An electric machine

Abstract

The utility model discloses a motor, including the pivot, the casing and the refrigeration pipe, the refrigeration piece and the heat conduction plate of inside and outside setting in the pivot and the casing between in proper order, the refrigeration pipe is around the outer periphery of the pivot, the two sides of refrigeration piece are equipped with refrigeration surface and the heat releasing surface respectively, and the refrigeration surface is opposite with the refrigeration pipe, and the heat releasing surface is contacted with the heat conduction plate, and the casing is fixed with a plurality of radiating fins. The pivot exchanges heat with the refrigerant in the refrigeration pipe, and the heat of the refrigerant after heat exchange is absorbed by the refrigeration surface of the refrigeration piece, realizing cooling to the pivot, the heat of the heat releasing surface of the refrigeration piece is conducted to the casing outside through the heat conduction plate and the radiating fin in proper order, avoiding temperature rise in the casing too high, so can reduce the risk of thermal deformation of the pivot due to high temperature, reduce the frequency of motor failure, effectively provide the working reliability of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor. Background Technology

[0002] In a three-phase asynchronous motor, the rotor speed is lower than the speed of the rotating magnetic field. The rotor windings generate electromotive force and current due to the relative motion between them and the magnetic field, and interact with the magnetic field to produce electromagnetic torque, thus achieving energy conversion. Compared to a single-phase asynchronous motor, a three-phase asynchronous motor has better operating performance.

[0003] Based on the rotor structure, three-phase asynchronous motors can be divided into two types: squirrel-cage and wound-rotor. Squirrel-cage asynchronous motors are simple in structure, reliable in operation, lightweight, and inexpensive, and are widely used, but their main disadvantage is the difficulty in speed regulation. Wound-rotor three-phase asynchronous motors have three-phase windings on both the rotor and stator, connected to an external rheostat via slip rings and brushes. Adjusting the resistance of the rheostat can improve the motor's starting performance and regulate its speed. Furthermore, the motor casing can withstand the explosion pressure of the internal explosive mixture and prevent the propagation of the explosion flame to the surrounding environment. The gaps, roughness, and lengths of the explosion-proof mating surfaces are strictly designed and processed to ensure reliable explosion-proof performance. In the high-temperature, high-dust environments of the metallurgical industry, they provide reliable power for equipment such as rolling mills, sintering machines, and blast furnace blowers.

[0004] Currently, when existing composite explosion-proof three-phase asynchronous motors operate in high-temperature environments, if the shaft is subjected to high temperatures, the shaft heat may be conducted into the motor's interior. High temperatures can cause thermal deformation of the shaft, leading to a decrease in the shaft's coaxiality, perpendicularity, and other precision, affecting the connection and transmission between the motor and other equipment, increasing vibration and noise during motor operation, and potentially causing friction and collision between the shaft and components such as the stator and rotor, damaging the motor's internal structure and affecting the operational reliability of the three-phase asynchronous motor. Utility Model Content

[0005] The purpose of this invention is to provide a motor in which a cooling pipe, a cooling fin, and a heat-conducting plate are added between the shaft and the housing, arranged sequentially from the inside out, to cool the shaft and the inside of the housing, thus solving the technical problem of poor reliability of existing motors.

[0006] To achieve the above objectives, this utility model provides a motor, including a rotating shaft, a housing, and a cooling pipe, a cooling plate, and a heat-conducting plate arranged sequentially from the inside to the outside between the rotating shaft and the housing. The cooling pipe is arranged around the outer periphery of the rotating shaft. The cooling plate has a cooling surface and a heat-dissipating surface on both sides, with the cooling surface facing the cooling pipe and the heat-dissipating surface in contact with the heat-conducting plate. The housing is fixedly provided with a number of heat dissipation fins.

[0007] In some embodiments, a plurality of circumferentially distributed support rods are fixed inside the housing, and the refrigeration pipes are spirally wound around all the support rods and fixed to the support rods.

[0008] In some embodiments, the cooling pipe does not contact the rotating shaft.

[0009] In some embodiments, both the cooling element and the heat-conducting plate are semi-circular, and the cooling element overlaps with the heat-conducting plate.

[0010] In some embodiments, the system further includes two bases fixedly connected to the housing, a fixedly mounted bracket, and two trays slidably inserted at both ends of the bracket. The two trays are fixedly connected to the two bases in a one-to-one correspondence. Along the axial direction of the rotating shaft, the bracket slides relative to the base under the support of the trays.

[0011] In some embodiments, the base includes a support plate and a connecting plate arranged at an angle, the support plate being fixedly connected to the housing, and the connecting plate being parallel to the support plate; the support plates of the two bases are arranged in a figure-eight shape.

[0012] In some embodiments, a connecting beam is fixed between the support plates of the two bases.

[0013] In some embodiments, the bracket includes several support beams arranged side by side and an integrally bent L-shaped plate at both ends of the support beams. A groove is formed between the L-shaped plate and the support beam, and the support plate is slidably engaged with the groove.

[0014] In some embodiments, the L-shaped plate is provided with a lower guide hole; the connecting plate is provided with an upper guide hole that communicates with the lower guide hole, and both the lower guide hole and the upper guide hole are oblong holes; the support plate is provided with a guide pin in an integral vertical manner, and the guide pin passes through the lower guide hole and the upper guide hole from bottom to top.

[0015] In some embodiments, at least one end of the connecting plate is integrally formed with a connecting ear, the connecting ear having a connecting hole; at least one end of the support plate is formed with a fixing ear, the fixing ear having a fixing hole; and a connecting bolt passing through the connecting hole and the fixing hole in sequence is also included, the connecting bolt being equipped with a lock nut.

[0016] Compared with the prior art, the present invention optimizes the structure of the motor by adding a cooling pipe, a cooling plate and a heat-conducting plate arranged sequentially from the inside to the outside between the rotating shaft and the housing. The cooling pipe is wrapped around the outer circumference of the rotating shaft. The cooling plate has a cooling surface and a heat-dissipating surface on both sides, with the cooling surface facing the cooling pipe and the heat-dissipating surface in contact with the heat-conducting plate. The housing is fixed with a number of heat dissipation fins.

[0017] On the one hand, the shaft exchanges heat with the refrigerant inside the cooling pipe. After the heat exchange, the heat of the refrigerant is absorbed by the cooling surface of the cooling plate, thereby cooling the shaft. On the other hand, the heat from the heat-dissipating surface of the cooling plate is conducted to the outside of the casing through the heat-conducting plate and the heat dissipation fins, preventing the temperature inside the casing from rising too high. This reduces the risk of thermal deformation of the shaft due to high temperature, reduces the frequency of motor failure, and effectively improves the reliability of the motor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 An isometric view of the motor provided in an embodiment of this utility model;

[0020] Figure 2 for Figure 1 Another axonometric drawing;

[0021] Figure 3 for Figure 1 Assembly diagram of the base, bracket, and support plate;

[0022] Figure 4 for Figure 1 Internal diagram of the middle casing;

[0023] Figure 5 for Figure 4 Exploded view;

[0024] Figure 6 for Figure 4 Cross-sectional view.

[0025] The attached figures are labeled as follows:

[0026] 1. Shaft; 2. Housing; 3. Refrigeration pipe; 4. Refrigeration plate; 5. Heat-conducting plate; 6. Support rod; 7. Base; 8. Bracket; 9. Support plate; and 10. Connecting bolts.

[0027] Heat dissipation fins 21;

[0028] Support plate 71, connecting plate 72, and connecting beam 73;

[0029] Upper guide hole 721, connecting lug 722 and connecting hole 723;

[0030] Support beam 81, L-shaped plate 82, and sliding groove 83;

[0031] Lower guide hole 821;

[0032] Guide pin 91, fixing ear 92 and fixing hole 93. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] This utility model discloses a motor, specifically a three-phase asynchronous motor. (See attached diagram) Figures 1 to 6 As shown, the motor includes a rotating shaft 1, a housing 2, a cooling pipe 3, a cooling plate 4, and a heat-conducting plate 5. The rotating shaft 1 is rotatably mounted inside the housing 2, and bearings are provided at both ends of the housing 2 to support the rotation of the rotating shaft 1. The housing 2 is cylindrical, and several heat dissipation fins 21 are fixedly mounted on the housing 2. All the heat dissipation fins 21 are radially distributed along the circumference of the housing 2 to increase the heat dissipation area of ​​the housing 2, so that the heat inside the housing 2 can be quickly dissipated through the heat dissipation fins 21, shortening the heat dissipation time and increasing the heat dissipation efficiency.

[0036] As attached Figures 4 to 6 As shown, the refrigeration pipe 3, refrigeration plate 4, and heat-conducting plate 5 are arranged sequentially from the inside to the outside between the rotating shaft 1 and the housing 2. "From the inside to the outside" in this text refers to the radial direction of the rotating shaft 1 from the inside to the outside of the housing 2. The refrigeration pipe 3 is wound around the outer circumference of the rotating shaft 1. The refrigeration plate 4 has a refrigeration surface and a heat-dissipating surface on both sides, with the refrigeration surface facing the refrigeration pipe 3. The rotating shaft 1 exchanges heat with the refrigerant inside the refrigeration pipe 3. After the heat exchange, the heat from the refrigerant is absorbed by the refrigeration surface of the refrigeration plate 4, thus cooling the rotating shaft 1.

[0037] The heat-dissipating surface is in contact with the heat-conducting plate 5. The heat from the heat-dissipating surface of the cooling chip 4 is conducted to the outside of the casing 2 through the heat-conducting plate 5 and the heat dissipation fins 21 in sequence, so as to avoid excessive temperature rise inside the casing 2.

[0038] This invention adds a cooling assembly consisting of a cooling pipe 3, a cooling plate 4, and a heat-conducting plate 5 between the rotating shaft 1 and the housing 2 to cool the interior of the rotating shaft 1 and the housing 2, thereby reducing the risk of thermal deformation of the rotating shaft 1 due to high temperature, reducing the frequency of motor failure, and effectively improving the reliability of the motor.

[0039] Several support rods 6 are fixedly installed inside the housing 2, evenly distributed radially along the circumference. At least one end of all support rods 6 extends to the outside of the housing 2, and the portions of all support rods 6 outside the housing 2 are integrally formed into a fixing sleeve, which is fixed to one end of the housing 2. The refrigeration pipe 3 is spirally wound around all the support rods 6, which extends the flow path of the refrigerant within the refrigeration pipe 3 and improves the heat exchange efficiency of the refrigerant. The refrigeration pipe 3 is fixed to the support rods 6, ensuring that the refrigeration pipe 3 remains fixed relative to the rotating shaft 1.

[0040] In a preferred embodiment, the cooling pipe 3 does not contact the rotating shaft 1. When the surface temperature of the cooling pipe 3 is lower than the dew point, condensation will be generated between the contact surfaces of the cooling pipe 3 and the rotating shaft 1. This avoids the long-term retention of condensation, which can lead to corrosion of the rotating shaft 1 and helps to extend the service life of the rotating shaft 1.

[0041] The cooler 4 is specifically a thermoelectric semiconductor cooling component that utilizes the Peltier effect to achieve cooling. Specifically, the cooler 4 is composed of P-type and N-type semiconductors. When a direct current passes through it, electrons flow from the P-type semiconductor to the N-type semiconductor, absorbing heat at the junction and forming a cooling surface. Conversely, electrons flow from the N-type semiconductor to the P-type semiconductor, releasing heat at the junction and forming a heat-releasing surface. Both the cooler 4 and the heat-conducting plate 5 are semi-circular rings, and the cooler 4 overlaps with the heat-conducting plate 5, increasing the heat conduction of the heat-conducting plate 5 and improving heat exchange efficiency.

[0042] As attached Figure 3 As shown, the motor also includes two bases 7, a bracket 8, and two support plates 9. The two bases 7 are fixedly connected to the housing 2. The bracket 8 is fixedly installed to stably support the motor with the help of the bases 7. The two support plates 9 are slidably inserted into both ends of the bracket 8. The two support plates 9 are fixedly connected to the two bases 7 one-to-one. Along the axial direction of the rotating shaft 1, the bracket 8 slides relative to the base 7 with the support of the support plates 9, which facilitates the positioning of the housing 2 during assembly.

[0043] The base 7 includes a support plate 71 and a connecting plate 72 arranged at an angle. The support plate 71 is fixedly connected to the housing 2 and is located between two adjacent heat dissipation fins 21. The connecting plate 72 is parallel to the support plate 71. The support plates 71 of the two bases 7 are arranged in a V-shape to ensure that the two bases 7 can stably support the motor.

[0044] A connecting beam 73 is fixed between the support plates 71 of the two bases 7, which can both constrain the two bases 7 and ensure that the two bases 7 can stably support the casing 2. Specifically, two connecting beams 73 are welded between the two bases 7, and the two connecting beams 73 are parallel to each other.

[0045] The bracket 8 includes several parallel support beams 81 and an integrally bent L-shaped plate 82 at both ends of the support beams 81. A groove 83 is formed between the L-shaped plate 82 and the support beams 81. The support plate 9 is slidably engaged with the groove 83 to support and guide the bracket 8 to slide relative to the base 7.

[0046] The L-shaped plate 82 is provided with a lower guide hole 821; the connecting plate 72 is provided with an upper guide hole 721 that communicates with the lower guide hole 821. Both the lower guide hole 821 and the upper guide hole 721 are oblong holes; the support plate 9 is provided with a guide pin 91 vertically in one piece. The guide pin 91 passes through the lower guide hole 821 and the upper guide hole 721 from bottom to top. Both the lower guide hole 821 and the upper guide hole 721 are slidably engaged with the guide pin 91 to guide the support 8 to slide relative to the base 7.

[0047] At least one end of the connecting plate 72 is integrally formed with a connecting ear 722, and the connecting ear 722 is provided with a connecting hole 723; at least one end of the support plate 9 is formed with a fixing ear 92, and the fixing ear 92 is provided with a fixing hole 93; the connecting hole 723 and the fixing hole 93 are coaxial threaded holes. The motor also includes a connecting bolt 10 that passes through the connecting hole 723 and the fixing hole 93 in sequence, and the connecting bolt 10 is equipped with a lock nut to fix the support plate 9 on the base 7.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electric motor, characterized in that, It includes a rotating shaft (1), a housing (2), and a cooling pipe (3), a cooling plate (4), and a heat-conducting plate (5) arranged sequentially from the inside to the outside between the rotating shaft (1) and the housing (2). The cooling pipe (3) is arranged around the outer periphery of the rotating shaft (1). The cooling plate (4) has a cooling surface and a heat-dissipating surface on both sides respectively. The cooling surface is opposite to the cooling pipe (3), and the heat-dissipating surface is in contact with the heat-conducting plate (5). The housing (2) is fixed with a number of heat dissipation fins (21).

2. The motor according to claim 1, characterized in that, The housing (2) is fixed with several circumferentially distributed support rods (6), and the refrigeration pipe (3) is wound around all the support rods (6) along a spiral line. The refrigeration pipe (3) is fixed to the support rods (6).

3. The motor according to claim 1, characterized in that, The refrigeration pipe (3) does not contact the rotating shaft (1).

4. The motor according to claim 1, characterized in that, The cooling chip (4) and the heat-conducting plate (5) are both semi-circular rings, and the cooling chip (4) overlaps with the heat-conducting plate (5).

5. The motor according to claim 1, characterized in that, It also includes two bases (7) fixedly connected to the housing (2), a fixed bracket (8) and two trays (9) that can be slidably inserted into both ends of the bracket (8). The two trays (9) are fixedly connected to the two bases (7) one by one. Along the axial direction of the rotating shaft (1), the bracket (8) slides relative to the base (7) under the support of the trays (9).

6. The motor according to claim 5, characterized in that, The base (7) includes a support plate (71) and a connecting plate (72) arranged at an angle. The support plate (71) is fixedly connected to the housing (2), and the connecting plate (72) is parallel to the support plate (71). The support plates (71) of the two bases (7) are arranged in a figure-eight shape.

7. The motor according to claim 6, characterized in that, A connecting beam (73) is fixed between the support plates (71) of the two bases (7).

8. The motor according to claim 6, characterized in that, The bracket (8) includes several support beams (81) arranged side by side and an L-shaped plate (82) integrally bent at both ends of the support beams (81). A groove (83) is formed between the L-shaped plate (82) and the support beams (81), and the support plate (9) is slidably engaged with the groove (83).

9. The motor according to claim 8, characterized in that, The L-shaped plate (82) is provided with a lower guide hole (821); the connecting plate (72) is provided with an upper guide hole (721) that communicates with the lower guide hole (821), and both the lower guide hole (821) and the upper guide hole (721) are waist-shaped holes; the support plate (9) is provided with a guide pin (91) vertically in an integral manner, and the guide pin (91) passes through the lower guide hole (821) and the upper guide hole (721) from bottom to top.

10. The motor according to claim 7, characterized in that, The connecting plate (72) has a connecting ear (722) integrally formed at at least one end, and the connecting ear (722) is provided with a connecting hole (723); the support plate (9) has a fixing ear (92) formed at at least one end, and the fixing ear (92) is provided with a fixing hole (93); it also includes a connecting bolt (10) that passes through the connecting hole (723) and the fixing hole (93) in sequence, and the connecting bolt (10) is provided with a lock nut.

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