JP2002221165A - Rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extremely high-reliable rotary compressor capable of eliminating the production of a abrasion powder by minimizing the abrasion of a discharge side guide support and securing stable operability of both guides, and having a lubricating method to a blade and sliding parts of the guides without producing a deposit in a blade movement space. SOLUTION: By using a center line extending in the projecting direction of a blade when a roller is positioned at an upper dead point or a lower dead point in a cylinder chamber as a base line, the blade movement space side end part of the discharge side guide support is exposed from the discharge side guide in a certain revolution angle range with the blade inclined on the discharge side with respect to the base line, and faced to the blade movement space, and lubricating oil is fed to the blade movement space side end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used in a refrigerating air conditioner or the like and having a piston in which a revolving roller and a blade are integrally provided.
In particular, the present invention relates to a countermeasure against wear of a discharge-side guide receiver provided in a cylinder.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a longitudinal sectional view of a conventional rotary compressor using a roller and a blade-integrated piston disclosed in Japanese Patent Application Publication No. 074.
As shown in the figure, in this compressor, an electric motor unit having a stator 110 and a rotor 120 at an upper part and a compression mechanism part at a lower part are arranged in a closed container 100. An oil reservoir 130 is provided for storing lubricating oil used for lubricating each sliding portion of the compression mechanism and for sealing a compression chamber described later.

FIG. 11 is a cross-sectional view of a compression mechanism of the conventional rotary compressor, and FIG. 12 is an enlarged view of a main part of FIG. The configuration of the compression mechanism will be described with reference to FIGS. The compression mechanism section shrink-fits and fixes the cylinder 4 having the cylinder chamber 41 with the suction port 42 opened and the rotor 120, rotatably supports the drive shaft 5 having the eccentric shaft section 51, and the drive shaft 5; A cylindrical roller 61 disposed in the cylinder chamber 41 with the frame 3 for closing the upper surface of the
Of the low-pressure chamber 14 which is provided integrally with the roller 61 and which communicates with the suction port 42 in the cylinder chamber 41.
0 and a blade 6, which is partitioned into a compression chamber 150 communicating with a discharge port (not shown) provided in the frame 3, and a piston 6, a curved surface portion 11, 21 and a flat surface for supporting the blade 62 slidably and swingably. Discharge-side guide 1 having substantially the same shape having surfaces 12 and 22
In addition, the suction side guide 2 and the drive shaft 5 are rotatably supported, and the drive shaft 5 is slid on the bottom surface of the eccentric shaft portion 51.
And a cylinder head 7 that axially supports the piston 6, the discharge-side guide 1, and the suction-side guide 2, and closes the lower surface of the cylinder chamber 41.

The cylinder 4 has a cylindrical hole through which the discharge-side guide 1 and the suction-side guide 2 penetrate in the axial direction, and a groove which penetrates in the axial direction and has the cylindrical hole opened at the other end and closed at one end. Is formed. The other end of the cylindrical hole communicates with the groove as described above, and on the side opposite to the groove by 180 °, communicates with the cylinder chamber 41, so that the cylindrical hole is divided into two opposing substantially arcuate sections. The two divided bow-shaped surfaces of the compression chamber 150 support the discharge-side guide 1 and guide the discharge-side guide 1 to swing.
The low-pressure chamber 140 supports the suction-side guide 2 and serves as a suction-side guide receiver 44 for guiding the swinging motion of the suction-side guide 2.

[0005] Inside the groove is a blade movement space 45 in which the outer peripheral end of the blade 62 reciprocates with swinging motion. Here, the cylinder 4 and the piston 6 are made of gray cast iron, and the discharge-side guide 1 and the suction-side guide 2 are made of high-speed tool steel and heat-treated.

Although not shown, a suction pipe (not shown) is attached to the side surface of the sealed container 100 so as to open into the sealed container 100, and the inside of the sealed container 100 has a low-pressure atmosphere that is a suction pressure. Since the blade movement space 45 is partially open in the closed container 100, the closed container 1
The low-pressure atmosphere is the same as that in 00.

Next, the operation will be described. The drive shaft 5 is rotated by the electric motor unit, and by this rotation, the roller 61 causes the radius centers of the curved surfaces 11 and 21 of the discharge-side guide 1 and the suction-side guide 2 (this corresponds to the discharge-side guide receiver 43 and the suction-side guide receiver 44). Around the axis of the drive shaft 5 along the inner wall of the cylinder chamber 41 while swinging about the swing center 46 of the discharge-side guide 1 and the suction-side guide 2 that coincide with the center of the radius. Orbiting. Inlet 4 for each revolution
2 sucks the refrigerant gas in the closed container 100 into the low-pressure chamber 140 while compressing the compression chamber 15 partitioned by the blades 62.
From 0, the compressed refrigerant gas is discharged from a discharge port provided in the frame 3 (not shown). The refrigerant gas discharged to the discharge port is passed through a discharge pipe (not shown) attached to the closed container 100 via a discharge pipe (not shown) which is separated from the low-pressure atmosphere in the closed container 100 and routed inside the closed container 100. It is discharged out of the closed container 100.

The roller 61 is located closest to the discharge side guide 1 and the suction side guide 2 in the cylinder chamber 41 called top dead center when the piston 6 revolves, that is, the outer peripheral end of the blade 62 is closest to the outer peripheral side of the cylinder 4. When the rotation angle is 0 °, the roller 61 is located farthest from the discharge-side guide 1 and the suction-side guide 2 in the cylinder chamber 41 called the bottom dead center.
The state where the outer peripheral end of is located closest to the inner peripheral side of the cylinder 4 is
At the bottom dead center, the volumes of the low-pressure chamber 140 and the compression chamber 150 are equal to each other.

Here, the blade movement space 45 is the closed vessel 1
Since it is directly or indirectly communicated with the inside of 00, it has a low pressure equal to the suction pressure. Therefore, a differential pressure between the high pressure of the compression chamber 150 and the low pressure of the blade movement space 45 acts on the discharge side guide 1. FIG. 13 is an explanatory diagram of the balance of the force of the ejection side guide 1. Discharge side guide receiver 4
3, between the side surfaces of the suction-side guide receiver 44 and the discharge-side guide 1, the suction-side guide 2, and the blade 62, a total of four
A minute side clearance of about 30 μm is formed, but the pressure difference between the compression chamber 150, the blade movement space 45, and the low-pressure chamber 140 tends to push the discharge-side guide 1, the suction-side guide 2, and the piston 6 to the low-pressure side. Therefore, at the time of operation, the side surface clearance is formed only between the side surfaces of the discharge side guide receiver 43 and the discharge side guide 1.
In this state, the discharge side guide 1 is moved to the blade movement space 4.
It moves in five directions due to the pushing force Fp generated by the differential pressure between the compression chamber 150 and the blade movement space 45,
By supporting the force Fp due to the differential pressure by the reaction force Fd from the ejection-side guide receiver 43 and the reaction force Fb from the side surface of the blade 62, the ejection-side guide 1 is maintained in a static and dynamic balance.

Here, the balance of the force of the ejection side guide 1 will be described in detail with reference to FIG. The flat surface 12 of the discharge-side guide 1 and the side surface of the blade 62 are in close contact with each other due to the differential pressure. In this portion, the high pressure in the compression chamber 150 and the low pressure in the blade movement space 45 are sealed. Therefore, a triangular distribution pressure is applied to the flat surface 12 to reduce the pressure linearly from the high pressure side to the low pressure side. High pressure may be applied to the portion, and low pressure may be applied to the remaining half of the blade movement space 45 side.

In operation, as described above, a side surface clearance is formed only between the side surfaces of the discharge side guide receiver 43 and the discharge side guide 1 by the differential pressure.
3 and the side surface of the discharge side guide 1, the compression chamber 150 extends from the compression chamber 150 to the point of application of the reaction force Fd of the discharge side guide receiver 43.
High pressure is working. Reaction force Fd of discharge side guide receiver 43
At the point of action, the discharge-side guide 1 and the discharge-side guide receiver 43 come into contact with force, and at the contact point, the side clearance of the discharge-side guide receiver 43 and the discharge-side guide 1 is sealed. If the side clearance is as small as 15 μm or less, the pressure may be reduced somewhat between the discharge side guide receiver 43 and the side surface clearance of the discharge side guide 1.

Therefore, the high pressure of the compression chamber 150 acting on the discharge side guide 1 as described above, when the upper and lower end surfaces are ignored, the curved surface from the compression chamber 150 to the contact point with the discharge side guide receiver 43 which is the sealing point as described above. The compression chamber acts on the portion 11, the half of the flat surface 12 on the compression chamber 150 side, and the end face on the cylinder chamber 41 side directly facing the compression chamber 150, and thus acts on the discharge side guide 1. The force Fp due to the high pressure of 150 and the pressure difference between the blade movement space 45 is a value obtained by multiplying the cross-sectional area in the range indicated by the line connecting the end points of both sides where the high pressure acts on the discharge side guide 1 by the differential pressure. , And acts in the direction of the blade movement space 45 that is perpendicular to the line segment. The above-mentioned end points on both sides are a center line extending in the axial direction of the flat surface 12 of the discharge-side guide 1 on the side of the blade 62 on the side of the ejection-side guide receiver 43 on which the guide reaction force Fd is applied.

The force Fp due to this differential pressure is applied to the discharge side guide receiver 4.
3 and the reaction force Fb from the side surface of the blade 62, the guide reaction force Fd is equal to the differential pressure, ie, Fd.
Since it acts at the contact point with the discharge side guide 1 pressed to the blade movement space 45 side by p, the point of action is the blade movement space side end 47 of the discharge side guide receiver 43, and the direction is oscillating. Center 46, ie, discharge side guide receiver 4
3 toward the center. Also, the blade reaction force Fb
Acts in a direction perpendicular to the side surface of the blade 62, and its action point is a position where the dynamic balance of the ejection side guide 1 is stabilized.

The center line extending in the projecting direction of the blade 62 located at the above-mentioned top dead center or bottom dead center is defined as a base line, and the base line is aligned with the blade 6 at each revolution angle.
2 is defined as the swing angle Ψ, the pressure of the compression chamber 150 and the swing angle of the blade 62 change for each revolution angle, so that the guide reaction force Fd and the blade reaction force Fb
Varies for each revolution angle. Under normal operating conditions for air conditioning or refrigeration, neither will have the same revolution angle,
The revolution angle at which the pressure in the compression chamber 150 reaches the discharge pressure, the revolution angle at which the guide reaction force Fd is maximized, and the blade 62
The revolving angle at which the swing angle becomes maximum on the suction port 42 side is approximately 2
It is around 70 °. FIG. 13 shows the revolving angle 270
It shows the state near °.

Next, the blade 62 and the discharge side guide 1,
FIG. 14 shows the lubrication of the sliding portion of the suction side guide 2.
This will be described below. FIG. 14 is JP-A-2000-179472.
This is a rotary compressor using a conventional roller and blade-integrated piston described in Japanese Patent Application Laid-Open Publication No. H11-209,878. The lubricating oil in the oil reservoir 130 is pumped up along the wall surface of an oil supply passage 52 extending in the drive shaft 5 in the axial direction by the action of a centrifugal pump, and a lateral hole or a drive connecting the outer peripheral surface of the drive shaft 5 and the oil supply passage 52 (not shown). A part of the sliding portion between the frame 3 and the drive shaft 5 is lubricated by a spiral groove or the like provided on the outer peripheral surface of the shaft 5 and then released from the upper end 31 of the frame 3 and transmitted as it is through the outer wall of the frame 3 or It hits the coil 111 of the stator 110 and is dropped on the upper end face 32 of the flange of the frame 3. The dropped lubricating oil falls into an oil recovery groove 33 formed in a circular shape on the outer periphery of the flange portion of the frame 3, and penetrates axially through the frame 3 which enables communication between the oil recovery groove 33 and the blade movement space 45. The fluid is dropped into the blade movement space 45 through a counterbore 35 provided to reduce the sliding loss of the communication path 34 and the upper surface of the blade 62.

Since the lower side of the blade movement space 45 is closed by the cylinder head 7, the blade movement space 4
5 stores the lubricating oil dropped in this space. The blade 62 and the discharge-side guide 1 and the suction-side guide 2 are partially exposed to the stored lubricating oil in the course of their respective movements. Smooth sliding is ensured.

[0017]

SUMMARY OF THE INVENTION A conventional rotary compressor using a roller and a blade-integrated piston is constructed as described above. As described above, the ejection side guide receiver 4
Since the discharge side guide 1 is moved in the direction of the blade movement space 45 by the force Fp due to the differential pressure, the reaction force Fd from the blade movement space side end 47 of the discharge side guide receiver 43 is
Act on. Therefore, since the point of action is at the end, the radius of curvature is a corner (edge) near infinity (infinitely zero), so that the width of the contact surface between them is narrow and the contact surface pressure becomes extremely high. The blade movement space side end 47 is connected to the drive shaft 5.
Is always in contact with the discharge side guide 1 during one rotation, the supply of lubricating oil to the blade movement space side end 47, which is the point of application of the discharge side guide reaction force Fd, is not sufficient. Of these, the blade motion space side end 47 of a cylinder made of gray cast iron having a lower hardness than the discharge side guide 1 is significantly worn, and the discharge side guide 1 and the suction side guide 2 are malfunctioning, that is, the discharge side guide 1 is locked. As a result, the drive shaft 5 becomes unrotatable, wear powder generated by wear hinders the movement of the blade 62, or the wear powder causes the blade 62, the discharge side guide 1, the suction side guide 2 and the drive It enters into various sliding parts such as the shaft 5 and the roller 61 and damages or forcibly locks the sliding parts, or is discharged to the refrigeration circuit, and closes a throttle part such as a capillary pipe in the circuit. There will is a problem that was.

In the conventional lubrication method for the sliding portions of the blade 62, the discharge side guide 1 and the suction side guide 2,
Since the cylinder head 7 closes the lower side of the blade movement space 45 into which the lubricating oil is dropped, there is no flow of the dripped lubricating oil, and during low-speed operation where the rotation speed of the drive shaft 5 is low, the blade 62 is closed. The movement of the lubrication oil is slow, so that the same lubricating oil stays indefinitely, deteriorating the lubricating oil and impairing the lubricity, causing damage and locking of the sliding part, and wear dust in the blade movement space 45. There is a problem that the accumulated powder impedes the movement of the blade 62 or the accumulated wear powder enters various sliding portions of the blade 62 and the discharge-side guide 1 and the suction-side guide 2 to cause damage and, in effect, lock. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to minimize the wear of the discharge-side guide receiver so as to eliminate the generation of abrasion powder and to attain stable operability of both guides. It is an object of the present invention to obtain a highly reliable rotary compressor having a blade and a method of lubricating sliding portions of both guides, which secures and does not generate deposits in a blade movement space.

[0020]

SUMMARY OF THE INVENTION A rotary compressor according to the present invention is provided with a cylinder having a cylinder chamber, a roller housed in the cylinder chamber, and a protrusion integrally provided on an outer peripheral portion of the roller. Can be divided into a low-pressure chamber and a compression chamber, a blade movement space to prevent the reciprocating motion accompanying the swing of the blade, and a discharge guide guide and a suction guide guide formed in the cylinder. And a discharge-side guide and a suction-side guide supported by a rotary compressor having a blade movement space in a low-pressure or intermediate-pressure atmosphere, wherein the blade is located at a top dead center or a bottom dead center in a cylinder chamber of the blade. With the center line extending in the protruding direction of the base line as the base line, the discharge side guide is provided within a range of some orbital angles with the blade inclined to the discharge side with respect to this base line. The blade movement space side end portion is exposed from the discharge side guide to face the blade movement space, and supplies the lubricating oil to the blade movement space side end.

Further, in the rotary compressor according to the first aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and the blade of the discharge side guide receiver extends from the center line extending in the protruding direction of the blade. When the shortest distance to the movement space side end is L1 and the shortest distance to the cylinder chamber side end is L2, L1 is set to be smaller than L2.

In the rotary compressor according to the first aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and is orthogonal to the center line extending in the protruding direction of the blade, and When the shortest distance from the straight line passing through the center of the swing to the blade motion space side end face of the discharge side guide is L3, and the shortest distance to the cylinder chamber side end face is L4, L3 is set to be smaller than L4. is there.

Also, a cylinder having a cylinder chamber, a roller fitted into the eccentric shaft of the drive shaft and housed in the cylinder chamber, and provided integrally with the outer periphery of the roller so as to protrude therefrom,
A blade for partitioning the cylinder chamber into a low-pressure chamber and a compression chamber, a blade movement space for preventing the reciprocating motion accompanying the swinging of the blade, and a discharge guide guide and a suction guide guide formed in the cylinder. A rotary compressor having a discharge-side guide and a suction-side guide movably supported, and in which the blade movement space has a low-pressure or intermediate-pressure atmosphere, the blade movement space of the discharge-side guide receiver during one rotation of the drive shaft. The side end faces the blade movement space without contacting the ejection side guide.

According to a fourth aspect of the present invention, in the rotary compressor according to the fourth aspect, the roller is located at a top dead center or a bottom dead center in the cylinder chamber, and the blade of the discharge-side guide receiver extends from a center line extending in a direction in which the blade projects. When the shortest distance to the movement space side end is L1 and the shortest distance to the cylinder chamber side end is L2, L1 is set to be smaller than L2, and the seal length of the flat surface and upper and lower end surfaces of the discharge side guide is set. It is a longer one.

Further, in the rotary compressor according to the fourth aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and is orthogonal to the center line extending in the protruding direction of the blade, and When the shortest distance from the straight line passing through the center of the swing to the blade movement space side end surface of the discharge side guide is L3, and the shortest distance to the cylinder chamber side end surface is L4, L4 is set to be larger than L3. is there.

A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, a discharge side guide and a suction side guide which are swingably supported by a discharge side guide receiver and a suction side guide receiver formed in a cylinder, In a rotary compressor in which the blade movement space has a low-pressure or intermediate-pressure atmosphere, at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening, and the blade movement space is provided. And the upper opening of the blade movement space is formed to the extent that the blade movement space side end of the discharge side guide receiver faces. It is.

In the rotary compressor according to the present invention, at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening and discharged from the blade movement space. The opening of the upper surface of the blade movement space is formed up to a range where the end of the discharge-side guide receiver on the blade movement space side faces.

A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, a discharge side guide and a suction side guide which are swingably supported by a discharge side guide receiver and a suction side guide receiver formed in a cylinder, In a rotary compressor in which the blade movement space has a low-pressure or intermediate-pressure atmosphere, at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening, and the blade movement space is provided. And the cross-sectional area of the lubricating oil discharge passage in this blade movement space is smaller than the cross-sectional area of the top opening of the blade movement space. Are those that form.

Further, in the rotary compressor according to the first or eighth aspect, at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening portion, and the blade movement space is opened. And the upper surface opening of the blade movement space is formed up to the range where the blade movement space side end of the discharge side guide receiver faces,
At least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening,
The blade movement space is discharged, and the cross-sectional area of the lubricating oil discharge passage in the blade movement space is formed smaller than the cross-sectional area of the upper opening portion of the blade movement space.

Further, in the rotary compressor according to the ninth or tenth aspect, a blade movement space is formed in the cylinder, and the lower surface of the blade movement space is formed by rollers and blades and a discharge side guide and a suction side guide. Cover with a cylinder head supporting in the direction, and form a notch step on either one of the upper surface facing the blade motion space of the cylinder head or the lower surface near the blade motion space of the cylinder. An axial gap is provided between the cylinder and the cylinder head by the notch step, and this gap is used as a lubricant oil discharge passage in the blade movement space.

Further, in the rotary compressor according to the ninth or tenth aspect, the lower surface of the blade movement space of the cylinder is covered with a cylinder head that supports the rollers and blades and the discharge side guide and the suction side guide in the axial direction. The cylinder head is formed with a through-hole, one of which opens into the blade movement space, and this through-hole serves as a lubricating oil discharge passage in the blade movement space.

A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, a discharge side guide and a suction side guide which are swingably supported by a discharge side guide receiver and a suction side guide receiver formed in a cylinder, In a rotary compressor in which the blade movement space has a low-pressure or intermediate-pressure atmosphere, an end of the discharge-side guide receiver on the blade movement space side is formed in an R shape.

Further, in the rotary compressor according to the thirteenth aspect, the R shape is formed by bringing a rotating brush with abrasive grains into contact with a discharge side guide receiver.

Further, in the rotary compressor according to any one of the first to fourteenth aspects, the rotary compressor is a closed type, the inside of a closed vessel including a blade movement space is a low-pressure atmosphere, and the refrigerant does not contain chlorine and fluorine. A refrigerant containing a hydrocarbon-based refrigerant as a main component is used.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1 of the present invention will be described below with reference to the drawings. The same reference numerals are given to the same or corresponding parts as in the conventional example, and the description thereof will be omitted. 1 to 3 show a first embodiment, FIG. 1 is a longitudinal sectional view of a rotary compressor, FIG. 2 is a horizontal sectional view of a main part of FIG. 1, and FIG. 3 is a partial arrow view of FIG. Also in the rotary compressor of the first embodiment, the inside of the sealed container 100 has a low-pressure atmosphere, which is the suction pressure, as in the conventional example. FIG. 2 shows that when the top dead center is the revolving angle 0 °, the swing angle 定義 defined above becomes maximum on the discharge side, that is, the blade 62 is inclined maximum on the discharge side (the side opposite to the suction port 42). Generally revolving angle 90
° indicates a state in the vicinity.

As shown in FIG. 2, in the rotary compressor of the first embodiment, when the blade 62 is inclined to the discharge side at the maximum, the end 47 of the discharge side guide receiver 43 on the blade movement space side is moved. , Is exposed from the ejection side guide 1 without being hidden by the ejection side guide 1, and faces the blade movement space 45 which is a low pressure atmosphere. As described above, in the rotary compressor according to the first embodiment, the blade motion space side end 47 of the discharge-side guide receiver 43 is brought into contact with the discharge-side guide 1 even in a small revolution angle range during one rotation of the drive shaft 5. The dimensional relationship is such that it can face a low-pressure atmosphere without any problems.

For this reason, while the discharge side guide 1 is exposed to the blade movement space 45, the blade movement space side end 47 can contact the lubricating oil supplied to the blade movement space 45, and the drive shaft 5 It is possible to newly make the blade motion space side end portion 47 wet with lubricating oil once during one rotation of, and the temperature rise of the blade motion space side end portion 47 by opening to the low pressure space. Is suppressed. Therefore, after being released from the discharge side guide 1, it is hidden again by the discharge side guide 1, and the discharge side guide reaction force Fd acts on the blade movement space side end 47, and thereafter, Fd
It is connected to the vicinity of the revolution angle 270 ° where the maximum value acts, but unlike the conventional one in which the blade movement space side end 47 is hidden by the discharge side guide 1 during one rotation of the drive shaft 5 at all times. During the rotation, the blade movement space side end portion 47 is exposed from the discharge side guide 1 and lubricating oil is supplied during a certain period of time. Abrasion of the blade movement space side end 47 of the side guide receiver 43 can be significantly suppressed.

In FIG. 2, the blade movement space side end 47 is exposed from the discharge side guide 1 in the vicinity of the revolving angle 90 ° where the swing angle 最大 becomes maximum on the discharge side (opposite the suction port 42 side). However, not only the rotation angle around 90 ° but also the larger rotation angle range in which the blade movement space side end 47 is exposed, if the rotation speed of the drive shaft 5 is the same, the blade movement space side end Since the portion 47 can be in longer contact with the lubricating oil, the effect of suppressing the wear of the blade movement space side end portion 47 is great, and the blade 62 is inclined toward the discharge side (opposite the suction port 42 side) all the time. Blade movement space side end 47
Is exposed from the discharge side guide 1, wear of the blade movement space side end 47 can be significantly suppressed.

As shown in FIG. 1, the rotary compressor according to the first embodiment has a blade 62 and a discharge-side guide 1,
The lubrication method for the sliding portion of the suction side guide 2 is also different from that of the conventional example, thereby solving the problems of the conventional example. In FIG. 1, reference numeral 36 denotes an oil supply hole formed in a flange 37 of the frame 3, which is provided so as to penetrate the flange 37 in the axial direction. Is open to the lower end face 38 of the flange and faces a blade movement space 45 formed in the cylinder 4. In addition, flange upper end surface 3
An outer wall 39, which protrudes in the axial direction from the flange upper end surface 32 and is formed integrally with the frame 3, is provided on the entire outer periphery of the outer periphery of the outer periphery of the frame 2. Further, since the outer periphery of the cylinder head 7 is located inside the outer peripheral end of the blade movement space 45,
The cylinder head 7 does not block the entire lower side of the blade movement space 45, and the lower side of the blade movement space 45 is partially opened into the closed container 100.

FIG. 3 is a view from above of the frame 3 of FIG. Here, as shown in FIG. 3, the lubrication hole 36 provided in the flange portion 37 is located below the lubrication hole 36 without the blade motion space side end 47 of the discharge side guide receiver being hidden by the flange portion 37 of the frame 3. It is exposed to the side opening, and when the frame 3 is viewed from above, the blade motion space side end 47 is seen through the oil supply hole.

The refueling method according to the first embodiment having the above-described configuration will be described. As in the conventional example, lubricating oil is dropped on the upper end surface 32 of the flange portion of the frame 3, and the dropped lubricating oil is
An outer wall 39 formed in a circumferential shape around the outer periphery of the flange portion 37 temporarily traps on the upper end surface 32 of the flange portion, and almost all the oil is supplied to the oil supply hole 36 from the opening of the oil supply hole 36 on the upper end surface 32 of the flange portion. Since the blade movement space side end 47 of the discharge side guide receiver 43 faces the lower opening of the oil supply hole 36 as described above, a part of the lubricating oil flowing into the oil supply hole 36 is Directly and continuously onto the blade movement space side end 47 of the blade.

Accordingly, the lubricating oil dropped directly contacts the blade movement space side end 47 at the timing when the blade movement space side end 47 is exposed from the discharge side guide 1, and the blade movement space side end 47 is raised to the full height. The wet state can be obtained over the lubricating oil. Thus, the drive shaft 5
Since sufficient lubricating oil can be supplied to the blade movement space side end 47 on which the maximum discharge side guide reaction force Fd acts during one rotation of the above, wear of the blade movement space side end 47 can be significantly suppressed.

The lubricating oil applied to the vicinity of the blade movement space side end 47 is caused by the swinging movement of the discharge side guide 1.
Part of the pressure is drawn between the discharge-side guide 1 and the discharge-side guide receiver 43. However, since the pressure in the compression chamber 150 is higher than the pressure in the blade movement space 45, the pressure difference in the compression chamber 150
No lubricating oil flows into the refrigeration circuit, and the outflow of lubricating oil to the refrigeration circuit does not increase.

Almost all of the lubricating oil that has flowed into the oil supply hole 36, including the lubricated end 47 on the blade movement space side, is partially closed in the closed container 100 without being closed by the cylinder head 7. Blade movement space 4
5 is discharged into the closed container 100 from the lower side, and the oil reservoir 13
Return to 0. Therefore, during operation, the blade movement space 45
The lubricating oil is continuously supplied and discharged continuously, so that the lubricating oil does not deteriorate, and abrasion powder and degraded lubricating oil and organic materials accumulate in the blade movement space 45. Not even.

Although the oil supply hole 36 is formed in a circular shape in the embodiment shown in FIG. 3, any shape can be used as long as the blade movement space side end 47 of the discharge side guide receiver 43 can be exposed in the oil supply hole 36. However, the outer wall 39 is not always necessary, and the effect of the invention shown in the first embodiment can be obtained by any method for supplying the lubricating oil to the oil supply hole 36.

In the first embodiment, during one rotation of the drive shaft 5, the blade movement space side end 4
7 is exposed from the discharge-side guide 1, but the blade movement space side end 47 is always kept at the discharge-side guide 1 as in the conventional example.
Frame 3 in the same manner as above
An oil supply hole 36 provided in the flange 37 of the blade is formed to the extent that the blade movement space side end 47 of the discharge side guide receiver faces, and the lubricating oil supplied to the blade movement space 45 is discharged from the lower part of the blade movement space 45. Even if it does, since the lubricating motion of the discharge side guide 1 is supplied from the upper part of the blade movement space side end 47 to the blade movement space side end 47, the wear prevention effect of the blade movement space side end 47 can be obtained. Is obtained, and the lubricating oil is continuously supplied and discharged continuously, so that the lubricating oil does not deteriorate. No accumulation at 45.

Embodiment 2 Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a cross-sectional view of a main part of a rotary compressor according to the second embodiment, and shows a state where a roller 61 is located at a bottom dead center. As in the first embodiment, the blade movement space 45 has a low-pressure atmosphere substantially equal to the suction pressure. In such a state, the blade 62
The shortest distance L1 from the center line of the blade 62 extending in the direction in which it protrudes from the roller 61 to the blade movement space side end 47 of the discharge-side guide receiver 43 is the other end from the center line of the same blade 62. The shape of the discharge-side guide receiver 43 is set to be smaller than the shortest distance L2 of the side guide receiver 43 to the cylinder chamber side end 48. In the second embodiment, the position of the blade movement space side end 47 is set as small as possible by the blade. I am trying to approach 62.

When the discharge-side guide receiver 43 is configured in this manner, the blade movement space side end 47 can have a larger revolving angle range during one rotation of the drive shaft 5 exposed from the discharge-side guide 1. If the number of rotations of the drive shaft 5 is the same, the contact time of the lubricating oil with the blade movement space side end 47 becomes longer, and the blade movement space side end 47 is more reliably wetted with the lubricating oil. It becomes possible. Furthermore, since the time of exposure to the blade motion space 45, which is a low-pressure atmosphere space having a low temperature, is prolonged, the temperature of the blade motion space side end portion 47 can be lowered, so that the local viscosity of the lubricating oil is also improved. Also, the activation of the sliding surface is suppressed, and the abrasion of the blade movement space side end 47 on which the maximum discharge-side guide reaction force Fd acts during one rotation of the drive shaft 5 can be significantly suppressed.

Embodiment 3 Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a cross-sectional view of a main part of the rotary compressor according to the third embodiment, and shows a state where the roller 61 is located at the bottom dead center. As in the first embodiment, the blade movement space 45 has a low-pressure atmosphere substantially equal to the suction pressure. In this state, the blade 6 passes through the center of the ejection-side guide receiver 43,
The shortest distance L3 from the straight line perpendicular to the center line extending in the protruding direction to the blade movement space 45 end face of the discharge side guide 1 is the other end face of the discharge side guide 1 from the same straight line to the cylinder chamber 41 side end face. The shape of the ejection side guide 1 is set so as to be smaller than the shortest distance L4.

When the discharge side guide 1 is configured in such a shape, the blade motion space side end 47 can have a larger revolving angle range during one rotation of the drive shaft 5 exposed from the discharge side guide 1. Therefore, if the number of rotations of the drive shaft 5 is the same, the contact time of the lubricating oil with the blade movement space side end 47 becomes longer, and the blade movement space side end 47 is more reliably wetted with the lubricating oil. It is possible to do. Furthermore, since the time of exposure to the blade motion space 45, which is a low-pressure atmosphere space having a low temperature, is prolonged, the temperature of the blade motion space side end portion 47 can be lowered, so that the local viscosity of the lubricating oil is also improved. Also, the activation of the sliding surface is suppressed, and the abrasion of the blade movement space side end 47 on which the maximum discharge-side guide reaction force Fd acts during one rotation of the drive shaft 5 can be significantly suppressed.

In the third embodiment, the width of the flat surface 12 is L4 + L3, which is (L4-L) as compared with L4 + L4.
3) the flat surface 12 of the ejection side guide 1
Also, the length of the seal between the upper and lower end surfaces is reduced. Therefore, the third embodiment is effective for a rotary compressor which has a sufficient space and can make the size of the discharge side guide 1 relatively large with respect to the volume of the cylinder chamber 41. In order to increase the revolving angle range in which is exposed, the shortest distance from the straight line to the end face on the cylinder chamber 41 side is also L3, and the seal length can be secured more than the width of the flat surface 12 is L3 + L3. In addition, it is desirable that the suction-side guide 2 has the same shape as the discharge-side guide 1 in order to share parts.

Embodiment 4 FIG. Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a cross-sectional view of a main part of a rotary compressor according to a fourth embodiment. When the top dead center is set at a revolving angle of 0 °, the swing angle 先 defined above becomes maximum on the suction side, that is, the blade Reference numeral 62 denotes a state in which the angle of inclination is maximized toward the suction port 42 and is approximately in the vicinity of the revolution angle 270 °.
As shown in FIG. 6, in the rotary compressor according to the fourth embodiment, even when the blade 62 is inclined to the suction port 42 side at the maximum, the blade movement space end 47 of the discharge-side guide receiver 43 is discharged. It faces the blade movement space 45 which is a low-pressure atmosphere without being hidden by the side guide 1. As described above, the rotary compressor according to the fourth embodiment includes the one
The dimensional relationship is such that the blade movement space side end 47 of the discharge side guide receiver 43 does not contact the discharge side guide 1 during rotation.

In the fourth embodiment, therefore, the discharge-side guide receiving force Fd does not act on the blade movement space side end 47. The discharge-side guide reaction force Fd always acts on the curved surface portion of the discharge-side guide receiver 43 during one rotation of the drive shaft 5. Therefore, unlike the corners, the surface pressure can be kept low, so that the abrasion of the ejection side guide receiver 43 can be significantly reduced. On the other hand, the reaction point of the reaction force Fd of the discharge side guide 1 is an end portion. However, even if a local high surface pressure acts on the discharge side guide 1, the discharge side guide 1 and the suction side guide 2 remain high. Since it is heat-treated using speed tool steel as a material, it has a higher hardness than the cylinder 4 made of gray cast iron, and hardly wears.

In the fourth embodiment, since the seal length of the flat surface 12 and the upper and lower end surfaces of the discharge side guide 1 is reduced,
This is effective for a rotary compressor which has a sufficient space and can make the size of the discharge side guide 1 relatively large with respect to the volume of the cylinder chamber 41.

In the fourth embodiment, as a method for securing the seal length of the flat surface 12 and the upper and lower end surfaces of the ejection side guide 1, the shape of the ejection side guide receiver 43 is shown in the second embodiment. The shortest distance from the center line of the blade 62 extending in the direction in which the blade 61 protrudes from the roller 61 to the blade movement space side end 47 of the ejection side guide receiver 43 in a state where the roller 61 is located at the bottom dead center. L1 is the shortest distance L2 from the center line of the same blade 62 to the cylinder chamber side end 48 of the discharge side guide receiver 43 which is the other end.
By making the shape smaller, the seal length of the flat surface 12 and the upper and lower end surfaces of the ejection side guide 1 can be secured.

Further, the shape of the ejection side guide 1 is changed to the third embodiment.
In the state where the roller 61 is located at the bottom dead center, the roller 61 passes through the center of the ejection side guide receiver 43, that is, the swing center 46, and extends from the straight line perpendicular to the center line extending in the protruding direction of the blade 62 to the ejection side. The shape should be such that the shortest distance L4 from the same straight line to the other end surface of the discharge side guide 1 on the cylinder chamber 41 side end surface is longer than the shortest distance L3 from the guide 1 to the blade movement space 45 side end surface. However, in the fourth embodiment, the seal length of the flat surface 12 and the upper and lower end surfaces of the ejection side guide 1 can be secured.

Embodiment 5 Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a longitudinal sectional view showing a main part of a fifth embodiment. The same reference numerals are given to the same or corresponding parts as in the conventional example and the other embodiments described above, and the description thereof will be omitted. As shown in FIG. 7, the rotary compressor according to the fifth embodiment includes a blade movement space 45.
Is covered by a cylinder head 7, and a gap is formed between the upper surface of the cylinder head 7 near the blade movement space 45 and the lower surface of the cylinder 4.

In FIG. 7, the gap is formed by cutting a part of the upper surface of the cylinder head 7 and providing a notch step 71. The upper part of the blade movement space 45 communicates with the low-pressure space in the sealed container 100 through the oil supply hole 36 at the upper part and the gap formed by the cutout step 71 at the lower part. Here, the closed container 100 on the lower surface side of the blade movement space 45
The communication area with the inside is formed smaller than the cross-sectional area of the oil supply hole 36.

The operation of the fifth embodiment will be described. As in the first embodiment, almost all of the lubricating oil dropped on the flange upper end surface 32 is continuously supplied to the lubrication hole 36 from the opening on the flange upper end surface 32 of the lubrication hole 36, and the blade movement space The air is discharged into the closed casing 100 via the communication gap formed by the notch 71 as a passage via the passage 45, and returns to the oil reservoir 130. However, since the area of the communication gap serving as the discharge passage is smaller than the cross-sectional area of the oil supply hole 36, the volume of the lubricating oil discharged from the discharge passage must be smaller than that of the lubricating oil flowing into the oil supply hole 36. .

Therefore, the lubricating oil that has flowed in the blade movement space 45 is temporarily retained. As a result, the blade movement space 45 is filled with the lubricating oil, and with the swinging movement of the discharge-side guide 1, the retained lubricating oil is drawn between the discharge-side guide 1 and the discharge-side guide receiver 43. Since the oil is applied to the end portion 47, that is, positive lubrication to the blade movement space side end portion 47 can be achieved, abrasion of the blade movement space side end portion 47 can be largely suppressed.

The lubricating oil that fills the blade movement space 45 only temporarily stays, and is smaller than the amount of inflow.
As a result, the lubricating oil is not degraded in the blade movement space 45, and abrasion powder and degraded organic materials do not accumulate in the blade movement space 45.

In FIG. 7, a notch step 71 is provided on the upper surface of the cylinder head 7 to form a discharge passage. However, a notch step may be provided on the lower surface of the cylinder 4 to serve as a discharge passage.

As shown in FIG. 8, the cylinder head 7
To form a through hole 72 in the cylinder head 7, one opening in the blade movement space 45 and the other opening in the closed casing 100, and the hole is formed in the cylinder head 7. May be.

When the discharge passage is constituted by the cutout step 71 and the through hole 72 in this manner, the ratio of the area of the discharge passage to the area of the oil supply hole 36, that is, the blade movement space relative to the amount of lubricating oil flowing into the blade movement space 45. The ratio of the amount of the lubricating oil discharged from 45 can be easily managed.
In the case of the notch step 71, the depth and width of the step can be adjusted, and in the case of the through hole 72, the diameter can be easily adjusted.

In the specifications other than those described above, if the discharge passage area is smaller than the oil supply area to the blade movement space 45, the wear of the blade movement space side end 47 can be largely suppressed, and abrasion powder, The effect of preventing the degraded organic material from accumulating in the blade movement space 45 is obtained.

Embodiment 6 FIG. Next, a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a sectional view of a main part of a rotary compressor according to a sixth embodiment. Embodiment 6
As shown in FIG. 9, the end 47 of the discharge side guide receiver 43 on the blade movement space side is rounded, and
The third blade movement space side end 47 is formed in an R shape having a radius. The size or radius of R is 0.05
This is a small radius of about 0.3 mm to 0.3 mm. With this size of R, when the other part of the cylinder 4 is deburred with the rotating brush with abrasive grains, the brush with abrasive grains is included in parallel with the blade movement space side end 47. By contacting the discharge-side guide receiver 43, it can be formed easily and at low cost as compared with cutting with a blade.

As described above, even if a small radius of about 0.05 mm to 0.3 mm is formed on the blade movement space side end 47 of the discharge side guide receiver 43, the discharge side guide 1 and the discharge at this end are formed. The contact with the force of the side guide receiver 43 is
Since they come into contact with each other with a radius of curvature, the width of the contact surface is wider and the contact surface pressure is suppressed lower than at the corners (edges) as in the conventional example. Since the lubricating oil is smoothly drawn into between the discharge side guide 1 and the discharge side guide receiver 43 by the swinging motion of the side guide 1, wear of the blade movement space side end 47 of the discharge side guide receiver 43 can be suppressed. .

If the same rounding is performed on the blade movement space side end of the suction side guide receiver 44, the lubricating oil is smoothly drawn into between the suction side guide 2 and the suction side guide receiver 44. The effect of improving the lubrication state between the side guide 2 and the suction side guide receiver 44 is obtained.

In recent years, from the viewpoint of protecting the global environment, the combination of the refrigerant and the lubricating oil used in the refrigeration / air-conditioning system has been
From the combination of C refrigerant or HCFC refrigerant with mineral oil or alkylbenzene oil, etc., the combination was first changed to the combination of HFC refrigerant and ester oil to prevent ozone layer destruction.
Furthermore, the combination of HC refrigerant and mineral oil is being changed to prevent global warming.

The HFC refrigerant does not dissolve in mineral oil or alkylbenzene oil.
Ester oils, polyalkylene glycol (PAG) oils and ether oils compatible with the refrigerant are used, but these lubricating oils are inferior in lubricating performance as compared with mineral oils and alkylbenzene oils.

In the case of HC refrigerant, mineral oil and alkylbenzene oil can be used because they are compatible with most lubricating oils. However, from the results of long-term tests and severe tests of compressors,
It has been experimentally confirmed that the sliding surface of each sliding portion is rougher than the combination of a CFC refrigerant or an HCFC refrigerant with a mineral oil or an alkylbenzene oil, and the lubrication state is reduced.

Therefore, when the rotary compressor of the present invention is mounted on a refrigeration / air-conditioning system using an HFC refrigerant or an HC refrigerant, the effect of suppressing the wear of the discharge side guide receiver 43 is more remarkably exhibited. In order to prevent wear, it is not necessary to use a high-viscosity grade lubricating oil.
For freezing, lubricating oil of VG22 or less can be used.

The effects can be obtained by using each of the embodiments alone, but by using a plurality of them in combination, it is more effective to suppress the abrasion of the discharge side guide receiver 43.
In any of the embodiments, the blade movement space 4
5 is a low-pressure space substantially equal to the suction pressure. However, even if the pressure is intermediate between the discharge pressure and the suction pressure, the same applies if the pressure in the compression chamber 150 is higher than the pressure in the blade movement space 45. The effect is obtained. As in the case where the inside of the sealed container 100 is in the discharge pressure atmosphere, the blade movement space 45
When the pressure is substantially equal to the discharge pressure, the direction in which the differential pressure acts is opposite to that described above, and the ends of the two guide supports on the cylinder chamber side (particularly, the suction side guide receiver on which the differential pressure with the low pressure chamber which is always low pressure acts). Reaction force acts on the cylinder chamber side end of the
The same wear prevention measures as described above are required at the cylinder chamber side end.

[0074]

In the rotary compressor according to the present invention, the blade is discharged to the base line with the center line extending in the protruding direction of the blade when the roller is located at the top dead center or the bottom dead center in the cylinder chamber as the base line. The blade movement space side end of the discharge side guide receiver is exposed from the discharge side guide and faces the blade movement space in some revolving angle ranges in a state inclined to the side, and lubricating oil is applied to the blade movement space side end. By supplying the lubricating oil to the blade movement space side end of the discharge side guide receiver at the exposed timing, the high pressure of the compression chamber and the blade movement space can be supplied to the blade movement space side end of the discharge side guide receiver. Even if the discharge-side guide receiving force acts on the pressure difference from the low pressure, the wear on the blade movement space side end of the discharge-side guide receiver can be significantly reduced, and the generation of wear powder can be eliminated. There is an extremely high effect obtained a rotary compressor reliability with agonistic stable both guide.

Further, in the rotary compressor according to the first aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and the blade of the discharge-side guide receiver extends from the center line extending in the protruding direction of the blade. When the shortest distance to the end of the movement space side is L1 and the shortest distance to the end of the cylinder chamber side is L2, L1 is set to be smaller than L2. The contact time becomes longer, and the blade motion space side end can be more reliably wetted with lubricating oil.Therefore, the high pressure of the compression chamber and the blade motion space Even if the discharge-side guide receiving force acts on the pressure difference from the low pressure, the wear of the end of the discharge-side guide receiver on the blade motion space side can be further reduced.

In the rotary compressor according to the first aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and is orthogonal to the center line extending in the protruding direction of the blade, and When the shortest distance from the straight line passing through the center of the swing to the blade movement space side end face of the discharge side guide is L3, and the shortest distance to the cylinder chamber side end face is L4, L3 is set to be smaller than L4. Therefore, the contact time between the end of the blade movement space and the lubricating oil is prolonged, and the end of the blade movement space can be more reliably wetted with the lubricating oil. Even when the discharge-side guide receiving reaction force acts on the pressure difference between the high pressure of the compression chamber and the low pressure of the blade movement space, the wear of the end of the discharge-side guide receiver on the blade movement space side is reduced. It can be reduced.

Further, since the blade-movement-space-side end of the discharge-side guide receiver always faces the blade-movement space without making contact with the discharge-side guide during one rotation of the drive shaft, the high pressure in the compression chamber and the blade-movement space are reduced. The reaction force of the discharge side guide against the pressure difference from the low pressure always acts on the curved surface portion of the discharge side guide receiver during one rotation of the drive shaft, and unlike the corner portions, the surface pressure can be kept low. The wear of the bearing can be greatly reduced, and there is an effect that an extremely reliable rotary compressor having stable operation of both guides while eliminating the generation of wear powder can be obtained.

The rotary compressor according to claim 4, wherein the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and the blade of the discharge side guide receiver extends from the center line extending in the protruding direction of the blade. When the shortest distance to the movement space side end is L1 and the shortest distance to the cylinder chamber side end is L2, L1 is set to be smaller than L2, and the seal length of the flat surface and upper and lower end surfaces of the discharge side guide is set. By increasing the length, the wear of the discharge-side guide receiver can be significantly reduced, and the seal length of the flat surface and the upper and lower end surfaces of the discharge-side guide can be secured.

Further, in the rotary compressor according to the fourth aspect, the roller is located at the top dead center or the bottom dead center in the cylinder chamber, and is orthogonal to the center line extending in the protruding direction of the blade, and When the shortest distance from the straight line passing through the swing center of the to the blade movement space side end surface of the discharge side guide is L3 and the shortest distance to the cylinder chamber side end surface is L4, L4 is set to be larger than L3. In addition, the wear of the discharge-side guide receiver can be significantly reduced, and the seal length of the flat surface and the upper and lower end surfaces of the discharge-side guide can be secured.

Further, at least a part of the upper surface of the blade movement space is opened, lubricating oil is supplied to the blade movement space from the upper surface opening portion, discharged from the blade movement space, and discharged from the upper surface opening portion of the blade movement space. The lubricating oil can be dropped directly on the blade movement space side end by forming the side guide receiver to the extent that the blade movement space side end faces, so that the differential pressure between the high pressure of the compression chamber and the low pressure of the blade movement space can be reduced. Since the lubricating oil can be supplied to the blade movement space side end of the discharge side guide receiving member on which the discharge side guide receiving force acts, the wear of the discharge side guide reception side of the blade movement space side can be reduced. Also, during operation, the lubricating oil is continuously supplied to the blade moving space and is continuously discharged, so that abrasion powder, degraded lubricating oil and organic materials do not accumulate in the blade moving space. . As described above, the wear of the discharge-side guide receiver is minimized, the generation of wear powder is eliminated, the stable operability of both guides is ensured, and the blades and both guides that do not generate deposits in the blade movement space are formed. There is an effect that an extremely reliable rotary compressor having a method of lubricating the sliding portion can be obtained.

In the rotary compressor according to the first aspect, at least a part of the upper surface of the blade motion space is opened, and lubricating oil is supplied to the blade motion space from the upper surface opening portion and discharged from the blade motion space. The upper end of the blade movement space is formed to the extent that the blade movement space side end of the discharge side guide receiver faces, so that the blade movement space side end is exposed at the timing when the blade movement space side end is exposed from the discharge side guide. Since the lubricating oil can be dropped directly onto the blade, the end of the blade movement space side can be made wet with the lubricating oil over the entire height, so that the discharge side guide receiving force Fd acts on the discharge side guide receiving force. Sufficient lubricating oil can be supplied to the end of the blade movement space on the side of the blade. . Also, during operation, the lubricating oil is continuously supplied to the blade moving space and is continuously discharged, so that abrasion powder, degraded lubricating oil and organic materials do not accumulate in the blade moving space. . As described above, the wear of the discharge-side guide receiver is minimized, the generation of wear powder is eliminated, the stable operability of both guides is ensured, and the blades and both guides that do not generate deposits in the blade movement space are formed. There is an effect that an extremely reliable rotary compressor having a method of lubricating the sliding portion can be obtained.

Further, at least a part of the upper surface of the blade movement space is opened, lubricating oil is supplied to the blade movement space from the upper surface opening portion and discharged from the blade movement space, and a lubricating oil discharge passage of the blade movement space is provided. Is formed smaller than the cross-sectional area of the upper open portion of the blade movement space, so that the volume of the lubricating oil discharged from the lubricant flowing continuously into the blade movement space must be smaller. Therefore, the lubricating oil can be temporarily retained in the blade movement space, whereby the blade movement space is filled with the lubricating oil, and with the swinging motion of the discharge side guide, the retained lubricating oil is discharged. It is drawn between the guide and the discharge side guide receiver, and positive lubrication to the blade movement blade movement space side end can be achieved, so the blade movement space side end The wear can be greatly suppressed. The amount of lubricating oil that fills the blade movement space is smaller than the amount that flows in, but is continuously discharged from the discharge passage, so that the lubricating oil does not deteriorate in the blade movement space, and wear powder and organic materials The degraded material does not accumulate in the blade movement space. As described above, the wear of the discharge-side guide receiver is minimized, the generation of wear powder is eliminated, the stable operability of both guides is ensured, and the blades and both guides that do not generate deposits in the blade movement space are formed. There is an effect that an extremely reliable rotary compressor having a method of lubricating the sliding portion can be obtained.

A blade movement space is formed in the cylinder, and the lower surface of the blade movement space is covered with a cylinder head that supports the rollers and blades and the discharge side guide and the suction side guide in the axial direction. A notch step is formed on a part of the upper surface facing the blade movement space or a part of the lower surface near the blade movement space of the cylinder, and the notch step forms an axial gap between the cylinder and the cylinder head. By providing a gap and using this gap as a lubricant oil discharge passage in the blade movement space, by adjusting the depth and width of the notch stepped portion, the lubricant is discharged from the blade movement space with respect to the amount of lubricating oil flowing into the blade movement space. There is an effect that the ratio of the lubricating oil amount can be easily controlled.

The lower surface of the blade movement space of the cylinder is covered with a cylinder head that supports the rollers and blades and the discharge side guide and the suction side guide in the axial direction, and one end of the cylinder head is opened to the blade movement space. By forming a hole and making this through hole a lubricating oil discharge passage for the blade motion space, by adjusting the diameter of the through hole, lubrication discharged from the blade motion space with respect to the amount of lubricating oil flowing into the blade motion space There is an effect that the ratio of the oil amount can be easily managed.

Further, since the end of the blade guide space on the discharge side guide receiving portion is formed in an R-shape, the contact between the discharge side guide and the end portion of the blade motion space side becomes contact between members having a radius of curvature. , The contact surface width is wide, the contact surface pressure is kept low, and the end is rounded, so that the lubricating oil is smoothly drawn into between the discharge side guide and the discharge side guide receiver by the swinging motion of the discharge side guide. Because of this, the wear of the blade movement space side end of the discharge side guide receiver can be significantly reduced, and the extremely reliable rotary compressor which has stable operation of both guides while eliminating the generation of wear powder is obtained. Has the effect.

Further, since the brush with the abrasive grains rotating in the R-shape is formed by contacting the discharge-side guide receiver, the R-shape of the blade movement space side end of the discharge-side guide receiver can be formed at a low cost. is there.

Further, in the rotary compressor according to any one of claims 1 to 14, the rotary compressor is of a closed type, the inside of the closed vessel including the blade movement space is a low-pressure atmosphere, and the refrigerant does not contain chlorine and fluorine. The use of a refrigerant mainly composed of hydrocarbon-based refrigerant can significantly reduce the wear on the discharge side guide receiver even when the lubrication condition is reduced, eliminating the generation of wear powder and ensuring stable operation of both guides. There is an effect that a highly reliable rotary compressor having high reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment, and is a longitudinal sectional view of a rotary compressor.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a partial arrow view of FIG. 1;

FIG. 4 shows the second embodiment and is a cross-sectional view of a main part of the rotary compressor.

FIG. 5 is a view showing a third embodiment, and is a cross-sectional view of a main part of a rotary compressor.

FIG. 6 shows the fourth embodiment and is a cross-sectional view of a main part of the rotary compressor.

FIG. 7 is a view showing a fifth embodiment, and is a longitudinal sectional view of a main part of a rotary compressor.

FIG. 8 shows the fifth embodiment, and is a longitudinal sectional view of a main part of another rotary compressor.

FIG. 9 shows the sixth embodiment, and is a cross-sectional view of a main part of a rotary compressor.

FIG. 10 is a longitudinal sectional view of a conventional rotary compressor.

11 is a cross-sectional view of a main part of FIG.

FIG. 12 is an enlarged view of a main part of FIG. 11;

FIG. 13 is an explanatory diagram showing a balance with a force of a discharge side guide of a conventional rotary compressor.

FIG. 14 is a longitudinal sectional view of another conventional rotary compressor.

[Explanation of symbols]

1 discharge side guide, 2 suction side guide, 3 frames,
36 Oil supply hole, 4 cylinders, 41 cylinder chamber, 43
Discharge side guide receiver, 45 blade movement space, 47 blade movement space side end, 5 drive shaft, 51 eccentric shaft,
6 piston, 61 roller, 62 blade, 7 cylinder head, 71 notch step, 72 through hole, 100
Closed container, 140 low pressure chamber, 150 compression chamber.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masayuki Tsunoda 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Yoshihide Ogawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Eiji Watanabe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Corporation (72) Inventor Masao Tani 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Susumu Kawaguchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3H029 AA04 AA13 AB03 BB01 BB44 BB50 CC02

Claims (15)

[Claims] 1. A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, and a discharge side guide and a suction side swingably supported by a discharge side guide receiver and a suction side guide receiver formed in the cylinder, respectively. A rotary compressor having a blade movement space in a low-pressure or medium-pressure atmosphere, wherein a center of the blade extends in a protruding direction of the blade when the roller is located at a top dead center or a bottom dead center in the cylinder chamber. With the line as a base line, the blade of the discharge-side guide receiver is provided within a certain revolving angle range with the blade inclined to the discharge side with respect to the base line. Over de movement space side end portion is exposed from the discharge side guide to face the said blade movement space, the rotary compressor and supplying the lubricant to the blade movement space side end. 2. A state in which the roller is located at a top dead center or a bottom dead center in the cylinder chamber, from a center line extending in a protruding direction of the blade to a blade movement space side end of the discharge side guide receiver. 2. The rotary compressor according to claim 1, wherein L1 is smaller than L2, where L1 is the shortest distance and L2 is the shortest distance to the cylinder chamber side end. 3. A state in which the roller is located at a top dead center or a bottom dead center in the cylinder chamber, and is orthogonal to a center line extending in a protruding direction of the blade and passes through a swing center of the discharge side guide. The shortest distance from the straight line to the blade movement space side end surface of the discharge side guide is set to L3, and the shortest distance to the cylinder chamber side end surface is set to L4 so that L3 is smaller than L4. The rotary compressor as described in the above. 4. A cylinder having a cylinder chamber, a roller fitted into an eccentric shaft portion of a drive shaft and housed in the cylinder chamber, and provided integrally with an outer peripheral portion of the roller so as to protrude therefrom.
A blade for partitioning the cylinder chamber into a low-pressure chamber and a compression chamber, a blade movement space for preventing a reciprocating motion accompanied by swinging of the blade, and a discharge-side guide receiver and a suction-side guide receiver formed in the cylinder. A rotary compressor having a discharge side guide and a suction side guide, each of which is swingably supported, and wherein the blade movement space has a low-pressure or intermediate-pressure atmosphere, wherein the discharge-side guide is always provided during one rotation of the drive shaft. A rotary compressor, wherein an end of the blade movement space side of the receiver faces the blade movement space without contacting a discharge side guide. 5. A state in which the roller is located at a top dead center or a bottom dead center in the cylinder chamber, from a center line extending in a protruding direction of the blade to an end of the discharge-side guide receiver on a blade motion space side. Where L1 is shorter than L2 and L1 is shorter than L2, and the seal length of the flat surface and the upper and lower end surfaces of the discharge side guide is increased. The rotary compressor according to claim 4, wherein: 6. A state in which the roller is located at a top dead center or a bottom dead center in the cylinder chamber, and is orthogonal to a center line extending in a protruding direction of the blade and passes through a swing center of the discharge side guide. 5. The distance L4 is set to be larger than L3, where L3 is the shortest distance from the straight line to the blade movement space side end surface of the discharge side guide, and L4 is the shortest distance from the cylinder chamber side end surface. The rotary compressor as described in the above. 7. A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, and a discharge side guide and a suction side swingably supported by a discharge side guide receiver and a suction side guide receiver formed in the cylinder, respectively. A rotary compressor having a low-pressure or medium-pressure atmosphere in the blade movement space, wherein at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening. And, while discharging from the blade movement space, the upper opening of the blade movement space is closed by the blade movement space side end of the discharge side guide receiver. Rotary compressor, characterized in that formed to the extent faces. 8. An upper surface opening of the blade movement space, wherein at least a part of an upper surface of the blade movement space is opened, lubricating oil is supplied to the blade movement space from the upper surface opening and discharged from the blade movement space. 2. The rotary compressor according to claim 1, wherein a portion of the discharge-side guide receiver is formed so as to reach an end of the blade-movement-space side. 9. A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade, and a discharge side guide and a suction side swingably supported by a discharge side guide receiver and a suction side guide receiver formed in the cylinder, respectively. A rotary compressor having a low-pressure or medium-pressure atmosphere in the blade movement space, wherein at least a part of the upper surface of the blade movement space is opened, and lubricating oil is supplied to the blade movement space from the upper surface opening. The blade movement space is discharged from the blade movement space, and the cross-sectional area of the lubricating oil discharge passage in the blade movement space is increased by opening the upper surface of the blade movement space. Rotary compressor, characterized in that the smaller than the cross-sectional area of the. 10. An upper surface of the blade movement space is at least partially opened, lubricating oil is supplied to the blade movement space from the upper surface opening portion and discharged from the blade movement space, and a lubricant oil is discharged from the blade movement space. 9. The rotary compressor according to claim 1, wherein a cross-sectional area of the passage is formed to be smaller than a cross-sectional area of an upper open portion of the blade movement space. 11. The blade movement space is formed in the cylinder, and a lower surface of the blade movement space is covered with a cylinder head that supports the rollers and blades and the discharge side guide and the suction side guide in an axial direction. A notch step is formed on one of a part of an upper surface facing the blade movement space of the cylinder head or a part of a lower surface in the vicinity of the blade movement space of the cylinder. 11. The rotary compressor according to claim 9, wherein an axial gap is provided between the cylinder heads, and the gap is used as a lubricating oil discharge passage in the blade movement space. 12. A lower surface of a blade movement space of the cylinder is covered with a cylinder head which supports the rollers and blades and the discharge side guide and the suction side guide in an axial direction, and one of the cylinder heads is provided with the blade movement space. The rotary compressor according to claim 9 or 10, wherein a through-hole is formed to open in the lubricating oil discharge passage of the blade movement space. 13. A cylinder having a cylinder chamber, a roller provided in the cylinder chamber, and a blade integrally provided on an outer peripheral portion of the roller to partition the cylinder chamber into a low-pressure chamber and a compression chamber. , A blade movement space for not hindering reciprocating motion accompanied by swinging of the blade,
A rotary compression system including a discharge side guide and a suction side guide, each of which is swingably supported by a discharge side guide receiver and a suction side guide receiver formed in the cylinder, wherein the blade movement space is set to a low-pressure or intermediate-pressure atmosphere. A rotary compressor, wherein a blade movement space side end of the discharge-side guide receiver is formed in an R shape. 14. The rotary compressor according to claim 13, wherein the R shape is formed by bringing a rotating brush with abrasive grains into contact with the discharge-side guide receiver. 15. The rotary compressor is a hermetic type,
The inside of the sealed container including the blade movement space is set to a low pressure atmosphere,
The rotary compressor according to any one of claims 1 to 14, wherein a refrigerant mainly containing a hydrocarbon-based refrigerant containing no chlorine and fluorine is used as the refrigerant.