A three-phase asynchronous motor

Abstract

This application relates to the technical field of motor equipment, and in particular to a three-phase asynchronous motor, including a body, an isolation cover provided outside the body, the isolation cover having multiple rotating fins, the free ends of the rotating fins forming a cooling air duct communicating with the body after moving away from the outer wall of the body, a cooling fan rotatably mounted on the lower side of the body, the air inlet of the cooling fan communicating with the cooling air duct, and a driving component on the isolation cover for driving the rotating fins to rotate. It has the following effects: the rotating fins are rotated by the driving component, thereby opening the outer side of the motor, at which point the cooling air duct will open, and with the rotation of the cooling fan, the air can be guided to flow along the outer wall of the body, quickly carrying away heat, achieving a cooling effect, thereby improving the environmental temperature adaptability of the motor body.

Description

Technical Field

[0001] This application relates to the technical field of motor equipment, and in particular to a three-phase asynchronous motor. Background Technology

[0002] Three-phase asynchronous motors are common drive motors and are widely used in daily production operations. Generally, this type of motor is used in large industrial equipment with three-phase power.

[0003] When a symmetrical three-phase current is applied to the symmetrical three-phase windings of a three-phase asynchronous motor, a rotating magnetic field is generated. The magnetic field cuts the rotor windings, and according to the principle of electromagnetic induction, e and i are generated in the rotor windings. The rotor windings are subjected to electromagnetic force in the magnetic field, that is, electromagnetic torque is generated, which makes the rotor rotate. The rotor outputs mechanical energy and drives the mechanical load to rotate.

[0004] Large industrial equipment is generally located outdoors, where it will encounter high temperatures or extremely low temperatures. The environment varies greatly, and sometimes it needs to dissipate heat and sometimes it needs to be insulated to provide a stable working environment. However, at present, three-phase asynchronous motors have almost no way to adapt to changes in ambient temperature. Summary of the Invention

[0005] In order to facilitate adaptation to changes in ambient temperature, this application provides a three-phase asynchronous motor.

[0006] This application provides a three-phase asynchronous motor, which adopts the following technical solution: An asynchronous motor includes a body, an isolation cover is provided outside the body, the isolation cover has multiple rotating slats, the free ends of the rotating slats are away from the outer wall of the body and form a cooling air duct with the body, a cooling fan is rotatably provided on the lower side of the body, the air inlet of the cooling fan is connected to the cooling air duct, and a driving component is provided on the isolation cover to drive the rotating slats to rotate.

[0007] By adopting the above technical solution, when the ambient temperature is low, the rotating fins remain closed, which can reduce internal heat dissipation. When the temperature is high, such as in the high temperature environment of summer, the rotating fins are rotated by the drive component, thereby opening the outer side of the motor. At this time, the cooling air duct will open, and with the rotation of the cooling fan, the air can be guided to flow along the outer wall of the machine body, quickly carrying away the heat and achieving a cooling effect, thereby improving the machine body's ability to adapt to ambient temperature.

[0008] Preferably, the isolation cover is provided with an isolation protrusion along the circumferential direction, one side of the rotating slat is rotatably connected to the isolation protrusion, the cooling air duct is provided on the isolation protrusion, the cooling air duct is arranged axially and communicates with the surface of the machine body, and when the rotating slat is closed, the air inlet end of the cooling air duct is closed.

[0009] By adopting the above technical solution, the isolation bump is a fixed installation point and can effectively construct a cooling air duct. When the rotating fin is closed, the cooling air duct will be sealed, thereby maintaining the temperature inside the machine.

[0010] Preferably, the rotating slit is provided with a rubber plug corresponding to the air inlet end.

[0011] By adopting the above technical solution, after closing, the rubber plug can block the air inlet of the cooling air duct, forming a better sealing effect.

[0012] Preferably, the driving component includes an annular abutment block that slides axially on the isolation cover, a protrusion disposed on the annular abutment block and corresponding to the rotating slit, and a linkage block that abuts against the protrusion is disposed on the inner wall of the rotating slit.

[0013] By adopting the above technical solution, when the driving component moves, the annular abutment will cause the protrusion to move axially and abut against the linkage block, causing the rotating disc to rotate.

[0014] Preferably, a spring body is provided between the rotating slit and the machine body to keep the rotating slit tending to close.

[0015] By adopting the above technical solution, the rebound spring body remains taut at all times, achieving a closing tendency and enabling better reset during opening and closing.

[0016] Preferably, a drive ring is threadedly connected to the upper side of the isolation cover, and the drive ring is axially fixed and circumferentially rotatably connected to the annular abutment.

[0017] By adopting the above technical solution, the drive ring will drive the annular abutment block to move during the rotation process, thereby realizing the movement after contact.

[0018] Preferably, the rotating slit is a hollow structure, and the rotating slit is filled with a thermal insulation layer.

[0019] Preferably, a detachable connector is provided between the annular abutment and the protrusion.

[0020] By adopting the above technical solution, during the opening process, some locations can be selected, such as focusing on opening some areas, cooling some areas, while other parts may need to maintain the temperature.

[0021] Preferably, the detachable connector includes a connecting spring connected between the annular stop and the protrusion, and a connecting stud threaded onto the annular stop. After rotation, the connecting stud slides axially and connects to the protrusion. The elastic coefficient of the connecting spring is less than that of the rebound spring body.

[0022] By adopting the above technical solution, the connection of the protrusion is achieved by the disengagement and connection of the connecting stud. When only the connecting spring is connected, the connecting spring will be compressed when moving in the axial direction, so that the protrusion will not abut against the linkage block and cause the whole to rotate.

[0023] Preferably, the rotating shaft of the machine body is coaxially fixedly connected to an expansion block, and a support block for abutting against the inner wall of the drive ring is radially slidably connected to the expansion block. A control module is provided on the expansion block for controlling and driving the movement of the support block. When the temperature reaches a certain value, the support block expands outward to drive the drive ring to move, and after the expansion block rotates a preset number of times, the support block retracts and disengages from the drive ring.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] In environments with temperature changes or different requirements, the internal structure of the machine is opened by rotating the fins, and cooling is achieved through the cooling air ducts. When closed, the sealing effect created by rotating the fins provides insulation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of this application, which conceals one of the rotating lobes;

[0028] Figure 3 This is a schematic diagram of the rotating slit structure in Embodiment 1 of this application;

[0029] Figure 4 This is a partial explosion diagram of Embodiment 1 of this application;

[0030] Figure 5 This is a schematic diagram of the structure when one of the connecting studs disengages from the corresponding protrusion in Embodiment 1 of this application;

[0031] Figure 6 This is a partial structural schematic diagram of Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached drawings: 100, body; 110, isolation cover; 111, rotating disc; 112, isolation protrusion; 113, cooling air duct; 114, rubber plug; 115, spring body; 116, cooling fan; 120, driving component; 121, annular stop block; 122, protrusion; 123, linkage block; 124, driving ring; 131, connecting spring; 132, connecting stud; 140, outward expansion block; 141, support block. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0034] Example 1:

[0035] This application discloses a three-phase asynchronous motor, referring to... Figures 1-5 It includes a body 100, and an isolation cover 110 is provided outside the body 100. The isolation cover 110 can be integrally installed on the body 100 or it can be set to be detachable, which is suitable for different bodies 100.

[0036] The isolation cover 110 has multiple rotating slats 111 and multiple isolation protrusions 112 in the circumferential direction. There are gaps between adjacent isolation protrusions 112, and the rotating slats 111 are disposed in the gaps. One side of the rotating slat 111 is rotatably connected to the isolation protrusion 112, and the axis of rotation of the rotating slat 111 is parallel to the length direction of the isolation cover 110. When the rotating slats 111 are closed, the isolation cover 110 can form a complete cylindrical shape.

[0037] After the free end of the rotating slat 111 moves away from the outer wall of the body 100, a cooling air duct 113 is formed between it and the body 100. A cooling fan 116 is rotatably mounted on the lower side of the body 100 and connected to a rotating shaft in the body 100. The air inlet of the cooling fan 116 is connected to the cooling air duct 113. A drive member 120 for driving the rotating slat 111 to rotate is provided on the isolation cover 110. The cooling air duct 113 is located on the isolation protrusion 122, is axially arranged and communicates with the surface of the body 100. The air inlet of the cooling air duct 113 is located on the side close to the free end of the rotating slat 111. When the rotating slat 111 is closed, the air inlet of the cooling air duct 113 is closed. At the same time, in this embodiment, a rubber plug 114 corresponding to the air inlet is provided on the rotating slat 111 for sealing purposes. The rotating slat 111 is a hollow structure (not shown in the figure) and is filled with heat-insulating material.

[0038] A spring body 115 is provided between the rotating flap 111 and the body 100 to keep the rotating flap 111 in a closed position. The driving member 120 includes an annular abutment 121 slidably disposed on the isolation cover 110 along the axial direction, a protrusion 122 disposed on the annular abutment 121 and corresponding to the rotating flap 111, and a linkage block 123 disposed on the inner wall of the rotating flap 111 that abuts against the protrusion 122. A driving ring 124 is threadedly connected to the upper side of the isolation cover 110. The driving ring 124 is axially fixed and circumferentially rotatably connected to the annular abutment 121, for example, through a bearing connection. Rotating the driving ring 124 causes the annular abutment 121 to move along the axial direction, and at the same time, after the protrusion 122 abuts against the linkage block 123, the rotating flap 111 rotates outward, achieving the opening effect.

[0039] To accommodate situations where some areas are cooled while others are insulated, a detachable connector is provided between the protrusion 122 and the annular abutment 121 in this embodiment. The detachable connector includes a connecting spring 131 connected between the annular abutment 121 and the protrusion 122, and a connecting stud 132 threaded onto the annular abutment 121. The connecting stud 132 rotates and slides axially to connect to the protrusion 122. The elastic coefficient of the connecting spring 131 is less than that of the rebound spring body 115. When linkage is required, rotating the connecting stud 132 connects the annular abutment 121 and the protrusion 122, with the protrusion 122 inserted into the upper side of the isolation cover 110 for convenient connection. When the connecting stud 132 detaches from the protrusion 122, the annular protrusion 122 only moves on its own, compressing the connecting spring 131, without causing relative movement between the protrusion 122 and the linkage block 123. The protrusion 122 remains in contact with the linkage block 123.

[0040] Example 2:

[0041] The difference from Example 1 is that, referring to Figure 6An expansion block 140 is coaxially fixed to the rotating shaft of the machine body 100. A gap exists between the expansion block 140 and the inner wall of the drive ring 124. A support block 141 is radially slidably connected to the expansion block 140 to abut against the inner wall of the drive ring 124. A linear motor connected to the support block 141 is installed inside the expansion block 140 to drive the support block 141 to move radially. A control module is installed on the expansion block 140 to control and drive the movement of the support block 141. When the temperature reaches a certain value, the support block 141 expands outward, causing the drive ring 124 to move. After the expansion block 140 rotates a preset number of times, the support block 141 retracts and disengages from the drive ring 124. In this embodiment, the control module consists of a temperature sensor and a rotation angle sensor. The temperature sensor is used to measure the temperature and is electrically connected to the linear motor. For example, when the temperature is 80 degrees Celsius, the linear motor will drive the support block 141 to move outward and press against the inner wall of the drive ring 124, thus forming movement. The rotation angle sensor is used to detect the rotation angle of the outward expansion block 140 and is electrically connected to the linear motor. For example, after 720°, the linear motor will cause the support block 141 to retract, thereby disengaging from the drive ring 124.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A three-phase asynchronous electric machine comprising a machine body (100), characterized in that: The machine body (100) is externally provided with an isolation cover (110), the isolation cover (110) has a plurality of rotating flaps (111), the free end of the rotating flap (111) is away from the outer wall of the machine body (100) and forms a cooling air duct (113) in communication between the machine body (100), the lower side of the machine body (100) is rotatably provided with a cooling fan (116), the air inlet end of the cooling fan (116) is in communication with the cooling air duct (113), the isolation cover (110) is provided with a driving member (120) for driving the rotating flap (111) to rotate; The isolation cover (110) is provided with an isolation protrusion (112) in the circumferential direction, one side of the rotating flap (111) is rotatably connected to the isolation protrusion (112), and the cooling air duct (113) is arranged on the isolation protrusion (112). The cooling air duct (113) is arranged in the axial direction and is in communication with the surface of the machine body (100), and when the rotating flap (111) is closed, the air inlet end of the cooling air duct (113) is closed. The driving member (120) comprises an annular abutting block (121) arranged in the axial direction on the isolation cover (110), and a protruding block (122) arranged on the annular abutting block (121) and corresponding to the rotating flap (111). The inner wall of the rotating flap (111) is provided with a linkage block (123) abutting against the protruding block (122). A rebound spring body (115) is arranged between the rotating flap (111) and the machine body (100), so that the rotating flap (111) has a tendency to be closed. A detachable connector is arranged between the annular abutting block (121) and the protruding block (122). The detachable connector comprises a connecting spring (131) connected between the annular abutting block (121) and the protruding block (122), and a connecting stud (132) threadedly connected to the annular abutting block (121). The connecting stud (132) is rotatable and slidable in the axial direction and is connected to the protruding block (122). The elastic coefficient of the connecting spring (131) is smaller than that of the rebound spring body (115).

2. A three-phase asynchronous motor according to claim 1, characterized in that: A rubber plug (114) corresponding to the air inlet end is arranged on the rotating flap (111).

3. A three-phase asynchronous motor according to claim 1, characterized in that: A driving ring (124) is threadedly connected to the upper side of the isolation cover (110). The driving ring (124) is axially fixed and circumferentially rotatably connected to the annular abutting block (121).

4. A three-phase asynchronous motor according to claim 1, characterized in that: The rotating flap (111) is a hollow structure, and the rotating flap (111) is filled with a heat preservation material layer.

5. A three-phase asynchronous motor according to claim 4, characterized in that: The rotating shaft of the machine body (100) is coaxially fixedly connected with an expansion block (140), the expansion block (140) is radially slidably connected with a supporting block (141) for abutting against the inner wall of the driving ring (124), and the expansion block (140) is provided with a control module for controlling and driving the movement of the supporting block (141). When the temperature reaches a certain value, the supporting block (141) expands to drive the movement of the driving ring (124), and after the expansion block (140) rotates a preset number of turns, the supporting block (141) retracts to disengage the driving ring (124).

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