JP2017089551A - Scroll type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll type compressor capable of preventing deformation of a winding end portion of a spiral wall body by centrifugal force as soon as possible.SOLUTION: A scroll type compressor includes a driving scroll member 1 having a plurality of spiral first wall bodies 3 vertically disposed on one side face of an end plate, and a driven scroll member having a spiral second wall body vertically disposed on one side face of the end plate. The first wall bodies 3 are respectively disposed at equal angular intervals around a center O1 of the driving scroll member 1, winding end portions 3b are positioned at an outer peripheral side of the driving scroll member 1, and vertically disposed on one side face of the end plate of the driving scroll member 1, and a first ring portion 6 composed of an endless annular wall body is disposed to fix the winding end portions 3b of the respective first wall bodies 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a scroll compressor.

  A conventional general scroll compressor includes a fixed scroll and a turning scroll, and the turning scroll performs a revolving turning motion with respect to the fixed scroll. In such a scroll compressor, when the rotation speed is increased for miniaturization, the centrifugal force generated in the orbiting scroll increases, and the life of the drive bearing is greatly reduced. When a bearing that can withstand this is employed, the physique becomes large and the structure becomes expensive.

There exists a double-rotation scroll type compressor as what solves such a problem (refer patent document 1). This comprises a driving scroll and a driven scroll that rotates synchronously with the driving scroll, and is driven by offsetting the driven shaft that supports the rotation of the driven scroll by a turning radius with respect to the driving shaft that rotates the driving scroll. The shaft and the driven shaft are rotated in the same direction at the same angular velocity. Thereby, the relative motion between the scrolls becomes a turning motion, and the same compression as that of the scroll compressor having the fixed scroll and the turning scroll described above can be performed.
In this case, if the center of gravity of the scroll coincides with the center of rotation, the centrifugal load does not act on the bearing that supports the scroll, and therefore it is not necessary to employ a large-sized bearing.
In order to realize such a configuration, it is important to make the rotation center of the scroll coincide with the position of the center of gravity.
However, in the conventional scroll shape, since the center of the involute and the center of gravity do not coincide with each other, it is necessary to match the position of the center of gravity with the center of rotation by stealing the end plate. However, in this case, the center and the center of gravity when projected onto a plane orthogonal to the rotation axis coincide with each other, but since they do not coincide with each other in the axial direction, a moment load is generated.

  As a solution to this problem, there is the adoption of a double scroll having a point-symmetric shape with respect to the center of the involute (see Patent Documents 2 and 3). An example in which a double scroll and a double scroll are combined is disclosed in Patent Document 4. However, even if it respond | corresponds so far, a centrifugal force will act on the spiral wrap (wall) of a scroll, and the deformation | transformation by a centrifugal load will generate | occur | produce. In particular, the winding end portion at the outer peripheral end of the scroll has a large support amount as well as a long distance from the center of rotation and a large centrifugal force. When the amount of deformation increases, the lap tilts and fluid leaks from the compression space, reducing the performance of the compressor. This is the reason why the rotation speed of the scroll compressor cannot be increased as much as the turbomachine.

  In Patent Document 5, three spiral wraps are formed at equiangular intervals around the center of each end plate of the fixed scroll and the orbiting scroll, and three pairs of meshing spiral wraps are formed to form three cylinders. A scroll compressor is disclosed.

Japanese Unexamined Patent Publication No. 64-3287 Japanese Patent Laid-Open No. 3-67082 JP 2007-23776 A Japanese Patent No. 4919035 JP 2013-241886 A

  However, in the scroll compressor disclosed in Patent Document 5, the winding end portion of the spiral wrap formed on the orbiting scroll is cut, and the spiral wrap may be deformed by centrifugal force.

  This invention is made in view of such a situation, Comprising: It provides scroll type compressor which can prevent as much as possible the deformation | transformation end part of a spiral wall body with a centrifugal force. Objective.

In order to solve the above problems, the scroll compressor of the present invention employs the following means.
That is, the scroll compressor according to the present invention is provided with a first scroll member having a plurality of spiral first walls standing on one side of the end plate, and on one side of the end plate, The second wall body has a number of spiral second wall bodies corresponding to the first wall body, and each of the second wall bodies meshes with the corresponding first wall body of the first scroll member. A scroll member, and the first scroll member and the second scroll member take in a compression space formed by the first wall body and the second wall body by relatively revolving and revolving. Each of the first wall bodies is disposed at a predetermined angular interval around the center of the first scroll member, and the winding end portion is located on the outer peripheral side of the first scroll member; The second wall body is An endless circle that is disposed around the center of the roll member at a predetermined angular interval, is erected on the one side surface of the end plate of the first scroll member, and to which the winding end portion of each first wall body is fixed It is characterized by comprising a first ring part which is an annular wall.

Each of the first wall bodies arranged at a predetermined angular interval around the center of the end plate of the first scroll member is engaged with the corresponding second wall body of the second scroll member. Thereby, the scroll compressor provided with a plurality of pairs each including one first wall body and one second wall body is configured. And it decided to fix the winding end part of each 1st wall body located in the outer periphery of a 1st scroll member to the 1st ring part erected on one side surface of the end plate of the same 1st scroll member. Since the first ring portion is an endless annular shape, it has high rigidity against centrifugal force. Therefore, the possibility that the winding end portion of each first wall body is deformed and inclined by centrifugal force can be avoided as much as possible, and compression can be performed without leakage.
The “winding end portion” means a final end portion on the radially outer side when a spiral shape is formed from the center side toward the radially outer side.
The “center of the scroll member” means the center when the scroll member is viewed from the wall side, and preferably coincides with the center of gravity of the scroll member.
The “predetermined angle interval” is preferably a substantially equal angle interval in which the angle error with respect to the equal angle interval is ± 10 °, more preferably ± 1 °.
The first scroll member and the second scroll member may be double-rotating scrolls that rotate together, or one is a fixed scroll member (second scroll member) fixed at a fixed position and the other is fixed to the fixed scroll. A turning scroll member (first scroll member) that performs a revolving turning motion may be used.

  Furthermore, in the scroll compressor according to the present invention, a winding start portion of each first wall body is formed so as to extend in a radial direction when viewed from the center of the first scroll member.

By forming the winding start portion of the first wall body so as to extend in the radial direction when viewed from the center of the first scroll member, the wall body exists in the radial direction even if centrifugal force is applied, and the thickness is increased. Therefore, the strength against centrifugal force can be ensured. Thereby, the inclination of a winding start part is prevented as much as possible, and compression can be performed without leakage.
The “winding start portion” means a starting end portion on the center side when a spiral shape is formed from the center side toward the outside in the radial direction.

  Further, in the scroll compressor according to the present invention, each of the second wall bodies has a winding end portion located on an inner peripheral side of the second scroll member, and the one end of the end plate of the second scroll member. A second ring portion is provided which is erected on a side surface and is an endless ring-shaped wall body to which the winding end portion of each second wall body is fixed.

  By positioning the winding end portion of the second wall body on the inner peripheral side of the second scroll member, it is possible to avoid interference with the first wall body and to engage each other. And it decided to suppress the inclination by the centrifugal force in the winding end part of a 2nd wall body by fixing the winding end part of a 2nd wall body to the 2nd ring part made into the endless ring-shaped wall body. Since the end of winding of the second wall is located on the inner peripheral side of the second scroll member, the centrifugal force is not comparatively large. Can be realized.

  Further, the scroll compressor of the present invention is a first scroll member having a plurality of spiral first wall bodies erected on one side surface of the end plate, and erected on one side surface of the end plate, A second scroll having a number of spiral second walls corresponding to the first wall, each of which is meshed with the corresponding first wall of the first scroll member. And the first scroll member and the second scroll member relatively reciprocally swivel, and the fluid taken into the compression space formed by the first wall body and the second wall body. The first wall bodies are arranged at predetermined angular intervals around the center of the first scroll member, and the winding end portion is fixed to the adjacent first wall body, and each second wall is The body is predetermined around the center of the second scroll member. Together are arranged with a degree intervals, winding end portions, characterized in that it is fixed to the second wall of the next.

Each of the first wall bodies arranged at a predetermined angular interval around the center of the end plate of the first scroll member is engaged with the corresponding second wall body of the second scroll member. Thereby, the scroll compressor provided with a plurality of pairs each including one first wall body and one second wall body is configured. And it decided to fix the winding end part of each 1st wall body located in the outer periphery of a 1st scroll member to an adjacent 1st wall body. Thereby, the possibility that the winding end portion of each first wall body is deformed and inclined by centrifugal force can be avoided as much as possible, and the first wall body can be compressed without leakage. Similarly, the winding end part of each second wall located on the outer periphery of the second scroll member is fixed to the adjacent second wall. Thereby, the possibility that the winding end portion of each second wall body is deformed and inclined by the centrifugal force can be avoided as much as possible, and compression can be performed without leakage.
The “winding end portion” means a final end portion on the radially outer side when a spiral shape is formed from the center side toward the radially outer side.
The “center of the scroll member” means the center when the scroll member is viewed from the wall side, and preferably coincides with the center of gravity of the scroll member.
The “predetermined angle interval” is preferably a substantially equal angle interval in which the angle error with respect to the equal angle interval is ± 10 °, more preferably ± 1 °.
The first scroll member and the second scroll member may be double-rotating scrolls that rotate together, or one is a fixed scroll member (second scroll member) fixed at a fixed position and the other is fixed to the fixed scroll. A turning scroll member (first scroll member) that performs a revolving turning motion may be used.

  Furthermore, in the scroll compressor according to the present invention, the position at which the winding end portion of the first wall body is fixed to the adjacent first wall body is approximately 1 of the radius of the end plate of the first scroll member. It is characterized by being / 2.

  Since the end of winding of the wall body is fixed at a position approximately half the radius of the end plate, it can be fixed at a position where the centrifugal force is smaller than the outer peripheral side of the end plate, and the inclination of the wall body Can be suppressed as much as possible.

  Since the winding end portion of the spiral wall body is not deformed, it is possible to compress the fluid as much as possible. Thereby, the scroll compressor can be operated at a high speed.

It is the top view which showed the drive scroll member which concerns on 1st Embodiment of this invention. It is the top view which showed the driven scroll member which concerns on 1st Embodiment of this invention. FIG. 3 is a perspective view showing a state in which the driving scroll member of FIG. 1 and the driven scroll member of FIG. 2 are engaged with each other. FIG. 3 is a plan view showing a state in which the driving scroll member of FIG. 1 and the driven scroll member of FIG. 2 are engaged with each other. It is the top view which showed the state rotated 45 degrees from the state of FIG. It is the top view which showed the drive scroll member which concerns on 2nd Embodiment of this invention. It is the top view which showed the driven scroll member which concerns on 2nd Embodiment of this invention. It is the top view which showed the state which meshed | engaged the drive scroll member of FIG. 6, and the driven scroll member of FIG. It is the top view which showed the state rotated 45 degrees from the state of FIG.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
The first embodiment of the present invention will be described below.
The scroll compressor of the present embodiment compresses gas (fluid) and is not particularly limited. For example, the scroll compressor is used as a compressor of a vapor compression refrigerator and compresses refrigerant. is there. A drive source for driving the scroll compressor is not particularly limited, and examples thereof include an electric motor and rotational power extracted from a vehicle engine.

  The scroll compressor includes a drive scroll member and a driven scroll member that rotates in synchronization with the drive scroll member. The driving scroll member is connected to a driving shaft that is rotated by driving means (not shown). The driven scroll member is meshed with the drive shaft of the drive scroll by offsetting the driven shaft that supports the rotation of the driven scroll member by the turning radius. The driven scroll member and the drive scroll member are rotated in the same direction at the same angular velocity. As a result, the relative motion between the scroll members becomes a turning motion, and it is possible to perform the same compression as a scroll type compressor having a known fixed scroll and a turning scroll.

  FIG. 1 shows a driving scroll member (first scroll member) 1, and FIG. 2 shows a driven scroll member (second scroll member) 2. In the present embodiment, the wall portion of the driving scroll member 1 is hatched in order to facilitate the distinction between the driving scroll member 1 and the driven scroll member 2. Both scroll members 1 and 2 are made of an aluminum alloy or an iron-based metal. In the drawing, the outline of the end plate is not drawn, but it is a circle formed larger than the diameter surrounding the entire wall.

  As shown in FIG. 1, the driving scroll member 1 includes four spiral first walls 3 that are provided upright on one side surface of the end plate. The first wall bodies 3 are arranged around the center O1 of the drive scroll member 1 with an equiangular interval (90 ° interval in this embodiment). The center O <b> 1 of the driving scroll member 1 coincides with the center of gravity of the driving scroll member 1.

  Each first wall 3 has a spiral shape having a spiral start portion 3a on the center side and a winding end portion 3b on the outer peripheral side. The shape of the inner peripheral surface and the outer peripheral surface of the first wall 3 is formed by, for example, an involute curve. However, the portion of the winding start portion 3a of the first wall 3 is formed using various curves. A discharge port 5 for discharging the compressed gas to the outside is formed in the vicinity of the winding start portion 3 a of each first wall body 3.

  The winding end portion 3b of each first wall 3 is located on the outer peripheral side of the drive scroll member 1 and is fixed to a first ring portion 6 erected on one side of the end plate of the drive scroll member 1. Yes. In the present embodiment shown in FIG. 1, each winding end portion 3 b is integrally connected to the first ring portion 6. The first ring portion 6 is provided so as to surround all the first wall bodies 3 and has an endless annular shape having a constant thickness in the width direction.

  The winding start portion 3 a of each first wall 3 is formed so as to extend in the radial direction when viewed from the center O <b> 1 of the drive scroll member 1. Specifically, for example, the winding start portion 3a of the first wall portion 3 located in the first quadrant of FIG. 1 is formed to extend in the same direction as the arrow A1 extending outward from the radial direction. The same applies to the winding start portion 3a of the first wall body 3 located in the second quadrant to the fourth quadrant.

  As shown in FIG. 2, the driven scroll member 2 includes four spiral second walls 8 erected on one side surface of the end plate. Each of the second wall bodies 8 is arranged around the center O2 of the driven scroll member 2 with an equiangular interval (90 ° interval in this embodiment). That is, each 2nd wall body 8 is arrange | positioned in the position corresponding to each 1st wall body 3 meshed | engaged. The center O <b> 2 of the driven scroll member 2 coincides with the center of gravity of the driven scroll member 2.

  Each of the second wall bodies 8 has a single spiral shape having a spiral winding start portion 8a on the center side and a winding end portion 8b on the outer peripheral side. The shape of the inner peripheral surface and the outer peripheral surface of the second wall body 8 is formed by, for example, an involute curve. However, the part of the winding start part 8a of the second wall body 8 is formed using various curves.

The winding end portion 8b of each second wall body 8 is located on the inner peripheral side (center O2 side) of the driven scroll member 2.
The winding end portion 8 b of each second wall body 8 is fixed to a second ring portion 9 erected on one side of the end plate of the driven scroll member 2. In the present embodiment shown in FIG. 2, each winding end portion 8 b is integrally connected to the second ring portion 9. The second ring portion 9 is provided on the inner side of all the second wall bodies 8 and has an endless annular shape having a constant thickness in the width direction.

The driving scroll member 1 and the driven scroll member 2 described above are meshed as shown in a perspective view in FIG. Thus, four pairs of meshed scrolls are formed.
4 and 5 are plan views showing a state where the driving scroll member 1 and the driven scroll member 2 are engaged with each other.
The driving scroll member 1 and the driven scroll member 2 are engaged with each other while being shifted by the turning radius, and rotate around the centers O1 and O2 in the same rotational direction.
The state rotated 45 ° in the rotation direction from the state of FIG. 4 is the state of FIG. By rotating in this way, the first wall 3 and the second wall 8 relatively revolve and rotate, and the compression space formed between the walls 3 and 8 is gradually reduced, and the gas Compression is performed.

According to this embodiment, there exist the following effects.
The winding end portion 3 b of each first wall 3 located on the outer periphery of the drive scroll member 1 is fixed to the first ring portion 6. Since the first ring portion 6 has an endless annular shape, it has high rigidity against centrifugal force. Therefore, it is possible to avoid as much as possible the possibility that the winding end portion 3b of each first wall body 3 is deformed and inclined by centrifugal force, and can be compressed without leakage.

  By forming the winding start portion 3a of the first wall 3 so as to extend in the radial direction when viewed from the center O1 of the drive scroll member 1, the wall exists in the radial direction even when centrifugal force is applied, and the thickness is increased. Therefore, the strength against centrifugal force can be ensured. Thereby, the inclination by the deformation | transformation of the winding start part 3a is prevented as much as possible, and it can compress without leakage.

  By fixing the winding end portion 8b of the second wall body 8 of the driven scroll member 2 to the second ring portion 9 which is an endless annular wall body, the centrifugal force at the winding end portion 8b of the second wall body 8 is obtained. It was decided to suppress the inclination by. Since the winding end portion 8b of the second wall body 8 is located on the inner peripheral side of the driven scroll member 2, the centrifugal force is not relatively large. However, the second ring portion 9 reliably suppresses the inclination to prevent leakage. No compression can be achieved.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
This embodiment differs from the first embodiment in the fixing position of the winding end portion of each wall body, but the basic parts such as having four pairs of scrolls are common. Therefore, in the following description, the same code | symbol is used about a common structure, or "'" is attached | subjected to the same code | symbol, and the description is abbreviate | omitted.

FIG. 6 shows a driving scroll member 1 ′, and FIG. 7 shows a driven scroll member 2 ′.
As shown in FIG. 6, in this embodiment, the winding end portion 3 b ′ of the first wall 3 ′ of the drive scroll member 1 ′ is not located on the outer peripheral side, but is the radius of the end plate. It is located in the position of about 1/2. Specifically, although the outer shape of the end plate is not shown in FIG. 6, when the length of the arrow A2 is the radius R of the end plate, the position of the winding end portion 3b ′ from the center O1 is the arrow A3. The length is 1 / 2R.
The winding end portion 3b 'is adjacent to the first wall body 3' (for example, in FIG. 6, the winding end portion 3b 'of the first wall body 3' in the first quadrant is the first wall body 3 in the second quadrant adjacent to the left side. ') Is fixed. In the present embodiment shown in FIG. 6, each winding end portion 3 b ′ is integrally connected to the adjacent first wall body 3 ′.

  As shown in FIG. 7, the winding end portion 8 b ′ of the first wall body 8 ′ of the driven scroll member 2 ′ of the present embodiment is adjacent to the adjacent second wall body 8 ′ (for example, the first wall body 8 ′ in FIG. The winding end portion 8b ′ of the first wall body 8 ′ in the quadrant is fixed to the second wall body 8 ′) in the second quadrant on the left side. In the present embodiment shown in FIG. 7, each winding end portion 8 b ′ is integrally connected to the adjacent second wall body 8 ′. However, the connection position with respect to the second wall body 8 ′ adjacent to the winding end portion 8b ′ is slightly more outer than the position where the radius of the end plate is approximately ½ as in the driving scroll member 1 ′ shown in FIG. Located on the side. This is to prevent the wall bodies 3 ′ and 8 ′ from interfering with each other when the driving scroll member 1 ′ and the driven scroll member 2 ′ are engaged with each other. The position of the winding end portion 8b 'is preferably not located at the outermost peripheral position as viewed from the center O2, but is positioned closer to the central O2 side than the outermost peripheral position.

8 and 9 show a state in which the driving scroll member 1 ′ and the driven scroll member 2 ′ are engaged with each other.
The driving scroll member 1 ′ and the driven scroll member 2 ′ are engaged with each other while being shifted by the turning radius, and rotate around the respective centers O1 and O2 in the same rotational direction.
The state rotated 45 ° in the rotation direction from the state of FIG. 8 is the state of FIG. By rotating in this way, the first wall portion 3 ′ and the second wall portion 8 ′ relatively revolve and rotate, and the compression space formed between the wall portions 3 ′ and 8 ′ gradually decreases. The gas is compressed.

According to this embodiment, there exist the following effects.
The winding end portion 3b ′ of each first wall 3 ′ positioned on the outer periphery of the drive scroll member 1 ′ is fixed to the adjacent first wall 3 ′. Thereby, the possibility that the winding end portion 3b 'of each first wall 3' is deformed by the centrifugal force and tilted can be avoided as much as possible, and can be compressed without leakage.
Similarly, the winding end portion 8b ′ of each second wall body 8 ′ of the driven scroll member 2 ′ is fixed to the adjacent second wall body 8 ′. Thereby, the possibility that the winding end portion 8b 'of each second wall body 8' is deformed by the centrifugal force and tilted can be avoided as much as possible, and can be compressed without leakage.

Further, since the winding end portion 3b ′ of the first wall 3 ′ is fixed at a position that is approximately ½ of the radius of the end plate of the drive scroll member 1 ′, the centrifugal force is larger than that on the outer peripheral side of the end plate. Can be fixed at a small position, and the inclination of the wall can be suppressed as much as possible.
Similarly, the winding end portion 8b ′ of each second wall body 8 ′ of the driven scroll member 2 ′ is provided closer to the center O2 side than the outermost position when viewed from the center O2, and the adjacent second wall body 8 ′ Since it was fixed, the inclination of the wall body by centrifugal force can be suppressed as much as possible.

In addition, in each embodiment mentioned above, although the scroll type compressor by which the combination of the 1st wall body and the 2nd wall body was made into 4 pairs was demonstrated as an example, this invention is not limited to this, Three pairs or five or more pairs may be used.
Moreover, although the double-rotation type scroll compressor has been described as an example, the present invention can also be applied to a scroll compressor having a fixed scroll member and a turning scroll member. In this case, it is preferable to employ the configuration of the drive scroll members 1 and 1 ′ for the orbiting scroll member to which centrifugal force is applied.

1,1 'drive scroll member (first scroll member)
2,2 'driven scroll member (second scroll member)
3, 3 'first wall 3a, 3a' winding start part 3b, 3b 'winding end part 5 discharge port 6 first ring part 8 second wall body 8a, 8a' winding start part 8b, 8b 'winding end part 9 Second ring portion O1 Center of driven scroll member O2 Center of driven scroll member

Claims (5)

A first scroll member having a plurality of spiral first walls standing on one side of an end plate;
A plurality of spiral second wall bodies corresponding to the first wall bodies are provided on one side surface of the end plate, and each of the second wall bodies corresponds to the first scroll member corresponding to the first scroll member. A second scroll member meshed with the one wall body;
With
The first scroll member and the second scroll member compress the fluid taken into the compression space formed by the first wall body and the second wall body by relatively revolving orbiting,
Each of the first wall bodies is disposed with a predetermined angular interval around the center of the first scroll member, and the winding end portion is located on the outer peripheral side of the first scroll member,
Each of the second wall bodies is disposed with a predetermined angular interval around the center of the second scroll member,
A first ring portion that is erected on the one side surface of the end plate of the first scroll member and is an endless ring-shaped wall body to which the winding end portion of each first wall body is fixed; A scroll type compressor characterized by comprising.   2. The scroll compressor according to claim 1, wherein a winding start portion of each of the first wall bodies is formed to extend in a radial direction when viewed from the center of the first scroll member. Each of the second wall bodies has a winding end portion located on the inner peripheral side of the second scroll member,
A second ring portion that is erected on the one side surface of the end plate of the second scroll member and is an endless ring-shaped wall body to which the winding end portion of each second wall body is fixed. The scroll compressor according to claim 1, further comprising a scroll compressor. A first scroll member having a plurality of spiral first walls standing on one side of an end plate;
A plurality of spiral second wall bodies corresponding to the first wall bodies are provided on one side surface of the end plate, and each of the second wall bodies corresponds to the first scroll member corresponding to the first scroll member. A second scroll member meshed with the one wall body;
With
The first scroll member and the second scroll member compress the fluid taken into the compression space formed by the first wall body and the second wall body by relatively revolving orbiting,
Each of the first wall bodies is disposed with a predetermined angular interval around the center of the first scroll member, and the winding end portion is fixed to the adjacent first wall body,
Each of the second wall bodies is disposed at a predetermined angular interval around the center of the second scroll member, and a winding end portion is fixed to the adjacent second wall body. Machine.   The position at which the winding end portion of the first wall body is fixed to the adjacent first wall body is approximately ½ of the radius of the end plate of the first scroll member. The scroll compressor according to claim 4.

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