JPS599360Y2 - Rotor measurement lead wire support device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a support device for rotor measurement lead wires extending radially from a shaft hole of a rotating shaft.

A conventional support device for this type of lead wire was as shown in FIG.

The figure is a longitudinal cross-sectional view showing the upper half of the rotor. Reference numeral 1 denotes a rotating shaft, and a shaft hole 2 is provided from the shaft end to the shaft center.

3 is a rising hole penetrating radially from this shaft hole, 4 is a rotor core, 5 is a rotor coil, 6 is a bearing device, and 7 is a measurement! This slip ring is electrically extracted to the fixed side by a brush device (not shown).

Reference numeral 8 denotes a lead wire for measurement, which is drawn out from measurement points 4a and 5a of the rotor core 4 and rotor coil 5 to measure temperature, stress, etc., and runs along the outer periphery of the rotating shaft 1 through the rising hole 3 and into the shaft hole 2. , and reaches the connection part 9.

Here, it is connected to the connection line 10 of the slip ring 7.

11 is a line presser.

Reference numeral 12 denotes a lead wire support device, which holds the lead wire 8 by a holding screw 13 screwed into a screw hole 3a on the exit side of the upright hole 3.

This support device 12 is shown in cross-section in FIG.

Each lead wire 8 is tied together with a tie string 14 made of insulating material, fixed together with adhesive 15, passed through the center hole 13a of the retainer 13 which has not yet been attached, and then held as shown in the figure. 13 is screwed in.

In this way, the outer diameter of the portion drained by the tie string 14 is made larger than the inner diameter of the center hole 13a, and the lead wire 8 is held so that it does not slip out.

In the above-mentioned conventional device, centrifugal force acts on the lead wire 8 due to the rotation of the rotor, and the lead wire 8 is received by the bottom surface of the holding ring 13 at the three portions of the rising hole where the wire is tied together with the tie string 14 .

In a conventional lead wire support device, in a machine where the rotor rotates at high speed, the centrifugal force of the lead wire 8 in the 3 parts of the rising hole becomes strong, and the adhesive force of the 14 parts of the tie string 14, which has been dried up with the adhesive 15, is reduced. I can't stand it anymore.

For this reason, the lead wire 8 in this portion may float up in the radial direction and be cut, or the connection at the connecting portion 9 may be disconnected due to the lead wire in this portion being pulled.

This idea eliminates the above-mentioned drawbacks of the conventional one, and includes a support plate at the bottom of the retainer of the upright hole that pulls out the lead wire from the shaft hole in the radial direction. A plurality of holes or notches are provided in the circumferential direction at radial positions, each lead wire is passed through these holes or notches, each lead wire is tied with a tie string at the center position on both sides of the support plate, and each of these The leading end of the lead wire is pulled out from the center hole 13a of the holder, and even if a large centrifugal force is applied to the lead wire due to the rotation of the rotor, it is received by the holder via the support plate, preventing the lead wire from being cut. The object of the present invention is to provide a lead wire support device that prevents accidents such as connection parts coming off.

FIGS. 3 and 4 are a plan view and a sectional view showing an embodiment of this invention. 1, 3. 3a and 8 are the same as the conventional device described above.

Reference numeral 30 denotes a lead wire support device, which is constructed as follows.

Reference numeral 16 designates a receiving portion formed at the bottom of the boring hole 3a, and has a diameter larger than that of the rising hole 3.

Reference numeral 17 denotes a support plate fitted into the receiving portion 16, and as shown in the plan view of FIG. 5, a plurality of through holes 18 are provided in the circumferential direction at appropriate radial positions from the center.

The lead wires 8 are passed through each of the through holes, and each lead wire 8 is tied together in the center on both sides of the support plate 17 with a tie string 19 made of an insulating material.

Reference numeral 20 denotes a holding screw, in which the tip end of each lead wire 8 integrally supported by the support plate 17 is passed through a center hole 20a, brought out to the outside, and screwed into a screw hole 3a.

A counterbore 20b is provided in the center of the lower surface of the holding screw 20, and the lead wire 8, which has passed through the through hole 18 of the support plate 17 and is brought out to the surface side, is inserted into the counterbore 20b. The supporting plate 17 is received on the outer circumferential side of the lower surface.

The lead wire 8 passed through the center hole 20 a of the holding ring 20 and exited to the outside is fixed to the outer periphery of the rotating shaft 1 with a wire presser 11 .

In the device according to the above embodiment, when a centrifugal force is applied to the lead wire 8 of the rising hole 3 due to the rotation of the rotor, it is received by the support plate 17 that is integrally tied together, and this support plate 17 is attached to the retainer 20. It is accepted.

FIG. 6 is a plan view of a support plate according to another embodiment of the invention, in which the support plate 21 is provided with a plurality of notches 22 on the outer circumference, through which each lead wire 8 is passed and tied on both sides. It is all tied together in the center by a string 19.

FIG. 7 is a plan view of a support plate according to another embodiment of this invention, in which the support plate 23 is provided with a pair of through holes 24.

In addition, it is sufficient that there are two or more through holes in the support plate, and ■
Two or more lead wires may be passed through each hole.

As described above, according to this invention, the support plate is received on the lower surface side of the retaining screw screwed into the exit of the rising hole of the rotating shaft, and the support plate is provided with a plurality of radial positions distant from the center. The lead wires are passed through the through holes, and each of the lead wires is tied together in the center with a tie string on both sides of the support plate, so that the lead wires can be easily and reliably supported.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the upper half of the rotor showing a conventional support device for lead wires within the shaft, Figure 2 is an enlarged view of the support device in Figure 1, and Figure 3 is an example of this invention. FIG. 4 is a vertical sectional view of the support device portion of FIG. 3; FIG. 5 is a plan view of the support plate of FIG. 4;
7 and 7 are plan views of support plates showing other different embodiments of this invention. 1...Rotating shaft, 2...Shaft hole, 3...Rising hole, 3
a... Drilling hole, 8... Lead wire for measurement, 1
7...Support plate, 18...Through hole, 19...Tie-down string, 20...Retainer, 20 a...Center hole, 21
... Support plate, 22 ... Notch, 23 ... Support plate, 24 ... Through hole, 30 ... Support device. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] It passes through the shaft hole of the rotating shaft and rises in the radial rising hole,
In a device that supports a plurality of measurement lead wires taken out through the center hole of a retainer screwed into the outlet of this rising hole, there is a wire between the lower part of the retainer and the bottom of the vertical hole for this screw. A supporting plate having through holes or notches from the outer circumference, which are arranged at multiple locations in the circumferential direction at radial positions away from the center, and a support plate that is passed through each of these through holes or notches. A support device for a rotor measurement lead wire, characterized in that it is provided with a tie string that ties each of the measurement lead wires together in the center on both sides of the support plate.