CN114183413A

CN114183413A - Detection device for central swivel joint and vehicle

Info

Publication number: CN114183413A
Application number: CN202111523901.5A
Authority: CN
Inventors: 占自涛; 邹波
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-03-15

Abstract

The invention provides a detection device of a central rotary joint and a vehicle. The detection device includes: the motor is connected with the central rotary joint; the outlet of the variable pump is connected with the oil inlet of the central rotary joint; the first reversing valve is arranged on the outlet side of the variable pump and used for controlling the oil inlet and the oil outlet of the central rotary joint to be switched; the pressure regulating module is arranged on an oil inlet oil way and an oil return oil way of the central rotary joint; the connecting pipe is arranged between two working oil passages with the aperture difference smaller than a preset threshold value; and the controller is respectively connected with the motor, the variable pump, the first reversing valve and the pressure regulating module so as to control the motor, the variable pump, the first reversing valve and the pressure regulating module. The detection device provided by the invention can be used for carrying out various performance tests and durability life tests on the central adapter and can avoid the problem of winding of the connecting pipe during continuous rotation.

Description

Detection device for central swivel joint and vehicle

Technical Field

The invention relates to the technical field of central rotary joints, in particular to a detection device of a central rotary joint and a vehicle.

Background

The central swivel joint is a key part applied to relative rotary mechanical equipment for getting on and off a vehicle, is generally arranged between a hydraulic pipeline for getting on the vehicle and a hydraulic pipeline for getting off the vehicle, plays a role in transitional connection, avoids bending, winding and breaking of a hydraulic hose during rotation when ensuring that a platform for getting on the vehicle can freely rotate for 360 degrees relative to the platform for getting off the vehicle, has the characteristics of small rotary moment, flexible rotation, high bearing pressure, good sealing and durability, convenient arrangement, high space utilization rate and the like, and is widely applied to hydraulic systems of equipment such as excavators, cranes, rotary drilling rigs, fire trucks and the like.

In view of the great influence of the quality of the central rotary joint on the rotary stability, reliability and safety of the vehicle, the central rotary joint needs to be subjected to continuous rotary tests, and the performance and durability of the central rotary joint are detected to meet the design requirements.

Disclosure of Invention

The present invention is directed to solving or improving at least one of the technical problems of the prior art or the related art.

To this end, the invention provides, in a first aspect, a device for detecting a central swivel joint.

A second aspect of the invention provides a vehicle.

In view of the above, according to a first aspect of the present invention, a detection device for a central swivel joint is provided, the central swivel joint including at least two working oil passages, the detection device for a central swivel joint including: the motor is connected with the central rotary joint and is used for driving the central rotary joint to rotate; the outlet of the variable pump is connected with the oil inlet of the central rotary joint, and the variable pump is used for outputting pressure oil to the central rotary joint; the first reversing valve is arranged on the outlet side of the variable pump and used for controlling the oil inlet and the oil outlet of the central rotary joint to be switched; the pressure regulating module is arranged on an oil inlet oil way and an oil return oil way of the central rotary joint and is used for regulating the oil way pressure of the oil inlet oil way and the oil return oil way; the connecting pipe is arranged between two working oil passages with the aperture difference smaller than a preset threshold value in the at least two working oil passages so as to communicate the two working oil passages; and the controller is respectively connected with the motor, the variable pump, the first reversing valve and the pressure regulating module so as to control the motor, the variable pump, the first reversing valve and the pressure regulating module.

The invention provides a detection device of a central rotary joint, which comprises a motor, a variable pump, a first reversing valve, a pressure regulating module, a connecting pipe and a controller. The controller is respectively connected with the motor, the variable pump, the first reversing valve and the pressure regulating module to control the motor, the variable pump, the first reversing valve and the pressure regulating module. The motor can be controlled by the controller to rotate positively and reversely and rotate at the same speed, and the rotation time is long, so that the central rotary joint can be controlled to rotate, the control is accurate, the response is rapid, and on the basis, the performance test and the durability test of the central rotary joint can be conveniently performed by the detection device. The variable pump provides variable-flow pressure oil for the first reversing valve, the pressure oil flows to an oil inlet of a working oil duct of the tested central swivel joint through the first reversing valve, and the controller can control the debugging motor to drive the central swivel joint to achieve the required rotating speed and turn according to detection requirements. At the moment, the pressure oil enters the working oil passage of the central rotary joint and enters the other working oil passage through the connecting pipe. And then, returning oil through the first reversing valve. The pressure regulating modules are arranged on the oil inlet oil way and the oil return oil way, and the oil way pressure of the oil inlet oil way and/or the oil return oil way can be regulated through the pressure regulating modules, so that the pressure loss of the working oil way under different flow rates can be conveniently tested, and the load pressure can be ensured not to be influenced by flow rate change basically.

In addition, the connecting pipe is arranged between the oil ducts with the similar apertures of the central rotary joint, so that the problem of winding of the connecting pipe during continuous rotation can be avoided, and the reliability of the whole detection device can be improved.

In addition, an oil inlet of the central rotary joint is provided with a first reversing valve, so that an impact resistance test of the central rotary joint is conveniently carried out.

The detection device for the central swivel joint according to the present invention may further include:

in the above technical solution, the voltage regulating module includes: the first pressure regulating valve is arranged on an oil return oil way of the central rotary joint and is used for regulating the oil way pressure of the oil return oil way; and the second pressure regulating valve is positioned on the outlet side of the variable displacement pump and arranged on an oil path between the oil inlet oil path and the oil return oil path, and is used for regulating the oil path pressure of the oil inlet oil path and the oil return oil path.

In this technical scheme, the pressure regulating module includes first pressure regulating valve and second pressure regulating valve. The first pressure regulating valve is arranged on an oil return path of the central rotary joint to regulate the pressure of the oil return path. The second pressure regulating valve is arranged on the outlet side of the variable displacement pump and arranged on an oil path between the oil inlet oil path and the oil return oil path so as to regulate the oil path pressure of the oil inlet oil path and the oil return oil path. The load pressure of the working oil passage of the central swivel joint is changed by adjusting the first pressure regulating valve and the second pressure regulating valve, so that the load pressure is basically not influenced by flow change.

Specifically, the first pressure regulating valve and the second pressure regulating valve are both electromagnetic proportional overflow valves.

In any of the above technical solutions, the method further includes: the second reversing valve is arranged on the oil return path and is used for controlling the on-off of the oil return path and at least two oil return branches which are connected with the oil return path in parallel; and the flow detection module is arranged on the at least two oil return branches and is used for detecting the flow of the at least two oil return branches.

In the technical scheme, the detection device of the central rotary joint comprises a motor, a variable pump, a first reversing valve, a pressure regulating module, a connecting pipe, a controller, a second reversing valve and a flow detection module. The second reversing valve is arranged on the oil return oil path, and the on-off of the oil return oil path and the on-off of any one of at least two oil return branch paths connected with the oil return oil path in parallel can be controlled through the second reversing valve.

Specifically, when the pressure in the oil return oil path reaches the rated pressure of the measured working oil path, the oil return oil path is conducted. And when the pressure in the oil return way reaches a first preset pressure, a first oil return branch in the oil return branches is conducted. And when the pressure in the oil return oil way reaches a second preset pressure, a second oil return branch in the oil return branch is conducted.

Further, the value range of the first preset pressure is larger than that of the second preset pressure.

The flow detection module is arranged on the oil return branch, so that on one hand, the pressure loss of the working oil duct under different flow rates can be conveniently tested, and on the other hand, the flow detection module can be suitable for the central swivel joint with large and small rated flow rates. In addition, the flow detection module is not arranged on the oil return oil way, so that the durability test is adapted, and the test precision and the service life of the flow detection module can be improved.

In any of the above technical solutions, the flow detection module includes: the first flow sensor is arranged on a first oil return branch of the at least two oil return branches; the second flow sensor is arranged on a second oil return branch of the at least two oil return branches; wherein the range of the rated flow rate of the first flow sensor is greater than the range of the rated flow rate of the second flow sensor.

In the technical scheme, the flow detection module comprises a first flow sensor and a second flow sensor. The two flow sensors are respectively arranged on a first oil return branch and a second oil return branch of the at least two oil return branches. The rated flow value range of the first flow sensor is larger than that of the second flow sensor, so that the central rotary joint is suitable for different rated flows.

Further, the flow detection module comprises a plurality of flow sensors, and the plurality of flow sensors are arranged on the at least two oil return branches in a one-to-one correspondence manner.

In any of the above technical solutions, the method further includes: the stop valve is arranged on the connecting pipe and used for adjusting the oil way pressure of the oil inlet oil way and the oil return oil way; the first pressure sensor is arranged on the connecting pipe and used for detecting the pressure of the two working oil passages; and the oil liquid collecting device is connected with the working oil duct and is used for collecting and detecting the oil leakage amount generated by the working oil duct.

In the technical scheme, the detection device of the central swivel joint further comprises a stop valve, a first pressure sensor and an oil collecting device. The controller is connected with the stop valve and the first pressure sensor respectively. The stop valve sets up on the connecting pipe, can control throttling arrangement and pressure regulating module through the controller, makes oil circuit pressure be the biggest operating pressure of central swivel joint, drives central swivel joint slew velocity through the control motor and for predetermineeing speed, and corotation, reversal are predetermine for long, utilize the oil leakage volume of fluid collection device detection work oil duct, realize detecting central swivel joint's sealing performance.

In particular, the first pressure sensor is a wireless pressure sensor.

In any of the above technical solutions, the method further includes: the second pressure sensor is arranged at an oil inlet of the central rotary joint and is used for detecting the oil inlet pressure; and the third pressure sensor is arranged at an oil outlet of the central rotary joint and is used for detecting the oil pressure.

In this technical solution, the detection device of the central swivel joint further includes a second pressure sensor and a third pressure sensor. The second pressure sensor is arranged at an oil inlet of the measured working oil passage of the central rotary joint to detect the oil inlet pressure. And the third pressure sensor is arranged at an oil outlet of the measured working oil channel of the central rotary joint so as to detect the oil pressure. And the controller calculates the pressure loss under the current flow according to the oil inlet pressure and the oil outlet pressure. Furthermore, the pressure loss of the current oil passage under different flow rates can be tested by changing the displacement of the variable displacement pump. Therefore, the detection performance of the detection device can be effectively improved, and the detection efficiency is improved.

In any of the above technical solutions, the method further includes: and the temperature sensor is arranged on the oil return branch and used for detecting the temperature of the pressure oil of the oil return branch.

In this technical solution, the detection device of the central swivel joint further comprises a temperature sensor. The temperature sensor is arranged on the oil return branch, the oil temperature of the oil return branch can be monitored through the temperature sensor, the controller can conveniently adjust the rotary operation of the central rotary joint and the oil circuit pressure of the whole detection device, and therefore the safety performance of the detection device is guaranteed.

In any of the above technical solutions, the method further includes: the cooling module is arranged on the oil return branch, and the cooling device is used for controlling the temperature of pressure oil of the oil return branch; and the heating module is arranged on the oil return branch and is used for controlling the temperature of pressure oil of the oil return branch.

In the technical scheme, the detection device of the central rotary joint further comprises a refrigerant module and a heating module, and the controller can control the cooling module or the heating module according to the oil temperature of the oil return branch so as to cool or heat the oil return, so that the oil temperature of the oil return is ensured to be within a safe range, and the safety of the detection device is further improved.

In any of the above technical solutions, the method further includes: and the torque sensor is connected with the central rotary joint and is used for detecting the torsional moment of the central rotary joint.

In this solution, the detection device of the central swivel joint further comprises a torque sensor. The motor drives the torque sensor through the coupler, and then is connected with a rotary component of the central rotary joint, so that the central rotary joint is accurately controlled and quickly responded, and the starting resistance moment and the rotary resistance moment can be detected.

A second aspect of the invention provides a vehicle comprising: a central swivel joint detection apparatus according to any of the preceding claims.

The vehicle provided by the invention comprises the detection device of the central rotary joint according to any one of the technical schemes. Therefore, the overall benefits of the detection device with the above-mentioned central swivel joint and/or the above-mentioned central swivel joint are not discussed here.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a central swivel joint detection apparatus according to one embodiment of the present invention;

fig. 2 is a schematic block diagram of a detection device of a central swivel joint according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

102 central swivel joint, 104 motor, 106 variable displacement pump, 108 first directional valve, 110 controller, 112 first connecting pipe, 114 second connecting pipe, 116 first pressure regulating valve, 118 second pressure regulating valve, 120 second directional valve, 122 first flow sensor, 124 second flow sensor, 126 stop valve, 128 first pressure sensor, 130 oil collecting device, 132 second pressure sensor, 134 third pressure sensor, 136 temperature sensor, 138 cooling module, 140 heating module, 142 torque sensor, 1 central swivel joint detection device.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

A detection device of a central swivel joint and a vehicle according to some embodiments of the present invention will be described with reference to fig. 1 and 2.

Example one

The present embodiment proposes a detection device 1 for a central swivel joint, as shown in fig. 1, the central swivel joint 102 includes at least two working oil channels, and the detection device 1 for a central swivel joint includes: the motor 104 is connected with the central rotary joint 102, and the motor 104 is used for driving the central rotary joint 102 to rotate; the outlet of the variable pump 106 is connected with the oil inlet of the central rotary joint 102, and the variable pump 106 is used for outputting pressure oil to the central rotary joint 102; the first reversing valve 108 is arranged on the outlet side of the variable pump 106, and the first reversing valve 108 is used for controlling the oil inlet and the oil outlet of the central rotary joint 102 to be switched; the pressure regulating module is arranged on an oil inlet oil way and an oil return oil way of the central rotary joint 102 and is used for regulating the oil way pressure of the oil inlet oil way and the oil return oil way; the connecting pipe is arranged between two working oil passages with the aperture difference smaller than a preset threshold value in the at least two working oil passages so as to communicate the two working oil passages; and the controller 110 is respectively connected with the motor 104, the variable pump 106, the first reversing valve 108 and the pressure regulating module so as to control the motor 104, the variable pump 106, the first reversing valve 108 and the pressure regulating module.

The detection apparatus 1 of the central swivel joint provided by this embodiment includes a motor 104, a variable pump 106, a first direction valve 108, a pressure regulating module, a connection pipe, and a controller 110. The controller 110 is connected to the motor 104, the variable pump 106, the first direction valve 108, and the pressure regulating module, respectively, to control the motor 104, the variable pump 106, the first direction valve 108, and the pressure regulating module. The controller 110 can control the motor 104 to rotate forward and backward, rotate at the same speed, and rotate for a long time, so that the central swivel joint 102 can be controlled to swivel, the control is accurate, the response is rapid, and on the basis, the performance test and the durability test of the central swivel joint 102 can be conveniently performed by the detection device. The variable displacement pump 106 supplies pressure oil with variable flow to the first reversing valve 108, the pressure oil flows through the first reversing valve 108 to an oil inlet of a working oil passage of the central swivel joint 102 to be detected, and the controller 110 can control the debugging motor 104 to drive the central swivel joint 102 to reach the required rotating speed and turn according to the detection requirement. At this time, the pressure oil enters the working oil passage of the central swivel joint 102, and enters the other working oil passage through the connecting pipe. Then, the oil returns through the first direction changing valve 108. The pressure regulating modules are arranged on the oil inlet oil way and the oil return oil way, and the oil way pressure of the oil inlet oil way and/or the oil return oil way can be regulated through the pressure regulating modules, so that the pressure loss of the working oil way under different flow rates can be conveniently tested, and the load pressure can be ensured not to be influenced by flow rate change basically.

In addition, the connecting pipe is arranged between the oil passages with the similar apertures of the central rotary joint 102, so that the problem of winding of the connecting pipe during continuous rotation can be avoided, and the reliability of the whole detection device can be improved.

In addition, the first reversing valve 108 is arranged at the oil inlet of the central rotary joint 102, so that an impact resistance test of the central rotary joint 102 is conveniently carried out.

Example two

In the above embodiment, as shown in fig. 1, the voltage regulating module includes: a first pressure regulating valve 116 provided in the oil return path of the center swivel joint 102, the first pressure regulating valve 116 being configured to regulate an oil path pressure of the oil return path; and a second pressure regulating valve 118, which is located on the outlet side of the variable displacement pump 106 and is disposed on an oil path between the oil inlet path and the oil return path, wherein the second pressure regulating valve 118 is used for regulating the pressure of the oil path of the oil inlet path and the oil return path.

In this embodiment, the pressure regulating module includes a first pressure regulating valve 116 and a second pressure regulating valve 118. A first pressure-regulating valve 116 is provided on the oil return passage of the center swivel joint 102 to regulate the oil passage pressure of the oil return passage. The second pressure-adjusting valve 118 is provided on the outlet side of the variable displacement pump 106 on the oil path between the oil-in oil path and the oil-return oil path to adjust the oil path pressures of the oil-in oil path and the oil-return oil path. By varying the load pressure in the working gallery of the central swivel joint 102 by adjusting the first and second

pressure regulating valves

116, 118, it is ensured that the load pressure is substantially unaffected by flow variations.

Specifically, the first pressure regulating valve 116 and the second pressure regulating valve 118 are both electromagnetic proportional relief valves.

EXAMPLE III

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: the second reversing valve 120 is arranged on the oil return path, and the second reversing valve 120 is used for controlling the on-off of the oil return path and at least two oil return branches which are connected with the oil return path in parallel; and the flow detection module is arranged on the at least two oil return branches and is used for detecting the flow of the at least two oil return branches.

In this embodiment, the detection device 1 of the central swivel joint includes a motor 104, a variable pump 106, a first direction valve 108, a pressure regulating module, a connection pipe and a controller 110, and further includes a second direction valve 120 and a flow rate detection module. The second reversing valve 120 is disposed on the oil return path, and the second reversing valve 120 can control the on/off of the oil return path and any one of the at least two oil return paths connected in parallel with the oil return path.

Specifically, the directional valve is an electromagnetic directional valve.

By arranging the flow detection module on the oil return branch, on one hand, the pressure loss of the working oil passage under different flow rates can be conveniently tested, and on the other hand, the flow detection module can be suitable for the central swivel joint 102 with large and small rated flow rates. In addition, the flow detection module is not arranged on the oil return oil way, so that the durability test is adapted, and the test precision and the service life of the flow detection module can be improved.

Example four

In any of the above embodiments, as shown in fig. 1, the flow detection module includes: a first flow sensor 122 disposed on a first oil return branch of the at least two oil return branches; a second flow sensor 124 disposed on a second oil return branch of the at least two oil return branches; the range of the rated flow rate of the first flow sensor 122 is greater than the range of the rated flow rate of the second flow sensor 124.

In this embodiment, the flow detection module includes a first flow sensor 122 and a second flow sensor 124. The two flow sensors are respectively arranged on a first oil return branch and a second oil return branch of the at least two oil return branches. The rated flow range of the first flow sensor 122 is greater than the rated flow range of the second flow sensor 124, so as to adapt to the central swivel joint 102 with different rated flows.

EXAMPLE five

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: a shutoff valve 126 provided on the second connection pipe 114, the shutoff valve 126 being used to adjust oil line pressures of the oil-in oil line and the oil-return oil line; a first pressure sensor 128 provided on the second connection pipe 114, the pressure sensor being for detecting pressures of the two working oil passages; and the oil collecting device 130 is connected with the working oil duct, and the oil collecting device 130 is used for collecting and detecting the oil leakage generated by the working oil duct.

In this embodiment, the detection device 1 of the central swivel joint further includes a shutoff valve 126, a first pressure sensor 128, and an oil collecting device 130. The controller 110 is connected to the shutoff valve 126 and the first pressure sensor 128, respectively. The stop valve 126 is disposed on the connection pipe, and the controller 110 can control the throttling device and the pressure regulating module to make the oil line pressure be the maximum working pressure of the central swivel joint 102, and control the motor 104 to drive the swivel speed of the central swivel joint 102 to be the preset speed, and the forward rotation and the reverse rotation are preset for a long time, and the oil collecting device 130 is used to detect the oil leakage of the working oil path, so as to detect the sealing performance of the central swivel joint 102.

Specifically, as shown in fig. 1, a shut-off valve 126 and a first pressure sensor 128 are also provided on the first connection pipe 112.

Specifically, the first pressure sensor 128 is a wireless pressure sensor. The controller 110 is wirelessly connected to the first pressure sensor 128.

EXAMPLE six

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: a second pressure sensor 132 provided at an oil inlet of the central swivel joint 102, the second pressure sensor being configured to detect an oil inlet pressure; and a third pressure sensor 134 provided at an oil outlet of the center swivel joint 102, for detecting an oil pressure.

In this embodiment, the detection device 1 of the central swivel joint further comprises a second pressure sensor 132 and a third pressure sensor 134. A second pressure sensor 132 is provided at an oil inlet of the measured working oil passage of the central swivel joint 102 to detect an oil inlet pressure. A third pressure sensor 134 is provided at an oil outlet of the measured working oil passage of the central swivel joint 102 to detect the oil pressure. The controller 110 calculates the pressure loss at the current flow rate based on the oil inlet pressure and the oil outlet pressure. Further, by changing the displacement of the variable displacement pump 106, the pressure loss of the current oil passage at different flow rates can be tested. Therefore, the detection performance of the detection device can be effectively improved, and the detection efficiency is improved.

Specifically, as shown in fig. 1, the central swivel joint 102 may include four working oil passages, which are independent of each other.

Specifically, as shown in fig. 1, the connection pipe includes a first connection pipe 112 and a second connection pipe 114, wherein the first connection pipe 112 is used for connecting two working oil passages with similar apertures among the four working oil passages, and the second connection pipe 114 is used for connecting the other two working oil passages with similar apertures among the four working oil passages. By connecting the two ends of the connecting pipe to the two working oil ducts with similar apertures, it can be ensured that the pressure difference between the oil inlet and the oil outlet is not too large when performing a pressure loss test, so that the values read by the second pressure sensor 132 of the oil inlet and the third pressure sensor 134 of the oil outlet can accurately reflect the pressure loss of the current oil duct, and the accuracy of the detection device 1 of the central swivel joint for the pressure loss of the central swivel joint 102 is ensured.

EXAMPLE seven

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: and the temperature sensor 136 is arranged on the oil return branch, and the temperature sensor 136 is used for detecting the temperature of the pressure oil of the oil return branch.

In this embodiment, the detection device 1 of the central swivel joint further comprises a temperature sensor 136. The temperature sensor 136 is disposed on the oil return branch, and the oil temperature of the oil return branch can be monitored by the temperature sensor 136, so that the controller 110 can adjust the rotation operation of the central rotary joint 102 and the oil pressure of the whole detection device, thereby ensuring the safety performance of the detection device.

Example eight

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: the cooling module 138 is arranged on the oil return branch, and the cooling device is used for controlling the temperature of the pressure oil of the oil return branch; and the heating module 140 is arranged on the oil return branch and is used for controlling the temperature of the pressure oil of the oil return branch.

In this embodiment, the detection device 1 of the central swivel joint further includes a cooling medium module and a heating module 140, and the controller 110 may control the cooling module 138 or the heating module 140 according to the oil temperature of the oil return branch to cool or heat the oil return, so as to ensure that the oil temperature of the oil return is within a safe range, and further improve the safety of the detection device.

Example nine

In any of the above embodiments, as shown in fig. 1, the detection device 1 of the central swivel joint further includes: the torque sensor 142 is connected to the central swivel joint 102, and the torque sensor 142 detects a torsional moment of the central swivel joint 102.

In this embodiment, the detection device 1 of the central swivel joint further comprises a torque sensor 142. The motor 104 drives the torque sensor 142 through the coupler, and is further connected with the rotating part of the central rotating joint 102, so that the central rotating joint 102 is accurately controlled and quickly responded, and the starting resistance moment and the rotating resistance moment can be detected.

Specifically, the torque sensor 142 is a low speed low torque rotational speed sensor.

The working principle of the detection device 1 of the central swivel joint will be explained with reference to fig. 1.

And (3) performance detection: when the performance of the central rotary joint is tested, the variable pump 106 outputs pressure oil to the inlet of the working oil passage of the tested central rotary joint through the first reversing valve 108 and the first reversing valve 108, the controller 110 controls the motor 104 to drive the central rotary joint 102 to reach the required rotating speed and steering direction according to the test requirement, the pressure oil enters the working oil passage of the central rotary joint 102, enters another working oil passage through the stop valve 126 and the first pressure sensor 128, returns oil through the first reversing valve 108 of the first reversing valve 108, and returns the oil to the oil tank through the first pressure regulating valve 116, the first pressure regulating valve 116 of the first pressure regulating valve 118, the second reversing valve 120 of the second pressure regulating valve 120, the flow sensor matched with the flow, the cooling module 138 and the heating module 140.

Specifically, the method comprises the following steps:

starting resistance torque: by adjusting the first and second

pressure regulating valves

116, 118 such that the first pressure regulating valve 116 is idle, the starting resistance torque of the center rotary joint 102 can be measured by the torque sensor 142.

Rated flow rate: the inlet pressure of the working oil passage of the central rotary joint is controlled to be rated pressure by a first pressure regulating valve 116 and a second pressure regulating valve 118, the rotary speed of the central rotary joint is controlled to be 15r/min by a controller 110, the central rotary joint rotates forwards and backwards for 2.5min respectively, and the flow is recorded after the oil flow is stable.

Maximum working pressure: the inlet pressure of the working oil passage of the central rotary joint is controlled to be the maximum working pressure by the first pressure regulating valve 116 and the second pressure regulating valve 118, the rotary speed of the central rotary joint is controlled to be 15r/min by the controller 110, the central rotary joint rotates forwards and backwards for 2.5min respectively, and the numerical value of each pressure sensor is recorded.

Turning resistance moment: the inlet pressure of the working oil passage of the central rotary joint is controlled to be the maximum working pressure by the first pressure regulating valve 116 and the second pressure regulating valve 118, the rotary speed of the central rotary joint is controlled to be 15r/min by the controller, the central rotary joint rotates forwards and backwards for 2.5min respectively, and the average moment of the low-speed small-torque rotating speed sensor during rotation is recorded.

Pressure loss test: controlling the inlet pressure of the working oil channel of the central rotary joint to be the maximum working pressure through a first pressure regulating valve 116 and a second pressure regulating valve 118, controlling the rotary speed of the central rotary joint to be 15r/min and rotating forward and backward for 2.5min respectively through a controller, and calculating the pressure loss under the flow according to the data of pressure sensors at the inlet and the outlet of the working oil channel; the pressure loss of the current oil duct at different flow rates can be tested by changing the displacement of the variable displacement pump 106 and repeating the steps.

Sealing performance: the check valve 126 is closed, the second pressure regulating valve 118 is adjusted to set the oil passage pressure to the maximum working pressure of the center rotary joint, the rotation speed of the center rotary joint is controlled to 15r/min by the controller 110, the rotation speed is controlled to 2.5min each, and the leakage amount of the working oil passage is checked by the oil collecting device 130.

In addition, the detection device 1 for the central swivel joint can also perform an impact resistance test of the central swivel joint, and the general method comprises the following steps: the inlet pressure of the working oil passage of the central rotary joint is controlled to be rated pressure by a first pressure regulating valve 116 and a second pressure regulating valve 118, the rotary speed of the central rotary joint is controlled to be 15r/min by a controller, the central rotary joint rotates forwards and backwards for 2.5min respectively, the oil inlet and the oil outlet of the central rotary joint are controlled to change alternately by a first reversing valve 108, and the leakage rate of the working oil passage is checked.

And (3) testing the endurance life: when the durability of the central rotary joint is tested, the variable pump 106 outputs pressure oil to the inlet of the working oil channel of the tested central rotary joint through the first reversing valve 108, the controller controls the debugging motor to drive the central rotary joint to reach a specified rotating speed and turn according to test requirements, the pressure oil enters the working oil channel of the central rotary joint at the moment, enters another working oil channel through the stop valve 126 and the first pressure sensor 128, returns oil through the first reversing valve 108, and returns the oil through the first pressure regulating valve 116, the second pressure regulating valve 118, the first pressure regulating valve 116 (controlling the inlet pressure of the working oil channel of the central rotary joint to be a rated pressure), the second reversing valve 120, a pipeline without a flow sensor, the cooling module 138 and the heating module 140 to the oil tank. The controller 110 controls the motor to rotate forwards and backwards according to the running time requirement, and records the endurance test once per cycle until the test times reach the endurance test requirement.

Specifically, the first directional valve 108 is a high-frequency-response three-position four-way electromagnetic directional valve, the second directional valve 120 is an electromagnetic directional valve, the oil collecting device 130 is a measuring cup, the cooling module 138 includes a cooler, and the heating module 140 includes a heater.

In addition, the electromagnetic valves, the proportional valves and the motors are all provided with corresponding control signals by the controller 110 according to test requirements, and data such as flow, pressure, temperature, rotating speed, torque, test times and the like are acquired, displayed and stored. In fig. 1, the first pressure and the second pressure are respectively an inlet pressure and an outlet pressure, the third pressure and the fourth pressure are respectively pressures detected by the second connecting pipe 114 and the first connecting pipe 112, the fifth pressure is a torsional moment, the sixth pressure and the seventh pressure are respectively flow detected by the first flow sensor and the second flow sensor, and the seventh pressure is an oil temperature of the oil return path.

Example ten

The embodiment provides a vehicle including: the detecting device 1 for a central swivel joint according to any one of the above embodiments.

The vehicle proposed in the present embodiment includes the detection device 1 of the central swivel joint according to any one of the above embodiments. Therefore, all the advantages of the detecting device 1 with the above-mentioned central swivel joint and/or the above-mentioned central swivel joint 102 are not discussed one by one here.

Specifically, the vehicle can include excavator, hoist, rotary drilling rig and fire engine etc. through set up central rotary joint's detection device 1 on the vehicle, can test at any time according to the central rotary joint who is equipped with on the operation demand on the vehicle, need not specific place, guarantees central rotary joint's performance, avoids the vehicle to break down.

In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection apparatus of a central swivel joint, characterized in that the central swivel joint comprises at least two working oil ducts, the detection apparatus of the central swivel joint comprising:

the motor is connected with the central rotary joint and is used for driving the central rotary joint to rotate;

the outlet of the variable pump is connected with the oil inlet of the central rotary joint, and the variable pump is used for outputting pressure oil to the central rotary joint;

the first reversing valve is arranged on the oil inlet side of the central rotary joint and is used for controlling the oil inlet and the oil outlet of the central rotary joint to be switched;

the pressure regulating module is arranged on an oil inlet oil way and an oil return oil way of the central rotary joint and is used for regulating the oil way pressure of the oil inlet oil way and the oil return oil way;

the connecting pipe is arranged between two working oil passages with the aperture difference smaller than a preset threshold value in the at least two working oil passages so as to communicate the two working oil passages;

and the controller is respectively connected with the motor, the variable pump, the first reversing valve and the pressure regulating module so as to control the motor, the variable pump, the first reversing valve and the pressure regulating module.

2. The central swivel joint detection device of claim 1, wherein the pressure regulating module comprises:

the first pressure regulating valve is arranged on an oil return oil way of the central rotary joint and is used for regulating the oil way pressure of the oil return oil way;

and the second pressure regulating valve is positioned on the outlet side of the variable displacement pump and arranged on an oil path between the oil inlet oil path and the oil return oil path, and is used for regulating the oil path pressure of the oil inlet oil path and the oil return oil path.

3. The detecting device of a central swivel joint according to claim 1 or 2, further comprising:

the second reversing valve is arranged on the oil return path and used for controlling the on-off of the oil return path and at least two oil return branches connected with the oil return path in parallel;

and the flow detection module is arranged on the at least two oil return branches and used for detecting the flow of the at least two oil return branches.

4. The central swivel joint sensing device of claim 3, wherein the flow sensing module comprises:

the first flow sensor is arranged on a first oil return branch of the at least two oil return branches;

the second flow sensor is arranged on a second oil return branch of the at least two oil return branches;

wherein a range of a rated flow rate of the first flow sensor is larger than a range of a rated flow rate of the second flow sensor.

5. The central swivel joint sensing device of claim 3, further comprising:

the stop valve is arranged on the connecting pipe and used for adjusting the oil path pressure of the oil inlet oil path and the oil return oil path;

the first pressure sensor is arranged on the connecting pipe and used for detecting the pressure of the two working oil passages;

the oil collecting device is connected with the working oil duct and used for collecting and detecting oil leakage generated by the working oil duct.

6. The central swivel joint sensing device of claim 5, further comprising:

the second pressure sensor is arranged at an oil inlet of the central rotary joint and is used for detecting the pressure of oil inlet;

and the third pressure sensor is arranged at an oil outlet of the central rotary joint and is used for detecting the oil pressure.

7. A central swivel joint detection apparatus according to claim 5 or 6, further comprising:

and the temperature sensor is arranged on the oil return branch and used for detecting the pressure oil temperature of the oil return branch.

8. The central swivel joint sensing device of claim 7, further comprising:

the cooling module is arranged on the oil return branch, and the cooling device is used for controlling the temperature of the pressure oil of the oil return branch;

and the heating module is arranged on the oil return branch and is used for controlling the temperature of pressure oil of the oil return branch.

9. The central swivel joint sensing device of claim 1, further comprising:

and the torque sensor is connected with the central rotary joint and is used for detecting the torsional moment of the central rotary joint.

10. A vehicle, characterized by comprising:

a central swivel joint sensing device as claimed in any one of claims 1 to 9.