Novel sealing structure suitable for air cylinder of large-diaphragm-cavity high-pressure diaphragm compressor

Abstract

The novel sealing structure comprises an air cavity, an oil cavity and a diaphragm set arranged between the air cavity and the oil cavity, sealing grooves are formed in the sides, close to the diaphragm set, of the air cavity and the oil cavity, and metal C-shaped rings are arranged in the sealing grooves. The utility model relates to the technical field of compressor air cylinder sealing, an existing two-layer sealing mode is improved into a multi-layer sealing mode, a plurality of hard contact sealing faces are formed by arranging the metal C-shaped ring and the sealing lines, layer-by-layer pressure reduction is achieved, the sealing effect is good, and the sealing effect is good. The sealing reliability of the diaphragm compressor cylinder is effectively improved, and the possibility of gas leakage is reduced; the metal C-shaped ring is adopted to replace an O-shaped rubber ring to serve as a main sealing piece, the strength is greatly improved, higher pressure can be borne, and the sealing problem of the large-diaphragm-cavity high-pressure diaphragm compressor air cylinder under high pressure is successfully solved.

Description

Technical Field

[0001] This utility model relates to the field of compressor cylinder sealing technology, specifically a novel sealing structure suitable for cylinders of large-diaphragm high-pressure diaphragm compressors. Background Technology

[0002] In the field of diaphragm compressors, large-cavity diaphragm compressors face severe challenges in increasing discharge pressure. Currently, the discharge pressure of large-cavity diaphragm compressors on the market can usually only reach around 500 bar. When attempting to further increase the pressure, their sealing reliability drops sharply. The existing combined sealing system consisting of O-ring seals and hard contact metal surface seals has many defects:

[0003] When the pressure inside the gas chamber rises to a certain level, the O-ring rubber ring can no longer withstand it and quickly fails, leading to rapid gas leakage. At the same time, the hard contact seal on the metal surface also fails.

[0004] When high-pressure gas leaks through the O-ring to the hard contact sealing surface, the gas can easily leak almost in a straight line along the poor contact area to the leakage alarm groove, making it difficult to effectively block the gas.

[0005] To enhance the sealing effect, existing technologies continuously improve the roughness and flatness of the hard sealing surface, which brings great difficulties to the processing and manufacturing.

[0006] Currently, most diaphragm compressors with exhaust pressures exceeding 700 bar and reliable sealing are small-cavity diaphragm compressors, with the diameter of the diaphragm compressing gas section being approximately 200 mm. Therefore, we need to design a more reliable new sealing structure to solve the current predicament. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a novel sealing structure suitable for cylinders of large-cavity high-pressure diaphragm compressors, solving the problems of poor sealing performance and time-consuming and labor-intensive processing and manufacturing of existing structures.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel sealing structure suitable for the cylinder of a large-diaphragm high-pressure diaphragm compressor, comprising an air chamber, an oil chamber, and a diaphragm assembly disposed between the air chamber and the oil chamber. Both the air chamber and the oil chamber are provided with a sealing groove on the side near the diaphragm assembly. A metal C-ring is disposed in the sealing groove. Several sealing lines are provided at intervals on the lower wall of the air chamber and outside the sealing groove.

[0009] Preferably, the sealing line is an annular groove structure.

[0010] Preferably, the number of sealing lines is at least three.

[0011] Preferably, a hard contact sealing surface is formed between the metal C-ring and the sealing line, as well as between adjacent sealing lines.

[0012] Preferably, the sealing grooves on the upper and lower sides are staggered.

[0013] Beneficial effects

[0014] This utility model provides a novel sealing structure suitable for cylinders of large-cavity high-pressure diaphragm compressors, which has the following beneficial effects:

[0015] The existing two-layer sealing form is improved into a multi-layer sealing form. By setting metal C-rings and multiple sealing lines, multiple hard contact sealing surfaces are formed to achieve layer-by-layer pressure reduction, which effectively improves the sealing reliability of the diaphragm compressor cylinder and reduces the possibility of gas leakage.

[0016] By replacing the O-ring with a metal C-ring as the main sealing element, its strength is greatly improved and it can withstand higher pressure. This successfully solves the sealing problem of the cylinder of the large-diaphragm diaphragm compressor under high pressure, enabling the large-diaphragm diaphragm compressor to operate reliably under exhaust pressure of over 700 bar.

[0017] Compared to existing technologies that continuously improve the roughness and flatness of hard sealing surfaces, this new sealing structure achieves multi-layer sealing by setting sealing lines, avoiding excessive reliance on high-precision machining of hard sealing surfaces and reducing the difficulty of processing and manufacturing.

[0018] This novel sealing structure is not only suitable for cylinders of large-diaphragm high-pressure diaphragm compressors, but its multi-layer sealing concept, combined with the O-ring and multi-layer hard seal, can also be applied to existing diaphragm compressor cylinders, effectively improving their sealing reliability and providing a universal and reliable solution for sealing diaphragm compressor cylinders with different pressures and diaphragm cavities. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1. Air chamber; 2. Oil chamber; 3. Diaphragm assembly; 4. Sealing groove; 5. Metal C-ring; 6. Sealing line. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 This utility model provides a technical solution: a novel sealing structure suitable for the cylinder of a large-diaphragm high-pressure diaphragm compressor, including an air chamber 1, an oil chamber 2, and a diaphragm assembly 3 disposed between the air chamber 1 and the oil chamber 2. Both the air chamber 1 and the oil chamber 2 are provided with a sealing groove 4 on the side near the diaphragm assembly 3. A metal C-ring 5 is disposed in the sealing groove 4. Several sealing lines 6 are disposed at intervals on the lower wall of the air chamber 1 and outside the sealing groove 4.

[0023] By adopting the above technical solution, a sealing groove 4 is set on the side of the gas chamber 1 and oil chamber 2 near the diaphragm assembly 3. A metal C-ring is installed in the groove as the main seal to block most of the high-pressure gas. Several sealing lines 6 are set on the outside of the sealing groove 4 on the lower wall of the gas chamber 1. When gas leaks through the metal C-ring, the sealing line 6 and the hard contact sealing surface it forms further block the gas. Through the combination of the metal C-ring and the sealing line 6, the traditional two-layer seal is transformed into a multi-layer seal, which significantly improves the sealing effect and solves the problem of high-pressure sealing of large diaphragm chambers.

[0024] In this embodiment, the sealing line 6 is further configured as an annular groove structure.

[0025] By adopting the above technical solution, the sealing line 6 is designed as an annular groove structure. When gas leaks into the sealing line 6, it will seek a weak point in the sealing in the circumferential direction of the annular groove to leak, which prolongs the gas leakage path and increases the difficulty of gas leakage.

[0026] In this embodiment, the number of sealing lines 6 is at least three.

[0027] By adopting the above technical solution, at least three sealing lines 6 are set to form multiple hard contact sealing surfaces, so that the gas is blocked and depressurized multiple times during the leakage process, and each sealing surface weakens the gas pressure.

[0028] In this embodiment, a hard contact sealing surface is formed between the metal C-ring 5 and the sealing line 6, as well as between adjacent sealing lines 6.

[0029] By adopting the above technical solution, a hard contact sealing surface is formed between the metal C-ring and the sealing line 6, as well as between adjacent sealing lines 6. When gas permeates between these sealing surfaces, it is blocked by the sealing surfaces, and the pressure gradually decreases. Multiple hard contact sealing surfaces work together to achieve layer-by-layer pressure reduction, effectively improving the sealing reliability of the sealing structure and ensuring that gas will not easily leak.

[0030] In this embodiment, the sealing grooves 4 on the upper and lower sides are staggered.

[0031] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0032] Example: When the gas pressure in gas chamber 1 increases, the metal C-ring first acts as the main seal. Due to its higher strength, the metal C-ring can withstand high pressure better than the original O-ring, effectively blocking most of the gas and preventing large-scale gas leakage. If a small amount of gas leaks through the metal C-ring, it will reach the hard sealing surface between the metal C-ring and the first sealing line 6. This hard sealing surface forms a second layer of seal, further blocking the gas. If the gas pressure is still high at this time, the second layer of seal cannot completely block the gas, and the gas will leak into the first sealing line 6. The sealing line 6 is an annular micro-groove. After the gas enters, it will look for the weakest point of the seal in the circumferential direction before leaking into the next layer of seal. After the gas leaks into the first sealing line 6, it will enter the hard sealing surface between the first sealing line 6 and the second sealing line 6, which is the third layer of seal. Its working principle is the same as the second layer of seal. And so on. After the gas passes through multiple layers of hard sealing surfaces for blocking and pressure reduction, the pressure gradually decreases and is eventually effectively blocked, preventing the gas from leaking into the leakage alarm slot and ensuring the sealing performance of the diaphragm compressor cylinder.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new sealing structure suitable for the cylinder of a high-pressure diaphragm compressor with large diaphragm chamber, comprising a gas chamber (1), an oil chamber (2) and a diaphragm group (3) arranged between the gas chamber (1) and the oil chamber (2), characterized in that, The air cavity (1) and the oil cavity (2) are provided with sealing grooves (4) on the side close to the diaphragm group (3), and metal C-shaped rings (5) are arranged in the sealing grooves (4); a plurality of sealing lines (6) are arranged on the lower wall of the air cavity (1) and outside the sealing grooves (4).

2. A new seal structure suitable for large membrane cavity high pressure diaphragm compressor cylinder according to claim 1, characterized in that, The sealing lines (6) are annular groove structures.

3. A novel seal structure suitable for large membrane cavity high pressure diaphragm compressor cylinder according to claim 2, characterized in that, The number of the sealing lines (6) is at least three.

4. A novel seal structure suitable for large membrane cavity high pressure diaphragm compressor cylinder according to claim 3, characterized in that, Hard contact sealing surfaces are formed between the metal C-shaped rings (5) and the sealing lines (6) and between adjacent sealing lines (6).

5. A novel seal structure suitable for large membrane cavity high pressure diaphragm compressor cylinder as claimed in claim 2, wherein, The sealing grooves (4) on the upper and lower sides are distributed in a staggered manner.

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