A variable pitch scroll dynamic and static disk

Abstract

The present invention discloses a variable pitch scroll movable and stationary disk, comprising a stationary scroll, which is composed of a stationary scroll bottom and a stationary vortex sheet connected vertically to each other, and the stationary vortex sheet has a gradually narrowing thickness area in the rotation direction from the geometric center of the stationary scroll bottom to the surroundings; a moving scroll, which is composed of a moving scroll bottom and a moving vortex sheet connected vertically to each other; the stationary vortex sheet and the moving vortex sheet are engaged with each other, the stationary vortex sheet contacts the moving scroll bottom, and the moving vortex sheet contacts the stationary vortex bottom. The edge of the stationary scroll bottom of the stationary scroll is vertically connected to a barrel, and the extension direction of the barrel is in the same direction as the axial protrusion direction of the stationary vortex sheet. There is a connection between the stationary vortex sheet and the inner wall of the barrel, and the connection divides the stationary vortex sheet into an inner stationary vortex sheet and an outer stationary vortex sheet. This invention is used to target the pressures of different parts of the stationary vortex sheet under normal working conditions. The greater the pressure, the wider the thickness of the part, and vice versa, the narrower it is, thereby improving the operating stability and service life of the stationary vortex sheet and reducing the amount of materials used.

Description

Technical Field

[0001] The invention relates to the field of vehicle compressors, and in particular to a variable pitch scroll movable and stationary disk. Background Art

[0002] The scroll compressor is a compressor with a compressible volume, which is composed of a fixed involute scroll and an eccentrically rotating and translating involute scroll. The scroll compressor is composed of two moving and stationary scrolls of double function equation profiles that mesh with each other.

[0003] The scroll compressor is composed of two moving and stationary scrolls with double function equation profiles interlocking with each other. During the working process of suction, compression and exhaust, the stationary disk is fixed on the frame, and the moving disk is driven by the eccentric shaft and restrained by the anti-rotation mechanism, rotating in a plane with a very small radius around the center of the base circle of the stationary disk. The gas is sucked into the periphery of the stationary disk through the air filter element. As the eccentric shaft rotates, the gas is gradually compressed in several crescent-shaped compression chambers formed by the moving and stationary disks, and then discharged continuously from the axial hole of the central component of the stationary disk.

[0004] However, in actual application, the closer to the center of the scroll, the greater the pressure the scroll has to withstand, because it is in the second half of compression. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a variable pitch vortex movable and stationary disk. According to the pressure exerted on different parts of the stationary vortex blade under normal working conditions, the thickness of the part with greater pressure is wider, and vice versa, thereby improving the operating stability and service life of the stationary vortex blade and reducing material consumption.

[0006] In order to solve the above problems, the present invention provides a variable pitch scroll movable and stationary disk. In order to achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0007] A variable pitch scroll movable and stationary disk comprises: a stationary scroll, which is composed of a stationary scroll bottom and a stationary vortex sheet connected perpendicularly to each other, wherein the thickness of the stationary vortex sheet gradually narrows in a direction of rotation from the geometric center of the stationary vortex bottom to the surrounding areas; a movable scroll, which is composed of a movable scroll bottom and a movable vortex sheet connected perpendicularly to each other; the stationary vortex sheet and the movable vortex sheet are engaged with each other, the stationary vortex sheet contacts the movable scroll bottom, and the movable vortex sheet contacts the stationary vortex bottom.

[0008] The beneficial effect of adopting the above technical solution is that the thickness of the static vortex plate is closely related to the pressure it is subjected to. Under normal working conditions, the greater the pressure on the static vortex plate, the thicker its thickness is, that is, the same material has a greater structural strength and can withstand greater pressure. The static vortex plate uses less material to ensure that the static vortex plate has sufficient pressure, and the thickness of the static vortex plate is gradually changed as a whole, which ensures that the static vortex plate is smooth during the compression process and prevents the occurrence of stress concentration.

[0009] As a further improvement of the present invention, the edge of the bottom of the static vortex disk of the static vortex disk is vertically connected with a cylinder body, the extension direction of the cylinder body is the same as the axial protrusion direction of the static vortex plate, and there is a connecting portion between the static vortex plate and the inner wall of the cylinder body, and the connecting portion divides the static vortex plate into an inner static vortex plate and an outer static vortex plate. The inner static vortex plate is closer to the geometric center of the bottom of the static vortex disk than the outer static vortex plate.

[0010] The beneficial effect of adopting the above technical solution is that the cylinder body wraps the static vortex sheet and the dynamic vortex sheet to form a closed space, and the connecting part strengthens the middle section of the static vortex sheet, thereby improving the structural strength of the static vortex sheet.

[0011] As a further improvement of the present invention, the barrel is provided with a first air inlet, a second air inlet and a third air inlet, the axial directions of the first air inlet, the second air inlet and the third air inlet are parallel and parallel to the plane direction of the bottom of the static vortex disk, the first air inlet and the second air inlet are located on both sides of the connecting part, and the air inlet directions of the second air inlet and the third air inlet are facing each other.

[0012] The beneficial effect of adopting the above technical solution is that different air inlets can be switched to inject airflow from different positions and angles, making it convenient for the vortex moving and static disks to achieve different working conditions.

[0013] As a further improvement of the present invention, the aperture of the first air inlet is smaller than the aperture of the second air inlet, and the aperture of the second air inlet is equal to the aperture of the third air inlet.

[0014] The beneficial effect of adopting the above technical solution is that it is convenient to inject airflows with different flow rates under the same power.

[0015] As a further improvement of the present invention, when the connecting part connects the static vortex plate and the inner wall of the cylinder body, its two sides form a first arc surface and a second arc surface. The first arc surface and the second arc surface are concave surfaces and are tangent to the junction of the static vortex plate and the inner wall of the cylinder body.

[0016] The beneficial effect of adopting the above technical solution is: the width of the connection interface between the connecting part and the static vortex blade and the cylinder body is increased, the structural strength is improved, and at the same time the stress concentration point is eliminated, guiding the airflow to pass smoothly.

[0017] As a further improvement of the present invention, the thickness of the root of the outer stationary vortex sheet in contact with the connecting portion is greater than the thickness of the root of the inner stationary vortex sheet in contact with the connecting portion.

[0018] The beneficial effect of adopting the above technical solution is that the root of the outer static vortex sheet contacting the connecting part corresponds to the position of the first air inlet, and is impacted by the airflow from the air inlet, so the thickness here is relatively thick to withstand the impact.

[0019] As a further improvement of the present invention, the outer static vortex sheet has a beveled surface at the end away from the geometric center of the static vortex disk bottom, and the beveled surface is located on the side of the outer static vortex sheet facing the geometric center of the static vortex disk bottom.

[0020] The beneficial effect of adopting the above-mentioned technical scheme is that the beveled surface makes the thickness of the end of the outer static vortex blade sharply reduced, so that the end of the outer static vortex blade is quickly closed, which not only ensures the smooth flow of airflow, but also prevents the static vortex blade from having a narrow thickness and insufficient structural strength, thereby ensuring the overall structural strength of the static vortex blade.

[0021] As a further improvement of the present invention, the axial lengths of the barrel, the stationary vortex blades and the movable vortex blades are equal.

[0022] The beneficial effect of adopting the above technical solution is that when it is easy to bite, the cylinder body wraps and protects the movable scroll plate, and the ends of the fixed scroll plate and the movable scroll plate are in sealing contact with the bottom of the movable scroll plate and the bottom of the fixed scroll plate at the same time.

[0023] As a further improvement of the present invention, an exhaust hole is provided at the center of the bottom of the static vortex disk.

[0024] The beneficial effect of adopting the above technical solution is that the design position of the exhaust hole is closer to the discharge of the last compressed air.

[0025] As a further improvement of the present invention, the vortex profile equation of the static vortex sheet is:

[0026] X in =(2.7692+(-0.02)*u)*cos(u+π)+(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π-2*0.7583)*(π-2*0.7583)))*sin(u+π);

[0027] Y in =(2.7692+(-0.02)*u)*sin(u+π)-(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π-2*0.7583)*(π-2*0.7583)))*cos(u+π);

[0028] Where u represents the angle of extension (rad) and π is the circumference of a circle.

[0029] The beneficial effect of adopting the above technical solution is that a specific equation is provided to provide a basis for execution of ready-made processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a three-dimensional diagram of a stationary scroll according to an embodiment of the present invention;

[0032] Figure 2 is a top view of a stationary scroll according to an embodiment of the present invention;

[0033] Figure 3 is a top view of a stationary scroll according to an embodiment of the present invention;

[0034] Figure 4 is a three-dimensional diagram of a movable scroll according to an embodiment of the present invention;

[0035] Figure 5 is a top view of a movable scroll according to an embodiment of the present invention;

[0036] Figure 6 is a three-dimensional diagram of a movable scroll according to an embodiment of the present invention;

[0037] Figure 7 It is a schematic assembly diagram of an embodiment of the present invention;

[0038] Figure 8 is a side view of an embodiment of the present invention;

[0039] Fig. 9 It is an AA cross-sectional view of an embodiment of the present invention.

[0040] 1-static vortex blade; 1a-inner static vortex blade; 1b-outer static vortex blade; 2-static vortex disc bottom; 3-cylinder body; 4-connecting part; 5-first air inlet; 6-second air inlet; 7-third air inlet; 8-exhaust hole; 9-first arc surface; 10-second arc surface; 11-moving vortex disc bottom; 12-moving vortex blade; 13-arc cavity; 14-beveled surface; 15-spiral cavity. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with specific embodiments:

[0042] In order to achieve the purpose of the present invention, a variable pitch scroll movable and stationary disk comprises: a stationary scroll, which is composed of a stationary scroll bottom 2 and a stationary vortex sheet 1 which are vertically connected to each other, and the stationary vortex sheet 1 has a gradually narrowing area in the direction of rotation from the geometric center of the stationary scroll bottom 2 to the surrounding areas; a movable scroll, which is composed of a movable scroll bottom 11 and a movable vortex sheet 12 which are vertically connected to each other; the stationary vortex sheet 1 and the movable vortex sheet 12 are interlocked with each other, the stationary vortex sheet 1 is in contact with the movable scroll bottom 11, and the movable vortex sheet 12 is in contact with the stationary scroll bottom 2.

[0043] The beneficial effect of adopting the above technical solution is that the thickness of the static vortex plate is closely related to the pressure it is subjected to. Under normal working conditions, the greater the pressure on the static vortex plate, the thicker its thickness is, that is, the same material has a greater structural strength and can withstand greater pressure. The static vortex plate uses less material to ensure that the static vortex plate has sufficient pressure, and the thickness of the static vortex plate is gradually changed as a whole, which ensures that the static vortex plate is smooth during the compression process and prevents the occurrence of stress concentration.

[0044] In other embodiments of the present invention, the edge of the static vortex disc bottom 2 of the static vortex disc is vertically connected to the barrel 3, the extension direction of the barrel 3 is the same as the axial protrusion direction of the static vortex plate 1, and there is a connecting portion 4 between the static vortex plate 1 and the inner wall of the barrel 3. The connecting portion 4 divides the static vortex plate 1 into an inner static vortex plate 1a and an outer static vortex plate 1b. The inner static vortex plate 1a is closer to the geometric center of the static vortex disc bottom 2 than the outer static vortex plate 1b.

[0045] like Figure 3 As shown in FIG. 1 , six rays are emitted from the exhaust hole 8 as the center, and the angle between adjacent rays is 60°. The width of each point of the static vortex sheet on the ray is Figure 3 Also indicated in. From the static vortex sheet 1 at the center to the surroundings, the width dimension of the static vortex sheet 1 is gradually reduced, and the width dimension of the static vortex sheet 1 from the connecting portion 4 to the surroundings is also gradually reduced.

[0046] The inner stationary vortex sheet 1a forms a spiral cavity 15 , and the outer stationary vortex sheet 1b and the inner wall of the barrel 3 form an arc cavity 13 .

[0047] The beneficial effect of adopting the above technical solution is that the cylinder body wraps the static vortex sheet and the dynamic vortex sheet to form a closed space, and the connecting part strengthens the middle section of the static vortex sheet, thereby improving the structural strength of the static vortex sheet.

[0048] In some other embodiments of the present invention, the barrel body 3 is provided with a first air inlet 5, a second air inlet 6, and a third air inlet 7. The axial directions of the first air inlet 5, the second air inlet 6, and the third air inlet 7 are parallel and parallel to the plane direction of the static vortex disc bottom 2. The first air inlet 5 and the second air inlet 6 are located on both sides of the connecting portion 4, and the air inlet directions of the second air inlet 6 and the third air inlet 7 are facing each other.

[0049] The beneficial effect of adopting the above technical solution is that different air inlets can be switched to inject airflow from different positions and angles, making it convenient for the vortex moving and static disks to achieve different working conditions.

[0050] In some other embodiments of the present invention, the aperture of the first air inlet 5 is smaller than the aperture of the second air inlet 6 , and the aperture of the second air inlet 6 is equal to the aperture of the third air inlet 7 .

[0051] The beneficial effect of adopting the above technical solution is that it is convenient to inject airflows with different flow rates under the same power.

[0052] In other embodiments of the present invention, when the connecting portion 4 is connected to the static vortex blade 1 and the inner wall of the cylinder body 3, its two sides form a first arc surface 9 and a second arc surface 10. The first arc surface 9 and the second arc surface 10 are concave surfaces and are tangent to the junction of the static vortex blade 1 and the inner wall of the cylinder body 3.

[0053] The beneficial effect of adopting the above technical solution is: the width of the connection interface between the connecting part and the static vortex blade and the cylinder body is increased, the structural strength is improved, and at the same time the stress concentration point is eliminated, guiding the airflow to pass smoothly.

[0054] In some other embodiments of the present invention, the root thickness of the outer static vortex blade 1 b in contact with the connecting portion 4 is greater than the root thickness of the inner static vortex blade 1 a in contact with the connecting portion 4 .

[0055] The beneficial effect of adopting the above technical solution is that the root of the outer static vortex sheet contacting the connecting part corresponds to the position of the first air inlet, and is impacted by the airflow from the air inlet, so the thickness here is relatively thick to withstand the impact.

[0056] In other embodiments of the present invention, the outer static vortex blade 1b has a beveled surface 14 at the end away from the geometric center of the static vortex disk bottom 2. The beveled surface 14 is located on the side of the outer static vortex blade 1b facing the geometric center of the static vortex disk bottom 2.

[0057] The beneficial effect of adopting the above-mentioned technical scheme is that the beveled surface makes the thickness of the end of the outer static vortex blade sharply reduced, so that the end of the outer static vortex blade is quickly closed, which not only ensures the smooth flow of airflow, but also prevents the static vortex blade from having a narrow thickness and insufficient structural strength, thereby ensuring the overall structural strength of the static vortex blade.

[0058] In some other embodiments of the present invention, the axial lengths of the barrel 3, the stationary vortex blade 1, and the movable vortex blade 12 are equal.

[0059] The beneficial effect of adopting the above technical solution is that when it is easy to bite, the cylinder body wraps and protects the movable scroll plate, and the ends of the fixed scroll plate and the movable scroll plate are in sealing contact with the bottom of the movable scroll plate and the bottom of the fixed scroll plate at the same time.

[0060] As a further improvement of the present invention, an exhaust hole is provided at the center of the bottom of the static vortex disk.

[0061] The beneficial effect of adopting the above technical solution is that the design position of the exhaust hole is closer to the discharge of the last compressed air.

[0062] In some other embodiments of the present invention, the vortex profile equation of the inner circle of the static vortex blade 1 is:

[0063] X in =(2.7692+(-0.02)*u)*cos(u+π)+(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π-2*0.7583)*(π-2*0.7583)))*sin(u+π);

[0064] Y in =(2.7692+(-0.02)*u)*sin(u+π)-(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π-2*0.7583)*(π-2*0.7583)))*cos(u+π);

[0065] Where X in , Y in That is, the plane xy coordinate system represents the trajectory of the inner circle of the static vortex sheet 1. Among them, u represents the expansion angle (rad), and π is the circumference.

[0066] The beneficial effect of adopting the above technical solution is that a specific equation is provided to provide a basis for execution of ready-made processing.

[0067] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable pitch scroll moving and stationary disc, characterized in that: include: The static vortex disk is composed of a static vortex disk bottom and a static vortex sheet connected vertically to each other, and the static vortex sheet has a gradually narrowing thickness area in the rotation direction from the geometric center of the static vortex disk bottom to the surroundings; The movable scroll is composed of a movable scroll base and a movable scroll sheet which are vertically connected to each other; The static vortex sheet and the movable vortex sheet are engaged with each other, the static vortex sheet is in contact with the bottom of the movable vortex plate, and the movable vortex sheet is in contact with the bottom of the static vortex plate; The edge of the static vortex bottom of the static vortex disk is vertically connected with a cylinder body, the extension direction of the cylinder body is in the same direction as the axial protrusion direction of the static vortex sheet, the static vortex sheet and the inner wall of the cylinder body have a connecting portion, the connecting portion divides the static vortex sheet into an inner static vortex sheet and an outer static vortex sheet, and the inner static vortex sheet is closer to the geometric center of the static vortex bottom than the outer static vortex sheet; The cylinder body is provided with a first air inlet, a second air inlet and a third air inlet, the axial directions of the first air inlet, the second air inlet and the third air inlet are parallel and parallel to the plane direction of the bottom of the static vortex disk, the first air inlet and the second air inlet are located on both sides of the connecting part, and the air inlet directions of the second air inlet and the third air inlet are opposite to each other.

2. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: The aperture of the first air inlet is smaller than that of the second air inlet, and the aperture of the second air inlet is equal to that of the third air inlet.

3. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: When the connecting portion is connected to the stationary vortex plate and the inner wall of the cylinder body, the two sides thereof form a first arc surface and a second arc surface. The first arc surface and the second arc surface are concave surfaces and are tangent to the junction of the stationary vortex plate and the inner wall of the cylinder body.

4. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: The thickness of the root of the outer stationary vortex sheet in contact with the connecting portion is greater than the thickness of the root of the inner stationary vortex sheet in contact with the connecting portion.

5. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: The outer static vortex sheet has an oblique cut surface at the end away from the geometric center of the static vortex disc bottom, and the oblique cut surface is located on the side of the outer static vortex sheet facing the geometric center of the static vortex disc bottom.

6. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: The axial lengths of the cylinder body, the stationary vortex sheet and the movable vortex sheet are equal.

7. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: An exhaust hole is provided at the center of the bottom of the static vortex disk.

8. The variable pitch scroll movable and stationary disk according to claim 1, characterized in that: The vortex profile equation of the static vortex sheet is: X in =(2.7692+(-0.02)*u)*cos(u+π)+(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π -2*0.7583)*(π-2*0.7583)))*sin(u+π); Y in =(2.7692+(-0.02)*u)*sin(u+π)-(2.7692*(u+π-2*0.7583)+(-0.01)*(u*u-(π -2*0.7583)*(π-2*0.7583)))*cos(u+π); Among them, u represents the expansion angle and π is pi.

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