CN119084394A - A hydraulic control system for a heavy-duty hydraulic flatbed truck - Google Patents
A hydraulic control system for a heavy-duty hydraulic flatbed truck Download PDFInfo
- Publication number
- CN119084394A CN119084394A CN202411416850.XA CN202411416850A CN119084394A CN 119084394 A CN119084394 A CN 119084394A CN 202411416850 A CN202411416850 A CN 202411416850A CN 119084394 A CN119084394 A CN 119084394A
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- Prior art keywords
- hydraulic
- heavy
- main controller
- duty
- control system
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- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 40
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
The invention provides a hydraulic control system of a heavy-duty hydraulic flat car, which comprises a main controller, a hydraulic pump, a transfer case, a direct-current servo motor and a motor driver, wherein the main controller is used for carrying out control logic operation and sending control instructions to the motor driver, the motor driver is used for receiving the control instructions sent by the main controller and controlling the direct-current servo motor to operate according to rotating speeds set by the control instructions, the two direct-current servo motors are respectively in transmission connection with two input shafts of the transfer case, an output shaft of the transfer case is in transmission connection with the hydraulic pump, and the hydraulic pump is used for providing power for the hydraulic system of the whole car.
Description
Technical Field
The invention belongs to the technical field of hydraulic flat cars, and particularly relates to a hydraulic control system of a heavy-duty hydraulic flat car.
Background
The heavy-duty hydraulic flat car in the current market generally uses a diesel engine as a power unit, and the diesel engine drives a hydraulic pump through a belt to control the rotating speed of the diesel engine and the direction and opening of the hydraulic pump so as to realize the power output of the vehicle, as disclosed in the Chinese patent application document with the application publication number of CN 118358611A. The diesel engine in the power unit has higher self cost and later use cost, and has larger noise, and the stability and the accuracy are not ideal. The space required for installing the diesel engine is large, and the layout of the vehicle body is affected. Or an alternating current servo motor is adopted as a power unit, so that the alternating current servo power supply has limitation and is mostly used on rail flat cars.
With the increasing popularization of heavy-duty hydraulic flat cars, the driving of the hydraulic pump by the direct-current servo motor is also a future trend, and the accurate driving of the hydraulic pump by the high-power direct-current servo motor is a focus technology of industrial attention. At present, the technology of a direct current servo motor and a hydraulic pump appears in the market, but when a single servo motor is applied to the phenomenon that the electric power is insufficient, the stable operation of a heavy-load hydraulic flat car is difficult to ensure.
Therefore, the hydraulic control system of the heavy-duty hydraulic flat car needs to be designed to solve the technical problems faced at present by increasing the number of servo motors, improving the input power of the hydraulic pump and ensuring the stable operation of the heavy-duty hydraulic flat car.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the hydraulic control system for the heavy-duty hydraulic flat car, which can improve the input power of the hydraulic pump by increasing the number of the servo motors and ensure the stable operation of the heavy-duty hydraulic flat car.
The technical scheme is that the hydraulic control system of the heavy-duty hydraulic flat car comprises a main controller, a hydraulic pump, a transfer case, a direct-current servo motor and a motor driver, wherein the main controller is used for carrying out control logic operation and sending control instructions to the motor driver, the motor driver is used for receiving the control instructions sent by the main controller and controlling the direct-current servo motor to run according to rotating speeds set by the control instructions, the two direct-current servo motors are respectively in transmission connection with two input shafts of the transfer case, an output shaft of the transfer case is in transmission connection with the hydraulic pump, and the hydraulic pump is used for providing power for the hydraulic system of the whole car.
The oil inlet and the oil outlet of the hydraulic pump are respectively provided with an oil inlet pressure sensor and an oil outlet pressure sensor, the oil inlet pressure sensor and the oil outlet pressure sensor are connected with the main controller, and the main controller detects the pressure difference between the oil inlet and the oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor and automatically adjusts the rotating speeds of the two direct current servo motors.
The main controller detects the pressure difference between an oil inlet and an oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor, and adjusts the opening size of the hydraulic pump in real time so that the hydraulic pump keeps the maximum power output.
The whole-vehicle hydraulic system is provided with a traveling wheel driving hydraulic system, the traveling wheel hydraulic system is provided with a hydraulic motor for driving traveling wheels to rotate, a speed acquisition component for acquiring the rotating speed of the hydraulic motor is arranged on the hydraulic motor, and the speed acquisition component is connected with the main controller.
The hydraulic control system of the heavy-duty hydraulic flat car further comprises an inclination sensor, wherein the inclination sensor is arranged in the middle of the body of the heavy-duty hydraulic flat car and is connected with the main controller.
The heavy-duty hydraulic flat car hydraulic control system further comprises a heat dissipation fan and a temperature sensor, wherein the temperature sensor is arranged on the hydraulic oil tank and used for detecting the temperature of hydraulic oil, the heat dissipation fan is used for reducing the temperature of the hydraulic oil of the whole car, and the temperature sensor and the heat dissipation fan are both connected with the main controller.
And the main controller respectively sends the same control instruction to the two motor drivers.
The heavy-duty hydraulic flat car hydraulic control system also comprises a battery pack, wherein the battery pack is used for supplying power to the whole heavy-duty hydraulic flat car.
The battery pack is formed by connecting 48 2V lead-acid batteries in series, and is arranged in the middle of a vehicle body of the heavy-duty hydraulic flat car.
The master controller is an EPEC 4602 controller.
The invention has the beneficial effects that:
(1) According to the invention, the hydraulic pump is connected with two direct-current servo motors through the transfer case, and the input power of the hydraulic pump is improved by increasing the number of the servo motors, so that the stable operation of the heavy-duty hydraulic flat car is ensured;
(2) According to the invention, the hydraulic pump is driven by the high-power direct-current servo motor, so that the manufacturing cost and the use cost are greatly reduced, compared with the traditional diesel engine driving, the rotating speed can be controlled more accurately, the stability of the hydraulic pump is improved, the running noise can be reduced, and the layout space of the vehicle body structure is saved.
Drawings
Fig. 1 is a schematic block diagram of a hydraulic control system of a heavy-duty hydraulic flatbed in the present invention.
Fig. 2 is a schematic diagram of the installation structure of the hydraulic pump and the dc servo motor in the present invention.
Fig. 3 is a schematic block diagram of a heat dissipating fan and a temperature sensor according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is not intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The hydraulic control system of the heavy-duty hydraulic flat car comprises a main controller 1, a hydraulic pump 7, a transfer case 6, a direct-current servo motor 3 and a motor driver 2, wherein the main controller 1 is used for carrying out control logic operation and sending control instructions to the motor driver 2, the motor driver 2 is used for receiving the control instructions sent by the main controller 1 and controlling the direct-current servo motor 3 to run according to rotating speeds set by the control instructions, the two direct-current servo motors 3 are respectively in transmission connection with two input shafts of the transfer case 6, an output shaft of the transfer case 6 is in transmission with the hydraulic pump 7, the hydraulic pump 7 is used for providing power for the hydraulic system of the whole car, in the embodiment, the hydraulic pump 7 is connected with the two direct-current servo motors 3 through the transfer case 6, the input power of the hydraulic pump is improved through increasing the number of the servo motors, the stable running of the heavy-duty hydraulic flat car is ensured, the hydraulic pump 7 is driven by adopting the high-power direct-current servo motor 3, the manufacturing cost and the using cost are greatly reduced, compared with the traditional diesel engine driving, the rotating speeds can be controlled more accurately, the stability is improved, meanwhile, the running noise can be reduced, and the structural layout space of the car body can be saved.
In some embodiments, an oil inlet 701 and an oil outlet 702 of a hydraulic pump 7 are respectively provided with an oil inlet pressure sensor 5 and an oil outlet pressure sensor 4, the oil inlet pressure sensor 5 and the oil outlet pressure sensor 4 are connected with a main controller 1, the main controller 1 detects the pressure difference between the oil inlet 701 and the oil outlet 702 of the hydraulic pump 7 through the oil inlet pressure sensor 5 and the oil outlet pressure sensor 4 and automatically adjusts the rotating speeds of two direct current servo motors 3, specifically, two motor drivers 2 are arranged in a hydraulic flat car driver box, a 96V direct current power supply is supplied, output U, V, W and three-phase power are used for driving the direct current servo motors 3, and motor rotating speeds and position data are acquired from an encoder in real time.
In some embodiments, the main controller 1 detects the pressure difference between the oil inlet 701 and the oil outlet 702 of the hydraulic pump 7 through the oil inlet pressure sensor 5 and the oil outlet pressure sensor 4, and adjusts the opening size of the hydraulic pump 7 in real time, so that the hydraulic pump 7 maintains the maximum power output, the working efficiency of the heavy-duty hydraulic flat car is improved, the vehicle can always maintain the optimal working state, and particularly, the opening size of the hydraulic pump can be controlled through a proportional valve, and the main controller 1 controls the opening degree of the hydraulic pump by outputting a control signal to the proportional valve.
In some embodiments, the whole-vehicle hydraulic system is provided with a walking wheel driving hydraulic system, the walking wheel hydraulic system is provided with a hydraulic motor for driving walking wheels to rotate, the hydraulic motor is provided with a speed acquisition component 8 for acquiring the rotating speed of the hydraulic motor, the speed acquisition component 8 is connected with the main controller 1, the rotating speed of the walking wheels is acquired through the speed acquisition component 8, the running state of each walking wheel is judged according to the speed fed back by each walking wheel acquisition, if the situation of slipping and idling occurs, the main controller 1 performs corresponding processing, the opening of the proportional valve of the corresponding hydraulic motor is regulated through controlling the proportional valve of the corresponding hydraulic motor and through different current control signals for the proportional valve, so that the hydraulic power is reasonably and effectively distributed, and the speed acquisition component 8 is a rotating speed sensor.
In some embodiments, the hydraulic control system of the heavy-duty hydraulic flat car further comprises an inclination sensor 9, wherein the inclination sensor 9 is arranged in the middle of the car body of the heavy-duty hydraulic flat car, the inclination sensor 9 is connected with the main controller 1, the inclination sensor 9 can detect the inclination angle of the car body, the heavy-duty hydraulic flat car is judged to run on an ascending slope, a descending slope or a flat ground through the inclination angle of the car body, and the opening size of the hydraulic motor is adjusted in real time to adaptively adjust the speed and the torque of the travelling wheels.
In some embodiments, as shown in fig. 3, the heavy-duty hydraulic flat car hydraulic control system further comprises a heat dissipation fan 11 and a temperature sensor 10, wherein the temperature sensor 10 is arranged on a hydraulic oil tank and used for detecting the temperature of hydraulic oil, the heat dissipation fan 11 is used for reducing the temperature of the hydraulic oil of the whole car, the temperature sensor 10 and the heat dissipation fan 11 are both connected with the main controller 1, and specifically, the heat dissipation fan 11 is arranged at a position close to a hydraulic pump and dissipates the temperature of the hydraulic oil through the heat dissipation fan 11, so that safe operation assurance is provided for the hydraulic system of the whole car, and the temperature sensor 10 collects the temperature of the hydraulic oil to control the start and stop of the heat dissipation fan 11.
In some embodiments, the main controller 1 sends the same control command to the two motor drivers 2 respectively, so as to control the two direct current servo motors 3 to always keep synchronous rotation, and specifically, the direct current servo motors 3 are 20kw direct current servo motors.
In some embodiments, the hydraulic control system of the heavy-duty hydraulic flat car further comprises a battery pack, wherein the battery pack is used for supplying power to the whole heavy-duty hydraulic flat car, the battery pack is formed by connecting 48 2V lead-acid batteries in series, the battery pack is arranged in the middle of the car body of the heavy-duty hydraulic flat car, 96V direct current is output by the battery pack, and the capacity of the battery pack is 1000AH.
In some embodiments, the main controller 1 is an EPEC 4602 controller, and is configured to receive signals of all sensors of the whole vehicle and state parameters of the direct current servo motor, perform operation of whole vehicle motion logic according to the signals of the sensors and the state parameters of the direct current servo motor, send parameter instructions to the direct current servo motor, and accurately control a proportional valve for controlling the direction and the opening of the hydraulic pump.
Thus, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concepts of the invention, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The above examples only represent some embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A hydraulic control system for a heavy duty hydraulic flatbed, comprising:
The system comprises a main controller, a hydraulic pump, a transfer case, a direct current servo motor and a motor driver;
the main controller is used for performing control logic operation and sending a control instruction to the motor driver;
The motor driver is used for receiving the control command sent by the main controller and controlling the running of the direct current servo motor according to the rotating speed set by the control command;
The two direct current servo motors are respectively connected with two input shafts of the transfer case in a transmission way, an output shaft of the transfer case is in transmission with the hydraulic pump, and the hydraulic pump is used for providing power for the whole vehicle hydraulic system.
2. The hydraulic control system of the heavy-duty hydraulic flatbed of claim 1, wherein the oil inlet and the oil outlet of the hydraulic pump are respectively provided with an oil inlet pressure sensor and an oil outlet pressure sensor;
The main controller detects the pressure difference between an oil inlet and an oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor, and automatically adjusts the rotating speeds of the two direct current servo motors.
3. The hydraulic control system of the heavy-duty hydraulic flatbed of claim 2, wherein the main controller detects the pressure difference between an oil inlet and an oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor, and adjusts the opening size of the hydraulic pump in real time so as to keep the maximum power output of the hydraulic pump.
4. The hydraulic control system of the heavy-duty hydraulic flatbed of claim 1, wherein the whole car hydraulic system is provided with a walking wheel driving hydraulic system, the walking wheel hydraulic system is provided with a hydraulic motor for driving walking wheels to rotate, a speed collecting part for collecting the rotating speed of the hydraulic motor is arranged on the hydraulic motor, and the speed collecting part is connected with the main controller.
5. The hydraulic control system of the heavy-duty hydraulic flatbed of claim 1, further comprising an inclination sensor, wherein the inclination sensor is arranged in the middle of the body of the heavy-duty hydraulic flatbed, and the inclination sensor is connected with the main controller.
6. The heavy-duty hydraulic flat car hydraulic control system according to claim 1, further comprising a heat dissipation fan and a temperature sensor, wherein the temperature sensor is arranged on a hydraulic oil tank and used for detecting the temperature of hydraulic oil, the heat dissipation fan is used for reducing the temperature of the hydraulic oil of the whole car, and the temperature sensor and the heat dissipation fan are connected with the main controller.
7. The hydraulic control system of a heavy duty hydraulic flatbed of claim 1, wherein the main controller sends the same control command to both of the motor drivers.
8. The heavy duty hydraulic flatbed hydraulic control system of claim 1, further comprising a battery pack for supplying power to the entire heavy duty hydraulic flatbed.
9. The hydraulic control system of the heavy-duty hydraulic flat car according to claim 8, wherein the battery pack is formed by connecting 48 2V lead-acid batteries in series, and the battery pack is arranged in the middle of the body of the heavy-duty hydraulic flat car.
10. The hydraulic control system of a heavy duty hydraulic flatbed of claim 1, wherein the main controller is an EPEC 4602 controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411416850.XA CN119084394A (en) | 2024-10-11 | 2024-10-11 | A hydraulic control system for a heavy-duty hydraulic flatbed truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411416850.XA CN119084394A (en) | 2024-10-11 | 2024-10-11 | A hydraulic control system for a heavy-duty hydraulic flatbed truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119084394A true CN119084394A (en) | 2024-12-06 |
Family
ID=93697513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411416850.XA Pending CN119084394A (en) | 2024-10-11 | 2024-10-11 | A hydraulic control system for a heavy-duty hydraulic flatbed truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119084394A (en) |
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2024
- 2024-10-11 CN CN202411416850.XA patent/CN119084394A/en active Pending
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