JP4064767B2 - Scroll fluid machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scroll fluid machine used as an air compressor, a vacuum pump, a refrigerant gas compressor, a compressor for an oxygen suction machine, or the like.
[0002]
[Prior art]
In the conventional scroll fluid machine, the fixed scroll is provided with a spiral wrap, and the scroll body of the orbiting scroll is provided with a wrap having the same shape as the fixed scroll wrap. Overlapping, a plurality of transformer rooms are formed. Then, when the orbiting scroll is driven eccentrically, the variable pressure chamber formed between the orbiting scroll and the fixed scroll is gradually reduced. Therefore, the gas to be transformed such as air is transformed in the transformation room.
[0003]
[Problems to be solved by the invention]
However, in such a scroll fluid machine, the gap between the orbiting scroll and the fixed scroll wrap becomes non-uniform due to errors in the processing accuracy and assembly accuracy of the orbiting scroll and the fixed scroll. It cannot transform well.
[0004]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a scroll fluid machine that can efficiently transform a fluid to be transformed.
[0005]
[Means for Solving the Problems]
In order to achieve this object, in the present invention, a casing, a stator fixed to the casing, a rotating shaft rotatably supported by the casing, a rotor fixed to the rotating shaft, and the rotating shaft A rotation shaft that is eccentrically supported by the rotation shaft, is provided between the rotation shaft and the casing, and allows rotation of the rotation shaft and prevents rotation of the rotation shaft, and the casing. In a scroll fluid machine having a fixed scroll fixed to the orbit and a orbiting scroll attached to the orbiting shaft, a gap between the orbiting scroll wrap and the fixed scroll wrap is continuously adjusted to the rotation preventing means. Phase adjusting means is provided, and as the rotation preventing means, the rotation axis of the part of the rotation preventing means supported on the turning axis side is provided. Used as to adjust the angle around the core wire, as the rotation preventing means comprises a fixed plate fixed to the orbiting shaft, which is rotatably supported about a center line of the pivot shaft to the fixed plate Between the rotating plate, the elongated hole provided in the fixed plate, the bolt passing through the elongated hole and screwed into the female screw provided in the rotating plate, and between the casing and the rotating plate The one having a provided pin crank is used.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic cross-sectional view showing a scroll fluid machine according to the present invention, FIG. 2 is a cross-sectional view showing a part of the scroll fluid machine shown in FIG. 1, and FIG. As shown in the figure, a stator 2 is fixed to a casing 1, a rotating shaft 4 is rotatably supported on the casing 1 via a bearing 3, a rotor 5 is fixed to the rotating shaft 4, and the stator 2, the rotor 5, etc. A motor is configured. Further, the rotating shaft 8 is rotatably supported by the rotating shaft 4 via the bearings 6 and 7, and the center line of the rotating shaft 4 and the center line of the rotating shaft 8 are deviated. That is, the turning shaft 8 is supported so as to be rotatable eccentrically with respect to the rotating shaft 4. A fixed plate 18 is fixed to the pivot shaft 8, a rotating plate 19 is supported on the fixed plate 18 so as to be rotatable about the center line of the pivot shaft 8, a long hole 20 is provided in the fixed plate 18, and a bolt 21 is attached. It passes through the long hole 20 and is screwed into a female screw provided on the rotating plate 19. Three pin cranks 10 are provided between the casing 1 and the rotating plate 19. The crank body 22 of the pin crank 10 is provided with shafts 23 and 24, and the center line of the shaft 23 and the center line of the shaft 24 are eccentric, and the amount of eccentricity is determined between the center line of the rotating shaft 4 and the pivot shaft 8. Equal to the amount of eccentricity with the center line. The shaft 23 of the pin crank 10 is rotatably supported by the casing 1 via a bearing 25, and the shaft 24 of the pin crank 10 is rotatably supported by the rotating plate 19 via a bearing 26. The rotation prevention means is provided between the turning shaft 8 and the casing 1 by the fixed plate 18, the rotating plate 19, the pin crank 10, etc., and allows eccentric turning of the turning shaft 8 and prevents rotation of the turning shaft 8. 27, and the support point of the shaft 24 of the pin crank 10 by the fixed plate 18, the rotary plate 19, the long hole 20, and the bolt 21 is a circle centered on the center line of the turning shaft 8 with respect to the turning shaft 8. Of the rotation prevention means 27 by adjusting the angle around the center line of the turning shaft 8 of the portion of the rotation prevention means 27 supported on the turning shaft 8 side. Phase adjustment means for adjusting the phase is configured. A fixed scroll 11 is fixed to the casing 1, and the fixed scroll 11 is provided with a spiral wrap. Further, the orbiting scroll 12 is attached to the upper portion of the orbiting shaft 8, and the scroll main body 13 of the orbiting scroll 12 is provided with an upper wrap 14 and a lower wrap 15 having the same shape as the wrap of the fixed scroll 11. 14, The lower wrap 15 and the wrap of the fixed scroll 11 are overlapped, and a plurality of variable pressure chambers are formed. The casing 1, the motor, the rotating shaft 4, the turning shaft 8, the rotation preventing means 27 and the like constitute the eccentric turning drive device 16, and the fluid driven by the fixed scroll 11, the turning scroll 12 and the like by the eccentric turning drive device 16. A machine body 17 is configured. Then, the gap between the orbiting scroll 12 and the fixed scroll 11 is continuously adjusted by the phase adjusting means.
[0007]
In this scroll fluid machine, the rotating shaft 4 and the rotor 5 rotate, and the turning shaft 8 turns eccentrically around the center line of the rotating shaft 4. However, since the rotation preventing means 27 is provided, the turning shaft 8 is Does not rotate. For this reason, since the turning shaft 8 and the turning scroll 12 turn eccentrically without rotating with respect to the casing 1 and the fixed scroll 11, the variable pressure chamber formed between the turning scroll 12 and the fixed scroll 11 is gradually reduced. . Therefore, the gas to be transformed such as air is transformed in the transformation room. Further, if the bolt 21 is loosened, the fixed plate 18 is rotated with respect to the rotating plate 19 , and the bolt 21 is tightened in this state, the center of the turning shaft 8 of the portion supported on the turning shaft 8 side of the rotation preventing means 27 is provided. The phase of the rotation prevention means 27 can be changed by adjusting the angle around the line.
[0008]
In such a scroll fluid machine, the phase of the rotation preventing means 27 is changed by adjusting the angle around the center line of the turning shaft 8 of the part supported on the turning shaft 8 side of the rotation preventing means 27. Therefore, even if there are errors in the processing accuracy and assembly accuracy of the orbiting scroll and fixed scroll, the gap between the orbiting scroll wrap and the fixed scroll wrap can be adjusted uniformly, so that the fluid to be transformed is efficient. Transform well.
[0009]
In the above-described embodiment, the rotation prevention means 27 having the pin crank 10 is used as the rotation prevention means. However, rotation prevention means having an Oldham ring may be used as the rotation prevention means . Further, in the above-described embodiment , the rotation prevention means 27 is provided between the casing 1 and the orbiting shaft 8, but the rotation prevention means may be provided between the eccentric scroll driving device side of the fixed scroll and the orbiting shaft. Good. In this case, a phase adjusting means for adjusting the phase of the rotation preventing means by adjusting the angle around the center line of the turning axis of the portion supported on the turning axis side may be used . In the above-described embodiment, the rotation prevention means 27 is provided between the casing 1 and the orbiting shaft 8, but the opposite side of the fixed scroll to the eccentric orbiting drive device side and the orbiting shaft that penetrates the fixed scroll. An anti-rotation means may be provided between them. In this case, a phase adjusting means for adjusting the phase of the rotation preventing means by adjusting the angle around the center line of the turning axis of the portion supported on the turning axis side may be used .
[0010]
【The invention's effect】
In the scroll fluid machine according to the present invention, since the orbiting rotation preventing means is provided with the phase adjusting means, the gap between the orbiting scroll wrap and the fixed scroll wrap can be adjusted uniformly, so that the fluid to be transformed can be efficiently used. Can be transformed.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a scroll fluid machine according to the present invention.
2 is a cross-sectional view showing a part of the scroll fluid machine shown in FIG. 1. FIG.
FIG. 3 is a view on arrow A in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Fixed scroll 12 ... Revolving scroll 16 ... Eccentric turning drive device 17 ... Fluid machine main body 18 ... Fixed plate 19 ... Rotating plate 20 ... Long hole 21 ... Bolt 27 ... Anti-rotation means

Claims (1)

A casing, a stator fixed to the casing, a rotating shaft rotatably supported on the casing, a rotor fixed to the rotating shaft, a rotating shaft eccentrically supported on the rotating shaft and rotatably supported; A rotation prevention means provided between the orbiting shaft and the casing and allowing eccentric rotation of the orbiting shaft and preventing the orbiting shaft from rotating; a fixed scroll fixed to the casing; and the orbiting shaft. In a scroll fluid machine having an attached orbiting scroll, a phase adjusting means for continuously adjusting a gap between the orbiting scroll wrap and the fixed scroll wrap is provided in the rotation preventing means, and the rotation preventing means includes: used as to adjust the angle about the center line of the pivot axis of the portion to be supported on the pivot axis side of said rotation preventing means
The rotation preventing means includes a fixed plate fixed to the turning shaft, a rotating plate supported on the fixed plate so as to be rotatable around a center line of the turning shaft, and a slot provided in the fixed plate. A bolt penetrating the elongated hole and screwed into a female screw provided on the rotating plate, and a pin crank provided between the casing and the rotating plate. Features a scroll fluid machine.

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