JPH0529535Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a brake device for a vertical shaft rotating electrical machine such as a water turbine generator.

[Conventional technology]

Conventionally, this type of device was developed by improving the basic structure of the brake described in the "Electromagnetic Mechanism Components Selection Guidebook" (August 30, 1962, published by Nikkan Kogyo Shimbun, p. 189), for example, for vertical shafts such as water turbine generators. The fourth example is an example used in a brake device for a rotating electric machine.
As shown in the figure. In FIG. 4, 1 is a brake ring (not shown) attached to a rotating body of a water turbine generator, for example, and 2 is a yoke disposed on the lower surface of this brake ring 1, which has a vertical through hole 2a. .

3 is a built-in coil on the anti-brake ring side of the yoke 2, and 4 is disposed opposite the coil 3 on the anti-brake ring side of the yoke 2, and is attracted to the yoke 1 by the electromagnetic force of the coil 3 and rises. The suction piece 5 is connected to the suction piece 4 on one side and is inserted through the through hole 2a of the yoke 2, and the other side is a push-up body that protrudes from the upper surface of the yoke 2, extends near the lower surface of the brake ring 1, and moves up and down. , 6 is a brake lining installed on the push-up body 5.

Next, the operation will be explained. When the coil 3 is energized and a current flows through the coil 3, the attraction piece 4 moves to the yoke 2.
is attracted by electromagnetic force and rises. In conjunction with the lifting action of the suction piece 4, the push-up body 5 moves upward, the brake lining 6 is pressed against the brake ring 1, and the rotating body receives a braking force. It goes without saying that if the coil 3 is deenergized, the braking force on the rotating body is released.

[Problem that the invention attempts to solve]

Since the conventional brake device for a vertical shaft rotating electric machine is configured as described above, the magnitude of the braking force of the brake is determined by the electromagnetic force that attracts the suction piece 4 to the yoke 2, so the power supply voltage of the coil 3 When the electromagnetic force changes due to the fluctuation of

This invention was made to solve the above-mentioned problems, and the purpose is to obtain a highly reliable brake device for a vertical shaft rotating electric machine.

[Means for solving problems]

The brake device for a vertical shaft rotating electric machine according to this invention has a through hole formed in the suction piece at a position opposite to the through hole of the yoke, and one side of the push-up body is inserted into each through hole to connect the suction piece to the lower side. A compression spring is connected to the disposed push-up plate and presses the brake lining against the brake ring by the spring reaction force generated when the suction piece is compressed when the suction piece is attracted by the yoke by electromagnetic force. The braking force used to brake the rotating body by reaction force is kept constant.

[Effect]

In the braking device for a vertical shaft rotating electric machine in this invention, when the suction piece is attracted to the yoke, the compression spring is compressed, and the spring reaction force of the compression spring presses the brake lining against the brake ring, thereby applying a constant braking force to the rotating body. Brake.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 and 2. Figure 1 shows the state before brake operation, and Figure 2 shows the brake operation state. In each of these figures, 1 is a brake ring, 2 is a yoke, 2a is a through hole, 3 is a coil, and 5 is a push-up body. , 6 is a brake lining, 7 is disposed on the lower side of the yoke 2, and is attracted to the lower surface of the yoke 2 by the electromagnetic force of the coil 3 and rises, and a through hole 7a is formed in a position opposite to the through hole 2a of the yoke 2. , and one side of the push-up body 5 is connected to each through hole 2.
a, 7a. Reference numeral 8 denotes a push-up plate connected to one side of the push-up body on the lower side of the suction piece 7, and the drawing shows an example of a push-up plate arranged at appropriate intervals around the outer edge of the push-up plate 8, with the tip side facing upward. A case is shown in which a plurality of support rods 8a extending near the lower surface of the brake ring 1 are provided. Reference numeral 9 denotes a compression spring that presses the brake lining 6 against the brake ring 1 via the push-up body 5 by the spring reaction force generated when the suction piece 7 is compressed when it is attracted by the yoke 2. A case is shown in which compression springs 9 are respectively installed between the outer edge and the tip side of the support rod 8a of the push-up plate 8.

Next, the operation will be explained. When the coil 3 is energized and a current flows through the coil 3, the attraction piece 7 moves towards the yoke 2.
It is attracted to the bottom surface of the body by electromagnetic force and rises. As the suction piece 7 rises, the compression spring 9 installed between the outer edge of the suction piece 7 and the tip end of the support rod 8a of the push-up plate 8 and the push-up plate 8 also rise in conjunction. Therefore, the push-up body 5 connected to the push-up plate 8 moves upward, and the brake lining 6 is pressed against the brake ring 1. brake lining 6
After being pressed against the brake ring 1, only the suction piece 7 is attracted by the yoke 2 while compressing the compression spring 9 and moves up, so that the suction piece 7 and the push-up plate 8
The spring reaction force of the compression spring 9 between the two acts as a braking force on the brake ring 1 via the brake lining 6. The electromagnetic force that attracts the suction piece 7 from the yoke 2 acts as a force that compresses the compression spring 9, but the force exceeding the spring force acts as a force that raises the suction piece 7 and an action-reaction force after the suction piece 7 and the yoke 2 come into contact. Therefore, only the spring reaction force of the compression spring 9 is transmitted to the push-up plate 8. As a result, a constant braking force can always be obtained by the spring reaction force of the compression spring 9 even when the electromagnetic force changes due to fluctuations in the power supply voltage or the like.

In the above embodiment, the compression spring 9 is provided between the tip of the support rod 8a at the outer edge of the push-up plate 8 and the outer edge of the suction piece 7, but as shown in FIG. The spring 9 may be provided in the through hole 2a of the yoke 2 between the inner edge of the suction piece 7 and the other side 5a of the push-up body 5; A compression spring 9 may be provided between them, and the same effect as in the above embodiment can be achieved.

[Effect of idea]

As explained above, this device has a through hole formed in the suction piece at a position opposite to the through hole of the yoke, and one side of the push-up body is inserted through each through hole, and the push-up body is disposed on the lower side of the suction piece. A compression spring is connected to the raised plate and presses the brake lining against the brake ring by the spring reaction force generated when the suction piece is compressed when it is attracted by the yoke by electromagnetic force.The spring reaction force of this compression spring causes the brake lining to rotate. By keeping the braking force that brakes the body constant, it is possible to always obtain a constant braking force even when electromagnetic force changes due to fluctuations in power supply voltage, etc. This has the effect of providing highly reliable products.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing the braking operation state of the brake device of a vertical shaft rotating electrical machine according to an embodiment of this invention before braking operation, and FIG. 3 is a sectional view showing the braking operation state of a vertical shaft rotating electrical machine according to another embodiment of this invention. FIG. 4 is a sectional view showing a conventional brake device for a vertical shaft rotating electric machine. In the figure, 1 is a brake ring, 2 is a yoke, 3 is a coil, 5 is a push-up body, 6 is a brake lining, 7 is a suction piece, 8 is a push-up plate, and 9 is a compression spring. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A brake ring attached to the rotating body of a vertical shaft rotating electrical machine, a yoke disposed on the underside of the brake ring, containing a coil and having a vertical through hole, and this brake ring. a suction piece disposed on the side opposite to the brake ring of the yoke, which is attracted to the yoke by the electromagnetic force of the coil and has a through hole at a position opposite to the through hole of the yoke; A push-up plate is inserted, one side of which is located on one side of the suction side, and the other side of which extends near the bottom surface of the brake ring and moves up and down. a brake lining that is pressed against the brake ring and brakes the rotating body; a push-up plate that is connected to one side of the push-up body below the suction piece; and a push-up plate that is attached to the suction piece and that is attached to the suction piece. a compression spring that presses the brake lining against the brake ring by a spring reaction force generated when the brake lining is compressed when it is attracted by the yoke. (2) The push-up plate has multiple supports on its outer edge whose tips extend near the bottom surface of the brake ring, and a compression spring is installed between the tips of these supports and the outer edge of the suction piece. A brake device for a vertical shaft rotating electrical machine as set forth in claim 1 of the utility model registration claim. (3) The brake device for a vertical shaft rotating electric machine according to claim 1, wherein the compression spring is installed between the suction piece and the brake lining within the through hole of the yoke.