Internal circulation oil cooling type permanent magnet direct current motor
The internal circulation oil-cooled permanent magnet DC motor solves the heat dissipation problem of traditional motors under high load and high temperature environments through the oil cooling circulation system and thermal conductive metal design, achieving stable operation and efficient power output, extending the motor life and reducing maintenance costs.
Patent Information
- Application Number
- CN202422904944.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Traditional motors have low heat dissipation efficiency under high load and high temperature environments, resulting in reduced winding insulation performance, shortened service life, and inability to operate continuously and stably.
It adopts an internal circulation oil cooling design, combined with oil extraction fan blades, heat-conducting metal and cooling fan to achieve circulation heat dissipation of cooling oil, and quickly conducts heat through the heat-conducting metal. The limit ring and slot structure ensure the stable rotation of the rod and reduce vibration and noise.
It improves the heat resistance and reliability of the motor, extends its service life, ensures the stable operation of the motor under high load and high temperature environment, and reduces the cost of maintenance and replacement.
Smart Images
Figure CN223451767U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technology especially relates to internal circulation oil cooling type permanent magnet DC motor. BACKGROUND
[0002] In modern industry and many technical application fields, the use of motor is extremely wide. When the traditional motor runs, a large amount of heat is generated due to the resistance heat generated by the current through the winding and the magnetic hysteresis loss of the core. If the heat cannot be dissipated in time and effectively, the temperature of the motor will continue to rise, thereby causing a series of problems. On the one hand, the high temperature will cause the insulation performance of the motor winding to decrease, shorten the service life of the motor, and even cause serious faults such as short circuit of the winding, so that the motor cannot work normally, affecting the production efficiency and the stability of equipment operation. On the other hand, the ordinary motor cooling method is often single or has limited cooling efficiency, which is difficult to meet the cooling demand under the working condition of high power and long time continuous operation.
[0003] In some industrial automation production lines, electric vehicle drive systems and other application scenarios, the motor needs to run continuously under high load, and the traditional cooling means cannot guarantee that the motor is always in the appropriate working temperature range.
[0004] Therefore, it has become a technical problem to be solved to develop a motor with high cooling performance and stable operation, and the internal circulation oil cooling type permanent magnet DC motor emerges as the times require, aiming to overcome the many drawbacks of the traditional motor cooling and improve the overall performance and reliability of the motor. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide a motor with excellent cooling performance and good environmental adaptability. Another purpose of the utility model is to provide effective reduction of operating loss.
[0006] Technical scheme: the internal circulation oil cooling type permanent magnet DC motor comprises a cooling seat, a clamping groove is formed in the upper surface of the cooling seat, a transition cavity is clamped and connected in the clamping groove, a motor body is fixedly connected in the transition cavity, an oil storage rotating groove is formed in the motor body, rotating openings are formed at both ends of the oil storage rotating groove, a limiting circular groove is formed in the rotating opening, a rotating rod is rotatably connected in the rotating openings, a winding is wound on the outer wall of the rotating rod, an iron core is fixedly connected to the outer wall of the winding, an oil inlet pipe is fixedly communicated between the left side in the oil storage rotating groove and the left side of the outer wall of the transition cavity, an oil outlet pipe is fixedly communicated between the right side in the oil storage rotating groove and the right side of the outer wall of the transition cavity, an oil extraction fan blade is fixedly connected to the outer wall of the rotating rod in the oil storage rotating groove, and ferromagnetic blocks are fixedly connected to the inner wall of the oil storage rotating groove.
[0007] Furthermore, one end of the oil inlet pipe away from the transition chamber is fixedly connected to a one-way water inlet chamber inside the oil storage tank, and the inside of the one-way water inlet chamber is rotatably connected to a water blocking inclined plate via a rotating shaft.
[0008] Furthermore, the upper surface of the one-way water inlet chamber is fixedly connected to a reset chamber, the interior of the reset chamber is slidably connected to a sliding plate, the lower surface of the sliding plate is fixedly connected to an extrusion plate, the bottom end of the extrusion plate passes through the interior of the one-way water inlet chamber, the bottom end of the extrusion plate is fixedly connected to an inclined block, the lower surface of the inclined block contacts the upper surface of the water blocking inclined plate, and a plurality of springs are fixedly connected between the upper surface of the sliding plate and the inner upper surface of the one-way water inlet chamber.
[0009] Furthermore, the outer wall of the cooling seat is symmetrically provided with fan slots, the inner left side of the fan slots are fixedly connected with support plates, the opposite ends of the support plates are fixedly connected with cooling fans, and the outer wall of the fan slots is fixedly connected with a filter cover.
[0010] Furthermore, the outer side walls of the rotating rod are symmetrically fixedly connected to the limiting rings, and the outer side walls of the limiting rings are slidably connected to the inner sides of the adjacent limiting circular grooves.
[0011] Furthermore, a groove is formed on the outer wall of the transition cavity, and a heat-conducting metal is fixedly connected to the inside of the groove.
[0012] Beneficial effects: The heat dissipation design of the internal circulation oil-cooled permanent magnet DC motor has many advantages. Its unique oil-cooling circulation system uses the rotation of the oil extraction fan blades to allow the cooling oil to circulate stably between the oil storage tank and the transition cavity. In this process, the cooling oil can fully absorb the heat generated by the winding and the iron core, and send the heated cooling oil back to the transition cavity through the oil outlet pipe for heat dissipation. At the same time, the heat-conducting metal on the outside of the transition cavity can quickly transfer heat to the air, further improving the heat dissipation efficiency. In addition, the setting of the cooling fan accelerates the air flow and effectively reduces the temperature of the cooling seat and the transition cavity. This all-round heat dissipation mechanism effectively prevents the motor from experiencing performance degradation or damage due to overheating. Whether it is under high load operation or in a high temperature environment, the motor can maintain a stable working state, which greatly improves the heat resistance and reliability of the motor, extends the service life of the motor, reduces the maintenance and replacement costs caused by overheating, and ensures the continued normal operation of related equipment;
[0013] The motor shows excellent performance improvement effect in structural design. The limiting ring on the rotating rod is in close sliding connection with the limiting circular groove of the rotating port, which accurately limits the axial position of the rotating rod, avoids its movement, simultaneously shares the radial force, guarantees the smoothness and stability of the rotating rod, enables the winding and the oil pumping fan blade to stably operate, and further ensures the stable and efficient power output. The ferromagnetic block inside the oil storage rotating groove optimizes the magnetic field distribution, so that the motor can accurately provide power under different working conditions and meet diversified application requirements. The clamping of the clamping groove and the transition cavity and the stable connection between the components reduce the vibration and noise in operation, so that the motor operates more stably and quietly. The one-way water inlet cavity assembly ensures the one-way circulation of the cooling oil and maintains the stability of the cooling system. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is the overall structure schematic diagram of the utility model;
[0015] Figure 2 is the overall structure schematic diagram of the cooling seat of the utility model;
[0016] Figure 3 is the sectional structure schematic diagram of the motor body of the utility model;
[0017] Figure 4 is the sectional structure schematic diagram of the one-way water inlet cavity of the utility model.
[0018] In the drawing: 1, cooling seat; 2, clamping groove; 3, transition cavity; 4, motor body; 5, oil storage rotating groove; 6, rotating port; 7, limiting circular groove; 8, rotating rod; 9, winding; 26, iron core; 10, oil inlet pipe; 11, oil outlet pipe; 12, oil pumping fan blade; 13, one-way water inlet cavity; 14, water blocking inclined plate; 15, reset cavity; 16, sliding plate; 17, extrusion plate; 18, inclined block; 19, spring; 20, fan groove; 21, support plate; 22, cooling fan; 23, filter cover; 27, limiting ring; 24, recess; 25, heat-conducting metal; 28, ferromagnetic block. DETAILED DESCRIPTION
[0019] In order to make the technical scheme of the utility model more clear, the utility model will be further described in detail in combination with the drawings and specific embodiments.
[0020] Embodiment 1
[0021] As Figures 1-4As shown, an inner circulation oil-cooled permanent magnet DC motor is provided, comprising a cooling seat 1, the upper surface of the cooling seat 1 is provided with a clamping groove 2, the inside of the clamping groove 2 is clamped and connected with a transition cavity 3, the inside of the transition cavity 3 is fixedly connected with a motor body 4, the inside of the motor body 4 is provided with an oil storage rotating groove 5, both ends of the oil storage rotating groove 5 are provided with rotating ports 6, the inside of the rotating port 6 is provided with a limiting circular groove 7, one rotating rod 8 is rotatably connected inside the two rotating ports 6, the outer wall of the rotating rod 8 is provided with a winding 9, the outer wall of the winding 9 is fixedly connected with an iron core 26, the inside left side of the oil storage rotating groove 5 and the outside left wall of the transition cavity 3 are fixedly communicated with an oil inlet pipe 10, the inside right side of the oil storage rotating groove 5 and the outside right wall of the transition cavity 3 are fixedly communicated with an oil outlet pipe 11, the outer wall of the rotating rod 8, located inside the oil storage rotating groove 5, is fixedly connected with an oil extraction fan blade 12, the inside wall of the oil storage rotating groove 5 is fixedly connected with ferromagnetic blocks 28;
[0022] In terms of cooling function, through the unique oil-cooled circulation system, excellent heat dissipation is achieved. When the motor is running, the oil extraction fan blade 12 rotates with the rotating rod 8, which promotes the circulation of cooling oil between the oil storage rotating groove 5 and the transition cavity 3. The cooling oil flowing from the transition cavity 3 into the oil storage rotating groove 5 through the oil inlet pipe 10 can effectively absorb the heat generated by the winding 9 and the iron core 26, and the heated cooling oil returns to the transition cavity 3 through the oil outlet pipe 11 to dissipate heat, thus continuously removing heat and preventing the motor from overheating and performance degradation or damage, greatly improving the heat resistance and reliability of the motor, allowing it to work continuously under high load. Secondly, in terms of power output function, the magnetic field generated by the permanent magnet and the winding 9 interacts to drive the rotating rod 8 to rotate, driving the load to run. The ferromagnetic blocks 28 on the inside wall of the oil storage rotating groove 5 can optimize the magnetic field environment, making the magnetic field distribution more reasonable, thereby improving the stability and efficiency of power output, allowing the motor to accurately provide power under different working conditions and meet diverse application requirements. Furthermore, the clamping groove 2 and the transition cavity 3, the rotating connection of the rotating port 6 and the rotating rod 8, etc., ensure the stability and synergy of each component, reduce vibration and noise during operation, and make the motor run more smoothly and quietly, comprehensively exhibiting the combined functional advantages of efficient heat dissipation, stable power output, and good running quality.
[0023] In this embodiment, the end of the oil inlet pipe 10 away from the transition cavity 3 is fixedly connected with a one-way water inlet cavity 13 inside the oil storage rotating groove 5, the one-way water inlet cavity 13 is rotatably connected with a water blocking inclined plate 14 through a rotating shaft, the upper surface of the one-way water inlet cavity 13 is fixedly connected with a reset cavity 15, the inside of the reset cavity 15 is slidably connected with a sliding plate 16, the lower surface of the sliding plate 16 is fixedly connected with an extrusion plate 17, the bottom end of the extrusion plate 17 penetrates into the inside of the one-way water inlet cavity 13, the bottom end of the extrusion plate 17 is fixedly connected with an inclined block 18, the lower surface of the inclined block 18 is in contact with the upper surface of the water blocking inclined plate 14, a plurality of springs 19 are fixedly connected between the upper surface of the sliding plate 16 and the inside upper surface of the one-way water inlet cavity 13.
[0024] The one-way water inlet cavity assembly plays a key role in the motor cooling system. Initially, the spring 19 is in a natural state, the sliding plate 16 is located at the bottom of the reset cavity 15, the inclined block 18 makes the water blocking inclined plate 14 in an inclined closed state, preventing the oil in the oil storage groove 5 from flowing back through the oil inlet pipe 10. When the motor is running, the oil extraction fan blade 12 works to reduce the pressure in the oil storage groove 5, generating negative pressure, which acts on the one-way water inlet cavity 13. Under the action of negative pressure suction, the sliding plate 16 overcomes the elastic force of the spring 19 and moves upward, driving the inclined block 18 to rise and release the pressure on the water blocking inclined plate 14. Thus, the cooling oil in the oil inlet pipe 10 pushes open the water blocking inclined plate 14 and flows into the oil storage groove 5 under the action of pressure difference, realizing one-way oil inlet. When the pressure in the oil storage groove 5 rises, the spring 19 rebounds, the sliding plate 16 moves downward, and the inclined block 18 again presses the water blocking inclined plate 14 to close the oil inlet, ensuring that the oil can only flow out from the oil outlet pipe, maintaining the stable circulation and efficient operation of the cooling system, and ensuring the normal operation of the motor.
[0025] In this embodiment, the outer side wall of the cooling seat 1 is symmetrically provided with fan grooves 20, the inner left side of each fan groove 20 is fixedly connected with a support plate 21, the opposite end of each support plate 21 is fixedly connected with a cooling fan 22, and the outer side wall of each fan groove 20 is fixedly connected with a filter cover 23.
[0026] The fan grooves 20 symmetrically arranged on the outer side wall of the cooling seat 1 provide installation space for the cooling fans 22. The cooling fans 22 are stably fixed inside the left side of the fan grooves 20 through the support plates 21, and are started synchronously when the motor is running. The main function of the cooling fans 22 is to accelerate air flow, so that air quickly flows over the surface of the cooling seat 1 and carries away heat, further improving the overall heat dissipation efficiency of the motor. Especially when the motor is running under high load or in a high-temperature environment, the cooling fans 22 play a more significant role, which can effectively reduce the temperature of the cooling seat 1 and other components such as the transition chamber 3 connected thereto, preventing excessive heat accumulation from affecting the performance of the motor. The filter cover 23 plays a protective role, which can prevent foreign matters such as dust and impurities from entering the fan grooves 20, avoid these foreign matters from adhering to the blades of the cooling fans 22 to affect their rotation balance and heat dissipation effect, and also prevent foreign matters from entering other critical parts of the motor, ensuring the stable operation of the motor in a relatively clean environment, prolonging the service life of the motor and maintaining its good working performance.
[0027] In this embodiment, the outer side wall of the rotating rod 8 is symmetrically fixedly connected with a limiting ring 27, and the outer side wall of each limiting ring 27 is slidably connected with the inner side of the adjacent limiting circular groove 7.
[0028] The limiting rings 27 symmetrically fixedly connected to the outer side wall of the rotating rod 8 play a crucial role in positioning and stabilizing during the operation of the motor.
[0029] When the rotating rod 8 rotates under the drive of the motor, its two ends are respectively located in the limiting circular groove 7 opened inside the rotating port 6, and the outer wall of the limiting ring 27 is tightly slidably connected to the adjacent limiting circular groove 7. This connection method can accurately define the axial position of the rotating rod 8, prevent the rotating rod 8 from axial movement during the rotation process, ensure that the rotating rod 8 always remains on the correct rotation axis, so that the winding 9 wound on the rotating rod 8 and the fixedly connected oil pumping fan blades 12 and other components can operate stably in the predetermined spatial position. At the same time, the sliding fit between the limiting ring 27 and the limiting circular groove 7 also provides a certain support force for the rotation of the rotating rod 8, shares part of the radial force borne by the rotating rod 8 during rotation, reduces the bending deformation of the rotating rod 8 due to uneven force, ensures the smooth rotation of the rotating rod 8 and the stability of the entire motor structure, and thus helps the motor to output power continuously, stably and efficiently.
[0030] In this embodiment, a groove 24 is formed on the outer wall of the transition chamber 3, and a heat-conducting metal 25 is fixedly connected to the interior of the groove 24;
[0031] When the motor is running, the heat generated inside the motor body 4 is initially dissipated through the cooling oil circulation within the oil storage tank 5, and some of the heat is transferred to the connected transition chamber 3. At this time, the heat-conducting metal 25 located within the groove 24 begins to play a role. The heat-conducting metal 25 has excellent thermal conductivity and can quickly conduct the heat absorbed by the transition chamber 3. On the one hand, the heat can be dissipated to the surrounding air through the heat-conducting metal 25, accelerating the heat dissipation rate of the transition chamber 3 itself, allowing the transition chamber 3 to maintain a relatively low temperature, thereby more efficiently participating in the entire cooling circulation system and ensuring that the heated cooling oil flowing back from the oil storage tank 5 can better complete the heat release process within the transition chamber 3.
[0032] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.
Claims
1. An internal circulation oil-cooled permanent magnet DC motor, comprising a cooling seat (1), characterized in that: A slot (2) is provided on the upper surface of the cooling seat (1), a transition chamber (3) is snap-connected to the interior of the slot (2), and a motor body (4) is fixedly connected to the interior of the transition chamber (3); An oil storage groove (5) is provided inside the motor body (4), and a rotation port (6) is provided at both ends of the oil storage groove (5). A limited circular groove (7) is provided inside the rotation port (6), and a rotating rod (8) is connected to the inside of the two rotation ports (6) for common rotation. A winding (9) is wound around the outer wall of the rotating rod (8), and an iron core (26) is fixedly connected to the outer wall of the winding (9). An oil inlet pipe (10) is fixedly connected between the inner left side of the oil storage groove (5) and the left side of the outer wall of the transition chamber (3), and an oil outlet pipe (11) is fixedly connected between the inner right side of the oil storage groove (5) and the right side of the outer wall of the transition chamber (3). The outer wall of the rotating rod (8) is located inside the oil storage groove (5) and is fixedly connected to an oil pumping fan blade (12). The inner wall of the oil storage groove (5) is symmetrically fixedly connected to a ferromagnetic block (28).
2. The internal circulation oil-cooled permanent magnet DC motor according to claim 1, characterized in that: One end of the oil inlet pipe (10) away from the transition chamber (3) is located inside the oil storage tank (5) and is fixedly connected to a one-way water inlet chamber (13). The interior of the one-way water inlet chamber (13) is rotatably connected to a water blocking inclined plate (14) via a rotating shaft.
3. The internal circulation oil-cooled permanent magnet DC motor according to claim 2, characterized in that: The upper surface of the one-way water inlet chamber (13) is fixedly connected to a reset chamber (15), the interior of the reset chamber (15) is slidably connected to a sliding plate (16), the lower surface of the sliding plate (16) is fixedly connected to an extrusion plate (17), the bottom end of the extrusion plate (17) penetrates into the interior of the one-way water inlet chamber (13), the bottom end of the extrusion plate (17) is fixedly connected to an inclined block (18), the lower surface of the inclined block (18) contacts the upper surface of the water blocking inclined plate (14), and a plurality of springs (19) are fixedly connected between the upper surface of the sliding plate (16) and the inner upper surface of the one-way water inlet chamber (13).
4. The internal circulation oil-cooled permanent magnet DC motor according to claim 1, characterized in that: The outer wall of the cooling seat (1) is symmetrically provided with a fan slot (20), the inner left side of each of the fan slots (20) is fixedly connected to a support plate (21), the opposite end of each of the support plates (21) is fixedly connected to a cooling fan (22), and the outer wall of the fan slot (20) is fixedly connected to a filter cover (23).
5. The internal circulation oil-cooled permanent magnet DC motor according to claim 1, characterized in that: The outer side wall of the rotating rod (8) is symmetrically fixedly connected to the limiting ring (27), and the outer side wall of the limiting ring (27) is slidably connected to the inside of the adjacent limiting circular groove (7).
6. The internal circulation oil-cooled permanent magnet DC motor according to claim 1, characterized in that: A groove (24) is provided on the outer side wall of the transition cavity (3), and a heat-conducting metal (25) is fixedly connected to the interior of the groove (24).