Rotor punching sheet
By setting a U-shaped partition in the rotor punch and adjusting the extreme width of the winding groove, the problems of poor heat dissipation performance and insufficient mechanical strength of the rotor punch in the prior art are solved, and more efficient heat dissipation and mechanical performance are achieved, the efficiency of the motor and steel utilization rate are improved, and the cost is reduced.
Patent Information
- Application Number
- CN202420081936.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-01-12
AI Technical Summary
In the prior art, the heat dissipation area of the rotor punching plate is reduced and the heat dissipation performance is poor, resulting in an increase in the eddy current loss of the motor. The rotor extreme width is set to 58mm and the rotor outer diameter is set to Φ122. The steel utilization rate of the rotor sheet is low, the magnetic flux is poor, and the mechanical strength is weakened, which leads to the motor being extremely prone to deformation, friction damage, temperature rise and efficiency decreases during high-speed operation.
A rotor punching piece is designed, and U-shaped ventilation is achieved by setting a U-shaped partition between two symmetrical winding ducts, thereby increasing the heat dissipation area and air flow and reducing temperature rise; at the same time, the extreme width of the winding duct is adjusted to 64mm, improving steel utilization and magnetic flux, and enhancing mechanical strength.
By improving the heat dissipation performance and mechanical strength of the rotor punch, the eddy current loss and temperature rise of the motor are reduced, the efficiency and steel utilization of the motor are improved, the copper wire material is saved, and the cost is reduced.
Smart Images
Figure CN222620757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of small synchronous generators, in particular to a rotor punching sheet. Background Art
[0002] A stamping sheet is a part produced by a punching machine. A rotor stamping sheet is a silicon steel sheet used as a rotor in a motor. Because of its different manufacturing specifications, it is suitable for generator motors of different powers. A rotor stamping sheet is usually very thin, with a thickness of less than 0.55mm. Multiple rotor stamping sheets are stacked on top of each other, and a wire is wound around the groove of the rotor stamping sheet to form a rotor.
[0003] A rotor punching sheet for which a patent has been applied in the industry currently has a partition between two groups of winding slots set into a U shape, with the angle of the spacer set to 15-35° and the inner width of the spacer set to 11-14mm. This results in a reduced heat dissipation area of the rotor punching sheet in the prior art, poor heat dissipation performance, and increased eddy current losses of the motor. At the same time, the rotor pole width is set to 58mm, the rotor outer diameter is set to Φ122, the steel utilization rate of the rotor sheet is low, the magnetic flux is poor, and the angle between the winding slot pole width and the pole hub is set to 50°-52°, resulting in weakened mechanical strength. As a result, the pole hub is easily deformed due to centrifugal force when the motor is running at high speed under load, resulting in friction damage to the motor. In addition, under the same design cost, the temperature rise of the motor increases and the efficiency of the motor decreases. Utility Model Content
[0004] The purpose of the utility model is to provide a rotor punching, which solves the problems that the rotor punching of the prior art has a reduced heat dissipation area, poor heat dissipation performance, and increased eddy current loss of the motor. At the same time, the rotor pole width is set to 58mm, the rotor outer diameter is set to Φ122, the rotor sheet steel utilization rate is low, the magnetic flux is poor, and the angle between the winding slot pole width and the pole armature is set to 50°-52°, the mechanical strength is weakened, and thus the pole armature is easily deformed due to centrifugal force during high-speed operation of the motor load, resulting in friction damage to the motor, and under the same design cost, the motor temperature rise increases and the motor efficiency decreases.
[0005] To achieve the above-mentioned purpose, the utility model provides a rotor punching, including a rotor punching body, the center of the rotor punching body has a rotating shaft hole, the rotor punching body has two winding grooves, the rotor punching body also has two spacer blocks, the two winding grooves are respectively distributed at the upper and lower ends of the rotor punching body, the two spacer blocks are respectively distributed in the corresponding winding grooves, and the two spacer blocks are U-shaped, and the angle between the pole width of the two winding grooves and the pole hub is β54°.
[0006] There are magnetic steel installation grooves on the left and right sides of the rotor punching body, and the extreme width of the two winding grooves is set to 64 mm.
[0007] Wherein, the upper left end and the upper right end of the spacer block are respectively provided with a first extension block.
[0008] The upper left end and the upper right end of the spacer block are respectively provided with a first extension block, and the rotor outer diameter of the rotor punching body is set to 129 mm.
[0009] The rotor sheet body further has a plurality of second extension blocks, which are respectively located on the outer walls of the corresponding winding grooves, the width b of the two spacers is respectively 8.8 mm, and the outer width of the two spacers is respectively 14.2 mm.
[0010] A rotor punching sheet of the utility model is provided with a U-shaped spacer between two symmetrical winding grooves. Air can flow in the rotor through the two U-shaped ventilated spacers, thereby taking away part of the heat and reducing the temperature rise. At the same time, the two U-shaped ventilated spacers separate the two winding grooves to reduce the eddy current loss of the motor. The extreme width of the two winding grooves is adjusted to 64 mm, which improves the utilization rate of steel, increases the magnetic flux, and improves the efficiency of the motor under the same power. In summary, compared with the prior art, the prior art also saves copper wire materials and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0012] Figure 1 It is an overall structural schematic diagram of the utility model.
[0013] 1- rotor punching body, 2- shaft hole, 3- winding groove, 4- spacer block, 5- magnetic steel installation groove, 6- first extension block, 7- second extension block. DETAILED DESCRIPTION
[0014] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.
[0015] See also Figure 1 , Figure 1 It is an overall structural schematic diagram of the utility model.
[0016] The utility model provides a rotor punching, comprising a rotor punching body 1, wherein the center of the rotor punching body 1 is provided with a shaft hole 2, the rotor punching body 1 is provided with two winding grooves 3, the rotor punching body 1 is further provided with two spacer blocks 4, the two winding grooves 3 are respectively distributed at the upper and lower ends of the rotor punching body 1, the two spacer blocks 4 are respectively distributed in the corresponding winding grooves 3, and the two spacer blocks 4 are U-shaped.
[0017] In this embodiment, a U-shaped spacer 4 is arranged between the two symmetrical winding grooves 3. The two U-shaped ventilated spacers 4 can allow air to flow in the rotor, thereby taking away part of the heat and reducing the temperature rise. At the same time, the two U-shaped ventilated spacers 4 separate the two winding grooves 3 to reduce the eddy current loss of the motor. The pole width of the two winding grooves 3 is adjusted to 64 mm, which improves the utilization rate of steel, increases the magnetic flux, and improves the motor efficiency under the same power. In summary, compared with the prior art, the prior art also saves copper wire materials and reduces costs.
[0018] Furthermore, the left and right sides of the rotor sheet body 1 are respectively provided with magnetic steel mounting grooves 5, the upper left end and the upper right end of the spacer block 4 are respectively provided with first extension blocks 6, and the rotor sheet body 1 is also provided with a plurality of second extension blocks 7, and the plurality of second extension blocks 7 are respectively located on the outer walls of the corresponding winding slots 3.
[0019] In this embodiment, the angle between the pole width of the two winding grooves 3 and the pole pivot is β54°, the pole width of the two winding grooves 3 is set to 64 mm, the rotor outer diameter of the rotor punching body 1 is set to 129 mm, the width b of the two spacers 4 is 8.8 mm respectively, and the outer width of the two spacers 4 is 14.2 mm respectively.
[0020] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A rotor punching, characterized in that: It includes a rotor punching body; The center of the rotor punching body is provided with a shaft hole, the rotor punching body has two winding grooves, the rotor punching body also has two spacer blocks, the two winding grooves are respectively distributed at the upper and lower ends of the rotor punching body, the two spacer blocks are respectively distributed in the corresponding winding grooves, and the two spacer blocks are U-shaped, the angle between the pole width of the two winding grooves and the pole pivot is β54°, the left and right sides of the rotor punching body are also provided with magnetic steel mounting grooves respectively, the pole width of the two winding grooves is set to 64mm, the upper left end and the upper right end of the spacer block are respectively provided with a first extension block, and the rotor outer diameter of the rotor punching body is set to 129mm.
2. The rotor punching according to claim 1, characterized in that: The rotor punching body also has a plurality of second extension blocks, which are respectively located on the outer walls of the corresponding winding grooves. The width b of two of the spacers is 8.8 mm, and the outer width of the two spacers is 14.2 mm.