Detection tool for AC generator rotor claw pole

Abstract

The utility model discloses a detection tool for a claw pole of an AC generator rotor. The detection tool comprises a core rod used for detecting the coaxiality of the claw pole; the claw pole indexing detection component comprises a main body part and claw petals, the circumferential surface of the main body part is a conical surface matched with the inner surfaces of the claw pole petals, the number of the claw petals is multiple, and after the claw petals are arranged at intervals in the circumferential direction of the main body part, insertion grooves matched with the claw pole petals are formed between every two adjacent claw petals and the conical surface of the main body part; the main body part is provided with a containing groove used for containing a winding supporting column, the bottom of the main body part is provided with an inserting hole used for being matched with a core rod, and the inserting hole is communicated with the containing groove. According to the utility model, the indexing and coaxiality of the claw pole can be rapidly detected.

Description

Technical Field

[0001] The utility model relates to the technical field of AC generators, in particular to a detection tool for claw poles of AC generator rotors. Background Art

[0002] There are many forms of generators, but the working principle is based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: use appropriate magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction with each other to generate electromagnetic power and achieve the purpose of energy conversion.

[0003] like Figures 1 to 3 The main function of the claw pole 1 is to convert the axial magnetic field generated by the excitation coil in the rotor into a radial magnetic field, so that when the rotor 1 rotates, an alternating magnetic field distributed in three dimensions in space is obtained. This alternating magnetic field generates alternating current relative to the movement of the stator. Several important structural dimensions that affect the efficiency of the claw pole 1 generator are: air gap length, stator core length, tip pole arc coefficient, root pole arc coefficient, and pole length. The claw pole 1 division will affect the tip pole arc coefficient and the root pole arc coefficient. Generally speaking, the more uniform the claw pole petal 1b is distributed, the closer the air gap magnetic field is to a sinusoidal distribution.

[0004] The claw-pole rotor is composed of a claw pole 1, a winding 2, and a rotor shaft assembly (not shown in the figure). There are two claw poles 1, each claw pole 1 is composed of a claw pole seat 1a, a claw pole petal 1b and a winding support 1c. There are multiple claw pole petals 1b and they are arranged at intervals along the circumference of the claw pole seat 1a. A slot 1d is formed between two adjacent claw pole petals 1b. An axial hole 1e is provided on the claw pole seat 1a. The axial hole 1e passes through the winding support 1c and the claw pole seat 1a. One end of the support 1c is fixed to the claw pole seat 1a. During assembly, the winding 2 is arranged on one of the winding supports 1c, and the claw pole petals 1b of the two claw poles 1 are inserted into the slot 1d of the other claw pole 1.

[0005] The claw pole 1 is usually manufactured by forging, which is efficient, but it is impossible to control the accuracy of certain parts of the claw pole 1 within the designed tolerance range. These accuracies include the distribution accuracy and surface accuracy of the claw pole petal 1b. Therefore, when the claw pole 1 is assembled with the winding 2, whether there is a protrusion on the claw pole seat 1a or the claw pole petal 1b, it is easy to cause the winding 2 to be damaged, the waveform between the turns of the winding 2 to be poor, and other consequences.

[0006] Currently, there is no effective measurement method to control the indexing of the claw pole 1 formed by forging. The claw pole 1 has a complex shape, and many dimensions of the claw pole 1 cannot be accurately measured. The existing measurement method only measures the coaxiality. Since the claw pole 1 affects the dynamic balance and performance of the rotor, and there are many molds and the indexing is not uniform, the limitations of the measurement method lead to the indexing and coaxiality of the claw pole 1 cannot be guaranteed. Summary of the invention

[0007] In view of the above problems, the utility model provides a detection tool for claw poles of an AC generator rotor. The utility model can quickly detect the division and coaxiality of the claw poles.

[0008] The detection tooling for the claw pole of the AC generator rotor includes:

[0009] Mandrel for claw pole coaxiality testing;

[0010] The claw pole indexing detection component includes a main body and claw petals. The circumferential surface of the main body is a conical surface that matches the inner surface of the claw pole petals. There are multiple claw petals. After these claw petals are arranged at intervals along the circumference of the main body, a mating groove for matching with the claw pole petals is formed between two adjacent claw petals and the conical surface of the main body. The main body is provided with a receiving groove for accommodating a winding support, and the bottom of the main body is provided with a socket for matching with a core rod, and the socket is connected to the receiving groove.

[0011] Furthermore, the claw flap includes a first guide portion and a second guide portion, one end of the first guide portion is located outside the axial end surface of the main body portion, the other end of the first guide portion is fixed to the second guide portion, and the second guide portion is matched and fixed to the conical surface.

[0012] Furthermore, the first guide portion is fan-shaped.

[0013] Furthermore, a first arc surface is formed between the inner wall surface of the accommodating groove and the axial end surface of the main body by chamfering.

[0014] Furthermore, a second arc surface is formed between the conical surface and the axial end surface of the main body by chamfering, and a second arc surface is provided between two adjacent claw petals.

[0015] The process of using the utility model to detect claw poles is as follows:

[0016] Insert the mandrel into the socket and pass the mandrel through the axial hole in the claw pole.

[0017] The claw pole is pushed toward the claw pole indexing detection component so that the claw pole petal on the claw pole is inserted into the mating groove, the inner surface of the claw pole petal matches the conical surface, and the claw petal in the claw pole indexing detection component enters the slot, and the winding support is inserted into the accommodating groove.

[0018] If the center of the axial hole on the claw pole deviates from the center of the claw pole seat, some claw pole petals will not be able to enter the mating slot (the center of the axial hole deviates too much from the center of the claw pole seat), and the coaxiality of the claw pole is unqualified, or although all claw pole petals can enter the mating slot, they cannot be inserted to the bottom, that is, they will get stuck during the insertion process, and the coaxiality of the claw pole is unqualified. If the centers of the jack, core rod, and axial hole are on the same straight line, all claw pole petals can smoothly enter the mating slot and will not get stuck during the insertion process, so the coaxiality of the claw pole is qualified.

[0019] If a protrusion appears on the inner surface of the claw pole petal during the forging stage of the claw pole, the claw pole cannot be laid flat after the claw pole petal is inserted into the mating slot. If the protrusion is too large, the claw pole will be tilted, and the claw pole can be directly judged as unqualified by observation. If the protrusion on the inner surface of the claw pole petal is small, press the claw pole on the claw pole indexing detection component, and gently shake the claw pole indexing detection component. If the claw pole shakes, it can be judged that there is a protrusion on the inner surface of the claw pole petal, and the claw pole indexing is unqualified.

[0020] It can be seen from the above that the utility model realizes accurate detection of the claw poles through the core rod and the claw pole indexing detection component, and the operation process is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of claw pole.

[0022] Figure 2 is a cross-sectional view of a claw pole.

[0023] Figure 3 This is the assembly diagram of two claw poles and windings.

[0024] Figure 4 This is a diagram showing the coordination between the main body and the core rod.

[0025] Figure 5 It is a three-dimensional diagram of the main body.

[0026] Figure 6 Schematic diagram of the claw flap.

[0027] Markings in the attached drawings:

[0028] Claw pole 1, claw pole seat 1a, claw pole petal 1b, winding support 1c, slot 1d, shaft hole 1e, winding 2.

[0029] The core rod 11 , the main body 12 , the claw 13 , the first guide portion 13 a , the second guide portion 13 b , the conical surface 14 , the insertion groove 15 , the receiving groove 16 , the insertion hole 17 , the first arc surface 18 , and the second arc surface 19 . DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figures 1 to 6 As shown, the detection tooling for the claw pole of the AC generator rotor includes a core rod 11 and a claw pole indexing detection component. The following describes in detail the various components and the relationship between them:

[0032] The core rod 11 is used for detecting the coaxiality of the claw pole 1. The core rod 11 is cylindrical, and the outer diameter of the core rod 11 is the same as the diameter of the axial hole 1e. When in use, one end of the core rod 11 is matched with the axial hole 1e on the claw pole 1, and the other end of the core rod 11 is matched with the claw pole division detection component.

[0033] The claw pole indexing detection component includes a main body 12 and a claw petal 13. The circumferential surface of the main body 12 is a conical surface 14 that matches the inner surface of the claw pole petal 1b. There are multiple claw petals 13. In this embodiment, the number of claw petals 13 is 6. After these claw petals 13 are arranged at intervals along the circumference of the main body 12, a mating groove 15 for matching with the claw pole petal 1b is formed between two adjacent claw petals 13 and the conical surface 14 of the main body 12. Multiple claw petals 13 are evenly arranged along the conical surface 14 of the main body 12. The claw petals 13 include a first guide portion 13a and a second guide portion 13b. One end of the first guide portion 13a is located outside the axial end surface of the main body 12, and the other end of the first guide portion 13a is fixed to one end of the second guide portion 13b. The second guide portion 13b matches and is fixed to the conical surface 14. The cross section of the first guide portion 13a is fan-shaped, and the thickness of the second guide portion 13b gradually decreases from one end to the other end.

[0034] The main body 12 is provided with a receiving groove 16 for accommodating the winding support 1c, and the bottom of the main body 12 is provided with a socket 17 for cooperating with the core rod 11. The socket 17 is connected with the receiving groove 16, and the diameter of the socket 17 is the same as the diameter of the shaft hole 1e. When in use, the other end of the core rod 11 cooperates with the socket 17.

[0035] The dimensions of the core rod 11 and the insertion hole 17 are designed according to the through gauge dimensions of the axial hole 1e, ensuring that the claw pole 1 can be smoothly passed through to achieve the effect of measuring the coaxiality in accordance with the drawing and can be measured quickly.

[0036] The depth of the receiving groove 16 is greater than the height of the winding support 1 c , so that when the winding support 1 c is inserted into the receiving groove 16 , the winding support 1 c is prevented from colliding with the bottom of the receiving groove 16 .

[0037] In the utility model, the inner surface of the claw pole petal 1b on the claw pole 1 is an inclined surface, and the inclined surface is designed with a negative tolerance. At the beginning of the design, it is considered that the mass of the claw pole 1 will affect the inertia of the product when it rotates. In order to ensure the quality of the claw pole 1 as much as possible, the inclined surface with a negative tolerance is selected, so that the claw pole indexing detection component is compatible with more claw poles 1 detection as much as possible, thereby widening the detection range of the claw pole indexing detection component.

[0038] In this embodiment, a first arc surface 18 is formed by chamfering between the inner wall surface of the receiving groove 16 and the axial end surface of the main body 12. When the winding support 1c is inserted into the receiving groove 16, the first arc surface 18 can prevent the winding support 1c from colliding with the first arc surface 18.

[0039] A second arc surface 19 is formed by chamfering between the conical surface 14 and the axial end surface of the main body 12, and a second arc surface 19 is provided between two adjacent claw petals 13. The radius corresponding to the second arc surface 19 is smaller than the radius corresponding to the first arc surface 18, so as to avoid interference with the claw pole 1 and misleading the detection result.

[0040] The process of using the utility model to detect the claw pole 1 is as follows:

[0041] The core rod 11 is inserted into the insertion hole 17 , and the core rod 11 is passed through the shaft hole 1 e in the claw pole 1 .

[0042] The claw pole 1 is pushed toward the claw pole indexing detection component so that the claw pole petal 1b on the claw pole 1 is inserted into the mating groove 15, the inner surface of the claw pole petal 1b cooperates with the conical surface 14, and the claw petal 13 in the claw pole indexing detection component enters the slot 1d, and the winding support 1c is inserted into the accommodating groove 16.

[0043] If the center of the axial hole 1e on the claw pole 1 deviates from the center of the claw pole seat 1a, a part of the claw pole petals 1b will not be able to enter the mating groove 15 (the center of the axial hole 1e deviates too much from the center of the claw pole seat 1a), and the coaxiality of the claw pole 1 is unqualified; or although all the claw pole petals 1b can enter the mating groove 15, they cannot be inserted to the bottom, that is, they will get stuck during the insertion process, and the coaxiality of the claw pole 1 is unqualified. If the centers of the jack 17, the core rod 11, and the axial hole 1e are located on the same straight line, all the claw pole petals 1b can smoothly enter the mating groove 15, and will not get stuck during the insertion process, so the coaxiality of the claw pole 1 is qualified.

[0044] If a protrusion appears on the inner surface of the claw pole petal 1b during the forging stage of the claw pole 1, the claw pole 1 cannot be laid flat after the claw pole petal 1b is inserted into the mating groove 15. If the protrusion is too large, the claw pole 1 will be tilted, and it can be directly concluded that the claw pole 1 is unqualified by observation. If the protrusion on the inner surface of the claw pole petal 1b is small, after pressing the claw pole 1 on the claw pole indexing detection component, gently shake the claw pole indexing detection component. If the claw pole 1 shakes, it can be judged that there is a protrusion on the inner surface of the claw pole petal 1b, and the claw pole 1 is unqualified.

[0045] Finally, it should be noted that the above-described implementation mode is only a preferred embodiment of the utility model to illustrate the technical solution of the utility model, and does not limit it, let alone limit the protection scope of the utility model; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the protection scope of the claims.

Claims

1. The detection tool for the claw pole of the AC generator rotor is characterized by: include: A mandrel (11) for detecting the coaxiality of the claw pole (1); A claw pole indexing detection component, the claw pole indexing detection component comprises a main body (12) and a claw flap (13), the circumferential surface of the main body (12) being a conical surface (14) cooperating with the inner surface of the claw pole flap (1b), the claw flap (13) being a plurality, the claw flaps (13) being arranged at intervals along the circumference of the main body (12), and a mating groove (15) for mating with the claw pole flap (1b) being formed between two adjacent claw flaps (13) and the conical surface (14) of the main body (12), the main body (12) being provided with a receiving groove (16) for accommodating a winding support (1c), the bottom of the main body (12) being provided with a plug hole (17) for mating with a core rod (11), the plug hole (17) and the receiving groove (16) being communicated with.

2. The detection tool for the claw pole of the AC generator rotor according to claim 1, characterized in that: The claw flap (13) comprises a first guide portion (13a) and a second guide portion (13b); one end of the first guide portion (13a) is located outside the axial end surface of the main body portion (12); the other end of the first guide portion (13a) is fixed to one end of the second guide portion (13b); and the second guide portion (13b) is matched with and fixed to the conical surface (14).

3. The detection tool for the claw pole of the AC generator rotor according to claim 2, characterized in that: The first guide portion (13a) is fan-shaped.

4. The detection tool for the claw pole of the AC generator rotor according to claim 1, characterized in that: A first arc surface (18) is formed between the inner wall surface of the accommodating groove (16) and the axial end surface of the main body (12) by chamfering.

5. The detection tool for the claw pole of the AC generator rotor according to claim 1, characterized in that: A second arc surface (19) is formed between the conical surface (14) and the axial end surface of the main body (12) by chamfering, and a second arc surface (19) is provided between two adjacent claw petals (13).

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