A multi-pole synchronous motor with a water-cooled base

Abstract

This invention belongs to the field of synchronous motor technology, specifically a multi-pole synchronous motor with a water-cooled base. The water-cooled base includes a water jacket core with water channels. An outer cover plate is installed on the water channels. Interconnected movable ring plates are installed within the water channels. An expansion bag is installed between the movable ring plate and the side wall of the water channels. A fixing ring is installed on the expansion bag, and an elastic sleeve is installed on the fixing ring, which is inserted into a water outlet pipe. Micropores are provided on the surface of the expansion bag and the connecting bag. This invention has a simple structure, utilizes cooling water within the water channels to dissipate heat and cool the synchronous motor, and uses the bulging expansion bag to push the movable ring plates within the water channels to clean accumulated scale and impurities. This reduces the water quality requirements and heat dissipation energy consumption of the cooling water, ensures effective heat dissipation and cooling, and guarantees the safe and stable operation of the synchronous motor.

Description

Technical Field

[0001] This invention belongs to the field of synchronous motor technology, specifically a multi-pole synchronous motor with a water-cooled frame. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. An electric motor includes a stator, stator windings, frame, rotor, end covers, bearings, and bearing end covers. Its main function is to generate driving torque and serve as a power source for electrical appliances or various machines.

[0003] The function of the frame is to fix the stator core and the front and rear end covers to support the rotor, and to provide protection and heat dissipation. Existing motor frames have ventilation holes on the end covers at both ends, which allows the air inside and outside the motor to convect directly, thus facilitating heat dissipation.

[0004] However, when motors operate for extended periods, especially high-power motors, the heat dissipation problem cannot be effectively solved by air convection in summer. As a result, motors are prone to failure due to overheating. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a multi-pole synchronous motor with a water-cooled base. The invention utilizes cooling water in the water channel to dissipate heat and cool the synchronous motor. The bulging expansion bag pushes the movable ring plate to move within the water channel to clean the accumulated scale and impurities, thereby reducing the water quality requirements and heat dissipation energy consumption of the cooling water, ensuring the heat dissipation and cooling effect, and ensuring the safe and stable operation of the synchronous motor.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a multi-pole synchronous motor with a water-cooled base, including a water-cooled base, the water-cooled base including a water jacket core, end plates installed at both ends of the water jacket core, a junction box installed on the water jacket core, uniformly distributed water channels opened on the outer surface of the water jacket core, an outer cover plate installed on the water channels, and an inlet pipe and an outlet pipe installed on the outer cover plate;

[0007] The water jacket core has an outlet that connects adjacent water channels. A block is installed in the water channel. The block and the outlet cooperate to divide the water channel into two connected parts. The liquid flows in opposite directions in the two parts of the water channel. The liquid flows in an S-shape in each part of the water channel.

[0008] The water channel is equipped with movable ring plates, which are connected to each other by connecting rods. The end of the movable ring plate is close to the water outlet pipe. An expansion bag is installed between the movable ring plate and the side wall of the water channel. A connecting bag is installed on the expansion bag. A fixing rod is installed on the water outlet pipe. A fixing ring is installed on the fixing rod. An elastic sleeve is installed on the fixing ring. The end of the elastic sleeve away from the fixing ring is inserted into the water outlet pipe.

[0009] The surfaces of the expansion bag and the connecting bag are provided with micropores. When the expansion bag inflates, it pushes the movable ring plate to move along the width direction in the water channel.

[0010] Preferably, the outer cover includes an upper plate and a lower plate, the upper plate and the lower plate respectively corresponding to the two parts separated by the water channel;

[0011] The outer cover plate has protrusions on its surface and grooves on its movable ring plate. The protrusions are inserted into the grooves, and the length direction of the protrusions and grooves is the same as the width direction of the water channel.

[0012] Preferably, a reinforcing plate is installed inside the movable ring plate, and multiple sets of reinforcing plates are provided, with the cross-sectional shape of the reinforcing plate being H-shaped.

[0013] Preferably, an elastic rod is installed inside the side wall of the elastic sleeve, and the elastic rod drives the elastic sleeve to approach the inner wall of the outlet pipe;

[0014] A magnetic block is installed at the end of the elastic sleeve away from the fixed ring. There is a magnetic attraction between the magnetic block and the water outlet pipe. An attraction groove is opened on the inner wall of the water outlet pipe. The magnetic block is stuck into the attraction groove under the action of magnetic attraction.

[0015] The fixing rod is located on the periphery of the elastic sleeve.

[0016] Preferably, the height of the protrusion is greater than the depth of the groove, the width of the movable ring plate is greater than the depth of the water channel, and the movable ring plate is installed between the outer cover plate and the water channel by an interference fit.

[0017] Preferably, a deformation layer is installed on the surface of the movable ring plate, and a cavity is formed in the deformation layer. The cavity is filled with a moving liquid, and the moving liquid expands in volume as the temperature rises.

[0018] Preferably, the width of the deformable layer is smaller than the width of the movable ring plate.

[0019] Preferably, the water channels on the surface of the water jacket core can be located in several ways: the water channels are located on the outer surface of the water jacket core, the water channels are located on the inner surface of the water jacket core, or the water channels are located on both the outer and inner surfaces of the water jacket core.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The present invention discloses a multi-pole synchronous motor with a water-cooled base. By setting up a water channel, a movable ring plate, a water outlet pipe, an elastic sleeve, and an expansion bag, the cooling water in the water channel carries away the heat generated during the operation of the synchronous motor, keeping the synchronous motor temperature low and ensuring safe and stable operation. At the same time, when the cooling water flows in the reverse direction, the cooling water enters the expansion bag from the water outlet pipe. The bulging expansion bag pushes the movable ring plate to move within the water channel, cleaning the inner wall of the water channel and preventing scale and impurities from accumulating in the water channel, which could cause the synchronous motor to overheat and malfunction.

[0022] 2. The multi-pole synchronous motor with a water-cooled base described in this invention, by setting a reinforcing plate, as well as protrusions on the movable ring plate and grooves on the outer cover plate, enables the movable ring plate to move stably within the water channel, avoiding skewing or displacement of the movable ring plate, which would affect the heat dissipation and cooling effect. At the same time, it also avoids the movable ring plate from being too weak and deforming during movement. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a perspective view of the water-cooled base of the present invention;

[0025] Figure 2 This is a perspective view of the water jacket core in the water-cooled base of the present invention, wherein the movable ring plate is stopped at the initial position;

[0026] Figure 3 This is a perspective view of the water jacket core in the water-cooled base of the present invention, wherein the movable ring plate is in motion;

[0027] Figure 4 This is a schematic diagram of the structure of the outer cover plate installed on the water jacket core in the water-cooled machine base of the present invention;

[0028] Figure 5 yes Figure 1 Top view F, left view L, and right view R of the upper half of the water jacket core after horizontal sectioning of the outer cover plate installed in the middle;

[0029] Figure 6 This is a perspective view of the water outlet pipe, connecting bag, and expansion bag in the water-cooled base of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the water outlet pipe, connecting bag, and expansion bag in the water-cooled base of the present invention;

[0031] Figure 8 This is a schematic diagram showing the positions of the movable ring plate and the connecting rod in the water-cooled base of the present invention;

[0032] Figure 9 This is a schematic diagram of the movable ring plate in the water-cooled machine base of the present invention;

[0033] Figure 10 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0034] Figure 11 yes Figure 3 Enlarged view of a section at point B in the middle;

[0035] Figure 12 yes Figure 7 Enlarged view of a section at point C;

[0036] In the diagram: Water jacket core 1, end plate 11, junction box 12, inlet pipe 13, outlet pipe 14, fixing ring 15, fixing rod 151, elastic sleeve 152, elastic rod 153, magnetic block 154, outer cover plate 2, upper plate 21, lower plate 22, water channel 3, flow port 31, block 32, movable ring plate 4, connecting rod 41, reinforcing plate 42, deformation layer 43, expansion bag 5, connecting bag 51. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] like Figures 1 to 12 As shown, the present invention discloses a multi-pole synchronous motor with a water-cooled base, including a water-cooled base, the water-cooled base including a water jacket core 1, end plates 11 installed at both ends of the water jacket core 1, a junction box 12 installed on the water jacket core 1, uniformly distributed water channels 3 opened on the outer surface of the water jacket core 1, an outer cover plate 2 installed on the water channels 3, and an inlet pipe 13 and an outlet pipe 14 installed on the outer cover plate 2;

[0039] The water jacket core 1 has an outlet 31, which connects adjacent water channels 3. A block 32 is installed in the water channel 3. The block 32 and the outlet 31 cooperate to divide the water channel 3 into two connected parts. The liquid flows in opposite directions in the two parts of the water channel 3, and the liquid flows in an S-shape in each part of the water channel 3.

[0040] A movable ring plate 4 is installed inside the water channel 3. The movable ring plates 4 are connected to each other by a connecting rod 41. The end of the movable ring plate 4 is close to the water outlet pipe 14. An expansion bag 5 is installed between the movable ring plate 4 and the side wall of the water channel 3. A connecting bag 51 is installed on the expansion bag 5. A fixing rod 151 is installed on the water outlet pipe 14. A fixing ring 15 is installed on the fixing rod 151. An elastic sleeve 152 is installed on the fixing ring 15. The end of the elastic sleeve 152 away from the fixing ring 15 is inserted into the water outlet pipe 14.

[0041] The surfaces of the expansion bag 5 and the connecting bag 51 are provided with micropores. When the expansion bag 5 inflates, it pushes the movable ring plate 4 to move along the width direction in the water channel 3.

[0042] When a multi-pole synchronous motor is running, the heat generated by the motor is quickly dissipated through the water-cooled base, ensuring that the motor temperature does not get too high and that the motor runs safely and stably.

[0043] When cooling the synchronous motor, external cooling water is pumped into the water channel 3 from the inlet pipe 13 through a circulating pump. The cooling water flows to the outlet pipe 14 in the water channel 3 and is discharged from the outlet pipe 14. This allows the cooling water to carry away the heat generated during the operation of the motor and ensure that the motor temperature is relatively low. At the same time, the direction of the cooling water in the water channel 3 from the inlet pipe 13 to the outlet pipe 14 is defined as the positive direction of the cooling water flow.

[0044] Due to environmental and practical limitations, the cooling water used for cooling is often simply purified from existing water sources and used directly. This results in some impurities or scale remaining in the cooling water. After the synchronous motor has been running for a long time, impurities or scale accumulate in the water channel 3, which affects the cooling effect on the synchronous motor. Therefore, a movable ring plate 4 is installed in the water channel 3. The movement of the movable ring plate 4 cleans and scrapes the inner wall of the water channel 3, avoiding or delaying the accumulation of impurities and scale in the water channel 3, ensuring good cooling effect, and ensuring the normal and stable operation of the synchronous motor.

[0045] Meanwhile, when cleaning the water channel 3, by controlling the external circulation pump, the circulation pump drives the cooling water to flow in reverse after a fixed interval. At this time, the cooling water will enter the water channel 3 from the outlet pipe 14. Since the outlet pipe 14 is equipped with a connecting bag 51 and an expansion bag 5, the reverse-flowing cooling water will fill the expansion bag 5, causing the volume of the expansion bag 5 to gradually increase. The bulging expansion bag 5 pushes the movable ring plate 4, causing the movable ring plate 4 to move in the width direction in the water channel 3, scraping and cleaning the inner wall of the water channel 3, avoiding or delaying the accumulation of scale and impurities. At the same time, since the expansion bag 5 and the connecting bag 51 have micropores, the cooling water flowing in reverse in the outlet pipe 14 fills the expansion bag 5, causing the expansion bag 5 to bulge. The cooling water in the expansion bag 5 will flow out from the micropores into the water channel 3, and flow in reverse along the water channel 3 to the inlet pipe 13 for discharge.

[0046] Meanwhile, since an elastic sleeve 152 is installed at the outlet pipe 14 and is inserted into the outlet pipe 14, when the cooling water flows in the forward direction, the cooling water flows from the water channel 3 into the outlet pipe 14. At this time, the pressure in the water channel 3 is relatively greater than the pressure in the outlet pipe 14, causing the elastic sleeve 152 to deform under pressure. This creates a gap between the outer wall of the elastic sleeve 152 and the inner wall of the outlet pipe 14, facilitating the entry of cooling water from the water channel 3 into the outlet pipe 14. Simultaneously, when the cooling water flows in the reverse direction, the outlet... The pressure inside the water pipe 14 is greater than the pressure inside the water channel 3. After the inner wall of the elastic sleeve 152 is subjected to pressure, the outer wall of the elastic sleeve 152 is pressed tightly against the inner wall of the outlet pipe 14, thereby causing the cooling water in the outlet pipe 14 to be discharged from the elastic sleeve 152 and further enter the connecting bag 51 and the expansion bag 5, thereby driving the movable ring plate 4 to move. At the same time, after the cooling water resumes its forward flow, the movable ring plate 4 will return to its original position under the impact of the cooling water in the water channel 3 and the elastic force of the expansion bag 5 contraction.

[0047] Meanwhile, a block 32 and an outlet 31 are installed in the water channel 3 on the water jacket core 1, so that the water channel 3 on the water jacket core 1 is divided into upper and lower parts, and the two parts of the water channel 3 are connected end to end, so that the cooling water flows in an S-shape in both parts of the water channel 3, which improves the cooling effect on the synchronous motor and ensures the normal and stable operation of the motor.

[0048] In one embodiment of the present invention, the outer cover plate 2 includes an upper plate 21 and a lower plate 22, the upper plate 21 and the lower plate 22 respectively corresponding to the two parts separated by the water channel 3;

[0049] The outer cover plate 2 has protrusions on its surface and the movable ring plate 4 has grooves. The protrusions are inserted into the grooves. The length direction of the protrusions and grooves is the same as the width direction of the water channel 3.

[0050] Because the circumference of the water channel 3 is too large relative to its width, the movable ring plate 4 inside the water channel 3 is elongated. As a result, when the movable ring plate 4 moves along the width direction inside the water channel 3, it is easy for the movable ring plate 4 to become skewed or deviated, which affects the cleaning effect of the movable ring plate 4 on the water channel 3. At the same time, when the movable ring plate 4 is seriously tilted, the skewed movable ring plate 4 may block the water channel 3, causing the cooling water to not flow smoothly and affecting the normal operation of the synchronous motor.

[0051] Therefore, protrusions are provided on the surface of the outer cover plate 2 and grooves are provided on the surface of the movable ring plate 4, so that the protrusions and grooves cooperate with each other. When the movable ring plate 4 moves along the width direction of the water channel 3, the movable ring plate 4 can be guided and limited by the protrusions, so that the movable ring plate 4 always remains parallel to the side wall of the water channel 3. This prevents the movable ring plate 4 from tilting or deviating during movement, which would affect the cleaning of the water channel 3 and the cooling effect on the synchronous motor.

[0052] In one embodiment of the present invention, a reinforcing plate 42 is installed inside the movable ring plate 4, and multiple sets of the reinforcing plate 42 are provided. The cross-sectional shape of the reinforcing plate 42 is H-shaped.

[0053] Because the movable ring plate 4 is elongated and slender, and the movable ring plates 4 in each water channel 3 are connected to each other by connecting rods 41, when the expansion bag 5 moves the movable ring plate 4 along the width of the water channel 3, each movable ring plate 4 is subjected to force at only one end. This makes it easy for the movable ring plate 4 to deform or bend, affecting the cleaning effect on the inner wall of the water channel 3. Therefore, a reinforcing plate 42 is installed inside the movable ring plate 4 to increase its strength and avoid or minimize the impact of deformation. The possibility of bending deformation when the ring plate 4 moves is reduced. At the same time, the cross-sectional shape of the reinforcing plate 42 is H-shaped to prevent the reinforcing plate 42 from twisting or deforming within the movable ring plate 4, which would affect the movement of the movable ring plate 4. Meanwhile, the function of the reinforcing plate 42 is to maintain high strength while keeping the movable ring plate 4 with a small thickness, to prevent bending deformation when the movable ring plate 4 moves, and to prevent the movable ring plate 4 from getting stuck in the water channel 3 after bending deformation, which would affect the normal operation of the water-cooled machine base, and to prevent affecting the normal and stable operation of the synchronous motor.

[0054] In one embodiment of the present invention, an elastic rod 153 is installed inside the side wall of the elastic sleeve 152, and the elastic rod 153 drives the elastic sleeve 152 to approach the inner wall of the water outlet pipe 14.

[0055] A magnetic block 154 is installed at the end of the elastic sleeve 152 away from the fixed ring 15. There is a magnetic attraction between the magnetic block 154 and the water outlet pipe 14. An attraction groove is opened on the inner wall of the water outlet pipe 14. The magnetic block 154 is stuck into the attraction groove under the action of magnetic attraction.

[0056] The fixing rod 151 is located on the periphery of the elastic sleeve 152;

[0057] Since the elastic sleeve 152 is inserted into the outlet pipe 14, and when the cooling water flows in reverse, the cooling water will be flushed into the elastic sleeve 152 from the outlet pipe 14. During this process, the cooling water flowing out of the outlet pipe 14 will impact the end of the elastic sleeve 152 inserted into the outlet pipe 14. By installing the elastic rod 153 in the side wall of the elastic sleeve 152, the outer wall of the elastic sleeve 152 is pressed tightly against the inner wall of the outlet pipe 14 under the elastic force of the elastic rod 153 and the pressure of the cooling water in the outlet pipe 14. This prevents the end of the elastic sleeve 152 located in the outlet pipe 14 from being deformed by the water flow impact and prevents gaps from being generated between the outer wall of the elastic sleeve 152 and the inner wall of the outlet pipe 14. This causes the cooling water to be discharged from the gaps, resulting in a relatively small amount of cooling water entering the expansion bag 5. This, in turn, affects the pushing of the expansion bag 5 on the movable ring plate 4 and the cleaning effect of the movable ring plate 4 on the inner wall of the water channel 3.

[0058] Meanwhile, due to the relatively high pressure and flow rate of the cooling water, the impact force of the cooling water on the end of the elastic sleeve 152 located inside the outlet pipe 14 is relatively large. A magnetic block 154 is installed on the end of the elastic sleeve 152, and an attraction groove is opened on the inner wall of the outlet pipe 14 so that the magnetic block 154 can be inserted into the attraction groove. This improves the tightness between the elastic sleeve 152 and the outlet pipe 14 when the cooling water flows in reverse and drives the movable ring plate 4 to clean the water channel 3. This ensures that when the cooling water flows in reverse, the cooling water can fully enter the expansion bag 5 and ensure that the expansion bag 5 is fully inflated, driving the movable ring plate 4 to move in the water channel 3 and clean the inner wall of the water channel 3.

[0059] In one embodiment of the present invention, the height of the protrusion is greater than the depth of the groove, the width of the movable ring plate 4 is greater than the depth of the water channel 3, and the movable ring plate 4 is installed between the outer cover plate 2 and the water channel 3 by interference fit.

[0060] Since the height of the protrusion is greater than the depth of the groove, after the outer cover plate 2 is installed on the water jacket core 1, the outer cover plate 2 will exert a squeezing effect on the groove through the protrusion. That is, the fit between the movable ring plate 4 and the outer cover plate 2 and the water channel 3 is an interference fit, thereby fully ensuring the contact between the movable ring plate 4 and the inner wall of the water channel 3, and between the movable ring plate 4 and the outer cover plate 2. This ensures the cleaning effect of the movable ring plate 4 on the inner wall of the water channel 3 when it moves, avoids the accumulation of scale and impurities in the water channel 3, extends the maintenance cycle of the water-cooled base, improves the heat dissipation and cooling effect, and ensures the normal and stable operation of the synchronous motor.

[0061] In one embodiment of the present invention, a deformable layer 43 is installed on the surface of the movable ring plate 4, and a cavity is formed in the deformable layer 43. The cavity is filled with a moving liquid, and the volume of the moving liquid expands as the temperature rises.

[0062] When the synchronous motor operates at high power for a long time and generates a lot of heat, the temperature of the deformable layer 43 on the movable ring plate 4 will also rise. At this time, the movable liquid made of alcohol and water filling the cavity in the deformable layer 43 will expand when heated, causing the deformable layer 43 to expand and bulge. This increases the space occupied by the movable ring plate 4 in the water channel 3, that is, the space for cooling water to flow in the water channel 3 is relatively reduced. At this time, with the pressure of the external circulating pump delivering cooling water unchanged, the flow speed of the cooling water in the water channel 3 is relatively faster, so that the cooling water flows through the water-cooled base relatively quickly, carrying away the heat generated by the synchronous motor during operation and improving the heat dissipation and cooling effect of the synchronous motor.

[0063] Meanwhile, after the deformable layer 43 on the movable ring plate 4 bulges, the cross-section of the movable ring plate 4 and the deformable layer 43 occupies a relatively large area within the cross-section of the water channel 3. This makes the cross-sectional diameter of the water channel 3 for cooling water to pass through relatively small, which facilitates sufficient heat exchange between the cooling water and the water channel 3. It also prevents the cooling water near the middle of the cross-section from being blocked by the cooling water near the outer layer of the cross-section when the cross-sectional diameter of the cooling water in the water channel 3 is large, thus preventing it from quickly and smoothly exchanging heat with the water channel. This promotes the heat exchange between the cooling water and the water channel 3, improves the heat dissipation and cooling effect on the synchronous motor, and ensures the normal and stable operation of the synchronous motor.

[0064] In one embodiment of the present invention, the width of the deformable layer 43 is smaller than the width of the movable ring plate 4;

[0065] Since the width of the deformable layer 43 is smaller than the width of the movable ring plate 4, when the deformable layer 43 expands and bulges, the deformable layer 43 will bulge outward from the surface of the movable ring plate 4, and the surface of the bulging part is arc-shaped, thereby reducing the area of ​​the deformable layer 43 in contact with the inner wall of the water channel 3, avoiding the reduction or excessive reduction of the contact area between the cooling water and the inner wall of the water channel 3, ensuring the heat exchange between the cooling water and the water channel 3, and improving the heat dissipation and cooling effect of the synchronous motor.

[0066] Meanwhile, since the width of the deformable layer 43 is smaller than the width of the movable ring plate 4, when the deformable layer 43 expands and deforms due to heat, the deformable layer 43 will not contact or block the edge of the movable ring plate 4, thus avoiding the deformable layer 43 from hindering the movement of the movable ring plate 4 and affecting the cleaning effect of the movable ring plate 4 on the inner wall of the water channel 3.

[0067] As one embodiment of the present invention, the position of the water channel 3 on the surface of the water jacket core 1 includes several types: the water channel 3 is disposed on the outer surface of the water jacket core 1, the water channel 3 is disposed on the inner surface of the water jacket core 1, and the water channel 3 is disposed on both the outer surface and the inner surface of the water jacket core 1.

[0068] In practical applications, the amount of heat dissipated by the synchronous motor during operation is determined and judged based on the installation and operating environment of the synchronous motor and the average power of the synchronous motor during operation. When the synchronous motor generates a lot of heat and the heat is not easy to dissipate, water channels 3 are set on both the inner and outer surfaces of the water jacket core 1 to fully increase the area of ​​the water channels 3 on the water-cooled base and the contact area between the cooling water and the water channels 3, thereby improving the heat dissipation and cooling effect on the synchronous motor. When the synchronous motor generates a small amount of heat and the heat is easy to dissipate, water channels 3 are set on the outer surface of the water jacket core 1 to ensure the heat dissipation effect and reduce the heat dissipation energy consumption. When the synchronous motor generates a lot of heat and the heat is easy to dissipate, water channels 3 are set on the inner surface of the water jacket core 1 to reduce the distance between the cooling water and the heat-generating components inside the synchronous motor and the heat transfer distance, so as to facilitate the heat exchange between the heat and the cooling water, thereby balancing the heat dissipation energy consumption and the heat dissipation effect.

[0069] The specific workflow is as follows:

[0070] When a multi-pole synchronous motor is running, the heat generated by the motor is quickly dissipated through a water-cooled base.

[0071] External cooling water is pumped into the water channel 3 from the inlet pipe 13 by a circulating pump. The cooling water flows to the outlet pipe 14 in the water channel 3 and is discharged from the outlet pipe 14, so that the cooling water carries away the heat generated during the operation of the motor. At the same time, the direction of the cooling water flowing from the inlet pipe 13 to the outlet pipe 14 in the water channel 3 is defined as the positive direction of the cooling water flow.

[0072] After the synchronous motor has been running for a long time, impurities or scale may accumulate in the water channel 3. A movable ring plate 4 is installed in the water channel 3 to clean and scrape the inner wall of the water channel 3 by moving the movable ring plate 4.

[0073] By controlling the external circulation pump, the circulation pump drives the cooling water to flow in reverse at fixed intervals. At this time, the cooling water enters the water channel 3 from the outlet pipe 14. Since the outlet pipe 14 is equipped with a connecting bag 51 and an expansion bag 5, the reverse-flowing cooling water fills the expansion bag 5, causing the volume of the expansion bag 5 to gradually increase. The bulging expansion bag 5 pushes the movable ring plate 4, causing the movable ring plate 4 to move in the width direction in the water channel 3, scraping and cleaning the inner wall of the water channel 3. At the same time, since the expansion bag 5 and the connecting bag 51 have micro-holes, the cooling water flowing in reverse in the outlet pipe 14 fills the expansion bag 5, causing the expansion bag 5 to bulge. The cooling water in the expansion bag 5 flows out from the micro-holes into the water channel 3 and flows in reverse along the water channel 3 to the inlet pipe 13 for discharge.

[0074] Because an elastic sleeve 152 is installed at the outlet pipe 14 and is inserted into the outlet pipe 14, when the cooling water flows in the forward direction, the cooling water flows from the water channel 3 into the outlet pipe 14. At this time, the pressure in the water channel 3 is relatively greater than the pressure in the outlet pipe 14, causing the elastic sleeve 152 to deform under pressure. This creates a gap between the outer wall of the elastic sleeve 152 and the inner wall of the outlet pipe 14, facilitating the entry of cooling water from the water channel 3 into the outlet pipe 14. Simultaneously, when the cooling water flows in the reverse direction... When the water flows in the forward direction, the pressure in the outlet pipe 14 is greater than the pressure in the water channel 3. After the inner wall of the elastic sleeve 152 is subjected to pressure, the outer wall of the elastic sleeve 152 is pressed tightly against the inner wall of the outlet pipe 14, thereby causing the cooling water in the outlet pipe 14 to be discharged from the elastic sleeve 152 and further enter the connecting bag 51 and the expansion bag 5. At the same time, after the cooling water resumes the forward flow, the movable ring plate 4 will return to its original position under the impact of the cooling water in the water channel 3 and the elastic force of the expansion bag 5 contraction.

[0075] A protrusion is provided on the surface of the outer cover plate 2 and a groove is provided on the surface of the movable ring plate 4, so that the protrusion and the groove cooperate with each other, so that when the movable ring plate 4 moves along the width direction of the water channel 3, the movable ring plate 4 can be guided and limited by the protrusion, so that the movable ring plate 4 always remains parallel to the side wall of the water channel 3.

[0076] Since the movable ring plate 4 is slender and the movable ring plates 4 in each water channel 3 are connected to each other by connecting rods 41, when the expansion bag 5 moves the movable ring plate 4 along the width direction of the water channel 3, for a single movable ring plate 4, the force is applied to one end, which can easily cause the movable ring plate 4 to deform and bend. Therefore, a reinforcing plate 42 is provided inside the movable ring plate 4 to improve the strength of the movable ring plate 4. At the same time, the cross-sectional shape of the reinforcing plate 42 is H-shaped. The function of the reinforcing plate 42 is to enable the movable ring plate 4 to have high strength while maintaining a small thickness.

[0077] Since the elastic sleeve 152 is inserted into the outlet pipe 14, and when the cooling water flows in reverse, the cooling water flowing out of the outlet pipe 14 will impact the end of the elastic sleeve 152 inserted into the outlet pipe 14. By installing an elastic rod 153 in the side wall of the elastic sleeve 152, the outer wall of the elastic sleeve 152 is pressed tightly against the inner wall of the outlet pipe 14 under the action of the elastic force of the elastic rod 153 and the cooling water pressure in the outlet pipe 14.

[0078] Meanwhile, due to the relatively high pressure and flow rate of the cooling water, the impact force of the cooling water on the end of the elastic sleeve 152 located inside the outlet pipe 14 is relatively large. A magnetic block 154 is installed on the end of the elastic sleeve 152, and an attraction groove is opened on the inner wall of the outlet pipe 14 so that the magnetic block 154 is inserted into the attraction groove, making the elastic sleeve 152 and the outlet pipe 14 fit tightly.

[0079] Since the height of the protrusion is greater than the depth of the groove, after the outer cover plate 2 is installed on the water jacket core 1, the outer cover plate 2 will exert a squeezing effect on the groove through the protrusion. That is, the fit between the movable ring plate 4 and the outer cover plate 2 and the water channel 3 is an interference fit, which ensures the contact between the movable ring plate 4 and the inner wall of the water channel 3, and between the movable ring plate 4 and the outer cover plate 2.

[0080] When the synchronous motor operates at high power for a long time and generates a lot of heat, the temperature of the deformable layer 43 on the movable ring plate 4 will also rise. At this time, the movable liquid made of alcohol and water filling the cavity in the deformable layer 43 will expand when heated, causing the deformable layer 43 to expand and bulge. This increases the space occupied by the movable ring plate 4 in the water channel 3, which means that the space for cooling water to flow in the water channel 3 is relatively reduced. At this time, with the pressure of the external circulating pump delivering cooling water unchanged, the flow speed of the cooling water in the water channel 3 is relatively faster, so that the cooling water flows through the water-cooled base relatively quickly, carrying away the heat generated by the synchronous motor during operation and preventing the cooling water after the temperature rise from staying in the water channel for too long.

[0081] Since the width of the deformable layer 43 is smaller than the width of the movable ring plate 4, when the deformable layer 43 expands and bulges, the deformable layer 43 will bulge outward from the surface of the movable ring plate 4, and the surface of the bulging part is arc-shaped, reducing the area of ​​the deformable layer 43 in contact with the inner wall of the water channel 3.

[0082] Meanwhile, since the width of the deformable layer 43 is smaller than the width of the movable ring plate 4, when the deformable layer 43 expands and deforms due to heat, the deformable layer 43 will not contact or block the edge of the movable ring plate 4.

[0083] In practical applications, the amount of heat dissipated by the synchronous motor during operation is determined and judged based on the installation and operating environment of the synchronous motor and the average power of the synchronous motor during operation. When the synchronous motor generates a lot of heat and the heat is not easy to dissipate, water channels 3 are set on both the inner and outer surfaces of the water jacket core 1 to fully increase the area of ​​the water channels 3 on the water-cooled base and the contact area between the cooling water and the water channels 3, thereby improving the heat dissipation and cooling effect on the synchronous motor. When the synchronous motor generates a small amount of heat and the heat is easy to dissipate, water channels 3 are set on the outer surface of the water jacket core 1 to ensure the heat dissipation effect and reduce the heat dissipation energy consumption. When the synchronous motor generates a lot of heat and the heat is easy to dissipate, water channels 3 are set on the inner surface of the water jacket core 1 to reduce the distance between the cooling water and the heat-generating components inside the synchronous motor and the heat transfer distance, so as to facilitate the heat exchange between the heat and the cooling water, thereby balancing the heat dissipation energy consumption and the heat dissipation effect.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-pole synchronous motor with a water-cooled frame, comprising a water-cooled frame, the water-cooled frame comprising a water jacket core (1), both ends of the water jacket core (1) being provided with end plates (11), a terminal box (12) being arranged on the water jacket core (1), and uniformly distributed water grooves (3) being arranged on the outer surface of the water jacket core (1), the water grooves (3) being provided with cover plates (2), and water inlet pipes (13) and water outlet pipes (14) being arranged on the cover plates (2). characterized in that The water jacket core (1) is provided with flow-through openings (31), the flow-through openings (31) connecting adjacent water grooves (3), and the water grooves (3) being provided with blocking blocks (32), the blocking blocks (32) and the flow-through openings (31) cooperating to divide the water grooves (3) into two parts connected in series, the liquid flowing in opposite directions in the two parts of the water grooves (3), and the liquid flowing in an S shape in each part of the water grooves (3). The water grooves (3) are provided with movable ring plates (4), the movable ring plates (4) being connected to each other by connecting rods (41), the ends of the movable ring plates (4) being close to the water outlet pipes (14), and the movable ring plates (4) and the side walls of the water grooves (3) being provided with expansion bags (5), the expansion bags (5) being provided with connecting bags (51), the water outlet pipes (14) being provided with fixed rods (151), the fixed rods (151) being provided with fixed rings (15), the fixed rings (15) being provided with elastic sleeves (152), and the elastic sleeves (152) being inserted into the water outlet pipes (14) away from the fixed rings (15). The surfaces of the expansion bags (5) and the connecting bags (51) are provided with micropores, and the expansion bags (5) push the movable ring plates (4) to move in the width direction of the water grooves (3) when the expansion bags (5) are inflated.

2. A multi-pole synchronous machine with a water-cooled frame according to claim 1, characterized in that: The cover plates (2) comprise upper plates (21) and lower plates (22), and the upper plates (21) and the lower plates (22) are respectively separated into two parts corresponding to the water grooves (3). The surfaces of the cover plates (2) are provided with protrusions, the movable ring plates (4) are provided with grooves, the protrusions are inserted into the grooves, and the lengths of the protrusions and the grooves are the same as the width of the water grooves (3).

3. A multi-pole synchronous machine with a water-cooled frame according to claim 1, characterized in that: The movable ring plates (4) are provided with reinforcing plates (42), the reinforcing plates (42) are provided in multiple groups, and the cross-sectional shape of the reinforcing plates (42) is H-shaped.

4. A multi-pole synchronous machine with a water-cooled frame according to claim 1, characterized in that: The side walls of the elastic sleeves (152) are provided with elastic rods (153), the elastic rods (153) drive the elastic sleeves (152) to be close to the inner walls of the water outlet pipes (14). One end of the elastic sleeves (152) away from the fixed rings (15) is provided with magnetic blocks (154), there is a magnetic attraction force between the magnetic blocks (154) and the water outlet pipes (14), the inner walls of the water outlet pipes (14) are provided with attraction grooves, and the magnetic blocks (154) are clamped into the attraction grooves under the action of the magnetic attraction force. The fixed rods (151) are located at the periphery of the elastic sleeves (152).

5. A multi-pole synchronous machine with a water-cooled frame according to claim 2, characterized in that: The height of the protrusion is greater than the depth of the groove, the width of the movable ring plate (4) is greater than the depth of the water channel (3), and the movable ring plate (4) is installed between the outer cover plate (2) and the water channel (3) through interference fit.

6. A multi-pole synchronous machine with a water-cooled frame according to claim 1, characterized in that: A deformation layer (43) is installed on the surface of the movable ring plate (4), a gap cavity is formed in the deformation layer (43), and movable liquid is filled in the gap cavity, and the volume of the movable liquid expands with the increase of temperature.

7. A multi-pole synchronous machine with a water-cooled frame according to claim 6, characterized in that: The width of the deformation layer (43) is less than the width of the movable ring plate (4).

8. A synchronous machine with a water-cooled frame according to any one of claims 1-7, characterized in that: The outer surface and the inner surface of the water jacket core (1) are provided with water channels (3).

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