A diaphragm compressor with a membrane cavity profile edge correction and a profile design method

Abstract

A diaphragm compressor with membrane cavity profile edge correction and a profile design method, the diaphragm compressor has a membrane cavity profile formed by combining a first membrane cavity profile and a second membrane cavity profile according to a segmented proportion, the first membrane cavity profile is a single exponential membrane cavity profile, and the second membrane cavity profile is used for edge stress correction; the maximum stress of the middle part of the membrane cavity profile is reduced by adjusting the design parameters of the first membrane cavity profile, and the maximum stress of the edge part of the membrane cavity profile is reduced by adjusting the design parameters of the second membrane cavity profile; the first membrane cavity profile and the second membrane cavity profile are continuous, monotonous and without sharp points, forming a combined edge correction diaphragm compressor membrane cavity profile. Under the premise of meeting the design requirements, the design parameters of the first membrane cavity profile and the second membrane cavity profile are adjusted through multi-objective parameter optimization calculation. The present application can overcome the problems of insufficient optimization parameters and limited optimization range of traditional single exponential profile design, and can optimize the reliability of the diaphragm compressor and increase the service life of the diaphragm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diaphragm compressors, in particular to a diaphragm compressor with membrane cavity profile edge correction and a profile design method. BACKGROUND

[0002] A diaphragm compressor is a positive displacement compressor that separates the oil side and the gas side by a diaphragm. Its working principle is to drive the piston to reciprocate through the motor-driven crankshaft connecting rod, to realize the pressurization and pressure relief of high-pressure oil, and then to push the diaphragm through the high-pressure oil to realize the compression and discharge of gas. Due to its good sealing performance and large pressure ratio, the diaphragm compressor is widely used in the hydrogen energy industry, especially in hydrogen filling stations. However, the diaphragm life, volumetric efficiency and diaphragm head strength are key and difficult problems in the development process of diaphragm compressors. The diaphragm is a key component in the stable operation of the diaphragm compressor, and its working performance can directly affect the reliability of the compressor operation. In the process of diaphragm damage, the main damage forms are collapse, distortion, wear and tear, and mechanical fatigue. The damage of the diaphragm will cause the destruction of its mechanical properties, and even cause serious economic losses.

[0003] At present, the membrane cavity profile of the widely used diaphragm compressor in China is a single exponential small deflection membrane cavity profile. After long-term practice and verification, it has good reliability and practical basis. However, in the process of developing and designing new models of diaphragm compressors, the stress of the edge of the traditional single exponential membrane cavity profile increases significantly after increasing the maximum deflection of the membrane cavity. The same diaphragm compressor gas capacity and smaller stress can only be achieved by reducing the profile index or increasing the diaphragm diameter, and the parameter optimization range is limited. With the development of diaphragm compressor technology, the research and development of new models with high pressure and high speed, and the urgent need of market demand, the optimization of membrane cavity profile according to the theoretical stress calculation of diaphragm is beneficial to improve the reliability and reduce the cost of diaphragm compressors. SUMMARY

[0004] The purpose of the present application is to overcome the problems of insufficient optimization parameters and limited optimization range of traditional single exponential profile design, and to adapt to diversified market demand, optimize the reliability of diaphragm compressors and increase the service life of diaphragms.

[0005] In order to achieve the above purpose, the present application has the following technical solutions:

[0006] In a first aspect, a diaphragm compressor with edge-corrected diaphragm chamber profile is provided, in which a first diaphragm chamber profile and a second diaphragm chamber profile are combined according to a segmented ratio to form a diaphragm chamber profile of the diaphragm compressor, the first diaphragm chamber profile is a single exponential diaphragm chamber profile, and the second diaphragm chamber profile is used for edge stress correction; the maximum stress in the middle of the diaphragm chamber profile is reduced by adjusting the design parameters of the first diaphragm chamber profile, and the maximum stress in the edge of the diaphragm chamber profile is reduced by adjusting the design parameters of the second diaphragm chamber profile; the first diaphragm chamber profile and the second diaphragm chamber profile are continuous, monotonous and without sharp points, forming a combined edge-corrected diaphragm chamber profile of the diaphragm compressor.

[0007] As a preferred solution, the design parameters of the first diaphragm chamber profile and the second diaphragm chamber profile are adjusted by multi-objective parameter optimization calculation under the premise of meeting the design requirements.

[0008] In a second aspect, a diaphragm compressor diaphragm chamber profile design method with edge correction is provided, which includes:

[0009] A single exponential diaphragm chamber profile is designed according to design requirements.

[0010] The region with the maximum stress in the single exponential diaphragm chamber profile is obtained by stress analysis.

[0011] If the region with the maximum stress is concentrated in the edge of the diaphragm chamber, the single exponential diaphragm chamber profile is segmented to obtain the first diaphragm chamber profile and the second diaphragm chamber profile, the optimal curve segmented ratio is found, the second diaphragm chamber profile is corrected, and the edge stress is reduced.

[0012] The first diaphragm chamber profile and the second diaphragm chamber profile are combined, the maximum stress in the middle of the diaphragm chamber profile is reduced by adjusting the design parameters of the first diaphragm chamber profile, and the maximum stress in the edge of the diaphragm chamber profile is reduced by adjusting the design parameters of the second diaphragm chamber profile.

[0013] Multi-objective parameter optimization calculation is performed under the premise of meeting the design requirements, the design parameters of the first diaphragm chamber profile and the second diaphragm chamber profile are adjusted, and the diaphragm compressor diaphragm chamber profile is determined by comparative analysis.

[0014] As a preferred solution, when the single exponential diaphragm chamber profile is designed, the design requirements include design gas volume requirement, diaphragm material strength requirement, and design size requirement.

[0015] As a preferred solution, after the region with the maximum stress in the single exponential diaphragm chamber profile is obtained by stress analysis, it is judged:

[0016] If the region with the maximum stress is concentrated in the middle of the diaphragm chamber and is greater than the diaphragm material strength requirement, the single exponential diaphragm chamber profile is redesigned, the deflection of the single exponential profile and the diaphragm chamber radius are modified to reduce the stress in the center of the diaphragm chamber profile.

[0017] If the stress maximum area is concentrated in the middle of the film cavity and is less than the film material strength requirement, it is determined that the designed single exponential line has qualified mechanical properties, and no further modification is needed, and the final diaphragm compressor film cavity profile is determined.

[0018] As a preferred solution, the step of finding the optimal curve segment ratio and modifying the second film cavity profile to reduce the edge stress comprises:

[0019] The modified film cavity profile described by the following formula is designed:

[0020]

[0021] In the formula, X is the modified film cavity profile equation; HA is the first film cavity profile equation, i.e. the single exponential film cavity profile equation; HB is the second film cavity profile equation; r is the film cavity radius; x p is the proportion of the film cavity radius corresponding to the first film cavity profile to the maximum film cavity radius; R is the maximum film cavity radius;

[0022] The second film cavity profile equation HB satisfies the following expression:

[0023]

[0024] In the formula, D is the derivative operator symbol;

[0025] The following expression is satisfied at the connection point P of the first film cavity profile equation HA and the second film cavity profile equation HB:

[0026]

[0027] In the formula, indicates a mathematical symbol, and there is a unique solution;

[0028] The stress analysis of the modified film cavity profile that meets the conditions is performed, and the area with the maximum stress in the modified film cavity profile is obtained. If the edge stress is still greater than the set value, the segment ratio x p is reduced until the requirement is met.

[0029] As a preferred solution, the expression for multi-objective parameter optimization calculation under the premise of meeting the design requirements is as follows:

[0030]

[0031] In the formula, δ is the stress of the film cavity profile; V is the volume of the film cavity designed by the film cavity profile; R is the maximum radius of the film cavity profile.

[0032] In a third aspect, a diaphragm compressor film cavity profile design system for film cavity profile edge modification is provided, comprising:

[0033] The single-exponential membrane cavity profile design module is used for designing a single-exponential membrane cavity profile according to design requirements.

[0034] The stress analysis module is used for obtaining a region with maximum stress in the single-exponential membrane cavity profile by performing stress analysis.

[0035] The curve segmenting module is used for segmenting the single-exponential membrane cavity profile to obtain a first membrane cavity profile and a second membrane cavity profile if the region with maximum stress is concentrated at the edge of the membrane cavity, searching for an optimal curve segmenting ratio, and correcting the second membrane cavity profile to reduce edge stress.

[0036] The profile design parameter adjusting module is used for jointly using the first membrane cavity profile and the second membrane cavity profile, reducing maximum stress at a middle part of the membrane cavity profile by adjusting a first membrane cavity profile design parameter, and reducing maximum stress at an edge part of the membrane cavity profile by adjusting a second membrane cavity profile design parameter.

[0037] The multi-target parameter optimization module is used for performing multi-target parameter optimization calculation under the premise of meeting design requirements, adjusting the first membrane cavity profile design parameter and the second membrane cavity profile design parameter, and determining the membrane cavity profile of the diaphragm compressor by comparative analysis.

[0038] In a fourth aspect, an electronic device is provided, comprising:

[0039] The memory stores at least one instruction, and the processor executes the instruction stored in the memory to implement the diaphragm compressor membrane cavity profile design method with edge correction.

[0040] In a fifth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the diaphragm compressor membrane cavity profile design method with edge correction.

[0041] Compared with the prior art, the present application has at least the following beneficial effects:

[0042] By optimizing the design of the diaphragm compressor membrane cavity profile, it can be used as a correction and supplement to the traditional single-exponential diaphragm compressor profile, so that the traditional single-exponential diaphragm compressor profile has more profile design parameters and optimization methods to adapt to current diversified market demand and improve the diaphragm life and overall reliability of the diaphragm compressor. The present application can enhance the flexibility of profile design, adjust the stress distribution of the diaphragm of the diaphragm compressor, reduce the maximum stress, and improve the diaphragm life and overall reliability of the diaphragm compressor by correcting the edge profile on the basis of the traditional single-exponential membrane cavity profile design.

[0043] Further, the membrane cavity profile edge correction diaphragm compressor membrane cavity profile design method of the application has the advantages that the multi-profile parameter optimization design with the maximum stress, the membrane cavity radius and the membrane cavity volume as the optimization targets is beneficial to the adaptation of the membrane cavity profile to various specific industrial application scenarios, improves the overall performance and safety of the diaphragm compressor, and thus reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the application, and other related drawings can also be obtained by those skilled in the art without any creative labor on the basis of these drawings.

[0045] Figure 1 The flowchart of the membrane cavity profile edge correction diaphragm compressor membrane cavity profile design method of the embodiment of the application is shown in the figure.

[0046] Figure 2(a) is a single exponential membrane cavity profile perturbation curve diagram of a traditional diaphragm compressor with a membrane cavity radius R = 360 mm;

[0047] Figure 2(b) is a stress distribution curve diagram of a traditional diaphragm compressor with a membrane cavity radius R = 360 mm;

[0048] Figure 3(a) is a circular arc edge correction membrane cavity profile perturbation curve diagram of the embodiment of the application with a segmentation ratio x p = 0.9;

[0049] Figure 3(b) is a stress distribution curve diagram of the circular arc edge correction membrane cavity profile of the embodiment of the application with a segmentation ratio x p = 0.9;

[0050] Figure 4(a) is a circular arc edge correction membrane cavity profile perturbation curve diagram of the embodiment of the application with a segmentation ratio x p = 0.85;

[0051] Figure 4(b) is a stress distribution curve diagram of the circular arc edge correction membrane cavity profile of the embodiment of the application with a segmentation ratio x p = 0.85;

[0052] Figure 5(a) is a single exponential membrane cavity profile perturbation curve diagram of the embodiment of the application with a membrane cavity radius R = 371 mm;

[0053] Figure 5(b) is a stress distribution curve diagram of the single exponential membrane cavity profile of the embodiment of the application with a membrane cavity radius R = 371 mm;

[0054] Figure 6(a) is an elliptical edge correction membrane cavity profile perturbation curve diagram of the embodiment of the application with a segmentation ratio x p = 0.85;

[0055] Figure 6(b) is a stress distribution curve of the edge correction film cavity profile of the embodiment of the present application with x p = 0.85. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, other embodiments can be obtained by those skilled in the art without creative labor.

[0057] The embodiment of the present application discloses a diaphragm compressor with edge correction of film cavity profile, which is formed by combining a first film cavity profile and a second film cavity profile according to a segmented ratio. The first film cavity profile is a single exponential film cavity profile, and the second film cavity profile is used for edge stress correction. The maximum stress in the middle part of the film cavity profile is reduced by adjusting the design parameters of the first film cavity profile, and the maximum stress in the edge part of the film cavity profile is reduced by adjusting the design parameters of the second film cavity profile. The first film cavity profile and the second film cavity profile are combined to form a combined edge correction diaphragm compressor film cavity profile which is continuous, monotonous and without sharp points. The design parameters of the first film cavity profile and the second film cavity profile are adjusted by multi-objective parameter optimization calculation under the premise of meeting the design requirements.

[0058] As shown in the drawings, the diaphragm compressor film cavity profile design method of the embodiment of the present application includes: Figure 1

[0059] The first step STEP_1: first, based on the design requirements AIM, a single exponential film cavity profile meeting the conditions is designed according to the specific design requirements AIM such as design gas volume requirement, diaphragm material strength requirement and design size requirement.

[0060] The second step STEP_2: stress analysis is performed on the single exponential film cavity profile meeting the conditions to obtain the region with the maximum stress in the existing design film cavity profile.

[0061] The third step STEP_3: if the region with the maximum stress is concentrated in the middle of the film cavity and is greater than the diaphragm material strength requirement, it is necessary to return to STEP_1 to modify the single exponential profile deflection and the film cavity radius to reduce the central stress of the film cavity profile; if the region with the maximum stress is concentrated in the middle of the film cavity and is less than the diaphragm material strength requirement, it is indicated that the single exponential profile has good mechanical properties and does not need to be further modified, and enters the profile determination STEP_7; if the region with the maximum stress is concentrated in the edge of the film cavity, it enters the next step STEP_4 of the profile optimization design.

[0062] The fourth step STEP_4: an optimal curve segmented ratio x is found​p , the modified diaphragm chamber profile described by the following formula is designed:

[0063]

[0064] In the formula: X-modified diaphragm chamber profile equation; HA-first diaphragm chamber profile equation, which is a single exponential diaphragm chamber profile equation; HB-second diaphragm chamber profile equation; r-diaphragm chamber radius; x p -the proportion of the diaphragm chamber radius corresponding to the first diaphragm chamber profile to the maximum diaphragm chamber radius; R-maximum diaphragm chamber radius.

[0065] The single exponential diaphragm chamber profile equation used in a general diaphragm compressor can be described by the following formula:

[0066]

[0067] In the formula: HA max is the maximum deflection of the single exponential diaphragm chamber profile; z is the index of the single exponential diaphragm chamber profile.

[0068] The second diaphragm chamber profile equation should satisfy the following expression:

[0069]

[0070] In the formula: D is the derivative operator symbol.

[0071] At the connection point P of the first diaphragm chamber profile equation HA and the second diaphragm chamber profile equation HB, the following expression should be satisfied:

[0072]

[0073] In the formula: -mathematical symbol, there is a unique solution.

[0074] Fifth step STEP_5: stress analysis is performed on the modified diaphragm chamber profile that meets the conditions to obtain the region with the maximum stress in the modified diaphragm chamber profile, and if the edge stress is still large, the segmentation ratio x p needs to be reduced.

[0075] Sixth step STEP_6: the selected single exponential profile HA and the second diaphragm chamber profile HB are combined, the maximum stress in the middle part of the diaphragm chamber profile is reduced by adjusting the design parameters of the single exponential profile HA, the maximum stress in the edge part of the diaphragm chamber profile is reduced by adjusting the design parameters of the second diaphragm chamber profile HB, and multi-objective parameter optimization calculation is performed under the premise of meeting the design requirements AIM. The parameter optimization process can be described by the following formula:

[0076]

[0077] Where: δ - stress of the membrane cavity profile; V - volume of the designed membrane cavity of the membrane cavity profile; R - maximum radius of the membrane cavity profile.

[0078] STEP_7: Determine the final profile parameters by comparative analysis.

[0079] Example 2

[0080] STEP_1: Single exponential profile design

[0081] A single exponential membrane compressor membrane cavity profile has the following profile design parameters: single exponential membrane cavity profile HA max

[0082] = 10.5 mm, single exponential membrane cavity profile exponent z = 7.2; maximum radius of the single exponential membrane cavity profile R = 360 mm.

[0083] STEP_2: Single exponential profile stress analysis

[0084] Further, as shown in FIG. 2(a) and FIG. 2(b), the different stress conditions in the radial direction of the above-mentioned single exponential membrane cavity profile are calculated, and it can be seen that the stress at the edge of the profile is large and higher than the allowable membrane cavity stress intensity δ 许用 = 210 MPa.

[0085] STEP_3: Edge stress concentration needs to be corrected

[0086] Further, the above-mentioned membrane cavity edge profile is corrected. The segment ratio x p is selected by the following formula:

[0087] δ(x p R) = δ 许用

[0088] From this, the segment point of the single exponential profile HA and the second membrane cavity profile HB can be estimated. First, x p = 0.9.

[0089] STEP_4: Correct the edge profile with a circular arc

[0090] Alternatively, the second membrane cavity profile HB is designed as a circular arc segment. In general, the circular arc segment profile can be described as:

[0091] (x-X circle ) 2 +(y-Y circle ) 2 = 1

[0092] Where: (X circle , Y circle ) - circular arc segment center coordinates; (x, y) - coordinates of any point.

[0093] The circular segment profile equation can be solved by the aforementioned profile design method as follows:

[0094]

[0095] STEP_5: Correct the profile stress analysis, the stress is large, need to return to STEP_4

[0096] Further, as shown in FIG. 3(a) and FIG. 3(b), the stress distribution of the combined correction diaphragm cavity profile X is calculated by stress analysis, and it can be seen that the stress at the edge is still large and exceeds the allowable stress of the diaphragm.

[0097] Again, STEP_4: adopt a circular arc to correct the edge profile

[0098] Further, adjust the segment point, take x p = 0.85, recalculate the circular arc profile equation as follows:

[0099]

[0100] Again, STEP_5: correct the profile stress analysis

[0101] Further, as shown in FIG. 4(a) and FIG. 4(b), the stress distribution of the above combined correction diaphragm cavity profile X is calculated by stress analysis, and it can be seen that the stress at the edge is significantly reduced, and the overall diaphragm maximum stress is less than the allowable stress of the diaphragm.

[0102] STEP_6:

[0103] (1) Single exponential profile comparative analysis

[0104] Further, as shown in FIG. 5(a) and FIG. 5(b), the stress distribution of the traditional single exponential profile of the diaphragm cavity radius R = 371mm is compared and calculated, and it can be seen that although the diaphragm cavity radius R is adjusted, the stress at the edge is still large. The above edge diaphragm cavity correction profile X has obvious advantages.

[0105] (2) Elliptical correction profile comparative analysis

[0106] Optionally, the second diaphragm cavity profile HB is designed as an elliptical segment, and the general elliptical segment profile can be described as:

[0107]

[0108] In the formula: (X elliptical , Y elliptical )- Elliptical segment center coordinates.

[0109] Take the segment point x p=0.85, the elliptical segment profile equation can be solved by the foregoing profile design method as follows:

[0110]

[0111] Further, as shown in FIGS. 6(a) and 6(b), stress analysis is performed on the combined modified diaphragm cavity profile X, and the stress distribution is calculated, and it can be seen that the stress at the edge is also significantly reduced, and the overall diaphragm stress is less than the allowable stress. Therefore, the edge-modified diaphragm compressor profile can reduce the edge diaphragm cavity stress and meet the allowable stress requirement.

[0112] (3) Comparative analysis of different profiles

[0113] Further, the diaphragm cavity volume V and maximum stress δ of the above different profile schemes max The comparison is shown in the following table:

[0114]

[0115] STEP_7: Profile determination

[0116] Further, an edge-modified diaphragm compressor diaphragm cavity profile and an optimization design method, in the embodiment, the stress distribution of the circular arc and elliptical modified profile is good, and it can be used as a preferred scheme.

[0117] Thus, an edge-modified diaphragm compressor diaphragm cavity profile and an optimization design method are realized, which can be used as a modification supplement of the traditional single-exponential diaphragm compressor profile, so that the traditional single-exponential diaphragm compressor profile has more profile design parameters and optimization methods, and is suitable for current diversified market demand, and improves the diaphragm life and overall reliability of the diaphragm compressor.

[0118] The embodiment of the present application also proposes an electronic device, characterized in that it comprises:

[0119] The memory stores at least one instruction, and the processor executes the instruction stored in the memory to realize the diaphragm cavity profile edge-modified diaphragm compressor diaphragm cavity profile design method.

[0120] The embodiment of the present application also proposes a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the diaphragm cavity profile edge-modified diaphragm compressor diaphragm cavity profile design method.

[0121] For example, the instructions stored in the memory can be divided into one or more modules / units, which are stored in the computer readable storage medium and executed by the processor to complete the diaphragm compressor membrane cavity profile design method of the membrane cavity profile edge correction of the diaphragm. The one or more modules / units can be a series of computer readable instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the server.

[0122] The electronic device can be a smart phone, a notebook, a palm computer, a cloud server and the like. The electronic device can include, but is not limited to, a processor, a memory. Those skilled in the art can understand that the electronic device can further include more or less components, or combine certain components, or different components, for example, the electronic device can further include an input / output device, a network access device, a bus and the like.

[0123] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0124] The memory can be an internal storage unit of the server, such as a hard disk or a memory of the server. The memory can also be an external storage device of the server, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card and the like. Further, the memory can include both the internal storage unit and the external storage device of the server. The memory is used to store the computer readable instructions and other programs and data required by the server. The memory can also be used to temporarily store data that has been output or will be output.

[0125] It should be noted that the information interaction, execution process and the like between the above-mentioned module units, since based on the same concept as the method embodiment, the specific functions and the technical effects brought by it can be referred to the method embodiment part, and will not be repeated here.

[0126] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is 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 one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software function unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the application. The specific working process of the unit and module in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0127] The integrated unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the foregoing embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium. When the processor executes the computer program, the steps of each method embodiment can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium at least includes any entity or device capable of carrying the computer program code to the photographing device / terminal equipment, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc.

[0128] In the foregoing embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0129] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for designing a membrane cavity profile of a diaphragm compressor, characterized in that, The method comprises the following steps: designing a single-exponential membrane cavity profile according to design requirements; performing stress analysis to obtain a region with maximum stress in the single-exponential membrane cavity profile; if the region with maximum stress is concentrated at the edge of the membrane cavity, segmenting the single-exponential membrane cavity profile to obtain a first membrane cavity profile and a second membrane cavity profile, finding an optimal curve segmentation ratio, and modifying the second membrane cavity profile to reduce edge stress; combining the first membrane cavity profile and the second membrane cavity profile, adjusting the design parameters of the first membrane cavity profile to reduce the maximum stress in the middle part of the membrane cavity profile, and adjusting the design parameters of the second membrane cavity profile to reduce the maximum stress at the edge of the membrane cavity profile; performing multi-objective parameter optimization calculation under the premise of meeting the design requirements, adjusting the design parameters of the first membrane cavity profile and the second membrane cavity profile, and determining the membrane cavity profile of the diaphragm compressor through comparative analysis.

2. The method of claim 1, wherein the membrane cavity profile edge correction of a diaphragm compressor membrane cavity profile design method is characterized by, When designing the single-exponential membrane cavity profile, the design requirements include design gas volume requirements, diaphragm material strength requirements, and design size requirements.

3. The method of claim 1, wherein the membrane cavity profile edge correction of a diaphragm compressor membrane cavity profile design method is characterized by, After performing stress analysis to obtain the region with maximum stress in the single-exponential membrane cavity profile, it is determined: if the region with maximum stress is concentrated in the middle of the membrane cavity and is greater than the diaphragm material strength requirement, redesigning the single-exponential membrane cavity profile, modifying the single-exponential profile deflection and the membrane cavity radius to reduce the central stress of the membrane cavity profile; if the region with maximum stress is concentrated in the middle of the membrane cavity and is less than the diaphragm material strength requirement, it is determined that the designed single-exponential profile has qualified mechanical properties and does not need to be modified, and is determined as the final membrane cavity profile of the diaphragm compressor.

4. The method of diaphragm compressor diaphragm pocket profile design according to claim 1, characterized in that, The step of finding an optimal curve segmentation ratio, modifying the second membrane cavity profile to reduce edge stress, comprises: designing a modified membrane cavity profile described by the following formula: In the formula: is the first membrane cavity profile equation, i.e., the single-exponential membrane cavity profile equation; is the first membrane cavity profile equation, i.e., the single-exponential membrane cavity profile equation; is the second membrane cavity profile equation; is the membrane cavity radius; is the proportion of the membrane cavity radius corresponding to the first membrane cavity profile to the maximum membrane cavity radius; is the maximum membrane cavity radius; Second membrane cavity profile equation satisfies the following expression: In the formula, is a derivative operator At the junction point P of the first membrane cavity profile equation and the second membrane cavity profile equation the following expression is satisfied: In the formula, represents a mathematical symbol, there is a unique solution; Perform stress analysis on the corrected membrane cavity profile that meets the conditions to obtain the area with the maximum stress in the corrected membrane cavity profile. If the edge stress is still greater than the set value, reduce the segment ratio. , until the requirements are met.

5. The method of diaphragm compressor diaphragm pocket profile design of the edge correction of the diaphragm pocket profile of claim 1, characterized in that, The expression of performing multi-objective parameter optimization calculation under the premise of meeting the design requirements is as follows: wherein: is the stress of the membrane cavity profile; is the volume of the membrane cavity designed for the membrane cavity profile; is the maximum radius of the membrane cavity profile.

6. A diaphragm compressor of the membrane cavity profile edge correction type, characterized in that, The membrane cavity profile of the diaphragm compressor is obtained by the method for designing a membrane cavity profile of a diaphragm compressor according to the edge modification of the membrane cavity profile in any one of claims 1 to 5, the membrane cavity profile of the diaphragm compressor is formed by combining a first membrane cavity profile and a second membrane cavity profile according to a segmentation ratio, the first membrane cavity profile is a single-exponential membrane cavity profile, and the second membrane cavity profile is used for edge stress modification; the maximum stress in the middle part of the membrane cavity profile is reduced by adjusting the design parameters of the first membrane cavity profile, and the maximum stress at the edge of the membrane cavity profile is reduced by adjusting the design parameters of the second membrane cavity profile; the first membrane cavity profile and the second membrane cavity profile are continuous, monotonous, and without sharp points, forming a combined edge-modified membrane cavity profile of the diaphragm compressor.

7. The diaphragm compressor of claim 6, wherein: The design parameters of the first membrane cavity profile and the second membrane cavity profile are adjusted by performing multi-objective parameter optimization calculation under the premise of meeting the design requirements.

8. A diaphragm compressor diaphragm chamber profile design system for diaphragm chamber profile edge correction, characterized by, The method comprises the following steps: a single-exponential membrane cavity profile design module for designing a single-exponential membrane cavity profile according to design requirements; a stress analysis module for performing stress analysis to obtain a region with maximum stress in the single-exponential membrane cavity profile; a curve segmentation module for segmenting the single-exponential membrane cavity profile to obtain a first membrane cavity profile and a second membrane cavity profile if the region with maximum stress is concentrated at the edge of the membrane cavity, finding an optimal curve segmentation ratio, and modifying the second membrane cavity profile to reduce edge stress; A profile design parameter adjustment module is used to combine the first membrane cavity profile and the second membrane cavity profile, reduce the maximum stress in the middle of the membrane cavity profile by adjusting the design parameters of the first membrane cavity profile, and reduce the maximum stress in the edge of the membrane cavity profile by adjusting the design parameters of the second membrane cavity profile; The multi-objective parameter optimization module is used to perform multi-objective parameter optimization calculations on the premise of meeting design requirements, adjust the design parameters of the first membrane cavity profile and the second membrane cavity profile, and determine the membrane cavity profile of the diaphragm compressor through comparative analysis.

9. An electronic device, comprising: include: a memory storing at least one instruction; and A processor executes instructions stored in the memory to implement the diaphragm compressor diaphragm cavity profile design method with diaphragm cavity profile edge correction as described in any one of claims 1 to 5.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. When the computer program is executed by a processor, the method for designing the diaphragm cavity profile of a diaphragm compressor by correcting the edge of the diaphragm cavity profile as described in any one of claims 1 to 5 is implemented.

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