JPH08177765A - Fluid compressor - Google Patents

Abstract

PURPOSE: To provide a fluid compressor by which a necessary oil quantity can be secured by preventing disturbance of lubricating oil of an oil storage part, enhancing oil feeding efficiency by reliably sucking up oil, securing lubricating ability in slidingly movable parts, and restraining a delivery quantity of the lubricating oil to an external part. CONSTITUTION: A fluid compressor is provided with an oil storage part 20 which is arranged in a sealed case 1 and collects and stores lubricating oil, oil feeding mechanisms Sa and Sb to feed oil to respective slidingly movable parts by sucking up the lubricating oil in this oil storage part and fluid guiding members 26 and 27 where interposing parts 28 and 33 interposed between a deriving part of high pressure gas and an oil level of the lubricating oil of the oil storage part and partition parts 29 and 34 which partition the inside of the sealed case and have oil guiding notches 30 and 34 in positions in the lubricating oil and gas guiding holes 31 and 35 in parts above the oil storage part are continuously arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid compressor for compressing a refrigerant of a refrigeration cycle, for example.

[0002]

2. Description of the Related Art For example, a fluid compressor (hereinafter referred to as a compressor) has been proposed by the present applicant. this is,
The cylinder and piston are eccentrically arranged in the closed case,
A spiral groove having a gradually smaller pitch is formed in the piston. A spiral blade is also fitted in this groove.

The blade is divided into a plurality of spaces between the cylinder and the piston, and a plurality of compression chambers whose volume is gradually reduced are formed in the cylinder from one end side to the other end side.

The rotational force of the cylinder is transmitted to the piston through the rotational force transmission mechanism, and the cylinder and the piston rotate while maintaining the positional relationship. Further, as the blades rotate, the blades move in and out of the groove and project and retract in the radial direction of the piston.

A compressed gas, for example, a refrigerant gas in a refrigeration cycle is sucked into the cylinder and is transferred from the suction chamber located on the most suction side of the compression chambers to the discharge chamber located on the most discharge side. , And gradually compressed during transfer.

When it reaches the discharge chamber, it rises to a predetermined pressure and is once drawn into the closed case through a guide hole provided in the cylinder. The high-pressure gas filled in here is introduced into the refrigeration cycle from the discharge pipe connected to the closed case.

[0007]

By the way, in this type of compressor, a so-called horizontal type compressor is often used. That is, in the case of the vertical fluid compressor, the cylinder and the piston come into contact with the bearing on the lower side due to the influence of gravity, and friction is generated to impair smooth rotation. It is necessary to take measures such as interposing thrust bearings during this period.
The configuration becomes complicated. On the other hand, if it is a horizontal type, the structure can be simplified.

However, in the horizontal type, it is not possible to secure a large capacity for the oil reservoir of the lubricating oil formed on the inner bottom of the closed case. If the amount of lubricating oil enclosed is increased, a part of the rotor constituting the electric motor unit will be immersed in this lubricating oil.

The rotor splashes up the lubricating oil or disturbs the oil surface, making it impossible to smoothly supply oil to the sliding portion. Alternatively, the scattered oil particles may be discharged directly to the outside together with the high-pressure gas. If it is used for a long period of time, the absolute amount of lubricating oil in the oil reservoir will be insufficient, causing a seizure accident.

Even if the rotor is not immersed in the lubricating oil, if the high-pressure gas is directly sprayed on the lubricating oil surface of the oil reservoir, the oil surface will be disturbed. The swaying of the oil surface may cause the lubricating oil to wet the outlet guide hole, or the high-pressure gas may directly blow into the lubricating oil, impairing the smooth outlet action of the gas.

Also in this type of compressor, the operating frequency may be adjusted to adapt to the load, and the cylinder may be driven to rotate at high speed. At this time, the fluctuation of the oil level is further increased and the oil supply efficiency is reduced. There is a fear of.

As described above, ensuring the oil supply efficiency occupies an extremely important factor, but the conventional horizontal fluid compressor has not yet achieved a complete structure. The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent disturbance of lubricating oil in an oil sump, to reliably suck up oil to improve lubrication efficiency, and to prevent sliding. An object of the present invention is to provide a fluid compressor that secures a necessary amount of oil by suppressing the amount of lubricating oil discharged to the outside while ensuring the lubricity of the portion.

[0013]

In order to achieve the above object, a fluid compressor according to a first aspect of the present invention is, in claim 1, characterized in that a sealed case to which a suction pipe and a discharge pipe are connected, and a case housed in this sealed case. A rotationally driven cylinder, a rotating body eccentrically arranged in the cylinder, having a spiral groove formed on the peripheral surface at a gradually decreasing pitch, and fitted into the groove of the rotating body so that the cylinder can rotate freely. , A spiral blade that partitions to form a plurality of compression chambers with gradually decreasing volume in the cylinder, and the rotation of the cylinder is transmitted to the rotating body, and the compressed body is sucked into the compression chamber on the suction side. A fluid compressor provided with a rotational force transmission mechanism for gradually compressing fluid while transferring it to a compression chamber on the outlet side, provided in the above-mentioned hermetically sealed case, and for each sliding portion such as a cylinder and a rotating body or a blade. Lubricating oil supplied The high-pressure fluid, which is provided between the oil sump portion that collects and the lubricating oil surface of the oil sump portion and the above-mentioned derivation portion of the high-pressure fluid, is applied to the lubricating oil surface of the oil sump portion. An intervening part that guides into the sealed case by stopping it so that it does not spray, and an integrally formed continuous part of this intervening part that partitions the oil sump part and the inside of the sealed case, and an oil guide hole and a lubrication hole at the position in the lubricating oil. A fluid guide member including a partition portion having a gas guide hole is provided above the oil.

According to a second aspect of the present invention, the interposing portion of the fluid guide member according to the first aspect is a cylindrical body provided in parallel with the outer peripheral surface of the cylinder end portion with a gap.
In claim 3, the partition portion of the fluid guide member according to claim 2 is interposed between the high pressure fluid outlet opening end of the interposition portion formed of a cylindrical body and the discharge pipe connection portion of the sealed case. Characterize.

According to a fourth aspect of the present invention, the rotary drive source for the cylinder according to the second aspect is provided in a hermetically sealed case, which is provided with a rotor externally fitted to the cylinder and a narrow gap with the outer peripheral surface of the rotor. The intervening portion made of the cylindrical body is extended such that the high-pressure fluid outlet opening end is interposed between the electric motor portion and the partition portion.

According to a fifth aspect of the present invention, the rotary drive source for the cylinder according to the second aspect is provided with a rotor externally fitted to the cylinder and an outer peripheral surface of the rotor with a narrow gap, and is housed in a closed case. The interposing portion formed of the cylindrical body is extended so that the high-pressure fluid outlet opening end is interposed between the stator coil end of the electric motor portion and the cylinder outer peripheral surface. Characterize.

According to a sixth aspect of the present invention, in the intervening portion composed of the cylindrical body according to the second aspect, the diameter of the lower half portion is smaller than the diameter of the upper half portion. According to a seventh aspect of the present invention, the intervening portion formed of the cylindrical body according to the second aspect is characterized in that the protruding length of the lower half portion is longer than the protruding length of the upper half portion.

In order to achieve the above object, a fluid compressor according to a second aspect of the present invention is, in claim 8, a hermetic case in which a suction pipe is connected to one end and a discharge pipe is connected to both ends. A cylinder that is housed in this sealed case and is driven to rotate, and a pair of spiral-shaped cylinders that are eccentrically arranged in this cylinder and that are formed at a pitch that gradually decreases on the peripheral surface from the axial middle portion to both ends. A rotary body having a groove, a spiral blade that is fitted in and out of each groove of the rotary body, and partitions to form a plurality of compression chambers having gradually smaller volumes, and a piston shaft. And a suction guide passage that is provided along the direction and that guides the fluid to be compressed guided from the suction pipe to the compression chamber in the middle portion, and transmits the rotational driving force of the cylinder to the rotating body, and from the suction pipe through the suction guide passage. It was sucked into the compression chamber in the middle part A fluid compressor provided with a rotational force transmission mechanism for gradually compressing a compressed fluid while transferring the compressed fluid to the compression chambers at both ends. The high pressure fluid, which is interposed between the oil sump portion for collecting the lubricating oil to be supplied and the lubricating oil surface of this oil sump portion, and the high pressure fluid discharge portion, is the high pressure fluid discharged from the discharge portion. Lubricating oil: An intervening part that prevents the oil from spraying on the oil surface and guides it into the sealed case, and an integrated part that is connected to this intervening part to partition the oil sump and the inside of the sealed case and guide the oil to a position in the lubricating oil. And a pair of fluid guide members each including a partition part having a gas guide hole above the lubricating oil.

[0019]

The interposition portion of the fluid guide member is interposed between the above-mentioned leading portion of the high pressure fluid and the lubricating oil surface of the oil sump portion to prevent the disturbance of the oil surface of the oil sump portion due to the discharged high pressure fluid. Block.
Then, the partition part is immersed in the lubricating oil to prevent the oil surface from being disturbed.

Since the lubricating oil is conducted through the oil guiding hole, there is no problem in refueling. Further, the partition part partitions the inside of the closed case to separate the oil component of the lubricating oil mixed with the high-pressure fluid and prevent the oil from being discharged to the outside. Since the high-pressure fluid is conducted to the gas guide hole provided in the partition section, it does not hinder the discharge to the outside.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the hermetically sealed case 1 includes a case main body 1a having both ends opened with the axial direction oriented horizontally, and an upper lid 1b closing one end opening of the case main body 1a.
It is composed of a lid plate 1c that closes the opening at the other end. The compression mechanism portion 3 and the electric motor portion 4 are housed in the closed case 1.

The compression mechanism section 3 has a cylinder 5 consisting of a hollow cylinder whose both ends are open, and a rotor 6 held by a cover body 6a is fitted on the outer peripheral surface of this cylinder. A stator 7 is fitted on the inner peripheral surface of the case body 1a of the hermetically sealed case 1, and together with the rotor 6, the motor section 4 is provided.
Is configured. The electric motor section 4 is a rotary drive source for rotationally driving the cylinder 5.

A piston 8 as a rotating body is eccentrically arranged in the cylinder 5. That is, a part of the peripheral wall of the piston 8 along the axial direction is accommodated so as to be in rolling contact with a part of the inner peripheral wall of the cylinder 5 along the axial direction.

A pair of left and right spiral grooves (not shown) are formed on the peripheral surface of the piston 8 so that the pitch is gradually reduced from the intermediate portion in the axial direction to the both end sides, and each groove has a spiral shape. Blades 10 and 10 are fitted so that they can come in and go out freely.

Therefore, the space between the cylinder 5 and the piston 8 is divided into a plurality of chambers by the blades 10 and 10 on both the left and right sides of the intermediate portion. In the cylinder 5, a plurality of compression chambers 11 ..., 11 ... whose volume is gradually reduced from the middle part to both end sides of the cylinder, that is, from the suction side to the discharge side are formed.

Shafts 8a, 8 are provided at both ends of the piston 8.
b is formed, and these shafts are fixed to the inner wall of the hermetically sealed case 2 and the main bearing 12 of the auxiliary bearing 13 and the main bearing 12 is formed.
It is inserted into 2a and 13a and is pivotally supported rotatably.

The pivot support holes 12a and 13a are provided eccentrically in the main and auxiliary bearings 12 and 13, and the piston 8 inserted therein is pivotally supported in an eccentric position.

The main bearing 12 is screwed and fixed to a cover plate 1c constituting the closed case 1, and a suction pipe 14 is connected to a part of the cover plate which communicates with a pivot hole 12a. The gas suction guide passage 15 that communicates with the suction pipe 14 through the pivot hole 12a is formed by the shaft portion 8a of the piston 8.
It is provided so as to penetrate from the end face along the axial direction.

The opening end of the gas suction guide passage 15 on the side of the auxiliary bearing 13 is closed by a closing cover 24 provided on the bearing. In the middle of the guide passage 15,
The vertical holes 15a are provided in a direction orthogonal to each other and open on the circumferential surface of the piston 8. The opening position corresponds to the space between the pair of left and right blades 10, 10.

Cylinder bearings 16a and 16b made of metal are press-fitted to the inner peripheral surfaces of both ends of the cylinder 5, respectively.
13 is interposed.

Each of the cylinder bearings 16a and 16b is formed in a thick ring shape, one side surface of which is spaced from the end surface of the piston 8 and the other side surface is flush with the end surface of the cylinder 5. Therefore, there is a gap with the flange surfaces of the bearings 12 and 13.

As shown in the enlarged view of FIG. 2, the main bearing 1
The second side cylinder bearing 16a is provided with a plurality of lead-out guide holes 17 ... Which are provided along the axial direction and open on both side surfaces of the bearing. These lead-out guide holes 17 ...
There are at least one pair at positions that are symmetrical in the radial direction of the cylinder bearing 16a.

Again, as shown in FIG. 1, the cylinder bearing 16b on the side of the auxiliary bearing 13 is not bored at all. Instead, the guide hole 18 is provided in the cylinder 5 and the cover body 6a which do not interfere with the end surface of the cylinder bearing 16b.
... is provided through.

Upper lid 1b and lid plate 1 constituting the closed case 1
Outlet pipes 19a and 19b are connected to c, respectively, and these pipes join outside and communicate with a refrigeration cycle device (not shown).

On the other hand, an oil reservoir 20 for collecting lubricating oil is formed on the inner bottom of the closed case 1. Then, the oil suction passages 21a and 21b integrally provided in the main and auxiliary bearings 12 and 13 are soaked in the lubricating oil of the oil sump 20.

The upper ends of these oil suction passages 21a, 21b communicate with oil supply pumps 22a, 22b provided on the peripheral surfaces of the shafts 8a, 8b of the piston 8. Thus, the bearings 12 and 13 and the piston shaft portions 8a and 8b are
The oil suction passages 21a, 21b and the oil supply pump portion 22a,
Oil supply mechanisms Sa and Sb including 22b and the like are provided.

An Oldham mechanism 25 as a mechanism for transmitting the rotational force of the cylinder 5 to the piston 8 is provided between the cylinder bearing 16b on the side of the sub bearing 13 and the shaft portion 8b of the piston 8.

Fluid guide members 26 and 27 are attached so as to face both ends of the cylinder 5, respectively. As shown in the enlarged view of FIG. 2 again, one of the fluid guide members 26 is formed from a cylindrical body that fits on the outer peripheral surface of the main bearing 12 and covers the end outer peripheral surface of the cylinder 5 with a gap. Intervening part 2
8 and a partition portion 29 provided from the outer peripheral surface of the interposing portion to the inner peripheral surface of the closed case.

The interposition part 28 is a cylinder bearing 16a.
And is parallel to the guide hole 17 provided in the above, and faces the open end with a gap. One opening end is closed by the end surface of the main bearing 12, and the other opening end opens in a state of facing the electric motor unit 4.

Then, as shown in FIG. 7B, the diameter of the upper half portion of the interposition part 28 is large and the diameter of the lower half portion is small, and the gap between the peripheral surface of the cylinder 5 and the cylinder 5 is small. However, the upper and lower parts are formed differently.

The partition part 29 is interposed between the end of the closed case 1 and the electric motor part 4 and is located at a position where the end part is divided into left and right parts. The partition part 29 partitions the oil sump part 20 together with the inside of the closed case. An oil guide notch 30 is provided at a position where the oil sump 20 is immersed in the lubricating oil, and a plurality of gas guide holes 31 are provided at positions where the inside of the case is partitioned on the oil level.

As shown in FIG. 1 again, the other fluid guide member 27 is a partition portion 32 which is interposed and fixed between the end portion of the case body 1a and the end portion of the upper lid 1b constituting the closed case 1.
And an interposition part 33 provided integrally with the partition part.

The partition part 32 is interposed between the end of the closed case 1 and the electric motor part 4, and is located at a position where the end part is divided into left and right parts. The partition part 32 partitions the oil sump part 20 together with the inside of the closed case. An oil guide notch 34 is provided at a position where the oil sump 20 is immersed in the lubricating oil, and a plurality of gas guide holes 35 are provided at a position for partitioning the inside of the case.

The interposition portion 33 is bent around the outer peripheral surface of the end portion of the cylinder 5 with a gap, and extends between the coil end 7a of the rotor 7. That is, the cylinder 5 and the guide hole 18 provided in the cover body 6a are opposed to each other with a gap, and only the end portion on the opposed side is opened.

As described above, the diameter of the upper half portion is large and the diameter of the lower half portion is small, so that the gap with the peripheral surface of the cylinder 5 is different between the upper and lower portions. To be done.

A compressor constructed in this way,
As the motor section 4 is energized, the rotor 6 and the cylinder 5
And rotate together. The rotational force of the cylinder 5 is transmitted to the piston 8 via the Oldham mechanism 25. The piston 8 is pivotally supported at an eccentric position with respect to the cylinder 5, but due to the action of the Oldham mechanism 25, the cylinder 5 and the piston 8 have a relative peripheral speed due to the difference in radius between them.
In addition, they rotate synchronously while maintaining their mutual positional relationship.

As the cylinder 5 and the piston 8 rotate, the pair of blades 10 and 10 simultaneously move in and out of the respective grooves, and the piston 7 is projected and retracted in the radial direction. A compressed gas, for example, a refrigerant gas in the refrigeration cycle is sucked from the suction pipe 14, and is passed through the pivot hole 12a formed in the main bearing 12 and the gas suction guide passage 15 to a substantially middle portion of the cylinder 5. Be guided.

The substantially middle portion of the cylinder 5 between the blades 10 and 10 is the compression chamber located on the most suction side among the compression chambers 11 formed on both the left and right sides, and from this point to the most extraction side. It is sequentially transferred to the left and right compression chambers to be positioned.

The refrigerant gas is gradually compressed while being sequentially transferred through the compression chambers 11. Then, when it is transferred to the compression chambers 11, 11 that are the most derived sides of the left and right ends,
Raise to a specified pressure.

The high-pressure gas is discharged from one of the compression chambers 11 through a discharge guide hole 17 provided in the cylinder bearing 16a, collides with the end surface of the main bearing 12 once, and then the outer peripheral surface of the cylinder 5 and the fluid guide. The gap between the member 26 and the interposition part 28 is guided and guided into the closed case 1.

The high pressure gas is supplied to the electric motor unit 4 and the fluid guide member 2.
The gas guiding hole 31 provided in the partition part 29 is guided and filled in the space between the partition part 29 and the partition part 29.
It is guided to the end side of the case 1 through the discharge pipe 19b and discharged to the external refrigeration cycle equipment.

The high-pressure gas discharged from the other compression chamber 11 is a guide hole 18 ... Derived in the cylinder 5 and the cover body 6a.
, And once collides with the interposition part 33 of the fluid guide member 27 facing the hole. Further, it is guided into the gap between the interposition part 33 and the stator coil end 7a and is guided into the closed case 1.

The high pressure gas is supplied to the electric motor unit 4 and the fluid guide member 2.
The space between the partition 7 and the partition 32 is guided and filled, and is further guided to the case 1 end side through the gas guide hole 35 provided in the partition, and is discharged from the discharge pipe 19a to the external refrigeration cycle. It is discharged to the equipment.

The high-pressure gas guided out of the respective guide holes 17 and 18 is stopped by the interposition parts 28 and 33, respectively, and does not spray the lubricating oil surface of the oil reservoir 20. Therefore, the oil surface of the lubricating oil is not affected by the direct spraying of the high pressure gas, and the oil surface is not disturbed.

On the other hand, as the cylinder 5 and piston 8 rotate, the oil supply mechanisms Sa and Sb function. The oil supply pump portions 22a and 22b suck up the lubricating oil in the oil sump portion 20 via the oil suction passages 21a and 21b and supply the oil to the sliding portions. At this time, since the oil surface is not disturbed due to the presence of the intervening portions 28 and 33, the oil suction passages 21a and 21b smoothly suck up the lubricating oil, and the oil supply efficiency is good.

Further, the high-pressure gas is once guided out of the intervening portions 28 and 33 between the partition portions 29 and 32 and the electric motor portion 4, and thereafter, through the gas guiding holes 31 and 35 to the partition portions. Since it is guided between the end of the closed case 1,
The pressure between the partition section and the electric motor section becomes higher than that in the space chamber between the partition section and the end of the closed case.

Therefore, the lubricating oil surface of the oil sump portion 20 between the partition portions 29, 32 and the electric motor portion 4 is further lowered, and the rotor 6 is not immersed in the lubricating oil even at the bottom. The lubricating oil is not splashed or agitated as the rotor 6 rotates, and the lubricating oil surface is held gently.

On the other hand, the lubricating oil surface between the partition portions 29, 32 where the suction opening ends of the oil suction passages 21a, 21b are located and the end portion of the case 1 rises, so that the lubricating oil can be reliably sucked up. Therefore, the oil supply mechanisms Sa and Sb maintain a reliable oil supply action.

Even if the lubricating oil surface between the partition sections 29 and 32 and the electric motor section 4 is disturbed for some reason, each partition section regulates the disturbance and the oil suction passage 2
It does not affect the 1a and 21b sides. Then, the oil guide notches 30 and 34 provided in the partitions 29 and 32, respectively.
, But provides a smooth conduction guide for the lubricating oil in the oil sump 20.

The lubricating oil, which is guided from the oil supply pump parts 22a and 22b to the sliding parts of the compression mechanism part 3 and ensures their lubricity, is mixed with the gas compressed in the compression chamber 11 and finally becomes a high pressure. It is led out from the compression chamber 11 on the discharge side together with the gas.

From the compression chamber 11, guide holes 17, 18 are drawn out.
When the high pressure gas mixed with oil collides with the end surface of the main bearing 12 or the intervening portion 33, it further collides with the interposing portion 28 or the stator coil end 7a.

Finally, after colliding with the partition parts 29 and 32, they are guided to the discharge pipes 19a and 19b. Therefore, the oil component of the lubricating oil mixed with the high-pressure gas is completely separated from the gas in the closed case 1, and only the lubricating oil returns to the oil sump 20.

In this way, the proportion of the oil component of the lubricating oil mixed with the high pressure gas discharged from the discharge pipes 19a, 19b is reduced, and the oil amount in the oil sump 20 is secured. A fluid guide member 27A as shown in FIGS. 3 and 4 may be adopted. Since the configuration of the fluid compressor in this case is basically the same as that described above with reference to FIGS. 1 and 2, the same parts are designated by the same reference numerals and a new description will be omitted. It should be noted that here, the difference is that the cylinder bearing as described above is not used, but it goes without saying that there is no problem even if the cylinder bearing is used here.

The fluid guide member 27A is composed of an intervening portion 33a, which will be described later, and a partitioning portion 32 provided integrally with the interposing portion 33a. That is, it is basically the same as that described above.

The partition section 32 partitions the interior of the closed case 1 into a space chamber on the side of the electric motor unit 4 and a space chamber on the side of the end of the case 1, and the notch 3 for guiding oil in the lubricating oil in the oil reservoir 20.
No. 4 is provided, and the gas guide hole 35 is provided at a position facing the inside of the case on the oil surface.

Here, the interposition part 33a is a cylindrical body having the same diameter over the entire circumference thereof, and has the same distance over the entire circumference of the cylinder 5 circumferential surface. This outer diameter φda
Is the inner peripheral surface diameter φDa of the stator coil end 7a.
Formed smaller than. Diameter φ of the inner peripheral surface of the interposition part 33a
db is formed to be larger than the outer peripheral surface diameter φDb of the cylinder 5.

Therefore, φDa>φda>φdb> φ
The relationship of Db is established, and the interposition part 33a is interposed between the stator coil end 7a and the cylinder 5. Furthermore, the protrusion length la of the upper half portion of the interposition part 33a is
Is shorter than the protruding length lb of the lower half portion.

Also in such a fluid guide member 27A, the interposition part 33a and the partition part 32 function in the same manner as the fluid guide member 27 described above. Further, since the protruding length lb of the lower half portion of the interposition part 33a is formed longer, the high pressure gas led out from the lead-out guide holes 18 regulates the lubricating oil in the oil sump portion 20 located below and discharge pipe. 19a
Guide the gas smoothly.

Of course, the application of the fluid compressor of the present invention is not limited to the refrigeration cycle. The present invention can be variously modified without departing from the scope of the invention.

[0070]

As described above, according to the present invention, as a fluid guide member, the intervening portion provided between the high pressure fluid lead-out portion and the lubricating oil surface of the oil sump portion is partitioned from the inside of the closed case. Along with the oil guide hole at the position in the lubricating oil, and the partition part having the gas guide hole above the oil sump are continuously provided,
This fluid guide member prevents the disturbance of lubricating oil in the oil sump,
The oil is sucked up reliably, the lubrication efficiency is improved, the lubricity of the sliding portion is ensured, and the amount of lubricating oil discharged to the outside is suppressed, so that the necessary amount of oil is secured.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a fluid compressor according to an embodiment of the present invention.

FIG. 2A is a vertical cross-sectional view of a fluid guide member and peripheral members of the same embodiment. (B) is a partial cross-sectional view thereof.

FIG. 3 is a vertical cross-sectional view of a main part of a fluid compressor according to another embodiment.

FIG. 4 is an exploded vertical cross-sectional view of the main part of the embodiment.

[Explanation of symbols]

14 ... Suction pipe, 19a, 19b ... Discharge pipe, 1 ... Sealed case, 5 ... Cylinder, 8 ... Rotating body (piston), 11 ... Compression chamber, 10 ... Blade, 25 ... Rotational force transmission mechanism (Oldham mechanism) , 20 ... Oil sump, Sa, Sb ... Oil supply mechanism, 2
6, 27, 27A ... Fluid guide member, 28, 33, 33a
... Intermediate part, 29,32 ... Partition part, 30,34 ... Oil guide hole (oil guide notch), 31,35 ... Gas guide hole, 4
... electric motor part, 7a ... stator coil end, 12 ... main bearing, 13 ... auxiliary bearing.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Motokatsu 70 Yanagicho, Sachi-ku, Kawasaki-shi, Kanagawa, Toshiba Yanagimachi Co., Ltd. In the factory (72) Inventor Teruhisa Tsunekawa 8th Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture

Claims (8)

[Claims] 1. A hermetically sealed case to which a suction pipe and a discharge pipe are connected, a cylinder which is housed in the hermetically sealed case and is driven to rotate, and an eccentric arrangement in the cylinder, which is formed on the peripheral surface at a gradually decreasing pitch. A rotary body having a spiral groove formed therein, and a spiral blade that is fitted into the groove of the rotary body so as to be freely inserted into and removed from the rotary body to form a plurality of compression chambers having gradually smaller volumes in the cylinder. And a rotational force transmission mechanism that transmits the rotation of the cylinder to the rotating body and compresses the fluid to be compressed sucked into the compression chamber on the suction side while gradually transferring it to the compression chamber on the derivation side. In the provided fluid compressor, an oil sump portion, which is provided in the closed case and collects lubricating oil to be supplied to each sliding portion such as the cylinder, the rotating body, and the blade, and the lubricating oil oil in this oil sump portion Surface and high pressure fluid above And an intervening part that is interposed between the part and the high-pressure fluid that is drawn out from the lead-out part and that guides it into the closed case by preventing it from hitting the lubricating oil surface of the oil sump part A fluid guide member that is connected to the oil reservoir to partition the inside of the closed case and has an oil guiding hole at a position in the lubricating oil and a partitioning section having a gas guiding hole above the lubricating oil. A fluid compressor characterized in that 2. The fluid compressor according to claim 1, wherein the interposing portion of the fluid guide member is a cylindrical body provided in parallel with the outer peripheral surface of the cylinder end portion with a gap. 3. The partition portion of the fluid guide member is interposed between the high pressure fluid outlet opening end of the interposition portion formed of a cylindrical body and the discharge pipe connection portion of the sealed case. 2. The fluid compressor according to 2. 4. A motor drive unit comprising a rotary drive source for the cylinder, the rotor being fitted onto the cylinder, and a stator provided in a closed case with a narrow gap from the outer peripheral surface of the rotor. 3. The fluid compressor according to claim 2, wherein the interposition part formed of the cylindrical body is extended such that an opening end of the high-pressure fluid lead-out part is interposed between the electric motor part and the partition part. 5. A rotary drive source for the cylinder includes an electric motor section having a rotor fitted onto the cylinder and a stator provided with a narrow gap from the outer peripheral surface of the rotor and housed in a closed case. 3. The interposing portion formed of the cylindrical body is extended such that the high-pressure fluid outlet opening end thereof is interposed between the stator coil end of the electric motor portion and the cylinder outer peripheral surface. Fluid compressor. 6. A fluid compressor according to claim 2, wherein the diameter of the lower half portion of the intervening portion made of the cylindrical body is smaller than the diameter of the upper half portion. 7. The fluid compressor according to claim 2, wherein the intervening portion formed of the cylindrical body has a lower half portion having a protruding length longer than an upper half portion thereof. 8. A sealed case having a suction pipe connected to one end and a discharge pipe connected to both ends, a cylinder housed in the sealed case and driven to rotate, and an eccentric arrangement in the cylinder. And a rotary body having a pair of spiral grooves formed on the peripheral surface from the intermediate portion in the axial direction toward the both ends at a gradually decreasing pitch, and fitted into the grooves of the rotary body so as to be freely inserted and removed. A spiral blade for partitioning to form a plurality of compression chambers having gradually smaller volumes in the cylinder, and a fluid to be compressed provided along the axial direction of the piston and guided from the suction pipe. The suction guide path leading to the intermediate compression chamber and the rotational driving force of the cylinder are transmitted to the rotary body, and the fluid to be compressed sucked into the intermediate compression chamber from the suction pipe via the suction guide path is gradually discharged. While transferring to the compression chambers at both ends A fluid compressor provided with a rotational force transmitting mechanism for compressing, an oil reservoir portion provided in the closed case for collecting lubricating oil to be supplied to each sliding portion such as a cylinder, a rotor and a blade, It is interposed between the lubricating oil surface of this oil sump and the above-mentioned outlet of the high-pressure fluid, and prevents the high-pressure fluid discharged from the outlet from spraying on the lubricating oil surface of the oil sump. And an intervening part for guiding the inside of the closed case with the intervening part to partition the oil sump part and the inside of the closed case integrally with the intervening part, and an oil guide hole at a position in the lubricating oil and a gas guide at a position above the lubricating oil. A fluid compressor comprising: a pair of fluid guide members including a partition portion having a hole for use.