Sealing structure and pressure equipment

Abstract

The invention relates to the technical field of compressor equipment, in particular to a sealing structure and pressure equipment. The sealing structure is arranged at the joint of a silencer and body equipment of the pressure equipment and comprises a sealing groove and a flowable sealing piece. The sealing groove is formed in the joint of the shell and the body equipment and is annularly formed in the periphery of an exhaust part of the body equipment; and the flowable sealing element is arranged in the sealing groove, and when the exhaust of the exhaust part of the body equipment into the silencing cavity reaches a certain value, at least part of the flowable sealing element flows from one side of the sealing groove to the other side of the sealing groove and fills the fit clearance between the shell and the body equipment. When the silencer is used, zero fit clearance sealing is conducted on the fit clearance between the silencer and the body equipment through the flowable sealing piece, and therefore the sealing effect is effectively improved, and energy loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to a sealing structure and pressure equipment. Background Art

[0002] Compressors are widely used in air conditioners and other equipment, and are gradually developing towards high energy efficiency and low noise.

[0003] In air conditioning equipment, after the refrigerant gas passes through the compressor, it is discharged into the lower chamber of the motor in the air conditioner through the exhaust port. The high-pressure gas compressed by the compressor will generate strong exhaust noise when passing through the exhaust port. This part of the exhaust noise is also the main source of pneumatic noise. At this time, a muffler can be used to slow down the pulsation of high-pressure airflow and reduce exhaust noise.

[0004] The flanges and mufflers at the connection positions of existing compressors mostly use flat seals. Since the muffler is generally a stamped part, the flatness of the connection position between the muffler and the flange after demolding is poor. Therefore, the sealing performance at the connection position between the muffler and the flange is poor, which may cause exhaust leakage and energy loss. Summary of the invention

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

[0006] A first aspect of an embodiment of the present invention provides a sealing structure, which is arranged between a muffler and a main body of a pressure device, wherein the muffler comprises a shell, the shell cover is arranged at an exhaust portion of the main body and forms a muffler cavity connected to the exhaust portion;

[0007] The sealing structure comprises:

[0008] A sealing groove, which is provided at the connection between the shell and the main device and surrounds the outer periphery of the exhaust part of the main device;

[0009] A flowable seal is arranged in the sealing groove. When the exhaust part of the main device exhausts air into the silencer chamber to a certain value, 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 fitting gap between the shell and the main device.

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

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

[0012] In some embodiments, the sealing groove is provided in plurality, and the plurality of sealing grooves are sequentially arranged from the inner side of the silencing cavity to the outer side of the silencing cavity;

[0013] Wherein, one flowable sealing member is correspondingly arranged in each of the sealing grooves.

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

[0015] When the flowable seal is in the sealing groove, the bottom of the flowable seal contacts the corrugated portion to form a corrugated sealing section, and the area of ​​the corrugated sealing section is larger than the contact area between the flowable seal and the bottom of the second groove.

[0016] In some embodiments, a plurality of groove sections are disposed at intervals at the bottom of the first groove from the inner side of the muffler cavity to the outer side of the muffler cavity;

[0017] Wherein, when the flowable seal is in the sealing groove, the position where the flowable seal contacts the corrugated portion in the first groove is squeezed into a plurality of groove sections to form the corrugated sealing section.

[0018] In some embodiments, the number of the groove nodes is at least two, and the groove nodes are symmetrical structures.

[0019] In some embodiments, the number of the groove nodes is at least two;

[0020] From the inner side of the silencer cavity to the outer side of the silencer cavity, the groove section includes a first section and a second section that are interconnected, the first section is arranged in an oblique upward direction, and the second section is arranged in an oblique downward direction, wherein the inclination angle of the first section is smaller than the inclination angle of the second section.

[0021] In some embodiments, when the flowable seal is in the sealing groove, the width of the flowable seal is defined as D1, and the width of each groove node is defined as d;

[0022] Then, there is the following relationship between the width D1 of the flowable seal and the width d of the groove node: the product of the widths d of N groove nodes is greater than the width D1 of the flowable seal.

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

[0024] Then, the following relationship exists between the first vertical distance h1 and the second vertical distance H1: 0.1H1

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

[0026] Wherein, the sealing structure includes the sealing structure as described in the first aspect.

[0027] In some embodiments, when the muffler is in a connected state with the main device, the side edge of the flowable seal facing the inner side of the muffler chamber is a predetermined distance away from the side wall of the sealing groove.

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

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

[0030] as well as,

[0031] When M>3Mpa, L≤0.05D.

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

[0033] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0034] ​In the sealing structure and pressure equipment of the present invention, the sealing structure is arranged at the connection between the muffler and the main body of the pressure equipment, and the sealing structure includes: a sealing groove and a flowable seal; the sealing groove is arranged at the connection between the shell and the main body, and is arranged around the outer periphery of the exhaust part of the main body; the flowable seal is arranged in the sealing groove, and when the exhaust part of the main body exhausts air into the silencer cavity to a certain value, the flowable seal at least partially flows from one side of the sealing groove toward the other side of the sealing groove and fills the fitting gap between the shell and the main body. When the muffler of the present invention is in use, the flowable seal is used to perform zero fitting gap sealing on the fitting gap between the muffler and the main body, thereby effectively improving the sealing effect and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0036] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

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

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

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

[0040] Figure 4 It is a structural schematic diagram of a sealing structure according to an embodiment of the present invention when a flowable sealing member is in a sealing groove and the compressor is in a working state;

[0041] Figures 5 to 7 It is a schematic structural diagram of a zero-fitting gap seal formed by a flowable sealing member in a sealing structure according to an embodiment of the present invention;

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

[0043] Fig. 9 It is a schematic diagram of the installation position structure of a flowable sealing member in a sealing structure according to an embodiment of the present invention;

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

[0045] Fig.11 Schematic diagram of another structure of a sealing groove in a sealing structure according to an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 100, sealing structure; 110, sealing groove; 111, first groove; 112, second groove; 111a, corrugated portion; 111b, groove section; 120, flowable sealing member; b1, first section; b2, second section;

[0048] 200. Muffler;

[0049] 300, main equipment;

[0050] 400, fit clearance;

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

[0052] The following is a description of the implementation of the present invention by specific embodiments. People familiar with 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "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 only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0055] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0056] 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 are intended to be used 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, which is arranged between a muffler 200 and a main body device 300 of a pressure device. The muffler 200 includes a shell, and the shell cover is arranged at the exhaust position of the main body device 300 and forms a muffler chamber connected to the exhaust part.

[0058] The sealing structure 100 is disposed in the contact area between the muffler 200 and the main device 300. Figure 1 The main device 300 may be a compressor.

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

[0060] The sealing groove 110 may be disposed on the shell of the muffler 200 , or on the main device 300 , or alternatively, the sealing groove 110 may be disposed on the shell of the muffler 200 and the main device 300 .

[0061] The flowable seal 120 is arranged in the sealing groove 110. When the exhaust part of the main device 300 exhausts air into the silencer chamber to a certain value, the flowable seal 120 at least partially flows from one side of the sealing groove 110 toward the other side of the sealing groove 110 and fills the fitting gap 400 between the shell and the main device 300.

[0062] The flowable seal 120 may be an O-ring made of high temperature resistant vulcanized rubber or plasticized rubber. The flowable seal 120 made of such material is in an elastic state at room temperature, but has fluidity at a specific temperature or pressure. When the temperature or pressure rises to a certain critical point, the O-ring of such material will change from an elastic state to a viscous state, and become a high viscosity fluid that can flow.

[0063] For example, under high pressure, or above 50°C, the partially flowable seal 120 becomes a viscous flow state and flows from the high pressure side to the low pressure side so as to be squeezed into the fitting gap 400 between the muffler 200 and the main device 300, thereby achieving a better sealing effect.

[0064] It should be noted that the molecular structure and molecular weight of the vulcanized rubber will affect its fluidity at a specific temperature or pressure. Among them, the vulcanized rubber or plasticized rubber with a flexible molecular chain and a low glass transition temperature has good fluidity; correspondingly, the vulcanized rubber or plasticized rubber with a large molecular weight and a long molecular chain has poor fluidity.

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

[0066] The plasticized rubber is natural vulcanized rubber, or low molecular weight depolymerized vulcanized rubber made by high temperature catalytic mixing, wherein non-reducing mineral oil can be added to the plasticized rubber to achieve zero gap sealing of the fitting gap 400 between the muffler 200 and the main device 300.

[0067] When the muffler 200 and the main device 300 are in a connected state, the flowable seal 120 can be in a slightly compressed state. When the muffler 200 is in a working state, since the inside of the muffler 200 is in a high-pressure environment and the outside of the muffler 200 is in a normal-pressure environment, the part of the flowable seal 120 near the fitting gap 400 forms a fluid state of "high-viscosity fluid" that is incompressible and has a very high surface tension, and the part of the flowable seal 120 in a fluid state flows along the direction from the inside of the muffler 200 to the outside of the muffler 200 to the inside of the muffler 200, and flows into the fitting gap 400 between the muffler 200 and the main device 300 to form a zero fitting gap seal, thereby effectively improving the sealing effect and reducing energy loss.

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

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

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

[0071] It should be noted that setting the compression rate of the flowable seal 120 within this range can not only ensure that the flowable seal 120 has a certain amount of compression deformation, but also ensure that the flowable seal 120 has a good sealing effect when it is in a slightly compressed state.

[0072] In a specific example, the preferred range of the compression rate of the flowable seal 120 is 15% to 20%. When the muffler 200 and the main device 300 are in a connected state, the flowable seal 120 is in a slightly compressed state. Among them, the flowable seal 120 can adopt an explosion-proof rubber sealing ring made of high-temperature resistant material. In the direction from the inside of the muffler 200 to the outside, the pressure on the inside of the flowable seal 120 is greater than the pressure on the outside. At this time, in addition to the extrusion force in the height direction of the flowable seal 120, it is also subjected to the exhaust pressure of the compressor in the width direction of the flowable seal 120. The 15% to 20% compression rate of the flowable seal 120 will form a compressible "high-viscosity fluid" fluid state with very high surface tension on the outside of the flowable seal 120. The part of the flowable seal 120 in a fluid state will flow into the fitting gap 400 between the muffler 200 and the main device 300, thereby forming a zero fitting gap seal, and at the same time will not cause damage to the internal structure of the flowable seal 120.

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

[0074] A flowable sealing member 120 is correspondingly disposed in each sealing groove 110 .

[0075] In this example, multiple sealing grooves 110 can be coaxially arranged, and multiple flowable seals 120 can effectively ensure the sealing effect of the fitting gap 400. At the same time, when part of the flowable seals 120 is damaged, the remaining flowable seals 120 can still play 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 arranged in the first groove 111.

[0077] The first groove 111 may be an annular groove, and the cross-sectional shape of the annular groove is a square or a rectangle. The corrugated portion 111a is arranged 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] Both sides of the second groove 112 are vertical surfaces.

[0079] The flowable seal 120 can be accommodated in the sealing groove 110, that is, when the muffler 200 and the main device 300 are arranged relative to each other and the two are in a connected state, the flowable seal 120 is placed in the sealing groove 110 to perform a sealing function.

[0080] When the muffler 200 and the main device 300 are in a connected state, the flowable 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 extrusion on the bottom and top surfaces of the flowable seal 120, so that the flowable seal 120 is relatively deformed, and then a corrugated sealing section is formed between the bottom surface of the flowable seal 120 and the corrugated portion 111a, wherein the area of ​​the corrugated sealing section is larger than the contact area between the flowable 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, under the action of the internal exhaust pressure, the air pressure in the muffler 200 cavity is greater than the air pressure outside the cavity. At this time, the corrugated sealing section formed at the bottom of the flowable seal 120 when it is compressed can also be utilized. The structural design in which the area of ​​the corrugated sealing section is larger than the contact area between the flowable seal 120 and the bottom of the second groove 112 greatly improves the sealing effect between the muffler 200 and the main device 300, prevents air leakage from the connection between the muffler 200 and the main device 300, and effectively reduces energy loss.

[0082] It should be noted that when the muffler 200 and the main device 300 are in a connected state, along the direction from the inside of the muffler 200 to the outside of the muffler 200, the two side edges of the flowable seal 120 in a slightly compressed state may contact the two side edges of the sealing groove 110, or may not contact.

[0083] The direction from the inner side of the muffler 200 to the outer side of the muffler 200 is parallel to the extension direction of the diameter of the main device 300 (ie, the flange).

[0084] In one example, a first corrugated structure may also be provided at the bottom of the second groove 112. In this case, when the muffler 200 and the main device 300 are in a connected state, corrugated sealing sections are formed at the top and bottom of the sealing groove 110 to further improve the sealing performance between the muffler 200 and the main device 300. It should be noted that the length of the first corrugated structure in the second groove 112 is smaller 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 may be formed on the outside of the sealing groove 110 , i.e., on the side wall close to the outside of the muffler 200 , in a direction pointing from the inside of the muffler 200 to the outside of the muffler 200 . That is, the second corrugated structure is arranged on the outer side walls of the first groove 111 and the second groove 112 .

[0086] At this time, when the muffler 200 and the main device 300 are in a connected state, a corrugated sealing section will be 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 device 300, thereby reducing energy loss.

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

[0088] In another example, a third corrugated structure may be formed on the outside of the sealing groove 110, i.e., on the side wall close to the outside of the muffler 200, and on the top of the second groove 112, along the direction from the inside of the muffler 200 to the outside of the muffler 200. When the muffler 200 and the main device 300 are in a connected state, a corrugated sealing section is formed on the top and the outer side wall of the sealing groove 110 to ensure and improve the sealing performance between the muffler 200 and the main device 300, thereby reducing energy loss.

[0089] It should be noted that, in this example, when the flowable seal 120 is in a slightly compressed state, the length of the third corrugated structure in the second groove 112 is smaller 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 smaller 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 to be circular, square, and the shape of the first groove 111 and the second groove 112 as in the above example (groove channel). The cross-sectional areas of the channels in the three cases are designed to be the same through calculation and analysis, and the flowable seals 120 of the same size are installed respectively. Then, the leakage at the connection position of the muffler 200 and the main device 300 is compared under the same operating state of the compressor, and the leakage is tested in different types of compressors. The leakage of the three channels is shown in Table 1:

[0091]

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

[0093] Based on this, a plurality of groove sections 111 b arranged at intervals are provided at the bottom of the first groove 111 along a direction pointing from the inner side of the muffler 200 to the outer side of the muffler 200 .

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

[0095] Among them, the number of groove sections 111b can be any integer value between 2 and 8. It should be noted that when the number of groove sections 111b is one, the sealing effect of the formed corrugated sealing section is poor. When the number of groove sections 111b is more than 8, the manufacturing difficulty of the groove sections 111b will increase, and the width of the bottom of the first groove 112 will also be larger, thereby affecting the original structural strength of the main device 300 or the muffler 200. Therefore, the number of groove sections 111b is set to any value between two and eight, so as to ensure the original structural strength of the main device 300 and the muffler 200, while effectively improving the sealing effect between the two.

[0096] like Figures 8 to 11As shown, in some embodiments, the number of groove sections 111b is at least two. When the number of groove sections 111b is less than two, such as one, the sealing effect of the formed corrugated sealing section is not ideal, so the number of groove 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 is convenient for processing and manufacturing in the first groove 111, and can effectively ensure the original structural strength of the muffler 200 and the main device 300, thereby effectively improving the sealing effect of the contact area between the muffler 200 and the main device 300 and reducing energy loss.

[0098] The groove section 111b is a symmetrical structure, which facilitates the processing of the groove section 111b and reduces the difficulty of manufacturing the sealing groove 110. As shown in the following example, the groove section 111b includes a crest and a trough, that is, the troughs on both sides of the crest are symmetrically arranged relative to the axis of the crest.

[0099] like Figures 8 to 11 As shown, in some embodiments, the number of groove segments 111b is at least two. When the number of groove segments 111b is less than two, such as one, the sealing effect of the formed corrugated sealing section is not ideal, so the number of groove segments 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 is convenient for processing and manufacturing in the first groove 111, and can effectively ensure the original structural strength of the muffler 200 and the main device 300, thereby effectively improving the sealing effect of the contact area between the muffler 200 and the main device 300 and reducing energy loss.

[0101] Reference Figures 8 to 11 As shown, along the direction from the inside of the muffler 200 to the outside of the muffler 200, the groove section 111b includes a first section b1 and a second section b2 that are connected to each other. Among them, in each groove section 111b, the second section b2 is close to the outside of the muffler 200. The first section b1 is arranged in an oblique upward direction, and the second section b2 is arranged in an oblique downward direction, and the inclination angle of the first section b1 is smaller than the inclination angle of the second section b2. That is to say, the groove section 111b in this example is an asymmetric structure.

[0102] In this example, when the muffler 200 and the main device 300 are in a connected state, the flowable seal 120 is squeezed into the groove section 111b. At this time, the second section b2 with a larger inclination angle is combined with the first section b1 to form multiple corrugated sealing sections similar to a gentle upslope and a steep downslope. The sealing effect of the multiple corrugated sealing sections with a gentle upslope and a steep downslope 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 inclination angle of the first segment b1 ranges from 20° to 45°, while the acute angle of the inclination angle of the second segment b2 ranges from 30° to 60°, wherein the inclination angle of the first segment b1 is smaller than the inclination angle of the second segment b2.

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

[0105] like Fig. 9 As shown, in some embodiments, after the muffler 200 is installed on the main device 300, the flowable seal 120 is defined to be in a slightly compressed state. At this time, the width of the flowable seal 120 is D1, and the width of each groove section 111b is defined to be 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] In order to ensure that the flowable seal 120 is in a slightly compressed state, based on the ultimate deformation capacity of the flowable seal 120, when the flowable seal 120 is squeezed into multiple groove sections 111b, the following relationship exists between the width D1 of the flowable seal 120 and the width d of the groove section 111b in the slightly compressed state: the product of the widths d of the N groove sections is greater than the width D1 of the flowable seal, that is, (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 device 300 can be effectively improved under the ultimate deformation capacity of the flowable seal 120, and air leakage from the muffler 200 and the main device 300 can be prevented, thereby effectively reducing energy loss.

[0107] like Fig. 9 As shown, in some embodiments, the groove segment 111b includes a crest and a trough, wherein a first vertical distance between the crest and the trough 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 enable the deformation of the flowable seal 120 to adapt to the sealing groove 110 between the muffler 200 and the main device 300, the following relationship exists between the first vertical distance h1 and the second vertical distance H1: 0.1H1

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

[0110] In this example, a high-viscosity fluid with very high surface tension is formed at the position of the flowable seal 120 near the fitting gap 400. After this part of the high-viscosity fluid is in contact with the gas in the compressor for a period of time, part of the gas will penetrate into the high-viscosity fluid to form a certain tiny space. The gas continues to penetrate until the pressure on the inside and outside of the flowable seal 120 reaches a balanced state, 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, which includes a main device 300, a muffler 200 and a sealing structure 100 of any of the above embodiments. The muffler 200 is adapted to be connected with the main device 300, and the sealing structure 100 is arranged at the connection position between the muffler 200 and the main device 300.

[0112] The main device 300 at least includes but is not limited to a compressor body, and the pressure device is a compressor.

[0113] like Figures 1 to 11 As shown, in some embodiments, when the muffler 200 and the main device 300 are in a connected state, the side edge of the flowable seal 120 facing the inner side of the muffler chamber is a predetermined distance away from the side wall of the sealing groove 110 .

[0114] ​Among them, the setting of the predetermined distance can increase the contact area between the gas on the inside of the silencer chamber and the flowable seal 120 after entering the sealing groove 110 when the main device 300 is in a working state. Under the action of pressure, the gas can push the flowable seal 120 to move toward the outside of the silencer chamber. When the flowable seal 120 contacts the side wall of the outside of the sealing groove 110 toward the side outside the silencer chamber, as the pressure continues to increase, the flowable seal 120 near the fitting gap 400 forms a fluid state and gradually fills the fitting gap 400 on this side, thereby forming a zero-gap seal, which effectively improves the sealing effect of the flowable 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 device 300 are in a connected state, the diameter of the flowable seal 120 is defined as D. Among them, because the muffler 200 is a stamping part, its surface is not completely flat after the muffler 200 is demolded. The main device 300 is a processed part. During the processing and manufacturing process, the surface of the main device 300 is not completely flat due to manufacturing tolerances. Therefore, there will be a fitting gap between the muffler 200 and the main device 300, and the fitting gap 400 is defined as L.

[0116] The diameter D of the flowable seal 120 is related to the working pressure M and the fitting clearance L of the muffler 200. The flowable seal 120 can be made of an anti-implosion grade rubber material. The flowable seal 120 of this material has good elastic memory function and permeability, and can compensate for the manufacturing and fitting tolerances between the muffler 200 or the main device 300. In other words, when the compressor is not working, the part of the flowable seal 120 in a fluid state can return to its original state.

[0117] Reference Figures 5 to 7As shown, in the figure, Pd is the inner side of the muffler 200, and Ps is the outer side of the muffler 200. When the working pressure M of the muffler 200 is in the first range, that is, 1Mpa≤M≤3Mpa, 0.02D≤L≤0.1D. The above-mentioned definition of the relative relationship between the diameter of the flowable seal 120 and the working pressure M of the muffler 200 and the fitting clearance L can ensure that when the working pressure M is in the above-mentioned range, that is, between 1Mpa≤M≤3Mpa, the flowable seal 120 forms an incompressible high-viscosity fluid with a very high surface tension at the position close to the fitting clearance 400. After this part of the high-viscosity fluid contacts the gas in the compressor for a period of time, part of the gas will penetrate into the high-viscosity fluid to form a certain small space. The gas continues to penetrate until the pressure on the inside and outside of the flowable seal 120 reaches a balanced state, thereby forming a good zero fitting clearance seal in the fitting clearance 400.

[0118] When the working pressure M of the muffler 200 is in the second range, that is, M>3Mpa, L≤0.05D, wherein the value range of the fitting clearance L can be: L≤0.3mm. Within the range of the fitting clearance L, the higher the working pressure M of the muffler 200 (for example, exceeding 3Mpa), the more gas will penetrate, so more of the flowable seal 120 in a fluid state will enter the fitting clearance 400, thereby forming a better sealing effect and reducing energy loss.

[0119] In the above example, the muffler 200 is installed on the main device 300 of the pressure equipment, such as the flange of the compressor. When the compressor is running, under the action of the internal exhaust pressure, the air pressure in the muffler 200 cavity is greater than the air pressure outside the cavity. At this time, part of the flowable seal 120 near the fitting gap 400 between the muffler 200 and the main device 300 is in a fluid state and flows into the above fitting gap to form a zero fitting gap seal, which greatly improves the sealing effect between the muffler 200 and the main device 300, prevents air leakage between the muffler 200 and the main device 300, and effectively reduces energy loss.

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

[0121] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A sealing structure, arranged between a muffler and a main device, wherein the muffler comprises a shell, and the shell cover is arranged at an exhaust portion of the main device and forms a muffler cavity communicated with the exhaust portion; It is characterized in that The sealing structure comprises: A sealing groove, which is provided at the connection between the shell and the main device and surrounds the outer periphery of the exhaust part of the main device; A flowable seal is arranged in the sealing groove. When the exhaust part of the main device exhausts air into the silencer chamber to a certain value, 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 fitting gap between the shell and the main device.

2. The sealing structure according to claim 1, characterized in that: The flowable sealing element is made of a flowable sealing material with a compression rate 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 flowable sealing element is configured as an O-ring.

4. The sealing structure according to any one of claims 1 to 3, characterized in that: The sealing grooves are provided in plurality, and the plurality of sealing grooves are sequentially arranged from the inner side of the muffler cavity to the outer side of the muffler cavity; Wherein, one flowable sealing member is correspondingly arranged in each of the sealing grooves.

5. The sealing structure according to claim 1, characterized in that: The sealing groove comprises a first groove arranged on the main device and a second groove arranged on the shell, the second groove is arranged opposite to the first groove, and a corrugated portion is arranged at the bottom of the first groove; When the flowable seal is in the sealing groove, the bottom of the flowable seal contacts the corrugated portion to form a corrugated sealing section, and the area of ​​the corrugated sealing section is larger than the contact area between the flowable seal and the bottom of the second groove.

6. The sealing structure according to claim 5, characterized in that: A plurality of groove sections arranged at intervals are arranged at the bottom of the first groove from the inner side of the muffler cavity to the outer side of the muffler cavity; Wherein, when the flowable seal is in the sealing groove, the position where the flowable seal contacts the corrugated portion in the first groove is squeezed into a plurality of groove sections to form the corrugated sealing section.

7. The sealing structure according to claim 6, characterized in that: The number of the groove sections is at least two, and the groove sections are symmetrical structures.

8. The sealing structure according to claim 6, characterized in that: The number of the groove nodes is at least two; From the inner side of the silencer cavity to the outer side of the silencer cavity, the groove section includes a first section and a second section that are interconnected, the first section is arranged in an oblique upward direction, and the second section is arranged in an oblique downward direction, wherein the inclination angle of the first section is smaller than the inclination angle of the second section.

9. The sealing structure according to claim 6, characterized in that: When the flowable seal is in the sealing groove, the width of the flowable seal is defined as D1, and the width of each groove section is defined as d; Then there is the following relationship between the width D1 of the flowable seal and the width d of the groove node: the product of the widths d of N groove nodes is greater than the width D1 of the flowable seal.

10. The sealing structure according to claim 6, characterized in that: The groove node includes a crest and a trough, and a first vertical distance between the crest and the trough is defined as h1; and a second vertical distance between the bottom of the first groove and the trough is defined as H1; Then, the following relationship exists between the first vertical distance h1 and the second vertical distance H1: 0.1H1<h1<0.55H1.

11. A pressure device, characterized in that: include: A main body device, a muffler and a sealing structure for sealingly connecting the main body device and the muffler; Wherein, the sealing structure comprises the sealing structure as described in any one of claims 1 to 10.

12. The pressure device according to claim 11, characterized in that There is a preset distance between the side wall surface of the flowable sealing member facing the inner side of the muffler cavity and the side wall surface of the sealing groove corresponding thereto.

13. The pressure device according to claim 11, characterized in that Define the diameter of the flowable seal as D, and the fitting clearance as L; The value of the diameter D of the flowable seal is related to the working pressure M of the muffler and the fitting clearance L, wherein, when 1Mpa≤M≤3Mpa, 0.02D≤L≤0.1D; And, when M>3Mpa, L≤0.05D.

14. The pressure device according to any one of claims 11 to 13, characterized in that The pressure equipment is a compressor, the main equipment is a compressor body, and the muffler is connected to a flange of the compressor.

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