Energy-saving three-phase asynchronous motor protection structure

Abstract

The utility model discloses a kind of protective structures for energy-saving three-phase asynchronous motor, including mounting plate, the motor main body is fixedly installed on the mounting plate upper surface by bolt, the protective cover that the motor main body is protected is fixedly connected on the mounting plate upper surface by bolt, the ventilation component that the motor main body is cooled by air convection is rotatably installed on the protective cover surface, the fixed cover that the internal space of the protective cover is communicated is equipped with one end of the protective cover. The utility model provides a kind of protective structures for energy-saving three-phase asynchronous motor, three-phase asynchronous motor can be protected by the setting of protective cover, when temperature is too high after long time use of motor, the flap in dynamic ventilation component is rotated with two groups of movable frame simultaneously by transmission assembly, protective cover can be opened, external air is made into protective cover interior by air convection, protective cover is ventilated, prevent heat accumulation in protective cover interior.

Description

Technical Field

[0001] This utility model relates to the field of three-phase asynchronous motor technology, and in particular to a protective structure for an energy-saving three-phase asynchronous motor. Background Technology

[0002] A three-phase asynchronous motor is a type of induction motor that is powered by three-phase 380V alternating current (with a phase difference of 120 degrees). Because the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is slip, hence the name three-phase asynchronous motor. The rotor speed of a three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor winding generates electromotive force and current due to the relative motion between it and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque, thus realizing energy conversion.

[0003] The applicant's search revealed that when a three-phase asynchronous motor is subjected to external impact during use, it may damage internal components, thereby affecting the normal operation of the motor. Generally, protective devices are installed on its exterior. However, after prolonged use, the three-phase asynchronous motor generates heat. If the heat cannot be dissipated through the protective device, it may damage internal components, rendering the motor unusable and affecting its normal operation.

[0004] Therefore, the applicant proposes a protective structure for an energy-saving three-phase asynchronous motor to solve this problem. Utility Model Content

[0005] This invention provides a protective structure for an energy-saving three-phase asynchronous motor, which solves the problems mentioned in the background.

[0006] To solve the above-mentioned technical problems, this utility model provides a protective structure for an energy-saving three-phase asynchronous motor, including a mounting plate. A motor body is fixedly mounted on the upper surface of the mounting plate by bolts. A protective cover for protecting the motor body is fixedly connected to the upper surface of the mounting plate by bolts. A ventilation component that uses air convection to dissipate heat from the motor body is rotatably mounted on the surface of the protective cover. A fixed cover communicating with its internal space is provided at one end of the protective cover. A transmission component that provides power to the ventilation component is fixedly installed inside the fixed cover.

[0007] The ventilation assembly includes movable frames that are movably mounted on both sides of the protective cover. A first filter screen is fixedly mounted on the surfaces of the two sets of movable frames. An installation groove is provided at the top of the protective cover. A flap is movably mounted on the inner wall of the installation groove. A movable plate is movably mounted below the flap inside the protective cover. A second filter screen is mounted on the surface of the movable plate.

[0008] Preferably, the transmission assembly includes a servo motor, the output shaft of which is connected to a worm gear rotatably connected to the inner wall of the fixed cover via a coupling, a worm wheel meshing above the worm gear, and a transmission rod fixedly sleeved at the center of the worm wheel shaft.

[0009] Preferably, the end of the protective cover away from the fixed cover is fixedly connected to a connecting plate by bolts, the connecting plate is in contact with the movable plate, and a heat dissipation mesh is fixedly installed on the surface of the fixed cover.

[0010] Preferably, connecting strips are fixedly connected to both sides of the inner wall of the protective cover, and limit grooves are formed on the upper surface of the two sets of connecting strips. Limiting blocks matching the limit grooves are fixedly connected to the lower surfaces of both ends of the movable plate.

[0011] Preferably, both sides of the protective cover are rotatably connected to a cleaning rod that contacts the first filter screen, and the two ends of the cleaning rod are rotatably connected to the protective cover via torsion springs.

[0012] Preferably, a drive shaft extending into the interior of the fixed cover is fixedly connected to the center of the flap axis, and a second synchronous wheel is fixedly connected to one end of the drive shaft. A rotating shaft extending into the interior of the fixed cover is fixedly connected to one end of each of the two sets of movable frames, and a third synchronous wheel is fixedly connected to one end of the rotating shaft.

[0013] Preferably, the outer wall of the transmission rod is fixedly sleeved with three sets of parallel first synchronous pulleys, and the outer walls of the three sets of first synchronous pulleys are all sleeved with synchronous belts, and the three sets of synchronous belts are respectively sleeved with the outer walls of the second and third synchronous pulleys.

[0014] Preferably, a support block is fixedly connected to the upper surface of the mounting plate, an arc-shaped heat-conducting block is fixedly installed on the upper surface of the support block, a PTC sensor that is tightly fitted to the arc-shaped heat-conducting block is fixedly installed inside the support block, and an ambient temperature sensor is installed inside the fixing cover below the motor.

[0015] Compared with related technologies, the protective structure for an energy-saving three-phase asynchronous motor provided by this utility model has the following beneficial effects:

[0016] This utility model provides a protective structure for an energy-saving three-phase asynchronous motor. The protective cover can protect the three-phase asynchronous motor. When the motor temperature is too high after long-term use, the transmission component drives the flap and two sets of movable frames in the ventilation component to rotate simultaneously, which opens the protective cover. The air convection allows the outside air to enter the protective cover, ventilating the cover and preventing heat buildup inside.

[0017] This utility model provides a protective structure for an energy-saving three-phase asynchronous motor. With the cleaning rod, when the movable frame rotates from the outside of the protective cover to the inside of the protective cover, the cleaning rod can clean the dust on the surface of the first filter screen. Separating the connecting plate from the protective cover, the movable plate can be pulled out from the inside of the protective cover for cleaning, thereby preventing the filter screen from becoming clogged and affecting the normal heat dissipation of the protective cover. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a first-view perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is a second-view perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0021] Figure 4 This is a bottom view of part of the structure of this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the overall internal structure of the protective cover of this utility model.

[0023] The following are the labeling elements in the diagram: 1. Mounting plate; 11. Support block; 12. Arc-shaped heat-conducting block; 13. Motor body; 2. Protective cover; 21. Connecting plate; 22. Fixing cover; 221. Heat dissipation mesh; 23. Mounting groove; 24. Connecting strip; 25. Cleaning rod; 26. Flip plate; 3. Movable frame; 31. First filter screen; 32. Movable plate; 33. Second filter screen; 34. Limiting block; 4. Servo motor; 41. Worm gear; 42. Worm wheel; 43. Transmission rod; 44. First synchronous pulley; 45. Second synchronous pulley; 46. Third synchronous pulley; 47. Synchronous belt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Depend on Figures 1-5As can be seen, this utility model includes a mounting plate 1, on which a motor body 13 is fixedly mounted by bolts on the upper surface of the mounting plate 1, and a protective cover 2 for protecting the motor body 13 is fixedly connected to the upper surface of the mounting plate 1 by bolts. A ventilation component for dissipating heat from the motor body 13 by utilizing air convection is rotatably mounted on the surface of the protective cover 2. A fixed cover 22 communicating with its internal space is provided at one end of the protective cover 2, and a transmission component for providing power to the ventilation component is fixedly mounted inside the fixed cover 22.

[0026] A support block 11 is fixedly connected to the upper surface of the mounting plate 1. An arc-shaped heat-conducting block 12 is fixedly installed on the upper surface of the support block 11. The arc-shaped heat-conducting block 12 is tightly fitted to the outer shell of the motor body 13. After the motor body 13 has been used for a long time, a PTC sensor that is tightly fitted to the arc-shaped heat-conducting block 12 is fixedly installed inside the support block 11. The arc-shaped heat-conducting block 12 transfers heat to the PTC sensor. An ambient temperature sensor is installed inside the fixing cover 22 below the motor 4. The temperature of the motor body 13 is monitored by the cooperation of the PTC sensor and the ambient temperature sensor (a central processing unit and a wireless control module are installed inside the support block 11). When the PTC sensor detects that the temperature exceeds the set threshold, the protection mechanism is triggered, and the servo motor 4 can be started by controlling it through the wireless control module.

[0027] The transmission assembly includes a servo motor 4. The output shaft of the servo motor 4 is connected to a worm gear 41 that is rotatably connected to the inner wall of the fixed cover 22 via a coupling. A worm wheel 42 meshes above the worm gear 41. A transmission rod 43 is fixedly sleeved at the center of the worm wheel 42. The servo motor 4 drives the worm gear 41 to rotate the worm wheel 42, which in turn drives the transmission rod 43 to rotate.

[0028] A drive shaft extending into the interior of the fixed cover 22 is fixedly connected to the axis of the flap 26, and a second synchronous wheel 45 is fixedly connected to one end of the drive shaft. The second synchronous wheel 45 can drive the flap 26 to rotate through the drive shaft. One end of each of the two sets of movable frames 3 is fixedly connected to a rotating shaft extending into the interior of the fixed cover 22, and a third synchronous wheel 46 is fixedly connected to one end of the rotating shaft. The third synchronous wheel 46 can drive the movable frame 3 to rotate out from inside the protective cover 2 through the rotating shaft.

[0029] Three sets of parallel first synchronous pulleys 44 are fixedly sleeved on the outer wall of the transmission rod 43. Each set of first synchronous pulleys 44 is sleeved with a synchronous belt 47. The three sets of synchronous belts 47 are respectively sleeved on the outer walls of the second synchronous pulley 45 and the third synchronous pulley 46. The transmission rod 43 drives the three sets of first synchronous pulleys 44 to rotate. Under the action of the three sets of synchronous belts 47, the second synchronous pulley 45 and the two sets of third synchronous pulleys 46 can be driven to rotate respectively, which can drive the flap 26 and the movable frame 3 to rotate, and ventilate the protective cover 2.

[0030] The ventilation assembly includes movable frames 3 (two sets of movable frames 3 rotate in opposite directions) that are movably mounted on both sides of the protective cover 2. A first filter 31 is fixedly mounted on the surface of the two sets of movable frames 3. The first filter 31 can filter the air entering the protective cover 2 to prevent dust from entering the protective cover 2 and affecting the use of the motor body 13. The top of the protective cover 2 is provided with a mounting groove 23. A flap 26 is movably mounted on the inner wall of the mounting groove 23. A movable plate 32 is movably mounted below the flap 26 inside the protective cover 2. A second filter 33 is mounted on the surface of the movable plate 32. The second filter 33 can also filter the air entering the protective cover 2.

[0031] Both sides of the protective cover 2 are rotatably connected to cleaning rods 25 that contact the first filter screen 31. The two ends of the cleaning rods 25 are rotatably connected to the protective cover 2 through torsion springs. When the protective cover 2 is ventilated, the movable frame 3 is driven to retract into the protective cover 2 under the action of the transmission component. During the rotation of the movable frame 3, the cleaning rods 25 clean the surface of the first filter screen 31 to prevent dust from accumulating on the first filter screen 31 and affecting the ventilation efficiency.

[0032] Connecting strips 24 are fixedly connected to both sides of the inner wall of the protective cover 2. Limiting grooves are opened on the upper surface of the two sets of connecting strips 24. Limiting blocks 34 matching the limiting grooves are fixedly connected to the lower surfaces of both ends of the movable plate 32. The movable plate 32 can be installed inside the protective cover 2 by the mutual cooperation of the limiting blocks 34 and the limiting grooves.

[0033] The end of the protective cover 2 away from the fixed cover 22 is fixedly connected to the connecting plate 21 by bolts. By disassembling the connecting plate 21 from the fixed cover 22, the movable plate 32 can be pulled out from the inside of the protective cover 2 to clean the second filter screen 33. The connecting plate 21 is in contact with the movable plate 32. A heat dissipation mesh 221 is fixedly installed on the surface of the fixed cover 22. The heat dissipation mesh 221 can dissipate heat from the transmission components and improve the ventilation effect of the protective cover 2 and the fixed cover 22.

[0034] Working principle: First, the motor body 13 is installed on the upper surface of the mounting plate 1 using bolts. Then, the protective cover 2 and the fixing cover 22 are fixedly connected to the mounting plate 1 using bolts. Next, the connecting plate 21 is connected to the protective cover 2 using bolts. After the protective cover 2 and the fixing cover 22 are installed, the motor body 13 is protected. After prolonged use, the temperature generated by the motor body 13 is transmitted to the PTC sensor through the arc-shaped heat-conducting block 12. Combined with an ambient temperature sensor, the surrounding environment is monitored. When the temperature of the PTC sensor exceeds the threshold, the servo motor 4 is started via a wireless control module (the wireless control module is existing technology and will not be described in detail here). The servo motor 4 drives the worm gear 41 to rotate, which in turn drives the worm wheel 42 to rotate. The worm wheel 42, in conjunction with the transmission rod 43, drives the three sets of first synchronous pulleys 44 to rotate. The first synchronous pulley 44, in conjunction with the synchronous belt 47, drives the two sets of third synchronous pulleys 46 and second synchronous pulleys 45 to rotate. The second synchronous pulleys 45 and third synchronous pulleys 46, in conjunction with the transmission shaft and the rotation shaft, drive the flap 26 and the movable frame 3 to rotate, thereby opening the protective cover 2. Air convection is used to ventilate the inside of the protective cover 2, preventing heat accumulation. After ventilation is completed, the servo motor 4 drives the worm gear 41 to reverse, thereby retracting the movable frame 3 and the first filter screen 31 into the protective cover 2. When the first filter screen 31 rotates, the cleaning rod 25 scrapes off the dust on the first filter screen 31, thereby preventing the first filter screen 31 from becoming clogged. When it is necessary to clean the second filter screen 33, the connecting plate 21 is separated from the protective cover 2, and the movable plate 32 can be pulled out from the inside of the protective cover 2 to clean the second filter screen 33, which facilitates the improvement of the ventilation effect of the protective cover 2.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective structure for an energy-saving three-phase asynchronous motor, comprising a mounting plate (1), wherein a motor body (13) is fixedly mounted on the upper surface of the mounting plate (1) by bolts, and a protective cover (2) for protecting the motor body (13) is fixedly connected to the upper surface of the mounting plate (1) by bolts, characterized in that: The protective cover (2) is rotatably mounted on its surface with a ventilation component that uses air convection to dissipate heat from the motor body (13). One end of the protective cover (2) is provided with a fixed cover (22) that communicates with its internal space. A transmission component that provides power to the ventilation component is fixedly installed inside the fixed cover (22). The ventilation assembly includes movable frames (3) that are movably installed on both sides of the protective cover (2). A first filter screen (31) is fixedly installed on the surface of the two sets of movable frames (3). A mounting groove (23) is provided at the top of the protective cover (2). A flap (26) is movably installed on the inner wall of the mounting groove (23). A movable plate (32) is movably installed below the flap (26) inside the protective cover (2). A second filter screen (33) is installed on the surface of the movable plate (32).

2. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The transmission assembly includes a servo motor (4), the output shaft of which is connected to a worm gear (41) that is rotatably connected to the inner wall of the fixed cover (22) via a coupling. A worm wheel (42) meshes above the worm gear (41), and a transmission rod (43) is fixedly sleeved at the center of the worm wheel (42).

3. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The protective cover (2) is fixedly connected to a connecting plate (21) by bolts at one end away from the fixed cover (22). The connecting plate (21) is in contact with the movable plate (32). A heat dissipation mesh (221) is fixedly installed on the surface of the fixed cover (22).

4. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The inner walls of the protective cover (2) are fixedly connected with connecting strips (24) on both sides. Limiting grooves are opened on the upper surfaces of the two sets of connecting strips (24). Limiting blocks (34) matching the limiting grooves are fixedly connected to the lower surfaces of both ends of the movable plate (32).

5. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The protective cover (2) has cleaning rods (25) rotatably connected to both sides of the protective cover (2) and in contact with the first filter screen (31). The two ends of the cleaning rods (25) are rotatably connected to the protective cover (2) through torsion springs.

6. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The flap (26) is fixedly connected to a drive shaft extending into the interior of the fixed cover (22), and a second synchronous wheel (45) is fixedly connected to one end of the drive shaft. Both sets of movable frames (3) are fixedly connected to a rotating shaft extending into the interior of the fixed cover (22), and a third synchronous wheel (46) is fixedly connected to one end of the rotating shaft.

7. The protective structure for an energy-saving three-phase asynchronous motor according to claim 2, characterized in that: The transmission rod (43) has three sets of parallel first synchronous pulleys (44) fixedly sleeved on its outer wall. Each set of first synchronous pulleys (44) has a synchronous belt (47) sleeved on its outer wall. The three sets of synchronous belts (47) are respectively sleeved on the outer walls of the second synchronous pulley (45) and the third synchronous pulley (46).

8. The protective structure for an energy-saving three-phase asynchronous motor according to claim 1, characterized in that: A support block (11) is fixedly connected to the upper surface of the mounting plate (1), and an arc-shaped heat-conducting block (12) is fixedly installed on the upper surface of the support block (11). A PTC sensor that is tightly fitted to the arc-shaped heat-conducting block (12) is fixedly installed inside the support block (11), and an ambient temperature sensor is installed inside the fixing cover (22) below the motor (4).

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