An automatic compensating seal for holes and method of use

Abstract

The present application relates to a kind of automatic compensation hole sealing devices, comprising: split sealing module and compression overlapping sealing module;By the damping hole on split sealing module and compression overlapping sealing module, control oil is introduced into sealing device to realize hydraulic oil film support and lubrication function, so as to realize reliable low friction sealing in rotary or reciprocating state;Split sealing module and compression overlapping sealing module, modular design is used, split installation, assembly and disassembly are convenient.Compared with prior art, the present application has the advantages of easy processing, compact structure, simple, easy to install, easy to adjust, easy to maintain, batch production, etc.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and in particular to a sealing device for an automatic compensation orifice and its method of use. Background Technology

[0002] Conventional orifice seals in the field of fluid control technology can be applied to dynamic and static seals. They are mainly used to prevent internal or external leakage between relatively moving or fixed coupled parts, and to prevent external dust, gas, liquid or other foreign objects from entering between the relatively coupled parts, thereby causing abnormal wear, leakage, pollution and other hidden dangers between the coupled parts and between the coupled parts and the external environment.

[0003] In the field of fluid control, commonly used external seals include O-ring seals, Y-type seals, V-type seals, combination gasket seals, sealing tapes, and dust rings. Coupling seals between parts also include gap seals, line seals, and seals that combine the above sealing forms. Conventional slide valves or cone valves use both external seals and coupling seals between parts.

[0004] External seals are typically annular closed structures to ensure their sealing effect. For an external seal to achieve a reliable seal, it requires a certain amount of pre-compression (or deformation) after assembly. Depending on the different pre-compression requirements for static and dynamic seals, this is usually around 15% to 25% of the effective diameter. For static seals, the final sealing effect also depends on the surface roughness and flatness of the sealing mating surfaces of the parts, the ambient temperature, and the compatibility of the working medium and the sealing material. For dynamic seals, in addition to the above factors, their sealing effect is also affected by the coaxiality, cylindricity, linearity, and wear between the moving parts.

[0005] In reciprocating motion actuators, external seals are often added for ease of installation. The external wear-resistant rings are often made of non-closed cut-out sealing strips, or the seals are first expanded for installation and then shaped after assembly. This can easily cause the assembled seals to twist and deform or become unshapeable, resulting in leaks due to cut edges after assembly.

[0006] For operating conditions characterized by high speed, low frictional resistance, fast dynamic response, and high system operating pressure, existing external seals are insufficient to meet the requirements. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects of the prior art by providing an automatic compensation hole sealing device and its usage method, which has the advantages of convenient processing, compact structure, simplicity, easy installation, convenient adjustment, simple maintenance, and mass production capability.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A sealing device for an automatic compensation hole is disclosed, wherein the sealing device is located between the automatic compensation hole and a sealing mating shaft, the automatic compensation hole having an annular mounting groove, and the sealing device is used to prevent fluid leakage between the two sides of the automatic compensation hole.

[0010] The sealing device is an assembled ring structure, comprising a segmented sealing module and a pressing and overlapping sealing module. The segmented sealing module and the pressing and overlapping sealing module are mutually supported and fixed, and the segmented sealing module and the pressing and overlapping sealing module are arranged sequentially at intervals along the annular mounting groove of the automatic compensation hole.

[0011] In one embodiment of the present invention, the surface of the segmented sealing module and the pressing overlapping sealing module that connects with the automatic compensation hole is the bottom surface, and the surface of the segmented sealing module and the pressing overlapping sealing module that connects with the sealing mating shaft is the top surface. The bottom surface is a rectangular or annular columnar structure, and the longitudinal depth of the segmented sealing module and the pressing overlapping sealing module is greater than the longitudinal length of the automatic compensation hole and the sealing mating shaft.

[0012] In one embodiment of the present invention, a control oil channel is provided between the automatic compensation holes, and the number of the sealing mating shafts is greater than or equal to one.

[0013] In one embodiment of the present invention, the segmented sealing module includes a segmented sealing module oil mold support groove, a segmented sealing module end overlap block, a segmented sealing module end overlap groove, a segmented sealing module mounting cylindrical base, and a segmented sealing module damping hole.

[0014] The segmented sealing module is mounted on a cylindrical base with a slight indentation in the middle and protrusions on both sides, forming a concave structure. The concave part in the middle of the bottom surface of the cylindrical base connects to the annular mounting groove. One end of the segmented sealing module's end overlap block connects to the cylindrical base, and the other end connects to the oil mold support groove. The oil mold support groove has end overlap grooves on both sides, and the end overlap blocks have notches at both ends. The segmented sealing module mounting cylindrical base has a centrally located damping hole in the middle of its recessed area. This damping hole penetrates the segmented sealing module mounting cylindrical base, the segmented sealing module end overlap block, and the segmented sealing module oil mold support groove. The damping hole is connected to the control oil channel. By setting a reasonable pilot pressure, the frictional resistance of the shaft hole sealing mating surface is reduced, forming a hydraulic oil film support. The two raised edges of a certain thickness form two sealing ring surfaces to isolate the oil passages on both sides of the sealing strip.

[0015] In one embodiment of the present invention, both ends of the cylindrical base of the segmented sealing module are provided with segmented sealing module sealing O-rings, which are used to control the leakage of pressure oil through the gap of the mounting bottom surface.

[0016] In one embodiment of the present invention, the pressing and overlapping sealing module includes a pressing and overlapping sealing module oil mold support groove, a pressing and overlapping sealing module end overlap groove, a pressing and overlapping sealing module pressing and sealing block, a pressing and overlapping sealing module mounting cylindrical base, and a pressing and overlapping sealing module damping hole.

[0017] The cylindrical base for mounting the overlapping sealing module has a smooth arc surface in the middle and protruding sides, forming a concave structure. The smooth arc surface in the middle of the cylindrical base connects to an annular mounting groove. One end of the overlapping sealing module's sealing block connects to the cylindrical base, and the other end connects to the oil mold support groove. The sealing block has end overlap grooves on both sides. A damping hole for pressing and overlapping sealing modules is centrally located in the recessed middle of the cylindrical base for mounting the sealing module. The damping hole penetrates the cylindrical base for mounting the pressing and overlapping sealing modules, the pressing and overlapping sealing module pressing and sealing block, and the pressing and overlapping sealing module oil mold support groove. The damping hole is connected to the control oil channel. By setting a reasonable pilot pressure, the frictional resistance of the shaft hole sealing mating surface is reduced, forming a hydraulic oil film support. The raised edges on both sides of a certain thickness form two sealing ring surfaces to isolate the oil passages on both sides of the sealing band.

[0018] In one embodiment of the present invention, both ends of the cylindrical base for mounting the overlapping sealing module are provided with O-rings for the overlapping sealing module. The O-rings for the overlapping sealing module are used to control the leakage of pressure oil through the gap between the mounting bottom surface.

[0019] In one embodiment of the present invention, the oil mold support groove of the segmented sealing module is connected to the oil mold support groove of the pressing and overlapping sealing module, and the two ends of the oil mold support groove of the pressing and overlapping sealing module are located at the end overlap groove of the segmented sealing module, and their dimensions are compatible.

[0020] The pressing and overlapping sealing module's pressing and sealing block is connected to the end overlapping block of the segmented sealing module. The two ends of the segmented sealing module's end overlapping block are located at the end overlapping groove of the pressing and overlapping sealing module, and their sizes are compatible.

[0021] In one embodiment of the present invention, the oil mold support groove of the segmented sealing module and the oil mold support groove of the pressing overlapping sealing module are made of copper, carbon steel or graphite. The material is selected according to the working pressure of the system in order to reduce the friction between the segmented sealing module and the pressing overlapping sealing module and the automatic compensation hole and form a reliable dynamic seal.

[0022] In one embodiment of the present invention, the number of the segmented sealing module and the pressing overlapping sealing module is greater than or equal to one, depending on the size of the automatic compensation hole and the size of the sealing mating shaft, so as to realize the sealing of the automatic compensation hole and the sealing mating shaft.

[0023] Furthermore, the present invention also provides a method for using a sealing device for an automatic compensation hole, the specific steps of which are as follows:

[0024] S1. Design the dimensions of the relevant segmented sealing modules and the pressing and overlapping sealing modules. Based on the automatic compensation hole and the sealing fit requirements of the sealing shaft, select the appropriate number of segmented sealing modules and pressing and overlapping sealing modules.

[0025] S2. Install the segmented sealing module and the pressing overlapping sealing module in the sealing groove of the automatic compensation hole, with no protrusions on the circumference, so that the automatic compensation hole, the segmented sealing module and the pressing overlapping sealing module can be installed on the sealing mating shaft.

[0026] S3. Control oil is introduced through the control oil channel on the automatic compensation hole. It is then introduced through the damping holes of the corresponding segmented sealing module and the damping holes of the pressing overlapping sealing module. This pushes the mounting cylindrical base of the pressing overlapping sealing module and the mounting cylindrical base of the segmented sealing module outward by a certain distance, so that the sealing device is pushed outward and contacts the outer surface of the sealing mating shaft, forming an oil film support and seal. The magnitude of the sealing friction force can be controlled by controlling the pressure of the control oil channel on the automatic compensation hole.

[0027] In one embodiment of the present invention, if there is an eccentricity between the automatic compensation hole and the sealing mating shaft, the control oil channel on the automatic compensation hole can push and adjust the sealing device through the damping hole of the segmented sealing module and the damping hole of the pressing overlapping sealing module, as well as the corresponding segmented sealing module mounting cylindrical base and the pressing overlapping sealing module mounting cylindrical base, to ensure reliable contact between the automatic compensation hole and the sealing mating shaft and form an effective seal.

[0028] The principle of this invention is as follows:

[0029] This invention relates to a sealing device for an automatic compensation orifice, comprising: a segmented sealing module and a pressing and overlapping sealing module; control oil is introduced into the sealing device through throttling orifices on the segmented sealing module and the pressing and overlapping sealing module to achieve hydraulic oil film support and lubrication functions, so as to achieve reliable low-friction sealing under rotational or reciprocating motion; by adjusting the pressure of the control oil, the mating clearance between the sealing device and the sealing mating shaft can be controlled, adjusting the frictional resistance of the sealing surface, reducing leakage, and reducing heat generation between the sealing mating surfaces; the segmented sealing module and the pressing and overlapping sealing module can be selected to use copper, carbon steel, or graphite as the contact surface sealing material according to the system working pressure, so as to reduce the friction between the mating surfaces and form a reliable dynamic seal; the segmented sealing module and the pressing and overlapping sealing module adopt a modular design, segmented installation, and convenient installation and disassembly. It has the advantages of convenient processing, compact structure, simplicity, easy installation, convenient adjustment, simple maintenance, and mass production capability.

[0030] The segmented sealing module has a slightly concave center and convex sides, forming a "U"-shaped structure. The concave center communicates with the damping hole on its mounting base to reduce frictional resistance at the shaft-hole sealing mating surface, creating a hydraulic oil film support. The two convex edges of a certain thickness form two sealing rings to isolate the oil passages on both sides of the sealing strip. The mounting base of the segmented sealing module is a rectangular (or annular) columnar structure, with an installation depth much greater than the length required for compensation to achieve a seal (the sum of the radial clearance of the shaft-hole mating and the pre-installation radial retraction length). The two ends of the segmented sealing module have sealing strips with a deeper concave center and convex sides, allowing them to overlap and be compressed with the concave portion of the pressing and overlapping sealing module.

[0031] The overlapping sealing module can be divided into two parts: The first is the overlapping sealing section, which has a smooth, rounded center and raised sides, forming a concave structure. Both ends of the overlapping sealing section are deeply recessed in the middle, with raised sides forming a concave structure. The recessed part supports the segmented sealing block's sealing strip, and the height of the raised sides matches the height of the overlapping sealing block's sealing strip. The width of the recessed part matches the external dimensions of the segmented sealing block's sealing strip. The second part is the compression sealing section, which has a slightly recessed center and raised sides forming a concave structure. Its length when mating with the segmented sealing module is greater than the length of the segmented sealing block and the overlapping sealing section. Its width matches the recessed part in the middle of the segmented sealing module, and its height after installation matches the raised sides of both the overlapping sealing section and the segmented sealing strip. The compression sealing section and the overlapping sealing section are installed using embedded rivets or screws to avoid affecting the sealing fit between the mating surfaces.

[0032] The device employs a segmented sealing design with two structures. The quantity of each structure can be designed and selected according to the different hole-shaft fit dimensions to meet the sealing requirements of different hole-shaft fit sizes. It can satisfy both rotary hole-shaft sealing and axial reciprocating motion sealing requirements. This is especially useful for structures where the installation or removal of the seal requires machining a large number of axial grooves, and where there is a slightly large clearance or eccentricity in the hole-shaft fit. (This design completely avoids the drawbacks of conventional rubber elastic seals being cut off when passing through axial grooves, rubber elastic seals losing elasticity after expansion and becoming difficult to install, and the eccentricity in the hole-shaft fit causing poor sealing.)

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

[0034] 1. This invention, through the design of a novel split-type sealing device with two modular structures, achieves hole-shaft mating sealing, and has the advantages of convenient processing, compact and simple structure, easy installation, convenient adjustment, simple maintenance, and mass production capability.

[0035] 2. Through modular design, the present invention can design and select the quantity of each structure according to different hole and shaft fit dimensions, so as to meet the sealing requirements of hole and shaft fit of different sizes. It can meet both rotary hole and shaft sealing requirements and axial motion sealing requirements.

[0036] 3. This invention adjusts and controls the sealing pressure and measures the corresponding leakage to set requirements for low friction and low leakage for different hole-shaft fits;

[0037] 4. The present invention has an automatic compensation sealing function, which realizes the automatic compensation sealing function when the relevant hole-shaft mating clearance increases or when there is an eccentricity in the hole-shaft mating.

[0038] 5. The automatic compensation sealing function of this invention is also reflected in ensuring reliable sealing when the moving bearing is subjected to radial force;

[0039] 6. The present invention adopts an internal split hole installation. When installing or disassembling the seal, a large number of axially machined groove structures are required, which will not cause potential hidden dangers such as cut edges of the sealing structure and deformation that is not easy to recover. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of an automatic compensation hole installation seal according to the present invention;

[0041] Figure 2 This is a schematic diagram of a segmented sealing module;

[0042] Figure 3 Schematic diagram of the overlapping sealing module for compression;

[0043] Figure 4 This is an exploded view of an automatic compensation hole installation seal according to the present invention.

[0044] Explanation of reference numerals in the attached drawings: 1. Sealing device; 2. Segmented sealing module; 21. O-ring of segmented sealing module; 22. Oil mold support groove of segmented sealing module; 23. End overlap block of segmented sealing module; 24. End overlap groove of segmented sealing module; 25. Mounting cylindrical base of segmented sealing module; 26. Damping hole of segmented sealing module; 3. Pressing overlapping sealing module; 31. O-ring of pressing overlapping sealing module; 32. Oil mold support groove of pressing overlapping sealing module; 33. End overlap groove of pressing overlapping sealing module; 34. Pressing sealing block of pressing overlapping sealing module; 35. Mounting cylindrical base of pressing overlapping sealing module; 36. Damping hole of pressing overlapping sealing module; 4. Automatic compensation hole; 5. Sealing mating shaft; 6. Control oil channel; AA. Sectional view of segmented sealing module; BB. Sectional view of pressing overlapping sealing module. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0046] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] A sealing device 1 for an automatic compensation hole 4 is provided, wherein the sealing device 1 is located between the automatic compensation hole 4 and the sealing mating shaft 5, the automatic compensation hole 4 is provided with an annular mounting groove, and the sealing device 1 is used to prevent fluid leakage between the two sides of the automatic compensation hole 4.

[0049] The sealing device 1 is an assembled ring structure. The sealing device 1 includes a segmented sealing module 2 and a pressing and overlapping sealing module 3. The segmented sealing module 2 and the pressing and overlapping sealing module 3 are mutually supported and fixed. The segmented sealing module 2 and the pressing and overlapping sealing module 3 are arranged sequentially at intervals along the annular mounting groove of the automatic compensation hole 4.

[0050] In one embodiment of the present invention, the surface where the segmented sealing module 2 and the pressing overlapping sealing module 3 are in contact with the automatic compensation hole 4 is the bottom surface, and the surface where the segmented sealing module 2 and the pressing overlapping sealing module 3 are in contact with the sealing mating shaft 5 is the top surface. The bottom surface is a rectangular or annular columnar structure, and the longitudinal depth of the segmented sealing module 2 and the pressing overlapping sealing module 3 is greater than the longitudinal length of the automatic compensation hole 4 and the sealing mating shaft 5.

[0051] In one embodiment of the present invention, a control oil channel 6 is provided between the automatic compensation holes 4, and the number of the sealing mating shafts 5 is greater than or equal to one.

[0052] In one embodiment of the present invention, the segmented sealing module 2 includes a segmented sealing module oil mold support groove 22, a segmented sealing module end overlap block 23, a segmented sealing module end overlap groove 24, a segmented sealing module mounting cylindrical base 25, and a segmented sealing module damping hole 26.

[0053] The segmented sealing module mounting cylindrical base 25 has a slight concave center and protruding sides, forming a "U"-shaped structure. The concave center of the bottom surface of the segmented sealing module mounting cylindrical base 25 connects to the annular mounting groove. One end of the segmented sealing module end overlap block 23 connects to the segmented sealing module mounting cylindrical base 25, and the other end of the segmented sealing module end overlap block 23 connects to the segmented sealing module oil mold support groove 22. The segmented sealing module oil mold support groove 22 has segmented sealing module end overlap grooves 24 on both sides, and the segmented sealing module end overlap block 23 has end overlap grooves 24 on both ends. The notch is located in the center of the recessed middle part of the cylindrical base 25 for mounting the segmented sealing module, where a damping hole 26 for the segmented sealing module is provided. The damping hole 26 for the segmented sealing module penetrates the cylindrical base 25 for mounting the segmented sealing module, the end overlapping block 23 of the segmented sealing module, and the oil mold support groove 22 of the segmented sealing module. The damping hole 26 for the segmented sealing module is connected to the control oil channel 6. By setting a reasonable pilot pressure, the frictional resistance of the shaft hole sealing mating surface is reduced, forming a hydraulic oil film support. The raised edges on both sides of a certain thickness form two sealing ring surfaces to isolate the oil passages on both sides of the sealing band.

[0054] In one embodiment of the present invention, both ends of the cylindrical base 25 for mounting the segmented sealing module are provided with segmented sealing module sealing O-rings 21, which are used to control the leakage of pressure oil through the gap between the mounting bottom surface.

[0055] In one embodiment of the present invention, the pressing and overlapping sealing module 3 includes a pressing and overlapping sealing module oil mold support groove 32, a pressing and overlapping sealing module end overlap groove 33, a pressing and overlapping sealing module pressing and sealing block 34, a pressing and overlapping sealing module mounting cylindrical base 35, and a pressing and overlapping sealing module damping hole 36.

[0056] The cylindrical base 35 for mounting the overlapping sealing module has a smooth arc surface in the middle and protruding sides, forming a concave structure. The smooth arc surface in the middle of the cylindrical base 35 connects to the annular mounting groove. One end of the overlapping sealing module's pressing and sealing block 34 connects to the cylindrical base 35, and the other end connects to the oil mold support groove 32. The pressing and sealing block 34 has end overlap grooves 33 on both sides. A damping hole 36 for pressing and overlapping sealing modules is centrally located in the recessed middle part of the cylindrical base 35 for mounting the sealing module. The damping hole 36 for pressing and overlapping sealing modules passes through the cylindrical base 35 for mounting the sealing module, the sealing block 34 for pressing and overlapping sealing modules, and the oil mold support groove 32 for pressing and overlapping sealing modules. The damping hole 36 for pressing and overlapping sealing modules communicates with the control oil channel 6. By setting a reasonable pilot pressure, the frictional resistance of the shaft hole sealing mating surface is reduced, forming a hydraulic oil film support. The raised edges on both sides of a certain thickness form two sealing ring surfaces to isolate the oil passages on both sides of the sealing band.

[0057] In one embodiment of the present invention, both ends of the cylindrical base 35 for mounting the overlapping sealing module are provided with O-rings 31 for the overlapping sealing module. The O-rings 31 for the overlapping sealing module are used to control the leakage of pressure oil through the gap between the mounting bottom surface.

[0058] In one embodiment of the present invention, the segmented sealing module oil mold support groove 22 is connected to the pressing overlapping sealing module oil mold support groove 32, and the two ends of the pressing overlapping sealing module oil mold support groove 32 are located at the end overlap groove 24 of the segmented sealing module, and their dimensions are compatible.

[0059] The pressing and overlapping sealing module pressing and sealing block 34 is connected to the end overlapping block 23 of the segmented sealing module. The two ends of the end overlapping block 23 of the segmented sealing module are located at the end overlapping groove 33 of the pressing and overlapping sealing module, and their sizes are compatible.

[0060] In one embodiment of the present invention, the oil mold support groove 22 of the segmented sealing module and the oil mold support groove 35 of the pressing and overlapping sealing module are made of copper, carbon steel or graphite. The material is selected according to the working pressure of the system so as to reduce the friction between the segmented sealing module 2 and the pressing and overlapping sealing module 3 and the automatic compensation hole 4 and form a reliable dynamic seal.

[0061] In one embodiment of the present invention, the number of the segmented sealing module 2 and the pressing overlapping sealing module 3 is greater than or equal to one, depending on the installation size of the automatic compensation hole 4 and the size of the sealing mating shaft 5, so as to realize the sealing of the automatic compensation hole 4 and the sealing mating shaft 5.

[0062] Furthermore, the present invention also provides a method for using a sealing device for an automatic compensation hole, the specific steps of which are as follows:

[0063] S1. Design the dimensions of the relevant segmented sealing module 2 and the pressing overlapping sealing module 3. Based on the sealing requirements of the automatic compensation hole 4 and the sealing mating shaft 5, select the appropriate number of segmented sealing modules 2 and pressing overlapping sealing modules 3.

[0064] S2. Install the segmented sealing module 2 and the pressing overlapping sealing module 3 in the sealing groove of the automatic compensation hole 4, with no protrusions on the circumference, so that the automatic compensation hole 4, the segmented sealing module 2 and the pressing overlapping sealing module 3 can be installed on the sealing mating shaft 5.

[0065] S3. Control oil is introduced through the control oil channel 6 on the automatic compensation hole 4. The control oil is introduced through the damping hole 26 of the corresponding segmented sealing module and the damping hole 36 of the pressing overlapping sealing module. This pushes the pressing overlapping sealing module mounting cylindrical base 35 and the segmented sealing module mounting cylindrical base 25 to extend outward by a certain distance, so that the sealing device 1 is pushed outward to contact the outer surface of the sealing mating shaft 5, forming an oil film support and seal. The magnitude of the sealing friction force can be controlled by controlling the pressure of the control oil channel 6 on the automatic compensation hole 4.

[0066] In one embodiment of the present invention, if there is an eccentricity between the automatic compensation hole 4 and the sealing mating shaft 5, the control oil channel 6 on the automatic compensation hole 4 can push and adjust the sealing device 1 through the segmented sealing module damping hole 26, the pressing overlapping sealing module damping hole 36, and the corresponding segmented sealing module mounting cylindrical base 25 and the pressing overlapping sealing module mounting cylindrical base 35, to ensure reliable contact between the automatic compensation hole 4 and the sealing mating shaft 5 and form an effective seal.

[0067] Example

[0068] like Figures 1 to 4As shown, this embodiment provides a sealing device for an automatic compensation hole, which is an assembled ring structure, including: a segmented sealing module 2 and a pressing and overlapping sealing module 3; here, two of each type of sealing module are used. Figure 4 The illustrated examples are as follows.

[0069] In this embodiment, the sealing device 1 is installed on the automatic compensation hole 4 to form a sealing mating surface with the corresponding sealing mating shaft 5, preventing fluid leakage between the two sides of the sealing device 1. The control oil channel 6 is introduced into the segmented sealing module 2 through the segmented sealing module damping hole 26 and into the pressing overlapping sealing module 3 through the pressing overlapping sealing module damping hole 36. This achieves a hydraulic oil film support between the sealing device 1 and the sealing mating shaft 5 during motion, providing lubrication and ensuring reliable low-friction sealing during rotation or reciprocating motion. By adjusting the pressure of the control oil channel 6 on the automatic compensation hole 4, the mating clearance between the hole-mounted seal and the assembly shaft can be controlled, reducing leakage, frictional resistance, and heat generation between the sealing mating surfaces. The segmented sealing module 2 and the pressing overlapping sealing module 3 can be made of copper, carbon steel, or graphite as the contact sealing material, depending on the system working pressure, to reduce friction between the sealing surfaces and the hole shaft and form a reliable dynamic seal.

[0070] like Figure 2 As shown, the segmented sealing module 2 includes: a segmented sealing module O-ring seal 21, a segmented sealing module oil mold support groove 22, a segmented sealing module end overlap block 23, a segmented sealing module end overlap groove 24, a segmented sealing module mounting cylindrical base 25, and a segmented sealing module damping hole 26.

[0071] The O-ring seal 21 of the segmented sealing module is mainly used to prevent the control oil channel 6 on the sealing device 1 from leaking through the gap between the segmented sealing module mounting support 25 and the automatic compensation hole 4 to the working oil ports on both sides of the hole mounting seal. The control oil enters the area between the segmented sealing module oil mold support groove 22 and the sealing mating shaft 5 through the segmented sealing module damping hole 26, forming a certain hydraulic support. The pressure of the control cavity of the segmented sealing module mounting base 25 works together to form a sealing clamping force between the segmented sealing module 2 and the sealing mating shaft 5.

[0072] like Figure 3 As shown, there is a pressing and overlapping sealing module 3, a pressing and overlapping sealing module O-ring seal 31, a pressing and overlapping sealing module oil mold support groove 32, a pressing and overlapping sealing module end overlap groove 33, a pressing and overlapping sealing module pressing and sealing block 34, a pressing and overlapping sealing module mounting cylindrical base 35, and a pressing and overlapping sealing module damping hole 36.

[0073] The O-ring seal 31 of the compression overlapping sealing module is mainly used to prevent the control oil channel 6 on the sealing device 1 from leaking to the working oil ports on both sides of the sealing device 1 through the gap between the compression overlapping sealing module mounting support 35 and the automatic compensation hole 4. The control oil enters the area between the compression overlapping sealing module oil mold support groove 32 and the sealing mating shaft 5 through the compression overlapping sealing module damping hole 36, forming a certain hydraulic support. The pressure of the control cavity of the compression overlapping sealing module mounting base 35 works together to form a sealing clamping force between the segmented sealing module 3 and the compression overlapping sealing module mating shaft 5.

[0074] like Figure 1 As shown, the end overlapping block 24 on the segmented sealing module 2 and the end overlapping groove 33 on the pressing overlapping sealing module 3, as well as the end overlapping groove 23 on the segmented sealing module 2 and the pressing overlapping sealing module pressing sealing block 34 on the pressing overlapping sealing module 3, are finally assembled and fixed together to form an integral seal.

[0075] It adopts a modular design, with segmented installation, making installation and disassembly convenient. It has the advantages of easy processing, compact structure, simplicity, easy installation, convenient adjustment, easy maintenance, and remanufacturing and calibration.

[0076] Furthermore, the present invention also provides a method for using a sealing device for an automatic compensation hole, the specific steps of which are as follows:

[0077] S1. Design the dimensions of the relevant segmented sealing module 2 and the pressing overlapping sealing module 3. Based on the sealing requirements of the automatic compensation hole 4 and the sealing mating shaft 5, select the appropriate number of segmented sealing modules 2 and pressing overlapping sealing modules 3.

[0078] S2. Install the segmented sealing module 2 and the pressing overlapping sealing module 3 in the sealing groove of the automatic compensation hole 4, with no protrusions on the circumference, so that the automatic compensation hole 4, the segmented sealing module 2 and the pressing overlapping sealing module 3 can be installed on the sealing mating shaft 5.

[0079] S3. Control oil is introduced through the control oil channel 6 on the automatic compensation hole 4. The control oil is introduced through the damping hole 26 of the corresponding segmented sealing module and the damping hole 36 of the pressing overlapping sealing module. This pushes the pressing overlapping sealing module mounting cylindrical base 35 and the segmented sealing module mounting cylindrical base 25 to extend outward by a certain distance, so that the sealing device 1 is pushed outward to contact the outer surface of the sealing mating shaft 5, forming an oil film support and seal. The magnitude of the sealing friction force can be controlled by controlling the pressure of the control oil channel 6 on the automatic compensation hole 4.

[0080] In this embodiment, if there is an eccentricity between the automatic compensation hole 4 and the sealing mating shaft 5, the control oil channel 6 on the automatic compensation hole 4 can push and adjust the sealing device 1 through the segmented sealing module damping hole 26, the pressing overlapping sealing module damping hole 36, and the corresponding segmented sealing module mounting cylindrical base 25 and pressing overlapping sealing module mounting cylindrical base 35, to ensure reliable contact between the automatic compensation hole 4 and the sealing mating shaft 5 and form an effective seal.

[0081] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A sealing device for an automatic compensation hole, the sealing device (1) being located between the automatic compensation hole (4) and a sealing mating shaft (5), wherein the automatic compensation hole (4) is provided with an annular mounting groove, characterized in that, The sealing device (1) is used to prevent fluid leakage between the two sides of the automatic compensation hole (4). The sealing device (1) is an assembled ring structure. The sealing device (1) includes a segmented sealing module (2) and a pressing and overlapping sealing module (3). The segmented sealing module (2) and the pressing and overlapping sealing module (3) support and fix each other. The segmented sealing module (2) and the pressing and overlapping sealing module (3) are arranged sequentially at intervals along the annular mounting groove of the automatic compensation hole (4). A control oil channel (6) is provided between the automatic compensation holes (4), and the number of the sealing mating shafts (5) is greater than or equal to one; The segmented sealing module (2) includes a segmented sealing module oil mold support groove (22), a segmented sealing module end overlap block (23), a segmented sealing module end overlap groove (24), a segmented sealing module mounting cylindrical base (25), and a segmented sealing module damping hole (26). The cylindrical base (25) for mounting the segmented sealing module has a slight indentation in the middle and protrusions on both sides, forming a concave structure. The concave part in the middle of the bottom surface of the cylindrical base (25) for mounting the segmented sealing module is connected to the annular mounting groove. One end of the end overlapping block (23) of the segmented sealing module is connected to the cylindrical base (25) for mounting the segmented sealing module, and the other end of the end overlapping block (23) of the segmented sealing module is connected to the oil mold support groove (22) of the segmented sealing module. The oil mold support groove (22) of the segmented sealing module has segments on both sides. The end overlap groove (24) of the segmented sealing module has notches at both ends. The middle recess of the segmented sealing module mounting cylindrical base (25) is provided with a segmented sealing module damping hole (26). The segmented sealing module damping hole (26) passes through the segmented sealing module mounting cylindrical base (25), the segmented sealing module end overlap block (23) and the segmented sealing module oil mold support groove (22). The segmented sealing module damping hole (26) is connected to the control oil channel (6). The pressing and overlapping sealing module (3) includes a pressing and overlapping sealing module oil mold support groove (32), a pressing and overlapping sealing module end overlap groove (33), a pressing and overlapping sealing module pressing and sealing block (34), a pressing and overlapping sealing module mounting cylindrical base (35), and a pressing and overlapping sealing module damping hole (36). The cylindrical base (35) for mounting the overlapping sealing module has a smooth arc surface in the middle and protruding sides, forming a concave structure. The smooth arc surface in the middle of the cylindrical base (35) is connected to the annular mounting groove. One end of the sealing block (34) of the overlapping sealing module is connected to the cylindrical base (35), and the other end is connected to the oil mold support groove (32) of the overlapping sealing module. The sealing block (34) has end overlap grooves (33) on both sides for pressing and overlapping sealing modules. The pressing and overlapping sealing module mounting cylindrical base (35) has a pressing and overlapping sealing module damping hole (36) in the middle of the recess. The pressing and overlapping sealing module damping hole (36) passes through the pressing and overlapping sealing module mounting cylindrical base (35), the pressing and overlapping sealing module pressing and sealing block (34), and the pressing and overlapping sealing module oil mold support groove (32). The pressing and overlapping sealing module damping hole (36) is connected to the control oil channel (6).

2. The sealing device for an automatic compensation hole according to claim 1, characterized in that, The surface of the segmented sealing module (2) and the pressing overlapping sealing module (3) that connects with the automatic compensation hole (4) is the bottom surface. The surface of the segmented sealing module (2) and the pressing overlapping sealing module (3) that connects with the sealing mating shaft (5) is the top surface. The segmented sealing module (2) and the pressing overlapping sealing module (3) are columnar structures with rectangular or annular bottom surfaces. The longitudinal depth of the segmented sealing module (2) and the pressing overlapping sealing module (3) is greater than the longitudinal length of the automatic compensation hole (4) and the sealing mating shaft (5).

3. The sealing device for an automatic compensation hole according to claim 1, characterized in that, Both ends of the cylindrical base (25) for mounting the segmented sealing module are provided with segmented sealing module O-rings (21), which are used to control the leakage of pressure oil through the gap of the mounting bottom surface. Both ends of the cylindrical base (35) for mounting the overlapping sealing module are provided with O-rings (31) for the overlapping sealing module. The O-rings (31) for the overlapping sealing module are used to control the leakage of pressure oil through the gap between the mounting bottom surface.

4. A sealing device for an automatic compensation hole according to claim 1, characterized in that, The segmented sealing module oil mold support groove (22) is connected to the pressing overlapping sealing module oil mold support groove (32). The two ends of the pressing overlapping sealing module oil mold support groove (32) are located at the end overlap groove (24) of the segmented sealing module, and their sizes are compatible. The pressing and overlapping sealing module pressing and sealing block (34) is connected to the end overlapping block (23) of the segmented sealing module. The two ends of the end overlapping block (23) of the segmented sealing module are located at the end overlapping groove (33) of the pressing and overlapping sealing module, and their sizes are compatible.

5. A sealing device for an automatic compensation hole according to claim 1, characterized in that, The segmented sealing module oil mold support groove (22) and the pressing overlapping sealing module oil mold support groove (35) are made of copper, carbon steel or graphite.

6. A sealing device for an automatic compensation hole according to claim 1, characterized in that, The number of the segmented sealing module (2) and the pressing overlapping sealing module (3) is greater than or equal to one, and is used to achieve the sealing of the automatic compensation hole (4) and the sealing mating shaft (5).

7. A method of using a sealing device for an automatic compensation hole according to any one of claims 1-6, characterized in that, The specific steps are as follows: S1. Design the dimensions of the relevant segmented sealing module (2) and the pressing overlapping sealing module (3). According to the sealing requirements of the automatic compensation hole (4) and the sealing mating shaft (5), select the appropriate number of segmented sealing modules (2) and pressing overlapping sealing modules (3). S2. Install the segmented sealing module (2) and the pressing overlapping sealing module (3) in the sealing groove of the automatic compensation hole (4), with no protrusions on the circumference, so that the automatic compensation hole (4), the segmented sealing module (2) and the pressing overlapping sealing module (3) can be installed on the sealing mating shaft (5). S3. Control oil is introduced through the control oil channel (6) on the automatic compensation hole (4). The corresponding segmented sealing module damping hole (26) and the pressing overlapping sealing module damping hole (36) are respectively pushed to extend the pressing overlapping sealing module mounting cylindrical base (35) and the segmented sealing module mounting cylindrical base (25) a certain distance, so that the sealing device (1) is pushed outward to contact the outer surface of the sealing mating shaft (5) to form an oil film support and seal. The magnitude of the sealing friction force can be achieved by controlling the pressure of the control oil channel (6) on the automatic compensation hole (4).

8. The method of using the sealing device for an automatic compensation hole according to claim 7, characterized in that, If there is an eccentricity between the automatic compensation hole (4) and the sealing mating shaft (5), the control oil channel (6) on the automatic compensation hole (4) can push and adjust the sealing device (1) through the segmented sealing module damping hole (26) and the pressing overlapping sealing module damping hole (36) and the corresponding segmented sealing module mounting cylindrical base (25) and the pressing overlapping sealing module mounting cylindrical base (35), so as to ensure that the automatic compensation hole (4) and the sealing mating shaft (5) are in reliable contact and form an effective seal.

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