Novel ammonia motor stator
By employing V-shaped lamination slots and slot wedge structures in the stator of the ammonia motor, the problem of low efficiency in aluminum wire motors was solved, achieving efficient copper wire fixing and isolation, and improving motor performance and power density.
Patent Information
- Application Number
- CN202520051533.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Traditional ammonia refrigeration compressors use aluminum wire motors, which have low efficiency and low power density, making it difficult to meet customer requirements. The low efficiency of aluminum wire motors necessitates increasing the motor size to meet performance requirements.
It adopts a V-shaped lamination groove and slot wedge structure, embedding copper wire and copper wire in contact with ammonia. The copper wire is isolated from the ammonia refrigerant by the V-shaped lamination groove and slot wedge structure, and the coil is fixed by the slot wedge. The use of copper wire improves the motor performance.
It improves the efficiency and power density of the motor, simplifies the assembly process, enhances the fixation and protection of the coil, and avoids contact between the copper wire and ammonia.
Smart Images
Figure CN223713672U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor field, especially a novel ammonia motor stator. BACKGROUND
[0002] In recent years, under the environment of energy saving and emission reduction, because traditional freon material enters the atmosphere and combines with the stratospheric ozone, the ozone is converted into oxygen, and the ozone layer becomes thin or even appears a hole. After the ozone layer is destroyed, a large amount of solar ultraviolet rays will reach the earth's surface. On the one hand, it aggravates climate warming; more importantly, it will have great harm to the earth's organisms. Ammonia refrigerant is derived from the atmosphere and is an environmentally friendly refrigerant. In recent years, people have been committed to developing ammonia refrigeration motors.
[0003] Because copper wire and ammonia refrigerant are incompatible, the motor used in the traditional ammonia refrigeration compressor adopts aluminum wire, but the efficiency of the aluminum wire motor is low, the power density is low, and usually the size of the motor needs to be increased to meet the requirements of customers. UTILITY MODEL CONTENTS
[0004] In view of the defects existing in the prior art, the main purpose of the utility model is to overcome the shortcomings of the prior art, and a novel ammonia motor stator is disclosed, which comprises a stator body composed of a plurality of stator punching sheets, the stator punching sheet is in a circular structure, a plurality of punching sheet grooves are arranged on the inner circle of the stator punching sheet around the circumference, the punching sheet groove is V-shaped, a groove wedge is arranged at the opening of the punching sheet groove, and the groove wedge is connected with the punching sheet groove; and a coil is embedded in the punching sheet groove.
[0005] Further, the two side inner walls of the punching sheet groove are provided with clamping grooves, and the clamping grooves are close to the opening of the punching sheet groove, and the two sides of the groove wedge are buckled in the clamping grooves.
[0006] Further, the clamping groove is in a V-shaped structure.
[0007] Further, the groove wedge is in a strip-shaped structure, and an inward converging inclined surface is arranged on the upper surface of the groove wedge.
[0008] Further, a guide inclined surface is arranged on the lower surface of the groove wedge, and the guide inclined surface is located at one end of the groove wedge.
[0009] Further, eight buckle piece grooves are arranged on the outer side of the stator punching sheet, each buckle piece groove is connected to form a continuous connection groove after the plurality of stator punching sheets are laminated, and a buckle piece matched with each other is arranged in the connection groove.
[0010] Further, four flat edges are arranged on the outer side of the stator punching sheet at equal intervals.
[0011] Further, a rotation stopping groove is arranged on the side wall of the stator punching sheet.
[0012] Furthermore, the coil is enameled wire with a copper core.
[0013] Furthermore, Nomex cable ties are wound around the outside of the coil.
[0014] The beneficial effects achieved by this utility model are as follows:
[0015] This invention features a large-opening lamination slot, allowing the pre-treated coil to be assembled into the slot. High-efficiency copper wire is selected and pre-treated to ensure the coil core does not contact ammonia, simplifying assembly and improving motor performance. A slot wedge seals the lamination slot, ensuring the coil is fixed within it. The slot wedge pull-out structure facilitates wedge installation. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a novel ammonia motor stator according to the present invention;
[0017] Figure 2 This is a schematic diagram of the stator lamination structure;
[0018] Figure 3 for Figure 2 Enlarged view of A in the middle;
[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the groove wedge;
[0020] Figure 5 for Figure 4 A three-dimensional structural diagram from another perspective;
[0021] The attached figures are labeled as follows:
[0022] 1. Stator lamination, 2. Slot wedge, 3. Clamping piece, 11. Lamination slot, 12. Snap slot, 13. Snap slot, 14. Flat edge, 15. Anti-rotation slot, 21. Snap edge, 22. Bevel, 23. Guide bevel. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0024] A new type of ammonia motor stator, such as Figures 1-5As shown, the stator body is composed of a plurality of stator laminations 1 stacked together. The stator lamination 1 has a circular structure. A plurality of lamination slots 11 are arranged around the inner periphery of the stator lamination 1. The lamination slots 11 are V-shaped and have a large opening to facilitate the insertion of the coil. A slot wedge 2 is arranged at the opening of the lamination slot 11. The slot wedge 2 is fixedly connected to the lamination slot 11. The coil is wound in the lamination slot 11. Through the above structure, the coil can be directly inserted into the lamination slot after pretreatment. The winding structure of the coil in the lamination slot 11 is a conventional structure and will not be described in detail here.
[0025] In an embodiment, as shown in Figures 1-5 The inner walls on both sides of the lamination slot 11 are provided with clamping grooves 12, and the clamping grooves 12 are close to the opening of the lamination slot 11. The two sides of the slot wedge 2 are buckled in the clamping grooves 12.
[0026] In the above embodiment, as shown in Figures 1-5 The clamping groove 12 is V-shaped. Correspondingly, the two sides of the slot wedge 2 are provided with clamping edges 21 matched with the clamping groove 12. The clamping edges 21 are angular and matched with the V-shaped structure.
[0027] In an embodiment, as shown in Figures 1-5 The slot wedge 2 has a strip-shaped structure, and the upper surface of the slot wedge 2 is provided with an inwardly converging inclined surface 22. The inclined surfaces 22 on both sides are used to guide the deformation of the slot wedge 2 to one side.
[0028] In an embodiment, as shown in Figures 1-5 The lower surface of the slot wedge 2 is provided with a guide inclined surface 23, and the guide inclined surface 23 is located at one end of the slot wedge 2. The slot wedge 2 is used to press the coil inserted into the lamination slot 11 tightly in the lamination slot 11, and the slot wedge 2 is assembled by pulling and inserting. Therefore, in order to facilitate the insertion of the slot wedge 2, the end is provided with a guide inclined surface 23 to guide the coil to press tightly in the lamination slot 11 in the axial direction, which is convenient for the insertion of the slot wedge 2.
[0029] In the above embodiment, as shown in Figures 1-5 The slot wedge 2 is tightly matched with the lamination slot 11. Specifically, the overall width of the slot wedge 2 is greater than the distance between the two clamping grooves 12. Therefore, when the clamping edge 21 of the slot wedge 2 is inserted into the clamping groove 12, the slot wedge 2 is deformed into the lamination slot 11 through the cooperation of the inclined surface 22, and the coil is pressed tightly in the lamination slot 11. At the same time, the clamping edge 21 is tightly connected in the clamping groove 12.
[0030] In an embodiment, as shown in Figures 1-5 The outer side of the stator lamination 1 is provided with eight buckle slot 13. After a plurality of stator laminations 1 are stacked, each buckle slot is connected to form a continuous connection slot 4. The buckle 3 is arranged in the connection slot 4 and cooperates with each other. Specifically, the buckle 3 is in interference fit with the connection slot 4.
[0031] In an embodiment, as shown inFigures 1-5 As shown, four flat edges 14 are evenly spaced on the outer side of the stator lamination 1. When the stator laminations 1 are stacked, the flat edges 14 are used to align the stator laminations 1.
[0032] In one embodiment, such as Figures 1-5 As shown, anti-rotation grooves 15 are provided on the side wall of the stator lamination 1. The anti-rotation grooves 15 of each stator lamination 1 are connected to form a keyway. When the stator body is connected to the motor housing, a matching keyway is provided on the motor housing. When the stator body is connected to the motor housing, a key is inserted, and the key connects the keyway on the stator body and the motor housing to prevent the rotation of the motor housing and the stator body.
[0033] In one embodiment, the coil is enameled wire with a copper core to improve motor efficiency.
[0034] In one embodiment, Nomex cable ties are wrapped around the coil to protect it and prevent damage to the coil's enamel layer.
[0035] When using this utility model, such as Figures 1-5 As shown, enameled wire is wound into a coil, which is then wrapped with binding tape. The pre-fabricated coil is then inserted into the corresponding lamination slot 11, and the opening of the lamination slot 11 is sealed by a slot wedge 2. Next, epoxy is potted between the stator body and the coil using an insulating layer casting fixture to improve the coil's strength. This also further protects the coil, preventing the inner core from contacting ammonia.
[0036] In the above embodiments, such as Figures 1-5 As shown, the groove wedge 2 is made of epoxy material.
[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.
Claims
1. A novel ammonia motor stator, characterized in that, The stator body is composed of several stator laminations stacked together. The stator laminations are circular in shape. Several lamination slots are arranged around the circumference of the inner ring of each stator lamination. The lamination slots are V-shaped. A slot wedge is installed at the opening of each lamination slot and engages with the lamination slot. A coil is embedded in each lamination slot.
2. The novel ammonia motor stator according to claim 1, characterized in that, The inner walls on both sides of the stamping groove are provided with slots, and the slots are close to the opening of the stamping groove, with the two sides of the slot wedge fastened into the slots.
3. A novel ammonia motor stator according to claim 2, characterized in that, The slot has a V-shaped structure.
4. A novel ammonia motor stator according to claim 1, characterized in that, The groove wedge has a strip-shaped structure, and the upper surface of the groove wedge is provided with an inwardly converging inclined surface.
5. A novel ammonia motor stator according to claim 1, characterized in that, The lower surface of the groove wedge is provided with a guide slope, and the guide slope is located at one end of the groove wedge.
6. A novel ammonia motor stator according to claim 1, characterized in that, The stator lamination has eight fastening slots on its outer side. After several stator laminations are stacked, each of the fastening slots is connected to form a continuous connecting groove. The connecting groove is provided with mutually cooperating fastening pieces.
7. A novel ammonia motor stator according to claim 1, characterized in that, The stator lamination has four flat edges evenly spaced on its outer side.
8. A novel ammonia motor stator according to claim 1, characterized in that, Anti-rotation grooves are provided on the side walls of the stator laminations.
9. A novel ammonia motor stator according to claim 1, characterized in that, The coil is made of enameled wire with a copper core.
10. A novel ammonia motor stator according to claim 1, characterized in that, The coil is wrapped with Nomex binding tape.