JPS5879786A - Carbonic acid gas laser device - Google Patents

Abstract

PURPOSE:To obtain the carbonic acid gas laser device with a blower motor causing no eccentricity by each mounting impellers at both ends of the shaft of the blower motor and circulating a gas medium. CONSTITUTION:The carbonic acid gas laser device is formed by a discharge tube 1, a gas cooling tube 2 connected to the discharge tube 1 and the blower motor 4, which is connected and mounted to the gas cooling tube and circulates the gas media 3a, 3b into the discharge tube 1 and the gas cooling tube 2. The impellers 8a, 8b are set up at both ends of the shaft 7 of the blower motor 4, and the gas media 3a, 3b are circulated. Accordingly, load is balanced, the eccentricity of the shaft 7 of the blower motor 4 is removed, and th damage of bearings 13 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carbon dioxide laser device, and more particularly to a carbon dioxide laser device having a pro-a-motor for circulating a gas medium.

As is well known, a carbon dioxide laser device includes a laser discharge tube (hereinafter referred to as a discharge tube), a gas cooling tube connected to the discharge tube, and a gas cooling tube connected to the discharge tube. and a pro-a-motor that circulates the gas medium.

This gas cooling pipe generally includes left and right cooling pipes connected to the discharge tube, a central cooling pipe, and a common cooling pipe connecting these left and right cooling pipes and the central cooling pipe. And the impeller is attached to one end of the shaft of the pro motor.
．． One proar motor to which this impeller is attached is installed between the left and right cooling pipes and the common cooling pipe, and circulates the gas medium. That is, the gas medium passing through the left cooling pipe circulates through the promotor with impeller, the common cooling pipe, the central cooling pipe, the discharge tube, and the left cooling pipe, and the gas medium passing through the right cooling pipe circulates through 1. Similarly, it circulates within the blower motor with impeller, common cooling pipe, central cooling pipe, discharge tube, and right cooling pipe.

In the carbon dioxide laser device formed in this way, it is necessary to flow the gas medium in the discharge tube at a high speed of about 100 to 200 m/(8), and this is flowed by a promotor with an impeller. Since the pro-ar motor was only attached to one side of the shaft, the head of the pro-ar motor moved as the impeller rotated at high speed, causing the shaft to become eccentric, putting strain on the bearing, and causing significant damage to the bearing. In addition, although two pro-ar motors are used, it is difficult to make the air volume of each pro-a motor the same, so there is a concern that arc discharge may occur in the discharge tube due to the difference in air volume, and there are also many parts involved. .

The present invention has been made in view of the above points.

The object thereof is to provide a carbon dioxide laser device having a pro-a-motor without eccentricity.

That is, the present invention is characterized in that impellers are provided at both ends of the shaft of the promotor to circulate the gas medium.

The present invention will be explained below based on an embodiment shown in one figure. An embodiment of the invention is shown in FIGS. 1 and 2. FIG. The carbon dioxide laser device is provided with a discharge tube 1, a gas cooling tube 2 connected to the discharge tube 1, and a gas medium 3 in the discharge tube 1 and the gas cooling tube 2.
It is formed from a pro-a-motor 4 that circulates the motors a and 3b.

The discharge tube 1 has opposing electrodes for generating glow discharge, as indicated by the plus + and minus signs in the figure, and the laser light generated by the glow discharge inside the discharge tube 1 is indicated by the dotted line in the figure. As shown in , a reflecting mirror 5, a total reflecting mirror 5a, and an output mirror 5b are provided for reciprocating reflection and taking out a part of the reflected light. A gas medium 3a is placed inside this discharge tube 1.
, 3b, the left and right cooling pipes 2a, 2b are respectively connected near the axial ends of the discharge tube 1.
It is composed of a central cooling pipe 2C provided at the center in the axial direction, and a common cooling pipe 2d that connects these left and right cooling pipes 2a, 2b and the central cooling pipe 2C.
, 2b and the central cooling pipe 2C have a circulating gas medium 3a,
A cooling section 6 is provided for cooling the 3b. In this embodiment, impellers 8a*8b are provided at both ends of the shaft 70 of the pro-ar motor 4 to circulate the gas media 3a and 3b in the laser device configured as described above.

The pro-armotor 4 was provided between the common cooling pipe 2d and the central cooling pipe 2C. In other words, the shaft 70 of the pro motor 4
Insert and attach impellers f3a and gb to both ends, respectively. On the outer periphery of the impellers 8a and 8b after this installation,
Impeller cases ga and gb cover impellers 8a and 8b.
are provided, and the impeller cases 9a, 9b and the pro-armotor 40 case 10 are integrally coupled. Then, the pro motor 4 with the integrated impellers 8a and 8b is
Flange portions 11a of impeller cases 9a and 9b.

11b and flange-connected to the common cooling pipe 2d and the central cooling pipe 2C (not shown in FIG. 2) via IIC, respectively. In the figure, 12 is a stator winding of the pro-ar motor, 13 is a bearing, and 14a and 14b are caps for the impellers 8a and 8b.

According to this configuration, from the common cooling pipe 2d to the impeller 8a,
The gas medium 3 introduced into the pro-armotor 4 via 8b
a and 3b flow from the pro-armotor 4 into the central cooling pipe 2C as shown by solid arrows in the figure, and circulate from the central cooling pipe 2C through the discharge tube 1 and the left and right cooling pipes 2a and 2b. Impellers 9a and 9f are installed at both ends of the shaft 7 of the pro motor 4.
3b, the load is balanced instead of being a cantilever load as in the conventional case, the eccentricity of the shaft 7 of the pro-ar motor 4 is eliminated, and damage to the bearing 13 can be prevented. Then, one promotor 4 serves as a gas medium 3a.

3b circulates, it is possible to prevent the risk of arc discharge occurring due to a difference in the amount of air being blown due to the same amount of air being blown, and it is possible to reduce the number of parts. Also, since the pro motor 4 is provided between the common cooling pipe 2d and the central cooling pipe 2C, the flanges lla, llb, I
Since the IC can be used for installation and removal, it is possible to easily install and remove the pro motor.

As described above, in the present invention, impellers are provided at both ends of the shaft of the pro-armotor to circulate the gas medium, so the load is no longer a cantilever load as in the past, but is now a double-end load, which prevents eccentricity of the shaft. Therefore, a carbon dioxide laser device having a pro-a-motor without eccentricity can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment of the carbon dioxide laser device of the present invention, and FIG. 2 is an enlarged view of the P frame portion of FIG. 1. 1... Laser discharge tube, 2... Gas cooling tube, 2a-,
...Left cooling pipe, 2b...Right cooling pipe, 2C...Central cooling pipe, 2d...Common cooling pipe, 3a, 3b...Gas medium, 4...Pro (1 other person) No. l Figure 2

Claims (1)

[Scope of Claims] 1. A laser discharge tube, a central cooling pipe and left and right cooling pipes communicating with the middle and left and right ends of the laser discharge tube, and a common cooling pipe communicating with one end of the central cooling pipe and the left and right cooling pipes. A gas cooling pipe consisting of a tube, and a proar motor provided in the gas cooling pipe circulates and cools a gas medium between the laser discharge tube and the gas cooling pipe, and an impeller is provided at each end of the shaft of the proarmotor. A carbon dioxide laser device characterized in that a gas medium is circulated through the use of a carbon dioxide laser device. 2. The carbon dioxide laser device according to claim 1, wherein the pro-a-motor is provided between the common cooling pipe and the central cooling pipe.