JPH03143236A - Salient-pole type rotary electric machine - Google Patents

Abstract

PURPOSE:To decrease the number of parts, and to exchange a rotor winding easily by mounting a pole head onto the outer surface of the magnetic pole section of a gear-shaped rotor core and coating the mounting surface of the pole head and a bolt clamping the pole head to the magnetic pole section of the rotor core with a release agent. CONSTITUTION:A rotor core 3, to which ten magnetic pole sections are set up as the tooth section of a spur gear and which is made of an electrode iron plate, is press-fitted at the center of the outer circumference of a rotor shaft IC, on the outer circumference of a center of which five square bars loa are welded at regular intervals, rotor windings 2 are inserted to each magnetic pole section respectively, and massive pole heads 4 are clamped to each magnetic pole section by a plurality of bolts 5 in the outer surfaces of the cores of each magnetic pole section. The undersides of each pole head 4, the bolts 5, double-end studs 6a, etc., are coated previously with a release agent and the inlet, etc., of the through-hole of the rotor shaft 10 are sealed on assembly before the impregnation of an epoxy resin, and the whole is inserted into a vacuum impregnating tank composed of the epoxy resin. Accordingly, an electrically and mechanically stable salient-pole type rotary electric machine can be acquired.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a fully impregnated salient pole rotary electric machine.

(Prior Art) In FIG. 3 showing an example of a conventional fully impregnated protruding rod type rotating electrical machine, a rotor shaft 1 is made of an electromagnetic iron plate with a plurality of approximately trapezoidal grooves 6a provided on the outer periphery. An annular rotor rim plate 6 is press-fitted into the groove 6a of the rotor rim plate 6, and a trapezoidal tab tail 7 protruding from the lower end of the magnetic pole 9 made of electromagnetic iron plate with the rotor winding 2 inserted into the outer periphery is inserted into the groove 6a of the rotor rim plate 6. A magnetic pole key 8 is inserted between the lower end of the tab tail 7 and the bottom of the groove 6a.

Moreover, magnetic pole bars 10 for flowing a starting current are respectively attached to the outer surface of the magnetic poles 9, and bar shorting plates 11 are provided between each magnetic pole.

In the protruding rod type rotating electric machine having such a configuration, after the rotor rim plate 6 is inserted into the rotor shaft 1, the magnetic pole 9 to which the rotor winding 2 and the magnetic pole bar 10 are attached is attached with the magnetic pole key 8. The bar shorting plate 11 is attached and impregnated with epoxy resin in an epoxy resin vacuum impregnation tank, dried and hardened in a heating furnace, and then cooled.

As a result, the heat resistance of the rotor winding 2 is Class F of the electrical equipment insulation type specified by the Institute of Electrical Engineers Electrical Standards Committee (JRC-147), and other mechanical properties and environmental resistance properties are also uniform and excellent. This makes it a highly reliable salient pole rotating electric machine.

(Problem to be Solved by the Invention) However, in the fully impregnated bridge-type rotating electric machine configured as described above, the electric, mechanical and chemical properties are uniform and uniform as described above due to the complete impregnation of the epoxy resin. While this is excellent, it also has a drawback in terms of maintenance, for example, that it is difficult to remove the magnetic pole 9 from the rotor rim plate 6.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to obtain a fully impregnated salient pole rotating electrical machine that has excellent mechanical, electrical, and chemical properties and is free from the risk of impairing maintainability.

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention provides a magnetic pole head on the outer surface of the magnetic pole part of a gear-shaped rotor core in a fully impregnated salient pole rotating electric machine, and the mounting surface of the magnetic pole head and the By applying a release agent to the bolts that fasten the magnetic pole head to the magnetic pole part of the rotor core, the number of parts can be reduced and rotor windings can be easily replaced, improving electrical, mechanical, chemical properties, and maintainability. This is a fully impregnated salient pole rotating electric machine with excellent efficiency and constant quality.

(Embodiment) Hereinafter, one embodiment of the salient pole type rotating electrical machine of the present invention will be described with reference to three drawings. However, parts that overlap with Figure 3 are omitted.

FIG. 1 is a front view showing the main parts of a salient pole type rotating electrical machine of the present invention, and FIG. 2 is a detailed cross-sectional view taken along line XX in FIG. 1.

In Figures 1 and 2, a rotor shaft 10 has a through hole in its shaft center and five square rods 1.0a are welded at equal intervals to its central outer circumference. Ten magnetic pole parts are located at the center of the outer circumference of the rotor shaft 10. A rotor core 3 made of an electrode iron plate provided like the teeth of a spur gear is press-fitted, a rotor winding 2 is inserted into each magnetic pole, and a block-like core is formed on the outer surface of the core of each magnetic pole. The magnetic pole head 4 is a plurality of bolts 5
are tightened to each magnetic pole part. Moreover, a plurality of approximately wedge-shaped coil brackets 6 are installed between each rotor winding 2, and a double-threaded bolt whose lower end is screwed into a female thread provided at the bottom between each magnetic pole of the rotor core 3. 6a, respectively.

Furthermore, inner fans 7 are provided on the left and right sides of the rotor core 3 on the rotor shaft lO, respectively.

In a salient pole rotating electric machine having such a configuration, a release agent is applied in advance to the lower surface of each magnetic pole head 4, bolts 5, double-threaded bolts 6a, etc. during assembly before impregnation with epoxy resin, and the through holes of the rotor thin 10 are coated with a release agent. The inlet etc. are sealed and inserted into a vacuum impregnation bath of epoxy resin.

Therefore, in the salient pole rotating electric machine configured in this way, when replacing the rotor winding 2, the bolts 5 can be easily removed, and the rotor winding 2 can also be heated to replace the rotor winding 2. Can be replaced.

In addition, unlike conventional methods, there is no need to connect magnetic pole bars or bar shorting plates, and each magnetic pole does not require tab tail keys to be inserted, making assembly easy. This results in a salient pole type rotating electrical machine that has excellent physical characteristics and is free from the risk of impairing maintainability.

Furthermore, the axial gap formed between the square rods 10a becomes a passage for cooling air by the inner fan 7, which not only improves the cooling effect of the rotor core 3, but also allows the rotor core 3 to pass through the magnetic poles. Since the magnetic resistance is reduced as a whole, a salient pole type rotating electrical machine with good efficiency and uniform characteristics can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, in a fully impregnated type salient pole rotating electric machine, a magnetic pole head is provided on the outer surface of the magnetic pole part of the gear-shaped rotor core, and the mounting surface of the magnetic pole head and the magnetic pole head are connected to the rotor core. By applying a release agent to the bolts tightened to the magnetic poles, we have reduced the number of parts and made it easier to replace the rotor windings, resulting in excellent electrical, mechanical, and chemical properties, consistent quality, and ease of maintenance. An efficient fully impregnated salient pole rotary electric machine can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of essential parts showing an embodiment of a fully impregnated salient pole rotating electric machine of the present invention, Fig. 2 is a detailed cross-sectional view of 1 is a detailed vertical cross-section of a main part showing an example of an impregnated salient pole rotating electric machine.

Claims (1)

[Scope of Claims] In a fully impregnated type salient pole rotating electric machine, a magnetic pole head is provided on the outer surface of the magnetic pole part of a gear-shaped rotor core, and a mounting surface of the magnetic pole head and this magnetic pole head are fixed to the rotor core. A fully impregnated salient pole rotating electrical machine characterized by having fasteners coated with a release agent.