Energy-saving three-phase asynchronous motor

Abstract

The application relates to an energy-saving three-phase asynchronous motor, which comprises a shell, a rotating shaft rotatably connected to the shell, a fan arranged on the rotating shaft, a water cooling device and a detection device, a water cooling channel spirally arranged in the shell along an axis direction parallel to the rotating shaft, and an inlet and an outlet arranged at two ends of the water cooling channel respectively, wherein the inlet and the outlet are communicated with the outside, the detection device is used for detecting the rotating speed of the rotating shaft, and the water cooling device is used for feeding water into the water cooling channel from the inlet when the rotating speed of the rotating shaft detected by the detection device is greater than a set value. When the rotating speed of the motor rotating shaft detected by the detection device is less than the set value, the motor is cooled by using the self-provided fan, and when the rotating speed of the motor rotating shaft detected by the detection device is greater than the set value, the water cooling device is used for feeding water into the water cooling channel from the inlet. The cooling water can absorb and remove the heat of the motor, the motor can be further cooled on the basis of the fan cooling, and the heat dissipation effect of the motor at high rotating speed is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric machines, in particular to an energy-saving three-phase asynchronous motor. BACKGROUND

[0002] Three-phase alternating current asynchronous motor is a kind of electric drive device that converts electric energy into mechanical energy. It is mainly composed of stator, rotor and air gap between them. After three-phase alternating current power supply is connected to the stator winding, rotating magnetic field is generated and cuts the rotor to obtain torque. Three-phase alternating current asynchronous motor has the advantages of simple structure, reliable operation, low price, strong overload capacity, and convenient use, installation and maintenance, and is widely used in various fields.

[0003] The utility model discloses a three-phase asynchronous motor of CN214707366U discloses a kind of three-phase asynchronous motor, it includes shell, stator and rotor being set in shell, shell is equipped with support seat, shell includes shell body, end cap being set in shell body and cover being set in shell body, end cap is integrally arranged with shell body, the rotor is fixed with rotating shaft, the end cap is equipped with bearing cover, the bearing hole is opened in the bearing cover, and the rotating shaft is worn out;The shell is fixed with fixed cover near one end of the cover, the rotor is rotatably connected with the fixed cover, the fixed cover is equipped with fan away from the rotor, and the fan is fixedly connected with the rotor.

[0004] The related technical solutions have the following defects: the above-mentioned motor has a fan for cooling, when the speed of the motor reaches a certain level, the temperature of the motor becomes high, and the fan alone is not enough to cool the motor. SUMMARY

[0005] In order to improve the heat dissipation effect of the motor at high speed, the present application provides an energy-saving three-phase asynchronous motor.

[0006] The energy-saving three-phase asynchronous motor provided by the present application adopts the following technical solutions:

[0007] An energy-saving three-phase asynchronous motor, comprising a shell, a rotating shaft rotatably connected to the shell, a fan provided on the rotating shaft, a water cooling device and a detection device, a water cooling channel spirally provided in the shell along the axis direction parallel to the rotating shaft, the two ends of the water cooling channel being an inlet and an outlet respectively, the inlet and the outlet being in communication with the outside, the detection device being used to detect the speed of the rotating shaft, and the water cooling device being used to pass water into the water cooling channel from the inlet when the speed of the rotating shaft detected by the detection device is greater than a set value.

[0008] By adopting the technical scheme, when the rotating speed of the rotating shaft detected by the detection device is less than the set value, the motor is cooled by the fan, and when the rotating speed of the rotating shaft detected by the detection device is greater than the set value, the water cooling device is used to pass water from the inlet into the water cooling channel, and the cooling water can absorb and take away part of the heat of the motor, so that the motor is further cooled on the basis of the fan cooling, and the heat dissipation effect of the motor at high rotating speed is improved.

[0009] Preferably, the detection device comprises a controller, a rotating disc, a pressure sensor, a sliding block and a spring, the rotating disc is coaxially fixed on the rotating shaft, the rotating disc is rotationally connected in the housing, a sliding groove is formed in the rotating disc along the direction perpendicular to the axis of the rotating shaft, the pressure sensor is fixed at one end of the sliding groove away from the rotating shaft, the sliding block is slidingly connected on the sliding groove along the length direction of the sliding groove, the spring is fixed at the other end of the sliding groove close to the rotating shaft and on the sliding block, the spring is always in a compressed state, and the sliding block is always abutted on the pressure sensor, and when the pressure detected by the pressure sensor is greater than the set value, the controller controls the water cooling device to operate.

[0010] By adopting the technical scheme, when the rotating shaft rotates, the sliding block moves to the side of the pressure sensor under the action of the centrifugal force, the pressure sensor can detect the force of the sliding block, so as to judge the rotating speed of the rotating shaft, and then the controller controls whether the water cooling device operates according to whether the value detected by the pressure sensor exceeds the set value.

[0011] Preferably, the water cooling device comprises a linkage, a piston, a bidirectional screw rod, a water inlet pipe, a water outlet pipe and a receiving box with an inner cavity, the receiving box is connected on the motor, the piston is slidingly connected on the inner cavity and divides the inner cavity into the first cavity and the second cavity which are not communicated with each other, the bidirectional screw rod is rotationally connected on the inner cavity along the sliding direction of the piston, the bidirectional screw rod is threadedly connected on the piston, the linkage drives the bidirectional screw rod to rotate, the two ends of the water inlet pipe are respectively communicated with the first cavity and an external water source, the two ends of the water outlet pipe are respectively communicated with the first cavity and the inlet, the water inlet pipe and the water outlet pipe are provided with one-way valves, the one-way valve on the water inlet pipe only allows the cooling liquid of the external water source to flow to the first cavity, and the one-way valve on the water outlet pipe only allows the cooling liquid in the first cavity to flow to the inlet.

[0012] By adopting the technical scheme, when the water cooling device needs to be started to cool the motor, the linkage drives the bidirectional screw rod to rotate, and drives the piston to slide back and forth on the inner cavity, when the piston slides to the side of the second cavity, the space of the first cavity becomes larger, the cooling liquid of the external water source is sucked by the water inlet pipe and flows to the first cavity through the one-way valve, and then when the piston slides to the side of the first cavity, the cooling liquid in the first cavity flows out from the water outlet pipe through the one-way valve and enters the cooling channel from the inlet, so that the cooling water can absorb and take away part of the heat of the motor, thereby cooling the motor.

[0013] Preferably, the linkage comprises a linkage shaft, a driving member, an abutting wheel, a synchronous belt, two synchronous wheels and two gears, the housing is provided with a movable plate, the linkage shaft is arranged in parallel with the axis direction of the bidirectional screw rod and movably connected to the movable plate, the two synchronous wheels are coaxially fixed on the linkage shaft and the bidirectional screw rod respectively, the synchronous belt is wound on the two synchronous wheels, the abutting wheel abuts on the synchronous belt and is used for keeping the synchronous belt in a tensioned state, the two gears are coaxially fixed on the rotating shaft and the linkage shaft respectively, and the driving member drives the linkage shaft to be movably connected to the movable plate and controls the meshing connection of the two gears.

[0014] By adopting the above technical scheme, the driving member controls the meshing connection of the gears on the linkage shaft and the gears on the rotating shaft by controlling the movement of the linkage shaft, when the linkage shaft moves to the meshing connection of the two gears, the rotating shaft drives the bidirectional screw rod to rotate, thereby starting the water cooling device to run, when the linkage shaft moves to the separation of the two gears, the bidirectional screw rod will not continue to rotate, and the water cooling device stops running.

[0015] Preferably, it further comprises a rotating rod, a movable block and two elastic wheels, the two elastic wheels are coaxially fixed on the rotating shaft and the linkage shaft respectively, the elastic wheels are located on the same side of the corresponding gears, the diameter of the elastic wheels is larger than that of the gears, and a gap is left between the elastic wheel on the linkage shaft and the gear for accommodating the elastic wheel on the rotating shaft;

[0016] One end of the linkage shaft towards the movable plate is slidably connected with an extension shaft in parallel with the axis direction of the linkage shaft, the extension shaft is movably connected to the movable plate, and one of the synchronous wheels is coaxially fixed on the extension shaft;

[0017] The rotating rod is threaded and connected to the movable block, both ends of the rotating rod are fixed to the motor, the rotating rod and the rotating shaft are arranged in parallel with each other, the linkage shaft is rotatably connected to the movable block, and the driving member drives the movable block to rotate spirally on the rotating rod;

[0018] When the driving member drives the linkage shaft to move towards the rotating shaft side to the meshing connection of the two gears, the two elastic wheels first abut against each other, at this time, the two gears are arranged close to each other and do not contact each other, then the driving member drives the linkage shaft to continue to move towards the rotating shaft side, the elastic wheel on the rotating shaft is located in the gap, and at this time, the two gears are meshingly connected.

[0019] By adopting the technical scheme, the driving member drives the movable plate to rotate spirally on the rotating rod, the movable plate can move along the axis direction of the rotating rod while rotating along the rotating rod, and by using this characteristic, the linkage shaft can move along the axis direction during the movement of the linkage shaft to the side close to the rotating shaft, so that during the movement of the driving member to drive the linkage shaft to move to the side of the rotating shaft until the two gears are meshed and connected, the two elastic wheels first abut against each other, at this time, the two gears are close to each other, and the two elastic wheels play a certain buffering role, so that the two gears can slowly approach each other, and the collision degree of the two gears when meshing with each other can be alleviated.

[0020] Preferably, when the two elastic wheels abut against each other, the rotating shaft drives the linkage shaft to rotate synchronously.

[0021] By adopting the technical scheme, since the gear on the rotating shaft always rotates with the rotating shaft, and the gear on the linkage shaft does not rotate at the beginning, when the stationary gear is directly close to the rotating gear, the two gears will rub against each other sharply, thereby increasing the wear of the gears, so that when the two elastic wheels abut against each other, the rotating shaft can drive the linkage shaft to rotate, so that the gear on the linkage shaft has an initial rotating speed, and then when the two gears are close to each other and meshed and connected again, the two gears can reduce the degree of collision and wear between each other, thereby prolonging the service life of the gears.

[0022] Preferably, the elastic wheel is in a circular truncated cone shape, when the two elastic wheels abut against each other, the circumferential outer walls of the two elastic wheels cooperate with each other, and the side of the elastic wheel on the linkage shaft close to the corresponding gear to the side away from the corresponding gear is gradually expanded.

[0023] By adopting the technical scheme, the elastic wheel is arranged in a circular truncated cone shape, so that during the movement of the rotating shaft, the two elastic wheels form a guide surface, thereby making the rotating shaft move more smoothly.

[0024] Preferably, an arc-shaped groove is formed in the movable path of the extending shaft on the movable plate, and the end of the extending shaft away from the linkage shaft is slidingly and rotatably connected in the arc-shaped groove.

[0025] By adopting the technical scheme, the arc-shaped groove can limit and stabilize the movement of the extending shaft, since the extending shaft is directly connected with the linkage shaft, the stability of the linkage shaft during movement can be improved at the same time, and finally the stability of the water cooling device during operation can be improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] Through setting the detecting device and the water cooling device, when the rotating speed of the rotating shaft detected by the detecting device is greater than the set value, the water cooling device is used for passing water from the inlet into the water cooling channel, and the motor is further cooled on the basis of the fan cooling, so that the heat dissipation effect of the motor at high rotating speed is improved.

[0028] By setting the arc-shaped grooves on the movable plate, the arc-shaped grooves can limit and stabilize the movement of the extension shaft, and since the extension shaft is directly connected with the linkage shaft, the stability of the linkage shaft during movement can be improved, so as to improve the stability of the water cooling device during operation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application.

[0030] Figure 2 is a sectional view along line A-A in Figure 1

[0031] Figure 3 is a schematic diagram of the structure of the water cooling device and the fan of the embodiment of the application.

[0032] Figure 4 is a schematic diagram of the structure of the two elastic wheels when they are in abutment.

[0033] Figure 5 is a schematic diagram of the structure of the water cooling device when it stops operating.

[0034] BRIEF DESCRIPTION OF DRAWINGS1, housing; 11, rotating shaft; 12, fan; 13, support seat; 14, inlet; 15, outlet; 16, flat plate; 161, movable plate; 162, arc-shaped groove; 2, water cooling device; 21, receiving box; 211, inner cavity; 2111, first cavity; 2112, second cavity; 22, piston; 23, bidirectional screw; 24, water outlet pipe; 25, water inlet pipe; 3, detecting device; 31, pressure sensor; 32, sliding block; 33, spring; 34, sliding groove; 35, rotating disc; 4, linkage member; 41, linkage shaft; 411, extension shaft; 42, driving member; 421, air cylinder; 422, moving block; 43, abutting wheel; 44, synchronous belt; 45, synchronous wheel; 46, gear; 461, gap; 47, movable block; 48, limiting block; 481, rotating rod; 49, elastic wheel. DETAILED DESCRIPTION

[0035] The following will be described in detail with reference to the accompanying drawings. Figures 1-5 The application will be described in further detail.

[0036] The embodiment of the application discloses an energy-saving three-phase asynchronous motor.

[0037] Reference Figure 1 , Figure 2This embodiment of an energy-saving three-phase asynchronous motor includes a housing 1, a water-cooling device 2, and a detection device 3. The housing 1 houses a stator and rotor, and a rotating shaft 11 is rotatably connected within the housing 1. The rotating shaft 11 is coaxially and fixedly connected to the rotor core within the rotor. When the motor is energized, it drives the rotating shaft 11 to rotate. The operator can change the frequency of the power supply to alter the rotational speed of the rotating shaft 11. A support base 13 is fixed to the bottom outer wall of the housing 1, supporting the motor on a horizontal surface.

[0038] Reference Figure 1 , Figure 3 A fan 12 is coaxially fixed on the rotating shaft 11. When the rotating shaft 11 rotates, it drives the fan 12 to rotate, thereby dissipating heat from the inside of the motor. However, when the motor speed reaches a certain level, the motor temperature becomes high. At this point, cooling by the fan 12 alone is insufficient to dissipate heat from the motor. This speed at which the motor cannot be cooled by the fan 12 alone is called the speed setpoint. The setpoint can be within a range and can be adjusted according to different ambient temperatures.

[0039] Reference Figure 1 , Figure 3 A water-cooling channel is spirally formed inside the housing 1 along the axis parallel to the rotating shaft 11. The two ends of the water-cooling channel are the inlet 14 and the outlet 15, respectively, and both the inlet 14 and the outlet 15 are connected to the outside. The detection device 3 is used to detect the rotational speed of the rotating shaft 11. When the detection device 3 detects that the rotational speed of the rotating shaft 11 is greater than a set value, the water-cooling device 2 is used to introduce cooling water into the water-cooling channel from the inlet 14. After absorbing heat, the cooling water is discharged from the housing 1 through the outlet 15.

[0040] Reference Figure 1 , Figure 2 The detection device 3 includes a controller, a turntable 35, two pressure sensors 31, two sliders 32, and two springs 33. The turntable 35 is sleeved and coaxially fixed on the rotating shaft 11. The turntable 35 is rotatably connected inside the housing 1. Two grooves 34 are formed inside the turntable 35 along the axis perpendicular to the rotating shaft 11. The two pressure sensors 31 correspond to the two grooves 34 respectively, and the pressure sensors 31 are fixed at the end of the corresponding groove 34 away from the rotating shaft 11. The two grooves 34 are located on both sides of the rotating shaft 11 and are arranged facing each other. The two sliders 32 correspond to the two grooves 34 respectively, and the sliders 32 are slidably connected to the corresponding grooves 34 along the length of the corresponding groove 34. The two springs 33 correspond to the two grooves 34 respectively, and the two ends of the springs 33 are fixed to the end face of the corresponding groove 34 near the rotating shaft 11 and the end face of the slider 32 facing the rotating shaft 11 respectively. The springs 33 are always in a compressed state, and the sliders 32 are always in contact with the pressure sensors 31.

[0041] Reference Figure 1 ,Figure 2 When the rotating shaft 11 rotates, the slider 32 will be moved to the pressure sensor 31 side under the action of centrifugal force, and the pressure sensor 31 can detect the force of the slider 32 to determine the rotating speed of the rotating shaft 11. The controller is installed on the motor, and when the pressure detected by the pressure sensor 31 exceeds the set value, the controller controls the water cooling device 2 to operate.

[0042] Referring to Figure 1 , Figure 3 , the water cooling device 2 comprises a linkage 4, a piston 22, a bidirectional screw 23, a water inlet pipe 25, a water outlet pipe 24 and a receiving box 21 with an inner cavity 211. The support base 13 is fixed with a flat plate 16, the bottom surface of the flat plate 16 is located on the same plane as the bottom surface of the support base 13, and the flat plate 16 and the support base 13 jointly support the motor. The receiving box 21 is fixed on the top surface of the flat plate 16, and the receiving box 21 is located on one side of the motor. The piston 22 is slidably connected to the inner cavity 211 along the axis direction parallel to the rotating shaft 11 and divides the inner cavity 211 into first and second cavities 2111 and 2112. The bidirectional screw 23 is rotatably connected to the inner cavity 211 and the axis direction of the bidirectional screw 23 is parallel to the axis direction of the rotating shaft 11. The bidirectional screw 23 penetrates and is threadedly connected to the piston 22. The linkage 4 is used to drive the bidirectional screw 23 to rotate. The two ends of the water inlet pipe 25 are respectively used to communicate with the first cavity 2111 and an external water source. The two ends of the water outlet pipe 24 are respectively used to communicate with the first cavity 2111 and the inlet 14. A one-way valve is installed on each of the water inlet pipe 25 and the water outlet pipe 24. The one-way valve on the water inlet pipe 25 only allows the cooling liquid of the external water source to flow to the first cavity 2111. The one-way valve on the water outlet pipe 24 only allows the cooling liquid in the first cavity 2111 to flow to the inlet 14.

[0043] Referring to Figure 1 , Figure 3 When it is necessary to start the water cooling device 2 to cool the motor, the linkage 4 drives the bidirectional screw 23 to rotate, which drives the piston 22 to slide back and forth in the inner cavity 211. When the piston 22 slides to the second cavity 2112 side, the space of the first cavity 2111 becomes larger, and the water inlet pipe 25 sucks the cooling liquid of the external water source to flow to the first cavity 2111 through the one-way valve. Then, when the piston 22 slides to the first cavity 2111 side, the cooling liquid in the first cavity 2111 flows out from the water outlet pipe 24 through the one-way valve and enters the cooling channel from the inlet 14. The cooling water absorbs and carries away part of the heat of the motor, thereby cooling the motor.

[0044] Referring to Figure 4 , Figure 5The linkage 4 comprises a linkage shaft 41, a driving member 42, an abutting wheel 43, a synchronous belt 44, two synchronous wheels 45 and two gearwheels 46. The top surface of the flat plate 16 is fixed with a movable plate 161 which is vertically arranged and whose plane is perpendicular to the rotation shaft 11. The one end of the linkage shaft 41 is slidably connected with an extension shaft 411 which is parallel to the axis of the linkage shaft 41, and the extension shaft 411 is movably connected to the movable plate 161. The extension shaft 411 is located at the side of the movable plate 161 which extends out of the end of the casing 1 towards the rotation shaft 11, and the linkage shaft 41 is parallel to the axis of the bidirectional screw 23. The two synchronous wheels 45 are coaxially fixed on the extension shaft 411 and the end of the bidirectional screw 23 which extends out of the receiving box 21, respectively. The synchronous belt 44 is wound around the two synchronous wheels 45. The abutting wheel 43 is rotatably connected to the movable plate 161 and always abuts against the synchronous belt 44 to keep the synchronous belt 44 in a tensioned state. The two gearwheels 46 are coaxially fixed on the rotation shaft 11 and the linkage shaft 41, respectively. The controller is used to control the operation of the driving member 42, and the driving member 42 is used to drive the linkage shaft 41 to be movably connected to the movable plate 161. When the two gearwheels 46 are engaged, the water cooling device 2 is started. When the two gearwheels 46 are separated, the water cooling device 2 stops running.

[0045] With reference to Figure 3 , Figure 5 The top surface of the flat plate 16 is fixed with two limiting blocks 48, and the two limiting blocks 48 are rotatably connected with a rotating rod 481. The two ends of the rotating rod 481 are rotatably connected to the two limiting blocks 48, respectively, and the axis of the rotating rod 481 is parallel to the axis of the rotation shaft 11. The rotating rod 481 is threadedly connected with a movable block 47, and the rotating rod 481 penetrates and is threadedly connected to one end of the movable block 47. The linkage shaft 41 is rotatably connected to the other end of the movable block 47, and the driving member 42 drives the movable block 47 to rotate spirally around the rotating rod 481.

[0046] With reference to Figure 4 , Figure 5 The linkage shaft 41 and the rotation shaft 11 are coaxially fixed with elastic wheels 49. The elastic wheels 49 have a certain deformability. The gearwheel 46 on the linkage shaft 41 corresponds to the elastic wheel 49 on the linkage shaft 41, and the gearwheel 46 on the rotation shaft 11 corresponds to the elastic wheel 49 on the rotation shaft 11. The elastic wheels 49 are located on the same side of the corresponding gearwheels 46 away from the casing 1. The diameter of the elastic wheel 49 is larger than that of the gearwheel 46, and a gap 461 is left between the elastic wheel 49 on the linkage shaft 41 and the gearwheel 46 for accommodating the elastic wheel 49 on the rotation shaft 11.

[0047] With reference to Figure 1 , Figure 5 The driving member 42 is a cylinder 421, one end of the cylinder 421 is hinged on the top surface of the flat plate 16, the other end of the cylinder 421 is hinged with a moving block 422, the hinge shafts of the two ends of the cylinder 421 are parallel to the axial direction of the rotating shaft 11, the cylinder 421 is located on the side of the movable block 47 far away from the rotating shaft 11, and the moving block 422 is slidingly connected to the movable block 47 in parallel to the axial direction of the rotating shaft 11. By extending and retracting the piston rod 22 of the cylinder 421, the movable block 47 can be spirally rotated on the rotating rod 481.

[0048] With reference to Figure 4 , Figure 5 When the piston rod 22 of the cylinder 421 is retracted, the movable block 47 moves to abut against the limiting block 48 close to the shell 1, at this time, the linkage shaft 41 is arranged away from the rotating shaft 11, and the linkage shaft 41 is not in contact with the gear 46 on the rotating shaft 11 and the elastic wheel 49, at this time, the water cooling device 2 is not running. When the piston rod 22 of the cylinder 421 is extended, the movable block 47 drives the linkage shaft 41 to move towards the side of the rotating shaft 11, first, the two elastic wheels 49 abut against each other, at this time, the two gears 46 are arranged close to each other but are not in contact with each other, then the piston rod 22 of the cylinder 421 drives the linkage shaft 41 to continue to move towards the side of the rotating shaft 11, while the linkage shaft 41 moves away from the shell 1, the elastic wheel 49 on the rotating shaft 11 gradually locates in the gap 461, and the two gears 46 are in meshing connection with each other, and at the same time, the movable block 47 moves to abut against the limiting block 48 away from the shell 1, and the water cooling device 2 is running.

[0049] The driving member 42 drives the movable block 47 to spirally rotate on the rotating rod 481, and the movable block 47 can move along the axial direction of the rotating rod 481 while rotating along the rotating rod 481, by using this characteristic, the linkage shaft 41 can move along the axial direction during the movement of the linkage shaft 41 towards the side of the rotating shaft 11, so that during the movement of the linkage shaft 41 towards the side of the rotating shaft 11 driven by the driving member 42, the two elastic wheels 49 first abut against each other, at this time, the two gears 46 are close to each other, and the two elastic wheels 49 play a certain buffering role, so that the two gears 46 can slowly move close to each other, and the collision degree of the two gears 46 when they are in meshing connection can be alleviated.

[0050] With reference to Figure 4 , Figure 5When the two elastic wheels 49 abut against each other, the rotating shaft 11 drives the linkage shaft 41 to rotate synchronously. Since the gear 46 on the rotating shaft 11 always rotates with the rotating shaft 11, and the gear 46 on the linkage shaft 41 does not rotate initially, when the stationary gear 46 is directly close to the rotating gear 46, the two gears 46 will collide and rub each other intensively, thereby increasing the wear of the gears 46. Therefore, when the two elastic wheels 49 abut against each other, the rotating shaft 11 can drive the linkage shaft 41 to rotate, so that the gear 46 on the linkage shaft 41 has an initial rotating speed. Then, when the two gears 46 are close to and meshed together again, the degree of collision and wear between the two gears 46 can be reduced, thereby prolonging the service life of the gears 46.

[0051] With reference to Figure 4 , Figure 5 The elastic wheel 49 is in the shape of a circular truncated cone, the elastic wheel 49 on the linkage shaft 41 is gradually expanded from the side close to the corresponding gear 46 to the side away from the corresponding gear 46, and the elastic wheel 49 on the rotating shaft 11 is gradually contracted from the side close to the corresponding gear 46 to the side away from the corresponding gear 46. When the two elastic wheels 49 abut against each other, the circumferential outer walls of the two elastic wheels 49 abut against each other. By setting the elastic wheel 49 in the shape of a circular truncated cone, the two elastic wheels 49 form a guide surface during the movement of the rotating shaft 11, thereby making the movement of the movable block 47 and the rotating shaft 11 more smooth.

[0052] The implementation principle of the energy-saving three-phase asynchronous motor in the embodiment of the application is as follows: when the rotating speed of the motor rotating shaft 11 detected by the detection device 3 is less than a set value, the motor uses the fan 12 to cool; when the rotating speed of the motor rotating shaft 11 detected by the detection device 3 is greater than the set value, the water cooling device 2 is used to pass water into the water cooling channel from the inlet 14. The cooling water can absorb and take away part of the heat of the motor, thereby further cooling the motor on the basis of the cooling of the fan 12, and improving the heat dissipation effect of the motor at high rotating speed.

[0053] The above are preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the application should be covered by the protection scope of the application.

Claims

1. An energy-saving three-phase asynchronous motor, comprising a housing (1), wherein a rotating shaft (11) is rotatably connected to the housing (1), and a fan (12) is provided on the rotating shaft (11), characterized in that: The device includes a water cooling device (2) and a detection device (3). The housing (1) is spirally provided with a water cooling channel along the axis parallel to the rotating shaft (11). The two ends of the water cooling channel are the inlet (14) and the outlet (15), respectively. Both the inlet (14) and the outlet (15) are connected to the outside. The detection device (3) is used to detect the rotation speed of the rotating shaft (11). When the detection device (3) detects that the rotation speed of the rotating shaft (11) is greater than the set value, the water cooling device (2) is used to introduce water into the water cooling channel from the inlet (14). The water cooling device (2) includes a linkage (4), a piston (22), a bidirectional lead screw (23), an inlet pipe (25), an outlet pipe (24), and a receiving box (21) with an inner cavity (211). The receiving box (21) is connected to a motor. The piston (22) is slidably connected to the inner cavity (211) and divides the inner cavity (211) into a first cavity (2111) and a second cavity (2112) that are not interconnected. The bidirectional lead screw (23) is rotatably connected to the inner cavity (211) along a sliding direction parallel to the piston (22). The bidirectional lead screw (23) is threaded through and threaded. Connected to the piston (22), the linkage (4) drives the bidirectional lead screw (23) to rotate. The two ends of the water inlet pipe (25) are respectively connected to the first chamber (2111) and the external water source. The two ends of the water outlet pipe (24) are respectively connected to the first chamber (2111) and the inlet (14). The water inlet pipe (25) and the water outlet pipe (24) are equipped with one-way valves. The one-way valve on the water inlet pipe (25) only allows the coolant from the external water source to flow to the first chamber (2111). The one-way valve on the water outlet pipe (24) only allows the coolant in the first chamber (2111) to flow to the inlet (14). The linkage component (4) includes a linkage shaft (41), a drive component (42), a clamping wheel (43), a timing belt (44), two timing wheels (45), and two gears (46). The housing (1) is provided with a movable plate (161). The linkage shaft (41) and the double-acting screw (23) are arranged parallel to each other and are movably connected to the movable plate (161). The two timing wheels (45) are coaxially sleeved and fixed on the linkage shaft (41) and the double-acting screw (23), respectively. The timing belt (44) is wound around the two timing wheels (45). The clamping wheel (43) abuts against the timing belt (44) and is used to keep the timing belt (44) always in a taut state. The two gears (46) are coaxially fixedly connected to the rotating shaft (11) and the linkage shaft (41), respectively. The drive component (42) drives the linkage shaft (41) to be movably connected to the movable plate (161) and controls the two gears (46) to mesh and connect. It also includes a rotating rod (481), a movable block (47), and two elastic wheels (49). The two elastic wheels (49) are coaxially fixedly sleeved on the rotating shaft (11) and the linkage shaft (41), respectively. The elastic wheels (49) are located on the same side of the corresponding gear (46), and the diameter of the elastic wheel (49) is larger than the diameter of the gear (46). The rotating rod (481) is threaded through and connected to the movable block (47). Both ends of the rotating rod (481) are fixedly connected to the motor. The rotating rod (481) and the axis of the rotating shaft (11) are parallel to each other. The linkage shaft (41) is rotatably connected to the movable block (47). The driving component (42) drives the movable block (47) to rotate helically on the rotating rod (481).

2. The energy-saving three-phase asynchronous motor according to claim 1, characterized in that: The detection device (3) includes a controller, a turntable (35), a pressure sensor (31), a slider (32), and a spring (33). The turntable (35) is sleeved and coaxially fixed on the rotating shaft (11). The turntable (35) is rotatably connected inside the housing (1). A groove (34) is provided inside the turntable (35) along the axis perpendicular to the rotating shaft (11). The pressure sensor (31) is fixed at the end of the groove (34) away from the rotating shaft (11). The slider (32) is slidably connected to the groove (34) along the length of the groove (34). The two ends of the spring (33) are respectively fixed at the end of the groove (34) near the rotating shaft (11) and on the slider (32). The spring (33) is always in a compressed state. The slider (32) is always in contact with the pressure sensor (31). When the pressure detected by the pressure sensor (31) is greater than the set value, the controller controls the water cooling device (2) to operate.

3. The energy-saving three-phase asynchronous motor according to claim 1, characterized in that: A gap (461) is left between the elastic wheel (49) on the linkage shaft (41) and the gear (46) for the elastic wheel (49) on the rotating shaft (11) to be accommodated; The end of the linkage shaft (41) facing the movable plate (161) is slidably connected to an extension shaft (411) in a direction parallel to the axis of the linkage shaft (41). The extension shaft (411) is movably connected to the movable plate (161), and one of the synchronous pulleys (45) is coaxially fixedly sleeved on the extension shaft (411). When the drive member (42) drives the linkage shaft (41) to move toward the rotating shaft (11) until the two gears (46) mesh and connect, the two elastic wheels (49) first abut against each other. At this time, the two gears (46) are close to each other and do not contact each other. Then the drive member (42) drives the linkage shaft (41) to continue moving toward the rotating shaft (11). The elastic wheel (49) on the rotating shaft (11) is located in the gap (461). At this time, the two gears (46) mesh and connect with each other.

4. An energy-saving three-phase asynchronous motor according to claim 3, characterized in that: When the two elastic wheels (49) come into contact with each other, the rotating shaft (11) drives the linkage shaft (41) to rotate synchronously.

5. An energy-saving three-phase asynchronous motor according to claim 3, characterized in that: The elastic wheel (49) is arranged in a frustum shape. When two elastic wheels (49) abut against each other, the circumferential outer walls of the two elastic wheels (49) cooperate with each other. The elastic wheel (49) on the linkage shaft (41) gradually expands from the side close to the corresponding gear (46) to the side away from the corresponding gear (46).

6. An energy-saving three-phase asynchronous motor according to claim 3, characterized in that: An arc-shaped groove (162) is provided on the movable plate (161) along the movable path of the extension shaft (411), and the end of the extension shaft (411) away from the linkage shaft (41) is slidably and rotatably connected in the arc-shaped groove (162).

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