Adjusting device with built-in adjusting element in long guide inside flange

Abstract

A flange inner long guide built-in adjusting element adjusting device includes a first flange, a second flange, an adjusting element and a flexible graphite sealing ring; the adjusting element is divided into three parts of a pull-out end, a cylindrical section and a guide section, and the corresponding first flange is divided into parts of an end, a transition section, a matching section and a tail section, the cylindrical section and the guide section are arranged in a cavity of the first flange, the pull-out end cooperates with the end of the first flange and the end of the second flange to form a closed structure, the guide section is in intermittent contact with the inner wall of the cavity of the first flange, and a gap is formed between the outer wall of the cylindrical section and the inner wall of the cavity of the first flange. The application can effectively avoid the problem that the adjusting element is stuck and cannot be taken out due to thermal deformation after the test, can ensure that the adjusting element can be conveniently disassembled and assembled under the cold and hot states of the test, and can ensure that the adjusting element has no excessive stress concentration during use.

Description

Technical Field

[0001] This invention relates to an adjustment device with an internal guide adjustment element in a flange, belonging to the field of flow control technology. Background Technology

[0002] The method for adjusting the mixture ratio in a hydrogen-oxygen rocket engine involves installing regulating elements in large-diameter liquid hydrogen and liquid oxygen pipelines and gas flow ducts. These regulating elements can be cavitation pipes or gas nozzles. The liquid hydrogen and liquid oxygen cavitation pipes are installed inside the flanges of the hydrogen and oxygen auxiliary system ducts to control the flow rate and velocity of the media, thereby adjusting the liquid hydrogen-liquid oxygen mixture ratio. The gas nozzles are installed inside the flanges of the turbine gas flow ducts to regulate the gas flow rate in the turbine.

[0003] The adjusting element has a relatively long axial length. During design, it's crucial to ensure both reliable sealing and ease of assembly and disassembly, avoiding frictional interference with the flange's inner wall. If the outer diameter of the adjusting element is designed as a single-diameter cylinder, when the clearance between the adjusting element and the flange's inner wall is small, the contact area between the outer cylindrical surface and the flange's inner cavity will be large. During assembly and disassembly, the relative movement between the contact surfaces will generate friction, increasing the difficulty of assembling and disassembling the adjusting element. If the adjusting element contains a high-temperature medium, thermal deformation after testing may cause the adjusting element to become stuck and unable to be removed.

[0004] On the other hand, if the clearance between the outer circle of the adjusting element and the inner diameter of the flange is too large, the adjusting element will form a cantilever in the inner cavity of the flange. Under the high pressure and vibration environment of repeated test runs, stress concentration is likely to occur at the root of the limiting surface of the adjusting element, which may cause structural damage. Summary of the Invention

[0005] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and provide an adjustment device with an internal guide and built-in adjustment element in the flange. This device can not only ensure that the adjustment element can be easily disassembled and assembled under design tolerances and test hot and cold conditions, but also has a certain limiting function to ensure that the adjustment element does not have excessive stress concentration during use.

[0006] The technical solution of this invention is:

[0007] An adjustment device with an internal guide and built-in adjustment element in a flange includes a first flange, a second flange, and an adjustment element. Both the first flange and the second flange are provided with an end and a cavity. The adjustment element includes a pull-out end, a cylindrical section, and a guide section. The cylindrical section and the guide section are placed in the cavity of the first flange. The pull-out end cooperates with the end of the first flange and the end of the second flange to form a closed cavity structure. The guide section is in intermittent contact with the inner wall of the cavity of the first flange. A gap is formed between the outer wall of the cylindrical section and the inner wall of the cavity of the first flange. The adjustment element can be installed and removed after a high-temperature test by pulling out the end.

[0008] In the above-mentioned adjustment device, the pull-out end is obtained by flipping the cylindrical section of the adjustment element outward at a right angle, and the guide section is formed by flipping the cylindrical section of the adjustment element outward at an obtuse angle. The outer diameter of the pull-out end of the adjustment element is 5-6 mm larger than the outer diameter of the cylindrical section.

[0009] In the above-mentioned adjustment device, the guide section of the adjustment element contacts the inner wall of the first flange through intermittently provided bosses, and the bosses are evenly distributed along the circumference.

[0010] In the aforementioned adjusting device, the adjusting device with an internal guide and built-in adjusting element in the flange further includes a flexible graphite sealing ring; the cavity of the first flange includes a transition section, a mating section, and a tail section; the end of the first flange includes a sealing step, a limiting step, and a sealing surface; the end of the second flange includes a sealing boss; the flexible graphite sealing ring is placed in a wedge-shaped groove sealing structure formed by the sealing boss, the sealing surface of the adjusting element, the sealing step of the first flange, and the sealing surface of the first flange, and the compression amount of the graphite ring is adjusted by the deformation of the flexible graphite sealing ring by the sealing boss, and the final compression amount is 27% to 33%.

[0011] In the above-mentioned adjustment device, the pull-out end of the adjustment element includes a sealing surface, a limiting surface, and an end face; the pull-out end forms a limiting surface 52 perpendicular to the axial direction of the adjustment element, and the limiting surface of the adjustment element is in contact with the limiting step of the first flange, and the limiting step plays an axial limiting role for the adjustment element.

[0012] In the above-mentioned adjustment device, the outer wall of the guide section and the extension line of the outer wall of the cylindrical section are provided with a transition chamfer of 15 to 25°, and the limiting surface and the outer wall of the cylindrical section are provided with rounded corners.

[0013] In the aforementioned adjusting device, the height h1 of the limiting surface of the adjusting element is at least 1 mm greater than the sealing step height H1 of the first flange and is rounded upwards, with a tolerance of [missing information].

[0014] In the above-mentioned adjustment device, the end face of the pull-out end of the adjustment element is designed to fit with the bottom step of the sealing boss of the second flange with a clearance. The formula for calculating the clearance amount X3 is as follows:

[0015] X3 = (h3 - h2) + (H2 - h1)

[0016] Wherein, h3 is the height of the inner ring recess of the second flange, h2 is the height of the sealing boss of the second flange, H2 is the height of the limiting step of the first flange, and h1 is the height of the limiting surface of the adjusting element.

[0017] In the above-mentioned adjusting device, the gap between the end face of the adjusting element and the sealing boss of the second flange is in the range of 0.1 to 0.45 mm.

[0018] In the above-mentioned adjusting device, the gap between the transition section of the first flange and the cylindrical section of the adjusting element is in the range of 1.4 to 1.9 mm.

[0019] In the above-mentioned adjustment device, the first flange mating section and the adjustment element guide section are in a tight clearance fit, with a clearance range of 0.02 to 0.124 mm.

[0020] In the above-mentioned adjustment device, the guide section length k of the adjustment element is taken as 9 to 11 mm, and the width of the first flange mating section is obtained as K = k + 2.

[0021] In the above-mentioned adjustment device, the calculation formula for the outer diameter d1 of the cylindrical section of the adjustment element is as follows: d1 = D3 - 1, with a tolerance of ±0.2mm. The calculation formula for the diameter d2 of the guide section of the adjustment element is as follows: d2 = D3 + 0.5, with a tolerance grade of f9. Wherein, D3 is the effective inner diameter of the first flange.

[0022] In the aforementioned adjusting device, the diameter D1 of the first flange transition section is equal to the diameter d2 of the guide section of the adjusting element, and their tolerance is selected as follows: The diameter D2 of the mating section of the first flange is equal to the diameter D1 of the transition section of the first flange, and the tolerance is selected as grade H9.

[0023] In the above-mentioned adjustment device, the calculation formula for the recess height h3 of the inner ring of the second flange is: h3=h2+0.2, and its tolerance is selected as ±0.1mm, where h2 is the height of the sealing boss of the second flange.

[0024] In the above-mentioned adjustment device, the formula for calculating the total length L of the first flange is: L = l + 20, and the formula for calculating the total length of the end, transition section and mating section of the first flange is: L2 = l + 1, where l is the total length of the adjustment element.

[0025] The advantages of this invention over the prior art are as follows:

[0026] (1) The present invention designs an adjustment device with an internal guide and built-in adjustment element in a flange. The adjustment element is divided into three parts: pull-out end, cylindrical section and guide section. The corresponding mating flange is divided into end, transition section, mating section and tail section. The design of the pull-out end of the adjustment element ensures reliable sealing and facilitates disassembly and assembly, effectively avoiding the problem of the adjustment element being stuck and unable to be removed due to thermal deformation after the test.

[0027] (2) The cylindrical section of the adjusting element designed in this invention is relatively long. The nominal outer diameter of the cylindrical section is slightly smaller than the inner diameter of the flange. A certain gap is formed between the outer wall of the cylindrical section and the inner wall of the first flange cavity, which ensures the design requirements while avoiding contact between the adjusting element and the inner wall of the flange, thus avoiding inter-wall friction during disassembly.

[0028] (3) The chamfered transition between the guide section and the cylindrical section of the adjusting element and the rounded corner between the limiting surface and the cylindrical section in this invention effectively avoid stress concentration and increase the strength of the adjusting element.

[0029] (4) The guide section of the present invention has evenly distributed bosses on its outer circle, which minimizes the contact area while playing a guiding role, reducing the contact area between the adjusting element and the inner wall of the flange. The guide section has intermittent contact with the inner wall of the cavity of the first flange, effectively preventing interference during the disassembly and assembly of the adjusting element.

[0030] (5) The axial length of the guide section of the adjusting element in this invention that contacts the inner wall of the flange is relatively short. The guide section plays a role in fixing and guiding the adjusting element, avoiding stress concentration at the root of the pull-out end caused by excessive cantilever.

[0031] (6) This invention provides a method for calculating the main dimensions and tolerances of the adjusting element and its mating flange. Designing according to this method can ensure the accuracy and correct and reasonable fit between the dimensions. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the installation of the built-in adjustment element of the flange inner guide of the present invention;

[0033] Figure 2 This is a cross-sectional view of the built-in adjustment element of the flange inner guide of the present invention;

[0034] Figure 3 This is a cross-sectional view of the first flange of the present invention;

[0035] Figure 4 This is a cross-sectional view of the second flange of the present invention;

[0036] Figure 5 This is a diagram showing the tolerance fit between the inner and outer diameters of the first flange and the adjusting element in this invention. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1The diagram shows the installation of the flange-integrated guide adjustment element of the present invention. As shown in the diagram, the adjustment device of the flange-integrated guide adjustment element of the present invention includes a first flange 1, a second flange 3, an adjustment element 4, and a flexible graphite sealing ring 2. Both the first flange 1 and the second flange 3 are provided with ends and cavities. The adjustment element 4 includes a pull-out end 5, a cylindrical section 6, and a guide section 7. The cylindrical section and the guide section are placed inside the cavity of the first flange. The pull-out end cooperates with the ends of the first flange and the second flange to form a closed cavity structure. The guide section makes intermittent contact with the inner wall of the cavity of the first flange, and a gap is formed between the outer wall of the cylindrical section and the inner wall of the cavity of the first flange. This design facilitates the pulling out and replacement of the adjustment element from the cavity of the first flange. Even if the internal medium of the adjustment element is high-temperature, causing thermal deformation after testing, the adjustment element can still be pulled out through the pull-out end, avoiding the situation where it becomes stuck due to deformation and cannot be removed.

[0039] like Figure 2 The figure shows a cross-sectional view of the built-in adjusting element of the flange inner guide of the present invention. As can be seen from the figure, the pull-out end is obtained by flipping the cylindrical section of the adjusting element outward at a right angle, and the guide section is obtained by flipping the cylindrical section of the adjusting element outward at an obtuse angle. The outer diameter of the pull-out end 5 is 5-6 mm larger than the outer diameter of the cylindrical section 6. The adjusting element 4 is a variable inner diameter surface structure, and the inner surface is composed of three conical surfaces with different cone angles, which plays the role of adjusting the flow rate.

[0040] like Figure 2 As shown, the guide section 7 of the adjusting element contacts the inner wall of the first flange through three intermittently arranged bosses 71. The bosses are evenly distributed along the circumference, and the width n of the bosses is 7-9 mm, preferably 8 mm. This minimizes the contact area between the adjusting element and the inner wall of the flange while the adjusting element plays a guiding role, effectively preventing interference during the disassembly and assembly of the adjusting element.

[0041] like Figure 3 The figure shows a cross-sectional view of the first flange of the present invention. As can be seen from the figure, the cavity of the first flange 1 includes a transition section 12, a mating section 13, and a tail section 14; the end of the first flange 1 includes a sealing step 111, a limiting step 112, and a sealing surface 113; the end of the second flange includes a sealing boss 31.

[0042] like Figure 1 As shown, the flexible graphite sealing ring 3 is placed in the wedge-shaped groove sealing structure composed of the sealing boss 31, the sealing surface 51 of the adjusting element, the sealing step 111 of the first flange, and the sealing surface 113 of the first flange. The compression amount of the graphite ring is adjusted by the deformation of the flexible graphite sealing ring by the sealing boss, and the final compression amount is 27-33%.

[0043] like Figure 2As shown, the pull-out end 5 of the adjusting element includes a sealing surface 51, a limiting surface 52, and an end face 53. From the cross-sectional view, the sealing surface and the limiting surface, as well as the sealing surface and the end face, are connected at right angles. The pull-out end forms a limiting surface 52 perpendicular to the axial direction of the adjusting element. The limiting surface 52 of the adjusting element is in contact with the limiting step 112 of the first flange. The limiting step plays an axial limiting role for the adjusting element 4, preventing axial displacement of the adjusting element.

[0044] like Figure 2 As shown, the outer wall of the guide section and the extended line of the outer wall of the cylindrical section are provided with a transition chamfer of 15 to 25°. The limiting surface and the outer wall of the cylindrical section are provided with rounded corners. The transition chamfer design between the cylindrical section and the guide section prevents stress concentration on the boss 71 of the guide section. The chamfer design between the limiting surface and the cylindrical section prevents stress concentration at the root of the limiting surface 52, thereby increasing the strength of the adjusting element.

[0045] Based on the design requirements of the flange seal, determine the sealing boss height h2 of the second flange and the sealing step height H1 of the first flange; the limiting step height H2 is equal to the limiting surface height h1 of the adjusting element, and the tolerance is selected as [tolerance value missing]. The height h1 of the limiting surface of the adjusting element 4 is at least 1 mm greater than the height H1 of the sealing step of the first flange 1 and is rounded upwards, with a tolerance of [missing value].

[0046] The end face 53 of the adjusting element pull-out end is designed to fit with the bottom step of the second flange sealing boss 31 with a clearance. The formula for calculating the clearance X3 is as follows: X3=(h3-h2)+(H2-h1), where h3 is the height of the inner ring recess of the second flange, h2 is the height of the sealing boss of the second flange 3, H2 is the height of the limiting step of the first flange 1, and h1 is the height of the limiting surface of the adjusting element 4. The clearance range between the end face 53 of the adjusting element and the sealing boss 31 of the second flange is 0.1~0.45mm, which can effectively avoid interference between the end face of the sealing section of the adjusting element and the bottom step of the sealing boss of the second flange, thereby ensuring that the first flange and the second flange fit tightly after installation, making the groove depth of the sealing boss consistent with the height of the boss, and ensuring that the compression of the flexible graphite sealing ring reaches the required value.

[0047] In this invention, the gap between the transition section 12 of the first flange and the cylindrical section 6 of the adjusting element is 1.4–1.9 mm, effectively avoiding surface contact between the adjusting element and the inner wall of the first flange. The mating section 13 of the first flange and the guide section 7 of the adjusting element have a tight clearance fit, with the tolerance selection principle being the hole tolerance H9 and the shaft tolerance f9, and the gap range being 0.02–0.124 mm. The length k of the guide section 7 of the adjusting element is 9–11 mm, preferably 10 mm, resulting in the width K of the mating section 13 of the first flange being K = k + 2. If the gap between the mating section and the guide section is too small, the fit will be too tight, increasing friction during the assembly and disassembly of the adjusting element and making assembly and disassembly difficult. If the gap between the mating section and the guide section is too large, one end of the adjusting element cannot be effectively fixed, forming a cantilever. During the test run, long-term vibration will cause stress concentration at the root of the limiting surface. This design effectively fixes the guide end of the adjusting element, avoiding stress concentration at the root of the limiting surface of the adjusting element caused by excessive cantilever.

[0048] The formula for calculating the outer diameter d1 of the cylindrical section 6 of the adjusting element is as follows: d1 = D3 - 1, with a tolerance of ±0.2mm. The formula for calculating the diameter d2 of the guide section 7 of the adjusting element is as follows: d2 = D3 + 0.5, with a tolerance grade of f9, where D3 is the effective inner diameter of the first flange.

[0049] The diameter D1 of the first flange transition section 12 is equal to the diameter d2 of the guide section 7 of the adjusting element, and their tolerance is selected as follows: The diameter D2 of the mating section 13 of the first flange is equal to the diameter D1 of the transition section of the first flange, and its tolerance is selected as grade H9.

[0050] like Figure 4 The figure shown is a cross-sectional view of the second flange of the present invention. The calculation formula for the inner ring recess height h3 of the second flange is: h3=h2+0.2, and its tolerance is selected as ±0.1mm, where h2 is the height of the sealing boss of the second flange.

[0051] The formula for calculating the total length L of the first flange is: L = l + 20. The formula for calculating the total length of the end, transition section and mating section of the first flange is: L2 = l + 1, where l is the total length of the adjusting element.

[0052] Specific steps for installing and removing the adjustment device:

[0053] (1) The adjusting element is installed inside the first flange, with its limiting surface fitting against the flange's limiting step. The sealing surface of the adjusting element, together with the inner sealing surface and sealing step of the first flange, forms a sealing groove. Figure 3 As shown;

[0054] (2) Insert the flexible graphite sealing ring into the sealing groove;

[0055] (3) Connect the second flange to the first flange. Insert the sealing boss of the second flange into the sealing groove of the first flange. After the flexible graphite sealing ring is pressed, it will be deformed by compression. The structure of the second flange is as follows: Figure 4 As shown. At this point, bolts are inserted into the circumferential bolt holes of both flanges and tightened with self-locking nuts until the end faces of the two flanges are in contact, the flexible graphite sealing ring reaches its maximum compression of about 30%, and the adjusting device forms a sealing structure;

[0056] (4) After the test, disassemble and replace the adjustment element, loosen the self-locking nut, remove the second flange, take out the flexible graphite sealing ring, and pull out the pull-out end of the adjustment element to remove the adjustment element.

[0057] This invention uses a certain adjusting device as an example to illustrate the design and selection of relevant tolerance and fit dimensions.

[0058] (1) According to the engine system design requirements, the effective inner diameter D3 of the first flange and the effective inner diameter D4 of the second flange are both determined to be 30mm.

[0059] (2) Based on the design requirements of the flange seal, the height h2 of the sealing boss of the second flange is determined as follows: The sealing step height H1 of the first flange is determined to be 4.7 mm;

[0060] (3) Determine the relevant dimensions of the adjusting element: the height h1 of the limiting surface is 1mm larger than H1 and rounded upwards. Its dimensions and tolerances are as follows: The total length l of the adjusting element is 60mm based on the inner surface design; the guide section length k is selected as 10mm; d1 is calculated to be Φ29±0.2mm according to the formula and tolerance selection method; d2 is calculated to be... The width n of the guide section limit step of the adjustment element is selected to be 8mm.

[0061] (4) Determine the relevant dimensions of the first flange: Select and determine the height H2 of the first flange limiting step and its tolerance as follows: The diameter D1 of the transition section is selected as... Select the diameter D2 of the mating section as The calculated length L2 of the mating section is 61mm; the calculated width K of the mating section is 12mm; and the calculated total flange length L is 80mm.

[0062] (5) Determine the relevant dimensions of the second flange: According to the formula and tolerance selection method, the inner ring recess height h3 is 2.1±0.1mm.

[0063] The effects of the fit clearance design are analyzed below.

[0064] To avoid interference between the end face of the sealing section of the adjusting element and the bottom step of the sealing boss of the second flange, a clearance fit design is used, with a clearance of X3, see [reference needed]. Figure 1 The gap calculation method is as follows:

[0065] X3 = (h3 - h2) + (H2 - h1)

[0066] The nominal value of the gap X3 between the two is calculated to be 0.2 mm. Considering the tolerance value of each dimension, the minimum and maximum gaps between the two are calculated, and the gap range is 0.1 to 0.45 mm, ensuring that there is no interference during assembly between the two.

[0067] The inner diameter D1 of the transition section of the first flange is The inner diameter d1 of the long cylindrical section of the adjusting element is Φ29±0.2mm, and the nominal clearance value is D1-d1=1.5mm. Considering the dimensional tolerances of both, the maximum and minimum clearances are calculated. The clearance range is 1.4~1.9mm, and the minimum clearance is 1.4mm. This effectively avoids surface contact and contact with the inner wall of the flange.

[0068] like Figure 5 The diagram shows the tolerance fit between the inner and outer diameters of the first flange and the adjusting element of the present invention. In the diagram, G1 is the inner diameter tolerance zone of the transition section of the first flange; G2 is the outer diameter tolerance zone of the cylindrical section of the adjusting element; G3 is the inner diameter tolerance zone of the mating section of the first flange; G4 is the outer diameter tolerance zone of the guide section of the adjusting element; and the inner diameter of the mating section of the first flange... outer diameter of the guide section of the adjusting element The two parts are a tight clearance fit, and the tolerance selection principle is hole H9 and shaft f9. The calculation method for the clearance X2 is as follows: X2 MAX =D2 MAX -d2 MIN X2 MIN =D2 MIN -d2 MAX The minimum and maximum clearances were calculated, with a range of 0.02–0.124 mm and a minimum clearance of 0.02 mm. This design effectively fixes the guide end of the adjusting element, preventing stress concentration at the root of the adjusting element's limiting surface caused by excessive cantilever.

[0069] The above description is only the best specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

[0070] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. An adjustment device with an internal adjusting element built into a flange guide, characterized in that... include: First flange (1), second flange (3), adjusting element (4); both the first flange (1) and the second flange (3) are provided with ends and cavities. The adjusting element (4) includes a pull-out end (5), a cylindrical section (6) and a guide section (7). The cylindrical section and the guide section are placed in the cavity of the first flange. The pull-out end cooperates with the ends of the first flange and the second flange to form a closed cavity structure. The guide section is in intermittent contact with the inner wall of the cavity of the first flange. A gap is formed between the outer wall of the cylindrical section and the inner wall of the cavity of the first flange. The adjusting element can be installed and removed after the high temperature test by pulling out the end. It also includes a flexible graphite sealing ring (2); the cavity of the first flange (1) includes a transition section (12), a mating section (13), and a tail section (14); the end of the first flange (1) includes a sealing step (111), a limiting step (112), and a sealing surface (113); the end of the second flange includes a sealing boss (31); the flexible graphite sealing ring (2) is placed in a wedge-shaped groove sealing structure composed of the sealing boss (31), the sealing surface (51) of the adjusting element, the sealing step (111) of the first flange, and the sealing surface (113) of the first flange. The compression amount of the graphite ring is adjusted by the deformation of the flexible graphite sealing ring by the sealing boss, and the final compression amount is 27~33%. The inner diameter of the first flange mating section is Φ30.

5. mm, outer diameter of the guide section of the adjusting element Φ30.5 mm, the two are a tight clearance fit; The inner diameter D1 of the transition section of the first flange is Φ30.

5. mm, inner diameter of the long cylindrical section of the adjusting element The value is Φ29±0.2mm, and the nominal gap value is D1-d1=1.5mm; The mating section (13) of the first flange and the guide section (7) of the adjusting element are in tight clearance fit, with a clearance range of 0.02 to 0.124 mm; The diameter D1 of the first flange transition section (12) is equal to the diameter d2 of the adjusting element guide section (7), and their tolerance is selected as follows: mm; diameter of the mating section (13) of the first flange Diameter of the transition section with the first flange They are equal, and their tolerance is selected as grade H9; The guide section (7) of the adjustment element contacts the inner wall of the first flange through intermittently set bosses (71), and the bosses are evenly distributed along the circumference.

2. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: The pull-out end (5) is obtained by flipping the cylindrical section of the adjusting element outward at a right angle, and the guide section (7) is obtained by flipping the cylindrical section of the adjusting element outward at an obtuse angle. The outer diameter of the pull-out end (5) of the adjusting element is 5-6 mm larger than the outer diameter of the cylindrical section (6).

3. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: The pull-out end (5) of the adjusting element includes a sealing surface (51), a limiting surface (52), and an end face (53); the pull-out end forms a limiting surface (52) perpendicular to the axial direction of the adjusting element, and the limiting surface (52) of the adjusting element is in contact with the limiting step (112) of the first flange, and the limiting step plays an axial limiting role for the adjusting element (4).

4. The adjusting device with an internal guide adjustment element in a flange according to claim 3, characterized in that: The outer wall of the guide section (7) and the extended line of the outer wall of the cylindrical section (6) have a transition chamfer of 15~25°, and the limiting surface (52) and the outer wall of the cylindrical section (6) are provided with rounded corners.

5. The adjusting device with an internal guide adjustment element in a flange according to claim 4, characterized in that: The height of the limiting surface of the adjusting element (4) At least higher than the sealing step height of the first flange (1) Larger than 1mm and rounded upwards, tolerance is mm.

6. The adjusting device with an internal guide adjustment element in a flange according to claim 3, characterized in that: The end face (53) of the pull-out end of the adjusting element is designed to fit with the bottom step of the second flange sealing boss (31) with a clearance, the clearance amount being... The calculation formula is as follows: in, The inner ring recess height of the second flange (3) is... The height of the sealing boss of the second flange (3) is... The height of the limiting step for the first flange (1) is [not specified]. The height of the limiting surface of the adjusting element (4) is defined.

7. The adjusting device with an internal guide adjustment element in a flange according to claim 3, characterized in that: The gap between the end face (53) of the adjusting element and the sealing boss (31) of the second flange is 0.1 to 0.45 mm.

8. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: The gap between the transition section (12) of the first flange and the cylindrical section (6) of the adjusting element is 1.4 to 1.9 mm.

9. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: The length of the guide section (7) of the adjusting element The value is taken as 9~11mm to obtain the width of the first flange mating section (13). .

10. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: The outer diameter of the cylindrical section (6) of the adjusting element The calculation formula is as follows: Its tolerance is ±0.2mm, and the diameter of the guide section (7) of the adjusting element is... The calculation formula is as follows: Its tolerance zone is grade f9, where D3 is the effective inner diameter of the first flange.

11. The adjusting device with an internal adjusting element for a flange guide as described in claim 1, characterized in that: Second flange inner ring recess height The calculation formula is: And its tolerance is selected as ±0.1mm, where, The height of the sealing boss of the second flange.

12. The adjusting device with an internal guide adjustment element in a flange according to claim 1, characterized in that: First flange total length The calculation formula is: The formula for calculating the total length of the end of the first flange, the transition section, and the mating section is as follows: ,in, The total length of the adjusting element.

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