JPH051681A - Scroll compressor - Google Patents

Abstract

PURPOSE:To provide a scroll compressor which requires necessary but minimum processing in manufacture with no cost adversely affected, insures the sufficient and proper quantity of oil supply to a compression space, and concurrently enhance reliability with the leakage of gas prevented out of the compression space. CONSTITUTION:Auxiliary oil supply recessed sections 3Oa and 3Ob are provided for the back face side of the end plate 13 of a turning scroll blade 9, lubricant in an oil sump 19 formed within the inner bottom section of a hermetic case 1, is housed in while being exposed to the inner circumferential side of a thrust ring 10 accompanied by the turning motion of the turning scroll blade. Furthermore, when the turning scroll blade is turned, lubricant which has been exposed to the outer circumferential side so as to have been housed in the auxiliary oil supply recessed sections, is not dissipated around the circumference before the auxiliary oil supply recessed sections is closed by the slide-contacting end face of the thrust ring, and lubricant is intermittently supplied to a compression chamber S which is a compression space formed by the stationary and turning scroll blades, out of the circumferential end sections of the stationary scroll blade 8 and tuning scroll blade.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor used as a compressor constituting a refrigerating cycle of an air conditioner, for example.

[0002]

2. Description of the Related Art For example, a compressor constituting a refrigeration cycle of an air conditioner has extremely low motion noise as compared with an ordinary rotary compressor, and a suction valve and a discharge valve are not required and the number of parts is small. There is a tendency for scroll-type compressors that are small in number and have good compression performance to be used frequently.

This scroll compressor is shown, for example, in FIG.
It is configured as shown in. That is, in the figure, reference numeral 1 denotes a closed case, a support frame 2 is provided in the closed case 1, and a rotary shaft 3 is rotatably supported. A scroll compression mechanism section 4 to be described later is provided below the rotary shaft 3, and an electric motor section 7 including a stator 5 and a rotor 6 is provided above.

The scroll compression mechanism section 4 has a fixed scroll blade 8 mounted and fixed to the support frame 2, an orbiting scroll blade 9 pivotally supported by an eccentric portion 3a at the lower end of the rotary shaft 3, and the orbiting scroll blade 9. Thrust ring 10 that receives a load in the thrust direction of the
It consists of 1.

Both the fixed scroll vane 8 and the orbiting scroll vane 9 have end plates 12 and 13 and the end plate 1.
Spiral blades 14 and 15 provided integrally with the blades 2 and 13
Composed of and. The wing portions 14 and 15 are meshed with each other, and a compression chamber S that is a compression space surrounded by the end plate portions 12 and 13 is formed.

A suction pipe 16 communicating with an evaporator (not shown) penetrates through the side of the closed case 1. The open end of the suction pipe 16 penetrates the side of the fixed scroll vane 8 and the outer periphery of the compression chamber S. Facing the side.

A high pressure discharge passage 17 is provided from the central portion of the swirl scroll blade 9 along the axis of the rotary shaft 3.
The high-pressure discharge passage 17 is opened at the upper end surface of the rotary shaft 3 and communicates with the discharge pipe 18 connected to the upper end of the closed case 1 through the inside of the closed case 1. This discharge pipe 18 is
It communicates with a condenser (not shown).

On the other hand, an oil reservoir 19 for collecting lubricating oil is formed on the inner bottom of the closed case 1, and an oil supply passage 20 provided on the fixed scroll blade 8 and the rotary shaft 3 is formed.
Communicate with. This oil supply passage 20 is provided with the thrust ring 1 described above.
0 or the sliding contact surface with the orbiting scroll blade end plate portion 13 of the Oldham mechanism 11 communicates with the sliding contact surface of the fixed scroll blade end face plate portion 12 from the outer peripheral end of the orbiting scroll blade end plate portion 13.

An oil supply mechanism 21 is provided in the rotary shaft eccentric portion 3a, which is a midway portion of the oil supply passage 20, and the lubricating oil in the oil sump portion 19 is forcibly forced with the rotation of the rotary shaft 3. It is designed to be guided along.

In the scroll type compressor thus constructed, the electric motor section 7 is energized to drive the scroll compression mechanism section 4, and the low pressure refrigerant gas as the compressed gas is introduced from the suction pipe 16. Then, it is sucked to the outer peripheral side of the compression chamber S, which is the compression space between the fixed scroll blade 8 and the orbiting scroll blade 9.

The refrigerant gas sucked into the compression chamber S is compressed as the orbiting scroll blade 9 orbits.
When the pressure rises to a predetermined pressure, it is discharged into the high pressure discharge passage 17, and further discharged from the upper end opening of the rotary shaft 3 into the closed case 1 to be filled. This high-pressure refrigerant gas is discharged from the discharge pipe 18
Through an external condenser.

The oil supply mechanism 21 forcibly introduces the lubricating oil of the oil sump portion 19 into the oil supply passage 20 as the rotary shaft 3 rotates, and further supplies oil to each sliding portion of the compression mechanism portion 4.
The electric motor section 7 is controlled to an optimum operating frequency according to the load, and air conditioning is performed under optimum conditions.

[0013]

By the way, the oil supply mechanism 21 supplies the lubricating oil of the oil reservoir 19 to the fixed scroll blade 8
And the compression chamber S, which is the compression space between the orbiting scroll blade 9 and
In order to guide the oil to the upper surface, the lubricating oil on the sliding contact surface between the thrust ring 10 and the orbiting scroll blade end plate portion 13 should be removed.
Disperse to the surroundings by the centrifugal force that accompanies the swirling motion of.

Further, the compression chamber S is guided through the sliding contact surface between the Oldham mechanism 11 and the orbiting scroll blade end plate portion 13 to the peripheral end of the end plate portion 13 and through the sliding contact surface between the fixed scroll end plate portion 12. Will be refueled. Therefore, in the above configuration, the efficiency of oil supply to the compression chamber S side of the oil supply mechanism 21 is poor and there is a risk of a seizure accident due to insufficient oil. Therefore, means for preventing such a problem is adopted.

For example, a vertical hole is provided through the end plate portion 12 of the fixed scroll vane 8 to directly communicate the lubricating oil in the oil sump portion 19 with the compression chamber S. Since the lubricating oil is guided directly from the oil sump 19 to the compression chamber S, it is possible to secure a sufficient amount of oil supply to each sliding contact surface of the compression chamber S.

The problem here is the diameter of the vertical hole. That is, if the diameter is too large (for example, about φ1 to 2 mm), the refrigerant gas during compression in the compression chamber S easily leaks to the oil sump 19 and an excessive amount of lubrication occurs. Oil is refueled, resulting in a reduction in compression efficiency.

A vertical hole with an extremely small diameter (about 0.3 mm in diameter) is effective for preventing gas leakage during compression and maintaining an appropriate amount of oil supply, but this time, dust contained in the lubricating oil is used. It becomes easier to clog, etc., and there is no point in providing a vertical hole.

The vertical hole itself has a somewhat large diameter, and by connecting a capillary tube here,
It is possible to prevent gas leakage and regulate the amount of refueling,
On the other hand, the number of parts increases and the cost is adversely affected.

The present invention has been made by paying attention to the above circumstances, and an object of the present invention is to perform compression without adversely affecting cost without requiring new parts with a minimum required minimum processing. An object of the present invention is to provide a scroll compressor that secures an appropriate amount of oil supply to the space and reliably prevents gas leakage from the compression space due to oil supply to improve reliability.

[0020]

In order to satisfy the above object, a first aspect of the invention is to form an oil reservoir for lubricating oil in an inner bottom portion of a hermetically sealed case, and in the hermetically sealed case, an end plate portion and the end plate. A fixed scroll blade consisting of a spiral blade portion projecting integrally with the blade portion, and a spiral blade portion that meshes with the blade portion of the fixed scroll blade, and is provided integrally with this blade portion and compressed by these. An orbiting scroll blade composed of an end plate portion that forms a space is provided for orbital movement, and a thrust ring is slidably provided on the back side of the end plate portion of the orbiting scroll blade to receive the load in the thrust direction of the orbiting scroll blade and to perform the above-mentioned turning. Exposed to the inner peripheral side of the thrust ring with the orbiting motion of the orbiting scroll blade on the back side of the scroll blade end plate,
The scroll compressor is characterized in that an auxiliary oil supply concave portion is provided which is closed by a sliding contact end surface of the thrust ring and is exposed on an outer peripheral side of the thrust ring.

Therefore, with the orbiting movement of the orbiting scroll blade, the auxiliary oil supply recess is exposed on the inner peripheral side of the thrust ring to accommodate the lubricating oil in the oil sump, and is closed by the sliding contact end surface of the thrust ring. After being formed, the lubricating oil that is exposed and stored on the outer peripheral side of the thrust ring is diffused to the surroundings, and is supplied to the compression space through the peripheral end portions of the fixed scroll blade and the orbiting scroll blade. A sufficient amount of oil can be supplied without causing gas leakage from this compression space and at the same time not causing excess gas.

A second aspect of the invention is to form an oil reservoir for lubricating oil in an inner bottom portion of a hermetically sealed case, and in the hermetically sealed case, an end plate portion and a spiral blade integrally projecting from the end plate portion. A fixed scroll vane that is fixed to the fixed scroll vane, and a spiral scroll vane that meshes with the vane part of the fixed scroll vane and an end plate part that is integrally provided with this vane part and forms a compression space An auxiliary oil supply hole penetrating the end plate portion of the orbiting scroll blade is provided so as to freely rotate, and communicates with the compression space.The auxiliary oil supply hole is opened and closed by the sliding contact end face of the thrust ring with the orbiting motion of the orbiting scroll blade. It is a scroll type compressor characterized in that

Therefore, the auxiliary oil supply hole is opened / closed by the sliding contact end face of the thrust ring with the orbiting movement of the orbiting scroll blade, and when this is opened, the lubricating oil in the oil reservoir is directly connected to the fixed scroll blade and the orbiting scroll blade. Guide the injection into the compression space. Lubricating oil is injected into the compression space intermittently, and a sufficient amount of oil is supplied to the extent that gas leakage does not occur from this compression space and is not excessive.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Except for the structure described later, the main structure of the scroll compressor is the same as that described above with reference to FIG. Therefore, new description is omitted.

As shown in FIG. 1, the thrust ring 10 is in sliding contact with the rear side of the end plate portion 13 of the orbiting scroll blade 9. In the space between the inner peripheral side of the thrust ring 10 and the peripheral surface of the rotary shaft eccentric portion 3a and the peripheral surface of the orbiting scroll blade boss 13a, high-pressure lubricating oil introduced along with the operation of the oil supply mechanism 21 is temporarily stored. The high-pressure lubricating oil receives a load in the thrust direction of the orbiting scroll blade 9. In other words, the thrust ring 10 regulates the area of high pressure applied to the orbiting scroll blade 9 by setting its inner diameter dimension.

As shown in FIGS. 1 and 2, a new position is provided at a predetermined position on the rear side of the end plate portion 13 of the orbiting scroll blade 9.
A plurality of auxiliary oil supply recesses 30a and 30b are provided. Here, a pair of the auxiliary oil supply recesses 30a and 30b are provided near the Oldham grooves 11a and 11b with which the Oldham mechanism 11 engages.

The auxiliary oil supply recesses 30a and 30b will be further described. When the orbiting scroll blade 9 makes an orbiting motion, the auxiliary oiling recesses 30a and 30b are exposed to the inner peripheral side of the thrust ring 10 depending on the orbiting position, or the sliding contact end surface The position and the diameter of the thrust ring 10 exposed on the outer peripheral side are set.

It is not necessary that the auxiliary oiling recesses 30a and 30b are exposed to the inner and outer peripheral sides of the thrust ring 10, and it is sufficient that at least a part of the auxiliary oiling recesses 30a and 30b is exposed in accordance with the required oiling amount. .

However, when the slide contact end surface of the thrust ring 10 is closed, the entire surface must be closed. That is, a state in which the auxiliary oil supply recesses 30a and 30b are simultaneously exposed on the inner peripheral side and the outer peripheral side of the thrust ring 10 is avoided.

The auxiliary oil supply recesses 30a and 30b are also provided.
Can be provided only by drilling, for example, and is extremely easy work. Optimum values can be set for the diameter dimension, depth, number, etc., from the required oil supply efficiency.

A compression action is performed with the rotation of the rotary shaft 3, and the lubrication mechanism 21 operates to forcibly guide the lubricating oil in the oil sump 19 to the lubrication passage 20.
Further, lubricate each sliding part.

Due to the structure of the scroll compression mechanism 4, in the oil supply passage 20, the lubricating oil is distributed in the space between the inner peripheral surface of the thrust ring 10, the peripheral surface of the rotating shaft eccentric portion 3a and the peripheral surface of the orbiting scroll blade boss 13a. It collects once.

Since the lubricating oil collected here has been increased in pressure by receiving the operating pressure of the oil supply mechanism 21, it easily penetrates between the rear surface of the orbiting scroll blade end plate portion 13 and the sliding contact end surface of the thrust ring 10 to mutually Guarantees smooth sliding.

The lubricating oil coming out from the sliding contact surface is used as the end plate portion 13.
To the sliding contact surface with the fixed scroll blade end plate portion 12 via the Oldham mechanism 11 or directly via the outer end of the end plate portion 13.

When the orbiting scroll blade 9 orbits, the auxiliary oiling recesses 30a, 30b provided on the rear side of the end plate portion 13 are exposed from the inner peripheral side of the thrust ring 10 when the inner peripheral side is exposed. The lubricating oil accumulated in is introduced.

Further, when the orbiting scroll blade 9 makes an orbiting motion, the auxiliary oil supply recesses 30a and 30b are closed by the sliding contact end surface of the thrust ring 10 while containing the lubricating oil,
Then, it is exposed from the outer peripheral side. At this time, the contained lubricating oil receives centrifugal force and is diffused to the surroundings.

Specifically, the change shown in FIG. 3 is made. Here, the auxiliary oil supply concave portion 30a on the upper side in the drawing
Is called a first recess, and the auxiliary oil supply recess 30b on the lower side is referred to as
Is called a second recess.

First, in the upper left state in the figure, the first
Since at least a part of the concave portion 30a of the above is exposed to the inner peripheral side of the thrust ring 10, the high-pressure lubricating oil accumulated therein is introduced. Further, since at least a part of the second recess 30b is exposed to the outer peripheral side of the thrust ring 10, the lubricating oil contained therein is diffused to the surroundings.

In the following, description will be given along the large arrow in the figure. When the orbiting scroll blade 9 further turns 90 °, the first recess 30a accommodates the lubricating oil and the thrust ring 10 is retained.
Is closed at the sliding contact end surface, and the second concave portion 30b is closed at the sliding contact end surface while being empty.

When the orbiting scroll blade 9 further turns 90 °, at least a part of the first concave portion 30a is exposed on the outer peripheral side of the thrust ring 10 and diffuses the lubricating oil contained therein to the surroundings. At least a part of the second recess 30b is exposed to the inner peripheral side of the thrust ring 10 to introduce the lubricating oil.

When the orbiting scroll blade 9 further turns 90 °, the first recess 30a remains empty and the thrust ring 10 is left.
Is closed at the sliding contact end surface thereof, and the second concave portion 30b is closed at the sliding contact end surface in the state of containing the lubricating oil. When the orbiting scroll blade 9 turns 90 degrees from here, the state described at the beginning is returned, and the above-described operation is repeated.

After all, the first concave portion 30a and the second concave portion 30
and b alternately contain the lubricating oil and intermittently dissipate to the surroundings. These recesses 30a and 30b perform the above-mentioned action once, respectively, while the orbiting scroll blade 9 orbits 360 °.

Then, as shown in FIG. 1 again, a part of the dispersed lubricating oil is guided to the peripheral end portion of the orbiting scroll blade end plate portion 13 via the Oldham mechanism 11 or directly.
From the sliding contact surface with the fixed scroll blade end plate portion 12, the compression chamber S
Is guided to the sliding contact part.

The positions of the auxiliary oil supply recesses 30a and 30b,
By appropriately setting the diameter dimension, the number, etc., it is possible to supply an optimum amount of lubricating oil to the compression chamber S so that the compression chamber S does not become excessive, thereby ensuring good lubricity. Moreover, the gas during compression does not leak from the compression chamber S, and the compression efficiency is not impaired.

The structure shown in FIG. 4 may be used. This is because a plurality of auxiliary oil supply holes 40a, 40 that penetrate the end plate portion 13 of the orbiting scroll blade 9 and communicate with the compression chamber S are provided.
b is provided. These auxiliary oil supply holes 40a and 40b are
A pair is provided in the vicinity of the Oldham grooves 11a and 11b.

When the orbiting scroll blade 9 makes an orbiting motion, the position where the orbiting scroll vane 9 is exposed on the inner peripheral side of the thrust ring 10 or is closed by this sliding contact end face is set according to this position.

The auxiliary oil supply holes 40a and 40b can be provided by drilling, for example, and the work is extremely easy. An optimum value can be set based on the required oil supply efficiency such as at least the diameter dimension and number that will not be clogged with dust contained in the lubricating oil.

Therefore, the inner peripheral surface of the thrust ring 10, the peripheral surface of the rotating shaft eccentric portion 3a, and the orbiting scroll blade boss portion 13 are formed.
The lubricating oil accumulated in the space with the a peripheral surface easily penetrates between the orbiting scroll blade end plate portion 13 and the sliding contact end surface of the thrust ring 10. The lubricating oil is introduced when the auxiliary oil supply holes 40a and 40b are exposed on the inner peripheral side of the thrust ring 10.

The lubricating oil guided through the auxiliary oil supply holes 40a and 40b is directly injected and guided into the compression chamber S which is the compression space between the fixed scroll blade 8 and the orbiting scroll blade 9, and lubricates the sliding contact portion. . At the time of injection, a sufficient amount can be secured without causing a gas leak from the compression chamber S and in addition, not causing an excessive amount.

Specifically, the change is as shown in FIG. Here, the auxiliary oil supply hole 40a on the upper side in the drawing
Is referred to as a first hole portion, and the auxiliary oil supply hole 40b on the lower side is
Called the second hole.

First, in the upper left state in the figure, the first
Since the hole 40a is exposed on the inner peripheral side of the thrust ring 10, the high-pressure lubricating oil accumulated therein is introduced and injected into the compression chamber S. Second hole 4
No. 0b is closed by the sliding contact end surface of the thrust ring 10, so that there is no conduction of lubricating oil.

In the following, the description will be given along the large arrow in the figure. In the next state in which the orbiting scroll blade 9 has rotated 90 °, the first hole 40a is closed by the sliding contact end face of the thrust ring 10, and the compression chamber is closed. Lubricant oil injection into S has already been completed. Second
The hole portion 40b is closed at the sliding contact end face.

When the orbiting scroll blade 9 further turns 90 °, the first hole portion 40a continues to be thrust ring 1
The second hole 40b is exposed to the inner peripheral side of the thrust ring 10 and the lubricating oil is injected and guided into the compression chamber S.

When the orbiting scroll blade 9 further turns 90 °, both the first hole portion 40a and the second hole portion 40b are closed by the sliding contact end face of the thrust ring 10, and the second hole portion 40b is closed. Lubrication oil injection has already ended. When the orbiting scroll blade turns 90 degrees from here, the state described at the beginning is returned, and the above-described operation is repeated.

After all, the first hole 40a and the second hole 40
and b alternately inject and guide the lubricating oil into the compression chamber S. These hole portions 40a and 40b have 36
The above action is performed once during the 0 ° turning motion.

Then, as shown in FIG. 4 again, the lubricating oil is intermittently introduced into the compression chamber S through the auxiliary oil supply holes 40a and 40b so as to secure a sufficient amount of oil supply to the sliding contact portion. . Then, the auxiliary oil supply holes 40a, 40b are very instantaneously opened, and moreover, the gas leakage from the compression chamber S is caused by the small holes whose diameter is such that dust and the like contained in the lubricating oil are not clogged. There is no.

The above-mentioned compressor is not necessarily limited to the one provided in the equipment constituting the refrigeration cycle, but can be used for compressing other gas to be compressed and does not exceed the scope of the present invention. Various modifications can be made within.

[0058]

As described above, according to the present invention, the auxiliary oil supply recess is provided on the rear side of the end plate of the orbiting scroll blade,
Along with the orbiting motion of the orbiting scroll blade, the lubricating oil is exposed by being exposed on the inner peripheral side of the thrust ring, closed by the sliding contact end surface of the thrust ring, and exposed on the outer peripheral side of the thrust ring and dissipated to the peripheral end side. From the above, or provided an auxiliary oiling hole that penetrates the end plate portion of the orbiting scroll blade and communicates with the compression space, and opens and closes with the sliding contact end face of the thrust ring with the orbiting movement of the orbiting scroll blade,
Since the lubricating oil is introduced and guided into the compression space when opened, a sufficient and appropriate amount of lubricating oil can be provided for each scroll with the minimum necessary minimum processing, without the need for new parts and adversely affecting the cost. It is possible to supply oil to the compression space of the blade, and reliably prevent oil running-out accidents at this sliding contact portion. In addition, it is possible to prevent gas from leaking from the compression space due to refueling and to improve reliability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a scroll compressor, showing an embodiment of the present invention.

FIG. 2A is a plan view of an orbiting scroll blade. (B) is a vertical cross-sectional view of the orbiting scroll blade.

FIG. 3 is a view for sequentially explaining the operation of the auxiliary oil supply recess.

FIG. 4 is a vertical cross-sectional view of a main part of a scroll compressor, showing another embodiment of the present invention.

FIG. 5 is a view for sequentially explaining the action of the auxiliary oil supply hole.

FIG. 6 is a vertical cross-sectional view of a scroll compressor of a conventional example.

[Explanation of symbols]

19 ... Oil sump, 1 ... Closed case, 12 ... End plate, 14
... Wing portion, 8 ... Fixed scroll blade, 15 ... Blade portion, 13 ... End plate portion, 9 ... Orbiting scroll blade, S ... Compression space (compression chamber), 10 ... Thrust ring, 30a, 30b ... Auxiliary oil supply recessed portion, 40a, 40b ... Auxiliary oil supply hole.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yutaka Sasahara             336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Corporation             Inside the Fuji factory

Claims (2)

[Claims] 1. A hermetically sealed case having an oil bottom portion for lubricating oil formed on an inner bottom portion, an end plate portion fixed in the hermetically closed case, and a spiral wing portion integrally projecting from the end plate portion. A fixed scroll blade, a spiral blade portion that meshes with the blade portion of the fixed scroll blade, and an end plate portion that is integrally provided with this blade portion and forms a compression space with these, and a swirling scroll blade that can freely swivel, A scroll-type compressor provided with a thrust ring of the orbiting scroll blade slidably provided on the back surface side of the orbiting scroll blade and receiving a load in the thrust direction of the orbiting scroll blade. It is exposed to the inner peripheral side of the thrust ring along with the orbiting motion of the scroll blades to accommodate the lubricating oil in the oil sump, and is closed by the sliding contact end surface of the thrust ring. From the outer peripheral side of the thrust ring to disperse the lubricating oil contained therein, and to provide auxiliary compression recesses for supplying oil to these compression spaces through the peripheral ends of the fixed scroll blade and the orbiting scroll blade. A scroll type compressor characterized in that. 2. A hermetically sealed case having an oil bottom portion for lubricating oil formed on an inner bottom portion, an end plate portion fixed in the hermetically closed case, and a spiral wing portion integrally projecting from the end plate portion. A fixed scroll blade, a spiral blade portion that meshes with the blade portion of the fixed scroll blade, and an end plate portion that is integrally provided with this blade portion and forms a compression space with these, and a swirling scroll blade that can freely swivel, A scroll type compressor provided with a thrust ring which is slidably provided on the rear side of the end plate portion of the orbiting scroll blade and receives a load in the thrust direction of the orbiting scroll blade. It is opened and closed by the sliding contact end face of the thrust ring with the orbiting movement of the orbiting scroll blade, and when it is opened, the lubricating oil in the oil sump portion is directly orbited with the fixed scroll blade. Scroll compressor characterized by comprising an auxiliary oil supply hole injecting guided into the compression space of the crawl wing.