Two ends are protruded into elastic component accommodating chamber and are supported with elastic component, and spool has first position, the second position and the third place, work as valve
When core is located at first position, spool blocks the first flow channels, so that the first accommodating chamber is not connected to mutually with the second accommodating chamber, second
Flow channels are connected to the second accommodating chamber, and when spool is located at the second position, spool blocks the first flow channels and the second overcurrent
Channel, when spool is located at the third place, the first accommodating chamber is connected to the second accommodating chamber by third flow channels, the second overcurrent
Channel is blocked by spool, and a part of fluid is flowed out from the first flow channels, remaining fluid flows into the second accommodating chamber, wherein works as stream
When the pressure of body is gradually increased, spool is gradually moved to the second position from first position, makes a reservation for when the pressure of fluid reaches first
When pressure, spool generates phase step type displacement, and spool is moved quickly to the third place from the second position, when the pressure of fluid gradually subtracts
Hour, spool is gradually moved to the second position from the third place, and when the pressure of fluid reaches the second predetermined pressure, spool is generated
Phase step type displacement, spool are moved quickly to first position from the second position.
Further, spool includes from spool accommodating chamber to the first column set gradually on the direction of elastic component accommodating chamber
Section, the second shell of column and third shell of column, the first shell of column are movably disposed in the first accommodating chamber, the second shell of column and third column
Section is movably disposed in the second accommodating chamber, the sectional area S1 of the first shell of column, the sectional area S2 of the second shell of column and third shell of column
Sectional area S3 between relationship be S1 < S3 < S2.
Further, the first shell of column includes cooperation section and cooperation section is arranged between one end of elastic component accommodating chamber
Gap section, cooperation section are adapted with the cavity wall of the first accommodating chamber, with gap between gap section and the cavity wall of the first accommodating chamber, second
Flow channels are connected to by gap with the second accommodating chamber.
Further, the first shell of column be cylindrical section, cooperate section diameter d1 and gap section diameter d2 between relationship be
D1 > d2.
Further, third shell of column is cylindrical section, cooperates the relationship between the diameter d1 of section and the diameter D3 of third shell of column
It is d1/D3 between 0.85-0.99.
Further, the first flow channels are the first flowing hole, and the second flow channels are the second flowing hole, cooperate the length of section
Degree be equal to the first flowing hole separate elastic component one end between one end of the close elastic component of the second flowing hole along valve body
Distance on axis direction.
Further, third flow channels are third flowing hole, and third flowing hole extends along the axis direction of valve body, third
One end of flowing hole is connected to the first flowing hole, and the other end of third flowing hole is connected to the second accommodating chamber.
Further, pressure valve further includes valve pocket, and valve is set between elastic component accommodating chamber and spool accommodating chamber, valve
It puts on avoid holes, the second end of spool is pierced by out of avoid holes, and is supported with elastic component.
It further, is the oil film seal of plunger pattern between spool and valve pocket.
Further, valve body includes the first valve body and the second valve body interconnected, and the inner cavity of the first valve body forms elasticity
The inner cavity of part accommodating chamber, the second valve body forms spool accommodating chamber, and valve pocket is folded between the first valve body and the second valve body, the second valve
Oil leak hole is provided on body, the first end of oil leak hole is connected to the second flow channels, and the second end of oil leak hole is located at the second valve body
With the junction of valve pocket, to prevent fluid from entering in elastic component accommodating chamber.
Further, elastic component includes spring and guide part, and the one end of spring close to spool is arranged in guide part, elasticity
Part accommodating chamber includes directed cavity and spring accommodating chamber, and spring is arranged in spring accommodating chamber, and guide part is movably disposed at
It is adapted in directed cavity and with the cavity wall of directed cavity.
Further, valve body and spool are the oil film seal of plunger pattern.
Further, spool passes through Surface hardening treatment.
According to another aspect of the present invention, a kind of hydraulic system is provided, comprising: air pump converter has air pump entrance
Gentle pump discharge, air pump entrance are connected to gas source；Switch valve is arranged between air pump converter and gas source, is arranged on switch valve
There is fluid inlet, switch valve has open state and closed state, and when fluid inlet has fluid to enter, switch valve, which is in, is closed
State, switch valve cuts off the channel between air pump entrance and gas source, and when fluid inlet does not have fluid to enter, switch valve is in and opens
When opening state, air pump entrance is connected to gas source；Pressure valve, pressure valve are above-mentioned pressure valve, the first accommodating chamber of pressure valve
Import and air pump outlet connect, and the first flow channels of pressure valve and the fluid inlet of switch valve connect, the second mistake of pressure valve
Circulation road and the fuel tank of hydraulic system connect.
It applies the technical scheme of the present invention, when the pressure of fluid for entering the first accommodating chamber is gradually increased, spool is from the
One position is gradually moved to the second position, and when the pressure of fluid reaches the first predetermined pressure, the first flow channels are held with first
Chamber of receiving connection, spool are moved quickly to the third place from the second position, and spool generates phase step type displacement.At this moment the pressure meeting of fluid
It keeps balancing with the power of elastic component.Since the second flow channels are not connected to the first flow channels, while the second flow channels quilt
Spool blocks, therefore spool is able to maintain under the pressure of fluid on the position of setting.And when the fluid into the first accommodating chamber
Pressure when being gradually reduced, spool is gradually moved to the second position from the third place.When the pressure of fluid reaches the second pre- level pressure
When power, the second flow channels are opened, and the fluid in the second accommodating chamber is flowed out from the second flow channels, so that in the second accommodating chamber
Pressure dump falls, and spool is moved quickly to the due to generating phase step type displacement under the action of elastic component restoring force, by the second position
One position.Therefore above structure can in guarantee system the pressure of liquid be maintained at the first predetermined pressure and the second predetermined pressure it
Between.And phase step type displacement, above-mentioned knot can be generated from the second position to the third place or when first position due to spool
Control precision when structure controls high-low pressure is higher.In addition, in said structure, what the power of spool leaned on is the intracorporal liquid of valve
Body, therefore power is provided without external power supply.(i.e. when hydraulic system will apply the environment in field or exclusion area
Under the operating condition for not having any extraneous power supply), the cutting and conducting of fluid pressure can be still controlled using above-mentioned pressure valve, solved
It has determined the difficult problem of control of the system oil pressure height in the prior art in the case where no extraneous power supply.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
The spool that Fig. 1 shows the embodiment of pressure valve according to the present invention is in vertical profile structural representation when first position
Figure；
Fig. 2 shows spools when the spool of the pressure valve of Fig. 1 is mobile to the third place from the first position to be in
Vertical profile structural schematic diagram when the second position；
The spool that Fig. 3 shows the pressure valve of Fig. 1 is in vertical profile structural schematic diagram when the third place；
The spool that Fig. 4 shows the pressure valve of Fig. 1 is in from the third place to spool when the movement of the first position
Vertical profile structural schematic diagram when the second position；And
Fig. 5 shows the system diagram of hydraulic system according to the present invention.
Wherein, the above drawings include the following reference numerals:
10, valve body；10a, the first valve body；10b, the second valve body；11, elastic component accommodating chamber；111, directed cavity；112, spring
Accommodating chamber；12, spool accommodating chamber；121, the first accommodating chamber；121a, import；1211, the first flow channels；1212, the second overcurrent
Channel；1213, third flow channels；122, the second accommodating chamber；13, oil leak hole；20, elastic component；21, spring；22, guide part；
30, spool；31, the first shell of column；311, cooperate section；312, gap section；32, the second shell of column；33, third shell of column；40, valve pocket；50,
Air pump converter；51, air pump entrance；52, air pump exports；60, gas source；70, switch valve；71, fluid inlet；80, fuel tank；90,
Screw；100, sealing ring.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 4, the pressure valve of the present embodiment includes: valve body 10, elastic component 20 and spool 30.Wherein, valve
Body 10 has mutual disconnected elastic component accommodating chamber 11 and spool accommodating chamber 12, and spool accommodating chamber 12 includes the first accommodating chamber
121 and the close elastic component accommodating chamber 11 positioned at the first accommodating chamber 121 the second accommodating chamber 122, fluid is from the first accommodating chamber
121 import 121a enters in valve body 10, is provided with the first flow channels in the cavity wall of the first accommodating chamber 121 of valve body 10
1211, the second flow channels 1212 and third flow channels 1213, the second flow channels 1212 are located at the first flow channels
The side of 1211 close elastic component accommodating chamber 11, first flow channels of the connection of third flow channels 1,213 1211 and second accommodate
Chamber 122, the second flow channels 1212 are not connected to mutually with the first flow channels 1211 and third flow channels 1213；Elastic component 20
It is arranged in elastic component accommodating chamber 11；Spool 30 is movably disposed in spool accommodating chamber 12, and the first end of spool 30 is located at
In first accommodating chamber 121, the second end of spool 30 is protruded into elastic component accommodating chamber 11 and is supported with elastic component 20, and spool 30 has
First position, the second position and the third place, when spool 30 is located at first position, spool 30 blocks the first flow channels
1211, so that the first accommodating chamber 121 is not connected to mutually with the second accommodating chamber 122, the second flow channels 1212 and the second accommodating chamber 122
Connection.When spool 30 is located at the second position, spool 30 blocks the first flow channels 1211 and the second flow channels 1212.Work as valve
When core 30 is located at the third place, the first accommodating chamber 121 is connected to the second accommodating chamber 122 by third flow channels 1213, and second
Flow channels 1212 are blocked by spool 30, and a part of fluid is flowed out from the first flow channels 1211, remaining fluid, which flows into second, to be held
Receive chamber 122.When the pressure of fluid is gradually increased, spool 30 is gradually moved to the second position from first position, when the pressure of fluid
When power reaches the first predetermined pressure, spool 30 generates phase step type displacement, and spool 30 is moved quickly to the third place from the second position,
When the pressure of fluid is gradually reduced, spool 30 is gradually moved to the second position from the third place, when the pressure of fluid reaches
When two predetermined pressures, spool 30 generates phase step type displacement, and spool 30 is moved quickly to first position from the second position.
Using the technical solution of the present embodiment, when the pressure of the fluid into the first accommodating chamber 121 is gradually increased, spool
30 are gradually moved to the second position from first position, when the pressure of fluid reaches the first predetermined pressure, the first flow channels
1211 are connected to the first accommodating chamber 121, and spool 30 is moved quickly to the third place from the second position, and spool 30 generates phase step type position
It moves.At this moment the pressure of fluid can keep balancing with the power of elastic component 20.It is not crossed and is circulated with first due to the second flow channels 1212
Road 1211 is connected to, while the second flow channels 1212 are blocked by spool 30, therefore spool 30 is able to maintain under the pressure of fluid
On the position of setting.And when the pressure of fluid for entering the first accommodating chamber 121 is gradually reduced, spool 30 from the third place gradually
It is moved to the second position.When the pressure of fluid reaches the second predetermined pressure, the second flow channels 1212 are opened, the second accommodating chamber
Fluid in 122 is flowed out from the second flow channels 1212 so that the pressure in the second accommodating chamber 122 is let out and is removed, spool 30 due to
Phase step type displacement is generated under the action of the restoring force of elastic component 20, and first position is moved quickly to by the second position.Therefore above-mentioned
Structure the pressure of liquid can be maintained between the first predetermined pressure and the second predetermined pressure in guarantee system.And due to spool
30 can generate phase step type displacement from the second position to the third place or when first position, therefore above structure enables pressure valve
It is enough in the state of pressure keeping of No leakage, so that control precision when high-low pressure controls is higher.In addition, in said structure, spool
What 30 power leaned on is the intracorporal liquid of valve, therefore provides power without external power supply.When hydraulic system will be applied in field
Or exclusion area environment when (under the operating condition of no any extraneous power supply), can still be controlled using above-mentioned pressure valve
The cutting and conducting of fluid pressure processed solve the system oil pressure height in the prior art in the case where no extraneous power supply
Control difficult problem.
As shown in Figures 1 to 4, in the present embodiment, spool 30 includes from spool accommodating chamber 12 to elastic component accommodating chamber 11
Direction on the first shell of column 31, the second shell of column 32 and the third shell of column 33 that set gradually, the first shell of column 31 is movably disposed
In the first accommodating chamber 121, the second shell of column 32 and third shell of column 33 are movably disposed in the second accommodating chamber 122, and first
The sectional area S of shell of column 311, the second shell of column 32 sectional area S2With the sectional area S of third shell of column 333Between relationship be S1< S3<
S2.Specifically, when the pressure of the fluid into the first accommodating chamber 121 is gradually increased, spool 30 is gradually moved from first position
To the second position, when the pressure of fluid reaches the first predetermined pressure, the first flow channels 1211 and the first accommodating chamber 121 connect
Logical, a part of fluid is entered in third flow channels 1213 by the first flow channels 1211, subsequently into the second accommodating chamber
122.Since the second shell of column 32 connects the first shell of column 31 and third shell of column 33, and the sectional area S of the first shell of column 311, the second shell of column
32 sectional area S2With the sectional area S of third shell of column 333Between relationship be S1< S3< S2, therefore the sectional area of the second shell of column 32
S2With the sectional area S of the first shell of column 311Difference S2-1Greater than the sectional area S of the second shell of column 322With the sectional area of third shell of column 33
S3Difference S2-3.If the pressure in the second accommodating chamber is pressure P at this time, then the second shell of column 32 is close to the end of the first shell of column 31
Power P*S suffered by face2-1Just it is greater than the second shell of column 32 power P*S suffered by the end face of third shell of column 332-3.Therefore the
Two shell of columns 32 power moment suffered by the end face of the first shell of column 31 is just greater than the second shell of column 32 close to third shell of column 33
Power suffered by end face, spool 30 will generate phase step type displacement.Above structure is simple, and spool 30 is enabled to generate phase step type
Movement.Preferably, in the present embodiment, the first shell of column 31, the second shell of column 32 and third shell of column 33 are coaxial shell of column.
As shown in Figures 1 to 4, in the present embodiment, the first shell of column 31 includes cooperation section 311 and setting in cooperation section
311 are adapted close to the gap section 312 of one end of elastic component accommodating chamber 11, cooperation section 311 with the cavity wall of the first accommodating chamber 121,
There is gap, the second flow channels 1212 are accommodated by gap with second between gap section 312 and the cavity wall of the first accommodating chamber 121
Chamber 122 is connected to.Specifically, when spool 30 is located at first position, the fluid with pressure in the second accommodating chamber 122 can pass through
Gap is flowed out from the second flow channels 1212, to achieve the purpose that pressure release.Above structure is simple, it is easy to accomplish.Certainly, ability
Field technique personnel should be known that the structure for being connected to the second flow channels 1212 with the second accommodating chamber 122 is without being limited thereto, can also be with
It is that flowing hole is set on the predetermined position of spool 30, when to be moved to the second flow channels 1212 corresponding with flowing hole for spool 30
When position, the fluid in the second accommodating chamber 122 can be flowed out by the flowing hole communicated therewith from the second flow channels 1212, with
Achieve the purpose that pressure release.
As shown in Figures 1 to 4, in the present embodiment, the first shell of column 31 is cylindrical section, cooperates the diameter d of section 3111With
The diameter d of gap section 3122Between relationship be d1> d2.Above structure is simple, easy to process and manufacture.
As shown in Figures 1 to 4, in the present embodiment, the second shell of column 32 and third shell of column 33 are cylindrical section, the second shell of column
32 diameter D2Greater than the diameter D of third shell of column 333, cooperate the diameter d of section 3111With the diameter D of third shell of column 333Between pass
System is d1/D3Between 0.85-0.99.The pressure difference control of high pressure or extra high voltage system may be implemented in above structure.It needs to illustrate
It is that in the present embodiment, pressure valve carries out control pressure using itself pilot pressure, by the difference in areas (d of itself1/D3?
Between 0.85-0.99) and elastic component be combined into height pressure control valve.And the pressure difference of high-low pressure depend on spool 30 diameter ratio and
The combination of elastic component 20.The power (N/mm) of rigidity and per stroke that elastic component 20 designs is related.
Preferably, as shown in Figures 1 to 4, in the present embodiment, pressure valve further includes screw 90, and screw 90 is arranged in bullet
The property one end of part accommodating chamber far from spool accommodating chamber.It before actual use, can be according to pressure difference come adjustment spring.Screw is past
In twist, spring compresses inwards, and the pressure of setting is high.Screw is twisted outward, and amount of spring compression reduces, therefore precompression also reduces.
As shown in Figures 1 to 4, in the present embodiment, the first flow channels 1211 are the first flowing hole, the second flow channels
1212 be the second flowing hole, and the length of cooperation section 311 is equal to one end of the separate elastic component 20 of the first flowing hole to the second overcurrent
The distance on 10 axis direction of valve body between one end of the close elastic component 20 in hole.Specifically, when from hydraulic system
When fluid pressure at Fluid pressure, that is, import 121a increases, spool 30 is understood with the raising of fluid pressure and gradually
It is displaced to the direction of elastic component accommodating chamber.When spool 30 is moved to the second position (as shown in Figure 2), i.e., when cooperation section 311
End face (left side) far from elastic component 20 is moved to one end (left end) of the separate elastic component 20 in the aperture of the first flowing hole, together
The end face (right side) of the close elastic component 20 of Shi Peihe section 311 is moved to the close elastic component 20 in the aperture of the second flowing hole
When one end (right end), the liquid of second the 122 to the second flowing hole of accommodating chamber will be blocked at once, so that the second accommodating chamber 122
Inside no longer pressure release.The pressure moment of cavity in this way in the second accommodating chamber 122 of valve body can keep balancing.Therefore the second position
It can be known as critical localisation.Likewise, the fluid pressure at the fluid pressure from hydraulic system, that is, import 121a
When reduction, spool 30 with the reduction of fluid pressure and gradually can be displaced to the direction far from elastic component accommodating chamber 11.Work as valve
When core 30 is moved to the second position (as shown in Figure 4), i.e. the end face (left side) of the separate elastic component 20 of cooperation section 311 is moved to
One end (left end) of the separate elastic component in the aperture of the first flowing hole, while cooperating the end face of the close elastic component 20 of section 311 (right
End face) be moved to the second flowing hole aperture close elastic component 20 one end (right end) when, the first overcurrent will be blocked at once
Pressure fluid of the hole to the second accommodating chamber 122.The pressure moment of cavity in this way in the second accommodating chamber 122 of valve body can keep flat
Weighing apparatus.Above structure is simple, it is easy to accomplish.Certainly, it will be appreciated by those skilled in the art that the separate elastic component 20 of the first flowing hole
One end can also be omited to the distance on 10 axis direction of valve body between one end of the close elastic component 20 of the second flowing hole
Greater than the length of cooperation section 311.
As shown in Figures 1 to 4, in the present embodiment, third flow channels 1213 are third flowing hole, third flowing hole edge
The axis direction of valve body 10 extends, and one end of third flowing hole is connected to the first flowing hole, the other end of third flowing hole and the
The connection of two accommodating chambers 122.Specifically, when spool 30 is located at the third place, the liquid in the first accommodating chamber 121 enters the first mistake
Discharge orifice, a part of liquid into the first flowing hole are flowed out from the first flowing hole, remaining liquid is flowed by third flowing hole
Second accommodating chamber 122.Above structure is simple, easy to process.
As shown in Figures 1 to 4, in the present embodiment, pressure valve further includes valve pocket 40, and the setting of valve pocket 40 is accommodated in elastic component
Between chamber 11 and spool accommodating chamber 12, there are avoid holes on valve pocket 40, the second end of spool 30 is pierced by out of avoid holes, and with
Elastic component 20 is supported.Since spool is movably disposed in valve pocket 40 and the first accommodating chamber 121, it is therefore desirable to guarantee valve pocket 40
It is overlapped with the axis of the first accommodating chamber 121.To achieve the goals above, in the present embodiment, the diameter of valve pocket 40 is less than second
There is gap, valve pocket 40 can be between the diameter of the cavity wall of accommodating chamber 122, i.e. valve pocket 40 and the cavity wall of the second accommodating chamber 122
It floats in second accommodating chamber 122.When installing pressure valve, first spool 30 is protruded into the first accommodating chamber 121, then by 40 sets of valve pocket
It is located on spool 30, since the cavity wall of valve pocket 40 and the second accommodating chamber 122 has floating space, valve pocket 40 be can be realized certainly
Dynamic centering, avoids the phenomenon that assembling decentraction generation.
It as shown in Figures 1 to 4, in the present embodiment, is the oil film seal of plunger pattern between spool 30 and valve pocket 40.By
In by the way of oil film rigid seal, therefore it is vulnerable to solve the problems, such as that 30 soft seal of spool is used for a long time.Meanwhile oil
Film sealing itself has the function of lubrication, so service life is very long, is used for a long time without maintenance.In addition, oil film seal can also
Enough realize the function of No leakage between spool 30 and valve pocket 40.
As shown in Figures 1 to 4, in the present embodiment, valve body 10 includes the first valve body 10a interconnected and the second valve body
The inner cavity of 10b, the first valve body 10a form elastic component accommodating chamber 11, and the inner cavity of the second valve body 10b forms spool accommodating chamber 12, valve
Set 40 is folded between the first valve body 10a and the second valve body 10b, and oil leak hole 13 is provided on the second valve body 10b, oil leak hole 13
First end is connected to the second flow channels 1212, and the second end of oil leak hole 13 is located at the junction of the second valve body 10b and valve pocket 40,
To prevent fluid from entering in elastic component accommodating chamber 11.Above structure to work as has fluid light between the second valve body 10b and valve pocket 40
When Micro blazed-grating, fluid can be flowed out from oil leak hole, and fluid is avoided to enter in elastic component accommodating chamber 11, and then elastic component 20 is avoided to lose
The case where effect, occurs.It preferably, is to be threadedly coupled between the first valve body 10a and the second valve body 10b.
Preferably, as shown in Figures 1 to 4, in the present embodiment, pressure valve further includes O-ring seal 100, sealing ring 100
It is folded between the second valve body 10b and valve pocket 40, to seal up the gap between the second valve body 10b and valve pocket 40.It is further excellent
Selection of land, the second end of oil leak hole 13 are located at the junction of the second valve body 10b and sealing ring 100.Above structure makes when the second valve
When having fluid slightly to leak between body 10b and sealing ring 100, fluid can be flowed out from oil leak hole, so that fluid be avoided to enter bullet
In property part accommodating chamber 11.In addition, above structure can also above-mentioned the case where avoiding External leakage generation.
As shown in Figures 1 to 4, in the present embodiment, elastic component 20 includes spring 21 and guide part 22, and guide part 22 is set
It sets in spring 21 close to one end of spool 30, elastic component accommodating chamber 11 includes directed cavity 111 and spring accommodating chamber 112, spring
21 are arranged in spring accommodating chamber 112, and guide part 22 is movably disposed in directed cavity 111 and the cavity wall with directed cavity 111
Adaptation.Above structure enables guide part 22 to move along predetermined direction.In addition, in the present embodiment, elastic component 20 is spring,
Pressure valve uses spring set pressure.It should be noted that spring is according to pressure difference (the first predetermined pressure and the second pre- level pressure
The difference of power) design, there is different springs to select different pressures and pressure difference.
In the present embodiment, valve body 10 and spool 30 are the oil film seal of plunger pattern.It is rigidly close due to using oil film
The mode of envelope, therefore it is vulnerable to solve the problems, such as that 30 soft seal of spool is used for a long time.Meanwhile oil film seal itself has lubrication
Function be used for a long time without maintenance so service life is very long.In addition, oil film seal can also realize valve body 10 and spool
The function of No leakage between 30.
In the present embodiment, spool 30 passes through Surface hardening treatment.Above structure makes between spool 30 and valve body 10
Cooperate more smooth, enables the movement of spool 30 freely.Similarly, above structure also makes between spool 30 and valve pocket 40
Cooperate it is more smooth, further such that spool 30 can movement freely.Preferably, in the present embodiment, spool 30 through overheat at
Reason is to reach Surface hardening treatment.Cure process is suitable to RHC60 range in RHC36, realizes the function of No leakage.
It should be noted that as shown in Figures 1 to 4, in the present embodiment, since spool 30 needs step mobile,
Spring uses the design that ratio of height to diameter is greater than 2.6.And if what the spring for not being greater than 2.6 to above-mentioned ratio of height to diameter was positioned
Words, may cause spring can not keep required power in longer one section.Therefore, in the present embodiment, spring relies on bullet
Property part accommodating chamber cavity wall positioned with guarantee spring can method kept in longer one section required for power.
Preferably, in the present embodiment, spool 30 can be the design of one or more snippets structure.
As shown in figure 5, the hydraulic system according to the present embodiment includes: air pump present invention also provides a kind of hydraulic system
Converter 50, switch valve 70 and pressure valve.Wherein, air pump converter 50 has the gentle pump discharge 52 of air pump entrance 51, air pump
Entrance 51 is connected to gas source 60.Switch valve 70 is arranged between air pump converter 50 and gas source 60, is provided with stream on switch valve 70
Body entrance 71, switch valve 70 have open state and closed state, and when fluid inlet 71 has fluid to enter, switch valve 70 is in
Closed state, switch valve 70 cuts off the channel between air pump entrance 51 and gas source 60, when fluid inlet 71 enters without fluid,
When switch valve 70 is in the open state, air pump entrance 51 is connected to gas source 60.Pressure valve is above-mentioned pressure valve, the of pressure valve
The import 121a of one accommodating chamber 121 is connect with air pump outlet 52, the stream of the first flow channels 1211 and switch valve 70 of pressure valve
Body entrance 71 connects, and the second flow channels 1212 of pressure valve are connect with the fuel tank 80 of hydraulic system.Since above-mentioned pressure valve has
Have the advantages that control precision is higher, do not need external power supply, therefore is also had the above advantages with its hydraulic system.
Specifically, in the present embodiment, when the fluid pressure (oil pressure) in system reaches the first predetermined pressure, pressure valve
The first flow channels 1211 open, a part of oil liquid from the first flow channels 1211 by fluid inlet 71 flow into switch valve 70
It is interior.The channel between air pump entrance 51 and gas source 60 can be cut off after switch valve 70 receives oil liquid.In this way, air pump converter 50
Gas source will no longer be received, and no longer convert hydraulic (no longer pressurizeing to system) for gas source, thus the pressure in guarantee system
Power does not exceed the first predetermined pressure.And when the fluid pressure (oil pressure) in system reaches the second predetermined pressure, pressure valve
First flow channels 1211 are closed, and oil liquid is no longer flow into switch valve 70.Switch valve 70 is due to being not received by oil liquid and by gas
Channel between pump intake 51 and gas source 60 is connected to.In this way, air pump converter 50 continues to receive gas source and converts gas source
For hydraulic (continue pressurize to system), so that the pressure in guarantee system is not less than the second predetermined pressure.It should be noted that
When the spool 30 of pressure valve is in first position, the second flow channels are connected to fuel tank 80, so that the oil in the second accommodating chamber
Liquid returns in fuel tank 80.
It should be noted that in the present embodiment, pressure valve can be designed as plug-in structure or board-like connection structure,
To be suitable for the structure design selection of various hydraulic systems.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of pressure valve characterized by comprising
Valve body (10), has mutual disconnected elastic component accommodating chamber (11) and spool accommodating chamber (12), and the spool accommodates
Chamber (12) includes the first accommodating chamber (121) and the close elastic component accommodating chamber for being located at first accommodating chamber (121)
(11) the second accommodating chamber (122), fluid enter the valve body (10) from the import (121a) of first accommodating chamber (121)
It is interior, the first flow channels (1211), the second overcurrent are provided in the cavity wall of first accommodating chamber (121) of the valve body (10)
Channel (1212) and third flow channels (1213), second flow channels (1212) are located at first flow channels
(1211) the side close to the elastic component accommodating chamber (11), the third flow channels (1213) are connected to first overcurrent
Channel (1211) and second accommodating chamber (122), second flow channels (1212) and first flow channels
(1211) and the third flow channels (1213) are not connected to mutually；
Elastic component (20), setting is in the elastic component accommodating chamber (11)；
Spool (30) is movably disposed in the spool accommodating chamber (12), and the first end of the spool (30) is located at described
In first accommodating chamber (121), the second end of the spool (30) protrude into the elastic component accommodating chamber (11) and with the elasticity
Part (20) is supported, and the spool (30) has first position, the second position and the third place, when the spool (30) are positioned at described
When first position, the spool (30) blocks first flow channels (1211), so that first accommodating chamber (121) and institute
The second accommodating chamber (122) to be stated not to be connected to mutually, second flow channels (1212) are connected to second accommodating chamber (122), when
When the spool (30) is located at the second position, the spool (30) blocks first flow channels (1211) and described the
Two flow channels (1212), when the spool (30) is located at the third place, first accommodating chamber (121) and described the
Two accommodating chambers (122) are connected to by the third flow channels (1213), and second flow channels (1212) are by the spool
(30) it blocks, a part of fluid is flowed out from first flow channels (1211), remaining described fluid flows into described second
Accommodating chamber (122),
Wherein, when the pressure of the fluid is gradually increased, the spool (30) is gradually moved to described from the first position
The second position, when the pressure of the fluid reaches the first predetermined pressure, the spool (30) generates phase step type displacement, the valve
Core (30) is moved quickly to the third place from the second position, when the pressure of the fluid is gradually reduced, the valve
Core (30) is gradually moved to the second position from the third place, when the pressure of the fluid reaches the second predetermined pressure, institute
It states spool (30) and generates phase step type displacement, the spool (30) is moved quickly to the first position, institute from the second position
Stating spool (30) includes the set gradually on from the spool accommodating chamber (12) to the direction of the elastic component accommodating chamber (11)
One shell of column (31), the second shell of column (32) and third shell of column (33), first shell of column (31) are movably disposed at described
In one accommodating chamber (121), second shell of column (32) and the third shell of column (33) are movably disposed at described second and hold
It receives in chamber (122), the sectional area S of first shell of column (31)1, second shell of column (32) sectional area S2With the third column
The sectional area S of section (33)3Between relationship be S1< S3< S2。
2. pressure valve according to claim 1, which is characterized in that first shell of column (31) include cooperation section (311) with
And the gap section (312) of the one end of setting in cooperation section (311) close to the elastic component accommodating chamber (11), the cooperation section
(311) it is adapted with the cavity wall of first accommodating chamber (121), the gap section (312) and first accommodating chamber (121)
There is gap, second flow channels (1212) are connected to by the gap with second accommodating chamber (122) between cavity wall.
3. pressure valve according to claim 2, which is characterized in that first shell of column (31) is cylindrical section, the cooperation
The diameter d of section (311)1With the diameter d of the gap section (312)2Between relationship be d1> d2。
4. pressure valve according to claim 2, which is characterized in that the third shell of column (33) is cylindrical section, the cooperation
The diameter d of section (311)1With the diameter D of the third shell of column (33)3Between relationship be d1/D3Between 0.85-0.99.
5. pressure valve according to claim 2, which is characterized in that first flow channels (1211) are the first overcurrent
Hole, second flow channels (1212) are the second flowing hole, and the length of cooperation section (311) is equal to first flowing hole
One end far from the elastic component (20) to the edge between the one end of close elastic component (20) of second flowing hole
Distance on valve body (10) axis direction.
6. pressure valve according to claim 5, which is characterized in that the third flow channels (1213) are third overcurrent
Hole, the third flowing hole extend along the axis direction of the valve body (10), one end of the third flowing hole and described first
Flowing hole connection, the other end of the third flowing hole are connected to second accommodating chamber (122).
7. pressure valve according to claim 1, which is characterized in that the pressure valve further includes valve pocket (40), the valve pocket
(40) it is arranged between the elastic component accommodating chamber (11) and the spool accommodating chamber (12), has on the valve pocket (40) and keep away
Allow hole, the second end of the spool (30) is pierced by out of described avoid holes, and is supported with the elastic component (20).
8. pressure valve according to claim 7, which is characterized in that be column between the spool (30) and the valve pocket (40)
The oil film seal of plunger type formula.
9. pressure valve according to claim 7, which is characterized in that the valve body (10) includes the first valve body interconnected
(10a) and the second valve body (10b), the inner cavity of first valve body (10a) form the elastic component accommodating chamber (11), and described second
The inner cavity of valve body (10b) forms the spool accommodating chamber (12), and the valve pocket (40) is folded in first valve body (10a) and institute
It states between the second valve body (10b), is provided with oil leak hole (13) on second valve body (10b), the first of the oil leak hole (13)
End be connected to second flow channels (1212), the second end of the oil leak hole (13) be located at second valve body (10b) and
The junction of the valve pocket (40), to prevent the fluid from entering in the elastic component accommodating chamber (11).
10. pressure valve according to claim 1, which is characterized in that the elastic component (20) includes spring (21) and leads
To portion (22), in the spring (21) close to the one end of the spool (30), the elastic component holds for guide part (22) setting
Chamber (11) of receiving includes directed cavity (111) and spring accommodating chamber (112), and the spring (21) is arranged in the spring accommodating chamber
(112) in, the guide part (22) is movably disposed in the directed cavity (111) and the chamber with the directed cavity (111)
Wall adaptation.
11. pressure valve according to claim 1, which is characterized in that the valve body (10) is plunger with the spool (30)
The oil film seal of pattern.
12. pressure valve according to claim 1, which is characterized in that the spool (30) passes through Surface hardening treatment.
13. a kind of hydraulic system characterized by comprising
Air pump converter (50), with air pump entrance (51) gentle pump discharge (52), the air pump entrance (51) and gas source (60)
Connection；
Switch valve (70) is arranged between the air pump converter (50) and the gas source (60), sets on the switch valve (70)
It is equipped with fluid inlet (71), the switch valve (70) has open state and closed state, when the fluid inlet (71) has stream
When body enters, the switch valve (70) is in the closed state, the switch valve (70) cut off the air pump entrance (51) with
Channel between the gas source (60), when the fluid inlet (71) enters without fluid, the switch valve (70) is in institute
When stating open state, the air pump entrance (51) is connected to the gas source (60)；
Pressure valve, the pressure valve are pressure valve described in any one of claims 1 to 12, and the first of the pressure valve accommodates
The import (121a) of chamber (121) is connect with air pump outlet (52), the first flow channels (1211) of the pressure valve and institute
State the fluid inlet (71) connection of switch valve (70), the second flow channels (1212) of the pressure valve and the hydraulic pressure system
The fuel tank (80) of system connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078387.8A CN106763899B (en) | 2016-11-29 | 2016-11-29 | Pressure valve and hydraulic system with it |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078387.8A CN106763899B (en) | 2016-11-29 | 2016-11-29 | Pressure valve and hydraulic system with it |
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| CN106763899A CN106763899A (en) | 2017-05-31 |
| CN106763899B true CN106763899B (en) | 2019-02-26 |
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| CN107606235B (en) * | 2017-09-25 | 2023-10-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Control valve structure and compressor with same |
| CN109296527B (en) * | 2018-12-01 | 2020-03-17 | 潍坊亚油机械有限公司 | Control valve for reciprocating pump |
| CN112283423B (en) * | 2020-11-13 | 2022-09-09 | 哈尔滨工业大学 | Pressure control device for water-based liquid medium |
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|---|---|---|---|---|
| CN101668973A (en) * | 2007-03-31 | 2010-03-10 | 麦克罗斯塔克公司 | Pilot operated spool valve |
| CN101713421A (en) * | 2008-10-06 | 2010-05-26 | 罗伯特.博世有限公司 | Slide valve for hydraulic control in a motor vehicle automatic transmission |
| CN105864139A (en) * | 2016-05-18 | 2016-08-17 | 山东常林机械集团股份有限公司 | Hydraulic operated directional control valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01120492A (en) * | 1987-11-02 | 1989-05-12 | Sumitomo Heavy Ind Ltd | Direction change over valve |
| CN102575782B (en) * | 2009-08-17 | 2014-04-09 | 盾安美斯泰克股份有限公司 | Micromachined device and control method |
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2016
- 2016-11-29 CN CN201611078387.8A patent/CN106763899B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101668973A (en) * | 2007-03-31 | 2010-03-10 | 麦克罗斯塔克公司 | Pilot operated spool valve |
| CN101713421A (en) * | 2008-10-06 | 2010-05-26 | 罗伯特.博世有限公司 | Slide valve for hydraulic control in a motor vehicle automatic transmission |
| CN105864139A (en) * | 2016-05-18 | 2016-08-17 | 山东常林机械集团股份有限公司 | Hydraulic operated directional control valve |
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