Combined arc asymmetric variable wall thickness scroll plate and molded line design method thereof

Abstract

The invention discloses a combined arc asymmetric variable wall thickness scroll plate and a molded line design method thereof, a generation base line of a molded line of a movable scroll plate and a movable scroll plate is composed of a plurality of arc sections, the combined arc sections comprise a left side combined arc section and a right side combined arc section, and the left side combined arc section and the right side combined arc section are respectively composed of a plurality of arc sections. The plurality of circular arc sections are set to be 1-N circular arc sections with different radiuses, and the circular arc sections are connected in sequence and meet a first-order continuous condition; according to a set turning radius, structural parameters are completely defined by defining a point set (theta i, Ri), a molded line structure of the dynamic and static scroll plates capable of being correctly meshed is generated by generating a base line, and the dynamic and static scroll plates with differences are generated according to the molded line structure of the dynamic and static scroll plates. Differentiation of molded lines of the dynamic and static scroll plates and flexible adjustment of the wall thickness of the scroll plates at different positions can be achieved, then the dynamic and static plate structures of the scroll machine are fully optimized and adjusted, and the thermodynamic performance of the scroll machine is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of scroll machine design, and particularly relates to a combined arc asymmetric variable wall thickness scroll disk and a profile design method thereof. Background Art

[0002] Scroll machines are positive displacement rotary machines with forced suction and exhaust functions, and are widely used in modern industry as gas compressors or expanders. Compared with dynamic compression and expansion machines, it has many advantages such as reliable operation, strong working condition adaptability, and low cost. Compared with other positive displacement machines, it has the characteristics of no vulnerable parts such as air valves, compatibility with liquids, and high operating efficiency, and is the core component in systems such as medium and low pressure air supply, steam cycle refrigeration, and organic Rankine cycle waste heat recovery.

[0003] The core design element of a scroll machine is the scroll disk profile, and the design of the scroll disk profile will directly determine the thermo-dynamic performance of the whole machine. Advanced scroll profile design methods need to comprehensively consider the variation law of its volumetric working chamber, the variation law of the leakage line length, and the variation law of the connection area with the suction and exhaust orifices, so as to regulate the internal compression, leakage, and suction and exhaust processes.

[0004] Traditional fixed and moving scroll disk profiles adopt the same profile structure, which limits the further improvement of the performance of scroll machines. Since the structure of the moving scroll disk not only determines the thermo-physical process of its gas transportation, but also determines the dynamic balance during the operation of the moving scroll disk, thus affecting its vibration and noise. At the same time, due to the further improvement of the integration requirements for scroll machines, the air inlet is often arranged asymmetrically, which further puts forward different design requirements for the structures of the fixed and moving scroll disks. In addition, due to the difference in the internal pressure distribution of the fixed and moving scroll disks, the wall thickness requirements for the scroll disks at different positions are also different. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems in the prior art, and provide a combined arc asymmetric variable wall thickness scroll disk and a profile design method thereof, so as to realize the differentiation of the profiles of the fixed and moving scroll disks, and the flexible adjustment of the wall thickness of the scroll disk at different positions, and further fully optimize and adjust the structures of the fixed and moving disks of the scroll machine, and achieve the improvement of the thermo-dynamic performance of the scroll machine.

[0006] In order to achieve the above purpose, the present invention has the following technical solutions:

[0007] In the first aspect, a combined arc non-symmetric variable-wall-thickness scroll disk is provided. The generating baseline of the profiles of the fixed and moving scroll disks consists of multiple arc segments. The combined arc segments include a left combined arc segment and a right combined arc segment. The left combined arc segment and the right combined arc segment are each composed of several arc segments. The several arc segments are set as 1 to N arc segments with different radii. The arc segments are connected in sequence and satisfy the first-order continuity condition. According to the set rotation radius, the profiles of the fixed and moving scroll disks that can be correctly meshed are generated through the generating baseline, and the fixed and moving scroll disks with differences are generated according to the profiles of the fixed and moving scroll disks.

[0008] As a preferred solution, the left combined arc segment includes arc segment I connected in sequence L , arc segment II L , arc segment III L and arc segment IV L . The right combined arc segment includes arc segment I connected in sequence R , arc segment II R , arc segment III R and arc segment IV R . The left combined arc segment and the right combined arc segment completely define the structural parameters by defining the point set (θ i , R i ), and then generate the profiles of the fixed and moving scroll disks with differences. In the formula, θ i represents the angular parameter of the i-th arc segment, and R i represents the radius of the i-th arc segment.

[0009] As a preferred solution, the several arc segments of the left combined arc segment and the right combined arc segment are solved through the following expressions:

[0010]

[0011] In the formula, x i represents the abscissa of the i-th arc segment, y i represents the ordinate of the i-th arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th arc segment, R i represents the radius of the i-th arc segment, θ represents the angular parameter of the corresponding arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

[0012] As a preferred solution, the profile of the fixed and moving scroll disks is solved by equidistantly fixing a distance in the normal direction according to the coordinates of the generating baseline;

[0013] The abscissa and ordinate of the profile of the fixed and moving scroll disks in the rectangular coordinate system Oxy are solved according to the following formula:

[0014]

[0015] Wherein, D r is the rotational diameter of the moving scroll disk;

[0016] n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the point on the generating baseline, and are solved through the following expressions:

[0017]

[0018] Second, a profile design method for a combined arc asymmetric variable wall thickness scroll disk is provided, including the following steps:

[0019] According to the requirements of displacement volume, sealing performance, and thermodynamic characteristics, select the rotational radius and point set (θ i , R i ), where θ i represents the angular parameter of the i-th arc segment, and R i represents the radius of the i-th arc segment, forming a parameter set;

[0020] Solve several arc segments of the left combined arc segment and the right combined arc segment through the parameter set;

[0021] Solve the abscissa and ordinate of the unit vector of the normal vector of the point on the generating baseline of the profiles of the fixed and moving scroll disks;

[0022] According to the meshing relationship, solve the profile structure of the fixed scroll disk by equidistantly fixing the distance in the normal direction according to the coordinates of the generating baseline;

[0023] Obtain different profile structures of the fixed and moving scroll disks by defining different point sets and generate the fixed and moving scroll disks.

[0024] As a preferred solution, the steps of solving several arc segments of the left combined arc segment and the right combined arc segment through the parameter set are calculated as follows:

[0025]

[0026] Wherein, x i represents the abscissa of the i-th arc segment, y i represents the ordinate of the i-th arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th arc segment, R i represents the radius of the i-th arc segment, θ represents the angular parameter of the corresponding arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

[0027] As a preferred solution, the steps of calculating the abscissa and ordinate of the unit vector of the normal vector of the point on the generation baseline of the static and dynamic scroll profiles are as follows:

[0028]

[0029] In the formula, n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the point on the generation baseline.

[0030] As a preferred solution, the steps of solving the static scroll profile structure by equidistantly fixing a distance in the normal direction according to the meshing relationship based on the coordinates of the generation baseline are as follows:

[0031]

[0032] In the formula, D r is the rotational diameter of the moving scroll.

[0033] As a preferred solution, the steps of obtaining different static and dynamic scroll profile structures by defining different point sets and generating the static and dynamic scrolls can realize the differentiation of the static and dynamic scroll profile structures and the adjustment of the wall thickness of the static and dynamic scrolls at different positions, thereby improving the thermo-dynamic performance of the scroll machine.

[0034] In a third aspect, a computer-readable storage medium is provided, in which at least one instruction is stored, and the at least one instruction is executed by a processor in an electronic device to implement the profile design method described above.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] By using a generation baseline composed of multiple arc segments to generate a static and dynamic scroll profile structure that can be correctly meshed, the combined arc segments include a left combined arc segment and a right combined arc segment. The left combined arc segment and the right combined arc segment are respectively composed of several arc segments. The several arc segments are set as 1 to N arc segments with different radii. Each arc segment is connected in sequence and satisfies the first-order continuity condition. By setting a reasonable rotational radius, the method of generating a baseline for an equidistant profile can be used to generate a static and dynamic scroll profile structure that can be correctly meshed. The static and dynamic scroll profile structure generated by the present invention can completely define the structural parameters by reasonably setting the arc segment parameters, and then generate different static and dynamic scroll structures. Through the static and dynamic scroll profile structure generated by the present invention, the differentiation of the static and dynamic scroll profiles and the flexible adjustment of the wall thickness of the scrolls at different positions can be realized, thereby fully optimizing and adjusting the static and dynamic disk structures of the scroll machine and improving the thermo-dynamic performance of the scroll machine. Description of the Drawings

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0038] Figure 1 Schematic diagram of the generation baseline structure of the combined circular arc and asymmetric variable wall thickness scroll disk in the embodiment of the present invention;

[0039] Figure 2 Schematic diagram of the process of generating the profiles of the moving and stationary scroll disks through the generation baseline in the embodiment of the present invention;

[0040] Figure 3(a) Schematic diagram of the point set (θ i , R i ) defining the combined circular arc segments on the left and right sides of the generation baseline in the first embodiment of the present invention;

[0041] Figure 3(b) Schematic diagram of the profiles of the moving and stationary scroll disks generated through the generation baseline in the first embodiment of the present invention;

[0042] Figure 4(a) Schematic diagram of the point set (θ i , R i ) defining the combined circular arc segments on the left and right sides of the generation baseline in the second embodiment of the present invention;

[0043] Figure 4(b) Schematic diagram of the profiles of the moving and stationary scroll disks generated through the generation baseline in the second embodiment of the present invention. Detailed implementation manners

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art can also obtain other embodiments without creative efforts.

[0045] It should be noted that in the description of the embodiments of the present invention, the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0046] Please refer to Figure 1, an embodiment of the present invention proposes a combined arc asymmetric variable wall thickness scroll disk. The generation baseline of the profiles of the fixed and moving scroll disks consists of multiple arc segments. The combined arc segments include a left combined arc segment and a right combined arc segment. The left combined arc segment and the right combined arc segment are respectively composed of several arc segments. The several arc segments are set as 1 to N arc segments with different radii. Each arc segment is connected in sequence and satisfies the first-order continuity condition; according to the set rotation radius, the profiles of the fixed and moving scroll disks that can be correctly meshed are generated through the generation baseline, and the fixed and moving scroll disks with differences are generated according to the profiles of the fixed and moving scroll disks. The left combined arc segment of the embodiment of the present invention includes arc segment I connected in sequence L , arc segment II L , arc segment III L and arc segment IV L . The right combined arc segment includes arc segment I connected in sequence R , arc segment II R , arc segment III R and arc segment IV R . The left combined arc segment and the right combined arc segment completely define the structural parameters by defining the point set (θ i , R i ), and then generate the profiles of the fixed and moving scroll disks with differences. In the formula, θ i represents the angular parameter of the i-th arc segment, and R i represents the radius of the i-th arc segment.

[0047] In a possible implementation manner, in the coordinate system Oxy, the several arc segments of the left combined arc segment and the right combined arc segment are solved through the following expressions:

[0048]

[0049] In the formula, x i represents the abscissa of the i-th arc segment, y i represents the ordinate of the i-th arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th arc segment, R i represents the radius of the i-th arc segment, θ represents the angular parameter of the corresponding arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

[0050] Further, the profile of the fixed and moving scroll disks is solved by equidistantly offsetting a fixed distance in the normal direction according to the coordinates of the generation baseline;

[0051] The abscissa and ordinate of the profile of the fixed and moving scroll disks in the rectangular coordinate system Oxy are solved according to the following formula:

[0052]

[0053] In the formula, D r is the rotational diameter of the moving scroll plate;

[0054] n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the point on the generating baseline, and are solved through the following expressions:

[0055]

[0056] The complete generation process of the profiles of the fixed and moving scroll plates is as Figure 2 shown. The generated profiles can generate a set of fixed and moving scroll plates, and further realize the correct meshing movement of the fixed and moving scroll plates when the moving scroll plate performs a translational movement with a rotational radius of D r / 2.

[0057] Please refer to Fig. 3(a) and Fig. 3(b) as well as Fig. 4(a) and Fig. 4(b). By defining the set of generation parameters (θ i , R i ) of the generating baseline, profiles of fixed and moving scroll plates with different structures can be generated, and thus the scroll plate structure of the scroll machine can be flexibly designed.

[0058] Another embodiment of the present invention proposes a profile design method for the combined arc asymmetric variable wall thickness scroll plate described above. The profile structures of the fixed and moving scroll plates are different, and the wall thickness of the scroll plate can be flexibly designed, and the correct meshing relationship can also be achieved. The generating baseline of the profiles of the fixed and moving scroll plates consists of multiple arc segments, and the arc segments can be set to 1 to N arc segments with different radii. The arc segments are connected end to end and meet the first-order continuity condition. By setting a reasonable rotational radius and adopting the method of generating the baseline with an equidistant profile, a profile structure of the fixed and moving scroll plates that can complete correct meshing can be generated. The profile design method includes the following steps:

[0059] S1. According to the requirements of exhaust volume, sealing performance, and thermodynamic characteristics, select the rotational radius and the point set (θ i , R i ), where θ i represents the angular parameter of the i-th arc segment, and R i represents the radius of the i-th arc segment, to form a parameter set;

[0060] S2. Solve several arc segments of the left combined arc segment and the right combined arc segment through the parameter set;

[0061] S3. Solve the abscissa and ordinate of the unit vector of the normal vector of the point on the generating baseline of the profiles of the fixed and moving scroll plates;

[0062] S4. According to the meshing relationship, solve the profile structure of the stationary scroll disk by equidistantly offsetting a fixed distance in the normal direction based on the coordinates of the generation baseline;

[0063] S5. Obtain different profile structures of the stationary and moving scroll disks by defining different point sets and generate the stationary and moving scroll disks.

[0064] In a possible implementation manner, for the step of solving several circular arc segments of the left combined circular arc segment and the right combined circular arc segment through the parameter set in step S2, the calculation expression is as follows:

[0065]

[0066] In the formula, x i represents the abscissa of the i-th circular arc segment, y i represents the ordinate of the i-th circular arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th circular arc segment, R i represents the radius of the i-th circular arc segment, θ represents the angular parameter of the corresponding circular arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

[0067] In a possible implementation manner, for the step of solving the abscissa and ordinate of the unit vector of the normal vector of the points on the generation baseline of the profile of the stationary and moving scroll disks in step S3, the calculation expression is as follows:

[0068]

[0069] In the formula, n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the points on the generation baseline.

[0070] In a possible implementation manner, for the step of solving the profile structure of the stationary scroll disk by equidistantly offsetting a fixed distance in the normal direction based on the coordinates of the generation baseline according to the meshing relationship in step S4, the calculation expression is as follows:

[0071]

[0072] In the formula, D r is the rotational diameter of the moving scroll disk.

[0073] In a possible implementation manner, for the step of obtaining different profile structures of the stationary and moving scroll disks by defining different point sets and generating the stationary and moving scroll disks in step S5, the differentiation of the profile structures of the stationary and moving scroll disks and the adjustment of the wall thickness of the stationary and moving scroll disks at different positions are realized by defining different point sets, so as to improve the thermo-dynamic performance of the scroll machinery.

[0074] Another embodiment of the present invention provides an electronic device, including: a memory storing at least one instruction; and a processor executing the instruction stored in the memory to implement the involute profile design method.

[0075] Another embodiment of the present invention provides a computer-readable storage medium storing at least one instruction, and the at least one instruction is executed by a processor in an electronic device to implement the involute profile design method.

[0076] Exemplarily, the instruction stored in the memory can be divided into one or more modules / units, and the one or more modules / units are stored in the computer-readable storage medium and executed by the processor to complete the involute profile design method of the combined arc asymmetric variable-wall-thickness scroll disk of the present invention. The one or more modules / units can be a series of computer-readable instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the server.

[0077] The electronic device can be a computing device such as a smart phone, a notebook, a palm computer, and a cloud server. The electronic device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the electronic device may further include more or fewer components, or combine certain components, or different components. For example, the electronic device may further include input / output devices, network access devices, a bus, etc.

[0078] The processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0079] The memory may be an internal storage unit of the server, such as the hard disk or memory of the server. The memory may also be an external storage device of the server, such as a plug-in hard disk equipped on the server, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory may also include both the internal storage unit of the server and external storage devices. The memory is used to store the computer-readable instructions and other programs and data required by the server. The memory may also be used to temporarily store data that has been output or is to be output.

[0080] It should be noted that, for the information interaction, execution process, etc. between the above module units, since they are based on the same concept as the method embodiment, for their specific functions and the technical effects brought, reference may be specifically made to the method embodiment part, and details will not be elaborated here.

[0081] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In practical applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment, and details will not be elaborated here.

[0082] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of this application, a computer program can be used to instruct relevant hardware to complete. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can at least include: any entity or device capable of carrying the computer program code to the photographing device / terminal device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk, or an optical disc, etc.

[0083] In the above embodiments, the descriptions of the various embodiments each have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing various embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A combined arc asymmetric variable wall thickness scroll disk, characterized in that: The generation baseline of the moving and static scroll profiles consists of multiple circular arc segments. The combined circular arc segments include a left combined circular arc segment and a right combined circular arc segment. The left combined circular arc segment and the right combined circular arc segment are respectively composed of several circular arc segments. The several circular arc segments are set as 1 to N circular arc segments with different radii. Each circular arc segment is connected in sequence and satisfies the first-order continuity condition. According to the set rotation radius, a moving and static scroll profile structure that can be correctly meshed is generated through the generation baseline, and moving and static scrolls with differences are generated according to the moving and static scroll profile structure.

2. The combined arc non-symmetric variable wall thickness scroll disk according to claim 1, wherein: The left combined arc segment includes arc segment I connected in sequence L , arc segment II L , arc segment III L and arc segment IV L . The right combined arc segment includes arc segment I connected in sequence R , arc segment II R , arc segment III R and arc segment IV R . The left combined arc segment and the right combined arc segment completely define the structural parameters through the defined point set (θ i , R i ), and then generate the moving and static scroll profile structures with differences. In the formula, θ i represents the angular parameter of the i-th arc segment, and R i represents the radius of the i-th arc segment.

3. The combined circular arc asymmetric variable wall thickness scroll disk according to claim 1, characterized in that: The several circular arc segments of the left combined circular arc segment and the right combined circular arc segment are solved through the following expressions: where x i represents the abscissa of the i-th arc segment, y i represents the ordinate of the i-th arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th arc segment, R i represents the radius of the i-th arc segment, θ represents the angular parameter of the corresponding arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

4. The combined arc non-symmetric variable wall thickness scroll disk according to claim 3, characterized in that: The moving and static scroll profile structure is solved by equidistantly offsetting a fixed distance in the normal direction according to the coordinates of the generation baseline. The horizontal and vertical coordinates of the moving and static scroll profile structure in the rectangular coordinate system Oxy are solved according to the following formula: where D r is the rotational diameter of the moving scroll disk; n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the point on the generation baseline, and are solved through the following expressions:

5. A profile design method for a combined arc asymmetric variable wall thickness scroll disk as described in any one of claims 1 to 4, characterized in that, It includes the following steps: According to the requirements of displacement, sealing performance, and thermal dynamic characteristics, select the radius of gyration and the point set (θ i , R i ), where θ i represents the angular parameter of the i-th circular arc segment, and R i represents the radius of the i-th circular arc segment, to form a parameter set; Solve the several circular arc segments of the left combined circular arc segment and the right combined circular arc segment through the parameter set. Solve the horizontal and vertical coordinates of the unit vector of the normal vector of the points on the generation baseline of the moving and static scroll profile. According to the meshing relationship, solve the static scroll profile structure by equidistantly offsetting a fixed distance in the normal direction according to the coordinates of the generation baseline. Obtain moving and static scroll profile structures with differences and generate moving and static scrolls by defining different point sets.

6. The line profile design method according to claim 5, characterized in that: For the step of solving the several circular arc segments of the left combined circular arc segment and the right combined circular arc segment through the parameter set, the calculation expression is as follows: where x i represents the abscissa of the i-th circular arc segment, y i represents the ordinate of the i-th circular arc segment, x O,i and y O,i respectively represent the abscissa and ordinate of the center of the circle corresponding to the i-th circular arc segment, R i represents the radius of the i-th circular arc segment, θ represents the angular parameter of the corresponding circular arc segment, the subscript begin represents the starting value of the angular parameter, and end represents the ending value of the angular parameter.

7. The line profile design method according to claim 6, characterized in that: For the step of solving the horizontal and vertical coordinates of the unit vector of the normal vector of the points on the generation baseline of the moving and static scroll profile, the calculation expression is as follows: where n x and n y respectively represent the abscissa and ordinate of the unit vector of the normal vector of the points on the generation baseline.

8. The line profile design method according to claim 7, characterized in that: For the step of solving the static scroll profile structure by equidistantly offsetting a fixed distance in the normal direction according to the coordinates of the generation baseline according to the meshing relationship, the calculation expression is as follows: where D r is the rotational diameter of the moving scroll disk.

9. The line profile design method according to claim 5, characterized in that: For the step of obtaining moving and static scroll profile structures with differences and generating moving and static scrolls by defining different point sets, the differentiation of the moving and static scroll profile structure and the adjustment of the wall thickness of the moving and static scrolls at different positions are realized by defining different point sets, improving the thermal dynamic performance of the scroll machinery.

10. A computer-readable storage medium, characterized in that: At least one instruction is stored in the computer-readable storage medium, and the at least one instruction is executed by a processor in an electronic device to implement the profile design method according to any one of claims 5 to 9.

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