Variable-frequency three-phase asynchronous motor for water pump
By introducing heat dissipation devices and shock absorbing components into the variable frequency three-phase asynchronous motor, the high temperature problem is solved, efficient heat dissipation and shock absorption of the motor is achieved, and the service life is extended.
Patent Information
- Application Number
- CN202510305177.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-07-04
AI Technical Summary
The heat energy generated during the operation of the high-pressure water pump causes the temperature of the variable frequency three-phase asynchronous motor to rise, and the long-term high-temperature operation leads to a shortening of the motor life.
The heat dissipation device is adopted, including a transmission assembly, a curved piston and a reciprocating screw, which cools down through air flow and heat exchange, and uses the transmission assembly to reduce energy losses, and combines the shock absorbing assembly to reduce body vibration and extend service life.
Effectively reduce motor temperature, improve heat dissipation efficiency, reduce energy consumption, and extend the service life of the motor.
Smart Images
Figure CN120262784A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motors, and more particularly to a variable-frequency three-phase asynchronous motor for a water pump. Background Art
[0002] A variable-frequency three-phase asynchronous motor refers to a motor that can continuously operate at 100% rated load within the range of 10% - 100% rated speed under standard environmental conditions, and the temperature rise will not exceed the rated allowable value of the motor; the variable-frequency three-phase asynchronous motor dedicated for high-pressure water pumps can adjust the speed and power according to the actual needs of the water pump, avoiding the energy consumption waste of traditional fixed-speed motors under partial load. By precisely controlling the speed, the variable-frequency three-phase asynchronous motor can maximize the efficiency and energy efficiency of the water pump, achieving energy conservation and emission reduction.
[0003] During the operation of a high-pressure water pump, a large amount of heat energy will be generated. The high-pressure water pump transfers part of the heat energy to the variable-frequency three-phase asynchronous motor, increasing the heat energy of the variable-frequency three-phase asynchronous motor and raising the temperature, resulting in the variable-frequency three-phase asynchronous motor operating at a high temperature for a long time and being damaged, thus shortening the service life of the variable-frequency three-phase asynchronous motor. Summary of the Invention
[0004] In order to improve the problem of increased heat energy and rising temperature of the variable-frequency three-phase asynchronous motor, this application provides a variable-frequency three-phase asynchronous motor for a water pump.
[0005] A variable-frequency three-phase asynchronous motor for a water pump provided by this application adopts the following technical solutions: A variable-frequency three-phase asynchronous motor for a water pump includes a machine body, a rotating shaft, an impeller, an end cover, and a heat dissipation device. The rotating shaft is rotatably connected to the machine body. The impeller is coaxially connected to the end face of the rotating shaft protruding from the machine body. The end cover is connected to the surface of the machine body and covers the impeller. A plurality of heat dissipation holes are spaced apart on the surface of the end cover, and the heat dissipation holes communicate with the inner cavity of the end cover. The heat dissipation device includes a transmission component, an arc piston, and a reciprocating screw rod. A heat dissipation cavity for the reciprocating screw rod to rotate is provided in the machine body. The axis of the reciprocating screw rod is parallel to the axis of the rotating shaft. The transmission component is connected between the rotating shaft and the reciprocating screw rod. The transmission component can receive the power of the rotating shaft and drive the reciprocating screw rod to rotate. The arc piston is threadedly connected to the outer wall of the reciprocating screw rod. The arc piston divides the heat dissipation cavity into two heat dissipation sections. At least two air intake holes are spaced apart on the end face of the machine body, and the air intake holes correspond to and communicate with the heat dissipation sections one by one.
[0006] By adopting the above technical solution, when the variable-frequency three-phase asynchronous motor for the water pump operates, the rotating shaft drives the impeller to rotate, driving the outside air to enter the inner cavity of the end cover through the heat dissipation holes and impacting the end face of the machine body. The end face of the machine body is in full contact with the air and conducts heat exchange to achieve the cooling of the surface of the machine body. At the same time, the transmission component is connected between the rotating shaft and the reciprocating lead screw. The transmission component receives the power of the rotating shaft and drives the reciprocating lead screw to rotate. The arc-shaped piston is threadedly connected to the outer wall of the reciprocating lead screw. The arc-shaped piston divides the heat dissipation cavity into two heat dissipation sections. When the arc-shaped piston slides back and forth along the axis of the reciprocating lead screw on the inner wall of the heat dissipation cavity, the air pressure in one of the heat dissipation sections increases, and the air in the heat dissipation section is discharged through the air inlet hole. The air pressure in the other heat dissipation section decreases, and the outside air enters the heat dissipation section through the air inlet hole. The air is in full contact with the inner wall of the heat dissipation section and conducts heat exchange to realize the air flow in the heat dissipation section, thereby improving the heat dissipation efficiency of the inner cavity of the machine body, realizing the heat energy transfer from the high-pressure water pump to the machine body, making the machine body not easy to heat up, ensuring that the machine body is not easy to operate under high temperature for a long time and be damaged, and thus prolonging the service life of the variable-frequency three-phase asynchronous motor for the water pump.
[0007] Optionally, the heat dissipation device further includes at least two one-way components, which correspond to the heat dissipation sections one by one. The one-way component includes a first one-way valve and a second one-way valve. The end face of the machine body is provided with at least two air outlet holes at intervals. The air outlet holes correspond to the heat dissipation sections one by one and are communicated. The first one-way valve is connected to the inner wall of the air inlet hole, and the first one-way valve allows the outside air to enter the heat dissipation section through the air inlet hole. The second one-way valve is connected to the inner wall of the air outlet hole, and the second one-way valve allows the air in the heat dissipation section to be discharged through the air outlet hole.
[0008] By adopting the above technical solution, when the arc-shaped piston slides back and forth along the axis of the reciprocating lead screw on the inner wall of the heat dissipation cavity, the air pressure in one of the heat dissipation sections increases, and the air in the heat dissipation section is discharged from the second one-way valve through the air outlet hole. The air pressure in the other heat dissipation section decreases, and the outside air enters the heat dissipation section from the first one-way valve through the air inlet hole, increasing the contact area between the air and the inner wall of the inner cavity of the machine body, making the inner wall of the machine body in full contact with the air and conducting heat exchange, thereby improving the heat dissipation efficiency of the variable-frequency three-phase asynchronous motor for the water pump.
[0009] Optionally, the transmission component includes at least two transmission wheels and a transmission belt used in cooperation with the transmission wheels. One of the transmission wheels is coaxially connected to the end of the rotating shaft protruding from the machine body, and the other transmission wheel is coaxially connected to the end of the reciprocating lead screw protruding from the machine body. The transmission belt is tensioned and connected to the two transmission wheels.
[0010] By adopting the above technical solution, the transmission belt is tensioned and connected to the two transmission wheels. The rotation of the rotating shaft drives the rotation of the reciprocating lead screw, eliminating the need for an external power device to drive the rotation of the reciprocating lead screw, reducing energy consumption, and thus reflecting the concept of energy conservation.
[0011] Optionally, the transmission assembly further includes a thermal expansion and contraction ring. The end of the reciprocating lead screw protruding from the machine body is coaxially provided with a rotation ring cavity for the transmission wheel to rotate. The inner wall of the rotation ring cavity facing the transmission wheel is coaxially provided with a deformation cavity for accommodating the thermal expansion and contraction ring. The end face of the transmission wheel facing the deformation cavity is coaxially provided with a tightening ring cavity for the end of the thermal expansion and contraction ring to be embedded. When the thermal expansion and contraction ring heats up and expands, the end of the thermal expansion and contraction ring is embedded in the tightening ring cavity, and the surface of the thermal expansion and contraction ring abuts against the inner wall of the tightening ring cavity to form a fixation.
[0012] By adopting the above technical solution, the transmission wheel rotates around the reciprocating lead screw on the inner wall of the rotation ring cavity. When the machine body heats up and transfers heat energy to the thermal expansion and contraction ring through the reciprocating lead screw, the thermal expansion and contraction ring heats up and expands. The end of the thermal expansion and contraction ring protruding from the inner wall of the rotation ring cavity is embedded in the inner wall of the tightening ring cavity to form a fixation. The transmission wheel drives the reciprocating lead screw to rotate, realizing the directional fixation of the transmission wheel and the reciprocating lead screw, so that the reciprocating lead screw does not need to rotate all the time, reducing the wear of the reciprocating lead screw, and thus prolonging the service life of the reciprocating lead screw.
[0013] Optionally, the transmission assembly further includes a plurality of elastic strips. The plurality of elastic strips are connected to the inner wall of the tightening ring cavity at intervals. The plurality of elastic strips are spliced to form a ring and close the tightening ring cavity. When the end of the thermal expansion and contraction ring is embedded in the tightening ring cavity, the end of the thermal expansion and contraction ring squeezes the elastic strip to deform, and the surface of the thermal expansion and contraction ring clamps both sides of the elastic strip with the inner wall of the tightening ring cavity to form a fixation.
[0014] By adopting the above technical solution, the plurality of elastic strips are spliced to form a ring and close the tightening ring cavity, making it difficult for external impurities to enter the deformation cavity, thereby ensuring the cleanliness of the inner wall of the tightening ring cavity; at the same time, when the thermal expansion and contraction ring heats up and expands, the end of the thermal expansion and contraction ring is embedded in the tightening ring cavity and squeezes the elastic strip to deform. The surface of the thermal expansion and contraction ring and the inner wall of the tightening ring cavity clamp both sides of the elastic strip to form a fixation, further improving the fastening force between the transmission wheel and the reciprocating lead screw.
[0015] Optionally, the machine body is connected with a shock absorption assembly. The shock absorption assembly includes a shock absorption piston, an elastic member and a shock absorption seat. The end of the shock absorption piston is connected to the bottom of the machine body. The surface of the shock absorption seat is provided with a shock absorption cavity for the shock absorption piston to slide. One end of the elastic member in the direction of the elastic force is connected to the bottom wall of the shock absorption cavity, and the other end of the elastic member in the direction of the elastic force is connected to the surface of the shock absorption piston. The elastic member has an elastic force to drive the shock absorption piston to slide away from the shock absorption cavity.
[0016] By adopting the above technical solution, one end in the elastic force direction of the elastic member is connected to the bottom wall of the shock-absorbing cavity, and the other end in the elastic force direction of the elastic member is connected to the end face of the shock-absorbing piston. The elastic member has an elastic force to drive the shock-absorbing piston to slide away from the shock-absorbing cavity. When the machine body generates vibrations during operation, the machine body transfers the pressure to the shock-absorbing piston. The elastic member provides support for the shock-absorbing piston. The machine body transfers the pressure to the elastic member through the shock-absorbing piston. The elastic member is deformed under pressure, reducing the pressure on the machine body, thereby improving the shock-absorbing effect on the machine body.
[0017] Optionally, the shock-absorbing assembly further includes a shock-absorbing ring bladder. The outer wall of the shock-absorbing ring bladder is connected to the inner wall of the shock-absorbing cavity, and the inner wall of the shock-absorbing ring bladder can abut against the outer peripheral surface of the shock-absorbing piston to form a seal.
[0018] By adopting the above technical solution, the outer wall of the shock-absorbing ring bladder is connected to the inner wall of the shock-absorbing cavity, and the inner wall of the shock-absorbing ring bladder abuts against the outer peripheral surface of the shock-absorbing piston to form a seal. The inner wall of the shock-absorbing cavity and the outer peripheral surface of the shock-absorbing piston abut against both sides of the shock-absorbing ring bladder to form a seal. When the shock-absorbing piston slides towards the shock-absorbing cavity under the pressure of the machine body, the shock-absorbing piston squeezes the inner wall of the shock-absorbing ring bladder, and the inner wall of the shock-absorbing ring bladder is deformed under pressure, thereby reducing the wear on the shock-absorbing piston, and thus extending the service life of the variable-frequency three-phase asynchronous motor for water pumps.
[0019] Optionally, the shock-absorbing assembly further includes a connecting rod and an inflatable piston. An air flow passage for the inflatable piston to slide is provided on the end face of the shock-absorbing seat facing the machine body. The air flow passage communicates with the inner cavity of the shock-absorbing ring bladder. One end of the connecting rod is rotatably connected to the end face of the shock-absorbing piston, and the other end of the connecting rod is rotatably connected to the end face of the inflatable piston.
[0020] By adopting the above technical solution, when vibrations occur during the operation of the variable-frequency three-phase asynchronous motor for water pumps, the shock-absorbing piston slides towards the shock-absorbing cavity along the inner wall of the shock-absorbing cavity under the pressure of the machine body, driving the connecting rod to rotate, driving the inflatable piston to slide along the air flow passage towards the air flow passage, increasing the air pressure in the air flow passage. The air flow passage communicates with the inner cavity of the shock-absorbing ring bladder, and the air in the air flow passage enters the inner cavity of the shock-absorbing ring bladder. The inner wall of the shock-absorbing ring bladder is pressurized and expanded and abuts against the outer peripheral surface of the shock-absorbing piston to form a seal, making it difficult for the shock-absorbing piston to displace on the inner wall of the shock-absorbing cavity, making it difficult for the machine body to generate vibrations during operation, thereby improving the shock-absorbing effect on the machine body.
[0021] Optionally, an exhaust flow passage is provided on the end face of the shock-absorbing piston facing the shock-absorbing cavity. The exhaust flow passage penetrates through the outer wall of the shock-absorbing piston and communicates with the heat dissipation section.
[0022] By adopting the above technical solution, the exhaust passage communicates with the heat dissipation section and the shock absorption cavity. When the shock absorption piston slides along the inner wall of the shock absorption cavity towards the elastic member, the air pressure in the shock absorption cavity increases, and the air in the shock absorption cavity enters the heat dissipation section through the exhaust passage, increasing the air flow in the heat dissipation section, enabling the air to fully contact the inner wall of the heat dissipation section and perform heat exchange, thereby improving the heat dissipation efficiency of the machine body.
[0023] Optionally, the shock absorption assembly further includes a check valve three and a check valve four. The check valve three is connected to the inner wall of the exhaust passage, and the check valve three allows the air in the exhaust passage to enter the heat dissipation section. A gas supply passage is provided on the surface of the shock absorption seat, and the gas supply passage communicates with the shock absorption cavity. The check valve four is connected to the inner wall of the gas supply passage, and the check valve four allows the outside air to enter the shock absorption cavity through the gas supply passage.
[0024] By adopting the above technical solution, when the elastic force of the elastic member drives the shock absorption piston to slide away from the shock absorption cavity, the air pressure in the shock absorption cavity decreases, and the outside air enters the shock absorption cavity through the check valve four from the gas supply passage. When the shock absorption piston slides towards the shock absorption cavity under the pressure of the machine body, the air pressure in the shock absorption cavity increases, and the air in the shock absorption cavity enters the heat dissipation section through the check valve three from the exhaust passage, realizing the directional replenishment of the air in the shock absorption cavity.
[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the transmission assembly, the arc piston and the reciprocating lead screw makes the machine body not easy to heat up, ensuring that the machine body does not operate at a high temperature for a long time and is not damaged, thereby prolonging the service life of the variable frequency three-phase asynchronous motor for water pumps. 2. The setting of the check valve one and the check valve two increases the contact area between the air and the inner cavity wall of the machine body, enabling the inner wall of the machine body to fully contact the air and perform heat exchange, thereby improving the heat dissipation efficiency of the variable frequency three-phase asynchronous motor for water pumps. 3. The setting of the transmission wheel and the transmission belt eliminates the need for an external power device to drive the reciprocating lead screw to rotate, reducing energy consumption, thereby reflecting the concept of energy conservation. Description of the Drawings
[0026] Figure 1 is the overall structural schematic diagram in the embodiment of the present application.
[0027] Figure 2 is the partial sectional view in the embodiment of the present application, mainly showing the heat dissipation device.
[0028] Figure 3 is Figure 2 the enlarged view of part A in
[0029] Figure 4 is the overall structural schematic diagram in the embodiment of the present application, mainly showing the end cover.
[0030] Figure 5 It is a partial sectional view in an embodiment of the present application, mainly showing a shock absorption component.
[0031] Explanation of reference numerals: 1, body; 11, heat dissipation cavity; 111, heat dissipation section; 12, air inlet hole; 13, air outlet hole; 2, rotating shaft; 3, impeller; 4, end cover; 41, heat dissipation holes; 5, heat dissipation device; 51, transmission component; 511, thermal expansion and contraction ring; 512, elastic strip; 513, transmission wheel; 5131, abutting ring cavity; 514, transmission belt; 52, arc piston; 53, reciprocating lead screw; 531, rotating ring cavity; 532, deformation cavity; 54, one-way component; 541, one-way valve one; 542, one-way valve two; 6, shock absorption component; 61, shock absorption piston; 611, exhaust flow channel; 62, elastic member; 63, shock absorption seat; 631, shock absorption cavity; 632, air charging flow channel; 633, air supply flow channel; 64, shock absorption ring capsule; 65, connecting rod; 66, air charging piston; 67, one-way valve three; 68, one-way valve four. Detailed implementation manners
[0032] The following will further elaborate on the present application in conjunction with the attached Figures 1-5 drawings.
[0033] An embodiment of the present application discloses a variable-frequency three-phase asynchronous motor for a water pump. Referring to Figure 1 and Figure 2 , a variable-frequency three-phase asynchronous motor for a water pump includes a body 1, a rotating shaft 2, an impeller 3, an end cover 4 and a heat dissipation device 5. The rotating shaft 2 is rotatably connected to the body 1. The impeller 3 is coaxially fixed to the end of the rotating shaft 2 protruding from the body 1. The end cover 4 is fixed to the surface of the body 1 by bolts and covers the impeller 3. A plurality of heat dissipation holes 41 are spaced apart on the end face of the end cover 4. The axes of the heat dissipation holes 41 are parallel to the axis of the rotating shaft 2. The heat dissipation holes 41 penetrate the outer wall of the end cover 4 along their own axes and communicate with the inner cavity of the end cover 4. When the rotating shaft 2 drives the impeller 3 to rotate, it drives the outside air to enter the inner cavity of the end cover 4 through the heat dissipation holes 41 to fully contact the end face of the body 1 and perform heat exchange, realizing the cooling of the surface of the body 1. And the heat dissipation device 5 is connected to the surface of the body 1, and the heat dissipation device 5 can cool the inner wall of the body 1, thereby improving the heat dissipation efficiency of the inner cavity of the body 1, realizing the heat energy transfer from the high-pressure water pump to the body 1, making the body 1 not easy to heat up, ensuring that the body 1 is not easy to operate at a high temperature for a long time and be damaged, and thus extending the service life of the variable-frequency three-phase asynchronous motor for the water pump.
[0034] Referring to Figure 2 and Figure 3, the heat dissipation device 5 includes a transmission component 51, an arc-shaped piston 52, a reciprocating lead screw 53, and at least two one-way components 54. A heat dissipation cavity 11 for the reciprocating lead screw 53 to rotate is formed in the body 1. The axis of the reciprocating lead screw 53 is parallel to the axis of the rotating shaft 2. In the embodiment of the present application, the heat dissipation cavity 11 is an arc-shaped cavity, the axis of the arc-shaped cavity coincides with the axis of the rotating shaft 2, and the heat dissipation cavity 11 is close to the inner cavity of the body 1. One end of the reciprocating lead screw 53 penetrates the inner wall of the heat dissipation cavity 11 and is located in the inner cavity of the end cover 4. The transmission component 51 is connected between the rotating shaft 2 and the reciprocating lead screw 53. The transmission component 51 can receive the power of the rotating shaft 2 and drive the reciprocating lead screw 53 to rotate, eliminating the need for an external power device to drive the reciprocating lead screw 53 to rotate, reducing energy loss, and thus reflecting the concept of energy conservation.
[0035] Referring to Figure 2 and Figure 3 , the transmission component 51 includes a thermal expansion and contraction ring 511, a plurality of elastic strips 512, at least two transmission wheels 513, and a transmission belt 514 used in cooperation with the transmission wheels 513. One of the transmission wheels 513 is coaxially fixed to the end of the rotating shaft 2 protruding from the body 1. A rotating ring cavity 531 for the transmission wheel 513 to rotate is coaxially formed at the end of the reciprocating lead screw 53 protruding from the body 1. The transmission belt 514 is tensioned and connected to the two transmission wheels 513; the material of the thermal expansion and contraction ring 511 can be shape memory alloy or nylon. In the embodiment of the present application, the material of the thermal expansion and contraction ring 511 is shape memory alloy, which has a good coefficient of thermal expansion. A deformation cavity 532 for accommodating the thermal expansion and contraction ring 511 is coaxially formed on the inner wall of the rotating ring cavity 531 facing the end face of the transmission wheel 513. A pressing ring cavity 5131 for the end of the thermal expansion and contraction ring 511 to be embedded is coaxially formed on the end face of the transmission wheel 513 facing the deformation cavity 532.
[0036] Referring to Figure 2 and Figure 3, the material of the elastic strip 512 can be rubber or silica gel. In the embodiment of the present application, the material of the elastic strip 512 is rubber, which has a certain deformation ability. A plurality of elastic strips 512 are spaced and connected to the inner wall of the abutting ring cavity 5131 close to the deformation cavity 532. The plurality of elastic strips 512 are spliced to form a ring and close the abutting ring cavity 5131, making it difficult for external impurities to enter the abutting ring cavity 5131, thereby ensuring the cleanliness inside the abutting ring cavity 5131; when the temperature of the machine body 1 rises and part of the heat energy is transferred to the thermal expansion and contraction ring 511 through the reciprocating lead screw 53 by heat conduction, the thermal expansion and contraction ring 511 heats up and expands. The end of the thermal expansion and contraction ring 511 protruding from the inner wall of the rotating ring cavity 531 is embedded into the abutting ring cavity 5131. The end face of the thermal expansion and contraction ring 511 presses the elastic strip 512, and the elastic strip 512 is deformed under pressure. The surface of the thermal expansion and contraction ring 511 and the inner wall of the abutting ring cavity 5131 clamp both sides of the elastic strip 512 to form a fixation, realizing the directional fixation between the synchronous pulley and the reciprocating lead screw 53, enabling the reciprocating lead screw 53 not to always maintain an operating state, reducing the wear of the reciprocating lead screw 53, and thus prolonging the service life of the variable-frequency three-phase asynchronous motor for water pumps.
[0037] Refer to Figure 2 and Figure 3 , the material of the arc-shaped piston 52 can be rubber or silica gel. In the embodiment of the present application, the material of the arc-shaped piston 52 is rubber, which has a certain deformation ability. The arc-shaped piston 52 is threadedly connected to the outer wall of the reciprocating lead screw 53. The arc-shaped piston 52 slides back and forth along the axis of the reciprocating lead screw 53 on the inner wall of the heat dissipation cavity 11. The outer peripheral surface of the arc-shaped piston 52 abuts against the inner wall of the heat dissipation cavity 11 to form a seal. The arc-shaped piston 52 divides the heat dissipation cavity 11 into two heat dissipation sections 111. Air inlet holes 12 are provided at both ends of the machine body 1 in the axial direction. The air inlet holes 12 correspond to and communicate with the heat dissipation sections 111 one by one, promoting the air flow in the heat dissipation sections 111. The inner wall of the heat dissipation section 111 is in full contact with the air and conducts heat exchange, realizing the cooling of the inner cavity of the machine body 1, and thus improving the heat dissipation efficiency of the machine body 1.
[0038] Refer to Figure 2 and Figure 3 , the one-way components 54 correspond to the heat dissipation sections 111 one by one. The one-way components 54 can control the one-way flow of the air in the heat dissipation sections 111. The one-way components 54 include a one-way valve one 541 and a one-way valve two 542. Air outlet holes 13 are provided at both ends of the machine body 1 in the axial direction. The air outlet holes 13 correspond to and communicate with the heat dissipation sections 111 one by one. The one-way valve one 541 is installed on the inner wall of the air inlet hole 12, and the one-way valve one 541 allows the outside air to enter the heat dissipation section 111 through the air inlet hole 12. The one-way valve two 542 is installed on the inner wall of the air outlet hole 13, and the one-way valve two 542 allows the air in the heat dissipation section 111 to be discharged through the air outlet hole 13.
[0039] Refer to Figure 2 and Figure 3, when the arc-shaped piston 52 slides back and forth along the axis of the reciprocating screw rod 53 on the inner wall of the heat dissipation cavity 11, the air pressure in one of the heat dissipation sections 111 increases, and the air in the heat dissipation section 111 is discharged from the air outlet hole 13 through the check valve II 542. At the same time, the air pressure in the other heat dissipation section 111 decreases, and the outside air enters the heat dissipation section 111 from the air inlet hole 12 through the check valve I 541, increasing the contact area between the air and the inner wall of the machine body 1, promoting the air flow in the heat dissipation section 111, enabling the air to fully contact the inner wall of the heat dissipation section 111 and conduct heat exchange, thereby improving the cooling efficiency of the machine body 1, preventing the machine body 1 from operating at a high temperature and being damaged, and thus extending the service life of the variable-frequency three-phase asynchronous motor for the water pump.
[0040] Refer to Figure 4 and Figure 5 , the machine body 1 is equipped with a shock absorption assembly 6. The shock absorption assembly 6 can reduce the vibration generated during the operation of the machine body 1. The number of shock absorption assemblies 6 can be one, two, or more. In the embodiment of the present application, the number of shock absorption assemblies 6 is two. The two shock absorption assemblies 6 are respectively connected to the two ends of the machine body 1 facing the ground in the width direction. The shock absorption assembly 6 includes a shock absorption piston 61, an elastic member 62, a shock absorption seat 63, a shock absorption ring bladder 64, a connecting rod 65, an air-filled piston 66, a check valve III 67, and a check valve IV 68. The material of the shock absorption piston 61 can be rubber or silica gel. In the embodiment of the present application, the material of the shock absorption piston 61 is rubber, which has a certain deformation ability. The end of the shock absorption piston 61 is fixed to the end face of the machine body 1 facing the ground. One end of the shock absorption seat 63 is provided with a shock absorption cavity 631 for the shock absorption piston 61 to slide. The other end of the shock absorption seat 63 abuts against the ground to form a support. The sliding direction of the shock absorption piston 61 is parallel to the height direction of the machine body 1. The outer peripheral surface of the shock absorption piston 61 abuts tightly against the inner wall of the shock absorption cavity 631 to form a seal. The elastic member 62 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 62 is a compression spring, which has a certain deformation ability. One end of the elastic member 62 in the direction of the elastic force is connected to the bottom wall of the shock absorption cavity 631, and the other end of the elastic member 62 in the direction of the elastic force is connected to the end face of the shock absorption piston 61. The elastic member 62 has an elastic force to drive the shock absorption piston 61 to slide in a direction away from the shock absorption cavity 631, and there is a tendency for the end of the shock absorption piston 61 to protrude from the surface of the shock absorption seat 63.
[0041] Refer to Figure 4 and Figure 5 , the material of the shock absorption ring bladder 64 can be rubber or silica gel. In the embodiment of the present application, the material of the shock absorption ring bladder 64 is rubber, which has a certain deformation ability. The outer peripheral wall of the shock absorption ring bladder 64 is fixed to the inner wall of the shock absorption cavity 631, and the inner peripheral wall of the shock absorption ring bladder 64 abuts tightly against the outer peripheral surface of the shock absorption piston 61 to form a seal. When the shock absorption piston 61 slides on the inner wall of the shock absorption cavity 631, the shock absorption ring bladder 64 is deformed by the extrusion of the shock absorption piston 61, reducing the wear on the shock absorption piston 61, and thus extending the service life of the variable-frequency three-phase asynchronous motor for the water pump.
[0042] Referring to Figure 4 and Figure 5 Figure 5 , the material of the inflatable piston 66 can be rubber or silica gel. In the embodiment of the present application, the material of the inflatable piston 66 is rubber, which has a certain deformation ability. An air flow passage 632 for the inflatable piston 66 to slide is provided on the end face of the shock-absorbing seat 63 facing the body 1. The sliding direction of the inflatable piston 66 is parallel to the axis of the rotating shaft 2. The air flow passage 632 communicates with the inner cavity of the shock-absorbing ring bladder 64. One end of the connecting rod 65 is rotatably connected to the end face of the shock-absorbing piston 61, and the other end of the connecting rod 65 is rotatably connected to the end face of the inflatable piston 66. When the shock-absorbing piston 61 slides in the direction close to the shock-absorbing cavity 631 under the pressure of the body 1, the connecting rod 65 rotates, driving the inflatable piston 66 close to the air flow passage 632, the air pressure in the air flow passage 632 increases, and the air in the air flow passage 632 enters the inner cavity of the shock-absorbing ring bladder 64. The inner circumferential wall of the shock-absorbing ring bladder 64 is pressurized and expanded to abut against the outer peripheral surface of the shock-absorbing piston 61 to form a limit, so that the shock-absorbing piston 61 is not easily slid on the inner wall of the shock-absorbing cavity 631 under the pressure of the body 1, thereby improving the shock-absorbing effect on the body 1.
[0043] Referring to Figure 4 and Figure 5 Figure 5 , an exhaust flow passage 611 is provided on the end face of the shock-absorbing piston 61 facing the elastic member 62. The depth direction of the exhaust flow passage 611 penetrates the surface of the shock-absorbing piston 61 and communicates with the heat dissipation cavity 11. The exhaust flow passage 611 communicates with the heat dissipation cavity 11 and the shock-absorbing cavity 631. The check valve three 67 is installed on the inner wall of the exhaust flow passage 611. The check valve three 67 allows the air in the exhaust flow passage 611 to enter the heat dissipation cavity 11. An air supply flow passage 633 is provided on the surface of the shock-absorbing seat 63 facing the body 1. The air supply flow passage 633 communicates with the shock-absorbing cavity 631. The check valve four 68 is connected to the inner wall of the air supply flow passage 633. The check valve four 68 allows the outside air to enter the shock-absorbing cavity 631 through the air supply flow passage 633.
[0044] Referring to Figure 4 and Figure 5 Figure 5 , when the body 1 vibrates during operation, the shock-absorbing piston 61 slides along the inner wall of the shock-absorbing cavity 631 in the direction close to the elastic member 62 under the pressure of the body 1. The elastic member 62 is deformed under the pressure of the shock-absorbing piston 61 to realize the conversion of the pressure on the shock-absorbing piston 61. At the same time, the connecting rod 65 rotates, driving the inflatable piston 66 close to the air flow passage 632, the air pressure in the air flow passage 632 increases, and the air in the air flow passage 632 enters the inner cavity of the shock-absorbing ring bladder 64. The inner circumferential wall of the shock-absorbing ring bladder 64 is pressurized and expanded to abut against the outer peripheral surface of the shock-absorbing piston 61 to form a limit, so that the shock-absorbing piston 61 is not easily displaced on the inner wall of the shock-absorbing cavity 631, thereby improving the shock-absorbing effect on the variable-frequency three-phase asynchronous motor for water pump.
[0045] Referring to Figure 4 and Figure 5Meanwhile, the air pressure in the shock absorption chamber 631 increases. The air in the shock absorption chamber 631 enters the heat dissipation chamber 11 from the check valve three 67 through the exhaust flow channel 611, further driving the air flow in the heat dissipation chamber 11, enabling the inner wall of the heat dissipation chamber 11 to be in full contact with the air and conduct heat exchange, thereby improving the heat dissipation efficiency of the variable-frequency three-phase asynchronous motor for the water pump. When the elastic force of the elastic member 62 drives the shock absorption piston 61 to slide along the inner wall of the shock absorption chamber 631 in a direction away from the elastic member 62, the air pressure in the shock absorption chamber 631 decreases. The outside air enters the shock absorption chamber 631 from the check valve four 68 through the air supply flow channel 633, realizing the directional replenishment of the air in the shock absorption chamber 631. At the same time, the opening of the air supply flow channel 633 faces the surface of the machine body 1, driving the air flow on the surface of the machine body 1, enabling the air to be in full contact with the surface of the machine body 1 and conduct heat exchange, further improving the heat dissipation efficiency of the variable-frequency three-phase asynchronous motor for the water pump.
[0046] The implementation principle of the variable-frequency three-phase asynchronous motor for the water pump in the embodiment of the present application is as follows: When the variable-frequency three-phase asynchronous motor for the water pump operates, the rotating shaft 2 drives the impeller 3 to rotate, driving the outside air to enter the inner cavity of the end cover 4 through the heat dissipation holes 41 and impact the end face of the machine body 1. The end face of the machine body 1 is in full contact with the air and conducts heat exchange, realizing the cooling of the surface of the machine body 1. Meanwhile, the transmission assembly 51 is connected between the rotating shaft 2 and the reciprocating lead screw 53. The transmission assembly 51 receives the power of the rotating shaft 2 and drives the reciprocating lead screw 53 to rotate. The arc-shaped piston 52 is threadedly connected to the outer wall of the reciprocating lead screw 53. The arc-shaped piston 52 divides the heat dissipation chamber 11 into two heat dissipation sections 111. When the arc-shaped piston 52 slides back and forth along the axis of the reciprocating lead screw 53 on the inner wall of the heat dissipation chamber 11, the air pressure in one of the heat dissipation sections 111 increases, and the air in the heat dissipation section 111 is discharged through the air inlet hole 12. The air pressure in the other heat dissipation section 111 decreases, and the outside air enters the heat dissipation section 111 through the air inlet hole 12. The air is in full contact with the inner wall of the heat dissipation section 111 and conducts heat exchange, realizing the air flow in the heat dissipation section 111, thereby improving the heat dissipation efficiency of the inner cavity of the machine body 1, realizing the heat energy transfer from the high-pressure water pump to the machine body 1, making the machine body 1 not easy to heat up, ensuring that the machine body 1 is not easy to operate for a long time in a high-temperature state and be damaged, and thus extending the service life of the variable-frequency three-phase asynchronous motor for the water pump.
[0047] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A variable-frequency three-phase asynchronous motor for a water pump, characterized in that: It includes a body (1), a rotating shaft (2), an impeller (3), an end cover (4) and a heat dissipation device (5). The rotating shaft (2) is rotatably connected to the body (1). The impeller (3) is coaxially connected to the end face of the rotating shaft (2) protruding from the body (1). The end cover (4) is connected to the surface of the body (1) and covers the impeller (3). A plurality of heat dissipation holes (41) are spaced apart on the surface of the end cover (4). The heat dissipation holes (41) communicate with the inner cavity of the end cover (4). The heat dissipation device (5) includes a transmission component (51), an arc piston (52) and a reciprocating lead screw (53). A heat dissipation cavity (11) for the reciprocating lead screw (53) to rotate is formed in the body (1). The axis of the reciprocating lead screw (53) is parallel to the axis of the rotating shaft (2). The transmission component (51) is connected between the rotating shaft (2) and the reciprocating lead screw (53). The transmission component (51) can receive the power of the rotating shaft (2) and drive the reciprocating lead screw (53) to rotate. The arc piston (52) is threadedly connected to the outer wall of the reciprocating lead screw (53). The arc piston (52) divides the heat dissipation cavity (11) into two heat dissipation segments (111). At least two air inlet holes (12) are spaced apart on the end face of the body (1). The air inlet holes (12) correspond to and communicate with the heat dissipation segments (111) one by one.
2. The variable-frequency three-phase asynchronous motor for a water pump according to claim 1, wherein: The heat dissipation device (5) further includes at least two one-way components (54). The one-way components (54) correspond to the heat dissipation segments (111) one by one. The one-way component (54) includes a one-way valve one (541) and a one-way valve two (542). At least two air outlet holes (13) are spaced apart on the end face of the body (1). The air outlet holes (13) correspond to and communicate with the heat dissipation segments (111) one by one. The one-way valve one (541) is connected to the inner wall of the air inlet hole (12). The one-way valve one (541) allows outside air to enter the heat dissipation segment (111) through the air inlet hole (12). The one-way two is connected to the inner wall of the air outlet hole (13). The one-way valve two (542) allows the air in the heat dissipation segment (111) to be discharged through the air outlet hole (13).
3. A variable-frequency three-phase asynchronous motor for a water pump according to claim 1, characterized in that: The transmission component (51) includes at least two transmission wheels (513) and a transmission belt (514) used in cooperation with the transmission wheels (513). One of the transmission wheels (513) is coaxially connected to the end of the rotating shaft (2) protruding from the body (1). The other transmission wheel (513) is coaxially connected to the end of the reciprocating lead screw (53) protruding from the body (1). The transmission belt (514) is tensioned and connected to the two transmission wheels (513).
4. A variable-frequency three-phase asynchronous motor for a water pump according to claim 3, characterized in that: The transmission assembly (51) further includes a thermal expansion and contraction ring (511). The end of the reciprocating lead screw (53) protruding from the machine body (1) is coaxially provided with a rotating ring cavity (531) for the transmission wheel (513) to rotate. The inner wall of the rotating ring cavity (531) facing the transmission wheel (513) is coaxially provided with a deformation cavity (532) for accommodating the thermal expansion and contraction ring (511). The end face of the transmission wheel (513) facing the deformation cavity (532) is coaxially provided with a tightening ring cavity (5131) for the end of the thermal expansion and contraction ring (511) to be embedded. When the thermal expansion and contraction ring (511) heats up and expands, the end of the thermal expansion and contraction ring (511) is embedded into the tightening ring cavity (5131), and the surface of the thermal expansion and contraction ring (511) abuts against the inner wall of the tightening ring cavity (5131) to form a fixation.
5. A variable-frequency three-phase asynchronous motor for a water pump according to claim 4, characterized in that: The transmission assembly (51) further includes a plurality of elastic strips (512). The plurality of elastic strips (512) are connected to the inner wall of the tightening ring cavity (5131) at intervals. The plurality of elastic strips (512) are spliced to form a circular ring and close the tightening ring cavity (5131). When the end of the thermal expansion and contraction ring (511) is embedded into the tightening ring cavity (5131), the end of the thermal expansion and contraction ring (511) squeezes the elastic strips (512) to deform, and the surface of the thermal expansion and contraction ring (511) clamps both sides of the elastic strips (512) with the inner wall of the tightening ring cavity (5131) to form a fixation.
6. A variable-frequency three-phase asynchronous motor for a water pump according to claim 2, characterized in that: The machine body (1) is connected with a shock absorption assembly (6). The shock absorption assembly (6) includes a shock absorption piston (61), an elastic member (62), and a shock absorption seat (63). The end of the shock absorption piston (61) is connected to the bottom of the machine body (1). The surface of the shock absorption seat (63) is provided with a shock absorption cavity (631) for the shock absorption piston (61) to slide. One end of the elastic member (62) in the direction of its elastic force is connected to the bottom wall of the shock absorption cavity (631), and the other end of the elastic member (62) in the direction of its elastic force is connected to the surface of the shock absorption piston (61). The elastic member (62) has an elastic force to drive the shock absorption piston (61) to slide in a direction away from the shock absorption cavity (631).
7. A variable-frequency three-phase asynchronous motor for a water pump according to claim 6, characterized in that: The shock absorption assembly (6) further includes a shock absorption ring capsule (64). The outer wall of the shock absorption ring capsule (64) is connected to the inner wall of the shock absorption cavity (631), and the inner wall of the shock absorption ring capsule (64) can abut against the outer peripheral surface of the shock absorption piston (61) to form a seal.
8. A variable-frequency three-phase asynchronous motor for a water pump according to claim 7, characterized in that: The shock absorption assembly (6) further includes a connecting rod (65) and an air filling piston (66). The end face of the shock absorption seat (63) facing the machine body (1) is provided with an air filling flow channel (632) for the air filling piston (66) to slide. The air filling flow channel (632) communicates with the inner cavity of the shock absorption ring capsule (64). One end of the connecting rod (65) is rotatably connected to the end face of the shock absorption piston (61), and the other end of the connecting rod (65) is rotatably connected to the end face of the air filling piston (66).
9. A variable-frequency three-phase asynchronous motor for a water pump according to claim 6, characterized in that: The end face of the shock absorption piston (61) facing the shock absorption cavity (631) is provided with an exhaust flow channel (611). The exhaust flow channel (611) penetrates through the outer wall of the shock absorption piston (61) and communicates with the heat dissipation section (111).
10. A variable-frequency three-phase asynchronous motor for a water pump according to claim 9, characterized in that: The shock absorption assembly (6) further includes a check valve three (67) and a check valve four (68). The check valve three (67) is connected to the inner wall of the exhaust flow channel (611), and the check valve three (67) allows air in the exhaust flow channel (611) to enter the heat dissipation section (111). A supply air flow channel (633) is formed on the surface of the shock absorption seat (63), and the supply air flow channel (633) communicates with the shock absorption cavity (631). The check valve four (68) is connected to the inner wall of the supply air flow channel (633), and the check valve four (68) allows outside air to enter the shock absorption cavity (631) through the supply air flow channel (633).