JP2002227779A - Scroll fluid machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll fluid machinery capable of easily replenishing grease to an autorotation preventive mechanism, increasing a quantity of grease retained in a bearing part, and thereby lessening the number of times of replenishing to extend the life of the bearing. SOLUTION: An oil feeding plate 20 is disposed between a pair of bearings 20, 20 to pivotally support a crank shaft 21, filter openings 27 are provided on both sides of the oil feeding plate 26, and a passage 29 to make both filler openings communicate with a grease inlet 28 provided on a housing 1 is provided on the oil feeding plate 26.

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 such as a scroll compressor, a scroll vacuum pump, a scroll expander, and a scroll blower, and more particularly to a scroll fluid machine having a rotation preventing mechanism using a crank. It relates to the structure of grease supply means.

[0002]

2. Description of the Related Art In a scroll fluid machine, a rotation preventing mechanism is provided in order to cause an orbiting scroll to eccentrically rotate without rotating with respect to a fixed scroll. Among the anti-rotation mechanisms, those using a crank are arranged in the axial direction so that the crankshaft and the crankpin connected by the crank arm do not tilt with respect to the fixed scroll or the orbiting scroll. It is pivoted with multiple bearings.

[0003] In these bearings, grease is injected so as to always operate smoothly. However, when the scroll fluid machine operates, the grease injected into the bearing gradually evaporates due to the sliding heat of the bearing or the like, so that the grease must be periodically supplied to the bearing.

When such grease is supplied, in the conventional scroll fluid machine, grease is supplied from the free end side of the crankshaft, that is, the pulley side attached to the main shaft projecting from the housing. ,
It must be done after removing pulleys, cooling fans, cooling ducts, etc. If there is no space to remove them, the main body itself must be removed from the set, carried to a wide place, and the same operation must be performed.

[0005]

As described above, in the conventional scroll fluid machine, when replenishing grease, many parts must be disassembled, and after replenishment, they must be reassembled, which is troublesome. , And is troublesome.

Moreover, in the crank type anti-rotation mechanism, since a plurality of cranks are arranged in the circumferential direction of the main shaft, it is troublesome to supply grease to all of them.

[0007] It is conceivable to connect a grease supply hose or the like to each of the plurality of grease supply units and combine them into one hose, but since the crankshaft rotates, it is conceivable.
In order to connect a grease supply hose or the like to the shaft end, a special joint that can cope with rotation must be used, resulting in a problem that the cost is high and it is difficult to withstand long-term use.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been made to make it possible to easily supply grease to the anti-rotation mechanism and to increase the grease holding amount of a bearing portion. Accordingly, it is an object of the present invention to provide a scroll fluid machine capable of reducing the number of times of supplying grease and extending the life of a bearing.

[0009]

According to the present invention, the above-mentioned problems are solved as follows. (1) The eccentric motion of the orbiting wrap by fitting the fixed wrap of the fixed scroll and the orbiting wrap of the orbiting scroll pivotally supported by the eccentric shaft portion of the main shaft and incorporating the rotation preventing mechanism to each other. The crankshaft is supported by a fixed body such as a fixed scroll or a housing to which the fixed scroll is fixed, and the rotation preventing mechanism is eccentric with respect to the crankshaft. In a scroll fluid machine formed by a crank in which a crank pin is supported by an orbiting scroll, a lubricating body is provided so as to face a side surface of the crank shaft or a bearing that pivotally supports the crank pin. A refueling port is provided on a side surface to be refilled, and the refueling port is provided inside the refueling body with the fixed body and the turning screw. Lumpur, and forming a passage for communicating the grease injection port provided on one of the crank shaft.

(2) In the above item (1), in which the crankshaft or the crankpin is pivotally supported by a plurality of bearings, an oiler is disposed between a pair of adjacent bearings, and Oil supply ports connected to a passage communicating with the grease injection port are provided at portions on both sides facing the bearings.

(3) In the above item (1) or (2), from the crankshaft of the crank to the crankpin,
A grease reservoir is provided, and the grease reservoir connects a grease passage to the crankshaft-side bearing and a grease passage to the crankpin-side bearing.

(4) In any one of the above items (1) to (3), a grease reservoir is formed in the crankshaft or the crankpin, and the grease reservoir is directed in a radial direction provided on the crankshaft or the crankpin. It is made to communicate with the passage in the oil supply body through the through hole.

(5) In any one of the above items (1) to (4), the grease injection port is provided on the outer periphery of the housing outside the oil supply body.

(6) In any one of the above items (1) to (4), the grease injection port is provided at an outer end of the crankshaft.

(7) In any one of the above items (1) to (6), the lubricating body is formed of a disk-shaped plate.

(8) In any one of the above items (1) to (6), the lubricating body may be a bearing or an outer ring fitted in a bearing hole formed in the fixed body or the orbiting scroll through a bearing. And an inner ring fitted externally to a crankshaft or a crankpin fitted therein, and a space formed between the outer ring and the inner ring forms an oil supply port to a bearing, and the outer ring and the inner ring In at least one of the above, a passage is formed to connect the space to the grease inlet.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention applied to a scroll compressor will be described with reference to FIGS. It goes without saying that the present invention is applicable to scroll fluid machines other than the compressor.

The illustrated scroll compressor is basically the same as the conventional scroll compressor. Therefore, only the basic structure of the parts which are not directly related to the present invention and which are well understood by those skilled in the art will be described briefly. Or simply give the name, and a detailed description thereof will be omitted.

This scroll compressor has a housing (1).
A fixed scroll (2) having a function as a lid is fixed to a front end opening (the left side in FIG. 1 is a front side), and a spiral fixed wrap provided on a rear surface of the fixed scroll (2). (3) and housing (1) opposed to it
Orbiting scroll arranged to allow eccentric orbiting motion inside
The closed chamber (8) whose volume gradually decreases toward the center is formed by fitting the spiral fixed wrap (5) provided on the front surface of (4) with each other, and the orbiting scroll (4) By the eccentric orbiting motion, the fluid sucked from the suction port (6) provided on the outer periphery of the fixed scroll (2) is gradually compressed and discharged from the discharge port (7) provided at the center of the fixed scroll (2). It was made.

The center of the rear surface of the orbiting scroll (4) is eccentric at the front end of a main shaft (10) pivotally supported by a pair of front and rear main bearings (9) at the rear center of the housing (1). 11)
A pulley (13) pivotally supported via a swing bearing (12) and protruding rearward from the rear end of the housing (1) and fixedly fitted to a rear end of a main shaft (10), and a belt wrapped around the pulley (13). By rotating the main shaft (10) in a predetermined direction by a motor (not shown) linked via a (not shown) or the like, the orbiting scroll (4)
Is designed to be eccentrically swiveled.

A cooling fan (14) such as a sirocco fan is provided integrally with the main shaft (10). By the rotation of the cooling fan (14), cooling air is connected to a cooling fan cover (15). The cooling fins (16) provided on the front surface of the fixed scroll (2) and the cooling fins (17) provided on the rear surface of the orbiting scroll (4) via a duct (not shown). I have.

In such a scroll compressor, in order to make the orbiting scroll (4) eccentrically orbitally without rotating with respect to the fixed scroll (2), a rotation preventing mechanism is provided.
(18) is provided.

The anti-rotation mechanism (18) is provided with an orbiting scroll (4).
On the same circumference around the main shaft (10) between the rear surface of the housing and the opposing surface of the housing (1) opposed thereto.
Three cranks (19) arranged at angular intervals of °
(Only one of them is shown).

As shown in FIG. 2, each crank (19) has two front and rear bearings (here, ball bearings) mounted on a housing (1).
(20) A crankshaft (21) pivotally supported so as to be parallel to the main shaft (10) with (20), a crank arm (22) protruding at a front end thereof in a direction perpendicular to the crankshaft, and a crank. arm
The orbiting scroll protruding from the front end of (22) and (4)
And a crank pin (24) which is pivotally supported by a pair of front and rear bearings (23), and which is parallel and eccentric to the crank shaft (21).

The crankshaft (21) and the crankpin (24) are
The two bearings (20), (20), (23) and (23) are pivotally supported on the housing (1) and the orbiting scroll (4) in order to prevent their axes from tilting. is there. However, with one or more bearings, the crankshaft (2
1) Or the crank pin (24) may be pivoted.

Conventionally, when grease is supplied to the bearings (20) and (20) as described above, a dustproof cap (25) attached to the housing (1) so as to cover the rear end surface of the rear bearing (20). And then the cooling fan (14), cooling fan cover (15), pulley (13), etc. located behind it had to be removed, but according to the present invention, the following configuration is adopted. This not only eliminates such inconvenience, but also provides many other advantages.

That is, in FIG. 2 showing the first embodiment of the present invention, a disk-shaped oil supply plate (oil supply member) (26) also serving as a spacer is provided between the front and rear bearings (20) (20). , Crankshaft (2
1), and the front and rear bearings (20) (2)
(0) are provided on the front and rear surfaces opposite to each other, and axial refueling ports (27) and (27) are provided, and the inner ends of the refueling ports (27) and (27) are connected to the housing.
A grease inlet (28) provided at a position corresponding to the oil supply plate (26) on the outer peripheral surface of (1) is communicated with a passage (29). The lubrication plate (26) is preferably made of aluminum light alloy, iron, or the like in order to attach the bearings (20), (20) with preload.

The passage (29) is provided with a crankshaft (2) formed in an oil supply plate (26) so as to connect the front and rear oil supply ports (27) and (27).
An axial through hole (30) parallel to 1), a radial through hole (31) drilled in the oil supply plate (26) in the radial direction so as to be orthogonal to the axial through hole (30), and communicating with the inner and outer ends thereof The annular grooves (32) and (33) provided on the inner and outer peripheral surfaces of the oil supply plate (26) and the outer annular grooves (3
The grease nipple (3) is formed in the housing (1) in communication with the grease nipple (3) and substantially perpendicular to the crankshaft (21), and has a grease inlet (28) and a check valve (not shown) at the outer end. 34)
And a communication hole (35) in the radial direction in which is fitted.

An axial hole-shaped grease reservoir (36) is formed on the axis of the crankshaft (21), and an intermediate portion of the grease reservoir (36) in the axial direction is formed on the crankshaft (21). It communicates with the annular groove (32) in the inner peripheral surface of the oil supply plate (26) via the radial conduction hole (37) provided.

The front end of the grease reservoir (36) penetrates through the inside of the crank arm (22) and the crank pin (24), and is open to the front end of the crank pin (24). Through the gap between the inner bottom of the holding hole (39) of the crank pin (24) drilled in (4) and the front end face of the crank pin (24), the front and rear bearings (23) (23) They are communicating sequentially.

The rear end of the grease reservoir (36) is a rear bearing holding plate.
(40) is closed by a bolt (41) for fastening the rear end of the crankshaft (21).

(42) is a front bearing holding plate, and (43) is a seal for preventing grease from leaking.

Since the first embodiment is configured as described above, the grease injected from the grease injection port (28)
Through the passage (29), the front and rear bearings (20) on the housing (1) side
(20), enter the grease reservoir (36) of the crankshaft (21) from the radial conduction hole (37), further pass through the guide hole (38), and move forward and backward on the orbiting scroll (4) side. Is supplied to the bearings (23) and (23).

The grease inlet (28) is provided on the outer periphery of the housing, so that when the grease is injected, the dustproof cap (2)
5) Remove the cooling fan (14), cover (15), pulley
(13) There is no need to disassemble or the like, and the grease injection operation can be easily performed.

When the grease in the bearings (20), (20), (23), (23) decreases due to evaporation or the like, the grease pool (36) and the guide hole (3)
8) Grease accumulated in the bearing (20) through radial conduction holes (37) etc. by centrifugal force due to rotation of the crankshaft (21)
(20), and the bearings (23) and (23) are automatically supplied to the bearings (23) and (23) through the guide holes (38).
Is maintained for a long period of time, the number of times of replenishing grease is reduced, and the time of replenishment can be lengthened.

FIG. 3 shows a second embodiment of the present invention.
It is to be noted that the same members as those in the first embodiment are denoted by the same reference numerals and are not illustrated, and detailed description thereof is omitted (the same applies to the third embodiment shown in FIG. 4). And).

In this embodiment, the grease nipple (34) provided on the housing (1) in the first embodiment,
Radial communication hole (35), axial hole in oil supply plate (26)
(30) The radial through hole (31) outside the outer ring and the annular groove (3
3) etc. are omitted, and the rear bearing holding plate (4
A bolt (44) for fixing the (0) to the rear end of the crankshaft (21) is not a simple bolt, but a grease having a grease inlet (28) at the tip, similar to the above-described grease nipple (34). It is provided with a nipple (45).

(46) is an opening / closing lid detachably provided at the center of the dustproof cap (25). By opening the lid, grease can be injected into the grease nipple (45). The grease reservoir (36) is divided into two branches, one of which is a radial through hole (37), an annular groove (32), and a radial through hole.
(31), and through the axial through hole (30), the oil is supplied to the front and rear bearings (20) and (20) from the filler holes (27) and (27), and the other is supplied to the guide hole (3
Through 8), it is sequentially supplied to the front and rear bearings (23) (23).

The second embodiment is suitable for application when there is sufficient space between the grease injection port (28) and the cooling fan (14) for performing the grease injection operation. There are advantages that the structure can be simplified as compared with the first embodiment, there is no need to perform fine processing such as drilling on the housing (1), and projections can be eliminated from the outer periphery of the housing (1). .

FIG. 4 shows a third embodiment of the present invention.

In this example, in the same as in the second embodiment, an axial through hole (4) communicating with the grease reservoir (36) on the crankshaft (21) side is provided at the center of the crankpin (24).
An oiling plate (48) similar to the oiling plate (26) is provided between the bearings (23) and (23) before and after the hole 7) is bored and externally fitted to the crankpin (24). Refueling plate (48) has front and rear refueling ports (49) (49)
A plurality of axial through-holes (50) connecting each other, and a plurality of radial through-holes (52) communicating these with an annular groove (51) provided on the inner peripheral surface are provided, and further, a crankpin ( A plurality of radial conduction holes (53) for communicating the axial through holes (47) with the annular groove (51) are provided on the outer peripheral portion of the (24).

Thus, the bearing on the orbiting scroll (4) side
(23) and (23) have the same principle that grease is supplied to the bearings (20) and (20) on the housing (1) side, that is, the crankpin (24) is centered on the crankshaft (21). Due to the centrifugal force when rotating as above, grease in the axial through hole (47) causes the radial through hole (53), the annular groove (51), the radial through hole (52), and the axial through hole ( 50) to be supplied automatically.

FIGS. 5 and 6 show a fourth embodiment of the present invention.

In this example, a bearing hole drilled in a housing (1) as shown in FIG. 6 in place of the lubrication plates (26) and (48) is the same as that in the third embodiment. (54) and an outer ring (56) fitted in a bearing hole (55) drilled in the orbiting scroll (4), and are arranged concentrically so as to form a required space (57) inside the outer ring (56). And a crankshaft (21) fitted into each bearing hole (54) (55) via a bearing (20) (20) (23) (23)
And a lubricating body (59) (60) including an inner ring (58) externally fitted to the crankpin (24), and a space (57) formed between the outer ring (56) and the inner ring (58), Front and rear bearings (20) (20) (23) (23)
And a grease reservoir is formed.

Each inner ring (58) of the refueling bodies (59) and (60) has a space (5).
A plurality of radial passages (61) communicating the grease reservoir (36) and the grease inlet (28) through the grease reservoir (36) and the axial through hole (47), and an annular groove (62) communicating with the inner ends thereof. Are provided.

According to the fourth embodiment, the lubricating body (59)
Each inner ring (58) of (60) is the inner race (20a) (23) of the bearing (20) (23).
a) together with the outer ring (56) and bearings (20) (2) of the lubricating bodies (59) (60)
3) Since it can rotate relative to the outer race (20b) (23b),
There is an advantage that the lubricating bodies (59) and (60) do not hinder the rotation of the bearings (20) and (23), and the bearings (20) and (23) can always rotate smoothly.

When the grease nipple (45) shown in FIG. 5 is provided on the housing (1) or the orbiting scroll (4) as in a grease nipple (34) shown in FIG. ), An annular groove communicating with the communication hole (39) (see FIG. 2) and one or more radial passages communicating therewith.
(All not shown) may be provided.

The present invention can be implemented in various forms other than the above four embodiments.

For example, the crankshaft (21) is connected to the housing
The fixed scroll (2) may be pivotally supported instead of (1), and the present invention can be applied to such a case.

The present invention can also be applied to a system in which only one bearing is used to pivotally support a crankshaft or a crankpin. In this case, the lubrication plate may be provided so as to face the side surface of the bearing, and the lubrication port may be provided only on the side surface of the lubrication plate facing the bearing.

Further, the grease injection port may be provided on the orbiting scroll.

[0052]

Next, specific effects of the invention described in each claim will be listed.

All claims: grease can be easily supplied to the bearing of the anti-rotation mechanism, and the amount of grease held in the bearing portion can be increased by storing grease in the grease reservoir. The number of times of replenishment can be reduced, and the life of the bearing can be extended.

Claim 2: The grease can be efficiently supplied to the plurality of bearings, and the lubricating plate is interposed as a spacer between the adjacent bearings to increase the distance between the adjacent bearings. Can be stably supported.

Claim 3: Grease can be efficiently replenished simultaneously to the bearing on the fixed body side supporting the crankshaft and the bearing on the fixed scroll side supporting the crankpin.

The grease holding amount in the bearing portion can be increased, and it is not necessary to supply grease for a long time.

Also, the grease accumulated in the grease reservoir in the crankshaft or the crankpin is automatically supplied to the bearing through the radial passage due to the centrifugal force at the time of rotation of the crankshaft. Thus, the number of times of supplying grease can be reduced, and the life of the bearing can be prolonged.

Claim 5: It is possible to easily supply grease to the bearing from the outside of the housing, and it is not necessary to remove the cooling fan, the cover, the pulley, and the like from the main shaft as in the conventional case. Work can be performed quickly.

Claim 6: The structure can be further simplified, and since there is no need to provide a grease injection port on the outer peripheral surface of the housing, it is not necessary to perform a fine drilling operation on the housing, and the outer peripheral surface of the housing is formed with a projection. The appearance can be beautiful without any.

Claim 7: Since the lubricating body is a disk-shaped plate, it can be easily mounted on the bearing portion.

Claim 8: Since each inner ring of the lubricating body can rotate relative to the outer race of the lubricating body and the outer race of the bearing together with the inner race of the bearing, the lubricating body does not hinder the rotation of the bearing. The bearing can always rotate smoothly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional side view of a main part of FIG.

FIG. 3 is an enlarged vertical sectional side view of a portion similar to FIG. 2 in a second embodiment of the present invention.

FIG. 4 is an enlarged vertical sectional side view of a portion similar to FIG. 2 in a third embodiment of the present invention.

FIG. 5 is an enlarged vertical sectional side view of a portion similar to FIG. 2 in a fourth embodiment of the present invention.

FIG. 6 is a perspective view showing an outer ring and an inner ring in the oiling body.

[Explanation of symbols]

 (1) Housing (fixed body) (2) Orbiting scroll (fixed body) (3) Fixed wrap (4) Orbiting scroll (5) Orbiting wrap (6) Suction port (7) Discharge port (8) Closed chamber (9) Main bearing (10) Main shaft (11) Eccentric shaft (12) Slewing bearing (13) Pulley (14) Cooling fan (15) Cooling fan cover (16) (17) Cooling fin (18) Anti-rotation mechanism (19) Crank (20) Bearing (20a) Inner race (20b) Outer race (21) Crankshaft (22) Crank arm (23) Bearing (23a) Inner race (23b) Outer race (24) Crank pin (25) Dustproof cap (26 ) Oil plate (oil filler) (27) Oil port (28) Grease inlet (29) Passage (30) Axial through hole (31) Radial through hole (32) (33) Annular groove (34) Grease nipple ( 35) Communication hole (36) Grease reservoir (37) Conduction hole (38) Guide hole (39) Holding hole (40) Rear bearing holding plate (41) Bolt (42) Front bearing holding plate (43) Seal (44) Bolt (45) Grease nipple (46) Open / close lid (47) Axial through hole (48) Oil filler plate (49) Oil filler port (50) Axial through hole (51) (52) Radial through hole (53) Conducting hole (54) (55) Bearing hole (56) Outer ring (57) Space (58) Inner ring (59) (60) Lubricating body (61) Passage (62) Annular groove

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H029 AA02 AA15 BB10 BB32 BB34 CC08 CC32 3H039 AA02 BB08 BB11 CC03 CC13 CC15 CC27 CC41

Claims (8)

[Claims] 1. A fixed wrap in a fixed scroll,
The closed chamber in which the fluid volume changes with the eccentric motion of the orbiting wrap by fitting the orbiting wrap in the orbiting scroll that is pivotally supported by the eccentric shaft part of the main shaft and incorporates the rotation preventing mechanism with each other. A crank, wherein the crankshaft is supported by a fixed body such as a fixed scroll or a housing to which the fixed scroll is fixed, and a crankpin eccentric to the crankshaft is supported by the orbiting scroll. In the scroll fluid machine formed by, a lubricating body is provided so as to face a side surface of a bearing that pivotally supports the crankshaft or the crankpin, and a lubrication port is provided on a side surface of the lubricating body that faces the bearing, and In the refueling body, the refueling port is provided in any of the fixed body, the orbiting scroll, and the crankshaft. A scroll fluid machine wherein a passage communicating with a grease inlet is formed. 2. A crankshaft or a crankpin which is pivotally supported by a plurality of bearings.
The lubricating body according to claim 1, wherein a lubricating body is disposed between the pair of bearings, and lubricating ports connected to a passage communicating with the grease inlet are provided at portions on both side surfaces of the lubricating body facing the respective bearings. Scroll fluid machinery. 3. A grease reservoir is provided from the crankshaft to the crankpin of the crank, and the grease reservoir defines a grease passage to the crankshaft-side bearing and a grease passage to the crankpin-side bearing. 3. The scroll fluid machine according to claim 1, wherein the scroll fluid machines are in communication with each other. 4. A grease reservoir is formed in a crankshaft or a crankpin, and the grease reservoir is formed through a radially-directed through hole provided in the crankshaft or the crankpin.
The scroll fluid machine according to any one of claims 1 to 3, wherein the scroll fluid machine communicates with a passage in an oil supply body. 5. The scroll fluid machine according to claim 1, wherein the grease injection port is provided on an outer periphery of the housing outside the oil supply body. 6. The scroll fluid machine according to claim 1, wherein the grease inlet is provided at an outer end of the crankshaft. 7. The scroll fluid machine according to claim 1, wherein the oil supply body is formed of a disk-shaped plate. 8. An outer ring in which a lubricating body is internally fitted in a bearing hole formed in a fixed body or an orbiting scroll, and an inner ring in which a lubrication body is externally fitted to a crankshaft or a crankpin fitted to the bearing hole via a bearing. And a refueling port for a bearing is formed by a space formed between the outer ring and the inner ring, and at least one of the outer ring and the inner ring, the space is used as a grease inlet. The scroll fluid machine according to any one of claims 1 to 6, wherein a passage for communication is formed.