Single-phase asynchronous motor stator for shield pump and shield pump

Abstract

The utility model relates to a single-phase asynchronous motor stator for a shield pump and the shield pump, the single-phase asynchronous motor stator for the shield pump comprises a stator iron core (1), a stator framework (2) and a winding part (3), the stator iron core (1) comprises a stator tooth part (11) and a stator yoke part (12); the cross section of the stator yoke part (12) is annular; the plurality of stator tooth parts (11) extend inwards from the inner wall of the stator yoke part (12) and are uniformly distributed in the circumferential direction; the adjacent stator tooth parts (11) and the stator yoke part (12) between the adjacent stator tooth parts (11) define a stator slot (13), and a gap is formed between the tail ends of the adjacent stator tooth parts (11) to form a stator slot opening (14); the stator framework (2) is arranged in the stator slot (13); and the winding part (3) is wound on the stator tooth part (11). The winding end length is reduced, the copper wire consumption is reduced, the shield pump cost is reduced, and the energy efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a single-phase asynchronous motor stator for a canned pump and a canned pump. Background Art

[0002] Shielded pumps are characterized by no leakage and high safety, and are widely used in household and other fields. Single-phase asynchronous motors have become the mainstream motors in the field of household shielded pumps due to their advantages of low cost and high reliability.

[0003] At present, the single-phase asynchronous motor used in household canned motor pumps usually has an input power of 40W to 1300W, usually has a multi-speed regulation function, for example, 3-speed speed regulation, and is mostly a 2-pole motor with distributed winding.

[0004] In the existing single-phase asynchronous motor for household shielded pumps, the stator adopts distributed winding, which makes the end of the stator winding longer, thereby increasing the stator resistance, increasing the stator loss, reducing the motor efficiency, and increasing the amount of copper used at the stator end, which increases the motor cost. In addition, compared with the centralized winding, the stator adopts distributed winding, which increases the complexity of the stator manufacturing process and the production defect rate, thereby affecting the motor process cost and motor production quality. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a single-phase asynchronous motor stator and a canned pump for a canned pump, thereby reducing the cost of the canned pump and improving energy efficiency.

[0006] The utility model provides the following technical solutions:

[0007] A single-phase asynchronous motor stator for a canned pump includes a stator core 1, a stator frame 2 and a winding part 3. The stator core 1 includes a stator tooth part 11 and a stator yoke part 12. The cross section of the stator yoke part 12 is annular. A plurality of stator teeth 11 extend inward from the inner wall of the stator yoke part 12 and are evenly distributed in the circumferential direction. Adjacent stator teeth 11 and the stator yoke part 12 therebetween form a stator slot 13. There is a gap at the ends of adjacent stator teeth 11 to form a stator slot opening 14. The stator frame 2 is arranged in the stator slot 13. The winding part 3 is wound on the stator tooth part 11. The stator frame 2 can fit the inner wall of the stator slot 13.

[0008] Optionally, the stator tooth 11 includes a tooth body 111 and two branches 112 , and the cross section of the stator tooth 11 is Y-shaped.

[0009] Optionally, the width of the tooth body 111 is greater than or equal to twice the width of the stator yoke 12 .

[0010] Optionally, the width of the tooth body 111 is greater than or equal to the width of the stator slot 14 .

[0011] Optionally, the stator frame is made of insulating material.

[0012] Optionally, the winding section 3 includes a main winding and multiple secondary windings; the main winding includes a first main winding 311 and a second main winding 312, and the first main winding 311 and the second main winding 312 have the same number of turns; the secondary winding includes a pair of a first secondary winding 321 and a second secondary winding 322, a pair of a third secondary winding 323 and a fourth secondary winding 324, and a pair of a fifth secondary winding 325 and a sixth secondary winding 326, the paired secondary windings have the same number of turns, and each pair of secondary windings has a different number of turns from other pairs of secondary windings.

[0013] Optionally, the number of stator teeth 11 is four, and the first main winding 311 and the second main winding 312 are wound on a first pair of stator teeth 11 that are relatively positioned; the first auxiliary winding 321, the third auxiliary winding 323 and the fifth auxiliary winding 325 are a group, and the second auxiliary winding 322, the fourth auxiliary winding 324 and the sixth auxiliary winding 326 are another group, and the two groups of auxiliary windings are wound on a second pair of stator teeth 11 that are relatively positioned.

[0014] Optionally, the first main winding 311 and the second main winding 312 are connected in series to form a stator main phase; the first auxiliary winding 321, the second auxiliary winding 322, the third auxiliary winding 323, the fourth auxiliary winding 324, the fifth auxiliary winding 325 and the sixth auxiliary winding 326 are connected in series in sequence to form a stator auxiliary phase.

[0015] The embodiment of the utility model further provides a shielded pump, including a single-phase asynchronous stand-alone machine, and the single-phase asynchronous motor includes the single-phase asynchronous motor stator for the shielded pump provided by any embodiment.

[0016] Optionally, a shielded pump, whose speed control circuit also includes a gear switch assembly and a capacitor; the stator main phase is connected between the first end and the second end of the AC power supply; the end of the first auxiliary winding 321 away from the second auxiliary winding 322 is a first node, the connection between the second auxiliary winding 322 and the third auxiliary winding 323 is a second node, the connection between the fourth auxiliary winding 324 and the fifth auxiliary winding 325 is a third node, and the end of the sixth auxiliary winding 326 away from the fifth auxiliary winding 325 is a fourth node, the common end of the gear switch assembly is connected to the first end of the AC power supply, and the four selection ends of the gear switch assembly are connected to the first node, the second node, the third node and the fourth node in sequence, and the first node is connected to the second end of the AC power supply through the capacitor; the gear switch assembly is configured to be able to connect its common end to one of its selection ends.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model adopts the centralized winding method of the core yoke. The stator slots are formed by the stator teeth and stator yoke of the stator core, and the winding part is wound on the stator teeth. Most of the winding part is accommodated in the stator slots, which reduces the length of the winding end and greatly reduces the amount of copper wire, thereby achieving cost reduction and efficiency improvement of the shielded pump. At the same time, the manufacturing process of the centralized winding stator is simple and the defect rate is low, which saves manufacturing costs and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is an end view of the stator core of a single-phase asynchronous motor for a canned motor pump provided in an embodiment of the present invention.

[0020] Figure 2 A cross-sectional view of a stator of a single-phase asynchronous motor for a canned motor pump provided in an embodiment of the utility model.

[0021] Figure 3 A motor winding wiring diagram of a single-phase asynchronous motor in a canned motor pump provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-2 As shown, a single-phase asynchronous motor stator for a canned pump includes a stator core 1, a stator frame 2 and a winding part 3. The stator core 1 includes a stator tooth part 11 and a stator yoke part 12; the cross section of the stator yoke part 12 is annular; a plurality of stator teeth 11 extend inward from the inner wall of the stator yoke part 12 and are evenly distributed in the circumferential direction; adjacent stator teeth 11 and the stator yoke part 12 therebetween form a stator slot 13, and there is a gap at the ends of adjacent stator teeth 11 to form a stator notch 14; the stator frame 2 is arranged in the stator slot 13; and the winding part 3 is wound on the stator tooth part 11. Among them, the stator slot plays the role of accommodating the winding part.

[0025] Optionally, the stator tooth 11 includes a tooth body 111 and two branches 112 , and the cross section of the stator tooth 11 is Y-shaped.

[0026] Optionally, the width of the tooth body 111 is greater than or equal to twice the width of the stator yoke 12 .

[0027] Optionally, the width of the tooth body 111 is greater than or equal to the width of the stator slot 14 .

[0028] The width of the tooth body 111 of the stator tooth 11 is d1, and the width of the stator yoke 12 is d2, 2*d2≤d1, specifically 6mm≤2*d2≤d1≤15mm. The stator core may be provided with 4 stator slots and a stator slot opening, and the width of the stator slot opening 14 is set to d3, d3≤d1, specifically 2mm≤d3≤6mm.

[0029] Optionally, the stator frame is made of insulating material.

[0030] Optionally, the stator of the single-phase asynchronous motor for the canned motor pump also includes a stator shielding sleeve 4 which is sleeved with the stator core 1 and is arranged inside the stator core 1 .

[0031] Optionally, the winding part 3 includes a main winding and a plurality of secondary windings; the main winding includes a first main winding 311 and a second main winding 312, and the first main winding 311 and the second main winding 312 have the same number of turns; the secondary winding includes a first secondary winding 321 and a second secondary winding 322 in pairs, a third secondary winding 323 and a fourth secondary winding 324 in pairs, and a fifth secondary winding 325 and a sixth secondary winding 326 in pairs, and the number of turns of the paired secondary windings is the same, and the number of turns of each pair of secondary windings is different from that of other pairs of secondary windings. The first main winding 311 and the second main winding 312 have the same winding parameters, that is, the wire diameter used and the number of turns wound are the same. The first secondary winding 321 and the second secondary winding 322 have the same winding parameters (wire diameter and number of turns), the third secondary winding 323 and the fourth secondary winding 324 have the same winding parameters (wire diameter and number of turns), and the fifth secondary winding 325 and the sixth secondary winding 326 have the same winding parameters (wire diameter and number of turns). The first secondary winding 321, the second secondary winding 322, the third secondary winding 323, the fourth secondary winding 324, the fifth secondary winding 325, and the sixth secondary winding 326 use the same wire diameter, but the number of turns of the first secondary winding 321, the third secondary winding 323, and the fifth secondary winding 325 are not equal.

[0032] Optionally, the number of stator teeth 11 is four, and the first main winding 311 and the second main winding 312 are wound on a first pair of stator teeth 11 that are relatively positioned; the first auxiliary winding 321, the third auxiliary winding 323 and the fifth auxiliary winding 325 are a group, and the second auxiliary winding 322, the fourth auxiliary winding 324 and the sixth auxiliary winding 326 are another group, and the two groups of auxiliary windings are wound on a second pair of stator teeth 11 that are relatively positioned.

[0033] Optionally, the first main winding 311 and the second main winding 312 are connected in series to form the stator main phase; the first auxiliary winding 321, the second auxiliary winding 322, the third auxiliary winding 323, the fourth auxiliary winding 324, the fifth auxiliary winding 325 and the sixth auxiliary winding 326 are connected in series in sequence to form the stator auxiliary phase. Among them, the auxiliary phase circuit is divided into 4 sections to realize the 4-speed speed regulation of the single-phase asynchronous motor, and the paired auxiliary windings in the auxiliary phase are designed with unequal turns. According to the actual output characteristics of the shielded pump performance, the actual requirements of the 4-speed performance interval design correspond to the specific number of turns of each pair of auxiliary windings, so as to achieve uniform intervals of the output performance curves of the shielded pump between each gear.

[0034] The embodiment of the utility model further provides a shielded pump, including a single-phase asynchronous stand-alone machine, and the single-phase asynchronous motor includes the single-phase asynchronous motor stator for the shielded pump provided by any embodiment.

[0035] Optionally, the canned pump, its speed regulation circuit also includes a gear switch assembly and a capacitor; the stator main phase is connected between the first end and the second end of the AC power supply; the end of the first secondary winding 321 away from the second secondary winding 322 is the first node, the connection between the second secondary winding 322 and the third secondary winding 323 is the second node, the connection between the fourth secondary winding 324 and the fifth secondary winding 325 is the third node, the end of the sixth secondary winding 326 away from the fifth secondary winding 325 is the fourth node, the common end of the gear switch assembly is connected to the first end of the AC power supply, the four selection ends of the gear switch assembly are connected to the first node, the second node, the third node and the fourth node in sequence, and the first node is connected to the second end of the AC power supply through a capacitor; the gear switch assembly is configured to be able to connect its common end to one of its selection ends. As a use scenario for a household canned pump, the AC power supply can be a mains power supply, the first end of the AC power supply is a live wire, and the second end is a neutral wire.

[0036] Among them, Figure 3 The stator of the centralized single-phase asynchronous motor has 4 speed adjustment. In the speed adjustment wiring diagram, the first main winding 311 and the second main winding 312 are always connected in series to the mains. The gears are set to 1st gear, 2nd gear, 3rd gear and 4th gear. The larger the gear is in order, the higher the hydraulic output performance of the shielded pump is. In the 4th gear state, all the auxiliary windings are connected in series, then connected to the capacitor and then to the mains. In the 3rd gear state, the fifth auxiliary winding 325 and the sixth auxiliary winding 326 are disconnected and not connected to the circuit, the first auxiliary winding 321, the second auxiliary winding 322, the third auxiliary winding 323 and the fourth auxiliary winding 324 are connected in series, then connected to the capacitor and then to the mains. In the 2nd gear state, the third auxiliary winding 323, the fourth auxiliary winding 324, the fifth auxiliary winding 325 and the sixth auxiliary winding 326 are disconnected and not connected to the circuit, the first auxiliary winding 321 and the second auxiliary winding 322 are connected in series, then connected to the capacitor and then to the mains. In the 1st gear state, all secondary windings are disconnected and not connected to the circuit, and the capacitor is connected to the mains alone.

[0037] In this specification, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0038] Although the utility model has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A single-phase asynchronous motor stator for a canned motor pump, comprising a stator core (1), a stator frame (2) and a winding part (3), characterized in that: The stator core (1) comprises a stator tooth portion (11) and a stator yoke portion (12); the cross section of the stator yoke portion (12) is annular; a plurality of stator teeth portions (11) extend inwardly from the inner wall of the stator yoke portion (12) and are evenly distributed in the circumferential direction; adjacent stator teeth portions (11) and the stator yoke portion (12) therebetween form a stator slot (13), and gaps exist at the ends of adjacent stator teeth portions (11) to form a stator slot opening (14); the stator frame (2) is arranged in the stator slot (13); and the winding portion (3) is wound on the stator teeth portions (11).

2. The single-phase asynchronous motor stator for a canned motor pump according to claim 1, characterized in that: The stator tooth portion (11) comprises a tooth portion body (111) and two branches (112); the cross section of the stator tooth portion (11) is Y-shaped.

3. The single-phase asynchronous motor stator for a canned motor pump according to claim 2, characterized in that: The width of the tooth body (111) is greater than or equal to twice the width of the stator yoke (12).

4. The single-phase asynchronous motor stator for a canned motor pump according to claim 2 or 3, characterized in that: The width of the tooth body (111) is greater than or equal to the width of the stator slot (14).

5. The single-phase asynchronous motor stator for a canned motor pump according to claim 1, characterized in that: The stator frame is made of insulating material.

6. The single-phase asynchronous motor stator for a canned motor pump according to claim 1, characterized in that: The winding section (3) comprises a main winding and a plurality of secondary windings; the main winding comprises a first main winding (311) and a second main winding (312), the first main winding (311) and the second main winding (312) having the same number of turns; the secondary winding comprises a pair of a first secondary winding (321) and a second secondary winding (322), a pair of a third secondary winding (323) and a fourth secondary winding (324), and a pair of a fifth secondary winding (325) and a sixth secondary winding (326), the pairs of the secondary windings having the same number of turns, and each pair of the secondary windings having a different number of turns from the other pairs of the secondary windings.

7. The single-phase asynchronous motor stator for a canned motor pump according to claim 6, characterized in that: The number of the stator teeth (11) is four, and the first main winding (311) and the second main winding (312) are wound on a first pair of the stator teeth (11) that are relatively positioned; the first auxiliary winding (321), the third auxiliary winding (323) and the fifth auxiliary winding (325) form a group, and the second auxiliary winding (322), the fourth auxiliary winding (324) and the sixth auxiliary winding (326) form another group, and the two groups of auxiliary windings are wound on a second pair of the stator teeth (11) that are relatively positioned.

8. The single-phase asynchronous motor stator for a canned motor pump according to claim 7, characterized in that: The first main winding (311) and the second main winding (312) are connected in series to form a stator main phase; the first auxiliary winding (321), the second auxiliary winding (322), the third auxiliary winding (323), the fourth auxiliary winding (324), the fifth auxiliary winding (325) and the sixth auxiliary winding (326) are connected in series in sequence to form a stator auxiliary phase.

9. A canned motor pump, comprising a single-phase asynchronous stand-alone machine, characterized in that: The single-phase asynchronous motor comprises the single-phase asynchronous motor stator for a canned motor pump according to any one of claims 1 to 8.

10. The canned motor pump according to claim 9, characterized in that: When the stator of the single-phase asynchronous motor for a shielded pump is the stator of the single-phase asynchronous motor for a shielded pump as claimed in any one of claims 6 to 8, it also includes a gear switch assembly and a capacitor; the main phase of the stator is connected between the first end and the second end of the AC power supply; the end of the first auxiliary winding (321) away from the second auxiliary winding (322) is a first node, the connection between the second auxiliary winding (322) and the third auxiliary winding (323) is a second node, the connection between the fourth auxiliary winding (324) and the fifth auxiliary winding (325) is a third node, and the end of the sixth auxiliary winding (326) away from the fifth auxiliary winding (325) is a fourth node; the common end of the gear switch assembly is connected to the first end of the AC power supply, and the four selection ends of the gear switch assembly are connected to the first node, the second node, the third node and the fourth node in sequence, and the first node is connected to the second end of the AC power supply through the capacitor; the gear switch assembly is configured to be able to connect its common end to one of its selection ends.

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