Phase-change heat exchange motor

Abstract

The invention discloses a phase-change heat exchange motor, relates to the technical field of motors, and solves the problem that cooling liquid of a traditional phase-change heat exchange motor is unsmooth to flow and discharge after being gasified. An isolation sleeve is coaxially arranged in a stator core, the two ends of the isolation sleeve are connected with a machine base to form a motor stator chamber, and cooling liquid is arranged in the motor stator chamber; a rotor is coaxially arranged in the isolation sleeve and rotationally arranged on the machine base. A cooler is arranged on one side of the base; the cooler is communicated with the motor stator chamber; a stator winding is arranged on the iron core; the inner ring of the stator winding is provided with a slot wedge; a gap is formed between the slot wedge and the isolation sleeve; the iron core is provided with a radial ventilation slot plate, a short ventilation slot plate and a medium-short ventilation slot plate which are used for guiding gasified cooling liquid. According to the invention, the stator core is immersed in the cooling liquid, and the plurality of trough plates arranged on the stator core guide the gasified cooling liquid, so that the gasified cooling liquid can quickly float to the upper part of the motor stator chamber and flow into the cooler, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a phase-change heat-generating motor. Background Art

[0002] The main function of the motor is to generate driving torque and drive various machines. As a power source for electrical appliances or various machines, it is widely used in the field of electromechanics. The motor mainly consists of a stator and a rotor. During the operation of the motor, the stator and rotor will generate heat. When the temperature is too high, it is easy to cause damage or operation failure.

[0003] Traditional air-to-air cooling motors or air-to-water cooling motors use air as the primary cooling medium. The heat in the motor is transferred to the internal air through internal air circulation, and then transferred to the secondary cooling medium through external circulation to complete the heat dissipation of the motor. Since the air convection heat transfer coefficient is relatively low, a larger heat exchange area is required, resulting in an excessively large machine size.

[0004] Compared with the heat exchange method in which the primary cooling medium is air, the phase change heat exchange method has higher heat exchange efficiency and is conducive to reducing the size of the whole machine. However, the traditional phase change heat exchange motor often lacks special design considerations in structure, which is not conducive to the flow and discharge of the coolant after vaporization. The vaporized motor coolant flows through the cooler and flows back to the motor after re-liquefaction. Therefore, it is necessary to set up a cooler outside the motor, which requires additional placement space, thereby increasing the overall volume. Summary of the invention

[0005] In order to solve the above-mentioned problem that the coolant of the conventional phase-change heat exchange motor cannot flow smoothly after being vaporized, the present invention proposes a phase-change heat exchange motor. The present invention immerses the stator core in the coolant, and a plurality of slot plates arranged on the stator core guide the vaporized coolant, so that the vaporized coolant can be quickly discharged from the core part and float to the top of the motor stator chamber, and then flow into the cooler.

[0006] The present invention proposes a phase-changing heat-transfer motor, which specifically comprises a machine base, a rotor, an isolating sleeve, a stator core and a cooler. A plurality of support plates are arranged inside the machine base, the support plates support the stator core, and a flow-equalizing hole is arranged at the bottom of the support plate; an isolating sleeve is coaxially arranged inside the stator core, and two ends of the isolating sleeve are connected to the machine base through the isolating sleeve support to form a motor stator chamber, and a coolant is arranged in the motor stator chamber; a rotor is coaxially arranged inside the isolating sleeve, a bearing assembly is sleeved on the rotor shaft, an end plate is installed on the bearing assembly, and the end plate is connected to the machine base; a cooler is arranged on one side of the machine base; the cooler is connected to the stator chamber of the motor; the stator core comprises a stator winding and an iron core, and the stator winding is arranged on the iron core; a slot wedge is arranged on the inner ring of the stator winding, and a gap is arranged between the slot wedge and the isolating sleeve; a plurality of radial ventilation slot plates, a plurality of short ventilation slot plates and a plurality of medium-short ventilation slot plates are arranged on the iron core to guide the vaporized coolant.

[0007] Furthermore, the base also includes a plurality of guide plates and a top plate, wherein the top plate is obliquely arranged on the top of the base as a whole; the plurality of guide plates are equidistantly and vertically arranged on the lower surface of the top plate, and the length direction of the guide plates is arranged along the axial direction of the rotor.

[0008] Furthermore, the upper end of the support plate is hollowed out, and a gap is provided between the top and the top plate.

[0009] Furthermore, an overflow port is provided at the upper end of the machine base, and the overflow port is connected to a safety valve.

[0010] Furthermore, a drain port is provided at the bottom of the base.

[0011] Furthermore, a cooling chamber is provided in the cooler, the upper end of the cooling chamber is connected to the motor stator chamber through the inflow hole, and the lower end is connected to the return liquid pump through the reflux hole 2; the return liquid pump is connected to the motor stator chamber through the reflux hole 1; and a plurality of cooling pipes are provided in the cooling chamber.

[0012] Furthermore, the cooling pipe is a serpentine structure pipe.

[0013] Furthermore, a plurality of flow partitions are arranged in the cooling chamber to form a serpentine flow channel in the cooling chamber.

[0014] Furthermore, a gas-liquid separator is provided between the second reflux hole and the liquid return pump.

[0015] Furthermore, a maintenance side panel is provided at the lower end of the cooler.

[0016] The beneficial effects of the phase-change heat-generating motor described in the present invention are:

[0017] (1) The phase-change heat exchange motor of the present invention overcomes the problem of poor flow and discharge of the coolant after vaporization in conventional phase-change heat exchange motors. By immersing the stator core in the coolant and providing a plurality of radial ventilation slots, a plurality of short ventilation slots and a plurality of medium-short ventilation slots on the core, the vaporized coolant can be quickly discharged from the inside of the core, thereby improving the heat exchange efficiency.

[0018] (2) The phase-change heat transfer motor of the present invention integrates the cooler and the motor, liquefies the gaseous coolant in time and flows it back to the stator chamber of the motor, and has a more compact structure, which effectively improves the power density and operation stability of the motor; and, since the phase-change heat transfer motor can operate at a lower temperature, the loss inside the motor is reduced;

[0019] (3) The phase-change heat transfer motor described in the present invention allows the vaporized coolant to flow toward the cooler through the inclined top plate and a plurality of guide plates on the upper section of the motor stator chamber, thereby improving the coolant circulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] In the attached picture:

[0022] Figure 1 It is a cross-sectional view of the motor structure of a phase-change heat-generating motor according to the present invention;

[0023] Figure 2 The present invention is a phase change heat transfer motor Figure 1 Sectional view at AA in the middle;

[0024] Figure 3 The present invention is a phase change heat transfer motor Figure 2 A partial enlarged view of point I in the middle;

[0025] Figure 4 It is a cross-sectional view of the motor structure of a phase-change heat-generating motor according to the present invention;

[0026] Among them: 1- base, 1a- support plate, 1b- guide plate, 1c- overflow port, 1d- guide hole, 1e- exhaust hole, 1f- reflux hole 1, 1g- drainage port, 1h- flow equalization hole, 1j- top plate, 2- isolation sleeve left support, 3- left end cover, 4- bearing assembly 1, 5- rotor, 6- isolation sleeve, 7- stator core, 7a- stator winding, 7b- core, 7c- slot wedge, 7d- radial ventilation slot plate, 7e- short pass Wind slot plate, 7f-medium and short ventilation slot plate, 8-cooler, 8a-connecting plate, 8b-inflow hole, 8c-cooling water drain outlet, 8d-flow partition plate, 8e-cooling pipe, 8f-cooling water inlet, 8g-return hole 2, 8h-maintenance side plate, 8j-support, 8k-auxiliary support, 9-gas-liquid separator, 10-return liquid pump, 11-right support of isolation sleeve, 12-right end cover, 13-bearing assembly 2, 14-motor stator chamber. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Specific implementation method 1: See Figure 1-Figure 4 The present embodiment is described in detail. A phase-change heat-transfer motor described in the present embodiment specifically includes a base 1, a rotor 5, an isolation sleeve 6, a stator core 7 and a cooler 8. A plurality of support plates 1a are arranged inside the base 1, and the support plates 1a support the stator core 7. A flow-equalizing hole 1h is arranged at the bottom of the support plate 1a to ensure that the coolant level in the motor is consistent; an isolation sleeve 6 is coaxially arranged inside the stator core 7, and both ends of the isolation sleeve 6 are connected to the base 1 through the isolation sleeve left support 2 and the isolation sleeve right support 11 to form a motor stator chamber 14, and the motor stator chamber 14 is provided with coolant; a rotor 5 is coaxially arranged inside the isolation sleeve 6, and a bearing assembly 1 4 and a bearing assembly 2 13 are sleeved on the rotating shaft of the rotor 5, and a bearing assembly 1 4 is installed with a bolt. The left end plate 3 and the right end plate 12 are installed on the bearing assembly 13 by bolts. The left end plate 3 and the right end plate 12 are connected to the base 1 by bolts to support the rotor 5. A cooler 8 is arranged on one side of the base 1. The coolant vaporized after heat exchange with the stator core 7 in the motor stator chamber 14 enters the cooler 8 and liquefies and then flows back to the motor stator chamber 14. A plurality of exhaust holes 1e are arranged on the upper end of the base 1, and a reflux hole 1f is arranged on the lower end. The cooler 8 is connected with the motor stator chamber 14 through the exhaust holes 1e and the reflux hole 1f. The vaporized coolant enters the cooler 8 from the exhaust holes 1e, and returns to the inside of the motor stator chamber 14 from the reflux hole 1f after reliquefaction. A check valve is arranged at the reflux hole 1f.

[0032] The base 1 further includes a plurality of guide plates 1b and a top plate 1j, and the top plate 1j is tiltedly arranged on the top of the base 1 as a whole. Figure 1 As shown, the top plate 1j gradually rises from left to right, which helps to guide the vaporized motor coolant to flow to the exhaust hole 1e; a number of guide plates 1b are equidistant and vertically arranged on the lower surface of the top plate 1j, and the length direction of the guide plates 1b is arranged along the axial direction of the rotor 5.

[0033] The upper end of the support plate 1a is hollowed out, and a gap is set between the top and the top plate 1j. The gap forms a plurality of guide holes 1d under the division of a plurality of guide plates 1b. The top plate 1j and the guide holes 1d jointly assist the flow of the vaporized coolant.

[0034] An overflow port 1c is provided at the upper end of the base 1, and the overflow port 1c is connected to the safety valve. When the internal pressure of the motor exceeds the safety limit threshold, the overflow port 1c opens to complete the pressure relief, and the motor is in a closed state when working normally.

[0035] The bottom of the base 1 is provided with a drain port 1g, which is located at the lowest position of the liquid level in the motor stator chamber 14. When the drain port 1g is opened, all the motor coolant in the motor stator chamber 14 can be discharged. When the motor is working normally, it is in a closed state.

[0036] The left support 2 of the isolation sleeve and the right support 11 of the isolation sleeve are installed on the machine base 1 and fixed by bolts. Sealing measures such as sealant, rubber body or interference fit are adopted between the contact surfaces. The left support 2 of the isolation sleeve and the right support 11 of the isolation sleeve are connected to the isolation sleeve 6. Sealing measures such as sealant, rubber body or interference fit are adopted between the contact surfaces.

[0037] The stator core 7 includes a stator winding 7a and an iron core 7b. The stator winding 7a is arranged on the iron core 7b. The outer surface of the iron core 7b is specially surface treated to form fine dents on the surface, which is conducive to the uniform formation of bubbles of the motor coolant. The inner ring of the stator winding 7a is provided with a slot wedge 7c, and a gap is provided between the slot wedge 7c and the isolation sleeve 6. The iron core 7b is provided with a plurality of radial ventilation slot plates 7d, a plurality of short ventilation slot plates 7e and a plurality of medium and short ventilation slot plates 7f to guide the vaporized coolant. Figure 2 As shown, a plurality of radial ventilation slots 7d are arranged in the upper quarter area and the lower quarter area of ​​the iron core 7b, and the radial ventilation slots 7d are arranged at the gap position of the stator winding 7a; a plurality of short ventilation slots 7e are arranged in the left quarter area and the right quarter area of ​​the iron core 7b, and are arranged at the gap position of the stator winding 7a; a plurality of medium and short ventilation slots 7f are arranged in the left quarter area and the right quarter area of ​​the iron core 7b, and are located on the outside of the stator winding 7a; the vaporized coolant is guided to the top of the motor stator chamber 14 by the plurality of radial ventilation slots 7d, the plurality of short ventilation slots 7e and the plurality of medium and short ventilation slots 7f.

[0038] A cooling chamber is provided in the cooler 8, the upper end of the cooling chamber is connected to the motor stator chamber 14 through the inflow hole 8b, and the lower end is connected to the liquid return pump 10 through the reflux hole 8g; the number of inflow holes 8b is consistent with the number of exhaust holes 1e; the liquid return pump 10 is connected to the motor stator chamber 14 through the reflux hole 1f; a plurality of cooling pipes 8e with a serpentine structure are provided in the cooling chamber, the cross-section of the cooling pipe 8e is elliptical, and the outer side has structures such as ribs for enhancing heat exchange; the lower end of the cooling pipe 8e is connected to the cooling water inlet 8f, and the upper end is connected to the cooling water outlet 8c. The cooling water flows from bottom to top in the cooling pipe 8e, and the gaseous motor coolant flows through the outside of the cooling pipe 8e, which fully exchanges heat with the gaseous coolant, reduces the temperature of the motor coolant, and liquefies the motor coolant. A connecting plate 8a is provided at the end of the inflow hole 8b, and the upper end of the cooler 8 is connected to the base 1 through the connecting plate 8a; the middle and lower ends of the cooler 8 are connected to the base 1 through the support 8j, and the support 8j is used for the axial positioning of the cooler 8; the bottom of the cooler 8 is also provided with an auxiliary support 8k, and the auxiliary support 8k is used for the auxiliary positioning of the cooler 8 in the vertical direction. Several flow partitions 8d are arranged at equal intervals in the cooling chamber to form a serpentine flow channel in the cooling chamber, which effectively increases the heat exchange path length of the gasified motor coolant and helps to improve the heat exchange efficiency. A gas-liquid separator 9 is provided between the reflux hole 8g and the return liquid pump 10, and the gas-liquid separator 9 is used to separate the gaseous motor coolant and prevent the gaseous motor coolant from entering the return liquid pump 10. An inspection side plate 8h is provided at the lower end of the cooler 8, and the inspection side plate 8h can be removed when necessary to facilitate the inspection of the gas-liquid separator 9 and the return liquid pump 10.

[0039] The specific working process of a phase-change heat-generating motor described in the present invention is as follows:

[0040] Before the motor is running, the motor coolant is filled into the motor stator chamber 14, so that the liquid level is higher than the stator core 7 with windings, lower than the exhaust hole 1e, and a distance is left from the exhaust hole 1e. Cooling water is introduced into the cooling water inlet 8f. When the motor is running, the stator winding 7a and the core 7b are the main heat-generating components. After the motor coolant is heated, a phase change occurs, from liquid to gas, and bubbles continuously appear on the surface of the heat-generating components.

[0041] The bubbles formed by the stator winding 7a and the iron core 7b located in the upper area flow upward along the radial ventilation slot plate 7d and gather above the liquid level in the motor stator chamber 14. The bubbles formed by the stator winding 7a and the iron core 7b located in the left and right areas flow upward along the short ventilation slot plate 7e or the medium-short ventilation slot plate 7f and gather above the liquid level in the motor stator chamber 14. The bubbles formed by the stator winding 7a and the iron core 7b located in the lower and lower areas flow upward along the radial ventilation slot plate 7d, then flow upward along the channel formed between the isolation sleeve 6 and the slot wedge 7c, merge with the bubbles formed in the left and right areas, and finally gather above the liquid level in the motor stator chamber 14.

[0042] The vaporized motor coolant flows along the guide plate 1b and the guide hole 1d to the exhaust hole 1e, and the exhaust hole 1e is connected with the inlet hole 8b, and then flows into the cooler 8 from the inlet hole 8b, flows through the outside of the cooling pipe 8e, completes the heat exchange, and re-liquefies the vaporized motor coolant into a liquid state. The liquid motor coolant flows out of the cooler 8 from the reflux hole 8g, enters the gas-liquid separator 9 along the pipeline, separates the gaseous motor coolant, and the liquid motor coolant is pumped back into the motor stator chamber 14 by the return liquid pump 10 through the reflux hole 1f, completing the circulation of the motor coolant.

[0043] During assembly, first, install the stator core 7 with winding into the base 1, install the left side of the isolation sleeve 6 into the isolation sleeve left support 2, and then assemble it as a whole onto the base 1, install the isolation sleeve right support 11 onto the base 1, and complete the connection between the isolation sleeve right support 11 and the isolation sleeve 6. In this way, the motor stator chamber 14 is formed between the base 1, the isolation sleeve left support 2, the isolation sleeve 6 and the isolation sleeve right support 11. Then, install the bearing assembly 4 and the bearing assembly 13 onto the rotor 5, place the above-mentioned whole inside the motor, install the left end cover 3 and the right end cover 12 onto the base 1, and then connect and fix the bearing assembly 1 4 with the left end cover 3, and connect and fix the bearing assembly 2 13 with the right end cover 12. In this way, the motor body is assembled. Finally, install the gas-liquid separator 9 and the liquid return pump 10 to the lower end of the cooler 8, and then install the above-mentioned whole onto the base 1. In this way, the whole machine is assembled.

[0044] To summarize the above implementation cases, a phase-change heat-transfer motor described in the present invention overcomes the problem of poor flow and discharge of coolant after vaporization in traditional phase-change heat-transfer motors. By immersing the stator core 7 in the coolant and arranging a plurality of radial ventilation slots 7d, a plurality of short ventilation slots 7e and a plurality of medium-short ventilation slots 7f on the core 7b, the vaporized coolant can be quickly discharged from the inside of the core 7b, thereby improving the heat exchange efficiency; a phase-change heat-transfer motor described in the present invention integrates the cooler 8 and the motor, liquefies the gaseous coolant in time and flows it back to the motor stator chamber 14, and has a more compact structure, which effectively improves the power density and operation stability of the motor; and, since the phase-change heat-transfer motor can operate at a lower temperature, the loss inside the motor is reduced; a phase-change heat-transfer motor described in the present invention allows the vaporized coolant to flow toward the cooler 8 through the top plate 1j and a plurality of guide plates 1b inclined at the upper section of the motor stator chamber 14, thereby improving the coolant circulation efficiency.

[0045] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A phase change heat generator, characterized in that: The invention comprises a machine base (1), a rotor (5), an isolating sleeve (6), a stator core (7) and a cooler (8); a plurality of support plates (1a) are arranged inside the machine base (1); the support plates (1a) support the stator core (7); and a flow-balancing hole (1h) is arranged at the bottom of the support plates (1a); an isolating sleeve (6) is coaxially arranged inside the stator core (7); two ends of the isolating sleeve (6) are connected to the machine base (1) through the isolating sleeve support to form a motor stator chamber (14); and a coolant is arranged in the motor stator chamber (14); a rotor (5) is coaxially arranged inside the isolating sleeve (6); a bearing assembly is sleeved on the rotating shaft of the rotor (5); an end plate is installed on the bearing assembly, and the end plate is connected to the machine base (1); a cooler (8) is arranged on one side of the machine base (1); and the cooler (8) is connected to the motor stator chamber (14); The stator iron core (7) comprises a stator winding (7a) and an iron core (7b), wherein the stator winding (7a) is arranged on the iron core (7b); a slot wedge (7c) is arranged on the inner ring of the stator winding (7a), and a gap is arranged between the slot wedge (7c) and the isolation sleeve (6); and a plurality of radial ventilation slot plates (7d), a plurality of short ventilation slot plates (7e) and a plurality of medium-short ventilation slot plates (7f) are arranged on the iron core (7b) to guide the vaporized cooling liquid.

2. The phase change heat generator according to claim 1, characterized in that: The machine base (1) further comprises a plurality of guide plates (1b) and a top plate (1j), wherein the top plate (1j) is arranged obliquely on the top of the machine base (1) as a whole; the plurality of guide plates (1b) are arranged equidistantly and vertically on the lower surface of the top plate (1j), and the length direction of the guide plates (1b) is arranged along the axial direction of the rotor (5).

3. The phase change heat generator according to claim 2, characterized in that: The upper end of the support plate (1a) is hollowed out, and a gap is provided between the top and the top plate (1j).

4. The phase change heat generator according to claim 1, characterized in that: An overflow port (1c) is provided at the upper end of the machine base (1), and the overflow port (1c) is connected to a safety valve.

5. The phase change heat generator according to claim 1, characterized in that: The bottom of the machine base (1) is provided with a liquid discharge port (1g).

6. The phase change heat generator according to claim 1, characterized in that: The cooler (8) is provided with a cooling chamber, the upper end of the cooling chamber is connected to the motor stator chamber (14) through an inflow hole (8b), and the lower end is connected to a liquid return pump (10) through a second return hole (8g); the liquid return pump (10) is connected to the motor stator chamber (14) through a first return hole (1f); and a plurality of cooling pipes (8e) are provided in the cooling chamber.

7. The phase change heat generator according to claim 6, characterized in that: The cooling pipe (8e) is a serpentine structure pipe.

8. The phase change heat generator according to claim 6, characterized in that: A plurality of flow partitions (8d) are arranged in the cooling chamber to form a serpentine flow channel in the cooling chamber.

9. The phase change heat generator according to claim 6, characterized in that: A gas-liquid separator (9) is provided between the second reflux hole (8g) and the liquid return pump (10).

10. The phase change heat generator according to claim 6, characterized in that: The lower end of the cooler (8) is provided with an inspection side plate (8h).

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