Rotating machinery

Abstract

The present invention provides a rotating machine in which the gear housing is less susceptible to the heat effects from the housing cover. The rotating machine (30) includes: a gear housing (36) housing a large gear (34) and a small gear (35); a housing cover (42) configured to form a gap between it and the back of an impeller (41); a drive shaft (43) inserted into a hole (42a) in the housing cover (42) and connecting the impeller (41) and the small gear (35); a mounting part (51) provided on a portion of the opposing surface (37a) of the outer side of the gear housing (36) opposite to the housing cover (42), which is annular or arc-shaped with the rotation center axis of the impeller (41) as the center; and a heat insulation member (53) clamped between the mounting part (51) and the housing cover (42).

Description

Technical Field

[0001] This invention relates to rotating machinery. Background Technology

[0002] In recent years, carbon dioxide has been considered to have a significant impact on global warming. As an effective countermeasure to this problem, technologies such as carbon dioxide recovery and storage have attracted attention. Furthermore, the demand for centrifugal compressors in high-temperature and low-temperature gases has increased in recent years. As a centrifugal compressor, for example, a gear-type centrifugal compressor disclosed in Patent Document 1 is known. Figure 9 As shown, the gear-type centrifugal compressor 1 disclosed in Patent Document 1 includes: an expansion turbine 10 having a turbine rotor 14 and a turbine housing 11; and a speed increaser 20 driving the turbine rotor 14. The turbine housing 11 is composed of a cylindrical main body 12 and a disc-shaped cover 13 that closes the end of the main body 12. The speed increaser 20 includes a gear housing 21 and a gear mechanism (not shown) housed within the gear housing 21. When a high-temperature fluid is supplied to the expansion turbine 10, the temperature of the turbine housing 11 may rise.

[0003] Existing technical documents Patent documents Patent document 1: Japanese Patent Application Publication No. 2016-56722. Summary of the Invention

[0004] The problem that the invention aims to solve In paragraph 0015 of Patent Document 1, it is stated that "it is not necessary to separate the turbine housing 11 and the gear housing 21; they can also be arranged so that the opposing surfaces 13b and 21b abut against each other, or a heat insulation element can be provided between them." However, since the contact area between the gear housing 21 and the turbine housing 11 becomes larger, even if only a heat insulation element is provided, the gear housing 21 may be affected by heat from the turbine housing 11 (housing cover).

[0005] The present invention was made in view of the above-mentioned problems, and the object is to provide a rotating machine in which the gear housing is less susceptible to the effects of heat from the housing cover.

[0006] Methods for solving problems The rotating machine of the present invention includes: an actuating part for compressing or expanding gas; and a transmission mechanism for transmitting power to the actuating part; the transmission mechanism includes: a large gear; a small gear for meshing with the large gear; and a gear housing for housing the large gear and the small gear; the actuating part includes: an impeller; a housing cover arranged to form a gap with the back surface of the impeller; and a drive shaft inserted into a hole in the housing cover and connecting the impeller to the small gear. The rotating machine further includes: a mounting part, a portion of the opposing surface of the gear housing opposite the housing cover, which is annular or arc-shaped about the rotation axis of the impeller; and a heat insulation member clamped between the mounting part and the housing cover.

[0007] In the aforementioned rotating machinery, a mounting portion is provided on a portion of the opposing surface of the gear housing, opposite to the housing cover, and a heat-insulating member is clamped between the mounting portion and the housing cover. Therefore, the gear housing is less susceptible to the heat effects from the housing cover.

[0008] Alternatively, the aforementioned housing cover may have a through hole for inserting a bolt to secure the aforementioned housing cover to the aforementioned mounting portion. Furthermore, the aforementioned mounting portion may have a bolt-fastening hole for tightening the aforementioned bolt. In this case, the aforementioned bolt-fastening hole may also be a non-through hole that does not penetrate the aforementioned mounting portion.

[0009] In this method, since the bolt fastening hole is formed as a non-through hole that does not penetrate the mounting part, it is possible to suppress the heat from the housing cover from being transferred to the gear housing via the bolt.

[0010] Alternatively, the aforementioned housing cover may include a main body portion having the aforementioned opening, and other mounting portions protruding from the aforementioned main body portion toward the aforementioned mounting portion. In this case, the aforementioned heat insulation member may also be clamped between the aforementioned mounting portion and the aforementioned other mounting portions.

[0011] In this configuration, the main body of the housing can be further separated from the gear housing. Furthermore, a heat-insulating member is sandwiched between other mounting portions of the housing. Therefore, this design makes it more difficult for heat from the housing to be transferred to the gear housing.

[0012] Alternatively, the aforementioned other mounting parts may have additional bolt insertion holes for inserting bolts to secure the aforementioned housing cover to the aforementioned gear housing. In this case, the aforementioned mounting parts may also have bolt fastening holes for tightening the aforementioned bolts.

[0013] Alternatively, the aforementioned mounting portion may have bolt insertion holes for inserting bolts to secure the aforementioned housing cover to the aforementioned gear housing. Furthermore, other mounting portions may have other bolt insertion holes for inserting the aforementioned bolts. In this case, the aforementioned gear housing may also have bolt fastening holes for tightening the aforementioned bolts.

[0014] Alternatively, the aforementioned insulation component can be a sheet material containing thermosetting resin.

[0015] Alternatively, the aforementioned rotating machinery may also include a positioning mechanism for positioning the aforementioned insulation component relative to the aforementioned mounting portion.

[0016] In this method, the insulation component can be positioned at the mounting part using a positioning mechanism, and the housing cover can be fixed relative to the mounting part in this state. Therefore, the housing cover can be fixed at the mounting part without causing the insulation component to shift, thus preventing the operation of installing the housing cover relative to the gear housing from becoming complicated.

[0017] Alternatively, the aforementioned gear housing may have an upper component and a lower component, wherein the lower component is a separate component from the aforementioned upper component and is located on the lower side in the direction of gravity relative to the aforementioned upper component. In this case, the aforementioned mounting portion may also be provided on the aforementioned lower component, and the aforementioned upper component and the aforementioned housing cover may be separated from each other.

[0018] In this method, during the maintenance of rotating machinery, the upper part of the gear housing can be removed, thus preventing the installation part from becoming an obstacle.

[0019] Alternatively, the aforementioned rotating machinery could be a centrifugal compressor.

[0020] Invention Effects As explained above, according to the present invention, the gear housing is less susceptible to the effects of heat from the housing cover. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the rotating machinery according to the first embodiment.

[0022] Figure 2 This is a diagram used to illustrate the structure of a gear housing installed in rotating machinery.

[0023] Figure 3 This is a cross-sectional view of the rotating machinery according to the second embodiment.

[0024] Figure 4 This is a cross-sectional view of a rotating machine with respect to a modified example of the second embodiment.

[0025] Figure 5 This is a cross-sectional view of a rotating machine with respect to a modified example of the second embodiment.

[0026] Figure 6 This is a diagram illustrating the positioning mechanism provided in the rotating machinery of the third embodiment.

[0027] Figure 7 This is a diagram used to illustrate a variation of the positioning mechanism.

[0028] Figure 8 This is a diagram used to illustrate a variation of the positioning mechanism.

[0029] Figure 9 This is a diagram that roughly represents a conventional centrifugal compressor. Detailed Implementation

[0030] The following is a reference to the appendix. Figure 1 The methods for implementing the present invention will be described in detail below.

[0031] (First Embodiment) like Figure 1 As shown, the rotating machinery 30 of this embodiment includes an actuating section 31 for compressing gas and a transmission mechanism 32 for transmitting power from a drive source to the actuating section 31. The rotating machinery 30 is configured as a centrifugal compressor, which is configured to compress gas. Examples of gases that can be compressed include carbon dioxide (CO2), liquefied natural gas (LNG), and water vapor. When high-temperature carbon dioxide is compressed, high-temperature heat is generated in the actuating section 31. When liquefied natural gas is compressed, low-temperature heat is transferred from the actuating section 31 to the transmission mechanism 32. That is, the gas to be compressed is either low-temperature (below 0°C) or high-temperature (above 100°C). Furthermore, the rotating machinery 30 is not limited to a centrifugal compressor. For example, the rotating machinery 30 may also be configured as a turbine for expanding gas. In this case, the actuating section 31 is used to expand the gas. If the target gas is carbon dioxide (CO2), the CO2 delivered by the rotating machinery 30 can be effectively utilized.

[0032] The transmission mechanism 32 includes a large gear 34, a small gear 35 meshing with the large gear 34, and a gear housing 36 housing the large gear 34 and the small gear 35. The gear housing 36 has: a first part 37; a second part 38 disposed away from the first part 37; and a connecting part 39 connecting the first part 37 and the second part 38 to form a space S between the first part 37 and the second part 38.

[0033] A large gear 34 is disposed within a gear housing 36. Specifically, the large gear 34 is positioned between the first component 37 and the second component 38, and is located within the space S surrounded by the connecting portion 39. The shaft of the large gear 34 (not shown) is rotatably supported by the first component 37 and the second component 38 of the gear housing 36. The shaft of the large gear 34 is connected to a drive source (motor) disposed outside the gear housing 36 (not shown). Therefore, the large gear 34 is driven by the drive source to rotate about its shaft.

[0034] The pinion 35 is also disposed between the first component 37 and the second component 38, and is disposed in the space S surrounded by the connecting portion 39. Since the pinion 35 meshes with the large gear 34, the pinion 35 rotates when the large gear 34 rotates.

[0035] The actuating unit 31 includes an impeller 41, a housing 42, a drive shaft 43, and a housing 44. The drive shaft 43 is connected to a pinion 35 and is rotatably supported by the first component 37 and the second component 38 of the gear housing 36. Therefore, if the pinion 35 is driven by the large gear 34, the drive shaft 43 rotates around its axis. In the first component 37 and the second component 38, a bearing 45, such as a sliding bearing, is provided in the hole through which the drive shaft 43 passes. Furthermore, the drive shaft 43 can be formed from a single shaft component or by connecting multiple shaft components. Additionally, the drive shaft 43 may not be rotatably supported by both the first component 37 and the second component 38, or it may be rotatably supported by only one of the first component 37 and the second component 38.

[0036] The impeller 41 is mounted at the front end of the drive shaft 43. That is, the drive shaft 43 connects the impeller 41 to the pinion 35.

[0037] Furthermore, although not shown in the diagram, multiple actuating parts 31 can be provided in the gear housing 36. That is, multiple pinions 35 can mesh with a large gear 34, and impellers 41 can be provided on the drive shaft 43 connected to the multiple pinions 35 respectively. In addition, even in a structure where only one pinion 35 meshes with the large gear 34, impellers 41 can be provided at both ends of the drive shaft 43 connected to the pinion 35. The multiple actuating parts 31 can also be connected in series or in parallel.

[0038] The housing cover 42 is disposed on the back side of the impeller 41 in such a way that a gap is formed between it and the back side of the impeller 41. The housing cover 42 is opposite to the first part 37 of the gear housing 36.

[0039] The housing cover 42 has a hole 42a through which the drive shaft 43 passes. That is, the drive shaft 43 is inserted into the hole 42a of the housing cover 42.

[0040] A housing 44 is mounted on the housing cover 42. The housing 44 is located on the opposite side of the gear housing 36 relative to the housing cover 42, and a space is formed between the housing 44 and the housing cover 42 for the impeller 41 to be disposed. In addition, the housing 44 also has an inlet 49 for gas to flow in.

[0041] The space where the impeller 41 is configured functions as a space to accelerate and pressurize the gas flowing in through the inlet 49. That is, the housing 44 is formed with a vortex tube. In addition, when the actuating part 31 is used to expand the gas, this space functions as a space to depressurize the gas. Furthermore, instead of the inlet 49, an outlet is formed in the housing 44 for the gas to flow out. Alternatively, the housing cover 42 and the housing 44 can be integrally formed (cylindrical housing structure).

[0042] A mounting portion 51 is disposed between the housing cover 42 and the gear housing 36. The mounting portion 51 is provided on a part of the first component 37 of the gear housing 36. That is, the mounting portion 51 is connected to a part of the opposing surface 37a of the first component 37 that faces the housing cover 42. The mounting portion 51 has a rectangular cross-section. In the mounting portion 51, the outer surface facing the first component 37 is formed to be smaller than the opposing surface 37a of the first component 37, and the mounting portion 51 only contacts a part of the opposing surface 37a. Furthermore, the mounting portion 51 is formed to be smaller than the opposing surface 42b of the housing cover 42 that faces the gear housing 36, and only faces a part of the opposing surface 42b. Therefore, except for the mounting portion 51, the housing cover 42 and the gear housing 36 are separated from each other, and a space is formed between the housing cover 42 and the gear housing 36.

[0043] like Figure 2 As shown, the gear housing 36 has an upper part 61 and a lower part 62, which are composed of independently formed components.

[0044] The lower component 62 is located below the upper component 61 in the direction of gravity. The upper component 61 is the part that forms the upper half of each of the first component 37, the second component 38, and the connecting portion 39. The lower component 62 is the part that forms the lower half of each of the first component 37, the second component 38, and the connecting portion 39. The upper component 61 is mounted on the lower component 62, and in this state, the upper component 61 and the lower component 62 are fastened to each other.

[0045] Shaft support portions 63 for cooperating and supporting the shaft of the large gear 34 are provided in the upper component 61 and the lower component 62. The shaft support portion 63 includes an upper support portion 63a located at the lower end of the upper component 61 and a lower support portion 63b located at the upper end of the lower component 62. The shaft of the large gear 34 is clamped between the upper support portion 63a and the lower support portion 63b. Furthermore, in... Figure 2The text indicates that the shaft of the large gear 34 is supported by the shaft support 63 without the end of the shaft protruding from the shaft support 63, so the shaft of the large gear 34 is not visible.

[0046] The drive shaft 43, on which the impeller 41 is mounted, is also supported by the upper component 61 and the lower component 62. That is, the bearing 45 embedded in the drive shaft 43 is held between a recess formed at the lower end of the upper component 61 and a recess formed at the upper end of the lower component 62.

[0047] The mounting part 51 is fixed in the lower part 62 to the portion constituting the first part 37. That is, the mounting part 51 is fixed to the gear housing 36 at a position lower than the drive shaft 43. Since the mounting part 51 is not provided in the upper part 61, the upper part 61 and the housing cover 42 are separated from each other.

[0048] like Figure 2 As shown, the mounting portion 51 is formed in an arc shape centered on the drive shaft 43 (the rotation center axis of the impeller 41) when viewed in the direction in which the drive shaft 43 extends. That is, the mounting portion 51 has a shape that extends along the rotation direction of the drive shaft 43 at a predetermined interval from the drive shaft 43. The arc shape referred to here can be a semi-circular arc or any other arc shape. If the mounting portion 51 is formed in an arc shape centered on the drive shaft 43, the housing cover 42 can be stably supported by the gear housing 36. Furthermore, the mounting portion 51 is not limited to an arc shape; it can also be formed in a ring shape centered on the drive shaft 43 (the rotation center axis of the impeller 41). In this case, the mounting portion 51 is provided across the upper member 61 and the lower member 62. Additionally, multiple arc-shaped mounting portions 51 can be provided for one drive shaft 43. In this case, the multiple mounting portions 51 are preferably arranged symmetrically on the surface including the drive shaft 43.

[0049] In this embodiment, during maintenance of the rotating machinery 30, the upper component 61 of the gear housing 36 can be removed from the lower component 62. At this time, the upper component 61 can be removed while the housing cover 42 is still mounted on the mounting portion 51. Therefore, the mounting portion 51 can be prevented from becoming an obstruction.

[0050] like Figure 1 As shown, a heat insulation member 53 is sandwiched between the mounting portion 51 and the housing cover 42. That is, the heat insulation member 53 is disposed between the opposing surface of the mounting portion 51 and the opposing surface 42b in the housing cover 42. The heat insulation member 53 is a component used to suppress the transfer of heat (high temperature heat or low temperature heat) from the housing cover 42 to the gear housing 36.

[0051] The insulation component 53 can also be a sheet containing a thermosetting resin. Examples of thermosetting resins include phenolic resin, unsaturated polyester resin, diallyl phthalate, and silicone foam. Furthermore, the insulation component 53 can also be constructed from a heat-resistant sheet formed of ceramic. The insulation component 53 can also be a sheet with a vacuum structure.

[0052] The housing cover 42 is attached to the mounting portion 51 by means of bolts 55. Specifically, the housing cover 42 has a through hole 42c through which the bolt 55 is inserted, and the mounting portion 51 has a bolt fastening hole 57 for tightening the bolt 55. The bolt fastening hole 57 is a non-through hole that does not penetrate the mounting portion 51. That is, the bolt fastening hole 57 opens on the housing cover 42 side of the mounting portion 51, but does not reach the gear housing 36 side of the mounting portion 51. Therefore, although there may be heat transfer from the bolt 55 to the mounting portion 51, direct heat transfer from the bolt 55 to the gear housing 36 can be prevented. Furthermore, a plate 58 is disposed in the recess of the housing cover 42. The head of the bolt 55 is covered by this plate 58.

[0053] With the housing 44 not installed on the housing cover 42, the bolt 55 is inserted into the through hole 42c from the housing 44 side of the housing cover 42. Then, the bolt 55 is screwed into the bolt fastening hole 57 of the mounting portion 51, which is in a state where the heat insulation member 53 is sandwiched between the housing cover 42 and the mounting portion 51. Furthermore, the heat insulation member 53 also has a through hole formed in the thickness direction for the bolt 55 to pass through.

[0054] The mounting portion 51 is fixed to the gear housing 36. For example, the mounting portion 51 may also be welded to the gear housing 36, or it may be integrally formed with the gear housing 36 by casting. Alternatively, the mounting portion 51 may be fastened to the gear housing 36 by fasteners. In this case, a through hole (not shown) is formed in the mounting portion 51 instead of a bolt fastening hole 57 which is a non-through hole, and a bolt fastening hole (not shown) is formed in the first component 37 of the gear housing 36. The bolt 55 is screwed into the bolt fastening hole of the first component 37 after being inserted through the through hole 42c of the housing cover 42 and the through hole of the mounting portion 51.

[0055] As explained above, according to this embodiment, a mounting portion 51 is provided on a portion of the opposing surface 37a on the outer side of the gear housing 36, opposite to the housing cover 42. Furthermore, a heat-insulating member 53 is sandwiched between the mounting portion 51 and the housing cover 42. Therefore, the gear housing 36 is less susceptible to heat from the housing cover 42. Moreover, since the mounting portion 51 is formed in an annular or arcuate shape centered on the rotational axis of the impeller 41, the housing cover 42 can be stably supported by the gear housing 36.

[0056] Furthermore, in this embodiment, the bolt fastening hole 57 is formed as a non-through hole that does not penetrate the mounting portion 51. Therefore, heat from the housing cover 42 can be prevented from being directly transferred from the bolt 55 to the gear housing 36.

[0057] (Second Implementation) like Figure 3 As shown, in the second embodiment, the housing cover 42 includes a main body portion 47 having a hole portion 42a, and another mounting portion (second mounting portion 65) protruding from the main body portion 47 toward the mounting portion 51. Furthermore, the same reference numerals are used for the same constituent elements as in the first embodiment, and detailed descriptions thereof are omitted. The mounting portion 51 adjacent to the first component 37 of the gear housing 36 is referred to as the first mounting portion 51.

[0058] The main body 47 is a flat plate-shaped portion within the housing 42. The second mounting portion 65 is positioned corresponding to the first mounting portion 51 and has a shape corresponding to the first mounting portion 51. Therefore, the second mounting portion 65 is also formed to have an annular or arcuate shape centered on the drive shaft 43 (the rotation center axis of the impeller 41) when viewed in the direction in which the drive shaft 43 extends.

[0059] The second mounting portion 65 is provided in the main body portion 47 of the housing cover 42 on the surface opposite to the gear housing 36. The second mounting portion 65 has a protrusion 65a that protrudes from this surface, and a parallel portion 65b that extends from the protrusion 65a in a direction parallel to the first component 37.

[0060] In the first mounting portion 51, a bolt insertion hole (first bolt insertion hole 67) is formed through which a bolt 55 for fixing the housing cover 42 to the gear housing 36 is inserted. In the parallel portion 65b, another bolt insertion hole (second bolt insertion hole 68) is formed through which the bolt 55 is inserted. The first bolt insertion hole 67 is formed so as to penetrate the first mounting portion 51, and the second bolt insertion hole 68 is formed so as to penetrate in the thickness direction of the parallel portion 65b. In addition, the through hole 42c in the main body portion 47 is not required.

[0061] Since the parallel portion 65b of the second mounting portion 65 is separated from the main body portion 47, the bolt 55 can be inserted into the second bolt insertion hole 68 from the side of the main body portion 47 (or, the side of the housing 44, or the side opposite to the first component 37 and the second component 38). Therefore, the bolt 55 can be inserted into the second mounting portion 65 and the first mounting portion 51 from the side of the housing cover 42, and the bolt 55 can be fastened to the bolt fastening hole 69 formed in the first component 37 of the gear housing 36.

[0062] In addition, Figure 3 In, it can also be like Figure 4As shown, in the first mounting portion 51, instead of the bolt insertion hole (first bolt insertion hole 67) through which the bolt 55 is inserted, a bolt fastening hole 57 is formed to tighten the bolt 55. The bolt fastening hole 57 is a non-through hole that does not penetrate the mounting portion 51.

[0063] Furthermore, the second mounting portion 65 is positioned in a location that does not protrude laterally from the housing 44 forming the vortex tube, but is not limited thereto. For example, it can also be as follows: Figure 5 As shown, the second mounting part 65 is provided at a position protruding laterally from the housing 44. Other structures, functions, and effects are omitted from the description, but the description of the first embodiment can be referenced in the second embodiment.

[0064] (Third implementation) like Figure 6 As shown, in the third embodiment, a positioning mechanism 70 is provided for positioning the insulation member 53 relative to the mounting portion 51. Furthermore, the same reference numerals are used for the same components as in the first and second embodiments, and detailed descriptions thereof are omitted here.

[0065] The positioning mechanism 70 functions to position the heat insulation member 53 when the housing cover 42 is installed onto the mounting portion 51, preventing the heat insulation member 53 from shifting position. The mounting portion 51 is, for example, fixed in the first component 37 to a side extending in the vertical direction (the side opposite the housing cover 42). In this case, since the heat insulation member 53 is mounted on the side of the mounting portion 51, the positioning mechanism 70 is provided to prevent the heat insulation member 53 from falling off the mounting portion 51. That is, the positioning mechanism 70 is a mechanism for temporarily fixing the heat insulation member 53 to the mounting portion 51.

[0066] The positioning mechanism 70 can also be composed of bolts such as flat-head threaded members 70a that can fix the insulation member 53 to the mounting portion 51. The flat-head threaded member 70a is inserted into the positioning hole 53a formed in the insulation member 53 and screwed into the fastening hole 71 of the mounting portion 51. At this time, since the head of the flat-head threaded member 70a pushes the insulation member 53 relative to the mounting portion 51, the insulation member 53 can be prevented from shifting position. However, since the head of the flat-head threaded member 70a does not protrude from the insulation member 53, even if the insulation member 53 is clamped between the housing cover 42 (or the second mounting portion 65) and the mounting portion 51, the housing cover 42 (or the second mounting portion 65) and the insulation member 53 can be tightly pressed against each other. Therefore, the fixing of the housing cover 42 relative to the mounting portion 51 is not obstructed by the flat-head threaded member 70a.

[0067] The positioning mechanism 70 may also not be composed of a flat-head threaded part 70a. For example, it may be as follows: Figure 7As shown, the positioning mechanism 70 is composed of a protrusion 70b provided in the mounting portion 51. In this case, an engagement hole 53b is provided in the heat insulation member 53 to engage the protrusion 70b. Therefore, by engaging the engagement hole 53b of the heat insulation member 53 with the protrusion 70b, the heat insulation member 53 can be positioned in a predetermined position, and the heat insulation member 53 can be prevented from shifting position.

[0068] In addition, it can also be like Figure 8 As shown, the positioning mechanism 70 is made of an adhesive 70c that secures the insulation member 53 to the mounting portion 51. That is, the positioning mechanism 70 only needs to be a mechanism that can temporarily fix the insulation member 53 to the mounting portion 51.

[0069] In this embodiment, the heat insulation member 53 can be positioned on the mounting portion 51 by means of the positioning mechanism 70, and the housing cover 42 can be fixed relative to the mounting portion 51 in this state. Therefore, the housing cover 42 can be fixed to the mounting portion 51 without causing the heat insulation member 53 to shift position, thus preventing the operation of installing the housing cover 42 relative to the gear housing 36 from becoming complicated.

[0070] In addition, other structures, functions and effects are omitted from the description, but the descriptions of the first and second embodiments can be referenced in the third embodiment.

[0071] (Other implementation methods) Furthermore, the embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. The present invention is not limited to the foregoing embodiments, and various modifications and improvements can be made without departing from its spirit.

[0072] Explanation of reference numerals in the attached figures 30: Rotating machinery 31: Action Department 32: Transmission mechanism 34: Large Gear 35: Small gear 36: Gear housing 37a: Opposite surface 41: Impeller 42: Shell Cover 42a: Hole 42c: Through hole 43: Drive shaft 44: Shell 47: Main body 51: Installation Department, First Installation Department 53: Insulation components 55: Bolt 57: Bolt fastening hole 61: Upper component 62: Lower component 65: Second Installation Department (Other Installation Departments) 67: Insertion hole for bolt #1 68: Second bolt insertion hole (other bolt insertion holes) 69: Bolt fastening hole 70: Positioning mechanism.

Claims

1. A rotating machine, characterized in that, have: The actuator compresses or expands the gas; and The transmission mechanism transmits power to the aforementioned motion unit; The aforementioned transmission mechanism possesses: Large gear; The small gear meshes with the aforementioned large gear; and Gear housing, which houses the aforementioned large gear and the aforementioned small gear; The aforementioned action unit has: impeller; The housing is configured to form a gap with the back surface of the aforementioned impeller; and The drive shaft is inserted into the hole of the aforementioned housing cover and connects the aforementioned impeller to the aforementioned pinion; The aforementioned rotating machinery also possesses: The mounting part is a portion of the opposing surface on the outer side of the aforementioned gear housing that is opposite to the aforementioned housing cover, and is in the shape of an annular or arc-shaped area centered on the rotation center axis of the aforementioned impeller. as well as The heat insulation component is clamped between the aforementioned mounting portion and the aforementioned housing cover.

2. The rotating machinery as described in claim 1, characterized in that, The aforementioned housing cover has a through hole for inserting bolts to fix the aforementioned housing cover to the aforementioned mounting portion; The aforementioned mounting part has bolt fastening holes for fastening the aforementioned bolts; The aforementioned bolt fastening holes are non-through holes that do not penetrate the aforementioned mounting portion.

3. The rotating machinery as described in claim 1, characterized in that, The aforementioned housing cover includes a main body portion having the aforementioned hole portion, and other mounting portions protruding from the aforementioned main body portion toward the aforementioned mounting portion; The aforementioned insulation component is sandwiched between the aforementioned mounting part and the aforementioned other mounting parts.

4. The rotating machinery as described in claim 3, characterized in that, The aforementioned other mounting parts are provided with additional bolt insertion holes for inserting bolts to secure the aforementioned housing cover to the aforementioned gear housing; The aforementioned mounting part has bolt fastening holes for fastening the aforementioned bolts.

5. The rotating machinery as described in claim 3, characterized in that, The aforementioned mounting part has bolt insertion holes for inserting bolts to fix the aforementioned housing cover to the aforementioned gear housing; The aforementioned other mounting parts have additional bolt insertion holes for inserting the aforementioned bolts; The aforementioned gear housing has bolt fastening holes for fastening the aforementioned bolts.

6. The rotating machinery as described in any one of claims 1 to 5, characterized in that, The aforementioned insulation component is a sheet material containing thermosetting resin.

7. The rotating machinery as described in any one of claims 1 to 5, characterized in that, It also has a positioning mechanism for positioning the aforementioned insulation component relative to the aforementioned mounting part.

8. The rotating machinery as described in any one of claims 1 to 5, characterized in that, The aforementioned gear housing has an upper part and a lower part. The aforementioned lower part is a separate part from the aforementioned upper part and is located on the lower side in the direction of gravity relative to the aforementioned upper part. The aforementioned mounting part is provided on the aforementioned lower component; The aforementioned upper component and the aforementioned housing cover are separated from each other.

9. The rotating machinery as described in any one of claims 1 to 5, characterized in that, The aforementioned rotating machinery is a centrifugal compressor.

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