JP2000227081A - Scroll type fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently cool an oil liquid by returning the oil liquid returned to an oil tank through a long cooling distance. SOLUTION: A cooling air flow from a cooing fan 26 is supplied to the lower side of an oil tank 2, a partition plate 27 is provided in the oil tank 2, and hence a horizontal U-shaped turn around passage 31 is formed in the oil tank 2. Hereby, because the cooling distance when a lubricating oil 3 flows in the oil tank 2 is lengthened, the lubricating oil 3 flowing in the turn around passage 31 can be sufficiently cooled by the cooling air flow from the cooling fan 26, and the coolest lubricating oil 3 can be in order supplied to between the slidably contact face 4B of a thrust receiver 4 and the slidably contact face 10D of a revolving scroll 10, and the sliding part positions of a revolving bearing 11 and the like.

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 machine suitable for use in, for example, an air compressor and a vacuum pump.

[0002]

2. Description of the Related Art Generally, a scroll type fluid machine has a lower portion serving as an oil tank for storing oil for cooling and lubrication, a casing provided with a thrust receiver on the front side, and a spiral plate formed on a head plate provided on the front side of the casing. A fixed scroll on which a wrap portion is erected, a drive shaft rotatably provided on the casing, and a front end of the drive shaft rotatably provided in the casing via a swivel bearing in the casing. A wrap portion overlapping the wrap portion of the fixed scroll is provided upright, and the back surface of the end plate is slidably in contact with the thrust receiver, and the oil liquid accumulated in the oil tank of the casing is sucked from a suction port and swirled. There is known an oil liquid supply means for supplying to a sliding portion such as a bearing (for example, Japanese Patent Application Laid-Open Nos. Hei 5-44402 and Hei 5-44402).
44668, etc.).

A conventional scroll type fluid machine of this type is provided on the outer peripheral side of a fixed scroll by rotating a driving shaft from the outside and orbiting the orbiting scroll with a fixed eccentricity relative to the fixed scroll. While sucking a fluid such as air from the suction port, the fluid is sequentially compressed in each of the compression chambers defined between the wrap portion of the fixed scroll and the wrap portion of the orbiting scroll. The liquid is discharged from the discharge port provided at the outside.

During operation of the scroll type fluid machine, the oil liquid supply means sucks the oil liquid accumulated in the oil tank of the casing from a suction port, and supplies the oil liquid to sliding parts such as a swivel bearing. Cool and lubricate the area. Further, the oil liquid that has cooled and lubricated each part flows down and returns into the oil tank.

[0005]

According to the scroll type fluid machine of the prior art described above, the oil liquid supply means sucks the oil liquid located near the suction port out of the oil liquid returned to the oil tank. Therefore, the high-temperature oil liquid after cooling each sliding portion is sucked from the suction port, and the high-temperature oil liquid circulates. For this reason, a high-temperature oil liquid is supplied to a sliding portion such as a slewing bearing, so that there is a problem that the cooling and lubrication efficiency of these members is reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to allow the oil liquid returned to the oil tank to flow to the suction port with a long cooling distance so that the oil liquid can be sufficiently supplied. An object of the present invention is to provide a scroll-type fluid machine that can be cooled.

[0007]

In order to solve the above-mentioned problems, a scroll-type fluid machine according to the first aspect of the present invention has a lower portion serving as an oil tank for storing cooling and lubricating oil, and a thrust receiver provided on the front side. And a fixed scroll provided on the front side of the casing and having a spiral wrap portion standing upright on the end plate, a drive shaft rotatably provided on the casing, and a drive shaft provided in the casing. A revolving scroll that is rotatably provided on the distal end side via a revolving bearing, a wrap portion overlapping the wrap portion of the fixed scroll is provided upright on the front surface of the end plate, and the back surface of the end plate slides against the thrust receiver; and the casing. Oil liquid supply means for sucking the oil liquid accumulated in the oil tank from the suction port and supplying the oil liquid to the orbiting bearing between the thrust receiver and the orbiting scroll; A cooling fan for cooling the oil tank of the shing, and a partition plate provided in the oil tank of the casing and forming a passage for turning the oil liquid returned to the oil tank at least once at a position away from the suction port. It becomes.

[0008] With this configuration, between the thrust receiver and the orbiting scroll, the high-temperature oil liquid that has cooled and lubricated the orbiting bearing and returned to the oil tank passes through the oil tank along the partition plate along the suction port. Flow away from the housing, and return at this position to flow toward the suction port, so that the cooling distance of the oil liquid exposed to the cooling air flowing near the oil tank of the casing can be extended, and during this time, the oil liquid can be sufficiently Can be cooled.

A second aspect of the present invention is to provide a configuration in which a meandering plate for forming a meandering passage between the casing and the partition plate is provided in the oil tank of the casing.

[0010] With this configuration, the oil liquid returned to the oil tank flows through the meandering passage formed by the meandering plate between the oil tank and the partition plate, so that the oil liquid is exposed to the cooling air flowing near the oil tank of the casing. The cooling distance can be greatly lengthened, and the cooling liquid can cool the oil liquid.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a scroll type air compressor will be described in detail as an example of a scroll type fluid machine according to an embodiment of the present invention with reference to the accompanying drawings.

FIGS. 1 to 3 show a first embodiment of the present invention. Reference numeral 1 denotes a bottomed cylindrical casing forming an outer frame of a scroll type air compressor.
It is arranged horizontally so that the axis is horizontal.
Here, the casing 1 includes an annular bottom 1A and the bottom 1A.
A large-diameter cylindrical portion 1B extending forward from the outer peripheral side of A toward a fixed scroll 5 described later, and a small-diameter cylindrical tube extending rearward from the inner peripheral side of the bottom 1A to the opposite side to the large-diameter cylindrical portion 1B. And a bearing cylinder portion 1C.

Reference numeral 2 denotes an oil tank provided in the casing 1 at a position below the bottom 1A of the casing 1.
Is an upper plate 2A extending rearward from the bottom 1A of the casing 1, and a rear plate 2 extending downward from the tip of the upper plate 2A.
B, a bottom plate 2C extending forward from the lower end of the rear plate 2B, and left and right side plates 2D, 2D (shown in FIG. 2) to form a substantially rectangular parallelepiped container. The lubricating oil 3 is stored as a liquid. In addition, a vertical plate 2E is integrally provided on the front side of the bottom plate 2C so as to extend upward.
At the upper end of E, a horizontal plate 2F forming a part of the large-diameter cylindrical portion 1B of the casing 1 extends toward the front side. Further, an oil tank 2 is provided on the vertical plate 2E by a lubricating oil supply mechanism 16 described later.
A suction port 2G for sucking the lubricating oil 3 therein is provided, and a strainer housing cylinder 2H is formed so as to surround the suction port 2G. Further, in the oil tank 2, a partition plate 27 described later is provided.
And so on.

Reference numeral 4 denotes an annular thrust receiver provided on the front side of the large-diameter cylindrical portion 1B of the casing 1. On the inner peripheral side of the thrust receiver 4, an annular recess 4A is formed toward the front side. Inside, an end plate 10A of the orbiting scroll 10 described later is provided. A sliding contact surface 10 of the orbiting scroll 10 is provided in the annular recess 4 </ b> A of the thrust receiver 4.
An annular sliding contact surface 4B with which the sliding contact D contacts is formed.
B receives a thrust load acting on the orbiting scroll 10.

Reference numeral 5 denotes a fixed scroll provided on the front side of the thrust receiver 4 of the casing 1.
A mirror plate 5A, which is formed in a substantially disk shape and whose center coincides with an axis of a drive shaft 6 to be described later, a spiral wrap portion 5B erected on the mirror plate 5A, and an outer periphery of the mirror plate 5A A cylindrical portion 5C protruding in the axial direction so as to surround the wrap portion 5B from the side, and a flange portion 5D protruding radially outward from the outer peripheral side of the cylindrical portion 5C and abutting against the thrust receiver 4 and attached thereto. It is configured.

Reference numeral 6 denotes a drive shaft rotatably supported by bearings 7 and 8 in the casing 1. A pulley 25 described later is attached to a base end of the drive shaft 6, and a crank 6 is provided at a tip end thereof.
A extends into the casing 1. The axis of the crank 6A of the drive shaft 6 is eccentric with respect to the axis of the drive shaft 6 by a predetermined dimension.

Reference numeral 9 denotes a balance weight provided between the bearing cylinder portion 1C of the casing 1 and a boss portion 10C of the orbiting scroll 10, which will be described later, and provided on the outer peripheral side of the drive shaft 6. It protrudes radially outward from the shaft 6 to balance the rotation of the drive shaft 6 with respect to the orbiting scroll 10.

Reference numeral 10 denotes an orbiting scroll provided in the casing 1 so as to be capable of orbiting in opposition to the fixed scroll 5. The orbiting scroll 10 is a disk-shaped end plate 10A.
And a spiral wrap portion 10B which is provided in the axial direction on the front surface of the end plate 10A. The orbiting scroll 10 has a boss 10C protruding from the center of the rear surface of the end plate 10A.
It is rotatably attached to the crank 6A of the drive shaft 6 by the swivel bearing 11 housed in the boss 10C. The front surface of the end plate 10A is in sliding contact with the flange portion 5D of the fixed scroll 5, and the rear surface (back surface) is a sliding contact surface 10D in sliding contact with the thrust receiver 4.

Here, the orbiting scroll 10 is disposed so as to overlap with the wrap portion 5B of the fixed scroll 5 by being shifted by, for example, 180 degrees.
A plurality of compression chambers 12, 12,... Are defined between 10B. An Oldham coupling (not shown) constituting a rotation preventing mechanism is provided between the orbiting scroll 10 and the thrust receiver 4.
This is to prevent zero rotation.

During operation of the scroll type air compressor, air is sucked into a compression chamber 12 on the outer peripheral side from a suction port (not shown) provided on the outer peripheral side of the fixed scroll 5.
This air is sequentially compressed in each compression chamber 12 while the orbiting scroll 10 makes a revolving motion, and finally compressed air is supplied from the center compression chamber 12 to the outside through a discharge port 13 provided at the center of the fixed scroll 5. Discharge.

Reference numeral 14 denotes a strainer housing section defined including the strainer housing cylinder 2H of the oil tank 2, and 15 denotes a strainer housed in the strainer housing section 14. The strainer 15 is provided with a suction port 2G from inside the oil tank 2. This removes foreign matter mixed in the lubricating oil 3 sucked through the lubricating oil 3, and supplies clean lubricating oil 3 to the oil supply pump 19 described later.

Reference numeral 16 denotes a lubricating oil supply mechanism serving as oil liquid supply means.
It is roughly constituted by the discharge passage 18, the oil supply pump 19, and the like.

Reference numeral 17 denotes a suction passage formed in the radial direction of the thrust receiver 4. One end of the suction passage 17 is open to the inner peripheral surface of the strainer housing 14, and the other end is an oil supply pump 19.
Is connected to the suction chamber A.

Reference numeral 18 denotes the end plate 1 of the orbiting scroll 10.
0A in the radial direction, the discharge passage 18
Has one end communicating with the discharge chamber B via an oil reservoir 19G of the oil supply pump 19, and the other end having a sliding contact surface 4B of the thrust receiver 4.
The sliding contact surface 10D is in contact with the sliding surface 10D. The intermediate position of the discharge passage 18 is located at the boss 10 of the orbiting scroll 10.
It is open in C. The discharge passage 18 transfers the lubricating oil 3 discharged from the oil supply pump 19 between the sliding contact surface 4B of the thrust receiver 4 and the sliding contact surface 10D of the orbiting scroll 10 and the turning bearing 11 in the boss portion 10C. And so on.

Reference numeral 19 denotes the thrust receiver 4 and the orbiting scroll 1
0, the lubrication pump 19 includes, as shown in FIG. 3, a swivel housing recess 19 </ b> A recessed on the sliding contact surface 4 </ b> B side of the thrust receiver 4, for example. A recessed portion 19B which is spaced apart from the swivel accommodating recessed portion 19A and is provided on the sliding contact surface 4B side of the thrust receiver 4;
A guide groove 19C provided on the side of the sliding contact surface 4B, which is located between B and the swirler housing recess 19A, and protrudes from the sliding contact surface 10D of the orbiting scroll 10 toward the swirler housing recess 19A. A revolving element 19D, a driving projection 19E protruding from the sliding contact surface 10D of the orbiting scroll 10 into the recess 19B, and a slide plate 19F slidably provided in the guide groove 19C. It is roughly configured. In addition, both ends of the slide plate 19F have the swivel 1
9D and the drive projection 19E are slidably contacted with each other.
A and the suction chamber A communicating the suction passage 17 with the suction passage 17 and the discharge passage 18
And a discharge chamber B communicating with the discharge chamber B.

The refueling pump 19 is connected to the swirler 1
9D, the drive projection 19E moves following the orbiting scroll 10, and the slide plate 19F moves along with the guide groove 19C.
The suction chamber A and the discharge chamber B are guided along
Are respectively enlarged and reduced, and the suction chamber A
The lubricating oil 3 sucked into the inside is discharged from the discharge chamber B to the discharge passage 18 through the oil reservoir 19G and supplied to the sliding contact surfaces 4B and 10D, the swivel bearing 11, and the like.

Reference numeral 20 denotes a discharge passage formed in the drive shaft 6.
The discharge passage 20 has one end opening to the boss 10C and the other end opening to the peripheral surface of the drive shaft 6. The discharge passage 20 returns the lubricating oil 3 in the boss 10 </ b> C into the oil tank 2.

Reference numeral 21 denotes a first duct which is located at the tip end side of the bearing cylinder portion 1C of the casing 1 and is attached to the casing 1. The first duct 21 extends downward from the periphery of the drive shaft 6. Have been.

Reference numeral 22 denotes a second duct provided integrally or separately on the lower side of the casing 1.
Extends in the front and rear directions of the casing 1 and has a first duct 2
1 is connected to the lower end side (downstream side). The second duct 22 allows the cooling air to pass through so as to contact the bottom plate 2C of the oil tank 2, and the lubricating oil 3 in the oil tank 2 is cooled by the cooling air flowing through the second duct 22 so as to contact the bottom plate 2C of the oil tank 2. Is cooled through.

Reference numeral 23 denotes a third duct connected to the downstream side of the second duct 22, reference numeral 24 denotes a fourth duct connected to the third duct 23, and the fourth duct 24 is a fixed scroll. The cooling air is supplied to the fixed scroll 5 and extends upward along the fixed scroll 5.

Reference numeral 25 denotes a pulley mounted on the base end side of the drive shaft 6. The pulley 25 is connected to a drive motor (neither is shown) or the like via a V-belt.

Reference numeral 26 denotes a cooling fan located in the first duct 21 and attached to the pulley 25.
Is formed as a sirocco fan, and rotates with the pulley 25 to cool the fixed scroll 5 via the lower side of the oil tank 2 in the ducts 21, 22, 23, 24 as shown by the white arrows. It supplies wind.

Reference numeral 27 denotes a partition plate provided in the oil tank 2 of the casing 1 according to the present embodiment. The partition plate 27 abuts on the horizontal plate 2F such that the base end side thereof follows the horizontal plate 2F of the oil tank 2. , The front end side extends to a position leaving an interval between the lubricating oil 3 and the rear plate 2B. Further, both sides in the width direction of the partition plate 27 are in contact with the left and right side plates 2D, 2D. As a result, the partition plate 27 is formed into an upper passage 28 in the oil tank 2 above the partition plate 27 to flow the lubricating oil 3 in a direction away from the suction port 2G, and a folded portion 29 between the partition plate 27 and the rear plate 2B.
And a lower U-shaped passage 30 through which the lubricating oil 3 flows from the folded portion 29 toward the suction port 2G between the partition plate 27 and the bottom plate 2C.

Reference numerals 32, 32, and 32 denote three straightening plates which extend vertically through the partition plate 27 along the flow direction of the lubricating oil 3, and each straightening plate 32 has a suction port. The lubricating oil 3 is neatly distributed toward 2G.

The scroll-type air compressor according to the present embodiment has the above-described configuration. Next, the operation of the scroll-type air compressor will be described.

First, when the drive shaft 6 is rotated by the drive motor, the orbiting scroll 10 makes a orbital motion with a certain eccentric dimension about the drive shaft 6, and the wrap portion 5 B of the fixed scroll 5 and the wrap of the orbiting scroll 10 are wrapped. Part 10
., B are continuously reduced. Thus, the outside air sucked from the suction port of the fixed scroll 5 is discharged from the discharge port 13 to an external air tank (not shown) or the like while being sequentially compressed in each compression chamber 12.

During operation of the scroll type air compressor, the oil supply pump 19 is operated to suck the lubricating oil 3 in the oil tank 2 into the suction passage 17 via the suction port 2G and the strainer 15, and to receive the thrust from the discharge passage 18 Between the sliding contact surface 4B of the rotary scroll 4 and the sliding contact surface 10D of the orbiting scroll 10;
And so on. Then, the space between the sliding surfaces 4B and 10D is cooled,
The lubricating oil 3 flows out of the gap between the sliding surfaces 4B and 10D, and is returned into the oil tank 2. The lubricating oil 3 that has cooled and lubricated the slewing bearing 11 is returned from the discharge passage 20 into the oil tank 2.

The sliding surfaces 4B and 10D, the slewing bearing 1
The lubricating oil 3 that has cooled and lubricated 1 etc. and returned into the oil tank 2
It flows in a direction away from the suction port 2G through the upper passage 28 of the return passage 31 formed by the partition plate 27, flows into the lower passage 30 at the return portion 29, and passes through the lower passage 30 to the suction opening 2G. Flow toward Thereby, the lubricating oil 3
Since the cooling distance flowing toward the suction port 2G in the oil tank 2 is increased without being sucked into the suction port 2G at the shortest distance, the lubricating oil 3 can be efficiently cooled over time.

In particular, when the cooling distance of the lubricating oil 3 is increased in the lower passage 30 facing the bottom plate 2C of the oil tank 2, the lubricating oil 3 in the lower passage 30 is discharged from the cooling fan 26 to the duct 21,
Since it is exposed to the cooling air supplied to the lower side of the oil tank 2 through a long distance, the heat of the lubricating oil 3 can be effectively released into the cooling air.

Thus, according to the present embodiment, the cooling air from the cooling fan 26 is supplied to the lower side of the oil tank 2 and the partition plate 27 is provided in the oil tank 2 so that the horizontal U Since the cooling path when the lubricating oil 3 flows can be lengthened by forming the folded path 31 in the shape of a letter, it is possible to prevent the lubricating oil from being sucked into the suction port while being hot as described in the related art. Thus, the lubricating oil 3 flowing through the return passage 31 can be efficiently cooled by the cooling air, and can be supplied to each lubricating portion in order from the coldest lubricating oil 3. Thereby, between the sliding contact surface 4B of the thrust receiver 4 and the sliding contact surface 10D of the orbiting scroll 10, the orbiting bearing 11 and the like can be effectively cooled and lubricated by the cooled lubricating oil 3,
The life of these members and the lubricating oil 3 can be extended.

Further, the cooling distance of the lubricating oil 3 in the lower passage 30 exposed to the cooling air from the cooling fan 26 can be increased, and the lubricating oil 3 can flow over time.
The lubricating oil 3 can be effectively cooled by the cooling air from the cooling fan 26, and the cooling efficiency can be increased.

Further, the scroll type air compressor is arranged horizontally with its axis being horizontal, and the first duct 2
The air sucked in from 1 passes through the lower side of the oil tank 2 in the second duct 22, passes through the front surface of the fixed scroll 5 in the fourth duct 24, and is discharged to the outside from the upper opening. Thus, even when the operation of the compressor is stopped, that is, even after the cooling fan 26 is stopped, the temperature of the fixed scroll 5 rises due to the heat of the fixed scroll 5, and the warmed air flows upward through the fourth duct 24 and is discharged. Is done. Therefore, the fourth duct 2
4, each duct 21, 22, 2,
Since the cooling air flows through the insides 3 and 24, the cooling air can be supplied to the oil tank 2, and the cooling of the lubricating oil 3 can be promoted even after the operation of the compressor is stopped.

FIGS. 4 and 5 show a second embodiment of the present invention. The feature of this embodiment is that a passage meandering between the casing and the partition plate is provided in the oil tank of the casing. That is, a meandering plate to be formed is provided. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 41 denotes a partition plate provided in the oil tank 2 according to the present embodiment. The partition plate 41 is provided in the oil tank 2 in substantially the same manner as the partition plate 27 according to the first embodiment.
An upper passage 42 for flowing the lubricating oil in a direction away from the suction port 2G on the upper surface side of the partition plate 41, a folded portion 43 between the partition plate 41 and the rear plate 2B, and a folded portion 43 between the partition plate 41 and the bottom plate 2C.
And a lower passage 44 through which the lubricating oil flows toward the suction port 2G from the air passage 2G.

Reference numerals 46, 46, and 46 denote three components according to the present embodiment.
The straightening plates 46 are erected on the upper surface side of the partition plate 41 along the flow direction of the lubricating oil.

Reference numerals 47, 47, 47 denote three meandering plates provided in the lower passage 44 according to the present embodiment.
7 each have a rectangular shape, and as shown in FIG. 5, an intermediate meandering plate 47 has a side plate 2D on the opposite side to the suction port 2G.
And the other two meandering plates 47 are disposed between the side plate 2D on the side of the suction port 2G and the other two meandering plates 47, 47.
The side plate 2 </ b> D is in contact with the side plate 2 </ b> D, and is disposed with a space between the side plate 2 </ b> D on the opposite side. Thereby, each meandering plate 47
Is a meandering passage in which the lower passage 44 meanders left and right toward the suction port 2G.

Further, since the lower passage 44 forms a meandering passage by each meandering plate 47, the cooling distance when lubricating oil flows through the lower passage 44 exposed to the cooling air flowing through the second duct is greatly increased. Therefore, the lubricating oil flowing through the lower passage 44 can be effectively cooled with the cooling air from the cooling fan 26 over time.

Thus, in the present embodiment configured as described above, substantially the same operation and effect as those of the first embodiment can be obtained. In particular, in the present embodiment, the heat of the lubricating oil is reduced. Since the lower passages 44 that can efficiently discharge the oil into the cooling air are formed as meandering passages by the meandering plates 47, and the lubricating oil cooling distance is further lengthened, the lubricating oil cooling efficiency can be further improved. it can.

In the first embodiment, the oil tank 2 is provided with three rectifying plates 32 together with the partition plate 27, but the present invention is not limited to this. 3
2, two or four or more rectifying plates 3
2 may be abolished. Further, the second embodiment may be similarly configured.

Further, in each embodiment, the case where one partition plate 27, 41 is provided in the oil tank 2 has been described as an example. However, instead of this, for example, a plurality of partition plates It is good also as a structure which is arrange | positioned so that it may alternately overlap in the downward direction, and turns over the turn-back path | route twice or more by each partition plate.

Further, in each embodiment, the thrust receiver 4 is provided separately from the casing 1, but the present invention is not limited to this, and the casing and the thrust receiver may be formed integrally. .

Further, in each of the embodiments, a scroll air compressor has been described as an example of a scroll type fluid machine. However, the present invention is not limited to this and can be widely applied to, for example, a vacuum pump, a refrigerant compressor, and the like. .

[0053]

As described above in detail, according to the first aspect of the present invention, the cooling air from the cooling fan is supplied to cool the oil tank of the casing, and the oil tank of the casing is provided in the oil tank of the casing. Is provided with a partition plate that forms a passage that returns the oil liquid returned to the suction port at least once at a position away from the suction port. Therefore, between the thrust receiver and the orbiting scroll,
The high-temperature oil liquid that has cooled and lubricated the slewing bearing and returned to the oil tank can flow in the oil tank along the partition plate in a direction away from the suction port, and can be turned back at this position and flow toward the suction port. Thus, the cooling distance of the oil liquid exposed to the cooling air flowing near the oil tank of the casing can be lengthened. Thereby, the oil liquid sucked into the suction port in the oil tank can be sufficiently cooled, so that the cooled oil liquid can be supplied to the orbiting bearing between the thrust receiver and the orbiting scroll, and the life of these members is extended. Can be stretched.

According to the second aspect of the present invention, since the meandering plate which forms a meandering path between the casing and the partition plate is provided in the oil tank of the casing, the oil liquid returned to the oil tank is used for By flowing in the meandering passage formed by the meandering plate between the partition plate and the partition plate, the cooling distance of the oil liquid exposed to the cooling wind flowing in the vicinity of the oil tank of the casing can be significantly lengthened, and this cooling wind causes the oil to flow. The liquid can be cooled more effectively.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a scroll type air compressor according to a first embodiment of the present invention.

FIG. 2 is a partially broken perspective view showing a partition plate and a current plate together with an oil tank.

FIG. 3 is an enlarged view of a refueling pump, indicated by an arrow III- in FIG.
It is the expanded sectional view seen from the III direction.

FIG. 4 is a partially broken perspective view showing a partition plate, a flow regulating plate, and a meandering plate according to a second embodiment of the present invention together with an oil tank, viewed from the same position as in FIG. 2;

FIG. 5 is an arrow VV in FIG. 4 showing the arrangement of each meandering plate.
It is sectional drawing seen from the direction.

[Explanation of symbols]

 Reference Signs List 1 casing 2 oil tank 2G suction port 3 lubricating oil (oil liquid) 4 thrust receiver 5 fixed scroll 5A, 10A end plate 5B, 10B lap 6 drive shaft 10 orbiting scroll 11 orbiting bearing 12 compression chamber 16 lubricating oil supply mechanism (oil / liquid supply) Means) 26 cooling fan 27, 41 partition plate 31, 45 folded path 47 meandering plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuo Kido 1116 Koizono, Ayase-shi, Kanagawa Tokiko Co., Ltd. Sagami Plant (72) Inventor Hiroyuki Mihara 1-6-3 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Tokiko Corporation (72) Inventor Kazutaka Sueto 1-6-3 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Tokiko Co., Ltd.F-term (reference) BB11 BB13 CC02 CC11 CC22 CC27 CC44 CC49

Claims (2)

[Claims] 1. A lower part is an oil tank for storing an oil liquid for cooling and lubrication, and a casing provided with a thrust receiver on a front side thereof, and a spiral wrap part provided on a front side of the casing and a spiral wrap portion provided on a head plate. A fixed scroll, a drive shaft rotatably provided on the casing, and a turnable shaft provided on a tip side of the drive shaft in the casing via a turning bearing, and a wrap portion of the fixed scroll on a front surface of the end plate. An orbiting scroll in which an overlapped lap portion is erected and the back surface of the end plate slides against the thrust receiver; and an oil liquid collected in an oil tank of the casing is sucked from a suction port, and the oil liquid is supplied to the thrust receiver and the orbiting scroll. And a cooling fan for cooling the oil tank of the casing; and a cooling fan provided in the oil tank of the casing and returned to the oil tank. A scroll-type fluid machine comprising a partition plate forming a passage for turning off the oil liquid at least once at a position separated from the suction port. 2. The scroll-type fluid machine according to claim 1, wherein a meandering plate that forms a meandering passage between the partition and the partition plate is provided in the oil tank of the casing.