JP4191339B2 - Scroll type fluid machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scroll type fluid machine, and in particular, a scroll type fluid capable of reducing not only the discontinuous meshing impact at the time of scroll meshing but also the generation of noise and the like due to the rigidity change accompanying meshing. It relates to machinery.
[0002]
[Prior art]
Scroll type fluid machines are increasingly used as compressors for air conditioning and refrigeration because they can operate with high efficiency and low noise. In general, this type of scroll compressor is obtained by meshing a pair of scrolls each including an end plate and a spiral wrap erected on the inner surface thereof. As shown in FIG. 19, the end plate 11 of the fixed scroll 1 is integrally provided with a spiral fixed wrap 12 formed in an involute curve with a constant height and thickness. Further, as shown in FIG. 20, the end plate 21 of the orbiting scroll 2 is integrally provided with a spiral orbiting wrap 22 formed in an involute curve with a constant height and thickness. Both scrolls 1 and 2 are adapted to mesh with both laps 12 and 22 facing each other.
[0003]
15-18 is explanatory drawing which looked at the compression effect | action by the fixed scroll 1 and the turning scroll 2 meshed | engaged as mentioned above from the turning scroll 2 side. In this figure, the orbiting wrap 22 makes a swiveling motion with respect to the fixed lap 12 in the order of FIG. 15 → FIG. 16 → FIG. 17 → FIG. In the figure, reference numerals 3a, 3b, 3c, 3d, 4a, 4b, 4c, and 4d denote sealed spaces, and these sealed spaces gradually increase in volume while moving from a suction port (not shown) to a discharge port 5 provided at the center as a compression chamber. To reduce the compression work.
[0004]
[Problems to be solved by the invention]
In the conventional scroll type fluid machine, when the turning motion of the orbiting scroll 2 advances from the state of FIG. 18 to the state of FIG. 15, the ventral side (inner side) involute end point of the orbiting wrap 22 that has been opened and the fixed wrap 12 The dorsal side (outside) hits. When this contact point is referred to as a suction cutoff point S1, the wraps 12 and 22 are brought into a pressure contact state at the suction cutoff point S1, and the inflow of the suction refrigerant gas is closed to form the compression chamber 3a. The end point of the side involute and the back side of the orbiting wrap 22 come into contact with each other, and the contact point also becomes the suction cutoff point S2, and the compression chamber 4a is formed similarly. Thereafter, the swivel movement of the swirl wrap 22 proceeds in the order of FIG. 15 → FIG. 16 → FIG. 17 → FIG. 18 → FIG. 15, but the two contact points do not leave during that time, and the compression chamber is maintained while maintaining the contact state. 3 and 4 move to the center while gradually reducing the volume and compress the refrigerant gas.
[0005]
However, as described above, there is a discontinuous point such as a meshing start point (first suction cutoff point) in the meshing of both wraps 12 and 22. Since the rigidity of the wraps 12 and 22 changes suddenly and the contact force between the surfaces of the wraps 12 and 22 changes discontinuously, there is a problem that noise vibration increases. Further, if the engagement start point is displaced to the contact side due to a machining error during machining, there is a problem that the contact becomes abrupt and shocking vibration and noise are generated.
[0006]
In order to solve this problem, as shown in FIGS. 21 and 22, the wrap around the contact start point of the outermost peripheral portion of the fixed lap 12 and the orbiting wrap 22 and the contact end point of the innermost peripheral portion (not shown) is slanted. Some of the above-described problems have been improved by providing notches 13 and 23 having sides (for example, Japanese Patent Application Laid-Open No. 7-217559 (Japanese Patent Application No. 6-12598) See the official gazette).
[0007]
FIG. 23 shows the case where the notches 13 and 23 are not provided (in the case of FIGS. 19 and 20), and FIG. 24 shows the case where the notches 13 and 23 are provided (in the case of FIGS. 21 and 22). It is a graph which shows the rigidity change of. Here, in each graph, when the orbiting scroll 2 rotates, the position of the contact point between the orbiting lap 22 and the fixed wrap 12 changes (moves inward) according to the rotation angle (horizontal axis). Shows a state in which the rigidity (vertical axis) at the contact point changes. The change in rigidity is shown because the change in rigidity, that is, the change in contact rigidity that affects the acting force between the fixed scroll 1 and the orbiting scroll 2 greatly affects the behavior, noise, and vibration of the scroll. It is. Specifically, if the change in rigidity (including the magnitude of the head) is large, noise and vibration increase.
[0008]
As shown in FIG. 26, when one lap is in contact with the other wrap at the rotational angle θ, as shown in FIG. appear. The contact point of the lap contacted at the outermost peripheral portion gradually moves inward, and as shown in FIG. 27, the smaller the curvature radius of the lap, the smaller the displacement ΔX, and the greater the rigidity. As shown in the graph, the graph line is inclined obliquely upward. When the contact point is released at point B in FIG. 26, for example, the line changes with a drop due to a rapid decrease in rigidity, as shown in FIG.
[0009]
In addition, when the first contact point is rotated once and reaches one inner side (one cycle of FIGS. 15 to 18 is completed), a new contact point is generated again on the outermost side. Since there are a plurality of contact points on both laps, this results in a graph in which a plurality of lines indicating the contact points overlap as shown in the lower half of FIG. 23 (single wrap rigidity). Therefore, the change in rigidity that greatly affects the behavior, noise, and vibration of the scroll is the sum of changes in rigidity at a plurality of contact points (shown as the overall lap rigidity in the upper half of the graph). The graph shown is a major factor in determining the scroll characteristics.
[0010]
Here, when the notches 13 and 23 are not provided as described above, the graph showing the overall lap rigidity in FIG. 23 rises sharply at the A portion and falls sharply at the B portion, but the notched portions 13 and 23. 24, the graph showing the overall lap rigidity in FIG. 24 is slightly smooth in both the A part and the B part, and is improved as long as it is. However, abrupt contact that is increased due to a processing error or the like can be avoided by the countermeasures as described above, but there is a problem that it is impossible to improve a state in which the rigidity change is disadvantageous in terms of vibration and noise as described above. .
[0011]
On the other hand, as disclosed in JP-A-8-61268, there is one in which the effective contact winding number of the fixed scroll 1 and the orbiting scroll 2 is set to an integral multiple. With this configuration, the stiffness change at the contact start point and the contact end point is canceled as shown in FIG. 25, and the stiffness change twice in one rotation shown as the total lap stiffness in FIGS. As shown in FIG. 25, the change in rigidity is reduced by one change in one rotation, but the amount of change is also small. There is a problem that causes such as. Accordingly, the present invention provides a scroll type fluid machine that can reduce vibration and noise due to changes in rigidity.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention described in claim 1 is characterized in that each end plate (for example, the end plates 11 and 21 in the embodiment) has a spiral wrap (for example, the fixed wrap 12 and the orbiting wrap 22 in the embodiment). The fixed scroll (for example, the fixed scroll 1 in the embodiment) and the orbiting scroll (for example, the orbiting scroll 2 in the embodiment) engaged with each other so that the orbiting scroll does not rotate with respect to the fixed scroll. In the scroll type fluid machine that compresses gas by rotating motion, the wrap inner surface curve is used as a reference in the vicinity of the scroll start point that includes at least one of the fixed scroll and the swing scroll and includes the scroll contact start point at the outermost periphery. A relief (e.g., a wrap 24 in the embodiment) that runs smoothly away from the curve or A lap inner surface curve is provided on the outer side from the reference curve near the scroll end point including the scroll contact end point of the innermost peripheral portion while providing a notch portion (for example, the notch portions 13 and 23 in the embodiment) having an inner side. A relief part that smoothly escapes (for example, the wrap 24 in the embodiment) or a notch part having an oblique side (for example, the notch parts 15 and 25 in the embodiment) is provided, and the relief part or the notch part on the outermost peripheral part is provided. A rotation angle range (for example, the set rotation angle range θ1 in the embodiment) and a rotation angle range in which the relief portion or the cutout portion of the innermost peripheral portion is provided (for example, the set rotation angle range in the embodiment). It is characterized in that θ2) is partially overlapped.
By configuring in this way, in the overlapping part of the rotation angle range provided with the relief part or notch part of the outermost peripheral part and the rotation angle range provided with the relief part or notch part of the innermost peripheral part. It is possible to partially cancel the increase in rigidity in the vicinity of the scroll contact start point and the decrease in rigidity in the vicinity of the scroll contact end point.
[0013]
According to the second aspect of the present invention, the fixed scroll and the orbiting scroll in which the spiral wraps are erected on each end plate are meshed with each other, and the orbiting scroll performs the orbiting motion so as not to rotate with respect to the fixed scroll. In the scroll type fluid machine for compressing gas, the wrap inner surface curve is located outside the reference curve near the scroll start point including at least one of the fixed scroll and the orbiting scroll and including the scroll contact start point at the outermost peripheral portion. An escape portion that smoothly escapes from the reference curve to the outer side of the wrap inner surface curve near the scroll end point including a scroll contact end point at the innermost peripheral portion and a relief portion that smoothly escapes or a notch portion having an oblique side A rotation provided with a notch having an oblique side and provided with the above-mentioned relief or notch on the outermost periphery. And ranges, characterized in that the rotation angle range of the relief portion or notch portion of the innermost portion is provided matches.
By configuring in this way, the rotation angle range provided with the relief portion or the cutout portion of the outermost peripheral portion and the rotation angle range provided with the relief portion or the cutout portion of the innermost peripheral portion are matched. Thus, it is possible to completely cancel the increase in rigidity near the scroll contact start point and the decrease in rigidity near the scroll contact end point.
[0014]
Claim 3 In the invention described in the above, the fixed scroll and the orbiting scroll in which the spiral wraps are erected on each end plate are meshed with each other, and the orbiting scroll does not rotate with respect to the fixed scroll. In a scroll type fluid machine that compresses gas, at least one of the fixed scroll and the orbiting scroll, and the lap inner surface curve is smoothed outward from the reference curve in the vicinity of the scroll start point including the scroll contact start point at the outermost peripheral portion. A relief part or an oblique side that provides a relief part that escapes or a notch part having an oblique side, and that smoothly escapes the wrap inner surface curve outward from the reference curve near the scroll end point including the scroll contact end point of the innermost peripheral part. A rotation angle range in which the above-mentioned relief part or notch part on the outermost peripheral part is provided. Wherein the rotational angle range of the relief portion or notch portion of the innermost portion is provided are both set to an integer wound minutes.
By configuring in this way, the start point and end point of the portion where the rigidity is increased and the portion where the rigidity is decreased are made coincident with each other, the generation of the peak portion that occurs when the two overlap each other is suppressed as much as possible, and the summation of the rigidity is smoothed. It becomes possible.
[0015]
Claim 4 In the invention described in the above, the rotation angle range in which the escape portion or the cutout portion of the outermost peripheral portion or the innermost peripheral portion is not provided (for example, the set rotation angle range θ3 in the embodiment) is set to an integer number of windings. It is characterized by.
With this configuration, the start point and end point of the portion with increased rigidity and lower portion of rigidity are made to coincide with each other, and the start point and end point are made to coincide with each other in a portion where no relief portion or notch portion is provided. Further, it is possible to suppress the generation of the peak portion that occurs when the start point and the end point overlap with each other and to smooth the rigidity sum.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 are perspective views showing basic structures of the fixed scroll 1 and the orbiting scroll 2 according to the first embodiment of the present invention. As shown in FIG. 1, a fixed wrap 12 is erected on the end plate 11 of the fixed scroll 1 and has slanted sides in the lap curve near the contact start point of the outermost periphery and the contact end point of the innermost periphery. Notches 13 and 15 are provided.
[0017]
On the other hand, as shown in FIG. 2, an orbiting wrap 22 is erected on the end plate 21 of the orbiting scroll 2, and an oblique side is added to the lap curve near the contact start point of the outermost peripheral portion and the contact end point of the innermost peripheral portion. The notch parts 23 and 25 which have are provided. The cutout portions 13 and 15 and the cutout portions 23 and 25 are formed over a set rotational angle range as will be described later with the orbiting scroll 2 as an example. 1 and 2 are illustrated in a state where the formation range is minimized in order to make the shape of the notch easy to understand.
[0018]
3 and 4 show the details of the notch portions provided in the fixed scroll 1 and the orbiting scroll 2. As shown in FIG. 3, a portion between the end of the abdomen involute of the fixed wrap 12 and the site X is formed with a notch 13 having an oblique side. Further, as shown in FIG. 4, a portion from the ventral involute end point of the swirl wrap 22 to the site Y is also formed with a notch 23 having an oblique side. Here, instead of the notches 13 and 23 having the oblique sides, as shown in FIG. 5, the involute curve (reference curve which is the inner peripheral surface before processing) was cut away so as to smoothly escape to the outside. A curved wrap 24 may be used (the same applies to the following embodiments). Although FIG. 5 described the orbiting scroll 2, the same applies to the fixed scroll 1, and a curved lap 24 that smoothly escapes from the involute curve to the outside from the portion Y ′ to the ventral involute end point may be used.
[0019]
And the said notch parts 13 and 15 and the notch parts 23 and 25 are set in the range which demonstrates the turning scroll 2 to FIG. 6 as an example (same in each following embodiment). That is, the set rotation angle range θ1 of the notch 23 (13) provided in the lap curve near the contact start point in the outermost periphery and the notch 25 provided in the lap curve near the contact end point in the innermost periphery. The set rotation angle range θ2 in (15) is set partially overlapping. In each of the above ranges, the oblique side of the notch 23 (13) is gradually inclined. Further, when setting the notches 23 and 13 (the same applies to the wrap 24), it is a matter of course that they are formed to a depth that does not affect the efficiency.
[0020]
Therefore, in this embodiment, the cutout portions 13, 15, 23, and 25 are basically provided, so that the change in the overall lap rigidity due to the meshing of both laps and the release of the meshing is smoothed and suddenly contacted. Therefore, the contact force between the wraps can be changed smoothly, and noise and vibration caused by changes in the tooth surface rigidity at each contact portion can be prevented. Moreover, since the installation range of the notches 23 and 25 (13 and 15) or the curved wrap 24 is set as described above, noise and vibration can be further reduced. That is, as shown by the broken line in FIG. 7, compared to the case where the above-described overlapping portion is not set, the rigidity is lowered due to the setting of the overlapping portion (for example, a portion). Part of the part (for example, part b) cancels out, and the peak of the sum of the change in rigidity can be reduced as shown by the solid line in the figure.
[0021]
8 and 9 are explanatory views corresponding to FIGS. 6 and 7 of the second embodiment of the present invention. This embodiment includes notches or curved wraps as in the previous embodiment, but differs in the installation range. The above installation range will be described by taking as an example the case in which the orbiting scroll 2 of FIG. 8 is provided with the notches 23 and 25. The notch 23 (13) provided on the lap curve near the contact start point of the outermost periphery is described. The set rotation angle range θ1 and the set rotation angle range θ2 of the notch 25 (15) provided in the lap curve near the contact end point of the innermost peripheral portion are set to completely coincide.
[0022]
Therefore, in this embodiment as well, by providing the notches 13, 15, 23, and 25, the overall lap rigidity change due to the engagement and release of both laps is smoothed and suddenly contacted. Therefore, the contact force between the wraps can be changed smoothly, and noise and vibration caused by changes in the tooth surface rigidity can be prevented. Moreover, since the installation range of the notches 23 and 25 (13 and 15) or the curved wrap 24 is set as described above, noise and vibration can be further reduced. That is, as shown by a broken line in FIG. 9, a rigidity increasing portion (for example, c portion) near the contact start point of the outermost peripheral portion and a rigidity decreasing portion (for example, near the contact end point of the innermost peripheral portion) d portion) is completely canceled out, and the sum of the rigidity changes in this portion is further smoothed as compared with the case where the sum is partially overlapped as shown by the broken line.
[0023]
10 and 11 show the present invention. Reference example It is explanatory drawing corresponding to FIG. 6, FIG. This reference example Similarly to the above-described embodiments, it has a notch or a curved wrap. And This reference example The following relationship is set in the installation range of the notch or the curved wrap. This will be specifically described by taking as an example the case where the cutout portions 23 and 25 are provided in the orbiting scroll 2 of FIG. 10. The cutout portion 23 (13) provided in the lap curve near the contact start point of the outermost peripheral portion. The set rotation angle range θ2 of the notch 25 (15) provided in the lap curve near the contact end point in the innermost peripheral portion is set larger than the set rotation angle range θ1.
[0024]
Therefore, This reference example However, by providing the notches 13, 15, 23, and 25, the overall lap rigidity changes due to the meshing of both laps and the disengagement of the laps, and the contact is suddenly made and the tooth surface is detached. Therefore, the contact force between the wraps can be changed smoothly, and noise and vibration caused by changes in the tooth surface rigidity can be prevented. Also, the vicinity of the contact end point of the innermost peripheral part has a large rigidity because the radius of curvature of the lap is smaller than that of the vicinity of the contact start point of the outermost peripheral part, and the degree (inclination) of the decrease in rigidity when the tooth surface is detached. Is larger than the set rotation angle range θ1 of the notch 23 (13) provided in the lap curve near the contact start point of the outermost peripheral part, but is provided in the lap curve near the contact end point of the innermost peripheral part. Since the set rotation angle range θ2 of the notch 25 (15) is set to be large, it is possible to further reduce the decrease in rigidity at the innermost periphery. As a result, the smoothing of the rigidity can be promoted as much as the process of decreasing the rigidity in the vicinity of the contact end point of the innermost peripheral portion can be moderated.
[0025]
As specifically shown in FIG. 11, the set rotation angle range θ1 of the notch 23 (13) provided in the lap curve near the contact start point of the outermost peripheral portion and the lap near the contact end point of the innermost peripheral portion. Noise and vibration can be reduced compared to the case where the set rotation angle range θ2 of the notch 25 (15) provided on the curve is set to be the same. That is, as shown by the broken line in FIG. 11, the slope of the rigidity-reduced portion (for example, the e portion) near the contact end point of the innermost peripheral portion becomes gentler than that when no countermeasure is taken. Therefore, it is possible to contribute to the smoothing of the sum of the rigidity changes.
[0026]
12 and 13 show the first aspect of the present invention. 3 It is explanatory drawing corresponding to FIG. 6, FIG. 7 of embodiment. This embodiment is provided with a notch or a curved wrap as in the above-described embodiment, but has a feature in its installation range. The above installation range will be described by taking as an example the case where a notch is provided in the orbiting scroll 2 of FIG. 12. The set rotation angle of the notch 23 (13) provided on the lap curve near the contact start point of the outermost peripheral part. In this embodiment, the range θ1 and the set rotation angle range θ2 of the notch 25 (15) provided in the lap curve near the contact end point of the innermost peripheral portion are both equal to an integral number of turns (360 ° × N). Is set for one rotation. In other words, the start point and end point near the contact end point of the outermost peripheral part, which is the increased rigidity part, coincide with each other, and the start point and end point near the contact start point of the innermost peripheral part, which is the decreased rigidity part And the occurrence of a peak portion that occurs when the start point and the end point overlap each other is suppressed as much as possible.
[0027]
Therefore, in this embodiment as well, by providing the notches 13, 15, 23, and 25, the overall lap rigidity change due to the engagement and release of both laps is smoothed and suddenly contacted. Therefore, the contact force between the wraps can be changed smoothly, and noise and vibration caused by changes in the tooth surface rigidity can be prevented. Moreover, since the installation range of the notches 23 and 25 (13 and 15) or the curved wrap 24 is set as described above, noise and vibration can be further reduced. That is, as shown in FIG. 13, when looking at a portion f point (end point) where the rigidity is highest in the vicinity of the contact start point of the outermost peripheral portion, the rigidity reaches one peak at this f point. Since the g point (start point) in the vicinity of the contact start point of the outermost peripheral portion to be generated next, which should be added to the point f, has a rigidity of 0, at least in these two relations, And peak points can be minimized. That is, since the g point coincides with the f point, the sum at the h point can be suppressed and the peak at the i point can be suppressed as compared with the case where the f point is in front of the g point.
[0028]
Similarly, when looking at the portion j point (detachment start point) where the rigidity is highest in the vicinity of the contact end point in the innermost peripheral portion, the rigidity reaches one peak at this j point. Since the k point (disengagement end point) in the vicinity of the contact end point of the innermost peripheral portion that occurred one time before should be added to is zero in rigidity, the sum at this part is at least in these two relations , And peak points can be minimized. That is, since the j point coincides with the k point, the sum at the l point can be suppressed and the peak at the m point can be suppressed as compared with the case where the k point is in front of the j point. Therefore, as shown in FIG. 13, the sum of the rigidity changes is further smoothed.
[0029]
And the above 3 In addition to the embodiment, if the set rotation angle range θ3 of a portion not provided with a notch or a curved wrap is set to an integer number of turns, here one rotation (not shown), the outermost peripheral portion The rigidity increase near the contact start point, the rigidity decrease near the contact end point of the innermost peripheral portion, and the rigidity increase in the meshing at the portion where the notch or the like is not provided are completely offset. As shown, the total stiffness change as a whole can be smoothed. In addition, this invention is not restricted to the said embodiment, For example, you may apply only to any one of a turning scroll or a fixed scroll.
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, the rotation angle range in which the relief portion or notch portion of the outermost peripheral portion is provided, and the relief portion or notch portion of the innermost circumference portion are provided. In the overlapping area with the rotation angle range, it is possible to partially cancel the increase in rigidity near the scroll contact start point and the decrease in rigidity near the scroll contact end point. There is an effect that noise and vibration can be reduced by suppressing the overall lap rigidity in the portion.
[0031]
According to the second aspect of the present invention, the rotation angle range in which the relief portion or notch portion in the outermost peripheral portion is provided matches the rotation angle range in which the relief portion or notch portion in the innermost circumference portion is provided. By doing so, it is possible to completely cancel the increase in rigidity near the scroll contact start point and the decrease in rigidity near the scroll contact end point. Therefore, the total rigidity in the rotation angle range is smoothed. There is an effect that noise and vibration can be reduced.
[0032]
Claim 3 According to the invention described in (1), the start point and end point of the portion where the rigidity is increased and the portion where the rigidity is decreased are made coincident with each other, the occurrence of a peak portion that occurs when both overlap each other is suppressed as much as possible, and the summation of the rigidity is smoothed. Therefore, there is an effect that vibration and noise can be reduced.
[0033]
Claim 4 According to the invention described in (4), the start point and end point of the portion where the rigidity is increased and the portion where the rigidity is decreased are made to coincide with each other, and the start point and the end point are made to coincide with each other in the portion where the relief portion or the notch portion is not provided. Because it is possible to minimize the occurrence of the peak portion that occurs when the start point and end point overlap and to smooth the rigidity sum, the rigidity increasing portion and the rigidity decreasing portion overlap. In this case, there is an effect that smoothness of the sum of rigidity proceeds and vibration and noise can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a fixed scroll according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the orbiting scroll according to the first embodiment of the present invention.
FIG. 3 is an enlarged view of a main part of FIG. 1;
4 is an enlarged view of a main part of FIG.
FIG. 5 is a perspective view of a wrap that can be used in place of the notch.
FIG. 6 is a plan view of the orbiting scroll according to the first embodiment of the present invention.
FIG. 7 is a graph showing changes in rigidity according to the first embodiment of the present invention.
FIG. 8 is a plan view of a turning scroll according to a second embodiment of the present invention.
FIG. 9 is a graph showing a change in rigidity according to the second embodiment of the present invention.
FIG. 10 shows the present invention. Reference example It is a top view of the orbiting scroll.
FIG. 11 shows the present invention. Reference example It is a graph which shows the rigidity change of.
FIG. 12 is a diagram of the invention 3 It is a top view of the turning scroll of embodiment.
FIG. 13 is a diagram of the invention 3 It is a graph which shows the rigidity change of embodiment.
FIG. 14 shows the first of the present invention. 3 It is a graph which shows the other aspect of embodiment.
FIG. 15 is an explanatory view showing a compression action by a fixed scroll and a turning scroll.
FIG. 16 is an explanatory view showing a compression action by a fixed scroll and a turning scroll.
FIG. 17 is an explanatory view showing a compression action by a fixed scroll and a turning scroll.
FIG. 18 is an explanatory diagram showing a compression action by a fixed scroll and a turning scroll.
FIG. 19 is a perspective view of a conventional fixed scroll.
FIG. 20 is a perspective view of a conventional orbiting scroll.
FIG. 21 is a perspective view of another conventional fixed scroll.
FIG. 22 is a perspective view of another conventional orbiting scroll.
FIG. 23 is a graph showing a change in rigidity corresponding to FIGS. 19 and 20;
24 is a graph showing a change in rigidity corresponding to FIGS. 21 and 22. FIG.
FIG. 25 is a graph showing a change in rigidity of still another conventional technique.
FIG. 26 is a partially enlarged perspective view of a wrap.
27 is a cross-sectional view of a portion A in FIG. 26. FIG.
FIG. 28 is a graph showing a change in rigidity from A part to B part in FIG.
[Explanation of symbols]
1 Fixed scroll
2 Orbiting scroll
11, 21 End plate
12 Fixed wrap
13, 15, 23, 25 Notch
22 Turning lap
24 lap (relief part)
S1, S2 Suction deadline
θ1, θ2, θ3 Setting rotation angle range (rotation angle range)

Claims (4)

  Scroll type that compresses gas by meshing fixed scroll and orbiting scroll, each of which has a spiral wrap on each end plate, and rotating the orbiting scroll so as not to rotate with respect to the fixed scroll. In the fluid machine, at least one of the fixed scroll and the orbiting scroll, in the vicinity of the scroll start point including the scroll contact start point at the outermost peripheral part, the relief part or the slanting part that smoothly escapes the wrap inner surface curve outward from the reference curve A notch portion having a side and a notch portion having a relief portion or an oblique side for smoothly escaping the inner surface curve of the wrap from the reference curve to the outside near the scroll end point including the scroll contact end point of the innermost peripheral portion. Provided, the rotation angle range in which the relief part or notch part in the outermost peripheral part is provided, and the relief in the innermost peripheral part. Scroll fluid machine in which the to part or rotation angle range notch portion is provided is characterized in that it is set to partially overlap.   Scroll type that compresses gas by meshing fixed scroll and orbiting scroll, each of which has a spiral wrap on each end plate, and rotating the orbiting scroll so as not to rotate with respect to the fixed scroll. In the fluid machine, at least one of the fixed scroll and the orbiting scroll, in the vicinity of the scroll start point including the scroll contact start point at the outermost peripheral part, the relief part or the slanting part that smoothly escapes the wrap inner surface curve outward from the reference curve A notch portion having a side and a notch portion having a relief portion or an oblique side for smoothly escaping the inner surface curve of the wrap from the reference curve to the outside near the scroll end point including the scroll contact end point of the innermost peripheral portion. Provided, the rotation angle range in which the relief part or notch part in the outermost peripheral part is provided, and the relief in the innermost peripheral part. Scroll fluid machine of the then part or the rotation angle range notch portion is provided, characterized in that match.   Scroll type that compresses gas by meshing fixed scroll and orbiting scroll, each of which has a spiral wrap on each end plate, and rotating the orbiting scroll so as not to rotate with respect to the fixed scroll. In the fluid machine, at least one of the fixed scroll and the orbiting scroll, in the vicinity of the scroll start point including the scroll contact start point at the outermost peripheral part, the relief part or the slanting part that smoothly escapes the wrap inner surface curve outward from the reference curve A notch portion having a side and a notch portion having a relief portion or an oblique side for smoothly escaping the inner surface curve of the wrap from the reference curve to the outside near the scroll end point including the scroll contact end point of the innermost peripheral portion. Provided, the rotation angle range in which the relief part or notch part in the outermost peripheral part is provided, and the relief in the innermost peripheral part. Scroll fluid machine, characterized in that to portions or notches rotational angle range provided are both set to an integer wound minutes.   4. The scroll type fluid machine according to claim 3, wherein a rotation angle range in which no escape portion or notch portion of the outermost peripheral portion or innermost peripheral portion is provided is set to an integral number of windings.

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