JPS6027261B2 - Brake and jack device for rotating electric machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake/jack device for a rotating electric machine.

Rotating electrical machines such as water turbine generators and generator motors are provided with a brake device for controlling the rotor and a jacking device for lifting the rotor during disassembly and assembly of the rotating electrical machine.

Although the brake device and the jack device are sometimes provided separately, recently, due to the installation location, a device that serves as both the brake device and the jack device has been used. A commonly used brake/jack device will be explained with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a brake ring that is attached to a shaft (not shown) of a rotor and rotates together with the rotor. A pressing device 8 is arranged in the vicinity thereof. This pressing device is composed of a brake shoe 2 disposed opposite to a brake ring, a shoe holder 3 for receiving the brake shoe, a cylinder 4, and a piston 5 within the cylinder. A pressure supply port 6 and a pressure discharge port 7 are provided near the bottom of the cylinder 4 . Since the brake pressure is lower than the jack pressure, the brake pressure supply source and the jack pressure supply source are provided separately. FIG. 2 is a supply and exhaust pressure system diagram of the brake/jack device. A plurality of pressing devices 8 are used,
As described above, these are arranged in a circular manner close to the brake ring 1, and are passed through each other by the connecting pipe 113. At one end of this connecting pipe 13 is a pressure supply pipe 14,
Exhaust pressure pipes 11 are connected to the pond ends, and supply pressure pipes 14 and 8E pressure pipes 11 are connected to an oil tank 21. A high pressure pump 15 and a check valve 16 are installed in the middle of the pressure supply pipe 14.
, and exhaust pressure pipes 18 each having a valve 19 are attached thereto. On the other hand, in the middle of the 9E pressure pipe 11, there is a brake low pressure side supply pressure pipe 9 having a valve 10, a valve 12, a galvanic plate 20
are attached to each. When braking a rotating rotor, close valve 12 of exhaust pressure pipe 11 and valve 17 of supply pressure pipe 14, and close valve 1 of low pressure side supply pressure pipe 9 for brake.
0 is opened to apply strip pressure into the cylinder 4 of each pressing device 8, and the brake shoe 2 is pressed against the brake ring 1 to control the rotor.

On the other hand, when used as a jack device, valve 10 of the brake low pressure side supply pressure pipe 9, valve 1 of the Enoki E pressure pipe 11,
2, 8E By closing the valves 19 of the pressure pipe 18 and opening the valve 17 of the pressure supply pipe 14, the oil tank 21
The pressure is increased through the high-pressure pump 15 from the
Oil is pumped into the cylinder 4.

As the piston 5 rises, the rotor is lifted. After using it as a jack device, the low pressure side supply pressure pipe 9
1 valve 10, exhaust pressure pipe 1 1 valve 12, supply pressure pipe 14
and the valve 19 of the exhaust pressure pipe 18 are opened. Then, air is sent from the low pressure side supply pressure pipe 9, and the exhaust pipe 1
The mechanism is such that air is supplied until the oil is no longer visible from the galvanometer plate 20 attached to the cylinder 1, and the oil in each cylinder is discharged. This is because it would take several tens of hours to drain the oil using only the weight of the piston 5, but ordinary water turbine generators often cannot allow such a long stoppage, so compressed air is pumped in to drain the oil in a short time. I'm trying to drain it. In this conventional brake/jack device, the connecting pipe 13→
Since a galvanometer plate is not attached to the line from the pressure supply pipe 14 to the exhaust pressure pipe 18, it is impossible to confirm whether or not the oil in the cylinder 4 in each pressing device 8 has been completely discharged.

In addition, since the fluid resistance in the discharge pipe 11 is much smaller than that in the line from the connecting pipe 13 → pressure supply pipe 14 → exhaust pressure pipe 18, even if oil is not visible from the galvanometer plate 20, the cylinder 4
Oil may remain inside, which poses a problem in terms of reliability. The object of the present invention is to eliminate the drawbacks of the prior art mentioned above,
To provide a brake/jack device for a rotating electrical machine that can completely discharge oil in a cylinder.

In order to achieve this object, the present invention provides a valve in the middle of a high-pressure supply pressure pipe, connects a low-pressure brake supply pressure pipe with a valve between this valve and the pressing device, and connects a low-pressure supply pressure pipe for brakes with a valve between the valve and the pressing device, and detects the pressure in the middle of the exhaust pressure pipe. It is designed to have a flow plate attached to it.

Next, a brake/jack device according to an embodiment of the present invention will be explained with reference to FIG.

The structure of the pressing device 8 is the same as that shown in FIG. 1, so a description thereof will be omitted.

A plurality of pressing devices 8 are arranged in a circular manner by connecting pipes 113.
Each pressing device 8 is connected to a brake ring (not shown).
located close to. A pressure supply pipe 14 is connected to one end of the connecting pipe 13.
However, the aE pressure pipes 11 are connected to the pond ends, and the supply pressure pipes 1
4 and the iso pressure pipe 11 are suitable for the oil tank 21 and the lotus. In the middle of the pressure supply pipe 14, there is a high pressure pump 15 and a check valve 16.
, an exhaust pressure pipe 18 having a valve 19, and a valve 17 are attached, and a valve 10 is provided between the valve 17 and the connecting pipe 13.
A brake low-pressure side supply pressure pipe 9 having a diameter is connected thereto.

On the other hand, a valve 12 and a galvanometer plate 20 are attached to the exhaust pressure pipe 11. When controlling the rotating rotor in this configuration, close the valve 12 of the exhaust pressure pipe 11 and the valve 17 of the supply pressure pipe 14, open the valve 10 of the low-pressure brake supply pressure pipe 9, and 4, the brake shoe is pushed up and the rotor is braked.

On the other hand, when used as a jack device, the valve 10 of the brake low pressure side supply pressure pipe 9 and the valve 12 of the BE pressure pipe 11
, by closing the valves 19 of the exhaust pressure pipes 18 and opening the valves 17 of the supply pressure pipe 14 on the high pressure side, the pressure is increased from the oil tank 21 through the high pressure pump 15 and the cylinder 4 of each pressing device 8. Oil is pumped inside.

As the piston 5 rises, the rotor is raised.
After being used as a jack device, open valve 10 of the low pressure side supply pressure pipe 9, valve 12 of the rock pressure pipe 11, valve 19 of the 8E pressure pipe 18, and valve 17 of the supply pressure pipe 14, respectively, and return oil via the low pressure side supply pressure pipe 9. .

Next, the valves 12 of the low-pressure side pressure supply pipe 9 and the exhaust pressure pipe 11 are left open, the valve 17 of the pressure supply pipe 14 is closed, air is sent from the low-pressure side pressure supply pipe 9, and each pressing device 8 is The mechanism is such that the oil in the cylinder 4 is supplied and discharged from the galvanometer plate 20 until the oil no longer flows. As explained above, the present invention connects a brake low-pressure side supply pressure pipe to a high-pressure supply pressure pipe, and connects an 8
After providing a galvanic plate on the E pressure pipe and using it as a jack device, the oil in the cylinder of the pressing device can be completely discharged, and a highly reliable brake/jack device key 2 can be obtained.

[Brief Description of the Drawings] Fig. 1 is a sectional view of a pressing device used in a brake/jack device, Fig. 2 is a pressure E pressure system diagram of a secondary brake/jack device, and Fig. 3 is a brake/jack device according to the present invention. It is a supply and exhaust pressure system diagram of a jack device. 1...Brake ring, 2...Brake shoe, 4...Cylinder, 5...Piston, 6...Pressure port, 7...
- Pseudo pressure port, 8... Pressing device, 9... Low pressure side pressure supply pipe for brake, 10, 17... Valve, 14... High pressure supply pipe, 20... Galvanic plate, 21...・Oil tank. Tsutomu Figure 2 Figure 3

Claims (1)

[Claims] 1. A hydraulic extrusion device having a piston inserted reciprocally into a cylinder and provided with a brake shoe at the tip of the piston is disposed close to a brake ring attached to a rotor, and the above-mentioned A high pressure supply pressure pipe is connected to the supply pressure port side of the cylinder, and a exhaust pressure pipe is connected to the discharge port side of the cylinder, and the high pressure supply pressure pipe and the exhaust pressure pipe are connected to the oil pump,
In a rotary electrode brake jacking device in which a low-pressure brake supply pipe is provided separately from the oil pump and communicates with the cylinder, and the brake shoe is pressed against the brake ring by the hydraulic pressure supplied to the cylinder, A rotating electrode characterized in that a valve is provided, and the low-pressure brake supply pressure pipe provided with the valve is connected between the valve and the hydraulic pressure device, and a galvanic plate is attached in the middle of the exhaust pressure pipe. Brake jacking device.