JPH10122165A - Scroll fluid machine - Google Patents

Scroll fluid machine

Info

Publication number
JPH10122165A
JPH10122165A JP28250296A JP28250296A JPH10122165A JP H10122165 A JPH10122165 A JP H10122165A JP 28250296 A JP28250296 A JP 28250296A JP 28250296 A JP28250296 A JP 28250296A JP H10122165 A JPH10122165 A JP H10122165A
Authority
JP
Japan
Prior art keywords
scroll
oldham
orbiting scroll
oldham ring
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP28250296A
Other languages
Japanese (ja)
Inventor
Takahide Ito
隆英 伊藤
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP28250296A priority Critical patent/JPH10122165A/en
Publication of JPH10122165A publication Critical patent/JPH10122165A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/06Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/06Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
    • F01C17/063Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with only rolling movement

Abstract

(57) [Problem] To provide a scroll fluid machine that supports a rolling member without slipping and has no problem of seizure under flaking or poor lubrication conditions. The scroll fluid machine includes a orbiting scroll (2) rotatably provided with respect to a fixed scroll, a frame (6) for supporting a rotating shaft of the orbiting scroll, and revolving of the orbiting scroll is allowed but rotation is prevented. And an Oldham ring mechanism 3 provided between the frame and the orbiting scroll. The Oldham ring of the Oldham ring mechanism 3 is supported by thrust bearings 10 arranged between the thrust plate 65 of the frame and the Oldham ring and between the Oldham ring and the orbiting scroll. The thrust bearing 10 has a plurality of rolling rollers 10c.
Consists of

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll fluid machine having an orbiting scroll such as a scroll expander and a scroll compressor, and more particularly to a thrust support structure for the orbiting scroll.

Generally, a scroll compressor includes a fixed scroll 1 and an orbiting scroll 2 as shown in FIG. 8, and the orbiting scroll 2 revolves around the fixed scroll 1 while preventing its rotation. , For compressing the fluid. As is well known, a gas force acts on the orbiting scroll 2 in the axial direction, that is, a thrust force acts on the orbiting scroll 2.
In general, the orbiting scroll 2 is supported by a thrust plate 6a extending inward from the inner peripheral surface of the orbiting scroll.
In addition, as described in JP-B-61-15276, it was also common to support with a ball coupling.

Further, an apparatus that employs an Oldham-type anti-rotation mechanism to prevent the rotation of the orbiting scroll is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-264173. Some linear bearings are not arranged to support thrust forces.

[0004]

In the former thrust plate 6a, there is a concern that the problem of seizure of the orbiting scroll and the thrust bearing may occur at the time of poor lubrication. In the latter ball coupling, as shown in FIG. In order to support the thrust by the rolling and sliding motion of the ball 224,
Not only is a phenomenon called flaking in which the ball surface peels in a scaly shape likely to occur, but also the number of parts is very large, and the noise due to the revolution of the ball 224 is large. 9, reference numeral 2 denotes a orbiting scroll, 73 denotes a orbiting bearing, 214 denotes a orbiting scroll side race, 215 denotes a orbiting scroll side ring having a pocket 215a, 216 denotes a spring pin, 221 denotes a fixed race, and 222 denotes an end face of the fixed race. , A pocket 222, and a spring pin 223. SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-described problem, and provides a scroll fluid machine that supports a rolling member in a non-slip state and has no problem of seizure under flaking or poor lubrication conditions. The purpose is to do so.

[0005]

In order to achieve the above-mentioned object, a scroll fluid machine according to the present invention comprises a fixed scroll, an orbiting scroll rotatably provided with respect to the fixed scroll, and a orbiting scroll. A rotating shaft having an eccentric crank portion rotatably supported, a frame supporting the rotating shaft, and a rotating shaft provided between the frame and the orbiting scroll so as to permit revolving but prevent rotation. Oldham ring mechanism
The Oldham ring of the Oldham ring mechanism, between the thrust plate of the frame and the Oldham ring,
And a thrust bearing disposed between the Oldham ring and the orbiting scroll. Preferably, the thrust bearing is a rolling member. The Oldham ring has four Oldham keys spaced radially at 90 ° intervals and extending radially, and each of the rolling members is arranged in a row so that their longitudinal axes are parallel to each other. A longitudinal axis of a rolling roller corresponding to a pair of Oldham keys diametrically opposed to one another among the Oldham keys is a longitudinal axis of a rolling roller corresponding to the other pair of Oldham keys. Is preferably at an angle of 90 °. The rolling member may be composed of a plurality of rotatable balls arranged in a row. Further, the plurality of rolling rollers,
It can be incorporated in the Oldham key as a part of the corresponding Oldham key.

When the scroll fluid machine is configured as described above, the thrust force generated by the orbiting scroll is transmitted via the rolling member to the Oldham ring that reciprocates relatively with respect to the orbiting scroll. Further, the thrust force acting on the Oldham ring is transmitted to the thrust plate via a rolling member between the Oldham ring and the thrust plate. Since the Oldham ring, the turning thrust and the thrust plate reciprocate relatively, the rolling member interposed therebetween supports the thrust force without substantially sliding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
In the drawings, the same reference numerals indicate the same or corresponding parts, including the drawings related to the related art.

FIG. 1 is a longitudinal sectional view showing a vertical scroll compressor according to an embodiment of the present invention. Inside a sealed housing 8 which may be cylindrical, a scroll type compression mechanism C is provided at an upper portion. But the electric motor M
Are stored and installed, respectively, and the compression mechanism C and the electric motor M are coupled via a rotating shaft 5 so as to interlock with each other. As disclosed in, for example, JP-A-7-63174, the scroll-type compression mechanism C permits the fixed scroll 1, the orbiting scroll 2, and the revolving orbiting motion of the orbiting scroll 2, but prevents its rotation. And a support frame 6 to which the fixed scroll 1 is fastened, and an upper bearing 71 that supports the rotating shaft 5. As will be described later, the Oldham ring mechanism 3 is movable with respect to the frame 6 in, for example, the left and right directions on the paper surface of FIG. 1, and the orbiting scroll 2 is moved with respect to the Oldham ring mechanism 3 in a direction perpendicular to the paper surface. The rotation of the orbiting scroll 2 is thus prevented. still,
In FIG. 1, the Oldham ring mechanism 3 is schematically illustrated to simplify the drawing.

The fixed scroll 1 has an end plate 11 and a spiral wrap 12 extending downward from the inner or lower surface thereof.
The end plate 11 has a discharge port 13 formed therethrough and a discharge valve 1 for opening and closing the discharge port 13.
7 are provided. The orbiting scroll 2 includes an end plate 21
And a spiral wrap 22 extending upward from the upper surface thereof, and the wraps 12, 22 overlap in the radial direction. An eccentric bush 54 is rotatably fitted via a swivel bearing 73 into a cylindrical boss portion 23 erected so as to extend downward from the lower surface of the end plate 21.
An eccentric pin 53 projecting eccentrically from the upper end of the rotating shaft 5 and protruding from the upper end of the rotating shaft 5 is rotatably fitted in the hole 55 defined by 4. The fixed scroll 1 and the orbiting scroll 2 are offset from each other by a predetermined distance, and
A plurality of closed spaces 24 are formed by engaging the wraps 12 and 22 at an angle shifted by °. The wraps 12 and 22 defining the closed space 24 are shown in, for example, FIG. 7 of the above-mentioned Japanese Patent Application Laid-Open No. 7-63174.

The frame 6 is fixed in a sealed housing 8, and a thrust surface (thrust plate) 65 formed on the upper surface of the frame 6 and a lower back surface of the orbiting scroll 2 are used as rolling members as described later. In contact, the orbiting scroll 2 is supported by the frame 6. An oil groove 66 is formed in the thrust surface 65 in, for example, an annular shape. The top opening of the hole having a circular cross section formed in the center of the upper surface of the frame 6 is closed by the back surface of the orbiting scroll 2 to define an oil reservoir 61. This oil sump room 6
An oil drainage hole 62 is formed so as to be inclined downward and outward in the radial direction so as to face the lower part of the inner wall surface of the hole of the frame 6 that defines the frame 1.

At the lower end of the rotary shaft 5, a positive displacement oil pump 51 is provided. And this oil pump 51
A suction pipe 56 is connected to a suction port (not shown) of which the tip is an oil sump 81 at the bottom of the closed housing 8.
It is open to. A discharge port (not shown) of the oil pump 51 communicates with an oil supply hole 52 formed in the rotary shaft 5 in an axial direction. The oil supply hole 52 is provided on the rotating shaft 5.
And extends upward, and also penetrates the eccentric pin 53.

When the electric motor M is driven, the orbiting scroll 2 is driven via a revolving orbiting mechanism including a rotary shaft 5, an eccentric pin 53, an eccentric bush (crank portion) 54, a boss portion 23, and the like. 2
Revolves on a circular orbit having a revolving radius of revolution while being prevented from rotating by the Oldham ring mechanism 3. Such motion is also known in scroll compressors.

By this movement, the suction gas enters the closed housing 8 through the suction pipe 82, passes through the gas passage 85 formed through the frame 6, passes through the suction passage 15 of the orbiting scroll 1, and passes through the above-described closed space. Inhaled into 24. Then, the suction gas reaches the center portion while being compressed as the volume of the sealed space 24 decreases as is well known, due to the revolving orbiting motion of the orbiting scroll 2, and reaches the end plate 1.
1 through a discharge port 13 formed through the discharge valve 17
To open the discharge cavity 14 defined in the scroll-type compression mechanism C, and connect the discharge pipe 83 connected to the scroll-type compression mechanism C so as to communicate with the discharge cavity.
Is discharged to the outside through.

On the other hand, since the oil pump 51 is driven at the same time as the electric motor M is driven, the lubricating oil stored in the oil sump 81 at the bottom of the sealed housing 8 is sucked up through the suction pipe 56 and is supplied to the oil supply hole. 52. Next, the lubricating oil flows upward in the oil supply hole 52, splits on the way to lubricate the lower bearing 72 and the upper bearing 71, and the main flow is ejected from the opening of the oil supply hole 52 at the tip of the eccentric pin 53, The eccentric pin 53 and the slewing bearing 73 are lubricated and enter the oil reservoir 61. Thereafter, the lubricating oil passes through an oil groove 66 to lubricate sliding parts such as the thrust surface 65 and the Oldham ring mechanism 3. A part of the lubricating oil that has entered the oil sump chamber 61 is
And finally returns to the oil sump 81 through the passage 9 formed between the outer periphery of the stator of the electric motor M and the sealed housing 8 and is stored.

FIG. 2 is a perspective view showing details of the Oldham ring mechanism 3 according to the first embodiment of the present invention used in the scroll compressor as described above.
Shows a cross section taken along line AA of FIG. The Oldham ring mechanism 3 disposed between the thrust plate of the frame 6 and the orbiting scroll 2 includes an annular disk-shaped main body 3a.
And four Oldham keys 3b-3e extending radially outward from the outer peripheral surface of the main body, and adjacent Oldham keys are circumferentially separated from each other by 90 ° as shown. . The main body 3a of the Oldham ring mechanism 3 has a circulating rolling bearing (thrust bearing) 10 in a box-shaped space 3f defined near the roots of the two pairs of Oldham keys.

As can be understood from FIGS. 2 and 3, each of the circulating rolling bearings 10 includes a support portion 10a provided on a wall surface defining a space 3f, and a support member 10a that circulates around the support portion 10a. Endless retainer 10b, and a plurality of parallel rollers (rolling members) 10c connected and held in a circular row by the retainer. Each roller 10c is held by a retainer 10b with its longitudinal axis oriented parallel to each other. A circulating rolling bearing located near the base of a pair of Oldham keys 3b, 3d diametrically facing each other;
The circulating rolling bearings located near the roots of the remaining pair of Oldham keys 3c and 3e are disposed with their longitudinal axes changed so that the circulating directions of the roller rows are different from each other by 90 °. .

As shown exaggeratedly in FIG. 3, the rollers of the rolling bearing at the roots of the Oldham keys 3b and 3d slightly protrude from the bottom surface of the main body 3a. Touch, while Oldham Key 3
The rollers of the rolling bearings at the roots of c and 3e slightly protrude from the upper surface of the main body 3a and come into contact with the lower surface of the orbiting scroll 2.

FIGS. 4 and 5 show a second embodiment of the Oldham ring mechanism 3 according to the present invention. In this embodiment, a plate-shaped retainer is used in place of each of the circulating rolling bearings shown in FIG. 20a and a row of parallel rollers or rollers (rolling members) 20 held by the retainer.
b), and the length of the groove-shaped space 3g (bearing 20) formed in the main body 3a for accommodating the rolling guide device 20 is provided.
Of the orbiting scroll 2 and the Oldham ring mechanism 3 or the relative moving distance of the Oldham ring mechanism 3 and the frame 6 is larger than the length of the retainer 20a. It is preferable that the length is such that it can be moved by 1/2 or more.

The Oldham ring can be formed from various materials, but if it is made of aluminum, the space 3
It is preferable to lay a plate 20c of an appropriate thickness, preferably made of bearing steel, on the bottom of g to support the surface pressure of the roller.

FIG. 6 shows a third embodiment of the Oldham ring mechanism 3 according to the present invention. In this embodiment,
A circulating rolling bearing 30 having a structure similar to that shown in FIG.
Is installed at the Oldham key itself, not at the main body 3a of the Oldham ring. In this case, a box-shaped space may be defined in each Oldham key as shown in FIG. 1 and an Oldham ring may be accommodated therein, but a detachable casing 30a is separately prepared for the Oldham key,
It is preferable that an Oldham ring mechanism is incorporated therein in advance.

Further, in the Oldham ring mechanism according to the fourth embodiment shown in FIG. 7, in order to support the thrust force, a plurality of movable members accommodated in the grooves 40b are arranged in rows instead of rollers in order to support the thrust force. A rolling bearing 40 composed of a rotating ball 40a is used. Although the rolling bearing 40 is illustrated as being provided only on the upper surface of the Oldham ring, it can be provided on both the upper surface and the lower surface of the Oldham ring.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit and scope of the present invention.

[0023]

As described above, according to the present invention, since the Oldham ring is supported by the thrust bearing without slipping, the seizure of the orbiting scroll does not substantially occur even when lubrication is poor. In addition, it is possible to reduce the occurrence of a phenomenon such as flaking in which the surface of the thrust bearing peels in a scaly shape, thereby providing a highly reliable thrust support structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a scroll fluid machine having an Oldham ring mechanism according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing an Oldham ring mechanism in the scroll fluid machine of FIG. 1;

FIG. 3 is an enlarged sectional view showing an Oldham ring mechanism in the scroll fluid machine along the line AA in FIG. 2, together with the orbiting scroll and the thrust plate of the frame.

FIG. 4 is a perspective view of an Oldham ring mechanism according to a second embodiment of the present invention.

5 is a sectional view corresponding to FIG. 3, showing the Oldham ring mechanism of FIG. 4 along the line BB.

FIG. 6 is a perspective view of an Oldham ring mechanism according to a third embodiment of the present invention.

FIG. 7 is a perspective view of an Oldham ring mechanism according to a fourth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a thrust fluid machine having a conventional thrust support structure.

FIG. 9 is an exploded perspective view showing a conventional ball coupling type thrust support structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... fixed scroll, 2 ... orbiting scroll, 3 ... Oldham ring mechanism, 3b-3e ... Oldham key, 5 ... rotating shaft (rotating axis), 6 ... frame, 10, 20, 30,
Reference numeral 40 denotes a rolling member (rolling bearing), 10c denotes a rolling roller, 40a denotes a rotatable ball, 53 denotes an eccentric pin (eccentric crank portion), and 65 denotes a thrust surface (thrust plate).

Claims (5)

[Claims]
1. A rotating shaft having a fixed scroll, an orbiting scroll rotatably provided with respect to the fixed scroll, an eccentric crank portion rotatably supporting the orbiting scroll, and supporting the rotating shaft. And an Oldham ring mechanism provided between the frame and the orbiting scroll so as to allow rotation of the orbiting scroll but prevent rotation of the orbiting scroll, and the Oldham ring of the Oldham ring mechanism includes the Oldham ring. A scroll fluid machine supported by a thrust bearing disposed between the orbiting scroll and the thrust plate of the Oldham ring and the frame.
2. The scroll fluid machine according to claim 1, wherein said thrust bearing is a rolling member.
3. The Oldham ring has a circumferential direction of 90 degrees.
The four rolling elements are radially spaced apart from each other at an angle of °, and each of the rolling members comprises a plurality of rolling rollers arranged in a row such that their longitudinal axes are parallel to each other. A longitudinal axis of a rolling roller corresponding to a pair of diametrically opposed Oldham keys of the Oldham key forms an angle of 90 ° with a longitudinal axis of a rolling roller corresponding to the other pair of Oldham keys. Item 3. A scroll fluid machine according to Item 2.
4. The scroll fluid machine according to claim 2, wherein the rolling member comprises a plurality of rotatable balls arranged in a row.
5. The scroll fluid machine according to claim 3, wherein the plurality of rolling rollers are incorporated in the Oldham key as a part of the corresponding Oldham key.
JP28250296A 1996-10-24 1996-10-24 Scroll fluid machine Withdrawn JPH10122165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28250296A JPH10122165A (en) 1996-10-24 1996-10-24 Scroll fluid machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28250296A JPH10122165A (en) 1996-10-24 1996-10-24 Scroll fluid machine

Publications (1)

Publication Number Publication Date
JPH10122165A true JPH10122165A (en) 1998-05-12

Family

ID=17653283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28250296A Withdrawn JPH10122165A (en) 1996-10-24 1996-10-24 Scroll fluid machine

Country Status (1)

Country Link
JP (1) JPH10122165A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242857A (en) * 2001-02-16 2002-08-28 Denso Corp Thrust bearing
US7658600B2 (en) * 2006-06-14 2010-02-09 Mitsubishi Heavy Industries, Ltd. Scroll compressor with thrustplate peeling prevention
JP2016118212A (en) * 2016-03-28 2016-06-30 三菱重工業株式会社 Fluid machinery
CN106481559A (en) * 2015-08-25 2017-03-08 珠海格力节能环保制冷技术研究中心有限公司 A kind of screw compressor and its cross slip-ring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242857A (en) * 2001-02-16 2002-08-28 Denso Corp Thrust bearing
JP4597396B2 (en) * 2001-02-16 2010-12-15 Ntn株式会社 Thrust bearing
US7658600B2 (en) * 2006-06-14 2010-02-09 Mitsubishi Heavy Industries, Ltd. Scroll compressor with thrustplate peeling prevention
CN106481559A (en) * 2015-08-25 2017-03-08 珠海格力节能环保制冷技术研究中心有限公司 A kind of screw compressor and its cross slip-ring
JP2016118212A (en) * 2016-03-28 2016-06-30 三菱重工業株式会社 Fluid machinery

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Legal Events

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A300 Withdrawal of application because of no request for examination

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Effective date: 20040106