An oil-cooled hydraulic station

Abstract

This utility model discloses an oil-cooled hydraulic station, including an oil tank, a first evaporator and a second evaporator installed inside the oil tank, and an oil manifold block, a compressor, an oil pump, a motor, and a condenser installed outside the oil tank. The first end of the compressor is connected to the condenser through a pipe, the condenser is connected to the second evaporator through a pipe, the second evaporator is connected to the first evaporator through a pipe, and the first evaporator is connected to the second end of the compressor through a pipe. The oil pump is installed at the first end of the motor and is driven by the motor. The oil pump is connected to the oil manifold block through a pipe, and a fan is installed at the second end of the motor to accelerate the airflow on the surface of the condenser fins. This utility model has a reasonable structural design, occupies less space, and has good heat dissipation and cooling effects.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic station technology, specifically to an oil-cooled hydraulic station. Background Technology

[0002] Hydraulic power units are the core power units of industrial equipment. They use an electric motor to drive a hydraulic pump to generate high-pressure oil, which controls actuators (cylinders, motors) to complete mechanical actions such as pushing, pulling, and rotating. Their applications include: 1. Power transmission: replacing mechanical transmission to achieve high-torque, high-precision motion; 2. Automated control: working with valves and sensors to precisely adjust speed and force; 3. Multifunctional adaptability: widely used in machine tools, injection molding machines, construction machinery, and other fields.

[0003] Utility model patent CN207229485U discloses a machine tool hydraulic station. It includes an oil tank, with a motor mounted above the tank. The motor's output shaft is connected to the rotating shaft of a vane pump. The inlet and outlet of the vane pump are both connected to the oil tank. The vane pump has an oil chamber located between the inlet and outlet, and the rotating shaft extends into this chamber. The rotor of the vane pump is eccentrically mounted on the rotating shaft, and the vanes are movably inserted into the vane slots. This machine tool hydraulic station features a compact structure, low energy consumption, low failure rate, and leak-proof design, meeting the power and safety requirements of CNC machine tools.

[0004] Hydraulic oil can be used as a working medium to transmit the pressure energy generated by the hydraulic pump to the actuators (cylinders, motors) to drive mechanical actions; it can also carry away heat through circulation, preventing localized overheating. Existing hydraulic power units experience accelerated oil temperature rise under high-temperature environments or continuous high-load operation; this is due to unreasonable hydraulic power unit design, insufficient heat dissipation area, and poor cooling effect. Utility Model Content

[0005] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides an oil-cooled hydraulic station with a reasonable structural design, small space occupation, and good heat dissipation and cooling effect.

[0006] An oil-cooled hydraulic power unit includes an oil tank, inside which a first evaporator and a second evaporator are installed. Outside the oil tank are an oil manifold, a compressor, an oil pump, a motor, and a condenser. The first end of the compressor is connected to the condenser via a pipe, the condenser is connected to the second evaporator via a pipe, the second evaporator is connected to the first evaporator via a pipe, and the first evaporator is connected to the second end of the compressor via a pipe. The oil pump is installed at the first end of the motor and is driven by the motor. The oil pump is connected to the oil manifold via a pipe. A fan is installed at the second end of the motor to accelerate airflow on the surface of the condenser fins.

[0007] In some embodiments, a condenser is installed at one end of the condenser, and one end of the motor and the fan extend into the condenser. Multiple heat dissipation strips are provided on the outer wall of the motor, and heat dissipation grooves are formed between adjacent heat dissipation strips.

[0008] In some embodiments, heat dissipation strips and heat dissipation grooves are evenly distributed along the axial direction on the outer wall of the motor, the motor is fixed to the top of the oil tank by a base, and a through air guide hole is provided in the base.

[0009] In some embodiments, an oil suction filter is installed inside the oil tank, which is connected to the oil pump via a pipe. A return oil pipe and an inlet oil pipe are also installed on the oil tank.

[0010] In some embodiments, the oil tank includes a tank body and a cover plate, and the oil passage block, compressor, oil pump, motor and condenser are sequentially installed on top of the cover plate.

[0011] In some embodiments, the inner bottom surface of the box is an inclined surface to guide the waste to gather at one end, and a drain pipe is installed on the outer wall at one end of the box, which is located at the end of the inclined surface that is closest to the ground.

[0012] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0013] This oil-cooled hydraulic station has a reasonable structural design and occupies less space; the condenser is cooled by a fan, and the evaporator is used to cool the hydraulic oil; this application has good heat dissipation and cooling effect, and the cooling speed is faster.

[0014] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of this invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a frontal stereoscopic structural diagram of this application;

[0017] Figure 2 This is a rear-view stereoscopic structural diagram of this application;

[0018] Figure 3 This is a top-view three-dimensional structural diagram of this application;

[0019] Figure 4 This is a schematic diagram of the front view structure of this application;

[0020] Figure 5 This is a front-view three-dimensional structural diagram after removing the box body;

[0021] Figure 6 This is a schematic diagram of the main view structure after removing the box body.

[0022] Figure label:

[0023] Fuel tank 1, tank body 100, cover plate 101, inclined surface 102;

[0024] 1. First evaporator 2. Second evaporator 3. Oil manifold 4. Compressor 5. Oil pump

[0025] 6. Motor; 70. Heat sink; 71. Heat dissipation groove.

[0026] 8. Condenser; 9. Pipe; 10. Fan; 11. Air collection duct;

[0027] Base 12, air duct 120;

[0028] Oil suction filter 13, oil return pipe 14, oil inlet pipe 15, drain pipe 16, level gauge 17. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Reference Figures 1-6 An oil-cooled hydraulic power unit includes an oil tank 1, which is a storage container for hydraulic oil and can be equipped with a level gauge 17 to monitor the oil level. A first evaporator 2 and a second evaporator 3 are installed inside the oil tank 1, arranged side-by-side. An oil manifold block 4, a compressor 5, an oil pump 6, a motor 7, and a condenser 8 are installed outside the oil tank 1. The first end of the compressor 5 is connected to the condenser 8 via a pipe 9, and the condenser 8 is connected to the second evaporator 3 via a pipe 9. The second evaporator 3 is connected to the first evaporator 2 via a pipe 9, and the first evaporator 2 is connected to the second end of the compressor 5 via a pipe 9. The oil pump 6 is installed at the first end of the motor 7 and is driven by the motor 7. The oil pump 6 is connected to the oil manifold block 4 via a pipe. A fan 10 is installed at the second end of the motor 7, and the motor 7 drives the fan 10 to rotate. The rotation of the fan 10 generates forced airflow, accelerating the airflow on the surface of the condenser 8 fins, quickly carrying away the heat released by the liquefaction of the refrigerant, and preventing excessively high condensing pressure.

[0034] In use, the motor 7 and the oil pump 6 can be directly coupled by a rigid coupling. The motor 7 drives the oil pump 6 to output high-pressure oil. The outlet of the oil pump 6 can be connected to the oil inlet of the oil circuit block 4 through a rigid pipe, and then distributed to each actuator. The oil circuit block 4 can collect the high-temperature return oil from the actuators and return it to the oil tank 1 after passing through the oil filter. After entering the oil tank 1, the high-temperature return oil is cooled by the first evaporator 2 and the second evaporator 3. The compressor 5 compresses the gaseous refrigerant and outputs high-temperature and high-pressure gas to the condenser 8. The condenser 8 is cooled by the fan 10. After the refrigerant is liquefied, it is throttled by the expansion valve. The liquid refrigerant absorbs heat and vaporizes in the evaporator, cooling the hydraulic oil in the oil tank 1. A temperature detector can be installed in the oil tank 1 to monitor the temperature of the hydraulic oil in real time. When the temperature reaches the preset value (such as 28 to 31 degrees Celsius), the compressor is started to cool the hydraulic oil. This oil-cooled hydraulic station has a reasonable structural design and occupies less space; the condenser 8 is cooled by air through the fan 10, and the evaporator is used to cool the hydraulic oil; this application has good heat dissipation and cooling effect, and the cooling speed is faster.

[0035] In some embodiments, a collector duct 11 is installed at one end of the condenser 8. The collector duct 11 is a cylindrical body that runs through the middle. One end of the motor 7 and the fan 10 extend into the collector duct 11. Multiple heat dissipation strips 70 are provided on the outer wall of the motor 7. A heat dissipation groove 71 is formed between two adjacent heat dissipation strips 70. The heat dissipation strips 70 and the heat dissipation groove 71 are used to increase the heat dissipation area and improve the air flow speed.

[0036] In some embodiments, the heat dissipation strips 70 and heat dissipation grooves 71 are evenly distributed along the axial direction on the outer wall of the motor 7, making the heat dissipation more uniform; the motor 7 is fixed to the top of the oil tank 1 by a U-shaped base 12, and a through air guide hole 120 is provided in the base 12 to increase the heat dissipation area and facilitate air flow.

[0037] In some embodiments, an oil suction filter 13 is installed in the oil tank 1, which is connected to the oil pump 6 through the pipe 9. The oil suction filter 13 is used to filter impurities in the hydraulic oil. A return oil pipe 14 and an inlet oil pipe 15 are also installed on the oil tank 1. The return oil pipe 14 can lead the low-pressure oil after the hydraulic actuator (such as the oil cylinder or hydraulic motor) has done work back to the oil tank 1 to complete the circulation. The inlet oil pipe 15 can be used to inject hydraulic oil into the oil tank 1.

[0038] In some embodiments, the oil tank 1 includes a housing 100 and a cover plate 101. The oil manifold block 4, compressor 5, oil pump 6, motor 7, and condenser 8 are sequentially installed on top of the cover plate 101, resulting in a convenient and compact layout that reduces space occupation. The oil manifold block 4 is located at the first end, and the condenser 8 is located at the second end. The oil manifold block 4, also known as a hydraulic valve block or integrated block, is the core control device of the hydraulic system. It integrates hydraulic components such as directional valves, pressure valves, and flow valves, replacing scattered pipe connections, saving space and reducing leakage risks. It can achieve efficient oil distribution through precision-machined cross-channels (such as pilot oil circuits and main oil circuits), reducing pressure loss. Its modular design allows for individual disassembly and maintenance of the valve block without affecting other components, facilitating maintenance.

[0039] In some embodiments, the inner bottom surface of the box 100 is an inclined surface 102, which is used to guide the waste to gather at one end. A drain pipe 16 is installed on the outer wall of one end of the box 100, which is located at the end of the inclined surface 102 that is closest to the ground.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oil-cooled hydraulic power unit, comprising an oil tank, characterized in that: The oil tank contains a first evaporator and a second evaporator. Outside the oil tank are an oil manifold block, a compressor, an oil pump, a motor, and a condenser. The first end of the compressor is connected to the condenser via a pipe, the condenser is connected to the second evaporator via a pipe, the second evaporator is connected to the first evaporator via a pipe, and the first evaporator is connected to the second end of the compressor via a pipe. The oil pump is installed at the first end of the motor and is driven by the motor. The oil pump is connected to the oil manifold block via a pipe. A fan is installed at the second end of the motor to accelerate the airflow on the surface of the condenser fins.

2. The oil-cooled hydraulic station as described in claim 1, characterized in that: A condenser is installed at one end of the condenser, and one end of the motor and the fan extend into the condenser. Multiple heat dissipation strips are provided on the outer wall of the motor, and heat dissipation grooves are formed between adjacent heat dissipation strips.

3. The oil-cooled hydraulic station as described in claim 2, characterized in that: Heat dissipation bars and grooves are evenly distributed along the axial direction on the outer wall of the motor. The motor is fixed to the top of the oil tank by a base, and a through air guide hole is opened in the base.

4. The oil-cooled hydraulic power unit as described in any one of claims 1 to 3, characterized in that: An oil suction filter is installed inside the oil tank, which is connected to the oil pump through a pipe. A return oil pipe and an inlet oil pipe are also installed on the oil tank.

5. The oil-cooled hydraulic station as described in claim 4, characterized in that: The oil tank consists of a tank body and a cover plate. The oil passage block, compressor, oil pump, motor, and condenser are installed sequentially on top of the cover plate.

6. The oil-cooled hydraulic station as described in claim 5, characterized in that: The inner bottom surface of the box is inclined to guide the waste to one end. A drain pipe is installed on the outer wall of one end of the box, which is located at the end of the inclined surface that is closest to the ground.

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