A hydraulic system

Abstract

The utility model discloses a kind of hydraulic systems, including oil tank, hydraulic pump and execution control unit, oil tank oil outlet and execution control unit are connected by oil conveying pipeline, hydraulic pump is set on oil conveying pipeline, to pump the hydraulic oil in oil tank to execution control unit;Execution control unit is connected by oil return pipeline with oil tank oil return port, it is convenient for hydraulic oil backflow to oil tank;It further includes filter unit and heat dissipation unit, filter unit is used to filter to hydraulic oil, to remove the impurity in hydraulic oil;Heat dissipation unit is used to cool to hydraulic oil, to reduce the temperature of hydraulic oil;Filter unit is set on oil return pipeline, the heat dissipation unit is set on the oil return pipeline between filter unit and oil tank;Or, the heat dissipation unit is set on oil return pipeline, the filter unit is set on the oil return pipeline between heat dissipation unit and oil tank.The utility model can efficiently reduce hydraulic oil temperature and remove the impurity in hydraulic oil, guarantee the stability and reliability of hydraulic system.

Description

Technical Field

[0001] This utility model pertains to vehicle hydraulic systems, specifically relating to a hydraulic system capable of cooling and removing impurities from hydraulic oil. Background Technology

[0002] Hydraulic systems are the core power mechanisms of heavy vehicles such as garbage trucks, freight trucks, and construction machinery. They achieve efficient power transmission and precise control through hydraulic oil, enabling complex actions such as lifting, compression, and steering. A typical hydraulic system includes an oil tank, a hydraulic pump, and an execution control unit. The oil tank stores hydraulic oil, and its outlet is connected to the execution control unit via an oil supply line. The hydraulic pump is located on the oil supply line to pump hydraulic oil from the tank to the execution control unit. The execution control unit is connected to the oil tank's return port via a return line, facilitating the return of hydraulic oil to the tank. The execution control unit includes hydraulic cylinders, motors, and various valves. The performance of the hydraulic oil directly affects the reliability, efficiency, and lifespan of the hydraulic system. Furthermore, hydraulic oil also plays a role in lubrication, cooling, and sealing.

[0003] However, in actual operation, prolonged high-intensity workloads often lead to excessively high hydraulic oil temperatures. Excessively high hydraulic oil temperatures not only reduce the viscosity of the hydraulic oil, affecting its lubrication and sealing performance, but may also lead to a decrease in the working efficiency of the hydraulic system, or even cause equipment failure and shorten the service life of hydraulic components.

[0004] Furthermore, during vehicle operation, impurities such as iron filings and dust inevitably accumulate in the hydraulic oil. If these impurities are not removed promptly, they will circulate with the hydraulic oil within the pipelines, causing wear on the inner walls of precision hydraulic components such as hydraulic pumps, valves, and cylinders, exacerbating equipment damage, and further affecting the stability and reliability of the hydraulic system.

[0005] Therefore, how to efficiently reduce the temperature of hydraulic oil and remove impurities from the hydraulic oil to ensure the stability and reliability of the hydraulic system is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a hydraulic system that can efficiently reduce the temperature of hydraulic oil and remove impurities in the hydraulic oil, thereby ensuring the stability and reliability of the hydraulic system.

[0007] The technical solution of this utility model is implemented as follows: A hydraulic system includes an oil tank, a hydraulic pump, and an execution control unit. The oil tank outlet and the execution control unit are connected via an oil supply pipeline. The hydraulic pump is installed on the oil supply pipeline to pump hydraulic oil from the oil tank to the execution control unit. The execution control unit is connected to the oil tank return port via a return oil pipeline to facilitate the return of hydraulic oil to the oil tank.

[0008] It also includes a filtration unit and a heat dissipation unit. The filtration unit is used to filter the hydraulic oil to remove impurities from the hydraulic oil; the heat dissipation unit is used to cool the hydraulic oil to reduce its temperature.

[0009] The filter unit is installed on the oil return line, and the heat dissipation unit is installed on the oil return line between the filter unit and the oil tank.

[0010] or The heat dissipation unit is installed on the oil return line, and the filter unit is installed on the oil return line between the heat dissipation unit and the oil tank.

[0011] Furthermore, the filter unit is installed on the oil return line, and the heat dissipation unit is installed on the oil return line between the filter unit and the oil tank.

[0012] Furthermore, the filtering unit includes a first filter and a second filter, which are connected in series, with the first filter being close to the execution control unit, and the filter aperture of the first filter being larger than that of the second filter.

[0013] Furthermore, the first filter and the second filter are fixedly mounted on the vehicle frame.

[0014] Furthermore, the heat dissipation unit is an air cooler.

[0015] Furthermore, the air cooler is fixedly mounted on the vehicle frame by a support frame and is located inside the vehicle frame.

[0016] Furthermore, the support frame includes a horizontally arranged support plate and a vertically arranged connecting plate on the edge of the support plate, the connecting plate being fixedly connected to the vehicle frame; the support plate is provided with a plurality of bolt holes corresponding one-to-one with the air cooler mounting holes, so as to facilitate the air cooler being fixedly installed on the support plate by bolts.

[0017] Furthermore, several reinforcing ribs are provided between the support plate and the connecting plate to improve the strength of the support frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model efficiently reduces the temperature of hydraulic oil and removes impurities from it by installing a filter unit and a heat dissipation unit on the return oil line of the hydraulic system. Specifically, the filter unit can promptly remove impurities such as iron filings from the hydraulic oil, preventing impurities from causing wear on precision hydraulic components such as hydraulic pumps, valves, and cylinders. This reduces internal leakage in the system, stabilizes pressure, and prevents blockage of pipelines and valve ports, thereby significantly reducing the risk of hydraulic system failure.

[0019] At the same time, the heat dissipation unit can effectively reduce the temperature of the hydraulic oil, preventing the hydraulic oil from becoming less viscous and reducing its lubrication and sealing performance due to excessive temperature, thereby ensuring the working efficiency of the hydraulic system and extending the service life of hydraulic components.

[0020] Thus, this invention can efficiently reduce the temperature of hydraulic oil and remove impurities from the hydraulic oil, thereby improving the stability, reliability, and service life of the hydraulic system.

[0021] 2. The filtration unit of this utility model includes a first filter and a second filter arranged in series. During filtration, the hydraulic oil returning from the control unit passes through the first and second filters sequentially. The first filter removes larger particles, preventing them from directly entering the second filter and causing blockage or premature failure. The second filter further removes smaller particles. This efficiently removes impurities from the hydraulic oil, avoiding the use of a single filter which can lead to poor filtration or blockage, affecting the stable operation of the hydraulic system. Attached Figure Description

[0022] Figure 1 - A structural schematic diagram of Embodiment 1 of this utility model.

[0023] Figure 2 - A schematic diagram of the structure of Embodiment 2 of this utility model.

[0024] Wherein: 1-oil tank; 2-hydraulic pump; 3-actuator control unit; 4-first filter; 5-second filter; 6-air cooler. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In actual operation, heavy vehicles such as garbage trucks and construction machinery often experience excessively high hydraulic oil temperatures due to prolonged high-intensity workloads. Excessive hydraulic oil temperature not only reduces its viscosity, affecting its lubrication and sealing performance, but can also lead to decreased hydraulic system efficiency, equipment failure, and shortened lifespan of hydraulic components. Furthermore, during vehicle operation, impurities such as iron filings and dust inevitably accumulate in the hydraulic oil. If these impurities are not removed promptly, they will circulate with the hydraulic oil within the pipelines, causing wear on the inner walls of precision hydraulic components such as hydraulic pumps, valves, and cylinders, accelerating equipment damage, and further impacting the stability and reliability of the hydraulic system.

[0028] Based on this, the present invention provides a hydraulic system, see [link to relevant documentation]. Figure 1 and Figure 2The system includes an oil tank 1, a hydraulic pump 2, and an execution control unit 3. The oil tank 1 stores hydraulic oil and has an oil filler port, an oil outlet, and a return port. The oil filler port is used to add hydraulic oil to the oil tank 1. The oil outlet of the oil tank 1 and the execution control unit 3 are connected via an oil supply pipeline. The hydraulic pump 2 is located on the oil supply pipeline to pump the hydraulic oil from the oil tank 1 to the execution control unit 3. The execution control unit 3 is connected to the return port of the oil tank 1 via a return pipeline, facilitating the return of hydraulic oil to the oil tank 1. The execution control unit is the core component of the hydraulic system, responsible for receiving control signals and driving the actuator to complete specific actions. After completing the work, the hydraulic oil returns to the oil tank through the return pipeline, completing a complete hydraulic cycle. Specifically, the execution control unit includes actuators and control elements. The actuators convert the pressure energy of the hydraulic oil into mechanical energy, such as hydraulic cylinders and hydraulic motors. The control elements control and regulate the pressure, flow rate, and flow direction of the hydraulic oil in the hydraulic system, such as directional control valves, flow control valves, and pressure control valves.

[0029] To address the issues of excessively high hydraulic oil temperature and contamination, this hydraulic system also includes a filtration unit and a heat dissipation unit. The filtration unit filters the hydraulic oil to remove impurities and ensure its cleanliness. The heat dissipation unit cools the hydraulic oil to maintain its temperature within a suitable operating range.

[0030] There are two optional configurations for the filtering unit and the heat dissipation unit. In implementation method one ( Figure 1 The filter unit is located on the return oil line, while the cooling unit is located on the return oil line between the filter unit and oil tank 1. This means that as the hydraulic oil flows back from the actuator control unit to oil tank 1, it first passes through the filter unit to remove impurities, then flows through the cooling unit for cooling, and finally returns to the oil tank. This layout ensures that the hydraulic oil entering the cooling unit is pre-purified, helping to protect the cooling unit from clogging by impurities, while also ensuring that the hydraulic oil returning to the oil tank is both clean and cold.

[0031] In implementation method two ( Figure 2 The cooling unit is located on the return oil line, while the filter unit is located on the return oil line between the cooling unit and the oil tank 1. In this way, the hydraulic oil first passes through the cooling unit for cooling during its return flow, then flows through the filter unit for impurity removal, and finally returns to the oil tank. This prioritizes cooling of the high-temperature hydraulic oil, helping to quickly reduce the overall temperature of the hydraulic system before fine filtration.

[0032] In practical applications, the specific arrangement of the filter unit and the heat dissipation unit on the return pipeline can affect the filtration and heat dissipation effects of the hydraulic oil, thereby affecting the operating efficiency of the hydraulic system and the service life of the hydraulic oil. Research has shown that when the filter unit is located on the return pipeline and the heat dissipation unit is located on the return pipeline between the filter unit and the oil tank 1, meaning the hydraulic oil enters the heat dissipation unit only after filtration, the cleanliness of the hydraulic oil entering the heat dissipation unit can be guaranteed. This prevents impurities from accumulating inside the heat dissipation unit, affecting heat dissipation efficiency, and thus ensuring the stable operation of the hydraulic system and the service life of the hydraulic oil.

[0033] In a specific implementation, the filtering unit includes a first filter 4 and a second filter 5, which are connected in series. The first filter 4 is close to the execution control unit 3, and the filter holes of the first filter 4 are larger than those of the second filter 5.

[0034] Because the impurities in hydraulic oil vary in size, the hydraulic oil returning from the control unit is filtered sequentially through a first filter and a second filter. The first filter removes larger impurities, preventing them from directly entering the second filter and causing blockage or premature failure. The second filter removes smaller impurities. This efficient removal of impurities from the hydraulic oil avoids the problems associated with using a single filter, which can lead to poor filtration or blockage and affect the stable operation of the hydraulic system. In practice, the pore size of the first filter can be set to 100 micrometers, and the pore size of the second filter can be set to 10 micrometers. In practice, the first filter 4 and the second filter 5 are fixedly mounted on the vehicle frame. The vehicle frame is the basic structure of the vehicle; fixing the first and second filters to the frame utilizes the frame's stability to ensure the stability of the first and second filters. In application, the first and second filters can be fixed to the frame using bolts or welding, but for easier maintenance and replacement, bolts are preferred.

[0035] In specific implementation, the heat dissipation unit is an air cooler 6. This air cooler is a device that uses a fan to guide airflow over a radiator to achieve cooling. The air cooler typically consists of a fan, a delivery pipe, and heat sinks mounted on the delivery pipe. The delivery pipe is serpentine in design and used to deliver hydraulic oil. The heat sinks increase the heat dissipation area, and the fan provides airflow. Thus, by forcing airflow over the heat sinks, the fan carries away the heat from the hydraulic oil, thereby lowering its temperature. During use, the air cooler can be manually switched on as needed to force cooling of the hydraulic oil. A temperature sensor can also be installed on the air cooler to detect the hydraulic oil temperature; when the hydraulic oil temperature exceeds a set threshold, the air cooler will automatically turn on.

[0036] In practice, the air cooler 6 is fixedly mounted on the vehicle frame via a support frame and is located inside the vehicle frame. This placement of the air cooler inside the vehicle frame effectively utilizes the internal space, while the cargo box on the frame, such as the garbage bin of a garbage truck, protects it from direct impact from rain and other external environmental factors, thereby improving its service life and reliability.

[0037] In practical implementation, the support frame includes a horizontally arranged support plate and a vertically arranged connecting plate along the edge of the support plate, the connecting plate being fixedly connected to the vehicle frame. The support plate has several bolt holes corresponding one-to-one with the air cooler mounting holes, facilitating the fixing of the air cooler to the support plate with bolts. Simultaneously, several reinforcing ribs are provided between the support plate and the connecting plate to improve the strength of the support frame. This support frame can be made of high-strength metal materials to ensure its load-bearing capacity and stability.

[0038] Finally, it should be noted that the above embodiments of this utility model are merely examples for illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations and modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A hydraulic system comprising an oil tank, a hydraulic pump, and an execution control unit, wherein the oil tank outlet and the execution control unit are connected via an oil supply pipeline, the hydraulic pump is disposed on the oil supply pipeline to pump hydraulic oil from the oil tank to the execution control unit; the execution control unit is connected to the oil tank return port via a return oil pipeline to facilitate the return of hydraulic oil to the oil tank; characterized in that: It also includes a filtration unit and a heat dissipation unit. The filtration unit is used to filter the hydraulic oil to remove impurities from the hydraulic oil; the heat dissipation unit is used to cool the hydraulic oil to reduce its temperature. The filter unit is installed on the oil return line, and the heat dissipation unit is installed on the oil return line between the filter unit and the oil tank. or The heat dissipation unit is installed on the oil return line, and the filter unit is installed on the oil return line between the heat dissipation unit and the oil tank.

2. A hydraulic system according to claim 1, characterized in that, The filter unit is installed on the oil return line, and the heat dissipation unit is installed on the oil return line between the filter unit and the oil tank.

3. A hydraulic system according to claim 1 or 2, characterized in that, The filtering unit includes a first filter and a second filter, which are connected in series. The first filter is close to the execution control unit, and the filter holes of the first filter are larger than those of the second filter.

4. A hydraulic system according to claim 3, characterized in that, The first filter and the second filter are fixedly mounted on the vehicle frame.

5. A hydraulic system according to claim 1 or 2, characterized in that, The heat dissipation unit is an air cooler.

6. A hydraulic system according to claim 5, characterized in that, The air cooler is fixedly mounted on the vehicle frame by a support frame and is located inside the vehicle frame.

7. A hydraulic system according to claim 6, characterized in that, The support frame includes a horizontally arranged support plate and a vertically arranged connecting plate on the edge of the support plate. The connecting plate is fixedly connected to the vehicle frame. The support plate is provided with a number of bolt holes that correspond one-to-one with the mounting holes of the air cooler, so that the air cooler can be fixedly installed on the support plate by bolts.

8. A hydraulic system according to claim 7, characterized in that, Several reinforcing ribs are provided between the support plate and the connecting plate to improve the strength of the support frame.

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