CN107781250A - Novel load sensitive balance valve - Google Patents
Novel load sensitive balance valve Download PDFInfo
- Publication number
- CN107781250A CN107781250A CN201610745937.0A CN201610745937A CN107781250A CN 107781250 A CN107781250 A CN 107781250A CN 201610745937 A CN201610745937 A CN 201610745937A CN 107781250 A CN107781250 A CN 107781250A
- Authority
- CN
- China
- Prior art keywords
- valve
- load
- oil cylinder
- control
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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
- 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
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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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
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of novel load sensitive balance valve, by check valve, automatically control choke valve and hydraulic control one-way valve three parts form.Using the structure of load-sensitive, the left end for controlling piston is fed back to pressure signal caused by oil cylinder cavity of resorption by loading, controls the amount of opening of choke valve；Throttle valve core is manufactured into cone structure, is advantageous to the long-time positioning of load；When reversal valve middle position works, now system is in unloading condition, and hydraulic control one-way valve closes under spring and oil cylinder in the presence of cavity pressure；The left end that control piston is fed back to pressure signal caused by oil cylinder cavity of resorption will be loaded, control the open amount of choke valve；When controlling piston being moved to the right in the presence of the hydraulic pressure of the left side, spring is compressed, and the quantity of choke valve aperture is reduced.
Description
Art
The present invention relates to a kind of novel load sensitive balance valve, mining engineering machinery is applied especially to.
Background technology
The it is proposed of load-sensitive concept starts from the 1960s, it refers to detect load pressure, stream by sensing
Amount and changed power signal, are fed back to hydraulic system, realize Energy Saving Control, flow and speed regulating control, constant moment of force control, power
Square limitation, power limitation control, power limit, rotating speed limitation, action are matched etc. with prime mover power and controlled.Load-sensitive is one
System concept, therefore referred to as load sensitive system, its used control mode include hydraulic control and Electronic Control.And load
The research of sensitive technology starts from the 1970s.
Load sensitive system is widely used in engineering machinery with good energy-conservation and control characteristic.Such system passes through
Feedback oil circuit automatically passes to load pressure signal in " sensitivity " chamber of hydraulic power source, and then controls the operation shape of oil supply unit
State, it is almost only provided the hydraulic power required for load to system, so as to reduce power loss to greatest extent, improve
The capacity usage ratio of prime mover.Experimental study shows that the pressure transmission characteristic for feeding back oil circuit has important influence to it,
The concept of electro-hydraulic load sensitive system is proposed, wherein load signal is measured by pressure sensor, and real as electronic signals
Now quickly selection and transmission, the dynamic characteristic of system are significantly improved.However, load signal is transmitted using hydraulic pipeline
Mode due to having the advantages that simple in construction, cost is low, high reliability and strong antijamming capability, obtained in engineering machinery field
Obtained and be more widely applied.Thus, reasonably selection feedback oil circuit, can stablize and rapidly transmit load signal,
Had great significance for the overall performance for improving load sensitive system.Company, company and company all successively devise each
Load sensitive device and system, and the static pressure transmission being successfully applied in Mobile engineering machine, agricultural machinery and injection machine
In system.
The content of the invention
In order to overcome the load that existing balanced valve can not solve thoroughly accelerate descending, out of control, " nodding " phenomenon and
The problems such as system power loss is excessive, the present invention provide a kind of novel load sensitive balance valve, the type novel load sensitive balance
Valve is advantageous to the long-time positioning of load, and the valve main spool spring substitutes single effect spring using series connection segmenting function spring,
This design makes valve element more sensitive for the change of load；Ensure to lead to fluid full flow on the premise of enough back pressures are produced
Cross, it is smoothly descending at full speed with proof load.
The technical solution adopted for the present invention to solve the technical problems is：Novel load sensitive balance valve by check valve,
Choke valve and hydraulic control one-way valve three parts composition are automatically controlled, the function of three kinds of valves has been integrated into a valve, formd
One combination valve；The load that can not be thoroughly solved to fundamentally solve conventional balanced valve accelerates descending, out of control, " nodding "
The problems such as phenomenon and excessive system power loss, hydraulic balance valve uses the structure of load-sensitive, will load to oil cylinder
Pressure signal caused by cavity of resorption feeds back to the left end of control piston, controls the amount of opening of choke valve, makes the amount of opening ensure to produce
Full flow is steadily descending with proof load by fluid on the premise of raw enough back pressures.
For novel load sensitive balance valve in static carrying, throttle valve core is manufactured into cone structure, is advantageous to load
Position for a long time；The valve main spool spring substitutes single effect spring using series connection segmenting function spring, and this design makes valve element
Change for load is more sensitive；Hydraulic balance valve uses load-sensitive design principle, and load is produced to oil cylinder cavity of resorption
Raw pressure signal feeds back to the left end of control piston, controls the open amount of choke valve.
The beneficial effects of the invention are as follows：The novel load sensitive balance valve valve element that worked in static carrying is designed to the conical surface
Structure, be advantageous to the long-time positioning of load；The left side that control piston is fed back to pressure signal caused by oil cylinder cavity of resorption will be loaded
End, the open amount of choke valve is controlled, ensure to make on the premise of producing enough back pressures fluid full flow by with proof load at full speed
It is smoothly descending；Single effect spring is substituted using series connection segmenting function spring, this design makes change of the valve element for load
Change more sensitive.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is load-sensitive balancing valve structure schematic diagram.
In Fig. 1,1. hydraulic pumps, 2. reversal valves, 3. hydraulic control one-way valves control piston, 4. hydraulic control one-way valves, 5. hydraulic pressure
Cylinder, 6. check valves, 7. throttling valve cores, 8. control pistons, 9. overflow valves.
Embodiment
Preferably, novel load sensitive balance valve by check valve, automatically control choke valve and hydraulic control one-way valve three
It is grouped into, the function of three kinds of valves has been integrated into a valve, forms a combination valve.
Preferably, in order to fundamentally solve the load that conventional balanced valve can not solve thoroughly accelerate it is descending, out of control,
The problems such as " nodding " phenomenon and excessive system power loss, hydraulic balance valve uses the structure of load-sensitive, will load
The left end of control piston is fed back to pressure signal caused by oil cylinder cavity of resorption, the amount of opening of choke valve is controlled, the amount of opening is existed
Ensure that full flow is steadily descending with proof load by fluid on the premise of producing enough back pressures.
Preferably, for novel load sensitive balance valve in static carrying, throttle valve core is manufactured into cone structure, is advantageous to
The long-time positioning of load；
Preferably, during raising operating mode, when the right position of reversal valve works, pressure oil enters balanced valve from A mouths, and check valve above is opened on top
6, balanced valve is flowed out from B mouths, into hydraulic cylinder cavity of resorption, so as to promote load to rise.
Preferably, during static carrying operating mode, when reversal valve middle position works, now system is in unloading condition, fluid-control one-way
Valve 4 is closed under spring and oil cylinder in the presence of cavity pressure, and hydraulic cylinder is locked, because fluid-control one-way valve element is close using the conical surface
Envelope, so oil cylinder can be in the locked position for a long time.
Preferably, when load declines operating mode, when the left position of reversal valve works, pressure oil enters cylinder upper cavity oil, a part of pressure
Oil acts on the right-hand member of hydraulic control one-way valve control piston 3 by C mouths, so as to promote hydraulic control one-way valve control piston to open hydraulic control list
To valve 4, and the pressure that oil cylinder cavity of resorption is acted on by the deadweight loaded acts on control piston 8 by balanced valve inner passage
Left side, so that choke valve 7 has corresponding open amount, the fluid of oil cylinder cavity of resorption to B mouths is set to pass through choke valve with full flow
And the hydraulic control one-way valve opened, fuel tank is flowed back to from A mouths, so in the case where producing enough back pressures, load is able to steady complete
The decline of speed.
The preferable valve main spool spring substitutes single effect spring using series connection segmenting function spring, and this design makes valve
Core is more sensitive for the change of load.
Preferably, hydraulic balance valve uses load-sensitive principle, will load to pressure signal caused by oil cylinder cavity of resorption
The left end of control piston is fed back to, controls the open amount of choke valve, makes the open amount on the premise of ensureing to produce enough back pressures
Pass through fluid full flow smoothly descending at full speed with proof load.
Preferably, in segmenting function spring works of connecting, when control piston moves right in the presence of the hydraulic pressure of the left side
When, spring is compressed, and the quantity of choke valve aperture is reduced, and is at this moment played serial spring and is worked, when two springs are compressed, works as connection
After the connecting rod of two springs moves a segment distance, spring is just no longer worked, and only remaining spring is compressed.
Claims (5)
1. novel load sensitive balance valve, by check valve, choke valve is automatically controlled and hydraulic control one-way valve three parts form, it is special
Sign is：Using the structure of load-sensitive；Throttle valve core is manufactured into cone structure；Hydraulic control one-way valve is in spring and oil cylinder cavity of resorption
Closed in the presence of pressure；The left end that control piston is fed back to pressure signal caused by oil cylinder cavity of resorption, control throttling will be loaded
The open amount of valve.
2. novel load sensitive balance valve according to claim 1, it is characterized in that：Hydraulic balance valve is quick using loading
The structure of sense, the left end for controlling piston is fed back to pressure signal caused by oil cylinder cavity of resorption by loading, controls the opening of choke valve
Amount, make amount of opening full flow on the premise of ensureing to produce enough back pressures steadily descending with proof load by fluid.
3. novel load sensitive balance valve according to claim 1, it is characterized in that：Novel load sensitive balance valve is static
During carrying, throttle valve core is manufactured into cone structure, is advantageous to the long-time positioning of load.
4. novel load sensitive balance valve according to claim 1, it is characterized in that：When reversal valve middle position works, it is now
System is in unloading condition, and hydraulic control one-way valve is closed under spring and oil cylinder in the presence of cavity pressure, and hydraulic cylinder is locked, due to
Fluid-control one-way valve element uses conical surface seal, so oil cylinder can be in the locked position for a long time.
5. novel load sensitive balance valve according to claim 1, it is characterized in that by load to pressure caused by oil cylinder cavity of resorption
Force signal feeds back to the left end of control piston, controls the open amount of choke valve, makes the open amount ensure to produce enough back pressures
Under the premise of make fluid full flow pass through, with proof load at full speed smoothly it is descending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610745937.0A CN107781250A (en) | 2016-08-29 | 2016-08-29 | Novel load sensitive balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610745937.0A CN107781250A (en) | 2016-08-29 | 2016-08-29 | Novel load sensitive balance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107781250A true CN107781250A (en) | 2018-03-09 |
Family
ID=61440891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610745937.0A Pending CN107781250A (en) | 2016-08-29 | 2016-08-29 | Novel load sensitive balance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107781250A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999843A (en) * | 2018-09-07 | 2018-12-14 | 三汽车起重机械有限公司 | Fall width hydraulic system and crane |
| CN110477999A (en) * | 2019-08-29 | 2019-11-22 | 湖南瀚德微创医疗科技有限公司 | A kind of surgical clamp exporting constant clamping force |
-
2016
- 2016-08-29 CN CN201610745937.0A patent/CN107781250A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999843A (en) * | 2018-09-07 | 2018-12-14 | 三汽车起重机械有限公司 | Fall width hydraulic system and crane |
| CN110477999A (en) * | 2019-08-29 | 2019-11-22 | 湖南瀚德微创医疗科技有限公司 | A kind of surgical clamp exporting constant clamping force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180309 |