JPS5835203A - Bucket locking mechanism - Google Patents

Abstract

PURPOSE:To increase reliability in such a way that a headed pin is inserted so as to be respectively engaged with a disc and a locking plate, and the pin itself is provided with its turn-catch, and prevented from being drawn out by caulking the tip of the pin. CONSTITUTION:A hole to pass a turn-catch pin 6 is provided in the radial direction of a disc 2, and a semi-circular pin inserting groove 10 is provided on a locking plate 3. Then, the turn-catch pin 6 is inserted through the inner circumferential side in the radial direction so as to be respectively engaged with the disc 2 and the locking plate 3, its head part is brought into the spot facing side of the disc 2, and further caulking 7 at the tip is done so as not to allow the turn-catch pin 6 itself to be turned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lock plate for a gas turbine packet and a disk, and more particularly to preventing rotation of the lock plate.

In a device having an axial groove for assembling a packet into a disk, if the axial groove is not perpendicular to the end surface of the disk, it is necessary to provide a lock plate roller to prevent the packet from being pulled out.

Conventionally, the rotation of the lock plate was stopped using a rotation stopper screw 4 as shown in Figs. 1, 2, and 3, but the screw strength was insufficient because the plate thickness t of the lock plate 3 was thin. In addition, there is a need to prevent the locking screw 4 from loosening, and there is a risk that the head of the locking screw 4 will be blown off when the centrifugal force 8 is applied, which often causes problems.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and provide a highly reliable packet locking mechanism.

The present invention has a structure in which a headed pin is inserted from the radial direction into the lock plate of the packet and the disc 2 to prevent rotation, and the pin head is brought into contact with the disc, so that even if centrifugal force is applied, no centrifugal force is applied to the pin head. Furthermore, by caulking the tip of the pin, the pin itself is prevented from rotating and being pulled out, thereby achieving the above object.

Next, a third embodiment of the packet lock mechanism, which is an embodiment of the invention, will be described.
Figures 4, 5, 6, and 7.

This will be explained with reference to FIG.

The packet 1 is connected to the disk 2 by multiple dovetails 5, but the gap between the dovetails is quite wide for escape during thermal expansion, assembly, etc., so that it can move freely in the axial direction. It has become. Therefore, the lock plate 3 is required to prevent the packet 1 from being pulled out from the disk 2 in the axial direction. Further, the lock plate 3 requires the rotation stop pin 6 of the present invention so that the lock plate 3 itself does not rotate in the circumferential direction even when the disk 2 and the cut 1 rotate.

The structure of the present invention is that the relocking plate 3 is provided with a hole for passing the anti-rotation pin 6 in the radial direction of the disk 2, and a semicircular butt pin insertion groove 10' (H) is provided as shown in FIGS. 4 and 6.
A non-rotating bottle 6 with a head shown in Fig. 8 was manufactured, and the disc 2
The head of the locking pin 6 is brought into contact with the seating surface of the disk 2, and the tip is caulked 7 to prevent the locking pin 6 itself from turning.

According to the present invention, rotation of the lock plate can be completely prevented, and the rotation of the lock plate with high axial stability can be achieved without causing the rotation stop pin head to be blown off by centrifugal force.

[Brief explanation of drawings]

2 is a front view of the stopper, FIG. 2 is a view taken along the line A-A in FIG. 1, FIG. 3 is an enlarged cross-sectional view taken along B-B in FIG. 1, and FIG. A front view showing an example of a lock plate for preventing rotation of a packet, FIG. 5 is a view taken along the line ρC-C in FIG. FIG. 4 is a view taken along line E-E, and FIG. 8 is a front view showing the shape of the rotation stopper and bottle.

Claims (1)

[Claims] 1. In a device that uses an axial groove provided in the disc to prevent rotation of the lock plate that prevents the packet from being pulled out after assembly, the inner peripheral side in the radial direction is used to engage the disc and the lock plate. A packet lock mechanism characterized by inserting a headed pin and tightening the tip of the pin.