Hydraulic control system, travel drive device, and vehicle

Abstract

The application relates to the technical field of vehicles, in particular to a hydraulic control system, a driving device and a vehicle. The hydraulic control system comprises a hydraulic actuator, a hydraulic pump, a first oil supply oil path, a driving control valve group, a brake, and a second oil supply oil path. The hydraulic pump is provided with an input pipe and an output pipe, and the input pipe is connected with a hydraulic oil source. One end of the first oil supply oil path is connected with the hydraulic actuator, and the other end is connected with the output pipe of the hydraulic pump. The driving control valve group is arranged on the first oil supply oil path and located between the output pipe of the hydraulic pump and the hydraulic actuator, and is used for controlling the action of the hydraulic actuator. One end of the second oil supply oil path is connected with the brake, and the other end is connected with the output pipe of the hydraulic pump. The brake control valve group is arranged on the second oil supply oil path and located between the brake and the output pipe of the hydraulic pump, and is used for controlling the brake to release the brake action or form the brake action. The hydraulic control system has a simpler structure, can effectively reduce the cost, and can avoid the additional energy consumption caused by the operation of a single pump body.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a hydraulic control system, a driving device, and a vehicle. Background Technology

[0002] The coal mining machine is used in conjunction with scraper conveyors and hydraulic supports for underground coal mining. When the coal mining machine is working, it moves along the working face at a certain speed, and when it is not working, it needs to stop in a certain position.

[0003] Currently, coal mining machines use hydraulic brakes for braking. This requires the hydraulic control circuit to be stable and reliable. When the coal mining machine needs to move, the hydraulic system quickly provides pressurized oil to the brake, causing the clutch plates to disengage and the coal mining machine to move. When it needs to stop, the hydraulic system needs to quickly release the high-pressure oil in the brake, causing the clutch plates to quickly engage and enter the braking state, bringing the coal mining machine to a standstill.

[0004] In related technologies, the brake is mainly controlled by a separately installed drive pump, which results in high energy consumption of the entire hydraulic system and a significant increase in manufacturing and maintenance costs. Utility Model Content

[0005] In view of this, this application aims to provide a hydraulic control system, a driving device, and a vehicle to save energy and reduce costs.

[0006] According to a first aspect of this application, a hydraulic control system is provided, comprising: a hydraulic actuator; a hydraulic pump having an input pipe and an output pipe, the input pipe being connected to a hydraulic oil source; a first oil supply circuit, one end of which is connected to the hydraulic actuator, and the other end of which is connected to the output pipe of the hydraulic pump; a drive control valve assembly disposed in the first oil supply circuit and located between the output pipe of the hydraulic pump and the hydraulic actuator, for controlling the action of the hydraulic actuator; a brake; a second oil supply circuit, one end of which is connected to the brake and the other end of which is connected to the output pipe of the hydraulic pump; and a brake control valve assembly disposed in the second oil supply circuit and located between the brake and the output pipe of the hydraulic pump, for controlling the brake to release braking action or to initiate braking action.

[0007] In the above technical solution, the hydraulic control system has a simpler structure, which not only effectively reduces costs but also makes the layout more compact and occupies less space; at the same time, it can avoid the extra energy consumption caused by the operation of a separate pump body, thereby saving energy.

[0008] In some technical solutions, optionally, the brake control valve group includes: a first directional valve, which has an oil inlet and a working oil port, the oil inlet being connected to the output pipe of the hydraulic pump, and the working oil port being connected to the brake.

[0009] In the above technical solution, the state switching of the brake is achieved through the first reversing valve, which is simple to control, responds quickly, and effectively improves the stability of the hydraulic control system.

[0010] In some technical solutions, the brake control valve assembly may optionally include a pressure reducing valve, located between the oil inlet of the first directional valve and the output pipe of the hydraulic pump.

[0011] This improves the overall stability and reliability of the hydraulic control system. It also prevents overflow caused by excessive system pressure, effectively reducing system heat generation and further enhancing system reliability.

[0012] In some technical solutions, the brake control valve assembly may optionally include a check valve; the check valve is located between the pressure reducing valve and the output pipe of the hydraulic pump.

[0013] In the above technical solution, the pressure fluctuations generated by the operation of the hydraulic actuator are blocked from the reverse path by the check valve and will not affect the brake, thus preventing low-pressure alarm shutdown faults. This allows the braking system to maintain reliable and stable braking performance under complex working conditions, thereby effectively improving the safety and reliability of the hydraulic control system.

[0014] In some technical solutions, the hydraulic control system may optionally include: a first pressure detection unit, which is located in the second oil supply circuit and between the oil inlet of the pressure reducing valve and the first directional valve.

[0015] In practical applications, by monitoring the hydraulic oil pressure after it has been adjusted by the pressure reducing valve in real time through the first pressure detection unit, it can be determined whether the brake can operate normally.

[0016] In some technical solutions, the hydraulic control system may optionally include an alarm device; the alarm device is connected to the first pressure detection unit and issues an alarm signal when the pressure detected by the first pressure detection unit is lower than a first preset pressure or higher than a second preset pressure.

[0017] In the above technical solution, the alarm device will issue an alarm signal when the system pressure is too low or too high. This ensures the normal operation of the hydraulic control system.

[0018] In some technical solutions, the hydraulic control system may optionally include a second pressure detection unit, which is located in the first oil supply circuit and between the output pipe of the hydraulic pump and the drive control valve group.

[0019] In practical applications, the hydraulic oil pressure after being output from the hydraulic pump but before entering the drive control valve group is monitored in real time by the second pressure detection unit in order to evaluate the working status of the drive control valve group.

[0020] In some technical solutions, the hydraulic control system may optionally include a filter; the filter is located in the output pipe of the hydraulic pump.

[0021] In the above technical solution, the filter can filter the hydraulic oil output from the hydraulic pump and remove impurities, thereby reducing the risk of wear and damage to system components caused by impurities.

[0022] A second aspect of this application provides a driving device, comprising: a hydraulic control system as provided in any of the foregoing technical solutions; wherein the hydraulic actuator includes a height adjustment cylinder. Thus, the driving device possesses all the beneficial effects of any of the foregoing technical solutions, which will not be elaborated further here.

[0023] A third aspect of this application provides a vehicle, comprising: a hydraulic control system as provided in any of the foregoing technical solutions; or a driving device as provided in any of the foregoing technical solutions. Thus, the vehicle possesses all the beneficial effects of any of the foregoing technical solutions, which will not be elaborated further here.

[0024] Additional aspects and advantages of the technical solutions of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the hydraulic control system provided in the embodiments of this application.

[0026] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Hydraulic actuator; 200 Hydraulic pump; 210 Input pipe; 220 Output pipe; 230 Filter; 310 First oil supply circuit; 320 Drive control valve assembly; 330 Second pressure detection unit; 400 Brake; 510 Second oil supply circuit; 520 Brake control valve assembly; 521 First directional valve; 522 Oil inlet; 523 Working oil port; 524 Pressure reducing valve; 525 Check valve; 530 First pressure detection unit; 600 Alarm device; 700 Hydraulic oil source; 800 Height adjustment cylinder. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] Currently, when the coal mining machine needs to start moving, the hydraulic system must quickly and steadily supply pressurized oil to the brake, causing the clutch plates inside the brake to disengage, thus creating conditions for the coal mining machine to move smoothly on the working face as required. When the coal mining machine needs to stop, the hydraulic system must quickly and completely release the high-pressure oil from the brake. As the high-pressure oil is released, the clutch plates quickly engage, the brake enters the braking state, ultimately ensuring that the coal mining machine can remain stably stationary, guaranteeing the safety and accuracy of the operation.

[0030] In related technologies, hydraulic systems typically employ a dual-pump structure, with one pump supplying oil separately to the brake to control the braking of the coal mining machine.

[0031] However, on the one hand, the additional hydraulic pump increases the system's manufacturing cost and space occupation; on the other hand, the continuous operation of the dedicated brake pump leads to an increase in the overall energy consumption of the machine.

[0032] In view of this, in order to reduce energy consumption and costs, this application provides a hydraulic control system, including: a hydraulic actuator, a hydraulic pump, a first oil supply circuit, a drive control valve group, a brake, a second oil supply circuit, and a brake control valve group. The first and second oil supply circuits are connected in parallel to the output pipeline of the hydraulic pump. The first oil supply circuit connects the hydraulic actuator and the hydraulic pump, and the second oil supply circuit connects the brake and the hydraulic pump. Thus, by connecting the brake circuit (second oil supply circuit) and the main working circuit (first oil supply circuit) in parallel to the same hydraulic pump, the separate brake pump for the brake is eliminated, thereby simplifying the structure, reducing manufacturing and maintenance costs, and significantly reducing system energy consumption.

[0033] It is understood that the hydraulic control system provided in this application embodiment can be used in a driving device to provide it with walking power and parking brake; or it can be used as a key component of various vehicles (such as heavy engineering vehicles, mining transportation equipment, etc.).

[0034] The following is combined with Figure 1The hydraulic control system, driving drive device, and vehicle provided in this application will be described in detail through specific embodiments and application scenarios.

[0035] Reference Figure 1 In some embodiments, this application provides a hydraulic control system, the structure of which includes: a hydraulic actuator 100, a hydraulic pump 200, a first oil supply circuit 310, a drive control valve group 320, a brake 400, a second oil supply circuit 510, and a brake control valve group 520.

[0036] The hydraulic pump 200 has an input pipe 210 and an output pipe 220. The input pipe 210 is connected to the hydraulic oil source 700. One end of the first oil supply circuit 310 is connected to the hydraulic actuator 100, and the other end is connected to the output pipe 220 of the hydraulic pump 200 to supply hydraulic oil to the hydraulic actuator 100. The drive control valve assembly 320 is disposed in the first oil supply circuit 310 and located between the hydraulic actuator 100 and the output pipe 220 of the hydraulic pump 200, and is used to control the operation of the hydraulic actuator 100. One end of the second oil supply circuit 510 is connected to the brake 400, and the other end is connected to the output pipe 220 of the hydraulic pump 200 to supply hydraulic oil to the brake 400. The brake control valve assembly 520 is disposed in the second oil supply circuit 510 and located between the brake 400 and the output pipe 220 of the hydraulic pump 200, and is used to control the brake 400 to release the brake or initiate the brake action.

[0037] Specifically, the hydraulic pump 200, as the power source of the entire hydraulic control system, has an input pipe 210 and an output pipe 220. The input pipe 210 is closely connected to the hydraulic oil source 700 to ensure a continuous and stable supply of sufficient hydraulic oil to the hydraulic pump 200, ensuring the normal operation of the system.

[0038] The first oil supply circuit 310 is responsible for supplying hydraulic oil to the hydraulic actuator 100. One end of it is connected to the hydraulic actuator 100, and the other end is connected to the output pipe 220 of the hydraulic pump 200. In this way, the hydraulic oil output by the hydraulic pump 200 can flow smoothly into the first oil supply circuit 310 through the output pipe 220, and then be input into the hydraulic actuator 100.

[0039] The drive control valve group 320 can control the hydraulic actuator 100 to perform corresponding operations according to actual operating requirements.

[0040] The second oil supply circuit 510 is mainly responsible for supplying hydraulic oil to the brake 400. One end of it is connected to the brake 400, and the other end is also connected to the output pipe 220 of the hydraulic pump 200. When the hydraulic pump 200 is working, the hydraulic oil can flow into the second oil supply circuit 510 through the output pipe 220, thereby providing the required hydraulic power to the brake 400.

[0041] The brake control valve assembly 520 is located on the second oil supply circuit 510, between the brake 400 and the output pipe 220 of the hydraulic pump 200. It can control the brake 400 to release or initiate braking action according to stop or start commands. When stopping is required, the brake control valve assembly 520 activates, putting the brake 400 into a braking state; when starting is required, the brake control valve assembly 520 can control the brake 400 to release braking action promptly.

[0042] In the above embodiments, the first oil supply circuit 310 and the second oil supply circuit 510 are connected in parallel to the output pipe 220 of the hydraulic pump 200, eliminating the need for a separate pump body for the brake 400. Compared to the dual-pump structure in related technologies, the hydraulic control system provided in this application embodiment has a simpler structure, effectively reducing costs and making the layout more compact and space-saving; at the same time, it avoids the additional energy consumption caused by the operation of a separate pump body, thereby saving energy.

[0043] In some embodiments, the brake control valve assembly 520 includes a first directional valve 521. The first directional valve 521 has an inlet 522 and a working port 523; the inlet 522 is connected to the output pipe 220 of the hydraulic pump 200, and the working port 523 is connected to the brake 400.

[0044] The flow direction and on / off state of the hydraulic oil in the brake 400 are controlled by the first directional valve 521. When stopping is required, the first directional valve 521 is de-energized, blocking the continued flow of hydraulic oil from the hydraulic pump 200 into the brake 400. The hydraulic oil in the brake 400 is released through the return port of the first directional valve 521, and the brake 400 applies the brakes. When starting is required, the first directional valve 521 is energized, and hydraulic oil flows into the brake 400 through the first directional valve 521, causing the brake 400 to build up oil pressure and release the brakes.

[0045] In the above embodiment, the state switching of the brake 400 is achieved through the first directional valve 521, which is simple to control, responds quickly, and effectively improves the stability of the hydraulic control system. It can be understood that the first directional valve 521 can be a solenoid directional valve, a manual directional valve, or a hydraulic directional valve, etc. In this embodiment, a solenoid directional valve is selected as the first directional valve 521, which can be directly controlled by an electrical signal to achieve rapid switching of the oil circuit.

[0046] In some embodiments, the brake control valve assembly 520 further includes a pressure reducing valve 524. The pressure reducing valve 524 is disposed between the oil inlet 522 of the first directional valve 521 and the output pipe 220 of the hydraulic pump 200.

[0047] The pressure reducing valve 524 is used to regulate the system pressure. In practical applications, the first oil supply circuit 310 is responsible for supplying pressurized hydraulic oil to the hydraulic actuator 100, which typically requires maintaining a high pressure. Therefore, the hydraulic oil pressure output by the hydraulic pump 200 is often high and may fluctuate. If it is directly supplied to the first directional valve 521 and the subsequent brake 400 through the second oil supply circuit 510, the excessive pressure will impact the brake 400, affecting its service life and performance stability, and may even cause safety accidents. The pressure reducing valve 524 can reduce the pressure of the input high-pressure hydraulic oil, stabilizing its output pressure within the range that allows the brake 400 and the entire braking system to operate safely and reliably. This improves the overall stability and reliability of the hydraulic control system. Simultaneously, it avoids overflow caused by excessive system pressure, effectively reducing system heat generation and further improving system reliability.

[0048] In some embodiments, the brake control valve assembly 520 further includes a check valve 525. The check valve 525 is disposed between the pressure reducing valve 524 and the output pipe 220 of the hydraulic pump 200.

[0049] In practical applications, when the hydraulic actuator 100 operates, the hydraulic pressure within the system undergoes complex changes. The resulting pressure fluctuations can be transmitted in reverse through the second oil supply circuit 510 to the brake control valve assembly 520, affecting the normal operation of the braking system. For example, a sudden drop in pressure may lead to insufficient braking force in the brake 400, resulting in ineffective braking and posing a safety hazard. Therefore, by setting a check valve 525, hydraulic oil is only allowed to flow unidirectionally from the output pipe 220 of the hydraulic pump 200 to the pressure reducing valve 524, while preventing the hydraulic oil from flowing back from the pressure reducing valve 524 to the output pipe 220. In this way, the pressure fluctuations generated by the operation of the hydraulic actuator 100 are blocked from the reverse path by the check valve 525, preventing them from affecting the brake 400 and thus avoiding low-pressure alarm shutdown faults. This allows the braking system to maintain reliable and stable braking performance under complex operating conditions, effectively improving the safety and reliability of the hydraulic control system.

[0050] In some embodiments, the hydraulic control system further includes a first pressure detection unit 530. The first pressure detection unit 530 is disposed in the second oil supply circuit 510 and is located between the pressure reducing valve 524 and the oil inlet 522 of the first directional valve 521.

[0051] In the above embodiment, the first pressure detection unit 530 monitors the hydraulic oil pressure after it has been adjusted by the pressure reducing valve 524 in real time, which can determine whether the brake 400 can operate normally. Once the pressure exceeds the normal range, corresponding control measures, such as stopping the machine, can be taken in time to ensure that the entire hydraulic control system is always in a stable and reliable working state.

[0052] It is understandable that the first pressure detection unit 530 is a pressure sensor or pressure gauge, etc.

[0053] In some embodiments, the hydraulic control system further includes an alarm device 600, which is connected to a first pressure detection unit 530. When the pressure detected by the first pressure detection unit 530 is lower than a first preset pressure or higher than a second preset pressure, the alarm device 600 can issue an alarm signal.

[0054] In practical applications, the alarm device 600 internally presets two threshold pressures: a first preset pressure and a second preset pressure. The second preset pressure is higher than the first preset pressure. When the pressure detected by the first pressure detection unit 530 is lower than the first preset pressure, it means the pressure is too low and cannot provide sufficient power to the brake 400. When the pressure detected by the first pressure detection unit 530 is higher than the second preset pressure, it means the pressure is too high and may cause damage. Therefore, whether the pressure is too low or too high, the alarm device 600 will issue an alarm signal to remind the operator to take immediate action or report to the controller for automatic safety measures. This ensures the normal operation of the hydraulic control system.

[0055] Understandably, the first and second preset pressures are determined based on factors such as the brake's design requirements, operating characteristics, and safe pressure range. For example, the first preset pressure is 1.8 MPa (Mega Pascal), and the second preset pressure is 2 MPa.

[0056] In some embodiments, the hydraulic control system further includes a second pressure detection unit 330. The second pressure detection unit 330 is disposed in the first oil supply circuit 310 and located between the output pipe 220 of the hydraulic pump 200 and the drive control valve group 320.

[0057] In the above embodiment, the hydraulic oil pressure after being output from the hydraulic pump 200 but before entering the drive control valve group 320 is monitored in real time by the second pressure detection unit 330 to evaluate the working status of the drive control valve group 320.

[0058] In practical applications, the standby pressure of the drive control valve assembly 320 is set to 2.5 MPa. The pressure reducing valve 524 is set to 2 MPa. Specifically, the drive control valve assembly 320 is a multi-way electrically controlled valve.

[0059] In some embodiments, the hydraulic control system further includes a filter 230. The filter 230 is disposed in the output pipe 220 of the hydraulic pump 200.

[0060] During actual operation, various impurities, such as metal particles, dust, and sludge, inevitably mix into the hydraulic oil. The presence of these impurities can cause serious damage to the hydraulic system. Therefore, by installing a filter 230 on the output pipe 220 of the hydraulic pump 200, the hydraulic oil output from the hydraulic pump 200 can be filtered to remove impurities, thereby reducing the risk of wear and damage to system components caused by impurities.

[0061] In some embodiments, this application also provides a driving device, including the hydraulic control system provided in any of the above embodiments. The hydraulic actuator 100 includes a height adjustment cylinder 800. Thus, the driving device incorporates all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0062] In some embodiments, this application also provides a vehicle including the hydraulic control system provided in any of the above embodiments, or the driving drive device provided in any of the above embodiments. Thus, the vehicle possesses all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0063] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0064] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A hydraulic control system, characterized in that, include: Hydraulic actuators; A hydraulic pump having an input pipe and an output pipe, wherein the input pipe is connected to a hydraulic oil source; The first oil supply circuit is connected at one end to the hydraulic actuator and at the other end to the output pipe of the hydraulic pump; A drive control valve assembly is provided in the first oil supply circuit and located between the output pipe of the hydraulic pump and the hydraulic actuator, for controlling the operation of the hydraulic actuator; Brake; The second oil supply line is connected at one end to the brake and at the other end to the output pipe of the hydraulic pump; A brake control valve assembly is provided in the second oil supply circuit and located between the brake and the output pipe of the hydraulic pump, and is used to control the brake to release the braking action or to initiate the braking action.

2. The hydraulic control system according to claim 1, characterized in that, The brake control valve assembly includes: The first directional valve has an oil inlet and a working oil port. The oil inlet is connected to the output pipe of the hydraulic pump, and the working oil port is connected to the brake.

3. The hydraulic control system according to claim 2, characterized in that, The brake control valve assembly also includes: A pressure reducing valve is located between the oil inlet of the first directional valve and the output pipe of the hydraulic pump.

4. The hydraulic control system according to claim 3, characterized in that, The brake control valve assembly also includes a check valve; the check valve is located between the pressure reducing valve and the output pipe of the hydraulic pump.

5. The hydraulic control system according to claim 3, characterized in that, The hydraulic control system also includes: The first pressure detection unit is installed in the second oil supply circuit and located between the oil inlet of the pressure reducing valve and the first directional valve.

6. The hydraulic control system according to claim 5, characterized in that, The hydraulic control system also includes an alarm device; the alarm device is connected to the first pressure detection unit and issues an alarm signal when the pressure detected by the first pressure detection unit is lower than a first preset pressure or higher than a second preset pressure.

7. The hydraulic control system according to any one of claims 1 to 5, characterized in that, The hydraulic control system also includes: The second pressure detection unit is installed in the first oil supply circuit and located between the output pipe of the hydraulic pump and the drive control valve group.

8. The hydraulic control system according to any one of claims 1 to 5, characterized in that, The hydraulic control system also includes a filter; the filter is disposed in the output pipe of the hydraulic pump.

9. A driving device, characterized in that, include: The hydraulic control system according to any one of claims 1 to 8; wherein the hydraulic actuator includes a height adjustment cylinder.

10. A vehicle, characterized in that, include: The hydraulic control system as described in any one of claims 1 to 8; or The driving drive device as described in claim 9.

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