JPH03155356A - Assembly of winding conductor securing wedge - Google Patents

Abstract

PURPOSE:To eliminate fluctuation due to each worker by inserting a calibrated regulating slide gage into a slot and regulating the profile of a slide board with reference to the scale on the slide gage at that time and then driving a wedge. CONSTITUTION:A spring balance 12 fixed with a guide board 11 is applied through a spring section 13 to one side of a slide gage 8 so that the inserting direction will match on a same extension, and then the spring balance 12 integrated with the guide board 11 is pressed in the inserting direction of the slide gage 8 while reading out the scale 12a on the spring balance 12. After confirmation that the inserting pressure of the slide gage 8 has reached a predetermined level, the spring balance 12 and the slide gage 8 are removed from the slot 1 and the profile of a spacer 4 below a wedge is conditioned according to the scale 12a. The conditioned slide board is then employed for driving a wedge into the slot 1 thus finishing securing work of upper and lower coils 3a, 3b to the slot. By such arrangement, pressure inserting force of the slide board can be managed mechanically and the coil can be secured highly reliably.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of assembling a fixing wedge for fixing a winding conductor in a slot of an iron core.

(Prior Art) As a winding conductor, for example, a two-layer armature coil of a rotating electric machine is subjected to an electromagnetic force having a frequency twice the power supply frequency due to a current flowing through the conductor of the coil. If the binding force of the coil is insufficient, the armature coil will vibrate due to this electromagnetic force, and the insulation layer of the armature coil will be shocked or worn out, causing insulation failure. After being stored, it is fixed by a corrugated plate spring of a coil fixing member made of fiber-reinforced plastic inserted between a wedge inserted from the longitudinal end into the opening of the slot and the armature coil. This fixes the armature coil using the spring pressure of the coil fixing member.

In recent years, there has been a strong tendency for rotating electric machines to increase in capacity, and as a result, the current flowing through the armature coils has also increased. Naturally, the electromagnetic force generated in the coils also increases rapidly as the square of the current. Therefore, long-term vibration prevention and heat conduction From a maintenance perspective, the ability to properly hold and secure the coil in the slot is of particular importance in improving reliability.

A conventional process for fixing an armature coil with a wedge will be described with reference to FIGS. 7 to 1θ.

Place the spacer (2) in place in the slot (1) of the iron core.
Store the lower coil (3a) and upper coil (3b) across them. In the next step, each insulating member made of a laminate plate impregnated with synthetic resin is temporarily inserted into the slot (1) in order to check the finished dimensions in advance. That is, a wedge spacer (4) whose plate thickness can be selected as appropriate is placed on the surface of the upper coil (3b), and a corrugated leaf spring (5) that presses the coil toward the bottom of the slot is placed on top of the wedge spacer (4), and a groove-shaped inclined spacer is placed on top of the wedge spacer (4), the thickness of which can be selected as appropriate. A tapered wedge (6) having a surface (7) is inserted with the inclined surface (7) facing the coil (3) side.

Next, attach a slide gauge (8) with an inclined surface (9) similar to the tapered wedge (6), so that the inclined surfaces are similar to the tapered wedge (6).
Taper wedge (6) and corrugated plate spring (5) so that they are in close contact with
As shown in Fig. 9, the slide gauge (8) is inserted between the slopes (9
), on which scales are carved at equal intervals Q(a+■) around the base line, and the height ho of the slide gauge (8) at the base line located in the center is the slide plate shown in Fig. 10, which will be used regularly later. The same height h2 at the predetermined position of (lO) and the coil (
3) is processed so that the height h2 when compressed is added to the wave spring (5) which can always apply an appropriate pressure.

In this case, the deviation per scale is ±1/LX Q
The height adjustment corresponding to (++1) is performed by adjusting the thickness and number of the wedge spacers (4).

In addition, the corrugated leaf spring (5) has a compressive load of -
It has a displacement characteristic and shows a fixed spring constant within the range of use, and by selecting the compression ratio of the corrugated plate spring (5), the force applied to the coil (30) as its restoring force can be adjusted. It is something.

After adjusting the total thickness of the wedge spacer (4),
Remove the slide gauge (8) and replace it with the slide plate (
10) was inserted and driven in with a hammer, etc. to fix the coil.

(Problem to be Solved by the Invention) In the above-mentioned prior art, in the process of inserting the slide gauge (8), since the slide gauge (8) is inserted in the axial direction by manual force, the insertion depth of the slide gauge (8), which is a key point, that is, the inclined part (9) The upper scale position is measured based on human sense and judgment 1
It had been judged.

As a result, the pressure that should be applied to the coil (3) by the corrugated leaf spring (5) in an appropriate and uniform manner may vary due to individual differences among workers, and may not be managed thoroughly, resulting in low reliability and poor characteristics. It was an assembly device that provided a uniform coil fixation state.

(Purpose) The present invention can mechanically manage the pushing pressure of the slide plate.
An object of the present invention is to provide a method for assembling a wire-wound conductor fixing wedge with high reliability and uniform characteristics.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the winding conductor inserted into the slot of the iron core is pressed against the wedge spacer and the conductor near the longitudinal opening of the slot. In an assembly method in which a tapered wedge divided into two layers and having an inclined surface is fixed by driving a slide plate through a corrugated leaf spring, before driving the slide plate, a tapered part having the same shape as the slide plate and a scale in the longitudinal direction is attached. Insert the adjustment slide gauge with a predetermined pressure in the slot insertion direction, and at least one of the shape of the slide plate or the dimensions of the wedge spacer is determined based on the scale of the adjustment slide gauge at this time. Adjust one side and drive in the slide plate.

(Function) According to the above means, the mechanical pressure of the corrugated leaf spring can be detected by the scale of the adjustment slide gauge, so the thickness J of the wedge spacer or the slide plate that matches the scale can be detected. Since the dimensions can be obtained, variations due to individual differences among workers are eliminated, and the method for assembling the wire-wound conductor fixing wedge is highly reliable and has uniform characteristics.

(Example) Example 1 The first example of the present invention will be described below with reference to FIG. 1, a longitudinal sectional view of the slot portion, FIG. 2, a side view of the main part of the same figure, and FIG. Explain with reference to.

A spring balance (12) with a guide plate (11) attached is applied to one end of a conventional slide gauge (8) via its spring part (13) so that the insertion direction is aligned on the same extension line. While reading the scale (12a) of (12), pressurize the spring scale (12) integrated with the guide plate (11) in the insertion direction of the slide gauge (8). Next, after confirming that the insertion pressure of the slide gauge (8) has reached a predetermined value, remove the spring scale (12) and slide gauge (8) from the slot (]) and lower the wedge according to the scale (12a). Adjust the total thickness of the spacer (4) or change the dimensions of the slide plate, and finally insert the slide plate (10), which is made of a laminated plate impregnated with a synthetic resin for regular use, into the slot (1) using a hammer, etc. Drive in the upper and lower coils (3a)
, the fixing work of (3b) to the slot (1) is completed.

Next, the operation of the first embodiment will be explained. With the above configuration, the repulsive force of the spring portion (13) is transferred to the slide gauge (8).
), the gauge (8) slides in the insertion direction, and at the same time the scale of the spring balance (12) aligns with the guide plate (11).
), the current pressure applied to the slide gauge (8) can be read immediately, and when the scale indicates a predetermined value, if the pressure applied to the spring scale (12) is stopped, It becomes possible to manage the insertion pressure of the slide gauge (8) into the slot (1) based on numerical values.

This solves the conventional difficulty of fixing the coil (3) in the slot with an appropriate and uniform pressure force, such as variations in pressure force due to individual differences among workers, and incomplete pressure control. However, there is an effect that a coil fixed state with high reliability and uniform characteristics can be obtained.

Example 2 As a second example, as shown in FIG. 3, after pressure adjustment,
When punching out the slide gauge (8) from the slot (1), protrusions (14) are provided at both ends of the guide plate (11) and the slide gauge (8) where they come into contact to engage them.

If the structure is such that the gauge (8) can also be removed in conjunction with the work of removing the spring scale (12) in the opposite direction of insertion, the workability will be simplified compared to the first embodiment.

Embodiment 3 As shown in FIG. 4, instead of the spring scale (12), a weight (15) with a predetermined load is fixed to the end of the slide gauge (8), and the slide gauge (8) is moved using its gravity. It is also possible to insert it into the slot (1) of 8) and manage the pressurizing force.

Example 4 A slide plate (10) for regular use as shown in Fig. 5
It has an adjustment scale and protrusions (14) on both ends where the slide plate (10) and the guide plate (11) touch, and also has protrusions (14) in the slot width direction of the guide plate (11) that sandwich the slide plate (10). The width (see Figure 2) is the slide plate (1
0) in the same direction. On the other hand, V engineering≦υ. If it is processed so that it can be used as a substitute for a slide gauge, and the slide plate (10) can also be removed when the spring scale (12) is inserted and removed in the opposite direction if necessary, work efficiency and economy will be improved. Further improvement.

〔Effect of the invention〕

As described above, according to the present invention, the pushing pressure of the slide plate can be mechanically managed, and a highly reliable winding conductor fixing wedge can be assembled.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a state in which a slide gauge is inserted into a slot in one step of the first embodiment of the method of the present invention, FIG. 2 is a side view of the spring weighing section of FIG. 3 and 4 are side views showing the parts corresponding to FIG. 2 of the second and third embodiments, FIG. 5 is a perspective view showing a slide plate used in the fourth embodiment, and FIG. 6 is a diagram showing the present invention. 7 is a longitudinal cross-sectional view showing a state in which a slide gauge is inserted into a slot in one step of the conventional method, and FIG. 7 is a sectional view along the line ■-■, FIG. 9 is a perspective view showing the slide gauge in FIG.
Figure O is an elevational view showing a slide plate used in the conventional example and the first and second embodiments. 1...Slot, 2...Spacer,
3a, 3b... lower coil and upper coil which are winding conductors, 4... wedge spacer, 5... corrugated leaf spring, 6... tapered wedge, 7... inclined surface of tapered wedge. 8...Slide gauge. 9... Slanted surface of slide gauge, 10... Slide plate.

Claims (1)

[Claims] The wire-wound conductor inserted into the slot of the iron core is driven into two layers by a tapered wedge with an inclined surface and a slide plate, through a wedge spacer and a corrugated leaf spring that presses the conductor near the longitudinal opening of the slot. In the fixing assembly method, before driving the slide plate, an adjustment slide gauge having a tapered part of the same shape as the slide plate and a scale in the longitudinal direction is inserted by applying a predetermined pressure in the slot insertion direction. Based on the scale of the slide gauge for adjustment at the time, the shape of the slide plate or the dimensions of the spacer under the wedge,
A method for assembling a winding conductor fixing wedge, characterized in that at least one of the wedges is adjusted and a slide plate is driven in.