JP4105850B2 - Scroll fluid machinery - Google Patents

Description

[0001]
BACKGROUND 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 structure of a means for supplying grease to a bearing of an anti-rotation mechanism using a crank in the scroll fluid machine. .
[0002]
[Prior art]
In the scroll fluid machine, an anti-rotation mechanism is provided in order to cause the orbiting scroll to rotate eccentrically without rotating with respect to the fixed scroll.
Among these anti-rotation mechanisms, those using a crank are arranged in the axial direction so that the crank shaft and the crank pin connected by the crank arm do not tilt with respect to the fixed scroll, the orbiting scroll, or the like. It is pivotally supported by multiple bearings.
[0003]
These bearings are infused with grease in order to always operate smoothly. However, since the grease injected into the bearing gradually evaporates due to the sliding heat of the bearing during the operation of the scroll fluid machine, the grease must be periodically supplied to the bearing.
[0004]
When replenishing such grease, in the conventional scroll fluid machine, the grease is supplied from the free end side of the crankshaft, that is, the pulley side attached to the main shaft protruding from the housing. It must be done after removing the cooling fan, cooling duct, etc. If there is no space to remove them, the main body itself must be removed from the set and transported to a large area to perform the same operation.
[0005]
[Problems to be solved by the invention]
As described above, in the conventional scroll fluid machine, many parts must be disassembled at the time of replenishing grease, and they must be reassembled after the replenishment, which is troublesome and troublesome.
[0006]
In addition, in the crank-type rotation prevention mechanism, since a plurality of cranks are arranged in the circumferential direction of the main shaft, there is a problem that all of these must be replenished with grease.
[0007]
It is conceivable to connect a grease supply hose or the like to each of the plurality of grease supply units and consolidate them into a single hose. However, since the crankshaft rotates, a grease supply hose or the like is attached to the shaft end. In order to connect the cables, a special joint that can handle rotation must be used, which increases the cost and is difficult to withstand long-term use.
[0008]
In view of the above problems of the prior art, the present invention makes it possible to easily supply grease to the rotation prevention mechanism and increase the amount of grease held in the bearing portion. It is an object of the present invention to provide a scroll fluid machine that can reduce the number of replenishment times of grease and extend the life of a bearing.
[0009]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) 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 a rotation prevention mechanism. A closed chamber in which the fluid volume changes is formed, and the rotation prevention mechanism is fixed to the fixed scroll or a fixed body made of a housing or the like to which the fixed scroll is fixed, and the crankshaft is eccentric with respect to the crankshaft. In a scroll fluid machine in which a crankpin is formed by a crank that is supported by an orbiting scroll, an oil supply body is provided so as to face a side surface of the bearing that pivotally supports the crankshaft or the crankpin, and the oil supply body faces the bearing. An oil supply port is provided on a side surface of the oil supply body, and the oil supply port is provided in the oil supply body with the fixed body and the swivel disk. Lumpur, and forming a passage for communicating the grease injection port provided on one of the crank shaft.
[0010]
(2) In the above item (1), the crankshaft or the crankpin is pivotally supported by a plurality of bearings, an oil supply body is disposed between a pair of adjacent bearings, and on both side surfaces of the oil supply body. Refueling ports connected to the passages communicating with the grease injection ports are respectively provided in portions facing the respective bearings.
[0011]
(3) In the above item (1) or (2), a grease reservoir is provided from the crankshaft to the crankpin in the crank, and this grease reservoir causes a grease passage to the bearing on the crankshaft side and the crankpin side. The grease passage to the bearing is in communication with each other.
[0012]
(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 provided with a conduction hole facing the radial direction provided in the crankshaft or the crankpin. To communicate with the passage in the fueling body.
[0013]
(5) In any one of the above items (1) to (4), the grease inlet is provided on the outer periphery of the housing outside the fuel filler.
[0014]
(6) In any one of the above items (1) to (4), the grease injection port is provided at the outer end of the crankshaft.
[0015]
(7) In any one of the above items (1) to (6), the oil filler is formed of a disk-shaped plate material.
[0016]
(8) In any one of the above items (1) to (6), the oil filler is fitted into the outer ring fitted in the bearing hole formed in the fixed body or the orbiting scroll, and the bearing hole is fitted through the bearing. And an inner ring that is externally fitted to the crankshaft or a crankpin, and a space formed between the outer ring and the inner ring forms an oil supply port for the bearing, and at least the outer ring and the inner ring Either one is formed with a passage for communicating the space with the grease inlet.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention applied to a scroll compressor will be described with reference to FIGS. 1 and 2. Needless to say, the present invention can be applied to other scroll fluid machines other than the compressor.
[0018]
The scroll compressor shown in the figure is basically the same as the conventional one, so that only the basic structure will be briefly described for the parts not directly related to the present invention that are well understood by the related engineers. Alternatively, the name is simply given and the detailed description is omitted.
[0019]
In this scroll compressor, a fixed scroll (2) having a function as a lid is fixed to a front end opening (the left side in FIG. 1 is the front) of the housing (1). The fixed scroll (2) A spiral fixed wrap (3) provided on the rear surface and a spiral fixed wrap provided on the front of the orbiting scroll (4) disposed in the housing (1) so as to be capable of eccentric orbiting so as to face the spiral fixed wrap (3) And (5) are mutually fitted to form a sealed chamber (8) whose volume is gradually reduced toward the center direction, and the outer peripheral portion of the fixed scroll (2) by the eccentric orbiting motion of the orbiting scroll (4). The fluid sucked in from the suction port (6) provided in is gradually compressed and discharged from the discharge port (7) provided in the center of the fixed scroll (2).
[0020]
The central part of the rear surface of the orbiting scroll (4) is connected to the eccentric shaft part (11) at the front end of the main shaft (10) pivotally supported by a pair of front and rear main bearings (9, 9) in the rear center of the housing (1). A pulley (13) pivotally supported via a slewing bearing (12) and projecting rearward from the rear end of the housing (1), and a belt ( By rotating a main shaft (10) in a predetermined direction by a motor (not shown) linked through an unillustrated) or the like, the orbiting scroll (4) can be eccentrically swung.
[0021]
The spindle (10) is integrally provided with a cooling fan (14) such as a sirocco fan, and the cooling fan (14) rotates to cause cooling air to be connected to the cooling fan cover (15) ( Via a not-shown cooling fan (16) provided on the front surface of the fixed scroll (2), the cooling fin (17) provided on the rear surface of the orbiting scroll (4), and the like.
[0022]
In such a scroll compressor, an anti-rotation mechanism (18) is provided to cause the orbiting scroll (4) to perform an eccentric orbiting movement without rotating with respect to the fixed scroll (2).
[0023]
The anti-rotation mechanism (18) has an angular interval of 120 ° on the same circumference centered on the main shaft (10) between the rear surface of the orbiting scroll (4) and the opposing surface of the housing (1) facing it. And three cranks (19) (only one of which is shown).
[0024]
As shown in FIG. 2, each crank (19) is pivotally supported so that it has two front and rear bearings (here, ball bearings) (20) and (20) parallel to the main shaft (10) in the housing (1). A crankshaft (21), a crank arm (22) projecting from the front end of the crankshaft (21) in a direction perpendicular to the crankshaft (21), a front end of the crank arm (22) projecting from the front, and an orbiting scroll (4) And a crank pin (24) which is pivotally supported by a pair of front and rear bearings (23) and (23) and which is parallel and eccentric to the crank shaft (21).
[0025]
The crankshaft (21) and the crankpin (24) are pivotally supported by the housing (1) and the orbiting scroll (4) with two bearings (20), (20), (23) and (23), respectively. Is to prevent the tilt of those axes. However, the crankshaft (21) or the crankpin (24) may be pivotally supported by one or more bearings.
[0026]
Conventionally, when replenishing grease to the bearings (20) and (20) as described above, the dust cap (25) attached to the housing (1) is removed so as to cover the rear end surface of the rear bearing (20), Next, the cooling fan (14), the cooling fan cover (15), and the pulley (13), etc., located behind them had to be removed, but according to the present invention, the following configuration was adopted. Not only are these inconveniences eliminated, but there are many other benefits.
[0027]
That is, in FIG. 2 showing the first embodiment of the present invention, a disc-shaped oil supply plate (oil supply body) (26) that also serves as a spacer is provided between the front and rear bearings (20) and (20). (21) are provided on the front and rear surfaces of the oil supply plate (26) facing the front and rear bearings (20) and (20), and axial oil supply ports (27) and (27) are provided, and these oil supply ports (27) The inner end of (27) is communicated with a grease inlet (28) provided at a location corresponding to the oil supply plate (26) on the outer peripheral surface of the housing (1) through a passage (29). The oiling plate (26) is preferably made of aluminum light alloy, iron, or the like because it is attached to the bearings (20) and (20) with preload.
[0028]
The passage (29) includes an axial through hole (30) parallel to the crankshaft (21), which is formed in the oil supply plate (26) so as to connect the front and rear oil supply ports (27), (27). A radial through hole (31) drilled in the oil supply plate (26) in the radial direction so as to be orthogonal thereto, and provided on the inner and outer peripheral surfaces of the oil supply plate (26) so as to communicate with the inner and outer ends thereof. The annular groove (32) (33) communicates with the outer annular groove (33) and is formed in the housing (1) so as to be substantially orthogonal to the crankshaft (21). The inlet (28) and a radial communication hole (35) fitted with a grease nipple (34) having a check valve (not shown) are fitted.
[0029]
A shaft hole-shaped grease reservoir (36) is drilled on the axis of the crankshaft (21), and an intermediate portion in the axial direction of the grease reservoir (36) is a radius drilled in the crankshaft (21). It communicates with the annular groove (32) on the inner peripheral surface of the oil supply plate (26) through the direction conduction hole (37).
[0030]
Further, the front end of the grease reservoir (36) penetrates through the crank arm (22) and the crank pin (24), opens to the front end of the crank pin (24), and the orbiting scroll (4). Through the gap between the inner bottom of the holding hole (39) of the crankpin (24) drilled in the front and the front end face of the crankpin (24), and then communicate with the front and rear bearings (23) (23) in sequence. ing.
[0031]
The rear end of the grease reservoir (36) is closed by a bolt (41) that secures the rear bearing retainer plate (40) to the rear end of the crankshaft (21).
[0032]
(42) is a front bearing retainer plate, and (43) is a seal for preventing grease from leaking.
[0033]
Since the first embodiment is configured as described above, the grease injected from the grease injection port (28) passes through the passage (29), and the front and rear bearings (20) and (20) on the housing (1) side. ) And into the grease reservoir (36) in the crankshaft (21) from the radial conduction hole (37), and further through the guide hole (38), the front and rear bearings on the orbiting scroll (4) side (23) is supplied to (23).
[0034]
Since the grease inlet (28) is provided on the outer periphery of the housing, the dust cap (25) can be removed and the cooling fan (14), cover (15), pulley (13), etc. can be disassembled when grease is injected. It is not necessary to do this, and the grease injection operation can be easily performed.
[0035]
Further, when the grease in the bearings (20), (20), (23) and (23) decreases due to evaporation or the like, the grease accumulated in the grease reservoir (36), the guide hole (38), etc. By centrifugal force due to rotation, it is automatically supplied to the bearings (20) and (20) through the radial conduction holes (37) etc. and to the bearings (23) and (23) via the guide holes (38), respectively. Therefore, the grease is held in the bearings (20) and (23) for a long period of time, the number of times of replenishing the grease is reduced, and the replenishment timing can be lengthened.
[0036]
FIG. 3 shows a second embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted (the same applies to the third embodiment shown in FIG. 4). And).
[0037]
In this embodiment, the grease nipple (34) provided in the housing (1) in the first embodiment, the radial communication hole (35), the outer side of the axial through hole (30) in the oil supply plate (26). Bolts (44) that secure the rear bearing retainer plate (40) to the rear end of the crankshaft (21) instead of all of the radial direction through holes (31) and the outer peripheral annular grooves (33), etc. Is not a mere bolt, but is provided with a grease nipple (45) whose tip is a grease inlet (28) similar to the above-described grease nipple (34).
[0038]
(46) is an open / close lid that is detachably provided in the center of the dust cap (25) .Opening this lid allows grease to be injected into the grease nipple (45). (36) divided into two branches, one through the radial through hole (37), the annular groove (32), the radial through hole (31), and the axial through hole (30), 27) From (27), it is supplied to the front and rear bearings (20), (20), and the other is sequentially supplied to the front and rear bearings (23), (23) through the guide hole (38).
[0039]
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 embodiment, that the housing (1) does not need to be subjected to fine processing such as perforation, and that protrusions can be eliminated from the outer periphery of the housing (1).
[0040]
FIG. 4 shows a third embodiment of the present invention.
[0041]
In this example, in the same thing as in the second embodiment, an axial through hole (47) communicating with the grease reservoir (36) on the crankshaft (21) side is formed in the center of the crankpin (24). An oil supply plate (48) similar to the oil supply plate (26) is provided between the front and rear bearings (23) and (23) externally fitted to the crankpin (24). The oil supply plate (48) communicates with a plurality of axial through holes (50) connecting the front and rear oil supply ports (49) (49) and an annular groove (51) provided on the inner peripheral surface. A plurality of radial through holes (52), and a plurality of radial through holes (52) communicating the axial through holes (47) with the annular grooves (51) on the outer periphery of the crankpin (24). 53).
[0042]
As a result, the bearings (23) and (23) on the orbiting scroll (4) side are also subjected to the same principle as when grease is supplied to the bearings (20) and (20) on the housing (1) side, that is, the crankpin. Due to the centrifugal force when (24) rotates around the crankshaft (21), the grease in the axial through-hole (47) is moved into the radial conduction hole (53), the annular groove (51), and the radial passage. It is automatically supplied through the hole (52) and the axial through hole (50).
[0043]
5 and 6 show a fourth embodiment of the present invention.
[0044]
In this example, a bearing hole (54) drilled in the housing (1) as shown in FIG. 6 is used instead of the oil supply plates (26) (48) in the same thing as in the third embodiment. And an outer ring (56) fitted in a bearing hole (55) bored in the orbiting scroll (4), and a concentric arrangement so as to form a required space (57) inside thereof, and A crankshaft (21) fitted to each bearing hole (54) (55) via a bearing (20) (20) (23) (23) and an inner ring (58) fitted externally to the crankpin (24); The front and rear bearings (20), (20), (23), (23) are provided by a space (57) formed between the outer ring (56) and the inner ring (58). ) And a grease reservoir are formed.
[0045]
Each inner ring (58) of the oil filler (59) (60) has a plurality of radial spaces (57) communicating with the grease inlet (28) through the grease reservoir (36) and the axial through hole (47). The passage (61) and an annular groove (62) communicating with the inner ends thereof are provided.
[0046]
According to the fourth embodiment, the inner rings (58) of the oil fillers (59) and (60), together with the inner races (20a) and (23a) of the bearings (20) and (23), the oil fillers (59) (60 ) And the outer race (20b) (23b) of the bearing (20) (23) can rotate relative to the outer ring (56), so that the lubricator (59) (60) rotates the bearing (20) (23). There is an advantage that the bearings (20) and (23) can always rotate smoothly.
[0047]
In place of the grease nipple (45) shown in FIG. 5, when the housing (1) or the orbiting scroll (4) is provided like the grease nipple (34) shown in FIG. 2, the outer periphery of the outer ring (56) An annular groove communicating with the communication hole 39 (see FIG. 2) and one or a plurality of radial passages (none of which are shown) may be provided on the surface.
[0048]
In addition to the above four embodiments, the present invention can be implemented in various forms.
[0049]
For example, the crankshaft (21) may be pivotally supported not by the housing (1) but by the fixed scroll (2). In such a case, the present invention can of course be applied.
[0050]
In addition, the present invention can be applied to a structure in which a crankshaft and a crankpin are pivotally supported by only one bearing.
In this case, an oil supply plate may be provided so as to face the side surface of the bearing, and an oil supply port may be provided only on the side surface of the oil supply plate facing the bearing.
[0051]
Further, the grease inlet may be provided in the orbiting scroll.
[0052]
【The invention's effect】
Next, the specific effects in the invention described in each claim are listed.
[0053]
All claims: It is possible to easily replenish grease to the bearing of the anti-rotation mechanism and to increase the amount of grease retained in the bearing portion by storing the grease in the grease reservoir, so the number of grease replenishments Can be reduced, and the life of the bearing can be extended.
[0054]
Claim 2: The grease can be efficiently supplied to a plurality of bearings, and the oil supply plate is interposed as a spacer between the adjacent bearings, and the interval between the adjacent bearings is increased to stabilize the crankshaft. Can be supported.
[0055]
The grease can be efficiently replenished simultaneously to the bearing on the fixed body supporting the crankshaft and the bearing on the fixed scroll supporting the crankpin.
[0056]
Claim 4: The amount of grease retained in the bearing portion can be increased, and it is not necessary to replenish grease for a long period of time.
[0057]
In addition, the grease accumulated in the grease reservoir in the crankshaft or crankpin is automatically supplied to the bearing through the radial passage due to the centrifugal force during rotation of the crankshaft. The number of times of replenishment can be reduced, and the life of the bearing can be extended.
[0058]
Claim 5: The grease can be easily replenished to the bearing from the outside of the housing, and it is not necessary to remove the cooling fan, the same cover, the pulley, etc. from the main shaft as in the prior art. Can be done.
[0059]
Claim 6: The structure can be further simplified, and it is not necessary to provide a grease injection port on the outer peripheral surface of the housing. Appearance can be made.
[0060]
Claim 7: Since the oil supply body is a disk-shaped plate material, it can be easily mounted on the bearing portion.
[0061]
Claim 8: Since each inner ring of the lubrication body can rotate relative to the outer ring of the lubrication body and the outer race of the bearing together with the inner race of the bearing, the lubrication body does not hinder the rotation of the bearing, and the bearing is always It can rotate smoothly.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a first embodiment of the present invention.
FIG. 2 is an enlarged vertical sectional side view of the main part of FIG.
FIG. 3 is an enlarged longitudinal sectional side view of the same portion as FIG. 2 in the second embodiment of the present invention.
FIG. 4 is an enlarged longitudinal sectional side view of the same portion as FIG. 2 in the third embodiment of the present invention.
FIG. 5 is an enlarged longitudinal sectional side view of the same portion as FIG. 2 in the fourth embodiment of the present invention.
FIG. 6 is a perspective view showing an outer ring and an inner ring in the fueling body.
[Explanation of symbols]
(1) Housing (fixed body)
(2) Orbiting scroll (fixed body)
(3) Fixed wrap
(4) Orbiting scroll
(5) Turning lap
(6) Suction port
(7) Discharge port
(8) Sealed room
(9) Main bearing
(10) Spindle
(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) Outside race
(21) Crankshaft
(22) Crank arm
(23) Bearing
(23a) Inner race
(23b) Outer race
(24) Crank pin
(25) Dust-proof cap
(26) Oiling plate (oiling body)
(27) Refueling 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 retainer plate
(41) Bolt
(42) Front bearing retainer plate
(43) Seal
(44) Bolt
(45) Grease nipple
(46) Open / close lid
(47) Axial through hole
(48) Oiling plate
(49) Refueling port
(50) Axial through hole
(51) Annular groove
(52) Radial through hole
(53) Conduction hole
(54) (55) Bearing hole
(56) Outer ring
(57) Space
(58) Inner ring
(59) (60) Refueling body
(61) Passage
(62) Annular groove

Claims (8)

The fixed wrap in the fixed scroll and the orbiting wrap in the orbiting scroll that is pivotally supported by the eccentric shaft portion of the main shaft and that incorporates the anti-rotation mechanism are fitted to each other, so that the fluid is accompanied by the eccentric movement of the orbiting wrap. A closed chamber having a variable volume is formed, and the rotation prevention mechanism includes a fixed scroll or a fixed body made of a housing or the like to which the fixed scroll is fixed, and a crank pin that is eccentric with respect to the crank shaft. In a scroll fluid machine formed by a crank supported by a turning scroll,
An oil filler is provided so as to face a side surface of the bearing pivotally supporting the crankshaft or the crankpin, and an oil filler port is provided on a side surface of the fuel filler body facing the bearing, and the oil filler port is provided in the oil filler body. A scroll fluid machine characterized in that a passage communicating with a grease inlet provided in any one of the fixed body, the orbiting scroll, and the crankshaft is formed. In a structure in which a crankshaft or a crankpin is pivotally supported by a plurality of bearings, an oil filler is disposed between a pair of bearings adjacent to each other, and grease is provided at portions facing both the bearings on both side surfaces of the oil filler. 2. The scroll fluid machine according to claim 1, further comprising an oil supply port connected to a passage communicating with the injection port. A grease reservoir is provided from the crankshaft to the crankpin in the crank, and the grease reservoir causes the grease passage to the crankshaft side bearing and the grease passage to the crankpin side bearing to communicate with each other. Item 3. The scroll fluid machine according to Item 1 or 2. The grease reservoir is formed in the crankshaft or the crankpin, and the grease reservoir is communicated with a passage in the fuel supply body through a radial conduction hole provided in the crankshaft or the crankpin. The scroll fluid machine according to any one of the above. The scroll fluid machine according to any one of claims 1 to 4, wherein a grease inlet is provided on an outer periphery of the housing outside the fuel filler. The scroll fluid machine according to any one of claims 1 to 4, wherein a grease inlet is provided at an outer end of the crankshaft. The scroll fluid machine according to any one of claims 1 to 6, wherein the oil filler is formed of a disk-shaped plate material. An outer ring in which a lubrication body is fitted in a bearing hole bored in a fixed body or orbiting scroll, and an inner ring that is fitted in a crankshaft or a crank pin fitted in the bearing hole via a bearing; And an oil supply port for the bearing is formed by a space formed between the outer ring and the inner ring, and a passage is formed in at least one of the outer ring and the inner ring to communicate the space with the grease injection port. The scroll fluid machine according to any one of claims 1 to 6.

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