TWI679348B - Scroll fluid machine - Google Patents

Abstract

The present invention provides a scroll-type fluid machine that, in addition to the orbiting scroll, is also preferably easy to maintain for a fixed scroll. The orbiting scroll 2 is provided with scroll-like orbiting scroll pieces 6 on both sides of the substrate portion 16. The casing 4 is provided with a receiving hole 7 for accommodating the orbiting scroll 6 in a manner capable of orbiting, and is further outside than the receiving hole 7, and the outer peripheral part of the orbiting scroll 2 is circumferentially rotated by the crank shaft 3. Hold more than three places in a way that can be turned around. The fixed scroll 5 is provided with a spiral-shaped fixed scroll piece 50 on one side of the end plate 20. The fixed scroll 5 is detachably provided to the casing 4 so that the fixed scroll 50 and the orbiting scroll 6 mesh with each other to sandwich the orbiting scroll 2.

Description

Scroll fluid machinery

The present invention relates to a scroll-type fluid machine used as a compressor, an expander, a blower, or the like.

As a conventional technique, a scroll type fluid machine disclosed in Patent Document 1 described below is known. This scroll-type fluid machine is provided between the first and second fixed scrolls (2, 3) constituting the casing (1) together with the spacer (4), and an orbiting scroll (21) is provided so as to be able to orbit. ). A support portion (9, 10) of the fixed scroll (2, 3) is provided with an auxiliary crank (11) and a drive shaft (13), which prevent rotation of the orbiting scroll (21), via bearings (14, 14) , 15, 16) is provided in a rotatable manner. In addition, by the drive shaft (13), the orbiting scroll (21) is caused to orbit relative to the fixed scroll (2, 3) with a orbiting radius having a predetermined size (e). By this orbiting motion, the compression chambers (30) between the scroll sheet portions (7, 23) and the compression chambers (31) between the scroll sheet portions (8, 24) are continuously reduced, and one side The air sucked from the suction ports (32, 33) is sequentially compressed in the compression chambers (30, 31), and the compressed air is discharged from the discharge ports (34, 35) to the outside.

The orbiting scroll (21) is composed of the following components: an end plate (22), which is arranged between the end plate portions (22A, 22B) and a plurality of cooling fins (22C, 22C, ...); and a scroll plate portion (23, 24) from the end plate portion of the end plate (22) (22A, 22B) surfaces are set upright; and three protrusions (25, 26, 27) protrude outward from the outer peripheral side of the end plate (22) in the radial direction. In addition, the protrusions (25, 26, 27) are rotatably supported by the crank shafts (11A, 13A) of the auxiliary crank (11, 12) and the drive shaft (13) by orbiting bearings (28, 29), respectively. ), When the drive shaft (13) is rotated, rotation is prevented by the auxiliary cranks (11, 12), and the orbiting motion is performed with a rotation radius of the aforementioned size (e).

(Prior technical literature) (Patent Literature)

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-120552 (Abstract, paragraphs 0013 to 0022)

In the conventional technology, the orbiting scroll is formed at a protruding portion integrally formed on the outer peripheral portion of the end plate, and a bearing hole of the orbiting bearing is formed. Therefore, when performing maintenance on the scroll piece portion of the orbiting scroll, it is necessary to remove the entire orbiting scroll from the crank shaft, and it is necessary to perform the disassembly and assembly work on the bearing portion.

Further, in the conventional technology, the fixed scroll is formed with a bearing hole of a main bearing in a support portion integrally formed on an outer peripheral portion of the end plate. Therefore, when performing maintenance on the scroll piece portion of the fixed scroll, it is necessary to remove the entire fixed scroll from the crank shaft, and it is necessary to perform the disassembly and assembly work on the bearing portion.

Therefore, in the conventional technology, it is not easy to perform replacement of parts, reprocessing, removal of foreign matter, internal cleaning, etc. due to surface treatment, materials, and the like. For example, set on a fixed scroll The tip seal at the front end of the orbiting scroll is a wear part that is worn out due to abutment and sliding. It is necessary to replace it regularly, but the tip seal cannot be easily replaced.

Further, in the conventional technology, as described above, the orbiting scroll is a protrusion formed integrally on the outer peripheral portion of the end plate, and is held on the crank shaft by the orbiting bearing. Such a structure may cause heat from the scroll piece portion to be easily transmitted to the bearing portion, and cause the grease to be depleted in the bearing portion. For example, in the case where a scroll-type fluid machine is used as an expander for water vapor (that is, a steam motor that uses steam to rotate the orbiting scroll to obtain power), the central portion of the orbiting scroll (end plate and The scroll piece portion) is exposed to high-temperature steam, and this heat may be transmitted to the bearing portion, which may cause poor lubrication in the bearing portion. Even when a scroll-type fluid machine is used as a compressor, compression heat may be transmitted to the bearing portion of the orbiting scroll in the same manner, causing a problem. In addition to the above, the thermal expansion of the orbiting scroll will also cause the vibration of the scroll type fluid machine during operation.

On the other hand, with regard to the fixed scroll, there is also a problem that the lubrication of the bearing portion is caused by poor heat transfer from the central portion (end plate and scroll piece portion) of the fixed scroll to the bearing portion of the outer peripheral portion (support portion). Yu.

Therefore, the problem to be solved by the present invention is to provide a scroll-type fluid machine, which can be easily maintained for fixed scrolls in addition to orbiting scrolls.

The present invention is a researcher who solves the aforementioned problems. The invention described in the first aspect is a scroll-type fluid machine including: On both sides of the substrate portion, scroll-shaped orbiting scrolls are provided. The casing has an accommodation hole for accommodating the orbiting scrolls, and the substrate portion is arranged perpendicular to the accommodation. The axis of the hole is held on the outer peripheral portion of the base plate portion by a crank shaft so that the orbiting scroll can be orbited at three or more positions in the circumferential direction; and a pair of fixed scrolls are provided on one side of the end plate. A scroll-shaped fixed scroll sheet is provided in a detachable manner to the casing so that the fixed scroll sheet and the orbiting scroll sheet mesh with each other to sandwich the orbiting scroll.

The invention according to the second aspect is the scroll-type fluid machine according to the first aspect, in the orbiting scroll sheet, an extended front end portion extending from the substrate portion is detachably attached along the aforementioned The orbiting scroll is provided with a tip seal which fills the gap between the end plate of the fixed scroll and the fixed scroll. In the disassembling and mounting method, along the scroll of the fixed scroll, a tip seal for filling the gap between the substrate and the substrate portion of the orbiting scroll is provided.

The invention according to the third aspect is the scroll type fluid machine according to the second aspect, wherein the end scroll of the fixed scroll is provided with a cylindrical outer scroll to surround the fixed scroll. ; In the peripheral scroll sheet, a substrate portion for burying and orbiting the scroll is provided in a detachable manner along the circumferential direction of the peripheral scroll sheet at an extended front end portion extending from the end plate. The gap between the outer seals.

The invention according to the fourth aspect is the scroll type fluid machine according to any one of the first to third aspects. In the casing, a pair of flanges are attached to The middle part of the receiving hole in the axial direction is formed by being partitioned along the axial direction of the receiving hole and extending toward the inside of the receiving hole; the outer peripheral portion of the orbiting scroll is maintained to pass through the opening between the pair of flanges, The crankshaft can be rotated relative to the fixed scroll at an outer side than the receiving hole of the casing; the end plate of the fixed scroll is overlapped with the flange of the casing to be removable. It is fixed; it is provided among three or more crank shafts in the circumferential direction of the casing, and only one of them is provided with a driving force for rotation.

The invention according to the fifth aspect is the scroll-type fluid machine according to any one of the first to fourth aspects, wherein the orbiting scroll includes an orbiting scroll held in the casing by the crank shaft. A base; and orbiting scroll bodies provided on both sides of the central portion of the orbiting scroll base; the orbiting scroll system includes the orbiting scroll sheet, and the orbiting scroll base can be removed Ground setting.

According to the scroll type fluid machine of the present invention, in addition to the orbiting scroll, it is preferable that maintenance can be easily performed also on the fixed scroll.

1‧‧‧Scroll type fluid machinery

2‧‧‧ orbiting scroll

3‧‧‧ crank shaft

3a‧‧‧First Section

3b‧‧‧Second Section

3A‧‧‧Drive crank shaft

3B‧‧‧Driven crankshaft

4‧‧‧chassis

5‧‧‧ fixed scroll

6‧‧‧ Orbiting scroll

7‧‧‧ Containment hole

7A‧‧‧open hole

8‧‧‧eccentric shaft

8a‧‧‧Expansion Department

9‧‧‧ Containment space

10‧‧‧ opening

11‧‧‧ on board

12‧‧‧ lower plate

13‧‧‧Side panel

15‧‧‧ flange

14, 28, 41, 44, 53, 59‧‧‧ bolts

16‧‧‧ Substrate Department

17‧‧‧ Orbiting scroll body

18‧‧‧ Orbiting scroll base

19‧‧‧ receiving hole

20‧‧‧ end plate

21‧‧‧Top seal

22‧‧‧ extension

23‧‧‧ Bolt insertion hole

24, 55‧‧‧ lock pin

25‧‧‧ pin hole

26‧‧‧ Recess

27, 32‧‧‧ screw holes

29‧‧‧revolving bearing

30‧‧‧The first intermediate material

30A‧‧‧Insulation

30B‧‧‧ spacer

31‧‧‧headless screw (supporting material)

33‧‧‧bearing hole

33a‧‧‧large diameter hole

33b‧‧‧Small diameter hole

34‧‧‧ (upper) main shaft

35‧‧‧ (bottom) main shaft

35a‧‧‧large diameter section

35b‧‧‧Middle diameter section

35c‧‧‧ Trail

36‧‧‧ Upper bearing

37‧‧‧ lower bearing

38, 39‧‧‧ shaft mounting holes

38a, 39a ‧‧‧ small diameter hole

38b, 39b‧‧‧large diameter hole

40‧‧‧ retaining ring

42‧‧‧First fixing nut

43‧‧‧bearing shell

45‧‧‧Rotating synchronization mechanism

46‧‧‧ timing belt

47‧‧‧Belt Gear

48‧‧‧ tension roller

49‧‧‧ counterweight balancer

50‧‧‧ fixed scroll

51‧‧‧Top seal

52‧‧‧ Peripheral scroll

52A‧‧‧External Seal

54‧‧‧Second intermediate material

56‧‧‧Second fixing nut

57‧‧‧Pushing material

58‧‧‧Fixed ring

60‧‧‧First opening

61‧‧‧Second opening

62, 63‧‧‧ opening

X‧‧‧ The gap between the outer ring of the orbiting bearing and the bearing hole of the orbiting scroll

Y‧‧‧ The gap between the side of the fixed scroll and the side of the orbiting scroll

FIG. 1 is a schematic bottom view of a scroll type fluid machine according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along the line II-II in Fig. 1.

FIG. 3 is an exploded perspective view of the orbiting scroll of the scroll type fluid machine of FIG. 1.

FIG. 4 is an enlarged view of the left end portion of FIG. 2.

Hereinafter, specific embodiments of the present invention will be described in detail based on the drawings.

1 to 4 are schematic diagrams showing a scroll type fluid machine 1 according to an embodiment of the present invention. FIG. 1 is a bottom view, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is An exploded perspective view of the orbiting scroll 2 and FIG. 4 are enlarged views of the left end portion of FIG. 2. In addition, in the following description, for the convenience of explanation, the top and bottom of the second figure (the second figure is the II-II sectional view of the first figure, so strictly speaking, it is the left half or the right half) The directions are described with left and right, but this direction is not intended to limit the swing direction of the scroll-type fluid machine 1. Therefore, when the scroll-type fluid machine 1 is used, in addition to the crank shaft 3 being arranged in the vertical direction, it may be arranged in the left-right direction, for example.

The scroll-type fluid machine 1 of this embodiment is provided with: a casing 4; an orbiting scroll 2, which is held in the casing 4 through a plurality of crank shafts 3 in a rotatable manner; and a pair of fixed scrolls 5. It is detachably fixed to the casing 4 by sandwiching the orbiting scroll 2. In addition, the crank shaft 3 is provided at least two places, preferably three or more places, in the outer peripheral portion of the orbiting scroll 2. In this embodiment, the crank shaft 3 is provided at three places at equal intervals in the circumferential direction of the outer peripheral portion of the orbiting scroll 2.

In the present embodiment, the casing 4 is formed in a substantially rectangular box shape, and in a plan view, the orbiting scroll piece 6 accommodating the orbiting scroll 2 is formed in the central part so as to penetrate up and down. Of the receiving hole 7. In the casing 4, the crank shafts 3 are provided at a plurality of positions in the circumferential direction surrounding the accommodation holes 7, and are arranged parallel to the axis of the accommodation holes 7, and the eccentric shaft portions 8 of the crank shafts 3 The receiving space 9 is connected to the receiving hole 7 through the opening 10.

Specifically, the cabinet 4 of this embodiment is provided with a substantially rectangular flat plate-shaped upper plate 11 and a lower plate 12, and the upper plate 11 and the lower plate 12 are formed to have sizes corresponding to each other. In addition, the upper plate 11 and the lower plate 12 are vertically separated from each other and are arranged in parallel to each other, and are connected to each other's outer edges by appropriate side plates 13. At this time, the upper plate 11 and the lower plate 12 may be connected to the lower surface of the upper plate 11 and the upper surface of the lower plate 12 by a side plate 13 as shown in the front and rear end edges of FIG. 1 (that is, the right side of FIG. 2). The end faces of the upper plate 11 and the end faces of the lower plate 12 may be connected by the side plate 13 as shown on the left and right end edges in FIG. 1 (that is, on the left side in FIG. 2). In addition, each side plate 13 may be provided on the entire end of the upper plate 11 and the lower plate 12 as shown on the right side plate 13 in FIG. 1, or may be provided on the upper side as shown in the left side plate 13 in FIG. 1. Part of the edges of the plate 11 and the lower plate 12. Each of the plates 11 to 13 is detachably assembled using bolts 14, whereby the upper plate 11 can be removed from each of the side plates 13, for example. In addition, the bolt 14 is not limited to the literal bolt, and various screws may be used. The same applies to other bolts described later.

In the upper plate 11 and the lower plate 12, opening holes 7A are formed at corresponding positions penetratingly formed as openings of the receiving holes 7 (in other words, openings of hollow portions in the housing 4). The upper and lower opening holes 7A are formed with circular holes of the same size. In the example shown in the figure, the peripheral scroll sheet of the upper opening hole 7A projects more downward than the lower surface of the upper plate 11, and the peripheral scroll sheet of the lower opening hole 7A projects more upward than the upper surface of the lower plate 12. .

An annular flange 15 is formed at the bottom of each of the opening holes 7A. Specifically, the lower end portion of the peripheral scroll of the upper opening hole 7A is A flange 15 is provided to extend inward in the radial direction. On the other hand, a flange 15 is provided to extend inward in the upper end portion of the peripheral scroll of the lower opening hole 7A. A ring-shaped hollow portion is formed in the casing 4 radially outward than each flange 15. The hollow portion serves as a storage space 9 for receiving the eccentric shaft portion 8 of the crank shaft 3. In addition, the storage space 9 is continuously opened in the circumferential direction to the storage hole 7 through the opening portion 10 between the pair of flanges 15 (a hollow portion that virtually connects the upper and lower opening holes 7A and the two holes). .

As shown in FIG. 2 and FIG. 3, the orbiting scroll 2 is attached to the center of the orbiting scroll body 17 so that it can be detached from one side (here, the upper surface) of the orbiting scroll base 18. The orbiting scroll body 17 is constituted by a receiving hole 19. The orbiting scroll body 17 is formed by providing scroll-shaped orbiting scroll pieces 6 on both sides of the substrate portion 16.

The orbiting scroll main body 17 is formed on the upper and lower surfaces of the disc-shaped substrate portion 16 and is provided with one or a plurality of plate-like orbiting scroll pieces 6 extending perpendicular to the surfaces. Specifically, the orbiting scroll 6 is provided on the upper surface of the substrate portion 16 and the orbiting scroll 6 is provided on the lower surface of the substrate portion 16. At this time, each of the orbiting scroll pieces 6 is formed in a spiral shape of an involute curve bent from the center portion of the substrate portion 16 to the outer peripheral portion. In this embodiment, as shown in FIG. 2, the upper and lower orbiting scrolls 6 are formed in shapes, sizes, and arrangements corresponding to each other.

As shown in FIG. 2, in each of the orbiting orbiting scrolls 6, at the extended front end portion (the upper end of the orbiting orbiting scroll 6 on the upper side, or Lower end), in a detachable manner, along The scroll is provided with a tip seal 21 for filling the gap between the orbiting scroll 6 and the end plate 20 of the fixed scroll 5. In addition, in FIG. 3, the tip seal 21 is omitted.

As shown in FIG. 3, the outer peripheral portion of the substrate portion 16 is provided with a plurality of extension pieces 22 extending outward in the radial direction at a plurality of points in the circumferential direction. In this embodiment, a pair of extension pieces 22 arranged adjacent to each other is used as a group, and a plurality of arrays are arranged at equal intervals in the circumferential direction. Specifically, three pairs of extension pieces 22 are integrally formed on the outer peripheral portion of the substrate portion 16 at intervals of 120 degrees.

Each extension piece 22 is formed in a plate shape whose upper surface is continuous with the substrate portion 16 and is formed to be slightly thinner than the substrate portion 16 as shown on the right side in FIG. 2. In addition, as shown in FIG. 3, two bolt insertion holes 23 are formed in the plate surface of each extension piece 22 so as to penetrate up and down in the circumferential direction of the substrate portion 16. In addition, a pin hole 25 into which a lock pin 24 to be described later is fitted is formed in the two extension pieces 22 with respect to the substantially radial direction of the substrate portion 16.

The orbiting scroll base 18 may be, for example, a substantially circular shape in a plan view, but in this embodiment, it is formed into a substantially triangular shape as shown in FIG. 3. Regardless of the shape, an accommodation hole 19 is formed in the central portion of the orbiting scroll base 18 so as to penetrate through the base portion 16 of the orbiting scroll body 17.

As described later, when preventing heat transfer from the orbiting scroll main body 17 to the orbiting scroll base 18, the inner diameter of the receiving hole 19 is larger than the outer diameter of the substrate portion 16 by a set size. At this time, in the accommodating hole 19 of the orbiting scroll base 18, the substrate portion 16 of the orbiting scroll body 17 is provided with a gap between the outer peripheral surface of the substrate portion 16 and the inner peripheral surface of the accommodating hole 19. Embedded.

In the orbiting scroll base 18, a recess 26 is formed in the periphery of the accommodating hole 19 so that the inner scroll piece of the accommodating hole 19 forms a notch and is opened upward to accommodate the extending piece 22 of the orbiting scroll body 17. . The bottom surface of the recessed portion 26 is arranged at the central portion in the axial direction of the accommodation hole 19. When inserting the extension piece 22 of the orbiting scroll body 17 into the recess 26 of the orbiting scroll base 18, the substrate portion 16 of the orbiting scroll body 17 can also be embedded in the accommodation of the orbiting scroll base 18. Hole 19.

A screw hole 27 is formed on the bottom surface of each recessed portion 26 of the orbiting scroll base 18 corresponding to the bolt insertion hole 23 formed in the extension piece 22 of the orbiting scroll body 17. In addition, at two places in the approximate radial direction with respect to the accommodation hole 19, a lock pin 24 is provided protruding upward from the bottom surface of the recessed portion 26. Therefore, by inserting the pin hole 25 of the extension piece 22 of the orbiting scroll body 17 into the lock pin 24 of the recess 26 of the orbiting scroll base 18, the orbiting scroll body 17 can be obtained with respect to the orbiting scroll. The roll base 18 is positioned in the circumferential direction. In addition, the bolt 28 is locked into the screw hole 27 of the recess 26 through the bolt insertion hole 23 of the extension piece 22, so that the orbiting scroll body 17 can be detachably fixed to the orbiting scroll base. 18. Among them, the lock pin 24 and the pin hole 25 can be omitted as appropriate.

In order to hold the orbiting scroll base 18 to the eccentric shaft portion 8 of the crank shaft 3, orbiting bearings 29 are provided at the three corners of the orbiting scroll base 18 (see FIG. 2). Details will be described later. . In order to protect the orbiting bearing 29 (more specifically, to prevent the grease from running out), it is preferable to prevent heat transfer from the orbiting scroll body 17 to the orbiting scroll base 18. For this reason, as shown in FIG. 3, it is preferable that the orbiting scroll body 17 and the orbiting scroll base 18 are interposed therebetween. An intermediate material 30 overlaps without direct contact.

In this embodiment, a washer-shaped intermediate member 30 is interposed between the lower surface of the extension piece 22 and the bottom surface of the recessed portion 26. That is, the bolts 28 for fixing the orbiting scroll body 17 to the orbiting scroll base 18 are after the bolt insertion holes 23 and the holes of the intermediate material 30 through the extension piece 22 of the orbiting scroll body 17. Lock into the screw hole 27 of the orbiting scroll base 18.

In the example shown in the figure, the orbiting scroll body 17 is fixed to the orbiting scroll base 18 with twelve bolts 28. Among them, half of the intermediate material 30 is made of heat insulation material 30A, and the remaining half The intermediate material 30 is a spacer 30B. Specifically, a pair of recessed portions 26 arranged in correspondence with each corner portion of the orbiting scroll base 18 in a substantially triangular shape and a pair of extension pieces 22 attached to the pair of recessed portions 26 are, for example, spacers. 30B, the heat insulating material 30A, the heat insulating material 30A, and the spacer 30B are provided in the order of the intermediate material 30 along the circumferential direction of the accommodation hole 19.

In addition, in this embodiment, the heat-insulating material 30A and the spacer 30B are both approximately the same shape and size, but may be different shapes and sizes depending on circumstances. By using the spacer 30B corresponding to the thickness and hardness of the heat insulating material 30A, the material of the heat insulating material 30A can be easily selected. In addition, when the spacer 30B is formed of a metal material as described later, the thickness accuracy can be easily ensured, and deformation due to the locking force of the bolt 28 can be suppressed. By sandwiching not only the heat insulating material 30A but also the metal spacer 30B between the recessed portion 26 and the extension piece 22, the installation height of the orbiting scroll body 17 with respect to the orbiting scroll base 18 can be maintained. At a predetermined height, therefore, the up-and-down arrangement of the orbiting scroll 2 and the fixed scroll 5 is fixed at a predetermined arrangement. It can suppress the fluctuation of the clearance between the top seals 21 and 51 after assembly, and can prevent the leakage of fluid.

In any case, the intermediate material 30 is made of a material having a lower thermal conductivity than the orbiting scroll base 18. From this point of view, even in the case where the aforementioned spacer 30B is used as the intermediate material 30, the spacer 30B functions as a heat insulating material. In this embodiment, the orbiting scroll body 17 and the orbiting scroll base 18 are formed of a lightweight aluminum alloy, and the intermediate material 30 is, for example, a ceramic or synthetic resin heat insulation material 30A, or stainless steel. Systems of spacers 30B. In addition, as described above, in the receiving hole 19 of the orbiting scroll base 18, a gap is left between the substrate portion 16 of the orbiting scroll body 17 and the outer peripheral surface of the substrate portion 16 and the inner peripheral surface of the receiving hole 19. Way to embed. In addition, the recessed portion 26 of the orbiting scroll base 18 and the extending piece 22 of the orbiting scroll body 17 not only do not directly contact the bottom surface of the recessed portion 26 and the lower surface of the extending piece 22 with the intermediate member 30 therebetween, but also the recessed portion 26 It is formed slightly larger than the extension piece 22 so that the side surface of the recessed portion 26 and the outer edge of the extension piece 22 are not in direct contact. In addition, in addition to the bolts 28 used to fix the orbiting scroll body 17 to the orbiting scroll base 18, it is preferable that the locking pin 24 also has a lower thermal conductivity than the orbiting scroll base 18 (aluminum alloy). Made of stainless steel (here stainless steel). In this way, heat transfer from the orbiting scroll body 17 to the orbiting scroll base 18 can be prevented, and the orbiting bearing 29 can be protected.

In addition, when the substrate portion 16 of the orbiting scroll body 17 is fitted into the receiving hole 19 of the orbiting scroll base 18 with a gap, it is preferable to perform the orbiting scroll body 17 with respect to The orbiting scroll base 18 is positioned in the radial direction. That is, on the peripheral side wall of the receiving hole 19, it is preferable that A support member (31) having a front end portion protruding into the accommodation hole 19 is provided at three or more positions in the circumferential direction at equal intervals in the circumferential direction. In this embodiment, a substantially triangular orbiting scroll base 18 is attached to each central portion of the three ends, and a screw hole 32 is formed in the radial direction, and a headless screw 31 as a supporting material is locked in the screw hole 32. (E.g. Hexagon socket set screws). In addition, the front end portion of the headless screw 31 protrudes inward from the peripheral side wall of the receiving hole 19. By holding (holding) the substrate portion 16 by abutting the front end portion of the headless screw 31 against the outer peripheral portion of the substrate portion 16 of the orbiting scroll body 17, the substrate portion 16 can be made to be radially with respect to the accommodation hole 19. Its positioning. By advancing the headless screw 31 into the screw hole 32, the position of the substrate portion 16 relative to the receiving hole 19 can be adjusted. In addition, the headless screw 31 may be fixed to the orbiting scroll base 18 using an adhesive as desired. After the position of the base plate portion 16 with respect to the receiving hole 19 is determined by the headless screw 31, the position of the headless screw 31 is fixed, but the vortex can be orbited along the axial direction (the direction perpendicular to the plate surface of the base plate portion 16). The roll body 17 is detachable from the orbiting scroll base 18. In order to prevent heat transfer from the orbiting scroll body 17 to the orbiting scroll base 18, it is preferable that the headless screw 31 is also formed of a material having a lower thermal conductivity than the orbiting scroll base 18. In this embodiment, Made of stainless steel. In addition, when it adopts such a structure, the lock pin 24 and the pin hole 25 mentioned above are comprised so that it may fit in a loose fit.

Bearing holes 33 of the crankshaft 3 are formed in the outer peripheral portion of the orbiting scroll base 18 at three equally spaced intervals in the circumferential direction. In the present embodiment, the orbiting scroll base 18 is formed into a substantially triangular shape in a plan view, and the three corner portions thereof penetrate up and down to form a bearing hole 33. Each bearing hole 33 is formed as a stepped hole, and a large-diameter hole 33a is arranged in the upper part and a small-diameter hole 33b is arranged in the lower part.

The orbiting scroll 2 is a state in which the orbiting scroll 6 is arranged in the receiving hole 7 of the casing 4, and the substrate portion 16 and the orbiting scroll base 18 are arranged perpendicular to the axis of the receiving hole 7. At this time, the orbiting scroll base 18 extends through the opening portion 10 between the flanges 15 of the cabinet 4 to the outside of the accommodation hole 7. Thereby, each bearing hole 33 of the orbiting scroll base 18 is arrange | positioned outside of the flange 15 of the housing 4 in a radial direction. The orbiting scroll 2 is held on the crank shaft 3 via an orbiting bearing 29 mounted in a bearing hole 33. The holding structure will be described later. In addition, as shown in FIG. 1, the crank shafts 3 are provided at three places at equal intervals in the circumferential direction of the casing 4. In this embodiment, the structures are the same as each other. In addition, as shown in FIG. 2, each of the crank shafts 3 is arranged along its axis in the vertical direction. At this time, each of the crank shafts 3 is provided so as to penetrate the hollow portion of the casing 4 above and below.

As shown in FIG. 2 (especially the left side) and FIG. 4, each crank shaft 3 is eccentrically provided with the eccentric shaft portion 8 between the main shaft portions 34 and 35 arranged on the same axis. In this embodiment, the main shaft portion 35 on the lower side is reduced in diameter step by step and divided into a large diameter portion 35a, a middle diameter portion 35b, and a small diameter portion 35c. The lower end portion of the eccentric shaft portion 8 is formed concentrically with an enlarged diameter portion 8a.

Each of the crank shafts 3 is rotatably held on the upper plate 11 and the lower plate 12 of the casing 4 by sandwiching the main shaft portions 34 and 35 on both sides of the eccentric shaft portion 8. In this embodiment, the upper spindle portion 34 is rotatably held by the upper plate 11 of the casing 4 by an upper bearing 36, and the lower diameter portion 35b of the lower spindle portion 35 is freely rotated by a lower bearing 37 The ground is held on the lower plate 12 of the cabinet 4.

In each crank shaft 3, the main shafts on both sides of the eccentric shaft portion 8 are sandwiched. One of the main shaft portions (the main shaft portion on the lower side in the second figure) 35 of one of the portions 34 and 35 is provided with a first stage portion 3 a in the axial direction. Specifically, the lower main shaft portion 35 is formed in a rod shape having a step as described above, and a step portion (the lower surface of the large diameter portion 35a) between the large diameter portion 35a and the middle diameter portion 35b is used as the first step portion 3a. The upper end surface of the inner ring of the lower bearing 37 is in contact with the first stage portion 3a.

In each of the crank shafts 3, a second step portion 3b is provided at one end portion (lower end portion in the second figure) in the axial direction of the eccentric shaft portion 8. Specifically, as described above, the eccentric shaft portion 8 is provided with the enlarged diameter portion 8a at the lower end portion, and the stepped portion (upper diameter of the enlarged diameter portion 8a) from the enlarged diameter portion 8a is used as the second step portion 3b. The lower end surface of the inner ring of the orbiting bearing 29 is in contact with the second stage portion 3b. In addition, the orbiting bearing 29 provided on the eccentric shaft portion 8 may be a single or a plurality of, and when there are a plurality of orbiting bearings, the lower end face of the inner ring of the orbiting bearing 29 arranged at the lowermost portion abuts on the Second section 3b. In the example shown in the figure, two orbiting bearings 29 are arranged on the eccentric shaft portion 8 so as to overlap each other.

Shaft mounting holes 38 and 39 are formed in the upper plate 11 and the lower plate 12 of the cabinet 4 at three positions in the circumferential direction corresponding to the installation position of the crank shaft 3. The shaft mounting hole 38 of the upper plate 11 of the cabinet 4 is formed as a stepped hole, a small diameter hole 38a is formed below, and a large diameter hole 38b is formed above. The shaft mounting hole 39 of the lower plate 12 of the casing 4 is also formed as a stepped hole, a small diameter hole 39a is formed above, and a large diameter hole 39b is formed below.

In this embodiment, the upper bearing 36 and the lower bearing 37 are each constituted by a roller bearing. As is well known, a roller bearing is formed between a generally cylindrical inner ring and an outer ring arranged in a concentric circle shape, and a plurality of rolling elements are arranged and held in the circumferential direction. As a result, the inner ring and the outer ring of the roller bearing are separated by a roller. The moving parts can rotate freely. In addition, in this embodiment, each of the orbiting bearings 29 provided in the eccentric shaft portion 8 has the same configuration as the upper bearing 36 and the lower bearing 37.

The fixing system of the lower bearing 37 to the lower plate 12 of the cabinet 4 is performed as follows. That is, the outer ring of the lower bearing 37 is pressed into the large-diameter hole 39 b until the upper end surface of the outer ring abuts the small-diameter hole 39 a and the large-diameter hole 39 b (large-diameter hole) of the shaft mounting hole 39 of the lower plate 12. 39b above). Next, the ring-shaped fixing ring 40 is superposed on the lower surface of the lower plate 12 and fixed with bolts 41. Thereby, the lower bearing 37 is fixed because the outer ring is sandwiched between the stepped portion of the shaft mounting hole 39 and the fixing ring 40.

A middle diameter portion 35 b of the lower spindle portion 35 is press-fitted into the inner ring of the lower bearing 37. That is, the middle diameter portion 35b of the main shaft portion 35 is pressed into the inner ring of the lower bearing 37 until the upper end surface of the inner ring of the lower bearing 37 abuts against the first stage portion 3a. Next, since the lower end portion of the middle-diameter portion 35b is formed as a threaded portion, the first fixed nut 42 is locked in the threaded portion. Thereby, the lower bearing 37 is fixed because the inner ring is sandwiched between the first section portion 3 a and the fixing nut 42.

The upper bearing 36 is fixed to the upper plate 11 of the cabinet 4 as follows. That is, the outer ring of the upper bearing 36 is held in the bearing housing 43, and the bearing housing 43 is fitted into the large-diameter hole 38 b until the lower end surface of the flange of the bearing housing 43 abuts the upper surface of the upper plate 11. Next, the flange of the bearing housing 43 is fixed to the upper surface of the upper plate 11 with bolts 44. On the other hand, the upper spindle portion 34 is press-fitted into the inner ring of the upper bearing 36.

The three crank shafts 3 integrate the positions of the eccentric shaft portions 8 (that is, integrate the phases), and rotate synchronously by rotating the synchronization mechanism 45. The rotation synchronization mechanism 45 can use gears, but in this embodiment, a timing belt is used. 46. Specifically, a belt gear 47 is fixed to a main shaft portion 35 (small diameter portion 35 c) below each crank shaft 3, and a timing belt 46 is wound around the belt gears 47. At this time, as shown in FIG. 1, the timing belt 46 is also wound around the tension roller 48, and the timing belt can be adjusted by adjusting the position of the tension roller 48 (the position relative to the radial direction of the receiving hole 7). 46 tension.

In addition, one of the three crank shafts 3 (in this embodiment, the crank shaft at the bottom right of FIG. 1) is used as a drive crank shaft 3A that receives power input from the outside (or outputs recovered power to the outside), and the rest The two are used as driven crank shafts 3B that do not directly perform the above-mentioned input (or output). In the case where the scroll-type fluid machine 1 is used as a compressor or a blower, power is supplied from the outside to drive the crank shaft 3A (that is, power input is obtained), and the driven crank is rotated through the rotation synchronization mechanism 45 along with the power input. The shaft 3B also rotates, while orbiting the orbiting scroll 2; on the other hand, in the case of the scroll type fluid machine 1 as an expander, the orbiting scroll 2 is orbited by the supplied fluid, and the rotation The synchronizing mechanism 45 rotates each of the crank shafts 3 and gives the recovered power to the driving crank shaft 3A (that is, the output power). The details will be described later.

In order to smoothly rotate around the orbiting scroll 2, a weight balancer 49 is provided on each of the crank shafts 3. In this embodiment, a weight balancer 49 is provided on the lower end portion of the upper spindle portion 34 and the upper end portion of the large-diameter portion 35 a of the lower spindle portion 35.

Each fixed scroll 5 is attached to one surface of a disk-shaped end plate 20, and one or a plurality of plate-shaped fixed scroll pieces 50 are provided perpendicular to the plate surface. Specifically, in FIG. 2, the upper fixed scroll 5 is attached to the end plate 20. The fixed scroll sheet 50 is provided downwardly, and the fixed scroll sheet 5 of the lower side is provided with the fixed scroll sheet 50 facing upward from the upper surface of the end plate 20. At this time, the fixed scrolls 50 are formed in a number, shape, and size corresponding to the orbiting scrolls 6 and are formed into an involute spiral shape bent from the central portion of the end plate 20 to the outer peripheral portion. . In each of the fixed scroll pieces 50, an extended front end portion (a lower end portion of the upper fixed scroll piece 50 and an upper end portion of the lower fixed scroll piece 50) extending from the end plate 20 is detachable. A tip seal 51 is provided along the scroll to fill the gap between the fixed scroll sheet 50 and the substrate portion 16 of the orbiting scroll 2.

A cylindrical outer scroll piece 52 is provided in each fixed scroll 5 so as to surround the fixed scroll piece 50. Specifically, in the second figure, the fixed scroll 5 on the upper side is provided with an outer peripheral scroll piece 52 directed downward from the lower surface of the end plate 20, and the fixed scroll 5 on the lower side is provided with an outer periphery directed upward from the upper surface of the end plate 20. Scroll sheet 52. The height (extended dimension from the end plate 20) of the outer scroll piece 52 corresponds approximately to the height (extended dimension from the end plate 20) of the fixed scroll piece 50. Each outer scroll piece 52 is attached to an extended front end portion (the lower end portion of the upper outer scroll piece 52 and the upper end portion of the lower outer scroll piece 52) extending from the end plate 20 so as to be detachable. One or more annular outer seals 52A are provided along the circumferential direction.

Each of the fixed scrolls 5 is provided in a state in which the fixed scroll 50 and the orbiting scroll 6 are engaged with each other so as to be detachable from the upper and lower sides of the casing 4. Specifically, the outer peripheral portion of the upper fixed scroll 5 system end plate 20 is superposed on the upper surface of the flange 15 on the upper side of the casing 4 and is detachably fixed by bolts 53. In addition, the lower fixed scroll 5 series end plate 20 The outer peripheral portion is superposed on the lower surface of the flange 15 on the lower side of the cabinet 4 and is detachably fixed by a bolt 53. In addition, the flange 15 of the casing 4 is provided with a plurality of locking pins 55 at a plurality of positions in the circumferential direction, and the locking pins 55 are fitted into the pin holes provided in the end plate 20 of the fixed scroll 5, and the fixed scroll 5 The positioning of the casing 4 in the circumferential direction.

As for the fixed scroll 5, in the same manner as the orbiting scroll 2, in order to protect the upper bearing 36 and the lower bearing 37 provided in the casing 4 (more specifically, to prevent the grease from being depleted) to prevent from the fixed scroll The heat transfer from the coil 5 to the casing 4 is preferred. For this reason, as shown in FIG. 2 and FIG. 4, it is preferable that the fixed scroll 5 and the casing 4 overlap without directly contacting each other through the second intermediate member 54.

Specifically, it suffices that the flange 15 of the casing 4 and the end plate 20 of the fixed scroll 5 overlap with the intermediate member 54. The intermediate material 54 may be a washer shape through which bolts 53 for fixing the end plate 20 of the fixed scroll 5 to the flange 15 of the cabinet 4 may pass, or may be a circumferential direction of the flange 15 overlapping the cabinet 4. The overall ring shape. In addition, as in the case of the orbiting scroll 2, the intermediate material 54 can be combined with a heat insulating material and a spacer. Regardless of the method, the intermediate material 54 is formed of a material having a lower thermal conductivity than the casing 4.

In addition, in the opening hole 7A of the cabinet 4, the end plate 20 of the fixed scroll 5 is fitted so as to leave a gap between the inner peripheral surface of the opening hole 7A and the outer peripheral surface of the end plate 20. In addition, at the flange 15 of the casing 4, the outer scroll sheet 52 of the fixed scroll 5 is also inserted so as to leave a gap between the inner peripheral surface of the flange 15 and the outer peripheral surface of the outer scroll sheet 52. . In addition, in addition to the bolts 53 used to fix the fixed scroll 5 to the casing 4, it is preferable that the locking pin 55 is also made of a material having a lower thermal conductivity than the casing 4 (here, stainless steel is used) form. In this way, heat transmission from the fixed scroll 5 to the casing 4 can be prevented, and the upper bearing 36 and the lower bearing 37 can be protected.

Next, a holding structure of the eccentric shaft portion 8 that holds the orbiting scroll 2 on the crank shaft 3 will be described with reference to FIGS. 2 and 4. The inner ring of the orbiting bearing 29 is press-fitted and fixed to the eccentric shaft portion 8 of the crank shaft 3. In this embodiment, two orbiting bearings 29 overlap each other and are pressed into the eccentric shaft portion 8. At this time, the lower end surface of the inner ring of the lower orbiting bearing 29 is in contact with the second stage portion 3b. Next, since the upper end portion of the eccentric shaft portion 8 is formed as a threaded portion, the second fixed nut 56 is locked in the threaded portion. Thereby, the orbiting bearing 29 is fixed because the inner ring is tightly clamped between the second section portion 3b and the fixing nut 56a.

On the other hand, a slight gap is left between the outer ring of the orbiting bearing 29 and the bearing hole 33 (large-diameter hole 33a) of the orbiting scroll 2, and a ring-shaped pressing member 57 is provided in the gap. . The pressing material 57 may be an elastic ring (such as an O-ring) or an inelastic ring (such as a resin ring made of engineering plastic). In addition, if the pressing material 57 is formed of a material having a lower thermal conductivity than the orbiting scroll base 18, it is also helpful to prevent heat transfer from the orbiting scroll base 18 to the orbiting bearing 29.

More specifically, the large-diameter hole 33 a of the bearing hole 33 of the orbiting scroll base 18 is formed to have a larger diameter than the outer ring of the orbiting bearing 29 by a set size. Further, in the present embodiment, an installation groove is formed in the outer peripheral surface of the outer ring of the revolving bearing 29 so as to fit the inner peripheral portion of the pressing member 57 along the circumferential direction. In addition, the ring-shaped pressing member 57 is fitted into the mounting groove of the outer ring at the inner peripheral portion, and is fitted into the bearing hole 33 of the orbiting scroll base 18. However, the above The configuration is such that a mounting groove is provided on the inner peripheral surface of the bearing hole 33. The annular pressing member 57 is fitted into the mounting groove of the bearing hole 33 and the inner circumferential portion is fitted into the outer ring of the revolving bearing 29. Regardless of the method, the ring-shaped pressing member 57 is disposed between the outer ring of the orbiting bearing 29 and the bearing hole 33 of the orbiting scroll base 18. In addition, in this embodiment, each orbiting bearing 29 is attached to two places above and below the outer peripheral surface of the outer ring, and is held in the bearing hole 33 via a ring-shaped pressing member 57.

In addition, on the orbiting scroll base 18, the fixing ring 58 is fixed to the upper surface of the peripheral wall of the bearing hole 33 with a bolt 59. It is preferable that the fixed ring 58 allows movement in the radial direction of the orbiting scroll 2 relative to the outer ring, but restricts movement in the axial direction.

As far as the eccentric shaft portion 8 is arranged to rotate concentrically with the bearing hole 33, in this embodiment, the gap between the outer peripheral surface of the outer ring of the bearing 29 and the inner peripheral surface of the large-diameter hole 33a of the bearing hole 33 (Single side) X is set to the minimum setting value (in the closest state) of the gap (gap in the radial direction of the scroll) Y between the side of the fixed scroll 50 and the side of the orbiting scroll 6 The design gap between the two scroll pieces 50, 6) is small, for example, it is set to approximately half of the aforementioned minimum set value (for example, 20 μm to 30 μm). At this time, even if the orbiting scroll 2 deflects relative to the eccentric shaft portion 8 due to the centrifugal force, the aforementioned gap X collapses and the orbiting scroll 6 will collide with the fixed scroll 50 due to the bearing hole 33 The inner peripheral surface of the large-diameter hole 33a first hits the outer peripheral surface of the outer ring of the revolving bearing 29, so that damage due to the collision between the two scroll pieces 50 and 6 can be prevented. Furthermore, the gap X can be prevented from collapsing by pressing the material 57. Even if the gap X is collapsed, it can be collapsed slowly.

As described above, the gap between the outer peripheral surface of the orbiting bearing 29 and the inner peripheral surface of the large-diameter hole 33 a is maintained by the annular pressing member 57. Thereby, the gap between the outer ring of the orbiting bearing 29 and the bearing hole 33 of the orbiting scroll 2 is filled with the pressing material 57, and when the pressing material 57 is elastically deformable, the gap can be adjusted .

As shown in FIGS. 1 and 2, the pair of fixed scrolls 5 are provided with a first opening 60 on the outer peripheral side and a second opening 61 on the central portion. In addition, tubular openings 62 and 63 are attached to the first opening 60 and the second opening 61. In addition, in the second figure, the second opening 61 shown in the upper and lower places may be opened with a through hole in the center of the base plate portion 16 of the orbiting scroll 2 so that the two openings communicate with each other.

The assembly of the scroll type fluid machine 1 of the present embodiment is preferably performed as follows. That is, first, the lower bearing 37 is mounted to the lower plate 12. On the other hand, each crank shaft 3 is first mounted to the orbiting scroll 2 via the orbiting bearing 29 and the pressing member 57. Next, each crank shaft 3 of the orbiting scroll 2 is fitted into the lower bearing 37 of the lower plate 12 and is attached. At this time, each of the crank shafts 3 is mounted in a predetermined swing direction (that is, in a state where there is no phase difference in which the positions of the eccentric shaft portions 8 are integrated). Then, the upper plate 11 is installed. At this time, an upper bearing 36 is provided between the upper plate 11 and the crank shaft 3. Finally, the fixed scroll 5 may be fixed to the opening holes 7A of the upper plate 11 and the lower plate 12.

The scroll-type fluid machine 1 of this embodiment is configured as described above. Therefore, in a case where it is used as a compressor or a blower, for example, the drive crank shaft 3A may be rotated (that is, input power). For example, the main shaft portion 35 that drives the crank shaft 3A is directly connected, that is, the motor is connected via a coupling. (Not shown) output shaft.

Thereby, the orbiting scroll 2 can be orbited relative to the fixed scroll 5. At this time, the power supply system supplied to the driving crank shaft 3A is also transmitted to the driven crank shaft 3B through the rotation synchronization mechanism 45, so that the three crank shafts 3 are synchronously rotated. When the orbiting scroll 2 is orbited relative to the fixed scroll 5, the fluid is sucked in from the first opening 60, and the fluid is compressed between the orbiting scroll 6 and the fixed scroll 50 while the fluid is drawn from The outer end side of the scroll moves toward the inner end side, so that the fluid can be discharged from the second opening 61.

On the other hand, when it is used as an expander, for example, the orbiting scroll 2 is rotated by a fluid, and a rotational driving force is given to the drive crank shaft 3A (that is, output power). For example, the drive crank shaft 3A is directly connected, that is, an input shaft of a driven machine (machine driven by an expander) is connected via a coupling.

Next, when the fluid is made to flow in from the second opening 61, the orbiting scroll 2 is orbited by the force of the fluid, and the flow system is expanded while being discharged from the first opening 60. Thereby, the rotational driving force of the orbiting scroll 2 can be taken out from the driving crank shaft 3A as the recovered power. At this time, the driven crank shaft 3B also rotates in synchronization with the drive crank shaft 3A through the rotation synchronization mechanism 45 in the same manner.

In addition, the scroll type fluid machine 1 of this embodiment can also be driven by the motor to drive the crank shaft 3A in the opposite direction, suck fluid from the second opening 61, and discharge the fluid to the first opening 60 for use.

As described above, the scroll type fluid machine 1 of this embodiment can be used as a compressor, an expander, a blower, a vacuum pump, and the like. In addition, The fluid that performs compression or expansion is not particularly limited, and can be applied to various fluids such as air, steam, and refrigerant.

In the scroll type fluid machine 1 of the present embodiment, the orbiting scroll 2 is configured by orbiting the orbiting scroll 6 in the receiving hole 7 of the casing 4 and maintained so as to be outside the receiving hole 7 in the casing 4. Turn around. On the other hand, the fixed scroll 5 is a flange in which the fixed scroll sheet 50 is arranged in the receiving hole 7 of the casing 4 so as to close the receiving hole 7 of the casing 4. 15 Disassembly. At this time, the end plate 20 of the fixed scroll 5 is also accommodated in the accommodation hole 7, thereby enabling a miniaturized configuration.

Due to the above configuration, the fixed scroll 5 can be easily removed from the casing 4 without disassembling the bearing portion of the orbiting scroll 2 with respect to the casing 4. Therefore, it is possible to easily perform replacement of parts, reprocessing, removal of foreign matter entry, and internal cleaning due to surface treatment and materials. For example, it is possible to easily replace the tip seal 21 of the orbiting scroll 6, the tip seal 51 of the fixed scroll 50, and the outer seal 52A of the outer scroll 52.

In addition, the orbiting scroll main body 17 can be attached to and detached from the orbiting scroll base 18. At this time, in the example shown in the figure, although it is necessary to disassemble the upper bearing 36 in the casing 4 to some extent, the orbiting scroll can be removed from the orbiting scroll base 18 without disassembling the orbiting bearing 29. The roll body 17 is removed from above. Therefore, similar to the fixed scroll 5, the maintenance of the orbiting scroll main body 17 can be easily performed. Furthermore, since the orbiting scroll body 17 provided with the orbiting scroll sheet 6 on both sides can be detached from above the orbiting scroll base 18 at a time, the assembling and disassembling work during maintenance is easy, which can shorten the time operation time.

In addition, when the orbiting scroll body 17 is detachably attached to the orbiting scroll base 18, if the orbiting scroll base 18 is configured to be detachable from the orbiting scroll base 18 through the receiving hole 7 of the casing 4. The roll body 17 is more preferable. At this time, the outer diameter of the base plate portion 16 of the orbiting scroll body 17 is formed to be smaller than the inner diameter of the receiving hole 7 of the cabinet 4, or even smaller than the inner diameter of the flange 15 of the receiving hole 7. Therefore, after the fixed scroll 5 is removed from the casing 4, the orbiting scroll body 17 can be further removed from the orbiting scroll base 18. Furthermore, the above-mentioned operation can be performed through the accommodation hole 7 of the casing 4 without disassembling and attaching to any bearing portion, so the workability is further improved.

In addition, according to the scroll type fluid machine 1 of this embodiment, a circle is provided in the gap between the outer ring of the orbiting bearing 29 and the bearing hole 33 of the orbiting scroll 2 on the eccentric shaft portions 8 of all the crank shafts 3. Ring-shaped pressing material 57. Thereby, when the orbiting scroll 2 is orbited, even if the orbiting scroll 2 deflects relative to the crank shaft 3 due to centrifugal force, the outer ring of the orbiting bearing 29 and the bearing hole 33 of the orbiting scroll 2 can be suppressed. The gap between them collapses, and the gap Y between the side surface of the fixed scroll sheet 50 and the side surface of the orbiting scroll sheet 6 can be maintained at a desired value.

For example, as shown in the left half of FIG. 2, in a state where the eccentric shaft portion 8 of the crank shaft 3 is disposed to the leftmost side, the orbiting scroll 2 is deflected to the left due to centrifugal force, and the eccentric shaft portion 8 The right peripheral side receives the load in such a manner that the fitting gap X of the orbiting bearing 29 collapses, so that the fixed scroll 50 and the orbiting scroll 6 become closer. However, the pressing member 57 supports the load, thereby suppressing the outer ring of the orbiting bearing 29 and the orbiting of the orbiting scroll 2. The gap X between the bearing holes 33 collapses, and the gap Y between the side surface of the fixed scroll sheet 50 and the side surface of the orbiting scroll sheet 6 can be maintained at a desired value. In addition, even if the gap X between the outer ring of the orbiting bearing 29 and the bearing hole 33 of the orbiting scroll 2 is completely collapsed, the collision can be mitigated by the action of the pressing member 57 and each scroll piece can be prevented Damage to 50 and 6. With the orbiting of the orbiting scroll 2, the above-mentioned effects can be sequentially and continuously performed along the circumferential direction of the crank shaft 3. As described above, since the gap Y between the scroll pieces 50 and 6 can be automatically adjusted, the machining accuracy and assembly accuracy of each part can be relaxed compared to conventional techniques. In addition, since the gap Y between the scroll pieces 50 and 6 can be automatically adjusted, the performance of the scroll-type fluid machine 1 can also be stabilized.

In addition, according to the scroll-type fluid machine 1 of this embodiment, a first section 3a and a second section 3b are provided on the crank shaft 3, the first section 3a is used to fix the positioning of the scroll 5 side, and the second section 3a The segment portion 3 b is used for positioning around the orbiting scroll 2 side, and thereby the positioning of the respective scrolls 2 and 5 with respect to the axial direction of each of the crank shafts 3 becomes easy. In other words, the components are assembled on the basis of the bearing abutment surface (a stepped portion abutting the upper end surface of the lower bearing 37) of the lower plate 12 of the casing 4 holding the fixed scroll 5, thereby making the orbiting scroll 2 The axial direction position is mechanically positioned. Furthermore, the orbiting bearing 29 provided on the eccentric shaft portion 8 is fixed to the eccentric shaft portion 8 by an inner ring, and the outer ring is not fixed to the bearing hole 33, so that the diameter between the scroll wraps 50 and 6 described above is not hindered. Adjustment function of the direction gap Y.

The scroll-type fluid machine 1 of the present invention is not limited to the configuration of the aforementioned embodiment and can be appropriately changed. Specifically, as long as Can be appropriately changed to other configurations: (a) the orbiting scroll 2 is a orbiting scroll body 17 formed by providing scroll-like orbiting scroll sheets 6 on both sides of the substrate portion 16, One side of the orbiting scroll base 18 is configured to be detachably attached to the accommodation hole 19 in the center; (b) a pair of fixed scrolls 5 are provided with scroll-like fixed scrolls on one side of the end plate 20 The winding sheet 50 is provided so that the fixed scroll sheet 50 meshes with the orbiting scroll sheet 6 to sandwich the orbiting scroll 2; (c) a plurality of crank shafts 3 are provided on the orbiting scroll base At a plurality of points in the circumferential direction of 18, the eccentric shaft portion 8 of the orbiting scroll base 18 is held in synchronization with the orbiting bearing 29 to rotate the orbiting scroll 2 relative to the fixed scroll 5.

For example, in the foregoing embodiment, the fixed scroll 5 and the casing 4 may be integrally formed. Specifically, the upper plate 11 and the fixed scroll 5 on the upper side may be integrally formed, and the lower plate 12 and the fixed scroll 5 on the lower side may be integrally formed.

In addition, in the foregoing embodiment, cooling fins may be provided on the outer peripheral portion of the orbiting scroll base 18. For example, fins extending outward may be provided on the outer peripheral surface of the orbiting scroll base 18 at regular intervals in the circumferential direction. At this time, the fin system may be integrally formed on the orbiting scroll base 18 or may be superimposed on the outer peripheral portion of the orbiting scroll base 18 and integrated. When the latter method is adopted, in order to improve the closeness between the orbiting scroll base 18 and the fins, a heat-dissipating glue may be interposed therebetween. By providing fins on the orbiting scroll base 18, when the orbiting scroll 2 orbits, a forced convective heat transfer with the outside air is generated by the orbiting movement, thereby promoting the cooling of the orbiting scroll 2 .

In addition, an appropriate groove may be formed in the outer peripheral portion of the orbiting scroll base 18 (for example, the And the rectangular grooves extending along the circumferential direction of the orbiting scroll base 18) have the same effects as the fins. By providing a large number of grooves in the peripheral direction of the orbiting scroll base 18 in the circumferential direction, the heat transfer area is increased, and air cooling can be effectively achieved. In addition, by adopting a rectangular groove, the degree of decrease in strength is also slight, and the flow of the cooling air is not in the axial direction but in a direction perpendicular to the axis, so it will not hinder the flow of air to the groove, so that The air cooling of the orbiting scroll 2 is performed efficiently.

In addition, in the foregoing embodiment, the fixed scroll 5, especially the end plate 20, may be formed to be air-cooled or water-cooled. For example, the end plate 20 of the fixed scroll 5 is provided with a pipe forming a water passing portion on a surface opposite to the fixed scroll piece 50 or a member overlapping the surface, so that water flows through the water passing portion. .

In addition, in the foregoing embodiment, when the orbiting scroll body 17 is mounted on the orbiting scroll base 18 in a plan view, if the ideal center of gravity position of the orbiting scroll 2 and the orbiting scroll 2 When the position of the center of gravity of the orbiting scroll 6 of the main body 17 is different, a proper balance adjustment material may be provided on the orbiting scroll base 18 to adjust the position of the center of gravity of the orbiting scroll 2. That is, the position of the center of gravity of the orbiting scroll body 17 can be adjusted with the orbiting scroll base 18 side. Furthermore, it is possible to achieve the balance of the entire orbiting scroll 2 without enlarging the outer shape of the orbiting scroll base 18. In addition, if a part code is marked on the remaining material portion provided on the orbiting scroll base 18, parts management becomes easy.

Further, in the foregoing embodiment, the tip seal 21 of the orbiting scroll sheet 6, the tip seal 51 of the fixed scroll sheet 50, and the peripheral scroll The seal of any one or more of the outer seals 52A of the roll sheet 52 may be omitted. At this time, since the removal and attachment of the fixed scroll 5 from the casing 4 and the removal and installation of the orbiting scroll body 17 from the orbiting scroll base 18 are easy, internal maintenance can be easily performed. Therefore, it is possible to easily perform surface treatment of parts, handling of materials, exclusion of foreign matter entry, cleaning of the interior, and the like.

In addition, in the foregoing embodiment, the casing 4 is formed to be substantially rectangular in a plan view, but is not limited thereto, and a circle, a triangle, or other polygons may also be adopted.

In addition, in the foregoing embodiment, the flange 15 is provided in the receiving hole 7 of the casing 4, and the outer peripheral portion of the end plate 20 of the fixed scroll 5 is overlapped with the flange 15 and installed, but the flange 15 may be omitted. It is installed instead of overlapping the outer peripheral portion of the end plate 20 of the fixed scroll 5 with the upper and lower surfaces of the casing 4 (the upper surface of the upper plate 11 and the lower surface of the lower plate 12). In this case, the fixed scroll 5 may be detachably attached to the casing 4 using bolts 53 and the like.

In addition, in the foregoing embodiment, the number of the crank shafts 3 is three, but it is also possible to use four or more. At this time, it is also possible to take one of them as the driving crank shaft 3A and the other as the driven crank shaft 3B, and each crank shaft is synchronously rotated by the rotation synchronization mechanism 45.

In addition, in the foregoing embodiment, a cylindrical guide ring may be fitted into the bearing hole 33 of the orbiting scroll base 18. At this time, the ring-shaped pressing material 57 is instead provided in the gap between the outer ring of the orbiting bearing 29 and the inner hole of the guide ring, instead of the outer ring and the orbiting scroll provided in the orbiting bearing 29 A gap between the bearing holes 33 of the base 18. In this way, it is possible to adjust the position of the orbiting scroll 2 and the crank shaft 3 in the radial direction.

In the foregoing embodiment, the bearing holding the eccentric shaft portion 8 is provided with a plurality of orbiting bearings 29. However, the orbiting bearings 29 may be spaced apart from each other in addition to the end faces overlapping each other. The adjustment tool overlaps. The adjusting system is formed in a cylindrical shape, for example, and is arranged in the outer ring. In this way, it is possible to adjust the position of the orbiting scroll 2 and the crank shaft 3 in the axial direction. Similarly, when the number of orbiting bearings 29 is one, the position of the orbiting scroll 2 and the crank shaft 3 in the axial direction can be adjusted using an adjusting tool.

Claims (6)

A scroll-type fluid machine is provided with: an orbiting scroll, which is provided with scroll-shaped orbiting scroll blades on both sides of a base plate portion; and a casing, which is capable of containing the aforementioned orbiting scroll in a manner capable of orbiting In the accommodation hole of the sheet, the substrate portion is arranged perpendicular to the axis of the accommodation hole, and at the outer peripheral portion of the substrate portion, the orbiting scroll is held at three or more circumferential directions by a crank shaft so as to be able to rotate. ; And a pair of fixed scrolls, which are provided with scroll-shaped fixed scrolls on one side of the end plate, so that the fixed scrolls and the orbiting scrolls mesh with each other to enclose the orbiting scrolls The method is detachably provided in the case. The scroll type fluid machine according to item 1 of the scope of patent application, wherein, in the orbiting scroll sheet, an extending front end portion extending from the substrate portion is detachably attached along the orbiting scroll. The scroll of the winding sheet is provided with a tip seal which fills the gap between the end plate of the fixed scroll and the fixed scroll sheet, in which an extended front end portion extending from the end plate is detachable. In one aspect, along the scroll of the fixed scroll, a tip seal is provided to fill a gap between the scroll and the substrate portion of the orbiting scroll. The scroll-type fluid machine according to item 2 of the scope of patent application, wherein the end plate of the fixed scroll is provided with a cylindrical outer scroll sheet so as to surround the fixed scroll sheet; the outer periphery In the scroll sheet, an extension front end portion extending from the end plate is detachably provided along a circumferential direction of the outer peripheral scroll sheet with a landfill and a substrate portion of the orbiting scroll. Gap external seal. The scroll-type fluid machine according to any one of claims 1 to 3, wherein in the casing, a pair of flanges are attached to a midway portion in the axial direction of the receiving hole, and along the axis of the receiving hole It is formed by being separated in direction and extending toward the inside of the accommodating hole; the outer peripheral portion of the orbiting scroll is maintained through the opening between the pair of flanges, and can be accommodated in the accommodating portion of the casing by the crank shaft. The outer side of the hole is wound with respect to the fixed scroll; the end plate of the fixed scroll is detachably fixed on the flange of the casing; the crank is provided at three or more positions in the circumferential direction of the casing. Only one of the shafts is given a rotational driving force. The scroll-type fluid machine according to any one of claims 1 to 3, wherein the orbiting scroll system includes: a orbiting scroll base held on the casing by the crank shaft; And the orbiting scroll body provided on both sides of the central portion of the orbiting scroll base; the orbiting scroll system includes the orbiting scroll sheet, and the orbiting scroll base is detachably provided; . The scroll-type fluid machine according to item 4 of the scope of the patent application, wherein the orbiting scroll system includes: a orbiting scroll base held by the crank shaft by the crankshaft; and The orbiting scroll body on both sides of the central portion of the orbiting scroll base; the orbiting scroll system includes the orbiting scroll sheet, and the orbiting scroll base is detachably provided.