A hydraulic oil tank for a mine dump truck and a working method

Abstract

The application discloses a hydraulic oil tank of a mine dump truck and a working method, solves the problem of interference on the oil temperature of an oil suction chamber caused by the excessively high oil return temperature, and solves the problem of inconsistent service life of an oil return filter caused by different long-term working conditions; the technical scheme comprises an oil tank body, an oil suction filter and an oil return filter; the oil tank body is divided into an oil suction chamber and an oil return chamber, a plurality of openings are arranged on a partition plate, the lower part of the oil suction chamber is provided with the oil suction filter, the upper part of the oil return chamber is provided with an oil return filter bin, the oil return filter bin is provided with the oil return filter, the oil return filter comprises a first oil return filter and a second oil return filter, the lower end of the first oil return filter is connected with one end of an oil return pipe, the other end of the oil return pipe is connected with an oil return flange on the lower side wall of the oil return chamber, the lower end of the second oil return filter is provided with an oil return filter tail pipe, and the oil return pipe and the oil return filter tail pipe are located below the oil return filter bin.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic system technology, specifically relating to a hydraulic oil tank and its working method for a mining dump truck. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] As a crucial component of the hydraulic system in mining dump trucks, the hydraulic oil tank plays a vital role in ensuring the reliability and stability of the hydraulic system, reducing heat generation in the hydraulic circuit, and improving the overall heat dissipation of the vehicle's hydraulic system. The internal structure and layout of the oil tank are particularly important. The hydraulic oil tank should be able to provide feedback on the hydraulic oil level and temperature, as well as settle impurities in the hydraulic oil. However, controlling the oil temperature and settling impurities are especially critical. Currently, due to limitations in vehicle size and layout, the internal structure of the oil tank is often unsuitable, failing to meet these requirements.

[0004] The existing hydraulic oil tank has two filters fixed in separate filter cartridges, with hydraulic oil entering the filters from the side of the cartridges. One of the two return oil filters filters the hydraulic oil under full operating conditions, while the other filters it under partial operating conditions. This results in inconsistent service life for the two filter elements. Furthermore, due to structural limitations, the return oil temperature can easily interfere with the oil temperature in the suction chamber, leading to instability in the hydraulic system and reduced work efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a hydraulic oil tank and its operating method for a mining dump truck, which solves the problem of excessively high return oil temperature interfering with the oil temperature in the suction chamber, ensuring stable operation of the hydraulic system and improving work efficiency. It also solves the problem of inconsistent service life of the return oil filter due to different long-term operating conditions.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a hydraulic oil tank for a mining dump truck, comprising an oil tank body, an oil suction filter, and an oil return filter; a vertical partition plate is provided in the middle of the oil tank body, the partition plate dividing the oil tank body into an oil suction chamber and an oil return chamber, and the partition plate is provided with a plurality of openings; the oil suction filter is provided in the lower part of the oil suction chamber, and an oil suction flange is provided on the lower side wall of the oil suction chamber, the oil suction filter being installed on the oil suction flange; The upper part of the oil return chamber is provided with an oil return filter compartment, and an oil return filter is provided in the oil return filter compartment. The upper end of the oil return filter is engaged with the oil return filter top seat at the top of the oil return filter compartment, and the lower end of the oil return filter is engaged with the oil return filter base at the bottom of the oil return filter compartment. The oil return filter includes a first oil return filter and a second oil return filter. The lower end of the first oil return filter is connected to one end of the oil return pipe, and the other end of the oil return pipe is connected to the oil return flange on the lower side wall of the oil return chamber. The lower end of the second oil return filter is provided with an oil return filter tail pipe. The oil return pipe and the oil return filter tail pipe are located below the oil return filter compartment.

[0007] Furthermore, multiple oil suction filters and oil suction flanges are provided, and the number of oil suction filters and oil suction flanges is the same, with one oil suction filter installed for each oil suction flange.

[0008] Furthermore, the oil suction flange is provided with an oil pipe connection hole for installing an external hydraulic oil pipe.

[0009] Furthermore, a limiting tube for the return oil filter is provided on the top seat of the return oil filter, and a return oil filter cover plate is provided at the upper end of the limiting tube. A compression spring is installed between the return oil filter cover plate and the return oil filter.

[0010] Furthermore, multiple oil return pipes and multiple oil return flanges are provided, and the number of oil return pipes and oil return flanges is the same, with one oil return pipe installed on each oil return flange.

[0011] Furthermore, the return flange is also provided with an oil pipe connection hole for installing external hydraulic oil pipes.

[0012] Furthermore, an oil filling port is provided on the top plate of the oil suction chamber, and an air filter is installed at the oil filling port to release the gas pressure in the oil tank and prevent impurities from entering the oil tank.

[0013] Furthermore, an oil receiving box is provided below the oil filling port and inside the oil suction chamber to prevent hydraulic oil from overflowing through the oil filling port and air filter; several overflow holes are provided on the side wall of the oil receiving box to allow the hydraulic oil in the oil receiving box to flow into the oil suction chamber.

[0014] Furthermore, the return oil filter tail pipe is a cylindrical structure with one end open, and several micropores are provided on the side wall. The open end of the return oil filter tail pipe is connected to the second return oil filter.

[0015] Secondly, the present invention also provides a method for using the hydraulic oil tank of a mining dump truck, including: S1. The hydraulic pump in the hydraulic system of the mining dump truck is connected to the suction flange via hydraulic pipeline. The hydraulic oil enters the hydraulic pump from the suction filter and then flows into the working parts from the hydraulic pump. S2. Hydraulic oil returns from the working parts to the hydraulic pipeline, connects to the return oil flange through the hydraulic pipeline, and then is introduced from the bottom of the return oil filter chamber into the first return oil filter through multiple return oil pipes at the bottom of the return oil filter chamber. After the hydraulic oil is filtered once, it enters the return oil filter chamber, and then undergoes secondary filtration through the second return oil filter. It then returns to the return oil chamber through the return oil filter tail pipe. The hydraulic oil returning to the oil tank from the hydraulic system flows into the suction chamber from the return oil chamber through several openings on the partition plate, and this process is repeated.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention divides the oil tank body into an oil suction chamber and an oil return chamber by setting a vertical partition plate. This effectively avoids mutual interference between the oil suction and return processes, making the oil flow within the tank more orderly and preventing the return oil temperature from interfering with the oil temperature in the suction chamber, thus helping to ensure the stable operation of the hydraulic system. An oil suction filter is installed at the bottom of the suction chamber to prevent impurities from entering the subsequent hydraulic system, protecting related components from damage and extending the equipment's service life. An oil return filter chamber is installed at the top of the oil return chamber, equipped with a first and a second oil return filter, providing dual filtration of the return oil and more thoroughly removing impurities generated or mixed into the oil during operation. An oil suction flange is installed on the lower side wall of the suction chamber for installing the oil suction filter, avoiding the problem in traditional mining dump trucks where the oil return filter enters from the side, resulting in blockage near the inlet while the furthest part remains unfiltered. It also avoids the problem in traditional mining dump trucks where one of the two oil return filters filters hydraulic oil under full-condition conditions while the other filters hydraulic oil under partial-condition conditions, leading to inconsistent filter lifespans.

[0017] The present invention provides a limiting tube for the return oil filter on the top seat of the return oil filter. The upper end of the limiting tube is provided with a return oil filter cover plate. A compression spring is installed between the return oil filter cover plate and the return oil filter. When the return oil filter cover plate closes the mounting hole, the compression spring is in a compressed state to prevent the return oil filter from being displaced due to hydraulic shock or vehicle impact during installation and operation, which would cause the return oil filter to fall off and fail. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a structural diagram of the hydraulic oil tank of the mining dump truck of the present invention; Figure 2This is a diagram showing the internal structure of the hydraulic oil tank of the mining dump truck of the present invention; Figure 3 This is a schematic diagram of the return oil filter structure of the present invention; Figure 4 This is a partial structural diagram of the oil receiving box and oil filling port of the present invention.

[0020] In the diagram: 1. Fuel tank body; 2. Air filter; 3. Return oil filter cover; 4. Suction flange; 5. Return oil flange; 6. Oil receiving box; 7. Divider plate; 8. Suction filter; 9. Return oil filter chamber; 10. Return oil filter top seat; 11. First return oil filter; 12. Return oil filter base; 13. Return oil filter tail pipe; 14. Return oil pipe; 15. Compression spring; 16. Second return oil filter; 17. Filler port; 18. Overflow hole. Detailed Implementation

[0021] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. This embodiment discloses a hydraulic oil tank for a mining dump truck, such as... Figures 1-3 As shown, the system includes an oil tank body 1, an oil suction filter 8, and an oil return filter. A vertical partition plate 7 is provided in the middle of the oil tank body 1, dividing it into an oil suction chamber and an oil return chamber. The partition plate 7 has several openings. The oil suction filter 8 is located at the lower part of the oil suction chamber, and an oil suction flange 4 is provided on the lower side wall of the oil suction chamber. The oil suction filter 8 is mounted on the oil suction flange 4. By dividing the oil tank body 1 into an oil suction chamber and an oil return chamber using the vertical partition plate 7, mutual interference between the oil suction and return processes can be effectively avoided, making the flow of oil in the oil tank more orderly and helping to ensure the stable operation of the hydraulic system. The oil suction filter 8 located at the lower part of the oil suction chamber can perform preliminary filtration of the sucked-in oil, intercepting impurities and preventing them from entering the subsequent hydraulic system, protecting related components from damage by impurities, and extending the service life of the equipment. The upper part of the oil return chamber is provided with an oil return filter chamber 9, which contains an oil return filter. The upper end of the oil return filter is engaged with the top oil return filter seat 10 at the top of the oil return filter chamber 9, and the lower end of the oil return filter is engaged with the bottom oil return filter base 12 at the bottom of the oil return filter chamber 9. The oil return filter includes a first oil return filter 11 and a second oil return filter 16. The oil return filter chamber 9 at the upper part of the oil return chamber, and the configuration of the first oil return filter 11 and the second oil return filter 16, provide dual filtration for the oil return, which can more thoroughly remove impurities generated or mixed into the oil during operation, further improving the oil quality. The quality of the hydraulic fluid ensures the reliability of the hydraulic system. The lower end of the first return oil filter 11 is connected to one end of the return oil pipe 14, and the other end of the return oil pipe 14 is connected to the return oil flange 5 on the lower side wall of the return oil chamber. The lower end of the second return oil filter 16 is provided with a return oil filter tail pipe 13. The return oil pipe 14 and the return oil filter tail pipe 13 are located below the return oil filter chamber 9. The lower side wall of the suction chamber is provided with a suction flange 4 for installing the suction filter 8, which avoids the phenomenon in traditional mining dump trucks where the return oil filter enters from the side, causing the part of the return oil filter closer to the oil inlet to become clogged, while the part farther away is not filtered. It also avoids the problem in traditional mining dump trucks where one of the two return oil filters filters the hydraulic oil under full working conditions, while the other filters the hydraulic oil under partial working conditions, resulting in inconsistent service life of the two filter elements.

[0023] Multiple oil suction filters 8 and oil suction flanges 4 are provided, and the number of oil suction filters 8 and oil suction flanges 4 is the same. Each oil suction flange 4 corresponds to one oil suction filter 8. The oil suction flange 4 is provided with an oil pipe connection hole for installing an external hydraulic oil pipe. The hydraulic pump suction port of the mining dump truck hydraulic system is connected to the oil suction flange 4 through a hydraulic oil pipe. The hydraulic oil enters the hydraulic pump from the oil suction filter 8, and then flows into the working parts from the hydraulic pump. This can perform preliminary filtration of the sucked oil, intercept impurities, prevent them from entering the subsequent hydraulic system, and extend the service life of the equipment.

[0024] The upper end of the return oil filter is engaged with the return oil filter top seat 10 at the top of the return oil filter chamber 9, and the lower end of the return oil filter is engaged with the return oil filter base 12 at the bottom of the return oil filter chamber 9. The return oil filter top seat 10 is provided with a limit tube for the return oil filter, and the upper end of the limit tube is provided with a return oil filter cover plate 3. A compression spring 15 is installed between the return oil filter cover plate 3 and the return oil filter. When the return oil filter cover plate 3 closes the mounting hole, the compression spring 15 is in a compressed state to prevent the return oil filter from being displaced by hydraulic shock or vehicle impact during installation and operation, thereby causing the return oil filter to fall off and fail. The return oil filter base 12 is provided with an oil passage hole for returning hydraulic oil to the return oil filter chamber 9 and filtering the hydraulic oil in the return oil filter chamber 9 before entering the return oil chamber.

[0025] Multiple return oil pipes 14 and return oil flanges 5 are provided, and the number of return oil pipes 14 and return oil flanges 5 is the same. Each return oil flange 5 is equipped with a corresponding return oil pipe 14. The return oil flange 5 is also provided with an oil pipe connection hole for installing an external hydraulic oil pipe. The hydraulic oil pipe returns from the working part to the hydraulic oil pipe, and enters the return oil pipe 14 through the hydraulic oil pipe connected to the return oil flange 5. After being filtered, it enters the oil tank.

[0026] A filler port 17 is provided on the top plate of the oil suction chamber, and an air filter 2 is installed at the filler port 17. The main function of the air filter 2 is to draw in or expel air when adding hydraulic oil and when the oil level in the tank changes, and to prevent impurities from entering the oil tank. When the vehicle is running, the hydraulic oil will slosh inside the oil tank, and when the sloshing is violent, air will overflow from the air filter 2. Figure 4 As shown, an oil receiving box 6 is provided at the lower part of the filler port 17 and inside the oil suction chamber to prevent hydraulic oil from overflowing through the filler port 17 and the air filter 2. Several overflow holes 18 are provided on the side wall of the oil receiving box 6 to allow hydraulic oil splashed into the oil receiving box 6 to flow into the oil suction chamber. When hydraulic oil is added through the filler port 17, the hydraulic oil flows into the oil receiving box 6 and then into the oil tank through the overflow holes 18. When the vehicle is moving and the hydraulic oil sloshes inside the oil tank, a small amount of hydraulic oil will enter the oil receiving box 6 through the overflow holes 18, thus preventing hydraulic oil from overflowing.

[0027] The working method includes the following steps: S1. The hydraulic pump suction port of the mining dump truck hydraulic system is connected to the suction flange 4 through the hydraulic pipeline. The hydraulic oil enters the hydraulic pump from the suction filter 8 and then flows into the working parts from the hydraulic pump. S2. Hydraulic oil returns from the working parts to the hydraulic pipeline, connects to the return oil flange 5 through the hydraulic pipeline, and then enters the first return oil filter 11 from the bottom of the return oil filter chamber 9 through multiple return oil pipes 14 at the bottom of the return oil filter chamber 9. After the hydraulic oil undergoes primary filtration, it enters the return oil filter chamber 9, undergoes secondary filtration through the second return oil filter 16, and returns to the return oil chamber through the return oil filter tail pipe 13. The hydraulic oil returning to the oil tank from the hydraulic system flows into the suction chamber from the return oil chamber through several openings on the partition plate 7. This can settle the denser impurities inside the hydraulic oil and leave them in the return oil chamber, reducing the contamination of the suction filter 8 and extending the service life of the filter. The bottom return oil method allows the hydraulic oil to enter from the entire return oil filter screen, avoiding the phenomenon in traditional mining dump trucks where the return oil filter enters from the side, and the part of the filter close to the oil inlet is blocked while the part farther away is not filtered. It also avoids the problem in traditional mining dump trucks where one of the two return oil filters filters the hydraulic oil under full working conditions and the other filters the hydraulic oil under partial working conditions, resulting in inconsistent service life of the two filter elements.

[0028] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A hydraulic oil tank for a mining dump truck, characterized in that, The system includes an oil tank body, an oil suction filter, and an oil return filter. A vertical partition plate is provided in the middle of the oil tank body, which divides the oil tank body into an oil suction chamber and an oil return chamber. The partition plate has several openings. The oil suction filter is provided at the lower part of the oil suction chamber, and an oil suction flange is provided on the lower side wall of the oil suction chamber. The oil suction filter is installed on the oil suction flange. The upper part of the return oil chamber is provided with a return oil filter compartment, and the return oil filter compartment is provided with a return oil filter. The upper end of the return oil filter is engaged with the return oil filter top seat at the top of the return oil filter compartment, and the lower end of the return oil filter is engaged with the return oil filter base at the bottom of the return oil filter compartment. The return oil filter includes a first return oil filter and a second return oil filter. The lower end of the first return oil filter is connected to one end of the return oil pipe, and the other end of the return oil pipe is connected to the return oil flange on the lower side wall of the return oil chamber. The lower end of the second return oil filter is provided with a return oil filter tail pipe. The return oil pipe and the return oil filter tail pipe are located below the return oil filter compartment. The oil return filter top seat is provided with a limiting tube for the oil return filter, and the upper end of the limiting tube is provided with an oil return filter cover plate. A compression spring is installed between the oil return filter cover plate and the oil return filter. The return oil filter tail pipe is a cylindrical structure with one end open, and several micropores are provided on the side wall. The open end of the return oil filter tail pipe is connected to the second return oil filter.

2. The hydraulic oil tank for a mining dump truck as described in claim 1, characterized in that, Multiple oil suction filters and oil suction flanges are provided, and the number of oil suction filters and oil suction flanges is the same, with one oil suction filter installed for each oil suction flange.

3. The hydraulic oil tank for a mining dump truck as described in claim 2, characterized in that, The oil suction flange is provided with an oil pipe connection hole for installing external hydraulic oil pipes.

4. The hydraulic oil tank for a mining dump truck as described in claim 1, characterized in that, Multiple oil return pipes and oil return flanges are provided, and the number of oil return pipes and oil return flanges is the same. One oil return pipe is installed on each oil return flange.

5. A hydraulic oil tank for a mining dump truck as described in claim 4, characterized in that, The return flange is also provided with an oil pipe connection hole for installing external hydraulic oil pipes.

6. A hydraulic oil tank for a mining dump truck as described in claim 1, characterized in that, The top plate of the oil suction chamber is provided with an oil filling port, and an air filter is installed at the oil filling port to release the gas pressure in the oil tank and prevent impurities from entering the oil tank.

7. A hydraulic oil tank for a mining dump truck as described in claim 6, characterized in that, An oil receiving box is provided below the oil filling port and inside the oil suction chamber to prevent hydraulic oil from overflowing through the oil filling port and air filter; several overflow holes are provided on the side wall of the oil receiving box to allow the hydraulic oil in the oil receiving box to flow into the oil suction chamber.

8. The working method of the hydraulic oil tank of a mining dump truck as described in any one of claims 2-7, characterized in that, include: S1. The hydraulic pump in the hydraulic system of the mining dump truck is connected to the suction flange via hydraulic pipeline. The hydraulic oil enters the hydraulic pump from the suction filter and then flows into the working parts from the hydraulic pump. S2. Hydraulic oil returns from the working parts to the hydraulic pipeline, connects to the return oil flange through the hydraulic pipeline, and then is introduced from the bottom of the return oil filter chamber into the first return oil filter through multiple return oil pipes at the bottom of the return oil filter chamber. After the hydraulic oil undergoes primary filtration, it enters the return oil filter chamber and then undergoes secondary filtration through the second return oil filter. It then returns to the return oil chamber through the return oil filter tail pipe. The hydraulic oil returning to the oil tank from the hydraulic system flows from the return oil chamber into the suction chamber through several openings on the partition plate. This process is repeated sequentially.

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