CN106609672A - Oil cylinder stepping type thin coal seam coal-mining machine traction part and hydraulic system - Google Patents
Oil cylinder stepping type thin coal seam coal-mining machine traction part and hydraulic system Download PDFInfo
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- CN106609672A CN106609672A CN201510694611.5A CN201510694611A CN106609672A CN 106609672 A CN106609672 A CN 106609672A CN 201510694611 A CN201510694611 A CN 201510694611A CN 106609672 A CN106609672 A CN 106609672A
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- 238000005065 mining Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 title abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims 4
- 238000013461 design Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 101100293604 Hordeum vulgare NAS7 gene Proteins 0.000 description 1
- 101100529043 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPN9 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an oil cylinder stepping type thin coal seam coal-mining machine traction part and hydraulic system; double-pump liquid supply is adopted; when a propulsion oil cylinder is in a noncutting stroke, an oil source is switched to low-pressure liquid supply through a reversing valve; when the propulsion oil cylinder is in a working condition, the oil source is switched to high-pressure liquid supply. The proportional control way is fully applied, the composite control of the pressure and the flow quantity is achieved, and the system design is simplified to the greatest extent. At the same time, a pressure gaining loop is ingenious to apply, local high pressure makes the overall performance of the system optimized, and the hydraulic system has stronger application promotion value than other hydraulic systems with similar functions.
Description
Technical field
The present invention relates to a kind of oil cylinder step type low seam mining machinery tractive unit and hydraulic system, it is adaptable to field of mining.
Background technology
China is rich in minerals, and as Mechanion develops, medium-thickness seam will be exploited totally, and girdle rich reserves, need exploitation badly.In order to adapt to the girdle that coal seam thickness is 0.85～1.4m, coal-winning machine will as far as possible reduce fuselage height.Bi-motor rocking arm is adopted low seam mining machinery to reduce fuselage height more, and easily improve fresh being documented with regard to running part at present.The running part of coal-winning machine is one of important component part of coal-winning machine, installed in the old man side of coal-face.Chainless haulage being adopted Walk Part of Shearer, its form is broadly divided into following 3 class more：（1）Driving wheel-rack system；（2）Driving-chain-toothed chain system；(3）Hydraulic cylinder propulsion system.
In traditional gear-pin row walking manner, reduce the walking gear number of teeth and modulus, although circumference of gear size can be reduced, but also result in strength of gear teeth deficiency, therefore, road wheel becomes the bottleneck for reducing fuselage height.Although hydraulic haulage is substituted already by electrical haulage, under this special working environment of girdle, hydraulic cylinder trailer system becomes the designs direction that low seam mining machinery draws running part the features such as simple structure, small volume.
The content of the invention
The present invention proposes a kind of oil cylinder step type low seam mining machinery tractive unit and hydraulic system, fully with ratio control mode, realizes the complex controll of pressure and flow, has at utmost simplified system design.Meanwhile, ingenious utilization boost-up circuit realizes that partial high pressure enables systematic entirety to be optimized, and has stronger application and popularization value to the hydraulic system of other similar functions.
The technical solution adopted in the present invention is：
The oil cylinder walking miner application hydraulic cylinder traction technique, using the principle of bio-robot, advance of creeping.Using 3 groups of walking mechanism alternations, to drive coal-winning machine to move.Traction running part is mainly made up of hydraulic power unit and walking mechanism.Hydraulic power unit provides power for coal-winning machine walking；The actuator that walking mechanism is walked as coal-winning machine, is made up of two group oil cylinders.During work, locking cylinder stretches out, and is directed to piston shoes and is fixed in pin rail, and propelling cylinder stretches out promotion coal-winning machine movement；During idle stroke, locking cylinder withdraws, and propelling cylinder withdraws, and prepares next time mobile.
The coal-winning machine is variable displacement with constant power pump from the hydraulic pump used by constant power load sensitivity volume-flow control circuit hydraulic system.In order to ensure the efficiency of system, using double pump feed flow, when propelling cylinder is in idle stroke, by reversal valve, oil sources is switched to into low pressure feed flow；When propelling cylinder is in running order, high pressure feed flow is switched to.This method not only contributes to energy distribution, and greatly improves the efficiency of system.The pressure oil of invariable power hydraulic pump output enters reversal valve, and oil cylinder, propelling cylinder, locking cylinder are heightened in driving；Pressure oil from reversal valve outflow flows back to fuel tank through radiator.
Described to heighten oil cylinder and locking cylinder import equipped with hydraulic lock, when its operation principle is an oil pocket forward direction oil-feed, another chamber is reversely fuel-displaced, and vice versa, reversely also obstructed when the forward direction not oil-feed of two chambers, is not disturbed by external load, plays a part of lock.
The operation principle of the oil cylinder walking miner is：Propelling hydraulic cylinder is horizontally disposed, and cylinder body is articulated with fuselage, and piston rod is articulated with guide slip shoe；Locked hydraulic cylinder is vertically arranged, if piston rod is inserted directly into pin rail, pull strength needed for walking is all added on locked hydraulic cylinder piston rod, causes piston rods bend.Therefore, piston rod is articulated with guide slip shoe, and cylinder body is put in guide slip shoe, and guide slip shoe limits 4 degree of freedom of cylinder body, can only axially-movable and around axial rotation, be arranged so as to pull strength can be transferred on guide slip shoe, so as to protect locked hydraulic cylinder.Locked hydraulic cylinder cylinder body upwards (under）It is mobile, locking（Unblock）Guide slip shoe, so as to reach the purpose of walking.
The invention has the beneficial effects as follows：Ratio control mode is fully used, the complex controll of pressure and flow is realized, system design has at utmost been simplified.Meanwhile, ingenious utilization boost-up circuit realizes that partial high pressure enables systematic entirety to be optimized, and has stronger application and popularization value to the hydraulic system of other similar functions.
Description of the drawings
With reference to the accompanying drawings and examples the present invention is further described.
Fig. 1 is the oil cylinder step type low seam mining machinery hydraulic schematic diagram of the present invention.
Fig. 2 is 3 groups of walking mechanism action schematic diagrams of the present invention.
In figure：1. cooler；2. oil cylinder is heightened；3. hydraulic lock；4. three position four-way directional control valve；5. 2/2-way reversal valve；6. propelling cylinder；7. locking cylinder；8. variable pump；9. fine filter；10. overflow valve；11. dosing pumps；12. coarse filters.
Specific embodiment
With reference to the accompanying drawings and examples the invention will be further described.
Such as Fig. 1, oil cylinder walking miner application hydraulic cylinder traction technique, using the principle of bio-robot, advance of creeping.Using 3 groups of walking mechanism alternations, to drive coal-winning machine to move.Traction running part is mainly made up of hydraulic power unit and walking mechanism.Hydraulic power unit provides power for coal-winning machine walking；The actuator that walking mechanism is walked as coal-winning machine, is made up of two group oil cylinders.During work, locking cylinder stretches out, and is directed to piston shoes and is fixed in pin rail, and propelling cylinder stretches out promotion coal-winning machine movement；During idle stroke, locking cylinder withdraws, and propelling cylinder withdraws, and prepares next time mobile.
Coal-winning machine is variable displacement with constant power pump from the hydraulic pump used by constant power load sensitivity volume-flow control circuit hydraulic system.In order to ensure the efficiency of system, using double pump feed flow, when propelling cylinder is in idle stroke, by reversal valve, oil sources is switched to into low pressure feed flow；When propelling cylinder is in running order, high pressure feed flow is switched to.This method not only contributes to energy distribution, and greatly improves the efficiency of system.The pressure oil of invariable power hydraulic pump output enters reversal valve, and oil cylinder, propelling cylinder, locking cylinder are heightened in driving；Pressure oil from reversal valve outflow flows back to fuel tank through radiator.
Oil cylinder and locking cylinder import are heightened equipped with hydraulic lock, when its operation principle is an oil pocket forward direction oil-feed, another chamber is reversely fuel-displaced, and vice versa, it is reversely also obstructed when the forward direction not oil-feed of two chambers, do not disturbed by external load, play a part of lock.
Such as Fig. 2, the operation principle of oil cylinder walking miner is：Propelling hydraulic cylinder is horizontally disposed, and cylinder body is articulated with fuselage, and piston rod is articulated with guide slip shoe；Locked hydraulic cylinder is vertically arranged, if piston rod is inserted directly into pin rail, pull strength needed for walking is all added on locked hydraulic cylinder piston rod, causes piston rods bend.Therefore, piston rod is articulated with guide slip shoe, and cylinder body is put in guide slip shoe, and guide slip shoe limits 4 degree of freedom of cylinder body, can only axially-movable and around axial rotation, be arranged so as to pull strength can be transferred on guide slip shoe, so as to protect locked hydraulic cylinder.Locked hydraulic cylinder cylinder body upwards (under）It is mobile, locking（Unblock）Guide slip shoe, so as to reach the purpose of walking.
Coal-winning machine fuselage moves right to the left 6 sequence of motions of 3 walking mechanisms, is circulated with this.Three groups of walking mechanisms represent that successively the mark-hold behind propelling cylinder piston rod represents that locking cylinder works, and then fixed guide piston shoes with walking mechanism I, walking mechanism II and walking mechanism III.The coal-winning machine adopts oil cylinder step type walking manner, 3 groups of two groups of walking mechanisms to be arranged in fuselage outer side, and one group is arranged in inboard, and alternation makes coal-winning machine steadily to walk during coal petrography cutting；Fire-proof motor drives variable pump operating, and high pressure liquid force feed is sent in oil cylinder, and reversal valve realizes the commutation of hydraulic cylinder.When propelling cylinder works, system pressure is higher, using high-pressure pump feed flow；When propelling cylinder backhaul, using low-lift pump feed flow, the efficiency of hydraulic power unit can be effectively improved, it is to avoid energy loss.Single walking mechanism workflow：By taking walking mechanism I as an example, during work, locking cylinder stretches out, and drives the horizontal movement of wedge II, and under the extruding of wedge II, wedge I is moved downward, in the pin rail of the bottom insertion drag conveyor of wedge I, with fixed guide piston shoes, propulsion.When hydraulic cylinder is reached up to extreme position, the pressure of hydraulic cylinder rodless cavity pipeline can raise and be finally reached pump output pressure, now pressure switch 11-1 triggerings, electro-hydraulic proportion reversing valve 20 commutates, hydraulic cylinder is retracted, and when hydraulic cylinder is retracted to extreme position, the pressure of hydraulic cylinder rod chamber pipeline can raise and be finally reached pump output pressure, now pressure switch 11-2 triggerings, electro-hydraulic proportion reversing valve 20 commutates.So repeatedly, just it is capable of achieving do action.The number of do action can easily set from the control panel of guidance panel.Next to that time control pattern.In such a mode, hydraulic cylinder stretches out or the movement time retracted is controlled by PLC, and after reaching the time, electro-hydraulic proportion reversing valve 20 commutates, and is equally capable of achieving do action.Time parameter is equally easily set by the control panel of guidance panel.The movement velocity of test hydraulic cylinder should be adjusted in time according to the concrete size of cylinder, be adjusted by changing the given realizing of electro-hydraulic proportion reversing valve 20.The control of system clean degree.The cleannes grade of Control experiment hydraulic cylinder is the major function of the testing machine.For this purpose, the hydraulic system is provided with multi-filter.For example, the individually designed circulating filtration loop of hydraulic system, is made up of circulating pump 2, cooler 31, heater 3, filter 38, can effective control oil temperature and system clean degree, circulating filtration precision is 5 μm.Simultaneity factor is provided with return filter 18, and filtering accuracy is 10 μm.For prevent test hydraulic cylinder in mechanical admixture Hydraulic Elements are caused damage into system, be provided with test cylinder (jar) scavenger circuit can be bi-directional filtered high pressure filter 42, filtering accuracy be 10 μm.By these filters, fact proved, effective control system clean degree, after the wash cycles 30 times, cleannes have basically reached NAS7 levels to test hydraulic cylinder.
Pressure test is the key function of the testing machine.Partial high pressure function can be conveniently realized using supercharger, the pressure rating requirement to hydraulic pressure main pump is reduced, Series Industrial hydraulic pump is pressed in can flexibly selecting, reduce system cost and manufacture difficulty.Its hydraulic circuit is mainly made up of the conversion valve of proportional pressure-reducing valve 6, reversal valve 9, supercharger 12, pressure transmitter 13 and correlation.The pressure ratio of supercharger is 32, and the control supercharger of solenoid directional control valve 9 is in pressurized state or depressurization phase.The control of proportional pressure-reducing valve 6 enters the input oil pressure of supercharger, so as to control its highest output pressure.The given of proportional pressure-reducing valve 6 can set in operating board.Pressure transmitter 13 shows in real time the output oil pressure of supercharger and is displayed on guidance panel.Programmed by PLC, various stress test functions can be conveniently realized.
Claims (6)
1. a kind of oil cylinder step type low seam mining machinery tractive unit and hydraulic system, is characterized in that：The oil cylinder walking miner application hydraulic cylinder traction technique, using the principle of bio-robot, advance of creeping, using 3 groups of walking mechanism alternations, to drive coal-winning machine to move.
2. a kind of oil cylinder step type low seam mining machinery tractive unit according to claim 1 and hydraulic system, is characterized in that：The traction running part is mainly made up of hydraulic power unit and walking mechanism, and hydraulic power unit provides power for coal-winning machine walking；The actuator that walking mechanism is walked as coal-winning machine, is made up of two group oil cylinders.
3. a kind of oil cylinder step type low seam mining machinery tractive unit according to claim 1 and hydraulic system, is characterized in that：The coal-winning machine is variable displacement with constant power pump from the hydraulic pump used by constant power load sensitivity volume-flow control circuit hydraulic system, in order to ensure the efficiency of system, using double pump feed flow, when propelling cylinder is in idle stroke, by reversal valve, oil sources is switched to into low pressure feed flow；When propelling cylinder is in running order, high pressure feed flow is switched to.
4. a kind of oil cylinder step type low seam mining machinery tractive unit according to claim 1 and hydraulic system, is characterized in that：The deformable spherical shell is made up of elastomeric material, flat spoke-like elastomeric material two ends are fixed on into plectane one week with uniform spacing, the flexural deformation of elastomeric material is realizing by the stretching of electric pushrod, the plectane relative position at connection elastomeric material two ends is changed, the geometry for so causing the shell of robot changes, and the change of robot motion's mode is realized with this.
5. a kind of oil cylinder step type low seam mining machinery tractive unit according to claim 1 and hydraulic system, is characterized in that：Described to heighten oil cylinder and locking cylinder import equipped with hydraulic lock, when its operation principle is an oil pocket forward direction oil-feed, another chamber is reversely fuel-displaced, and vice versa, reversely also obstructed when the forward direction not oil-feed of two chambers, is not disturbed by external load, plays a part of lock.
6. a kind of oil cylinder step type low seam mining machinery tractive unit according to claim 1 and hydraulic system, is characterized in that：The operation principle of the oil cylinder walking miner is：Propelling hydraulic cylinder is horizontally disposed, and cylinder body is articulated with fuselage, and piston rod is articulated with guide slip shoe；Locked hydraulic cylinder is vertically arranged, if piston rod is inserted directly into pin rail, pull strength needed for walking is all added on locked hydraulic cylinder piston rod, causes piston rods bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694611.5A CN106609672A (en) | 2015-10-21 | 2015-10-21 | Oil cylinder stepping type thin coal seam coal-mining machine traction part and hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510694611.5A CN106609672A (en) | 2015-10-21 | 2015-10-21 | Oil cylinder stepping type thin coal seam coal-mining machine traction part and hydraulic system |
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| CN106609672A true CN106609672A (en) | 2017-05-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225455A (en) * | 2018-08-07 | 2019-01-18 | 江苏大学 | A kind of high working face coal winning machine coal wall side crushing device |
| CN110332164A (en) * | 2019-08-12 | 2019-10-15 | 吉林大学 | Six sufficient hydraulic systems |
| CN111608655A (en) * | 2020-05-22 | 2020-09-01 | 张世利 | Hydraulic drive thin coal seam coal mining machine |
| CN112922594A (en) * | 2021-02-01 | 2021-06-08 | 重庆工程职业技术学院 | Mining robot under complicated operating mode |
-
2015
- 2015-10-21 CN CN201510694611.5A patent/CN106609672A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225455A (en) * | 2018-08-07 | 2019-01-18 | 江苏大学 | A kind of high working face coal winning machine coal wall side crushing device |
| CN110332164A (en) * | 2019-08-12 | 2019-10-15 | 吉林大学 | Six sufficient hydraulic systems |
| CN111608655A (en) * | 2020-05-22 | 2020-09-01 | 张世利 | Hydraulic drive thin coal seam coal mining machine |
| CN112922594A (en) * | 2021-02-01 | 2021-06-08 | 重庆工程职业技术学院 | Mining robot under complicated operating mode |
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Application publication date: 20170503 |
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