JPS6397892A - Lateral scroll compressor - Google Patents

Abstract

PURPOSE:To reduce vibration and noise caused by torque fluctuation by arranging two pairs of compression mechanism and motors in a tightly closed chamber so that fixed scrolls of the compression mechanisms are set back to back with each other and by shifting centers of eccentric aces of both compression mechanisms by 180 deg. from each other. CONSTITUTION:The first compression mechanism 2 and a motor 3 are arranged at one side of a tightly closed chamber 1, and the second compression mechanism 2' and a motor 3' are arranged, at the other side of it, and both compression mechanism 2 and 2' are situated so that antilap side end plates of those fixed scrolls 7 and 7' are situated so that they are opposed to each other. Centers Om and Om' of eccentric axes 11 and 11' of swivel scrolls of both compression mechanisms and 2' are set so that they are shifted by 180 deg. to each other. By this, even if one of the compression mechanisms 2 and 2' is set in a pause and discharge capacity is lowered, fluctuation of the compression mechanism 2 and 2' are offset by each other, and generation of vibration and noise is reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a horizontal scroll compressor used as a refrigerant compressor for refrigeration or nitrogen conditioning or a helium compressor.
In particular, low vibration and low noise are aimed at (this is a suitable horizontal scroll compressor).

(Prior art) For the conventional 4JL cedar scroll IE p1 machine 1, the fle is as described in Utility Model Publication No. 164693/1983 (! One pressure J in the closed f-Yaiba. In addition, it is a high-pressure chamber type with a closed chamber circle, high pressure, and high pressure atmosphere U type] This is intended to achieve low vibration and low noise.

However, no consideration was given to the torque fluctuations of the compression engine when using a compressor.

(Problem to be solved by the invention) The above-mentioned conventional technology does not take into consideration the torque fluctuation of the compression 1 when controlling the compression system. There was a problem with the noise getting louder when I left work.

OBJECTS OF THE INVENTION To provide a horizontal scroll compressor that can reduce torque fluctuations even with n, 8il control, and achieve low S movement and low noise. A first compressor groove combining an orbiting scroll and a fixed scroll having a spiral wrap on one side in a closed chamber;
an i-th electric motor for driving a main shaft connected to the orbiting scroll; A second motor for driving the connected main shaft is provided, and the end plates on the non-wrap side of the fixed scrolls in the two-pressure machine groove are arranged to face each other, while driving the orbiting scroll of the first compression mechanism. The center of the eccentric shaft that drives the orbiting scroll of the second compression mechanism and the center of the eccentric shaft that drives the orbiting scroll of the second compression mechanism are arranged at positions shifted by 180 degrees from each other, so that the gas compressed by both compression mechanisms is transferred to the inside of the closed chamber. This is achieved by discharging the air and creating a high-pressure atmosphere in the sealed chamber.

(Operation) When the first compression mechanism and the second compression mechanism are driven, the suction gas is compressed by the first compression mechanism and the second compression mechanism, and the compressed gas is discharged into the closed chamber and flows inside the closed chamber. After creating a high temperature and high pressure atmosphere, it is discharged to the outside.In addition, when capacity control is performed, the center of the eccentric shaft for driving the orbiting scroll of the first pressure ga mechanism and the orbiting scroll drive of the second compression mechanism Since the centers of the eccentric shafts of the camera are offset by 180 degrees (90 degrees) from each other, the torque fvJ is suppressed for shooting.

The noise becomes quieter. That is, low loss and low noise can be achieved (examples).One embodiment of the present invention will be explained below with reference to Figures 1 to 8. jg Figure 1 is a longitudinal sectional view of a horizontal scroll compressor according to the present invention, and Figure 2 is a sectional view taken along the arrows ``-'' in Figure 1. One compression mechanism 2 and an electric cooker 3 are disposed on the other side, and a second pressure ga mechanism 2 and an electric motor 3 are disposed on the other side, respectively.

A first compression mechanism 2, an end plate, an orbiting scroll 4 with an upright wrap formed in a curve close to an involute or an impolist; Discharge port 5
．． Fixed scrolls 7 each having a suction port 6 opened on its outer periphery are meshed with each other with their wraps facing inward.

It was. An Oldham mechanism 9 for preventing rotation of the orbiting scroll 4 is provided between the orbiting scroll 4 and the frame 8 or the fixed scroll 7.
The eccentric shaft 11 ft connected to the scroll 4 is engaged with the eccentric shaft 11, and the orbiting scroll 4 is rotated without rotating due to the rotation of the eccentric shaft 11, compressing the gas in the closed space formed by both scrolls, and converting the EEa gas into It is designed to be discharged from a discharge boat 5. The electric motor 3 has a drive shaft 12
is connected to the main shaft 10 to rotate the main shaft 10. The second compression mechanism 2' and the electric motor 8'
is *g, which is the same as that of the first compressor 2 and the electric motor 8, so the corresponding parts are indicated with a dashed symbol. °Also. 1st compressor 1112 & rotation @ 2 pressure @ machine 111
The non-lap side end plates of 2'U, 5ES/O-Luer, and 7' are arranged to face each other, and a discharge chamber 18 is formed between both compression mechanisms 2, 2'. Said electric motor 8,3
In the sealed chamber 1 in which the motor chambers 14, 14' are arranged
' communicates with the discharge chamber 18 via passages 15, 16'. On the other hand, the suction pipe 16 is provided in the discharge chamber 18 portion and branches into two parts, one branch suction pipe 16a is connected to the suction boat 6 of the fixed scroll 7 of the first compressor 1II2, and the other branch suction pipe 16a is connected to the suction boat 6 of the fixed scroll 7 of the first compressor 1II2. The pipe 16 has a second compression chamber 2'.
It is connected to the suction boat 6' of the fixed scroll 7'. In addition, the discharge pipe 17.17' is connected to each motor chamber 14.14'.
They are set up facing each other. Further, in the center of the discharge chamber 18, a discharge boat 6 of both compression mechanisms 2.2' is provided.
A partition plate 18 for colliding the compressed gas discharged is installed. This partition plate 18 is attached to the inner wall of the sealed chamber 1. Lubricating oil 19 is stored at the bottom of the sealed chamber 1 to supply oil to each bearing of the compression mechanism.

ing.

In addition, in FIG. 3, the center Om of the eccentric shaft 11' of the orbiting scroll of the first compression mechanism 2 and the center Q m' of the eccentric shaft 11' of the orbiting scroll of the second compression mechanism 2' are 18
It is placed at a position shifted by 0'. Δθ−phase angle of the axis, Of indicates the center of the main shaft 10, and ε indicates the turning radius. still,
In FIG. 1, 20, 21, 2o, and 2i are balance weights for canceling the centrifugal force accompanying the orbiting motion of the orbiting scroll 4.4', and the balance weight 20.2
1 and the balance weights 20' and 21' are attached at positions shifted by 180Q.

Next, the operation of this embodiment will be explained.

'Electric motor 8.3' causes the first. When each main shaft 10.10' of the second compression mechanism 2.2' is rotated, the suction gas sucked from the suction pipe 16 into each suction boat 6.6 through the branch suction pipes 16a and 16K is transferred to the orbiting scroll 4.4'. (This compresses the compressed gas from the discharge boat 5.5
' is discharged into the discharge chamber 18. Compressed gas is discharged from the discharge chamber 18
When the compressed gas is discharged to the partition plate 18, the compressed gas collides with the partition plate 18 and separates the six oils contained in the gas. The oil falls into the oil sump below.

The compressed gas from which the oil has been separated flows through passages 15.15 into the respective motor chambers 14.14', where the oil is further separated and then sent out of the machine through discharge pipes 17.17. Arrows in the figure indicate the direction of gas flow.

As described above, by driving the first compression mechanism 2 and the second compression mechanism 2', the discharge capacity of the compressor as a whole increases.

In addition, only the first compressor groove 2 is driven, and the second compression mechanism 2''
If this is stopped, the discharge capacity of the compressor as a whole will be reduced by half.

In addition, when capacity control is performed, the center Qm of the eccentric shaft 11 for driving the orbiting scroll of the first compression mechanism 2 and the eccentricity for driving the orbiting scroll of the second compression mechanism 2'.

Since the centers Om' of the core shafts 11'' are located at positions deviated from each other by 180 degrees, torque fluctuations are suppressed and vibrations and noises are reduced.In other words, it is possible to achieve low vibrations and low noises during capacity control. It becomes possible.

In the above embodiment, when the first compressor groove 2 is driven and the second compression mechanism 2 is stopped, the inside of the first branch suction pipe 16 becomes a high pressure section, and the high pressure gas passes through the branch suction pipe 16a to the first compression mechanism. Since it may flow to the low pressure side of No. 2, it is recommended to provide a check valve. FIGS. 4 and 6 show an example of a check valve. This check valve 22 includes a connection port 24 of the suction pipe 16, a connection port 25 of the branch suction pipe 161L,
a valve body 28 having a connection port 26 for the branch suction pipe 16a;
The valve body 28 includes a valve body 27 which is housed in the valve body 28 and which opens and closes the connection ports 25 and 26, and a spring 28 which biases the valve body 27 in the direction of the connection closing force. The connection port 26 is provided below the connection port 25. Further, the front side and the back side of the valve body 27 are communicated with each other through a pressure equalizing passage 29 provided in the valve body 28. And the first compressor purchase 2
, when the second compression mechanism 2 is driven at the same time, the suction pipe 1
The flow of suction gas in 6 pushes the valve body 27 downward against the spring 28, opening the connection port 25,26.

Further, when the first compression mechanism 2 is driven and the second compressor groove 2 is stopped, the valve body 27 opens the connection port 25 as shown in FIG.
In addition, the connection port 26 is moved to the position where it is closed. This prevents the high pressure gas from flowing into the branch suction pipe 16a on the low pressure side even if the pressure inside the branch suction pipe 16I becomes high. The behavior of the valve body 27 is stabilized by the pressure equalizing passage 29.

6 and 7 show an embodiment of the pond of the present invention, which differs from the first embodiment in that two partition plates 81.
i32 and the inner wall of the closed chamber 1, and
A low pressure chamber 30 communicating with g16 is formed, while a low pressure chamber 8
0 Outer discharge chamber 181 is connected to the flow through a vibrator 88, and a liquid reservoir 3 of the liquid separated from the gas is placed in the low pressure chamber 800F.
4, and the oil pools on the outside of the low pressure chamber 30 are connected to each other by an oil equalizing pipe 85 (this is the point).

This embodiment also achieves the same functions and effects as described above, as well as the following effects.

That is, the suction gas sent from the suction pipe 16 flows into the low pressure chamber 80, where the gas flow rate is reduced and the liquid contained in the gas is separated, so that the first compression @ mechanism 2. It is possible to prevent the liquid from returning to the second groove 2.

(Effects of the Investigation) As described above, according to the present invention, even if capacity control is performed, torque fluctuations can be suppressed, and low vibration and low noise can be achieved.

[Brief explanation of the drawing]

1 to 8 show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a horizontal scroll compressor according to the present invention, and FIG.
The figure is a sectional view taken along the line II-II in Figure 1, and Figure 8 is the position of the eccentric shaft for driving the orbiting scroll of the first compression mechanism and the eccentric shaft for driving the orbiting scroll of the second compression mechanism in Figure 1. 4 is a broken cross-sectional view of the backlight prevention valve, FIG. 5 is a side sectional view thereof, FIG. 6 is a vertical sectional view showing another embodiment of the present invention, and FIG. 7 is FIG. It is a perspective view of the lower royal part in . 1... Sealed chamber 2... First pressure Ia machine l
2'...Second compression mechanism 8.8'...Electric motor
4,4'...orbital scroll? , 7'... Fixed scroll 10.10'... Main shaft 11.1
1... Eccentric shaft 18... Discharge chamber 16... Suction pipe 16a, 16... Branch suction pipe 17.1
7'...Discharge pipe 18...Partition plate 22...
Backflow prevention valve 28...Valve body 24.25.26...
・Inkstone opening 27... Valve body 28... Spring 2
9... Equal pressure passage 80... Low royal, 81.32.
...Partition plate 38...Pipe 84...Liquid pool 35...Oil equalizing pipe 9m% Qm...Center of eccentric shaft Δ...Phase angle Of...Center of main shaft ε...Turning radius Agent Patent Attorney Katsuo Ogawa f1'' 2 otsuzz...average 5 wisdom defense tode z3...ben 4 banirin, zt,, zb...kisha zokuguchi z7...hai Ato 2δ ...11′ book z9...Scorched straight hoof

Claims (4)

[Claims] 1. A first compression mechanism, which is a combination of an orbiting scroll having a spiral wrap and a fixed scroll, and a first electric motor that drives a main shaft connected to the orbiting scroll are disposed in one side of the closed chamber, and On the other hand, a second compression mechanism that combines an orbiting scroll with a spiral wrap and a fixed scroll, and a second electric motor that drives a main shaft connected to the orbiting scroll are installed. While the wrap side mirror plates are arranged to face each other, the center of the eccentric shaft that drives the orbiting scroll of the first compression mechanism and the center of the eccentric shaft that drives the orbiting scroll of the second compression mechanism are offset by 180 degrees from each other. 1. A horizontal scroll compressor, characterized in that the horizontal scroll compressor is disposed at a position such that both compression mechanisms discharge gas compressed into a closed chamber to create a high temperature and high pressure atmosphere in the closed chamber. 2. Claim 1, wherein a compressed gas discharge chamber is formed between the first compression mechanism and the second compression mechanism, and a partition plate for compressed gas collision is arranged in the center of the discharge chamber. Horizontal scroll compressor. 3. The horizontal scroll compressor according to claim 1, wherein gas is sucked into the first compression mechanism and the second compression mechanism through a check valve. 4. A discharge chamber for compressed gas is formed between the first compression mechanism and the second compression mechanism, and a low pressure chamber is formed inside the discharge chamber to which suction gas is guided, and the discharge chamber is formed between the first compression mechanism and the second compression mechanism. 2. The horizontal scroll compressor according to claim 1, wherein gas is sucked through the low pressure chamber.