JPS6129982Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a restoring mechanism that restores the movement of a servo motor to an actuator section in an electric governor for a hydraulic power generator.

The speed governor has the role of adjusting the input to the water wheel so that the water wheel outputs an output corresponding to the load of the generator at a predetermined rotation speed. In other words, this speed governor is a device that adjusts the input, or flow rate, of the water turbine in order to keep the rotational speed of the water turbine almost constant and adjust the output. It is equipped with a restoration mechanism that restores the actuator to its original state, as well as a pressure oil device. The function of this electric speed governor will be briefly explained using, for example, when the load increases. First, a change in load is converted into a mechanical displacement within the converter to operate a pressure regulating valve, and the pressure oil flowing through the valve is supplied to a servo motor to move a piston. The movement of this servometer is transmitted to the return shaft via a bell crank, link, etc. connected to the piston rod, and drives the restoring mechanism via a gear train. The restoring mechanism includes a selsin oscillator that instructs the opening degree of the guide vane, a potentiometer that controls the current value of the movable coil of the converter to fix the operation of the guide vane at an opening degree commensurate with the load, and a load control device. It consists of the Camry Mitsutoshi Switch. In the conventional restoration mechanism, as shown in FIG. 1, a cam limit switch 103 and a potentiometer 104 are directly connected to a bracket 102 fixed to a governor frame 101 with a coupling 109, and then mounted via a bearing 110. On the other hand,
Above it, another bracket 105 is mounted so as to cover the celsyn transmitter 106, and each is provided to mesh with a gear 108 of a return shaft 107. Therefore, a large installation space is required.

The purpose of this invention is to simplify the mounting structure of the cam limit switch, sershin transmitter, and potentiometer that make up the restoring mechanism in an electric speed governor used in a water turbine for power generation, thereby reducing the installation space. do. The configuration of the present invention that achieves this purpose includes a sershin oscillator, a potentiometer, and a cam limit switch that constitute a restoring mechanism, a return shaft provided in the governor frame,
a gear fixed to the return shaft; a bracket fixed to the governor frame and supporting one of the Selsyn transmitter, the potentiometer, and the cam limit switch; and the Selsyn transmitter;
Of the potentiometer and cam limit switch, the gear is fixed to the rotating shaft supported by the bracket and meshed with the gear of the return shaft; Two support plates each supporting two things other than those supported by the bracket, the bracket and one of the two support plates, and the two support plates are connected to each other, and the sercin oscillator, potentiometer, The present invention is characterized in that it has a double-threaded bolt that arranges the rotating shafts of the cam limit switch on one axis, and a coupling that connects the rotating shafts of the Sershin transmitter, the potentiometer, and the cam limit switch to each other.

The configuration of the present invention will be explained in detail below based on an embodiment shown in the drawings and FIG.

The Celsin transmitter 1, the potentiometer 2, and the cam limit switch 3 are arranged on one axis via a flexible shaft joint 4, and are interconnected by a double-threaded bolt 5. It is fixed to a square-shaped bracket 7 that is screwed directly to the governor frame 6 of the Sershin transmitter 1, and the pinion gear 8 is passed through the bracket 7 to connect the gear 9 of the return shaft 10.
mesh with. A potentiometer 2 fixed to a support plate 11 is attached to a bracket 7 with double-threaded bolts 5 at the rear of the Sershin oscillator 1. Furthermore, behind this, a cam limit switch 3 fixed to a support plate 11 is attached to the front support plate 11 with double-threaded bolts 5. A nut 12 is fixed to the support plate 11 by welding or the like on both the front and back sides thereof, and a hole is bored in the center through which the rotating shaft passes. Of course, nuts 12 are fixed to the bracket 7 at the four corners corresponding to the nuts 12 of the support plate 11. The bolts 5 have opposite threads cut at both ends, and when screwed together with the nuts 12, the bolts 5 can be turned like a turnbuckle between the bracket 7 and the support plate 11 or between the support plates 11. Just bring them together and try to connect them. If high accuracy is not required, the potentiometer 2 may be omitted, so the cam limit switch 3 can be placed behind the sershin transmitter 1, so the sershin transmitter 1 is placed closest to the gear 9. There is.

In this way, the present invention arranges the Selsyn transmitter, potentiometer, and limit switch on one axis via a coupling ring, connects them to each other with double-threaded bolts, and then attaches them to the governor frame. It takes up less installation space than the conventional one, which was installed separately. Moreover, each device can be installed and removed extremely easily by simply turning the double-threaded bolts, and even if the dimensions of each device change, it can be easily accommodated by changing the length of the double-threaded bolts.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional restoration mechanism mounting structure, and FIG. 2 is a schematic diagram showing a restoration mechanism mounting structure of the present invention. In the drawing, 1 is a cell-syn transmitter, 2 is a potentiometer, 3 is a cam limit switch, 4 is a coupling, 5 is a double-threaded bolt, 6 is a governor frame, 7 is a bracket, 8 is a pinion gear, 9 is a gear, 10 is a return shaft, 11 is a support plate, 1
2 is Natsu.

Claims (1)

[Scope of Claim for Utility Model Registration] The sershin transmitter, potentiometer, and cam limit switch that constitute the restoring mechanism, the return shaft provided in the speed governor frame, the gear fixed to this return shaft, and the speed governor A bracket fixed to the machine frame and supporting one of the Sershin transmitter, potentiometer, and cam limit switch; and a rotating shaft of the Sershin transmitter, potentiometer, and cam limit switch supported by the bracket. a gear fixed to the return shaft and meshed with the gear of the return shaft; and two support plates each supporting two of the Sershin transmitter, potentiometer, and cam limit switch other than the one supported by the bracket. , the bracket and one of the two support plates, and 2
a double-threaded bolt that connects the two support plates to each other and arranges the rotating shafts of the Sershin transmitter, potentiometer, and cam limit switch on one axis; and rotation of the Sershin transmitter, potentiometer, and cam limit switch. An electric speed governor for hydroelectric power generation that has a coupling that connects adjacent shafts.