Stator pressing ring structure for high-efficiency low-voltage motor

Abstract

The utility model relates to a stator pressing ring structure for a high-efficiency low-voltage motor, which comprises a plurality of stacked stator punching sheets, stator pressing rings are symmetrically arranged at the two ends of the stator punching sheets, a pull rod simultaneously penetrates through the stator punching sheets and the stator pressing rings at the two ends, threads are arranged at the two ends of the pull rod, and the two ends of the pull rod are locked by nuts; each stator pressing ring structurally comprises a pressing ring body, the pressing ring body is of an annular structure, special-shaped teeth which are evenly distributed at intervals are arranged on the inner ring of the pressing ring body, a protrusion is arranged on one side of the bottom of each special-shaped tooth, and a special-shaped groove is formed between every two adjacent special-shaped teeth. According to the utility model, the structure is compact and reasonable, the operation is convenient, through the unique design of the stator pressing ring, the fixed installation work of the stator punching sheet can be conveniently completed, the stator punching sheet can be well and firmly pressed, the bounce-off amount of the tooth part of the stator punching sheet is reduced, the installation strength is improved, the installation precision is ensured, and the service life of a motor is prolonged while the use requirement is satisfied.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor auxiliary component technical field especially a stator pressure ring structure for high efficiency low voltage motor. BACKGROUND

[0002] With the development of motor technology, high efficiency motor is applied more and more widely, and the corresponding low voltage super high efficiency motor standard GB18613 is also introduced recently; the current 1st energy efficiency grade is the highest efficiency standard that motor executes. In order to meet the standard and cost demand of high efficiency, the existing frame, end cover and local change stator and rotor lamination and corresponding component structure design are utilized to meet the standard demand of high efficiency.

[0003] The stator pressure ring is an important supporting part of the stator core, and its design is particularly important. In the prior art, the conventional low voltage motor stator pressure ring is usually a circular ring. The contact area of the pressure ring with the core lamination of this structure is small. If the pressure ring does not contact the tooth part of the lamination, the tooth part of the lamination will be popped up and loose. If the lamination pressure is increased, the tooth part of the lamination will be popped up more, usually more than 3mm, or even the core will be severely distorted and cannot be used. SUMMARY

[0004] In view of the above-mentioned shortcomings in the prior art, the present application provides a stator pressure ring structure for high efficiency low voltage motor, which effectively solves the defects of the circular ring pressure ring of the low voltage motor, and uniquely designs the stator pressure ring to ensure installation accuracy and meet the use requirements.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A stator pressure ring structure for high efficiency low voltage motor, comprising a plurality of stator laminations stacked, the two ends of the stator laminations are symmetrically arranged with stator pressure rings, a pull rod passes through the plurality of stator laminations and the stator pressure rings at both ends at the same time, the two ends of the pull rod are provided with threads, and the two ends of the pull rod are locked with nuts.

[0007] The structure of a single stator pressure ring comprises a pressure ring body, the pressure ring body is in a circular ring structure, the inner ring of the pressure ring body is arranged with uniformly spaced profiled teeth, the bottom side of each profiled tooth is provided with a protrusion, and a profiled groove is formed between the adjacent two profiled teeth.

[0008] As a further improvement of the above technical scheme:

[0009] The pull rod is made of Q235 round steel.

[0010] The pull rod is a double-headed screw rod.

[0011] The stator laminations are made of low-loss cold-rolled silicon steel sheets.

[0012] The structure of the stator pressing ring is the same as that of the stator punching sheet.

[0013] The stator pressing ring adopts an integrated structure.

[0014] A slope is arranged on the protrusion.

[0015] A plurality of circular holes for mounting the pull rod are uniformly distributed in the circumferential direction of the pressing ring body.

[0016] The diameter of the circular hole is greater than the outer diameter of the pull rod.

[0017] A plurality of screw holes are distributed in the circumferential direction of the pressing ring body.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model discloses compact structure, reasonable, convenient operation, through the unique design of stator pressing ring, can conveniently complete the fixed installation work of stator punching sheet, and can be very good and firmly press stator punching sheet, make stator punching sheet tooth department and open the amount of small, improve the installation intensity, guarantee installation accuracy, satisfy the use requirement of the extension life of motor at the same time. DRAWINGS

[0020] Figure 1 It is the assembly drawing of the utility model installation in the stator core.

[0021] Figure 2 It is the structure schematic view of the utility model.

[0022] Figure 3 It is the front view of the utility model.

[0023] Among them: 1, pull rod;2, nut;3, stator punching sheet;4, stator pressing ring;

[0024] 401, pressing ring body;402, circular hole;403, screw hole;404, special-shaped tooth;405, special-shaped slot;406, protrusion. CONCRETE IMPLEMENTING METHOD

[0025] The specific implementing method of the utility model is explained below in combination with the drawings.

[0026] As Figure 1 , Figure 2 and Figure 3 Indicated, the stator pressing ring structure for high-efficiency low-voltage motor of the embodiment, including the stator punching sheet 3 of multiple stacking, the both ends of stator punching sheet 3 are symmetrically arranged with stator pressing ring 4, and the stator punching sheet 3 and the stator pressing ring 4 at both ends are simultaneously passed through with pull rod 1, the both ends of pull rod 1 are provided with screw thread, and are locked with nut 2 at the both ends of pull rod 1;

[0027] The single stator pressing ring 4 comprises a pressing ring body 401 in a circular ring structure, and the inner ring of the pressing ring body 401 is provided with uniformly spaced profiled teeth 404, and each profiled tooth 404 is provided with a protrusion 406 on one side of the bottom, and a profiled groove 405 is formed between the adjacent two profiled teeth 404.

[0028] The pull rod 1 is made of Q235 round steel.

[0029] The pull rod 1 is a double-headed screw rod.

[0030] The stator punching sheet 3 is made of low-loss cold-rolled silicon steel sheet.

[0031] The structure of the stator punching sheet 3 is the same as that of the stator pressing ring 4.

[0032] The stator pressing ring 4 adopts an integral structure.

[0033] The protrusion 406 is provided with an inclined surface.

[0034] The circumference of the pressing ring body 401 is uniformly distributed with a plurality of circular holes 402 for mounting the pull rod 1.

[0035] The hole diameter of the circular hole 402 is greater than the outer diameter of the pull rod 1.

[0036] The circumference of the pressing ring body 401 is distributed with a plurality of screw holes 403.

[0037] As shown in the stator core assembly structure diagram, Figure 1 it mainly comprises four parts:

[0038] the pull rod 1, the nut 2, the stator punching sheet 3 and the stator pressing ring 4.

[0039] Among them, the pull rod 1 is made of Q235 round steel, and the two ends of the pull rod 1 are provided with threads;

[0040] Among them, the nut 2 is a standard nut in line with the national standard.

[0041] Among them, the stator punching sheet 3 is made of low-loss cold-rolled silicon steel sheet 50W310.

[0042] The shape of the stator punching sheet 3 is the same as that of the stator pressing ring 4.

[0043] Among them, the material of the stator pressing ring 4 is Q235 steel plate.

[0044] The stator pressing ring 4 mainly comprises a circular hole 402, a screw hole 403, a profiled tooth 404, a profiled groove 405 and a protrusion 406.

[0045] The slot on the stator lamination 3 is slightly smaller than the special slot 405 on the stator pressing ring 4 in size, which can ensure better embedding of the stator coil into the iron core and also ensure greater contact area between the stator pressing ring 4 and the stator lamination 3, so as to better press the stator lamination 3.

[0046] The stator pressing ring 4 and the stator lamination 3 are both provided with six uniformly distributed circular holes 402 for the double-headed screw rod (i.e. the pull rod 1) to pass through, and the stator pressing ring 4 is fastened by the nut 2 to fasten the stator lamination 3, so that the stator iron core has higher lamination pressure, and experiments prove that the lamination pressure coefficient of the stator iron core is increased from 0.97 to above 0.985, the stator iron core of the same length can use more stator laminations 3, so as to improve the efficiency and also improve the strength of the stator iron core and reduce the vibration of the motor.

[0047] The stator pressing ring 4 is provided with four uniformly distributed screw holes 403, which facilitates hoisting and overturning of the stator iron core.

[0048] The stator pressing ring 4 is provided with a plurality of uniformly distributed special teeth 404, and each special tooth 404 is provided with a protrusion 406. The motor is designed to reduce the hysteresis loss of the lamination, and the stator lamination 3 is designed to have the same structure as the stator pressing ring 4, the special teeth 404 with the protrusions 406 of the stator pressing ring 4 can have greater contact area with the stator lamination 3, and can firmly press the stator lamination 3, so that the tooth opening of the stator lamination 3 is smaller.

[0049] The special slot 405 is provided with an R angle, which can effectively reduce the stress concentration of the stator pressing ring 4, and the R angle is slightly larger than the radius of the lamination slot bottom by 0.6-1.2 mm, which facilitates the coil to be lowered and also improves the strength of the stator pressing ring 4.

[0050] The structure of the stator pressing ring 4 can realize greater increase of the lamination pressure coefficient of the motor iron core, increase the lamination pressure, and under the premise of a certain length of the iron core, more laminations can be used for the stator lamination, so as to improve the efficiency.

[0051] The structure of the stator pressing ring 4 can realize increase of the contact area with the motor iron core, ensure contact with the lamination tooth portion, the tooth opening of the lamination is very small, usually within 1 mm. The strength of the stator iron core is enhanced, the motor stray loss is reduced, and the damage to the insulation layer of the lamination caused by friction generated by high-frequency vibration between laminations during operation of the motor is reduced.

[0052] The motor iron core manufactured by using the stator pressing ring 4 has smaller loss and higher efficiency.

[0053] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. A stator pressing ring structure for high efficiency low voltage motor, characterized in that: The application relates to a stator structure, which comprises a plurality of stacked stator laminations (3), symmetrical stator pressing rings (4) arranged at the two ends of the stator laminations (3), and a pull rod (1) penetrating through the plurality of stator laminations (3) and the stator pressing rings (4) at the two ends at the same time, wherein the two ends of the pull rod (1) are provided with threads and locked by nuts (2). The structure of the single stator pressing ring (4) comprises a pressing ring body (401) in a circular ring structure, the inner ring of the pressing ring body (401) is provided with uniformly distributed special-shaped teeth (404), the bottom side of each special-shaped tooth (404) is provided with a protrusion (406), and special-shaped grooves (405) are formed between the two adjacent special-shaped teeth (404).

2. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, characterized in that: The pull rod (1) is made of Q235 round steel.

3. The stator pressing ring structure of high efficiency low voltage electric machine according to claim 1, characterized in that: The pull rod (1) is a double-end screw rod.

4. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, characterized in that: The stator laminations (3) are made of low-loss cold-rolled silicon steel sheets.

5. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, characterized in that: The structure of the stator laminations (3) is the same as that of the stator pressing rings (4).

6. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, characterized in that: The stator pressing rings (4) adopt an integrated structure.

7. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, characterized in that: An inclined surface is arranged on the protrusion (406).

8. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, wherein: A plurality of circular holes (402) for mounting the pull rod (1) are uniformly distributed in the circumferential direction of the pressing ring body (401).

9. The stator pressing ring structure of high efficiency low voltage electric machine according to claim 8, characterized in that: The diameter of the circular hole (402) is larger than the outer diameter of the pull rod (1).

10. The stator pressing ring structure for high efficiency low voltage electric machines as claimed in claim 1, wherein: A plurality of screw holes (403) are distributed in the circumferential direction of the pressing ring body (401).

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