JPS6354915B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas compressor having a novel structure.

Variable displacement gas compressors are mainly classified into reciprocating piston type and rotary type, each having its own disadvantages and advantages.

In other words, the reciprocating piston type requires a complicated mechanism such as a crankshaft and connecting rod in order to convert rotational motion into reciprocating linear motion, and there is also a lot of mechanical loss due to this, and it is large compared to its capacity. becomes.

On the other hand, the rotary type uses rotational motion directly as power, so it has the advantage of having a simple and compact mechanism, but compared to the piston type, the leak area of the compression part is larger, especially at low speeds. Sometimes, gas leaks into the low pressure chamber during the compression stroke, resulting in an increase in driving power due to recompression.

The object of the present invention is to provide a mechanism that is simpler than the reciprocating piston type, has less compression leakage than the rotary type, and can be driven with less driving power.

In order to achieve the above object, the present invention includes a piston that is horizontally suspended in a cylinder chamber so as to be swingable, and a piston that is supported by a bearing passing through the cylinder chamber, and that is connected to the piston and swings the piston by its rotation. A piston drive shaft to be moved, an intake port and a discharge port that communicate with a compression working type formed by the outer periphery of the piston and the inner wall of the cylinder chamber, and check valves for intake and discharge provided in each port. The present invention provides a new oscillating type gas compressor comprising:

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 4 show a first embodiment of the invention.

In each figure, the gas compressor includes a cylindrical case 1 with one end open, a compressor main body 2 airtightly loaded into the case 1, and a front head 3 attached to the open surface of the case 1. .

The compressor main body 2 includes a rectangular cylindrical cylinder 4 whose inner periphery has a substantially pincushion-shaped cross section, a front head block 5 and a rear side block 6 mounted on both sides of the cylinder.
Inside the cylinder chamber with a pincushion-shaped cross section formed by the cylinder 4 and both side blocks 5 and 6, a pair of frog-like swinging pistons 7 and 7 are arranged above and below, and at the center of the cylinder chamber. A piston drive shaft 8 is provided which passes through the front head 3 and is rotatably supported at both ends of each side block 5, 6.

Each swinging piston 7 is configured to be able to swing left and right about a support shaft 9 whose both ends are pivotally supported by the front side block 5 and rear side block 6. A pair of cam floors 10 are rotatably provided.

On the other hand, in the center of the piston drive shaft 8, a substantially oblong cam 11 is integrated, which slides into contact with each of the cam floors 10 and swings each of the swing pistons 7 by its rotation.

Therefore, as the drive shaft 8 rotates, the swinging piston 7 swings, and as a result, the rocking piston 7 moves left and right inside the approximately crescent-shaped compression chamber surrounded by the back surface of the swinging piston 7 and the inner wall of the cylinder. and alternately expand and contract vertically symmetrically.

Correspondingly, the front side block 5 has intake ports 12, 12 penetrating into each of the working chambers.
... are formed at four locations, and plate-shaped check valves 1 and 3 are interposed between the front side block 5 and the end face of the cylinder 4.

As shown in FIG. 3, this check valve 13 is constructed by stamping and forming reed valves 13b, 13b, . It was formed in contact with the

In addition, the discharge side with respect to the intake side includes a plurality of discharge ports 14, 14, . Check reed valves 15, 15 installed on both sides of the cylinder 4
and a valve support 16 that is in contact with the back surface of the reed valve 15.

Furthermore, the sealing mechanism for the compression work chamber in the compressor main body 2 configured as described above may be provided at two points at both ends of the compression work chamber, that is, at both swing ends of the swing piston 7 and at the pivot point. In this embodiment, a gasket 17 made of a material such as Teflon is installed in a seal groove formed along the axial direction on the inner surface of the cylinder chamber.
17... is loaded.

Next, the operation of the gas compressor configured as described above will be explained.

When the swing cam 7 swings due to the rotation of the drive shaft 8, one of the working chambers expands, creating a negative pressure inside the working chamber.
Gas introduced from the intake port 18 provided in the front head 3 to the tip of the case 1 as shown by arrow A is transferred to the intake port 12 of the front side block 5.
After that, the reed valve 13b is opened and the liquid is sucked into the working chamber.

As shown in Figures 1 and 4A, at the position where one of the working chambers has reached its maximum confinement volume, the cam is displaced approximately 45 degrees from the center shaft, and is further driven clockwise. When the shaft 8 rotates, the volume of one of the working chambers is reduced and the reed valve 15 is opened to open the discharge port 14 as shown in FIG. 4B.
Compressed gas is discharged from the This gas flows from the gap formed between the cylinder 4 and the case 1 to the opening of the rear side block 6 (not shown), through the gap 19 formed at the rear of the case 1, and then to the discharge port 20.
Discharge to the outside.

At the same time, the volume of the working chamber on the other side is expanded, and the reed valve 13 is opened to suck in gas in the same manner as described above. When the drive shaft 8 is further displaced clockwise from this state, the volume of the one working chamber becomes zero, that is, the discharge process is completed, and the volume of the other working chamber reaches its maximum, as shown in FIG. 4c. becomes. When the drive shaft 8 further rotates from this state, the suction and discharge operations of gas are repeated alternately at the opposite position to the above, and thereafter, the rotation of the drive shaft 8 causes the rocking piston 7 to rock, one after another alternately. It performs suction and discharge operations.

Note that in this embodiment, the shape of the cam 11 is drawn as an oval shape for the sake of simplifying the explanation;
In reality, due to the rotation locus of the cam and the pressure difference applied to the back side of both sides of the swing piston, one of the cam floors always comes into sliding contact with the cam lead surface of the cam, allowing smooth swing movement. The cam lead surface has a unique shape.

FIG. 5 shows a second embodiment of the invention. However, the same reference numerals are used for the same parts as in the previous embodiment, and the explanation thereof will be omitted.

A pair of swinging pistons 30 in the same figure have cam grooves 31 formed in their centers, and a cam floor 32 that slides into these cam grooves 31 is provided at the center of the drive shaft 8 so that the swinging pistons 30 can be rotated with respect to the drive shaft 8. It is provided eccentrically so that the amount of eccentricity corresponds to the swing angle of the piston 30.

In this embodiment as well, suction and discharge operations are performed alternately in the same manner as described above.

Further, in this embodiment, the structure is simplified compared to the first embodiment, and the cam shape is also simplified.

Note that in this embodiment, one cam floor 3
Since each swing piston 30 is connected to the
Suction is carried out on one side of the cylinder chamber, while discharge is carried out on the other side. However, if a pair of cam floors 32 are provided facing each other at 180 degrees, and each swing piston 30 is connected to each cam floor 32, suction and discharge can be performed alternately on the upper and lower diagonals as in the first embodiment. be able to.

Further, in each embodiment, a pair of swinging pistons are provided, but it goes without saying that it is also possible to provide one swinging piston, or three or more swinging pistons.

As explained in detail in each embodiment above,
As described above, the present invention converts the rotational motion of the drive shaft into a rocking motion to alternately compress the sucked gas, so it is different from the conventional reciprocating piston type gas compressor. Compared to rotary gas compressors, there is no need for a complicated mechanism to convert rotational motion into linear motion, and the mechanism is simple.Furthermore, there is no compression leakage compared to a rotary gas compressor, and the sealing mechanism for that purpose is also compressible. Since it can be provided at both ends of the working chamber, there are various effects such as low sliding frictional resistance and low driving power.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a gas compressor according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the - line in FIG.
Fig. 3 is a front view showing the check valve along the - line in Fig. 2, Fig. 4 A, B, and C are explanatory diagrams showing the operation;
FIG. 5 is a sectional view according to a second embodiment of the present invention. 2... Compressor body, 4... Cylinder, 5... Front side block, 6... Rear side block, 7, 30... Swinging piston, 8... Drive shaft,
9... Support shaft, 12... Intake port, 13... Check valve, 13b... Reed valve, 14... Discharge port, 15... Reed valve.

Claims (1)

[Claims] 1. A piston horizontally suspended in a cylinder chamber so as to be swingable, a piston drive shaft that passes through the cylinder chamber and is supported by a bearing, and is connected to the piston and swings the piston by its rotation, and an outer periphery of the piston. A gas compressor comprising an intake port and a discharge port that communicate with a compression work chamber formed by a cylinder chamber and an inner wall of a cylinder chamber, and a check valve for intake and discharge provided in each port. .