CN203391619U - Single-pump dual-motor-driven engineering vehicle and control device of hydraulic system thereof - Google Patents
Single-pump dual-motor-driven engineering vehicle and control device of hydraulic system thereof Download PDFInfo
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- CN203391619U CN203391619U CN201320383194.9U CN201320383194U CN203391619U CN 203391619 U CN203391619 U CN 203391619U CN 201320383194 U CN201320383194 U CN 201320383194U CN 203391619 U CN203391619 U CN 203391619U
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Abstract
The utility model discloses a single-pump dual-motor-driven engineering vehicle and a control device of a hydraulic system thereof. The control device comprises a diverter valve which is serially connected between a pump and two parallel motors. The control device additionally comprises an information acquisition unit, an electromagnetic reversing valve and a controller, wherein the information acquisition unit is used for acquiring turning angle information of front wheels of the engineering vehicle; a first oil port of the electromagnetic reversing valve is connected with an oil outlet of the pump, a second oil port is connected with an oil tank, and a third oil port is connected with the control end of the divider valve; the controller is respectively connected with the information acquisition unit and the control end of the electromagnetic reversing valve, and comprises a mode control unit which is used for controlling the third oil port to be communicated with the first oil port or the second oil port according to the turning angle information. The control device of the hydraulic system of the single-pump dual-motor-driven engineering vehicle provided by the utility model has the advantages that the traction force of the engineering vehicle can be effectively promoted, and the problem that the motors suck air is solved.
Description
Technical field
The utility model relates to the control field of hydraulic efficiency pressure system, particularly a kind of control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system and be equiped with the engineering truck of this control setup.
Background technology
At present, hydraulic driving earth leveller can adopt the bimotored mode of single parallel connection of pumps to drive.For overcoming both sides tire, in difference, adhere to the monolateral unbalance loading of conditioned disjunction and occur the situation of skidding, the patent No. is in the document of CN200810176483, to be disclosed in the flow divider valve of connecting between pump and motor, this flow divider valve is not devoted oneself to work in normal operation and turning process, only exceed preset rotation speed (two wheel speeds are poor very large than scope left and right hydraulic motor rotary speed ratio being detected, be monolateral skidding) time, control flow divider valve and force shunting.Yet, when there is monolateral skidding, first need to measure through both sides motor rotary speed, and then program judgement is so that flow divider valve shunting, causes engineering truck (as road grader) to occur pit digging phenomenon at the whole process need cost regular hour; In addition, when the fast difference of two wheel motors is larger, force flow divider valve to drop into, the motor of the very fast one end of rotating speed, because repairing can not be supplied in time, there will be of short duration emptying phenomenon, and motor life is caused to adverse effect.
Therefore, the problem that emptying phenomenon easily appears in the tractive force decline that the vehicle pit digging occurring in those skilled in the art's above-mentioned single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system urgently to be resolved hurrily causes and motor.
Utility model content
In view of this, the utility model proposes a kind of control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system and be equiped with the engineering truck of this control setup, with solve that tractive force that existing single pump dual-motor driving engineering vehicle pit digging causes declines and hydraulic efficiency pressure system in motor easily inhale empty deficiency.
On the one hand, the utility model provides a kind of control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system, comprise the flow divider valve being connected between pump and two motors in parallel, this control setup also comprises: for obtaining the information acquisition unit of the steering angle information of engineering truck front-wheel; Solenoid directional control valve, the first hydraulic fluid port of described solenoid directional control valve connects the oil outlet of described pump, and the second hydraulic fluid port connects fuel tank, and the 3rd hydraulic fluid port connects the control end of described flow divider valve; Controller, connects respectively the control end of described information acquisition unit and described solenoid directional control valve; Described controller comprises for control the pattern control unit that described the 3rd hydraulic fluid port is communicated with or is communicated with the second hydraulic fluid port with the first hydraulic fluid port according to described steering angle information.
Further, described information acquisition unit comprises angular transducer, and described angular transducer is arranged on the propons steering shaft of described engineering truck.
Further, described information acquisition unit comprises: the first travel switch and the second travel switch; Described control setup also comprises: with the first limiting stopper of described the first travel switch mating reaction and with the second limiting stopper of described the second travel switch mating reaction; Described the first travel switch and the second travel switch are arranged on the propons crane span structure of described engineering truck, and described the first limiting stopper and the second limiting stopper are arranged on respectively on two steering shafts of described engineering truck propons.
Further, described information acquisition unit comprises: the first approach switch and the second approach switch; Described control setup also comprises: with the first binary pair of described the first approach switch mating reaction and with the second binary pair of described the second approach switch mating reaction; Described the first approach switch and the second approach switch are arranged on the propons crane span structure of described engineering truck, and described the first binary pair and the second binary pair are arranged on respectively on two steering shafts of described engineering truck propons.
Further,, described information acquisition unit comprises for the first displacement pickup of the piston rod displacement information of the first steering cylinder of engineering truck described in sensing and for the second displacement sensor of the piston rod displacement information of the second steering cylinder of engineering truck described in sensing; Described control setup also comprises for determine the processing unit of the steering angle information of described engineering truck front-wheel according to the piston rod displacement information of the piston rod displacement information of described the first steering cylinder or described the second steering cylinder; Described processing unit connects respectively described the first displacement pickup, second displacement sensor and controller.
Further, described control setup also comprises electric switch; Described controller is connected with described electric switch, and described controller comprises the mode selecting unit that is communicated with or is communicated with the second hydraulic fluid port with the first hydraulic fluid port for control described the 3rd hydraulic fluid port according to the action message of described electric switch.
Further, described pattern control unit and the integrated setting of mode selecting unit.
Further, described solenoid directional control valve is two position three way directional control valve
The utility model list pump dual-motor driving engineering vehicle hydraulic efficiency pressure system is when normal operation, and flow divider valve is devoted oneself to work, and both sides motor flow is consistent, jointly drives vehicle to run, thereby has given play to larger tractive force; With timed unit, by information acquisition unit, obtain the steering angle information of engineering truck front-wheel, when front-wheel steering angle surpasses certain scope, to control the 3rd hydraulic fluid port is communicated with the second hydraulic fluid port, flow divider valve is in free gear state, two motors, according to self-operating state assignment flow, can effectively solve motor and inhale empty problem.
On the other hand, the utility model also provides a kind of single pump dual-motor driving engineering vehicle, comprises pump, two motors in parallel that are connected with described pump, the control setup of above-mentioned any single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system.
Further, described single pump dual-motor driving engineering vehicle is road grader.
This list pump dual-motor driving engineering vehicle possesses the corresponding technique effect of control setup of above-mentioned single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system, does not hereby repeat.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
The structural representation of the control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system that Fig. 1 provides for the utility model embodiment mono-;
The structural representation of the control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system that Fig. 2 provides for the utility model embodiment bis-.
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the utility model can combine mutually.The material of placing in the control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system in the present embodiment can be including but not limited to bituminous mixture.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
The structural representation of the control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system that Fig. 1 provides for the utility model embodiment mono-; It should be noted that, for the ease of understanding and describing, pump 1 in Fig. 1 and relevant valve group thereof, fuel tank 2, two motors in parallel 4 belong to the component part of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system, be the control object of the utility model control setup embodiment, should not be construed as the component part of control setup.As shown in Figure 1, the control setup of the present embodiment list pump dual-motor driving engineering vehicle hydraulic efficiency pressure system can comprise: be connected on flow divider valve 3, information acquisition unit (information acquisition unit is angular transducer 13 in the present embodiment), solenoid directional control valve 5 and controller 6 between pump 1 and two motors in parallel 4; Wherein, angular transducer 13 is for obtaining the steering angle information of engineering truck front-wheel; The first hydraulic fluid port of solenoid directional control valve 5 connects the oil outlet M of pump 1, and the second hydraulic fluid port connects fuel tank, and the 3rd hydraulic fluid port connects the control end of flow divider valve 3; The control end of controller 6 difference connection angle sensors 13 and solenoid directional control valve 5; Controller 6 comprises pattern control unit 61, is communicated with or controls the 3rd hydraulic fluid port to be communicated with the second hydraulic fluid port for steering angle information control the 3rd hydraulic fluid port of carrying according to angular transducer 13 with the first hydraulic fluid port.
Above-mentioned controller 6 is as follows to the concrete control process of solenoid directional control valve 5 according to steering angle information: the steering angle information of carrying according to angular transducer 13 at controller 6 is determined and reached preset angles by steering angle (steering angle surpasses after this preset angles, flow divider valve 3 repairing in time, cause motor 4 to occur emptying phenomenon, damage motor 4) time, the 3rd hydraulic fluid port of controlling solenoid directional control valve 5 is communicated with the second hydraulic fluid port, now, the control end of flow divider valve 3 is communicated with fuel tank, flow divider valve 3 is (no longer in a minute stream mode) in free gear position, two motors in parallel 4 are according to self-operating state assignment flow, thereby eliminating motor 4 builds the pressure and inhales empty phenomenon, when the steering angle information that controller 6 is carried according to angular transducer 13 determines that front-wheel steering angle is less than after this preset angles, the 3rd hydraulic fluid port that controller 12 is controlled solenoid directional control valve 5 is communicated with the first hydraulic fluid port, be that the control end of flow divider valve 3 and the oil outlet M of pump 1 are communicated with, make flow divider valve 3 again in a minute stream mode, two motor 4 flows are basically identical, given play to larger tractive force.Like this, by increase angular transducer 13 at propons place, when front-wheel steering angle surpasses certain scope (above-mentioned preset angles), flow divider valve 3 is withdrawn from time, can effectively be solved motor and inhale empty problem.
Preferably, above-mentioned control setup also comprises electric switch 14; Controller 6 is connected with electric switch 14, and controller 6 comprises mode selecting unit 63, for controlling the 3rd hydraulic fluid port according to the action message of electric switch 14, is communicated with or is communicated with the second hydraulic fluid port with the first hydraulic fluid port.Setting by electric switch 14 can be so that select work pattern and walking mode on engineering truck, wherein, this work pattern is that the 3rd hydraulic fluid port that controller 6 is controlled solenoid directional control valve 5 according to the action of electric switch 14 (closed or disconnection) is communicated with the first hydraulic fluid port, flow divider valve 3 is devoted oneself to work in a minute stream mode, the flow of two motors 4 approaches identical, except a small amount of throttle loss, machine power is all for driving, engineering truck powerful now, operation is strong, it is larger that this work pattern is used in load, the occasion of the wet and slippery and high speed operation (as road grader shovels at a high speed snow) in ground, walking mode is that controller 6 is communicated with the second hydraulic fluid port according to the 3rd hydraulic fluid port of the action control solenoid directional control valve 5 of electric switch 14, flow divider valve 3 is in free gear state, pump 1 is directly in parallel with two motors 4, reduce like this throttle loss of flow divider valve 3, this walking mode is applied to transition etc. and needs that engineering truck is walked fast, the good occasion of working condition.Like this, on engineering truck, by electric switch 14, can select work pattern or walking mode, when working or need large load operation, adopt work pattern, under work pattern, flow divider valve 3, always in a minute stream mode, has been eliminated the problem of response time length in forcing flow divider valve shunting process in prior art when there is monolateral skidding.
According to experimental test, find to exist under above-mentioned work pattern a problem, that is: when engineering truck Nose Wheel Steering surpasses certain angle (being less than above-mentioned preset angles), in although turn, motor 4 flows in outside are identical but have speed discrepancy, motor 4 rotating speeds of inner side are slow and pressure raises, there is soon emptying phenomenon in motor 4 rotating speeds in outside, because flow divider valve 3 itself has certain shunting precision, the flow of two motors 4 is not in full accord, flow divider valve 3 can be reduced to a certain extent and be inhaled sky by repairing simultaneously, but steering angle surpasses after above-mentioned preset angles, flow divider valve 3 repairings cannot supplement in time, now, the motor 4 that is positioned at outside there will be serious emptying phenomenon, there is the situation of pressure cut off in the motor 4 that is positioned at inner side, the present embodiment turns to identification by above-mentioned angular transducer 13, and then at steering angle, surpass certain scope (over above-mentioned preset angles by controller 6, while there is slipping state in engineering truck) time, withdraw from flow divider valve 3(and allow flow divider valve 3 in free gear state), eliminate motor 4 and build the pressure and emptying phenomenon, when steering angle is less than above-mentioned preset angles, make flow divider valve 3 again in a minute stream mode, the flow of two motors 4 is consistent, has given play to larger tractive force.
During concrete operations, the installation site of angular transducer 1 can arrange according to actual needs, as: in order to improve sensing precision, angular transducer 1 can be arranged on the propons steering shaft of engineering truck; Pattern control unit 61 can integratedly arrange with mode selecting unit 63; Solenoid directional control valve 5 can be two position three way directional control valve etc.
The control setup of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system of the present embodiment is controlled solenoid directional control valve by controller under work pattern and is communicated with the control end of flow divider valve and the oil outlet of pump and then makes flow divider valve in a minute stream mode, guaranteed that left and right motor flow is consistent, effectively improve tractive force, eliminated the problem of response time length in forcing flow divider valve shunting process in prior art when there is monolateral skidding; When Nose Wheel Steering surpasses preset angles, controller is controlled control end that solenoid directional control valve is communicated with flow divider valve with fuel tank and then is made flow divider valve in free gear state, and elimination motor builds the pressure and emptying phenomenon.
The structural representation of single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system that Fig. 2 provides for the utility model embodiment bis-, the present embodiment is the difference that arranges of information acquisition unit with respect to difference embodiment illustrated in fig. 1, for simplicity of illustration, in Fig. 2, saved solenoid directional control valve 5, flow divider valve 3 and controlled object (hydraulic efficiency pressure system of engineering truck), annexation between major embodiment information acquisition unit and controller 6, simultaneously in order to embody the setting position of information acquisition unit, Fig. 2 has embodied the propons vehicle frame that does not belong to the utility model control setup embodiment, steering shaft, the elements such as the first steering cylinder 11 and the second steering cylinder 12.As shown in Figure 2, in the present embodiment, information acquisition unit comprises: for the first travel switch 7 and second travel switch 8 of sensing engineering truck steering angle on left and right directions; Correspondingly, above-mentioned control setup also comprises: with the first limiting stopper 9 of the first travel switch 7 mating reactions and with the second limiting stopper 10 of the second travel switch 8 mating reactions; Wherein, the first travel switch 7 and the second travel switch 8 are arranged on the propons crane span structure of engineering truck, and the first limiting stopper 9 and the second limiting stopper 10 are arranged on respectively on two steering shafts of engineering truck propons.
When the front-wheel steering of engineering truck surpasses above-mentioned preset angles, the first limiting stopper 9 near the first travel switch 7 or the second limiting stopper 10 near the second travel switch 8, the first travel switch 7 or the second travel switch 8 are by generation signal and be transferred to controller 6, controller 6 is controlled flow divider valve 3 by solenoid directional control valve 5, make flow divider valve 3 in free gear position, reach elimination motor and build the pressure and emptying phenomenon; When front-wheel steering angle is less than after above-mentioned preset angles, the first travel switch 7 or the second travel switch 8 correspondences are away from the first limiting stopper 9 and the second limiting stopper 10, and no signal is exported, and controller 6 is controlled flow divider valves 3 in a minute stream mode by solenoid directional control valve 5.
Be understandable that, information acquisition unit can also comprise: the first approach switch (scheming not shown) and the second approach switch (scheming not shown); Control setup also comprises: with first binary pair (scheming not shown) of the first approach switch mating reaction and with second binary pair (scheming not shown) of the second approach switch mating reaction.The first approach switch and the second approach switch are arranged on the propons crane span structure of engineering truck, and the first binary pair and the second binary pair are arranged on respectively on two steering shafts of engineering truck propons.
Certainly, in a kind of unshowned embodiment, information acquisition unit can also comprise the first displacement pickup and second displacement sensor, the first displacement pickup is for the piston rod displacement information of the first steering cylinder 11 of sensing engineering truck, and second displacement sensor is for the piston rod displacement information of the second steering cylinder 12 of sensing engineering truck.Correspondingly, control setup also comprises the processing unit that connects respectively the first displacement pickup, second displacement sensor and controller 6, and processing unit is for determining the steering angle information of front-wheel on first direction (as the left side) and for determine the steering angle information of front-wheel in second direction (as the right) according to the piston rod displacement information of the second steering cylinder 12 according to the piston rod displacement information of the first steering cylinder 11.
The utility model also provides a kind of single pump dual-motor driving engineering vehicle embodiment, and it comprises pump, two motors in parallel that are connected with pump and the control setup of above-mentioned single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system.Engineering truck can include but not limited to road grader.This project vehicle possesses the corresponding technique effect of control setup of above-mentioned single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system, does not hereby repeat.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a control setup for single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system, comprising: be connected on the flow divider valve (3) between pump (1) and two motors in parallel (4), it is characterized in that, also comprise:
For obtaining the information acquisition unit of the steering angle information of engineering truck front-wheel;
Solenoid directional control valve (5), the first hydraulic fluid port of described solenoid directional control valve (5) connects the oil outlet (M) of described pump (1), and the second hydraulic fluid port connects fuel tank, and the 3rd hydraulic fluid port connects the control end of described flow divider valve (3);
Controller (6), connects respectively the control end of described information acquisition unit and described solenoid directional control valve (5); Described controller (6) comprises for control the pattern control unit (61) that described the 3rd hydraulic fluid port is communicated with the first hydraulic fluid port or is communicated with the second hydraulic fluid port according to described steering angle information.
2. control setup according to claim 1, is characterized in that, described information acquisition unit comprises angular transducer (13), and described angular transducer (13) is arranged on the propons steering shaft of described engineering truck.
3. control setup according to claim 1, is characterized in that, described information acquisition unit comprises: the first travel switch (7) and the second travel switch (8); Described control setup also comprises: with first limiting stopper (9) of described the first travel switch (7) mating reaction and with second limiting stopper (10) of described the second travel switch (8) mating reaction;
Described the first travel switch (7) and the second travel switch (8) are arranged on the propons crane span structure of described engineering truck, and described the first limiting stopper (9) and the second limiting stopper (10) are arranged on respectively on two steering shafts of described engineering truck propons.
4. control setup according to claim 1, is characterized in that, described information acquisition unit comprises: the first approach switch and the second approach switch; Described control setup also comprises: with the first binary pair of described the first approach switch mating reaction and with the second binary pair of described the second approach switch mating reaction;
Described the first approach switch and the second approach switch are arranged on the propons crane span structure of described engineering truck, and described the first binary pair and the second binary pair are arranged on respectively on two steering shafts of described engineering truck propons.
5. control setup according to claim 1, it is characterized in that, described information acquisition unit comprises for the first displacement pickup of the piston rod displacement information of first steering cylinder (11) of engineering truck described in sensing and for the second displacement sensor of the piston rod displacement information of second steering cylinder (12) of engineering truck described in sensing;
Described control setup also comprises for determine the processing unit of the steering angle information of described engineering truck front-wheel according to the piston rod displacement information of the piston rod displacement information of described the first steering cylinder (11) or described the second steering cylinder (12);
Described processing unit connects respectively described the first displacement pickup, second displacement sensor and controller (6).
6. according to the control setup described in any one in claim 1-5, it is characterized in that, also comprise electric switch (14); Described controller (6) is connected with described electric switch (14), and described controller (6) comprises for control the mode selecting unit (63) that described the 3rd hydraulic fluid port is communicated with the first hydraulic fluid port or is communicated with the second hydraulic fluid port according to the action message of described electric switch (14).
7. control setup according to claim 6, is characterized in that, described pattern control unit (61) and the integrated setting of mode selecting unit (63).
8. control setup according to claim 7, is characterized in that, described solenoid directional control valve (5) is two position three way directional control valve.
9. a single pump dual-motor driving engineering vehicle, comprise pump (1), two motors (4) in parallel that are connected with described pump (1), it is characterized in that, also comprise the control setup of the single pump dual-motor driving engineering vehicle hydraulic efficiency pressure system as described in any one in claim 1-8.
10. single pump dual-motor driving engineering vehicle according to claim 9, is characterized in that, described single pump dual-motor driving engineering vehicle is road grader.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320383194.9U CN203391619U (en) | 2013-06-28 | 2013-06-28 | Single-pump dual-motor-driven engineering vehicle and control device of hydraulic system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320383194.9U CN203391619U (en) | 2013-06-28 | 2013-06-28 | Single-pump dual-motor-driven engineering vehicle and control device of hydraulic system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805096A (en) * | 2016-06-08 | 2016-07-27 | 安徽海龙建筑工业有限公司 | Overturning closed loop synchronous hydraulic system for erecting machine |
| CN106351898A (en) * | 2016-10-21 | 2017-01-25 | 广西柳工机械股份有限公司 | Land leveler front wheel driving hydraulic system |
| CN106523445A (en) * | 2016-12-02 | 2017-03-22 | 贵州詹阳动力重工有限公司 | Control device and control method for vehicle |
| CN108571488A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | Pulsed hydraulic pressure divides synchronous valve |
-
2013
- 2013-06-28 CN CN201320383194.9U patent/CN203391619U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805096A (en) * | 2016-06-08 | 2016-07-27 | 安徽海龙建筑工业有限公司 | Overturning closed loop synchronous hydraulic system for erecting machine |
| CN106351898A (en) * | 2016-10-21 | 2017-01-25 | 广西柳工机械股份有限公司 | Land leveler front wheel driving hydraulic system |
| CN106351898B (en) * | 2016-10-21 | 2018-06-26 | 广西柳工机械股份有限公司 | Land leveller front wheel driven hydraulic system |
| CN106523445A (en) * | 2016-12-02 | 2017-03-22 | 贵州詹阳动力重工有限公司 | Control device and control method for vehicle |
| CN106523445B (en) * | 2016-12-02 | 2018-06-19 | 贵州詹阳动力重工有限公司 | The control device and control method of a kind of vehicle |
| CN108571488A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | Pulsed hydraulic pressure divides synchronous valve |
| CN108571488B (en) * | 2017-03-13 | 2024-01-23 | 上海融德机电工程设备有限公司 | Pulse type hydraulic partial pressure synchronous valve |
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