JP6382268B2 - Scroll fluid machinery - Google Patents

Description

  The present invention relates to a scroll fluid machine.

  In general, a scroll fluid machine is known in which a fixed scroll member provided with a spiral wall on an end plate and a orbiting scroll member are engaged with each other, and a revolving orbiting motion is performed to compress or expand a fluid.

  As such a scroll fluid machine, a so-called stepped scroll compressor as shown in Patent Document 1 is known. This stepped scroll compressor is provided with stepped portions at positions along the spiral direction of the tooth tip surface and the tooth bottom surface of the spiral wall body of the fixed scroll and the orbiting scroll, and the outer periphery of the wall body with each step portion as a boundary. The height on the side is higher than the height on the inner peripheral side. The stepped scroll compressor is compressed not only in the circumferential direction of the wall but also in the height direction (three-dimensional compression), so compared to a general scroll compressor (two-dimensional compression) that does not have a stepped portion. The displacement can be increased and the compressor capacity can be increased.

JP2015-55173A

  However, the stepped scroll compressor has a problem that fluid leakage at the stepped portion is large. In addition, there is a problem that the stress is concentrated due to the stress concentrated at the base of the stepped portion.

  On the other hand, the inventors are considering providing a continuous inclined part instead of the step part provided in the wall body and the end plate.

  A groove for accommodating the tip seal is formed along the spiral direction of the wall body at the tooth tip that is the tip of the wall body. The tip seal slides on the tooth bottom facing the tooth tip while the scroll compressor is in operation, thereby suppressing fluid leakage.

  When the wall and the end plate are provided with continuous inclined portions, the positions of the tooth tip and the tooth base are relatively shifted when both scroll members perform the revolving turning motion. The tip clearance changes with each turning angle. When the tip clearance changes for each turning angle in this way, the tip seal cannot follow and the sealing performance may be deteriorated.

  The present invention has been made in view of such circumstances, and even when the wall body and the end plate are provided with a continuous inclined portion, the function of the chip seal is effectively exhibited to achieve performance. It is an object of the present invention to provide a scroll fluid machine that can be improved.

  In order to solve the above problems, the scroll fluid machine of the present invention employs the following means.

The scroll fluid machine according to the present invention includes a first scroll member provided with a spiral first wall on a first end plate, and a spiral on a second end plate disposed so as to face the first end plate. Jo second wall is provided with, e Bei a second scroll member said second wall carries a relatively revolves meshes with said first wall, said a facing the first end plate a An inclined portion in which the distance between the opposing surfaces of the two end plates continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body is provided, At least one of the second wall body is provided with a wall body flat portion whose height does not change at the outermost periphery and the innermost periphery of at least one of the second wall, and at least one of the first end plate and the second end plate. On one side, an end plate flat part corresponding to the wall body flat part is provided, and the wall body flat part of the outermost peripheral part is provided. The wall inclined portion in which the height of the wall continuously decreases from the outer peripheral side toward the inner peripheral side so as to form the inclined portion between the wall inner flat portion and the innermost peripheral portion. And the bottom surface of the wall body inclined portion facing the tooth tip of the wall body inclined portion extends from the end plate flat portion of the outermost peripheral portion to the end plate flat portion of the innermost peripheral portion. An end plate inclined portion that is inclined in accordance with the inclination of the wall body, the length of the wall body inclined portion in the spiral direction is longer than the length of the wall body flat portion of the outermost peripheral portion in the spiral direction, and The length in the spiral direction of the wall body flat part at the innermost peripheral part is longer than the length in the spiral direction of the end plate flat part at the outermost peripheral part. The scroll fluid machine is longer than the length of the end plate flat portion of the innermost peripheral portion in the spiral direction. The the groove formed in the tooth tip of the corresponding inclined portion first wall and the second wall body, a tip seal for sealing the fluid in contact with the opposing tooth bottom is provided, said tip seal An urging member for urging the tip seal toward the tooth bottom side is provided between the groove portion and the groove bottom of the groove portion.

Since the inclined portion in which the distance between the opposing surfaces of the first end plate and the second end plate continuously decreases from the outer peripheral side to the inner peripheral side of the wall body is provided, the fluid sucked from the outer peripheral side is As it goes to the inner peripheral side, it is compressed not only by the reduction of the compression chamber according to the spiral shape of the wall body, but also by the reduction of the distance between the opposing surfaces between the end plates.
When both scroll members perform the revolving turning motion, the positions of the tooth tip and the tooth bottom are relatively shifted in the inclined portion, so that the tip clearance between the tooth tip and the tooth bottom changes for each turning angle. Therefore, by providing a biasing member that biases the tip seal toward the tooth bottom side between the tip seal and the groove bottom, the tip seal can be made to follow even when the tip clearance changes for each turning angle. Thereby, by reducing the fluid leakage, the function of the tip seal can be effectively exhibited and the performance of the scroll fluid machine can be improved.

Furthermore, in the scroll fluid machine according to the present invention, the biasing member has a deformation amount equal to or greater than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip. It is characterized by.
The scroll fluid machine according to the present invention includes a first scroll member provided with a spiral first wall on the first end plate, and a second end plate disposed so as to face the first end plate. A scroll fluid machine including a second scroll member provided with a second scroll member, and a second scroll member that engages with the first wall member and relatively revolves and swings. The distance between the opposing surfaces of the first end plate and the second end plate includes an inclined portion that continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body. The groove portions formed in the tooth tips of the first wall body and the second wall body corresponding to the inclined portion are provided with chip seals that contact the bottoms of the teeth and seal the fluid, and the chip seals. Between the groove bottom of the groove portion and the groove bottom, a biasing portion that biases the tip seal toward the tooth bottom The biasing member has a deformation amount equal to or greater than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip, and the tip seal Is always in contact with the opposing tooth bottom.

Since the urging member can be deformed more than the change amount of the tip clearance, the tip seal can always be pressed against the tooth bottom over all the turning angles.
The amount of change in the tip clearance is 2ρ × tanφ, where ρ is the turning radius and φ is the inclination of the inclined portion.

  Furthermore, in the scroll fluid machine according to the present invention, the biasing member has a deformation amount smaller than a depth of the groove portion.

  By making the deformation amount of the urging member smaller than the depth of the groove part, it is possible to prevent the chip seal from dropping from the groove part during assembly.

  Furthermore, in the scroll fluid machine of the present invention, the biasing member is a spring member disposed between the tip seal and the groove bottom.

  As an urging member, a spring member is disposed between the tip seal and the groove bottom. As the spring member, for example, a leaf spring is used.

  Furthermore, in the scroll fluid machine of the present invention, the urging member is a plurality of convex portions formed at the bottom of the tip seal.

  A plurality of convex portions formed at the bottom of the chip seal are used as the biasing member. Elastic deformation is performed by the expansion and contraction or bending of the convex portion. Moreover, by forming the convex portion together with the chip seal, the number of parts is reduced and the assembly is facilitated.

  Furthermore, in the scroll fluid machine according to the present invention, the biasing member has a deformation amount less than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip. And a plurality of protrusions formed at the bottom of the chip seal.

By making the amount of deformation of the biasing member less than the amount of change in the tip clearance, when the tip clearance exceeds a predetermined value, the tip seal is lifted from the groove bottom by the pressure of the fluid that has entered the bottom surface of the tip seal. At this time, since a plurality of convex portions are formed on the bottom portion of the chip seal, the flow of fluid is hindered by the labyrinth seal effect. Thereby, fluid leakage can be reduced.
Further, since the tip seal can be prevented from being excessively pressed against the tooth bottom, the reliability of the tip seal can be improved.
Each convex part is preferably provided so as to repeat in the spiral direction of the chip seal. Thereby, fluid leakage in the spiral direction can be suppressed.

  By providing a biasing member that biases the tip seal toward the tooth bottom side between the tip seal and the groove bottom, the tip seal can be made to follow even when the tip clearance changes for each turning angle. Thereby, by reducing the fluid leakage, the function of the tip seal can be effectively exhibited and the performance of the scroll fluid machine can be improved.

The fixed scroll and the turning scroll of the scroll compressor concerning 1st Embodiment of this invention are shown, (a) is a longitudinal cross-sectional view, (b) is the top view seen from the wall body side of the fixed scroll. It is the perspective view which showed the turning scroll of FIG. It is the top view which showed the end plate flat part provided in the fixed scroll. It is the top view which showed the wall body flat part provided in the fixed scroll. It is a schematic diagram which shows the wall body extended and displayed in the spiral direction. It is the elements on larger scale which expanded and showed the field of the code Z of Drawing 1 (b). 6 shows the tip clearance of the portion shown in FIG. 6, (a) is a side view showing a state where the tip clearance is relatively small, and (b) is a side view showing a state where the tip clearance is relatively large. is there. The leaf | plate spring provided in the bottom part of the tip seal | sticker is shown, (a) is the side view which showed the state with the smallest tip clearance, (b) is the side view which showed the state with the largest tip clearance. The leaf | plate spring provided in the bottom part of the chip | tip seal | sticker is shown, (a) is the cross-sectional view which showed the state with the smallest tip clearance, (b) is the cross-sectional view which showed the state with the largest tip clearance. The convex part provided in the bottom part of the chip seal which concerns on 2nd Embodiment of this invention is shown, (a) is the side view which showed the state with the smallest chip clearance, (b) is the state with the largest chip clearance. It is the side view shown. The convex part provided in the bottom part of the chip seal which concerns on 3rd Embodiment of this invention is shown, (a) is the side view which showed the state with the smallest chip clearance, (b) is the state with the largest chip clearance. It is the side view shown. A modification is shown, (a) is a longitudinal cross-sectional view which shows the combination with the scroll which does not have a step part, (b) is a longitudinal cross-sectional view which showed the combination with a stepped scroll.

[First Embodiment]
A first embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a fixed scroll (first scroll member) 3 and a turning scroll (second scroll member) 5 of a scroll compressor (scroll fluid machine) 1. The scroll compressor 1 is used as a compressor that compresses a gas refrigerant (fluid) that performs a refrigeration cycle such as an air conditioner.

  The fixed scroll 3 and the orbiting scroll 5 are made of a metal compression mechanism made of aluminum alloy or iron, and are housed in a housing (not shown). The fixed scroll 3 and the orbiting scroll 5 suck the fluid guided into the housing from the outer peripheral side, and discharge the compressed fluid from the central discharge port 3c of the fixed scroll 3 to the outside.

  The fixed scroll 3 is fixed to the housing and, as shown in FIG. 1A, stands on a substantially disc-shaped end plate (first end plate) 3a and one side surface of the end plate 3a. And a spiral wall body (first wall body) 3b. The orbiting scroll 5 includes a substantially disc-shaped end plate (second end plate) 5a and a spiral wall body (second wall body) 5b erected on one side surface of the end plate 5a. . The spiral shape of each wall 3b, 5b is defined using, for example, an involute curve or an Archimedean curve.

  The fixed scroll 3 and the orbiting scroll 5 are meshed with their centers separated by an orbiting radius ρ, with the phases of the wall bodies 3b and 5b shifted by 180 °, and between the tooth tips and the tooth bottoms of the wall bodies 3b and 5b of both scrolls. It is assembled so as to have a slight clearance in the height direction (chip clearance). Thus, a plurality of pairs of compression chambers formed between the scrolls 3 and 5 and surrounded by the end plates 3a and 5a and the walls 3b and 5b are formed symmetrically with respect to the scroll center. The orbiting scroll 5 revolves around the fixed scroll 3 by a rotation prevention mechanism such as an Oldham ring (not shown).

  As shown in FIG. 1 (a), the distance L between the facing surfaces 3a and 5a facing each other is continuously decreased from the outer peripheral side to the inner peripheral side of the spiral wall bodies 3b and 5b. Is provided.

  As shown in FIG. 2, the wall body 5b of the orbiting scroll 5 is provided with a wall body inclined portion 5b1 whose height continuously decreases from the outer peripheral side toward the inner peripheral side. An end plate inclined portion 3a1 (see FIG. 1 (a)) that is inclined according to the inclination of the wall body inclined portion 5b1 is provided on the tooth bottom surface of the fixed scroll 3 where the tooth tips of the wall body inclined portion 5b1 face each other. Yes. These wall body inclination part 5b1 and end plate inclination part 3a1 comprise the continuous inclination part. Similarly, the wall body 3b of the fixed scroll 3 is also provided with a wall body inclined portion 3b1 whose height is continuously inclined from the outer peripheral side toward the inner peripheral side, and faces the tooth tip of the wall body inclined portion 3b1. An end plate inclined portion 5 a 1 is provided on the end plate 5 a of the orbiting scroll 5.

  In addition, the meaning of continuous in the inclined portion in the present embodiment is not limited to the smoothly connected inclination, small steps that are inevitably generated during processing are connected in a staircase shape, If the inclined portion as a whole is included, the inclined portion may be continuously inclined. However, a large step portion such as a so-called step scroll is not included.

  The wall body inclined portions 3b1 and 5b1 and / or the end plate inclined portions 3a1 and 5a1 are coated. Examples of the coating include manganese phosphate treatment and nickel phosphorus plating.

As shown in FIG. 2, wall body flat portions 5b2 and 5b3 having a constant height are provided on the innermost circumferential side and the outermost circumferential side of the wall body 5b of the orbiting scroll 5, respectively. . These wall flat portions 5b2 and 5b3 are provided over a region of 180 ° around the center O2 (see FIG. 1A) of the orbiting scroll 5. Wall body inclined connection portions 5b4 and 5b5 serving as bent portions are respectively provided at positions where the wall body flat portions 5b2 and 5b3 and the wall body inclined portion 5b1 are connected.
Similarly, the bottom of the end plate 5a of the orbiting scroll 5 is provided with flat end plates 5a2 and 5a3 having a constant height. These end plate flat portions 5 a 2 and 5 a 3 are also provided over a 180 ° region around the center of the orbiting scroll 5. At the positions where the end plate flat portions 5a2 and 5a3 and the end plate inclined portion 5a1 are connected, end plate inclined connecting portions 5a4 and 5a5 serving as bent portions are provided, respectively.

  As shown by hatching in FIGS. 3 and 4, the fixed scroll 3 also has the end plate flat portions 3a2 and 3a3, the wall body flat portions 3b2 and 3b3, and the end plate inclined connection portions 3a4 and 3a5 in the same manner as the orbiting scroll 5. And wall body inclination connection part 3b4, 3b5 is provided.

FIG. 5 shows wall bodies 3b and 5b displayed in a spiral direction. As shown in the figure, the innermost wall flat portions 3b2 and 5b2 are provided over a distance D2, and the outermost wall flat portions 3b3 and 5b3 are provided over a distance D3. The distance D2 and the distance D3 are lengths corresponding to the regions 180 degrees around the centers O1 and O2 of the scrolls 3 and 5, respectively. Between the wall flats 3b3,5b3 of innermost wall flats 3b2,5b2 and the outermost side of the wall member inclined portion 3b1,5b1 are provided over a distance D 1. If the height difference between the innermost wall flat portions 3b2 and 5b2 and the outermost wall flat portions 3b3 and 5b3 is h, the inclination φ of the wall inclined portions 3b1 and 5b1 is given by the following equation.
φ = tan ^-1 (h / D1) (1)
Thus, the inclination φ in the inclined portion is constant with respect to the circumferential direction in which the spiral wall bodies 3b and 5b extend.

  FIG. 6 shows an enlarged view of the region indicated by the symbol Z in FIG. As shown in FIG. 6, a tip seal 7 is provided on the tooth tip of the wall 3 b of the fixed scroll 3. The tip seal 7 is made of resin and seals the fluid by contacting the tooth bottom of the end plate 5a of the orbiting scroll 5 facing the tip seal 7. The tip seal 7 is accommodated in a tip seal groove 3d formed in the tooth tip of the wall 3b over the circumferential direction. The compressed fluid enters the tip seal groove 3d, and the tip seal 7 is pressed from the back and pushed out toward the bottom of the tooth to be brought into contact with the opposing tooth bottom. A tip seal is similarly provided on the tooth tip of the wall 5b of the orbiting scroll 5.

As shown in FIG. 7, the height Hc of the tip seal 7 in the height direction of the wall 3b is constant in the circumferential direction.
When the scrolls 3 and 5 relatively revolve, the positions of the tooth tip and the tooth bottom are relatively shifted by the turning diameter (turning radius ρ × 2). Due to the positional deviation between the tooth tip and the tooth bottom, the tip clearance between the tooth tip and the tooth bottom changes in the inclined portion. For example, FIG. 7A shows that the tip clearance T is small, and FIG. 7B shows that the tip clearance T is large. Even if the tip clearance T changes due to the swiveling motion, the tip seal 7 is pressed against the tooth bottom side of the end plate 5a by the compressed fluid from the back surface, so that it can be followed and sealed.

In the present embodiment, the following configuration is adopted in order to cause the tip seal 7 to follow the tip clearance T that changes for each turning angle as shown in FIG.
As shown in FIG. 8, a leaf spring (spring member) 11 is disposed between the bottom 7a of the tip seal 7 and the groove bottom 3d1 of the tip seal groove 3d. The leaf spring 11 biases the tip seal 7 toward the opposite tooth bottom side (upper side in the figure).

The amount of elastic deformation of the leaf spring 11 is not less than the tip clearance change amount ΔT. The tip clearance change amount ΔT is an amount by which the tip clearance T changes within a 360 ° turning angle, and is expressed by the following equation using the turning radius ρ and the inclination φ of the wall inclined portions 3b1 and 5b1.
ΔT = 2ρ × tanφ (2)

  The amount of deformation of the leaf spring 11 is made smaller than the depth of the tip seal groove 3d. That is, when only the weight of the tip seal 7 is added to the leaf spring 11, the spring constant of the leaf spring 11 is such that the height of the leaf spring 11 (the vertical dimension in FIG. 8) is smaller than the tip seal groove 3d. Is set.

FIG. 8A shows a state in which the tip clearance T is the smallest among the rotation angles of 360 °, the leaf spring 11 is greatly contracted, and the tip seal 7 is pressed to the opposite tooth bottom side (see FIG. 8). 9 (a)).
FIG. 8B shows a state in which the tip clearance T is the largest among the turning angles of 360 ° (see FIG. 9B). Even in this state, the amount of elastic deformation of the leaf spring 11 is sufficiently secured, so that the tip seal 7 is pressed toward the opposing tooth bottom side.

The scroll compressor 1 described above operates as follows.
The orbiting scroll 5 performs a revolving orbiting motion around the fixed scroll 3 by a driving source such as an electric motor (not shown). Thereby, the fluid is sucked from the outer peripheral side of the scrolls 3 and 5, and the fluid is taken into the compression chambers surrounded by the walls 3b and 5b and the end plates 3a and 5a. The fluid in the compression chamber is sequentially compressed as it moves from the outer peripheral side to the inner peripheral side, and finally the compressed fluid is discharged from the discharge port 3 c formed in the fixed scroll 3. When the fluid is compressed, the inclined portions formed by the end plate inclined portions 3a1 and 5a1 and the wall body inclined portions 3b1 and 5b1 are also compressed in the height direction of the wall bodies 3b and 5b, and three-dimensional compression is performed. Is called.

According to this embodiment, there exist the following effects.
By providing a leaf spring 11 that urges the tip seal 7 toward the tooth bottom side between the tip seal 7 and the groove bottom 3d1, the tip seal 7 can be made to follow even when the tip clearance T changes for each turning angle. it can. Thereby, by reducing the fluid leakage, the function of the tip seal 7 can be effectively exhibited and the performance of the scroll compressor 1 can be improved.

  Since the deformation amount of the leaf spring 11 is set to the tip clearance change amount ΔT or more, the tip seal 7 can always be pressed against the tooth bottom over all the turning angles.

  Further, since the deformation amount of the leaf spring 11 is made smaller than the depth of the chip seal groove 3d, it is possible to prevent the chip seal 7 from dropping from the chip seal groove 3d during assembly.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The present embodiment is different in that a convex portion 7c is provided on the tip seal 7 instead of the leaf spring 11 of the first embodiment, and the others are the same. Therefore, only differences from the first embodiment will be described below.

  As shown in FIG. 10A, a plurality of convex portions (biasing members) 7 c are integrally formed on the bottom portion 7 a of the chip seal 7. Each protrusion 7c is formed so as to protrude downward from the bottom 7a, that is, toward the groove bottom 3d1. The convex portions 7 c are provided at predetermined intervals along the spiral direction (longitudinal direction) of the chip seal 7.

  As shown in FIG. 10B, the length of the projecting portion 7c in the extending direction (substantially in the vertical direction in the figure) is the largest even when the tip clearance T is 360 ° in the turning angle. The length of the protrusion 7c is in contact with the groove bottom 3d1 and is elastically deformable. Thereby, the elastic deformation amount of the convex part 7c is more than the tip clearance change amount ΔT.

Thus, in this embodiment, the urging | biasing force is given with respect to the chip | tip seal 7 when the some convex part 7c bends.
Instead of (or in addition to) bending the convex portion 7c, the convex portion may expand and contract in the extending direction. That is, the tip seal 7 may be urged by using an elastic force generated during expansion and contraction in the extending direction of the convex portion.

  As in this embodiment, by integrally forming the plurality of convex portions 7c on the bottom portion 7a of the chip seal 7, the biasing means can be applied to the chip seal as one member, and the number of parts is reduced. Assembling becomes easy.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. The present embodiment is different in that the deformation amount of the convex portion of the second embodiment is less than the tip clearance change amount ΔT, and the others are the same. Therefore, only differences from the second embodiment will be described below.

  As shown in FIG. 11, the convex portion 7d provided on the chip seal 7 of the present embodiment is shorter than the convex portion 7c of the second embodiment. The deformation amount of the convex portion 7d is less than the tip clearance change amount ΔT.

  Therefore, as shown in FIG. 11A, when the tip clearance T is the smallest of the 360 ° turning angles, the tip of the convex portion 7d comes into contact with the groove bottom 3d1, and the tip seal 7 can be urged. As shown in FIG. 11B, when the tip clearance T is the largest among the 360 ° turning angles, the tip of the convex portion 7d becomes the groove bottom due to the pressure of the fluid that has entered the bottom portion 7a side of the tip seal 7. Lift from 3d1.

  When the tip of the convex portion 7d of the chip seal 7 is lifted from the groove bottom 3d1 as shown in FIG. 11B, the plurality of convex portions 7d exhibit a labyrinth seal effect. That is, since a plurality of convex portions 7d are provided in the spiral direction of the tip seal 7, the flow of fluid flowing in the spiral direction can be reduced by the labyrinth seal effect. Thereby, the fluid leakage of a spiral direction can be suppressed and the performance of the scroll compressor 1 can be improved.

  Further, since the deformation amount of the convex portion 7d is less than the tip clearance change amount ΔT, the tip seal 7 can be prevented from being excessively pressed against the tooth bottom, and the reliability of the tip seal 7 can be improved.

In the above-described embodiments, the end plate inclined portions 3a1 and 5a1 and the wall body inclined portions 3b1 and 5b1 are provided on both the scrolls 3 and 5, but may be provided on either one.
Specifically, as shown in FIG. 12A, when one wall body (for example, the orbiting scroll 5) is provided with the wall body inclined portion 5b1, and the other end plate 3a is provided with the end plate inclined portion 3a1. The other wall body and the one end plate 5a may be flat.
Further, as shown in FIG. 12B, the shape combined with the conventional stepped shape, that is, the end plate 3a of the fixed scroll 3 is provided with the end plate inclined portion 3a1, while the end plate 5a of the orbiting scroll 5 is provided with the end plate 5a. You may combine with the shape in which the step part was provided.

  In each of the above-described embodiments, the wall flat portions 3b2, 3b3, 5b2, 5b3 and the end plate flat portions 3a2, 3a3, 5a2, 5a3 are provided. Then, the inclined portion may be provided so as to extend over the entire walls 3b and 5b.

  In the above-described embodiment, the scroll compressor has been described. However, the present invention can also be applied to a scroll expander used as an expander.

1 Scroll compressor (scroll fluid machine)
3 Fixed scroll (first scroll member)
3a End plate (first end plate)
3a1 End plate inclined part 3a2 End plate flat part (inner peripheral side)
3a3 Flat end plate (outside)
3a4 End plate inclined connection (inner circumference side)
3a5 End plate inclined connection (outer side)
3b Wall (first wall)
3b1 Wall body inclined part 3b2 Wall body flat part (inner circumference side)
3b3 Wall flat part (outside)
3b4 Wall inclined connection (inner circumference side)
3b5 Inclined wall connection (outside)
3c Discharge port 3d Tip seal groove 3d1 Groove bottom 5 Orbiting scroll (second scroll member)
5a End plate (second end plate)
5a1 End plate inclined part 5a2 End plate flat part (inner peripheral side)
5a3 Flat end plate (outside)
5a4 End plate inclined connection (inner circumference side)
5a5 Inclined end plate connection (outside)
5b Wall body (second wall body)
5b1 Wall body inclined part 5b2 Wall body flat part (inner circumference side)
5b3 Wall flat part (outside)
5b4 Wall body inclined connection (inner circumference side)
5b5 Wall body inclined connection (outside)
7 Chip seal 7a Bottom 7c Convex part (biasing member)
7d Convex part (biasing member)
11 Leaf spring (biasing member)
L Distance between opposing surfaces T Tip clearance φ Inclination

Claims (7)

A first scroll member provided with a spiral first wall on the first end plate;
A spiral second wall body is provided on a second end plate disposed so as to face the first end plate, and the second wall body meshes with the first wall body to relatively rotate and revolve. A second scroll member to perform;
Bei to give a,
There is an inclined portion in which the distance between the opposing surfaces of the first end plate and the second end plate facing each other continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body. Provided ,
The outermost peripheral part and the innermost peripheral part of at least one of the first wall body and the second wall body are provided with a wall body flat part whose height does not change,
At least one of the first end plate and the second end plate is provided with an end plate flat portion corresponding to the wall body flat portion,
The height of the wall body from the outer peripheral side toward the inner peripheral side so as to form the inclined portion between the wall body flat part of the outermost peripheral part and the wall flat part of the innermost peripheral part. Is provided with a wall slope portion that continuously decreases,
The tooth bottom surface that faces the tooth tip of the wall inclined portion extends from the end plate flat portion of the outermost peripheral portion to the end plate flat portion of the innermost peripheral portion according to the inclination of the wall inclined portion. End plate inclined part is provided,
The length of the wall body inclined portion in the spiral direction is longer than the length of the wall body flat portion in the outermost peripheral portion in the spiral direction, and the length in the spiral direction of the wall flat portion in the innermost peripheral portion. Longer than
The length of the end plate inclined portion in the spiral direction is longer than the length of the end plate flat portion of the outermost peripheral portion in the spiral direction, and the length of the end plate flat portion of the innermost peripheral portion in the spiral direction. A longer scroll fluid machine,
A tip seal that seals the fluid in contact with the opposing tooth bottom is provided in the groove portion formed in the tooth tip of the first wall body and the second wall body corresponding to the inclined portion,
A scroll fluid machine, wherein a biasing member that biases the tip seal toward the tooth bottom side is provided between the tip seal and the groove bottom of the groove portion.   2. The biasing member has a deformation amount equal to or greater than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip. A scroll fluid machine according to claim 1. A first scroll member provided with a spiral first wall on the first end plate;
A spiral second wall body is provided on a second end plate disposed so as to face the first end plate, and the second wall body meshes with the first wall body to relatively rotate and revolve. A second scroll member to perform;
A scroll fluid machine comprising:
An inclined portion in which the distance between the opposing surfaces of the first end plate and the second end plate facing each other continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body. Prepared,
A tip seal that seals the fluid in contact with the opposing tooth bottom is provided in the groove portion formed in the tooth tip of the first wall body and the second wall body corresponding to the inclined portion,
Between the tip seal and the groove bottom of the groove portion, a biasing member that biases the tip seal toward the tooth bottom side is provided ,
The biasing member has a deformation amount equal to or greater than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip.
The scroll fluid machine according to claim 1, wherein the tip seal is always in contact with the facing tooth bottom . It said biasing member is a scroll fluid machine according to any one of claims 1 to 3, characterized in that there is a small amount of deformation than the depth of the groove. The scroll fluid machine according to any one of claims 1 to 4 , wherein the biasing member is a spring member disposed between the tip seal and the groove bottom. The scroll fluid machine according to any one of claims 1 to 5 , wherein the urging member includes a plurality of convex portions formed at a bottom portion of the tip seal.   The biasing member has a deformation amount less than a change amount of a tip clearance between a tooth tip of the wall body and a tooth bottom of the end plate facing the tooth tip, and is formed at a bottom portion of the tip seal. The scroll fluid machine according to claim 1, wherein the plurality of convex portions are formed.

Images