CN106329832A - Water-cooled radiation outer rotor circular-winding induction machine and motor shaft assembly method - Google Patents

Abstract

Traditional external rotor motors have low wire utilization and large end leakage reactance, which affects efficiency and torque. A method for assembling a water-cooled and heat-dissipating outer-rotor ring-winding induction motor and a motor shaft, comprising: a motor shaft, a motor shaft (1) including a shaft forging (1-7) and a shaft sleeve (1-5), and a shaft forging The outer surface has an "S"-shaped groove (1-2), and the shaft sleeve is wrapped in an interference fit outside the "S"-shaped groove of the shaft forging, forming an "S"-shaped water-cooling channel inside the motor shaft, and the stator is installed on the shaft sleeve ( 2), the annular winding (3) of the motor is wound in the inner and outer tooth slots of the stator, and each turn of the annular winding is wound in the inner and outer tooth slots of the stator and closed by the back of the stator yoke, and the rotor (4) is installed outside the stator, and the rotor There is an air gap between the rotor and the stator, the rotor is equipped with a sleeve, and the outer wall of the sleeve is covered with an anti-skid layer. The invention applies to the assembly method of the outer rotor annular winding induction motor and the motor shaft applied to water cooling and heat dissipation.

Description

Water-cooled and heat-dissipating outer rotor ring-winding induction motor and assembly method of motor shaft

Technical field:

The application of the present invention relates to the field of motor manufacturing, and is particularly applied to an outer rotor ring winding induction motor with water cooling and heat dissipation and an assembly method of a motor shaft.

Background technique:

In the mechanical power system, the special structure of the external rotor motor enables it to provide greater torque output for the mechanical system, and at the same time can directly drive the load to run, saving the mechanical transmission required by the traditional motor, thereby saving costs and reducing machinery. The overall volume of the device; the windings of the current outer rotor induction motors basically use traditional stacked windings or drum windings. Since the outer rotor motors mainly provide power, the motors are basically in the form of large diameters and short axes. In this case, the use of traditional windings will increase the use of copper, and the utilization rate of the wires is relatively low. The leakage reactance at the end is large, which affects the efficiency and torque of the motor and increases the manufacturing cost, and the user's use cost will also increase, which is not conducive to cost. The reduction, energy saving and environmental protection, the outer ring winding induction motor with water cooling and heat dissipation can solve this problem very well.

Invention content:

The object of the present invention is to provide a water-cooled and heat-dissipating outer rotor ring winding induction motor and an assembly method for the motor shaft.

Above-mentioned purpose realizes by following technical scheme:

1. A water-cooled and heat-dissipating outer rotor annular winding induction motor, which consists of: a motor shaft, the motor shaft includes a shaft forging and a shaft sleeve, the outer surface of the shaft forging has an "S" shaped groove, the The interference fit of the shaft sleeve is wrapped outside the "S" shaped groove of the shaft forging, and an "S" shaped water cooling channel is formed inside the motor shaft. The stator is installed on the shaft sleeve, and the inner and outer tooth grooves of the stator are wound The ring winding of the motor, each turn of the ring winding is wound in the stator, the outer tooth slot and closed by the back of the stator yoke, the rotor is installed outside the stator, and there is an air gap between the rotor and the stator , the rotor is equipped with a sleeve, and the outer wall of the sleeve is covered with an anti-skid layer.

In the water-cooled and heat-dissipating outer rotor annular winding induction motor, the two ends of the shaft sleeve sleeved by the shaft forging are respectively equipped with an end seal ring A and an end seal ring B, and the end of the motor shaft has two inlets and outlets. A water hole, the outside of the water inlet and outlet holes is connected with a water supply and drainage device, the inner side of the motor shaft has an outlet hole for placing a power line, the stator has internal teeth and external teeth, and the number of internal teeth The same number of external teeth as described.

The method for assembling the motor shaft of the water-cooled and heat-dissipating outer rotor ring-winding induction motor includes: (1) processing the water inlet and outlet holes, wire outlet holes and "S"-shaped grooves of the shaft forging according to the design requirements; (2) according to the design requirements; The design requires that the shaft sleeve be processed to ensure the machining allowance of the inner hole and outer circle; (3) According to the design requirements, use suitable assembly equipment to assemble the shaft forging and the shaft sleeve together, and ensure the installation accuracy and tightness, both Ensure the tightness of the "S"-shaped water-cooling channel; (4) Use end seal ring A and end seal ring B at both ends of the shaft sleeve on the shaft forging to further protect the seal of the shaft sleeve; (5 ) Then assemble the stator wound with ring winding with suitable assembly equipment and shaft sleeve; (6) Finally, assemble the rotor, sleeve and anti-skid layer to form a complete outer rotor ring winding induction motor.

Beneficial effects of the present invention:

1. The induction motor of the present invention adopts a new type of motor shaft. Taking the air-conditioning fan as an example, compared with the traditional outer rotor induction motor using drum windings, the amount of ring winding copper wire used is 80% of the original, Copper wire usage is drastically reduced and efficiency is increased.

1. The induction motor of the present invention adopts the motor shaft of water-cooled structure. Due to the large specific heat capacity of water, compared with the motor shaft without cooling or air cooling, the internal temperature of the motor can be greatly reduced, and on the basis of ensuring the structural strength, a special The motor shaft structure can directly contact with the motor winding to take away the heat, which makes the heat dissipation effect more prominent. In the design of the motor, a higher electromagnetic load and thermal load can be selected, which improves the efficiency of the motor and reduces the volume of the motor. It can also improve the service life of the motor and the reliability of operation, and the economic effect is obvious.

1. The induction motor of the present invention adopts toroidal winding, which breaks through the concept of pitch in the traditional winding form compared with the traditional toroidal winding, and can more flexibly realize pole changing without power electronic devices.

1. The induction motor of the present invention can greatly improve the slot fullness rate compared with the traditional induction motor without interlayer insulation and is convenient to go off the assembly line. In the ring winding induction motor, the slot fullness rate in the stator slot is 85%-90% %.

Description of drawings:

Accompanying drawing 1 is the structure schematic diagram of the ring winding induction motor of the present invention.

Accompanying drawing 2 is the three-dimensional structure diagram of the inner stator of the present invention.

Accompanying drawing 3 is the three-dimensional structure diagram of the outer rotor of the present invention.

Accompanying drawing 4 is the structural sectional view of the motor shaft of the present invention.

Accompanying drawing 5 is the exploded schematic view of the novel motor shaft structure of the present invention.

Accompanying drawing 6 is the connection schematic diagram of the shaft forging and the shaft sleeve of the novel motor shaft of the present invention.

In the figure: 1—motor shaft; 1-1—end sealing ring A; 1-2—"S" shaped groove; 1-3—outlet hole; 1-4—inlet and outlet hole; 1-5—shaft sleeve; 1-6 —end sealing ring B; 1-7 —shaft forging; 2 —stator; 3 —ring winding; 4 —rotor;

detailed description:

Example 1:

A water-cooled and heat-dissipating outer rotor ring-winding induction motor, which consists of: a motor shaft, the motor shaft 1 includes a shaft forging 1-7 and a shaft sleeve 1-5, and the outer surface of the shaft forging has "S" Shaped groove 1-2, the shaft sleeve interference fit is wrapped outside the "S" shaped groove of the shaft forging, an "S" shaped water cooling channel is formed inside the motor shaft, the stator 2 is installed on the shaft sleeve, and the The annular winding 3 of the motor is wound in the inner and outer tooth slots of the stator, and each turn of the annular winding is wound in the inner and outer tooth slots of the stator and closed by the back of the stator yoke, and the rotor 4 is installed outside the stator, There is an air gap between the rotor and the stator, the rotor is equipped with a sleeve, and the outer wall of the sleeve is covered with an anti-skid layer.

Example 2:

According to the water-cooled and heat-dissipating outer rotor annular winding induction motor described in Embodiment 1, the two ends of the shaft sleeve sleeved by the shaft forging are respectively installed with an end seal ring A1-1 and an end seal ring B1-6. There are two water inlet and outlet holes 1-4 at the end of the motor shaft, and the outside of the water inlet and outlet holes is connected with a water supply and drainage device. The stator has internal teeth and external teeth, and the number of the internal teeth is the same as the number of the external teeth.

Example 3:

According to the method for assembling the motor shaft of the water-cooled and heat-dissipating outer rotor ring-winding induction motor described in Embodiment 2, the steps are: (1) process the water inlet and outlet holes, wire outlet holes and "S" shaped grooves of the shaft forging according to the design requirements; (2) Process the shaft sleeve according to the design requirements to ensure the machining allowance of the inner hole and the outer circle; (3) According to the design requirements, use suitable assembly equipment to assemble the shaft forgings and the shaft sleeve together, and ensure the installation accuracy and Sealing, not only to ensure the sealing of the "S"-shaped water cooling channel; (4) Use end sealing ring A and end sealing ring B at both ends of the shaft sleeve on the shaft forging to further improve the sealing performance of the shaft sleeve protection; (5) Then assemble the stator wound with the annular winding with suitable assembly equipment and the shaft sleeve; (6) Finally, assemble the rotor, sleeve and anti-skid layer to form a complete outer rotor annular winding induction motor.

Claims (3)

1. A water-cooled and heat-dissipating outer rotor annular winding induction motor, which comprises: a motor shaft, characterized in that: the motor shaft includes a shaft forging and a shaft sleeve, and the outer surface of the shaft forging has an "S" shape Slot, the interference fit of the shaft sleeve is wrapped on the outside of the "S" shaped groove of the shaft forging, and an "S" shaped water cooling channel is formed inside the motor shaft. The stator is installed on the shaft sleeve, and the inside and outside of the stator The annular winding of the motor is wound in the tooth slot. Each turn of the annular winding is wound inside the stator, in the outer tooth slot and closed by the back of the stator yoke. The rotor is installed outside the stator. Between the rotor and the stator There is an air gap between them, the rotor is equipped with a sleeve, and the outer wall of the sleeve is covered with an anti-skid layer. 2. The water-cooled and heat-dissipating outer rotor annular winding induction motor according to claim 1, characterized in that: the two ends of the shaft sleeve sleeved by the shaft forging are respectively equipped with an end seal ring A and an end seal ring B, so that There are two water inlet and outlet holes at the end of the motor shaft, and the water supply and drainage devices are connected to the outside of the water inlet and outlet holes. and external teeth, the number of internal teeth is the same as the number of external teeth. 3. A method for assembling the motor shaft of the water-cooled and heat-dissipating outer-rotor ring-winding induction motor as claimed in any one of claims 1 and 2, characterized in that: the steps are: (1) process the inlet and outlet water of the shaft forging according to the design requirements (2) Process the shaft sleeve according to the design requirements to ensure the machining allowance of the inner hole and the outer circle; (3) According to the design requirements, use suitable assembly equipment to assemble the shaft forgings and shaft sleeves The cylinders are assembled together, and the installation accuracy and tightness must be ensured, which not only ensures the tightness of the "S"-shaped water cooling channel; (4) Use the end seal ring A and the end seal ring at both ends of the shaft sleeve on the shaft forging B further protect the sealing of the shaft sleeve; (5) Then assemble the stator with the annular winding wound with the shaft sleeve with suitable assembly equipment; (6) Finally, assemble the rotor, sleeve and anti-skid layer Assembled to form a complete outer rotor toroidal winding induction motor.