JPH0521195U - Scroll fluid machinery - Google Patents

Abstract

(57) [Summary] [Object] The present invention achieves a scroll fluid machine including a driving scroll and a driven scroll in which a pair of scrolls co-rotate with each other without reducing the overall thickness of the device and reducing the number of parts. At the same time, it is an object of the present invention to provide a scroll fluid machine capable of efficiently cooling the scroll, thereby achieving a compact size and high compression efficiency. [Configuration] As shown in FIG. 1, a pair of scrolls 1, 2
In order to perform the rotational movement, the fan blades 10 are integrally and radially formed on the rear surface of the scrolls 1 and 2 opposite to the wraps 1a and 2a fitting surfaces, respectively. It is possible to easily cool the scroll without providing a fan.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a scroll fluid machine that functions as a compressor, an expander, and a vacuum pump, and more particularly to a scroll fluid machine that includes a driving scroll and a driven scroll in which a pair of scrolls co-rotate.

[0002]

[Prior Art]

 Conventionally, a fixed scroll in which a first spiral wrap is formed in a casing surrounded by a peripheral wall, and a suction port (discharge port) and a discharge port (suction port) are provided in the peripheral wall and the central region, respectively, An orbiting scroll having a spiral second wrap that can be fitted in the first wrap, and rotatably supported by the casing. One end extends to the motor rotation shaft and the other end extends to the crank shaft and the drive shaft. By revolving the orbiting scroll without rotating, the gas introduced into the casing through the suction port is taken into a closed space formed between the first and second wraps, while the orbiting scroll is being rotated. The fixed / swivel type disk is configured so that the volume of the high-pressure gas can be discharged to the outside through the discharge port while gradually decreasing (expanding) its volume with the orbital motion of the vehicle and moving / compressing toward the center. Lumpur compressor or expander is known. (Jitsuko Sho 63-43 427 and others)

Further, similarly to the above, a pair of scrolls in which spiral wraps are fitted to each other are provided, and the one scroll is a drive scroll in which it is directly connected to a motor or other drive source. The scroll is a driven scroll that rotates following the driving scroll, and the driven scroll is rotated synchronously by the rotation of the driving scroll, so that the scroll can revolve without relative rotation between the scrolls. Lefluid machines are also known. (JP-A-2-204692, etc.)

[0004]

[Problems to be solved by the device]

 Now, in all of the scroll fluid machines, only a cooling method in which a radiation fin is provided in the casing is adopted, which hinders miniaturization of the fluid machine or conversely high load. In particular, in a scroll compressor, the increase in the compression heat of the suction gas due to the higher output leads to a higher temperature of the compressor, and the thermal expansion of each scroll member due to the temperature difference is taken into consideration, and the space between the wraps is increased. Measures are taken to prevent excessive frictional contact by providing clearance. However, if the clearance is taken too large, the low compression efficiency at the initial stage of operation has been an unavoidable drawback.

Therefore, in order to improve the cooling efficiency in the device having the above-mentioned structure, a device having a structure in which a cooling fan is attached to the main shaft transmitting the driving force to the scroll or the rotary shaft side of the motor to cool the scroll However, if such a structure is adopted, a space for mounting the fan must be provided between the motor and the scroll, which inevitably increases the overall thickness of the device and increases the number of parts. The axial distance between the motor and scroll becomes longer, which leads to an increase in torsion torque.

In view of the drawbacks of the prior art, the present invention makes it possible to efficiently cool the scroll without increasing the thickness of the entire device and achieving a reduction in the number of parts, thereby achieving a small size and high compression. An object is to provide a scroll fluid machine that can achieve efficiency improvement.

[0007]

[Means for solving the problem]

 The present invention comprises a pair of scrolls in which spiral wraps formed on a plane orthogonal to a rotation axis are fitted to each other, and the pair of scrolls are a scroll composed of a driving scroll and a driven scroll that rotate together. In the fluid machine, fan blades are integrally formed on the back side of the scroll.

[0008]

[Action]

 For example, the specific structure will be described based on the full-system rotary scroll compressor shown in FIG. 1. 1 is a drive scroll connected to a motor shaft 11, and 2 is a driven scroll in which wraps are fitted together. In the scroll, the driven scroll 2 revolves synchronously with the rotation of the drive scroll 1 and revolves without relatively rotating between the scrolls 1 and 2, so that the suction port 3 provided on the outer diameter side causes the rotation of the driven scroll 2. While introducing gas into the enclosed space formed between the wraps 1a and 2a, the volume of the scrolls 1 and 2 is gradually reduced (expanded) by the relative orbital motion of the scrolls 1 and 2 and moved and compressed toward the center. The high-pressure gas can be discharged to the outside through the discharge port 4 in the central area.

According to such a technique, since the pair of scrolls 1 and 2 both perform rotational movement, the fans are provided on the rear surface of the respective scrolls 1 and 2 located on the opposite side of the wraps 1a and 2a fitting surfaces. By integrally forming the blades 10 radially, the scroll can be easily cooled without providing an independent fan. In this case, it is preferable to use a sirocco fan in which cooling air flows from the center to the outside, but the fan is not limited thereto.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the constituent parts described in this embodiment are not intended to limit the scope of the present invention to them, but are simple. It's just an example.

FIG. 2 shows a sectional structure of a scroll compressor according to an embodiment of the present invention. The scroll compressor is opposed to the drive scroll 1 connected to the motor shaft 11 as described above, and the wraps 1a and 2a are fitted to each other with the axis of the drive scroll 1 slightly displaced. It has driven scrolls 2 arranged, and both scrolls oscillate on a plane orthogonal to the axis through three pairs of revolution mechanisms 12 arranged at their peripheral edges, offset by 120 ° in the circumferential direction. By movably connecting the driven scroll 2, the driven scroll 2 revolves around the driven scroll 1 while the driven scroll 2 rotates synchronously with the rotation of the drive scroll 1.

On the other hand, a fan blade 10 is arranged on the back surface of each of the scrolls 1 and 2 opposite to the lap forming surface.

The blades 10 are arranged radially on the back side of the scrolls 1 and 2 toward the outer peripheral side of the scrolls.

Reference numerals 5 and 6 are a drive scroll case that rotatably supports the drive scroll 1 and the driven scroll 2 via bearings 17 and 18, and a driven scroll case, both of which are clamp rings arranged on the outer peripheral side thereof. It is held integrally by 15 and nut 16. Further, windows 6a and 6b are formed on the end surface 18 on the center side and the outer peripheral side of the driven scroll case 6, respectively. As a result, the cooling air introduced into the blade 10 through the window 6a causes the back wall of the scroll 2 to move. After the scroll 2 is cooled along the line, the scroll 2 can be discharged to the outside through the window 6b of the driven scroll case 6. On the other hand, a window portion 5b is formed at a position facing the outer peripheral side of the blade 10 of the drive scroll case 5, and as a result, the window portion 5a opened to the holding space side of the motor 20 is introduced into the blade 10. After the cooling air has cooled the scroll 1 along the back wall of the scroll 1, it can be discharged to the outside through the window 5b of the drive scroll case 5. A suction port 3 is provided on the outer circumference of the clamp ring 15 through the drive scroll case 5 to the outer circumference of the wrap 1a in the drive scroll 1, and the axis of the driven scroll 2 is inserted through the center of the driven scroll case. The discharge ports 4 reaching the central region of the wrap 2a are provided respectively. As a result, while taking gas from the suction port 3 into the closed space formed between the wraps 1a and 2a, the volume of the scrolls 1 and 2 gradually decreases due to the relative orbital movement of the scrolls 1 and 2 toward the center. It is configured so that it can be moved and compressed, and the high-pressure gas can be discharged to the outside through the discharge port 4 in the central region. Therefore, according to such an embodiment, the scroll can be cooled easily without smoothing compression and without providing an independent fan.

[0015]

【effect】

 As described above, according to the present invention, it is possible to efficiently cool the scroll without increasing the thickness of the entire device and reducing the number of parts, thereby achieving high compression efficiency even with a small size. A scroll fluid machine can be provided. It has various remarkable effects.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention, (A) is a front view,
(B) is a side view

FIG. 2 is a sectional view showing a configuration of a scroll compressor according to an embodiment of the present invention.

[Explanation of symbols]

 1 Drive scroll 2 Driven scroll 10 Blade 3 Discharge port 4 Suction port

Claims (1)

[Scope of utility model registration request] 1. A scroll comprising a pair of scrolls in which spiral wraps formed on a surface orthogonal to a rotation axis are fitted to each other, and the pair of scrolls are a driving scroll and a driven scroll in which the scrolls cooperate with each other. In the fluid machine, a scroll fluid machine characterized in that fan blades are integrally formed on the back side of the scroll.