Hydraulic pump housing with liquid cooling channel

Abstract

The utility model relates to hydraulic pump technical field discloses a kind of hydraulic pump shell with liquid cooling runner, including pump body, by upper shell and lower shell are made of, adopt high-strength alloy material, with good mechanical properties and high-pressure resistant characteristics, by high-strength bolt fastening connection, combination surface is equipped with sealing washer;Hydraulic pump rotor, it is set in pump body, for input mechanical energy;Symmetrically distributed in the oil suction and discharge runner of pump body interior, present specific bending intercommunicating structure, for the suction and discharge of hydraulic oil;Liquid cooling runner, including liquid cooling runner A, liquid cooling runner B, liquid cooling runner C, liquid cooling runner D, surround oil suction and discharge runner distribution, for cooling liquid flow heat dissipation.The utility model in, by symmetrical closed loop liquid cooling runner design, realize the accurate cooling of pump body core heating area, effectively control local temperature, avoid the friction pair oil film thinning or failure problem caused by the sharp drop of hydraulic oil due to high temperature viscosity, significantly reduce component wear.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic pump technical field especially relates to a hydraulic pump shell with liquid cooling runner. BACKGROUND

[0002] Hydraulic pump is widely used in industry, agriculture, shipbuilding, metallurgy, aerospace and many other fields of machines and equipment, its core function is to provide sufficient hydraulic energy for system and actuator, from the working principle, hydraulic pump belongs to volumetric pump.

[0003] As the core component of equipment, hydraulic pump is widely used in industry and engineering machinery. It can convert the mechanical energy input by motor or prime mover into hydraulic energy and output, and is the key energy conversion equipment at the front end. The performance of hydraulic pump directly determines the running effect of the whole fluid control system. In modern hydraulic systems, pump control systems composed of control motors and hydraulic pumps are concerned for their good controllability and significant energy-saving effect. Among them, the core components of compact hydraulic motor pump groups that can work at high speed and high pressure are more and more valued by the industry. However, this puts higher requirements on the working speed, working pressure and efficiency of hydraulic pumps.

[0004] After a large number of tests and actual applications, it is found that when the hydraulic pump operates at high speed and high pressure, the heat power generated will quickly rise, and the local temperature of the hydraulic pump will exceed 65 degrees Celsius during long-term operation. The viscosity of hydraulic oil will quickly decrease in a high-temperature environment, which will cause the oil film on the surface of the friction pair to become thin, or even almost no oil film is formed. At the same time, under the influence of high temperature, the mechanical properties of the metal material used to manufacture the hydraulic pump will decrease, and the deformation will increase. These factors together cause the wear of the hydraulic pump to increase sharply, the noise to spread, and the efficiency to decrease rapidly, thereby accelerating the damage of the hydraulic pump and significantly reducing its service life. SUMMARY

[0005] In order to make up for the above shortcomings, the utility model provides a hydraulic pump shell with liquid cooling runner, which aims to improve the problem that the existing hydraulic pump will cause the heat power to rise rapidly during long-term operation, thereby causing the viscosity of hydraulic oil to decrease sharply, making the oil film on the surface of the friction pair thin or even disappear. At the same time, high temperature will cause the mechanical properties of the metal material used to manufacture the hydraulic pump to decrease and the deformation to increase.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic pump housing with liquid-cooled flow channels, including a pump body composed of an upper housing and a lower housing, made of high-strength alloy material, possessing good mechanical properties and high-pressure resistance, fastened together by high-strength bolts, with sealing gaskets on the mating surfaces; a hydraulic pump rotor, passing through the pump body, used for inputting mechanical energy; symmetrically distributed suction and discharge oil channels inside the pump body, with a specific curved and connected structure, used for the suction and discharge of hydraulic oil; liquid-cooled flow channels, including liquid-cooled flow channels A, B, C, and D, distributed around the suction and discharge oil channels, used for coolant circulation and heat dissipation, independent of the suction and discharge oil channels; upper port one and upper port two, which are coolant outlets of the liquid-cooled flow channels, with a stepped cylindrical hole structure, adapted to standard hydraulic connectors; lower port one and lower port two, which are coolant inlets of the liquid-cooled flow channels, with a stepped cylindrical hole structure, adapted to standard hydraulic connectors; and a flow guiding mechanism for guiding the coolant in the liquid-cooled flow channels.

[0007] Furthermore, the liquid cooling channel has a connecting structure at corresponding positions on the upper and lower housings of the pump body, which is a cylindrical through hole to ensure smooth flow of coolant.

[0008] Furthermore, the upper port one and upper port two of the suction and discharge oil flow channels are distributed perpendicularly to the pump body mounting surface, which facilitates pipeline layout.

[0009] Furthermore, the inner surface of the liquid cooling channel is polished to reduce the flow resistance of the coolant and ensure heat dissipation efficiency. The cross-sectional area of ​​the liquid cooling channel is a variable cross-section structure that first gradually decreases and then gradually increases along the flow direction of the coolant. According to Bernoulli's equation, this ensures that the coolant flow rate and pressure are matched, thereby enhancing the uniformity of heat dissipation.

[0010] Furthermore, the distance between the suction and discharge oil flow channels and the liquid cooling flow channels inside the pump body is 3mm to 5mm. Finite element analysis verifies that the structural stress is less than the allowable stress of the material under high-speed and high-pressure conditions, ensuring a balance between heat dissipation and pump body structural strength.

[0011] Furthermore, the flow guiding mechanism includes a flow guiding pipe, which is installed inside the liquid cooling channel. A flow guiding plate is installed inside the flow guiding pipe, and a fixed frame is fixedly connected inside the flow guiding pipe. A stirring blade is rotatably connected to the outer wall of the fixed frame.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, the symmetrical closed-loop liquid cooling channel design enables precise cooling of the core heat-generating area of ​​the pump body, effectively controls the local temperature, avoids the problem of thin or failed oil film of the friction pair caused by the rapid decrease in viscosity of hydraulic oil at high temperature, and significantly reduces component wear.

[0014] 2. In this utility model, the combination of high-strength alloy material and sealing and fastening structure, along with the scientific design of the flow channel spacing, enables the pump body to maintain structural stability under high-speed (≥3000 rpm) and high-pressure conditions, and significantly improves its deformation resistance and high-pressure resistance.

[0015] 3. In this utility model, the low-resistance design and uniform heat dissipation characteristics of the liquid cooling channel reduce the degradation of the mechanical properties of metal materials and friction loss caused by high temperature, thereby increasing the efficiency of the hydraulic pump by 5% to 10%, reducing noise by 3-5 decibels, and extending the service life by more than 30%.

[0016] 4. In this utility model, the symmetrical flow channel layout and standardized port design are compatible with general industrial hydraulic pipelines and cooling systems. At the same time, the detachable shell connection structure facilitates later maintenance and flow channel cleaning, improving the practical application convenience of the equipment.

[0017] 5. In this utility model, a guide pipe is installed inside the liquid cooling channel. When the coolant enters the liquid cooling channel, it will first enter the guide pipe. The guide plate inside the guide pipe controls the direction of the coolant, causing the coolant to accelerate and rotate. The accelerated coolant will impact the agitator blades, causing the agitator blades to rotate, thereby further agitating the coolant. This allows the coolant inside the liquid cooling channel to have more sufficient contact with the inner wall of the liquid cooling channel, thereby improving its cooling efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the reverse assembly of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the internal flow channel structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model;

[0021] Figure 4 This is an exploded structural diagram of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the liquid cooling channel C structure of a hydraulic pump housing with a liquid cooling channel proposed in this utility model;

[0023] Figure 6 This is a schematic diagram of the suction and discharge oil flow channel structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model;

[0024] Figure 7This utility model provides a full sectional view of the internal flow channels and component assembly of a hydraulic pump housing with a liquid-cooled flow channel.

[0025] Figure 8 This is a reverse full sectional view of the internal structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model.

[0026] Figure 9 This is a schematic diagram of the guide plate structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model;

[0027] Figure 10 This is a schematic diagram of the agitator blade structure of a hydraulic pump housing with a liquid-cooled flow channel proposed in this utility model.

[0028] Legend:

[0029] 1. Upper housing; 2. Lower housing; 3. Hydraulic pump rotor; 4. Upper port one; 5. Upper port two; 6. Liquid cooling channel A; 7. Lower port one; 8. Lower port two; 9. Liquid cooling channel B; 10. Suction and discharge oil channels; 11. Liquid cooling channel C; 12. Liquid cooling channel D; 13. Guide pipe; 14. Guide plate; 15. Agitator blades; 16. Fixing frame. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 - Figure 8 This utility model provides an embodiment of a hydraulic pump housing with liquid-cooled flow channels, comprising: a pump body, consisting of an upper housing 1 and a lower housing 2, made of high-strength alloy material, possessing good mechanical properties and high-pressure resistance, fastened together by high-strength bolts, with sealing gaskets on the mating surfaces; a hydraulic pump rotor 3, passing through the pump body, used for inputting mechanical energy; symmetrically distributed suction and discharge oil flow channels 10 inside the pump body, having a specific curved and connected structure, used for the suction and discharge of hydraulic oil; liquid-cooled flow channels, including liquid-cooled flow channels A6, B9, C11, and D12, distributed around the suction and discharge oil flow channels 10, used for coolant circulation and heat dissipation, independent of the suction and discharge oil flow channels 10; upper port 1 4 and upper port 2 5, which are coolant outlets of the liquid-cooled flow channels, having a stepped cylindrical hole structure, adapted to standard hydraulic connectors; lower port 1 7 and lower port 2 8, which are coolant inlets of the liquid-cooled flow channels, having a stepped cylindrical hole structure, adapted to standard hydraulic connectors;

[0032] Specifically, when the hydraulic pump is running, the hydraulic pump rotor 3, as the core power transmission component, efficiently converts the mechanical energy input from the electric motor or prime mover into hydraulic energy, driving the hydraulic oil to complete the periodic intake and discharge action in the symmetrically distributed intake and discharge channels 10 inside the pump body, which consists of the upper housing 1 and the lower housing 2. This symmetrically distributed channel design not only achieves a stable conversion of mechanical energy into hydraulic energy, but also reduces the turbulent loss of hydraulic oil flow through structural symmetry, reduces local energy waste caused by uneven flow field, and indirectly improves energy conversion efficiency.

[0033] To address the significant heat generated by the high-frequency relative motion of friction pairs (such as the piston and cylinder, rotor and housing mating surfaces) under high-speed and high-pressure conditions, this housing utilizes an independent liquid cooling system for precise heat dissipation. Low-temperature coolant enters a closed-loop flow channel composed of liquid cooling channels A6, B9, C11, and D12 through lower port 7 and lower port 8, and exits through upper port 4 and upper port 5. The liquid cooling channels are symmetrically distributed around the suction and discharge channels 10, and precisely connected at corresponding positions on the upper housing 1 and lower housing 2 via cylindrical through-holes, forming a dead-angle-free circulation path to ensure smooth coolant flow. The reverse flow design extends the coolant's residence time within the pump body, and combined with the channel layout, ensures more thorough heat exchange, effectively solving the problem of uneven heat dissipation in traditional housings and laying the foundation for controlling pump body temperature.

[0034] When the coolant flows within the liquid-cooled flow channel, it comes into full contact with the pump housing and the surface of the suction and discharge oil flow channel 10. Through heat conduction and convection, it efficiently absorbs the heat from the friction pair. The smooth surface inside the flow channel, after polishing, significantly reduces flow resistance and reduces energy loss during coolant circulation. The variable cross-section structure, which "gradually shrinks and then gradually expands" along the flow direction, optimizes the flow velocity and pressure distribution based on fluid mechanics principles. This allows the coolant to uniformly flush the heat-generating areas in each section of the flow channel, preventing localized high-temperature accumulation. This design ensures that the coolant, after absorbing heat, can stably carry away most of the heat, keeping the local temperature of the pump body below 65°C. This prevents the hydraulic oil from rapidly decreasing in viscosity due to high temperatures, ensuring the formation of a stable oil film on the friction pair surface, significantly reducing component wear, and extending the service life of core components.

[0035] In the internal structure of the liquid cooling channel, a guide pipe 13 is designed and installed. When the coolant begins to be injected into the internal space of the liquid cooling channel, it first flows directly into this guide pipe 13. Inside the guide pipe 13, multiple spiral-designed guide plates 14 are provided. The main function of the guide plates 14 is to control the flow direction of the coolant and ensure that the coolant is guided along a preset path. During this process, the coolant not only accelerates significantly, but also rotates under the action of the guide plates 14. This rotational motion causes the accelerated coolant to impact the agitator blades 15 with greater kinetic energy. After being impacted by the coolant, the agitator blades 15 begin to rotate. This rotation not only increases the fluidity of the coolant, but also further effectively agitates the coolant. Through this design, the coolant inside the liquid cooling channel can achieve more full and uniform contact with the inner wall of the liquid cooling channel. This full contact greatly improves the heat exchange efficiency between the coolant and the inner wall, thereby significantly improving the cooling efficiency of the entire liquid cooling system and ensuring that the equipment can maintain stable temperature control even when operating under high load.

[0036] The pump body is made of high-strength alloy material, possessing excellent mechanical properties and high-pressure resistance. The upper housing 1 and lower housing 2 are fastened together with high-strength bolts, and sealing gaskets are installed on the mating surfaces. This ensures structural sealing under high-pressure conditions and improves the overall deformation resistance. At the same time, the suction and discharge oil channels 10 and the liquid cooling channels maintain a scientific distance of 3mm to 5mm. It has been verified that this distance ensures heat dissipation efficiency while keeping the structural stress of the pump body always less than the allowable stress of the material, achieving a precise balance between heat dissipation performance and structural strength. This balanced design allows the pump body to maintain structural stability under high-speed (≥3000 rpm) and high-pressure conditions. Its deformation resistance and high-pressure resistance are significantly better than traditional housings, reducing the risk of failure due to structural failure and further ensuring the long-term stable operation of the hydraulic pump.

[0037] Working principle: When the hydraulic pump is running, the hydraulic pump rotor, as the core power component 3, converts the input mechanical energy into hydraulic energy, driving the hydraulic oil to complete the suction and discharge actions in the symmetrically distributed suction and discharge channels 10 inside the pump body, realizing the efficient conversion of mechanical energy into hydraulic energy. To solve the problem of a large amount of heat generated by the friction pair under high-speed and high-pressure conditions, coolant enters the pump body through the lower port 7 and the lower port 8, flowing into the independent cooling channel composed of liquid cooling channels A6, B9, C11, and D12. A closed-loop flow channel is constructed, which surrounds the suction and discharge oil channel 10 and is connected to the upper housing 1 and lower housing 2 by cylindrical through holes at corresponding positions to ensure smooth coolant flow. During the flow of the coolant within the liquid-cooled flow channel, it fully contacts and exchanges heat with the pump body and the suction and discharge oil channel 10, absorbing the heat generated by the pump operation. The coolant is then discharged from the pump body through upper port 4 and upper port 5, carrying away most of the heat to control the pump body temperature. The coolant enters from upper port 4 and upper port 5 and exits from lower port 7 and lower port 2. The discharge port 28 allows the coolant to remain in the pump body for a longer time, thus facilitating heat exchange. A guide pipe 13 is installed inside the liquid-cooled flow channel. When the coolant enters the flow channel, it first enters the guide pipe 13, where the guide plate 14 inside the guide pipe 13 controls the coolant's direction, accelerating and rotating it. The accelerated coolant impacts the agitator blades 15, causing them to rotate and further agitate the coolant. This ensures more thorough contact between the coolant and the inner wall of the liquid-cooled flow channel. The pump body is made of high-strength alloy material. The upper housing 1 and lower housing 2 are fastened together with high-strength bolts, and sealing gaskets are installed at the joint surface to ensure high-pressure resistance. The interior of the liquid-cooled flow channel is polished to reduce flow resistance. Its cross-sectional area gradually decreases and then gradually increases along the flow direction. Simultaneously, the suction and discharge oil flow channels 10 maintain a 3mm-5mm distance from the liquid-cooled flow channel, enhancing heat dissipation uniformity while maintaining structural strength, ensuring stable operation of the hydraulic pump under high-speed and high-pressure conditions.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic pump housing with a liquid-cooled flow channel, characterized in that, include: The pump body consists of an upper shell (1) and a lower shell (2), made of high-strength alloy material, with good mechanical properties and high pressure resistance. It is fastened by high-strength bolts, and a sealing gasket is provided on the mating surface. The hydraulic pump rotor (3) is installed in the pump body and is used to input mechanical energy; The suction and discharge oil channels (10) are symmetrically distributed inside the pump body and have a specific curved connection structure for the suction and discharge of hydraulic oil. The liquid cooling channels, including liquid cooling channels A (6), B (9), C (11), and D (12), are distributed around the suction and discharge oil channels (10) and are used for the flow and heat dissipation of the coolant. They are independent of the suction and discharge oil channels (10). Upper port one (4) and upper port two (5) are the coolant outlets of the liquid cooling channel, which have a stepped cylindrical hole structure and are compatible with standard hydraulic connectors. The lower port 1 (7) and lower port 2 (8) are the coolant inlets of the liquid cooling channel, and have a stepped cylindrical hole structure to fit standard hydraulic connectors. A flow guiding mechanism is used to guide the flow of coolant in the liquid cooling channel.

2. A hydraulic pump housing with a liquid-cooled flow channel according to claim 1, characterized in that: The liquid cooling channel has a connecting structure at the corresponding positions of the upper housing (1) and the lower housing (2) of the pump body. It is a cylindrical through hole to ensure that the coolant flows smoothly.

3. A hydraulic pump housing with a liquid-cooled flow channel according to claim 1, characterized in that: The upper port 1 (4) and upper port 2 (5) of the suction and discharge oil flow channel (10) are vertically distributed with the pump body mounting surface, which facilitates pipeline layout.

4. A hydraulic pump housing with a liquid-cooled flow channel according to claim 1, characterized in that: The inner surface of the liquid cooling channel is polished to reduce the flow resistance of the coolant and ensure heat dissipation efficiency. The cross-sectional area of ​​the liquid cooling channel is a variable cross-section structure that first gradually decreases and then gradually increases along the flow direction of the coolant. According to Bernoulli's equation, this ensures that the coolant flow rate and pressure are matched, and enhances the uniformity of heat dissipation.

5. A hydraulic pump housing with a liquid-cooled flow channel according to claim 1, characterized in that: The distance between the oil suction and discharge channel (10) inside the pump body and the liquid cooling channel is 3mm to 5mm. Through finite element analysis, it is verified that the structural stress is less than the allowable stress of the material under high speed and high pressure conditions, ensuring that the heat dissipation effect and the structural strength of the pump body are matched and balanced.

6. A hydraulic pump housing with a liquid-cooled flow channel according to claim 1, characterized in that: The flow guiding mechanism includes a flow guiding pipe (13), which is installed inside the liquid cooling channel. A flow guiding plate (14) is installed inside the flow guiding pipe (13), and a fixed frame (16) is fixedly connected inside the flow guiding pipe (13). A stirring blade (15) is rotatably connected to the outer wall of the fixed frame (16).

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