Multifunctional crane wet clutch performance testing device and platform

Abstract

The invention provides a multifunctional crane wet clutch performance test device and platform, the device comprises a clutch system, a sensing system and a control system, the clutch system is used for carrying out dynamic performance test on a wet clutch under different working conditions; the sensing system is used for monitoring performance data in real time when a dynamic performance test is carried out on the clutch system; and the control system is used for acquiring data of the sensing system through a signal line, processing the data and controlling the proportion of a pressure reducing valve of the clutch system. The platform comprises a measurement and control interface and a monitoring interface, and the measurement and control interface is used for displaying sensor values collected by a sensing system in real time and displaying a hysteresis curve in real time; and the monitoring interface is used for displaying the relationship among the current, the voltage, the pressure and the torque, monitoring the state of the performance testing device in real time, and performing alarm prompt and control protection when an abnormal condition occurs. The pressure change of the brake cavity and the clutch cavity of the clutch can be accurately controlled.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to a multifunctional crane wet clutch performance testing device and platform. Background Art

[0002] Multifunctional crawler crane is a kind of all-terrain lifting equipment that relies on crawler tracks for walking. It is widely used in high-altitude lifting, disaster relief, engineering construction, road and bridge construction and other fields. With the continuous increase in market demand, crawler cranes are no longer simply used for load lifting and power decentralization. They have added strong tamping mode, SDDC mode, material shaking mode and grab bucket mode with free drop hook as the core technology. Air load braking is an extremely important part of free drop hook technology. It can not only ensure the safe and controllable decentralization of the load and realize air load braking, but also greatly improve construction efficiency, reduce construction energy consumption and expand the use conditions. Improving the dynamic braking performance of free drop hook can greatly improve product competitiveness and improve the overall energy efficiency of equipment. The wet clutch module and its control oil circuit of the crane equipment reducer assembly are the core components for realizing free drop hook and dynamic braking functions. Therefore, the research on the performance test platform and application of the wet clutch of multifunctional crane is of special significance.

[0003] The working principle of the free-fall hook is to use the winch to lift the load to a certain height. When the free-fall hook button is opened, the winch and the clutch are separated during the process of releasing the pedal. The load falls freely with the wire rope due to its own weight. During this process, the clutch and winch can be fully or partially combined by changing the pedal angle, so as to achieve the purpose of braking or reducing the load descent speed.

[0004] In actual engineering applications, when the winch reducer wet clutch is working, the accuracy and stability of the pressure signal of the control oil circuit are poor, and there is a complex nonlinear relationship between the control pressure and the clutch braking torque. This causes a deviation between the critical position when the free drop hook is opened and when braking, the linearity between the pedal control signal and the clutch braking torque is poor, and the dynamic stability of the braking process is poor. This leads to uncertainty in the driver's grasp of the braking force during the braking process, resulting in a large braking shock. This makes the load run unsteady, which has a great impact on the service life of the boom and pulley block and the wear of the wire rope.

[0005] After massive searches, the prior art was found: Publication No. CN202770629U discloses a clutch test bench, which is composed of a fixing mechanism for fixing the clutch housing and a force-applying mechanism with a pressure detection device; the fixing mechanism is composed of a fixed oil cylinder assembly with a fixed oil cylinder and a fixed piston rod and a clutch housing fixing member arranged at the end of the fixed piston rod; the force-applying mechanism is composed of a force-applying oil cylinder arranged in the fixed piston rod and a force-applying piston rod that cooperates with the force-applying oil cylinder and acts on the clutch spring to be tested, and the pressure detection device is arranged at the end of the force-applying piston rod. At present, the test device for the wet clutch friction pair is too complicated in structure, and can only simulate the influence of different influencing factors on the engagement characteristics of the wet friction pair under a single starting condition. Application No. CN110530634A discloses a vehicle wet dual-clutch automatic transmission test bench system, which simulates the influence of different factors under the wet clutch starting condition and can effectively measure the wet clutch temperature inside the vehicle wet dual-clutch automatic transmission in real time. Application No. CN107202695A discloses a high-torque liquid-viscous clutch test device, which has the functions of simulating soft start, heavy-load start and power balance test of scraper conveyor, and explores the temperature distribution law of friction pair surface under high torque by arranging temperature sensors on friction plates. Application No. CN110259849A discloses a liquid-viscous speed-regulating clutch with coaxial and same-side output. The coaxial and same-side output greatly reduces the clutch volume, improves the clutch power, and prolongs the clutch service life.

[0006] The wet clutch performance test platforms currently designed and developed are mostly aimed at testing the static torque transmission characteristics of the clutch, and there are few wet clutch dynamic performance tests. At the same time, most existing test platforms lack the ability to accurately control the oil circuit pressure, cannot achieve braking simulation under different working conditions, and cannot provide effective data support for the analysis of the nonlinear relationship between control pressure and clutch braking torque. Summary of the invention

[0007] According to the technical problems raised above, a multifunctional crane wet clutch performance test device and platform are provided. The present invention is used to realize the dynamic performance test of the wet clutch and the control effect verification of different flexible braking strategies. The test platform can realize the dynamic follow-up control of the braking pressure and the real-time analysis of the clutch braking pressure-torque characteristics.

[0008] The technical means adopted by the present invention are as follows:

[0009] A multifunctional crane wet clutch performance test device comprises: a clutch system, a sensor system and a control system, wherein the sensor system is embedded in the clutch system, and the sensor system and the clutch system are connected to the control system via a signal line, wherein:

[0010] The clutch system is used to perform dynamic performance testing on the wet clutch under different working conditions;

[0011] The sensing system is used to monitor performance data in real time when performing dynamic performance testing on the clutch system;

[0012] The control system obtains data from the sensor system through the signal line for data processing and controls the ratio of the pressure reducing valve of the clutch system.

[0013] Furthermore, the clutch system includes: a servo motor, a clutch of the reducer to be tested, a high-pressure oil pump station, a clutch chamber proportional pressure reducing valve, a brake chamber proportional pressure reducing valve and a cooling oil pump station, wherein:

[0014] The servo motor is connected to the input shaft of the clutch of the speed reducer under test through a coupling, and is used to provide kinetic energy for the coupling to connect the clutch of the speed reducer under test when performing a performance test;

[0015] The high-pressure oil pump station is connected to the input ends of the clutch chamber proportional pressure reducing valve and the brake chamber proportional pressure reducing valve respectively, and is used to pump cooling oil into the clutch chamber proportional pressure reducing valve and the brake chamber proportional pressure reducing valve;

[0016] The input end of the clutch chamber proportional pressure reducing valve is connected to the high-pressure oil pump station, and the output end is connected to the clutch chamber of the clutch of the speed reducer under test; the input end of the brake chamber proportional pressure reducing valve is connected to the high-pressure oil pump station, and the output end is connected to the brake chamber of the clutch of the speed reducer under test;

[0017] The cooling oil pump station is connected to the clutch of the speed reducer under test, and the cooling oil is circulated in the clutch of the speed reducer under test through the hydraulic pipeline.

[0018] Further, the sensing system includes: a speed torque sensor, a first current sensor, a second current sensor, a temperature sensor, a first pressure sensor, a second pressure sensor and a third pressure sensor, wherein:

[0019] One end of the speed and torque sensor is connected to the servo motor through a first coupling, and the other end is connected to the clutch of the speed reducer under test through a second coupling, so as to monitor the speed and torque of the clutch of the speed reducer under test in real time;

[0020] One end of the first current sensor is connected to the amplifier, and the other end is connected to the brake chamber proportional pressure reducing valve; one end of the second current sensor is connected to the amplifier, and the other end is connected to the clutch chamber proportional pressure reducing valve; the temperature sensor is connected to the high-pressure oil pump station;

[0021] One end of the first pressure sensor is connected to the clutch chamber proportional pressure reducing valve, and the other end is connected to the clutch of the reducer under test; one end of the second pressure sensor is connected to the brake chamber proportional pressure reducing valve, and the other end is connected to the clutch of the reducer under test; one end of the third pressure sensor is connected to the high-pressure oil pump station, and the other end is respectively connected to the clutch chamber proportional pressure reducing valve and the brake chamber proportional pressure reducing valve.

[0022] Furthermore, the control system includes: a signal control acquisition instrument, a NI signal acquisition board, an amplifier and a terminal block, wherein:

[0023] The terminal block is connected to the sensor system through a signal line, and the signal of the sensor system is input into the NI signal acquisition board; one end of the NI signal acquisition board is connected to the terminal block, and the other end is connected to the signal control acquisition instrument. The NI signal acquisition board summarizes the information and sends it to the signal control acquisition instrument. The signal control acquisition instrument performs data processing and transmits the control signal to the NI signal acquisition board. The NI signal acquisition board is connected to the amplifier and outputs the control signal to the amplifier. The output ends of the amplifier are respectively connected to the clutch chamber proportional pressure reducing valve and the brake chamber proportional pressure reducing valve, so as to control the opening and closing of the pressure reducing valve according to the control signal.

[0024] The present invention also includes a multifunctional crane wet clutch performance test platform, including: a measurement and control interface and a monitoring interface, wherein:

[0025] The measurement and control interface is used to display the sensor values ​​collected by the sensor system in real time and to display the hysteresis curve in real time;

[0026] The monitoring interface is used to display the relationship between current, voltage, pressure and torque, and monitor the status of the performance test device in real time, and issue an alarm and control protection when an abnormal situation occurs.

[0027] Furthermore, the measurement and control interface displays the data collected in the sensor system through a dial, including:

[0028] The actual current value measured by the first current sensor is recorded as A1, the actual current value measured by the second current sensor is recorded as A2, the actual pressure value measured by the first pressure sensor is recorded as P1, the actual pressure value measured by the second pressure sensor is recorded as P2, the pressure value measured by the third pressure sensor is recorded as P3, the actual value of the oil temperature measured by the temperature sensor is recorded as T, the actual speed value measured by the speed and torque sensor is recorded as N1, and the actual torque value is recorded as N2.

[0029] Furthermore, the monitoring interface monitors the pressure, oil temperature, oil contamination, filter element blockage, liquid level, and motor status in real time. When the data in the monitoring interface exceeds the set range, an alarm is issued and the control device stops working.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The multifunctional crane wet clutch performance testing device and platform provided by the present invention can not only provide a testing platform for the static and dynamic control effects of the clutch flexible braking control strategy, but also accurately control the pressure changes in the clutch brake chamber and the clutch chamber, thereby realizing dynamic performance testing of the clutch under all working conditions.

[0032] Based on the above reasons, the present invention can be widely promoted in the technical field of engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 It is a structural schematic diagram of the multifunctional crane clutch performance testing device of the present invention.

[0035] Figure 2 The present invention is a hydraulic principle diagram of a multifunctional crane clutch performance testing device.

[0036] Figure 3 This is an interface diagram of the multifunctional crane clutch performance testing platform of the present invention.

[0037] In the figure: 101, servo motor; 102, first coupling; 103, speed torque sensor; 104, second coupling; 105, clutch of the reducer under test; 106, signal control acquisition instrument; 107, NI signal acquisition board; 108, amplifier; 109, high-pressure oil pump station; 110, clutch chamber proportional pressure reducing valve; 111, brake chamber proportional pressure reducing valve; 112, first current sensor; 113, second current sensor; 114, temperature sensor; 115, first pressure sensor; 116, second pressure sensor; 117, third pressure sensor; 118, cooling oil pump station; 119, terminal block. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] like Figure 1 As shown, the present invention provides a multifunctional crane wet clutch performance test device, comprising: a clutch system, a sensor system and a control system, wherein the sensor system is embedded in the clutch system, and the sensor system and the clutch system are connected to the control system via a signal line, wherein:

[0046] The clutch system is used to perform dynamic performance testing on the wet clutch under different working conditions;

[0047] The sensing system is used to monitor the performance data in real time when the clutch system is subjected to a dynamic performance test;

[0048] The control system obtains data from the sensor system through the signal line for data processing and controls the ratio of the pressure reducing valve of the clutch system.

[0049] In specific implementation, as a preferred embodiment of the present invention, the clutch system includes: a servo motor 101, a clutch of a reducer to be tested 105, a high-pressure oil pump station 109, a clutch chamber proportional pressure reducing valve 110, a brake chamber proportional pressure reducing valve 111 and a cooling oil pump station 118, wherein:

[0050] The servo motor 101 is connected to the input shaft of the speed reducer clutch 105 under test through a coupling, and is used to provide kinetic energy for the coupling to connect the speed reducer clutch 105 under test when performing a performance test;

[0051] The high-pressure oil pump station 109 is connected to the input ends of the clutch chamber proportional pressure reducing valve 110 and the brake chamber proportional pressure reducing valve 111, respectively, and is used to pump cooling oil into the clutch chamber proportional pressure reducing valve 110 and the brake chamber proportional pressure reducing valve 111;

[0052] The input end of the clutch chamber proportional pressure reducing valve 110 is connected to the high-pressure oil pump station 109, and the output end is connected to the clutch chamber of the clutch 105 of the measured reducer. The input end of the brake chamber proportional pressure reducing valve 111 is connected to the high-pressure oil pump station 109, and the output end is connected to the brake chamber of the clutch 105 of the measured reducer.

[0053] The cooling oil pump station 118 is connected to the clutch 105 of the speed reducer under test, and allows the cooling oil to circulate in the clutch 105 of the speed reducer under test through a hydraulic pipeline.

[0054] In specific implementation, as a preferred embodiment of the present invention, the sensing system includes: a speed torque sensor 103, a first current sensor 112, a second current sensor 113, a temperature sensor 114, a first pressure sensor 115, a second pressure sensor 116 and a third pressure sensor 117, wherein:

[0055] One end of the speed torque sensor 103 is connected to the servo motor 101 through the first coupling 102, and the other end is connected to the measured reducer clutch 105 through the second coupling 104, so as to monitor the speed and torque of the measured reducer clutch 105 in real time;

[0056] One end of the first current sensor 112 is connected to the amplifier 118, and the other end is connected to the brake chamber proportional pressure reducing valve 111; one end of the second current sensor 113 is connected to the amplifier 118, and the other end is connected to the clutch chamber proportional pressure reducing valve 110; the temperature sensor 114 is connected to the high-pressure oil pump station 109;

[0057] One end of the first pressure sensor 115 is connected to the clutch chamber proportional pressure reducing valve 110, and the other end is connected to the clutch 105 of the reducer under test; one end of the second pressure sensor 116 is connected to the brake chamber proportional pressure reducing valve 111, and the other end is connected to the clutch 105 of the reducer under test; one end of the third pressure sensor 117 is connected to the high-pressure oil pump station 109, and the other end is respectively connected to the clutch chamber proportional pressure reducing valve 110 and the brake chamber proportional pressure reducing valve 111.

[0058] In specific implementation, as a preferred embodiment of the present invention, the control system includes: a signal control acquisition instrument 106, an NI signal acquisition board 107, an amplifier 108 and a terminal block 119, wherein:

[0059] The terminal block 119 is connected to the sensor system through a signal line, and inputs the signal of the sensor system to the NI signal acquisition board 107; one end of the NI signal acquisition board 107 is connected to the terminal block 119, and the other end is connected to the signal control acquisition instrument 106. The NI signal acquisition board 107 summarizes the information and sends it to the signal control acquisition instrument 106. The signal control acquisition instrument 106 performs data processing and transmits the control signal to the NI signal acquisition board 107. The NI signal acquisition board 107 is connected to the amplifier 108 and outputs the control signal to the amplifier 108. The output ends of the amplifier 108 are respectively connected to the clutch chamber proportional pressure reducing valve 110 and the brake chamber proportional pressure reducing valve 111, which are used to control the opening and closing of the pressure reducing valve according to the control signal.

[0060] The present invention also includes a multifunctional crane wet clutch performance test platform, including: a measurement and control interface and a monitoring interface, wherein:

[0061] The measurement and control interface is used to display the sensor values ​​collected by the sensor system in real time and to display the hysteresis curve in real time;

[0062] The monitoring interface is used to display the relationship between current, voltage, pressure and torque, and monitor the status of the performance test device in real time, and issue an alarm and control protection when an abnormal situation occurs.

[0063] In specific implementation, as a preferred embodiment of the present invention, the measurement and control interface displays the data collected in the sensor system through a dial, including:

[0064] The actual current value measured by the first current sensor 112 is recorded as A1, the actual current value measured by the second current sensor 113 is recorded as A2, the actual pressure value measured by the first pressure sensor 115 is recorded as P1, the actual pressure value measured by the second pressure sensor 116 is recorded as P2, the pressure value measured by the third pressure sensor 117 is recorded as P3, the actual value of the oil temperature measured by the temperature sensor 114 is recorded as T, the actual speed value measured by the speed and torque sensor 103 is recorded as N1, and the actual torque value is recorded as N2.

[0065] The data of each display interface of the measurement and control interface can be saved to facilitate the corresponding data processing later.

[0066] In specific implementation, as a preferred embodiment of the present invention, the monitoring interface monitors the pressure, oil temperature, oil contamination, filter element blockage, liquid level, and motor status in real time. When the data in the monitoring interface exceeds the set range, an alarm is issued and the control device stops working.

[0067] At the time of implementation, there are four monitoring interfaces:

[0068] Time t-triangle wave voltage, current A1, current A2, clutch chamber pressure P1 display interface.

[0069] Time t-brake chamber pressure P2, reducer input end torque N2 display interface.

[0070] Brake chamber pressure P2-reducer input end torque N2 display interface.

[0071] Brake chamber pressure reducing valve input current A2-speed reducer input torque N2 display interface

[0072] During implementation, the test platform uses CAN communication to set the speed and torque of the servo motor, thereby controlling the input speed and torque of the reducer. The NI board serves as the control input and outputs a triangular wave signal in the form of a voltage signal. When the board outputs a triangular wave signal with adjustable amplitude and frequency, the amplifier converts the corresponding voltage signal into a current signal in the form of PWM, thereby controlling the opening of the pressure reducing valve. Between the amplifier and the two pressure reducing valves, a current sensor is connected in series to detect the magnitude of the current. At the same time, the pressure sensors at the clutch chamber input port, the brake chamber input port, and the pressure reducing valve front port are used to detect the clutch chamber pressure, the brake chamber pressure, and the pressure reducing valve inlet pressure. The speed torque sensor is installed on the input shaft of the reducer to detect the input shaft torque. The clutch output torque can be obtained by converting the reduction ratio. The NI board + labview is used to set the triangular wave current and monitor the various data of the experimental test. The signal acquisition controller uses a proportional pressure reducing valve to adjust the pressure in proportion to the test requirements, which makes it easy for the operator to control the oil source pressure at any time. Under the control of the control system and control program, the pressure in the two chambers is compared and adjusted based on the feedback of the measured values ​​of the pressure and the given value. The controller automatically adjusts according to the given control method to accurately follow the changes in the control signal.

[0073] The signal acquisition controller of the present invention is programmed with labview software and used in conjunction with the NI signal acquisition board. Two signal given modules, the signal form can be divided into triangular wave signal given and constant value signal given, respectively providing voltage control signals for the brake chamber pressure reducing valve and the clutch chamber pressure reducing valve, which are converted into PWM current signals through the XMD-02 amplifier. The triangular wave signal can adjust the frequency and amplitude of the given signal.

[0074] Example 1

[0075] like Figure 1 As shown, the present invention provides a multifunctional crane clutch performance test device and platform. In this embodiment, when performing a clutch dynamic performance test, if a clutch brake chamber and clutch chamber pressure matching test of the tested reducer clutch 105 is required, through the above-mentioned hardware and software and control system configuration, the test process is as follows:

[0076] Set the initial conditions: the clutch chamber proportional pressure reducing valve input current is 0mA, the brake chamber proportional pressure reducing valve input current is 0mA, the motor speed is 0r / min, the high-pressure oil pump station is started, and the output oil pressure is set to 60bar;

[0077] Adjust the clutch chamber proportional pressure reducing valve to stabilize the clutch chamber pressure at 50 bar; start the motor and set the speed to stabilize at 900 r / min.

[0078] The signal acquisition controller gives the brake chamber proportional pressure reducing valve control signal (PWM current signal). The signal is in the form of a triangular wave signal with a period of 10s. The brake force pressure is adjusted from 0bar to 50bar and then dropped to 0bar. The brake chamber pressure-clutch output torque curve and the pressure reducing valve input current-clutch output torque curve under this pressure matching relationship are obtained.

[0079] After the signal cycle input is completed, the motor speed returns to stability, the motor stops, the proportional relief valve at the oil source is adjusted to zero, the clutch chamber reversing valve is powered off, the experimental data is saved, the experimental phenomena are recorded, the above process is repeated 5 times, the experimental data of each time is saved, the pressure matching relationship is changed, and the above process is repeated to obtain the brake chamber pressure-clutch output torque curve and the pressure reducing valve input current-clutch output torque curve under different pressure matching relationships.

[0080] Example 2

[0081] In this embodiment, when the dynamic performance test of the clutch is carried out, if it is necessary to carry out the relationship between the dynamic and static state transformation of the clutch brake chamber control signal of the tested reducer clutch 105 and the clutch output torque, through the above-mentioned hardware and software and control system configuration, the test process is as follows:

[0082] Set the initial conditions: the clutch chamber proportional pressure reducing valve input current is 0mA, the brake chamber proportional pressure reducing valve input current is 0mA, the motor speed is 0r / min, the high-pressure oil pump station is started, and the output oil pressure is set to 80bar; adjust the clutch chamber proportional pressure reducing valve to stabilize the clutch chamber pressure at 70bar, start the motor, and set the speed to stabilize at 900r / min.

[0083] Given a proportional pressure reducing valve control signal (PWM current signal), the signal is in the form of a special waveform signal with a period of 30s. The brake force pressure is adjusted from 0bar to 70bar and then stabilized at 35bar, maintained for 15s to obtain the brake chamber pressure-clutch output torque curve under static pressure difference and the pressure reducing valve input current-clutch output torque curve.

[0084] After the signal cycle input is completed, the motor speed returns to stability, the motor stops, the proportional relief valve at the oil source is adjusted to zero, the clutch chamber reversing valve is powered off, the experimental data is saved, and the experimental phenomena are recorded.

[0085] Repeat the above process 5 times, save the experimental data of each time, change the stable value of the brake chamber pressure, and repeat the above process to obtain the brake chamber pressure-clutch output torque curve and the pressure reducing valve input current-clutch output torque curve under fixed pressure difference.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional crane wet clutch performance test device, characterized in that: include: A clutch system, a sensor system and a control system, wherein the sensor system is embedded in the clutch system, and the sensor system and the clutch system are connected to the control system via a signal line, wherein: The clutch system is used to perform dynamic performance testing on the wet clutch under different working conditions; The sensing system is used to monitor performance data in real time when performing dynamic performance testing on the clutch system; The control system obtains data from the sensor system through the signal line for data processing and controls the ratio of the pressure reducing valve of the clutch system.

2. The multifunctional crane wet clutch performance testing device according to claim 1 is characterized in that: The clutch system comprises: a servo motor (101), a clutch of a speed reducer to be tested (105), a high-pressure oil pump station (109), a clutch chamber proportional pressure reducing valve (110), a brake chamber proportional pressure reducing valve (111) and a cooling oil pump station (118), wherein: The servo motor (101) is connected to the input shaft of the speed reducer clutch (105) to be tested via a coupling, and is used to provide kinetic energy for the coupling to connect to the speed reducer clutch (105) to be tested when performing a performance test; The high-pressure oil pump station (109) is respectively connected to the input ends of the clutch chamber proportional pressure reducing valve (110) and the brake chamber proportional pressure reducing valve (111), and is used to pump cooling oil into the clutch chamber proportional pressure reducing valve (110) and the brake chamber proportional pressure reducing valve (111); The input end of the clutch chamber proportional pressure reducing valve (110) is connected to the high-pressure oil pump station (109), and the output end is connected to the clutch chamber of the clutch (105) of the measured reducer; the input end of the brake chamber proportional pressure reducing valve (111) is connected to the high-pressure oil pump station (109), and the output end is connected to the brake chamber of the clutch (105) of the measured reducer; The cooling oil pump station (118) is connected to the clutch of the speed reducer (105) to be tested, and allows the cooling oil to circulate in the clutch of the speed reducer (105) to be tested through a hydraulic pipeline.

3. The multifunctional crane wet clutch performance testing device according to claim 1 is characterized in that: The sensing system comprises: a speed torque sensor (103), a first current sensor (112), a second current sensor (113), a temperature sensor (114), a first pressure sensor (115), a second pressure sensor (116) and a third pressure sensor (117), wherein: One end of the speed and torque sensor (103) is connected to the servo motor (101) via a first coupling (102), and the other end is connected to the measured reducer clutch (105) via a second coupling (104), so as to monitor the speed and torque of the measured reducer clutch (105) in real time; One end of the first current sensor (112) is connected to an amplifier (118), and the other end is connected to a brake chamber proportional pressure reducing valve (111); one end of the second current sensor (113) is connected to an amplifier (118), and the other end is connected to a clutch chamber proportional pressure reducing valve (110); the temperature sensor (114) is connected to a high-pressure oil pump station (109); One end of the first pressure sensor (115) is connected to the clutch chamber proportional pressure reducing valve (110), and the other end is connected to the clutch (105) of the reducer under test; one end of the second pressure sensor (116) is connected to the brake chamber proportional pressure reducing valve (111), and the other end is connected to the clutch (105) of the reducer under test; one end of the third pressure sensor (117) is connected to the high-pressure oil pump station (109), and the other end is respectively connected to the clutch chamber proportional pressure reducing valve (110) and the brake chamber proportional pressure reducing valve (111).

4. The multifunctional crane wet clutch performance testing device according to claim 1 is characterized in that: The control system comprises: a signal control acquisition instrument (106), a NI signal acquisition board (107), an amplifier (108) and a terminal block (119), wherein: The terminal block (119) is connected to the sensor system via a signal line, and inputs the signal of the sensor system to the NI signal acquisition board (107); one end of the NI signal acquisition board (107) is connected to the terminal block (119), and the other end is connected to the signal control acquisition instrument (106); the NI signal acquisition board (107) aggregates the information and sends it to the signal control acquisition instrument (106); the signal control acquisition instrument (106) performs data processing and transmits the control signal to the NI signal acquisition board (107); the NI signal acquisition board (107) is connected to the amplifier (108) and outputs the control signal to the amplifier (108); the output end of the amplifier (108) is respectively connected to the clutch chamber proportional pressure reducing valve (110) and the brake chamber proportional pressure reducing valve (111), and is used to control the opening and closing of the pressure reducing valve according to the control signal.

5. A multifunctional crane wet clutch performance test platform, characterized in that: include: Measurement and control interface and monitoring interface, including: The measurement and control interface is used to display the sensor values ​​collected by the sensor system in real time and to display the hysteresis curve in real time; The monitoring interface is used to display the relationship between current, voltage, pressure and torque, and monitor the status of the performance test device in real time, and issue an alarm and control protection when an abnormal situation occurs.

6. The multifunctional crane wet clutch performance test platform according to claim 5 is characterized in that: The measurement and control interface displays the data collected in the sensor system through a dial, including: The actual current value measured by the first current sensor (112) is recorded as A1, the actual current value measured by the second current sensor (113) is recorded as A2, the actual pressure value measured by the first pressure sensor (115) is recorded as P1, the actual pressure value measured by the second pressure sensor (116) is recorded as P2, the pressure value measured by the third pressure sensor (117) is recorded as P3, the actual oil temperature value measured by the temperature sensor (114) is recorded as T, the actual speed value measured by the speed torque sensor (103) is recorded as N1, and the actual torque value is recorded as N2.

7. The multifunctional crane wet clutch performance test platform according to claim 5 is characterized in that: The monitoring interface monitors the pressure, oil temperature, oil contamination, filter element blockage, liquid level, and motor status in real time. When the data in the monitoring interface exceeds the set range, an alarm is issued and the control device stops working.

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