CN205022676U - Variable hydraulic system of underground mine -car - Google Patents
Variable hydraulic system of underground mine -car Download PDFInfo
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- CN205022676U CN205022676U CN201520606077.3U CN201520606077U CN205022676U CN 205022676 U CN205022676 U CN 205022676U CN 201520606077 U CN201520606077 U CN 201520606077U CN 205022676 U CN205022676 U CN 205022676U
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Abstract
The utility model aims at providing a reduce the energy consumption, have very fast function, dependable performance, the high variable hydraulic system of underground mine -car of security of promptly turning to, include load sensitivity variable pump, shuttle valve, turn to module, braking energy storage ware, emergent energy storage ware, the prefill valve of turning to, adopt load sensitivity variable pump, can be according to load needs regulating variable pump delivery, the power waste of lowering system and the temperature rise of hydraulic oil, having add prefill valve, braking energy storage ware and emergency and having turned to the energy storage ware, when the brake pump broke down, two energy storage wares had prolonged the fuel feeding time all to the braking system fuel feeding, have reduced the topping up number of times, have prolonged the life of brake pump and prefill valve, when variable pump trouble, the emergency turns to the energy storage ware to the steering gear fuel feeding to realize promptly turning to fast, need not independent configuration, with the most economically, the simplest mode has realized very fast promptly turning to, has reduced the complexity and the cost of system, has improved the reliability and the security of system.
Description
Technical field
The utility model relates to a kind of hydraulic efficiency pressure system, particularly relates to the variable delivery hydraulic system of a kind of underground mine truck.
Background technology
That applies in mining along with underground mine truck popularizes, and client, to economical, traveling comfort, the safety and reliability of mine truck, has higher requirement.The hydraulic efficiency pressure system of underground mine truck comprises all-hydraulic power steering system, hydraulic lifting system, full power hydraulic brake system; Little tonnage mine truck mainly adopts the hydraulic efficiency pressure system of pressure-gradient control valve+deflector, and large-tonnage mine truck adopts the hydraulic efficiency pressure system of deflector+flow amplifier.At present, the hydraulic efficiency pressure system of underground mine truck can be divided into quantitative system and variable system, and domestic manufacturer mainly adopts the quantitative system based on gear type pump, and external producer, for large-tonnage equipment, brings into use the variable delivery hydraulic system of load sensitive pump.
Due to underground mine bad environments, maintaining and operator quality lower, more easily there is the faults such as holddown in variable system, cause vehicle in stays, take tunnel, affect the normal operation of other vehicles, have a strong impact on production efficiency, external producer generally increases the emergency turn pump group that Direct Current Motor drives.Because Direct Current Motor power is less, thus meet an urgent need and turn to capacity of pump to be no more than 6mL/r, turning velocity is very slow, and cannot carrying is with for a long time to turn.
At present, underground mine truck mainly adopts fixed dilivery hydraulic system, and as shown in Figure 1, existing fixed dilivery hydraulic system is made up of parts such as steering pump 1a, pressure-gradient control valve 2a, check valve 3a, deflector 4a.For realizing preferentially turning to, improve steering sensitivity, the controlling spring pressure of pressure-gradient control valve 1a must be greater than 7bar, and namely during system attonity, the pressure of pressure-gradient control valve P mouth is greater than 7bar, is greater than 10bar during the full rotating speed of driving engine.
According to professional standard, underground mine truck the fastest time to turn can not more than 6s (from left-limit to limit on the right-right-hand limit).In operation process, there is the descending operating mode of long distance in underground mine truck.In order to ensure that driving engine is when lower-speed state, can quick steering, enhance productivity, be generally no more than 1000rpm by engine speed and select steering pump, its discharge capacity is larger.But when high engine speeds, there is a large amount of loss in efficiencyes, cause hydraulic oil to heat up serious.For 12t underground mine truck, about there is the idle loop loss in efficiency of 2kw.
Utility model content
The technical problems to be solved in the utility model be to provide a kind ofly reduce energy consumption, there is emergency turn function faster, the variable delivery hydraulic system of underground mine truck that dependable performance, safety are high.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The variable delivery hydraulic system of a kind of underground mine truck, comprise the first steering cylinder, second steering cylinder, brake pump, fuel tank, wherein also comprise steering module, load-reacting pump, shuttle valve, brake accumulator, meet an urgent need and turn to energy storage, prefill valve, the S mouth of load-reacting pump communicates with fuel tank, B mouth is communicated with the oil inlet of steering module, the L mouth of load-reacting pump is communicated with fuel tank through unloading line, first working hole of steering module respectively with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder is communicated with, second working hole of steering module respectively with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder is communicated with, 3rd working hole of steering module is communicated with the oil inlet P of work system, the return opening of steering module, the oil return inlet T of work system is communicated with fuel tank through oil return line respectively, the LS mouth of steering module is communicated with the A1 mouth of shuttle valve, the LS mouth of work system is communicated with the A2 mouth of shuttle valve, the A3 mouth of shuttle valve is communicated with the X mouth of load-reacting pump, the import of brake pump communicates with fuel tank, outlet is communicated with the oil inlet P of prefill valve, the oil return inlet T 1 of prefill valve, T2 is communicated with oil return line respectively, the working hole A of prefill valve is communicated with brake system through the 3rd check valve, meet an urgent need in parallel with on the pipeline between the 3rd check valve of the working hole A of prefill valve turns to energy storage, brake accumulator in parallel on 3rd pipeline between check valve with brake system, meeting an urgent need turns to energy storage to be communicated with the oil inlet of steering module through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet of steering module.
The variable delivery hydraulic system of the utility model underground mine truck, further, described steering module comprises deflector and flow amplifier, the P mouth of flow amplifier, working hole L, working hole R, oil return inlet T respectively with the oil inlet P of deflector, working hole L, working hole R, oil return inlet T is communicated with, the PP mouth of flow amplifier is communicated with the oil inlet P of deflector, the B mouth of load-reacting pump is communicated with the oil inlet HP of flow amplifier, first working hole CL of flow amplifier respectively with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder is communicated with, second working hole CR of flow amplifier respectively with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder is communicated with, 3rd working hole EF of flow amplifier is communicated with the oil inlet P of work system, the return opening HT of flow amplifier is communicated with fuel tank through oil return line, the LS mouth of deflector respectively with the LS mouth of flow amplifier, the A1 mouth of shuttle valve is communicated with, meeting an urgent need turns to energy storage to be communicated with the oil inlet HP of flow amplifier through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet HP of flow amplifier.
The variable delivery hydraulic system of the utility model underground mine truck, further, described steering module comprises pressure-gradient control valve and deflector, the B mouth of load-reacting pump is communicated with the oil inlet P of pressure-gradient control valve, the working hole CF of pressure-gradient control valve is communicated with the oil inlet P of deflector, 3rd working hole EF of pressure-gradient control valve is communicated with the oil inlet P of work system, the oil return inlet T of pressure-gradient control valve is communicated with fuel tank, first working hole L of deflector respectively with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder is communicated with, second working hole R of deflector respectively with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder is communicated with, the oil return inlet T of deflector is communicated with fuel tank through oil return line, the LS mouth of deflector respectively with the LS mouth of pressure-gradient control valve, the A1 mouth of shuttle valve is communicated with, meeting an urgent need turns to energy storage to be communicated with the oil inlet P of pressure-gradient control valve through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet P of pressure-gradient control valve.
The variable delivery hydraulic system of the utility model underground mine truck, further, described braking delivery side of pump and electromagnetic relief valve in parallel on the oil pipe between prefill valve oil inlet P, the oil return inlet T of electromagnetic relief valve communicates with fuel tank.
The variable delivery hydraulic system of the utility model underground mine truck, further, the X mouth of described load-reacting pump is communicated with drain line through electromagnetic valve.
The variable delivery hydraulic system of the utility model underground mine truck, further, described braking delivery side of pump is communicated with the oil inlet P of prefill valve through the second check valve.
The variable delivery hydraulic system of the utility model underground mine truck, further, emergency pump set in parallel between the import of described brake pump and the outlet of the second check valve, the 4th check valve is installed in the exit of emergency pump set.
The variable delivery hydraulic system of the utility model underground mine truck, preferably, described valve adopts two-way stop electromagnetic valve.
The variable delivery hydraulic system of the utility model underground mine truck, preferably, described valve adopts the check valve and unidirectional stop valve that are connected in series.
The variable delivery hydraulic system of the utility model underground mine truck, further, B mouth place's installation first check valve of described load-reacting pump.
The variable delivery hydraulic system of the utility model underground mine truck, adopt load-reacting pump, the load pressure signal of deflector and work system is obtained by shuttle valve, thus feed back to load-reacting pump, regulated variable capacity of pump can be needed according to load, reduce the power dissipation of system and the temperature rise of hydraulic oil; Set up prefill valve, brake accumulator and met an urgent need and turn to energy storage, when mine truck normally travels, brake accumulator turns to energy storage to be brake system stored energy with emergent, when brake pump breaks down, brake accumulator turns to energy storage all to brake system fuel feeding with emergent, increases the volume of brake accumulator, extends supply time, decrease topping up number of times, thus extend the service life of brake pump and prefill valve; When negative pressure sensitive variable failure of pump, meeting an urgent need turns to energy storage to deflector fuel feeding, the pressure oil of more than 50L/min still can be provided, thus realize urgent quick steering, without the need to independent configuration, achieve emergency turn faster with most economical, the simplest mode, reduce complexity and the cost of system, improve the reliability and security of system; And the 3rd check valve was set before brake accumulator, make emergent to turn to energy storage to be emergency turn work, brake accumulator is always brake system work, and when having ensured emergency turn, brake system still can normally work.
Be described further below in conjunction with the variable delivery hydraulic system of accompanying drawing to underground of the present utility model mine truck.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing underground mine truck fixed dilivery hydraulic system;
Fig. 2 is the schematic diagram of the first embodiment of variable delivery hydraulic system of the utility model underground mine truck;
Fig. 3 is the schematic diagram of variable delivery hydraulic system the second embodiment of the utility model underground mine truck.
Detailed description of the invention
As shown in Figure 2, the first embodiment of the variable delivery hydraulic system of the utility model underground mine truck, comprise load-reacting pump 1, shuttle valve 3, steering module, first steering cylinder 7, second steering cylinder 71, brake accumulator 8, meet an urgent need and turn to energy storage 9, prefill valve 11, brake pump 16, fuel tank 17, steering module comprises deflector 5 and flow amplifier 6, the S mouth of load-reacting pump 1 communicates with fuel tank 17 through butterfly valve, B mouth is communicated with the oil inlet HP of flow amplifier 6 through the first check valve 2, the L mouth of load-reacting pump 1 communicates with fuel tank 17 through unloading line 20, X mouth is communicated with drain line 20 through electromagnetic valve 4.First check valve 2 does not impact by cut-back pressure for the protection of load-reacting pump.
The P mouth of flow amplifier 6, working hole L, working hole R, oil return inlet T are communicated with the oil inlet P of deflector 5, working hole L, working hole R, oil return inlet T respectively, the PP mouth of flow amplifier 6 is communicated with the oil inlet P of deflector 5, first working hole CL of flow amplifier 6 is communicated with the rod chamber of the first steering cylinder 7, the rodless cavity of the second steering cylinder 71 respectively, and the second working hole CR of flow amplifier 6 is communicated with the rodless cavity of the first steering cylinder 7, the rod chamber of the second steering cylinder 71 respectively.3rd working hole EF of flow amplifier 6 is communicated with the oil inlet P of work system, and the return opening HT of flow amplifier 6, the oil return inlet T of work system are communicated with fuel tank 17 through oil return line 21 respectively, oil return line 21 install back oil strainer 22.
The LS mouth of deflector 5 is communicated with the LS mouth of flow amplifier 6, the A1 mouth of shuttle valve 3 respectively, and the LS mouth of work system is communicated with the A2 mouth of shuttle valve 3, and the A3 mouth of shuttle valve 3 is communicated with the X mouth of load-reacting pump 1.Shuttle valve 3 is used for obtaining the load pressure signal of deflector and work system, thus feeds back to load-reacting pump 1, realizes providing pressure oil to deflector or work system action.
Brake pump 16 can adopt gear type pump, the import of brake pump 16 communicates with fuel tank 17, outlet is communicated with the oil inlet P of prefill valve 11 through the second check valve 18, high pressure filter 13, oil return inlet T 1, the T2 of prefill valve 11 are communicated with oil return line 21 respectively, the working hole A of prefill valve 11 is communicated with brake system through the 3rd check valve 19, meet an urgent need in parallel with on the pipeline between the 3rd check valve 19 of the working hole A of prefill valve 11 turns to energy storage 9, the 3rd check valve 19 brake accumulator 8 in parallel with on the pipeline between brake system.Meeting an urgent need turns to energy storage 9 to be communicated with the oil inlet HP of flow amplifier 6 through valve 10, when valve 10 is opened, meets an urgent need and turns to the pressure oil one direction in energy storage 9 to flow to the oil inlet HP of flow amplifier 6.When valve 10 is for load-reacting failure of pump, pressure oil is provided to deflector, because steering swivel system and work system pressure are generally greater than 200bar, and emergent turn to the topping up top pressure of energy storage lower than 180bar, in order to ensure steering swivel system and emergent turn to not go here and there between energy storage press, as shown in Figure 2, preferential employing two-way stop electromagnetic valve, but be not limited thereto form, the check valve and unidirectional stop valve that are connected in series can also be adopted, or other be based on this deformation design.
Second check valve 18 does not impact by cut-back pressure for the protection of brake pump, and high pressure filter 13, for the impurity in filtering system, achieves the circulating filtration of hydraulic oil, improves the cleanliness level of hydraulic efficiency pressure system, decreases the fault of load-reacting pump.Prefill valve 11 for controlling brake accumulator and the emergent topping up scope turning to energy storage, when energy storage pressure lower than during certain certain value to energy storage topping up, when energy storage pressure stops topping up higher than during certain certain value.Brake accumulator turns to energy storage pressure store energy with emergent, even if still can brake 5 ~ 8 times in fault or when shutting down, improves safety and the reliability of complete machine.
Electromagnetic relief valve 12 in parallel on oil pipe between high pressure filter 13 and the oil inlet P of prefill valve 11, the oil return inlet T of electromagnetic relief valve 12 communicates with fuel tank 17.Electromagnetic relief valve 12 is for starting off-load, during startup electromagnetic valve wherein 121 electric, the pressure oil that brake pump 16 exports, directly by electromagnetic valve 121 oil sump tank, is avoided brake pump 16 to be with carrying starting, start rear electromagnetic valve 121 dead electricity, by pass valve 122 restriction system top pressure wherein.
Emergency pump set 15 in parallel between the import of brake pump 16 and the outlet of the second check valve 18, the 4th check valve 14 is installed in the exit of emergency pump set 15.Emergency pump set can adopt gear type pump, by DC motor Driver.
The working process of the first embodiment of variable delivery hydraulic system of above-mentioned underground mine truck is as follows:
Without when turning to, the LS mouth of deflector 5 is communicated with T mouth, in flow amplifier 6, the spool of pressure-gradient control valve 61 is in left position, the pressure oil that load-reacting pump 1 exports, in the first check valve 2, flow amplifier 6, the 3rd working hole EF of pressure-gradient control valve 61, flow amplifier 6 flows into the P mouth of work system, thus provides pressure oil for work system.
During left-hand rotation, partial pressure oil flows to L mouth from the P mouth of deflector 5, then the L mouth of flow amplifier 6 is flowed into, feedback pressure oil is from the LS mouth of deflector 5, flow into the LS mouth of flow amplifier 6, promote pressure-gradient control valve 61 and move to right position, simultaneously through the X mouth of the A1 mouth inflow load-reacting pump 1 of shuttle valve 3, the pressure oil that load-reacting pump 1 exports flows into the oil inlet HP of flow amplifier 6 through the first check valve 2, again by pressure-gradient control valve 61, then flow out from the first working hole CL of flow amplifier 6, promote first, second steering cylinder 7,71 action, realize.
During right-hand rotation, partial pressure oil flows to R mouth from the P mouth of deflector 5, then the R mouth of flow amplifier 6 is flowed into, feedback pressure oil is from the LS mouth of deflector 5, flow into the LS mouth of flow amplifier 6, promote pressure-gradient control valve 61 and move to right position, simultaneously through the X mouth of the A1 mouth inflow load-reacting pump of shuttle valve 3, the pressure oil that load-reacting pump 1 exports flows into the oil inlet HP of flow amplifier 6 through the first check valve 2, again by pressure-gradient control valve 61, then flow out from the second working hole CR of flow amplifier 6, promote first, second steering cylinder 7,71 action, realize turning right.
During normal brake application operating mode, hydraulic oil, under brake pump 16 acts on, flows into brake system through the second check valve 18, high pressure filter 13, prefill valve 11, the 3rd check valve 19, thus provides pressure oil for brake system.
Under nominal situation, valve 10 must not be electric, and brake accumulator 8 turns to energy storage 9 to be brake system stored energy with emergent.When brake pump 16 breaks down, brake accumulator 8 turns to energy storage 9 all to brake system fuel feeding with emergent, ensure that the safety of equipment.
When negative pressure sensitive variable pump 1 fault, as in controllable capacity pump, pressure-modulation valve is stuck, controllable capacity pump is in minimum injection rate, when cannot increase, valve 10 obtains electric, meets an urgent need and turns to energy storage 9 to steering module fuel feeding, for first, second steering cylinder 7,71 provides propulsion source, thus realize emergency turn.Relying on meets an urgent need turns to energy storage fuel feeding, and vehicle at least can go to the most left or least significant from centre.
When engine breakdown, emergency pump set 15 is energized, DC motor Driver gear type pump, pressure oil by the 4th check valve 14, high pressure filter 13, prefill valve 11 is to brake accumulator 8 and emergent turn to energy storage 9 topping up, thus realize emergently turning to and removing braking function.After reaching setting pressure, prefill valve 11 off-load, emergency pump set 15 no-load run, thus add the time of run of DC machine, under normal circumstances, storage battery reliable power supply can be ensured 1 hour.
As shown in Figure 3, the second embodiment of the variable delivery hydraulic system of the utility model underground mine truck, substantially identical with the principle of the first embodiment, difference is only that steering module comprises deflector 5a and pressure-gradient control valve 6a, the B mouth of load-reacting pump 1 is communicated with the oil inlet P of pressure-gradient control valve 6a, the working hole CF of pressure-gradient control valve 6a is communicated with the oil inlet P of deflector 5a, the 3rd working hole EF of pressure-gradient control valve 6a is communicated with the oil inlet P of work system, the oil return inlet T of pressure-gradient control valve 6a is communicated with fuel tank 17, the first working hole L of deflector 5a respectively with the rod chamber of the first steering cylinder 7, the rodless cavity of the second steering cylinder 71 is communicated with, the second working hole R of deflector 5a respectively with the rodless cavity of the first steering cylinder 7, the rod chamber of the second steering cylinder 71 is communicated with, the oil return inlet T of deflector 5a is communicated with fuel tank 17 through oil return line 21, the LS mouth of deflector 5a respectively with the LS mouth of pressure-gradient control valve 6a, the A1 mouth of shuttle valve 3 is communicated with, meeting an urgent need turns to energy storage 9 to be communicated with through the oil inlet P of valve 10 with pressure-gradient control valve 6a, when valve 10 is opened, meeting an urgent need turns to the pressure oil one direction in energy storage 9 to flow to the oil inlet P of pressure-gradient control valve 6a.
The working process of the second embodiment is:
Without when turning to, the LS mouth of deflector 5a is communicated with T mouth, and pressure-gradient control valve 6a is in left position, the pressure oil that load-reacting pump 1 exports, enter pressure-gradient control valve 6a through the first check valve 2, flow into the P mouth of work system from the 3rd working hole EF of pressure-gradient control valve, thus provide pressure oil for work system.
During left-hand rotation, partial pressure oil flows to L mouth from the P mouth of deflector 5a, feedback pressure oil is from the LS mouth of deflector 5a, flow into the LS mouth of pressure-gradient control valve 6a, promote pressure-gradient control valve 6a and move to right position, simultaneously through the X mouth of the A1 mouth inflow load-reacting pump 1 of shuttle valve 3, the pressure oil that load-reacting pump 1 exports enters deflector P mouth through the first check valve 2, pressure-gradient control valve 6a, then flow out from the first working hole L of deflector 5a, promote first, second steering cylinder 7,71 action, realize.
During right-hand rotation, partial pressure oil flows to R mouth from the P mouth of deflector 5a, feedback pressure oil is from the LS mouth of deflector 5a, flow into the LS mouth of pressure-gradient control valve 6a, promote pressure-gradient control valve 6a and move to right position, simultaneously through the X mouth of the A1 mouth inflow load-reacting pump of shuttle valve 3, the pressure oil that load-reacting pump 1 exports enters deflector P mouth through the first check valve 2, pressure-gradient control valve 6a, then flow out from the second working hole R of deflector 5a, promote first, second steering cylinder 7,71 action, realize turning right.
Working process under other operating modes is identical with the first embodiment.
The variable delivery hydraulic system of the utility model underground mine truck compared with prior art, has the following advantages:
1) adopt load-reacting pump, obtained the load pressure signal of deflector and work system by shuttle valve, thus feed back to load-reacting pump, regulated variable capacity of pump can be needed according to load, reduce the power dissipation of system and the temperature rise of hydraulic oil;
2) set up prefill valve, brake accumulator and met an urgent need and turn to energy storage, when mine truck normally travels, brake accumulator turns to energy storage to be brake system stored energy with emergent, when brake pump breaks down, brake accumulator turns to energy storage all to brake system fuel feeding with emergent, increases the volume of brake accumulator, extends supply time, decrease topping up number of times, thus extend the service life of brake pump and prefill valve; When negative pressure sensitive variable failure of pump, meeting an urgent need turns to energy storage to deflector fuel feeding, the pressure oil of more than 50L/min still can be provided, thus realize urgent quick steering, without the need to independent configuration, achieve emergency turn faster with most economical, the simplest mode, reduce complexity and the cost of system, improve the reliability and security of system;
3) before brake accumulator, arrange the 3rd check valve, make emergent to turn to energy storage to be emergency turn work, brake accumulator is always brake system work, and when having ensured emergency turn, brake system still can normally work;
4) brake delivery side of pump electromagnetic relief valve in parallel, obtain electric during device start, power-off after starting, realizes the No Load Start of brake pump;
5) the X mouth of load-reacting pump is communicated with drain line through electromagnetic valve, electromagnetic valve is used for the startup off-load of equipment, when device start, electromagnetic valve obtains electric, the X mouth of load-reacting pump is directly communicated with drain line, without the need to passing through the elongated LS backfeed loop of deflector, and drain line is generally not less than 19 latus rectums, resistance is less, the quick switching of pressure-difference valve in controllable capacity pump can be realized, load-reacting pump is made to be decreased to minimum injection rate fast, thus realize No Load Start, system is made to have good cold-starting characteristic, prevent when cold-starting, because oil viscosity is larger, there is certain pressure in deflector LS feedback pipe, when causing controllable capacity pump to start, discharge capacity can not reduce to minimum, driving engine band carries startup, starter motor is caused to damage, even cannot start the engine,
6) emergency pump set in parallel between the import and the outlet of the second check valve of brake pump, when engine breakdown, emergency pump set is energized, and by prefill valve, turns to energy storage, brake accumulator topping up to emergent, both can brake off, achieving again emergent turning to; Simultaneously due to the unloading function of prefill valve, avoid that emergency pump set is long-time, heavy load running, add the time of run of DC machine.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (10)
1. the variable delivery hydraulic system of a underground mine truck, comprise the first steering cylinder, the second steering cylinder, brake pump, fuel tank, it is characterized in that: also comprise steering module, load-reacting pump, shuttle valve, brake accumulator, meeting an urgent need turns to energy storage, prefill valve, the S mouth of load-reacting pump communicates with fuel tank, B mouth is communicated with the oil inlet of steering module, the L mouth of load-reacting pump is communicated with fuel tank through unloading line
First working hole of steering module is communicated with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder respectively, second working hole of steering module is communicated with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder respectively, 3rd working hole of steering module is communicated with the oil inlet P of work system, the return opening of steering module, the oil return inlet T of work system are communicated with fuel tank through oil return line respectively, the LS mouth of steering module is communicated with the A1 mouth of shuttle valve, the LS mouth of work system is communicated with the A2 mouth of shuttle valve, the A3 mouth of shuttle valve is communicated with the X mouth of load-reacting pump
The import of brake pump communicates with fuel tank, outlet is communicated with the oil inlet P of prefill valve, the oil return inlet T 1 of prefill valve, T2 is communicated with oil return line respectively, the working hole A of prefill valve is communicated with brake system through the 3rd check valve, brake accumulator in parallel on 3rd pipeline between check valve with brake system, meet an urgent need in parallel with on the pipeline between the 3rd check valve of the working hole A of prefill valve turns to energy storage, meeting an urgent need turns to energy storage to be communicated with the oil inlet of steering module through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet of steering module.
2. the variable delivery hydraulic system of underground according to claim 1 mine truck, it is characterized in that: described steering module comprises deflector and flow amplifier, the P mouth of flow amplifier, working hole L, working hole R, oil return inlet T respectively with the oil inlet P of deflector, working hole L, working hole R, oil return inlet T is communicated with, the PP mouth of flow amplifier is communicated with the oil inlet P of deflector, the B mouth of load-reacting pump is communicated with the oil inlet HP of flow amplifier, first working hole CL of flow amplifier respectively with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder is communicated with, second working hole CR of flow amplifier respectively with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder is communicated with, 3rd working hole EF of flow amplifier is communicated with the oil inlet P of work system, the return opening HT of flow amplifier is communicated with fuel tank through oil return line, the LS mouth of deflector respectively with the LS mouth of flow amplifier, the A1 mouth of shuttle valve is communicated with, meeting an urgent need turns to energy storage to be communicated with the oil inlet HP of flow amplifier through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet HP of flow amplifier.
3. the variable delivery hydraulic system of underground according to claim 1 mine truck, it is characterized in that: described steering module comprises pressure-gradient control valve and deflector, the B mouth of load-reacting pump is communicated with the oil inlet P of pressure-gradient control valve, the working hole CF of pressure-gradient control valve is communicated with the oil inlet P of deflector, 3rd working hole EF of pressure-gradient control valve is communicated with the oil inlet P of work system, the oil return inlet T of pressure-gradient control valve is communicated with fuel tank, first working hole L of deflector respectively with the rod chamber of the first steering cylinder, the rodless cavity of the second steering cylinder is communicated with, second working hole R of deflector respectively with the rodless cavity of the first steering cylinder, the rod chamber of the second steering cylinder is communicated with, the oil return inlet T of deflector is communicated with fuel tank through oil return line, the LS mouth of deflector respectively with the LS mouth of pressure-gradient control valve, the A1 mouth of shuttle valve is communicated with, meeting an urgent need turns to energy storage to be communicated with the oil inlet P of pressure-gradient control valve through valve, during described valve opening, meeting an urgent need turns to the pressure oil one direction in energy storage to flow to the oil inlet P of pressure-gradient control valve.
4. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: described braking delivery side of pump and electromagnetic relief valve in parallel on the oil pipe between prefill valve oil inlet P, the oil return inlet T of electromagnetic relief valve communicates with fuel tank.
5. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: the X mouth of described load-reacting pump is communicated with drain line through electromagnetic valve.
6. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: described braking delivery side of pump is communicated with the oil inlet P of prefill valve through the second check valve.
7. the variable delivery hydraulic system of underground according to claim 6 mine truck, is characterized in that: emergency pump set in parallel between the import of described brake pump and the outlet of the second check valve, and the 4th check valve is installed in the exit of emergency pump set.
8. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: described valve adopts two-way stop electromagnetic valve.
9. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: described valve adopts the check valve and unidirectional stop valve that are connected in series.
10. the variable delivery hydraulic system of the underground mine truck according to Claims 2 or 3, is characterized in that: B mouth place's installation first check valve of described load-reacting pump.
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| CN201520606077.3U CN205022676U (en) | 2015-08-12 | 2015-08-12 | Variable hydraulic system of underground mine -car |
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| CN201520606077.3U CN205022676U (en) | 2015-08-12 | 2015-08-12 | Variable hydraulic system of underground mine -car |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882778A (en) * | 2017-11-16 | 2018-04-06 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of ultra-precision machine tool oil supply system with emergent supply capability |
| CN108082278A (en) * | 2017-11-22 | 2018-05-29 | 徐州徐工矿山机械有限公司 | A kind of machine driving articulated truck assisted diversion hydraulic system |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN111152838A (en) * | 2018-11-08 | 2020-05-15 | 扬州盛达特种车有限公司 | Hydraulic integrated control device for mine car steering system and box body lifting system |
| CN113653685A (en) * | 2021-09-10 | 2021-11-16 | 湖北金诚信矿业服务有限公司 | Hydraulic system of concrete mixer truck |
| CN114523947A (en) * | 2020-11-23 | 2022-05-24 | 比亚迪股份有限公司 | Pressure abnormality detection method for brake system, brake control unit, and vehicle |
| CN116771740A (en) * | 2023-08-18 | 2023-09-19 | 湖南星邦智能装备股份有限公司 | High-position forklift truck, hydraulic control system and method based on single-pump oil supply |
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2015
- 2015-08-12 CN CN201520606077.3U patent/CN205022676U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882778A (en) * | 2017-11-16 | 2018-04-06 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of ultra-precision machine tool oil supply system with emergent supply capability |
| CN108082278A (en) * | 2017-11-22 | 2018-05-29 | 徐州徐工矿山机械有限公司 | A kind of machine driving articulated truck assisted diversion hydraulic system |
| CN108082278B (en) * | 2017-11-22 | 2024-04-05 | 徐州徐工矿山机械有限公司 | Mechanical transmission hinged auxiliary steering hydraulic system of dumper |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN111152838A (en) * | 2018-11-08 | 2020-05-15 | 扬州盛达特种车有限公司 | Hydraulic integrated control device for mine car steering system and box body lifting system |
| CN111152838B (en) * | 2018-11-08 | 2023-08-15 | 潍柴(扬州)特种车有限公司 | Hydraulic integrated control device for mine car steering system and box lifting system |
| CN114523947A (en) * | 2020-11-23 | 2022-05-24 | 比亚迪股份有限公司 | Pressure abnormality detection method for brake system, brake control unit, and vehicle |
| CN113653685A (en) * | 2021-09-10 | 2021-11-16 | 湖北金诚信矿业服务有限公司 | Hydraulic system of concrete mixer truck |
| CN116771740A (en) * | 2023-08-18 | 2023-09-19 | 湖南星邦智能装备股份有限公司 | High-position forklift truck, hydraulic control system and method based on single-pump oil supply |
| CN116771740B (en) * | 2023-08-18 | 2023-11-07 | 湖南星邦智能装备股份有限公司 | High-position forklift truck, hydraulic control system and method based on single-pump oil supply |
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