JPS58566B2 - turbine starting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a manual turbine starter provided as an auxiliary to a powered turning device.

The turbine starter is used when starting the turbine for the first time.

Alternatively, it is a device that helps start the turbine by manually rotating the turbine shaft when the temperature of the lubricating oil in the bearing is low.

1 and 2 show a conventional turbine starting device, in which a shaft coupling flange portion 2 of a shaft 1 of a turbine and a shaft coupling flange portion 4 of a shaft 3 of another turbine or rotating machine are connected to a circular plate 5. It is fastened with a bolt 6 and a nut 7 via.

On the outer periphery of the disk 5. A number of teeth 9 are formed with side surfaces 8 parallel to the axis 1.

Further, the blades 10 disposed on the outer periphery of the disc 5 are of a hydraulic turning device.

A support shaft 12 is rotatably attached to a support base 11 fixed to a bearing base cover 15 in parallel to the shaft 1.

A hole 13 is provided in the center of the support shaft 12 at right angles to the support shaft 12.

A drive lever 14 is inserted into the hole 13.

This lever 14 is manually operated using the support shaft 12 as a fulcrum.
The tip is swung so that it moves from the position indicated by the one-dot chain line in FIG. 2 to the position indicated by the two-dot chain line in FIG. 2, and the tip of the lever 14 pushes up the teeth 9 to rotate the turbine.

In the case of the above-mentioned conventional turbine starter, a disc 5 separate from the rotor is required in order to efficiently machine the teeth with a gear cutting machine such as a hobbing machine, which requires material, processing, and assembly costs. The disadvantage is that it is necessary and overall expensive.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an inexpensive turbine starter.

According to the present invention, the above object is achieved by providing an annular groove on the outer circumferential surface of a shaft coupling flange portion of a turbine, and penetrating the side wall of the annular groove and distributing a plurality of pins in the annular groove in the circumferential direction. This is achieved by a turbine starter, which is provided with a drive lever provided on the outer circumferential side of the shaft joint flange at a position opposite to the pin and swings in a tangential direction of the shaft joint flange to appropriately engage and disengage from the pin.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4.

In the figures, the same reference numerals as in FIGS. 1 and 2 have the same structure and function.

An annular groove 23 is provided on the outer periphery of the shaft coupling flange portion 22 of the shaft 1 .

A number of pins 24 are disposed inside the annular groove 23 and passing through a side wall 25 thereof.

Drive lever 1 similar to that described in FIGS. 1 and 2
Push up the pin 24 with the tip of the pin 24 to rotate the turbine.

In the turbine starter according to the present invention configured as described above, the portion that engages with the drive lever has the annular groove 23.
Since only the and pins 24 are formed directly on the outer circumferential surface of the flange portion, its operation and assembly are simple and inexpensive.

That is, the annular groove can be easily machined using a circular groove, and the hole in which the pin is to be placed can be easily machined using a drill press, the pin itself can be made of an inexpensive steel rod, and there is no need for a special disc as in the past.

[Brief explanation of drawings]

FIG. 1 is a partial vertical cross-sectional view of a conventional turbine starting device, FIG. 2 is a partial cross-sectional view taken along the ■-■ arrow in FIG. 1, and FIG. 3 is an embodiment of the turbine starting device according to the present invention. FIG. 4 is a partial cross-sectional view taken along the line ■-■ in FIG. 3. 1... shaft, 12... support shaft, 14...
... Lever, 22 ... Shaft joint flange part,
23... annular groove. 24... Pin, 25... Side wall of the annular groove.

Claims (1)

[Claims] 1. An annular groove is provided on the outer peripheral surface of the shaft coupling flange portion of the turbine, and a plurality of pins are distributed in the annular groove in the annular groove by passing through the side wall of the annular groove in the axial direction. Set up. A turbine starting device comprising: a drive lever that swings in a tangential direction of the shaft joint flange to engage and disengage the pin as appropriate, at a position facing the pin on the outer peripheral side of the shaft joint flange.