CN203201889U - Hydraulic drive system, dual-drive system comprising same and engineering machinery - Google Patents
Hydraulic drive system, dual-drive system comprising same and engineering machinery Download PDFInfo
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- CN203201889U CN203201889U CN 201320197740 CN201320197740U CN203201889U CN 203201889 U CN203201889 U CN 203201889U CN 201320197740 CN201320197740 CN 201320197740 CN 201320197740 U CN201320197740 U CN 201320197740U CN 203201889 U CN203201889 U CN 203201889U
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- 230000001105 regulatory effect Effects 0.000 claims description 10
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Abstract
The utility model provides a hydraulic drive system, contain its dual drive system, engineering machine tool. The hydraulic driving system comprises an oil supply pump (10) and a hydraulic motor (20) connected with the oil supply pump (10) through a hydraulic pipeline, and further comprises a torque adjusting mechanism (30) for adjusting the output torque of the hydraulic motor (20), wherein the torque adjusting mechanism (30) is connected to the oil supply pump (10) and/or the hydraulic motor (20). According to the utility model discloses a hydraulic drive system can make hydraulic drive system carry out quick timely adjustment to its output torque, guarantees the drive power phase-match between its output torque and the main drive system.
Description
Technical field
The utility model relates to engineering machinery field, in particular to a kind of hydraulic driving system, the dual drive system that comprises it, engineering machinery.
Background technique
Vehicle adopts mechanical drive mode to drive more at present, and its power transmission line is: motor is given each ransaxle by clutch, gearbox, transmission shaft, transfer case with transmission of power.For heavy vehicle, because its car load load is large, running resistance is also very large, in order to satisfy the power index of vehicle, especially the max. climb slope requirement of vehicle, only rely on Mechanical Driven then to need motor and the more ransaxle of larger specification, but heavy vehicle ransaxle quantity is a lot of usually, increases ransaxle quantity very difficult again.For addressing this problem, the parallel type hybrid dynamics that adopt drive more in the prior art, namely improve the driving force of vehicle as the mode of auxiliary power unit by increasing another power unit, so that auxiliary driving force to be provided when special operation condition (such as large climbing), when nominal situation travels, can close auxiliary power unit, only depend on the Mechanical Driven vehicle.
But mechanical drive mode can not effectively carry out accurately, control timely output torque, therefore causes the driving force between auxiliary drive unit and the main driver element to be complementary, and greatly reduces the working efficiency of two driver elements.
The model utility content
The utility model aims to provide a kind of hydraulic driving system, comprises its dual drive system, engineering machinery, hydraulic driving system is adjusted fast timely to its output torque, guaranteed that the driving force between its output torque and the main drive system is complementary.
To achieve these goals, according to an aspect of the present utility model, a kind of hydraulic driving system is provided, comprise oil feed pump and the oil hydraulic motor that is connected by hydraulic pipe line with oil feed pump, hydraulic driving system also comprises the torque adjustment mechanism of the output torque of regulator solution pressure motor, and torque adjustment mechanism is connected to oil feed pump and/or oil hydraulic motor.
Further, torque adjustment mechanism comprises controller and the controlling device that is connected with controller, and controller receives torque demand information, and according to the output torque of torque demand information regulating and controlling device regulator solution pressure motor.
Further, controlling device is connected to oil hydraulic motor, and oil hydraulic motor is variable displacement motor, and controlling device is the automatically controlled controlling device of the discharge capacity of controlled variable motor.
Further, oil feed pump is the enclosed variable displacement pump, and the control end of enclosed variable displacement pump is connected with the selector valve of control enclosed variable displacement pump commutation and the pressure shut-off valve of regulating the delivery pressure of enclosed variable displacement pump.
Further, hydraulic driving system is the Closed Hydraulic Driving system, be connected with feedback branch between the hydraulic pipe line at oil hydraulic motor two ends, have two one-way valves that oppositely arrange on the feedback branch, the outlet end of two one-way valves is relative, and the control end of pressure shut-off valve is connected on two feedback branches between the one-way valve.
Further, pressure shut-off valve is the electrohydraulic pressure control modulating valve that is connected to controller, and controlling device comprises the electrohydraulic pressure control modulating valve.
Further, hydraulic driving system also comprises the speed detector that is connected to oil hydraulic motor.
Further, the pressure cut off value of pressure shut-off valve is definite value.
According on the other hand of the present utility model, a kind of dual drive system is provided, comprise separate main drive system, assistant drive system and be connected the ransaxle that is connected with assistant drive system with main drive system, this assistant drive system is above-mentioned hydraulic driving system.
Provide a kind of engineering machinery more on the one hand according to of the present utility model, comprised hydraulic driving system, this hydraulic driving system is above-mentioned hydraulic driving system.
Use the technical solution of the utility model, hydraulic driving system comprises oil feed pump, oil hydraulic motor and torque adjustment mechanism.After determining needed output torque, torque adjustment mechanism can come oil hydraulic motor and/or oil feed pump are adjusted according to this output torque, thereby the output discharge capacity by changing oil hydraulic motor or the mode that changes the delivery pressure of oil feed pump realize the adjustment to the output torque of oil hydraulic motor, and it is finally met the demands.Because this programme directly regulates oil feed pump and/or oil hydraulic motor, therefore can adjust timely fast the output torque of hydraulic driving system, it is more accurate to control, working efficiency that can the Effective Raise system.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation according to the first embodiment's of the present utility model hydraulic driving system;
Fig. 2 shows the fundamental diagram according to the torque adjustment mechanism of the first embodiment's of the present utility model hydraulic driving system;
Fig. 3 shows the structural representation according to the second embodiment's of the present utility model hydraulic driving system; And
Fig. 4 shows the fundamental diagram according to the torque adjustment mechanism of the second embodiment's of the present utility model hydraulic driving system.
Embodiment
Hereinafter also describe in conjunction with the embodiments the utility model in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
In the ordinary course of things, the torque arithmetic formula as the oil hydraulic motor of moment of torsion output mechanism is in the hydraulic system:
Wherein T is moment of torsion, V
gBe motor displacement, Δ P is motor pressure reduction, η
mBe mechanical efficiency.
From above-mentioned formula as can be known the output torque of oil hydraulic motor decided by the discharge capacity of oil hydraulic motor and the pressure of hydraulic system, therefore as long as the discharge capacity of control oil hydraulic motor and/or the output torque that system pressure can be controlled oil hydraulic motor.The utility model mainly adopts three kinds of modes to carry out the control of the output torque of oil hydraulic motor, and first kind of way is that system pressure is constant, controls the output torque of oil hydraulic motor by control oil hydraulic motor discharge capacity; The second way is that the oil hydraulic motor discharge capacity is constant, controls the output torque of oil hydraulic motor by control system pressure; The third mode is for regulating to control simultaneously the output torque of oil hydraulic motor to system pressure and oil hydraulic motor.
As shown in Figures 1 to 4, according to embodiment of the present utility model, hydraulic driving system comprises oil feed pump 10 and the oil hydraulic motor 20 that is connected by hydraulic pipe line with oil feed pump 10, and oil feed pump 10, oil hydraulic motor 20 and hydraulic pipe line are connected to form closed circuit.Hydraulic driving system also comprises the torque adjustment mechanism 30 of the output torque of regulator solution pressure motor 20, torque adjustment mechanism 30 is connected to oil feed pump 10 and/or oil hydraulic motor 20, just can regulate the delivery pressure of oil feed pump 10 and the discharge capacity of oil hydraulic motor 20 by control torque controlling mechanism 30, thereby the output torque of regulator solution pressure motor 20 is to required size.
After determining needed output torque, torque adjustment mechanism 30 can come oil hydraulic motor 20 and/or oil feed pump 10 are adjusted according to this output torque, thereby the discharge capacity by changing oil hydraulic motor 20 or the mode that changes the delivery pressure of oil feed pump 10 realize the adjustment to the output torque of oil hydraulic motor 20, and it is finally met the demands.Because this programme directly regulates oil feed pump 10 and/or oil hydraulic motor 20, therefore can adjust timely fast the output torque of hydraulic driving system, it is more accurate to control, working efficiency that can the Effective Raise hydraulic system.
In conjunction with referring to illustrated in figures 1 and 2, hydraulic driving system according to the first embodiment of the present utility model, torque adjustment mechanism 30 comprises controller 40 and the controlling device that is connected with controller 40, controller 40 receives the torque demand information, and according to the output torque of torque demand information regulating and controlling device regulator solution pressure motor 20.The torque demand information that this controller 40 receives can be to come from other mechanism to calculate gained, it also can be a torque value that in controller 40, presets, 40 pairs of these moments of torsion of controller calculate, and convert it to electrical signal or other signal that controlling device can be identified, then this signal is passed to controlling device, controlling device is adjusted the discharge capacity of oil hydraulic motor 20, made it reach required output torque.
Certainly, in other embodiments, torque adjustment mechanism 30 also can be manual, when adjusting, can manually operate torque adjustment mechanism 30 by operator, realizes the adjustment to the discharge capacity of oil hydraulic motor 20.
In the present embodiment, oil hydraulic motor 20 is variable displacement motor, more specifically, is double-action variable displacement motor, and controlling device is the automatically controlled controlling device 31 of the discharge capacity of this variable displacement motor of control, and this automatically controlled controlling device 31 for example is automatically controlled adjusting color controls.
Preferably, the oil feed pump 10 in the present embodiment is the enclosed variable displacement pump, and the control end of this enclosed variable displacement pump is connected with the selector valve 11 of control enclosed variable displacement pump commutation and controls the pressure shut-off valve 32 of the delivery pressure of this enclosed variable displacement pump.Selector valve 11 herein is specially three position four-way electromagnetic valve, can certainly replace with other selector valve this selector valve, and such as pilot operated directional control valve etc., the Electromagnetic Control end of this three position four-way electromagnetic valve is connected to controller 40.Selector valve 11 and pressure shut-off valve 32 are connected to a control oil sources jointly, can control the commutation of three position four-way electromagnetic valve by this control oil sources.Pressure shut-off valve 32 herein is the constant spring pressure shut-off valve of cracking pressure.Between the hydraulic pipe line at oil hydraulic motor 20 two ends, be connected with feedback branch 50, have two one-way valves 51 that oppositely arrange on the feedback branch 50, the outlet end of two one-way valves 51 is relative, and the control end of pressure shut-off valve 32 is connected on two feedback branches 50 between the one-way valve 51.The device for changing displacement of enclosed variable displacement pump is controlled by three position four-way electromagnetic valve, and then the pressure oil outbound course of control oil pump, the power of device for changing displacement comes from the control oil sources, two one-way valves 51 can feed back to the delivery pressure of enclosed variable displacement pump the feedback port of pressure shut-off valve 32, because the delivery pressure of enclosed variable displacement pump equals the spring chamber pressure predefined value of pressure shut-off valve 32, so the pressure of enclosed variable displacement pump output is constant.
Preferably, the hydraulic driving system of the present embodiment also comprises at least one built-in or slippage pump of external, a flushing valve, can also comprise a speed detector that is connected to oil hydraulic motor 20, this speed detector can detect the rotating speed of oil hydraulic motor 20, prevent its hypervelocity, make the work of hydraulic driving system more safe and reliable.
Certainly, for 3-position 4-way solenoid directional control valve and automatically controlled controlling device 31, can share same controller, also can control respectively by different controllers.
When hydraulic driving system is worked, can control by controller 40 working position of three position four-way electromagnetic valve, thus the high pressure oil outbound course of control enclosed variable displacement pump, and then the sense of rotation of control oil hydraulic motor 20, the driving vehicle advances or retreats.Controller 40 simultaneously can from other system for example main drive system receive torque demand information, and through calculating, send instruction to automatically controlled controlling device 31, then by the displacement size of automatically controlled controlling device 31 regulator solution pressure motors 20, make the output torque of oil hydraulic motor 20 satisfy the required torque requirement.
In conjunction with referring to Fig. 3 and shown in Figure 4, according to the second embodiment of the present utility model, its basic structure with the first embodiment is identical, and difference is, in the present embodiment, oil hydraulic motor 20 is the constant motor of discharge capacity, and removed the automatically controlled controlling device 31 of control oil hydraulic motor 20, simultaneously, in the present embodiment, pressure shut-off valve 32 is for being connected to the electrohydraulic pressure control modulating valve of controller 40, and controlling device comprises this electrohydraulic pressure control modulating valve.Because the cracking pressure of electrohydraulic pressure control modulating valve can be passed through controller 40 regulating and controlling, therefore, enclosed variable pump delivery changes automatically, equal the electrohydraulic pressure control setting of pressure shut-off valve 32 with the delivery pressure that guarantees the enclosed variable displacement pump, because this electrohydraulic pressure control setting is adjustable, therefore, the delivery pressure of enclosed variable displacement pump also correspondingly can be adjusted, correspondingly, can realize adjustment to the output torque of oil hydraulic motor 20 by the delivery pressure of adjusting the enclosed variable displacement pump.
In the present embodiment, employing be the control mode of above-mentioned the second oil hydraulic motor output torque, namely the discharge capacity of oil hydraulic motor 20 is constant, controls the output torque of oil hydraulic motor by control system pressure.
When hydraulic driving system is worked, can control by controller 40 working position of three position four-way electromagnetic valve, thus the high pressure oil outbound course of control enclosed variable displacement pump, and then the sense of rotation of control oil hydraulic motor 20, the driving vehicle advances or retreats.Controller 40 simultaneously can from other system for example main drive system receive torque demand information, and through calculating, send instruction to the electrohydraulic pressure control modulating valve, then regulate the delivery pressure of enclosed variable displacement pump by the electrohydraulic pressure control modulating valve, finally make the output torque of oil hydraulic motor 20 satisfy the required torque requirement.
Among two above-mentioned embodiments, the pressure of hydraulic system is constant among first embodiment, and controller 40 receives torque demand information, only need send the displacement size of instruction control oil hydraulic motor 20, can control driving torque; Among second embodiment, the discharge capacity of oil hydraulic motor 20 is constant, controller 40 receives torque demand information, only need send the output oil pressure variation of instruction control enclosed variable displacement pump with the size of regulating system pressure, and the driving torque that can control oil hydraulic motor 20 outputs changes with system pressure.Two 40 of embodiment's middle controllers need control three position four-way electromagnetic valve two ends and another one parameter to get final product, and are therefore simple in structure, easy to adjust; Realize because the flow of hydraulic system changes discharge capacity automatically by the enclosed variable displacement pump, therefore can accomplish to provide as required, in certain vehicle speed range, realize the vehicle stepless change.
In a unshowned embodiment, also can adopt the third output torque control mode, being about to above-mentioned two kinds of control modes combines, can regulate the displacement size of enclosed variable displacement pump and the output discharge capacity of oil hydraulic motor 20 simultaneously, to realize that the output torque of oil hydraulic motor 20 is carried out regulating and controlling.In this embodiment, automatically controlled controlling device 31 and electrohydraulic pressure control modulating valve can be connected to controller 40 jointly, then respectively automatically controlled controlling device 31 and electrohydraulic pressure control modulating valve are controlled by controller 40, the output torque of oil hydraulic motor is finally satisfied the demands.
Each above-mentioned control mode is not limited in the closed system, also can be applied in the open system.
In the enforcement of two independent driving system schemes, the driving force of two systems coupling will be very crucial.Wherein whole drive system should be take main drive system as main, and assistant drive system should be followed the variation of main driver element relevant parameter and be made variation.And according to embodiment of the present utility model, dual drive system comprises the main drive system that is arranged in parallel, assistant drive system and be connected the ransaxle that is connected with assistant drive system with main drive system, this assistant drive system is above-mentioned hydraulic driving system, the controller 40 of hydraulic driving system is connected to main drive system, receive the torque information of main drive system, and calculate the moment of torsion of the required output of hydraulic driving system according to this torque information, then according to this required torque oil feed pump 10 and/or oil hydraulic motor 20 are controlled, the output torque of oil hydraulic motor 20 is finally met the demands, thereby assistant drive system and main drive system are complementary, and realization is real-time to the hydraulic system output torque, fast, adjust accurately.
Dual drive system comprises main drive system and assistant drive system, and take main drive system as main, assistant drive system is according to main driver element relevant parameter, the moment of torsion that output and main drive system are complementary.According to embodiment of the present utility model, dual drive system comprises main drive system, assistant drive system and signals collecting and the delivery system that is arranged in parallel.Wherein main drive system is that common mechanical drive mode drives, and assistant drive system namely adopts the hydraulic driving system among the utility model embodiment.Signals collecting and delivery system are responsible for the characteristic parameter (torque information) of Real-time Collection master drive system, and pass to controller 40 in the assistant drive system, controller 40 reception information are also calculated the moment of torsion of the required output of assistant drive system, and be refined to controlled quentity controlled variable for pressure and/or the oil hydraulic motor 20 of oil feed pump 10, and then realize the coupling of assistant drive system and main drive system.
According to embodiment of the present utility model, engineering machinery comprises hydraulic driving system, and this hydraulic driving system is above-mentioned hydraulic driving system.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect: hydraulic driving system comprises oil feed pump, oil hydraulic motor and torque adjustment mechanism.After determining needed output torque, torque adjustment mechanism can come oil hydraulic motor and/or oil feed pump are adjusted according to this output torque, thereby the output discharge capacity by changing oil hydraulic motor or the mode that changes the delivery pressure of oil feed pump realize the adjustment to the output torque of oil hydraulic motor, and it is finally met the demands.Because this programme directly regulates oil feed pump and/or oil hydraulic motor, therefore can adjust timely fast the output torque of hydraulic driving system, it is more accurate to control, working efficiency that can the Effective Raise system.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. hydraulic driving system, it is characterized in that, comprise oil feed pump (10) and the oil hydraulic motor (20) that is connected by hydraulic pipe line with described oil feed pump (10), described hydraulic driving system also comprises the torque adjustment mechanism (30) of the output torque of regulating described oil hydraulic motor (20), and described torque adjustment mechanism (30) is connected to described oil feed pump (10) and/or described oil hydraulic motor (20).
2. hydraulic driving system according to claim 1, it is characterized in that, described torque adjustment mechanism (30) comprises controller (40) and the controlling device that is connected with described controller (40), described controller (40) receives torque demand information, and controls the output torque that described controlling device is regulated described oil hydraulic motor (20) according to described torque demand information.
3. hydraulic driving system according to claim 2, it is characterized in that, described controlling device is connected to described oil hydraulic motor (20), and described oil hydraulic motor (20) is variable displacement motor, and described controlling device is the automatically controlled controlling device (31) of the discharge capacity of the described variable displacement motor of control.
4. according to claim 2 or 3 described hydraulic driving systems, it is characterized in that, described oil feed pump (10) is the enclosed variable displacement pump, and the control end of described enclosed variable displacement pump is connected with the selector valve (11) of the described enclosed variable displacement pump commutation of control and the pressure shut-off valve (32) of regulating the delivery pressure of described enclosed variable displacement pump.
5. hydraulic driving system according to claim 4, it is characterized in that, described hydraulic driving system is the Closed Hydraulic Driving system, be connected with feedback branch (50) between the hydraulic pipe line at described oil hydraulic motor (20) two ends, have two one-way valves (51) that oppositely arrange on the described feedback branch (50), the outlet end of two described one-way valves (51) is relative, and the control end of described pressure shut-off valve (32) is connected on the described feedback branch (50) between two described one-way valves (51).
6. hydraulic driving system according to claim 5 is characterized in that, described pressure shut-off valve (32) is for being connected to the electrohydraulic pressure control modulating valve of described controller (40), and described controlling device comprises described electrohydraulic pressure control modulating valve.
7. each described hydraulic driving system in 3 according to claim 1 is characterized in that, described hydraulic driving system also comprises the speed detector that is connected to described oil hydraulic motor (20).
8. hydraulic driving system according to claim 4 is characterized in that, the pressure cut off value of described pressure shut-off valve (32) is definite value.
9. dual drive system, comprise separate main drive system, assistant drive system and with described main drive system be connected assistant drive system and drive the ransaxle that is connected, it is characterized in that, described assistant drive system is each described hydraulic driving system in the claim 1 to 8.
10. an engineering machinery comprises hydraulic driving system, it is characterized in that, described hydraulic driving system is each described hydraulic driving system in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320197740 CN203201889U (en) | 2013-04-18 | 2013-04-18 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320197740 CN203201889U (en) | 2013-04-18 | 2013-04-18 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
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| CN203201889U true CN203201889U (en) | 2013-09-18 |
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| CN 201320197740 Expired - Lifetime CN203201889U (en) | 2013-04-18 | 2013-04-18 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195763A (en) * | 2013-04-18 | 2013-07-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
-
2013
- 2013-04-18 CN CN 201320197740 patent/CN203201889U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195763A (en) * | 2013-04-18 | 2013-07-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
| CN103195763B (en) * | 2013-04-18 | 2016-08-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
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Granted publication date: 20130918 Effective date of abandoning: 20160810 |
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