Rotary drive device, method for mounting a rotary drive device, axial blower, method for mounting an axial blower and laser oscillator

Abstract

Rotary drive device (100, 100A) comprising: a rotating shaft (8); a rotor (1) provided on an outer circumference of the rotating shaft (8); a stator (2) provided on an outer circumference of the rotor (1); a casing (6) receiving the stator (2); a pair of bearings (13, 16) provided accordingly at both ends of the rotating shaft (8) and supporting the rotating shaft (8); a pair of bearing retainers (19, 20) provided accordingly at both ends of the casing (6) and holding the bearings (13, 16); a stator retainer (51) provided on an outer circumference of the stator (2); a cylindrical element (52) provided on an outer circumference of the stator retainer (51); a flange (53) extending from an end of the cylindrical element (52) in an axial direction (D2) to the rotating shaft (8). extends and faces one end of the stator retaining part (51) in the axial direction (D2); and a fastening element (56),which is attached via the flange (53) to the end of the stator retaining part (51) in the axial direction (D2), wherein the flange (53) has a through hole (53a) extending through the flange (53) in the axial direction (D2) and into which the fastening element (56) is inserted, the through hole (53a) having a diameter smaller than that of a head of the fastening element (56) and larger than that of a screw part of the fastening element (56), and in a state in which the screw part of the fastening element (56) is inserted into the through hole (53a), a clearance (53b) is provided between the wall surface of the through hole (53a) and the outer circumference of the screw part of the fastening element (56), and the rotating shaft (8), the rotor (1), the stator (2), the stator retaining part (51) and the cylindrical element (52) in that order in a radial direction (D3) are arranged in the casing (6), and the rotating shaft (8),the rotor (1), the stator (2), the stator retaining part (51) and the cylindrical element (52) are arranged concentrically.

Description

Area

[0001] The present invention relates to a rotary drive device comprising a motor, a method for mounting the rotary drive device, an axial blower, a method for mounting the axial blower and a laser oscillator. background

[0002] Patent literature 1 teaches a method for assembling an electric lathe and a structure thereof, capable of aligning the central axis of a rotor and the central axis of a stator with high precision. The method for assembling the electric lathe taught in patent literature 1 is a method of mounting a housing cover with a rotor to a housing in which the stator is located. The housing cover comprises a cover element, a shaft integrally mounted to the cover element via a flange element, a rotor core provided on the flange element, and a permanent magnet embedded in the rotor core. A flange section is provided on the inside of the cover element.When the housing cover and the housing are assembled with the stator, the flange section is used to measure the magnetic reaction force generated at the cover element in response to the attractive force between the rotor's permanent magnet and the stator core, which is a magnetic element. The flange section is positioned concentrically around the center of the cover element. In the method for assembling the electric lathe, as described in patent literature 1, the housing cover is rotated 360 degrees using the flange section. The eccentricity of the housing cover relative to the housing is measured over the entire circumference of the flange section. The position of the housing cover relative to the housing is adjusted so that the eccentricity becomes uniform over one revolution, and then the housing cover is secured.

[0003] A laser oscillator described in patent literature 2 comprises an oscillator housing in which a laser medium gas is encapsulated. The oscillator housing is equipped with a discharge unit comprising a pair of discharge electrodes used for discharging the laser medium gas, an axial fan for circulating the laser medium gas, and a heat exchanger for cooling the laser medium gas. List of cited documents Patent literature

[0004] Patent literature 1: Japanese patent no. 5742560 Patent literature 2: International publication no. WO 2015 / 093076 Brief description of the technical problem

[0005] In recent years, there have been demands for higher output and smaller size laser oscillators, necessitating increased cooling efficiency for the laser medium gas within these oscillators. One effective way to increase cooling efficiency is to increase the rotational speed of the axial fan that circulates the laser medium gas. However, according to current technology, the bending natural frequency of a rotating element within the axial fan decreases as the rotational speed increases, making it difficult to increase the rotational speed.

[0006] The present invention was developed in light of the above considerations, one purpose of which is to create a rotary drive device capable of rotating at high speeds. Solution to the problem

[0007] To solve the above problem and fulfill a purpose, a rotary drive device according to the present invention comprises: a rotating shaft; a rotor provided on an outer circumference of the rotating shaft; a stator provided on an outer circumference of the rotor; a casing that receives the stator; a pair of bearings provided accordingly at both ends of the rotating shaft and supporting the rotating shaft; a pair of bearing retainers provided accordingly at both ends of the casing and holding the bearings; a stator retainer provided on an outer circumference of the stator; a cylindrical element provided on an outer circumference of the stator retainer; a flange extending from one end of the cylindrical element in an axial direction to the rotating shaft and facing an end of the stator retainer in the axial direction;and a fastening element that is attached to the end of the stator retaining part via the flange in the axial direction, the flange having a through-hole extending axially through the flange into which the fastening element is inserted, the through-hole having a diameter smaller than that of a head of the fastening element and larger than that of a screw part of the fastening element, the rotating shaft, the rotor, the stator, the stator retaining part and the cylindrical element being arranged in that order in a radial direction in the casing, and the rotating shaft, the rotor, the stator, the stator retaining part and the cylindrical element being arranged concentrically. Advantageous effects of the invention

[0008] The rotary drive device according to the present invention produces a rotational effect at high speeds. List of characters Fig. Figure 1 is a perspective view of an axial fan according to a first embodiment. Fig. Figure 2 is a first cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 3 is a second cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 4 is a third cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 5 is a view of the axial blower according to the first embodiment, seen in the axial direction. Fig. Figure 6 is a cross-sectional view of an axial blower according to a second embodiment. Fig. Figure 7 is a perspective view of a laser oscillator according to a third embodiment. Fig. Figure 8 is a cross-sectional view of the laser oscillator according to the third embodiment. Description of embodiments

[0009] In the following, a rotary drive device, a method for mounting the rotary drive device, an axial fan, a method for mounting the axial fan, and a laser oscillator according to embodiments of the present invention are described in detail with reference to the drawings. It should be noted that the present invention is not limited to these embodiments. First embodiment

[0010] Fig. Figure 1 is a perspective view of an axial fan according to a first embodiment. Fig. Figure 2 is a first cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 3 is a second cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 4 is a third cross-sectional view of the axial fan according to the first embodiment. Fig. Figure 5 is a view of the axial fan according to the first embodiment, seen in the axial direction. The central axis is indicated by a reference numeral. AX designated. The central axis AX corresponds to the center in the radial direction of each from a casing 6 , a rotating shaft 8 , a rotor 1 and a stator 2 The circumferential direction around the central axis AX is marked by an arrow D1 denoted. The axial direction, i.e., the direction of extension of the central axis. AX , is indicated by an arrow D2 denoted. The radial direction of the casing. 6 is marked by an arrow D3 denoted. The radial direction D3 is identical to a direction perpendicular to the axial direction D2 . Fig. 2 to Fig. Figure 4 shows the axial fan. 100 seen from different angles in the circumferential direction D1 , where Fig. 2 to Fig. Five perspectives explain an eccentricity adjustment process. A configuration of an axial fan. 100 According to the first embodiment, the following is described with reference to Fig. 1 to Fig. 5 described.

[0011] The axial fan 100 includes the sheathing 6 , which has a cylindrical shape, the rotating shaft 8 , which are in the axial direction D2 extends, an engine 3 , which the rotating shaft 8 drives a rotation, a first stator blade arrangement 5 , a first rotary blade arrangement 11 , a second rotating blade arrangement 12 , a first magnetic thrust bearing 17 , a second magnetic thrust bearing 18 , a first radial magnet bearing component 29 and a second radial magnet bearing part 30 .

[0012] The casing 6is an element made from an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, or an iron alloy, formed into a cylindrical shape. The casing 6 features a large number of through holes 6a , a large number of through holes 6b , a base 6c and a multitude of screw holes 6d on.

[0013] The through holes 6a are cavities that extend from an outer surface to an inner surface through the casing 6 extend. The through holes 6a are along the circumferential direction D1 spaced apart. A screw 60 is in each of the through holes 6a inserted. The leading ends into the through holes. 6a inserted screws 60 protrude from the inner surface of the casing 6in the radial direction D3 inwards and are in scoops 54 screwed. The shovels 54 are components of the first stator blade assembly 5 Details of the first stator blade arrangement 5 will be described later.

[0014] The through holes 6b are cavities that extend from the outer surface to the inner surface through the casing. 6 extend. The through holes 6b are along the circumferential direction D1 spaced apart from each other. An inlet pipe 71 for coolant circulation, an outlet pipe 72 for coolant circulation or a power line 73 Each of the through holes of a stator coil 6b inserted. The preceding ends in the radial direction. D3 of the inlet pipe 71 and the outlet pipe 72 reach a stator holding part 51 , as this in Fig. 4 is shown.

[0015] The base 6c is located outside the casing 6 The base 6c can be die-cast in one piece with the casing 6 be formed using the same material as the casing 6 is used, or it can be formed by die casting, using the same material as that of the casing. 6 is used, and then attached to the sheathing 6 to be welded. The base 6c is a mounting element for attaching the axial blower 100 on the housing of a laser oscillator, which will be described later. The shape of the base 6c is not limited to a plate shape, as long as the base 6c the axial fan 100 attached to the housing of the laser oscillator.

[0016] The screw holes 6d are holes located at both ends of the casing 6are formed. The screw holes 6d are along the circumferential direction D1 spaced apart. Screws 61 are in the screw holes 6d inserted. The screws 61 These are fastening elements for attaching a first bearing support part. 19 and a second storage part 20 on the casing 6 Details of the structures of the first storage section 19 and the second storage part 20 will be described later.

[0017] The rotating shaft 8 is an element made from an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, or an iron alloy, formed into a column shape. The rotating shaft 8 is an output wave that extends along the central axis AX extends.

[0018] The engine 3 , which the rotating shaft 8what drives the rotating shaft is an electric lathe. 8 is driven to a specific speed by a driver (not shown) with specific output power. In the case of the motor... 3 It could be either an induction motor or a permanent magnet motor. The motor 3 includes the stator 2 , which is inside the casing 6 is arranged, and the rotor 1 , which is inside the stator 2 and along the outer circumference of the rotating shaft 8 is arranged.

[0019] The stator 2 is the outer surface of the rotor 1 in the radial direction D3 facing the stator 2 is concentric around the central axis AX placed. The stator 2 It includes a stator core, which is a cylindrical magnetic element, and a stator winding. The rotor1 is located in the middle in the axial direction D2 the rotating shaft 8 in an area within the stator 2 The rotor 1 is concentric around the central axis AX placed. The rotor 1 is a cylindrical magnetic element. The rotating shaft 8 is provided by a first radial magnetic bearing 13 and a second radial magnetic bearing 16 mounted so that the rotor 1 through the sheathing 6 is mounted. The rotation of the rotor 1 displaces the rotating shaft 8 in rotation. Although the rotor 1 in the present embodiment in the outer circumference of the rotating shaft 8 Once fitted, the rotating shaft can 8 into the rotor 1 be embedded.

[0020] The first stator blade arrangement 5 includes a shovel base part 52, which is a cylindrical element, a flange 53 and the shovels 54 Examples of materials for the shovel base part 52 , the flange 53 and the shovels 54 They include an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, and an iron alloy.

[0021] The shovel base part 52 is a cylindrical element that extends in the axial direction D2 extends. The shovel base part 52 is concentric around the central axis AX placed. The shovel base part 52 is located outside the stator mounting part 51 at a distance from the outer circumference of the stator retaining part 51 The stator holding part 51 is a cylindrical element that extends in the axial direction D2 extends. The stator holding part 51 is concentric around the central axis AX placed. The stator holding part 51 is intended to extend the outer circumference of the stator 2 to cover the stator mounting part 51 has a groove 51d , which includes a coolant channel for cooling the engine 3 is, O-rings 51b , each of which is a sealing element, and annular grooves 51c on, into which the O-rings 51b are inserted accordingly. The O-rings 51b are in the ring-shaped grooves 51c of the stator holding part 51 inserted, a ring-shaped sealing cover 55 , which prevents the coolant from leaking out, is thus integrated into the outer circumference of the stator mounting part. 51 fitted so that the cover 55 the O-rings 51b compresses. The one in the stator holding part 51 fitted cover 55 is secured by screwing it to the stator mounting part 51 attached. The cover 55features through holes extending in the radial direction D3 extend. As in Fig. Figure 4 shows the leading ends of the inlet pipe. 71 and the outlet pipe 72 The through-holes are connected accordingly. In this way, the inlet pipe communicates. 71 and the outlet pipe 72 with the groove 51d of the stator holding part 51 .

[0022] A variety of shovels 54 is along the outer circumference of the shovel base part 52 mounted. The shovels 54 can be die-cast in one piece with the shovel base part 52 be formed from the same material as that of the shovel base part 52 is used, or they can be formed by die casting, using the same material as that of the shovel base part. 52 is used, and then attached to the shovel base part 52to be welded. The shovels 54 are along the circumferential direction D1 spaced apart from each other. The outer end in the radial direction. D3 from each of the shovels 54 is in contact with the inside of the casing 6 .

[0023] The flange 53 is at one end in the axial direction D2 of the shovel base part 52 provided. The flange 53 can be die-cast in one piece with the shovel base part 52 be formed from the same material as that of the shovel base part 52 is used, or it can be formed by die casting, using the same material as that of the shovel base part. 52 is used, and then attached to the shovel base part 52 to be welded. The flange 53 is a ring-shaped element that extends from the end in the axial direction D2 of the shovel base part 52, which is a cylindrical element, to the rotating shaft 8 extends. The flange 53 is at the end in the axial direction D2 of the stator holding part 51 facing the flange 53 has an inner diameter that is smaller than the outer diameter of the stator mounting part 51 and is larger than the outer diameter of the stator winding. The inner circumference of the flange 53 is not in contact with the stator winding. Fig. 4 is the inner diameter of the flange. 53 essentially equal to the inner diameter of the stator mounting part 51 .

[0024] As in Fig. As shown in 4, the flange 53 Through holes 53a open. Each of the through holes 53a is a hole into which a fastening element 56 to adjust the eccentricity of the motor 3 is inserted. The through-hole 53aextends in the axial direction D2 through the flange 53 The through hole 53a has a diameter smaller than the head of the fastener 56 and larger than a screw part of the fastener 56 It should be noted that the screw part of the fastener... 56 has an external thread structure that fits into a hole 51a It can be screwed into the stator mounting part. 51 is formed. An example of the fastening element 56 is a bolt. In a state where the screw part of the fastener 56 into the through hole 53a The inserted game is a game 53b between the wall surface of the through hole 53a and the outer circumference of the screw part of the fastener 56 planned. The game 53b It allows the position of the stator to be determined 2during the eccentricity adjustment process, which will be described later, in the radial direction D3 to postpone.

[0025] The in Fig. 1 of the screws shown 60 are put into the shovels 54 the first stator blade arrangement 5 screwed so that the first stator blade assembly 5 on the casing 6 is attached. This secures the element within the first stator blade assembly. 5 located stator 2 indirectly on the casing 6 fastened. Specifically, the stator mounting part is attached. 51 in the outer circumference of the stator 2 fitted, the stator holding part 51 is attached to the flange 53 to the inside of the shovel base part 52 adapted, thereby the stator 2 on the casing 6 is attached.

[0026] As in Fig. As shown in section 4, the part attached to the casing serves as a guide.6 fixed first stator blade assembly 5 also as part 7 for adjusting the eccentricity of the motor 3 The eccentricity adjustment part 7 is caused by the part in the stator holding part 51 formed hole 51a , the fastening element 56 and the through hole 53a A threaded hole is formed on the outer wall. 51a formed. During the process of adjusting the engine's eccentricity. 3 , which will be described later, the ends of the stator holding part will be 51 and the flange 53 caused to come into contact with each other in the axial direction, and the position of the central axis AX of the stator 2 in the radial direction D3 is over the casing 6 based on the central axis AX of the rotor 1 set as a reference. Then the fastener is 56in the hole 51a attached to the end face of the stator mounting part 51 is formed. Details of the process of adjusting the engine's eccentricity. 3 will be described later.

[0027] The first rotary blade arrangement 11 is located between the first stator blade assembly 5 and the first storage part 19 The first rotary blade arrangement 11 includes a backplate part 11a , a cylindrical part 11b and a multitude of leaves 11c Examples of materials for the first rotating blade arrangement 11 , the cylindrical part 11b and the leaves 11c They include an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, and an iron alloy.

[0028] The backplate part 11ais a disc-shaped element that is attached to a holding part for the first rotary blade assembly 9 is attached. The backplate part 11a features a large number of through holes 11a1 on, which are in the axial direction D2 extend. The through holes 11a1 are along the circumferential direction D1 spaced apart. Rotary blade mounting screws 14 are in the through holes 11a1 inserted. The backplate part 11a points in the middle in the radial direction D3 a rotary blade holding hole 11a2 on.

[0029] The holding part for the first rotary blade assembly 9 is a ring-shaped element located between the rotor 1 and the first storage part 19 is located. Examples of the material of the retaining part for the first rotary blade assembly. 9They include an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, and an iron alloy. The holding part for the first rotary blade assembly. 9 is located on the outer circumference of the rotating shaft 8 and is on the rotating shaft 8 attached.

[0030] The holding part for the first rotary blade assembly 9 includes a first ring-shaped section 9a and a second ring-shaped section 9b , which relates to the first ring-shaped section 9a on the side of the first bearing part 19 is located. The first ring-shaped section 9a It has an outer diameter that is smaller than the inner diameter of the stator winding. The first annular section 9a points in the middle in the radial direction D3 a through hole. The through hole is a hole through which the rotating shaft passes. 8extends. The first ring-shaped section 9a also has through holes 9a1 into which the rotary blade mounting screws 14 to attach the first rotating blade assembly 11 are inserted. The through holes 9a1 are located at outer positions in the radial direction D3 of the holding part for the first rotary blade arrangement 9 formed and along the circumferential direction D1 spaced apart from each other. The second ring-shaped section 9b has a diameter that is smaller than that of the first ring-shaped section 9a is. The inner surface of the rotary blade retaining hole 11a2 of the backplate part 11a is in contact with the outer surface of the second ring-shaped section 9b The rotary blade mounting screws 14 are in a state in which the inner surface of the rotary blade retaining hole 11a2 in contact with the outer surface of the second ring-shaped section9b is, into the through holes 11a1 of the backplate part 11a and the through holes 9a1 of the first ring-shaped section 9a screwed. This secures the backplate part. 11a on the holding part for the first rotary blade arrangement 9 attached.

[0031] The cylindrical part 11b is a cylindrical element located on the outside of the backplate part 11a in the radial direction D3 is arranged and extends from the backplate part 11a to the first stator blade arrangement 5 extends. The leaves 11c are on the outside of the cylindrical part 11b in the radial direction D3 arranged and extending from the cylindrical part 11b to the inner surface of the casing 6 The leaves 11c are along the circumferential direction D1 spaced apart from each other.

[0032] The second rotary blade arrangement 12 is located between the first stator blade assembly 5 and the second storage part 20 The second rotary blade arrangement 12 includes a backplate part 12a , a cylindrical part 12b and a multitude of leaves 12c Examples of materials for the second rotating blade arrangement 12 , the cylindrical part 12b and the leaves 12c They include an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, and an iron alloy.

[0033] The backplate part 12a is a disc-shaped element that is attached to a holding part for the second rotary blade arrangement 10 is attached. The backplate part 12a features a large number of through holes 12a1 on, which are in the axial direction D2 extend. The through holes 12a1are along the circumferential direction D1 spaced apart. Rotary blade mounting screws 15 are in the through holes 12a1 inserted. The backplate part 12a points in the middle in the radial direction D3 a rotary blade holding hole 12a2 on.

[0034] The holding part for the second rotary blade assembly 10 is a ring-shaped element located between the rotor 1 and the second storage part 20 is located. Examples of the material of the retaining part for the second rotary blade arrangement. 10 They include an aluminum alloy, an austenitic stainless steel alloy, a copper alloy, cast iron, steel, and an iron alloy. The retaining part for the second rotary blade assembly. 10 is located on the outer circumference of the rotating shaft 8 and is on the rotating shaft 8 attached.

[0035] The holding part for the second rotary blade assembly 10 includes a first ring-shaped section 10a and a second ring-shaped section 10b , which is located on the side of the second bearing part 20 is located. The first ring-shaped section 10a It has an outer diameter that is smaller than the inner diameter of the stator winding. The first annular section 10a points in the middle in the radial direction D3 a through hole. The through hole is a hole through which the rotating shaft passes. 8 extends. The first ring-shaped section 10a also features screw through holes 10a1 on, into which the rotary blade mounting screws 15 to attach the second rotating blade assembly 12 are inserted. The screw holes 10a1 are located at outer positions in the radial direction D3of the holding part for the second rotary blade arrangement 10 formed and along the circumferential direction D1 spaced apart from each other. The second ring-shaped section 10b has a diameter that is smaller than that of the first ring-shaped section 10a is. The inner surface of the rotary blade retaining hole 12a2 of the backplate part 12a is in contact with the outer surface of the second ring-shaped section 10b The rotary blade mounting screws 15 are in a state in which the inner surface of the rotary blade retaining hole 12a2 in contact with the outer surface of the second ring-shaped section 10b is, into the through holes 12a1 of the backplate part 12a and into the screw holes 10a1 of the first ring-shaped section 10a screwed. This secures the backplate part. 12a on the holding part for the second rotary blade arrangement 10 attached.

[0036] The cylindrical part 12b is a cylindrical element located on the outside of the backplate part 12a in the radial direction D3 is arranged and extends from the backplate part 12a to the first stator blade arrangement 5 extends. The leaves 12c are on the outside of the cylindrical part 12b in the radial direction D3 arranged and extending from the cylindrical part 12b to the inner surface of the casing 6 The leaves 12c are along the circumferential direction D1 spaced apart from each other.

[0037] The first magnetic thrust bearing 17 is a magnetic bearing that is located in the first radial magnetic bearing part 29 is included and a load in the thrust direction of the rotary shaft 8 absorbs. The first magnetic thrust bearing 17 includes a turned part 17a and a fixed part17b The turned part 17a is located on the first rotating blade arrangement 11 opposite side in relation to the first radial magnet bearing 13 The turned part 17a is on the rotating shaft 8 It is mounted and rotates with the rotating shaft. 8 The position of the rotating part 17a is located near the end of the rotating shaft 8 , which is from the first bearing part 19 protrudes. The fixed part 17b is at the end of the first radial magnetic bearing 13 in the axial direction D2 attached and is attached to the rotating part 17a in the axial direction D2 Facing the direction. Metal is used as the material for the turned part. 17a used, and an electromagnet is used for the stationary part. 17b used.

[0038] The second magnetic thrust bearing 18 is a magnetic bearing that is attached to the second radial magnetic bearing part 30is mounted and a load in the thrust direction of the rotary shaft 8 absorbs. The second magnetic thrust bearing 18 includes a turned part 18a and a fixed part 18b The turned part 18a is located at the second rotating blade arrangement 12 opposite side in relation to the second radial magnet bearing 16 The turned part 18a is on the rotating shaft 8 It is mounted and rotates with the rotating shaft. 8 The position of the rotating part 18a is located near the end of the rotating shaft 8 , which is from the second bearing part 20 protrudes. The fixed part 18b is at the end of the second radial magnetic bearing 16 in the axial direction D2 attached and is attached to the rotating part 18a in the axial direction D2 Facing the direction. Metal is used as the material for the turned part. 18aused, and an electromagnet is used for the stationary part. 18b used.

[0039] It should be noted that the first magnetic thrust bearing 17 and the second magnetic thrust bearing 18 at the ends of the rotating shaft 8 may be provided for or at one end of the rotating shaft 8 may be provided for.

[0040] The first radial magnet bearing component 29 includes the first storage part 19 , which is located at one end of the casing 6 in the axial direction D2 is located, and the first radial magnetic bearing 13 , which is located on the inside of the first bearing support part 19 is located.

[0041] The first storage part 19 includes a cylindrical part 19a and a variety of support beam components 19b The cylindrical part 19ahas an outer diameter that is smaller than the outer diameter of the blade base part 52 the first stator blade arrangement 5 and smaller than the outer diameter of the cylindrical part 11b the first rotary blade arrangement 11 is and does not block the flow passage for the laser medium gas.

[0042] As in Fig. As shown in section 4, the cylindrical part 19a a through hole 19c open. The through hole 19c is a hole that extends in the axial direction D2 through the cylindrical part 19a extends. The through hole 19c It has a diameter larger than that of a fastening tool (not shown). The fastening tool is a tool for fastening the fastener. 56 in the hole 51a of the stator holding part 51Specifically, the fastening tool is a tool used to fasten the flange. 53 with the fastening element 56 on the stator holding part 51 to attach.

[0043] As in Fig. As shown in Figure 2, the support beam sections extend 19b starting from the outer circumference of the cylindrical part 19a in the radial direction D3 The support beam sections 19b They are located in the flow passage for the laser medium gas and are therefore designed in a beam-like shape to avoid obstructing the flow of the laser medium gas. As shown in Fig. The support beam parts are shown in 1. 19b in the circumferential direction D1 spaced apart from each other and arranged at intervals with a mechanical angle of 90°.

[0044] As in Fig. As shown in section 5, the support beam sections 19b screw holes on sections near their ends19b1 , which are in the axial direction D2 extend through them, and pinholes 19b2 open. The screw holes 19b1 are through holes into which the screws 61 for attaching the support beam parts 19b on the casing 6 are inserted. The pinholes 19b2 These are positioning holes into which pins are inserted. 47 , which are attached to the casing 6 are provided, fitted. The pin holes 19b2 are along the radial direction D3 formed, in which the body's own weight acts. Specifically, a pinhole. 19b2 in each of two support beam sections 19b formed, with it extending in the vertical direction of the cylindrical part 19a extends. The pens 47 have a shape that extends from an end face of the casing 6 in the axial direction D2 extends. The pens 47are along the radial direction D3 designed in which the body's own weight acts. Specifically, the pins 47 provided in two positions, namely an upper position and a lower position on the front surface of the casing. 6 It concerns the second storage part. 20 It also exhibits structures that correspond to the screw holes. 19b1 and the pinholes 19b2 are similar.

[0045] The screws 61 are in a state in which the coating 6 provided pens 47 into the pin holes 19b2 are fitted and the support beam parts 19b in contact with the end face of the casing 6 are, into the screw holes 6d the casing 6 and the screw holes 19b1 the support beam parts 19b inserted. This makes the support beam sections 19bon the casing 6 attached. The use of the pins 47 for attaching the bearing retainers to the casing 6 This allows the bearing components to be moved with high precision in the radial direction. D3 , in which the self-weight of the rotating body acts on the casing 6 be positioned and attached.

[0046] The first radial magnetic bearing 13 includes a turned part 13a and a fixed part 13b The turned part 13a is a cylindrical element attached to the rotating shaft 8 is mounted and aligns with the rotating shaft 8 rotates. The position of the rotating part 13a is an area near the first rotating blade arrangement 11 in an area on the inside of the cylindrical part 19a of the first storage part 19 The fixed part 13b is located between the rotating part 13aand the cylindrical part 19a The fixed part 13b is on the inside of the cylindrical part 19a attached and the rotating part 13a in the radial direction D3 Facing the direction. Metal is used as the material for the turned part. 13a used, and an electromagnet is used for the stationary part. 13b used.

[0047] The second radial magnet bearing part 30 includes the second bearing holder part 20 , which is located at the other end of the casing 6 in the axial direction D2 is located, and the second radial magnetic bearing 16 , which is located on the inside of the second bearing holder part 20 is located.

[0048] The second bearing part 20 includes a cylindrical part 20a and a variety of support beam components 20b The cylindrical part 20ahas an outer diameter that is smaller than the outer diameter of the blade base part 52 the first stator blade arrangement 5 and smaller than the outer diameter of the cylindrical part 12b the second rotating blade arrangement 12 is and does not block the flow of the laser medium gas.

[0049] The support beam parts 20b extend from the outer circumference of the cylindrical part 20a in the radial direction D3 The support beam sections 20b They are located in the flow passage for the laser medium gas and are therefore designed in a beam-like shape to avoid obstructing the flow of the laser medium gas. As shown in Fig. The support beam parts are shown in 1. 20b in the circumferential direction D1 spaced apart from each other and arranged at intervals with a mechanical angle of 90°.

[0050] The second radial magnetic bearing 16 includes a turned part 16a and a fixed part 16b The turned part 16a is a cylindrical element attached to the rotating shaft 8 is mounted and aligns with the rotating shaft 8 rotates. The position of the rotating part 16a lies in an area near the second rotating blade arrangement 12 in an area on the inside of the cylindrical part 20a of the second storage part 20 The fixed part 16b is located between the rotating part 16a and the cylindrical part 20a The fixed part 16b is on the inside of the cylindrical part 20a attached and is attached to the rotating part 16a in the radial direction D3 Facing the direction. Metal is used as the material for the turned part. 16a used, and an electromagnet is used for the stationary part. 16b used.

[0051] Regarding the axial fan 100 The rotor is formed by the structure described above. 1 , the stator 2 , the stator holding part 51 , the shovel base part 52 and the shovels 54 in this order from the central axis AX to the inner surface of the casing 6 arranged.

[0052] Next, a method for attaching the first rotary blade assembly will be described. 11 on the holding part for the first rotary blade arrangement 9 described. The rotary blade holding hole 11a2 of the backplate part 11a is attached to the second ring-shaped section 9b of the holding part for the first rotary blade arrangement 9 adjusted. Subsequently, in a state where the backplate part 11a the first rotary blade arrangement 11 is caused to begin with the first ring-shaped section 9a of the holding part for the first rotary blade arrangement 9to be in contact, the rotary blade mounting screws 14 into the holding part for the first rotary blade assembly 9 screwed. In this way, the first rotary blade assembly is formed. 11 on the holding part for the first rotary blade arrangement 9 fastened. A method for fastening the second rotary blade assembly. 12 on the holding part for the second rotary blade arrangement 10 is similar to the one above.

[0053] Regarding the axial fan 100 The structure described above forms the rotating shaft 8 , the rotor 1 , the holding part for the first rotary blade arrangement 9 , the holding part for the second rotary blade arrangement 10 , the first rotary blade arrangement 11 , the second rotating blade arrangement 12 , the turned part 13a and the rotating part 16a a rotating body. The first rotating blade arrangement 11functions as a rotary blade arrangement on the laser medium gas intake side, and the second rotary blade arrangement 12 It functions as a rotating blade assembly at the laser medium gas outlet side. The rotating body rotates by receiving the rotary drive force from the motor. 3 of the axial fan 100 The rotation of the rotary blade assemblies mounted on the rotating body blows the laser medium gas. During this process, a pressure difference is created in the laser medium gas between the intake side and the outlet side of the axial blower. 100 This generates a pressure force along the central axis. AX the rotating shaft 8 acts on the rotating body. The first magnetic thrust bearing 17 It is used to prevent positional displacements of the rotating body caused by the pressure force. Specifically, the first magnetic thrust bearing supports 17 the rotating shaft 8 in the axial direction D2It should be noted that a sensor (not shown) for detecting the position of the magnetic thrust bearing is preferably located on the first radial magnetic bearing. 13 is intended to improve the precision of the positioning of the first magnetic thrust bearing. 17 to increase. While in the axial fan 100 according to the first embodiment, the first magnetic thrust bearing 17 and the second magnetic thrust bearing 18 To be used, it is possible to install a magnetic thrust bearing at one of the two ends of the rotating shaft. 8instead of using two magnetic thrust bearings. In a case where such a magnetic thrust bearing is used, stationary parts contained within the magnetic thrust bearing are provided on both sides of a rotating part contained within the magnetic thrust bearing. Specifically, two stationary parts and one rotating part forming the magnetic thrust bearing are arranged in the following order in the axial direction. D2 Arranged as follows: stationary part, rotating part and stationary part.

[0054] It should be noted that the components in the axial fan are... 100 The magnetic bearings used can be any type of active magnetic bearing, passive magnetic bearing, or hybrid magnetic bearing, which includes an electromagnet and a permanent magnet. The sensor (not shown) for detecting the position of the magnetic thrust bearing can be either a capacitive (inductive) sensor or an eddy current sensor. <Verfahrensweisen zum Zusammenbauen des Axialgebläses 100 (Betrieb)>

[0055] Now, procedures for assembling the axial blower will be described. 100 described. First, the first radial magnetic bearing is described. 13 at the first storage part 19 The second radial magnetic bearing is attached in a similar way. 16 on the second bearing part 20 attached. Once the stator 2 , on which the stator holding part 51 is attached, and the sheathing 6 , where the first stator blade assembly 5 Once everything is attached and prepared, the process of temporarily positioning the central axis will then begin. AX of the stator 2 on the casing 6 This is carried out. For temporary positioning, the end of the stator retaining part is used. 51 in contact with the flange 53 of the shovel base part 52brought, and the fastening element 56 gets loose in the hole 51a of the stator holding part 51 fastened. “Fasten loosely” means that the stator 2 relative to the casing 6 is maintained to such an extent that the stator 2 can be moved for adjustment. Since the through-hole 53a with the game 53b , which is a margin for eccentricity adjustment, in the first stator blade arrangement 5 Once formed, the central axis can AX of the stator 2 in the radial direction D3 of the stator 2 to be moved. After the temporary positioning is complete, an eccentricity adjustment process is performed to set the position of the center axis. AX of the stator 2 in the radial direction D3 on the central axis AX of the rotor 1 about the casing 6carried out by the in Fig. 3 and Fig. 5 centering adjustment template shown 45 is used.

[0056] During the eccentricity adjustment process, the centering adjustment template is used. 45 used. In Fig. 3 and Fig. 4 are the components of the centering adjustment template used in the eccentricity adjustment process. 45 depicted. Fig. Figure 5 shows the front of the axial fan. 100 during the eccentricity adjustment process. For example, the centering adjustment template includes 45 a template wave 39 , a multitude of balls for adjusting the axial center of the stator 40 , which run along the circumferential direction D1 on the outer circumference of the template shaft 39 are arranged, and a holding part for the balls for adjusting the axial center of the stator. 41 The centering adjustment template45 It also includes a variety of elements for adjusting the axial center of the stator. 42 , a cylindrical stencil cover 43 , a rotation stop element 44 , a resin strip 42a and the fastening element 56 .

[0057] The template wave 39 is a blind shaft, which is like the rotating shaft 8 is shaped and has an inclined section 39a and an external thread for adjusting the axial center of the stator 39b is formed. The inclined section 39a is on a middle section of the template wave 39 in the axial direction D2 formed. The outer surface of the inclined section 39a is tapered, with an outer diameter increasing from one side to the other in the axial direction D2 decreases. The external thread for adjusting the axial center of the stator. 39bis a screw thread located on the outer circumference of the template shaft 39 is educated.

[0058] The balls for adjusting the axial center of the stator 40 are spherical bodies that are in contact with the outer circumference of the template shaft 39 in the circumferential direction D1 are arranged. The retaining part for the balls is used to adjust the axial center of the stator. 41 It has a cylindrical shape. The retaining part for the balls is used to adjust the axial center of the stator. 41 It features retaining grooves for the balls to adjust the axial center of the stator. 41a , which use the balls to adjust the axial center of the stator 40 hold, and an internal thread for adjusting the axial center of the stator 41b The retaining grooves for the balls are designed to adjust the axial center of the stator. 41aare located in a central section of the holding part for the balls for adjusting the axial center of the stator 41 in the axial direction D2 formed. The retaining grooves for the balls for setting the axial center of the stator. 41a are holes that run in the circumferential direction D1 of the holding part for the balls for adjusting the axial center of the stator 41 are spaced apart from each other. The retaining grooves for the balls are used to adjust the axial center of the stator. 41a are holes that extend in the radial direction D3 through the retaining part for the balls for adjusting the axial center of the stator 41 extend, and point in a top view of the retaining part for the balls for adjusting the axial center of the stator 41 in the radial direction D3 a round shape. The retaining grooves for the balls are used to adjust the axial center of the stator. 41aare formed at positions that correspond to the inner circumference of the stator 2 are facing each other. The internal thread is for adjusting the axial center of the stator. 41b is an internal thread into which the external thread for adjusting the axial center of the stator is inserted. 39b is fitted.

[0059] The elements for adjusting the axial center of the stator 42 are plate-shaped elements that fit into grooves for the elements used to adjust the axial center of the stator 43a the stencil cover 43 are provided. The stencil cover 43 It has a cylindrical shape, which forms the outer surface of the retaining part for the balls for adjusting the axial center of the stator. 41 covered. The grooves for the elements for adjusting the axial center of the stator. 43a are holes that are in the stencil cover 43 are formed to provide the elements for adjusting the axial center of the stator 42to hold. The grooves for the elements for adjusting the axial center of the stator. 43a are along the circumferential direction D1 the stencil cover 43 spaced apart from each other. The shape of the wall surfaces, which contain the grooves for the elements used to adjust the axial center of the stator. 43a forming is the same as that of the elements for setting the axial center of the stator. 42 In particular, a top view of the elements for adjusting the axial center of the stator shows 42 in the radial direction D3 the elements for adjusting the axial center of the stator 42 a square contour, and in a top view of the slots for the elements for adjusting the axial center of the stator 43a in the radial direction D3 The wall surfaces have grooves for the elements used to adjust the axial center of the stator. 43aThey form a square contour. The grooves for the elements for adjusting the axial center of the stator. 43a are located in a middle section of the stencil cover 43 in the axial direction D2 formed. The grooves for the elements for adjusting the axial center of the stator. 43a are formed at positions that correspond to the inner circumference of the stator 2 are facing each other. The elements for adjusting the axial center of the stator. 42 are through the resin strip 42a in the grooves for the elements for adjusting the axial center of the stator 43a the stencil cover 43 held. The resin strip 42a is a resin-based element with a ring-shaped form.

[0060] The rotation stop element 44 is an element that forms the holding part for the balls for adjusting the axial center of the stator 41 prevents it from rotating. The rotation stop element44 includes a stopper element 44a and a support beam section 44b , which is the stopper element 44a supports. The stopper element 44a is located near the outer end of the support beam section 44b in the radial direction D3 The stopper element 44a is located between the support beam section 44b and a support beam section 19b One end of the stopper element 44a in the axial direction D2 is in contact with the support beam part 19b The support beam section 44b is at the end of the holding part for the balls for adjusting the axial center of the stator 41 in the axial direction D2 attached. As in Fig. Figure 3 shows the outer end of the support beam section. 44b in the radial direction D3 at a position away from the inner surface of the casing 6 .

[0061] Next, procedures for assembling the centering adjustment template will be described. 45 described. The outer circumference of the template shaft. 39 is attached to the inner circumference of the retaining part for the balls to adjust the axial center of the stator. 41 adapted. Part of the external thread for adjusting the axial center of the stator. 39b the template wave 39 , which is formed at one end of the fitting section, is inserted into the internal thread to adjust the axial center of the stator 41b of the holding part for the balls for adjusting the axial center of the stator 41 screwed so that the retaining part for the balls is used to adjust the axial center of the stator 41 on the template wave 39 is attached. The retaining grooves for the balls are used to adjust the axial center of the stator. 41a of the holding part for the balls for adjusting the axial center of the stator 41are located on the outer perimeter of the inclined section 39a the template wave 39 educated.

[0062] The outer circumference of the retaining part for the balls for adjusting the axial center of the stator 41 is attached to the inner circumference of the stencil cover 43 adjusted. The position of the stencil cover 43 in the circumferential direction D1 is adjusted in such a way that the slots for the elements for adjusting the axial center of the stator 43a the stencil cover 43 outside the retaining grooves for the balls for adjusting the axial center of the stator 41a of the holding part for the balls for adjusting the axial center of the stator 41 are formed. After the balls are used to adjust the axial center of the stator. 40 correspondingly in the retaining grooves for the balls to adjust the axial center of the stator 41awere housed in the holding part for the balls for adjusting the axial center of the stator 41 Once formed, the elements are used to adjust the axial center of the stator. 42 correspondingly in the grooves for the elements for adjusting the axial center of the stator 43a housed in the stencil cover 43 are formed. Furthermore, the resin strip is 42a at the outer ends of the elements for adjusting the axial center of the stator 42 provided in the radial direction, so that the balls are used to adjust the axial center of the stator 40 and the elements for adjusting the axial center of the stator 42 through the template wave 39 held loosely. “Holded loosely” means held to such an extent that the balls can move to adjust the axial center of the stator. 40 in the axial direction D2 the template wave 39can move and that the elements for adjusting the axial center of the stator 42 in the radial direction D3 They can move. The balls are used to adjust the axial center of the stator. 40 in the axial direction D2 the template wave 39 Moving means that the balls move to adjust the axial center of the stator. 40 move when the external thread is used to adjust the axial center of the stator 39b into the internal thread for adjusting the axial center of the stator 41b It is screwed in. That the elements for adjusting the axial center of the stator 42 in the radial direction D3 Moving means that the elements for adjusting the axial center of the stator 42 in the radial direction D3 through the balls for adjusting the axial center of the stator 40 are pushed upwards, which are on the inclined section 39arise when the external thread is used to adjust the axial center of the stator 39b into the internal thread for adjusting the axial center of the stator 41b It is screwed in. On the inclined section 39a "To rise" means that the balls move to adjust the axial center of the stator. 40 , which come into contact with the outer surface of the inclined section 39a with the tapered shape, from the central axis AX in the radial direction D3 move away. The retaining part for the balls for adjusting the axial center of the stator. 41 and the rotation stop element 44 are through the fastening element 56 fastened and integrated together.

[0063] Next, the procedures for adjusting the eccentricity are described. The elements for adjusting the axial center of the stator are then discussed. 42are designed such that the outer ends of the elements are used to adjust the axial center of the stator 42 in the radial direction after the process of temporarily positioning the inside of the stator 2 are facing each other. After the support beam sections 19b of the first storage part 19 were attached in such a way that they passed through the stopper element 44a of the rotation stop element 44 the centering adjustment template 45 The first bearing retainer is sandwiched and held in place. 19 on the casing 6 fastened. Then the second bearing retainer part is attached. 20 on the casing 6 attached. The centering adjustment template 45 is through the first radial magnetic bearing 13 and the second radial magnetic bearing 16 on the casing 6 held. Only the template wave 39the centering adjustment template 45 is rotated, and when the external thread is used to adjust the axial center of the stator 39b into the internal thread for adjusting the axial center of the stator 41b As the screws are tightened, the balls rise to adjust the axial center of the stator. 40 on the inclined section 39a the template wave 39 up. The inclined section 39a ascending balls for adjusting the axial center of the stator 40 move the elements to adjust the axial center of the stator 42 in the radial direction D3 the template wave 39 That is, the elements for adjusting the axial center of the stator. 42 are moved in such a way that each of the elements is used to adjust the axial center of the stator. 42 from the template wave 39 moved away. The outer ends of the elements for adjusting the axial center of the stator.42 in the radial direction come into contact with the inside of the stator 2 , and the temporarily positioned central axis AX of the stator 2 is in the radial direction D3 of the stator 2 moved.

[0064] The external thread for adjusting the axial center of the stator 39b the template wave 39 is inserted into the internal thread to adjust the axial center of the stator 41b of the holding part for the balls for adjusting the axial center of the stator 41 screwed until the outer ends of the elements are aligned with the axial center of the stator 42 uniformly in contact with the inside of the stator in the radial direction 2 come. After the outer ends of the elements have made uniform contact, the axial center of the stator is set. 42 in the radial direction with the inside of the stator 2Once confirmed, the positional relationship between the stator 2 and the casing 6 It is fixed. Specifically, a fastening tool is inserted into the through-hole. 19c of the first storage part 19 inserted, and the fastening element 56 is rotated by the fastening tool in such a way that there is no deviation in the positional relationship, whereby the fastening element 56 in this way into the hole 51a of the stator holding part 51 It is screwed on. This creates the flange. 53 in contact with the stator holding part 51 and is attached to the stator holding part 51 attached.

[0065] Then the first storage part will be 19 from the casing 6 removed. The external thread is then used to adjust the axial center of the stator. 39b , which is inserted into the internal thread for adjusting the axial center of the stator 41bof the holding part for the balls for adjusting the axial center of the stator 41 is screwed loose, so that there is play between the inside of the stator 2 and the outer ends of the elements for adjusting the axial center of the stator 42 created in the radial direction, and the centering adjustment template 45 will be removed. It should be noted that when assembling the template shaft... 39 at the first storage part 19 and the second storage part 20 Coaxiality and rotational operation must be ensured by clearance fitting. Accordingly, the first bearing support part can be 19 and the second storage part 20 therefore include ball bearings or tapered plain bearings.

[0066] As a result of the procedures described above, the position of the central axis AX of the stator 2 with high precision on the central axis AX the rotating shaft 8 aligned. After the eccentricity adjustment process, the rotating body is attached to the casing. 6 Assembled. It should be noted that the rotating body is a rotating assembly to which components other than the rotating blade assemblies and the rotating parts, which are components of the magnetic thrust bearings, are assembled and fastened. Specifically, the rotating body is assembled by components other than the first rotating blade assembly. 11 , the second rotating blade arrangement 12 , the turned part 17a and the rotating part 18a from the engine 3 , the first stator blade arrangement 5 , the rotating shaft 8 , the first rotating blade arrangement 11 , the second rotating blade arrangement 12 , the turned part 17a and the rotating part 18a formed, as is the case in Fig. Figure 1 shows such a rotating body on the inside of the stator.2 formed and planned. Subsequently, the first rotating blade arrangement is created. 11 and the second rotary blade arrangement 12 attached accordingly to both ends of the rotating body. The first bearing retainer part 19 will be attached to the casing 6 attached, the first radial magnetic bearing 13 will be at the first storage part 19 attached, and the fixed part 17b will be at the first radial magnetic bearing 13 fastened. The second bearing retainer part 20 will be attached to the casing 6 attached, the second radial magnetic bearing 16 will be at the second storage part 20 attached, and the fixed part 18b is attached to the second radial magnetic bearing 16 attached. Finally, the rotating part is 17a , which is a component of the first magnetic thrust bearing 17 is, and the rotating part 18a , which is a component of the second magnetic thrust bearing 18is, on the rotating shaft 8 attached.

[0067] The position of the central axis AX of the rotor 1 in the radial direction D3 relative to the central axis AX the casing 6 varies depending on the precision of the component processing and the precision of the cladding positioning. 6 and the bearing components, the precision of the positioning of the radial magnetic bearings and the template shaft 39 and the precision of the rotor's external dimensions 1 The provision of the eccentricity adjustment part 7 It allows the position of the central axis to be adjusted during the eccentricity adjustment process. AX of the stator 2 in the radial direction D3 with high precision on the position of the central axis AX of the rotating shaft 8 attached rotors 1 in the radial direction D3to align, without compromising the precision of the component processing around the casing 6 and the precision of the component assembly is affected. In this way, the position of the central axis is affected. AX of the stator 2 about the casing 6 with high precision on the central axis AX of the rotor 1 aligned.

[0068] If the eccentricity adjustment part 7 is not provided for and the central axis AX of the rotor 1 relative to the central axis AX of the stator 2 The interplay between the inside of the stator becomes eccentric. 2 and the outer circumference of the rotor 1 in the circumferential direction D1 not uniform, i.e., between the stator 2 and the rotor 1 The generated attractive force is in the circumferential direction. D1not uniform. If the eccentricity of the central axis AX of the rotor 1 relative to the central axis AX of the stator 2 The larger the eccentricity adjustment part, the greater the attractive force generated in the electric lathe. 7 This allows the eccentricity to be smaller and reduces the attractive force generated in the electric lathe.

[0069] In the eccentricity adjustment part of the related technique, a casing and a flange of a bearing housing are provided at a position at one end of the casing, and the position of the central axis of the rotating shaft is adjusted relative to the central axis of the stator. In a case where, as in the present embodiment, rotating blade assemblies are located on both sides of the rotor 1 The distance from the position where the stator is located is planned. 2 and the rotor 1, which are components of the engine 3 which are provided for, up to the position where the eccentricity adjustment part 7 is intended to be larger than in the case where rotary blade arrangements are not on both sides of the rotor. 1 are intended. Therefore, problems arose insofar as the rotating shaft 8 , on which the rotary blade assemblies are mounted, is deformed by the influence of the dead weight of the rotary blade assemblies and their imbalance, the eccentricity of the rotary shaft 8 cannot be measured precisely and the increase in the eccentricity of the central axis AX of the rotor 1 relative to the central axis AX of the stator 2 cannot be prevented. To ensure the flatness of the rotating shaft 8 to maintain and the play between the inside of the stator 2 and the outer circumference of the rotor 1To ensure uniformity so that the rotating body does not come into contact with the bearings, the eccentricity adjustment parts of the related technique must also be installed at both ends of the casing. 6 This must be provided. If the eccentricity adjustment parts are provided in two positions, a mounting device for fine-tuning two bearing retainers relative to the casing is required. 6 This is required, which increases the cost of manufacturing the axial fan. As the number of positions to be adjusted continues to increase, the measurement of the rotating shaft's eccentricity becomes necessary. 8 and the adjustment of the positions of the bearing components must be repeated several times, which prolongs the eccentricity adjustment process and further increases the cost of manufacturing the axial blower.

[0070] Regarding the axial fan 100 According to the present embodiment, the eccentricity adjustment part 7 on the outer circumference of the stator2 provided for. Accordingly, the distance from the position where the stator is located decreases. 2 and the rotor 1 are intended to be located at the position where the eccentricity adjustment part is located. 7 is not intended to, even if the rotating blade arrangements are on both sides of the rotor. 1 are provided for. In this way, an alignment of the position of the center axis can be achieved. AX the inside of the stator 2 on the central axis AX of the rotor 1 This can be achieved with high precision. Furthermore, it requires only a single eccentricity adjustment part. 7 Sufficiently, no extensive assembly device is necessary during the eccentricity adjustment process, steps such as measuring the eccentricity of the rotating body are eliminated, and there is no increase in the cost of manufacturing the axial blower. 100 is avoided. <Betrieb des Axialgebläses 100>

[0071] Now the operation of the axial blower is to be 100 with the structure described above. It should be noted that the "first radial magnetic bearing" 13 “and the “second radial magnetic bearing” 16 These can be referred to simply as "radial magnetic bearings" in the following. The rotating body of the axial blower 100 is in a state in which the rotating body is not in contact with the bearing retainers and the casing 6 It is rotatably mounted by a first bearing and a second bearing. The axial fan 100 is installed in such a way that the central axis AX the rotating shaft 8 is horizontal. In this way, the rotating body on which the first rotating blade assembly is attached becomes 11 and the second rotary blade arrangement 12The components for circulating the laser medium gas are mounted on radial magnetic bearings at both ends of the rotating body, allowing them to rotate in a contactless manner in the direction where their own weight acts. "Contactless" means that the rotating body is not in contact with the casing. 6 A sensor unit for detecting the position of the radial magnet bearings, which is provided near the radial magnet bearings, detects the position of a sensor target that is attached to the rotating shaft. 8 The stationary parts of the radial magnetic bearings are operated in such a way that the shaft is set to a predetermined position. The rotating body rotates by receiving the rotary drive force from the motor. 3 of the axial fan 100 receives. When the rotating blade assemblies mounted on the rotating body rotate, the laser medium gas is distributed in the axial direction. D2 the rotating shaft 8 into the axial fan 100The drawn-in laser medium gas flows between the leaves. 11c the first rotary blade arrangement 11 , takes through the rotating leaves 11c Velocity energy is absorbed and flows out of the first rotating blade assembly at high speeds. 11 out.

[0072] The laser medium gas then flows between the blades. 54 the first stator blade arrangement 5 The vortex flow of the laser medium gas, caused by turbulence during passage through the first rotating blade arrangement 11 is generated by the first stator blade arrangement 5 into a flow in the axial direction of the rotating shaft 8 converted, thereby straightening the flow and the straightened flow of the laser medium gas from the first stator blade arrangement 5 outflows. The straightened flow of the laser medium gas enters between the leaves. 12cthe second rotating blade arrangement 12 one, takes through the rotating leaves 12c Velocity energy is absorbed, and flows out of the second rotating blade assembly at high speeds. 12 out. In this way, the air from the axial fan is extracted. 100 The laser medium gas is expelled at high speeds. This is due to a pressure difference in the laser medium gas between the intake and exhaust sides of the axial fan. 100 When generated, a pressure force acts on the rotating body in the axial direction. D2 the rotating shaft 8 in the direction of the first bearing. The sensor (not shown) for detecting the position of the magnetic thrust bearing, which is located near the first magnetic thrust bearing. 17 The device is designed to detect the rotational position of a target not shown, which is attached to the rotating shaft. 8is provided for, and the stationary part of the magnetic thrust bearing is operated in such a way that the rotating shaft 8 is set to a predetermined position. <Vorteilhafte Wirkungen>

[0073] Since the bearings of the axial blower 100 Magnetic bearings allow the rotating body to be mounted without mechanical contact. Since no wear is generated by contact, the service life of the axial fan is extended. 100 Furthermore, the engine can 3 They are rotated at high speeds, which improves the gas circulation function, i.e., the gas cooling performance of the axial fan. 100 , improved. <Durch den Exzentrizitätseinstellungsteil 7 wird eine höhere Starrheit erzielt (vorteilhafte Wirkung 1)>

[0074] Next, a beneficial effect resulting from the eccentricity adjustment part will be explained. 7 is caused by the axial fan. 100To rotate at high speeds, it is essential to prevent the bending natural frequency of the rotating body from decreasing. To prevent this, the weight of the rotating body and the length of the rotating shaft must be reduced. 8 The rotational force of the rotating body must be increased. The radial magnetic bearings generate a magnetic attraction force that pulls the rotating shaft into place. 8 It is stored. The magnetic attraction that the rotating shaft 8 When stored in a preset position, there is an attractive force that the rotating shaft 8 against the self-weight of the rotating body and the force exerted by the motor 3 The attractive force generated by the motor is stored. 3 The generated attractive force is a magnetic attractive force that exists between the stator 2 and the rotor 1 is generated when the eccentricity of the central axis AX of the stator 2 relative to the central axis AX of the rotor 1 As it gets bigger, the amount of power supplied by the engine increases. 3 The generated attractive force is therefore necessary to ensure a predetermined bearing force, i.e., a magnetic attraction force of the magnetic bearings. This requires magnetic bearings with a high bearing force, which increases the size of the radial magnetic bearings. The increase in size of the radial magnetic bearings leads to an increase in the external dimensions, such as the wavelength, of the rotating parts of the radial magnetic bearings, an increase in the weight of the rotating parts of the radial magnetic bearings, and a decrease in the bending natural frequency of the rotating body. The provision of the eccentricity adjustment part 7 It allows the position of the central axis AX of the stator 2 with high precision on the position of the central axis AX of the rotor 1to align the rotating body, which prevents the generation of magnetic attraction due to an increase in eccentricity, as described above. The bearing force of the magnetic bearings, which support the rotating body, is eliminated, and the size and weight of the magnetic bearings are reduced. As a result of the reduced size of the magnetic bearings, the length of the rotating body in the axial direction is shortened, the rigidity of the rotating body is improved, and the weight of the rotating body is further reduced. This prevents the bending natural frequency of the rotating body from decreasing, and the rotating body can rotate at high speeds, which improves gas circulation performance. Furthermore, the eccentricity adjustment process does not require extensive assembly equipment, steps such as measuring the eccentricity of the rotating body are unnecessary, and there is no increase in the manufacturing cost of the axial blower.100 will be prevented. <Durch die Bereitstellung von Drehblattanordnungen an beiden Seiten des Rotors 1 wird eine höhere Starrheit erzielt (vorteilhafte Wirkung 2)>

[0075] Next, an advantageous effect resulting from the provision of the first rotating leaf arrangement will be explained. 11 and the second rotating blade arrangement 12 on both sides of the rotor 1 is caused by the axial fan. 100 is the turned part 13a of the first radial magnetic bearing 13 at one end of the rotating shaft 8 provided for, and the first radial magnetic bearing 13 , the first rotary blade arrangement 11 , the rotor 1 , the second rotating blade arrangement 12 and the second radial magnetic bearing 16 are in this order along the axial direction D2 the rotating shaft 8 arranged. In this way the rotor is positioned 1in the middle of the rotating shaft 8 , and the rotating blade assemblies are located on both sides of the rotor. 1 , and the rotating parts of the radial magnetic bearings are located on both sides of the rotating blade assemblies. To ensure a flow of laser medium gas through the axial blower. 100 To effectively turn over the soil, the shovels will be used. 54 the first stator blade arrangement 5 The blades of the rotary blade assemblies are preset in a predetermined shape, and the blades 54 the first stator blade arrangement 5 and the blades of the rotary blade assembly are set to predetermined positions. In particular, the distances between the blades are adjusted. 54 the first stator blade arrangement 5and the blades of the rotating blade assemblies are preferably adjusted to be small. The stator blade assembly forms a velocity distribution that guides the flow of the laser medium gas without causing a pressure loss between the rotating blade assemblies. The pressure loss corresponds to an energy loss. If the distances between the blades 54 the first stator blade arrangement 5 Since the rotor blades of the rotating blade arrangements are larger, the velocity distribution of the laser medium gas flow varies, increasing the pressure drop and thus reducing the flow rate of the laser medium gas. Consider a case where the rotor 1 in the middle of the rotating shaft 8 is located and in which the rotor 1 , a rotating blade assembly and the rotating parts of a thrust bearing and a radial magnet bearing in that order starting from the rotor 1 to one end of the rotating shaft 8are arranged. In this case, the wavelength of the cylindrical part of the rotating blade assembly is longer than in a case where the rotor 1 , a rotary blade arrangement in which the rotating parts of a thrust bearing and a radial magnet bearing are arranged in the following order: rotor 1 The rotary blade assembly consists of a radial magnetic bearing and a thrust bearing. The reason the wavelength of the cylindrical part of the rotary blade assembly increases is that, in a state where the thrust bearing is present between the rotary blade assembly and the rotating part of the radial magnetic bearing, the stationary part of the rotary blade assembly is attached to the cylindrical part of the rotary blade assembly. However, as the wavelength of the cylindrical part of the rotary blade assembly increases, the blades of the rotary blade assembly tend to rotate radially due to centrifugal force during high-speed rotation. D3 to spread out. In this way, the sheathing tends to6 and the blades of the rotating blade assembly come into contact with each other. The spreading of the blades of the rotating blade assembly due to centrifugal force is prevented, and contact between the sheathing is established. 6 and the blades of the rotating blade assembly are prevented by increasing the thickness of the connection between the backplate part of the rotating blade assembly and the cylindrical part of the rotating blade assembly, i.e., by reinforcing the connection. However, if the thickness of the connection between the backplate part of the rotating blade assembly and the cylindrical part of the rotating blade assembly increases, the weight of the rotating blade assembly also increases. If the weight of the rotating body increases with the weight of the components on the rotating shaft... 8 As the rotational speed of the mounted rotary blade assembly increases, the bending natural frequency of the rotating body decreases, which prevents the rotational speed of the rotating body from increasing. In the case of the axial blower... 100According to the first embodiment, however, the rotor 1 , the rotary blade assembly, the radial magnetic bearing and the thrust bearing in that order starting from the center of the rotating shaft 8 in the axial direction D2 to one end of the rotating shaft 8 The arrangement is such that the thrust bearing is not located between the rotating blade assembly and the radial magnet bearing. This allows the radial magnet bearing to be positioned closer to the rotating blade assembly, shortening the wavelength of the cylindrical part of the rotating blade assembly and reducing its weight. This, in turn, reduces the weight of the rotating body, prevents a decrease in its natural bending frequency, and enables the rotating body to rotate at high speeds.

[0076] Here is an example of specific results from the analysis of the operation of the axial fan. 100will be presented. In this example, it is assumed that the engine 3 has an output power of approximately 7 kW, that the flange 53 four through holes 53a with a diameter of 5.8 mm, which are evenly spaced, and that four holes 51a evenly at the ends of the stator mounting part 51 are arranged in the axial direction. Furthermore, it is assumed that a metric thread with an outer diameter of 5.0 mm will be used as a fastening element. 56 It is used that the adjustment range between the through hole 53a and the metric thread is 0.4 mm and that the flange 53 on the stator holding part 51is attached. As a result of the analysis of the natural vibration using the finite element method, if the number of revolutions of the rotating body is 333 Hz, i.e., 20,000 rpm, the primary bending natural frequency of the rotating body is approximately 1,200 Hz. The primary bending natural frequency is about three times the number of revolutions, which provides sufficient frequency margin, demonstrating that the rotating body can perform the rotational process. Second embodiment

[0077] Fig. Figure 6 is a cross-sectional view of an axial fan according to a second embodiment. In an axial fan 100A According to the second embodiment, the second bearing retainer present in the first embodiment is 20 on the outlet side by a second stator blade arrangement 46 replaced. The second stator blade arrangement 46 It is located on the inside of the casing. 6, and a second bearing is located on the second stator blade assembly. 46 attached. The casing 6 is a cover element that protects the engine 3 , the first stator blade arrangement 5 , the second stator blade arrangement 46 , the first rotary blade arrangement 11 and the second rotary blade arrangement 12 absorbs. The axial fan 100A According to the second embodiment, effects similar to those of the first embodiment are produced. Furthermore, the axial fan... 100A according to the second embodiment due to the second stator blade arrangement 46 the flow from the second rotary blade arrangement 12 The emitted laser medium gas is straightened into a flow in the axial direction, resulting in an efficient axial blower. 100A This results in an increase in the gas circulation capacity of the axial blower. 100A further. Third embodiment

[0078] Fig. Figure 7 is a perspective view of a laser oscillator according to a third embodiment. Fig. Figure 8 is a cross-sectional view of the laser oscillator according to the third embodiment. A laser oscillator 200 includes a housing 201 , which is a vacuum container in which a laser medium gas is contained 300 is encapsulated, a discharge unit 202 , which are used for discharging the laser medium gas 300 is used to create a partially reflective mirror 203 , a totally reflective mirror 204 , a heat exchanger 205 , which is the laser medium gas 300 cools, and an axial fan 100 , the laser medium gas 300 overturned. The discharge unit 202 includes a pair of discharge electrodes 202a and 202b The totally reflective mirror 204 and the semi-reflective mirror 203are located on the sides of the case. 201 positioned in the direction of the optical axis, they form an optical resonator. A laser 400 is reflected by the partially reflective mirror 203 emitted. In a case where a window is used instead of a totally reflecting mirror. 204 and the partially reflective mirror 203 Once mounted, the laser oscillator works. 200 as a laser amplifier. The laser medium gas flows through it. 300 through the heat exchanger 205 , before it enters the discharge unit 202 enters, and is in the case 201 by four axial fans 100 overturned.

[0079] Now the operation of the laser oscillator will begin. 200 described. The rotating shafts 8 , on which a rotary blade assembly is mounted, rotate at high speeds of several tens of thousands of rpm by drawing the rotational driving force from the motors 3received, which are in the axial fans 100 are included. In the axial fans 100 the laser medium gas flows 300 around the engines 3 and straight ahead in the axial direction D2 The axial direction D2 is equal to the one in Fig. The direction of gas flow is shown in section 7. The engines 3 They rotate at high speeds to increase the air volume, which improves performance in cooling the circulating laser medium gas. 300 increased, and the size of the laser oscillator 200 The power output is reduced and increased. It should be noted that the axial fans... 100A according to the second embodiment in the laser oscillator 200 can be used, producing similar effects to the case where the axial fans are used. 100 be used.

[0080] The configurations presented in the above embodiments are examples of the present invention, wherein they can be combined with other known technologies or partially omitted or modified without deviating from the scope of protection of the present invention. Reference symbol list

[0081] 1 Rotor; 2 Stator; 3 Motor; 5 First stator blade assembly; 6 Casing; 6a, 6b, 9a1, 11a1, 12a1, 19c, 53a Through hole; 6c Base; 6d, 19b1 Screw hole; 7 Eccentricity adjustment part; 8 Shaft; 9 Retaining part for first blade assembly; 9a, 10a First annular section; 9b, 10b Second annular section; 10 Retaining part for second blade assembly; 10a1 Screw through hole; 11 First blade assembly; 11a, 12a Back plate part; 11a2, 12a2 Blade retaining hole; 11b, 12b, 19a, 20a Cylindrical part; 11c, 12c, 54 Blade; 12 Second blade assembly; 13 First radial magnetic bearing; 13a, 16a, 17a, 18a Rotating part; 13b, 16b, 17b, 18b Fixed part; 14, 15 Rotary blade mounting screw; 16 Second radial magnetic bearing; 17 First magnetic thrust bearing; 18 Second magnetic thrust bearing; 19 First bearing retainer; 19b, 20b, 44b Support beam part; 19b2 Pin hole; 20 Second bearing retainer; 29 First radial magnetic bearing part; 30 Second radial magnetic bearing part;39 Template shaft; 39a inclined section; 39b external thread for adjusting the axial center of the stator; 40 ball for adjusting the axial center of the stator; 41 retaining element for the balls for adjusting the axial center of the stator; 41a retaining groove for the balls for adjusting the axial center of the stator; 41b internal thread for adjusting the axial center of the stator; 42 element for adjusting the axial center of the stator; 42a resin strip; 43 template cover; 43a groove for an element for adjusting the axial center of the stator; 44 rotation stop element; 44a stop element; 45 centering adjustment template; 46 second stator blade assembly; 47 pin; 51 stator retaining element; 51a hole; 51b O-ring; 51c annular groove; 51d groove; 52 blade base part; 53 flange; 53b clearance; 55 Cover; 56 Fastening element; 60, 61 Screw; 71 Inlet pipe; 72 Outlet pipe; 73 Power cable; 100, 100A Axial fan; 200 Laser oscillator; 201 Housing; 202 Discharge unit;202a, 202b Discharge electrode; 203 Partially reflective mirror; 204 Totally reflective mirror; 205 Heat exchanger; 300 Laser medium gas; 400 Laser; AX Central axis; D1 Circumferential direction; D2 Axial direction; D3 Radial direction.; QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 5742560

[0004] WO 2015 / 093076

[0004]

Claims

[1] Rotary drive device comprising: a rotating shaft; a rotor that is provided on an outer circumference of the rotating shaft; a stator that is provided on an outer circumference of the rotor; a casing that houses the stator; a pair of bearings which are provided accordingly at both ends of the rotating shaft and which support the rotating shaft; a pair of bearing retaining parts, which are provided accordingly at both ends of the casing and hold the bearings; a stator holding part that is provided on an outer circumference of the stator; a cylindrical element provided on an outer circumference of the stator holding part; a flange extending from one end of the cylindrical element in an axial direction towards the rotating shaft and facing one end of the stator mounting part in the axial direction; and a fastening element which is attached via the flange to the end of the stator retaining part in the axial direction, wherein the flange has a through hole that extends axially through the flange and into which the fastening element is inserted, the through-hole has a diameter that is smaller than that of a head of the fastener and larger than that of a screw part of the fastener, the rotating shaft, the rotor, the stator, the stator retaining part and the cylindrical element are arranged in this order in a radial direction in the casing, and the rotating shaft, the rotor, the stator, the stator holding part and the cylindrical element are arranged concentrically. [2] Rotary drive device according to claim 1, wherein the bearings are magnetic bearings which support the rotary shaft in a contactless manner with respect to the bearing retaining parts. [3] Method for mounting the rotary drive device according to claim 1 or 2, wherein the method comprises: a position setting step of setting a position of a central axis of the stator in the radial direction relative to a central axis of the rotor in a state in which one end of the flange is in axial contact with the end of the stator retaining part in the axial direction; and a step of attaching the flange to the stator holder by screwing the fastening element into the end of the stator holder after the position setting step. [4] Axial blowers, comprising: a rotating shaft which is equipped with a first rotating blade assembly and a second rotating blade assembly for circulating gas; a rotor that is provided on an outer circumference of the rotating shaft; a stator that is provided on an outer circumference of the rotor; a casing that accommodates the stator, the first rotating blade assembly, the second rotating blade assembly and a first stator blade assembly; a pair of bearings which are provided accordingly at both ends of the rotating shaft and which support the rotating shaft; a pair of bearing retaining parts, which are provided accordingly at both ends of the casing and hold the bearings; a stator holding part that is provided on an outer circumference of the stator; a cylindrical element that is provided on an outer circumference of the stator holding part and is provided on an outer circumference thereof with the first stator blade arrangement; a flange extending from one end of the cylindrical element in an axial direction towards the rotating shaft and facing one end of the stator mounting part in the axial direction; and a fastening element which is attached via the flange to the end of the stator retaining part in the axial direction, wherein the first stator blade assembly is attached to an inner side of the casing, the flange has a through hole that extends axially through the flange and into which the fastening element is inserted, the through-hole has a diameter that is smaller than that of a head of the fastener and larger than that of a screw part of the fastener, the rotating shaft, the rotor, the stator, the stator retaining part, the cylindrical element and the first stator blade assembly are arranged in this order in a radial direction in the casing, and the rotating shaft, the rotor, the stator, the stator holding part, the cylindrical element and the first stator blade assembly are arranged concentrically. [5] Axial blower according to claim 4, wherein the bearings are magnetic bearings which support the rotating shaft in a contactless manner with respect to the bearing retaining parts. [6] Axial blower according to claim 4 or 5, wherein the rotating shaft is equipped with a radial bearing and a thrust bearing, and The rotor, the first blade assembly, the radial bearing and the thrust bearing are arranged in this order from a center of the rotating shaft in the axial direction to an end of the rotating shaft. [7] Axial blower according to claim 6, wherein a second stator blade assembly is housed in the casing in addition to the stator, the first rotating blade assembly, the second rotating blade assembly and the first stator blade assembly, the second stator blade assembly is attached to the inside of the casing, and the radial bearing is held by the second stator blade assembly. [8] Laser oscillator, comprising: a housing in which a laser medium gas is encapsulated; a discharge unit to pump the laser medium gas by electrical discharge; the axial blower according to one of claims 4 to 7 for circulating the laser medium gas pumped through the discharge unit; and a heat exchanger for cooling the laser medium gas. [9] Method for mounting the axial fan according to any one of claims 4 to 7, wherein the method comprises: a step of setting a position of a central axis of the stator in the radial direction relative to a central axis of the rotor in a state in which one end of the flange is in axial contact with the end of the stator retaining part in the axial direction; and One step of attaching the flange to the stator holder by screwing the fastening element into the end of the stator holder after the adjustment step.