CN112962710B

CN112962710B - Hydraulic system of excavator, excavator and power sharing machine group

Info

Publication number: CN112962710B
Application number: CN202110194336.6A
Authority: CN
Inventors: 曹原; 谢进利; 陈继承
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2023-02-03
Anticipated expiration: 2041-02-20
Also published as: CN112962710A

Abstract

The invention provides a hydraulic system of an excavator, the excavator and a power sharing machine group, wherein the hydraulic system of the excavator comprises: a main pump; the oil outlet end of the oil tank is communicated with the oil inlet end of the main pump; the oil inlet end of the multi-way valve is communicated with the oil outlet end of the main pump through a first pipeline, and the first pipeline is provided with a first joint for feeding oil to other excavators; the feedback end of the multi-way valve is communicated with the feedback end of the main pump through a second pipeline, and the second pipeline is provided with a second joint for other excavators to feed back oil pressure; the oil outlet end of the multi-way valve is communicated with the oil inlet end of the oil tank through a third pipeline, and the third pipeline is provided with a third joint for returning oil of other excavators. According to the hydraulic system of the excavator, the excavator and the power sharing machine group, the first joint, the second joint and the third joint for sharing power with other excavators are arranged, so that power can be supplied by other normal excavators when the excavator loses power, and the emergency treatment efficiency is improved.

Description

Hydraulic system of excavator, excavator and power sharing machine group

Technical Field

The invention relates to the technical field of working machinery, in particular to a hydraulic system of an excavator, the excavator and a power sharing machine group.

Background

When the excavator is used for building construction, a plurality of excavators are often required to be used for simultaneous operation, the excavator can break down and lose power during construction operation, and when the excavator loses power and cannot move, normal work of other excavators can be influenced, certain potential safety hazards can be caused to the construction environment, and obstruction can be caused to a construction site.

At present when handling the condition that the job site excavator loses power, often find crane and trailer and drag trouble excavator away maintenance, nevertheless at the in-process of waiting for the haul, trouble excavator still remains in the job site, causes inconveniently, and the cost of using crane and trailer is higher moreover, and to the condition that the excavator loses power, emergency treatment's efficiency is lower, and the cost is higher.

Disclosure of Invention

The invention provides a hydraulic system of an excavator, the excavator and a power sharing machine group, which are used for solving the defects of low emergency treatment efficiency and high cost of the excavator under the condition that the excavator loses power in the prior art, and the invention realizes that other normal excavators are used for supplying power when the excavator loses power, thereby reducing the emergency treatment cost and improving the emergency treatment efficiency.

The present invention provides a hydraulic system of an excavator, including: a main pump; the oil outlet end of the oil tank is communicated with the oil inlet end of the main pump; the oil inlet end of the multi-way valve is communicated with the oil outlet end of the main pump through a first pipeline, and the first pipeline is provided with a first joint for supplying oil to an external excavator; the feedback end of the multi-way valve is communicated with the feedback end of the main pump through a second pipeline, and the second pipeline is provided with a second joint for feeding back oil pressure of an external excavator; the oil outlet end of the multi-way valve is communicated with the oil inlet end of the oil tank through a third pipeline, and the third pipeline is provided with a third joint for returning oil of the external excavator.

According to the hydraulic system of the excavator provided by the invention, the hydraulic system of the excavator further comprises: the oil collecting block, the oil outlet end of the oil collecting block with the oil inlet end of the oil tank is communicated through a fourth pipeline, and the fourth pipeline is provided with a fourth joint for returning the oil collecting block of the external excavator.

According to the hydraulic system of the excavator, the oil drainage end of the multi-way valve is communicated with the oil inlet end of the oil collecting block.

According to the hydraulic system of the excavator provided by the present invention, the hydraulic system of the excavator further comprises: the oil inlet end of the oil source valve is communicated with the oil outlet end of the main pump, and the oil outlet end of the oil source valve is communicated with the oil inlet end of the oil collecting block; the oil outlet end of the central joint is communicated with the oil inlet end of the oil collecting block; the oil discharge end of the pilot oil collection block is communicated with the oil inlet end of the oil collection block; and the oil discharge end of the rotary motor is communicated with the oil inlet end of the oil collection block.

According to the hydraulic system of the excavator, the oil supplementing end of the rotary motor is communicated with the oil outlet end of the oil tank.

According to the hydraulic system of the excavator, the third pipeline is provided with a first valve, and the first valve is arranged between the third joint and the input end of the oil tank; and the fourth pipeline is provided with a second valve, and the second valve is arranged between the fourth joint and the input end of the oil tank.

According to the hydraulic system of the excavator, a fifth pipeline is further arranged between the oil outlet end of the multi-way valve and the oil inlet end of the oil tank, and the fifth pipeline is provided with a third valve.

According to the hydraulic system of the excavator, the third pipeline is provided with the first oil return one-way valve and the hydraulic oil radiator, and the first oil return one-way valve and the hydraulic oil radiator are sequentially arranged between the first valve and the oil inlet end of the oil tank; and the fifth pipeline is provided with a second oil return one-way valve, and the second oil return one-way valve is arranged between the third valve and the oil inlet end of the oil tank.

The present invention also provides an excavator, comprising: a body; the actuating mechanism is arranged on the machine body; in the hydraulic system of the excavator, the actuator is connected to the hydraulic system of the excavator in a power coupling manner.

The present invention also provides a power sharing cluster, comprising: in the excavator according to any one of the above aspects, the first joints of the excavators communicate with each other, the second joints of the excavators communicate with each other, and the third joints of the excavators communicate with each other.

According to the hydraulic system of the excavator, the excavator and the power sharing machine group, the first joint, the second joint and the third joint for sharing power with the external excavator are arranged, so that power can be supplied by other normal excavators when the excavator loses power, the emergency treatment cost can be reduced, and the emergency treatment efficiency can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a hydraulic system of an excavator provided by the present invention;

FIG. 2 is a schematic diagram of a power-sharing cluster according to the present invention.

Reference numerals:

10: a main pump; 20: an oil tank; 30: a multi-way valve;

40: a first pipeline; 41: a second pipeline; 42: a third pipeline;

43: a fourth pipeline; 44: a fifth pipeline; 50: a first joint;

51: a second joint; 52: a third joint; 53: a fourth joint;

60: oil collection blocks; 70: an oil source valve; 71: a center joint;

72: leading an oil collecting block; 73: a rotary motor; 80: a first valve;

81: a second valve; 82: a third valve; 83: a first oil return check valve;

84: a second return check valve; 85: a hydraulic oil radiator; 90: a normal excavator;

91: provided is a fault excavator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are based on the directions 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 direction, be configured and operated in a specific direction, and thus, cannot be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth" 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" are to 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. Specific meanings of the above terms in the embodiments of the present invention may be understood as specific cases by those of ordinary skill in the art.

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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

The hydraulic system of the excavator, the excavator and the power sharing cluster of the present invention will be described with reference to fig. 1-2.

As shown in fig. 1, the present invention provides a hydraulic system of an excavator, including: main pump 10, oil tank 20, multi-way valve 30.

It should be noted that the hydraulic system of the excavator herein is suitable for a load-sensitive system excavator, the load-sensitive system excavator has only one main pump 10, the main pump 10 drives a plurality of actuators, and the actions of the actuators are independent and do not interfere with each other.

Wherein, the oil feed end intercommunication of the end that produces oil of oil tank 20 and main pump 10, can have stored hydraulic oil in the oil tank 20, and the oil feed end of main pump 10 can pump hydraulic oil from the end that produces oil of oil tank 20 through the pipeline, and the main pump 10 of excavator is the power supply of excavator, can drive hydraulic oil and carry out the oil circuit circulation, provides power for the actuating mechanism of excavator.

The multi-way valve 30 may have an inlet end, an outlet end, and a feedback end.

The oil inlet end of the multi-way valve 30 is communicated with the oil outlet end of the main pump 10 through the first pipeline 40, the hydraulic oil pumped by the main pump 10 enters the multi-way valve 30 from the oil inlet end of the multi-way valve 30, that is, the hydraulic oil pumped by the main pump 10 passes through the multi-way valve 30, and the multi-way valve 30 can manage the hydraulic oil pumped by the main pump 10.

The multi-way valve 30 may be connected to a plurality of actuators, an oil path may be formed between the multi-way valve 30 and each actuator to circulate, that is, hydraulic oil is pumped to the actuators, the actuators can convert kinetic energy provided by the hydraulic oil into energy required by the actuators to operate, for example, the actuators are main arms, and the main arms can be driven to lift or lower by the hydraulic oil.

The first pipe 40 is provided with a first joint 50 for supplying oil to an external excavator, and the first joint 50 can be connected to the first pipe 40 through a three-way valve, that is, a part of hydraulic oil flows to the first joint 50 while the output end of the main pump 10 supplies hydraulic oil to the oil inlet end of the multi-way valve 30.

As shown in fig. 2, each excavator is provided with a first joint 50, when the excavator has a fault, the first joint 50 of the normal excavator 90 and the first joint 50 of the fault excavator 91 can be communicated through a pipeline, and hydraulic oil can flow from the first joint 50 of the normal excavator 90 to the first joint 50 of the fault excavator 91, so that the hydraulic oil can enter a hydraulic system of the fault excavator 91.

The feedback end of the multiplex valve 30 communicates with the feedback end of the main pump 10 through a second line 41.

It will be appreciated that the feedback side of the multi-way valve 30 is capable of feeding back oil pressure to the feedback side of the main pump 10 via the second line 41, where there is no hydraulic oil flowing in the second line 41, and the hydraulic oil in the second line 41 is static, i.e. the second line 41 can only deliver oil pressure to the feedback side of the main pump 10 and not flow.

Set up feedback end at multiple unit valve 30 and feed back the oil pressure for main pump 10, can in time feed back the main pump 10 with the received oil pressure of actuating mechanism, main pump 10 can in time adjust the oil pressure of the hydraulic oil of output according to the oil pressure of feedback, also can adjust oil pressure according to feedback signal, it has exceeded the upper limit value for the oil pressure to show as feedback signal, the end of producing oil of control main pump 10 reduces oil pressure this moment, show as feedback signal that the oil pressure is less than the lower limit value, the end of producing oil of control main pump 10 increases oil pressure this moment.

The second pipeline 41 is provided with a second joint 51 for feeding back oil pressure of the external excavator, the second joint 51 can be connected to the second pipeline 41 through a three-way valve, that is, the feedback end of the main pump 10 can also be communicated with the feedback end of the multi-way valve 30 of the external excavator through the second joint 51, and the feedback end of the main pump 10 can receive a feedback signal of the multi-way valve 30 of the external excavator.

Each excavator is provided with the second joint 51, and when the excavator has a fault, the second joint 51 of the normal excavator 90 and the second joint 51 of the fault excavator 91 can be communicated through a pipeline, so that the second joint 51 of the fault excavator 91 can feed back an oil pressure signal to the main pump 10 of the normal excavator 90.

The oil outlet end of the multi-way valve 30 is communicated with the oil inlet end of the oil tank 20 through a third pipeline 42, and the multi-way valve 30 delivers the hydraulic oil to the oil inlet end of the oil tank 20 through the third pipeline 42 according to the flow sequence of the hydraulic oil.

The third pipeline 42 is provided with a third joint 52 for returning oil of an external excavator, and the third joint 52 can be connected to the third pipeline 42 through a three-way valve, that is, the third joint 52 can also convey hydraulic oil to the oil inlet of the oil tank 20 while the output end of the multi-way valve 30 conveys hydraulic oil to the oil inlet of the oil tank 20.

Each excavator is provided with the third joint 52, when the excavator has a fault, the third joint 52 of the normal excavator and the third joint 52 of the fault excavator 91 can be communicated through a pipeline, and then hydraulic oil can flow to the third joint 52 through the multi-way valve 30 of the fault excavator 91, so that the hydraulic oil can flow back to the oil tank 20 of the normal excavator 90.

The excavator 91 here means that the excavator loses power, that is, the main pump 10 of the excavator 91 cannot supply hydraulic oil to the hydraulic system.

Here, by connecting the first joint 50 of the normal excavator 90 and the first joint 50 of the fault excavator 91, the hydraulic oil of the normal excavator 90 can be delivered to the hydraulic system of the fault excavator 91; the second joint 51 of the normal excavator 90 is connected with the second joint 51 of the fault excavator 91, so that the feedback signal of the multi-way valve 30 of the fault excavator 91 can be sent to the main pump 10 of the normal excavator 90; by connecting the third joint 52 of the normal excavator 90 and the third joint 52 of the malfunctioning excavator 91, the hydraulic oil in the multi-way valve 30 of the malfunctioning excavator 91 can be returned to the tank 20 of the normal excavator 90.

That is to say, in the present embodiment, when designing the hydraulic system of the excavator, it is no longer limited to use one excavator itself as the target research object, but two or more excavators are considered to be operated in parallel, and the parallel design is performed, so that each excavator can operate independently, and the hydraulic system of one normal excavator 90 and the hydraulic systems of another or more excavators losing power can be connected through the reserved power takeoff ports, that is, the first joint 50, the second joint 51, and the third joint 52, to form an excavator group, that is, an excavator "local area network" system, where the normal excavator 90 serves as a power station, all the fault excavators 91 in the system can be driven by the normal excavator 90 at the same time, and all the normal excavators 90 and the fault excavators 91 in the system can operate independently or simultaneously.

It is noted that the fault excavator 91 and the normal excavator 90 share hydraulic power only, and the direction and motion control of the fault excavator 91 is controlled by its own control system, that is, the fault excavator 91 can still be controlled by its own cab.

Of course, when a plurality of excavators share power at the same time, the plurality of excavators are affected by power distribution. The work efficiency of each excavator is reduced on a regular basis, and if only one normal excavator 90 and one fault excavator 91 are connected in the local area network, when the normal excavator 90 does not act and the fault excavator 91 acts, the fault excavator 91 can completely absorb the whole power of the normal excavator 90.

It should be noted that the electrical system of the driven excavator needs to have a certain reserve power. When the engine stops, the pilot oil supply electromagnetic valve is switched on and off. In general, for safety reasons, the coil power supply circuit of the pilot oil supply solenoid valve of the excavator is designed to be in a direct connection mode. Namely, the power is directly supplied by the spare battery without passing through the controller. Therefore, as a failure vehicle to be driven, energy is the most important resource. In order to reduce the basic power consumption of the whole electrical system and prolong the endurance time of the standby power supply, a one-key emergency mode can be designed based on the electrical system. In the mode, only the power supply to the pilot oil source power supply loop is reserved, and all other functions are cut off. When the excavator is in butt joint with the normal excavator 90 to receive the drive of the normal excavator, the emergency mode is started, the power consumption of the whole excavator is reduced, and only the most basic pilot operation function is reserved.

The first joint 50 is arranged on the first pipeline 40 between the multi-way valve 30 and the main pump 10 and used for supplying oil to an external excavator, the second joint 51 is arranged on the second pipeline 41 between the multi-way valve 30 and the main pump 10 and used for receiving feedback of the external excavator, the third joint 52 is arranged on the third pipeline 42 between the multi-way valve 30 and the oil tank 20 and used for returning oil to the external excavator, when the excavator loses power, other normal excavators 90 can be used for supplying power, the cost of emergency treatment can be reduced, and the efficiency of emergency treatment is improved.

According to the hydraulic system of the excavator, the first joint 50, the second joint 51 and the third joint 52 are arranged for sharing power with the external excavator, so that when the excavator loses power, other normal excavators 90 can be used for supplying power, the emergency treatment cost can be reduced, and the emergency treatment efficiency can be improved.

As shown in fig. 1, in some embodiments, the hydraulic system of the excavator further includes: an oil collection block 60.

The oil collecting block 60 is mainly used for oil drainage, hydraulic oil collected by the oil collecting block 60 belongs to low-pressure oil drained by the actuating mechanism, the oil collecting block 60 is not communicated with a main hydraulic oil pipeline, the oil collecting block 60 can be communicated with an oil drainage end of the actuating mechanism, redundant hydraulic oil in the actuating mechanism can be collected in time, and the redundant hydraulic oil returns to the oil tank 20.

The oil outlet end of the oil collection block 60 is communicated with the oil inlet end of the oil tank 20 through the fourth pipeline 43, that is, the hydraulic oil collected by the oil collection block 60 can flow out through the fourth pipeline 43 and be delivered to the oil tank 20.

The fourth pipeline 43 is provided with a fourth joint 53 for returning oil to an oil collection block 60 of an external excavator, and the fourth joint 53 can be connected to the fourth pipeline 43 through a three-way valve, that is, the oil collection block 60 returns oil to the oil tank 20 through the fourth pipeline 43, and simultaneously the fourth joint 53 can return oil to the oil tank 20 through the fourth pipeline 43.

Each excavator is provided with the fourth joint 53, when the excavator has a fault, the fourth joint 53 of the normal excavator 90 and the fourth joint 53 of the fault excavator 91 can be communicated through a pipeline, so that the oil collecting block 60 of the fault excavator 91 can flow from the fourth joint 53 of the fault excavator 91 to the fourth joint 53 of the normal excavator 90, and oil is returned to the oil tank 20 of the normal excavator 90.

As shown in FIG. 1, in some embodiments, the drain end of the multiplex valve 30 communicates with the oil inlet end of the oil collection block 60.

It can be understood that, when the multi-way valve 30 is in operation, a part of hydraulic oil with lower pressure needs to be discharged, here, the multi-way valve 30 is also used as an actuating mechanism, the oil discharging end of the multi-way valve 30 is communicated with the oil inlet end of the oil collecting block 60, and the oil is discharged from the multi-way valve 30 through the oil collecting block 60, so that the convenience of recovering the oil of the fault excavator by a normal excavator can be improved.

As shown in fig. 1, in some embodiments, the hydraulic system of the excavator further includes: an oil source valve 70, a center joint 71, a pilot oil collection block 72, and a swing motor 73.

The oil inlet side of the oil source valve 70 is communicated with the oil outlet side of the main pump 10, the oil discharge side of the oil source valve 70 is communicated with the oil inlet side of the oil collection block 60, and the oil source valve 70 is used to power a portion of the low pressure actuator where the oil is discharged through the oil collection block 60 to the oil source valve 70.

The oil drainage end of the central joint 71 communicates with the oil inlet end of the oil collection block 60, and the central joint 71 is a conventional actuator of an excavator, where oil can be drained through the oil collection block 60 to the central joint 71.

The oil discharge end of the pilot oil collection block 72 is communicated with the oil inlet end of the oil collection block 60, and the pilot oil collection block 72 is a conventional actuating element of the excavator, and oil can be discharged to the pilot oil collection block 72 through the oil collection block 60.

The oil discharge end of the swing motor 73 communicates with the oil inlet end of the oil collection block 60, and the swing motor 73 is a conventional actuator of an excavator, where oil can be discharged to the swing motor 73 through the oil collection block 60.

The convenience of the normal excavator for recovering the oil of the failed excavator can be further improved by draining the oil from the oil source valve 70, the center joint 71, the pilot oil collecting block 72 and the swing motor 73 through the oil collecting block 60.

As shown in fig. 1, in some embodiments, the oil supply end of the rotary motor 73 is communicated with the oil outlet end of the oil tank 20, and of course, a return check valve may be provided on a pipeline between the oil supply end of the rotary motor 73 and the oil outlet end of the oil tank 20, and the oil supply end of the rotary motor 73 may be communicated with an inlet end of the return check valve. The stability of oil pressure needs to be guaranteed when the rotary motor 73 operates, and when the rotary motor 73 is lack of oil, oil is independently supplemented to the rotary motor 73 through the oil tank 20 in time, so that the working stability of the rotary motor 73 can be improved.

In some embodiments, as shown in fig. 1, the third pipeline 42 is provided with a first valve 80, the first valve 80 is provided between the third connector 52 and the input end of the oil tank 20, and when the first valve 80 is closed, the multi-way valve 30 cannot return oil to the oil tank 20.

The fourth pipe 43 is provided with a second valve 81, the second valve 81 is provided between the fourth joint 53 and the input end of the oil tank 20, and when the second valve 81 is closed, the oil collection block 60 cannot return oil to the oil tank 20.

In some embodiments, as shown in FIG. 1, a fifth line 44 is provided between the outlet end of the multiplex valve 30 and the inlet end of the tank 20, and the fifth line 44 is provided with a third valve 82.

As shown in fig. 1, in some embodiments, the third pipeline 42 is provided with a first oil return check valve 83 and a hydraulic oil radiator 85, and the first oil return check valve 83 and the hydraulic oil radiator 85 are sequentially installed between the first valve 80 and the oil inlet end of the oil tank 20.

It will be appreciated that the first oil return check valve 83 is used to depressurize the third line 42, corresponding to damping being provided in the third line 42, and that the pressure of the first oil return check valve 83 may be 2Bar to 3Bar, for example 2.5Bar.

The hydraulic oil radiator 85 is used for cooling and dissipating heat of the hydraulic oil in the third pipeline 42, and can also reduce pressure of the third pipeline 42, and the pressure of the hydraulic oil radiator 85 can be 2Bar to 3Bar, for example, 2.5Bar.

The fifth line 44 is provided with a second return check valve 84, the second return check valve 84 being mounted between the third valve 82 and the inlet end of the tank 20.

It should be noted that the oil supply end of the rotary motor 73 may communicate with the oil inlet end of the second oil return check valve 84, and oil is returned to the oil tank 20 through the second oil return check valve 84.

It will be appreciated that the second return check valve 84 is used for depressurizing the fifth line 44, corresponding to a damping being provided in the fifth line 44, and that the pressure of the second return check valve 84 may be 4Bar to 6Bar, for example 5Bar.

The first valve 80, the second valve 81 and the third valve 82 are provided here, when the normal excavator 90 and the fault excavator 91 are communicated, the first valve 80, the second valve 81 and the third valve 82 of the normal excavator 90 can be kept in a normally open state, so that the multi-way valve 30 of the normal excavator 90 and the multi-way valve 30 of the fault excavator 91 can return oil to the oil tank 20 through the third pipeline 42, the oil collection block 60 of the normal excavator 90 and the oil collection block 60 of the fault excavator 91 can return oil to the oil tank 20 through the fourth pipeline 43, and the multi-way valve 30 of the normal excavator 90 and the multi-way valve 30 of the fault excavator 91 can also return oil to the oil tank 20 through the fifth pipeline.

The first valve 80, the second valve 81, and the third valve 82 of the malfunctioning excavator 91 can be maintained in the normally closed state, and then the multi-way valve 30 of the normal excavator 90 and the multi-way valve 30 of the malfunctioning excavator 91 cannot return oil to the tank 20 of the malfunctioning excavator 91 through the third pipeline 42 thereof, and cannot return oil to the tank 20 through the fourth pipeline 43 thereof, and the multi-way valve 30 of the normal excavator 90 and the multi-way valve 30 of the malfunctioning excavator 91 cannot return oil to the tank 20 through the fifth pipeline thereof, but rather, hydraulic oil is supplied to the tank 20 of the normal excavator 90.

An embodiment of the present invention further provides an excavator, including: a body, an actuator and a hydraulic system of the excavator as in the above embodiments.

The actuating mechanism is arranged on the machine body and is in power coupling connection with a hydraulic system of the excavator.

It is understood that the multi-way valve 30 of the hydraulic system of the excavator can supply hydraulic oil to the actuating mechanism so as to provide power for the actuating mechanism, and the actuating mechanism can perform working actions under the driving of the hydraulic system.

As shown in fig. 2, an embodiment of the present invention further provides a power-sharing cluster, where the power-sharing cluster includes: in the plural excavators according to the above-described embodiments, the first joints 50 of the plural excavators communicate with each other, the second joints 51 of the plural excavators communicate with each other, and the third joints 52 of the plural excavators communicate with each other.

It can be understood that the power sharing cluster can include at least two excavators, and the power sharing cluster can be composed of one normal excavator 90 and at least one fault excavator 91, where the connection between the first joint 50 of the normal excavator 90 and the first joint 50 of the fault excavator 91 can deliver the hydraulic oil of the normal excavator 90 to the hydraulic system of the fault excavator 91; the second joint 51 of the normal excavator 90 is connected with the second joint 51 of the fault excavator 91, so that the feedback signal of the multi-way valve 30 of the fault excavator 91 can be sent to the main pump 10 of the normal excavator 90; by connecting the third joint 52 of the normal excavator 90 and the third joint 52 of the malfunctioning excavator 91, the hydraulic oil in the multi-way valve 30 of the malfunctioning excavator 91 can be returned to the tank 20 of the normal excavator 90.

It is noted that the fault excavator 91 and the normal excavator 90 share hydraulic power only, and the direction and motion control of the fault excavator 91 is controlled by its own control system, that is, the fault excavator 91 can still be operated by its own cab.

The first joint 50 is arranged on the first pipeline 40 between the multi-way valve 30 and the main pump 10 and used for supplying oil to an external excavator, the second joint 51 is arranged on the second pipeline 41 between the multi-way valve 30 and the main pump 10 and used for receiving feedback of the external excavator, the third joint 52 is arranged on the third pipeline 42 between the multi-way valve 30 and the oil tank 20 and used for returning oil to the external excavator, when the excavator loses power, other normal excavators 90 are used for supplying power, the emergency treatment cost can be reduced, and the emergency treatment efficiency is improved.

According to the power sharing cluster, the first connector 50, the second connector 51 and the third connector 52 are arranged for sharing power with an external excavator, so that power can be supplied by other normal excavators 90 when the excavator loses power, the emergency treatment cost can be reduced, and the emergency treatment efficiency can be improved.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but 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 of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic system of an excavator, comprising:

a main pump;

the oil outlet end of the oil tank is communicated with the oil inlet end of the main pump;

the oil inlet end of the multi-way valve is communicated with the oil outlet end of the main pump through a first pipeline, the first pipeline is provided with a first joint for feeding oil to an external excavator, the feedback end of the multi-way valve is communicated with the feedback end of the main pump through a second pipeline, the second pipeline is provided with a second joint for feeding oil pressure back to the external excavator, the oil outlet end of the multi-way valve is communicated with the oil inlet end of the oil tank through a third pipeline, the third pipeline is provided with a third joint for feeding oil back to the external excavator, and the first joint, the second joint and the third joint of at least two hydraulic systems of the excavator are correspondingly connected to form an excavator group;

and the oil inlet end of the oil source valve is communicated with the oil outlet end of the main pump, and the oil source valve is used for supplying power to the low-pressure actuating mechanism.

2. The hydraulic system of the excavator of claim 1 further comprising:

the oil collecting block, the oil outlet end of the oil collecting block with the oil inlet end of the oil tank is communicated through a fourth pipeline, the fourth pipeline is provided with a fourth joint for oil return of the oil collecting block of the external excavator, and the oil outlet end of the oil source valve is communicated with the oil inlet end of the oil collecting block.

3. The hydraulic system of the excavator according to claim 2, wherein an oil discharge end of the multi-way valve communicates with an oil feed end of the oil collection block.

4. The hydraulic system of the excavator of claim 2 further comprising:

the oil discharge end of the central joint is communicated with the oil inlet end of the oil collecting block;

the oil discharge end of the pilot oil collection block is communicated with the oil inlet end of the oil collection block;

and the oil discharge end of the rotary motor is communicated with the oil inlet end of the oil collection block.

5. The hydraulic system of the excavator according to claim 4 wherein the oil feed end of the swing motor communicates with the oil outlet end of the oil tank.

6. The hydraulic system of the excavator according to any one of claims 2 to 5, wherein the third pipeline is provided with a first valve provided between the third joint and an input end of the tank;

and the fourth pipeline is provided with a second valve, and the second valve is arranged between the fourth joint and the input end of the oil tank.

7. The hydraulic system of the excavator according to claim 6, wherein a fifth pipeline is further provided between the oil outlet end of the multi-way valve and the oil inlet end of the oil tank, and the fifth pipeline is provided with a third valve.

8. The hydraulic system of the excavator as claimed in claim 7, wherein the third pipeline is provided with a first oil return check valve and a hydraulic oil radiator, and the first oil return check valve and the hydraulic oil radiator are sequentially installed between the first valve and an oil inlet end of the oil tank;

and the fifth pipeline is provided with a second oil return one-way valve, and the second oil return one-way valve is arranged between the third valve and the oil inlet end of the oil tank.

9. An excavator, comprising:

a body;

the actuating mechanism is arranged on the machine body;

the hydraulic system of the excavator according to any one of claims 1 to 8, wherein the actuator is in power coupling connection with the hydraulic system of the excavator.

10. A power-sharing cluster, comprising:

a plurality of the excavators of claim 9, wherein the first joints of the plurality of the excavators are in communication, the second joints of the plurality of the excavators are in communication, and the third joints of the plurality of the excavators are in communication.