A spindle separation dynamic seal testing device and installation and adjustment method

Abstract

The present invention relates to the field of sealing technology, and specifically to a spindle-separated dynamic seal testing device and an installation and adjustment method. The present invention includes a base and a support body that is rotatably matched with a built-in sealing main cavity on the base; the axis of the support body is horizontally arranged and coaxially penetrated by a spindle, and the spindle and at least one end of the support body constitute a sealing match for testing the dynamic seal, and the corresponding end of the support body constituting the sealing match is an axially detachable structure, so as to replace the dynamic seal in time; the two ends of the spindle extend axially outward, and a bearing support coaxial with the spindle is symmetrically arranged on the base, and a matching shaft is rotatably matched on the bearing support, and the spindle is coaxially and detachably installed on the matching shaft; the spindle or the matching shaft is connected to an external power source. The present invention has a reasonable and practical structure, and can still maintain high-precision and high-efficiency online testing requirements under repeated disassembly and assembly.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a spindle-separated dynamic sealing testing device and an installation and adjustment method. Background Art

[0002] Dynamic seals are key basic components and are widely used in rotating equipment such as pumps, fans and compressors. Their function is to prevent the sealed medium from leaking along the shaft end to ensure the operating efficiency and safety of the equipment. With the advancement of industrial technology, equipment is developing towards high efficiency and lightweight, resulting in higher and higher operating parameters, and more stringent requirements on the performance and service life of dynamic seals. The working mechanism of the service lubricating film of dynamic seals is complex, and theoretical research involves multidisciplinary intersections, making it difficult to form a systematic theoretical system. Frequent tests are often required to obtain seal design criteria and test seal performance under various working conditions. The importance of test devices to the development of dynamic seal products is self-evident, and the efficiency and accuracy of their test data are related to the application timeliness and safety of sealing products. The current dynamic seal test device has strict requirements on the axial size of the test seal during installation, resulting in a narrow range of application objects, and it is very easy to affect the test accuracy during repeated assembly and disassembly, and the test efficiency is relatively low; some devices have relatively high test accuracy but are difficult to adjust and maintain, and the test seal assembly and disassembly adjustment process is also very complicated, affecting the test efficiency. Therefore, it is urgent to solve. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a spindle-separated dynamic seal testing device, which has a reasonable and practical structure and can still maintain high-precision and high-efficiency online testing requirements under repeated disassembly and assembly.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A spindle-separated dynamic seal testing device, characterized in that it includes a base and a support body with a built-in sealing main cavity that is rotatably matched on the base; the support body is horizontally arranged with its axis and coaxially penetrated by the spindle, the spindle and at least one end of the support body constitute a sealing fit for testing the dynamic seal, and the corresponding end of the support body constituting the sealing fit is an axially detachable structure to facilitate timely replacement of the dynamic seal; both ends of the spindle extend axially outward, bearing supports that are coaxial with the spindle are symmetrically arranged on the base, a mating shaft is rotatably matched on the bearing support, and the spindle is coaxially and detachably installed on the mating shaft; the spindle or the mating shaft is connected to an external power source.

[0006] Preferably, a mating hole for accommodating a compression spring is coaxially recessed at the main shaft, one end of the compression spring is pressed against the bottom of the mating hole, and the other end of the compression spring extends axially and cooperates with the sliding stopper to form a fixed fit between the connecting rod in the mating hole; the corresponding end of the mating shaft is recessed with a mounting hole for the connecting rod to slide axially into and form a stopper fit with it.

[0007] Preferably, the connecting rod is a straight rod body with a cross section that is a spur gear shape or a semicircular square or triangle shape; the cavity shapes of the matching hole and the mounting hole match the outer shape of the connecting rod.

[0008] Preferably, the adjacent ends of the mating shaft and the main shaft are both recessed with avoidance holes for inserting the mounting screws, and the avoidance holes extend axially and correspondingly penetrate the adjacent end faces of the mating shaft and the main shaft, thereby forming a U-shaped avoidance groove for guiding the mounting screws; the mounting screws are inserted into the connecting rod through the avoidance groove and form a threaded fit with the threaded hole on the connecting rod, and can perform axial reciprocating motion along the groove depth direction of the avoidance groove.

[0009] Preferably, adjacent ends of the mating shaft and the main shaft are both arranged with small shaft diameter sections with matching shaft shoulders; the device also includes a connecting kit, which includes a petal-type positioning ring, a middle adjustment disk and a side adjustment disk which are sequentially axially sleeved along the small shaft diameter section, and the middle adjustment disk and the side adjustment disk are fastened to each other by axial screws; the outer wall of the middle adjustment disk is a two-stage stepped shaft shape, and the cylindrical cavity of the side adjustment disk is a two-stage stepped hole shape, and when the middle adjustment disk and the side adjustment disk are in contact with each other, the small diameter section of the middle adjustment disk is inserted into the large aperture section of the side adjustment disk; the total axial length of the petal-type positioning ring, the middle adjustment disk and the side adjustment disk is equal to the distance between the matching shaft shoulders.

[0010] Preferably, the support body is cylindrical in shape, including a straight sleeve-shaped barrel and a left end cover and a right end cover forming two end covers of the barrel, and both end covers are fastened to the corresponding end faces of the barrel by end screws; both end covers are coaxially penetrated with a through hole for the main shaft to pass through, and the main shaft is rotatably engaged in the through hole through a coaxially sleeved adjusting sleeve; the inner end of the adjusting sleeve located at the sealing main cavity is coaxially installed with a dynamic ring, and the inner end face of the corresponding end cover is fixed with a static ring, and a dynamic seal is formed between the dynamic ring and the static ring.

[0011] Preferably, the inner end of the adjusting sleeve is provided with an outer flange to form a stop for the movable ring to be placed; the inner end surface of the corresponding end cover is concavely provided with an annular groove, and a spring portion for pressing the static ring against the movable ring is sandwiched between the static ring and the bottom of the annular groove.

[0012] Preferably, the outer end of the adjusting sleeve is fixed by a locking ring coaxially threadedly engaged with the main shaft.

[0013] Preferably, the bearing on the base is matched with a swivel support seat with a vertically arranged swivel axis; the swivel support seat has a fixed arm extending toward the outer cylinder wall of the support body; the swivel support seat and the base are positioned with each other by a vertical positioning pin.

[0014] Preferably, an installation and adjustment method using the spindle separation dynamic seal testing device is characterized by comprising the following steps:

[0015] S1. Insert the mounting screw into the avoidance groove and screw it into the threaded hole. Slide the mounting screw horizontally to drive the connecting rod to slide and compress the compression spring. When the connecting rod completely leaves the mating shaft, rotate the main shaft so that the connecting rod, due to its own anti-rotation structure, acts with the compression spring and is pressed against the mating end face of the mating shaft.

[0016] S2. Pull out the positioning pin, keep the support body and the bearing support in a loose state, rotate the slewing support seat 90 degrees, then remove the left end cover and / or the right end cover, and install the dynamic ring and the static ring;

[0017] S3. Reinstall the corresponding end caps, keep the support body and the bearing support in a loose state, rotate the slewing support seat 90 degrees in the opposite direction, and re-insert the positioning pins to fix the support body and the slewing support seat on the base;

[0018] S4. Turn the main shaft so that the connecting rod slides out from the end of the main shaft by the elastic force of the compression spring and enters the mounting hole at the mating shaft. Then remove the mounting screws and start the dynamic seal test.

[0019] The beneficial effects of the present invention are:

[0020] 1) Through the above scheme, on the one hand, the left end, middle section and right end of the entire rotating shaft are symmetrically supported by the bearing support on the left, the support body and the bearing support on the right, so that the present invention can simultaneously realize the testing requirements of two sets of dynamic seals at both ends of the support body, ensuring its high efficiency. On the other hand, by splitting the entire rotating shaft into a three-section shaft body, that is, including the mating shaft on the left, the main shaft in the middle and the mating shaft on the right, the main shaft and the corresponding mating shaft are connected and separated by a slidable connecting rod, so that the free separation and combination effect can be quickly realized according to the needs; when separated, the independent rotation action of the support body is realized, freeing up more installation space, thereby ensuring the rapid axial replacement requirements of the dynamic seal; when combined, the anti-rotation structure of the connecting rod and the overall symmetrical structure of the present invention can be relied on to ensure the reliability of the overall torque transmission of the rotating shaft, and high-precision bearing support and working requirements are achieved, with remarkable results.

[0021] Thus, the present invention not only ensures the high accuracy of the test, but also makes the dynamic seal test installation process fast and efficient, and can effectively improve the accuracy and efficiency of the dynamic seal test under repeated disassembly and assembly. Even when necessary, the present invention can not only test the dynamic seal, but also be placed in other radial seal occasions such as graphite rings to meet its testing needs. The structure is reasonable and practical, and the scope of application can be further improved.

[0022] 2) In actual design, the mating shaft and the main shaft can be disassembled in multiple groups, such as by using a transition sleeve or a transition flange to connect each other detachably. Considering the further high efficiency requirements, the present invention preferably uses a non-rotating connecting rod such as a spline or even a square rod, thereby ensuring the high efficiency of axial sliding and ensuring the effective transmission of torque and power between the main shaft and the mating shaft, achieving multiple goals at one stroke.

[0023] 3) Considering that the connecting rod of the spline structure is deeply buried in the mounting hole, in actual operation, it is necessary to rely on the external mounting screws as handles to achieve the lateral push and pull requirements of the connecting rod; and the lateral push and pull path of the mounting screws is restricted and guided by the avoidance groove to improve its practicality and flexibility of use.

[0024] 4) When necessary, since the avoidance groove is exposed to the outside and the end face clearance between the mating shaft and the main shaft is also exposed to the outside, external dust and other debris may enter the connecting rod, thereby affecting the action of the connecting rod or causing poor connection between the mating shaft and the main shaft. Therefore, the present invention is also provided with a connection kit. In addition, the design of the connection kit is also convenient for achieving the coaxiality control purpose of the mating shaft and the main shaft, further improving the matching stability and working reliability of the two shaft bodies. In actual design, the connection kit includes a petal-type positioning ring, a middle adjustment disk and a side adjustment disk which are sequentially sleeved along the axial direction of the small shaft diameter section; each time the mating shaft and the main shaft need to be disassembled, the petal-type positioning ring is removed, and the middle adjustment disk is slid to expose the avoidance groove.

[0025] 5) During design, two sets of dynamic seals can be installed at both ends of the support body of the present invention for testing, and the performance of the two sets of dynamic seals can be evaluated separately, which improves production efficiency and reduces production costs. The disassembly and assembly of the two sets of dynamic seals can be achieved by disassembling and assembling the left end cover and the right end cover, which is very convenient to use.

[0026] 6) Based on the above structure, the present invention can also meet the test requirements of test objects with multiple shaft diameter ranges by replacing the main shaft or adjusting the sleeve, so as to perform dynamic seal tests of different types and specifications according to the on-site conditions. It has a very wide range of applications and stronger versatility.

[0027] 7) The present invention has a simple structure and is easy to operate. The bottom rotating bearing drives the slewing support seat to move, and then the support body and other components are rotated to a position suitable for operation, and then the dynamic seal is disassembled and installed, and then the support body is reset to carry out the test process. The whole process saves time and effort, and the initial positioning accuracy can be maintained through the bottom rotating bearing and positioning pins. Actual measurements have proved that the present invention can fully meet the predetermined operation requirements and achieve the purpose of dynamic seal testing with high efficiency and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 for Figure 1 AA section view;

[0030] Figure 3 for Figure 1 A partial enlarged view of part I;

[0031] Figure 4 This is the matching diagram of the mounting screw, connecting rod and main shaft;

[0032] Figure 5 It is the matching relationship diagram between the main axis and the matching axis;

[0033] Figure 6 The figure shows the assembly diagram of the connection kit.

[0034] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0035] a-dynamic ring b-static ring

[0036] 10-base 20-support body 21-body 22-left end cover 23-right end cover

[0037] 31-main shaft 32-matching shaft 33-avoidance groove 40-bearing support

[0038] 51-Compression spring 52-Connecting rod 53-Mounting screw

[0039] 61-petal type positioning ring 62-middle adjustment disk 63-side adjustment disk 64-axial screw

[0040] 70-adjusting sleeve 71-outer flange 80-locking ring

[0041] 90-swivel support seat 91-fixed arm 100-positioning pin DETAILED DESCRIPTION

[0042] For ease of understanding, the specific structure and working mode of the present invention are further described below:

[0043] The specific implementation structure of the present invention can refer to Figure 1-6 As shown, it includes a base 10 and bearing supports 40 symmetrically mounted at both ends of the base 10, and the two sets of bearing supports 40 are coaxially arranged with matching shafts 32. Figure 1 As shown, the left-side mating shaft 32 is radially supported by the left bearing installed in the left-side bearing support 40, and the right-side mating shaft 32 is radially supported by the right bearing installed in the right-side bearing support 40. At the symmetric plane between the two sets of bearing supports 40, a support body 20 with a sealed main cavity is arranged, and the support body 20 is matched on the base 10 by a slewing support seat 90 with a fixed arm 91. During operation, the left-side mating shaft 32 and the right-side mating shaft 32 are connected to the main shaft 31 through a connecting rod 52, and the axes of the left-side mating shaft 32, the main shaft 31 and the right-side mating shaft 32 are kept coincident. The sealed main cavity is passed through by the main shaft 31 and fixed on the support body 20 by the fixed arm 91, and the axial distances between the ends of the main shaft 31 and the left and right ends of the support body 20 are equal. In addition, the slewing support seat 90 and the base 10 are connected by a bottom rotating bearing and positioned together by a positioning pin 92. At this point, the present invention can achieve the rapid separation and combination of the matching shaft 32 at the left side, the main shaft 31 and the matching shaft 32 at the right side by sliding the aforementioned connecting rod 52, which not only ensures the test accuracy but also improves the test efficiency.

[0044] Furthermore, the connecting rod 52 has two groups, namely, a left spline and a right spline. The left end of the left spline is installed in the mounting hole of the mating shaft 32 on the left side, and the right end is installed in the mating hole on the left end face of the main shaft 31. The left end of the right spline is installed in the mating hole of the main shaft 31, and the right end is installed in the mounting hole of the mating shaft 32 on the right side. There are two groups of compression springs 51 inside the mating hole of the main shaft 31, so as to realize the elastic expansion and contraction function of the corresponding connecting rod 52; of course, in actual operation, the compression spring 51 can also be installed in the mounting hole.

[0045] In actual design, there are two sets of fixed arms 91, which are symmetrically installed on the outer wall of the support body 20. Figure 2 When assembling, the fixed arm 91, the swivel support seat 90 and the support body 20 with the sealed main cavity are fastened by bolts or screws. Figure 1 As shown, the support body 20 is composed of a cylindrical body 21 in the middle and a left end cap 22 and a right end cap 23 at both ends of the body 21. A left seal is arranged at the left end cap 22, and a right seal is arranged at the right end cap 23. Both sets of seals are fixed by corresponding end caps, adjusting sleeves and locking rings 80. During assembly, each seal includes a dynamic ring a and a static ring b. The static ring b is fixed at the corresponding end cap, and the dynamic ring a is installed at the stop formed by the outer flange 71 of the adjusting sleeve 70 to achieve the following Figure 1The symmetrical double dynamic seal structure shown in the figure. Thus, the present invention can test two sets of dynamic seals at the same time, and the left seal and the right seal can be individually evaluated for their performance, thereby improving production efficiency and reducing production costs.

[0046] Of course, the connecting rod 52 can be a spline structure, that is, a straight rod with a spur gear-shaped cross section; it can also be a rod structure with a rotation-stop structure such as a semicircular rod or a square rod, and the hole shape of the matching hole and the mounting hole is also adapted to the shape of the connecting rod 52 to ensure that the connecting rod 52 can have both torque and power transmission functions during the sliding action. The outer wall of the connecting rod 52 is provided with threaded holes so that Figure 4 The threaded mounting screw 53 shown in the figure is matched. Accordingly, the right end of the matching shaft 32 on the left side, the two ends of the main shaft 31, and the left end of the matching shaft 32 on the right side are all provided with the following Figure 5 The “U”-shaped avoidance groove 33 shown is for the installation screw 53 to pass through and realizes the horizontal guiding function of the installation screw 53.

[0047] In addition, such as Figure 6 As shown, as an auxiliary structure, the present invention also includes a connection kit, which includes a petal-type positioning ring 61, a middle adjustment disk 62 and a side adjustment disk 63, which are sequentially sleeved along the axial direction of the small shaft diameter section, and the middle adjustment disk 62 and the side adjustment disk 63 are fastened to each other by an axial screw 64. The outer wall of the middle adjustment disk 62 is a two-stage stepped shaft shape, and the barrel cavity of the side adjustment disk 63 is a two-stage stepped hole shape. When the middle adjustment disk 62 and the side adjustment disk 63 are in contact with each other, the small diameter section of the middle adjustment disk 62 is inserted into the large aperture section of the side adjustment disk 63. The total axial length of the petal-type positioning ring 61, the middle adjustment disk 62 and the side adjustment disk 63 is equal to the distance between the matching shoulders. During installation, the side adjustment disk 63 that matches the left and right mating shafts 32 is installed; the middle adjustment disk 62 that matches the main shaft 31 is installed, and the axial position of the middle adjustment disk 62 on the main shaft 31 is fixed by the petal positioning ring 61; then, the protrusion of the middle adjustment disk 62, i.e., the small diameter section, is inserted into the large aperture section of the side adjustment disk 63, and the middle adjustment disk 62 and the side adjustment disk 63 are fastened by the axial screw 64, so that the left mating shaft 32, the main shaft 31 and the right mating shaft 32 keep the axis coincident and connected as a whole, and installed on the entire device, so as to achieve the purpose of coaxiality control of the mating shaft 32 and the main shaft 31 and achieve the internal protection effect. When the connection kit is used, the length of the avoidance groove 33 needs to be controlled, or the length of the small diameter section is appropriately extended to fully expose the avoidance groove 33.

[0048] For ease of understanding, here, under the premise of adding the above connection kit, take the double-acting seal test as an example, combined with Figure 1-6 The installation test method of the present invention is described as follows:

[0049] S0. Remove the petal positioning ring 61 and the axial screw 64, slide the adjustment plate 62 on the spindle 31, so that the small diameter section leaves the edge adjustment plate 63, exposing the avoidance groove 33;

[0050] S1. Insert the mounting screw 53 into the avoidance groove 33 and screw it into the threaded hole. Slide the mounting screw 53 horizontally to drive the connecting rod 52 to slide, and compress the compression spring 51 at the same time. When the connecting rod 52 overcomes the elastic force of the compression spring 51 and completely leaves the mating shaft 32, rotate the main shaft 31 so that the connecting rod 52 acts on the mating end surface of the mating shaft 32 due to its own anti-rotation structure and the compression spring 51;

[0051] S2. Pull out the positioning pin 92, keep the support body 20 and the bearing support 40 in a loose state, rotate the slewing support seat 90 ninety degrees, then remove the left end cover 22 and the right end cover 23, and install the dynamic ring a and the static ring b;

[0052] S3. After the dynamic ring a and the static ring are installed, reassemble the left end cover 22 and the right end cover 23; keep the support body 20 and the bearing support 40 in a loose state, rotate the swivel support seat 90 in the opposite direction by 90 degrees, and re-insert the positioning pin 92, so as to fix the support body 20 and the swivel support seat 90 on the base 10;

[0053] S4. Rotate the main shaft 31 so that the connecting rod 52 slides out from the end of the main shaft 31 by the elastic force of the compression spring 51 and enters the mounting hole at the mating shaft 32. Then remove the mounting screw 53, reset the connection kit, and start the dynamic seal test.

[0054] S5. After the first round of dynamic seal test is completed, re-execute steps S0-S2 and replace the left seal and the right seal so as to re-perform the next round of testing.

[0055] In step S2, after the swivel support seat 90 rotates ninety degrees, additional pin holes may be arranged to match the positioning pins 100 to achieve the fixing effect of the swivel support seat 90 in this position to improve the stability of the dynamic seal during installation, which will not be elaborated here.

[0056] At this point, the present invention has a simple structure and is easy to install and adjust for sealing testing. The bottom rotating bearing drives the swivel support seat 90, and then the swivel support seat 90 drives the support body 20 and other components to rotate to a position suitable for operation, and then the dynamic seal is disassembled and assembled, and then the swivel support seat 90 is used to reset it, and the subsequent testing process can be carried out; at the same time, the symmetrical disassembly method of the cooperative shaft 32 relative to the main shaft 31 also ensures that the entire process is time-saving and labor-saving, and at the same time, the initial positioning accuracy can be maintained through the swivel support seat 90 and the positioning pin 92, and the effect is remarkable.

[0057] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0059] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A spindle separation dynamic seal testing device, characterized in that: The invention comprises a base (10) and a support body (20) with a built-in sealing main cavity rotatably engaged with the base (10); the support body (20) is arranged horizontally with its axis and is coaxially penetrated by a main shaft (31); the main shaft (31) and at least one end of the support body form a sealing engagement for testing a dynamic seal, and the corresponding end of the support body forming the sealing engagement is an axially detachable structure so as to replace the dynamic seal in due course; both ends of the main shaft (31) extend axially outward, a bearing support (40) coaxial with the main shaft (31) is symmetrically arranged on the base (10), a matching shaft (32) is rotatably engaged with the bearing support (40), and the main shaft (31) is coaxially and detachably mounted on the matching shaft (32); the main shaft (31) or the matching shaft (32) is connected to an external power source; The main shaft (31) is coaxially provided with a matching hole for accommodating a compression spring (51), one end of the compression spring (51) is pressed against the bottom of the matching hole, and the other end of the compression spring (51) extends axially and forms a fixed fit with a connecting rod (52) in the matching hole by sliding anti-rotation fit; a corresponding end of the matching shaft (32) is provided with a mounting hole for the connecting rod (52) to slide axially into and form an anti-rotation fit therewith; The connecting rod (52) is a straight rod body with a cross section in the shape of a spur gear or a semicircular square or triangle; the shapes of the matching holes and the mounting holes match the outer shape of the connecting rod (52).

2. A spindle separation dynamic seal testing device according to claim 1, characterized in that: The adjacent ends of the mating shaft (32) and the main shaft (31) are both provided with avoidance holes for inserting the mounting screws (53). The avoidance holes extend axially and correspondingly penetrate the adjacent end surfaces of the mating shaft (32) and the main shaft (31), thereby forming a U-shaped avoidance groove (33) for guiding the mounting screws (53). The mounting screws (53) are inserted into the connecting rod (52) through the avoidance groove (33) and form a threaded fit with the threaded hole on the connecting rod (52), and can perform axial reciprocating motion along the groove depth direction of the avoidance groove (33).

3. A spindle separation dynamic seal testing device according to claim 2, characterized in that: The adjacent ends of the mating shaft (32) and the main shaft (31) are both provided with small diameter sections with matching shoulders. The device also includes a connection kit, which includes a petal-type positioning ring (61), a middle adjustment disk (62) and a side adjustment disk (63) which are sequentially sleeved along the axial direction of the small diameter section, and the middle adjustment disk (62) and the side adjustment disk (63) are fastened to each other via an axial screw (64). The outer wall of the middle adjustment disk (62) is in the shape of a two-stage stepped shaft, and the cylindrical cavity of the side adjustment disk (63) is in the shape of a two-stage stepped hole. When the middle adjustment disk (62) and the side adjustment disk (63) are in contact with each other, the small diameter section of the middle adjustment disk (62) is inserted into the large diameter section of the side adjustment disk (63). The total axial length of the petal-type positioning ring (61), the middle adjustment disk (62) and the side adjustment disk (63) is equal to the distance between the matching shoulders.

4. A spindle separation dynamic seal testing device according to claim 2 or 3, characterized in that: The support body (20) is cylindrical in shape, comprising a straight sleeve-shaped barrel body (21) and a left end cover (22) and a right end cover (23) forming two end covers of the barrel body (21), and the two end covers are fastened to the corresponding end faces of the barrel body (21) by end screws; both end covers are coaxially penetrated with a through hole for the main shaft (31) to pass through, and the main shaft (31) is rotatably engaged in the through hole through a coaxially sleeved adjusting sleeve (70); a dynamic ring is coaxially mounted on the inner end of the adjusting sleeve (70) located at the sealing main cavity, and a static ring is fixed to the inner end face of the corresponding end cover, and a dynamic seal is formed between the dynamic ring and the static ring.

5. The spindle separation dynamic seal testing device according to claim 4, characterized in that: The inner end of the adjustment sleeve (70) is provided with an outer flange (71) to form a stop for the movable ring to be placed; the inner end surface of the corresponding end cover is concavely provided with an annular groove, and a spring portion for pressing the static ring against the movable ring is sandwiched between the static ring and the bottom of the annular groove.

6. The spindle separation dynamic seal testing device according to claim 5, characterized in that: The outer end of the adjusting sleeve (70) is fixed by a locking ring (80) coaxially threadedly engaged with the main shaft (31).

7. The spindle separation dynamic seal testing device according to claim 4, characterized in that: The bearing on the base (10) is matched with a swivel support seat (90) arranged vertically with a swivel axis; the swivel support seat (90) is provided with a fixed arm (91) extending toward the outer cylinder wall of the support body (20); the swivel support seat (90) and the base (10) are positioned relative to each other via a vertical positioning pin (100).

8. A method for installing and adjusting the spindle separation dynamic seal testing device according to claim 7, characterized in that The following steps are involved: S1. Insert the mounting screw (53) into the avoidance groove (33) and screw it into the threaded hole. Slide the mounting screw (53) horizontally to drive the connecting rod (52) to slide and compress the compression spring (51). When the connecting rod (52) completely leaves the mating shaft (32), rotate the main shaft (31) so that the connecting rod (52) is pressed against the mating end surface of the mating shaft (32) due to its own anti-rotation structure and the action of the compression spring (51). S2. Pull out the positioning pin (100), keep the support body (20) and the bearing support (40) in a loose state, rotate the slewing support seat (90) ninety degrees, then remove the left end cover (22) and / or the right end cover (23), and install the dynamic ring and the static ring; S3. Reinstall the corresponding end caps, keep the support body (20) and the bearing support (40) in a loose state, rotate the swivel support seat (90) in the opposite direction by 90 degrees, and re-insert the positioning pin (100), thereby fixing the support body (20) and the swivel support seat (90) on the base (10); S4. Rotate the main shaft (31) so that the connecting rod (52) slides out from the end of the main shaft (31) by the elastic force of the compression spring (51) and enters the mounting hole at the mating shaft (32). Then remove the mounting screw (53) and start the dynamic seal test.

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