CN106640817B - The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump - Google Patents
The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump Download PDFInfo
- Publication number
- CN106640817B CN106640817B CN201710005627.XA CN201710005627A CN106640817B CN 106640817 B CN106640817 B CN 106640817B CN 201710005627 A CN201710005627 A CN 201710005627A CN 106640817 B CN106640817 B CN 106640817B
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- hydraulic
- hydraulic fluid
- fluid ports
- 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.)
- Active
Links
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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F15B13/026—Pressure compensating 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to engineering machinery more particularly to a kind of pressure compensation type energy-saving control valves closing shunting hydraulic system suitable for double pump, include three-way pressure compensating device, damping hole, check valve, hydraulic-control throttling valve, pressure-control valve, unloading valve and hydraulic fluid port.Control port connection is taken respectively from workload signal and pilot control signal；The pressure difference of hydraulic-control throttling valve is set by three-way pressure compensating device；The aperture of the hydraulic-control throttling valve is adjusted according to pilot signal, flow needed for output services system.The present invention adds three-way pressure compensating device in existing double pump closes shunting Load Relief System and hydraulic-control throttling valve group is closed, so that current quantitative pump opens middle position overflowing and speed system upgrade into constant displacement pump load sensitive system, it realizes that work system is adaptive by by-pass tee pressure compensator Low-pressure load discharge and constant displacement pump load pressure, and then realizes that the flow unrelated with variation is loaded precisely exports.
Description
Technical field
The present invention relates to engineering machinery more particularly to a kind of energy saving controls for closing shunting Load Relief System suitable for loading machine double pump
Valve processed.
Background technology
Loading machine is that a kind of operating efficiency is high, widely used engineering machinery, and hydraulic system is mainly by working hydraulic pressure system
System and steering hydraulic system composition.The existing loader hydraulic system overwhelming majority uses double pump system, and general there are one steering pumps
And working-machine pump now generally uses interflow pattern, i.e. double pump pressure-gradient control valve steering system substantially effectively to utilize the flow of two pumps
System and double pump close shunting Load Relief System.Double pump pressure-gradient control valve steering is at low cost, but loading machine is in combinational acting（It cuts on loading machine side
It is promoted into side）Tractive force will not improve；Double pump conjunction, which shunts Load Relief System, which has double pump fuel feeding, turns to preferential, conjunction shunts, sets up
Pressure unloading function rationally utilizes engine power, improves overall operation efficiency, become existing loader dual-pump combining
System preferred configuration.Another domestic existing loader hydraulic system has full fixed dilivery hydraulic system, determines variable delivery hydraulic system etc., job family
It unites the system for being all made of constant displacement pump, the widely used center six of opening of paced work system leads to multi-way valve therewith, and speed governing is using bypass
The combination of throttling and meter in, speed governing effect is throttled by valve rod, and it is real that control goes the amount of opening of oil cylinder and oil return box
Existing.Overcome load pressure due to being the pressure established by meter out, governor control characteristics is by load pressure and oil pump stream
The influence of amount.Whole working load pressure be it is unstable vary, the flow of hydraulic pump is also constantly changing, therefore makes it
Speed governing maneuvering performance is very unstable, manipulates difficult；And valve rod steering force is big, since load pressure variation causes valve port △ P to become
Change, hydraulic power variation causes valve rod steering force to change, and the scrambling of steering force keeps vernier control more difficult.In short, the oil
Road poor controllability, it is highly difficult that operator, which will accurately control control equipment, leans on operator's feeling, experience entirely and sends out when participating in the cintest
It waves.
Invention content
In view of the above-mentioned problems, it is an object of the invention to propose that the double pump that is suitable for of a kind of energy saving and accurate output flow closes
Shunt the pressure compensation type energy-saving control valve of hydraulic system.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of double pump that is suitable for of construction closes shunting hydraulic system
Pressure compensation type energy-saving control valve, it is characterised in that：Include three-way pressure compensating device, damping hole, check valve, hydraulic-control throttling
Valve, pressure-control valve, unloading valve and P1 hydraulic fluid ports, P2 hydraulic fluid ports, P3 hydraulic fluid ports, LS1 hydraulic fluid ports, LS2 hydraulic fluid ports, T1 hydraulic fluid ports；Three-way pressure
The import of compensator is connected with the import of P1 hydraulic fluid ports, unloading valve, check valve, and outlet and the unloading valve of three-way pressure compensating device go out
Mouth, pressure control valve outlet are connect after connecting with T1 hydraulic fluid ports；One-way valved outlet is connected in the import of P3 hydraulic fluid ports, hydraulic-control throttling valve,
And the pressure control mouth of pressure-control valve；The spring cavity of unloading valve is connected in the import of pressure-control valve；The connection of P1 hydraulic fluid ports is fixed
Amount pump, P2 hydraulic fluid ports connect work system, and P3 hydraulic fluid ports are connect with steering, and LS1 hydraulic fluid ports connect steering and transmit work and bear
Information carrying number, LS2 hydraulic fluid ports are derived from pilot control signal；Pressure difference between the P2 hydraulic fluid ports of hydraulic-control throttling valve, P3 hydraulic fluid ports is by three-way pressure
Compensator is set；The aperture of the hydraulic-control throttling valve is adjusted according to pilot signal, flow needed for output services system.
The present invention adds three-way pressure compensating device in existing double pump closes shunting Load Relief System and hydraulic-control throttling valve group is closed, and makes
It obtains current quantitative pump and opens middle position overflowing and speed system upgrade into constant displacement pump load sensitive system, realize work system and pass through bypass
Three-way pressure compensating device Low-pressure load discharge and constant displacement pump load pressure are adaptive, and then realize that the flow unrelated with load variation is accurate
Output：
（1）In constant displacement pump pressure compensating system, when multi-way valve is in middle position and does not work, by three-way pressure compensating device to pump
Off-load is realized, to pumping up decompression and protective effect.Three-way pressure compensating device pressure unloading is low simultaneously, when realization system does not work
It is energy saving.
（2）When the system is operating, multi-way valve import and outlet pressure are poor when three-way pressure compensating device ensure that load variation
It is constant, system is realized precisely to be exported with the unrelated flow of load variation, that is, flows through the size and spool of multi-way valve flow
Displacement is related, unrelated with load variations；It can not only realize that the load of the constant i.e. pressure compensator of pressure difference before and after flow controller is mended very well
The effect of repaying, and it is poor that the outlet of pump can be made only to be higher by a level pressure than load pressure in real time, to realize that load pressure is adaptive
It answers.
Description of the drawings
Fig. 1 is schematic diagram of the embodiment of the present invention.
Description of symbols in figure：1-three-way pressure compensating device, 2-damping holes, 3-check valves, 4-hydraulic-control throttling valves, 5-
Pressure-control valve, 6-unloading valves
Specific implementation mode
To further understand the present invention, technical scheme of the present invention is done into one with reference to the accompanying drawings and detailed description
Step explanation, referring to Fig. 1：
The present embodiment is as shown in Figure 1, the pressure compensation type according to embodiments of the present invention for closing shunting hydraulic system suitable for double pump
Energy-saving control valve is by three-way pressure compensating device 1, damping hole 2, check valve 3, hydraulic-control throttling valve 4, pressure-control valve 5,6 groups of unloading valve
At, and with P1 hydraulic fluid ports, P2 hydraulic fluid ports, P3 hydraulic fluid ports, LS1 hydraulic fluid ports, LS2 hydraulic fluid ports, T1 hydraulic fluid ports.The import of three-way pressure compensating device 1 with
The import of P1 hydraulic fluid ports, unloading valve 6, check valve 3 is connected, and outlet and the outlet of unloading valve 6, the pressure of three-way pressure compensating device 1 control
The outlet of valve 5 is connect after connecting with T1 hydraulic fluid ports；The outlet of check valve 3 is connected in P3 hydraulic fluid ports, the import of hydraulic-control throttling valve 4 and pressure
The pressure control mouth of control valve 5；The spring cavity of unloading valve 6 is connected in the import of pressure-control valve 5.P1 hydraulic fluid ports connect constant displacement pump
Oil outlet, the multi-way valve that P2 hydraulic fluid ports connect work system provide fluid, and P3 hydraulic fluid ports are connect with steering, and LS1 hydraulic fluid ports transmit work
Make load signal to steering, decides whether to collaborate to work system.LS2 hydraulic fluid ports are derived from pilot control signal, described in control
The aperture of hydraulic-control throttling valve 4, to flow needed for output services system.Pressure between the P2 hydraulic fluid ports of hydraulic-control throttling valve 4, P3 hydraulic fluid ports
Difference is set by three-way pressure compensating device 1.
The operation principle of the present invention is that：
（1）When work system does not work.The pilot signal pressure of work system is zero, and hydraulic-control throttling valve 4 is in right position, valve
Mouth is closed, and three-way pressure compensating device 1 is in maximum open at this time, and the fluid of constant displacement pump is through three-way pressure compensating device 1
Low-pressure load discharge oil return box.Because the pilot signal pressure of work system is zero, valve core of multiway valve is in middle position, workload signal pressure
Power is zero, therefore LS1 hydraulic fluid port feedback-less oil pressure is transferred to steering, and then steering is not collaborated to work system.
（2）When work system works.When work system has the input of pilot signal pressure, hydraulic-control throttling valve 4 is in opening
Pressure difference is established at state, 1 both ends of three-way pressure compensating device.When pressure difference is more than spring setting value, spool moves downward, and makes threeway pressure
Force compensating device 1 is connected with back oil road, and constant displacement pump inputs multi-way valve by flow needed for work system, and excess traffic is mended through three-way pressure
Repay 1 direct oil return box of device；As pilot signal pressure is stepped up, the valve port opening of hydraulic-control throttling valve 4 incrementally increases, hydraulic control section
The front and back pressure difference of stream valve 4 gradually reduces, and then the three-way pressure compensating device 1 in flow control valve is made gradually to be closed with drainback passage
Small, after pressure difference is less than spring setting value, three-way pressure compensating device 1 is closed with drainback passage, and quantitative pump discharge fully enters work
Make system.Constant, the system of hydraulic-control throttling valve 4 import and outlet pressure difference when three-way pressure compensating device 1 ensure that load variation
The flow unrelated with load variation is realized precisely to export, that is, the size for flowing into multi-way valve flow is only related with spool displacement, with
Load variation is unrelated；The load compensation effect of the constant i.e. pressure compensator of pressure difference before and after hydraulic-control throttling valve 4 can not only be realized very well,
And it is poor that the outlet pressure of pump can be made only to be higher by a level pressure than load pressure in real time, to realize that load pressure is adaptive.
（3）Work system pressure is more than unloading valve.When work system pressure rise sets pressure to more than pressure-control valve 5
When, pressure-control valve 5 is opened, and for constant displacement pump fluid by unloading valve 6 with Low-pressure load discharge oil return box, work system is independent by steering pump
Fuel feeding.
Claims (1)
1. a kind of pressure compensation type energy-saving control valve closing shunting hydraulic system suitable for double pump, it is characterised in that：Include three
Logical pressure compensator（1）, damping hole（2）, check valve（3）, hydraulic-control throttling valve（4）, pressure-control valve（5）, unloading valve（6）, with
And P1 hydraulic fluid ports, P2 hydraulic fluid ports, P3 hydraulic fluid ports, LS1 hydraulic fluid ports, LS2 hydraulic fluid ports, T1 hydraulic fluid ports；Three-way pressure compensating device（1）Import and P1 oil
Mouth, unloading valve（6）, check valve（3）Import be connected, three-way pressure compensating device（1）Outlet and unloading valve（6）Outlet, pressure
Control valve（5）Outlet is connect after connecting with T1 hydraulic fluid ports；Check valve（3）Outlet is connected in P3 hydraulic fluid ports, hydraulic-control throttling valve（4）Into
Mouth and pressure-control valve（5）Pressure control mouth；Unloading valve（6）Spring cavity connect in pressure-control valve（5）Import；
P1 hydraulic fluid ports connect constant displacement pump, and P2 hydraulic fluid ports connect work system, and P3 hydraulic fluid ports are connect with steering, and LS1 hydraulic fluid ports connect steering
And workload signal is transmitted, LS2 hydraulic fluid ports are derived from pilot control signal；Hydraulic-control throttling valve（4）P2 hydraulic fluid ports, between P3 hydraulic fluid ports
Pressure difference is by three-way pressure compensating device（1）Setting；The hydraulic-control throttling valve（4）Aperture adjusted according to pilot signal, output services
Flow needed for system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005627.XA CN106640817B (en) | 2017-01-04 | 2017-01-04 | The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005627.XA CN106640817B (en) | 2017-01-04 | 2017-01-04 | The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640817A CN106640817A (en) | 2017-05-10 |
| CN106640817B true CN106640817B (en) | 2018-11-13 |
Family
ID=58844211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710005627.XA Active CN106640817B (en) | 2017-01-04 | 2017-01-04 | The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640817B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671383A (en) * | 2019-11-06 | 2020-01-10 | 徐州海伦哲特种车辆有限公司 | Landing leg automatic leveling hydraulic system |
| JP7412181B2 (en) * | 2020-01-10 | 2024-01-12 | 川崎重工業株式会社 | Hydraulic pump system and control device |
| CN116480648B (en) * | 2023-04-13 | 2025-10-14 | 华中科技大学 | A hydraulic power module and hydraulic control system for ballast tank operations |
| CN120402479B (en) * | 2025-04-03 | 2025-11-28 | 阀毕威阀门有限公司 | Pressure compensation system and method for high-performance throttle valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004033891A1 (en) * | 2004-07-13 | 2006-02-16 | Bosch Rexroth Aktiengesellschaft | Hydraulic control arrangement |
| CN2727469Y (en) * | 2004-08-24 | 2005-09-21 | 上海彭浦巨力工程机械有限公司 | Load feedback pressure adaptation multiway valve |
| CN105986595B (en) * | 2015-02-04 | 2019-10-01 | 卡特彼勒（青州）有限公司 | Hydraulic system and machine for machine |
| CN104929183B (en) * | 2015-05-21 | 2017-03-15 | 徐工集团工程机械股份有限公司科技分公司 | A kind of loader turned to based on Flow amplification determines variable delivery hydraulic system |
| CN104895139B (en) * | 2015-06-12 | 2018-01-16 | 圣邦集团有限公司 | Loading machine quantitative pump and variable pump multiplex control system |
| CN205241000U (en) * | 2015-12-16 | 2016-05-18 | 广州大学 | Safe energy -conserving single cylinder hydraulic pressure elevator system |
| CN106224306B (en) * | 2016-09-29 | 2019-03-15 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic system with flow compensation |
-
2017
- 2017-01-04 CN CN201710005627.XA patent/CN106640817B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106640817A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106759621B (en) | Load-sensitive formula loading machine determines variable delivery hydraulic system | |
| CN103047208B (en) | Load-sensitive electro-hydraulic proportional multi-way valve | |
| CN106480927B (en) | Determine varying load sensitivity combining hydraulic system and loading machine | |
| CN106284481B (en) | Determine varying load sensitivity combining hydraulic system and loading machine | |
| CN106640817B (en) | The pressure compensation type energy-saving control valve of shunting hydraulic system is closed suitable for double pump | |
| CN111255007B (en) | Loader constant-variable hydraulic system based on load signal direct control | |
| CN102042273B (en) | Hydraulic control circuit and method | |
| CN112064714B (en) | Novel hydraulic excavator flow control system | |
| CN102720711A (en) | Automatic-switch type load sensing hydraulic system | |
| CN112746996B (en) | Load sensitive system and engineering hoisting machinery | |
| CN106499682A (en) | A kind of hydraulic system for pile driving barge | |
| CN102261351A (en) | Simple proportional load sensitive hydraulic system | |
| CN110953197B (en) | Power control hydraulic system and crane | |
| CN105402182B (en) | Load sensing multiple directional control valve and loader hydraulic control system | |
| CN208185091U (en) | Positive control load sensitive system | |
| CN110219842B (en) | Hydraulic system of lifting platform | |
| CN109306976B (en) | Load sensitive control system | |
| CN114909351A (en) | A quantitative closed-center hydraulic system and its working method and control method | |
| CN107477160B (en) | Hydraulic speed control system and construction machinery | |
| CN204958196U (en) | Sensitive multiple unit valve of two -way confluence function load has | |
| CN104179743A (en) | Modularized load-sensitive electric-hydraulic proportional multiway valve | |
| CN109538556B (en) | System for controlling double-pump confluence and engineering machinery | |
| CN204493321U (en) | A kind of load sensing multi-way valve first and multi-way valve | |
| CN104030199B (en) | Forklift hydraulic system with bypass oil way throttling speed regulation loop | |
| CN104179736B (en) | A kind of engineering machinery constant displacement pump speed-regulating hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 317000 358, zhe Road, Dayang street, Taizhou, Zhejiang. Applicant after: Zhejiang Gaoyu Hydraulic Mechanical and Electrical Co., Ltd. Address before: 317000 No. 358, extension Road, Dayang street, Taizhou, Zhejiang. Applicant before: Zhejiang Gaoyu Hydraulic Mechanical and Electrical Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |