JPH08151984A - Scroll type fluid device - Google Patents

Abstract

PURPOSE: To attain sufficiently lubricating an Oldham's coupling by a simple constitution, in a scroll type fluid device wherein a turn scroll is supported incapable of rotating on its own axis by the Oldham's coupling. CONSTITUTION: A turn scroll is arranged in a lower side of a fixed scroll 10, to support the turn scroll disabled from rotating on its own axis through an Oldham's ring, in a support housing, and a supply oil passage 19, arranged from the support housing over to an upper surface of the fixed scroll 10, is formed. In the fixed scroll 10, through holes 21 extended in a perpendicular direction are formed in a manner wherein an upper end is opened to the upper surface of the fixed scroll 10 to open the other end in a position opposed to a pawl of the Oldham's ring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid device used for a compressor of a refrigeration system, and more particularly to a measure for improving lubrication performance for a rotation preventing mechanism of an orbiting scroll.

[0002]

2. Description of the Related Art Conventionally, as a compressor of a refrigeration system,
For example, a scroll type fluid device as disclosed in Japanese Patent Laid-Open No. 6-280768 is known. This scroll type fluid device is provided with a fixed scroll and a revolving scroll in a compression mechanism part, and wraps standing on the end plates of the respective scrolls mesh with each other to form a working chamber therebetween.
As the fluid compression operation, the orbiting scroll revolves with respect to the fixed scroll without revolving, thereby contracting the working chamber and compressing the fluid.

In order to orbit the orbiting scroll, an Oldham coupling is formed between the orbiting scroll and a support housing that supports the orbiting scroll. The Oldham coupling will be described. The Oldham coupling includes an Oldham ring interposed between an orbiting scroll and a support housing. This Oldham ring has a pair of upper claws projecting from the upper surface of an annular ring body at positions facing each other with the center of the ring body sandwiched therebetween. A pair of lower claws are provided on the lower surface of the ring main body at a position displaced by 90 °. A pair of grooves for slidably fitting the upper claws are provided on the lower surface of the orbiting scroll, and the lower claws are slid on the upper surface of the support housing in a direction orthogonal to the sliding direction of the upper claws. A pair of grooves that are freely fitted are formed respectively. The claws are fitted in the grooves, respectively, and the Oldham ring linearly reciprocates relative to the orbiting scroll and the support housing (reciprocating movement in two orthogonal directions), whereby the orbiting scroll revolves with respect to the support housing. It is configured to do.

[0004]

By the way, since such a scroll type fluid device has sliding parts at various places, it is possible to use an oil supply pump and an oil supply passage provided on a drive shaft connected to the orbiting scroll. , Lubrication oil is supplied to this sliding portion.

However, until now, the Oldham coupling has been designed to be lubricated by supplying lubricating oil flowing out from a thrust bearing, which is a sliding portion of an orbiting scroll, to lubricate the thrust bearing. When the oil falls to the bottom of the casing, part of it may flow between the claws of the Oldham ring and each groove, or the mist-like lubricating oil that flows with the refrigerant gas may adhere to the claws and grooves to perform lubrication. Was being considered.

However, with this, it is difficult to reliably secure the amount of lubricating oil supplied to the Oldham joint.
It cannot be said that the reliability of lubrication is sufficiently obtained. Especially when a lubricating oil with a large specific gravity (for example, a fluorine-based lubricating oil) is used, the lubricating oil that lubricates the sliding parts of the orbiting scroll does not flow between the claws and grooves of the Oldham ring and the casing bottom part. There is a high possibility that the Oldham joint will be lubricated, and the lubrication of the Oldham joint can hardly be performed, so that the amount of wear of the claws and grooves forming the Oldham joint is remarkably increased and the reliability is deteriorated.

The present invention has been made in view of these points, and an object thereof is to sufficiently lubricate an Oldham coupling with a simple structure.

[0008]

In order to achieve the above object, the present invention is to guide the lubricating oil to a sliding portion of the Oldham coupling after the lubricating oil is once pumped up to a position higher than the Oldham coupling. I decided to do it.

Specifically, the invention according to claim 1 is a mirror plate (1
Fixed scroll (10) and orbiting scroll (11) with spiral wraps (10b), (11b) standing on the front of (0a), (11a)
The wraps (10b) and (11b) are meshed with each other so that both end plates (1b)
Casing to form working chamber (14) between 0a) and (11a)
(2) is housed in the orbiting scroll (11) is supported by a rotation prevention mechanism (16), the orbiting scroll (11)
Revolves around the fixed scroll (10) without rotating, so that the fluid to be compressed is introduced into the working chamber (14), compressed, and then discharged from the working chamber (14). At the same time, it is premised on a scroll type fluid device provided with lubricating oil supply means (8a), (8b) for supplying lubricating oil to the sliding portion of the orbiting scroll (11). Then, after guiding a part of the lubricating oil from the lubricating oil supply means (8a), (8b) to a position above the rotation preventing mechanism (16), this lubricating oil is slid on the rotation preventing mechanism (16). Lubricating oil guide means (19), (21), and (22) are provided so as to drop and feed from the vertical direction toward the moving part.

According to a second aspect of the invention, in the scroll type fluid device according to the first aspect, the fixed scroll (10) is provided.
Is arranged above the orbiting scroll (11), and the rotation prevention mechanism (16) has a guide groove (17a) formed in the upper surface of the support housing (12) for supporting the orbiting scroll (11) and an orbiting scroll ( An Oldham ring having a guide groove formed on the lower surface of 11) and extending in a direction orthogonal to the guide groove (17a), and claws (13b) and (13c) fitted in these guide grooves.
(13) and the claws (13b), (13c) are fitted in the guide grooves, respectively, and the Oldham ring (13) is orbiting scroll (11).
Also, the reciprocating motion relative to the support housing (12) can be freely performed, and the orbiting scroll (11) is fixed scroll (10).
Try to revolve around without rotating. Also,
The lubricating oil guide means has a first oil supply passageway (19) formed from the support housing (12) to the fixed scroll (10) and guiding the lubricating oil to the upper surface of the fixed scroll (10), and the upper end of the fixed scroll (19). On the upper surface of 10), the lower end is the nail of the Oldham ring (13).
Second open to the upper position facing (13b), (13c) respectively
The fuel supply passage (21) is provided.

According to a third aspect of the present invention, in the scroll type fluid device according to the first aspect, the scrolls are arranged in the same manner as in the invention according to the second aspect, and a similar rotation preventing mechanism (16) is provided. Be prepared. Then, in the lubricating oil guide means, an oil supply passageway (19) formed from the support housing (12) to the fixed scroll (10) and guiding the lubricating oil to the upper surface of the fixed scroll (10), and one end of the fixed scroll ( On the upper surface of 10), the other end is provided with a gutter member (22) which is opened at an upper position facing the claws (13b), (13c) of the Oldham ring (13).

According to a fourth aspect of the invention, in the scroll type fluid device according to the first aspect, the scrolls are arranged in the same manner as in the invention according to the second aspect, and the same rotation preventing mechanism (16) is provided. Be prepared. Then, in the lubricating oil guide means, an oil supply passageway (19) formed from the support housing (12) to the fixed scroll (10) and guiding the lubricating oil to the upper surface of the fixed scroll (10), and one end of the fixed scroll ( On the upper surface of 10), the other end is provided with a tubular body (25) opened at a position facing the claws (13b), (13c) of the Oldham ring (13).

The invention according to claim 5 is the above-mentioned claim 1,
In the scroll type fluid device according to 2, 3, or 4,
Lubricating oil is fluorinated oil.

[0014]

With the above construction, the present invention provides the following actions. According to the first aspect of the invention, when the device is driven, the orbiting scroll (11) is prevented from rotating by the rotation preventing mechanism (16), so that the orbiting scroll (1) is prevented.
1) revolves around the fixed scroll (10), the fluid to be compressed is introduced into the working chamber (14), is compressed, and is then discharged from the working chamber (14). During such driving, lubricating oil is supplied to the sliding portion of the orbiting scroll (11) by the lubricating oil supply means (8b). And, this lubricating oil supply means (8a),
A part of the lubricating oil from (8b) is part of the lubricating oil guide means (19), (2
By 1) and (22), it is guided to a position above the rotation prevention mechanism (16), and then this lubricating oil is dropped and supplied toward the sliding portion of the rotation prevention mechanism (16). Therefore, the rotation prevention mechanism
Lubrication (16) can be performed reliably and sufficiently.

According to a second aspect of the invention, the rotation preventing mechanism (1
As an operation for guiding the lubricating oil to the sliding portion of 6), the lubricating oil is guided to the upper surface of the fixed scroll (10) by the first oil supply passageway (19), and then this lubricating oil The oil is supplied from the upper surface of the fixed scroll (10) to the pawls (13b), (13c) of the Oldham ring (13) by the oil supply passage (21).

According to the third aspect of the present invention, the lubricating oil is guided to the upper surface of the fixed scroll (10) by the oil supply passage (19), and thereafter, this lubricating oil is supplied to the fixed scroll (10) by the gutter member (22). From the top, the nails (13b), (13c) of the Oldham ring (13)
Is supplied toward the ground.

In the invention according to claim 4, the lubricating oil is guided to the upper surface of the fixed scroll (10) by the oil supply passage (19), and thereafter, this lubricating oil is fixed by the tubular body (25).
It is dropped and supplied from the upper surface of (10) toward the claws (13b), (13c) of the Oldham ring (13).

According to the fifth aspect of the invention, when a fluorine-based lubricating oil having a large specific gravity is used, conventionally, the lubricating oil lubricates the sliding portion of the orbiting scroll (11) and then the rotation preventing mechanism ( Although there was a high possibility of falling to the bottom of the casing (2) without lubricating 16), according to the present invention, even if such a lubricating oil is used, the rotation preventing mechanism (16) is well lubricated. can do.

[0019]

【Example】

(First Embodiment) Next, a first embodiment of the present invention will be described with reference to the drawings. The scroll type fluid device according to this example is used as a compressor for a refrigerator, and compresses and discharges a refrigerant gas.

As shown in FIG. 1, this scroll type fluid device (1) has a scroll mechanism (3) as a compression mechanism for sucking, compressing and discharging a refrigerant gas in an upper part of a hermetically sealed casing (2). However, a drive mechanism (4) for driving the scroll mechanism (3) is housed in the lower part. In addition, a suction pipe (5) for sucking the refrigerant gas into the casing (2) is provided at a position below the scroll mechanism (3) on the side wall of the casing (2) so as to project laterally. At the center of the upper surface of the casing (2), a discharge pipe (6) for discharging the refrigerant gas compressed in the scroll mechanism (3) from the casing (2) is provided so as to project upward.

The drive mechanism (4) comprises an electric motor (7) and a crankshaft (8) connected thereto. This Electric Motor (7)
Is a stator (7a) fixed to the inner wall of the casing (2).
And a rotor (7b) inserted in the stator (7a). The lower part of the crankshaft (8) is inserted into the rotor (7b), and the oil pump (8a) is provided at the lower end of the crankshaft (8), and the oil pump (8a) is a casing.
It is immersed in the lubricating oil stored in the oil sump (2a) below (2). Further, the crankshaft (8) has an oil supply passage (8b) for supplying the lubricating oil pumped up by the oil supply pump (8a) to the scroll mechanism (3) and each sliding portion of the crankshaft (8).
Are formed through. Further, in this example, a fluorohydrocarbon refrigerant (HFC refrigerant) is used as the refrigerant to be compressed, and a fluorine-based refrigerant having a relatively large specific gravity is used as the lubricating oil. ing. Specific examples of the fluorine-based lubricating oil include FPE oil (fluorinated pentaerythritol oil), which is a mixture of two types of compounds represented by Chemical formula 1, 6FIS oil (6F trimer isostearyl oil) represented by Chemical formula 2, The FEPM oil (fluorinated epoxy myristyl oil) represented by Chemical formula 3 is used. In addition to such fluorine-based lubricating oil, mineral oil or synthetic oil may be used.

[0022]

Embedded image

Embedded image

Embedded image The scroll mechanism (3) comprises a fixed scroll (10) and an orbiting scroll (11). Fixed scroll (10)
Is integrally fixed to the casing (2), and a wrap (10b) formed in a spiral shape (involute shape) is erected on the lower surface of the disk-shaped end plate (10a). Further, a discharge pipe portion (10d) having a discharge port (10c) for discharging the compressed gas refrigerant upward is integrally formed in the central portion of the end plate (10a) of the fixed scroll (10). In addition, a partition plate (9) made of a donut-shaped disc around the discharge pipe section (10d).
Is provided. This divider (9) is a fixed scroll
It is arranged at an upper position with a slight distance from the upper surface of the end plate (10a) of (10), and its outer peripheral edge is the casing (2).
While being fixed to the inner peripheral surface of the O-ring (R)
It is fitted to the outer peripheral surface of the discharge pipe portion (10d) via the. As a result, the scroll mechanism inside the casing (2)
The upper space of (3) is divided into a lower low-pressure space (A) and an upper high-pressure space (B) by this partition plate (9).

On the other hand, the orbiting scroll (11) is supported via a Oldham ring (13) in a support housing (12) arranged on the lower side of the orbiting scroll and fixed to the inner surface of the casing (2). It has a shape that is almost symmetrical to the scroll (10),
A wrap (11b) formed in a spiral shape (involute shape) is erected on the upper surface of a disk-shaped end plate (11a),
The wraps (10b) of the fixed scrolls (10) facing each other are arranged so as to mesh with each other. Then, as shown in FIG. 2, the inner and outer wall surfaces of the wrap (11b) of the orbiting scroll (11) are fixed to the wrap (10b) of the fixed scroll (10).
The outer peripheral surface and the inner peripheral surface are in contact with each other at a plurality of locations in the spiral direction, and a working chamber (14) for compressing the refrigerant gas is formed between these contact portions. The positions of the outer peripheral edges of the wraps (10b) and (11b) that are in contact with each other are located on the opposite sides of the center of the scroll mechanism (3). Introducing parts (3a) and (3a) are provided for introducing the refrigerant gas into the chamber (14). In other words, the introduction portions (3a), (3a) are formed at two locations opposite to each other with the center of the scroll mechanism (3) in between, and as shown by the arrows in FIG. (3a), (3a)
The refrigerant gas is introduced into the working chamber (14) from the.

As shown in FIG. 1, the orbiting scroll (1
A scroll shaft (15) having a bearing hole (15a) formed in the center is provided on the rear surface of the end plate (11a) of 1) so as to project.

The upper end portion of the crankshaft (8) has a bearing hole (12a) formed in the support housing (12).
An eccentric cam portion that is eccentric to the shaft center (O) of the crankshaft (8) and has an outer diameter dimension that substantially matches the inner diameter of the bearing hole (15a). (8c) is integrally formed. The eccentric cam portion (8c) is fitted into the bearing hole (15a) of the orbiting scroll (11).
In addition, as described above, the Oldham ring (13) is interposed between the orbiting scroll (11) and the support housing (12), so that the orbiting scroll (11) is prevented from rotating as a rotation preventing mechanism. The Oldham coupling (16) is constructed.
With these configurations, the orbiting scroll (11) revolves without rotating with the rotation of the crankshaft (8) and the working chamber (1
4) is contracted.

The Oldham coupling (16) and its peripheral structure will be described in detail. The Oldham ring (13) is, as shown in FIG. 6, formed on the upper surface of an annular ring body (13a). ), A pair of upper claws (13b), (13b) are provided so as to be opposed to each other across the center of the ring body, and the ring body (13a) is surrounded by the upper claws (13b), (13b). A pair of lower claws (13c), (13c) are provided on the lower surface of the ring body (13a) at a position offset by 90 ° in the direction. Then, on the lower surface of the orbiting scroll (11), the upper claws (13b), (1
A pair of grooves (not shown) into which 3b) is slidably fitted is formed.

On the other hand, as shown in FIG. 5, the support housing (12) has a cylindrical bearing portion having the bearing hole (12a).
(12b) and a fixed part (12c) formed on both left and right sides in FIG. 5 and having outer peripheral parts fixed to the inner surface of the casing (2),
Oldham ring (13) formed on both upper and lower sides in FIG.
Pair of grooves (17a), (17a) for fitting the lower claw (13c)
And guide portions (17), (17) having

The bearing portion (12b) has a function as a thrust bearing on which the orbiting scroll (11) is placed and which supports the orbiting scroll (11). Also,
This bearing portion (12b) has an oil supply passage (12e) extending from the inner peripheral surface to the upper end surface thereof, and the lubricating oil supplied from the oil supply passage (8b) of the crankshaft (8) is Refueling passage (12
The oil is supplied to the upper end surface of the bearing portion (12b) via e), thereby lubricating the sliding portion between the orbiting scroll (11) and the bearing portion (12b). Also, the fixed part (12c)
Is the wrap (10b), (11b) of each scroll (10), (11)
It is located below the inlets (3a), (3a) formed at the outer peripheral edge of the refrigerant gas introduced from the inlets (3a), (3a) into the working chamber (14) (Fig. The arrow 2) flows above the fixing portion 12c (see the arrow in FIG. 5). Further, the fixed portion (12c) is provided with a fixed seat (12d) in which an outer peripheral edge portion of the upper surface thereof is partially projected upward, and the fixed scroll (12d) is provided on the upper surface of the fixed scroll (12d). (10) is placed and fixed.

On the other hand, the guide portion (17) extends in the radial direction of the support housing (12), faces the outer side in the horizontal direction, and slides on the upper surface of the lower claw (13c) of the Oldham ring (13). A horizontal portion (17b) freely placed, and a pair of vertical wall portions (17c) extending upward from both ends of the horizontal portion (17b) in the width direction (circumferential side of the support housing (12)), (17d) and groove (17
a) is formed. As a result, as shown in phantom in FIG. 5, the Oldham ring (13) is attached to each lower claw (13
c) and (13c) are fitted into the grooves (17a) and (17a), respectively, and these grooves (17
It is slidable in the extension direction of a) and (17a) (vertical direction in Fig. 5).

In this manner, the Oldham ring (13) is linearly reciprocated relative to the orbiting scroll (11) and the support housing (12) (reciprocal movement in directions orthogonal to each other).
The Oldham coupling that revolves the orbiting scroll (11) with respect to the support housing (12) by enabling
(16) is configured.

Further, the structure of the support housing (12) will be described in detail. As shown in FIG. 5, the support housing (12) is provided between the fixed portion (12c) and the guide portion (17). Communication portions (18a), (18b), (18c), (18d) are formed at four places so as to communicate the upper and lower sides of the support housing (12). Then, these four communication parts (18a), (18b), (18c), (1
In 8d), the two communicating parts (18a), (18c) located adjacent to the fixed parts (12c), (12c) in the clockwise direction are
The refrigerant introduced from the suction pipe (5) into the closed casing (2) is located close to the introduction parts (3a) and (3a), and the two communication parts (18a) and (18c) ) From the bottom to the top to be introduced into the working chamber (14) through the introduction parts (3a) and (3a), respectively.

As one of the features of this embodiment, as shown in FIG. 1, the support housing (12) and the fixed scroll (10) are provided.
An oil supply passage (19) is formed as a first oil supply passage which constitutes a lubricating oil guide means for supplying the lubricating oil supplied from the oil supply passage (8b) toward the upper surface of the fixed scroll (10). ing. In detail, one end of the support housing (12) is open to the inner peripheral surface of the bearing portion (12b), and the other end of the support housing (12) extends upward inside the fixed seat (12d) and is located above the fixed seat (12d). A housing-side oil supply passage (19a) that opens is formed. Further, the fixed scroll (10) vertically penetrates the outer peripheral edge portion of the fixed scroll (10), the lower end portion faces the upper end opening portion of the housing side oil supply passageway (19a), and the upper end portion is fixed. The scroll side oil supply passage (19
b) has been formed. Therefore, the refueling pump (8a)
The lubricating oil that has reached the housing side oil supply passageway (19a) through the oil supply passageway (8b) flows through the scroll side oil supply passageway (19b) and is supplied to the upper surface of the fixed scroll (10).

Next, the shape of the fixed scroll (10) which is another feature of this embodiment will be described in detail. As shown in FIGS. 3 and 4, the fixed scroll (10) has an annular flange portion in which the outer peripheral edge portion of the upper surface is slightly raised.
A storage recess (20) for storing lubricating oil is formed on the inner peripheral side of the flange portion (10e) and on the outer peripheral side of the discharge pipe portion (10d). The upper end of the scroll side oil supply passageway (19b) is opened to the outer peripheral edge of the storage recess (20).

The fixed scroll (10) is characterized by a lubricating oil guide means for supplying the Oldham coupling (16) with the lubricating oil stored in the storage recess (20). 2 Multiple through holes (21), (2
1), ... are formed. Specifically, the through hole (21) is formed by vertically penetrating the fixed scroll (10) at the boundary between the storage recess (20) and the flange portion (10e). Further, the positions of the through holes (21), (21), ... Are the respective claws (13b), (13b), (13c), (1) of the Oldham ring (13).
It is set above 3c). In other words, the lubricating oil dropped from the storage recess (20) through the through holes (21), (21), ... Retains the claws (13b), (13b), (13c), (13c) of the Oldham ring (13). ) Is supplied to the periphery. In addition, this through hole (2
An inclined guide groove (21a) inclined downward toward the outer peripheral side is provided at the upper end of (1) so that the lubricating oil in the storage recess (20) is smoothly guided to the through hole (21). ) Is formed on the upper surface of the storage recess (20).

Next, the compression operation of the scroll type fluid device (1) constructed as described above will be explained. Electric motor
When (7) is driven, the crankshaft (8) rotates about the shaft center (O). At this time, the eccentric cam portion (8c) revolves around the axis (O) of the crankshaft (8). With this,
The orbiting scroll (11) with which the eccentric cam portion (8c) is linked is prevented from rotating by the Oldham coupling (16), and thus revolves around the fixed scroll (10).

As a result, the contact points of the wraps (10b) and (11b) of the scrolls (10) and (11) are set to the scroll mechanism.
It moves toward the center of (3), and with it, the working chamber (1
4) is contracted while moving spirally toward the center.
By this series of operations, low-pressure refrigerant gas is sucked into the suction pipe (5).
Once sucked into the casing (2) from the above, it passes through the communication parts (18a), (18c) of the support housing (12) from bottom to top,
It flows into the working chamber (14) through the introduction part (3a). Then, the refrigerant that has flowed into the working chamber (14) is compressed into a high pressure, reaches the center of the working chamber (14), and then passes through the discharge port (10c) to the upper side of the scroll mechanism (3). Discharge pipe through the space of (6)
Is discharged from.

Also, at the time of this compression operation, the oil supply pump (8a)
The lubricating oil pumped up by the oil passes through the oil supply passage (8b) and the bearing part on the outer peripheral side of the crankshaft (8) and the support housing.
It is supplied to the upper end surface through an oil supply passage (12e) formed in the shaft portion of (12), and the sliding portions of the crankshaft (8) and the orbiting scroll (11) are lubricated. Further, a part of this lubricating oil flows through the oil supply passage (19) formed over the support housing (12) and the fixed scroll (10) and reaches the upper surface of the fixed scroll (10). It is supplied from the upper end of 19) to the storage recess (20). At this time, the space (A) facing the upper surface of the fixed scroll (10) is a low-pressure space partitioned from the high-pressure space (B) by the partition plate (9), and the pressure at both open ends of the oil supply passageway (19) is almost the same. Since they are equal, the lubricating oil is smoothly supplied to the upper surface of the fixed scroll (10). And this storage recess (20)
The lubricating oil that has reached the point is guided by the inclined guide grooves (21a), (21a), ... to the through holes (21), (21), and flows down from the through holes (21) to the Oldham ring (13). ) Each claw (13b), (13b), (13
It is supplied to the periphery of c) and (13c). Because of this, each nail
Lubricating oil flows between (13b), (13b), (13c), (13c) and the groove (17a) formed in the guide part (17), which improves the lubrication of the Oldham coupling (16). Done.

As described above, according to the configuration of this example, after the lubricating oil is once pumped up to the upper side of the fixed scroll (10),
Since this is made to fall on the sliding part of the Oldham coupling (16), the Oldham coupling (16) can be satisfactorily lubricated and wear of the Oldham ring (13) and the guide section (17) can be suppressed. You can With this, with a simple configuration,
The life of each of these members can be extended, the life of the compressor (1) can be extended, and the reliability can be improved. Further, this effect is particularly remarkable when a lubricating oil having a large specific gravity is used. In other words, in the conventional configuration, the lubricating oil with a large specific gravity
After lubricating the sliding part of the orbiting scroll (11), there was a high possibility of falling to the bottom of the casing (2) without lubricating the Oldham coupling (16), but according to the configuration of this example, Even such lubricating oil can be reliably supplied to the sliding portion of the Oldham coupling (16).

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, in this example, the fixed scroll (10) has a shape different from that of the first embodiment described above, and the lubricating oil is dropped onto the sliding portion of the Oldham coupling (16). Since the other configurations are the same as those of the above-described embodiment, only the characteristic portions will be described here.

As shown in FIG. 7, the fixed scroll (10) in the apparatus of this embodiment has a mirror plate (10a) which is not in the shape of a disk, but whose upper and lower edges in FIG. 7 are bent inward. . Then, in the bent portions (10f), (10f), the gutter member (22) as a lubricating oil guide means for dropping and supplying the lubricating oil to the claws (13c), (13c) of the Oldham ring (13), (22) is installed. As shown in FIGS. 7 and 8, the gutter member (22) has a horizontal portion (22) whose one end communicates with the storage recess (20).
a) and the Oldham ring (13) at the outer end of the horizontal part (22a)
And a vertical portion (22b) bent vertically downward from a position facing the claws (13c), (13c). Also, the claws (13b) of the Oldham ring (13) at the left and right side edges in FIG.
Above the (13b), through holes (21), (21) similar to those of the above-described first embodiment are formed.

Therefore, in this example, the through hole (2
Lubricating oil can be dropped and supplied from the storage recess (20) to the periphery of each claw (13b), (13c) of the Oldham ring (13) by the 1), (21) and the gutter members (22), (22). The joint (16) can be satisfactorily lubricated, and as in the case of the first embodiment described above,
Wear of the Oldham ring (13) and the guide portion (17) can be suppressed.

In this example, the gutter member (22) is used as a member for dropping and supplying the lubricating oil supplied to the upper surface of the fixed scroll (10) to the Oldham coupling (16), but instead of this,
As shown in FIG. 9, an arrangement body (25) bent in a substantially L shape may be adopted.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to the drawings. In addition, in this example, the lubricating oil is supplied between the scrolls (10) and (11) so that each wrap
(10b), (11b) is an embodiment in which the present invention is applied to an apparatus provided with a so-called oil injection mechanism for the purpose of improving the sealing property between the (11b) and cooling the working chamber (14), Since the configuration is the same as that of the above-described embodiment, only the characteristic parts will be described here.

First, the oil injection mechanism will be described. This oil injection mechanism is particularly adopted in an inverter compressor whose operating frequency is variable. As shown in FIGS. 10 and 11, the oil is temporarily pumped to the upper surface of the fixed scroll (10). After that, the lubricating oil is supplied between the scrolls (10) and (11) through the injection hole (23) having a relatively small diameter. That is,
An injection passage (24) having the same function as the oil supply passage (19) in each of the above-described embodiments is provided.

Therefore, in the device having such a mechanism, the lubricating oil is applied to the Oldham ring (13) only by forming the through holes (21), (21), ... Described in the first embodiment. Nail (13b),
It can be dropped and supplied to the periphery of (13c). That is, the injection passage (24) can be made to have a function as a supply passage for the injection oil and the oil for Oldham coupling lubrication. Therefore, it is possible to obtain a configuration in which the Oldham mechanism (16) can be reliably lubricated by adding a simple working operation, and it is possible to improve the practicality.

Although the compressor for the refrigerator has been described in this example, the scroll type fluid device (1) of the present invention may be used for a vacuum pump, an expander or the like.

Further, in this example, the through hole (21) for oil supply corresponding to all of the four claws (13b), (13b), (13c) and (13c) provided on the Oldham ring (13). , (21), ..., and the gutter member (22) are provided, but the present invention is not limited to this, and only a pair of claws facing each other may be lubricated, or only one claw may be lubricated. You may

Further, in this example, each scroll (10), (11)
Although the shape is symmetrical, the shape may be asymmetric.

[0049]

As described above, according to the present invention, the following effects are exhibited. According to the invention of claim 1, after guiding a part of the lubricating oil from the lubricating oil supply means to a position above the rotation preventing mechanism, the lubricating oil is directed toward the sliding portion of the rotation preventing mechanism. Since the lubricating oil guide means for dropping and supplying from the vertically upper side is provided, the rotation preventing mechanism can be satisfactorily lubricated, and the wear of the members constituting the mechanism can be suppressed. Therefore, the life of each of these members can be extended with a simple configuration, and the life of the device can be extended and the reliability can be improved.

According to the invention described in claims 2, 3 and 4,
The structure of the lubricating oil guide means can be specifically obtained, and the practicality of the structure for favorably lubricating the rotation preventing mechanism can be improved.

According to the fifth aspect of the invention, when a fluorine-based lubricating oil having a particularly large specific gravity is used, conventionally, the lubricating oil lubricates the sliding portion of the orbiting scroll and then lubricates the rotation preventing mechanism. There is a high possibility that it will fall to the bottom of the casing without doing so, but even if such a lubricating oil is used, the rotation prevention mechanism can be satisfactorily lubricated, so the types of lubricating oil that can be used are expanded. Can be planned.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a scroll type fluid device according to an embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of a fixed scroll according to the first embodiment.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan view showing a support housing.

FIG. 6 is a plan view showing an Oldham ring.

FIG. 7 is a diagram corresponding to FIG. 3 in a second embodiment.

FIG. 8 is a perspective view of a gutter member.

FIG. 9 is a perspective view of a tubular body.

FIG. 10 is a view corresponding to FIG. 3 in the third embodiment.

FIG. 11 is a sectional view taken along line XI-XI in FIG. 10;

[Explanation of symbols]

(1) Scroll type fluid device (2) Sealed casing (8a) Oil pump (8b) Oil passage (10) Fixed scroll (11) Orbiting scroll (10a), (11a) End plate (10b), (11b) Wrap (12 ) Support housing (13) Oldham ring (13b) Upper claw (13c) Lower claw (14) Working chamber (16) Oldham coupling (anti-rotation mechanism) (17a) Groove (19) Oil supply passage (lubricating oil guide means, first (1) Oil supply passage) (21) Through hole (lubricating oil guide means, second oil supply passage) (22) Gutter member (lubricating oil guide means) (25) Pipe (lubricating oil guide means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Hara, No. 1-1 Nishiichitsuya, Settsu City, Osaka Prefecture Daikin Industries, Ltd. Yodogawa Works (72) No. 1 Masahiro Noguchi, Nishiichitsuya City, Osaka Prefecture Daikin Industries, Ltd. Yodogawa Works (72) Inventor Shotaro Mishina 1-1, Nishiichitsuya, Settsu-shi, Osaka Daikin Industries Ltd. Yodogawa Works

Claims (5)

[Claims] 1. A fixed scroll (10) and an orbiting scroll (11) in which spiral wraps (10b), (11b) are erected on the front surfaces of the end plates (10a), (11a), respectively. , (11b) are meshed with each other and housed in the casing (2) so as to form a working chamber (14) between both end plates (10a), (11a), and the orbiting scroll (11) is a rotation preventing mechanism. (16), the orbiting scroll (11) is fixed scroll (1
By revolving with respect to (0) without revolving, the fluid to be compressed is introduced into the working chamber (14) and compressed, and then the working chamber (1
4) A scroll type fluid device that is configured to discharge from the above, and is provided with lubricating oil supply means (8a), (8b) that supplies lubricating oil to the sliding portion of the orbiting scroll (11). In the above, after guiding a part of the lubricating oil from the lubricating oil supply means (8a), (8b) to a position above the rotation prevention mechanism (16), this lubricating oil is slid on the rotation prevention mechanism (16). A scroll type fluid device characterized in that it is provided with lubricating oil guide means (19), (21) and (22) for dropping and supplying from the vertical upper side toward the moving part. 2. The fixed scroll (10) is an orbiting scroll (1).
The rotation prevention mechanism (16) is arranged above 1), and the rotation prevention mechanism (16) has a guide groove (17a) formed in the upper surface of the support housing (12) that supports the orbiting scroll (11).
And an Oldham ring (13b), which is formed on the lower surface of the orbiting scroll (11) and extends in a direction orthogonal to the guide groove (17a), and claws (13b), (13c) fitted in these guide grooves. 13) and the claws (13b), (13c) are fitted in the guide grooves, respectively, and the Oldham ring (13) reciprocates relative to the orbiting scroll (11) and the support housing (12). The orbiting scroll (11) revolves around the fixed scroll (10) without rotating on its axis, and the lubricating oil guide means moves from the support housing (12) to the fixed scroll (10). A first oil supply passageway (19) formed over the upper surface of the fixed scroll (10) to guide the lubricating oil, and an upper end on the upper surface of the fixed scroll (10) and a lower end on the claw of the Oldham ring (13).
Second open to the upper position facing (13b), (13c) respectively
2. The scroll type fluid device according to claim 1, further comprising an oil supply passage (21). 3. The fixed scroll (10) is an orbiting scroll (1).
The rotation prevention mechanism (16) is arranged above 1), and the rotation prevention mechanism (16) has a guide groove (17a) formed in the upper surface of the support housing (12) that supports the orbiting scroll (11).
And an Oldham ring (13b), which is formed on the lower surface of the orbiting scroll (11) and extends in a direction orthogonal to the guide groove (17a), and claws (13b), (13c) fitted in these guide grooves. 13) and the claws (13b), (13c) are fitted in the guide grooves, respectively, and the Oldham ring (13) reciprocates relative to the orbiting scroll (11) and the support housing (12). The orbiting scroll (11) revolves around the fixed scroll (10) without rotating on its axis, and the lubricating oil guide means moves from the support housing (12) to the fixed scroll (10). An oil supply passageway (19) that is formed over the upper surface of the fixed scroll (10) and guides lubricating oil, one end on the upper surface of the fixed scroll (10), and the other end on the claws (13) of the Oldham ring (13).
b) and gutter members opened to the upper position facing (13c) respectively
(22) The scroll type fluid device according to claim 1, characterized in that it is provided. 4. The fixed scroll (10) is an orbiting scroll (1).
The rotation prevention mechanism (16) is arranged above 1), and the rotation prevention mechanism (16) has a guide groove (17a) formed in the upper surface of the support housing (12) that supports the orbiting scroll (11).
And an Oldham ring (13b), which is formed on the lower surface of the orbiting scroll (11) and extends in a direction orthogonal to the guide groove (17a), and claws (13b), (13c) fitted in these guide grooves. 13) and the claws (13b), (13c) are fitted in the guide grooves, respectively, and the Oldham ring (13) reciprocates relative to the orbiting scroll (11) and the support housing (12). The orbiting scroll (11) revolves around the fixed scroll (10) without rotating on its axis, and the lubricating oil guide means moves from the support housing (12) to the fixed scroll (10). An oil supply passageway (19) that is formed over the upper surface of the fixed scroll (10) and guides lubricating oil, one end on the upper surface of the fixed scroll (10), and the other end on the claws (13) of the Oldham ring (13).
2. The scroll type fluid device according to claim 1, further comprising a tubular body (25) opened at positions facing b) and (13c). 5. The scroll type fluid device according to claim 1, 2, 3 or 4, wherein the lubricating oil is a fluorinated oil.