JPS62113880A - Scroll fluid machine - Google Patents

Abstract

PURPOSE:To reliably lubricate the bearing section by forming a moving space between the peripheral wall of an end plate of a swivel scroll member and the inner wall of a fixed scroll member and performing the pumping function forcibly in accordance with the swivel motion of the swivel scroll member. CONSTITUTION:In a scroll fluid machine, rotation of a crankshaft 20 caused by driving a motor section 12 will cause swivelling of a swivel scroll member 15 and sequentially compress the compression chambers 111 formed between its swivel lap 14 and a fixed lap 17 at the fixed scroll section 19, thereby the refrigerant gas from a suction path 35 is compressed and fed through a delivery port 29 to the outside. Here, a moving space 30 is formed between the outer circumferential moving wall 301 of an end plate 13 of the swivel scroll member 15 and the inner wall 191 of the fixed scroll member 19. Then one end of an oil suction path 35 having the other end opened into the oil 34 is opened to the moving space 30 while one end of a lubrication path 36 having the other end connected to an oil path 37 communicated with the bearing section is opened to the moving space.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a scroll fluid machine, and specifically relates to oil supply to a bearing portion.

[Background of the invention]

For example, a scroll fluid machine is equipped with a fixed scroll member and an orbiting scroll member in which a spiral wrap is upright on an end plate, the scroll members are engaged with each other inwardly, and the orbiting scroll makes an orbital movement so as not to apparently rotate. 1977-120710, JP 55-4608
1 and Utility Model Application Publication No. 55-76485, etc.

In the conventional scroll fluid machine as mentioned above,
Lubricating the bearings uses pressure differences and centrifugal force, but the bearings of orbiting scrolls have a cantilevered structure and are under very severe conditions in terms of bearing loads. The weak point was that the reliability of the sex was low.

[Purpose of the invention]

An object of the present invention is to provide a further improved scroll fluid machine in which the bearing portion is reliably lubricated.

[Summary of the invention]

In order to achieve the above object, the present invention includes a fixed scroll member and an orbiting scroll member in which a spiral wrap is upright on an end plate, and the orbiting scroll members are engaged with each other inside. In a scroll fluid machine that performs orbital motion so as not to apparently rotate, a moving space is formed by the outer circumferential wall of the end plate of the orbiting scroll member and the inner wall of the fixed scroll member or the fixed wall of the frame, one end is opened in oil, and the other end is opened in oil. An oil suction passage whose end opens into the moving space is provided through the fixed wall, and an oil supply passage whose one end opens into the moving space and the other end communicates with the bearing portion penetrates the wall forming the moving space. This is characterized by a configuration in which the bearing part is more reliably lubricated by utilizing the forced pumping action accompanying the orbiting movement of the orbiting scroll. By providing a vane that is in constant contact with one wall forming the space and whose rear end is inserted via a spring into a groove provided in the other wall, it is possible to perform a vane pumping action, which further improves @receiving part. can be reliably refueled.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Inside the horizontal airtight container 10 is a compressor section 11 and an electric motor section 12.
are stored in series. The compressor section 11V'i has a spiral wrap section 14 standing upright on the end plate 13, an orbiting scroll member 15 that performs a rotating motion, a spiral wrap section 17 standing upright on the end plate 16, and a frame 18 with bolts, etc. It is formed by interlocking fixed scroll members 19 fixed at υ. A crank bin 21 is formed at the end of a crankshaft 20 that is integral with the rotating shaft of the electric motor 12, and an oil passage 37 is bored in the crankshaft 20.
An oil hole 39 for supplying oil to the bearing portion 43 of the crank bin 21 is formed to communicate with the oil passage 37 .

Further, the end plate 13Vc of the orbiting scroll member 15 has the communication hole 2 at a position where the pressure is approximately intermediate between the suction pressure and the discharge pressure.
3, and an intermediate pressure space chamber 24 having an intermediate pressure is provided. The crank pin 21 of the crankshaft 20 is inserted into a boss portion 25 protruding from the back surface of the end plate 13 of the orbiting scroll member 15'.

30 is a moving space in which the end plate 13 of the orbiting scroll member 15
The outer peripheral moving wall 301 and the inner wall 1 of the fixed scroll member 19
91 and the frame 18. 35t-
is an oil suction passage that is provided to penetrate the fixed wall of the frame 18 forming the moving space 30, and has one end opened into the oil 34 and the other end opened into the moving space 30.

Reference numeral 36 denotes an oil supply passage, which passes through the mirror plate 13 and communicates with the oil passage 37 and oil holes 39, 40, and 41, which open to the moving space 30 at one end and communicate with the bearing portion through the space 211. There is.

Reference numeral 361 denotes an oil supply hole for the sliding surface 38 between the inner wall 191 of the fixed scroll member 19 and the end plate 13 of the orbiting scroll member 15.

Reference numeral 26 denotes a refrigerant gas suction passage, which is fixed to the flat part 52 of the cover 51 by welding. 29 refrigerant gas discharge passages are welded and fixed through the flat part 53 of the closed container 10, and the tip of the refrigerant gas discharge passage 29 is a discharge hole 27 provided through the end plate 16 of the fixed scroll member 19.
The connection is fixed in communication. 261 refrigerant gas inlet. With 50 motor terminals, the flat part 52 of the cover 51
It is fixedly installed.

Next, its effect will be explained.

Due to 200 rotations of the crankshaft driven by the electric WJ machine section 12, the boss section 25 rotates within the medium pressure space chamber 24 of the frame 18, causing the orbiting scroll member 15 to perform an orbiting motion, and the rotation wrap 14 and the fixed wrap 17 Due to the movement of the formed compression chamber 111, the gas sucked into the refrigerant gas suction passage 26 is compressed from the spiral-shaped outer compression chamber to the inner compression chamber, and the gas is compressed from the spiral-shaped outer compression chamber to the inner compression chamber. The refrigerant gas is discharged from the outlet hole 27 to the outside of the machine via a refrigerant gas discharge passage 29 that penetrates the inside of the closed container 10 . That is,
The volume of the compression chamber formed by the lap portion 14.17 of the orbiting scroll member 15 and the fixed scroll member 190 and the end plate 13.16 decreases and the pressure increases as it moves from the outside to the center. Therefore, the orbiting scroll member 15
As described above, the intermediate pressure space chamber 24 formed by the frame 18 is maintained at a pressure intermediate between the suction pressure and the discharge pressure by the communication hole 23. Therefore, due to the pressure difference between this intermediate pressure and the pressure inside the compression section, the orbiting scroll member 15 is pressed against the fixed scroll member 19Vc, and both wrap sections 14.17
The seal portion in the gap between the tip of the end plate 16.13 and the end plate 16.13 is maintained in close contact.

FIGS. 2a to 2d show the movement of the moving part 30 that moves due to the orbiting movement of the orbiting scroll member 15. FIGS. FIG. 2a shows a case where the closest position between the fixed wall 181 of the frame 18 forming the moving space 30 and the outer circumferential moving wall 301 of the orbiting scroll member 15 is point A, and the moving space 30 is filled. The oil flows down into the oil supply passage 36 from the upper part, and the oil has been completely supplied to the oil passage 37. At the same time, from the oil suction passage 35,
Oil is sucked into the moving space 30 from above. Figure 2b shows A
This shows the situation when the point reaches the top, and shows the state where the moving space 30 has moved further to the left in the figure. FIG. 2C shows the movement space 30 due to the movement of point A.
The oil supply passage 36 is electrically connected and oil supply is started. 2nd d
The figure further shows the state when point A reaches the lowest point. In this state, the oil suction passage 35 is completely blocked, but oil has flowed down into the oil supply passage 36, and the oil supply passage 35 is completely blocked. It is carried out.

As shown in FIGS. 2a to 2d above, during the orbiting movement of the orbiting scroll member 15, the moving space 30 is always filled with oil, and point A is the opening of the oil supply passage 36. Refueling will not be performed if the

Further, the oil supply passage 36Y'i may be provided in an oblique direction as shown in FIG. Alternatively, as shown in FIG. 4, it may be provided on the bottom surface of the frame 18. This ensures intermittent refueling.

5 and 6 show another embodiment of the invention, in which vanes 32 are provided to more reliably supply oil to the bearing. The rear end of the vane 32 is inserted into and out of a groove 182 provided in the frame 18 via a spring 33, and the tip is constantly pressed by the spring 33 and comes into contact with the outer peripheral wall 301 of the end plate of the orbiting scroll member 15. are doing. The vane 32 is provided between the oil suction passage 35 and the oil supply passage 363, near both the oil suction passage 35 and the oil supply passage 363.

In this case as well, the movement space 30 moves due to the movement of point A, and oil is supplied from the oil supply passage 363 to the bearing part.
32, it is divided into a moving space 303 that sucks in oil and a moving space 304 that pushes oil into the oil supply passage 363, so that the oiling action is not forced and the oiling is reliably performed.

The positional relationship between the oil supply passage 363 and the vane 32 is shown in FIGS. 63 to 6d.

An arbitrary point B on the surface of the outer circumferential wall 301 of the mirror plate 13 of the orbiting scroll member 15 draws a trajectory B1 as shown within the dotted line due to the orbiting movement. Therefore, the opening of the oil supply passage 363 also rotates in the same manner as this trajectory B1, and the positional relationship with the vane 32 at the fixed position changes. In the case of FIG. 6a, the width near the opening of the oil supply passage 363 in the movement space 304 is widening, and oil is still being sucked in, and the oil in the movement space 304 is pushed into the oil supply passage 363. Not yet. In FIG. 6b, the width between the movable wall 301 and the fixed wall 183 of the frame 18 is at its maximum when suction is completed. 6th
FIG. C shows a state in which the oil in the moving space 304 is pushed into the oil supply passage 363, and at this time, oil is sucked into the moving space 303 through the oil suction passage 35. FIG. 6d shows a state in which the oil has been completely pushed in.

7a to 7b show another embodiment using vanes, and by adding another vane 321, the amount of oil supplied can be limited to an appropriate amount. That is, by providing the second vane 321 at a position at an angle of approximately 90 degrees from the first vane 32 provided near the oil suction passage 35 and providing the oil supply passage 364 in the vicinity, the inside of the moving space 130 is Only oil is pushed into the oil supply passage 364.

Therefore, the amount of oil supplied to the bearing portion is limited in proportion to the volume of the moving space 130. From these, it can be seen that the position of the second vane 321 can be freely selected in order to obtain the necessary and appropriate amount of oil supply. Figures 7b and 7C show the oil suction state, and Figure 7d shows the state when pushing has been completed.

Figures 8a and 8b show another embodiment of the vane, in which a groove 324 is provided in the vane 323, and the groove 324 and the oil suction passage 351 are provided intermittently in communication.

According to this, oil is sucked in only during the timing when the passages are in communication, and when the volume of the moving space 130 reaches the maximum and the opening of the oil suction passage 351 is blocked by the vane 323vC, backflow of oil is prevented. It can be prevented.

As can be understood from FIG. 8b, the width of the vane 323 is equal to the thickness of the end plate 13 of the orbiting scroll member 15.

9 and 10 show examples in which the oil supply passage 362 penetrates the frame 18. In this case, the sliding bearing 44 is directly supplied with oil, and the oil is supplied from the oil hole 40 through the oil passage 37 to the other oil hole 4.
Supply to 1.39.

Further, FIG. 11 shows another embodiment regarding the oil suction passage, and in the case where the oil level 341 is low,
52 to the oil suction passage 35, oil can be suctioned without any trouble.

Also, as shown in FIG. 12, the oil level 341 is high in the oil suction passage 3.
In the case where oil is transferred from the upper opening of No. 5 and naturally infiltrates into the nitrogen gap 131, sufficient oil supply can be achieved even if the vane 321 is provided only near the oil supply passage 364 side.

FIGS. 13 to 15 show still other embodiments relating to vane attachment, and FIG. 13 shows vane 32.32.
1 are both inserted into a groove 182 on the orbiting scroll member 15 side via a spring 33.

Alternatively, as shown in FIGS. 14 and 15, one vane may be inserted into the orbiting scroll member and the other vane may be installed into the frame.

Figures +6a to 16c show oil relief grooves 60 formed in the wall of the frame 18 that forms the movement space 30 other than the space in which the pump action is performed by the two vanes, in order to reduce the compression resistance in the movement space 30. Here is an example. According to this,
Oil in the moving space 30 that does not perform pumping is removed from the oil relief groove 60.
Since the oil flows through the medium pressure space chamber 24, the increase in power due to the compression action of the oil is reduced.

FIG. 17 shows an oil passage 140.1 in the wrap 14 of the orbiting scroll member 15 so that part of the oil to be supplied is sent to the wrap surface by a vane pump action to improve sealing performance.
An example in which 41 is provided is shown below.

FIG. 18 shows an embodiment of a scroll compressor in which the compressor section 11 is arranged at the bottom and the electric motor section 12 is arranged at the top.

It is connected to an oil passage 551 provided through the fixed scroll member 19 through a 55-piece oil lifting pipe. Oil accumulated at the bottom 3
4 is sucked up through the oil lifting pipe 55.

FIG. 19 shows an embodiment of a scroll compressor in which the compressor section 11 is arranged in the upper part and the electric motor part 12 is arranged in the lower part. 56 is an oil lifting pipe, and an oil passage 185Vc passes through the frame 184.
It is connected and the tip is immersed in oil.

〔Effect of the invention〕

According to the present invention, since reliable refueling can be performed,
It is possible to improve the seizure resistance and wear resistance of the bearing.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a horizontal scroll compressor, Fig. 2 is a side view explaining the moving space and the oil supply situation, Figs. FIG. 6 is a partial cross-sectional view of the positional relationship between the vane and the oil supply passage, FIG. 7 is a side view explaining another embodiment, and FIG.
The figure is a partial cross-sectional view of the vane part, Figure 9 is a side view of the oil supply passage provided on the frame surface, Figure 18 is a cross-sectional view of Figure 9,
Figures 1 to 15 are side views showing the positional relationship of the vanes;
Figure 6 is a side view and cross-sectional view showing the groove position, Figure 17 is a cross-sectional view showing the oil supply system to the wrap, Figure 18 is a cross-sectional view of a vertical scroll compressor with the compressor section located at the bottom, FIG. 19 is a sectional view of a vertical scroll compressor in which a compressor section is disposed at the top. 10... Airtight container 11... Compressor section 12.
...Electric motor part 13...Orbiting scroll member end plate 1
4... Wrap 15... Orbiting scroll member 16
... End plate +7 ... Wrap 18 ... Frame 19 ... Fixed scroll member 20 ... Crankshaft 21 ... Crank bin 23 ... Communication hole 24 ... Medium pressure space chamber 25 ...・Boss part 27・
...Discharge hole 30...Movement space 32...Vane 33...Spring 35...Oil suction passage 3
6... Oil supply passage 37... Oil passage 39.40
．． 41... Oil hole 55... Oil lifting pipe.枳 - Aiming field grass 3 group pu〉 Mo 4ffi Han A snake Bu 7 Shiban 6th peek Kanashi ¥ 11 Koshiro 12 Box rod raB 3 Baba 19 m 2 To amendment content procedure amendment (method) % formula % amendment Relationship with patent application Person name
(5101 Tsuji Hitachi Co., Ltd. Manufacturing Director Office Person Residence Address: 1 (1) Hitachi, Ltd., 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo i-11!Kyo 212-11
11 (Main representative) Contents of correction As shown in the attached sheet, Yana ``1 σ之(b Ii・. 9)...The bow in Figure 9 is changed to ``Figure 10 is in Figure 9...''
・” I corrected it.

Claims (10)

[Claims] 1. Equipped with a fixed scroll member and an orbiting scroll member with a spiral wrap standing upright on the end plate and fixed to the frame,
Both scroll members are engaged with each other inside, and the orbiting scroll is rotated so that it does not apparently rotate, and the scroll fluid is designed to supply oil from an oil reservoir provided at the bottom of the container to the bearings and each sliding part. In the machine, a moving space is formed by the outer circumferential wall of the end plate of the orbiting scroll member and the inner wall of the fixed scroll member or the fixed wall of the frame, and an oil suction passage having one end opened into oil and the other end opened into the moving space. A scroll fluid machine characterized in that a wall forming the moving space is provided with an oil supply passage that penetrates the fixed wall, opens at one end to the moving space, and communicates with the bearing section at the other end. 2. The scroll fluid machine according to claim 1, wherein the wall is an outer circumferential wall of a flexible plate of an orbiting scroll member. 3. The scroll fluid machine according to claim 1, wherein the wall is an inner wall of the frame. 4. A scroll fluid machine comprising a fixed scroll member and an orbiting scroll member in which a spiral wrap is upright on an end plate, the scroll members are engaged with each other inwardly, and the orbiting scroll performs an orbiting motion so that the orbiting scroll does not apparently rotate. A moving space is formed by the outer circumferential wall of the mirror plate of the scroll member and the inner wall of the fixed scroll member or the fixed wall of the frame, and an oil suction passage having one end opened in oil and the other end opened into the moving space penetrates the fixed wall. A refueling passage having one end open to the moving space and the other end communicating with the bearing portion is provided through a wall forming the moving space, and a tip thereof is always connected to one wall forming the moving space. A scroll fluid machine characterized in that the contact is also provided with a vane whose rear end is inserted via a spring into a groove provided in the other wall. 5. Claim 4: One vane is provided between the oil suction passage opening and the oil supply passage opening on a fixed wall near both openings.
Scroll fluid machine as described in section. 6. Claim 4: One vane is provided on the fixed wall near each of the oil suction passage opening and the oil supply passage opening.
Scroll fluid machine as described in section. 7. 7. The scroll fluid machine according to claim 6, wherein the oil suction passage opening and the oil supply passage opening are located within approximately 90 degrees with respect to the centers of both scrolls. 8. 5. The scroll fluid machine according to claim 4, wherein an oil lifting pipe is connected to the oil suction passage. 9. 5. The scroll fluid machine according to claim 4, wherein one vane is provided on the outer circumferential wall of the orbiting scroll end plate near each of the oil suction passage opening and the oil supply passage opening. 10. 5. The scroll fluid machine according to claim 4, wherein one vane is provided on the fixed wall near each of the oil suction passage opening and the oil supply passage opening and on the outer circumferential wall of the orbiting scroll head plate.