JP2006125316A - Turbo type rotary apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe turbo type rotary apparatus having small outer diameter of a whole rotary apparatus. <P>SOLUTION: A turbo stationary blade SB in a turbo mechanism installed in a housing 1 is constructed in a cylindrical shape concentric with a rotary shaft 3. Namely, 9 in a figure is a cylindrical body forming a base body of the turbo stationary blade SB, and a base part is fixed on the housing 1 although just right half body of a longitudinal section is shown in Figure. The cylindrical body 9 has axial center concentric with an axial center of the rotary shaft 3 and is along the axial center of the rotary shaft 3. Height of the cylindrical body 9 is established corresponding to radius of a conventional turbo stationary blade SB and a stationary blade 10 is formed on an inner circumference surface thereof. The stationary blade 10 is formed by making the cylindrical body 9 thick and machining on an inner circumference thereof or by separately manufacturing a stationary blade piece and pasting the same on the inner circumference. The turbo stationary blade SB is constructed by a such manner and diameter of the whole rotary apparatus is made small. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a turbo rotating device that is useful when, for example, gas is circulated and supplied to a gas laser oscillator device (hereinafter simply referred to as a laser oscillator device).

  In this type of turbo rotating device, a turbo mechanism is arranged in the upper part of the housing to provide a mechanism for compressing and discharging the gas. A motor that is driven to rotate is disposed (see Patent Document 1).

  Such a turbo rotating device is preferably used when supplying gas to a laser oscillator device as an external device. That is, in the case of a flow type carbon dioxide gas laser oscillator device, the gas is compressed while flowing a mixed gas of carbon dioxide gas and other gas, and is supplied to the laser resonator to resonate, and a gas circulation path is configured in the device. Has been. As a blower of one element in the configuration of the circulation path, a turbo rotating device that rotates a turbo rotor blade at high speed to compress gas and supplies the gas to a laser resonator is used (see Patent Document 1).

  A specific configuration of the turbo rotating device GC is as shown in FIG. 5. A turbo rotor blade 2 is rotatably disposed inside the housing 1 and above the turbo rotor blade 2. Is driven at high speed, and both are connected by a rotary shaft 3. The motor 6 includes an electrode coil 6K fixed on the housing 1 side and a rotor 6M fixed to the rotary shaft 3 corresponding to the electrode coil 6K. Energy is supplied.

The rotating shaft 3 is rotatably held with respect to the housing 1 via an upper bearing 4 and a lower bearing (not shown). The turbo rotor blade 2 is fixed to the mounting shaft 3S above the rotating shaft 3. Has been. An upper bearing 4 and a lower bearing (not shown) for holding the motor 6 and the rotating shaft 3 are disposed in the motor chamber M.
When the turbo rotor blade 2 is driven to rotate at a high speed by the motor 6, gas is introduced from the inlet 1K in cooperation with a turbo stator blade (not shown in FIG. 5) disposed on the outer periphery thereof. , Compressed and discharged from the outlet 1H. The gas compression chamber C is formed from the inlet 1K to the outlet 1H.

  For this reason, the gas compression chamber C and the motor chamber M are blocked by the seal portion 7. Specifically, the housing 1 is provided with a through hole having a minimum diameter in a range where the rotary shaft 3 can pass through in a non-contact manner above the upper bearing 4, and a seal portion 7 is formed in cooperation with the rotary shaft 3. ing. For example, a labyrinth seal or the like is applied to the seal portion 7.

  Incidentally, a turbo mechanism that performs a gas compression function is shown in FIG. FIG. 4 shows in more detail a section of only the upper part of the turbo rotating device GC of FIG. 5, but the turbo mechanism is attached to the attachment shaft 3S and is driven to rotate at high speed by the motor 6 shown in FIG. A turbo rotor blade 2 and a turbo stator blade SB (fixed blade) disposed around the outer periphery of the turbo rotor blade 2 are configured in the housing 1 so as to function organically. . The turbo stator blade SB is shown as a block in FIG. 4. Specifically, as is clear from FIG. 3, there are a large number of blade pieces B (19 in the illustrated example) that form the main body of the turbo stator blade SB. 8 is fixed on the upper surface. The blade piece B has a certain thickness, and an annular upper plate is joined to the upper surface of the blade piece B, although not shown, facing each other. In this way, they are arranged side by side with a constant distance (gap) at equal intervals, and gas flows out from each gap to the outer periphery. Each blade B of the turbo vane SB has a fixed inclination angle θ and is fixedly held on the bottom plate.

On the other hand, the turbo rotor blade 2 rotated by a motor (not shown in FIG. 4) also has a large number of blades arranged in parallel around the periphery at a certain angle. Thus, the gas released outward by the rotation of the turbo rotor blade 2 is released to the turbo stator blade SB and compressed to perform a pump function.
JP 2000-22243

In such a conventional turbo rotating device GC, the turbo stationary blade SB is further extended outwardly in the same plane on the outer periphery of the turbo rotor blade 2, which tends to increase in size. Moreover, the turbo rotor blade 2 rotates at a high speed, and when it is broken due to repeated fatigue due to rotation, it is dangerous to receive a large impact as a rotating device. Therefore, the thick part of the housing 1 is provided in preparation for such an accident. Therefore, there is a problem of increasing the size and weight.
The present invention seeks to provide a turbo rotating device that solves such problems.

  In order to solve the above-described problems, a turbo rotating device provided by the present invention comprises a combination of a turbo moving blade that is attached to a rotating shaft and rotates to perform gas compression and a turbo stationary blade that is installed in a fixed state. In the turbo mechanism, the turbo stator blade SB is provided in a state along the axial direction of the rotating shaft. Accordingly, the radial size of the turbo stator blade SB is reduced.

  The turbo rotating device provided by the present invention is reduced in size by reducing the thickness of the rotating device as a whole by reducing the thickness in the radial direction by making the turbo vane upright. In addition, it provides a turbo-type rotating device with high gas compression efficiency, small size and light weight and high performance. Furthermore, the basics of the turbo vane function as a wall that surrounds the surroundings of the turbo rotor blade, and when the turbo rotor blade breaks due to repeated fatigue due to rotation, it absorbs the energy from the scattering and so on, so it is highly safe Provide rotating equipment.

  The turbo rotating device according to the present invention is characterized by a reduction in the outer diameter of the entire rotating device. For this purpose, a turbo rotor blade is provided in a state parallel to the axis of the rotating shaft. The most preferred embodiment of this configuration is to provide a turbo stationary blade on a cylindrical base. Specifically, a cylindrical body having a size surrounding the outer periphery of the turbo rotor blade is disposed concentrically with the rotating shaft, This is an example in which a turbo vane is formed on the inner peripheral surface. This cylindrical base is fixed to the housing. It is also an important requirement that the gas released from the turbo rotor blade be smoothly guided into the cylinder.

The present invention will be described below with reference to the embodiments shown in FIGS.
FIG. 1 is a longitudinal sectional view showing a configuration of a turbo stator blade SB installed in a housing 1, and FIG. 2 shows an enlarged main part thereof. In these drawings, reference numeral 9 denotes a cylindrical body that forms the base of the turbo vane SB. In the drawings, only the right half of the longitudinal section is disclosed, but the base is fixed to the housing 1. The cylindrical body 9 has an axis that is coaxial with the axis of the rotating shaft 3, that is, in a state parallel to the axis of the rotating shaft 3.

  The height of the cylindrical body 9 is set corresponding to the radius of the conventional turbo stator blade SB, and the stator blade 10 is formed on the inner peripheral surface thereof. The stationary blade 10 may be formed by making the cylindrical body 9 thicker by machining or casting on the inner peripheral surface, or by separately manufacturing a stationary blade piece and pasting it on the inner periphery. . In this way, the turbo vane SB is configured.

  When the turbo vane SB is installed, it is desirable that the lower end of the vane 10 is positioned above the horizontal height position at the outer peripheral end of the turbo rotor blade 2 as shown in an enlarged view in FIG. That is, as shown in FIG. 2, the cylindrical body 9 is formed with a curved surface 9C for receiving the gas discharged from the outer peripheral end of the turbo rotor blade 2 and guiding it to the stationary blade 10, so that the gas is smoothly introduced into the turbo stationary blade SB. It has come to be. This is because when the lower end position of the stationary blade 10 is located below the outer peripheral end position of the turbo rotor blade 2, the introduction of the gas is not performed smoothly, leading to overflow and reducing the gas compression efficiency. Because it becomes.

  The features of the present invention are as described in detail above, but the present invention is not limited to the above embodiments and illustrated examples, and includes various modified embodiments. For example, the illustrated example shows an example in which the turbo vanes SB are arranged concentrically, ie, in parallel with the rotary shaft 3. An inclined shape, that is, a conical shape may be used. The point is that the outer periphery of the turbo rotor blade 2 may be covered. As for the configuration of the details, the lower end of the stationary blade 10 of the turbo stationary blade SB is separated from the turbo moving blade 2 by a certain distance, but the lower portion of the stationary blade 10 extends along the curved surface 9C of the cylindrical body 9. The modification extended so that it may adjoin to the outer peripheral end of 2 can be mentioned. In this case, introduction of gas becomes more reliable. Further, as a method for fixing the turbo vane SB to the housing 1, a detachable method by screwing may be employed. In this case, when the turbo vane SB is damaged due to the destruction of the rotating body, the replacement becomes easy.

It is a longitudinal cross-sectional view which shows the structure of the turbo rotating apparatus which this invention provides. It is a longitudinal cross-sectional view which expands and shows the principal part of the turbo rotating apparatus which this invention provides. It is a figure which shows the structure of the turbo stationary blade of the conventional turbo type rotary apparatus. It is a figure which shows the structure of the turbo mechanism of the conventional turbo type rotary apparatus. It is a figure which shows the structure of the conventional turbo rotating apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1H Outlet 1K Inflow port 2 Turbo moving blade 3 Rotating shaft 3S Mounting shaft 4 Upper bearing 5 Inverter 6 Motor 6M Rotor 6K Electrode coil 7 Seal part 8 Annular bottom 9 Cylindrical body 9C Curved surface 10 Stator blade B Blade piece C Gas Compression chamber GC Turbo rotating machine M Motor chamber SB Turbo stationary blade

Claims (2)

  A turbo mechanism composed of a combination of a turbo rotor blade attached to a rotating shaft and driven to rotate for gas compression, and a turbo stator blade disposed outside the turbo rotor blade, and the turbo mechanism arranged inward A housing having an inlet through which gas flows in and an outlet through which compressed gas is discharged, and a motor for rotationally driving the turbo rotor blade, the compressed gas being discharged from the outlet to the outside. A turbo-type rotating device that discharges to a device or the like, wherein a turbo-static blade in the turbo mechanism is provided in a state where a surface of the stationary blade is along the axial direction of the rotating shaft. 2. The turbo rotating device according to claim 1, wherein the turbo stationary blade is provided on an inner surface of a cylindrical body at a peripheral position of the turbo moving blade and coaxial with an axis of the rotating shaft.

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