CN219932590U - Hydraulic circuit, deflection hydraulic system and working machine - Google Patents
Hydraulic circuit, deflection hydraulic system and working machine Download PDFInfo
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- CN219932590U CN219932590U CN202320793170.4U CN202320793170U CN219932590U CN 219932590 U CN219932590 U CN 219932590U CN 202320793170 U CN202320793170 U CN 202320793170U CN 219932590 U CN219932590 U CN 219932590U
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- 238000004891 communication Methods 0.000 claims abstract description 46
- 230000001502 supplementing effect Effects 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000013589 supplement Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model relates to the field of deflection hydraulic control, and provides a hydraulic circuit, a deflection hydraulic system and a working machine, wherein the hydraulic circuit comprises: the communication valve group is communicated with the oil inlet passage and the oil return passage; the oil supplementing valve group is connected with the oil inlet path and the oil return path; the on-off valve is connected between the communication valve group and the oil inlet path and the oil return path, and the on-off valve is used for enabling the communication valve group and the oil supplementing valve group to work together. The hydraulic circuit provided by the utility model is used for solving the defect of low return speed of the working device in the prior art, and after the deflection actuating mechanism stops oil feeding, the communication valve group and the oil supplementing valve group are controlled to start working through the on-off valve, the communication valve group enables the oil feeding path and the oil return path of the deflection actuating mechanism to be communicated, and shaking in the return recovery process of the working device driven by the deflection actuating mechanism is reduced; the oil supplementing valve group supplements oil to the oil inlet channel and the oil return channel, and the recovery speed of return is increased.
Description
Technical Field
The utility model relates to the technical field of deflection hydraulic control, in particular to a hydraulic circuit, a deflection hydraulic system and a working machine.
Background
The backhoe loader is a single device consisting of three building equipment and commonly called as 'busy at both ends'. During construction, an operator can change the working end by only rotating the seat. When the excavating loader makes deflection scram at the excavating end working device, the problem of severe shaking exists, the working device is difficult to reach a designated position in time, and the shaking of the working device also causes shaking of the whole vehicle, so that the production efficiency and the operation comfort are affected.
The existing hydraulic system of the backhoe loader is provided with the communication valve group on the oil inlet path and the oil return path of the actuating mechanism, so that when the working device is suddenly stopped in a deflection working state, the shaking amount of the working device is reduced, but the return speed of the working device is still very slow.
Disclosure of Invention
The utility model provides a hydraulic circuit, a deflection hydraulic system and an operation machine, which are used for solving the defect of low return speed of a working device in the prior art, realizing the arrangement of a communication valve group to communicate an oil inlet channel with an oil return channel, reducing the shaking of the working device when the working device returns, and accelerating the return speed by arranging an oil supplementing valve group to supplement oil to the oil inlet channel and the oil return channel.
The present utility model provides a hydraulic circuit comprising:
the communication valve group is used for communicating an oil inlet path and an oil return path of the deflection actuating mechanism;
the oil supplementing valve group is connected with the oil inlet path and the oil return path and is used for supplementing oil to the oil inlet path and the oil return path;
the on-off valve is connected between the communication valve group and the oil inlet path and between the communication valve group and the oil return path, and the on-off valve is used for enabling the communication valve group and the oil supplementing valve group to work together.
According to the hydraulic circuit provided by the utility model, the oil supplementing valve group comprises an oil supplementing source, the oil supplementing source is respectively connected with the oil inlet channel and the oil return channel, and the oil supplementing source is used for being opened simultaneously with the on-off valve.
According to the hydraulic circuit provided by the utility model, the oil supplementing valve group is connected between the communication valve group and the on-off valve, the oil supplementing valve group comprises a first one-way valve, a second one-way valve and an oil supplementing source, an oil inlet of the first one-way valve is connected with the oil supplementing source, and an oil outlet of the first one-way valve is respectively connected with the oil inlet path and the communication valve group;
the oil inlet of the second one-way valve is connected with the oil supplementing source, and the oil outlet of the second one-way valve is connected with the oil return channel and the communication valve group respectively.
According to the hydraulic circuit provided by the utility model, the communication valve group comprises a first slide valve and a second slide valve, an oil inlet of the first slide valve is connected with the oil return path, and an oil outlet of the first slide valve is connected with the oil inlet path;
and an oil inlet of the second slide valve is connected with the oil inlet path, and an oil outlet of the second slide valve is connected with the oil return path.
According to the hydraulic circuit provided by the utility model, the first oil port of the on-off valve is connected with the oil inlet path or the oil return path, and the second oil port of the on-off valve is connected with the oil outlet of the first one-way valve or the oil outlet of the second one-way valve;
the on-off valve comprises a first working position and a second working position, wherein the first oil port and the second oil port are disconnected in the state of the first working position, and the first oil port and the second oil port are communicated in the state of the second working position.
According to the hydraulic circuit provided by the utility model, the on-off valve is an electromagnetic reversing valve, and the electromagnetic reversing valve is used for being electrically connected with a traveling control system of the working machine.
The utility model also provides a deflection hydraulic system, which comprises a deflection actuating mechanism, a deflection main circuit and the hydraulic circuit;
the deflection main loop comprises an oil inlet path and an oil return path, the deflection main loop is connected with the deflection actuating mechanism through the oil inlet path and the oil return path, and the hydraulic loop is connected with the oil inlet path and the oil return path.
According to the deflection hydraulic system provided by the utility model, the deflection main loop comprises an oil tank, a first overflow valve, a second overflow valve, a first oil supplementing valve and a second oil supplementing valve, wherein the first overflow valve is connected between the oil inlet path and the oil tank, and the second overflow valve is connected between the oil return path and the oil tank; the first oil supplementing valve is connected with the first overflow valve in parallel, and the second oil supplementing valve is connected with the second overflow valve in parallel;
the hydraulic circuit is arranged on the oil inlet path and the oil return path between the deflection executing mechanism and the first overflow valve and between the deflection executing mechanism and the second overflow valve.
The utility model also provides a working machine, which comprises the hydraulic circuit;
alternatively, the work machine includes a yaw hydraulic system as described above.
The working machine provided by the utility model further comprises a driving control system, wherein the driving control system comprises a controller, a driving gear and a parking brake gear, the driving gear and the parking brake gear are electrically connected with the controller, and the controller is electrically connected with the on-off valve;
wherein, the on-off valve is an electromagnetic reversing valve.
According to the hydraulic circuit provided by the utility model, after the deflection actuating mechanism stops oil feeding, the communication valve group and the oil supplementing valve group are controlled to start working through the on-off valve, the communication valve group enables the oil feeding path and the oil return path of the deflection actuating mechanism to be communicated, and shaking in the return and recovery process of the working device driven by the deflection actuating mechanism is reduced; the oil supplementing valve group supplements oil to the oil inlet channel and the oil return channel, and the recovery speed of return is increased.
Further, the yaw hydraulic system and the work machine according to the present utility model have the above-described hydraulic circuit, and therefore have various advantages as described above.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a hydraulic schematic diagram of a hydraulic circuit provided by the present utility model.
Reference numerals:
100: an oil supplementing valve group; 101: a first one-way valve; 102: a second one-way valve; 103: supplementing an oil source; 110: an oil inlet path; 120: an oil return path; 200: a communication valve group; 201: a first spool valve; 202: a second spool valve; 203: damping; 300: an on-off valve; 400: a yaw actuator; 401: a first cylinder; 402: a second cylinder; 403: a first overflow valve; 404: a second overflow valve; 405: a first oil replenishment valve; 406: a second oil supplementing valve; 407: an oil tank; 408: and a deflection control valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
An embodiment of the present utility model is described below with reference to fig. 1. It is to be understood that the following are only illustrative embodiments of the present utility model and are not to be construed as limiting the utility model.
In the related art, after the yaw actuator 400 finishes the yaw motion, the oil feeding is stopped, the yaw actuator 400 mechanism is restored to the original position, and at the moment of stopping the oil feeding, due to the inertia influence of the working device, the yaw actuator 400 can shake in the restoration process, and the restoration process is slower. In view of the above problems, the present utility model provides a hydraulic circuit, as shown in fig. 1, including: the oil inlet path 110 and the oil return path 120 of the deflection actuating mechanism 400 are communicated by the communication valve bank 200, the oil supplementing valve bank 100 and the on-off valve 300; the oil supplementing valve group 100 is connected with the oil inlet passage 110 and the oil return passage 120, and the oil supplementing valve group 100 is used for supplementing oil to the oil inlet passage 110 and the oil return passage 120; the on-off valve 300 is connected between the communication valve block 200 and the oil inlet path 110 and the oil return path 120, and the on-off valve 300 is used for enabling the communication valve block 200 to work together with the oil supplementing valve block 100.
After the deflection actuating mechanism 400 stops oil feeding, the oil feeding path 110 forms low pressure or negative pressure, the oil return path 120 generates impact to form high pressure, at this time, the communication valve group 200 communicates the oil feeding path 110 with the oil return path 120, oil in the oil return path 120 is supplemented into the oil feeding path 110, the pressure of the oil return path 120 is reduced, the pressure of the oil feeding path 110 is increased, and further shaking of a working device driven by the deflection actuating mechanism 400 is reduced. Meanwhile, the oil compensating valve group 100 is opened, and the oil compensating valve group 100 continuously supplements oil into the oil inlet passage 110 and the oil return passage 120, thereby accelerating pressure balance of the oil return passage 120 and the oil inlet passage 110 and accelerating restoration of the deflection actuator 400 to the original position.
The on-off valve 300 is used for controlling the communication valve group 200 and the oil compensating valve group 100 to be communicated with and disconnected from the oil inlet passage 110 and the oil return passage 120. Namely, when the deflection actuating mechanism 400 deflects, the on-off valve 300 is disconnected, and the communication valve group 200 and the oil compensating valve group 100 do not work; after the deflection actuating mechanism 400 finishes deflection action and stops oil supply, the on-off valve 300 is communicated, so that the communication valve group 200 and the oil supplementing valve group 100 perform pressure balance and oil supplementing on the oil inlet channel 110 and the oil return channel 120. That is, the communication valve group 200 passes through the on-off valve 300 while communicating the oil inlet passage 110 and the oil return passage 120; the oil supply valve block 100 may or may not pass through the on-off valve 300 when supplying oil to the oil inlet passage 110 and the oil return passage 120. For example, the on-off valve 300 may be associated with the oil replenishment valve group 100, and the oil replenishment valve group 100 may be opened while the on-off valve 300 is communicated.
With continued reference to fig. 1, in one embodiment of the present utility model, the oil compensating valve group 100 includes an oil compensating source 103, where the oil compensating source 103 is connected to the oil inlet 110 and the oil return 120, respectively, and the oil compensating source 103 is configured to be opened simultaneously with the on-off valve 300.
In other words, the on-off valve 300 controls whether the communication valve group 200 is communicated with the oil inlet channel 110 and the oil return channel 120 from on-off of the pipeline, and the on-off valve 300 can control the opening of the oil supplementing source 103 from the electric control or the hydraulic control, so that when the communication valve group 200 communicates the oil inlet channel 110 with the oil return channel 120, the oil supplementing source 103 supplements oil to the oil inlet channel 110 and the oil return channel 120 at the same time, so that the working device can quickly and accurately return to a preset position, and the working efficiency is improved. The low-pressure oil circuit has stable oil source supply in the deflection process of the deflection actuating mechanism.
In addition, in another embodiment of the present utility model, the oil compensating valve group 100 is connected between the communication valve group 200 and the on-off valve 300, the oil compensating valve group 100 includes a first check valve 110, a second check valve 102 and an oil compensating source 103, an oil inlet of the first check valve 110 is connected with the oil compensating source 103, and an oil outlet of the first check valve 110 is connected with the oil inlet path 110 and the communication valve group 200 respectively; the oil inlet of the second one-way valve 102 is connected with the oil supplementing source 103, and the oil outlet of the second one-way valve 102 is connected with the oil return channel 120 and the communication valve group 200 respectively.
In other words, the oil compensating source 103 is connected between the communication valve bank 200 and the on-off valve 300 through the first check valve 110 and the second check valve 102, so as to realize on-off of the on-off valve 300 and control the connection states of the oil compensating valve bank 100 and the communication valve bank 200 with the oil inlet path 110 and the oil return path 120. That is, after the on-off valve 300 is communicated, the oil compensating valve group 100 and the communicating valve group 200 are simultaneously communicated with the oil inlet passage 110 and the oil return passage 120. The oil supplementing source 103 may be an oil pump.
For the communication valve group 200 of the present utility model, in an alternative embodiment of the present utility model, the communication valve group 200 includes a first spool 201 and a second spool 202, an oil inlet of the first spool 201 is connected with the oil return 120, and an oil outlet of the first spool 201 is connected with the oil inlet 110; an oil inlet of the second slide valve 202 is connected with the oil inlet passage 110, and an oil outlet of the second slide valve 202 is connected with the oil return passage 120. Wherein, the oil outlet and the oil inlet of the first slide valve 201 and the second slide valve 202 are in a disconnected state in a normal state.
In the actual working process, the oil inlet channel 110 is used for oil feeding, the oil return channel 120 is used for oil return, the working device is deflected to the right, and when the oil inlet channel 110 stops feeding oil, the pressure of the oil return channel 120 is increased and the pressure of the oil inlet channel 110 is reduced under the inertial action of the working device. The on-off valve 300 is opened, high-pressure oil of the oil return channel 120 enters the first slide valve 201, an oil inlet and an oil outlet of the first slide valve 201 are communicated, and the high-pressure oil enters the oil inlet channel 110 from the oil outlet of the first slide valve 201, so that the oil return channel 120 is communicated with the oil inlet channel 110, and shaking of a working device is reduced.
However, when the working device is deflected to the left, the oil is returned to the oil inlet passage 110, the oil is returned to the oil return passage 120, and when the oil supply to the oil return passage 120 is stopped, the pressure of the oil inlet passage 110 is increased and the pressure of the oil return passage 120 is decreased by inertia of the working device. The on-off valve 300 is opened, high-pressure oil in the oil inlet path 110 enters the second slide valve 202, the oil inlet and the oil outlet of the second slide valve 202 are communicated, and the high-pressure oil enters the oil return path 120 from the oil outlet of the second slide valve 202, so that the oil return path 120 is communicated with the oil inlet path 110, and shaking of a working device is reduced. Wherein, the oil inlet path 110 and the oil return path 120 select one of the oil paths to carry out oil inlet and the other oil path to carry out oil return based on the deflection acting direction of the deflection actuating mechanism 400.
Wherein, the oil outlet of the first check valve 110 is connected with the oil inlet of the second slide valve 202, and the oil outlet of the second check valve 102 is connected with the oil inlet of the first slide valve 201. The first oil port of the on-off valve 300 is connected with the oil return channel 120, and the second oil port of the on-off valve 300 is connected with the oil outlet of the second one-way valve 102, the oil inlet of the first slide valve 201 and the oil outlet of the second slide valve 202.
Further, in an alternative embodiment of the present utility model, the spool of the first spool valve 201 is provided with damping 203 and the spool of the second spool valve 202 is provided with damping 203. The first spool 201 is identical in structure and works in the same manner as the second spool 202. With respect to the first spool 201, in a state where the first spool 201 includes the third operating position and the fourth operating position, the oil inlet and the oil outlet of the first spool 201 communicate; in the state of the fourth working position, the oil inlet and the oil outlet of the first spool 201 are disconnected. Wherein, the valve core in the third working position is provided with a damper 203, when the oil passes through the damper 203 in the first slide valve 201, the inertia energy is converted into oil heat energy, and meanwhile, the recovery of the two sides of the deflection actuator 400 is smooth, the rebound force of the working device is reduced, and the pressure fluctuation generated when the deflection actuator 400 suddenly stops is effectively reduced.
Specifically, in other embodiments of the present utility model, the first oil port of the on-off valve 300 is connected to the oil inlet 110 or the oil return 120, and the second oil port of the on-off valve 300 is connected to the oil outlet of the first check valve 110 or the oil outlet of the second check valve 102; the on-off valve 300 comprises a first working position and a second working position, wherein the first oil port and the second oil port are disconnected in the state of the first working position, and the first oil port and the second oil port are communicated in the state of the second working position. That is, the connection of the communication valve group 200 with the oil inlet passage 110 and the oil return passage 120 is achieved by switching the first and second operating positions of the on-off valve 300.
In other alternative embodiments of the present utility model, on-off valve 300 is an electromagnetic directional valve that is used to electrically connect with a travel control system of a work machine. That is, the on-off valve 300 is controlled to be on-off by an electric signal, and the electric signal of the on-off valve 300 is given to a traveling control system of the work machine. Based on the operating state of the drive control system, the on-off valve 300 is controlled to be on-off, thereby controlling when the hydraulic circuit is started.
As shown in fig. 1, the present utility model further provides a yaw hydraulic system, which includes a yaw actuator 400, a yaw main circuit, and the hydraulic circuit of the above embodiment; the deflection main circuit comprises an oil inlet circuit 110 and an oil return circuit 120, and is connected with a deflection executing mechanism 400 through the oil inlet circuit 110 and the oil return circuit 120, and the hydraulic circuit is connected to the oil inlet circuit 110 and the oil return circuit 120.
Specifically, the yaw actuator 400 includes a first cylinder 401 and a second cylinder 402, the oil inlet 110 is connected to the rodless cavity of the first cylinder 401 and the rod cavity of the second cylinder 402, and the oil return 120 is connected to the rod cavity of the first cylinder 401 and the rodless cavity of the second cylinder 402.
The deflection hydraulic system comprises a deflection oil source, the deflection main loop further comprises a deflection control valve 408, and the deflection oil source controls the deflection action of the deflection actuating mechanism 400 through the deflection control valve 408. The yaw oil source is connected to a yaw control valve 408, and the yaw control valve 408 is connected to the yaw actuator 400 through the oil intake path 110 and the oil return path 120. The hydraulic circuit is laterally provided on the oil intake passage 110 and the oil return passage 120.
Furthermore, in some embodiments of the present utility model, the yaw main circuit includes a tank 407, a first relief valve 403, a second relief valve 404, a first makeup valve 405, and a second makeup valve 406, the first relief valve 403 being connected between the oil inlet line 110 and the tank 407, the second relief valve 404 being connected between the oil return line 120 and the tank 407; the first oil compensating valve 405 is connected with the first overflow valve 403 in parallel, and the second oil compensating valve 406 is connected with the second overflow valve 404 in parallel; the hydraulic circuit is provided in the oil intake path 110 and the oil return path 120 between the yaw actuator 400 and the first relief valve 403 and the second relief valve 404.
Wherein, the first oil compensating valve 405 and the second oil compensating valve 406 may be check valves, and the oil inlet of the check valves is connected with the oil tank 407.
The utility model also provides a working machine, comprising the hydraulic circuit of the embodiment; alternatively, the work machine includes the yaw hydraulic system of the above-described embodiments. The work machine may be an excavator, an excavating loader, or the like.
With continued reference to FIG. 1, in other embodiments of the present disclosure, the work machine further includes a travel control system including a controller, a travel gear, and a park brake gear, the travel gear, the park brake gear being electrically connected to the controller, the controller being electrically connected to the on-off valve 300; wherein, the on-off valve 300 is an electromagnetic reversing valve.
For example, after the parking brake position is opened, the working machine is in a stopped state, and at this time, the controller controls the on-off valve 300 to be in a communicating state regardless of the running gear, and the hydraulic circuit is opened to operate.
After the parking brake gear is closed, when the driving gear is in the N gear, the working machine is in a parking state, the controller controls the on-off valve 300 to be in a communicating state, and the hydraulic circuit is started to work.
After the parking brake gear is closed, when the driving gear is in the F gear or the R gear, the working machine is in a driving state, the controller controls the on-off valve 300 to be in an off state, and the hydraulic circuit does not work.
According to the hydraulic circuit provided by the utility model, after the deflection actuating mechanism 400 stops oil feeding, the communication valve group 200 and the oil supplementing valve group 100 are controlled to start working through the on-off valve 300, the communication valve group 200 enables the oil feeding path 110 and the oil return path 120 of the deflection actuating mechanism 400 to be communicated, and shaking in the return and recovery process of a working device driven by the deflection actuating mechanism 400 is reduced; the oil compensating valve group 100 supplements oil to the oil inlet passage 110 and the oil return passage 120, and accelerates the recovery speed of return.
Further, the yaw hydraulic system and the work machine according to the present utility model have the above-described hydraulic circuit, and therefore have various advantages as described above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A hydraulic circuit, comprising:
the communication valve group is used for communicating an oil inlet path and an oil return path of the deflection actuating mechanism;
the oil supplementing valve group is connected with the oil inlet path and the oil return path and is used for supplementing oil to the oil inlet path and the oil return path;
the on-off valve is connected between the communication valve group and the oil inlet path and between the communication valve group and the oil return path, and the on-off valve is used for enabling the communication valve group and the oil supplementing valve group to work together.
2. The hydraulic circuit of claim 1, wherein the makeup valve block includes a makeup oil source connected to the oil inlet and the oil return, respectively, the makeup oil source being configured to open simultaneously with the on-off valve.
3. The hydraulic circuit of claim 1, wherein the oil compensating valve block is connected between the communication valve block and the on-off valve, the oil compensating valve block comprises a first one-way valve, a second one-way valve and an oil compensating source, an oil inlet of the first one-way valve is connected with the oil compensating source, and an oil outlet of the first one-way valve is connected with the oil inlet path and the communication valve block respectively;
the oil inlet of the second one-way valve is connected with the oil supplementing source, and the oil outlet of the second one-way valve is connected with the oil return channel and the communication valve group respectively.
4. A hydraulic circuit according to any one of claims 1 to 3, wherein the communication valve group includes a first spool and a second spool, an oil inlet of the first spool being connected to the oil return passage, and an oil outlet of the first spool being connected to the oil inlet passage;
and an oil inlet of the second slide valve is connected with the oil inlet path, and an oil outlet of the second slide valve is connected with the oil return path.
5. The hydraulic circuit according to claim 3, wherein a first oil port of the on-off valve is connected to the oil inlet path or the oil return path, and a second oil port of the on-off valve is connected to an oil outlet of the first check valve or an oil outlet of the second check valve;
the on-off valve comprises a first working position and a second working position, wherein in the state of the first working position, a first oil port and a second oil port of the on-off valve are disconnected, and in the state of the second working position, the first oil port and the second oil port are communicated.
6. The hydraulic circuit according to claim 1 or 5, characterized in that the on-off valve is an electromagnetic directional valve for electrical connection with a service control system of a work machine.
7. A yaw hydraulic system comprising a yaw actuator, a yaw main circuit and the hydraulic circuit of any one of claims 1 to 6;
the deflection main loop comprises an oil inlet path and an oil return path, the deflection main loop is connected with the deflection actuating mechanism through the oil inlet path and the oil return path, and the hydraulic loop is connected with the oil inlet path and the oil return path.
8. The yaw hydraulic system of claim 7, wherein the yaw main circuit includes a tank, a first relief valve, a second relief valve, a first makeup valve, and a second makeup valve, the first relief valve being connected between the oil inlet and the tank, the second relief valve being connected between the oil return and the tank; the first oil supplementing valve is connected with the first overflow valve in parallel, and the second oil supplementing valve is connected with the second overflow valve in parallel;
the hydraulic circuit is arranged on the oil inlet path and the oil return path between the deflection executing mechanism and the first overflow valve and between the deflection executing mechanism and the second overflow valve.
9. A work machine comprising the hydraulic circuit according to any one of claims 1 to 6;
alternatively, the work machine includes a yaw hydraulic system according to claim 7 or 8.
10. The work machine of claim 9, further comprising a drive control system comprising a controller, a drive gear, and a park brake gear, the drive gear, the park brake gear being electrically connected to the controller, the controller being electrically connected to the on-off valve;
wherein, the on-off valve is an electromagnetic reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320793170.4U CN219932590U (en) | 2023-04-11 | 2023-04-11 | Hydraulic circuit, deflection hydraulic system and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320793170.4U CN219932590U (en) | 2023-04-11 | 2023-04-11 | Hydraulic circuit, deflection hydraulic system and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219932590U true CN219932590U (en) | 2023-10-31 |
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ID=88485811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320793170.4U Active CN219932590U (en) | 2023-04-11 | 2023-04-11 | Hydraulic circuit, deflection hydraulic system and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219932590U (en) |
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2023
- 2023-04-11 CN CN202320793170.4U patent/CN219932590U/en active Active
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