JPS6073079A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To reduce the thrust force of a scroll type compressor to prevent the compressor from increasing its input and from seizing, by forming annular grooves in the opposite surfaces of a movable element and of an abutting member forming a closed annular space on the lower surface of the movable element, and by fitting seal rings onto the inner and outer side of the annular grooves. CONSTITUTION:A thrust force reducing mechanism 149 comprises an annular member 150 fitted onto and supported by an annular receiving surface 146, an annular groove 151 formed in the upper surface of the annular member 150, shallow and thin annular grooves 152, 153 formed in the above-mentioned upper surface on the inner and outer sides of the annular groove 151, and seal rings 154, 155 fitted in the annular grooves 152, 153 so that they are projected in part outward from the grooves 154, 155. With this arrangement, no gas leakage occurs from the thrust force reducing mechanism 149. Accordingly, the thrust force is efficiently reduced.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a scroll type compressor 'Jfit' in a closed container.
This invention relates to an improvement in a scroll compression device that accommodates a scroll.

[Background Art of the Invention and Intervals Therebetween/Main Points] Conventionally, a scroll type compression device has been known as a low-pressure compressor. This pressure 41M device combines a pair of scroll blades in the axial direction to achieve compression pressure 1'ii.

It has the following advantages: small size, high efficiency, and low vibration.

By the way, such a scroll type compression device usually
It is constructed as shown in FIG.

That is, a frame 2 is fixed at a position slightly upwardly within the hermetic container 1 in a form that partitions the inside of the hermetic container 1 in the vertical direction, and above the frame 2 the double scroll compressor Ftn is fixed.
A motor 4 for driving the scroll type compression mechanism is disposed below the frame 2, and a lubricating oil 5 is housed in the bottom of the closed container 1.

The scroll type compression mechanism is composed of a fixed element 11 and a movable element 12 arranged below the fixed element 11. The fixing element 11 includes a disk-shaped mirror plate 13, an annular wall 14 protruding from the peripheral edge of one side of the mirror plate 13, and a portion surrounded by the annular wall 14 having a height approximately equal to that of the annular wall 14. It is composed of a scroll blade 15 projecting from above, a discharge port 16 provided at the center of the end plate 13, and a suction port 17 provided at the peripheral edge of the end plate 13. In the fixing element 11 configured as described above, the peripheral edge of the annular wall 140 is fixed to the upper surface of the frame 2 with the protruding direction of the annular wall 14 and the scroll blades 15 facing downward, and the suction port 17 is fixed to the upper surface of the tank 1. The suction pipe 18 is connected to a suction pipe 18 which is provided through the upper wall of the pipe in an airtight manner. On the other hand, the movable element 12 is
A mirror plate 19 having an outer diameter larger than the inner diameter of the annular wall 14; a scroll blade 20 cut out on one surface of the plate 19 at a height approximately equal to -15 of the scroll blade 15; cylindrical portion 2) protruding from the center of the other plate 19;
It is combined with. The movable element 12 is configured such that the scroll blades 20 and 15 are engaged with each other with the protruding direction of the scroll blades 2Q being upward, and the mirror plate 1
9 is attached so that the peripheral portion thereof is in sliding contact with the end surface of the annular wall 14, and in this attached state, the mirror plate 19 and the frame 2 described above are attached.
It is held by an alternating machine h'#31 installed between the two.

As shown in FIG. 2, the Oldham front 31 has keys 32a and 32b fixed on the lower surface of the mirror plate 19 and on the same line on both sides of the cylinder 21, and the frame 2. Keys 3.9. fixed on the top surface and on a line perpendicular to the arrangement line of the keys 32a, 32b. a, 33
b, and a ring 35 having grooves 34a to 34d on the upper and lower surfaces into which the keys 33a, 33b, 32a, and 32b are respectively fitted with minute gaps.

The frame 2 is provided with a bearing hole 4 which is eccentric from the axis of the cylindrical portion 21 and extends vertically through the frame 2 . The bearing hole 41 is formed to have a large diameter at a portion located on the cylindrical portion 21 side. The rotating shaft 42 of the motor 4 described above is rotatably supported within the bearing hole 41. The rotating shaft 42 has a large diameter portion 43 formed in a portion located in the large diameter portion of the bearing hole 41 described above, and a small shaft 44 that fits into the cylinder portion 21 described above is formed in this large diameter portion 43. ing. Note that the lower end of the rotating shaft 42 is coated with lubricating oil 5.
The hole 45 is formed in such a length that it penetrates into the inside, and a hole 45 is formed in the inside for pumping the lubricating oil 5 to the bearing surface and the fitting part between the cylindrical part 21 and the small shaft 44 by a centrifugal pump action. Also,
In FIG. 1, numeral 46 indicates a discharge pipe that sends out high-pressure gas to the middle part in the vertical direction inside the closed container 1, and 47 indicates a groove that guides the high-pressure gas and lubricating oil downward.

Accordingly, this device performs the gas moon-hog in the following manner. That is, when the motor 4 is rotated, its rotational force becomes dIIl+4. ? ra: is transmitted to the movable element 12 via. This l gift, "" dynamic element 12
The cylindrical part 21 is centered at 1λ111 with respect to the axis 42, and is still supported by Oldham (tf #31), so this movable element 12 performs a turning motion without rotation. The scroll blades 20 of the element 12 also perform a swirling motion.

Along with this swirling movement, the volume of the so-called compression chamber P formed between the scroll blades 15 and 20 increases as shown in Figure 83(a).
As shown in , (b) and (c), the compressed gas is discharged from the discharge port 16 periodically by small holes, thereby functioning as a compression device.

However, as mentioned above, there were the following problems with the scroll-type compressor that was constructed in 1 (° 4). When the refrigerant is removed, the low-pressure refrigerant that has passed through the evaporator is directly introduced into the compression chamber P. Therefore, the liquid returns!
There is a possibility that 7 phenomena will occur. When this liquid return phenomenon occurs, it damages the scroll blades 15, 20. Therefore, in the conventional apparatus, it was necessary to provide a large volume gas-liquid separator between the evaporator and the suction pipe 18. This is no good,
There was a problem in that a space was required to install the gas-liquid separator, resulting in an increase in the size of the entire device. The inside of the tank 1 is maintained at high pressure, and the motor 4 is installed within this high pressure. As is well known, when gas is compressed to high pressure, this high pressure gas becomes high temperature. However, with the above configuration, special measures have to be taken to cool the motor 4, and a larger capacity motor must be installed from the beginning to ensure a temperature margin.

Therefore, in order to eliminate such problems, the discharge pipe 46 is used as a suction pipe, and the suction pipe 18 is connected to the space between the earthen wall of the closed container 1 and the fixing element 11 and used as a discharge pipe. ,
Still, it is conceivable to suck low-pressure gas into the compression chamber P from the periphery of the sliding contact portion between the fixed element 11 and the movable element 12.

In this way, the lower space inside the closed container 1 can be used as a gas-liquid separator, and low-pressure, low-temperature gas can be brought into contact with the motor 4, so that the above-mentioned problems can be solved.

However, if 114 is completed as described above, the following new problems will arise! I will. In other words, when the movable element 12 performs a pivoting motion and a compression operation is performed,
Pressure X61 'tX Since pressure inside P becomes high, movable element
A downward thrust force acts on 2.

For example, this thrust force has a degree of 51P4.
It can reach up to 00 kg. Since this thrust force is applied to the sliding parts such as J1 and the front of the Oldham machine, the sliding loss not only increases and the input power increases, but also causes burn-out phenomenon.

Furthermore, if the thrust force is large, the tip portions of the scroll blades 15, 2θ are separated from each substrate, creating a gap. When such a gap occurs, leakage of compressed gas increases, which inevitably leads to a decrease in performance. Shikatsuko,
It is desired to develop a device that can significantly reduce the above-mentioned thrust force.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and its purpose is to reduce the downward thrust force applied to the movable element when the lower surface side of the movable element is used in a low pressure atmosphere. It is an object of the present invention to provide a scroll-type compression device that can significantly reduce the amount of noise without causing any negative impact or strain on the back, thereby reducing input, preventing burn-in, and improving performance.

[Summary of the invention]

The present invention provides a scroll-type compression device in which the lower surface side of the movable element is operated in a low-pressure atmosphere, and a member that forms a closed annular space along the lower surface of the movable element; and a communication path that communicates the compression chamber with the annular space. In addition to forming an annular groove for forming the QQ annular groove, shallow slender grooves are provided inside and outside the QQ annular groove, the bottoms of which communicate with the annular groove at multiple points, and within these thin plate-shaped grooves, It is characterized by a seal ring attached to the other opposing surface.

〔Effect of the invention〕

With the above configuration, the high pressure 11"xB in the compression chamber enters the annular space via the communication path described above.

Therefore, high pressure is maintained within the annular space.

The annular space includes the lower surface of the movable element as part of I'! l′
Since the movable element is formed with an upward force, an upward force acts on the movable element. Therefore, due to this upward force, the downward thrust force is significantly reduced, thereby making it possible to prevent an increase in input and the occurrence of burn-in. Furthermore, since the seal ring is mounted on the facing surface of the abutting member and the movable element as described above, the seal ring is always subjected to an upward force in a direction in which the seal ring is pressed against the other surface. Therefore, even if the downward thrust force applied to the movable element fluctuates, the annular space described above does not communicate with the low pressure section, and as a result, leakage of high pressure gas from the thrust force reduction mechanism can be prevented. The thrust force can be reduced while preventing the occurrence of adverse effects due to the provision of the tab and thrust force reduction mechanism.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 4, reference numeral 101 indicates a vertically elongated sealed container, and a frame 102 is identified at an upper position within the sealed container 101 to partition the inside of the sealed container 101 in the vertical direction. There is. And frame 102
A scroll compressor l'g103 is arranged above the
Further, the scroll type pressure A'f is applied below the frame 102.
111 Motor 10 for applying driving power to front engine L1
4 is arranged, and lubricating oil 105 is further stored at the bottom of the closed container 101.

The scroll type compression mechanism Bo-ri is composed of a fixed element 111 and a movable element 112 disposed below the fixed element 111, similar to known ones. Fixed element 1
Reference numeral 11 denotes a disk-shaped end plate 113, an annular wall 114 protruding from the peripheral edge of one surface of this end plate 113, and this annular wall 1.
Scroll blades 115 protruding at a height approximately equal to the annular v:, 114 in the area surrounded by 14, and a mirror plate 113.
The discharge port 116 is provided approximately at the center of the discharge port 116. The inner edge of the annular wall 114 is formed into a curved surface with an appropriate curvature or a notched surface 117 such as a chi-9 surface as shown in FIGS. 5(a) and 5(b).

Therefore, the fixed element 11 configured as described above is
The circumferential edge of the annular wall 1140 is airtightly fixed to the circumferential edge of the upper surface of the frame 102 by a pole 118 with the protruding direction of the annular wall 114 and scroll blades 115 facing downward. Note that a cap 119 is applied to the top surface of the fixing element 111 during fixation, and this character f119 is also fixed integrally with the bolt 118.
19 is a gap 120 with a predetermined thickness between the upper surface of the end plate 113 and
This gap 120 is formed to a size that can form a
A hole 121 is formed in a part of the wall that forms the hole. Moreover, a hole 122 for guiding lubricating oil, which will be described later, is formed in a part of the side wall. On the other hand, it is possible! The Il element 1/2 includes a mirror plate 123 having an outer diameter slightly larger than the inner diameter of the annular wall 114, and a scroll blade 124 protruding from one surface of the mirror plate 123 at a height approximately equal to the height of the scroll blade 115. and a cylindrical portion 125 protruding from the center of the other plate of the @'8 plate 123. The peripheral edge of the mirror plate 123 on the side on which the scroll blades 124 protrude is formed into a chi-shaped notch 126, as shown in FIGS. 6(a) and 6(b). . In the movable element 112 configured as described above, the scroll blade 124 and the front scroll blade 115 are engaged with each other with the protruding direction of the scroll blade 124 being upward, and the peripheral part of the mirror plate 123 and the annular wall 114 are engaged with each other. The end face of the scroll blade 124, the 3W surface of the scroll blade 124, the acid 3 plate 113, and the 'jJ surface of the scroll blade 115 and the mirror plate 123 are installed so as to be in sliding contact with each other, and this installation state is as described in 4. above. 'U board 1
23 and the frame 102 is held by an Oldham iM Ik 130.

The Oldham mechanism 130 is located at the periphery of the upper surface of the end plate 123, and at the center of the end plate 123.

131b and this keyway 1.91a, 13l
A key groove 1.92 provided on a line perpendicular to the arrangement direction of b and on the upper surface of the frame 102 as shown in FIG.
a, 132b, and keys 133a, 133b that fit into the keyways 131a, 1.9lb on one surface, as shown in FIG. 7, and the keyways 132a, 132b on the other surface. Key 1 inserted into
．． 34a, 134. It is opened with a ring 135 having b. In fact, on both sides of the ring 135, as shown in FIG.
For example, a mesh-like oil groove 136 is formed. still,
Each of the keys filj 132a, 132b,
131 a.

An enlarged step 137 is formed on the inner surface of the key groove 131b to reduce the sliding area with the key, as represented by the key groove 132b in FIG.

Therefore, the frame 102 has the movable element 11
The bearing hole 141 is eccentric with respect to the axis of the cylindrical portion 125 of No. 2.
is provided vertically through the bearing hole 14.
The portion located on the cylindrical portion 125 side of No. 1 is formed to have a large diameter. The frame structure on the larger diameter side is specifically constructed as shown in FIG. That is, an annular wall 142 is formed on the outermost side, which has an outer diameter approximately equal to the inner diameter of the closed container 101 and has an inner diameter larger than the inner diameter of the annular wall 114, and the annular wall 114 is tightened and fixed by the bolt 118. There is an annular groove 14 inside this.
An annular receiver that receives the peripheral portion of the lower surface of the end plate 123 through the ring 123 is formed by lowering the surface 144 one step further, and an annular receiver that receives the ring 135 on the inner side thereof is formed by further lowering the surface 145 one step further. The annular receiver that is further lowered by one step and receives the thrust force reducing device +177149 described later is surface 1.
46 is formed. The surface of the pedestal is divided into a plurality of parts in the circumferential direction by the radially provided 147.
At least one of the grooves 147 is a hole 148 that is provided in the wall of the frame 102 and directly communicates with the interior of the frame 102.
is familiar with N: I6, the keyway 132a, 132
In b, the receiver is formed on the surface 145. Specifically, the thrust force reduction groove 149 is as shown in FIG.
b) As shown in (C), the annular receiver includes an annular body 150 fitted and supported by the surface 14G, an annular groove 151 carved on the upper surface of this annular body 150, and an annular groove 1 formed on the upper surface.
Annular grooves 152, 153 that are shallower and narrower than the annular groove 15 are formed on the inside and outside of the annular groove 15, respectively, and annular grooves 152, 153 are installed in these annular grooves 152, 153 so that a part thereof projects outward, for example. Seal rings 154 and 155 are made of tetrafluoroethylene.
Although the tapered surface 156 is formed as shown in FIG.
A similar tapered surface is also formed at the lower end of the inner peripheral surface of the seal ring 155. At four positions in the circumferential direction of the groove 151, the groove 1 has the same depth as the groove 151.
51 communicates with the annular grooves 152 and 153.
57 is formed. Then, inside the end plate 123, the annular body 151 and the seal ring 1 are attached with a thrust force reducing device 149 installed as shown in FIG.
54, 155, and holes 158, 159 that allow the annular space Q surrounded by the lower surface of the end plate 123 to always communicate with the medium pressure ports s and s' of the compression chamber P. A rotating shaft 160 of the motor 104 is rotatably supported in the bearing hole 141 of the frame 1θ2. A large diameter portion 161 is formed in the rotating shaft 16θ at a portion located in the large diameter portion of the bearing hole 141, and the aforementioned cylindrical portion 125 is fitted into the large diameter portion 16. J-1η1
1162 is provided protrudingly. And,” 2 episodes 1 tweet axis 1
60 is formed in such a length that its lower end penetrates into the lubricating oil 105, and its lower end is supported by a lower bearing 163 supported on the inner surface of the closed container 101 via a support member 200. In addition, inside the rotating shaft 160, r+:'S lubricating oil 105 is applied to the aijll receiving surface and the small' by centrifugal pump action.
Hole 1 for pumping into the fitting part between Ml 162 and cylinder part 125
64 is formed. The entrance part of this hole 164 is
The shape of the portion located at the lower end of the rotating shaft 16θ is a portion 165 extending upward from the center of the lower end of the rotating shaft 160.
, a portion 166 extending radially from this portion 165 to the inner surface of the lower bearing 163 , a portion 167 extending downward from this portion 166 , and a length slightly shorter than the diameter of the rotating shaft 160 from this portion 167 . 168 extending in the radial direction.

The motor 104 has a ratchet-type anti-reversal device 1 between the cage-shaped guide and the frame 102.
1) J 174 is provided, and a bottomed hole 175 is provided on the inner side of the and 173 toward the rotation center line, and a stopper opening and a door 176 are slidably provided in the bottomed hole 175. A spring 177 is provided between the rod 176 and the inner surface of the bottom wall of the bottomed hole 175 to apply a force in a direction that causes the rod 176 to protrude from the bottomed hole 175. A claw-shaped notch 178 is provided on the outer surface of the frame 102 in contact with the frame 102.

Therefore, in a portion of the side wall of the closed container 101 located between the scroll compressor Ht;los and the motor 104, the scroll compressor groove 103 and the motor 1
The suction S″18 is connected to the space 18θ between the
1 is connected to the upper wall of the closed container 10, which is connected to the opening 182 which communicates with the space 182 formed between this wall and the fixing element 111. 183 is conjugated'
It is L.

In addition, εi'fr 4 indicates a hole provided in the annular wall 114 and the frame 102 in order to return the lubricating oil pushed out into the fertile space 182 downward from the frame 102, and 185J' indicates a balance weight. ; Toshi, 186
indicates the liquid piling machine ti for power supply to the motor 104;
87 indicates a reservoir hole through which the oil passes.

Next, the pressure +1'jl'7 device created as above, i
The operation of 'f: will be explained.

First, when the motor 104 is fed, the rotating shaft 160 starts rotating 4k, and this rotational force is transmitted to the movable element 112. In this case, the cylindrical portion 125 of the movable element 112 is connected to the rotating shaft 1
Since the movable element 112 is fitted into the short sleeve 162 provided eccentrically with respect to the movable element 160 and is supported by the Oldham machine tf#i3o, the movable element 112 performs a circular movement accompanied by rotation. Therefore, the scroll blades 124 provided on the movable element 112 also perform a swirling movement. As a result of this swirling motion, the volume of the compression chamber P formed between the scroll blades 115 and 124 becomes smaller circumferentially as shown in FIG. The gas compressed by the cap 119 is discharged from the discharge port 116.The discharged high pressure gas is discharged from the gap 120 formed by the cap 119 to the hole 121 provided in the cap 119.
- is sent out from the discharge pipe 183 via the space 182.

On the other hand, when the movable element 112 rotates as described above,
The notch surfaces 126 and 117 are formed at the upper peripheral edge of the substrate 123 of the movable element 112 and the inner ψ1fli edge of the annular wall 114 of the fixed member 111. The peripheral edge of the chamber P is always in communication with the annular ring 143 formed in the frame 102. The annular groove 143 communicates with the hole 148 via a groove 147 provided radially in the frame 1θ2, and this hole 148 still communicates with the suction pipe 181 via the space 180, so that the low pressure gas eventually The above suction pipe 18 ~ space 18
It is sucked into the low pressure port in the compression chamber P via the 0 to hole 148 to groove 147 and the annular, 1゛·) 143, where the crosspiece fJt as a pressure IRtδ device is exerted. In this case, even if liquid such as refrigerant is mixed in the low-pressure gas that has flowed in through the suction 7d 1s 1, this liquid will fall downward while moving within the space 180, and the lubricating oil It attempts to move to the bottom of the tank 101 where 105 is stored. Since the motor 104 is self-heating, the falling liquid is gasified by the heat and mixed into the flow of the already gasified liquid, increasing the pressure t'll+.
Move into 4ip. Therefore, since the opening 18θ has exactly the same function as a gas-liquid separator, the existence of this space 180, its dimensions, and the presence of such a gas flow path can cause damage to the scroll blades 115°124. is prevented.

On the other hand, when the motor 104 rotates as described above, a portion of the lubricating oil 1θ5 is pumped upward into the hole 164 by the centrifugal pump action due to the shape of the hole 164. This pumped up lubricating oil lubricates the inner circumferential surface of the bearing hole 141 and then lubricates the fitting part between the small shaft 162 and the cylindrical part 125.
Subsequently, the part where the Oldham front 23o is provided is layered through the hole 187, and then -γiS flows downward from the hole 148, and the rest enters the compression chamber P. Lubricate the sliding parts inside.

Then, the lubricating oil that has entered the compression chamber P is finally discharged from the discharge hole 116, and then the lubricating oil enters the compression chamber P.

The liquid flows downward through the holes 122 and 184 provided in the pipe 119 . Therefore, from the discharge pipe 183, 7
1', J High pressure gas not mixed with lubricating oil will be discharged.

Further, as described above, when the movable element 112 performs a rotational movement and a compression operation is performed, the pressure inside the compression chamber P becomes high, so the movable element 112 receives a downward thrust force,
This force is applied to the receiving surface 144 of the frame 102 of the Oldham machine (1301), causing a burning phenomenon to occur in these elements, or leakage of the pressure force in the compression chamber P. However, this implementation '5
In the case of ij, the thrust force reduction compensation 149 prevents the occurrence of these phenomena as follows. Zunawaji, annular body 1501 seal ring 1 in front of thrust force reduction machine 149
The dish-shaped space Q surrounded by the plates 123 and 54, 155 communicates with the so-called intermediate pressure ports (S, S') of the compression chamber P through holes 158 and 159. Therefore, the plate 123 receives an upward force due to the force pressure within the annular wall Q, and due to the presence of this force, the downward thrust force applied to the mirror plate 123 increases.
) will be reduced by one. Therefore, the occurrence of phenomena such as input 1.1j addition, bulging, and leakage of compressed gas caused by the above-mentioned thrust force is prevented.

Note that the downward force applied to the movable element 112 pulsates as the position of the compression space changes. Therefore, there is a risk that high-pressure gas may leak from the thrust force reducing groove 149 to the low-pressure side. However, in this embodiment, as shown in FIG. Bottomed hole 15 communicating with grooves 152 and 153
7, a force is always applied to the seal rings 154 and 155 as shown by the solid arrows in FIG.

Therefore, this pressing prevents high pressure gas from leaking.

Furthermore, when the motor 104 is stopped, the pressure difference between the spaces 182 and 180 may cause the movable element 112 to rotate backwards, causing high pressure gas to flow into the low pressure side. but,
In the case of this embodiment, a ratchet type anti-reversal device is purchased.
Since this is provided, the occurrence of reverse swirl is reliably prevented and the outflow of high pressure gas is prevented.

In this way, the movable element 1 is placed on the lower surface side of the movable element 112.
A thrust force reduction lever [IS 749] is provided to reduce the downward thrust force applied to the engine. Therefore, it is possible to prevent input from becoming warm due to the downward thrust force during movement, occurrence of seizure, and increase in leakage of compressed gas. 7-
Since we have adopted a configuration in which an upward force is always applied to the thrust rings 154 and 1.55, even if the thrust force pulsates, the thrust force will be reduced. , the above-mentioned effect can be obtained.

Note that this invention is not limited to the above-mentioned embodiments. In other words, a groove in the shape of ``1'' is provided on the lower surface of the movable vortex, and a groove is placed on the lower surface of the annular vortex to create an opening. It is also possible to provide "I" for planting and "I" for planting.

[Brief explanation of the drawing]

Figure 1 is a vertical Lim 1 diagram of a conventional device of this type, Figure 2 is an explanatory diagram of the Oldham mechanism built into the four limbs (1 inch), and Figure 3
The figure is a diagram for explaining the compression source of the device, FIG. 4 is a vertical cross-sectional view of a scroll-type compression device according to the first aspect of the present invention, and FIG. 6(b) is a sectional view taken along line A-A in FIG. 6(a) under installation conditions, and FIG. 6(a) is a bottom view of the movable element in the device. Figure (b) is B-BM in (a)! 7 is a partially cutaway exploded perspective view showing only the upper part of the frame of the same device, and FIG. 8 is a plan view of the main part of Oldham's machine groove in the four limbs. The figure is a diagram to explain the shape of the key load of the same Oldham (3i?'7), and the at i o diagram (a) is the thrust force reduction (top view of the thread groove) incorporated in the same device. (b) is a view taken along the line C-C in (a), and (c) in the same figure
11 is a diagram for explaining the shape of the seal ring installed in one aircraft (5i5), and FIG. 11 is a view of the DD line cut in FIG. 4. 101... Sealed container, 1θ2・・Frame, 1o3・
・Scroll type pressure 1 machine front, 1o4...motor, l
θ5...Lubricating oil, 111...Chang1 constant element, 112 Movable rationale, 115,124...Scronohe 4.116
,,,discharge port, 130 Oldham'II's') t
i'1.141...Bearing hole, 143...Annular? l'
j, 147...i]゛・), 148...hole, 149
・・・Thrust force・(”賎・１．”、：l'i」ト、１
6θ・Rotation [Bullet, 164...Centrifugal pump daily use hole, 17θ...Rotor, 171・Rotator, 174・
Reversal prevention machine +1゛4.18θ, 182..., 18
1...Suction pipe, 183...Discharge pipe. Applicant's agent Attorney '#'I'r? l-bu L'
LFigure 1 Figure 2 34d JJb Figure 5 (a) 13 +17 114 Figure 3 Figure 6 (a) (b) 26 23 Figure 7 Figure 8 Figure 9 146145 Figure 10 (c)

Claims (1)

[Claims] A scroll consisting of a fixed element and a movable element, each of which is joined in the axial direction to form a groove bottom of a compression chamber between them, and each of which has scroll blades that engage with each other within the compression chamber. mold compressor (14,
The fixed element is placed on the upper side and the movable element is placed on the lower side in a closed container, and the lower surface of the movable element is placed in a low pressure atmosphere. In a scroll-type compression device that compresses gas by causing the movable element to perform a rotational motion without rotation using power, the scroll-type compressor is provided in sliding contact with the lower surface of the movable element, and is closed along the lower surface with the lower surface. A thrust force reduction bi IJ# is provided, which includes a further member forming an annular space formed by the above-mentioned movable element, and a communication path provided in the movable element to communicate the compression chamber with the annular space, An annular space for forming the annular space on either one of the opposing surfaces of the ? 111 is formed, and a plurality of bottom portions are formed on the inside and outside of the above-mentioned annular shape.
A scroll-type compression device, characterized in that thin plate-like grooves are provided which are shallower than the annular groove communicating with the above-mentioned annular grooves, and a seal ring that is in contact with the other of the opposing surfaces is installed in each of these thin plate-like grooves.