CN201982092U - Height-adjusting hydraulic system of electric traction coal winning machine - Google Patents

Height-adjusting hydraulic system of electric traction coal winning machine Download PDF

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Publication number
CN201982092U
CN201982092U CN2011200459620U CN201120045962U CN201982092U CN 201982092 U CN201982092 U CN 201982092U CN 2011200459620 U CN2011200459620 U CN 2011200459620U CN 201120045962 U CN201120045962 U CN 201120045962U CN 201982092 U CN201982092 U CN 201982092U
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China
Prior art keywords
hydraulic
pressure
oil
pump
banked
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Expired - Fee Related
Application number
CN2011200459620U
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Chinese (zh)
Inventor
刘文东
张锋
王振德
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Sany Heavy Equipment Co Ltd
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Sany Heavy Equipment Co Ltd
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Priority to CN2011200459620U priority Critical patent/CN201982092U/en
Application granted granted Critical
Publication of CN201982092U publication Critical patent/CN201982092U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model relates to the field of a coal winning machine, in particular to a height-adjusting hydraulic system of an electric traction coal winning machine, which solves problems in the prior art of being high in system heat productivity, quick in oil pollution and the like. A height-adjusting pump of the hydraulic system is a variable pump with a hydraulic open circuit. A pressure oil opening of the height-adjusting pump is connected with a pressure oil opening of a multi-way valve through a pipeline. An oil return opening of the multi-way valve is connected with an oil return line which is provided with a cooler, and a cooling mode is a water cooling. The hydraulic system comprises an oil absorption filter, a high pressure filter and an oil return filter, a filtering accuracy comprises a rough level, a middle level and a refined level. The height-adjusting hydraulic system of the electric traction coal winning machine can change pressure of the hydraulic system and an output volume of a pump according to a loading requirement, the hydraulic system can compulsively cool the hydraulic oil and the multistage filtration can be conducted on the coal winning machine hydraulic system.

Description

The electrical haulage shearer height-regulating hydraulic system
Technical field
The utility model relates to the coal-winning machine field, is specially a kind of electrical haulage shearer height-regulating hydraulic system.
Background technology
Early the coal-winning machine height-regulating hydraulic system generally all adopts quantitative gear pump, uses overflow valve to regulate and controlled hydraulic system pressure.Simultaneously, no forced cooling device, such control makes hydraulic system power loss big, often occur the oil temperature too high, heighten fault such as pump damage.
And how existing coal-winning machine height-regulating hydraulic system forms the load-sensitive hydraulic system with quantitative gear pump and banked direction control valves, though changed the control mode of former overflow valve pressure regulation, also reduced the calorific value of system, but because pumpage can't change, under the idle situation of height-adjusting system, all fluid through the banked direction control valves oil sump tank, also often occur the high phenomenon of system's calorific value with the set solid amount.
And for hydraulic pressure oil filtration aspect, homemade coal-winning machine seldom is provided with the smart filtration of oil return, the smart filtration of oil suction coarse filtration and high pressure generally all is set, like this hydraulic oil through element work such as valve after direct oil sump tank, will together enter fuel tank together with oil return owing to the pollutant of valve or valve piece and pipeline or other element internals during this time, cause the pollution of fluid.
The technical problem that exists in the prior art is as follows:
1) constant displacement pump is used, and no matter whether system works to be, pump set solid amount work always, and power loss is big, system's calorific value height;
2) no cooler can't carry out mandatory cooling to fluid, circulation successively, and system temperature will raise gradually;
3) no return filter can't filter clean and direct oil sump tank through the fluid after each element work, quickening oil contamination, the coefficient of the increasing system failure.
The utility model content
Problems such as the purpose of this utility model is to provide a kind of electrical haulage shearer height-regulating hydraulic system, and system's calorific value height, the oil contamination that exists in the solution prior art is fast.
The technical solution of the utility model is:
A kind of electrical haulage shearer height-regulating hydraulic system has the pump of heightening and banked direction control valves, this hydraulic system heighten the variable pump that pump is the hydraulic pressure open circuit, the pressure hydraulic fluid port of heightening pump connects the pressure hydraulic fluid port of banked direction control valves by pipeline.
Described electrical haulage shearer height-regulating hydraulic system, the oil return opening of banked direction control valves connects return line, on this return line cooler is set, and its methods for cooling is a water-cooled.
Described electrical haulage shearer height-regulating hydraulic system, variable pump are plunger variable pump.
Described electrical haulage shearer height-regulating hydraulic system, banked direction control valves are the moving ratio form banked direction control valves of electric hand, and its control mode is electronic or manual two kinds of commutation control modes.
Described electrical haulage shearer height-regulating hydraulic system, this hydraulic system is provided with oil suction strainer, high pressure filter, return filter, and the inlet port of heightening pump connects the oil suction strainer, and the oil suction strainer inserts fuel tank; The pressure hydraulic fluid port of heightening pump connects the high pressure filter import, the high pressure filter outlet connects the pressure hydraulic fluid port of banked direction control valves, the actuator port of banked direction control valves connects the oil-feed outlet of equalizing valve group, two oil inlet and outlets in addition of equalizing valve group connect oil cylinder, the oil return opening of banked direction control valves connects the oil-in of cooler, the oil-out of cooler connects the oil-in of return filter, return filter inserts fuel tank, the pressure feedback mouth of heightening pump connects the pressure feedback mouth of banked direction control valves, and the drain tap of heightening pump directly connects fuel tank.
Described electrical haulage shearer height-regulating hydraulic system, oil suction strainer, high pressure filter, its filtering accuracy of return filter be respectively slightly, in, essence.
Described electrical haulage shearer height-regulating hydraulic system, the filtering accuracy of oil suction strainer, high pressure filter, return filter are respectively 80-100 μ m, 10-30 μ m, 1-5 μ m.
Described electrical haulage shearer height-regulating hydraulic system, control and the variable mode of heightening pump are pressure and flow-control.
Described electrical haulage shearer height-regulating hydraulic system, variable pump control and variable mode are pressure, flow, power control or pressure, flow, general power control.
Advantage of the present utility model is as follows:
1) to heighten pump be plunger variable pump to the utility model, and working method is an open type, and control and variable device are pressure and flow-control.The application of variable pump has changed the composition mode of original electrical haulage shearer height-regulating hydraulic system, according to the pressure and the pump delivery of load needs change hydraulic system, has lowered system power loss and calorific value.
2) the utility model oil return is provided with cooler, and the type of cooling is a water-cooled, and hydraulic oil is cooled off, and reduces the oil temperature.
3) the utility model is provided with oil suction, high pressure, return filter, to hydraulic oil carry out slightly, in, smart three-stage filtration, improve the hydraulic system oil liquid cleannes greatly, reduce the hydraulic system fault that causes because of oil contamination.
In a word, the utility model can change the pressure and the pump delivery of hydraulic system according to the load needs, and hydraulic system can be carried out compulsory cooling to hydraulic oil, and coal-mining machine hydraulic system is carried out multistage filtering.
Description of drawings
Fig. 1 is the utility model electrical haulage shearer height-regulating hydraulic system schematic diagram.
Among the figure, 1 fuel tank; 2 oil suction strainers; 3 heighten pump; 4 high pressure filters; 5 banked direction control valves; 6 equalizing valve groups; 7 oil cylinders; 8 coolers; 9 return filters.
The specific embodiment
The utility model electrical haulage shearer height-regulating hydraulic system has the pump of heightening and banked direction control valves, this hydraulic system heighten the variable pump that pump is the hydraulic pressure open circuit, the pressure hydraulic fluid port of heightening pump connects the pressure hydraulic fluid port of banked direction control valves by pipeline; The oil return opening of banked direction control valves connects return line, on this return line cooler is set.
As shown in Figure 1, the utility model electrical haulage shearer height-regulating hydraulic system mainly comprises: fuel tank 1, oil suction strainer 2, heighten pump 3, high pressure filter 4, banked direction control valves 5, equalizing valve group 6, oil cylinder 7, cooler 8, return filter 9 etc., wherein: the inlet port of heightening pump 3 connects oil suction strainer 2, and oil suction strainer 2 inserts fuel tank; The pressure hydraulic fluid port of heightening pump 3 connects high pressure filter 4 imports, high pressure filter 4 outlets connect the pressure hydraulic fluid port of banked direction control valves 5, the actuator port of banked direction control valves 5 connects the oil-feed outlet of equalizing valve group 6, two oil inlet and outlets in addition of equalizing valve group 6 connect oil cylinder 7, the oil return opening of banked direction control valves 5 connects the oil-in of cooler 8, the oil-out of cooler 8 connects the oil-in of return filter 9, return filter 9 inserts fuel tank 1, the pressure feedback mouth of heightening pump 3 connects the pressure feedback mouth of banked direction control valves 5, and the drain tap of heightening pump 3 directly connects fuel tank 1.
In the utility model, heighten pump 3 for the variable pump of hydraulic pressure open circuit, be preferably plunger variable pump, working method is an open type, and control and variable mode are pressure and flow-control.
In the utility model, banked direction control valves 5 is the moving ratio form banked direction control valves of electric hand, can realize electronic and manual two kinds of commutation control modes.
In the utility model, the methods for cooling of cooler 8 is a water-cooled.
In the utility model, the filtering accuracy of oil suction strainer 2, high pressure filter 4, return filter 9 is respectively 80-100 μ m, 10-30 μ m, 1-5 μ m.
The course of work of the present utility model is as follows:
When the needs rocker arm of coal mining machine need be heightened or reduce, heighten pump 3 from fuel tank 1 oil suction, the hydraulic oil of sucking-off enters after 2 coarse filtrations of oil suction strainer and heightens pump 3.Heighten the hydraulic oil that pump 3 gets and after filtering in the high pressure filter 4, enter banked direction control valves 5.Automatically controlled or manually allow banked direction control valves 5 commutation, the fluid that banked direction control valves 5 is got enters the working chamber of oil cylinder 7 through equalizing valve group 6.Meanwhile, in the course of the work, the feedback port of load pressure process banked direction control valves 5 feeds back to heightens pump 3, and the swash plate of heightening pump 3 according to feedback signal changes to certain angle automatically, satisfies the flow and the pressure of system's needs, realizes the flexible of oil cylinder 7.System oil return is got back in the fuel tank 1 through the cooling of cooler 8 and the essence filtration of return filter 9 through equalizing valve 6, banked direction control valves 5 again.
Do not needing coal-winning machine to heighten or when reducing, owing to do not have load or load minimum, no feedback signal feeds back to from banked direction control valves 5 heightens pump 3, and the swash plate angle of heightening pump is zero substantially.Plunger displacement pump swash plate angle is zero and no flow is discharged from heightening pump, heightens pump 3 and is in idling conditions.
In addition, in the utility model, plunger variable pump control and variable mode can be pressure, flow, power control or pressure, flow, general power control.

Claims (9)

1. an electrical haulage shearer height-regulating hydraulic system has the pump of heightening and banked direction control valves, it is characterized in that: this hydraulic system heighten the variable pump that pump is the hydraulic pressure open circuit, the pressure hydraulic fluid port of heightening pump connects the pressure hydraulic fluid port of banked direction control valves by pipeline.
2. according to the described electrical haulage shearer height-regulating hydraulic system of claim 1, it is characterized in that: the oil return opening of banked direction control valves connects return line, on this return line cooler is set, and its methods for cooling is a water-cooled.
3. according to the described electrical haulage shearer height-regulating hydraulic system of claim 1, it is characterized in that: variable pump is a plunger variable pump.
4. according to the described electrical haulage shearer height-regulating hydraulic system of claim 1, it is characterized in that: banked direction control valves is the moving ratio form banked direction control valves of electric hand, and its control mode is electronic or manual two kinds of commutation control modes.
5. according to the described electrical haulage shearer height-regulating hydraulic system of claim 1, it is characterized in that: this hydraulic system is provided with oil suction strainer, high pressure filter, return filter, and the inlet port of heightening pump connects the oil suction strainer, and the oil suction strainer inserts fuel tank; The pressure hydraulic fluid port of heightening pump connects the high pressure filter import, the high pressure filter outlet connects the pressure hydraulic fluid port of banked direction control valves, the actuator port of banked direction control valves connects the oil-feed outlet of equalizing valve group, two oil inlet and outlets in addition of equalizing valve group connect oil cylinder, the oil return opening of banked direction control valves connects the oil-in of cooler, the oil-out of cooler connects the oil-in of return filter, return filter inserts fuel tank, the pressure feedback mouth of heightening pump connects the pressure feedback mouth of banked direction control valves, and the drain tap of heightening pump directly connects fuel tank.
6. according to the described electrical haulage shearer height-regulating hydraulic system of claim 5, it is characterized in that: oil suction strainer, high pressure filter, its filtering accuracy of return filter be respectively slightly, in, essence.
7. according to the described electrical haulage shearer height-regulating hydraulic system of claim 6, it is characterized in that: the filtering accuracy of oil suction strainer, high pressure filter, return filter is respectively 80-100 μ m, 10-30 μ m, 1-5 μ m.
8. according to claim 1 or 5 described electrical haulage shearer height-regulating hydraulic system, it is characterized in that: control and the variable mode of heightening pump are pressure and flow-control.
9. according to claim 1 or 3 described electrical haulage shearer height-regulating hydraulic system, it is characterized in that: variable pump control and variable mode are pressure, flow, power control or pressure, flow, general power control.
CN2011200459620U 2011-02-24 2011-02-24 Height-adjusting hydraulic system of electric traction coal winning machine Expired - Fee Related CN201982092U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200459620U CN201982092U (en) 2011-02-24 2011-02-24 Height-adjusting hydraulic system of electric traction coal winning machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200459620U CN201982092U (en) 2011-02-24 2011-02-24 Height-adjusting hydraulic system of electric traction coal winning machine

Publications (1)

Publication Number Publication Date
CN201982092U true CN201982092U (en) 2011-09-21

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400981A (en) * 2011-11-30 2012-04-04 北京二七轨道交通装备有限责任公司 Equipment for cleaning hydraulic system
CN103541942A (en) * 2013-10-29 2014-01-29 天地上海采掘装备科技有限公司 Two-way control valve applicable to rising system of shortwall coal cutter
CN103867509A (en) * 2014-03-26 2014-06-18 上海电气液压气动有限公司 Hydraulic power system of double-wheel mill
CN104879349A (en) * 2015-04-13 2015-09-02 徐州重型机械有限公司 Hydraulic system for energy recovery and utilization and engineering machinery vehicle
CN105134578A (en) * 2015-07-30 2015-12-09 徐州重型机械有限公司 Plunger pump with energy recycling function
CN106438553A (en) * 2016-09-17 2017-02-22 北京电力设备总厂有限公司 Novel hydraulic loading system for coal mill

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400981A (en) * 2011-11-30 2012-04-04 北京二七轨道交通装备有限责任公司 Equipment for cleaning hydraulic system
CN103541942A (en) * 2013-10-29 2014-01-29 天地上海采掘装备科技有限公司 Two-way control valve applicable to rising system of shortwall coal cutter
CN103541942B (en) * 2013-10-29 2016-04-20 天地上海采掘装备科技有限公司 Be applicable to the bidirectional control valve of short-wall coal-winning machine height-adjusting system
CN103867509A (en) * 2014-03-26 2014-06-18 上海电气液压气动有限公司 Hydraulic power system of double-wheel mill
CN103867509B (en) * 2014-03-26 2016-06-22 上海电气液压气动有限公司 A kind of Double-wheel milling hydraulic power system
CN104879349A (en) * 2015-04-13 2015-09-02 徐州重型机械有限公司 Hydraulic system for energy recovery and utilization and engineering machinery vehicle
CN104879349B (en) * 2015-04-13 2017-03-29 徐州重型机械有限公司 For energy regenerating and the hydraulic system for utilizing and engineering machinery vehicle
CN105134578A (en) * 2015-07-30 2015-12-09 徐州重型机械有限公司 Plunger pump with energy recycling function
CN106438553A (en) * 2016-09-17 2017-02-22 北京电力设备总厂有限公司 Novel hydraulic loading system for coal mill

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110921

Termination date: 20160224