CN218760670U - Hydraulic control system and working machine - Google Patents
Hydraulic control system and working machine Download PDFInfo
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- CN218760670U CN218760670U CN202223308826.3U CN202223308826U CN218760670U CN 218760670 U CN218760670 U CN 218760670U CN 202223308826 U CN202223308826 U CN 202223308826U CN 218760670 U CN218760670 U CN 218760670U
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Abstract
The utility model relates to a hydraulic system technical field provides a hydraulic control system and operation machinery. In the hydraulic system, an oil outlet of a first hydraulic pump is connected with a first execution unit. An oil outlet of the second hydraulic pump is connected with the second execution unit. And the confluence control valve is connected between the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump so as to control the first hydraulic pump and the second hydraulic pump to be confluent and supplied to the first execution unit and the second execution unit. The oil supplementing control valve group is connected between the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump, so that the first hydraulic pump can supplement oil to the second execution unit, or the second hydraulic pump can supplement oil to the first execution unit.
Description
Technical Field
The utility model relates to a hydraulic system technical field especially relates to a hydraulic control system and operation machinery.
Background
An excavator is an important type of work machine. Excavators typically use a hydraulic system as a drive system for their implement. There are hydraulic systems in the prior art that are driven by dual pumps. In other words, two hydraulic pumps are provided in the hydraulic system, so that each hydraulic pump drives a different actuator unit. For example, in the hydraulic system shown in fig. 1, a confluence control valve is provided between two execution units. When the confluence control valve is in a communication state, the two hydraulic pumps can completely join and supply the two execution units. In such a hydraulic system, complete confluence of the two pumps is achieved, partial flow replenishment of the one-side hydraulic pump to the other-side execution unit cannot be achieved, and the confluence replenishment range that can be achieved is limited. When the flow output of a single-sided hydraulic pump is greater than the work demand of its corresponding implement unit, inefficiencies in the hydraulic system may result.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydraulic control system and operation machinery for it is limited to solve the confluence supply scope that the aforesaid can only realize that the hydraulic control system of the complete confluence of double pump can realize, may lead to the problem of hydraulic system inefficiency.
According to the utility model discloses an aspect provides a hydraulic control system, include: the hydraulic control system comprises a first execution unit, a second execution unit, a first hydraulic pump, a second hydraulic pump, a confluence control valve and an oil supplementing control valve group.
Wherein, the oil outlet of the first hydraulic pump is connected with the first execution unit. The oil outlet of the second hydraulic pump is connected with the second execution unit. The confluence control valve is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump to control the first hydraulic pump and the second hydraulic pump to be confluent and supplied to the first execution unit and the second execution unit. The oil supplementing control valve group is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump, so that the first hydraulic pump supplements oil to the second execution unit, or the second hydraulic pump supplements oil to the first execution unit.
According to the utility model provides a pair of hydraulic control system, the oil supplementing control valves includes first oil supplementing control valve and second oil supplementing control valve.
The first oil supplementing control valve is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump and used for controlling the first hydraulic pump to supplement oil to the second execution unit. The second oil supplementing control valve is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump and used for controlling the second hydraulic pump to supplement oil to the first execution unit.
According to the utility model provides a pair of hydraulic control system, first benefit oil control valve includes first switching-over valve and first shuttle valve.
And a first oil inlet of the first shuttle valve is connected with an oil outlet of the first hydraulic pump, and a second oil inlet of the first shuttle valve is connected with an oil outlet of the second hydraulic pump. And the oil outlet of the first shuttle valve is connected with the oil inlet of the first reversing valve. The oil outlet of the first reversing valve is communicated with the oil outlet of the second hydraulic pump and is connected with the second execution unit.
And a first throttling hole is formed between the oil inlet of the first reversing valve and the oil outlet of the first reversing valve.
According to the utility model provides a pair of hydraulic control system, first switching-over valve includes first benefit oil level and first benefit oil stop position.
And in the state of the first oil supplementing level, the oil inlet of the first reversing valve is communicated with the oil outlet of the first reversing valve through the first throttle hole, and the first hydraulic pump is communicated with the second execution unit through the first reversing valve. And in the state of the first oil supplementing stopping position, the oil inlet of the first reversing valve and the oil outlet of the first reversing valve are mutually stopped, and the first hydraulic pump is stopped with the second execution unit through the first reversing valve.
According to the utility model provides a pair of hydraulic control system, second benefit oil control valve includes second switching-over valve and second shuttle valve.
And a first oil inlet of the second shuttle valve is connected with an oil outlet of the second hydraulic pump, and a second oil inlet of the second shuttle valve is connected with an oil outlet of the first hydraulic pump. And the oil outlet of the second shuttle valve is connected with the oil inlet of the second reversing valve. And the oil outlet of the second reversing valve is communicated with the oil outlet of the first hydraulic pump and is connected with the first execution unit.
And a second throttling hole is formed between the oil inlet of the second reversing valve and the oil outlet of the second reversing valve.
According to the utility model provides a pair of hydraulic control system, the second switching-over valve includes that second benefit oil level and second benefit oil cut off the position.
And in the state of the second oil supplementing level, the oil inlet of the second reversing valve is communicated with the oil outlet of the second reversing valve through the second throttle hole, and the second hydraulic pump is communicated with the first execution unit through the second reversing valve. And in the state of the second oil supplementing stopping position, the oil inlet of the second reversing valve and the oil outlet of the second reversing valve are mutually stopped, and the second hydraulic pump is stopped from the first execution unit through the second reversing valve.
According to the utility model provides a pair of hydraulic control system, the confluence control valve includes confluence position and confluence stop position.
And in the state of the confluence position, the oil outlet of the first hydraulic pump is communicated with the oil outlet of the second hydraulic pump, and the first hydraulic pump and the second hydraulic pump are converged and supply oil for the first execution unit and the second execution unit together. And in the state of the confluence cutoff position, the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump are mutually cut off, the first hydraulic pump independently supplies oil for the first execution unit, and the second hydraulic pump independently supplies oil for the second execution unit.
According to the utility model provides a pair of hydraulic control system, first execution unit includes left side walking executive component, swing arm executive component and scraper bowl executive component. The second execution unit comprises a right walking execution assembly, a rotation execution assembly and a bucket rod execution assembly.
The left walking executing assembly, the movable arm executing assembly and the bucket executing assembly are arranged in parallel. The right walking executing assembly, the rotating executing assembly and the bucket rod executing assembly are arranged in parallel.
According to the utility model provides a pair of hydraulic control system, the second execution unit still includes reserve executive component, reserve executive component with the right side walking executive component gyration executive component reaches the mutual parallelly connected setting of dipper executive component.
According to a second aspect of the present invention, there is provided a work machine comprising a hydraulic control system as described above.
The utility model provides an among the hydraulic control system, first hydraulic pump is connected with first execution unit, and the second hydraulic pump is connected with the second execution unit, sets up the confluence control valve between the connecting line of first hydraulic pump and first execution unit and the connecting line of second hydraulic pump and second execution unit. When the confluence control valve is in a communication state, the first hydraulic pump and the second hydraulic pump can realize complete confluence and jointly supply the first execution unit and the second execution unit. When the confluence control valve is in a cut-off state, the first hydraulic pump independently supplies the first execution unit, and the second hydraulic pump independently supplies the second execution unit.
An oil supplementing control valve group is further arranged between a connecting pipeline of the first hydraulic pump and the first execution unit and a connecting pipeline of the second hydraulic pump and the second execution unit. Part of the flow output by the first hydraulic pump can be supplied to the second execution unit through the oil supplementing control valve group, and the rest flow output by the first hydraulic pump can be normally supplied to the first execution unit. Or partial flow output by the second hydraulic pump can be supplemented and supplied to the first execution unit through the oil supplementing control valve group, and the rest flow output by the second hydraulic pump can be supplied into the second execution unit normally.
By the arrangement, a confluence control valve and an oil supplementing control valve set are arranged between the connecting pipeline of the first hydraulic pump and the first execution unit and the connecting pipeline of the second hydraulic pump and the second execution unit, so that the confluence supplementing range which can be realized by the hydraulic control system can be expanded. When the double pumps are required to be completely combined, the combining control valve is switched to a communication state. When the single pump is required to independently drive the work, the confluence control valve is switched to a cut-off state. In addition, when the flow output of the first hydraulic pump or the second hydraulic pump is greater than the work demand of the first execution unit or the second execution unit, the excess flow can be replenished to the second execution unit or the first execution unit, thereby improving the pump source efficiency of the hydraulic system.
Further, since the working machine comprises the hydraulic control system as described above, it also has the advantages as described above.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a system schematic of a prior art hydraulic control system;
FIG. 2 is a system schematic of a hydraulic control system provided by the present invention;
reference numerals:
100. a first execution unit; 101. a left walk execution assembly; 102. a boom actuator assembly; 103. a bucket actuating assembly; 200. a second execution unit; 201. a right walking execution component; 202. a rotation executing assembly; 203. a dipper handle execution assembly; 204. a standby execution component; 300. a first hydraulic pump; 400. a second hydraulic pump; 500. a confluence control valve; 600. a first oil supply control valve; 601. a first direction changing valve; 602. a first shuttle valve; 603. a first orifice; 700. a second oil supply control valve; 701. a second directional control valve; 702. a second shuttle valve; 703. a second orifice.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood as specific cases to those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, without mutual contradiction, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, and the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following describes a hydraulic control system and a working machine according to an embodiment of the present invention with reference to fig. 2. It should be understood that the following description is only exemplary of the present invention, and is not intended to limit the present invention in any way.
An embodiment of the first aspect of the present invention provides a hydraulic control system, as shown in fig. 2, the hydraulic control system includes: a first execution unit 100, a second execution unit 200, a first hydraulic pump 300, a second hydraulic pump 400, a confluence control valve 500, and an oil replenishment control valve group.
Wherein, the oil outlet of the first hydraulic pump 300 is connected with the first execution unit 100. An oil outlet of the second hydraulic pump 400 is connected with the second execution unit 200. A confluence control valve 500 is connected between an outlet of the first hydraulic pump 300 and an outlet of the second hydraulic pump 400 to control the first hydraulic pump 300 and the second hydraulic pump 400 to be confluent to feed the first execution unit 100 and the second execution unit 200. The oil supply control valve group is connected between an oil outlet of the first hydraulic pump 300 and an oil outlet of the second hydraulic pump 400, so that the first hydraulic pump 300 supplies oil to the second execution unit 200, or the second hydraulic pump 400 supplies oil to the first execution unit 100.
The utility model provides an among the hydraulic control system, first hydraulic pump 300 is connected with first execution unit 100, and second hydraulic pump 400 is connected with second execution unit 200, sets up confluence control valve 500 between the connecting line of first hydraulic pump 300 and first execution unit 100 and the connecting line of second hydraulic pump 400 and second execution unit 200. When the confluence control valve 500 is in a communication state, the first and second hydraulic pumps 300 and 400 can achieve complete confluence and supply the first and second actuators 100 and 200 together. When the confluence control valve 500 is in a cut-off state, the first hydraulic pump 300 independently supplies the first actuator 100, and the second hydraulic pump 400 independently supplies the second actuator 200.
An oil supply control valve group is further provided between a connection line of the first hydraulic pump 300 and the first actuator 100 and a connection line of the second hydraulic pump 400 and the second actuator 200. Part of the output flow of the first hydraulic pump 300 may be supplementarily supplied to the second execution unit 200 through the oil supply control valve group, and the rest of the output flow of the first hydraulic pump 300 may be normally supplied to the first execution unit 100. Alternatively, a part of the output flow of the second hydraulic pump 400 may be supplied to the first actuator 100 through the oil supply control valve set, and the remaining output flow of the second hydraulic pump 400 may be supplied to the second actuator 200 during normal supply.
With this arrangement, the confluence control valve 500 and the oil replenishment control valve group are provided between the connection line between the first hydraulic pump 300 and the first actuator 100 and the connection line between the second hydraulic pump 400 and the second actuator 200, and the confluence replenishment range that can be achieved by the hydraulic control system can be expanded. When the double pumps are required to completely merge, the merge control valve 500 is switched to the communication state. When the single-pump independent driving operation is required, the confluence control valve 500 is switched to the cutoff state. Further, when the flow rate output of the first or second hydraulic pump 300 or 400 is greater than the work demand of the first or second actuator unit 100 or 200, an excessive flow rate may be replenished to the second or first actuator unit 200 or 100, whereby the pump source efficiency of the hydraulic system can be improved.
In an embodiment of the present invention, as shown in fig. 2, the first actuating unit 100 includes a left walking actuating assembly 101, a boom actuating assembly 102 and a bucket actuating assembly 103. The second execution unit 200 includes a right walking execution component 201, a slewing execution component 202, and an arm execution component 203.
The left travel actuator 101, the boom actuator 102, and the bucket actuator 103 are arranged in parallel with each other. The right travel actuator 201, the swing actuator 202, and the arm actuator 203 are provided in parallel with each other.
Further, in an embodiment of the present invention, as shown in fig. 2, the second execution unit 200 further includes a standby execution component 204. The standby executing component 204 is connected in parallel with the right walking executing component 201, the swing executing component 202, and the arm executing component 203.
The left travel executing assembly 101 includes a left travel control valve and a left travel motor. Boom actuator assembly 102 includes a boom control valve and a boom cylinder. The bucket actuation assembly 103 includes a bucket control valve and a bucket cylinder. The right travel actuator 201 includes a right travel control valve and a right travel motor. The swing actuator assembly 202 includes a swing control valve and a swing motor. The arm actuator 203 includes an arm control valve and an arm cylinder. The backup actuator assembly 204 includes a backup control valve and a backup cylinder or a backup motor. The spare oil cylinder or the spare motor can be provided with a spare operation accessory. For example, the backup work attachment includes, but is not limited to, a hydraulic shear.
In the working process, when the working machine needs to be controlled to linearly travel, the flow input to the left travel motor and the flow input to the right travel motor need to be ensured to be the same. At this time, the left travel control valve and the right travel control valve are maintained at the same opening degree of the oil port. Then, the confluence control valve 500 is switched to a communication state, and the oil replenishment control valve group is closed. The first hydraulic pump 300 and the second hydraulic pump 400 are completely merged such that the flow rates of the left traveling motor and the right traveling motor are equal to each other and the left traveling motor and the right traveling motor operate at the same rotation speed, and the working machine is maintained in a straight traveling state. When one or more of the boom actuator 102, the bucket actuator 103, the swing actuator 202, the arm actuator 203, and the backup actuator 204 are simultaneously opened, the first hydraulic pump 300 and the second hydraulic pump 400 are merged and sequentially drive the actuator operations in order of the load from small to large.
When the boom actuator assembly 102, the bucket actuator assembly 103, the swing actuator assembly 202, the arm actuator assembly 203, and the backup actuator assembly 204 are actuated independently, the confluence control valve 500 may be selectively turned on or off according to actual demands.
In an embodiment of the present invention, as shown in fig. 2, the oil compensation control valve set includes a first oil compensation control valve 600 and a second oil compensation control valve 700.
The first oil-replenishing control valve 600 is connected between an oil outlet of the first hydraulic pump 300 and an oil outlet of the second hydraulic pump 400, and is used for controlling the first hydraulic pump 300 to replenish oil to the second execution unit 200; the second oil-replenishing control valve 700 is connected between the outlet port of the first hydraulic pump 300 and the outlet port of the second hydraulic pump 400, and is used to control the second hydraulic pump 400 to replenish the first actuator unit 100 with oil.
For example, when the output flow rate of the first hydraulic pump 300 is greater than the operation demand of the first execution unit 100, the first oil-replenishing control valve 600 may be communicated such that a part of the oil of the first hydraulic pump 300 is input into the first execution unit 100 to ensure the normal operation of the first execution unit 100, and the rest of the oil is replenished into the second execution unit 200 through the first oil-replenishing control valve 600. When the output flow of the second hydraulic pump 400 is greater than the operation demand of the second execution unit 200, the second oil-replenishing control valve 700 may be communicated, so that part of the oil of the second hydraulic pump 400 is input into the second execution unit 200 to ensure the normal operation of the second execution unit 200, and the rest of the oil is replenished into the first execution unit 100 through the second oil-replenishing control valve 700. Therefore, energy waste can be reduced, and the pump source efficiency of the hydraulic system is improved.
Specifically, in one embodiment of the present invention, as shown in fig. 2, the first oil replenishment control valve 600 includes a first direction change valve 601 and a first shuttle valve 602.
A first oil inlet of the first shuttle valve 602 is connected with an oil outlet of the first hydraulic pump 300, and a second oil inlet of the first shuttle valve 602 is connected with an oil outlet of the second hydraulic pump 400. An oil outlet of the first shuttle valve 602 is connected with an oil inlet of the first reversing valve 601, and an oil outlet of the first reversing valve 601 is communicated with an oil outlet of the second hydraulic pump 400 and connected with the second execution unit 200.
A first throttle hole 603 is arranged between the oil inlet of the first reversing valve 601 and the oil outlet of the first reversing valve 601.
In one embodiment of the present invention, the first direction valve 601 includes a first oil compensation level and a first oil compensation cut-off level.
In the state of the first oil supplement level, the oil inlet of the first reversing valve 601 is communicated with the oil outlet of the first reversing valve 601 through a first throttle hole 603, and the first hydraulic pump 300 is communicated with the second execution unit 200 through the first reversing valve 601; in the state of the first oil supplementing stop position, the oil inlet of the first direction valve 601 and the oil outlet of the first direction valve 601 are stopped, and the first hydraulic pump 300 is stopped with the second execution unit 200 through the first direction valve 601.
Further, in an embodiment of the present invention, as shown in fig. 2, the second oil replenishment control valve 700 includes a second direction change valve 701 and a second shuttle valve 702.
Wherein, the first oil inlet of the second shuttle valve 702 is connected with the oil outlet of the second hydraulic pump 400. The second oil inlet of the second shuttle valve 702 is connected with the oil outlet of the first hydraulic pump 300. The oil outlet of the second shuttle valve 702 is connected with the oil inlet of the second reversing valve 701. The oil outlet of the second reversing valve 701 is communicated with the oil outlet of the first hydraulic pump 300 and is connected with the first execution unit 100.
A second throttle hole 703 is arranged between the oil inlet of the second reversing valve 701 and the oil outlet of the second reversing valve 701.
In one embodiment of the present invention, the second direction valve 701 includes a second oil compensation level and a second oil compensation cut-off level.
In the state of the second oil supplement level, the oil inlet of the second reversing valve 701 is communicated with the oil outlet of the second reversing valve 701 through a second orifice 703, and the second hydraulic pump 400 is communicated with the first execution unit 100 through the second reversing valve 701; in the state of the second oil supply cut-off position, the oil inlet of the second directional valve 701 and the oil outlet of the second directional valve 701 are cut off, and the second hydraulic pump 400 is cut off from the first execution unit 100 through the second directional valve 701.
During operation, for example, when the boom actuator 102 and the swing actuator 202 are simultaneously actuated, the first direction valve 601 is switched to the first oil supply cutoff position, and the second direction valve 701 is switched to the second oil supply level. When the output pressure of the first hydraulic pump 300 is greater than the output pressure of the second hydraulic pump 400, the first hydraulic pump 300 cannot supply oil to the swing actuator assembly 202 by the blocking action of the first direction valve 601. At this time, the first hydraulic pump 300 independently drives the boom actuator 102, and the second hydraulic pump 400 independently drives the swing actuator 202. When the output pressure of the second hydraulic pump is greater than the output pressure of the first hydraulic pump 300, the second hydraulic pump 400 can supply oil to the boom actuator 102 through the second shuttle valve 702 and the second direction changing valve 701. At this time, the boom actuator 102 is driven by the first hydraulic pump 300 together with the second hydraulic pump 400, and the swing actuator 202 is driven by the second hydraulic pump 400 alone. This can give priority to the boom actuator 102 over the swing actuator 202.
For another example, when the boom actuator 102 and the arm actuator 203 are simultaneously actuated, the first direction valve 601 is switched to the first oil supply cutoff position, and the second direction valve 701 is switched to the second oil supply level. When the output pressure of first hydraulic pump 300 is greater than the output pressure of second hydraulic pump 400, first hydraulic pump 300 cannot supply oil to arm actuator 203 by the blocking action of first switching valve 601. At this time, the first hydraulic pump 300 independently drives the boom actuator 102, and the second hydraulic pump 400 independently drives the arm actuator 203. When the output pressure of the second hydraulic pump is greater than the output pressure of the first hydraulic pump 300, the second hydraulic pump 400 can supply oil to the boom actuator 102 through the second shuttle valve 702 and the second direction changing valve 701. At this time, the boom actuator 102 is driven by the first hydraulic pump 300 together with the second hydraulic pump 400, and the arm actuator 203 is driven by the second hydraulic pump 400 alone. This can give priority to the boom actuator 102 over the arm actuator 203.
Therefore, the working state of the first reversing valve 601 and the second reversing valve 701 in the hydraulic control system can be automatically adjusted by a worker according to the actual priority control requirement of the execution assembly. In addition, the first direction valve 601 and the second direction valve 701 each include, but are not limited to, a two-position two-way electromagnetic direction valve.
It should be noted that the above embodiment is only an exemplary embodiment of the present invention, and does not constitute any limitation to the present invention. For example, in other embodiments of the present invention, the first shuttle valve 602 in the first oil replenishment control valve 600 may be replaced with a first check valve, and the first check valve is installed between the oil outlet of the first direction changing valve 601 and the oil outlet of the second hydraulic pump 400. Similarly, the second shuttle valve 702 in the second oil-replenishing control valve 700 may be replaced with a second check valve, and the second check valve is installed between the oil outlet of the second direction-changing valve 701 and the oil outlet of the first hydraulic pump 300.
In one embodiment of the present invention, the confluence control valve 500 includes a confluence location and a confluence cutoff location.
In the state of the merge position, the outlet port of the first hydraulic pump 300 communicates with the outlet port of the second hydraulic pump 400. The first hydraulic pump 300 and the second hydraulic pump 400 merge and supply oil to the first actuator unit 100 and the second actuator unit 200 together.
In the state of the confluence cutoff position, the oil outlet of the first hydraulic pump 300 and the oil outlet of the second hydraulic pump 400 are cut off from each other, the first hydraulic pump 300 independently supplies oil to the first execution unit 100, and the second hydraulic pump 400 independently supplies oil to the second execution unit 200.
When the working machine needs to be driven to travel straight, the confluence control valve 500 may be switched to the confluence position, the first switching valve 601 may be switched to the first oil replenishment shutoff position, and the second switching valve 701 may be switched to the second oil replenishment shutoff position. When the execution components in the first execution unit 100 and the second execution unit 200 need to be controlled to realize priority control, the confluence control valve 500 may be switched to the confluence cut-off position, and the first direction valve 601 and the second direction valve 701 may be switched to the first oil supplement cut-off position and the second oil supplement cut-off position, respectively, according to actual requirements, or the first direction valve 601 and the second direction valve 701 may be switched to the first oil supplement cut-off position and the second oil supplement position, respectively.
An embodiment of the second aspect of the present invention provides a working machine, including a hydraulic control system as described above.
For example, the work machine includes an excavator.
It should be understood that the above-described embodiment is only an exemplary embodiment of the present invention, and should not constitute any limitation to the present invention. That is, the work machine includes, but is not limited to, an excavator. For example, in another embodiment of the present invention, the working machine may further include a crane car or a loading vehicle.
Further, since the working machine comprises the hydraulic control system as described above, it also has the advantages as described above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A hydraulic control system is characterized by comprising a first execution unit, a second execution unit, a first hydraulic pump, a second hydraulic pump, a confluence control valve and an oil supplementing control valve group,
the oil outlet of the first hydraulic pump is connected with the first execution unit, the oil outlet of the second hydraulic pump is connected with the second execution unit, the confluence control valve is connected between the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump to control the first hydraulic pump and the second hydraulic pump to be confluent to be supplied to the first execution unit and the second execution unit, and the oil supplementing control valve group is connected between the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump to enable the first hydraulic pump to supplement oil to the second execution unit or enable the second hydraulic pump to supplement oil to the first execution unit.
2. The hydraulic control system of claim 1, wherein the set of makeup control valves includes a first makeup control valve and a second makeup control valve,
the first oil supplementing control valve is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump and is used for controlling the first hydraulic pump to supplement oil to the second execution unit; the second oil supplementing control valve is connected between an oil outlet of the first hydraulic pump and an oil outlet of the second hydraulic pump and used for controlling the second hydraulic pump to supplement oil to the first execution unit.
3. The hydraulic control system of claim 2, wherein the first replenishment control valve comprises a first directional control valve and a first shuttle valve,
wherein, a first oil inlet of the first shuttle valve is connected with an oil outlet of the first hydraulic pump, a second oil inlet of the first shuttle valve is connected with an oil outlet of the second hydraulic pump, an oil outlet of the first shuttle valve is connected with an oil inlet of the first reversing valve, an oil outlet of the first reversing valve is communicated with an oil outlet of the second hydraulic pump and is connected with the second execution unit,
and a first throttling hole is formed between the oil inlet of the first reversing valve and the oil outlet of the first reversing valve.
4. The hydraulic control system of claim 3, wherein the first directional valve includes a first makeup level and a first makeup cut-off level,
in the state of the first oil supplementing level, an oil inlet of the first reversing valve is communicated with an oil outlet of the first reversing valve through the first throttle hole, and the first hydraulic pump is communicated with the second execution unit through the first reversing valve; and in the state of the first oil supplementing stopping position, the oil inlet of the first reversing valve and the oil outlet of the first reversing valve are mutually stopped, and the first hydraulic pump is stopped with the second execution unit through the first reversing valve.
5. The hydraulic control system of claim 2, wherein the second makeup control valve includes a second directional control valve and a second shuttle valve,
wherein a first oil inlet of the second shuttle valve is connected with an oil outlet of the second hydraulic pump, a second oil inlet of the second shuttle valve is connected with an oil outlet of the first hydraulic pump, an oil outlet of the second shuttle valve is connected with an oil inlet of the second reversing valve, an oil outlet of the second reversing valve is communicated with an oil outlet of the first hydraulic pump and is connected with the first execution unit,
and a second throttling hole is formed between the oil inlet of the second reversing valve and the oil outlet of the second reversing valve.
6. The hydraulic control system of claim 5, wherein the second directional valve includes a second makeup level and a second makeup cut-off level,
in the state of the second oil supplementing level, an oil inlet of the second reversing valve is communicated with an oil outlet of the second reversing valve through the second throttle hole, and the second hydraulic pump is communicated with the first execution unit through the second reversing valve; and in the state of the second oil supplementing stopping position, the oil inlet of the second reversing valve and the oil outlet of the second reversing valve are mutually stopped, and the second hydraulic pump is stopped from the first execution unit through the second reversing valve.
7. The hydraulic control system of claim 1, wherein the confluence control valve includes a confluence location and a confluence cutoff location,
under the state of the confluence position, an oil outlet of the first hydraulic pump is communicated with an oil outlet of the second hydraulic pump, and the first hydraulic pump and the second hydraulic pump are converged and supply oil for the first execution unit and the second execution unit together; and in the state of the confluence cutoff position, the oil outlet of the first hydraulic pump and the oil outlet of the second hydraulic pump are mutually cut off, the first hydraulic pump independently supplies oil for the first execution unit, and the second hydraulic pump independently supplies oil for the second execution unit.
8. The hydraulic control system of claim 1, wherein the first implement unit includes a left travel implement assembly, a boom implement assembly, and a bucket implement assembly, the second implement unit includes a right travel implement assembly, a swing implement assembly, and an arm implement assembly,
the left walking executing assembly, the movable arm executing assembly and the bucket executing assembly are arranged in parallel, and the right walking executing assembly, the rotation executing assembly and the bucket rod executing assembly are arranged in parallel.
9. The hydraulic control system of claim 8, wherein the second implement unit further includes a backup implement assembly, the backup implement assembly being disposed in parallel with the right travel implement assembly, the swing implement assembly, and the stick implement assembly.
10. A work machine characterized by comprising a hydraulic control system according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223308826.3U CN218760670U (en) | 2022-12-09 | 2022-12-09 | Hydraulic control system and working machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223308826.3U CN218760670U (en) | 2022-12-09 | 2022-12-09 | Hydraulic control system and working machine |
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| CN218760670U true CN218760670U (en) | 2023-03-28 |
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