CN201144902Y - Hydraulic system for development machine - Google Patents
Hydraulic system for development machine Download PDFInfo
- Publication number
- CN201144902Y CN201144902Y CN 200720185083 CN200720185083U CN201144902Y CN 201144902 Y CN201144902 Y CN 201144902Y CN 200720185083 CN200720185083 CN 200720185083 CN 200720185083 U CN200720185083 U CN 200720185083U CN 201144902 Y CN201144902 Y CN 201144902Y
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- valve
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- hydraulic system
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- development machine
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Abstract
The utility model provides a hydraulic system used for a development machine, belonging to an open hydraulic system. The hydraulic system used for the development machine is characterized in that a constant power load sensitive axial plunger piston variable pump capable of cutting the pressure is connected with a six-way ratio multichannel reversing valve capable of compensating the pressure and sensing the load by a pipeline, the six-way ratio multichannel reversing valve is provided with plate valves which are respectively connected with and controls each executing mechanism, a pressure compensating valve is respectively connected with each plate valve oil inlet pipeline for adjusting a flow value of each plate valve, and a leading control opening of the ratio multichannel valve is connected with a manual ratio leading valve. The whole system has the function of power adaption, increases the ratio of power to weight of the hydraulic system, and solves the problems of the hydraulic system formed by a wheel pump and a manual multichannel valve that the leakage is serious, the power loss is great, the pressure is low, the oil fluid temperature is high and the reliability is low; and a ratio leading handle ensures that a driver can operate more comfortably and safely, and the action is more accurate and the reliability is improved greatly.
Description
Technical field
The utility model belongs to a kind of hydraulic system that is applied on the development machine.
Background technique
Domestic existing development machine mostly is the open system of the manual multi-path reversing valve control of gear pump driven greatly with hydraulic system.This kind system bulk is bigger, and under the general narrow and small situation in mining equipment space, assembling difficulty is big.This kind system is owing to be gear pump driven in addition, and pressure is lower, causes the driving force deficiency easily, also has this system leak amount relatively large, and efficient and reliability are also relatively low.
Summary of the invention
The purpose of this utility model provides a kind of development machine hydraulic system, and it is big to have a power-weight ratio, and is through-flow big, leaks low, the efficient height, level of integration high with have characteristics such as power adaptive functions.
A kind of development machine hydraulic system, it is characterized in that the responsive shaft orientation plunger variable pump of constant power load that has the pressure cut off function connects with six logical type proportional multi-path reversing valves with pressure compensation and load sensing function, each plate valve in the six logical type proportional multi-path reversing valves connects respectively and controls each actuator, in six logical each plate valve of type proportional multi-path reversing valve, pressure-compensated valve is set respectively, be used for adjusting the flow value of each plate valve, the pilot control opening of proportional multi-path valve links to each other with manual proportional pilot valve.
The control mouth of guide's handle is connected with the pilot control opening of proportional multi-path reversing valve, the pressure oil of guide's handle is the low pressure oil that proportional multi-path reversing valve provides, driver's direct control guide handle is adjusted direction and the flow size that changes multiple directional control valve, six logical type proportional multi-path reversing valves pass to coupled power ecad plunger variable pump to flow and pressure demand signal simultaneously, the variable displacement pump real-time variable, to guarantee that adjusted discharge capacity just in time satisfies the demand of load, does not have power dissipation.But when driving a plurality of executive component, for fear of each loop load difference causes when action time the flow major part be diverted to the get on generation of this phenomenon of the lower loop of load, in six logical type proportional multi-path reversing valves, add pressure-compensated valve, so just can carry out pressure compensation automatically, the distribution of dependable flow and load difference are irrelevant.
Native system is compared with the system that manual multiple-way valve constitutes with the gear pump that development machine extensively adopts at present, have superior power adaptive functions, the power output of pump does not have power dissipation directly by the loading demand decision, has improved the reliability of system when saving the energy.Because native system is driven by plunger pump, and the output pressure ratio gear pump exceeds a lot, has improved power-weight ratio, and the proportion pilot handle makes driver's operation more comfortable, safety is moved also more accurate in addition.Be applied on the development machine, it is comfortable to make development machine have an operation, and control is precisely saved the energy, and outputting power is powerful, reduces oil liquid temperature, characteristics such as reliability height.
Description of drawings
Fig. 1 is that the hydraulic system parts are provided with schematic representation;
Embodiment
The design's development machine hydraulic system, comprise pump and pump stroking mechanism, multiple directional control valve and hydraulic actuator, see Fig. 1, it is characterized in that having the inlet port S mouth of the responsive shaft orientation plunger variable pump 2 of constant power load (being called for short variable displacement pump 2) of pressure cut off function, the drain tap T1 mouth of variable displacement pump 2 connects with fuel tank 1 by pipeline, variable displacement pump 2 pump stroking mechanism 3 outlets own directly are connected by the Ls mouths of pipeline with six logical type proportional multi-path reversing valves 4, the P1 mouth of six logical type proportional multi-path reversing valves 4 is connected by pipeline with the A mouth of variable displacement pump 2, the leakage hydraulic fluid port Y mouth of six logical proportional multi-path reversing valves 4 connects by pipeline and fuel tank 1, X mouth on the six logical type proportional multi-path reversing valves 4 links to each other with the P2 mouth pipeline of proportion pilot handle 7, the outlet T3 of fuel tank 1 connects guide's handle 7, two pressure-compensated valves 6 that are provided with in the six logical type proportional multi-path reversing valves 4 are connected on the in-line of plate valve separately, the liquid outlet a7 of guide's handle 7, b7, a8, b8 is connected with pipeline with the six plate valve hydraulic control mouth a7 ' b7 ' a8 ' b8 ' that lead in the type proportional multi-path reversing valves 4.A1, the B1 of six logical type proportional multi-path reversing valves 4, A2, B2 mouth are linked to each other by the connection mouth of pipeline with each hydraulic actuator 5 of needs control respectively, and the oil return inlet T 2 of six logical type proportional multi-path reversing valves 4 communicates with fuel tank 1 pipeline.Design needs in the pressure cut off value size of pump and the system Daheng power setting can realize that the pressure compensation value that each actuator 5 loop needs can be by adjusting pressure-compensated valve 6 realizations with the size of flow by adjusting screw and the pump stroking mechanism 3 of adjusting pressure-compensated valve 6 self.
The design's hydraulic system used unit can be ordered to factory by functional requirement.Above-mentioned variable displacement pump 2 requires to have the pressure cut off function, and when promptly the force value of pump reached the pressure cut off value of setting, the output flow of pump was zero, and it is constant that pressure is kept setting value.The realization of load sensing function is to realize by the variable valve group of proportional multi-path reversing valve and pump is common, proportional multi-path reversing valve connects the variable valve group of the load pressure signal value being passed to pump by pipeline, the pressure of pump variable valve group action control pump and flow output and load matched.
For example, when driver operation proportion pilot valve events, the openings of sizes of pilot valve has determined the size of delivery pressure, and then determined the flow of the plate valve of proportional multi-path pilot valve correspondence, the effect of pressure-compensated valve is to guarantee still to guarantee in load variations that the flow of plate valve is constant in the plate valve, the pressure of load end senses in the pump stroking mechanism by pipeline and proportional multi-path reversing valve, the pump stroking mechanism has so just been realized the power adaptive functions of system by with the comparison of setting value and then to adjust pressure consistent with flow output and load request.
Claims (1)
1, a kind of development machine hydraulic system, it is characterized in that the responsive shaft orientation plunger variable pump of constant power load that has the pressure cut off function connects with six logical type proportional multi-path reversing valves with pressure compensation and load sensing function, each plate valve in the six logical type proportional multi-path reversing valves connects each actuator respectively, in six logical type proportional multi-path reversing valves the relevant pressure recuperation valve being set is connected with each plate valve respectively, be used for adjusting the flow value of each plate valve, the pilot control opening of proportional multi-path valve links to each other with manual proportional pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720185083 CN201144902Y (en) | 2007-12-21 | 2007-12-21 | Hydraulic system for development machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720185083 CN201144902Y (en) | 2007-12-21 | 2007-12-21 | Hydraulic system for development machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201144902Y true CN201144902Y (en) | 2008-11-05 |
Family
ID=40081779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720185083 Expired - Fee Related CN201144902Y (en) | 2007-12-21 | 2007-12-21 | Hydraulic system for development machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201144902Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967981A (en) * | 2010-09-16 | 2011-02-09 | 沈阳矿山机械有限公司 | Copy cutting system of tunneling machine |
| CN102996138A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of dust removal and outburst prevention integrated heading machine |
| CN103216477A (en) * | 2013-04-28 | 2013-07-24 | 贵州大学 | Quantitative pump pressure compensation method and device of single-power hydraulic source |
| CN104235102A (en) * | 2014-09-04 | 2014-12-24 | 中联重科股份有限公司 | Getting-on hydraulic system and engineering machinery |
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
-
2007
- 2007-12-21 CN CN 200720185083 patent/CN201144902Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967981A (en) * | 2010-09-16 | 2011-02-09 | 沈阳矿山机械有限公司 | Copy cutting system of tunneling machine |
| CN102996138A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of dust removal and outburst prevention integrated heading machine |
| CN102996138B (en) * | 2012-11-30 | 2015-02-18 | 中煤科工集团重庆研究院有限公司 | Hydraulic control system integrating dust removal and outburst prevention for integrated excavator |
| CN103216477A (en) * | 2013-04-28 | 2013-07-24 | 贵州大学 | Quantitative pump pressure compensation method and device of single-power hydraulic source |
| CN103216477B (en) * | 2013-04-28 | 2016-03-16 | 贵州大学 | A kind of metering pump pressure compensating method of single-power hydraulic power and device |
| CN104235102A (en) * | 2014-09-04 | 2014-12-24 | 中联重科股份有限公司 | Getting-on hydraulic system and engineering machinery |
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20141221 |
|
| EXPY | Termination of patent right or utility model |