Hydraulic fault detection system and excavator

Abstract

The hydraulic fault detection system comprises an oil supply module, a main control valve, a target element, a control module and pressure detection modules, and the pressure detection modules are arranged at the oil inlet end of the main control valve and the oil inlet end of the target element correspondingly. The pressure detection module can detect real-time pressure parameters of the hydraulic pipeline, the control module conducts pressure judgment on the real-time pressure parameters according to preset reference pressure parameters and sends an abnormity prompt signal to the display instrument when the pressure is judged to be abnormal, and the display instrument is used for conducting abnormity prompt according to the abnormity prompt signal. According to the hydraulic fault detection system, the pressure parameters of the hydraulic pipelines in front of and behind the main control valve can be detected, the detected pressure parameters and the reference pressure are compared and judged, prompting and warning are conducted when it is determined that the hydraulic pressure is abnormal, and therefore automatic fault detection of the hydraulic system is achieved; therefore, the reliability of the hydraulic system of the excavator is improved, and the working efficiency of the excavator is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic system detection, and particularly relates to a hydraulic fault detection system and an excavator. BACKGROUND

[0002] At present, a conventional super-large excavator adopts a hydraulic control system composed of multiple pumps and multiple valves, and a fault of the hydraulic system needs to be checked, diagnosed and repaired to avoid affecting the attendance rate and service life of the excavator.

[0003] However, in actual operation, the operator needs to find the fault of the hydraulic system before performing relevant checking and repairing, that is, the operator needs to rely on manual detection and maintenance, so that if the fault is not found in time and is processed in the later period, the fault of the hydraulic system will be further aggravated or even cannot be repaired, thereby seriously affecting the reliability of the hydraulic system of the excavator and the working efficiency of the excavator.

[0004] Therefore, how to improve the reliability of the hydraulic system of the excavator and improve the working efficiency of the excavator has become a problem to be solved. SUMMARY

[0005] The hydraulic fault detection system and the excavator disclosed by the embodiments of the present application can realize automatic detection of the fault of the hydraulic system, thereby improving the reliability of the hydraulic system of the excavator and improving the working efficiency of the excavator.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses a hydraulic fault detection system, which comprises: an oil supply module, which is used to supply hydraulic oil; a main control valve, an oil inlet end of which is connected with an oil circuit of the oil supply module; a target element, which is connected with an oil outlet end of the main control valve; a control module, which is electrically connected with the main control valve, the oil supply module and an external display instrument respectively, and is used to control position switching of a valve core of the main control valve to control on-off of oil supply of the target element by the oil supply module; a pressure detection module, which is arranged at the oil inlet end of the main control valve and the oil inlet end of the target element respectively, and is electrically connected with the control module, and is used to detect real-time pressure parameters of a hydraulic pipeline; The control module performs pressure judgment on the real-time pressure parameters according to preset reference pressure parameters, and sends an abnormal prompt signal to the display instrument when the pressure judgment is abnormal, and the display instrument is used to perform abnormal prompt according to the abnormal prompt signal.

[0007] As an optional implementation, in the embodiment of the first aspect of the present application, the pressure detection module comprises: a pre-valve pressure detection unit, which is electrically connected with the control module, is arranged at an oil inlet end of the main control valve, and is used for detecting a real-time pressure parameter of the oil inlet end of the main control valve; an execution pressure detection unit, which is electrically connected with the control module, is arranged at an oil inlet end of the target element, and is used for detecting a real-time pressure parameter of the oil inlet end of the target element.

[0008] As an optional implementation, in the embodiment of the first aspect of the present application, the pre-valve pressure detection unit comprises: a plurality of pre-valve pressure sensors, each of which is arranged at a corresponding hydraulic pipeline at the oil inlet end of the main control valve, and is used for detecting a real-time pressure parameter of the corresponding hydraulic pipeline of the main control valve; the execution pressure detection unit comprises: a plurality of element pressure sensors, each of which is arranged at a corresponding hydraulic pipeline at the oil inlet end of the target element, and is used for detecting a real-time pressure parameter of the corresponding hydraulic pipeline of the target element.

[0009] As an optional implementation, in the embodiment of the first aspect of the present application, the target element comprises: a working oil cylinder, which is connected with an oil outlet end of the main control valve, and is used for performing a digging working condition operation according to the hydraulic oil; a walking motor, which is connected with the oil outlet end of the main control valve, and is used for performing a whole machine walking operation according to the hydraulic oil; a slewing motor, which is connected with the oil outlet end of the main control valve, and is used for performing a platform slewing operation according to the hydraulic oil.

[0010] As an optional implementation, in the embodiment of the first aspect of the present application, the system further comprises: a leakage pollution sensor, which is arranged at the walking motor and the slewing motor respectively, is electrically connected with the control module, is used for detecting a metal particle amount of the walking motor and the slewing motor, and the control module is further used for determining a damage degree of the walking motor and a damage degree of the slewing motor according to the metal particle amount.

[0011] As an optional implementation, in the embodiment of the first aspect of the present application, the control module comprises: a controller, which is electrically connected with the display instrument, the main control valve and the oil supply module respectively, and judges the real-time pressure parameter according to a preset reference pressure parameter, and sends an abnormal prompt signal to the display instrument when the pressure is determined to be abnormal; a hand pilot device, which is electrically connected with the controller, and is used for switching the position of the spool of the main control valve through the controller according to an external control signal.

[0012] As an optional implementation, in the embodiment of the first aspect of the present application, the oil supply module comprises: a hydraulic oil tank, which is used for storing the hydraulic oil; a main pump, which is connected with the hydraulic oil tank and the main control valve oil circuit respectively, and is used for pumping the hydraulic oil in the hydraulic oil tank to the main control valve.

[0013] In a second aspect, the present application discloses a excavator, characterized in that comprising: a display instrument; the hydraulic fault detection system as described in the first aspect of the present application, wherein the control module is electrically connected with the display instrument.

[0014] Compared with the prior art, the present application has the following advantages: The hydraulic fault detection system provided by the present application detects the real-time pressure parameters of the front and rear hydraulic pipelines of the main control valve through the pressure detection module, compares and judges the detected pressure parameters with the reference pressure, and gives a prompt warning when the hydraulic pressure is determined to be abnormal, thereby realizing automatic detection of the fault of the hydraulic system, giving a prompt in time when the hydraulic system is abnormal, thereby improving the reliability of the hydraulic system, and the timely fault prompt enables the maintenance personnel to immediately check and repair the hydraulic system of the excavator, so that the excavator can perform the construction work as soon as possible, thereby improving the working efficiency of the excavator.

[0015] The excavator provided by the present application adopts the above-mentioned hydraulic fault detection system, detects the real-time pressure parameters of the front and rear hydraulic pipelines of the main control valve through the pressure detection module, compares and judges the detected pressure parameters with the reference pressure, and gives a prompt warning when the hydraulic pressure is determined to be abnormal, thereby realizing automatic detection of the fault of the hydraulic system, giving a prompt in time when the hydraulic system is abnormal, thereby improving the reliability of the hydraulic system, and the timely fault prompt enables the maintenance personnel to immediately check and repair the hydraulic system of the excavator, so that the excavator can perform the construction work as soon as possible, thereby improving the working efficiency of the excavator. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 a structural schematic diagram of one embodiment of the hydraulic fault detection system in the present application; Figure 2 a structural schematic diagram of another embodiment of the hydraulic fault detection system in the present application; Figure 3 a structural schematic diagram of one specific embodiment of the hydraulic fault detection system in the present application.

[0017] In the drawings, the reference signs have the following meanings: the oil supply module 100, the hydraulic oil tank 110, the main pump 120, the main control valve 200, the target element 300, the working oil cylinder 310, the traveling motor 320, the slewing motor 330, the control module 400, the controller 410, the hand pilot device 420, the pressure detection module 500, the pre-valve pressure detection unit 510, the pre-valve pressure sensor 511, the execution pressure detection unit 520, the element pressure sensor 521, the oil drain pollution sensor 600. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0019] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0021] In addition, the terms "mounting", "arrangement", "provided with", "connected", "linked" should be interpreted broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by the person skilled in the art according to the specific circumstances.

[0022] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0023] The technical solutions of the present application will be further described below in conjunction with the embodiments and the drawings.

[0024] At present, the conventional super large excavator adopts a hydraulic control system composed of multiple pumps + multiple valves, and the fault of the hydraulic system needs to be checked, diagnosed and repaired to avoid affecting the attendance rate and service life of the excavator.

[0025] However, in actual operation, the operator needs to find out the fault of the hydraulic system before carrying out relevant troubleshooting, that is, it needs to rely on manual detection and maintenance, so that if the fault is not found in time and is handled in the later period, the fault of the hydraulic system will be further aggravated or even cannot be repaired, thereby seriously affecting the reliability of the hydraulic system of the excavator and the working efficiency of the excavator.

[0026] Therefore, how to improve the reliability of the hydraulic system of the excavator and improve the working efficiency of the excavator has become a problem to be solved.

[0027] The hydraulic fault detection system and the excavator provided by the embodiment of the present application can realize automatic detection of the fault of the hydraulic system, thereby improving the reliability of the hydraulic system of the excavator and improving the working efficiency of the excavator.

[0028] As Figure 1As shown, the hydraulic fault detection system comprises an oil supply module 100, a master valve 200, a target element 300, a control module 400 and a pressure detection module 500. The oil supply module 100 is used to supply hydraulic oil; the oil inlet end of the master valve 200 is connected with the oil circuit of the oil supply module 100; the target element 300 is connected with the oil outlet end of the master valve 200; the control module 400 is electrically connected with the master valve 200, the oil supply module 100 and an external display instrument, respectively, and is used to control the position switching of the valve core of the master valve 200 to control the on-off of the oil supply of the target element 300 by the oil supply module 100; the pressure detection module 500 is arranged at the oil inlet end of the master valve 200 and the oil inlet end of the target element 300, respectively, and is electrically connected with the control module 400, and is used to detect the real-time pressure parameter of the hydraulic pipeline; wherein the control module 400 judges the real-time pressure parameter according to the preset reference pressure parameter, and sends an abnormal prompt signal to the display instrument when the pressure is judged to be abnormal, and the display instrument is used to give an abnormal prompt according to the abnormal prompt signal.

[0029] In the embodiment, the hydraulic fault detection system is applied to engineering machinery including super large excavators, wherein the target element 300 can perform corresponding actions after receiving hydraulic oil. The master valve 200 is arranged between the oil circuit of the oil supply module 100 and the target element 300, and the operator can control the position of the valve core of the master valve 200 through the control module 400 to control the flow of the system hydraulic pipeline. When the valve core of the master valve 200 makes the oil circuit between the oil supply module 100 and the target element 300 conductive, the target element 300 can perform work based on the received hydraulic oil. It can be understood that a plurality of target elements 300 of different types can be included in the system, and each target element 300 is connected with the corresponding master valve 200.

[0030] The oil inlet end of the master valve 200 and the oil inlet end of the target element 300 are each provided with a pressure detection module 500, the pressure detection module 500 is electrically connected with the control module 400, and the control module 400 is also electrically connected with a display instrument outside the system, which can be arranged in the operating room of the engineering machinery. The pressure detection module 500 obtains the real-time pressure parameter of the hydraulic pipeline before and after the master valve 200 and sends the real-time pressure parameter to the control module 400.

[0031] Real-time pressure parameters include real-time pressure value and real-time pressure change value. Reference pressure parameters include reference pressure value, reference pressure change value, pressure deviation threshold, and pressure change deviation threshold. The control module 400 compares the real-time pressure value with the reference pressure value and compares the real-time pressure change value with the reference pressure change value. If the difference between the real-time pressure value and the reference pressure value is within the pressure deviation threshold, and the difference between the real-time pressure change value and the reference pressure change value is within the pressure change deviation threshold, it indicates that the hydraulic oil pressure in the hydraulic pipeline is normal. If the difference between the real-time pressure value and the reference pressure value exceeds the pressure deviation threshold, or if the difference between the real-time pressure change value and the reference pressure change value exceeds the pressure change deviation threshold, it indicates that the hydraulic oil pressure in the current hydraulic pipeline is abnormal. When an abnormal oil pressure is detected in any one or more hydraulic pipelines in the system, the control module 400 sends an abnormality warning signal to the display instrument. The display instrument can then display the abnormal oil pressure data of the corresponding hydraulic pipeline on the screen based on the abnormality warning signal and generate a relevant alarm.

[0032] As can be seen, the hydraulic fault detection system of the present invention can detect the real-time pressure parameters of the hydraulic pipelines before and after the main control valve 200 through the pressure detection module 500, compare the detected pressure parameters with the reference pressure, and issue a warning when an abnormal hydraulic pressure is detected. This achieves automatic fault detection of the hydraulic system, providing timely alerts when abnormalities occur, thus preventing further aggravation of the hydraulic system faults due to delayed maintenance and improving the reliability of the hydraulic system. Simultaneously, timely and specific fault location alerts allow maintenance personnel to know the location of the fault, enabling rapid troubleshooting and repair of the excavator's hydraulic system, allowing the excavator to resume construction work as soon as possible. Therefore, it improves the efficiency of hydraulic system fault diagnosis and the working efficiency of the excavator.

[0033] like Figure 2 As shown, in an optional embodiment, the pressure detection module 500 includes: a pre-valve pressure detection unit 510 and an execution pressure detection unit 520. The pre-valve pressure detection unit 510 is electrically connected to the control module 400 and is located at the oil inlet of the main control valve 200. The pre-valve pressure detection unit 510 is used to detect the real-time pressure parameters at the oil inlet of the main control valve 200. The execution pressure detection unit 520 is electrically connected to the control module 400 and is located at the oil inlet of the target element 300. The execution pressure detection unit 520 is used to detect the real-time pressure parameters at the oil inlet of the target element 300.

[0034] In the optional embodiment, a valve front pressure detection unit 510 is arranged at the hydraulic pipeline of the oil inlet end of the master valve 200, and the valve front pressure detection unit 510 can detect the real-time pressure parameter of the front end hydraulic pipeline of the master valve 200. An execution pressure detection unit 520 is arranged at the hydraulic pipeline of the oil inlet end of the target element 300, and the execution pressure detection unit 520 can detect the real-time pressure parameter of the hydraulic pipeline between the rear end of the master valve 200 and the target element 300. The control module 400 is electrically connected with the valve front pressure detection unit 510 and the execution pressure detection unit 520 respectively, and the control module 400 can comprehensively detect the real-time pressure parameters detected by the valve front pressure detection unit 510 and the execution pressure detection unit 520, and timely send an abnormal prompt signal to the display instrument when the real-time pressure parameter detected by any one of them is abnormal.

[0035] As can be seen, the optional embodiment can also detect the pressure parameters of the front and rear ends of the master valve 200 through the valve front pressure detection unit 510 and the execution pressure detection unit 520, thereby improving the comprehensiveness of the pressure data acquisition and the accuracy of the pressure fault judgment.

[0036] As shown in Figure 3 , in an optional embodiment, the valve front pressure detection unit 510 includes a plurality of valve front pressure sensors 511, and the execution pressure detection unit 520 includes a plurality of element pressure sensors 521. Each valve front pressure sensor 511 is arranged at a hydraulic pipeline corresponding to the oil inlet end of the master valve 200, and each valve front pressure sensor 511 is used to detect the real-time pressure parameter of the current corresponding hydraulic pipeline of the master valve 200. Each element pressure sensor 521 is arranged at a hydraulic pipeline corresponding to the oil inlet end of the target element 300, and each element pressure sensor 521 is used to detect the real-time pressure parameter of the current corresponding hydraulic pipeline of the target element 300.

[0037] In the optional embodiment, referring to Figure 3 , a plurality of master valves 200 can be included in the system, each master valve 200 is connected with a corresponding group of target element 300 oil circuits, and each group of target element 300 includes a plurality of types of target element 300. The oil inlet end of each master valve 200 is provided with a plurality of hydraulic pipelines, such as two pipelines in Figure 3 , and each hydraulic pipeline is respectively provided with a valve front pressure sensor 511 corresponding thereto. Each hydraulic pipeline at the oil outlet end of the master valve 200 is respectively provided with an element pressure sensor 521 corresponding thereto. Each valve front pressure sensor 511 and each element pressure sensor 521 are electrically connected with the control module 400, and the control module 400 can comprehensively detect the real-time pressure parameters detected by each valve front pressure sensor 511 and each element pressure sensor 521, and timely send an abnormal prompt signal to the display instrument when the real-time pressure parameter detected by any one of the pressure sensors is abnormal.

[0038] It can be seen that the optional embodiment can further detect the pressure parameters of the front and rear ends of the master valve 200 through the plurality of pre-valve pressure sensors 511 and the plurality of element pressure sensors 521, thereby further improving the comprehensiveness of pressure data acquisition and the accuracy of pressure fault judgment.

[0039] As shown in Figure 3 In an optional embodiment, the target element 300 includes a working oil cylinder 310, a traveling motor 320, and a slewing motor 330. The working oil cylinder 310 is connected to the oil outlet of the master valve 200, and is used to perform a digging working condition operation according to the hydraulic oil. The traveling motor 320 is connected to the oil outlet of the master valve 200, and is used to perform a whole machine traveling operation according to the hydraulic oil. The slewing motor 330 is connected to the oil outlet of the master valve 200, and is used to perform a platform slewing operation according to the hydraulic oil.

[0040] In the optional embodiment, each group of target elements 300 includes a working oil cylinder 310, a traveling motor 320, and a slewing motor 330. Each group of working oil cylinders 310, traveling motors 320, and slewing motors 330 are connected to the oil outlet of a corresponding master valve 200. It can be understood that the oil outlet of each master valve 200 has a plurality of oil ports, and different target elements 300 are connected to the corresponding oil port. The type of the working oil cylinder 310 can include a bucket cylinder, a stick cylinder, and a boom cylinder. The working oil cylinder 310 performs a digging working condition operation corresponding to the current type of oil cylinder after receiving the hydraulic oil. The traveling motor 320 can control the track of the engineering machinery to travel after receiving the hydraulic oil. The slewing motor 330 can control the slewing platform of the engineering machinery to rotate after receiving the hydraulic oil.

[0041] As shown in Figure 3 In an optional embodiment, the hydraulic fault detection system further includes a drain pollution sensor 600. The drain pollution sensor 600 is arranged at the traveling motor 320 and the slewing motor 330, respectively. The drain pollution sensor 600 is electrically connected to the control module 400. The drain pollution sensor 600 is used to detect the amount of metal particles of the traveling motor 320 and the slewing motor 330. The control module 400 is further used to determine the damage degree of the traveling motor 320 and the damage degree of the slewing motor 330 according to the amount of metal particles.

[0042] In this optional embodiment, an oil spill contamination sensor 600 may also be provided at the walking motor 320 and the rotary motor 330. The oil spill contamination sensor 600 uses the principle of electromagnetic induction to detect the number of metal particles in the walking motor 320 and the rotary motor 330, thereby determining the degree of motor damage. The data monitored by the oil spill contamination sensor 600 is recorded in real time by the control module 400, and the degree of motor damage is determined by data demodulation, thereby realizing real-time monitoring of the motor's health status.

[0043] As can be seen, this optional embodiment can also provide reliable early warning and life prediction for the hydraulic motor through the oil spill contamination sensor 600.

[0044] like Figure 3 As shown, in an optional embodiment, the control module 400 includes a controller 410 and a manual pilot device 420. The controller 410 is electrically connected to the display instrument, the main control valve 200, and the oil supply module 100, respectively. The controller 410 judges the real-time pressure parameters according to the preset reference pressure parameters, and sends an abnormality prompt signal to the display instrument when the pressure judgment is abnormal. The manual pilot device 420 is electrically connected to the controller 410, and the manual pilot device 420 is used to switch the position of the valve core of the main control valve 200 through the controller 410 according to the external control signal.

[0045] In this optional embodiment, the hand pilot device 420 can be the operating handle of the construction machinery. The operator transmits control electrical signals (such as boom lifting, stick opening and retraction, etc.) to the controller 410 by controlling the operating handle. The controller 410 then outputs a signal to the oil supply module 100 to pump hydraulic oil to the main control valve 200 and outputs a signal to the main control valve 200 to switch the valve core, so that the target element 300 to be controlled can receive hydraulic oil to perform the corresponding work.

[0046] like Figure 3 As shown, in an optional embodiment, the oil supply module 100 includes a hydraulic oil tank 110 and a main pump 120. The hydraulic oil tank 110 is used to store hydraulic oil; the main pump 120 is connected to the hydraulic oil tank 110 and the main control valve 200 respectively, and the main pump 120 is used to pump the hydraulic oil in the hydraulic oil tank 110 to the main control valve 200.

[0047] In this optional embodiment, hydraulic oil is stored in a hydraulic oil tank 110, which is connected to the main pump 120 via an oil circuit. The controller 410 is electrically connected to the main pump 120, and the controller 410 can control the main pump 120 to pump the hydraulic oil in the hydraulic oil tank 110 to the main control valve 200.

[0048] The application further discloses a hydraulic failure detection system of an excavator.

[0049] In the embodiment, the excavator is selected as a super large excavator, the super large excavator adopts a plurality of pumps and a plurality of valves to form a hydraulic system of the whole machine, and therefore, if manual failure detection is adopted for the hydraulic system, there is a complex and difficult situation in checking.

[0050] To this end, in the embodiment, the excavator adopts the hydraulic failure detection system, the real-time pressure parameters of the front and rear hydraulic pipelines of the main control valve 200 can be detected by the pressure detection module 500, the detected pressure parameters are compared with reference pressure to determine whether the hydraulic pressure is abnormal, and a warning is given when the hydraulic pressure is abnormal, so that automatic failure detection of the hydraulic system is realized, the excavator can be timely prompted when the hydraulic system is abnormal, and therefore, the situation that the failure of the hydraulic system is further aggravated due to untimely maintenance is avoided, and the reliability of the hydraulic system is improved. Meanwhile, the timely specific fault position prompt can enable the maintenance personnel to know the fault position, so that the excavator hydraulic system can be quickly checked and repaired, the excavator can perform construction work as soon as possible, and therefore, the failure checking efficiency of the hydraulic system is improved, and the working efficiency of the excavator is improved.

[0051] The technical means disclosed in the application scheme is not limited to the technical means disclosed in the above embodiment, and also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements are also considered to be within the protection scope of the application.

Claims

1. A hydraulic fault detection system, characterized in that, The system includes: The oil supply module is used to supply hydraulic oil; The main control valve, the oil inlet of which is connected to the oil circuit of the oil supply module; The target component is connected to the oil outlet of the main control valve. The control module is electrically connected to the main control valve, the oil supply module and an external display instrument. The control module is used to control the valve core position switching of the main control valve in order to control the on / off of the oil supply module to the target component. A pressure detection module is provided, which is respectively set at the oil inlet end of the main control valve and the oil inlet end of the target element. The pressure detection module is electrically connected to the control module and is used to detect the real-time pressure parameters of the hydraulic pipeline. The control module performs pressure judgment on the real-time pressure parameter based on the preset reference pressure parameter, and sends an abnormality prompt signal to the display instrument when the pressure judgment is abnormal. The display instrument is used to provide an abnormality prompt based on the abnormality prompt signal.

2. The hydraulic fault detection system according to claim 1, characterized in that, The pressure detection module includes: A valve inlet pressure detection unit is electrically connected to the control module. The valve inlet pressure detection unit is located at the oil inlet end of the main control valve and is used to detect the real-time pressure parameters at the oil inlet end of the main control valve. An execution pressure detection unit is electrically connected to the control module. The execution pressure detection unit is located at the oil inlet end of the target element and is used to detect the real-time pressure parameters at the oil inlet end of the target element.

3. The hydraulic fault detection system according to claim 2, characterized in that, The valve inlet pressure detection unit includes: Multiple valve inlet pressure sensors are provided, each of which is located at a hydraulic line corresponding to the oil inlet of the main control valve. Each valve inlet pressure sensor is used to detect the real-time pressure parameters of the hydraulic line currently corresponding to the main control valve. The execution pressure detection unit includes: Multiple component pressure sensors are provided, each component pressure sensor is installed at a hydraulic line corresponding to the oil inlet end of the target component, and each component pressure sensor is used to detect the real-time pressure parameters of the hydraulic line currently corresponding to the target component.

4. The hydraulic fault detection system according to claim 1, characterized in that, The target element includes: The working cylinder is connected to the oil outlet of the main control valve and is used to perform digging operations according to the hydraulic oil. A travel motor is connected to the oil outlet of the main control valve, and the travel motor is used to perform the machine travel operation according to the hydraulic oil. A rotary motor is connected to the oil outlet of the main control valve, and the rotary motor is used to perform platform rotation operation according to the hydraulic oil.

5. The hydraulic fault detection system according to claim 4, characterized in that, The system also includes: An oil spill contamination sensor is provided, which is respectively installed at the walking motor and the rotary motor. The oil spill contamination sensor is electrically connected to the control module. The oil spill contamination sensor is used to detect the amount of metal particles in the walking motor and the rotary motor. The control module is also used to determine the degree of damage to the walking motor and the rotary motor based on the amount of metal particles.

6. The hydraulic fault detection system according to any one of claims 1 to 5, characterized in that, The control module includes: The controller is electrically connected to the display instrument, the main control valve and the oil supply module respectively. The controller judges the real-time pressure parameter according to the preset reference pressure parameter, and sends an abnormality prompt signal to the display instrument when the pressure judgment is abnormal. A manual pilot device is electrically connected to the controller. The manual pilot device is used to switch the position of the valve core of the main control valve through the controller according to an external control signal.

7. The hydraulic fault detection system according to any one of claims 1 to 5, characterized in that, The oil supply module includes: A hydraulic oil tank, used to store the hydraulic oil; The main pump is connected to the hydraulic oil tank and the main control valve oil circuit, and is used to pump the hydraulic oil in the hydraulic oil tank to the main control valve.

8. An excavator, characterized in that, The excavator includes: Display instruments; The hydraulic fault detection system according to any one of claims 1 to 7, wherein the control module is electrically connected to the display instrument.

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