A sealing structure and pressure device

Abstract

The application relates to the technical field of compressor equipment, in particular to a sealing structure and pressure equipment. The sealing structure is arranged at the connection position of a muffler and a body equipment of pressure equipment, and comprises a sealing groove and a flowable sealing piece. The sealing groove is arranged at the connection position of a shell and the body equipment and is annularly arranged at the outer periphery of the exhaust part of the body equipment. The flowable sealing piece is arranged in the sealing groove, and when the exhaust part of the body equipment exhausts to a certain value in the sound attenuation cavity, the flowable sealing piece at least partially flows from one side of the sealing groove to the other side of the sealing groove and fills the fit gap between the shell and the body equipment. In the application, the fit gap between the muffler and the body equipment is sealed by the flowable sealing piece when the muffler is used, so that the sealing effect is effectively improved and energy loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of compressor equipment technology, and in particular to a sealing structure and pressure device. Background Technology

[0002] Compressors are widely used in equipment such as air conditioners, and they are gradually developing towards higher energy efficiency and lower noise.

[0003] In air conditioning equipment, after the refrigerant gas passes through the compressor, it is discharged into the lower chamber of the motor through the exhaust port. The high-pressure gas compressed by the compressor generates significant exhaust noise as it passes through the exhaust port, making this part of the exhaust noise a major source of aerodynamic noise. At this point, a muffler can be used to slow down the high-pressure airflow pulsation and reduce exhaust noise.

[0004] Most existing compressors use flat seals for their flanges and mufflers at the connection points. Since mufflers are generally stamped parts, the flatness at the connection point between the muffler and the flange is poor after demolding. Therefore, the sealing performance at the connection point between the muffler and the flange is poor, which may lead to exhaust leakage and energy loss. Summary of the Invention

[0005] In view of this, the present invention provides a sealing structure and a compressor that solves the problem of energy loss caused by poor sealing between the muffler and the pressure device in existing compressors.

[0006] A first aspect of the present invention provides a sealing structure disposed between a muffler and the main body of a pressure device. The muffler includes a housing that covers the exhaust portion of the main body device and forms a silencing cavity communicating with the exhaust portion.

[0007] The sealing structure includes:

[0008] A sealing groove is provided at the connection between the housing and the main body device, and surrounds the outer periphery of the exhaust portion of the main body device;

[0009] A flowable seal is disposed in the sealing groove. When the exhaust portion of the main body device exhausts a certain amount of gas into the silencing cavity, the flowable seal at least partially flows from one side of the sealing groove to the other side of the sealing groove and fills the mating gap between the housing and the main body device.

[0010] In some embodiments, the flowable seal is made of a flowable sealing material with a compression ratio of 10% to 22% and a viscosity of 0.1 to 0.3 Pa·s.

[0011] In some embodiments, the fluid seal is configured as an O-ring.

[0012] In some embodiments, multiple sealing grooves are provided, and the multiple sealing grooves are arranged sequentially from the inside of the silencing cavity to the outside of the silencing cavity;

[0013] Each of the sealing grooves is provided with a corresponding fluid seal.

[0014] In some embodiments, the sealing groove includes a first groove disposed on the main body device and a second groove disposed on the housing, the second groove being disposed opposite to the first groove, and the bottom of the first groove being provided with a corrugated portion;

[0015] When the fluid seal is in the sealing groove, the bottom of the fluid seal contacts the corrugated portion and forms a corrugated sealing section, and the area of ​​the corrugated sealing section is greater than the contact area between the fluid seal and the bottom of the second groove.

[0016] In some embodiments, the inner side of the silencing cavity faces the outer side of the silencing cavity, and the bottom of the first groove is provided with a plurality of spaced groove sections;

[0017] When the fluid seal is in the sealing groove, the position where the fluid seal contacts the corrugated portion in the first groove is squeezed into multiple groove sections to form the corrugated sealing section.

[0018] In some embodiments, the number of grooved sections is at least two, and the grooved sections have a symmetrical structure.

[0019] In some embodiments, the number of grooved sections is at least two;

[0020] The inner side of the silencing cavity faces the outer side of the silencing cavity. The groove section includes a first section and a second section that are connected to each other. The first section is arranged in an upward oblique direction, and the second section is arranged in a downward oblique direction. The inclination angle of the first section is smaller than that of the second section.

[0021] In some embodiments, when the fluid seal is located within the sealing groove, the width of the fluid seal is defined as D1, and the width of each groove section is defined as d.

[0022] The following relationship exists between the width D1 of the fluid seal and the width d of the groove section: the product of the widths d of N groove sections is greater than the width D1 of the fluid seal.

[0023] In some embodiments, the groove section includes crests and troughs, and a first vertical distance between the crests and the troughs is defined as h1; and a second vertical distance between the bottom of the first groove and the troughs is defined as H1;

[0024] The first vertical distance h1 and the second vertical distance H1 have the following relationship: 0.1H1 < h1 < 0.55H1.

[0025] A second aspect of the present invention provides a pressure device, the pressure device comprising: a body device, a silencer, and a sealing structure for sealingly connecting the body device and the silencer;

[0026] The sealing structure includes the sealing structure described in the first aspect.

[0027] In some embodiments, when the muffler is connected to the main body device, the side of the movable seal facing the inside of the muffler cavity is a predetermined distance from the sidewall of the sealing groove.

[0028] In some embodiments, when the muffler and the body device are within the sealing groove, the diameter of the fluid seal is defined as D, and the fitting clearance is defined as L;

[0029] The diameter D of the fluid seal is related to the working pressure M of the muffler and the fitting clearance L, wherein when 1 MPa ≤ M ≤ 3 MPa, 0.02D ≤ L ≤ 0.1D;

[0030] as well as,

[0031] When M > 3 MPa, L ≤ 0.05D.

[0032] In some embodiments, the pressure device is a compressor, the main device is the compressor body, and the silencer is connected to the flange of the compressor.

[0033] Compared with the prior art, the main advantages of the present invention are as follows:

[0034] In the sealing structure and pressure device of the present invention, the sealing structure is disposed at the connection between the muffler and the main body of the pressure device. The sealing structure includes a sealing groove and a flowable seal. The sealing groove is disposed at the connection between the housing and the main body and surrounds the outer periphery of the exhaust portion of the main body. The flowable seal is disposed within the sealing groove. When the exhaust portion of the main body exhausts a certain amount of gas into the muffler cavity, the flowable seal flows at least partially from one side of the sealing groove to the other side and fills the mating gap between the housing and the main body. In the present invention, when the muffler is in use, the flowable seal provides a zero-gap seal between the muffler and the main body, thereby effectively improving the sealing effect and reducing energy loss. Attached Figure Description

[0035] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0036] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0037] Figure 1 This is a schematic diagram of the structure of a compressor according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the installation position of a fluid seal in a compressor according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of a sealing structure according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a sealing structure according to an embodiment of the present invention, in which a fluid seal is located in a sealing groove and the compressor is in operation.

[0041] Figures 5 to 7 This is a schematic diagram of a sealing structure in which a fluid sealant forms a zero-gap seal according to an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of another structure of the sealing groove in a sealing structure according to an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the installation position of a fluid seal in a sealing structure according to an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of a sealing groove in a sealing structure according to an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of another structure of the sealing groove in a sealing structure according to an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Sealing structure; 110. Sealing groove; 111. First groove; 112. Second groove; 111a. Corrugated section; 111b. Groove joint; 120. Flowable seal; b1. First section; b2. Second section;

[0048] 200. Muffler;

[0049] 300. Main equipment;

[0050] 400. Fit clearance;

[0051] d, groove width; D, diameter of the flowable seal; D1, width of the flowable seal; h1, first vertical distance; H1, second vertical distance. Detailed Implementation

[0052] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0054] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0055] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0056] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0057] like Figures 1 to 11 As shown, an exemplary embodiment of the present invention provides a sealing structure 100 disposed between a muffler 200 and the main body 300 of a pressure device. The muffler 200 includes a housing that covers the exhaust position of the main body 300 and forms a silencing cavity communicating with the exhaust portion.

[0058] The sealing structure 100 is disposed in the contact area between the muffler 200 and the main body device 300, and the contact area is as follows: Figure 1 As shown in the X position. The main unit 300 can be a compressor.

[0059] The sealing structure 100 includes a sealing groove 110 and a flowable seal 120. The sealing groove 110 is located at the connection between the housing and the main body device 300 and surrounds the outer periphery of the exhaust portion of the main body device 300.

[0060] The sealing groove 110 can be provided on the housing of the muffler 200, or on the main body device 300, or the sealing groove 110 can be provided on both the housing of the muffler 200 and the main body device 300.

[0061] The fluid seal 120 is disposed in the sealing groove 110. When the exhaust portion of the main body device 300 exhausts into the silencing cavity to a certain value, the fluid seal 120 flows at least partially from one side of the sealing groove 110 toward the other side of the sealing groove 110 and fills the mating gap 400 between the housing and the main body device 300.

[0062] The flowable seal 120 can be an O-ring made of high-temperature resistant vulcanized rubber or plasticized rubber. Such a flowable seal 120 is elastic at room temperature but exhibits fluidity under specific temperatures or pressures. Specifically, when the temperature or pressure rises to a certain critical point, the O-ring changes from an elastic state to a viscous flow state, becoming a high-viscosity fluid that can flow.

[0063] For example, under high pressure or at temperatures above 50°C, the partially fluid seal 120, which becomes viscous, flows from the side with high pressure to the side with low pressure, so as to be squeezed into the mating gap 400 between the silencer 200 and the main body device 300, thereby achieving a better sealing effect.

[0064] It should be noted that the molecular structure and molecular weight of vulcanizates affect their flowability at specific temperatures or pressures. Vulcanizates or plasticized rubbers with flexible molecular chains and low glass transition temperatures have good flowability; conversely, vulcanizates or plasticized rubbers with large molecular weights and long molecular chains have poor flowability.

[0065] When fabricating the vulcanized rubber O-ring used in this example, shear force can be applied to the vulcanized rubber to reduce friction within the vulcanized structure, thereby improving its flowability. Alternatively, a vulcanization temperature of 140–180°C can be used to prepare the vulcanized rubber O-ring.

[0066] The plasticized rubber is a natural vulcanized rubber, or a low molecular weight depolymerized vulcanized rubber made by high-temperature catalytic mixing. In this case, non-recoverable mineral oil can be added to the plasticized rubber to achieve a zero-gap seal between the muffler 200 and the main body equipment 300.

[0067] When the muffler 200 and the main body device 300 are connected, the flowable seal 120 can be in a slightly compressed state. Specifically, when the muffler 200 is in operation, because the inner side of the muffler 200 is under high pressure while the outer side is under normal pressure, the portion of the flowable seal 120 near the mating gap 400 forms an incompressible, high-viscosity fluid state with high surface tension. This fluid portion of the flowable seal 120 flows towards the mating gap 400 between the muffler 200 and the main body device 300 in a direction from the inner side of the muffler 200 to the outer side, forming a zero-gap seal. This effectively improves the sealing effect and reduces energy loss.

[0068] It should be noted that the incompressibility of the fluid portion of the flowable seal 120 means that the fluid deformation volume of the flowable seal 120 remains unchanged during the flow process.

[0069] like Figures 1 to 11 As shown, in some embodiments, the flowable seal 120 is made of a flowable sealing material with a compression ratio of 10% to 22% and a viscosity of 0.1 to 0.3 Pa·s (Pascal-seconds).

[0070] Specifically, the fluid seal 120 is configured as an O-ring so that the fluid seal 120 can adapt to the fitting gap 400 of the annular structure formed between the housing of the muffler 200 and the main body device 300.

[0071] It should be noted that setting the compression ratio of the fluid seal 120 within this range ensures that the fluid seal 120 has a certain amount of compressibility deformation, while also ensuring that the fluid seal 120 has a good sealing effect when it is under slight compression.

[0072] In a specific example, the preferred range of compression ratio for the fluid seal 120 is 15% to 20%. When the muffler 200 and the main body device 300 are connected, the fluid seal 120 is in a slightly compressed state. The fluid seal 120 can be made of explosion-proof rubber sealing ring made of high-temperature resistant material. In the direction from the inside to the outside of the muffler 200, the pressure on the inside of the fluid seal 120 is greater than the pressure on the outside. At this time, in addition to the compressive force in the height direction, the fluid seal 120 is also subjected to the exhaust pressure of the compressor in the width direction. The 15% to 20% compression rate of the fluid seal 120 will form a compressible fluid with a high surface tension, which is a "high viscosity fluid". This fluid fluid of the fluid seal 120 will flow into the fitting gap 400 between the muffler 200 and the main body 300, thereby forming a zero fitting gap seal without damaging the internal structure of the fluid seal 120.

[0073] like Figures 3 to 7 As shown, in some embodiments, multiple sealing grooves 110 may be provided, and the multiple sealing grooves 110 are arranged sequentially from the inside of the silencing cavity to the outside of the silencing cavity.

[0074] Each sealing groove 110 is provided with a corresponding flowable seal 120.

[0075] In this example, multiple sealing grooves 110 can be coaxially arranged, and multiple flowable seals 120 can effectively ensure the sealing effect on the mating gap 400. Furthermore, even if some flowable seals 120 are damaged, the remaining flowable seals 120 can still provide a good sealing effect.

[0076] like Figures 3 to 11 As shown, in some embodiments, the sealing groove 110 includes a first groove 111 and a second groove 112, the first groove 111 and the second groove 112 are arranged opposite to each other, the first groove 111 is arranged on the main body device 300, the second groove 112 is arranged on the muffler 200, and a corrugated portion 111a is provided in the first groove 111.

[0077] The first groove 111 can be an annular groove, and the cross-sectional shape of the annular groove is square or rectangular. The corrugated part 111a is provided at the bottom of the first groove 111. It should be noted that the bottom of the first groove 111 is located on the side opposite to the plane where the top of the second groove 112 is located.

[0078] The two sides of the second groove 112 are vertical surfaces.

[0079] The fluid seal 120 can be accommodated in the sealing groove 110. That is, when the muffler 200 and the main body device 300 are arranged opposite each other and are connected, the fluid seal 120 is placed in the sealing groove 110 to perform the sealing function.

[0080] When the muffler 200 and the main body device 300 are connected, the fluid seal 120 can be in a slightly compressed state. That is, the bottom of the first groove 111 and the top of the second groove 112 form a relative compression on the bottom and top surfaces of the fluid seal 120, causing the fluid seal 120 to deform relative to each other. This results in a corrugated sealing section being formed between the bottom surface of the fluid seal 120 and the corrugated portion 111a. The area of ​​the corrugated sealing section is larger than the contact area between the fluid seal 120 and the bottom of the second groove 111.

[0081] In this example, the muffler 200 is installed on the flange of the main device 300, such as a compressor. When the compressor is running, the internal exhaust pressure causes the air pressure inside the muffler 200 to be greater than the air pressure outside the cavity. At this time, the corrugated sealing section formed at the bottom of the fluid seal 120 when it is compressed can be used. Combined with the structural design that the area of ​​the corrugated sealing section is larger than the contact area between the fluid seal 120 and the bottom of the second groove 112, the sealing effect between the muffler 200 and the main device 300 is greatly improved, preventing air leakage from the connection between the muffler 200 and the main device 300, thereby effectively reducing energy loss.

[0082] It should be noted that when the muffler 200 and the main body device 300 are connected, the two sides of the slightly compressed fluid seal 120 in the direction from the inside of the muffler 200 to the outside of the muffler 200 can contact the two sides of the sealing groove 110, or they can not contact each other.

[0083] The direction from the inside of the muffler 200 to the outside of the muffler 200 is parallel to the direction of the diameter extension of the main body equipment 300 (i.e., flange).

[0084] In one example, a first corrugated structure can also be provided at the bottom of the second groove 112. In this case, when the muffler 200 and the main body device 300 are connected, corrugated sealing sections will be formed at both the top and bottom of the sealing groove 110 to further improve the sealing performance between the muffler 200 and the main body device 300. It should be noted that the length of the first corrugated structure in the second groove 112 is less than the length of the corrugated portion 111a in the first groove 111, so that the area of ​​the corrugated sealing section formed by the first corrugated structure is smaller than the area of ​​the corrugated sealing section formed by the corrugated portion 111a.

[0085] In another example, a second corrugated structure can also be formed on the outer side of the sealing groove 110, that is, on the side wall near the outer side of the muffler 200, in the direction from the inner side of the muffler 200 to the outer side of the muffler 200. In other words, the second corrugated structure is provided on the outer side wall of the first groove 111 and the second groove 112.

[0086] At this time, when the muffler 200 and the main body device 300 are connected, corrugated sealing sections are formed on the top and outer wall of the sealing groove 110 to ensure and improve the sealing performance between the muffler 200 and the main body device 300, thereby reducing energy loss.

[0087] It should be noted that, in this example, when the fluid seal 120 is in a slightly compressed state, the area of ​​the corrugated sealing section formed in the first groove 111 is greater than the contact area between the fluid seal 120 and the bottom of the second groove 112.

[0088] In another example, a third corrugated structure can be formed on the outer side of the sealing groove 110, i.e., on the side wall near the outer side of the muffler 200, and also on the top of the second groove 112, in a direction pointing from the inner side of the muffler 200 to the outer side of the muffler 200. When the muffler 200 and the main body device 300 are connected, corrugated sealing sections are formed on the top and outer side wall of the sealing groove 110 to ensure and improve the sealing performance between the muffler 200 and the main body device 300, thereby reducing energy loss.

[0089] It should be noted that, in this example, when the fluid seal 120 is in a slightly compressed state, the length of the third corrugated structure in the second groove 112 is less than the length of the corrugated portion 111a in the first groove 111, so that the area of ​​the corrugated sealing section formed by the third corrugated structure is less than the area of ​​the corrugated sealing section formed by the corrugated portion 11a.

[0090] like Figures 3 to 11 As shown, in some embodiments, the cross-sectional shape of the sealing groove 110 is designed as circular, square, and as in the examples above, the first groove 111 and the second groove 112 (groove channels). Through calculation and analysis, the cross-sectional area of ​​the channels in the three cases is designed to be the same, and fluid seals 120 of the same size are installed in each case. Then, the leakage at the connection point between the muffler 200 and the main body device 300 is compared under the same compressor operating conditions, and leakage tests are conducted in different types of compressors. The leakage amounts of the three channels are shown in Table 1.

[0091]

[0092] As shown in Table 1 above, when the sealing groove 110 is designed as a groove-type channel, the leakage at the connection point between the muffler 200 and the main body device 300 is minimal, which means the sealing performance is the best.

[0093] Based on this, a plurality of spaced groove sections 111b are provided at the bottom of the first groove 111 in the direction from the inside of the muffler 200 to the outside of the muffler 200.

[0094] When the muffler 200 and the main body device 300 are connected, the fluid seal 120 is slightly compressed. At this time, the bottom of the fluid seal 120 is squeezed into the multiple groove sections 111b at the position where it contacts the corrugated portion 111a in the first groove 111, thereby forming a corrugated sealing section.

[0095] The number of grooved sections 111b can be any integer value from 2 to 8. It should be noted that when there is only one grooved section 111b, the sealing effect of the resulting corrugated sealing section is poor. When there are eight or more grooved sections 111b, the manufacturing difficulty of the grooved sections 111b increases, and the bottom width of the first groove 112 becomes larger, thus affecting the original structural strength of the main body device 300 or the muffler 200. Therefore, setting the number of grooved sections 111b to any value between two and eight ensures the original structural strength of the main body device 300 and the muffler 200 while effectively improving the sealing effect between them.

[0096] like Figures 8 to 11As shown, in some embodiments, the number of grooved sections 111b is at least two. When the number of grooved sections 111b is less than two, such as one, the sealing effect of the formed corrugated sealing section is not ideal. Therefore, the number of grooved sections 111b is set to two or more.

[0097] In a preferred example, the number of groove sections 111b is 3 to 5. This number of groove sections 111b facilitates processing and manufacturing within the first groove 111, while also effectively ensuring the original structural strength of the muffler 200 and the main body device 300, thereby effectively improving the sealing effect of the contact area between the muffler 200 and the main body device 300 and reducing energy loss.

[0098] The groove section 111b has a symmetrical structure to facilitate its processing and reduce the manufacturing difficulty of the sealing groove 110. As shown in the example below, the groove section 111b includes crests and troughs, that is, the troughs located on both sides of the crest are symmetrically arranged with respect to the axis of the crest.

[0099] like Figures 8 to 11 As shown, in some embodiments, the number of grooved sections 111b is at least two. When the number of grooved sections 111b is less than two, such as one, the sealing effect of the formed corrugated sealing section is not ideal. Therefore, the number of grooved sections 111b is set to two or more.

[0100] In a preferred example, the number of groove sections 111b is 4 to 6. This number of groove sections 111b facilitates processing and manufacturing within the first groove 111, while also effectively ensuring the original structural strength of the muffler 200 and the main body device 300, thereby effectively improving the sealing effect of the contact area between the muffler 200 and the main body device 300 and reducing energy loss.

[0101] Reference Figures 8 to 11 As shown, along the direction from the inside to the outside of the muffler 200, the groove section 111b includes a first segment b1 and a second segment b2 that are interconnected. In each groove section 111b, the second segment b2 is closer to the outside of the muffler 200. The first segment b1 is positioned obliquely upwards, and the second segment b2 is positioned obliquely downwards; furthermore, the inclination angle of the first segment b1 is smaller than that of the second segment b2. In other words, the groove section 111b in this example has an asymmetrical structure.

[0102] In this example, when the muffler 200 and the main body device 300 are connected, the fluid seal 120 is squeezed into the groove section 111b. At this time, the second section b2 with a larger tilt angle works in conjunction with the first section b1 to form multiple corrugated sealing sections similar to a gentle uphill slope and a steep downhill slope. The sealing effect of the multiple corrugated sealing sections with a gentle uphill slope and a steep downhill slope in this example is slightly better than the sealing effect of the corrugated sealing sections with the above-mentioned symmetrical structure.

[0103] In one example, the acute angle of the tilt angle of the first segment b1 ranges from 20° to 45°, while the acute angle of the tilt angle of the second segment b2 ranges from 30° to 60°. The tilt angle of the first segment b1 is smaller than that of the second segment b2.

[0104] It should be noted that, in this example, the acute angle of the tilt angle of the first segment b1 is the acute angle formed when the extension line of the first segment b1 intersects the horizontal plane, and the acute angle of the tilt angle of the second segment b2 is the acute angle formed when the extension line of the second segment b2 intersects the horizontal plane.

[0105] like Figure 9 As shown, in some embodiments, when the muffler 200 is installed on the main body device 300, the fluid seal 120 is defined as being in a slightly compressed state. At this time, the width of the fluid seal 120 is defined as D1, and the width of each groove section 111b is defined as d. It should be noted that the width d is applicable to the groove sections 111b of the above-mentioned symmetrical and asymmetrical structures.

[0106] To ensure the smooth operation of the fluid seal 120 under slight compression, based on its ultimate deformation capacity, when the fluid seal 120 is compressed into multiple groove sections 111b, the following relationship exists between the width D1 of the fluid seal 120 and the width d of the groove sections 111b under slight compression: the product of the widths d of N groove sections is greater than the width D1 of the fluid seal, i.e., (N×d)>0.6D1, where N is the number of groove sections. It should be noted that, based on the relationship between D1 and d, the sealing effect between the muffler 200 and the main body device 300 can be effectively improved under the ultimate deformation capacity of the fluid seal 120, preventing air leakage between the muffler 200 and the main body device 300, thereby effectively reducing energy loss.

[0107] like Figure 9 As shown, in some embodiments, the groove section 111b includes crests and troughs. A first vertical distance between the crests and troughs is defined as h1, and a second vertical distance between the bottom of the first groove 111 and the trough is defined as H1.

[0108] In order to better accommodate the deformation of the fluid seal 120 to fit the sealing groove 110 between the muffler 200 and the main body device 300, the first vertical distance h1 and the second vertical distance H1 have the following relationship: 0.1H1 < h1 < 0.55H1.

[0109] On the other hand, when the muffler 200 and the main body device 300 are in a connected state, the fluid seal 120 is in a slightly compressed state. By limiting the ratio between the above-mentioned distances, a corrugated sealing section with excellent sealing effect can be formed between the top of the fluid seal 120 and the first groove 111 to meet the sealing requirements between the muffler 200 and the main body device 300.

[0110] In this example, a high-viscosity fluid with high surface tension is formed near the fitting gap 400 of the flowable seal 120. After this high-viscosity fluid comes into contact with the gas in the compressor for a period of time, some of the gas will seep into the high-viscosity fluid, forming a certain small space. The gas continues to seep in until the pressure on the inside and outside of the flowable seal 120 reaches a state of equilibrium, thereby forming a good zero fitting gap seal.

[0111] like Figure 1 As shown, an exemplary embodiment of the present invention provides a pressure device, the main device including a main device 300, a silencer 200, and a sealing structure 100 of any of the above embodiments. The silencer 200 is adapted to be connected to the main device 300, and the sealing structure 100 is disposed at the connection position between the silencer 200 and the main device 300.

[0112] Among them, the main equipment 300 includes, but is not limited to, the compressor body, and the pressure equipment is the compressor.

[0113] like Figures 1 to 11 As shown, in some embodiments, when the muffler 200 and the main body device 300 are connected, the side of the fluid seal 120 facing the inside of the muffler cavity is a predetermined distance from the sidewall of the sealing groove 110.

[0114] The predetermined distance setting allows the gas inside the silencing cavity to increase the contact area between the gas and the fluid seal 120 after entering the sealing groove 110 when the main device 300 is in operation. Under pressure, the gas can push the fluid seal 120 towards the outside of the silencing cavity. When the side of the fluid seal 120 towards the outside of the silencing cavity contacts the side wall of the sealing groove 110, as the pressure increases, the fluid seal 120 near the mating gap 400 becomes fluid and gradually fills the mating gap 400 on that side, thus forming a zero-gap seal. This effectively improves the sealing effect of the fluid seal 120 and reduces the energy loss of the main device.

[0115] like Figures 3 to 7 As shown, in some embodiments, when the muffler 200 and the main body device 300 are in a connected state, the diameter of the fluid seal 120 is defined as D. Since the muffler 200 is a stamped part, its surface is not completely flat after demolding. Similarly, the main body device 300 is a machined part, and its surface is not completely flat due to manufacturing tolerances. Therefore, a clearance 400 exists between the muffler 200 and the main body device 300, defined as L.

[0116] The diameter D of the fluid seal 120 is related to the working pressure M and the fitting clearance L of the muffler 200. The fluid seal 120 can be made of an explosion-proof rubber material. This material has good elastic memory and permeability, which can compensate for the manufacturing and fitting tolerances between the muffler 200 and the main body 300. In other words, when the compressor is not working, the fluid portion of the fluid seal 120 can return to its original state.

[0117] Reference Figures 5 to 7As shown in the figure, Pd represents the inner side of the muffler 200, and Ps represents the outer side of the muffler 200. When the working pressure M of the muffler 200 is within the first range, i.e., 1 MPa ≤ M ≤ 3 MPa, 0.02D ≤ L ≤ 0.1D. By limiting the relative relationship between the diameter of the fluid seal 120 and the working pressure M of the muffler 200 and the fitting clearance L as described above, it can be ensured that when the working pressure M is within the above range, i.e., 1 MPa ≤ M ≤ 3 MPa, an incompressible, high-viscosity fluid with high surface tension is formed near the fitting clearance 400 of the fluid seal 120. After this high-viscosity fluid comes into contact with the gas in the compressor for a period of time, some of the gas will seep into the high-viscosity fluid, forming a certain small space. The gas continues to seep in until the pressure on the inner and outer sides of the fluid seal 120 reaches a state of equilibrium, thereby forming a good zero-fitting-clearance seal within the fitting clearance 400.

[0118] When the working pressure M of the muffler 200 is in the second range, i.e., M > 3 MPa, L ≤ 0.05D, where the range of the fitting clearance L can be L ≤ 0.3 mm. Within this fitting clearance L range, the higher the working pressure M of the muffler 200 (e.g., exceeding 3 MPa), the more gas infiltrates. Therefore, more of the fluid-like seal 120 will enter the fitting clearance 400, resulting in a better sealing effect and reducing energy loss.

[0119] In the above example, the silencer 200 is installed on the flange of the main body of the pressure equipment 300, such as a compressor. When the compressor is running, the internal exhaust pressure causes the air pressure inside the silencer 200 to be greater than the air pressure outside the chamber. At this time, a portion of the fluid-flowing seal 120 near the fitting gap 400 between the silencer 200 and the main body 300 is in a fluid state and flows into the fitting gap, forming a zero fitting gap seal. This greatly improves the sealing effect between the silencer 200 and the main body 300, prevents air leakage between the silencer 200 and the main body 300, and effectively reduces energy loss.

[0120] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0121] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A sealing structure disposed between a muffler and a main body device, the muffler comprising a housing, the housing covering the exhaust portion of the main body device and forming a silencing cavity communicating with the exhaust portion; Its features are, The sealing structure includes: A sealing groove is provided at the connection between the housing and the main body device, and surrounds the outer periphery of the exhaust part of the main body device. The sealing groove includes a first groove provided on the main body device and a second groove provided on the housing. The second groove is disposed opposite to the first groove. Both the bottom of the first groove and the second groove are provided with corrugated portions. The length of the corrugated portion in the second groove is less than the length of the corrugated portion in the first groove. A flowable seal is disposed within the sealing groove. When the exhaust portion of the main body device exhausts a certain amount of gas into the silencing cavity, the flowable seal at least partially flows from one side of the sealing groove to the other side of the sealing groove and fills the mating gap between the housing and the main body device. When the flowable seal is within the sealing groove, the bottom of the flowable seal contacts the corrugated portion in the first groove to form a corrugated sealing section, and the top of the flowable seal contacts the corrugated portion in the second groove to form a corrugated sealing section. The area of ​​the corrugated sealing section formed by the flowable seal and the bottom of the first groove is greater than the area of ​​the corrugated sealing section formed by the flowable seal and the bottom of the second groove.

2. The sealing structure according to claim 1, characterized in that, The fluid seal is made of a fluid sealant with a compression ratio of 10% to 22% and a viscosity of 0.1 to 0.3 Pa·s.

3. The sealing structure according to claim 1, characterized in that, The fluid seal is configured as an O-ring.

4. The sealing structure according to any one of claims 1 to 3, characterized in that, The sealing groove is provided in multiple ways, and the multiple sealing grooves are arranged sequentially from the inside of the silencing cavity to the outside of the silencing cavity; Each of the sealing grooves is provided with a corresponding fluid seal.

5. The sealing structure according to claim 1, characterized in that, The inner side of the silencing cavity faces the outer side of the silencing cavity, and the bottom of the first groove is provided with multiple spaced groove sections; When the fluid seal is in the sealing groove, the position where the fluid seal contacts the corrugated portion in the first groove is squeezed into multiple groove sections to form the corrugated sealing section.

6. The sealing structure according to claim 5, characterized in that, The number of grooved sections is at least two, and the grooved sections have a symmetrical structure.

7. The sealing structure according to claim 5, characterized in that, The number of grooved sections is at least two; The inner side of the silencing cavity faces the outer side of the silencing cavity. The groove section includes a first section and a second section that are connected to each other. The first section is arranged in an upward oblique direction, and the second section is arranged in a downward oblique direction. The inclination angle of the first section is smaller than that of the second section.

8. The sealing structure according to claim 5, characterized in that, When the fluid seal is located within the sealing groove, the width of the fluid seal is defined as D1, and the width of each groove section is defined as d. The following relationship exists between the width D1 of the fluid seal and the width d of the groove section: the product of N and the width d of the groove section is greater than 0.6D1, where N is the number of groove sections.

9. The sealing structure according to claim 5, characterized in that, The groove section includes crests and troughs, and a first vertical distance between the crests and the troughs is defined as h1; and a second vertical distance between the bottom of the second groove and the troughs is defined as H1; The first vertical distance h1 and the second vertical distance H1 have the following relationship: 0.1H1 < h1 < 0.55H1.

10. A pressure device, characterized in that, include: The main body equipment, the muffler, and the sealing structure for the sealed connection between the main body equipment and the muffler; The sealing structure includes the sealing structure as described in any one of claims 1 to 9.

11. The pressure device according to claim 10, characterized in that, The sidewall of the fluid seal facing the inside of the silencing cavity is spaced apart by a predetermined distance from the sidewall of the corresponding sealing groove.

12. The pressure device according to claim 10, characterized in that, The diameter of the fluid seal is defined as D, and the fitting clearance is defined as L; The diameter D of the fluid seal is related to the working pressure M of the muffler and the fitting clearance L, wherein when 1 MPa ≤ M ≤ 3 MPa, 0.02D ≤ L ≤ 0.1D; And, when M > 3 MPa, L ≤ 0.05D.

13. The pressure device according to any one of claims 10 to 12, characterized in that, The pressure device is a compressor, the main body device is the compressor body, and the silencer is connected to the flange of the compressor.

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