Hydraulic system and hydrogen energy mine truck

Abstract

The hydraulic system comprises an oil tank, a power unit, a high-pressure filter assembly and a control valve assembly, a mounting groove is formed in the upper end of the oil tank and penetrates through the left side and the right side of the oil tank, the power unit is connected into the mounting groove, and the high-pressure filter assembly is connected with the control valve assembly. The power unit is communicated with the interior of the oil tank through a pipeline, the high-pressure filter assembly is connected to the side, penetrated by the mounting groove, of the oil tank and communicated with the power unit through a pipeline, and the control valve assembly is connected to the upper end of the oil tank and communicated with the high-pressure filter assembly and the execution element through pipelines. An oil return valve set is further arranged on the oil tank and connected with the oil tank and the execution element through pipelines. The power unit, the high-pressure filter assembly, the control valve assembly, the oil return valve set and other key assemblies are integrated around the oil tank, the vehicle space is greatly saved, and the whole hydraulic system is more compact.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic technology, and in particular to a hydraulic system and a hydrogen mining truck. Background Art

[0002] In the field of mining and transportation, hydrogen mining trucks, as an emerging clean energy transportation tool, are gradually replacing traditional fuel mining trucks to reduce carbon emissions and improve operating efficiency. However, the high-power hydraulic system of traditional hydrogen mining trucks usually adopts a decentralized layout, that is, the fuel tank, power unit, control valve assembly block and various hydraulic components are installed in different positions of the vehicle. This layout not only takes up a lot of vehicle space, but also because of the dispersion of components, the oil supply and return pipelines are long and complex in design. In addition, the decentralized layout also increases the difficulty and cost of system maintenance and reduces the reliability and stability of the overall system.

[0003] Especially in special application scenarios with limited space, such as hydrogen mining trucks, the decentralized layout of traditional hydraulic systems is particularly inappropriate. To solve this problem, the industry has tried to adopt partial integration, such as integrating the oil tank with the power unit or integrating the oil tank with the control valve assembly block. However, these partial integration solutions still fail to fundamentally solve the problems of difficulty in overall integration, large space occupation, and complex design. Summary of the invention

[0004] The problem solved by the present invention is: how to optimize the layout of the hydraulic system through integrated design in special application scenarios with limited space such as hydrogen mining trucks, so as to reduce the occupied space, simplify the design and maintenance process, and improve the reliability and stability of the system.

[0005] In order to solve the above problems, the present invention provides a hydraulic system and a hydrogen mining truck.

[0006] In a first aspect, the present invention provides a hydraulic system, comprising: a fuel tank, a power unit, a high-pressure filter assembly and a control valve assembly, wherein an installation groove is provided on one side of the upper end of the fuel tank, the installation groove passes through the left and right sides of the fuel tank, the power unit is connected in the installation groove, the power unit is communicated with the inside of the fuel tank through a pipeline, the high-pressure filter assembly is connected to the side of the fuel tank penetrated by the installation groove, the high-pressure filter assembly is communicated with the power unit through a pipeline, the control valve assembly is connected to the upper end of the fuel tank, and the control valve assembly is communicated with the high-pressure filter assembly and an actuator through pipelines respectively; the power unit is used to convert the hydraulic oil in the fuel tank into a high-pressure state, and transport it to the high-pressure filter assembly for filtration, and then enter the actuator through the control valve assembly to complete a predetermined operation; the fuel tank is also provided with an oil return valve group, and the oil return valve group is connected to the fuel tank and the actuator through pipelines respectively, for the return of the hydraulic oil after the operation is completed.

[0007] Optionally, the power unit includes a motor, a connecting piece and a pump body, the motor is connected to the pump body via the connecting piece, the pump body includes a plunger pump and a gear pump, one end of the plunger pump is connected to the connecting piece, and the other end of the plunger pump is connected to the gear pump.

[0008] Optionally, the axial direction of the motor is consistent with the direction in which the mounting groove passes through the oil tank, the pump body of the power unit is connected to the output shaft at one axial end of the motor, and a shock-absorbing pad is provided between the motor and the mounting groove.

[0009] Optionally, the high-pressure filter assembly is arranged on one side of the pump body, and the high-pressure filter assembly includes a mounting seat, a high-pressure lifting filter and a high-pressure steering filter. The mounting seat is connected to a side of the oil tank close to the gear pump, and the high-pressure lifting filter and the high-pressure steering filter are connected to the mounting seat in parallel at intervals. The high-pressure lifting filter is connected to the gear pump through a pipeline, and the high-pressure steering filter is connected to the plunger pump through a pipeline. The high-pressure lifting filter and the high-pressure steering filter are connected to the control valve assembly through pipelines respectively, and the flow rate of the high-pressure lifting filter is greater than that of the high-pressure steering filter. The high-pressure lifting filter is used to supply oil to the hydraulic lifting system of the hydrogen energy mining truck, and the high-pressure steering filter is used to supply oil to the hydraulic steering system and hydraulic braking system of the hydrogen energy mining truck.

[0010] Optionally, the mounting groove is arranged near the front side of the oil tank and one end of the mounting groove facing the front side of the oil tank is an open structure, the oil return valve group includes a first oil return valve and a second oil return valve, the first oil return valve is connected to the upper end of the oil tank, the first oil return valve is communicated with the actuator and the control valve assembly through pipelines, the control valve assembly is connected with the oil tank through pipelines, the first oil return valve is used for returning hydraulic oil with a large flow rate, the second oil return valve is arranged on the rear side of the oil tank, the second oil return valve is communicated with the actuator and the control valve assembly through pipelines, and the second oil return valve is used for returning hydraulic oil with a small flow rate.

[0011] Optionally, the plunger pump is connected to the interior of the oil tank through an oil return pipeline.

[0012] Optionally, the control valve assembly includes a valve body, on which is provided a cover plate plug-in, a cover plate valve, and an electromagnetic reversing ball valve. The cover plate plug-in and the cover plate valve are used to control the flow rate and flow of oil in the hydraulic lifting system, and the electromagnetic reversing ball valve is used to convert the oil channels between the hydraulic lifting system, the hydraulic steering system, and the hydraulic braking system.

[0013] Optionally, an oil drain valve is provided at the bottom of the oil tank for discharging the hydraulic oil in the oil tank.

[0014] Optionally, mounting blocks are provided on the front and rear sides of the fuel tank, and the mounting blocks are used to be connected to the body of the hydrogen mining truck.

[0015] The beneficial effects of the hydraulic system of the present invention are as follows: the power unit is connected to the installation groove at the upper end of the oil tank, the installation groove extends downward from one side of the oil tank and passes through the left and right sides of the oil tank, and the power unit is connected to the inside of the oil tank through a pipeline to extract the hydraulic oil in the oil tank. The power unit converts the extracted hydraulic oil into a high-pressure state, and then delivers it to the high-pressure filter assembly, which filters the hydraulic oil to remove impurities therein to ensure the purity of the hydraulic oil. The filtered high-pressure hydraulic oil is delivered to the control valve assembly through a pipeline, and the control valve assembly distributes the hydraulic oil to different actuators (such as hydraulic cylinders, hydraulic motors, etc.) according to the operation requirements to complete the predetermined operation. After the operation is completed, the hydraulic oil in the actuator flows back to the return oil valve group through the pipeline, and the return oil valve group then delivers the hydraulic oil back to the oil tank for next use.

[0016] The hydraulic system of the present invention integrates key components such as the power unit, high-pressure filter assembly, control valve assembly and oil return valve group around the oil tank. In particular, the power unit is cleverly installed in the installation groove at the upper end of the oil tank, which greatly saves vehicle space and makes the entire hydraulic system more compact. Since the connecting pipes between the components are greatly shortened and the overall layout is more centralized, the design and installation process of the system is simplified. At the same time, all key components are concentrated near the oil tank, which is convenient for inspection and maintenance, reducing the difficulty and cost of system maintenance. The integrated setting reduces potential failure points caused by the dispersion of components and improves the overall reliability and stability of the system. In addition, the introduction of the high-pressure filter assembly also ensures the purity of the hydraulic oil and further extends the service life of the components of the system.

[0017] In a second aspect, the present invention provides a hydrogen mining truck, including and having the beneficial effects of the above hydraulic system compared with the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of an embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The overall structure of an embodiment of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a schematic structural diagram of a control valve assembly according to one embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Oil tank; 11. Mounting groove; 12. Mounting block; 2. Power unit; 21. Motor; 211. Shock pad; 22. Connector; 23. Pump body; 231. Piston pump; 2311. Oil return line; 232. Gear pump; 3. High-pressure filter assembly; 31. Mounting seat; 32. High-pressure lifting filter; 33. High-pressure steering filter; 4. Control valve assembly; 41. Valve body; 42. Cover plate plug-in; 43. Cover plate valve; 44. Solenoid reversing ball valve; 5. Oil return valve group; 51. First oil return valve; 52. Second oil return valve. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0024] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the drawings represents the left and right position, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0026] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0027] In view of the problems existing in the above-mentioned related technologies, this embodiment provides a hydraulic system and a hydrogen mining truck.

[0028] like Figure 1 , Figure 2As shown, a hydraulic system provided by an embodiment of the present invention comprises: a fuel tank 1, a power unit 2, a high-pressure filter assembly 3 and a control valve assembly 4. A mounting groove 11 is provided at the upper end of the fuel tank 1, and the mounting groove 11 runs through the left and right sides of the fuel tank 1. The power unit 2 is connected in the mounting groove 11, and the power unit 2 is communicated with the inside of the fuel tank 1 through a pipeline. The high-pressure filter assembly 3 is connected to the side of the fuel tank 1 penetrated by the mounting groove 11, and the high-pressure filter assembly 3 is communicated with the power unit 2 through a pipeline. The control valve assembly 4 is connected to the upper end of the fuel tank 1, and the control valve assembly 4 is respectively communicated with the high-pressure filter assembly 3 and the actuator through pipelines; the power unit 2 is used to convert the hydraulic oil in the fuel tank 1 into a high-pressure state, and transport it to the high-pressure filter assembly 3 for filtering, and then enter the actuator through the control valve assembly 4 to complete the predetermined operation; the fuel tank 1 is also provided with a return valve group 5, and the return valve group 5 is respectively connected to the fuel tank 1 and the actuator through pipelines, and is used for the return of the hydraulic oil after the operation is completed.

[0029] Specifically, the oil tank 1 serves as an oil storage container for the hydraulic system. The upper end of the oil tank 1 is recessed downward to form a mounting groove 11. The mounting groove 11 runs through the left and right sides of the oil tank 1, providing convenience for the installation of the power unit 2. At the same time, the oil tank 1 is also provided with an oil return valve group 5 for the return of the hydraulic oil after the operation is completed. The power unit 2 is the power source of the hydraulic system, responsible for converting the hydraulic oil in the oil tank 1 into a high-pressure state. The power unit 2 is compactly connected in the mounting groove 11. The end of the power unit 2 on either side of the left and right sides of the oil tank 1 can be connected to a pipeline, and the pipeline can extend out of the oil tank 1 along the through openings on the left and right sides of the mounting groove 11. In this way, it is convenient for the power unit 2 to be connected to the oil tank 1 or the high-pressure filter assembly 3 through the pipeline, and it is also beneficial to shorten the length of the pipeline. The high-pressure filter assembly 3 is used to filter the hydraulic oil under high pressure to ensure that the hydraulic oil entering the control valve assembly 4 and the actuator is clean and free of impurities. The high-pressure filter assembly 3 is connected to the side of the oil tank 1 penetrated by the installation groove 11, that is, it is located on the left or right side of the oil tank 1. The high-pressure filter assembly 3 is connected to the power unit 2 through a pipeline on this side, which can effectively shorten the length of the connecting pipeline and help to increase the pressure of the hydraulic oil entering the high-pressure filter assembly 3. The control valve assembly 4 is connected to the upper end of the oil tank 1 and is connected to the high-pressure filter assembly 3 and the actuator through a pipeline. By accurately controlling the opening and closing of the control valve assembly 4, accurate control of the actuator can be achieved.

[0030] In this embodiment, the power unit 2 is responsible for converting the hydraulic oil in the oil tank 1 into a high-pressure state to provide power for the entire hydraulic system. The hydraulic oil in the high-pressure state is then transported to the high-pressure filter assembly 3 for filtration. The filtered hydraulic oil is distributed to different actuators (such as hydraulic cylinders, hydraulic motors, etc.) through the control valve assembly 4 to complete the predetermined operation task. After the operation is completed, the hydraulic oil flows back to the oil tank 1 through the return valve group 5 to complete a complete working cycle. In this embodiment, by cleverly setting the mounting groove 11 on the oil tank 1, the key components such as the power unit 2, the high-pressure filter assembly 3 and the control valve assembly 4 are compactly arranged together, which greatly saves vehicle space and makes the entire hydraulic system more compact and efficient. Compared with the traditional decentralized arrangement, the hydraulic system of this embodiment adopts a more integrated arrangement, which reduces the path length and complexity of the oil supply and return pipelines, and reduces the design difficulty and manufacturing cost. Since the connection between the components is more compact and simple, the risk of leakage and failure caused by too long pipelines or complex designs is reduced, thereby improving the reliability and stability of the entire hydraulic system. The integrated design makes system maintenance more convenient. When a component needs to be repaired or replaced, only the corresponding part needs to be disassembled without large-scale disassembly of the entire system.

[0031] Alternatively, if Figure 1 As shown, the power unit 2 includes a motor 21, a connecting member 22 and a pump body 23. The output shaft of the motor 21 is connected to the pump body 23 through the connecting member 22. The pump body 23 includes a plunger pump 231 and a gear pump 232. One end of the plunger pump 231 is connected to the connecting member 22, and the other end of the plunger pump 231 is connected to the gear pump 232.

[0032] Specifically, the motor 21 is used as a power source. The motor 21 is connected to the pump body 23 through the connector 22. The motor 21 provides rotational power to drive the plunger pump 231 and the gear pump 232 inside the pump body 23. The selection of the motor 21 can be determined according to the specific needs and working environment of the hydraulic system. The connector 22 is used to tightly connect the motor 21 and the pump body 23 to ensure the stability and reliability of power transmission. The design of the connector 22 should consider factors such as the output shaft size of the motor 21, the input shaft size of the pump body 23, and the alignment requirements between the two. The pump body 23 contains a plunger pump 231 and a gear pump 232. One side of the plunger pump 231 is connected to the connector 22 to receive the power input of the motor 21. The plunger pump 231 sucks the hydraulic oil in the oil tank 1 through the reciprocating motion of the plunger and compresses it into a high-pressure state, and then outputs it to the high-pressure filter assembly 3 for filtration. The plunger pump 231 is used to generate high-pressure hydraulic oil to supply oil to the hydraulic steering system and hydraulic brake system of the hydrogen energy mining truck. The gear pump 232 is connected to the plunger pump 231 (possibly through a transmission mechanism such as a shaft or a gear) to form an integral power unit for outputting a large flow of low-pressure hydraulic oil for supplying oil to the hydraulic lifting system of the hydrogen mining truck.

[0033] In this optional embodiment, driven by the motor 21, the plunger pump 231 starts to work, sucks the hydraulic oil in the oil tank 1 and compresses it into a high-pressure state through the reciprocating motion of the plunger. At the same time, the gear pump 232 may also be working, and combined with the plunger pump 231 to provide the system with a large flow of low-pressure hydraulic oil. The plunger pump 231, with its high pressure and large flow characteristics, can meet the hydraulic system's demand for high-pressure hydraulic oil. At the same time, the gear pump 232, as a low-pressure oil circuit, can provide a more stable flow and pressure, thereby improving the performance of the entire power unit 2. By integrating the plunger pump 231 and the gear pump 232 in the same pump body 23, the working states of the two can be flexibly adjusted according to actual needs, and the independent or coordinated supply of high-pressure and low-pressure hydraulic oil can be achieved, thereby improving the flexibility and adaptability of the hydraulic system. Integrating the plunger pump 231 and the gear pump 232 in the power unit 2 reduces the number of connecting pipes and joints between components, and reduces the complexity and failure rate of the system. At the same time, this integrated setting also further optimizes the spatial layout, making the power unit 2 more compact and efficient. Since the plunger pump 231 and the gear pump 232 are integrated in the same pump body 23 and tightly connected to the motor 21 through the connector 22, it is only necessary to inspect and repair the power unit 2 as a whole during maintenance, without the need to disassemble and replace each component separately, thus reducing maintenance costs and time costs.

[0034] Alternatively, if Figure 1As shown, the axial direction of the motor 21 is consistent with the direction in which the mounting groove 11 passes through the oil tank 1, the pump body 23 of the power unit 2 is connected to the output shaft at one axial end of the motor 21, and a shock-absorbing pad 211 is provided between the motor 21 and the mounting groove 11.

[0035] Specifically, the axial direction of the motor 21 is consistent with the direction in which the mounting slot 11 passes through the oil tank 1. The pump body 23 of the power unit 2 is connected to the output shaft at one end of the axial direction of the motor 21 and extends out of the mounting slot 11 so as to be connected to the oil tank 1 and the high-pressure filter assembly 3 through a pipeline. In order to further improve the stability and reliability of the system, a shock-absorbing pad 211 is provided between the motor 21 and the mounting slot 11. The material selection of the shock-absorbing pad 211 should be determined according to factors such as the weight, vibration frequency and working environment of the motor 21. Common materials of the shock-absorbing pad 211 include rubber, spring, polyurethane, etc., which have good elasticity, wear resistance and corrosion resistance. The structural design of the shock-absorbing pad 211 should be determined according to the installation method and size of the motor 21. Common structures of the shock-absorbing pad 211 include flat plate, wave type, cone, etc., which can effectively absorb and disperse vibration energy and improve the shock absorption effect. The shock-absorbing pad 211 should be firmly installed between the motor 21 and the mounting slot 11 to ensure that the motor 21 will not loosen or shift due to vibration during operation. At the same time, the installation position and direction of the shock-absorbing pad 211 should also be determined according to the vibration characteristics of the motor 21 and the working environment to achieve the best shock-absorbing effect.

[0036] In this optional embodiment, the vibration and impact generated by the motor 21 during operation are effectively absorbed by the setting of the shock-absorbing pad 211, reducing the interference of the vibration on other components of the hydraulic system, and improving the stability and reliability of the entire system. The shock-absorbing pad 211 can reduce the direct impact and friction between the motor 21 and the mounting slot 11, thereby extending the service life of the motor 21, the mounting slot 11 and other components of the hydraulic system. The elastic properties of the shock-absorbing pad 211 can absorb and disperse vibration energy, reduce the noise generated by vibration, and make the hydraulic system quieter and more comfortable during operation.

[0037] Alternatively, if Figure 1As shown, the high-pressure filter assembly 3 is arranged on one side of the pump body 23. The high-pressure filter assembly 3 includes a mounting seat 31, a high-pressure lifting filter 32 and a high-pressure steering filter 33. The mounting seat 31 is connected to the side of the oil tank 1 close to the gear pump 232. The high-pressure lifting filter 32 and the high-pressure steering filter 33 are connected to the mounting seat 31 in parallel at intervals. The high-pressure lifting filter 32 is connected to the gear pump 232 through a pipeline. The high-pressure steering filter 33 is connected to the plunger pump 231 through a pipeline. The high-pressure lifting filter 32 and the high-pressure steering filter 33 are respectively connected to the control valve assembly 4 through pipelines. The flow rate of the high-pressure lifting filter 32 is greater than that of the high-pressure steering filter 33. The high-pressure lifting filter 32 is used to supply oil to the hydraulic lifting system of the hydrogen energy mining truck, and the high-pressure steering filter 33 is used to supply oil to the hydraulic steering system and hydraulic braking system of the hydrogen energy mining truck.

[0038] Specifically, the high-pressure filter assembly 3 is arranged on one side of the pump body 23, near the position of the plunger pump 231 and the gear pump 232, which facilitates the connection of the pipeline between the high-pressure filter assembly 3 and the power unit 2, optimizes the length of the pipeline, and ensures that the filter can filter the hydraulic oil output from the pump body 23 in a timely and effective manner. The mounting seat 31 serves as a supporting and fixing structure for the high-pressure filter assembly 3. Its design should take into account factors such as the weight, size and installation position of the filter. The mounting seat 31 is fixedly connected to the oil tank 1 by bolts or other connection methods, ensuring the stability and reliability of the filter assembly. The high-pressure lifting filter 32 and the high-pressure steering filter 33 are connected to the mounting seat 31 in parallel at intervals, which optimizes space utilization and facilitates the maintenance and replacement of the filters. At the same time, the intervals between the filters also ensure that they do not interfere with each other during operation. The high-pressure lifting filter 32 is connected to the gear pump 232 through a pipeline to filter the hydraulic oil output by the gear pump 232; the high-pressure steering filter 33 is connected to the plunger pump 231 through a pipeline to filter the hydraulic oil output by the plunger pump 231, ensuring that the filter can accurately filter the hydraulic oil output by each pump to prevent impurities and particulate matter from entering the system. The flow rate of the high-pressure lifting filter 32 is greater than that of the high-pressure steering filter. The hydraulic lifting system usually requires a larger flow rate to meet the lifting requirements of heavy objects, while the hydraulic steering system and the hydraulic braking system have relatively low flow requirements. Therefore, using filters with different flow rates to meet the needs of each system can ensure the normal operation and optimal performance of the system.

[0039] In this optional embodiment, the high-pressure filter assembly 3 effectively filters impurities and particulate matter in the hydraulic oil, protects the components of the hydraulic system from wear and blockage, and improves the reliability and stability of the system. The high-pressure lifting filter 32 and the high-pressure steering filter 33 are connected in parallel on the mounting seat 31, which optimizes the spatial layout, reduces the length of the pipeline and the number of joints, and reduces the complexity and failure rate of the system. The high-pressure lifting filter 32 and the high-pressure steering filter 33 meet the different requirements of the hydraulic lifting system, the hydraulic steering system and the hydraulic braking system respectively, ensuring that each system can work normally and perform at its best.

[0040] Alternatively, if Figure 2 As shown, the mounting groove 11 is arranged near the front side of the oil tank 1 and the end of the mounting groove 11 facing the front side of the oil tank 1 is an open structure, the oil return valve group 5 includes a first oil return valve 51 and a second oil return valve 52, the first oil return valve 51 is connected to the upper end of the oil tank 1, the first oil return valve 51 is communicated with the actuator and the control valve assembly 4 through pipelines, the control valve assembly 4 is communicated with the oil tank 1 through pipelines, the first oil return valve 51 is used for returning hydraulic oil with a large flow rate, the second oil return valve 52 is arranged on the rear side of the oil tank 1, the second oil return valve 52 is communicated with the actuator and the control valve assembly 4 through pipelines, and the second oil return valve 52 is used for returning hydraulic oil with a small flow rate.

[0041] Specifically, the end of the installation groove 11 facing the front side of the oil tank 1 is an open structure, which means that there is no wall body on the installation groove 11 facing the front side of the oil tank 1. At this time, the oil tank 1 can be seen as an L-shaped structure from the left and right sides. Such an oil tank 1 has a simple shape and is easier to process, and it is more convenient to install the power unit 2. The first oil return valve 51 is connected to the upper end of the oil tank 1 to facilitate the smooth return of the oil. The first oil return valve 51 is connected to the actuator and the control valve assembly 4 through pipelines. After the actuator completes the work, the excess hydraulic oil will flow back to the oil tank 1 through these pipelines through the control valve assembly 4. The control valve assembly 4 controls the flow of the hydraulic oil returning to the oil tank 1. The first oil return valve 51 is used to handle the return of hydraulic oil with a large flow rate. The internal structure of the first oil return valve 51 (such as the valve core, the valve seat, etc.) has a large flow area to ensure that good oil return performance and stability can be maintained under high flow, which helps to quickly handle a large number of oil return tasks and improve the overall efficiency of the system. The second oil return valve 52 is arranged on the side of the oil tank 1 away from the power unit 2, which helps to reduce interference with the power unit 2 and facilitates the oil return operation on the other side of the oil tank 1. The second oil return valve 52 is connected to the actuator and the control valve assembly 4 through a pipeline to handle the return of hydraulic oil with a small flow rate. The internal structure of the second oil return valve 52 has a smaller flow area to meet the needs of small flow rate oil return, which helps to provide precise oil return control when needed and improve the stability and reliability of the system. At the same time, by assigning the large flow rate and small flow rate oil return tasks to different oil return valves, the oil return process of the hydraulic system can be managed more effectively.

[0042] In this optional embodiment, by separately setting up large-flow and small-flow oil return valves, the oil return process of the hydraulic system can be managed more effectively. The large-flow oil return valve can quickly handle a large number of oil return tasks, while the small-flow oil return valve can provide precise oil return control when needed. The division of labor and cooperation helps to improve the overall efficiency of the system. By separately setting up large-flow and small-flow oil return valves, the needs of the hydraulic system under different working conditions can be better met. This helps to enhance the stability and reliability of the system and increase the service life of the system.

[0043] Alternatively, if Figure 2 As shown, the plunger pump 231 is connected to the interior of the oil tank 1 through the oil return pipeline 2311.

[0044] Specifically, while the oil produced by the plunger pump 231 is supplied to the hydraulic system, a portion of the oil will flow back to the oil tank 1 through the return oil line 2311. The return oil line 2311 connects the plunger pump and the oil tank 1, which can ensure that the excess oil produced by the plunger pump 231 can flow smoothly back to the oil tank 1, avoiding excessive system pressure or oil waste.

[0045] In this optional embodiment, the plunger pump 231 is connected to the oil tank 1 through the oil return line 2311, which can ensure that the excess oil generated by the hydraulic system during operation can flow back to the oil tank 1 in time to avoid excessive system pressure or oil waste. The setting of the oil return line 2311 can ensure that the flow of oil in the hydraulic system during operation is more stable and orderly, which helps to reduce pressure fluctuations and flow changes in the system and enhance the stability of the system.

[0046] Alternatively, if Figure 3 As shown, the control valve assembly 4 includes a valve body 41, on which are provided a cover plate plug-in 42, a cover plate valve 43, and an electromagnetic reversing ball valve 44. The cover plate plug-in 42 and the cover plate valve 43 are used to control the flow rate and flow of the oil in the hydraulic lifting system, and the electromagnetic reversing ball valve 44 is used to switch the oil channels between the hydraulic lifting system, the hydraulic steering system, and the hydraulic braking system.

[0047] Specifically, as the main part of the control valve assembly 4, the valve body 41 needs to have sufficient strength and sealing to ensure that the oil can flow stably without leakage under high pressure. At the same time, the internal structure of the valve body 41 needs to be reasonably designed to accommodate components such as the cover plate plug-in 42, the cover plate valve 43 and the electromagnetic reversing ball valve 44, and ensure that they can work normally. The cover plate plug-in 42 and the cover plate valve 43 may include components such as throttle holes and flow control valve cores. The size and shape of the throttle holes can be designed according to actual needs to achieve different flow rates and flow control effects; the flow control valve core can be adjusted manually or electrically to adapt to different working conditions. The electromagnetic reversing ball valve 44 is usually composed of components such as an electromagnet, a valve core, a valve seat and a spring. When the electromagnet is energized, a magnetic force is generated to attract the valve core to move, thereby changing the flow direction of the oil. There needs to be good sealing between the valve core and the valve seat to ensure that the oil does not leak. At the same time, the elastic force of the spring needs to be moderate so that the valve core can be reset to the initial position when the electromagnet is powered off.

[0048] In this optional embodiment, the cover plate plug-in 42 and the cover plate valve 43 are used as control elements. Through their internal structural design (such as throttling holes, flow regulating valve cores, etc.), they can achieve precise control of the oil flow rate and flow rate through the valve body 41. When the hydraulic lifting system needs to adjust the working state (such as lifting speed, load capacity, etc.), by adjusting the opening degree of the cover plate plug-in 42 and the cover plate valve 43, the flow cross-section of the oil can be changed, thereby adjusting the flow rate and flow rate of the oil to meet the working requirements of the system. The electromagnetic reversing ball valve 44 is a valve component that controls the position of the valve core through electromagnetic force to change the flow direction of the oil. When the hydraulic lifting system, hydraulic steering system or hydraulic braking system needs to switch work, after the electromagnetic reversing ball valve 44 receives the corresponding control signal, the electromagnet inside it will generate magnetic force, attract or repel the valve core, and move the valve core to a predetermined position, thereby changing the flow direction of the oil and realizing the oil channel conversion between different systems. The introduction of the electromagnetic reversing ball valve 44 enables rapid oil channel switching between the hydraulic lifting system, hydraulic steering system, and hydraulic braking system, thereby improving the flexibility and response speed of the entire hydraulic system. The precise control function of the cover plate plug-in 42 and the cover plate valve 43 enables the oil flow rate and flow of the hydraulic lifting system to be fine-tuned according to actual needs, thereby improving the control accuracy and stability of the system.

[0049] Optionally, an oil drain valve is provided at the bottom of the oil tank 1 for draining the hydraulic oil in the oil tank 1 .

[0050] Specifically, the drain valve can be manually operated (such as a valve with a handle or knob) or automatically controlled (such as a valve driven by an electric or pneumatic actuator). Manual drain valves are suitable for equipment that requires frequent manual operation or maintenance, while automatic drain valves are more suitable for applications that require remote control or regular automatic discharge. The sealing performance of the drain valve is crucial to preventing hydraulic oil leakage. The sealing element between the valve core and the oil tank 1 of the drain valve needs to be made of high-quality materials and ensure that it can withstand corrosion and wear in the hydraulic oil and working environment. Although the main purpose of the drain valve is to discharge hydraulic oil, in some cases, it may also be necessary to control its flow. This can be achieved by adding a throttle hole or a flow regulator to the drain valve so that the discharge speed can be adjusted as needed.

[0051] In this optional embodiment, the oil drain valve allows the hydraulic oil in the oil tank 1 to be easily discharged, which is crucial for operations such as cleaning, repairing and replacing the hydraulic oil in the oil tank 1.

[0052] Alternatively, if Figure 1 , Figure 2 As shown, mounting blocks 12 are provided at the front and rear sides of the fuel tank 1, and the mounting blocks 12 are used to be connected to the body of the hydrogen energy mining truck.

[0053] Specifically, the mounting block 12 can be made of high-strength, corrosion-resistant materials to ensure its durability and reliability during use. At the same time, the shape, size and position of the mounting block 12 should be reasonably designed according to the actual structure of the fuel tank 1 and the vehicle body to ensure the best connection effect and stability. Design a suitable connection structure (such as bolt holes, buckles, etc.) on the mounting block 12, and select appropriate fasteners (such as bolts, nuts, etc.) for connection. In addition, it is also possible to consider using auxiliary components such as shock-absorbing pads 211 and sealing pads to improve the tightness and stability of the connection.

[0054] In this optional embodiment, the mounting block 12 enables the fuel tank 1 to be more firmly mounted on the body of the hydrogen mining truck, reducing the potential safety hazard caused by shaking or falling off of the fuel tank 1. Through the standardized mounting block 12, the installation and removal process of the fuel tank 1 becomes simpler and faster, reducing maintenance costs and time. The mounting block 12 enables the fuel tank 1 to adapt to hydrogen mining trucks of different models and specifications, improving the versatility and applicability of the fuel tank 1.

[0055] A hydrogen mining truck provided in an embodiment of the present invention includes the hydraulic system as described above.

[0056] The beneficial effects of the hydrogen mining truck of this embodiment relative to the prior art are the same as those of the above-mentioned hydraulic system, which will not be described in detail here.

[0057] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A hydraulic system, characterized in that: include: An oil tank (1), a power unit (2), a high-pressure filter assembly (3) and a control valve assembly (4), wherein an installation groove (11) is provided at the upper end of the oil tank (1), the installation groove (11) passes through the left and right sides of the oil tank (1), the power unit (2) is connected in the installation groove (11), the power unit (2) is communicated with the inside of the oil tank (1) through a pipeline, the high-pressure filter assembly (3) is connected to the side of the oil tank (1) passed through by the installation groove (11), the high-pressure filter assembly (3) is communicated with the power unit (2) through a pipeline, and the control valve assembly (4) is connected to the side of the oil tank (1) passed through by the installation groove (11), the high-pressure filter assembly (3) is communicated with the power unit (2) through a pipeline, and the control valve assembly (4) is connected to the oil tank (1). The valve assembly (4) is connected to the upper end of the oil tank (1), and the control valve assembly (4) is connected to the high-pressure filter assembly (3) and the actuator through pipelines respectively; the power unit (2) is used to convert the hydraulic oil in the oil tank (1) into a high-pressure state, and transport it to the high-pressure filter assembly (3) for filtering, and then enter the actuator through the control valve assembly (4) to complete the predetermined operation; the oil tank (1) is also provided with an oil return valve group (5), and the oil return valve group (5) is connected to the oil tank (1) and the actuator through pipelines respectively, and is used for the return of the hydraulic oil after the operation is completed.

2. The hydraulic system according to claim 1, characterized in that: The power unit (2) comprises a motor (21), a connecting piece (22) and a pump body (23); the motor (21) is connected to the pump body (23) via the connecting piece (22); the pump body (23) comprises a plunger pump (231) and a gear pump (232); one end of the plunger pump (231) is connected to the connecting piece (22), and the other end of the plunger pump (231) is connected to the gear pump (232).

3. The hydraulic system according to claim 2, characterized in that: The axial direction of the motor (21) is consistent with the direction in which the mounting groove (11) passes through the oil tank (1); the pump body (23) of the power unit (2) is connected to the output shaft at one axial end of the motor (21); and a shock-absorbing pad (211) is provided between the motor (21) and the mounting groove (11).

4. The hydraulic system according to claim 2, characterized in that: The high-pressure filter assembly (3) is arranged on one side of the pump body (23), and the high-pressure filter assembly (3) comprises a mounting seat (31), a high-pressure lifting filter (32) and a high-pressure steering filter (33). The mounting seat (31) is connected to a side of the oil tank (1) close to the gear pump (232), the high-pressure lifting filter (32) and the high-pressure steering filter (33) are connected to the mounting seat (31) in parallel with each other at intervals, and the high-pressure lifting filter (32) is connected to the gear pump (232) through a pipeline. ), the high-pressure steering filter (33) is connected to the plunger pump (231) through a pipeline, the high-pressure lifting filter (32) and the high-pressure steering filter (33) are respectively communicated with the control valve assembly (4) through pipelines, the flow rate of the high-pressure lifting filter (32) is greater than that of the high-pressure steering filter (33), the high-pressure lifting filter (32) is used to supply oil to the hydraulic lifting system of the hydrogen energy mining truck, and the high-pressure steering filter (33) is used to supply oil to the hydraulic steering system and hydraulic braking system of the hydrogen energy mining truck.

5. The hydraulic system according to claim 4, characterized in that: The mounting groove (11) is arranged near the front side of the oil tank (1) and one end of the mounting groove (11) facing the front side of the oil tank (1) is an open structure. The oil return valve group (5) comprises a first oil return valve (51) and a second oil return valve (52). The first oil return valve (51) is connected to the upper end of the oil tank (1). The first oil return valve (51) is communicated with the actuator and the control valve assembly (4) through pipelines respectively. The control valve assembly (4) is communicated with the inside of the oil tank (1) through pipelines. The first oil return valve (51) is used for returning hydraulic oil with a large flow rate. The second oil return valve (52) is arranged at the rear side of the oil tank (1). The second oil return valve (52) is communicated with the actuator and the control valve assembly (4) through pipelines respectively. The second oil return valve (52) is used for returning hydraulic oil with a small flow rate.

6. The hydraulic system according to claim 5, characterized in that: The plunger pump (231) is connected to the interior of the oil tank (1) via an oil return pipeline (2311).

7. The hydraulic system according to claim 4, characterized in that: The control valve assembly (4) comprises a valve body (41), on which a cover plate plug-in (42), a cover plate valve (43), and an electromagnetic reversing ball valve (44) are provided. The cover plate plug-in (42) and the cover plate valve (43) are used to control the flow rate and flow rate of oil in the hydraulic lifting system, and the electromagnetic reversing ball valve (44) is used to switch the oil channels between the hydraulic lifting system, the hydraulic steering system, and the hydraulic braking system.

8. The hydraulic system according to claim 1, characterized in that: An oil drain valve is provided at the bottom of the oil tank (1) for draining the hydraulic oil in the oil tank (1).

9. The hydraulic system according to claim 1, characterized in that: The oil tank (1) is provided with mounting blocks (12) at the front and rear sides thereof, and the mounting blocks (12) are used to be connected to the body of a hydrogen mining truck.

10. A hydrogen energy mining card, characterized in that: Comprising a hydraulic system as claimed in any one of claims 1 to 9.

Images