JPH0471657B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention involves forming an annular implantation groove in the rotating shaft and impeller of a centrifugal compressor, and inserting a wire-like base portion of the labyrinth fin into the groove. This invention relates to a new automatic labyrinth fin implantation device that automatically implants together with a filler metal.

[Prior Art] A centrifugal compressor is provided with a plurality of labyrinth fins 3 for labyrinth packings on a rotating shaft 1 and an impeller 2, as shown in FIG. 5, in order to maintain airtightness. As shown in FIG. 6, the labyrinth fin 3 is constructed by inserting a base portion 3a formed in a U-shape in cross section into an annular implantation groove 4 formed in the rotating shaft 1, etc., and then inserting a wire-shaped filler metal 5 into the above-mentioned It is implanted by continuously driving it into the implantation groove 4 along its circumferential direction.

[Problems to be Solved by the Invention] However, conventionally, when embedding the labyrinth fin 3, the rotating shaft 1 is placed on a horse, and while rotating it by hand, the embedding is performed using a chisel and a one-handed hammer. Since the gold 5 was implanted manually, the work was laborious and time consuming, and there was a drawback that the implantation of the filler metal 5 varied. In particular, variations in the implantation of the filler metal 5 cause problems such as vibration and noise of the rotating shaft that rotates at high speed.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to enable continuous and uniform implantation of filler metal while rotating the rotating shaft, and to reduce the working time. An object of the present invention is to provide an automatic lapillary fin implantation device that can shorten the process and reduce labor.

[Structure and operation of the invention] In order to achieve the above object, the present invention forms an annular implantation groove in the rotating shaft and impeller of a centrifugal compressor, and inserts a wire-like base portion of the labyrinth fin into the groove. In an apparatus to be implanted with a filler metal, a support table having a rotational drive source that supports the rotating shaft and rotates the rotating shaft at a predetermined speed;
An automatic driving machine having a filler reel that freely holds the filler metal and a chisel that drives the filler metal into the implantation groove provided on the support base and into which the base of the labyrinth fin is inserted. and a rotation sensor that detects the rotation of the rotary shaft so as to stop the rotary drive source and the automatic driving machine when the rotary shaft makes one revolution.

Therefore, by operating the automatic driving machine while rotating the rotary shaft, the filler metal is driven continuously and uniformly into the implantation groove along its circumferential direction.

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

As shown in FIG. 1, the labyrinth fin automatic implantation device according to the present invention includes a support base 6 that rotatably supports a rotating shaft 1 of a centrifugal compressor. In this embodiment, the support stand 6 is constructed using a lathe. That is, a headstock 9 having a chuck portion 8 is fixed to one end of the bed 7 of the lathe, and a tailstock 11 having a tailstock shaft 10 is fixed to the other end of the bed 7.
2 so that it can freely reciprocate and move opposite the chuck part 8. As shown in FIG. 3, the chuck portion 8 has a pair of gripping pieces 13 for gripping one end of the rotating shaft 1, and these gripping pieces 13 are moved toward and away from each other via a bolt 15 to a bracket 14 fixed to the chuck portion 8. Can be installed freely. The other end of the rotating shaft 1 is supported at its axial center by a tailstock shaft 10 on a tailstock 11.

A motor (brake motor) 16 as a rotational drive source for rotationally driving the chuck portion 8 is attached to the headstock 9, and a rotation sensor 17 for detecting rotation (one rotation) of the chuck portion 8 is also attached.

On the other hand, a carriage 18 is supported on a guide rail 12 between the headstock 9 and the tailstock 11 so as to be able to reciprocate in parallel with the rotating shaft 1. As shown in FIG. 2, a transverse feed motor 20 having a pinion 19 for moving the carriage 18 is attached to the carriage 18, and a pinion 19 is attached to the lower part of the guide rail 12.
A rack 21 with which 9 engages is attached.

Further, a workbench 22 is provided on the carriage 18 so as to be able to reciprocate via rails 23 in a direction perpendicular thereto, and in order to move the workbench 22,
A screw shaft 2 whose one end is connected to a vertical feed motor 24
5 is supported along a rail 23, and a workbench 22 is connected to this screw shaft 25 via a nut 26. As shown in FIG.
With the base 3a of the labyrinth fin 3 inserted inside, a wire-shaped filler metal 5 is inserted into the implantation groove 4.
Automatic driving machine 2 having a chisel 27 for driving
8 is attached with its chisel 27 facing the rotating shaft 1. As shown in FIG. 4, this automatic driving machine 28 consists of a pneumatic pneumatic hammer 29, to which a chisel 27 is removably attached.

All of the motors 16, 20, 24 are DC motors whose rotation speeds can be controlled freely, and these motors 16, 24 are mounted on the carriage 18.
An operation panel 30 for controlling 0 and 24 is attached to the support leg 3
It is attached via 1.

Further, a filler reel 32 holding filler metal 5 in a freely retractable manner is mounted on the carriage 18 via a support arm 33 so as to be positioned above the rotating shaft 1. 34 is the filler 5 fed out from the filler reel 32
This is a twist correction tool for correcting twists in.

Next, the operation of the labyrinth fin automatic implantation device constructed as described above will be explained.

First, one end of the rotating shaft 1 is gripped by the gripping piece 13 of the chuck part 8, and the other end is fixed by the tailstock shaft 10 of the tailstock 11, and a labyrinth fin is cut out one turn at a time in the implantation groove 4. Insert the base 3a of No.3. Next, the horizontal feed motor 20 is activated by the operation panel 30 to move the carriage 18 horizontally, thereby aligning the chisel 27 of the automatic driving machine 28 with the implantation groove 4, and at the same time, the vertical feed motor 24 is activated. Activate the workbench 22
By vertically feeding the chisel 27, the chisel 27 is brought closer to the implantation groove 4.

Next, the filler metal 5 drawn out from the filler reel 32
The distal end of the labyrinth fin 3 is driven into the implantation groove 4 by the operation of the automatic driving machine 28, that is, by continuous striking of the chisel 27 by the pneumatic hammer 29, so as to press down the base 3a of the labyrinth fin 3 and fixed. After that, the automatic driving machine 28 is operated while rotating the rotary shaft 1 at a predetermined speed by the rotation of the motor 16. The filler metal 5 is wound along the circumferential direction of the implantation groove 4 by the rotation of the rotary shaft 1, and is sequentially and continuously driven by the impact by the chisel 27 of the automatic implanter 28. .

Driving of the filler metal 5 is completed when the rotating shaft 1 rotates once, but when the rotation sensor 17 detects that the rotating shaft 1 has rotated once, the operation of the motor 16 and the automatic driving machine 28 is stopped. . Since a brake motor is employed, the rotating shaft 1 will stop immediately, and once the rotating shaft 1 has stopped, the filler metal 5 will be cut. In this way, the labyrinth fin 3 may be implanted in the next implantation groove 4 one after another.

Although a lathe was effectively used in the embodiment, the present invention is not limited thereto.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) The rotary shaft is rotatably supported on a support base, and while being rotated by a rotational drive source, the labyrinth fin is implanted by hitting the filler metal pulled out from the filler reel with the chisel of an automatic driving machine. Since the filler metal is driven into the groove, the filler metal can be driven continuously and uniformly.

(2) Therefore, the working time for installing the labyrinth fin can be shortened, and the labor can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the labyrinth fin automatic implantation device according to the present invention, Fig. 2 is an enlarged view taken along arrow A-A in Fig. 1, and Fig. 3 is a perspective view of the chuck portion of the device. 4 is a perspective view of the automatic driving machine, FIG. 5 is a view showing the rotating shaft of the centrifugal compressor, and FIG. 6 is an enlarged sectional view showing the state of implantation of the labyrinth fin on the rotating shaft. In the figure, 1 is the rotating shaft, 2 is the impeller, 3 is the labyrinth fin, 4 is the implantation groove, 5 is the filler metal, 6 is the support base, 16 is the rotational drive source, 27 is the chisel, and 28 is the automatic It is a driving machine.

Claims (1)

[Claims] 1. An apparatus in which an annular implantation groove is formed in the rotating shaft and impeller of a centrifugal compressor, and the base of the labyrinth fin is implanted in the groove together with a wire-shaped filler, which supports the rotating shaft and supports the rotation. a support base having a rotational drive source that rotates the shaft at a predetermined speed; a filler metal reel supported on the support base and holding the filler metal so that it can be freely fed; a labyrinth fin provided on the support plate; an automatic driving machine having a chisel for driving the filler metal into the implantation groove into which the base has been inserted; A labyrinth fin automatic implantation device characterized by comprising a rotation sensor that detects rotation.