JPH0754785A - Rotary compressor - Google Patents

Abstract

PURPOSE:To reduce a noise by using a compound vane, in which a plurality of sheets of vanes are arranged, in a rotor of a rotary compressor of arranging the vane in the rotor inserted to the inside of a housing, so as to reduce a delivery amount per one time. CONSTITUTION:In a rotary compressor, a vane is arranged in a rotor 12 inserted to the inside of a housing. The rotor 12 is formed of a cone unit brought into slide contact with a disk wall between suction and delivery ports in the housing and a partial spherical unit 28 arranged in a bottom surface of this cone unit. Here in the rotor 12, a plurality of split grooves 40A, 40B passing a center line of this rotor are formed. In each split groove 40A, 40B, a plurality of sheets of vanes 14A, 14B, crossing with each other, are slidably inserted. Further, each vane 14A, 14B is formed of a chord in slide contact with the disk wall of the housing and an arc into slide contact with a semispherical wall respectively. By using a compound vane thus obtained, a delivery amount per one time is decreased, to reduce a noise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor having a hemispherical housing and a vane that is in sliding contact with the housing.

[0002]

2. Description of the Related Art A rotary compressor similar to the rotary compressor according to the present invention but different in structure and operation principle is proposed as a "swash plate pump" in Japanese Patent Publication No. 55-4956. Has been done.

The proposed swash plate pump will be briefly described below in order to clarify the difference from the rotary compressor according to the present invention and to facilitate understanding of the rotary compressor according to the present invention. .

The swash plate pump includes a housing, a separator, and
It has a passive swash plate and a driving means. The housing has a spherical wall and a cone protruding from the spherical wall, and the cone has an inlet and an outlet. The separator is provided with a circular arc portion that slides on the spherical wall while having a sealing effect, and a flow hole through which a fluid can pass is formed in a part thereof. The passive swash plate can move in contact with the spherical wall, the conical body and the wall surface and the separator while having a sealing effect. The driving means drives the passive swash plate via a shoe, which is a sliding member, or a spring member.

The conical body is provided with a split groove passing through the center line of the conical body. The separator is slidably accommodated in the split groove. The passive swash plate and the separator plate are engaged with each other. The passive swash plate driven by the drive means is slidably in contact with the spherical wall of the housing while being swung by the separator.
The line of contact between the passive swash plate and the wall of the cone orbits around this wall.

In the swash plate pump described above, the cone is fixed,
A passive swash plate goes around it. Then, it is necessary to swing the passive swash plate while blocking its rotation. Therefore, there is a crankcase in the case of a 4-cycle engine, which has been a constraint for downsizing and weight reduction. Further, since the separator plate has the flow holes, the suction side and the discharge side are communicated once per rotation, so that a high pressure and a large flow rate cannot be obtained. Therefore,
This swash plate pump has a complicated structure, a large number of parts, is not compact and lacks in performance. Further, since the discharge is performed once per one rotation, vibration and noise caused by pulsation increase.

In order to solve this, the present inventor has already proposed a rotary compressor having a simple structure, a small number of parts, a compact size, an inexpensive price, and an excellent compression performance (Japanese Patent Laid-Open No. 5-18376). Issue).

The configuration of the proposed conventional rotary compressor will be described below with reference to FIG. In FIG. 3, (a) is a front sectional view and (b) is a right side sectional view. The rotary compressor includes a housing 10 and a rotor 12
And a vane 14. The housing 10 comprises a disc wall 16 and a hemispherical wall 18. The disc wall 16 is provided with an inlet 20 and an outlet 22 in close proximity to each other. The housing 10 is formed integrally with a tubular body 24 extending upward.

As shown in FIG. 3 (a), the disc wall 16 is arranged at an angle of 45 °. Also, FIG.
As shown in (b), the inlet port 20 is substantially 90 °.
The fan-shaped discharge port 22 has a slit-like opening. The suction port 20 and the discharge port 22 are provided on both sides of the longitudinal axis along the slope of the disc wall 16. A hemispherical recess 26 is formed in the center of the disc wall 16, and a sphere 28 is fitted into the recess 26.

The rotor 12 is inserted into the housing 10. The rotor 12 includes a cone body 30 and a partial sphere body 32. When the rotor 12 rotates, the side surface of the conical body 30 makes sliding contact with the disc wall 16 between the suction port 20 and the discharge port 22.
That is, the side surface of the conical body 30 is in sliding contact with the longitudinal axis along the slope of the disc wall 16. The rotor 12 is formed integrally with a substantially T-shaped shaft 34 extending upward from the outer spherical wall of the partial spherical body 32. The shaft 34 is supported by the tubular body 24 via a radial bearing 36 and a thrust bearing 38.

The bottom surface of the partial sphere 32 is provided integrally with the bottom surface of the conical body 30. A split groove (slit) 40 is provided in the rotor 12 through the center line thereof. A spherical recess 42 is formed at the apex of the cone 30 so as to be pivotally supported by the sphere 28.

The vane 14 is slidably inserted in the split groove 40. The vane 14 is composed of one vane plate as shown in the drawing, and the chord 14a slidably contacting the disc wall 16 and the hemispherical wall 1 are provided.
Shape of a semi-circular plate consisting of an arc 14b that slidably contacts 8 (fan shape)
Are doing The vane 14 including only one vane plate will be referred to as a single vane here.
In the state shown in FIG. 3, the vane 14 has the disk wall 16
Is rotated 45 ° with respect to the direction of the longitudinal axis along the slope of the.

The rotor 12 is rotated clockwise by a driving unit (not shown) around the rotary shaft 12a as shown by an arrow A in FIG. When the rotor 12 rotates in this manner, the half-disk vane 14 slidably inserted into the split groove 40 rotates along the split groove 40. At this time, the chords 14a of the vanes 14 are in sliding contact with the disc wall 16 of the housing 10, and the arcs 14b of the vanes 14 are in sliding contact with the hemispherical walls 18 of the housing 10,
4 orbits around the disc wall 16.

Although not described in detail, a plurality of spaces (packets) are formed by the vane 14, the housing 10 and the side surface of the conical body 30. Each of these spaces is
At some time, it communicates with the suction port 20 and the discharge port 22. When communicating with the suction port 20, the fluid is sucked into the space, and thereafter, the volume of the space is reduced, and the discharge port 22
, The compressed fluid in the space is discharged from the discharge port 22. Thus, in this rotary compressor, the conical body 30 of the rotor 12 rotates and the disc wall 16 is fixed. For the detailed operation of this rotary compressor, refer to Japanese Patent Laid-Open No. 5-18376.

[0015]

As described above, the conventional rotary compressor has the vane 14 having a single vane composed of only one vane plate. Therefore, in the conventional rotary compressor, the discharge can be performed only twice while the rotor 12 makes one rotation. As a result, the conventional rotary compressor
As the handling volume increases, vibration and noise due to pulsation also increase, as in the case of the swash plate pump described above.

Therefore, a technical object of the present invention is to provide a rotary compressor which has low vibration and low noise.

[0017]

A rotary compressor according to the present invention has a housing, a rotor, and a plurality of vane plates. The housing consists of a disc wall and a hemispherical wall. An inlet and an outlet are provided in the disc wall in close proximity to each other. The rotor is inserted in the housing. The rotor consists of a cone and a partial sphere. On the side of the cone,
Sliding on the disc wall between the inlet and outlet. The partial sphere is provided on the bottom surface of the cone. A plurality of split grooves are provided in the rotor through the center line thereof. The plurality of vane plates are slidably inserted in these split grooves. Each of the plurality of vane plates is in the shape of a semi-circular plate consisting of a chord that slidably contacts the disc wall and an arc that slidably contacts the hemispherical wall. The plurality of vane plates are arranged so as to intersect each other.

[0018]

The vane composed of a plurality of vane plates will be referred to as a composite vane herein. When the rotor rotates about its rotation axis, the composite vane in which a plurality of vane plates are slidably inserted into the plurality of split grooves rotates along the plurality of split grooves. At this time, in the composite vane composed of a plurality of vane plates, the chords of the vane plates are in sliding contact with the disk wall of the housing, and the arc of each vane plate is in sliding contact with the arc of the housing, while the composite vane is around the disk wall. Orbit. A plurality of spaces (packets) are formed by the composite vanes, the housing and the sides of the cone. The plurality of spaces may communicate with the suction port or the discharge port at some time. When communicating with the suction port, the fluid is sucked into the space, and thereafter, the volume of the space is reduced, and when communicating with the discharge port, the compressed fluid in the space is discharged from the discharge port.

As described above, the rotary compressor of the present invention is provided with the composite vane composed of a plurality of vane plates. Thus, for example, if the composite vane consists of two vane plates, it will eject four times during one revolution of the rotor, and if it comprises three vane plates, it will eject six times during one revolution of the rotor. Along with that, the discharge amount per time becomes smaller, and the pulsation can be reduced. Further, as the number of vane plates forming the composite vane increases, the number of spaces (packets) formed from suction to discharge also increases, so that the pressure difference between adjacent packets decreases and blow-by decreases. it can. As a result, the sealing property is improved, and the volume efficiency at low speed rotation can be improved. Further, the larger the number of vanes, the more the amount of protrusion of the vanes coming out from the slit of the rotor at the time of generating the intake space (packet) at the time of suction increases, and the handling volume increases.

[0020]

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

Referring to FIG. 1, a rotary compressor according to an embodiment of the present invention uses a composite vane instead of a single vane, except that the structure of the rotor is modified as described below. It has the same structure as that shown in FIG.
Therefore, components having the same functions as the components of the rotary compressor shown in FIG. 3 are designated by the same reference numerals, and their description will be omitted.

Since the rotary compressor of this embodiment has a housing having the same structure as that shown in FIG. 3, the housing is not shown in FIG. 1, and the rotor 12 constituting the rotary compressor, the composite vane and , Sphere 28 is shown in exploded perspective view. In this embodiment, the composite vane consists of two vane plates 14A and 14B.

The vane plate 14A has a substantially semi-circular shape, and is symmetrical with respect to the center line C _{A in} the range between the center point O _A and the radius R _A and at an angle θ _A of the inner opening 14A. −
1 is empty. On the other hand, the vane plate 14B is also substantially in the shape of a semi-circular plate, and symmetrically with respect to the center line C _B ,
An outer opening 14B-1 is formed in a range between the outer peripheral edge and the center point O _B and a radius R _{B in the} radial direction and at an angle θ _B. Here, the radius R _A is longer than the radius R _B (R _A > R
_B ) is set to be. Also, the angles θ _A and θ _B
Is set in consideration of the following two points. Vane board 14A
The inner opening 14A-1 and the outer opening 14B-1 remain in the rotor 12 even when 14 and 14B are inserted and slid in the two split grooves of the rotor 12 as described later. The vane plates 14A and 14B slide in the rotor 12 without hindering the sliding of other vane plates.

The rotor 12 includes vane plates 14A and 14A.
Two split grooves (slits) 40A and 40B for B are provided orthogonally to each other (at an angle interval of 90 °).

Next, the rotor 12, the composite vane and the sphere 28.
The assembling method of and will be described. First, the rotor 12
The vane plate 14 in the slits 40A and 40B of
Insert A and 14B with each other crossed. Next, the spherical body 28 is mounted in the recess 42 of the rotor 12.

In this way, the composite vanes are
After the assembly, the rotor 12 and the sphere 28 may be welded or bonded so that they are integrated. In that case,
The rotor 12 is reinforced by the sphere 28. Instead, the vane plate 14B and the sphere 28 are welded and bonded so that they are integrated with each other, or the vane plate 14B from the beginning.
The ball and the sphere 28 may be integrally formed.

In any case, when the composite vane is assembled to the rotor 12 as described above, the vane plate 14A is formed.
And 14B are slidable within slits 40A and 40B, respectively.

As described above, when the composite vane is composed of the two vane plates 14A and 14B, it discharges four times while the rotor 12 makes one rotation. Along with that, the discharge amount per time becomes smaller, and the pulsation can be reduced. In addition, compared with the conventional single vane, in the composite vane, since the number of spaces (packets) formed from suction to discharge is large, the pressure difference between adjacent packets becomes small, Blow-by can be reduced. As a result, the sealing property is improved, and the volume efficiency at low speed rotation can be improved.

When the vane is a single vane, as shown in FIG.
As shown in (b), the opening shape of the suction port 20 is substantially a 90 ° fan shape. However, when the composite vane is used as the vane as in the present invention, it is necessary to change the opening shape of the suction port 20 to a shape different from that of the single vane, as described below. That is, the opening shape of the suction port 20 is changed so that the packet volume formed at the time when the fluid intake from the suction port 20 is completed is maximized. For example, when the composite vane is composed of the two vane plates 14A and 14B as in the present embodiment, the opening shape of the suction port 20 is substantially fan-shaped at 135 °.

Further, it is needless to say that the present invention is not limited to the above-mentioned embodiments, and various modifications and changes can be made within the scope of the present invention. For example, as shown in FIG. 2, three vane plates 14A and 14B are used as a composite vane.
And 14C may be used. In this case, in order to allow the three vane plates 14A to 14C to cross each other, the vane plate 14A has an inner opening 14A-1 with a radius R _A.
And the vane plate 14B has an outer opening 14B having a radius R _B1.
-1 and an inner opening 14B-2 having a radius R _B2 are provided, and the vane plate 14C is provided with an outer opening 14C-1 having a radius R _C. Here, these radiuses R _A , R _B1 , R _B2 , and R _C have R _A > R
There is a relationship of _B1 > R _B2 > R _C. Of course, these three vane plates 14A to 14C are respectively connected to each other by 6 in the rotor.
It is slidably inserted into three slits (not shown) provided at an angular interval of 0 °. The same configuration can be applied when four or more vane plates are used as the composite vane.

[0031]

As described above, according to the present invention, since the composite vane composed of a plurality of vane plates is used as the vane, it is possible to reduce the discharge amount per time and reduce the pulsation. A rotary compressor with low vibration and low noise can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a rotor, a composite vane, and a sphere used in a rotary compressor according to an embodiment of the present invention.

FIG. 2 is a plan view showing a composite vane used in a rotary compressor according to another embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional rotary compressor,
(A) is a front sectional view and (b) is a right side sectional view.

[Explanation of symbols]

 12 rotors 14A, 14B, 14C vane plate 28 spheres 40A, 40B split groove (slit)

Claims (1)

[Claims] 1. A housing comprising a disc wall and a hemispherical wall, the suction port and the discharge port of which are provided close to each other on the disc wall, and the housing which is inserted into the housing and which has the suction port and the discharge port. A rotor comprising a conical body slidingly contacting the disc wall on the side surface between and and a partial sphere provided on the bottom surface of the conical body, and in a plurality of split grooves provided in the rotor through its center line. Plural vane plates that are slidably inserted and each have a semicircular disk shape that is composed of a chord that slidably contacts the disc wall and an arc that slidably contacts the hemispherical wall. A rotary compressor having.