Brushless motor gear pump integrated cooling system

Abstract

The utility model provides a brushless motor gear pump integrated cooling system, which comprises a brushless motor and a gear pump driven by the brushless motor, the brushless motor comprises a stator and a rotor, the stator is fixedly connected with a pump shell of the gear pump, an annular heat exchange cavity is arranged at the end part of the stator, and the rotor is arranged in the annular heat exchange cavity. A fluid outflow hole communicated with the annular heat exchange cavity is formed in the low-pressure cavity of the pump shell, and a fluid inflow hole communicated with the annular heat exchange cavity is formed in the high-pressure cavity of the pump shell. The annular heat exchange cavity is formed in the end of the stator, the fluid inflow hole and the fluid outflow hole are formed in the low-pressure cavity and the high-pressure cavity of the pump shell, internal circulation of fuel oil is achieved, heat dissipation is carried out through the natural heat conduction characteristic of the fuel oil, an additional cooling system is not needed through the design, and system complexity and energy consumption are reduced.

Description

Technical Field

[0001] The utility model relates to an integrated cooling system for a brushless motor and a gear pump, belonging to the technical field of fluid machinery. Background Art

[0002] As an important equipment in the field of fluid machinery, motor gear pumps have been widely used in industrial production due to their compact structure, high efficiency, and easy maintenance. However, with the continuous improvement of industrial automation and precision control requirements, the performance requirements for motor gear pumps are also getting higher and higher, requiring not only a compact motor structure, but also good heat dissipation capabilities.

[0003] In the traditional motor gear pump design, the heat dissipation of the motor mainly depends on natural convection or forced air cooling, which to a certain extent limits its application in high temperature environments. At the same time, the sealing problem of the motor and the pump body is also an important reason for equipment failure and increased maintenance costs. In order to solve these problems, some improved designs have emerged in the industry, such as using water cooling or oil cooling systems to enhance the heat dissipation effect. However, these solutions often increase the complexity and cost of the system. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model proposes an integrated cooling system for a brushless motor gear pump. The gear pump adopts an internal fluid circulation mechanism to achieve a self-cooling function of the motor, and the entire device has a compact structure, making it more applicable.

[0005] The technical solution of the utility model is: a brushless motor gear pump integrated cooling system, including a brushless motor and a gear pump driven by the brushless motor, the brushless motor including a stator and a rotor, the stator and the pump casing of the gear pump are fixedly connected, an annular heat exchange cavity is arranged at the end of the stator, a fluid outflow hole connected to the annular heat exchange cavity is opened in the low-pressure cavity of the pump casing, and a fluid inlet hole connected to the annular heat exchange cavity is opened in the high-pressure cavity of the pump casing.

[0006] Furthermore, the fluid inflow hole is communicated with a pump outlet of the gear pump, and the fluid outflow hole is communicated with a pump inlet of the gear pump.

[0007] Furthermore, the fluid outflow hole and the fluid inflow hole are arranged symmetrically.

[0008] Furthermore, the diameters of the fluid outflow hole and the fluid inflow hole are the same, the diameters of the pump inlet and the pump outlet are the same, and the diameter of the fluid outflow hole or the fluid inflow hole is 1 / 3 to 1 / 5 of the diameter of the pump inlet or the pump outlet.

[0009] Furthermore, the brushless motor also includes a main shaft drivingly connected to the rotor, the main shaft is rotatably installed in the pump housing through a bearing, a driving gear is fixedly installed at the end of the main shaft, an end cover is fixedly connected to the end of the pump housing, a driven gear is rotatably connected between the pump housing and the end cover through a short shaft, and the driven gear is meshed with the driving gear.

[0010] Furthermore, sealing rings are installed between the end cover and the pump casing, and between the pump casing and the stator.

[0011] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0012] 1. Innovative self-cooling system: The utility model is provided with an annular heat exchange cavity at the end of the stator.

[0013] By arranging fluid inflow holes and fluid outflow holes in the low-pressure chamber and high-pressure chamber of the pump housing, internal circulation of the fuel is achieved, and the natural heat conduction characteristics of the fuel are used to dissipate heat. This design does not require an additional cooling system, reducing system complexity and energy consumption.

[0014] 2. Optimized fluid dynamics layout: The symmetrical arrangement of the fluid inflow holes and the fluid outflow holes and the matching design of their diameters with the pump inlet and pump outlet ensure the uniformity and efficiency of fuel flow and reduce pressure loss.

[0015] 3. Integrated design of motor and gear pump: The main shaft of the motor is directly connected to the gear pump. This design simplifies the transmission structure, reduces energy loss, and makes the overall equipment more compact.

[0016] 4. Technical advantages and potential applications: Compared with the existing technology, the utility model not only achieves significant improvements in structural design and heat dissipation efficiency, but also has broad application prospects in industry, aerospace and other fields that require high-reliability fluid conveying equipment.

[0017] 5. Efficient energy utilization: Through the innovative design of the internal cooling mechanism, the fuel not only takes on the task of heat dissipation during the circulation process, but also effectively utilizes the heat carried by this part of the fuel, indirectly improving the comprehensive utilization rate of energy. This design reduces the energy waste caused by the traditional cooling system and improves the energy efficiency of the entire system.

[0018] 6. Easy to maintain and overhaul: The integrated design is compact and has a clear structure. Key components such as fluid channels, gear assemblies and sealing devices are easy to disassemble and inspect, which facilitates daily maintenance and rapid troubleshooting, reducing maintenance costs and downtime.

[0019] 7. Strong environmental adaptability: The system can effectively utilize the medium flowing through it for cooling, reducing dependence on external conditions. It can maintain stable operation even in extreme temperatures or complex environments, enhancing the environmental adaptability and reliability of the equipment. It is particularly suitable for field operations, extreme climate areas or occasions with limited space.

[0020] In summary, the utility model, with its unique design concept and efficient operation mode, not only optimizes the heat dissipation problem of traditional motor gear pumps, but also shows significant advantages in improving energy efficiency, convenient maintenance, and enhancing environmental adaptability, providing a new technical solution for the field of fluid machinery. The brushless motor gear pump integrated cooling system of the utility model, with its unique cooling strategy, efficient and energy-saving operation mode, sophisticated structural design, and strong adaptability to complex environments, provides excellent solutions for fluid transportation and cooling needs in multiple fields such as aerospace, high-end manufacturing, and energy mining, indicating that it has broad and far-reaching potential for impact in future industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the end structure of the utility model;

[0023] Figure 3 yes Figure 2 AA section view;

[0024] Figure 4 yes Figure 2 BB cross-sectional view;

[0025] Figure 5 It is a schematic diagram of the end structure of the utility model (with the end cover removed).

[0026] Explanation of the reference numerals: 1-end cover; 2-pump casing; 3-stator; 4-rotor; 5-pump outlet; 6-pump inlet; 7-annular heat exchange chamber; 8-main shaft; 9-driving gear; 10-driven gear; 11-short shaft; 12-bearing; 13-low-pressure chamber; 14-high-pressure chamber; 15-fluid outflow hole; 16-fluid inflow hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example

[0029] In this example, the utility model can be used as a fuel supply system for a turbojet engine.

[0030] See also Figures 1 to 5 The utility model discloses a brushless motor gear pump integrated cooling system, comprising a brushless motor and a gear pump driven by the brushless motor, wherein the brushless motor comprises a stator 3 and a rotor 4, wherein the stator 3 is fixedly connected to a pump casing 2 of the gear pump, an annular heat exchange cavity 7 is provided at the end of the stator 3, a fluid outflow hole 15 communicating with the annular heat exchange cavity 7 is provided in a low-pressure cavity 13 of the pump casing 2, and a fluid inflow hole 16 communicating with the annular heat exchange cavity 7 is provided in a high-pressure cavity 14 of the pump casing 2.

[0031] The fluid inflow hole 16 is communicated with the pump outlet 5 of the gear pump, and the fluid outflow hole 15 is communicated with the pump inlet 6 of the gear pump. In this example, the pump outlet 5 is used to connect to the oil inlet of the turbojet engine, and the pump inlet 6 is used to connect to the oil tank.

[0032] The fluid outflow hole 15 and the fluid inflow hole 16 are arranged symmetrically, and the diameters of the fluid outflow hole 15 and the fluid inflow hole 16 are the same, and the diameters of the pump inlet 6 and the pump outlet 5 are the same, and the diameter of the fluid outflow hole 15 or the fluid inflow hole 16 is 1 / 3 to 1 / 5 of the pump inlet 6 or the pump outlet 5. The symmetrical arrangement of the fluid outflow hole 15 and the fluid inflow hole 16 and the matching design of their diameters with the pump inlet 6 and the pump outlet 5 ensure the uniformity and efficiency of the fuel flow and reduce the pressure loss.

[0033] The brushless motor also includes a main shaft 8 drivingly connected to the rotor 4, the main shaft 8 is rotatably mounted in the pump housing 2 via a bearing 12, a driving gear 9 is fixedly mounted at the end of the main shaft 8, an end cover 1 is fixedly connected to the end of the pump housing 2, a driven gear 10 is rotatably connected between the pump housing 2 and the end cover 1 via a short shaft 11, and the driven gear 10 is meshed with the driving gear 9.

[0034] Sealing rings are installed between the end cover 1 and the pump housing 2, and between the pump housing 2 and the stator 3. The sealing between the components is ensured, external pollutants are prevented from entering the pump body, the purity of the internal fluid and the long-term stability of the pump body are ensured, and the maintenance cost and failure rate caused by leakage are reduced.

[0035] The working principle of this utility model:

[0036] The working principle of this utility model is based on a highly integrated and efficient cooling mechanism, which aims to achieve self-cooling and continuous circulation of fluid through the integrated design of brushless motor and gear pump, thereby improving system performance while ensuring continuous and stable operation under high load and high temperature environment. The specific working process is as follows:

[0037] First, when the system starts, the brushless motor starts to run, and its stator 3 and rotor 2 generate a rotational torque under the action of the electromagnetic field, which is transmitted to the driving gear 9 through the main shaft 8, and then drives the driven gear 10 to form a closed mechanical transmission chain. This process ensures that the power of the motor can be efficiently and directly converted into the rotational motion of the gear pump, reducing the energy loss of the intermediate transmission link and improving the overall work efficiency. The fuel enters the pump housing 2 from the pump inlet 6 and then flows in two ways. The first fuel is directly pumped to the high-pressure chamber 14 and supplied to downstream equipment such as a turbojet engine through the pump outlet 5 to meet its demand for fuel. The second fuel enters the annular heat exchange chamber 7 at the end of the stator 3 through the carefully designed fluid inflow hole 16. The design of this annular heat exchange chamber 7 is a major innovation of the utility model. It uses the contact between the fuel and the surface of the motor stator 3 during the flow process to achieve heat transfer to the motor's heating components and effectively take away the heat generated when the motor is working. This cooling method not only avoids the installation of additional cooling equipment, but also greatly simplifies the system structure and reduces the complexity and maintenance cost of the system. Subsequently, the fuel oil that has absorbed heat through the annular heat exchange chamber 7 returns to the low-pressure chamber 13 through the fluid outflow hole 15. This path design ensures that the fuel oil can smoothly flow back after completing the heat exchange and continue to participate in the next round of circulation. The symmetrical layout of the fluid inflow hole 16 and the fluid outflow hole 15 and their reasonable diameter matching with the pump inlet 6 and the pump outlet 5 ensure the uniformity and dynamic efficiency of the fuel oil flow, reduce pressure loss, and improve the smoothness of the entire circulation process. In this circulation mechanism, the fuel oil plays a dual role: it is both the power medium of the transmission system and the coolant of the motor. This "killing two birds with one stone" design concept allows the fuel oil to provide power for the gear pump while also providing a heat dissipation path for the brushless motor, realizing efficient reuse of resources and improving the energy utilization of the system.

[0038] In summary, the utility model not only solves the limitations of traditional motor gear pumps in heat dissipation through its unique internal cooling circulation system, but also ensures efficient and reliable operation of the system under various working conditions through integrated design and optimized fluid dynamics layout. This design is not only applicable to the industrial field, but also to aerospace and other high-tech industries that have strict requirements on the reliability of fluid conveying equipment, showing a wide range of application potential and significant technological progress.

Claims

1. A brushless motor gear pump integrated cooling system, comprising a brushless motor and a gear pump driven by the brushless motor, wherein the brushless motor comprises a stator (3) and a rotor (4), and is characterized in that: The stator (3) is fixedly connected to the pump housing (2) of the gear pump, an annular heat exchange chamber (7) is provided at the end of the stator (3), a fluid outflow hole (15) communicating with the annular heat exchange chamber (7) is provided in the low-pressure chamber (13) of the pump housing (2), and a fluid inflow hole (16) communicating with the annular heat exchange chamber (7) is provided in the high-pressure chamber (14) of the pump housing (2).

2. The brushless motor gear pump integrated cooling system according to claim 1, characterized in that: The fluid inflow hole (16) is in communication with the pump outlet (5) of the gear pump, and the fluid outflow hole (15) is in communication with the pump inlet (6) of the gear pump.

3. The brushless motor gear pump integrated cooling system according to claim 2, characterized in that: The fluid outflow hole (15) and the fluid inflow hole (16) are arranged symmetrically.

4. The brushless motor gear pump integrated cooling system according to claim 3, characterized in that: The diameters of the fluid outflow hole (15) and the fluid inflow hole (16) are the same, the diameters of the pump inlet (6) and the pump outlet (5) are the same, and the diameter of the fluid outflow hole (15) or the fluid inflow hole (16) is 1 / 3 to 1 / 5 of the diameter of the pump inlet (6) or the pump outlet (5).

5. The brushless motor gear pump integrated cooling system according to claim 1, characterized in that: The brushless motor further comprises a main shaft (8) drivingly connected to the rotor (4); the main shaft (8) is rotatably mounted in the pump housing (2) via a bearing (12); a driving gear (9) is fixedly mounted at the end of the main shaft (8); an end cover (1) is fixedly connected to the end of the pump housing (2); a driven gear (10) is rotatably connected between the pump housing (2) and the end cover (1) via a short shaft (11); and the driven gear (10) is meshed with the driving gear (9).

6. The brushless motor gear pump integrated cooling system according to claim 5, characterized in that: Sealing rings are installed between the end cover (1) and the pump casing (2), and between the pump casing (2) and the stator (3).

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