Full-molded-surface overload stop structure of corrugated diaphragm and production method of full-molded-surface overload stop structure

Abstract

The full-profile overload locking structure comprises a locking plate and a corrugated diaphragm, the corrugated diaphragm comprises a flat edge part, a corrugated part and a flat center part, and the locking plate is provided with matching parts which are the same as the flat edge part, the corrugated part and the flat center part in shape. The flat edge part, the corrugated part and the flat center part on the corrugated diaphragm are in full-profile fit with the corresponding matching parts respectively, and in a word, full-profile fit between the full-profile stop plate and the corrugated diaphragm in a pressed state is achieved, through full-profile fit between the stop plate and the corrugated diaphragm, the whole-profile fit between the stop plate and the corrugated diaphragm is achieved, and the whole-profile fit between the stop plate and the corrugated diaphragm is achieved. According to the utility model, each part of the corrugated diaphragm does not generate excessive deformation when the corrugated diaphragm bears overload pressure, the corrugated diaphragm is prevented from generating overlarge strain, the stress of the corrugated diaphragm is reduced, the pressure resistance and the fatigue life of the diaphragm are improved, and the corrugated diaphragm has the advantages of low cost, simple structure, good locking effect, difficulty in deformation, long service life and suitability for large-scale popularization.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated diaphragms, in particular to a corrugated diaphragm full-surface overload stop structure and a production method thereof. Background Art

[0002] The corrugated diaphragm is usually a circular diaphragm with concentric rings. The corrugated diaphragm is often divided into arc, sinusoidal, triangular, trapezoidal, etc. according to its shape. Its structure is as follows Figure 1 As shown in the figure, its surface structure is mainly divided into three parts: flat edge, corrugation and flat center. When the corrugated diaphragm is working, the flat edge part cooperates with other structures to realize the isolation between the upper and lower sides of the diaphragm. The corrugated part mainly realizes the elastic deformation after sensing the pressure, and the flat center part is used to output the displacement. The corrugated diaphragm is widely used in pressure sensitive elements such as pressure signal meters due to its good linearity of pressure-displacement curve.

[0003] However, in actual use, the corrugated diaphragm inevitably needs to withstand overload pressure. In order to prevent excessive deformation and failure under overload conditions, it is often necessary to design a specific stop structure on the back of the corrugated diaphragm to provide support under overload conditions. However, Figure 2 As shown, the conventional corrugated diaphragm stop structure includes a machined stop structure with a conical slope. Under the action of pressure, the wave crest of the diaphragm fits on the conical surface of the stop plate; Figure 3 In the mechanically processed stop structure with a step surface shown in the figure, under the action of pressure, each wave peak of the diaphragm fits with the corresponding stop step surface respectively. The above two stop structures have the characteristics of compact structure and easy processing, but the stop surface cannot completely match the shape of the diaphragm under the working strain state. It is only a line contact stop, the stopping method is single, and the stopping effect is not good. Under overload conditions, the diaphragm surface cannot be fully protected and is prone to deformation, thereby causing the diaphragm pressure-displacement characteristics to drift or even fail. Therefore, there is an urgent need for a corrugated diaphragm full-surface overload stop structure and a production method thereof to solve the above-mentioned problems. Summary of the invention

[0004] In view of this, the present invention proposes a corrugated diaphragm full-surface overload stop structure and a production method thereof, which are applied to the field of corrugated diaphragm technology to solve the technical problems that the existing diaphragm surface cannot be fully protected, is prone to deformation, has high diaphragm stress and short fatigue life.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A corrugated diaphragm full-surface overload stop structure comprises a stop plate and a corrugated diaphragm. The corrugated diaphragm comprises a flat edge portion, a corrugated portion and a flat center portion. Matching portions with the same shapes as the flat edge portion, the corrugated portion and the flat center portion are respectively arranged on the stop plate. The flat edge portion, the corrugated portion and the flat center portion on the corrugated diaphragm are respectively fitted with the corresponding full-surface of the matching portion.

[0007] Furthermore, the matching parts on the stop plate include a flat edge matching part, a corrugated matching part and a flat center matching part. The flat edge matching part is matched with the flat edge part in shape and is tightly set, the corrugated matching part is matched with the corrugated part in shape and is tightly set, and the flat center matching part is matched with the flat center part in shape and is tightly set.

[0008] A method for producing the corrugated diaphragm full-surface overload stop structure as described above comprises the following steps:

[0009] S1. Calculate the displacement of the center of the corrugated diaphragm under the corresponding working pressure and the axial displacement of each crest and trough of the corrugated diaphragm by simulation calculation method;

[0010] S2, designing the profile curve of the stop plate in the full-profile stop structure of the corrugated diaphragm, based on the profile curve of the corrugated diaphragm, each crest and trough of the profile curve of the corrugated diaphragm can be regarded as an arc, each arc can be regarded as connected by a common tangent line, and the axial position of each crest and trough of the profile curve of the diaphragm is adjusted based on the axial displacement calculated in step S1;

[0011] S3, make secondary adjustments to the profile curve, adjust the size of the corrugated profile formed in step S2, appropriately increase the crest arc, appropriately reduce the trough arc, and adjust the center positions of the crest and trough arcs in the radial direction of the diaphragm, wherein the adjustment size is set according to the working displacement of the diaphragm.

[0012] Furthermore, the simulation calculation method in step S1 includes the following steps:

[0013] S101, corrugated diaphragm design modeling;

[0014] S102, applying fixed constraints to the flat edge of the diaphragm;

[0015] S103, working pressure is applied to the corrugated area and the flat center area of ​​the diaphragm;

[0016] S104. Calculate the axial displacement of the diaphragm's crest, trough and flat center.

[0017] Furthermore, the adjustment of the axis position in step S2 refers to the adjustment of the axial position of the center of each crest and trough arc in the corrugated diaphragm. After the adjustment, each crest and trough arc is still connected by a common tangent line to form a complete corrugated profile.

[0018] Furthermore, in S3, the radius of the crest arc is increased by 5% to 15%, the radius of the trough arc is reduced by 5% to 15%, and the center positions of the crest and trough arcs are adjusted by 1% to 3% in the radial direction of the diaphragm.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention mentions a corrugated diaphragm full-surface overload stop structure and a production method thereof. Compared with the traditional stop structure, the full-surface stop structure maintains the advantages of the original structure with compact size and light weight, without adding redundant structural components. On the basis of the traditional unloading structure that only stops at the crest (i.e., line contact stop), it first ensures the surface contact stop of the crest and trough surface, and at the same time has a certain stopping effect on other areas, so that the back side of the load of the diaphragm has a better bearing surface under overload conditions, ensuring that the diaphragm does not deform axially while also ensuring that the diaphragm surface does not change, thereby improving the pressure resistance and fatigue life of the diaphragm.

[0021] 2. The present invention mentions a corrugated diaphragm full-surface overload stop structure and a production method thereof, which can efficiently determine the stop surface curve and cooperate with CNC lathe processing, with simple process, convenient assembly and good product consistency. It is suitable for the design of most corrugated diaphragm stop structures and has strong applicability. The design of the stop surface can be completed in the product design stage without the need for experiments and has low investment cost, so as to achieve efficient and low-cost research and development effects. For diaphragms with the same surface, the diaphragm stiffness can be changed by changing its thickness to make it suitable for pressure-sensitive components under different pressure conditions. At the same time, the design of its stop plate basically does not need to be adjusted, and it is very easy to achieve product promotion and industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments 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.

[0023] Figure 1 It is a schematic diagram of the structure of a traditional corrugated diaphragm in the background technology of the present invention;

[0024] Figure 2 It is a schematic structural diagram of a stop structure with a conical inclined surface machined in the background technology of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a stop structure with a step profile machined in the background technology of the present invention;

[0026] Figure 4It is a structural schematic diagram of a corrugated diaphragm full-surface overload stop structure in a specific embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the stop plate profile structure in a method for producing a corrugated diaphragm full-profile overload stop structure in a specific embodiment of the present invention;

[0028] Among them: 1. stop plate; 2. corrugated diaphragm; 3. flat edge part; 4. corrugated part; 5. flat center part. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any of the several aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the form, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0033] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0034] Example 1

[0035] A full-surface overload stop structure for a corrugated diaphragm 2 includes a stop plate 1 and a corrugated diaphragm 2. The corrugated diaphragm 2 includes a flat edge portion 3, a corrugated portion 4, and a flat center portion 5. Matching portions with the same shape as the flat edge portion 3, the corrugated portion 4, and the flat center portion 5 are respectively provided on the stop plate 1. The flat edge portion 3, the corrugated portion 4, and the flat center portion 5 on the corrugated diaphragm 2 are respectively in full-surface contact with the corresponding matching portions. The matching portions on the stop plate 1 include a flat edge matching portion, a corrugated matching portion, and a flat center matching portion. The flat edge matching portion matches the flat edge portion 3 in shape and is closely arranged. The corrugated matching portion matches the corrugated portion 4 in shape and is closely arranged. The flat center matching portion matches the flat center portion 5 in shape and is closely arranged.

[0036] A method for producing a full-surface overload stop structure of a corrugated diaphragm 2 comprises the following steps:

[0037] S1. Calculate the displacement of the center of the corrugated diaphragm 2 under the corresponding working pressure and the axial displacement of each crest and trough of the corrugated diaphragm 2 by a simulation calculation method. The simulation calculation method in step S1 includes the following steps:

[0038] S101, design and modeling of corrugated diaphragm 2;

[0039] S102, applying fixed constraints to the flat edge of the diaphragm;

[0040] S103, working pressure is applied to the corrugated area and the flat center area of ​​the diaphragm;

[0041] S104. Calculate the axial displacement of the diaphragm's crest, trough and flat center.

[0042] S2, designing the profile curve of the stop plate 1 in the full-profile stop structure of the corrugated diaphragm 2, based on the profile curve of the corrugated diaphragm 2, each crest and trough of the profile curve of the corrugated diaphragm 2 can be regarded as an arc, and each arc can be regarded as connected by a common tangent line, and the adjustment of the axis position in step S2 refers to the adjustment of the axial position of the center of each crest and trough arc in the corrugated diaphragm 2, after the adjustment, each crest and trough arc is still connected by a common tangent line to form a complete corrugated profile;

[0043] S3. Make secondary adjustments to the profile curve, increase the radius of the crest arc by 5% to 15%, reduce the radius of the trough arc by 5% to 15%, and adjust the center positions of the crest and trough arcs by 1% to 3% in the radial direction of the diaphragm.

[0044] The present invention mentions a full-surface overload stop structure for a corrugated diaphragm 2 and a production method thereof, wherein a full-surface stop plate 1 is adopted to achieve full-surface fitting with the corrugated diaphragm 2 under pressure, and the full-surface fitting of the stop plate 1 with the corrugated diaphragm 2 prevents the various parts of the corrugated diaphragm 2 from undergoing unnecessary deformation when subjected to overload pressure, thereby avoiding excessive strain of the corrugated diaphragm 2, reducing the stress of the corrugated diaphragm 2, and improving the pressure resistance and fatigue life of the diaphragm. The structure has the advantages of low cost, simple structure, good stopping effect, not prone to deformation, long service life, and suitability for large-scale promotion.

[0045] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A corrugated diaphragm (2) full-surface overload stop structure, characterized in that: The invention comprises a stop plate (1) and a corrugated diaphragm (2), wherein the corrugated diaphragm (2) comprises a flat edge portion (3), a corrugated portion (4) and a flat center portion (5), and the stop plate (1) is provided with matching portions having the same shape as the flat edge portion (3), the corrugated portion (4) and the flat center portion (5), respectively, and the flat edge portion (3), the corrugated portion (4) and the flat center portion (5) on the corrugated diaphragm (2) are respectively in full-surface contact with the corresponding matching portions.

2. A full-surface overload stop structure for a corrugated diaphragm (2) according to claim 1, characterized in that: The matching parts on the stop plate (1) include a flat edge matching part, a corrugated matching part and a flat center matching part. The flat edge matching part is matched in shape with the flat edge part (3) and is tightly arranged. The corrugated matching part is matched in shape with the corrugated part (4) and is tightly arranged. The flat center matching part is matched in shape with the flat center part (5) and is tightly arranged.

3. A method for producing a full-surface overload stop structure of a corrugated diaphragm (2) according to claim 1, characterized in that: The following steps are involved: S1. Calculate the displacement of the center of the corrugated diaphragm (2) under the corresponding working pressure and the axial displacement of each crest and trough of the corrugated diaphragm (2) by means of a simulation calculation method; S2, designing the profile curve of the stop plate (1) in the full-profile stop structure of the corrugated diaphragm (2), taking the profile curve of the corrugated diaphragm (2) as a basis, each crest and trough of the profile curve of the corrugated diaphragm (2) can be regarded as an arc, and each arc can be regarded as connected by a common tangent line, and adjusting the axial position of each crest and trough of the profile curve of the diaphragm based on the axial displacement calculated in step S1; S3, make secondary adjustments to the profile curve, adjust the size of the corrugated profile formed in step S2, appropriately increase the crest arc, appropriately reduce the trough arc, and adjust the center positions of the crest and trough arcs in the radial direction of the diaphragm, wherein the adjustment size is set according to the working displacement of the diaphragm.

4. The method for producing a full-surface overload stop structure of a corrugated diaphragm (2) according to claim 3, characterized in that: The simulation calculation method in step S1 comprises the following steps: S101, corrugated diaphragm (2) design and modeling; S102, applying fixed constraints to the flat edge of the diaphragm; S103, working pressure is applied to the corrugated area and the flat center area of ​​the diaphragm; S104. Calculate the axial displacement of the diaphragm's crest, trough and flat center.

5. The method for producing a full-surface overload stop structure of a corrugated diaphragm (2) according to claim 3, characterized in that: The adjustment of the axis position in step S2 refers to the adjustment of the axial position of the center of each crest and trough arc in the corrugated diaphragm (2). After the adjustment, each crest and trough arc is still connected by a common tangent line to form a complete corrugated profile.

6. The method for producing a full-surface overload stop structure of a corrugated diaphragm (2) according to claim 3, characterized in that: In step S3, the radius of the wave crest arc is increased by 5% to 15%, the radius of the wave trough arc is reduced by 5% to 15%, and the center positions of the wave crest and wave trough arcs are adjusted by 1% to 3% in the radial direction of the diaphragm.

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