JP3850507B2 - Gas compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas compressor used in an air conditioner system such as a car air conditioner.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 4 and 5, a gas compressor used in an air conditioner system has a compressor main body 4 connected to an electromagnetic clutch 3 in the casing 1 by closing the opening end of the casing 1 with a front head 2. It is stored.
[0003]
The compressor body 4 has a cylinder 7 having a substantially oval inner periphery between a pair of side blocks (a front side block 5 and a rear side block 6), and a cylinder defined by the side blocks 5, 6 and the cylinder 7. A rotor 9 is rotatably mounted in the chamber 8, and a shaft portion 10 of the rotor 9 is supported by a bearing 11 of the front side block 5 and a bearing 12 of the rear side block 6.
[0004]
The rotor 9 is formed with a plurality of slit-like vane grooves 13 extending radially in the radial direction. A vane 14 is attached to the vane groove 13 so as to advance and retreat in the radial direction of the rotor 9. The rotor 9 is biased toward the inner wall surface of the cylinder 7 by the centrifugal force and the oil pressure at the bottom of the vane groove 13.
[0005]
As shown in FIG. 5, a space partitioned by the both side blocks 5, 6, the cylinder 7, the rotor 9, and the vane 14 is used as a small chamber (compression working chamber) 15 in the cylinder chamber 8. Perform gas compression.
[0006]
That is, when the rotor 9 rotates and the internal pressure of the compression working chamber 15 changes, the refrigerant gas in the suction chamber 16 is sucked into the compression working chamber 15 due to the change in the internal pressure and compressed.
[0007]
At that time, the refrigerant gas in the suction chamber 16 is introduced through the suction port 17 of the casing 1, and the compressed refrigerant gas passes from the compression work chamber 15 to the discharge hole 18 of the cylinder 7, the discharge communication path of the rear side block 6, The oil separator 19 and the discharge chamber 20 are sequentially passed, and the discharge port 21 reaches the air conditioner system side outside the casing 1.
[0008]
[Problems to be solved by the invention]
Thus, in the conventional gas compressor, as shown in FIG. 6, a rectangular or square vane 14 is mounted in a vane groove 13 formed in a slit shape in the rotor 9. In order for the vane 14 to relieve the sliding resistance between the inner peripheral surface of the cylinder 7 and the four sides of the vane 14, one side 14 a that is in sliding contact with the inner peripheral surface of the cylinder 7 is subjected to R machining. .
[0009]
However, since the wear between the one side 14a of the vane 14 and the cylinder 7 is severe due to long-term use, the life of the vane 14 is short, and this greatly affects the life of the gas compressor. Has been pointed out.
[0010]
Further, in the conventional vane 14, it is necessary to perform R machining only on one side 14 a, and when the vane 14 is assembled to the rotor 9, the side 14 a subjected to R machining is mounted so as to face the circumferential surface of the rotor 9. When working and assembling work, the work must be carried out in consideration of the direction of the vane 14, and the work is very troublesome and has become a major factor in reducing productivity. .
[0011]
The present invention has been made in view of such circumstances, and by extending the life of the vane, the durability of the gas compressor is improved, and the workability in the vane processing work and the assembly work to the rotor is improved. It aims at providing the gas compressor which made it possible to improve productivity and to improve productivity.
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a horizontally-enclosed cylinder mounted between a pair of side blocks and a cylinder chamber formed by the pair of side blocks and cylinders. And a plurality of vanes attached to a vane groove formed in the rotor and capable of moving forward and backward in the radial direction of the rotor. The refrigerant gas is sucked into the cylinder chamber and compressed by the rotation of the rotor. In the gas compressor that discharges the refrigerant gas into the discharge chamber, a disk-like vane is mounted in the vane groove of the rotor, and the inner peripheral surface of the cylinder is curved along the axial direction so as to match the outer shape of the vane. By being set, when the rotor is driven to rotate, the disk-like vane moves forward and backward in the vane groove while rotating, and is in sliding contact with the inner circumferential surface of the cylinder.
[0013]
Here, the inner peripheral surface of the cylinder having an inner peripheral elliptic cylinder is set to be curved along the axial direction, and the curved surface has a curvature equal to the curvature of the disk-shaped vane.
[0014]
Similarly, the outer peripheral surface of the rotor is curved along the axial direction and has a curvature equal to the curvature of the inner peripheral surface of the cylinder.
[0015]
On the other hand, the disk-shaped vane is rounded along the outer peripheral edge in order to reduce the sliding resistance between the inner circumferential surface of the cylinder, and this disk-shaped vane is formed on the bottom of the vane groove of the rotor. Is supplied and back pressure is applied to the vane .
[0016]
As is clear from the above configuration, a disk-like vane is mounted in the vane groove of the rotor, and the cylinder inner peripheral surface is set to a curved surface equal to the outer shape of the vane along its axial direction . . The disk-like vanes in the vane groove are sandwiched between both side blocks, and during the operation of the gas compressor, they are moved back and forth while receiving the back pressure of the oil and being pressed against the inner peripheral surface of the curved surface. The disk-like vane in the vane groove that receives the back pressure of the oil not only slides on the inner peripheral surface of the cylinder, both side blocks, and the vane groove, but also freely rotates around its central axis.
When the operation of the gas compressor provided with the disk-shaped vane is continued, the disk-shaped vane rotates irregularly. The reason seems to be that the following phenomenon occurs. That is, it is known that various vibrations occur during the operation of the gas compressor, and back pressure fluctuations occur sequentially. The vibration energy promotes the generation of rotational self-excited motion in the rotatable disk-shaped vane, and the back pressure fluctuation is applied non-uniformly to the disk-shaped vane and acts as a rotational torque that causes it to rotate leftward or rightward. Seem.
[0017]
Therefore, the slidable contact portion with the inner peripheral surface of the cylinder at the peripheral edge of the disk-shaped vane is not partially concentrated but is distributed along the entire periphery.
[0018]
Further, since the vanes to be mounted on the vane grooves of the rotor are set in a disk shape, it is not necessary to consider the directionality of the R processing, and it is also necessary to consider the directionality when mounting to the vane grooves of the rotor. Absent.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a gas compressor according to the present invention will be described in detail with reference to the accompanying drawings.
[0020]
1 is an axial sectional view of a rotor showing the overall configuration of a gas compressor according to the present invention, FIG. 2 is a radial sectional view of the rotor of the gas compressor, and FIG. 3 is a main part of the gas compressor according to the present invention. It is explanatory drawing which shows a structure.
[0021]
The same components as those in the conventional example will be described with the same reference numerals.
[0022]
In the drawings, a gas compressor according to the present invention has a casing 1 in which an opening end of a casing 1 is closed by a front head 2, and a compressor body 30 connected to an electromagnetic clutch 3 is accommodated in the casing 1.
[0023]
The compressor main body 30 has a cylinder 31 having an inner circumferential substantially elliptic cylinder shape between the side blocks 5 and 6, and the cylinder body 8 defined by the side blocks 5 and 6 and the cylinder 31 has a cylinder chamber 8. The rotor 32 is horizontally mounted to be rotatable, and a plurality of vane grooves 33 are formed along the radial direction of the rotor 32, and each vane groove 33 has a disk shape that can advance and retreat in the radial direction of the rotor 32. A vane 34 is attached.
[0024]
Next, the overall configuration of the gas compressor according to the present invention will be described along the flow of the refrigerant gas.
[0025]
First, the refrigerant gas introduced into the cylinder chamber 8 through the suction port 17 and the suction chamber 16 of the casing 1 is caused by the cylinder 31, the rotor 32, the both side blocks 5 and 6, and the disk-shaped vane 34 constituting the compressor body 30. The refrigerant gas is supplied into the partitioned compression work chamber 35 and compressed in the compression work chamber 35 by the rotational drive of the rotor 32. The discharge hole 18 provided in the cylinder 31, the discharge communication path of the rear side block 6, the oil separator 19 and the discharge chamber 20 are sequentially passed, and the high-pressure refrigerant gas reaches the air conditioner system side outside the casing 1 from the discharge port 21.
[0026]
By the way, this invention aims at improving the durability of a gas compressor, and improving the work precision of a vane, and the assembly | attachment workability | operativity of a vane.
[0027]
That is, the disk-shaped vane 34 is mounted in the vane groove 33 of the rotor 32, and the inner peripheral surface of the cylinder 31 is set to the curved surface 31a along the axial direction so as to match the outer shape of the disk-shaped vane 34. It is in.
[0028]
More specifically, the disk-like vane 34 is rounded so as to relieve the sliding resistance between the inner peripheral surface of the cylinder 31 and, as shown in FIG. At the bottom, vane back pressure oil is supplied through a back pressure oil supply path 36 of the cylinder 31. During operation of the gas compressor, the rotor 32 rotates to cause the disk-like vane 34 to perform its own self-excited motion and vane. The back pressure oil, that is, the hydraulic pressure, moves forward and backward in the vane groove 33 while rotating in the direction of the arrow in the drawing, and comes into sliding contact with the inner peripheral surface 31 a of the cylinder 31.
[0029]
Accordingly, when the gas compressor is operated, the disk-like vane 34 is in sliding contact with the inner peripheral surface 31a of the cylinder 31 while the rotor 32 rotates, so that the refrigerant gas is compressed. The sliding contact portions of the disk-shaped vane 34 with respect to the inner peripheral surface 31a are not partially concentrated as in the prior art, and can be dispersed along the entire circumference of the disk-shaped vane 34. The service life of the gas compressor can be extended and the durability can be significantly increased.
[0030]
Further, the disk-shaped vane 34 only performs R processing on the periphery, and has a processing direction as compared with a processing operation in which R processing is performed only on one specific side such as a rectangular shape or a square shape as in the past. Since it is not necessary to consider the directionality in the assembling work for assembling the disk-like vane 34 to the rotor 32 as well, the workability in the machining work and the assembling work of the vane 34 is improved as compared with the prior art. And has the advantage of improving productivity.
[0031]
In the present embodiment, the vane groove 33 is drilled at two locations on the rotor 32, and the disk-shaped vane 34 is mounted in the two vane grooves 33. However, the number of installed disk-like vanes 34 may be arbitrarily set, such as three, four, etc.
[0032]
【The invention's effect】
As described above, the gas compressor according to the present invention has the special effects described below.
[0033]
(1) In the gas compressor according to the present invention, the disk-shaped vane is mounted in the rotor so as to be able to advance and retreat, and the inner peripheral surface of the cylinder is set to a curved surface equal to the outer shape of the disk-shaped vane in the axial direction. During operation of the gas compressor, the vane slides against the cylinder inner surface while rotating by the self-excited motion of the disk-shaped vane and the back pressure of the vane, so that only the side of the vane is compressed as in the past. The life of the gas compressor is extended by extending the life of the vane by dispersing the wear allowance along the entire circumference of the disk-shaped vane without causing frictional contact with the cylinder inner surface. And the durability of the gas compressor can be remarkably improved.
[0034]
(2) The gas compressor according to the present invention is configured such that a disk-like vane is mounted in the rotor so as to be able to advance and retreat, and the inner peripheral surface along the axial direction of the cylinder is set to a curved surface that matches the outer shape of the vane. Therefore, there is no need to consider the direction during vane processing and the direction when assembling the vane to the rotor as in the prior art, and the workability during vane processing and vane assembly can be improved. , It has the effect that productivity can be improved.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a gas compressor according to the present invention and is an axial sectional view of a rotor.
2 is a cross-sectional view taken along the line II-II in FIG. 1, and is a radial cross-sectional view of a rotor in the gas compressor.
FIG. 3 is an axial sectional view of a rotor showing a main part of the gas compressor.
FIG. 4 is an axial sectional view of a rotor in a conventional gas compressor.
5 is a cross-sectional view taken along line V-V in FIG. 4 and is a radial cross-sectional view of a rotor in the gas compressor.
FIG. 6 is an explanatory view showing a conventional vane and a rotor.
[Explanation of symbols]
1 Casing 2 Front Head 5 Front Side Block 6 Rear Side Block 16 Suction Chamber 17 Suction Port 18 Discharge Port 21 Discharge Port 30 Compressor Main Body 31 Cylinder 32 Rotor 33 Vane Groove 34 Disc Vane 35 Compression Work Chamber 36 Back Pressure Oil Supply Path

Claims (1)

A cylinder having a substantially inner cylindrical shape provided between a pair of side blocks, a rotor horizontally mounted in a cylinder chamber formed by the pair of side blocks and the cylinder, and a vane formed on the rotor In a gas compressor comprising a plurality of vanes mounted in a groove and capable of advancing and retreating in the radial direction of the rotor, wherein the refrigerant gas is sucked and compressed into the cylinder chamber by the rotation of the rotor, and the compressed refrigerant gas is discharged into the discharge chamber ,
While mounting the disk-like vane in the vane groove of the rotor, the inner peripheral surface of the cylinder is set to a curved surface along the axial direction so as to match the outer shape of the vane, so that when the rotor is driven to rotate, A gas compressor characterized in that a disk-like vane moves forward and backward in a vane groove while rotating, and is in sliding contact with an inner peripheral surface of a cylinder.

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