TWI673941B - Rotor short circuit ring combined structure and processing method thereof - Google Patents

Abstract

The invention discloses a rotor short-circuit ring combined structure and a processing method thereof, wherein the rotor short-circuit ring combined structure includes a rotor core, two porous ring pieces, a plurality of conductive copper pieces, a wire ring, two true rings, and two Short-circuit ring. The porous ring pieces are connected in series to the two ends of the rotor core. After the wire rings are connected to the conductive copper pieces one by one, the conductive copper pieces are inserted into the rotor core and the porous ring pieces, and the two ends of the conductive copper pieces are separated. It protrudes out of the axial section of the rotor core, and is combined with the constraints of each true ring to form a true circle arrangement. Each short circuit ring is integrally formed on both ends of the rotor core and the conductive copper sheet through a casting process. With the composition of the above-mentioned components, a short-circuit ring structure is formed by integrating the conductive copper sheets in an integrated manner, so as to overcome the troubles and problems of the conventional short-circuit ring production.

Description

Rotor short-circuit ring combined structure and processing method thereof

The present invention relates to a technical field related to a casting process, and in particular, to a rotor short-circuit ring combined structure used for rotor short-circuit ring production and a processing method thereof.

In the design of the motor, in addition to using the change in the phase of the alternating current to generate a fluctuating magnetic field, it can also use the fluctuating surrounding magnetic field to induce the intermediate rotor to generate a magnetic field. In this structure, the rotor no longer needs to be wound with coils, nor need carbon brushes. The structure greatly simplifies the structure of the rotor. Please refer to Figures 11 and 12, for example, squirrel-cage rotors of induction motors (single-phase and three-phase), a conductive copper sheet 92 (or rod) is inserted in an iron core 91 composed of stacked silicon steel sheets, and the two ends are used The short-circuit ring 93 is connected into a squirrel-cage type, and is induced by the surrounding changing magnetic field to generate eddy current and magnetic force and rotate.

The practice and structure of the short-circuit ring 93 are known. The short-circuit ring copper sheet 931 is nested on the end of the conductive copper sheet 92 protruding from the end of the core 91, and the short-circuit rings are made through the holes on the short-circuit ring copper sheet 931. The copper sheets 931 can be stacked and welded to each other to a certain thickness.

The manufacturing method of the short-circuit ring 93 described above has great disadvantages, because the middle of the short-circuit ring copper sheet 931 stack may not be tightly bonded, there must be a gap, and each short-circuit ring copper sheet 931 must be welded once. The process is quite equivalent. Slow, unfavorable industry production and quality can not be stable, yield and efficiency are not good.

In view of the problems and deficiencies of the above-mentioned conventional techniques, the main object of the present invention is to provide a rotor short-circuit ring combined structure and a method for processing the same.

According to the above object of the present invention, a combined rotor short-circuit ring structure and a processing method thereof are provided. The combined rotor short-circuit ring structure includes a rotor core, two porous ring pieces, a plurality of conductive copper pieces, a wire ring, and two true rings. , And two short-circuit rings. The porous ring pieces are connected in series to the two ends of the rotor core. After the wire rings are connected to the conductive copper pieces one by one, the conductive copper pieces are inserted into the rotor core and the porous ring pieces, and the two ends of the conductive copper pieces are separated. It protrudes out of the axial section of the rotor core, and is combined with the constraints of each true ring to form a true circle arrangement. Each short circuit ring is integrally formed on both ends of the rotor core and the conductive copper sheet through a casting process. With the composition of the above-mentioned components, a short-circuit ring structure is formed by integrating the conductive copper sheets in an integrated manner, so as to overcome the troubles and problems of the conventional short-circuit ring production.

10‧‧‧ rotor core

12‧‧‧ Silicon steel sheet

122‧‧‧ Core shaft hole

124‧‧‧copper socket

126‧‧‧ core perforation

20‧‧‧ porous ring

22‧‧‧ ring plate shaft hole

24‧‧‧ ring slot

26‧‧‧ ring perforation

30‧‧‧Conductive copper sheet

31‧‧‧through hole

32‧‧‧Slotted on the first side

33‧‧‧Slotted on the second side

34‧‧‧Slotted on the third side

35‧‧‧ melting section

40‧‧‧Wire loop

50‧‧‧ True Circle

52‧‧‧Inner ring groove

60‧‧‧short-circuit ring

S1 ~ S8‧‧‧ steps

<Habitual knowledge>

91‧‧‧ Iron core

92‧‧‧Conductive copper sheet

93‧‧‧short-circuit ring

931‧‧‧ Short-circuit ring copper sheet

FIG. 1 is a schematic diagram of an embodiment of a rotor short-circuit ring combined structure according to the present invention.

Figure 2 is a schematic sectional view of the embodiment shown in Figure 1.

Fig. 3 is a schematic diagram of local components of the rotor short-circuit ring combined structure of the present invention.

Fig. 4 is a schematic sectional view of the embodiment shown in Fig. 3.

Figure 5 is an exploded view of the embodiment shown in Figure 3.

Fig. 6 is a partial schematic view of the embodiment shown in Fig. 4;

Fig. 7 is a schematic diagram of the partial components of the embodiment shown in Fig. 5.

FIG. 8 is a schematic view of another embodiment of the embodiment shown in FIG. 3.

Fig. 9 is a partial schematic view of the embodiment shown in Fig. 2;

Fig. 10 is a schematic view of a method for processing a rotor short-circuit ring combined structure according to the present invention.

Fig. 11 is a schematic diagram of a conventional embodiment of a rotor short-circuit ring structure.

Fig. 12 is a partial schematic view of the embodiment shown in Fig. 11.

In the following, please refer to the related drawings to further explain the rotor short-circuit ring combination structure of the present invention and the embodiment of the processing method. In order to facilitate the understanding of the embodiments of the present invention, the same components are denoted by the same symbols.

Please refer to FIGS. 1 and 2, the rotor short-circuit ring combination structure of the present invention includes a rotor core 10, two porous ring pieces 20, a plurality of conductive copper pieces 30, a wire ring 40, two true rings 50, and Two short-circuit rings 60, among which: the above-mentioned rotor core 10, as shown in Figs. 3 to 5, are formed by stacking a plurality of silicon steel sheets 12 to form a columnar profile; wherein each silicon steel sheet 12 has a core shaft hole 122 , A plurality of copper sheet jacks 124, a plurality of iron core perforations 126.

The core shaft hole 122 is formed through the silicon steel sheet 12 at the top and bottom.

The copper plate insertion holes 124 are formed through silicon steel plates at the top and bottom, and the concentric iron core shaft holes 122 are arranged radially in a ring shape.

The iron core perforations 126 are formed through the silicon steel sheet 12 at the top and bottom, and are disposed between the iron core shaft hole 122 and the copper sheet insertion holes 124.

Each of the above-mentioned porous ring pieces 20, as shown in Figs. 3 to 5, is matched to the contour of the axial end face of the rotor core 10, and is connected in series to two axial ends of the rotor core 10, respectively. , A plurality of ring plate slot holes 24 and a plurality of ring plate perforations 26.

The ring plate shaft hole 22 is formed through the top and bottom of the concentric iron core shaft hole 122 through the porous ring plate 20.

The slot holes 24 of each ring piece are the tops of the concentric copper piece insertion holes 124, The bottom is formed through the porous ring sheet 20.

The perforations 26 of each ring piece are formed by perforating the top and bottom of each core core perforation 126 through the porous ring piece 20. During implementation, the ring plate perforations 26 are matched with the core core holes 126 to provide locking elements (bolts, nuts) to restrain the rotor core 10 and the porous ring plate 20.

The above-mentioned conductive copper sheets 30 are shown in Figs. 3 to 7 (the conductive copper sheet 30 shown in the figure has not been partially melted), and its outline is a long rectangular sheet body, which corresponds to each ring sheet slot hole 24. (Copper plate insertion hole 124) is inserted so that the second long side end of the conductive copper plate 30 is closer to the core shaft hole 122 of the rotor core 10 than the first long side. Moreover, one end of each conductive copper sheet 30 in the extending direction has a through hole 31, and the two ends of the conductive copper sheet 30 respectively have first, second, and three-side slots 32, 33, 34 and a melting section 35.

The first side slot 32 (see FIG. 6 and FIG. 7) is formed by recessing the first long side end of the conductive copper sheet 30. The first side slot 32 is a step slot; wherein, the first step 322 has an axial open end (the same below) along the extending direction of the conductive copper sheet 30 and a radial open end (the same below) ), And the second class 324 has only a radial open end. During implementation, the height of the first stage 322 of the first side slot 32 after assembly is lower than the height of the porous ring sheet 20, and the second stage 324 is higher than the porous ring sheet 20 (see FIG. 6).

The second side slot 33 (see FIG. 6 and FIG. 7) is formed by recessing the second long side end of the conductive copper sheet 30, and has an axially open end and a radially open end.

The third side slot 34 (see FIG. 6 and FIG. 7) is formed by being recessed adjacent to the second side slot 33 and corresponding to the second long side end of the conductive copper sheet 30, and has a radially open end.

The melting section 35 (see Figs. 6 and 7) is formed by the first, The two side slots 32 and 33 are jointly defined at the ends of the conductive copper sheet 30 in the extending direction.

The above-mentioned wire ring 40, as shown in Figs. 4 to 7, penetrates the through holes 31 of the conductive copper sheets 30 one by one to restrain the conductive copper sheets 30, and further prevents the conductive copper sheets 30 from being inserted into the rotor core 10 After the copper plate insertion hole 124 and the ring plate slot 24 of the porous ring plate 20 do not fall down along the axial direction of the rotor core 10.

The above-mentioned true ring 50, as shown in Figs. 3 to 6, and 8, is arranged on the second side slot 33 of each conductive copper sheet 30 so as to adjust each conductive copper sheet 30 along the outer diameter contour of the true ring 50 Arranged in a true circle (as shown in Figure 8). The true ring 50 has an inner ring groove 52. The inner ring groove 52 is formed in the inner ring wall of the true ring 50 in a radial depression.

The above short-circuit rings 60 are shown in Figs. 1, 2, and 9 respectively. They are partially provided on the porous ring sheet 20 by a casting process, and partially cover the end of the rotor core 10, and each conductive copper sheet 30. The ends (including the first, second, and third side slots 32, 33, 34 and the melting section 35) and the true ring 50 more partially melt the melting sections 35 of each conductive copper sheet 30 (as shown in FIG. 9).

Referring to FIG. 10 and cooperating with FIGS. 1 to 9, the processing method of the rotor short-circuit ring combination structure of the present invention includes the following steps:

Step S1: preparing a rotor core; a plurality of true-round contour silicon steel sheets 12 are processed by a processing machine (including but not limited to a punch or a cutting machine), and the core shaft holes 122 and the plurality of copper sheets on each silicon steel sheet 12 The insertion hole 124 and the plurality of iron core perforations 126 are formed by concentrically stacking each silicon steel sheet 12 俾 to form a columnar rotor core 10.

Step S2: preparing a porous ring sheet; a plurality of true circular contoured porous ring sheets 20 are processed by a processing machine (including, but not limited to, a punch or a cutting machine), and the ring sheet hole 22 and the plurality of circular ring sheets 20 The ring plate slot 24 and the plurality of ring plate perforations 26 are concentrically connected to the axial ends of the rotor core 10 respectively in cooperation with the locking element.

Step S3: preparing a plurality of conductive copper sheets; However, it is not limited to a punch or a cutting machine) to process a plurality of conductive copper sheets 30 that match the cross-sectional profile of the copper sheet insertion hole 124 and the ring sheet slot 24, and process through holes 31, first, and second on each conductive copper sheet 30. , And three-side grooves 32, 33, 34 and define a melting section 35.

Step S4: Connect the conductive copper sheets in series; pass the wire ring 40 through the through holes 31 of the conductive copper sheets 30 one by one to restrain the conductive copper sheets.

Step S5: insert each conductive copper sheet; separate each conductive copper sheet 30 from the other end of the through hole 31, corresponding to the ring slot 24 of the porous ring sheet 20 and each copper sheet insertion hole 124 of the iron core 10 from above Insert it downward and axially, and press the wire ring 40 against the end face of one of the porous ring pieces 20 (see Figure 6), and restrain each conductive copper piece 30 from going along the ring slot 24 (copper piece). The insertion holes 124) slide downward, and the two ends of each conductive copper sheet 30 protrude from both ends of the rotor core axis 10.

Step S6: heating the rotor core to pre-heat each of the conductive copper pieces: the outer peripheral side of the rotor core 10 is surrounded with a casting mold (not shown), and the rotor core is firstly passed through a heating device (not shown) 10 is heated, so that its heat is conducted to each conductive copper sheet 30 and its casting mold, and it is allowed to heat up to the preheating temperature to avoid the lack of rapid cooling in the subsequent steps. During implementation, the preheating temperature is between 400 and 600 degrees Celsius.

Step S7: Cast two short-circuit rings; inject a copper casting solution into the casting mold, allow the copper casting solution to locally accumulate on the porous ring sheet 20, and partially cover the end of the rotor core 10 and the ends of each conductive copper sheet 30 ( The first, second, and third sides of the grooves 32, 33, 34 and the melting section 35) and the true ring 50 more partially melt the melting section 35 of each conductive copper sheet 30 (as shown in FIG. 9).

Since the conductive copper sheet 30 and the casting mold have been preheated to a preset temperature, it can avoid the lack of rapid temperature drop when the copper casting liquid is injected. During the implementation, the centrifugal casting method or the vacuum casting method is selected as the casting method, so that the copper casting liquid partially fuses the conductive sections 30 of the conductive copper pieces 30 to form a hot melt and joins them together. The conductive copper sheet 30 can be covered with the conductive copper sheet 30 protruding from both ends of the rotor core shaft, and bubbles and impurities are concentrated toward the outer diameter surface due to centrifugation.

Step S8: polish and modify; trim the outer peripheral surface of the formed short-circuit ring 60 to remove protrusions, bubbles or impurities on the surface, and trim to a preset circle diameter.

The above description is only a preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Equal changes made by those skilled in the art based on the present invention , And changes well known to those skilled in the art, should still fall within the scope of the present invention.

Claims (8)

A rotor short-circuit ring combined structure includes: a rotor iron core, which is formed by stacking a plurality of silicon steel sheets to form a columnar contour body, and each of the silicon steel sheets has an iron core shaft hole and a plurality of copper sheets formed through the top and bottom respectively. A plurality of holes, and a plurality of perforations of the iron core; a plurality of porous ring pieces are connected in series at two ends of the rotor core in the axial direction, respectively, and have top and bottom penetrations formed concentrically with the core shaft hole and each of the copper piece insertion holes; , And one of the ring shaft holes, multiple ring slot and multiple ring perforations of each of the iron core perforations; a plurality of conductive copper plates, the outline of which is slightly long rectangular, and corresponds to each of the ring slot (each copper (Chip sockets) are inserted so that the second long side end of each conductive copper sheet is adjacent to the core shaft hole than the first long side of each conductive copper sheet, and each of the conductive copper sheets extends in one of the directions The end is provided with a through hole, and the two ends are respectively provided with a first, second, and three side grooves and a melting section; the first side groove is formed by depressions corresponding to the first long side ends of the conductive copper sheets. ; The second and three side grooves are respectively corresponding to the second long side end of each of the conductive copper sheets Formed; the melting section is jointly defined by the first and second sides slotted at the ends of the conductive copper sheet in the extending direction; a wire loop is extended through the through hole to connect the conductive copper sheets in series; a plurality of true rings , Are stacked on the corresponding second side slot respectively, and adjust each The conductive copper sheets are arranged in a true circle along the outer diameter contour of each true ring; a plurality of short-circuit rings are respectively fixed on the porous ring sheets and partially cover the rotor core, the ends of the conductive copper sheets, and The true ring; wherein each of the short-circuit rings further covers the first, second and third sides of each conductive copper sheet and the melting section, and partially melts the melting section. The rotor short-circuit ring combination structure according to item 1 of the scope of the patent application, wherein the first side slot is a step slot, and the first step of the first side slot has an axial direction along the extending direction of each conductive copper sheet. The open end and the radial open end orthogonal to the extending direction of each conductive copper sheet, and the second class of the first side slotted only has the radial open end orthogonal to the extending direction of each conductive copper sheet. According to the rotor short-circuit ring combination structure described in item 2 of the patent application scope, wherein the height of the first stage is lower than the stacked height of each of the porous rings, and the height of the second stage is higher than each of the porous rings. According to the rotor short-circuit ring combination structure described in item 1 of the scope of the patent application, wherein the true ring has an inner ring groove formed in a radial recess on an inner ring wall of the true ring. A processing method for preparing a rotor short-circuit ring combined structure according to any one of claims 1 to 4 in the patent application scope, which comprises: (a) preparing a rotor core; preparing each silicon steel sheet with the true circular contour; and each Forming each of the core shaft hole, each of the copper sheet insertion hole, and each of the core core perforation on the silicon steel sheet; (b) preparing a porous ring sheet; preparing each of the porous ring sheet, and forming the ring on each of the porous ring sheet; The shaft hole, the slot of the ring plate and the perforation of the ring plate are concentrically connected to the rotor core in series with the locking element. Axial ends; (c) preparing a plurality of conductive copper sheets; preparing each of the conductive copper sheets, and forming each of the through holes, the first, the second, and the third side grooves on each of the conductive copper sheets; And the melting section; (d) connecting each conductive copper sheet in series; passing the wire loop one by one through the through holes of each conductive copper sheet to restrain each conductive steel sheet; (e) inserting each conductive copper sheet; Each of the conductive copper pieces is different from the other end of the through hole, and the corresponding slot holes of the ring piece and each of the copper piece insertion holes are inserted axially from top to bottom, and the wire ring is pressed against the matching On each of the porous ring pieces, both ends of each of the conductive copper pieces protrude from both ends of the rotor core in the axial direction; (f) heating the rotor core to preheat each of the conductive copper pieces: surrounding the rotor with a casting mold The rotor core is heated on the outer peripheral side of the core by a heating device, so that the heat is conducted to the conductive copper pieces and the casting mold, and the temperature is raised to the preheating temperature; (g) two short-circuit rings are cast; injection A copper casting solution is poured into the casting mold, and the copper casting solution is locally accumulated on each of the porous rings, and the rotor core is partially covered, The end of the conductive copper sheet and the true ring more partially melt the molten section; (h) grinding and polishing; trimming the outer peripheral surface of each short-circuit ring after forming to remove protrusions, bubbles or impurities on the surface, and trimming To the preset circle diameter. Processing method of rotor short-circuit ring combination structure as described in the scope of application for patent No. 5 Method, wherein the casting method in step (g) can be performed by centrifugal casting. For example, the processing method of the rotor short-circuit ring combined structure described in the item 5 of the patent application scope, wherein the casting method in step (g) may be vacuum casting. According to the processing method of the rotor short-circuit ring combination structure described in the scope of the patent application, the preheating temperature in step (f) is between 400 and 600 degrees Celsius.