JP2588911Y2 - Rotary compressor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor. [0002] strong demand for size and weight reduction for BACKGROUND ART vehicle air conditioning compressor, rotary compressor of conventional recip B type, shown open in, for example, JP-51-13409 Patent Publication The transition to rotary vane compressors is progressing. This rotary vane type compressor rotates a rotor in a cylinder of a casing to reduce a volume of a space formed between an outer peripheral surface of the rotor and an inner peripheral surface of the cylinder of the casing.
The pressure is increased / decreased by vanes rotating with the rotor, and the fluid is pumped in accordance with the change in the volume of this space. [0003] By the way, the rotary bevel
In a vane- type compressor (rotary compressor ), hydraulic pressure, compressed gas, A spring force is applied to press the vane tip against the inner wall of the cylinder. Therefore, mechanical loss is large, and worn pieces of the vane and the cylinder due to sliding contact between the vane and the cylinder are discharged into the discharge fluid, causing a secondary accident.
Further, since it is difficult to keep the pressure acting on the rear end of the vane or the reaction force from the inner surface of the cylinder constant at all times, the vane repeatedly rushes and retreats in the radial direction, so-called chattering occurs, and noise is generated. That is, since the vane is slid at a high speed while being pressed against the inner wall surface of the cylinder, the sliding condition is severe, which causes a decrease in mechanical efficiency and durability, and the vane back pressure is not sufficient at the time of starting. When the vane tip separates from the cylinder wall and collides again, there is a problem of chattering, the oil separator for separating the oil for vane back pressure lubrication in the high pressure chamber is necessary, and this back pressure supply There is a drawback that leakage loss is large due to the reverse flow of the oil from the high pressure side. The present invention has been made in view of the above points, and an object of the present invention is to provide a rotary compressor which has small friction loss and can improve mechanical efficiency and durability. [0006] The gist of the present invention Means for Solving the Problems], Example
The description will be made with reference to the reference numerals of FIGS.
The feature is that the inner wall surface is as shown in FIGS.
Cylinder 1 formed in a circular shape and this cylinder 1
Case consisting of side plates 2 and 3 closing both ends of
And a rotor 5 rotating in the cylinder 1.
Rotates with the rotor 5 and moves forward and backward in the radial direction of the rotor.
A rotary compressor having a pair of vanes 6
The shaft 5a of the rotor 5 is connected to one side plate 2
From the casing 4 to the radial bearing 11a,
11b, the rotor 5 is mounted on the cylinder
1 and cantilevered in an eccentric state with respect to the cylinder,
And the rotor 5 is on the side opposite to the rotor shaft 5a.
Is open and has a cavity S inside, while the pair of
2 is a single flat plate as shown in FIGS.
Cylindrical slide grooves projecting perpendicular to the flat plate on both sides of the center
The projection 9A is divided into two equal parts with reference to the projection 9A.
The pair of vanes 6 are arranged in a radial direction provided on the rotor 5.
Of the rotor 5
The protrusion 9A with the slide groove 9 located in the cavity S
Both ends 9A 'are open, and the rear portion is narrow in the longitudinal direction of the projection.
A long shaft insertion hole 9B is opened, and the slide groove 9 is provided.
A cylindrical or columnar elongated slide guide 10 fits inside
At the axial center of the slide guide 10,
A guide support shaft extending at right angles to the slide guide
The shaft 10b is fixed and the shaft 10b is
Opposite to the rotor shaft 5a through the shaft insertion hole 9B
Rotatably supported at the center of the side plate 3
And the tip of the vane 6 is moved in the same direction as the forward / backward movement.
It has a movable tip seal 13. According to the above construction, the pair of vanes 6 is connected to the cylinder
Without pressing with back pressure and centrifugal force within one wall, base
The slider 6 slides on the inner wall surface of the cylinder via the tip seal 13 . That is , the pair of vanes 6 is shared with the rotor 5.
, And this rotation causes the slide gutter in the slide groove 9 to rotate.
The id 10 also rotates, but in this case, the pair of vanes 6
The two flat plates are vertically bisected at the center by slide grooves 9
And the rotor 5 and the slide guide 10 are
By rotating eccentrically to the opposite direction, the cylinder can be adjusted according to the rotational position.
Slide groove 9 with cylindrical shape or cylindrical slide guide
Slides in the axial direction on the disk 10, thereby
The pair of vanes 6 are arranged in the radial direction of the rotor through the vane grooves 5b.
Move forward and backward. In this case, the tip 6a of the vane 6 draws
The locus R is not a perfect circle but a special curve.
Processing the circular surface shape of 1 according to the shape of this locus R
Then, a back pressure and a pair of vanes 6 are applied to the inner wall surface of the cylinder 1.
The outer peripheral surface of the rotor 5 can be
Of the space formed between the cylinder and the inner peripheral surface of the cylinder
Is increased or decreased by the vane 6 rotating with the rotor 5.
At least, pump the fluid as the volume of this space changes
You. By the above operation, the back pressure of the vane 6 is applied to the cylinder inner wall surface.
Non-contact without the need to press with centrifugal force
Low friction loss, high mechanical efficiency,
A rotary compressor with excellent durability can be obtained. Also,
The movement of the vane 6 is provided on the vane 6 as described above.
Slide groove 9 slides on the slide guide 10 in the axial direction.
It is performed by sliding (sliding).
Slide groove 9 is provided on the circumferential surface with respect to slide guide 10.
According to such a structure, the vane
6 has side plate 2 and 3 tilting force (vane and
Force within the small gap between the plates)
Even if it is done, between the slide groove 9 and the slide guide 10
No excessive force is applied to the sliding surface.
The wear of the guide 10 is suppressed, and thus these members
The durability can be improved. Further, in the present invention, a pair of bases are provided.
Since it is possible to configure the down 6 in one flat plate, the vanes
And the durability can be further improved. An embodiment of the present invention will be described below with reference to the drawings. [Embodiment 1] FIGS. 1 to 5 show an embodiment of the present invention. FIG.
Is a longitudinal sectional view showing the overall configuration of the present embodiment, and FIG.
Partial sectional view along line AA, box 3 is a sectional view taken along line BB in FIG.
FIG. 4 is a perspective view of a vane used in this embodiment, and FIG.
FIG. 9 is an explanatory diagram illustrating an operation state of the example. Rotation of this embodiment
The rotary compressor (rotary vane type compressor) rotates in the cylinder 1 and a casing 4 including a cylinder 1 having an inner wall surface formed in a circular shape and side plates 2 and 3 closing both ends of the cylinder 1. a rotor 5, a rotor 5 rotates with, and one pair you forward and backward motion in the radial vanes 6 or the like. In this figure, 5a is a shaft portion of the rotor 5, 5b is a pair of vane grooves provided in the rotor 5, 7 is a front cover, 8a, 8b, 8c are between the outer peripheral surface of the rotor 5 and the inner peripheral surface of the cylinder 1. Is a compression chamber , and 15 is a discharge valve. The shaft portion 5a of the rotor 5 is
From one side plate 2
Go out of the casing 4 and inside the front cover 7
Supported at two locations via the radial bearings 11a and 11b
Thus, by doing so, the rotor 5 is
The cantilever is eccentric with respect to the cylinder. side
The plate 2 is sandwiched between the front cover 7 and the cylinder 2.
Have been. The rotor 5 is opposite to the rotor shaft 5a.
The opposite side is closed and has a cavity S inside. On the other hand, a pair of
2 is a single flat plate as shown in FIGS.
Cylindrical slide protruding perpendicular to the flat plate on both sides of the center
It is configured by vertically dividing the projection 9A with the groove 9 into two equal parts.
It is. The pair of vanes 6 is attached to the rotor 5 at 180-degree intervals.
Reciprocating operation is possible in a pair of radially arranged vane grooves 5b
Plugged in. The inner wall of the end plate portion 5c of the rotor 5 has a radius
Yes escaping groove 5d is provided in a direction, the relief groove 5d is the
By connecting with the vane groove 5b, the vane 6 is
When inserted into b, a part of the flat plate constituting the vane 6
It is designed to enter 5d of escape. Rotor 5 circumference
The compression chamber formed between the inner periphery of the
6, the compression chambers are divided into three compression chambers 8a, 8b and 8c.
You. The protrusion 9A with the slide groove 9 is located on one side of the circumference of the hollow cylinder.
The rotor 5 has a cavity (internal space)
(Interval) It is located in S, and its both ends 9A 'in the longitudinal direction are open.
An elongated shaft insertion hole 9B is formed on the back side in the longitudinal direction of the projection.
Has been spoken. Suitable for slide groove surface in slide groove 9
An elongated cylindrical slide guide 10 is fitted. This
A slide guide is provided at the axial center of the slide guide 10.
Guide support shaft 10b extending at right angles to the id
The shaft 10b is fixed to the shaft insertion hole 9B.
Through the side plate 3 opposite to the rotor shaft 5a
It is rotatably supported at the center. In this embodiment,
The id support shaft 10b is provided on the side plate 3.
The slide guides are supported by the radial bearings 12a and 12b.
And slide it together with the slide guide 10
It is so. In this way, the rotor 5 and the slide
The guide 10 is placed in a relatively eccentric parallel positional relationship.
The relative eccentricity, the rotation by the rotor 5, and the
Of the slide groove 9 on the slide guide 10
Ride operation (on the outer peripheral surface 10a of the slide guide 10)
The sliding operation) causes the pair of vanes 6 to
When rotating with the slide guide 10, the vane groove 5
b to advance and retreat in the rotor radial direction.
You. Details of this operation will be described later with reference to FIG. Vane
6 has a tip seal 13 built into its tip 6a.
The tip seal 13 moves in the same direction as the vane 6 moves forward and backward.
And can move freely between the inner wall of the cylinder 1
Seals small gaps. With the above configuration, the rotary compressor according to the present embodiment is provided.
Performs the operation shown in FIG. That is, the rotor
5 receives the power, and the rotor 5 passes the P point .
When rotated in the heart, but rotate together even vane 6 incorporated in the vane structure 5b, because it is bound by a slide guide 10 rotating vane 6 is also centered <br/> the Q point, the vane The vertical bisector of 6 always passes through point Q. As a result, as shown by arrows (a) to ( d ), the vane 6 moves one way (outward) in the reciprocating motion in the vane groove 5b during the half rotation of the rotor 5. During the remaining half rotation , the remaining backward movement is performed as shown by arrows ( d ) to (a) in the figure, and the vane 6 rotates the vane groove 5b by one rotation of the rotor 5.
Reciprocate once inside. In this case, the tip 6 of the vane 6
The locus R drawn by a is not a perfect circle but a special curve,
If the circular shape of the inner wall of the cylinder 1 is machined in accordance with the shape of the locus R, the compression chamber 8a which repeatedly increases and decreases in volume with the rotation of the rotor 5 by the rotor 5, the cylinder 1, the vane 6, and the side plates 2, 3. , 8b, 8c to serve as positive displacement compressors. In this embodiment , the cylinder 1 uses a closed curve whose inner peripheral surface is slightly larger than the trajectory R of the tip of the vane 6, and a small gap between the tip of the vane 6 and the tip seal 13 is used for sealing. doing. As described above, according to the present embodiment, it is not necessary to press the vane 6 against the inner wall surface of the cylinder with back pressure and centrifugal force, so that the vane 6 can be brought into non-contact. A superior rotary compressor can be obtained. Further, the vane 6 can be mechanically and reliably reciprocated in the vane groove 5b of the rotor 5 even when there is no back pressure at the time of starting or the like, so that chattering does not occur and noise can be prevented. Also, there is no need to separate the oil for applying the back pressure, and the oil separator and the high-pressure chamber space are not required, so that the rotary compressor can be reduced in size and weight. Further, the forward / backward movement of the vane 6 is provided on the vane 6.
Slide groove 9 slides on the slide guide 10 in the axial direction.
It is performed by sliding (sliding).
Slide groove 9 is provided on the circumferential surface with respect to slide guide 10.
According to such a structure, the vane
6 has side plate 2 and 3 tilting force (vane and
Force within the small gap between the plates)
Even if it is done, between the slide groove 9 and the slide guide 10
No excessive force is applied to the sliding surface.
The wear of the guide 10 is suppressed, and thus these members
The durability can be improved. In addition, a pair of vanes 6
The strength is ensured by the construction of a flat plate,
Improve durability. [Embodiment 2] FIGS. 6 to 8 show another embodiment of the present invention. Book
Only the differences between the embodiment and the first embodiment will be described below. You
That is, in this embodiment, the slide guide 10A (the first actual
(Corresponding to the slide guide 10 of the embodiment)
On the other hand, the guide support shaft 14 (the shaft 1 of the first embodiment)
0b) to the side plate 3a (the size of the first embodiment).
Bolts and nuts).
To the tip 14a of the guide support shaft 14.
Ride guide 10A can be rotated via radial bearing 2c
Noh fit. Even in this case, the first implementation
The operation and effects of the aircraft and the example are obtained, and the slide guide
Bearing for supporting the shaft portion of the
The boss for accommodating the bearing is side-mounted as in the first embodiment.
Since there is no need to provide it on the rate 3 side, the overall compressor
It is possible to further reduce the length in the axial direction,
Moreover, the side plate 3a and the slide guide 10
The shape of A can be simplified. As described above, according to the present invention, the rotary
In the vane type rotary compressor, it is possible to obtain a rotary compressor which has small friction loss and can improve mechanical efficiency and durability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a rotary compressor according to an embodiment of the present invention. FIG. 2 is a partial sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. 1; FIG. 4 is a perspective view of a vane used in the first embodiment. FIG. 5 is an explanatory diagram showing an operation state of the first embodiment. FIG. 6 is a longitudinal side view of another embodiment of the rotary compressor of the present invention.
FIG. FIG. 7 is a partial sectional view taken along the line CC of FIG . 6; FIG. 8 is a sectional view taken along line DD of FIG . 6; [Description of Signs] 1 ... cylinder, 2, 3, 3a ... side plate, 4 ... casing, 5 ... rotor, 5a ... shaft portion of rotor,
5b: vane groove, 6: vane, 6a: tip of vane,
8a, 8b, 8c: compression chamber, 9: slide groove, 9A: protrusion
Cause, 9B ... shaft insertion hole, 10,10A ... Sly Dogaido,
10b: guide support shaft, 13: tip seal.

Claims (1)

(57) [Rules for requesting registration of utility model] A cylinder (1) having an inner wall surface formed in a circular shape and a side plate for closing both ends of the cylinder (1)
A casing (4) comprising (2, 3) and the cylinder
Rotor (5) rotating in (1) and this rotor (5)
Rotates with, the rotary compressor and a a pair of vanes you forward and backward motion in the radial direction of the rotor (6), the shaft of the rotor (5) (5a) is one Saidopu
Out of the casing (4) from the rate (2)
The bearings are supported via aluminum bearings (11a, 11b).
The motor (5) in the cylinder (1)
The rotor (5) being cantilevered in an eccentric state
Is open on the side opposite to the rotor shaft (5a).
Portion has a cavity (S), while the pair of vanes (6) is a single flat plate.
Cylindrical slide protruding perpendicular to the flat plate on both sides of the center
Vertically halving the projection (9A) with the groove (9) as a reference
And the pair of vanes (6)
The difference between the pair of radial vane grooves (5b) provided in (5)
The slide (5) positioned in the cavity (S) of the rotor (5).
The protrusion (9A) with the groove (9) has both ends (9A ')
A shaft insertion hole (9
B) is open, and a cylinder is provided in the slide groove (9).
Or cylindrical elongated slide guide (10) is fitted
In the axial center of the slide guide (10),
A guide support shaft extending at right angles to the slide guide
The shaft (10b) is fixed, and the shaft (10b) is fixed.
b) passes through the shaft insertion hole (9B) and
To the center of the side plate (3) opposite to
The vane (6) is supported rotatably in the same direction as the forward and backward movement.
A rotary compressor having a movable tip seal (13) .