CN105402178A - Closed type hydraulic system and vehicle comprising same - Google Patents
Closed type hydraulic system and vehicle comprising same Download PDFInfo
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- CN105402178A CN105402178A CN201511025970.8A CN201511025970A CN105402178A CN 105402178 A CN105402178 A CN 105402178A CN 201511025970 A CN201511025970 A CN 201511025970A CN 105402178 A CN105402178 A CN 105402178A
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
Abstract
The invention discloses a closed type hydraulic system and a vehicle comprising same. The closed type hydraulic system comprises an oil storage container, a power device, a first motor, a second motor and a control device, wherein the oil storage container is used for storing hydraulic oil; the power device is used for supplying power to the closed type hydraulic system; an inlet of the power device is connected to the oil storage container; the power device comprises a main oil pump; the main oil pump is a two-way variable pump with a first oil opening and a second oil opening; the control device is arranged between the main oil pump and the first motor as well as the second motor so as to enable the main oil pump to be connected with one of the first motor and the second motor and be disconnected with the other of the first motor and the second motor. According to the closed type hydraulic system, the control device is arranged and is used for enabling the main oil pump to control the first motor and the second motor to work in a time-shared control manner, so that one pump can control a plurality of motor to perform different operations; the number of components is reduced, so that the closed type hydraulic system is simple in structure and low in cost.
Description
Technical field
The present invention relates to technical field of engineering machinery, especially relate to a kind of closed type hydraulic system and the vehicle containing it.
Background technique
In correlation technique, closed type hydraulic system is used in the machinery such as vehicle, handling machinery, ship winch, papermaking and weaving, has that system effectiveness is high, compact structure, stationarity are good.But in engineering machinery application, the conventional single pump of the many employings of closed type hydraulic system controls single motor, and the quantity of motor equals the quantity of pump, and this just causes the element of closed type hydraulic system with high costs.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the present invention proposes a kind of closed type hydraulic system, and this closed type hydraulic system can realize single pump and control multi-motor, and structure is simple.
The invention allows for a kind of vehicle with above-mentioned closed type hydraulic system.
The closed type hydraulic system of embodiment according to a first aspect of the present invention, comprising: oil vessel, and described oil vessel is used for storage liquid force feed; For providing the power plant of power for described closed type hydraulic system, the entrance of described power plant is connected with described oil vessel, and described power plant comprise main oil pump, and described main oil pump is two-way variable displacement pump and has the first hydraulic fluid port and the second hydraulic fluid port; First motor and the second motor; Control gear, described control gear is located at described main oil pump, between described first motor and described second motor to make a conducting in described main oil pump and described first motor and described second motor and another blocks.
According to the closed type hydraulic system of the embodiment of the present invention, by the control gear arranged, main oil pump Time-sharing control first motor and the second motor operations can be made, namely can realize single pump and control multi-motor to perform different work, decrease the quantity of element, such that the structure of this closed type hydraulic system is simple, cost is low.
According to some embodiments of the present invention, described first motor has the first port and the second port, described second motor has the 3rd port and the 4th port, wherein said control gear comprises: cartridge valve group, described cartridge valve group comprises first to fourth cartridge valve, described first to fourth cartridge valve includes cartridge valve import, cartridge valve outlet and cartridge valve controlled donsole, the cartridge valve import of wherein said first cartridge valve is connected with the first hydraulic fluid port of described main oil pump with the described cartridge valve import of the 3rd cartridge valve, the cartridge valve import of described second cartridge valve is connected with the second hydraulic fluid port of described main oil pump with the described cartridge valve import of the 4th cartridge valve, the cartridge valve outlet of described first to fourth cartridge valve is connected with described first to fourth port respectively, COMM communication, described COMM communication is connected between described main oil pump and described cartridge valve group, described COMM communication controls described hydraulic oil and enters into the cartridge valve controlled donsole of described first cartridge valve and the cartridge valve controlled donsole of described second cartridge valve to cut off described main oil pump and described first motor, or described COMM communication controls described hydraulic oil and enters into the cartridge valve controlled donsole of described 3rd cartridge valve and the cartridge valve controlled donsole of described 4th cartridge valve to cut off described main oil pump and described second motor.
Further, described COMM communication comprises: shuttle valve, and described shuttle valve has the first import, the second import and outlet, and described first import is connected with the first hydraulic fluid port of described main oil pump, and described second import is connected with the second hydraulic fluid port of described main oil pump; Four-way valve, described four-way valve has first to fourth valve port, described first valve port is connected with the outlet of described shuttle valve, described second valve port is connected with described oil vessel, described 3rd valve port is connected with the cartridge valve controlled donsole of described second cartridge valve with the cartridge valve controlled donsole of described first cartridge valve, and described 4th valve port is connected with the cartridge valve controlled donsole of described 4th cartridge valve with the cartridge valve controlled donsole of described 3rd cartridge valve.
Alternatively, described four-way valve is two-way electric control three position four-way directional control valve.
According to some embodiments of the present invention, described power plant also comprise: slippage pump, the access of described slippage pump becomes the entrance of described power plant, described repairing delivery side of pump is connected with the second hydraulic fluid port with the first hydraulic fluid port of described main oil pump with the second one-way valve respectively respectively by the first one-way valve, and described first one-way valve is configured to by described repairing delivery side of pump to described first hydraulic fluid port one-way conduction, described second one-way valve is configured to by described repairing delivery side of pump to described second hydraulic fluid port one-way conduction.
According to some embodiments of the present invention, described closed type hydraulic system also comprises flushing valve, and described flushing valve is located between described power plant and described oil vessel part high-temperature liquid force feed to be guided in described oil vessel.
Further, described closed type hydraulic system also comprises relief valve, and described relief valve to be located between described flushing valve and described oil vessel and to be suitable for respectively being communicated with described oil vessel with described flushing valve.
Alternatively, described flushing valve is three-way diverter valve, and three of described three-way diverter valve commutation valve ports are connected with described relief valve with the first hydraulic fluid port of described main oil pump, the second hydraulic fluid port respectively.
The vehicle of embodiment according to a second aspect of the present invention, comprises the closed type hydraulic system according to the above-mentioned first aspect embodiment of the present invention.
According to the vehicle of the embodiment of the present invention, by arranging above-mentioned closed type hydraulic system, being convenient to switch the working oil path of vehicle, realizing the actuator that single pump Time-sharing control is different, and can simplify vehicle structure, reduce costs.
Alternatively, described vehicle is tunnel precutting trough vehicle, and described tunnel precutting trough vehicle comprises walking arrangement and chain cutter cutting equipment, and described first motor is for driving described walking arrangement, and described second motor is for driving described chain cutter cutting equipment.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic diagram of the closed type hydraulic system according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the power plant of closed type hydraulic system according to the embodiment of the present invention;
Fig. 3 is the schematic diagram of the cartridge valve group of closed type hydraulic system according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the COMM communication of closed type hydraulic system according to the embodiment of the present invention.
Reference character:
Closed type hydraulic system 100,
Oil vessel 10,
Power plant 200, main oil pump 20, the first hydraulic fluid port 201, second hydraulic fluid port 202, slippage pump 30, import 301, outlet the 302, first one-way valve 21, second one-way valve 22, motor 23,
First motor 4, first port 41, second port 42, second motor the 5, three port the 51, four port 52,
Cartridge valve group 300, first cartridge valve 40, cartridge valve import 401, cartridge valve outlet 402, cartridge valve controlled donsole 403, second cartridge valve 50, cartridge valve import 501, cartridge valve outlet 502, cartridge valve controlled donsole 503,3rd cartridge valve 60, cartridge valve import 601, cartridge valve outlet 602, cartridge valve controlled donsole the 603, four cartridge valve 70, cartridge valve import 701, cartridge valve outlet 702, cartridge valve controlled donsole 703
COMM communication 400, shuttle valve 80, the first import 801, second import 802, outlet 803, four-way valve 90, the first valve port 901, second valve port the 902, three valve port the 903, four valve port 904,
Flushing valve 6, relief valve 7.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Below with reference to Fig. 1-Fig. 4, the closed type hydraulic system 100 according to the embodiment of the present invention is described.
As Figure 1-Figure 4, according to the closed type hydraulic system 100 of the embodiment of the present invention, comprise oil vessel 10, power plant 200, first motor 4, second motor 5 and control gear.
Specifically, oil vessel 10 is for storage liquid force feed, and power plant 200 are for providing power for closed type hydraulic system 100.The entrance of power plant 200 is connected with oil vessel 10, and thus, the hydraulic oil in oil vessel 10 can enter power plant 200 by the entrance of power plant 200, thus can provide hydraulic oil for closed type hydraulic system 100.Power plant 200 comprise main oil pump 20, and main oil pump 20 is two-way variable displacement pump and has the first hydraulic fluid port 201 and the second hydraulic fluid port 202.In other words, the first hydraulic fluid port 201 of main oil pump 20 both can also can as return opening as oil outlet, and the second hydraulic fluid port 202 both can also can as return opening as oil outlet.When the first hydraulic fluid port 201 is as oil outlet, then the second hydraulic fluid port 202 is as return opening; When the second hydraulic fluid port 202 is as oil outlet, then the first hydraulic fluid port 201 is as return opening.
First motor 4 and the second motor 5 can drive different actuators to perform different work respectively.Control gear is located between main oil pump 20, first motor 4 and the second motor 5 to make a conducting in main oil pump 20 and the first motor 4 and the second motor 5 and another blocks.That is, by the control switching effect of control gear, the motivational drive of main oil pump 20 can be made to act between the first motor 4 and the second motor 5 and to switch.Oil circuit between main oil pump 20 with the first motor 4 be communicated with and and oil circuit between the second motor 5 blocks time, now main oil pump 20 can control the first motor 4 and drive its corresponding actuator work, and the second motor 5 is in outage state; Oil circuit between main oil pump 20 with the second motor 5 be communicated with and and oil circuit between the first motor 4 blocks time, now main oil pump 20 can control the second motor 5 and drive its corresponding actuator work, and the first motor 4 is in outage state.
Thus; by control gear, the control of oil circuit is switched; main oil pump 20 can be realized control in the first motor 4 and the second motor 5 one work another is shut down; thus just can control multiple motor to perform different work by single pump; thus can the quantity of element in minimizing system; can reduce costs, and the structure of this closed type hydraulic system 100 is simple.
According to the closed type hydraulic system 100 of the embodiment of the present invention, by the control gear arranged, main oil pump 20 Time-sharing control first motor 4 and the second motor 5 can be made to work, namely can realize single pump and control multi-motor to perform different work, decrease the quantity of element, such that the structure of this closed type hydraulic system 100 is simple, cost is low.
For Fig. 1-Fig. 4, closed type hydraulic system 100 is according to an embodiment of the invention described below.Be worth understanding, following description is exemplary description, and can not be interpreted as limitation of the present invention.
As Figure 1-Figure 4, closed type hydraulic system 100 comprises oil vessel 10, power plant 200, first motor 4, second motor 5, control gear, flushing valve 6 and relief valve 7.
Specifically, as depicted in figs. 1 and 2, power plant 200 comprise main oil pump 20, slippage pump 30 and motor 23, and motor 23 drives main oil pump 20 to work.Main oil pump 20 is two-way variable displacement pump and has the first hydraulic fluid port 201 and the second hydraulic fluid port 202, the import 301 of slippage pump 30 is configured to the entrance of power plant 200, the entrance of power plant 200 is connected with oil vessel 10, and namely the import 301 of slippage pump 30 is connected with oil vessel 10.Control gear is located between main oil pump 20, first motor 4 and the second motor 5 to make a conducting in main oil pump 20 and the first motor 4 and the second motor 5 and another blocks.Wherein, control gear comprises cartridge valve group 300 and COMM communication 400, first motor 4 has the first port 41 and the second port 42, second motor 5 has the 3rd port 51 and the 4th port 52.
First port 41 of the first motor 4 can as filler opening, also can as oil outlet; Second port 42 of the first motor 4 can as filler opening, also can as oil outlet.When the first port 41 of the first motor 4 is as filler opening, the second port 42 of the first motor 4 is as oil outlet; When the second port 42 of the first motor 4 is as filler opening, the first port 41 of the first motor 4 is as oil outlet.Similarly, when the 3rd port 51 of the second motor 5 is as filler opening, the 4th port 52 of the second motor 5 is as oil outlet; When the 4th port 52 of the second motor 5 is as filler opening, the 3rd port 51 of the second motor 5 is as oil outlet.
With reference to Fig. 3 composition graphs 1, cartridge valve group 300 comprises the first cartridge valve 40, second cartridge valve 50, the 3rd cartridge valve 60 and the 4th cartridge valve 70, first cartridge valve 40, second cartridge valve 50, the 3rd cartridge valve 60 and the 4th cartridge valve 70 and includes cartridge valve import, cartridge valve outlet and cartridge valve controlled donsole.What need here to illustrate is, the cartridge valve import 701 of the cartridge valve import 501 of cartridge valve import 401, second cartridge valve 50 of the first cartridge valve 40, the cartridge valve import 601 of the 3rd cartridge valve 60 and the 4th cartridge valve 70 all can as filler opening, also can as oil outlet; The cartridge valve outlet 602 of cartridge valve outlet the 502, the 3rd cartridge valve 60 of cartridge valve outlet 402, second cartridge valve 50 of the first cartridge valve 40 and the cartridge valve outlet 702 of the 4th cartridge valve 70 all can as oil outlets, also can as filler opening.Alternatively, the first cartridge valve 40, second cartridge valve 50, the 3rd cartridge valve 60 and the 4th cartridge valve 70 can be two-way plug-in valve.
Wherein, the cartridge valve import 401 of the first cartridge valve 40 is connected with the first hydraulic fluid port 201 of main oil pump 20 with the cartridge valve import 601 of the 3rd cartridge valve 60, and the cartridge valve import 501 of the second cartridge valve 50 is connected with the second hydraulic fluid port 202 of main oil pump 20 with the cartridge valve import 701 of the 4th cartridge valve 70.The cartridge valve outlet of first to fourth cartridge valve is connected with first to fourth port respectively.In other words, the cartridge valve outlet 402 of the first cartridge valve 40 is connected with the first port 41 of the first motor 4, the cartridge valve outlet 502 of the second cartridge valve 50 is connected with the second port 42 of the first motor 4, the cartridge valve outlet 602 of the 3rd cartridge valve 60 is connected with the 3rd port 51 of the second motor 5, and the cartridge valve outlet 702 of the 4th cartridge valve 70 is connected with the 4th port 52 of the second motor 5.
As shown in Figure 1, COMM communication 400 is connected between main oil pump 20 and cartridge valve group 300, COMM communication 400 hydraulic control oil enters into the cartridge valve controlled donsole 403 of the first cartridge valve 40 and the cartridge valve controlled donsole 503 of the second cartridge valve 50 to cut off main oil pump 20 and the first motor 4, or the oily cartridge valve controlled donsole 603 of the 3rd cartridge valve 60 and the cartridge valve controlled donsole 703 of the 4th cartridge valve 70 of entering into of COMM communication 400 hydraulic control is to cut off main oil pump 20 and the second motor 5.Briefly, be exactly can by the switching controls of COMM communication 400, the oil circuit between main oil pump 20 and the first motor 4 can be made to cut off, or the oil circuit between main oil pump 20 and the second motor 5 also can be made to cut off, namely can make main oil pump 20 and between the first motor 4 and the second motor 5, carry out the switching of oil circuit, thus single pump time-sharing multiplex can be realized.
Specifically, if COMM communication 400 cuts off the oil circuit between main oil pump 20 and the second motor 5, the oil circuit conducting now between main oil pump 20 and the first motor 4.When the first hydraulic fluid port 201 of main oil pump 20 is as oil outlet, when second hydraulic fluid port 202 is as return opening, the hydraulic oil of output can be delivered to the first motor 4 by the first cartridge valve 40 by main oil pump 20, and flow back into main oil pump 20 by the second cartridge valve 50, thus main oil pump 20 can control the first motor 4 rotates forward to perform the first work; When the second hydraulic fluid port 202 of main oil pump 20 is as oil outlet, when first hydraulic fluid port 201 is as return opening, the hydraulic oil of output can be delivered to the first motor 4 by the second cartridge valve 50 by main oil pump 20, and flow back into main oil pump 20 by the first cartridge valve 40, thus main oil pump 20 can control the first motor 4 reverses second work that performs (second work identical with the content that first works but direction is contrary).
If COMM communication 400 cuts off the oil circuit between main oil pump 20 and the first motor 4, the oil circuit conducting now between main oil pump 20 and the second motor 5.When the first hydraulic fluid port 201 of main oil pump 20 is as oil outlet, when second hydraulic fluid port 202 is as return opening, the hydraulic oil of output can be delivered to the second motor 5 by the 3rd cartridge valve 60 by main oil pump 20, and flow back into main oil pump 20 by the 4th cartridge valve 70, thus main oil pump 20 can control the second motor 5 rotates forward to perform the 3rd work; When the second hydraulic fluid port 202 of main oil pump 20 is as oil outlet, when first hydraulic fluid port 201 is as return opening, the hydraulic oil of output can be delivered to the second motor 5 by the 4th cartridge valve 70 by main oil pump 20, and flow back into main oil pump 20 by the 3rd cartridge valve 60, thus main oil pump 20 can control the second motor 5 reverses to perform the 4th work (the 4th work is identical with the content that the 3rd works but direction is contrary).
Further, with reference to Fig. 4 composition graphs 1, COMM communication 400 comprises shuttle valve 80 and four-way valve 90.Shuttle valve 80 has the first import 801, second import 802 and outlet the 803, first import 801 is connected with the first hydraulic fluid port 201 of main oil pump 20, and the second import 802 is connected with the second hydraulic fluid port 202 of main oil pump 20.Four-way valve 90 has first to fourth valve port, first valve port 901 is connected with the outlet 803 of shuttle valve 80, second valve port 902 is connected with oil vessel 10,3rd valve port 903 is connected with the cartridge valve controlled donsole 503 of the second cartridge valve 50 with the cartridge valve controlled donsole 403 of the first cartridge valve 40, and the 4th valve port 904 is connected with the cartridge valve controlled donsole 703 of the 4th cartridge valve 70 with the cartridge valve controlled donsole 603 of the 3rd cartridge valve 60.Thus, main oil pump 20 can use in a part of for the hydraulic oil exported the first import 801 by shuttle valve 80 or the second import 802 inflow control device for oil circuit control, flows into the hydraulic oil of shuttle valve 80 and is flowed out by the outlet 803 of shuttle valve 80.Alternatively, four-way valve 90 can be two-way electric control three position four-way directional control valve.
Need here to illustrate, when the first hydraulic fluid port 201 of main oil pump 20 is as oil outlet, when the second hydraulic fluid port 202 is as return opening, the hydraulic oil part that main oil pump 20 exports is by the first import 801 inflow control device of shuttle valve 80; When the second hydraulic fluid port 202 of main oil pump 20 is as oil outlet, when the first hydraulic fluid port 201 is as return opening, the hydraulic oil part that main oil pump 20 exports is by the second import 802 inflow control device of shuttle valve 80.
When the first valve port 901 of four-way valve 90 be communicated with the 4th valve port 904, the second valve port 902 be communicated with the 3rd valve port 903 time; the hydraulic oil flowed out from shuttle valve 80 flows out four-way valve 90 by the first valve port 901 of four-way valve 90, the 4th valve port 904 successively; and a point two-way flows into the cartridge valve controlled donsole 603 of the 3rd cartridge valve 60 and the cartridge valve controlled donsole 703 of the 4th cartridge valve 70 respectively; oil circuit now between main oil pump 20 and the second motor 5 cuts off, and the second motor 5 is in outage state.And the hydraulic oil in the cartridge valve controlled donsole 403 of the first cartridge valve 40 and the cartridge valve controlled donsole 503 of the second cartridge valve 50 flows back into oil vessel 10 through the 3rd valve port 903, second valve port 902 of four-way valve 90 successively, oil circuit conducting now between main oil pump 20 and the first motor 4, main oil pump 20 can control the first motor 4 and work.
When the first valve port 901 of four-way valve 90 be communicated with the 3rd valve port 903, the second valve port 902 be communicated with the 4th valve port 904 time; the hydraulic oil flowed out from shuttle valve 80 flows out four-way valve 90 by the first valve port 901 of four-way valve 90, the 3rd valve port 903 successively; and a point two-way flows into the cartridge valve controlled donsole 403 of the first cartridge valve 40 and the cartridge valve controlled donsole 503 of the second cartridge valve 50 respectively; oil circuit now between main oil pump 20 and the first motor 4 cuts off, and the first motor 4 is in outage state.And the hydraulic oil in the cartridge valve controlled donsole 703 of the cartridge valve controlled donsole 603 of the 3rd cartridge valve 60 and the 4th cartridge valve 70 flows back into oil vessel 10 through the 4th valve port 904, second valve port 902 of four-way valve 90 successively, oil circuit conducting now between main oil pump 20 and the second motor 5, main oil pump 20 can control the second motor 5 and work.
Thus, can switch from the oil circuit between different actuator by the main oil pump 20 controlled by above-mentioned COMM communication 400 in this closed type hydraulic system 100, and this COMM communication 400 element is few, structure simple, be easy to realization.
In addition, with reference to Fig. 2 composition graphs 1, the outlet of slippage pump 30 is connected with the second hydraulic fluid port 202 with the first hydraulic fluid port 201 of main oil pump 20 with the second one-way valve 22 respectively respectively by the first one-way valve 21, and the first one-way valve 21 is configured to by the outlet 302 of slippage pump 30 to the first hydraulic fluid port 201 one-way conduction, the second one-way valve 22 is configured to by the outlet 302 of slippage pump 30 to the second hydraulic fluid port 202 one-way conduction.When the hydraulic oil in this closed type hydraulic system 100 is not enough, slippage pump 30 can be opened and by the first one-way valve 21 or the second one-way valve 22 to replenisher force feed in oil circuit.
Flushing valve 6 is located to guide in oil vessel 10 by part high-temperature liquid force feed between power plant 200 and oil vessel 10, and relief valve 7 to be located between flushing valve 6 and oil vessel 10 and to be suitable for respectively being communicated with oil vessel 10 with flushing valve 6.The effect of relief valve 7 is the minimum oil compensation pressure maintaining closed type hydraulic system 100, and the fluid in guarantee system is sufficient.Alternatively, flushing valve 6 can be three-way diverter valve, and three commutation valve ports of three-way diverter valve are connected with relief valve 7 with the first hydraulic fluid port 201, second hydraulic fluid port 202 of main oil pump 20 respectively.Thus, the part high-temperature liquid force feed in closed type hydraulic system 100 can flow back to oil vessel 10 by flushing valve 6 and relief valve 7, thus can dispel the heat to the hydraulic oil in closed type hydraulic system 100.For the working principle of flushing valve 6 and relief valve 7 known to those of ordinary skill in the art, be no longer described in detail here.
Above-mentioned closed type hydraulic system 100 can be applied in vehicle (such as, tunnel precutting trough vehicle), be convenient to thus switch the working oil path of vehicle, realize the actuator that single pump Time-sharing control is different, and can simplify vehicle structure, reduce costs.
Be that a concrete example describes working principle according to the closed type hydraulic system 100 of the embodiment of the present invention and working procedure with the working procedure of tunnel precutting trough vehicle below.
Specifically, tunnel precutting trough vehicle comprises walking arrangement and chain cutter cutting equipment, and walking arrangement can make tunnel precutting trough vehicle to run, and chain cutter cutting equipment can make tunnel precutting trough vehicle carry out cutting work.When tunnel precutting trough vehicle to run is to tunnel front, the chain cutter cutting equipment that tunnel precutting trough vehicle is installed is utilized to cut tunnel and cut out the narrow groove with certain thickness and the degree of depth.From the working procedure of above-mentioned tunnel precutting trough vehicle, work when equipment walking is different with the cutting of chain cutter.By utilizing closed type hydraulic system 100 of the present invention, main oil pump 20 can be made to control tunnel precutting trough vehicle and to walk and cutting work.
With reference to Fig. 1-Fig. 4, four-way valve 90 is two-way electric control three position four-way directional control valve, and the first motor 4 can drive walking arrangement to make tunnel precutting trough vehicle to run, and the second motor 5 can carry out cutting work to make tunnel precutting trough vehicle by chain cutter cutting equipment.
When the left position of four-way valve 90 obtains electric, the first valve port 901 of four-way valve 90 is communicated with the 4th valve port 904, the second valve port 902 is communicated with the 3rd valve port 903.The high pressure oil that main oil pump 20 exports arrives the cartridge valve controlled donsole 603 of the 3rd cartridge valve 60 and the cartridge valve controlled donsole 703 of the 4th cartridge valve 70 by shuttle valve 80, four-way valve 90 successively, and the hydraulic oil in the cartridge valve controlled donsole 503 of the cartridge valve controlled donsole 403 of the first cartridge valve 40 and the second cartridge valve 50 flows back into oil vessel 10 through four-way valve 90.Now, the oil circuit conducting between main oil pump 20 and the first motor 4 and oil circuit between main oil pump 20 and the second motor 5 cut off, and main oil pump 20 can control the first motor 4 actuating equipment walking work.
When the first hydraulic fluid port 201 of main oil pump 20 is as oil outlet, when second hydraulic fluid port 202 is as return opening, first cartridge valve 40 is opened by the high pressure oil that main oil pump 20 exports, high pressure oil flows into the first cartridge valve 40 and the first cartridge valves 40 are flowed out in cartridge valve outlet 402 through the first cartridge valve 40 through the cartridge valve import 401 of the first cartridge valve 40, then high pressure oil enters the first motor 4 and the second port 42 through the first motor 4 flows out through the first port 41 of the first motor 4, the hydraulic oil flowed out from the first motor 4 flows into the second cartridge valves 50 by the cartridge valve of the second cartridge valve 50 outlet 502 and cartridge valve import 501 through the second cartridge valve 50 is flowed out, finally flow back in oil vessel 10.Thus, the first motor 4 can be controlled by main oil pump 20 and drive tunnel precutting trough vehicle rollback.
When the second hydraulic fluid port 202 of main oil pump 20 is as oil outlet, when first hydraulic fluid port 201 is as return opening, second cartridge valve 50 is opened by the high pressure oil that main oil pump 20 exports, high pressure oil flows into the second cartridge valve 50 and cartridge valve outlet 502 through the second cartridge valve 50 is flowed out through the cartridge valve import 501 of the second cartridge valve 50, then high pressure oil enters the first motor 4 and the first port 41 through the first motor 4 flows out through the second port 42 of the first motor 4, the hydraulic oil flowed out from the first motor 4 flows into the first cartridge valves 40 by the cartridge valve of the first cartridge valve 40 outlet 402 and cartridge valve import 401 through the first cartridge valve 40 is flowed out, finally flow back in oil vessel 10.Thus, can control the first motor 4 by main oil pump 20 drives tunnel precutting trough vehicle to advance.
When the right position of four-way valve 90 obtains electric, the first valve port 901 of four-way valve 90 is communicated with the 3rd valve port 903, the second valve port 902 is communicated with the 4th valve port 904.The high pressure oil that main oil pump 20 exports arrives the cartridge valve controlled donsole 403 of the first cartridge valve 40 and the cartridge valve controlled donsole 503 of the second cartridge valve 50 by shuttle valve 80, four-way valve 90 successively, and the hydraulic oil in the cartridge valve controlled donsole 703 of the cartridge valve controlled donsole 603 of the 3rd cartridge valve 60 and the 4th cartridge valve 70 flows back into oil vessel 10 through four-way valve 90.Now, the oil circuit conducting between main oil pump 20 and the second motor 5 and oil circuit between main oil pump 20 and the first motor 4 cut off, and main oil pump 20 can control the second motor 5 and perform chain cutter cutting work.
When the first hydraulic fluid port 201 of main oil pump 20 is as oil outlet, when second hydraulic fluid port 202 is as return opening, 3rd cartridge valve 60 is opened by the high pressure oil that main oil pump 20 exports, high pressure oil flows into the 3rd cartridge valve 60 and the 3rd cartridge valves 60 are flowed out in cartridge valve outlet 602 through the 3rd cartridge valve 60 through the cartridge valve import 601 of the 3rd cartridge valve 60, then high pressure oil enters the second motor 5 and the 4th port 52 through the second motor 5 flows out through the 3rd port 51 of the second motor 5, the hydraulic oil flowed out from the second motor 5 flows into the 4th cartridge valves 70 by the cartridge valve of the 4th cartridge valve 70 outlet 702 and cartridge valve import 701 through the 4th cartridge valve 70 is flowed out, finally flow back in oil vessel 10.Thus, the second motor 5 chain cutter reversion cutting can be controlled by main oil pump 20.
When the second hydraulic fluid port 202 of main oil pump 20 is as oil outlet, when first hydraulic fluid port 201 is as return opening, 4th cartridge valve 70 is opened by the high pressure oil that main oil pump 20 exports, high pressure oil flows into the 4th cartridge valve 70 and cartridge valve outlet 702 through the 4th cartridge valve 70 is flowed out through the cartridge valve import 701 of the 4th cartridge valve 70, then high pressure oil enters the second motor 5 and the 3rd port 51 through the second motor 5 flows out through the 4th port 52 of the second motor 5, the hydraulic oil flowed out from the second motor 5 flows into the 3rd cartridge valves 60 by the cartridge valve of the 3rd cartridge valve 60 outlet 602 and cartridge valve import 601 through the 3rd cartridge valve 60 is flowed out, finally flow back in oil vessel 10.Thus, the second motor 5 chain cutter can be controlled by main oil pump 20 and rotate forward cutting.
In addition, in the process of closed hydraulic system work, the part high-temperature liquid force feed in system can flow back to oil vessel 10 by flushing valve 6 and relief valve 7, thus can dispel the heat to the hydraulic oil in closed type hydraulic system 100.
Generally speaking, by the control of the control gear in closed type hydraulic system 100, can switch main oil pump 20 and the oil circuit between the first motor 4 and the second motor 5, realize the actuator that single pump Time-sharing control is different, decrease number of elements, reduce cost, and the structure of this closed type hydraulic system 100 is simple, is conducive to the maintenance process simulation of system.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a closed type hydraulic system, is characterized in that, comprising:
Oil vessel, described oil vessel is used for storage liquid force feed;
For providing the power plant of power for described closed type hydraulic system, the entrance of described power plant is connected with described oil vessel, and described power plant comprise main oil pump, and described main oil pump is two-way variable displacement pump and has the first hydraulic fluid port and the second hydraulic fluid port;
First motor and the second motor;
Control gear, described control gear is located at described main oil pump, between described first motor and described second motor to make a conducting in described main oil pump and described first motor and described second motor and another blocks.
2. closed type hydraulic system according to claim 1, is characterized in that, described first motor has the first port and the second port, and described second motor has the 3rd port and the 4th port, and wherein said control gear comprises:
Cartridge valve group, described cartridge valve group comprises first to fourth cartridge valve, described first to fourth cartridge valve includes cartridge valve import, cartridge valve outlet and cartridge valve controlled donsole, the cartridge valve import of wherein said first cartridge valve is connected with the first hydraulic fluid port of described main oil pump with the described cartridge valve import of the 3rd cartridge valve, the cartridge valve import of described second cartridge valve is connected with the second hydraulic fluid port of described main oil pump with the described cartridge valve import of the 4th cartridge valve, and the cartridge valve outlet of described first to fourth cartridge valve is connected with described first to fourth port respectively;
COMM communication, described COMM communication is connected between described main oil pump and described cartridge valve group, described COMM communication controls described hydraulic oil and enters into the cartridge valve controlled donsole of described first cartridge valve and the cartridge valve controlled donsole of described second cartridge valve to cut off described main oil pump and described first motor, or described COMM communication controls described hydraulic oil and enters into the cartridge valve controlled donsole of described 3rd cartridge valve and the cartridge valve controlled donsole of described 4th cartridge valve to cut off described main oil pump and described second motor.
3. closed type hydraulic system according to claim 2, is characterized in that, described COMM communication comprises:
Shuttle valve, described shuttle valve has the first import, the second import and outlet, and described first import is connected with the first hydraulic fluid port of described main oil pump, and described second import is connected with the second hydraulic fluid port of described main oil pump;
Four-way valve, described four-way valve has first to fourth valve port, described first valve port is connected with the outlet of described shuttle valve, described second valve port is connected with described oil vessel, described 3rd valve port is connected with the cartridge valve controlled donsole of described second cartridge valve with the cartridge valve controlled donsole of described first cartridge valve, and described 4th valve port is connected with the cartridge valve controlled donsole of described 4th cartridge valve with the cartridge valve controlled donsole of described 3rd cartridge valve.
4. closed type hydraulic system according to claim 3, is characterized in that, described four-way valve is two-way electric control three position four-way directional control valve.
5. closed type hydraulic system according to claim 1, it is characterized in that, described power plant also comprise: slippage pump, the access of described slippage pump becomes the entrance of described power plant, described repairing delivery side of pump is connected with the second hydraulic fluid port with the first hydraulic fluid port of described main oil pump with the second one-way valve respectively respectively by the first one-way valve, and described first one-way valve is configured to by described repairing delivery side of pump to described first hydraulic fluid port one-way conduction, described second one-way valve is configured to by described repairing delivery side of pump to described second hydraulic fluid port one-way conduction.
6. the closed type hydraulic system according to any one of claim 1-5, is characterized in that, also comprises flushing valve, and described flushing valve is located between described power plant and described oil vessel part high-temperature liquid force feed to be guided in described oil vessel.
7. closed type hydraulic system according to claim 6, is characterized in that, also comprises relief valve, and described relief valve to be located between described flushing valve and described oil vessel and to be suitable for respectively being communicated with described oil vessel with described flushing valve.
8. closed type hydraulic system according to claim 7, is characterized in that, described flushing valve is three-way diverter valve, and three of described three-way diverter valve commutation valve ports are connected with described relief valve with the first hydraulic fluid port of described main oil pump, the second hydraulic fluid port respectively.
9. a vehicle, is characterized in that, comprises the closed type hydraulic system according to any one of claim 1-8.
10. vehicle according to claim 9, it is characterized in that, described vehicle is tunnel precutting trough vehicle, and described tunnel precutting trough vehicle comprises walking arrangement and chain cutter cutting equipment, described first motor is for driving described walking arrangement, and described second motor is for driving described chain cutter cutting equipment.
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Also Published As
| Publication number | Publication date |
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| CN105402178B (en) | 2017-08-25 |
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