Auxiliary mounting device of mechanical sealing device and using method

Abstract

The invention discloses an auxiliary mounting device of a mechanical sealing device and a using method. The auxiliary mounting device comprises a fixing device and an assembling device. The assembling device comprises a pressing plate, the pressing plate comprises a pressing plate hole, a pressing hole and a downward pressing hole, and a double-end stud is inserted into the downward pressing hole. During application, the transmission shaft and the double-end stud are firstly connected with the fixing device, then the mechanical sealing device is installed on the transmission shaft, then the pressing plate is connected with one end of the transmission shaft and one end of the double-end stud, then the pressing plate moves downwards along the transmission shaft, at the moment, the pressing plate enables the mechanical sealing device to be compressed, and then the mechanical sealing device is installed on the transmission shaft. Then the mechanical sealing device is limited, then the pressing plate is detached, and the mechanical sealing device rebounds to achieve the sealing effect; the acting force of the pressing plate on the mechanical sealing device is uniform, so that the compression performance of the mechanical sealing device is better, the resilience of the mechanical sealing device is uniform, and the sealing effect is better. Therefore, according to the design, the compression performance of the mechanical sealing device is good, and the sealing effect of the mechanical sealing device is good.

Description

Technical Field

[0001] The present invention relates to an auxiliary installation device and a usage method, belonging to the related device field of a water jet propulsion device, and particularly relates to an auxiliary installation device and a usage method for a mechanical seal device. Background Art

[0002] A water jet propulsion device is a special power device that obtains thrust through the reaction force of the water flow ejected by a propulsion water pump. To prevent the backflow of water, the sealing of the transmission shaft in the flow channel is very important, so a mechanical seal device is used to achieve the sealing effect of the transmission shaft.

[0003] Chinese Patent with application number 202322090380.X and application date August 4, 2023 discloses a water jet thruster, which includes a housing. A water suction pipe, a drain port, and a shaft tube communicating with the inner cavity of the housing are provided on the housing. A thrust bearing seat is provided at the end of the shaft tube. An impeller shaft with an impeller installed is arranged in the housing. One end of the impeller shaft is rotatably arranged in a rectifying seat in the housing, and the other end of the impeller shaft passes through the shaft tube and is arranged in the thrust bearing seat. A mechanical seal is arranged in the shaft tube, a snap ring is arranged on the shaft tube, a fixing ring is arranged on the impeller shaft, and the mechanical seal is sleeved on the impeller shaft and limited between the snap ring and the fixing ring. Although this design can install the mechanical seal device through the snap ring when installing the mechanical seal device, it still has the following defects: In this design, when the mechanical seal device is installed and limited by the snap ring, the snap ring provides a reaction force to compress the mechanical seal device. However, during the compression process, the reaction force provided by the snap ring is uneven, so the compression performance of the mechanical seal device is not good, resulting in a poor sealing effect of the mechanical seal device.

[0004] Disclosing the information of this background art section is only intended to increase the overall understanding of the present application, and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The object of the present invention is to overcome the defects and problems in the prior art of poor compression performance of the mechanical seal device, resulting in a poor sealing effect of the mechanical seal device, and to provide an auxiliary installation device and a usage method with better compression performance of the mechanical seal device and better sealing effect of the mechanical seal device.

[0006] To achieve the above object, the technical solution of the present invention is: An auxiliary installation device for a mechanical seal device, the device includes a fixing device and an assembling device; The assembly device includes a pressing plate and a pressing screw. The middle part of the pressing plate is a pressing plate hole, and the middle part of the transmission shaft is inserted into the pressing plate hole. The movement stroke of the pressing plate is to move along the axis direction of the transmission shaft. The bottom of the pressing plate is connected to the top of the mechanical seal device. A pressing hole is provided on the side wall of the pressing plate, and the pressing screw is inserted into the pressing hole. A plurality of downward pressing holes are evenly distributed on the edge of the pressing plate, and one end of a stud is inserted into the downward pressing hole; The other end of the stud is inserted into the stud hole of the fixing device. The middle part of the fixing device is a fixing hole, and one end of the transmission shaft is inserted into the fixing hole. The top of the fixing device is connected to the bottom of the mechanical seal retaining ring. One end of the mechanical seal retaining ring is connected to the outer surface of the mechanical seal device. The inner surface of the mechanical seal device is connected to the outer surface of the mechanical seal shaft sleeve. The inner surface of the mechanical seal shaft sleeve is connected to the outer surface of the transmission shaft.

[0007] The fixing device includes a base, a rolling bearing and a bearing bush. Stud holes are provided on the top edge of the base. The inner surface of the base is connected to the outer surface of the rolling bearing. The inner surface of the rolling bearing is connected to the outer surface of the bearing bush. The middle part of the bearing bush is a fixing hole.

[0008] A downward pressing nut is sleeved on the end of the stud outside the downward pressing hole. A round nut is sleeved on the end of the transmission shaft outside the fixing hole.

[0009] A usage method of an auxiliary installation device for a mechanical seal device, the method includes the following steps: The first step: First insert one end of the transmission shaft into the fixing hole, and then fix the transmission shaft; The second step: First connect the outer surface of the transmission shaft to the inner surface of the mechanical seal shaft sleeve, then connect the outer surface of the mechanical seal device to the mechanical seal retaining ring, and then insert the stud into the stud hole in sequence; The third step: First sleeve the pressing plate hole of the pressing plate on the end of the transmission shaft away from the fixing device. At the same time, insert the stud into the downward pressing hole, and then move the pressing plate along the axis of the transmission shaft towards the direction close to the fixing device until the top of the pressing plate is connected to the top of the mechanical seal device. Then screw the pressing screw into the pressing hole to fix the mechanical seal device and the pressing plate. Then move the pressing plate downward to compress the mechanical seal device from the free height to the minimum height. Then limit the mechanical seal device outside the pressing plate hole. Then screw the pressing screw out of the pressing hole to release the fixation between the mechanical seal device and the pressing plate. Then move the pressing plate away from the fixing device. At the same time, the mechanical seal device rebounds, that is, the preliminary installation process of the mechanical seal device is completed; The fourth step: Then conduct a pump pressure test on the mechanical seal device. If the mechanical seal device passes the pump pressure test, the installation of the mechanical seal device is completed.

[0010] In the fourth step, the pump pressure test includes a static pump pressure test and a dynamic pump pressure test.

[0011] In the fourth step, for the static pump pressure test, first install a seal seat on the top of the mechanical seal retaining ring, then install a gland on the top of the seal seat, then install a drive shaft sleeve between the gland and the drive shaft, then fix the drive shaft sleeve, then move the gland downward to compress the mechanical seal device to the static height, and then conduct a pump pressure from the pump pressure port of the seal seat into its interior to perform the static pump pressure test.

[0012] In the fourth step, a top sealing ring is provided on the top of the seal seat, a bottom sealing ring is provided on the bottom of the seal seat, and a lip seal is provided at one end of the gland close to the drive shaft sleeve.

[0013] In the fourth step, the static height is 55.5 mm to 56.5 mm.

[0014] In the fourth step, for the dynamic pump pressure test, first adjust the position of the gland so that the distance between the mechanical seal shaft sleeve and the mechanical seal retaining ring is the test distance, and then rotate the drive shaft to conduct the dynamic pump pressure test.

[0015] In the fourth step, the test distance is 1.8 to 2.2 mm.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the auxiliary installation device and usage method of a mechanical seal device of the present invention, the device includes a fixing device and an assembling device. The assembling device includes a pressing plate and a pressing screw. A drive shaft is inserted in the middle of the pressing plate. A mechanical seal shaft sleeve, a mechanical seal device, and a mechanical seal retaining ring are sequentially sleeved outside the drive shaft. Pressing holes are evenly distributed on the pressing plate. One end of a stud is inserted into the pressing hole. The bottom of the pressing plate is connected to the top of the mechanical seal device. The other end of the stud is inserted into the fixing device. The other end of the drive shaft is inserted into the fixing device. During application, first fix the drive shaft to the fixing device, then sequentially install the mechanical seal shaft sleeve, the mechanical seal device, and the mechanical seal retaining ring on the drive shaft, then insert the stud into the stud hole, then connect the pressing plate corresponding to the drive shaft and the stud, then make the pressing plate descend along the drive shaft. After the pressing plate is connected to the mechanical seal device, screw in the pressing screw on the pressing plate to fix the pressing plate and the mechanical seal device, then make the pressing plate continue to descend until the mechanical seal device is compressed to the minimum height, then install the split ring to limit the mechanical seal device, and then remove the pressing screw and the pressing plate. At this time, the mechanical seal device rebounds to be connected to the split ring to complete the installation of the mechanical seal device. The advantages of the present invention also include: First point: The bottom of the pressing plate is a planar structure. Therefore, when the pressing plate moves downward to compress the mechanical seal device, the force on the top of the mechanical seal device is uniform, that is, the compression force on the spring in the mechanical seal device is uniform. So, the compression performance of the mechanical seal device is good. After removing the pressing plate, the elastic force generated when the spring rebounds is uniform. Therefore, the top of the mechanical seal device can generate sufficient pressing force under the action of the elastic force, and the sealing effect of the mechanical seal device is good. Second point: One end of the stud is inserted into the fixing device for fixation, and the other end of the stud is inserted into the pressing plate to provide guidance during the process of the pressing plate descending along the transmission shaft, preventing the pressing plate from skewing and ensuring that the pressing plate is perpendicular to all the studs during its descent. Therefore, the bottom of the pressing plate is parallel to the top of the mechanical seal device, thus generating a uniform downward pressure. Therefore, the present invention has good compression performance for the mechanical seal device and good sealing effect for the mechanical seal device.

[0017] 2. In the auxiliary installation device and usage method of a mechanical seal device of the present invention, the fixing device includes a base, a rolling bearing and a bearing bush. A pressing nut is sleeved on the end of the stud located outside the pressing plate, and a round nut is sleeved on the end of the transmission shaft located outside the fixing device. During application, the transmission shaft is fixed by the round nut. When the pressing plate moves downward along the transmission shaft, all the pressing nuts are simultaneously screwed. The pressing nut and the stud are in threaded connection, so the pressing nut gradually descends along the stud, and then the pressing nut drives the pressing plate to gradually move downward along the transmission shaft. When screwing the pressing nut, the moving distance of the pressing nut can be precisely controlled, thereby accurately controlling the compression distance of the mechanical seal device. Therefore, the present invention has good control effect during the compression of the mechanical seal device.

[0018] 3. In the auxiliary installation device and usage method of a mechanical seal device of the present invention, after installing the mechanical seal device, static pump pressure test and dynamic pump pressure test are carried out on the mechanical seal device. During the static pump pressure test, first install the seal seat, gland, transmission shaft sleeve and related sealing devices, then compress the mechanical seal device to the static height through the gland, and then pump pressure into its interior from the pump pressure port of the seal seat for the static pump pressure test. During application, the mechanical seal device is in contact with the water flow ejected by the water pump, so the pump pressure test for the mechanical seal device is very important. At this time, the pump pressure process is advanced to verify the installation effect of the mechanical seal device in advance and avoid insufficient time for remedy when problems are found later. Therefore, the present invention has good test effect for the mechanical seal device.

[0019] 4. In the auxiliary installation device and usage method of a mechanical seal device according to the present invention, in the fourth step, after the static pump pressure test is performed, the position of the gland is adjusted so that the test spacing is formed between the mechanical seal shaft sleeve and the mechanical seal retaining ring, and then the transmission shaft is rotated to perform the dynamic pump pressure test. Without replacing parts, only by adjusting the position of the gland, the dynamic pump pressure test of the mechanical seal device can be carried out. Therefore, the test efficiency is relatively high. Thus, the test efficiency of the present invention is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural view of the present invention.

[0021] Figure 2 is a schematic structural view of the free height in Embodiment 1.

[0022] Figure 3 is Figure 1 the top view of

[0023] Figure 4 is Figure 1 the schematic structural view of the assembly device in

[0024] Figure 5 is Figure 1 the schematic structural view of the fixing device in

[0025] Figure 6 is a schematic structural view of Embodiment 3.

[0026] Figure 7 is Figure 6 the schematic structural view of the gland in

[0027] Figure 8 is a schematic structural view of Embodiment 4.

[0028] Figure 9 is Figure 8 the schematic structural view of the test spacing in

[0029] Figure 10 is Figure 8 the schematic structural view of the lip seal in

[0030] Figure 11 is Figure 8 the top view of

[0031] In the figure: fixing device 1, stud hole 11, fixing hole 12, base 13, rolling bearing 14, bearing bushing 15, assembly device 2, pressing plate 21, pressing plate hole 211, pressing hole 212, downward pressing hole 213, pressing screw 22, stud 23, downward pressing nut 231, transmission shaft 3, mechanical seal device 31, free height 311, minimum height 312, static height 313, mechanical seal retaining ring 32, test spacing 321, mechanical seal shaft sleeve 33, round nut 34, split ring installation position 35, seal seat 4, pump pressure port 41, top sealing ring 42, bottom sealing ring 43, water flow pump pressure direction 44, gland 5, transmission shaft sleeve 51, lip seal 52, tooling sealing ring 53, gland O-ring 54. Specific embodiments

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Please refer to Figure 1 — Figure 11 , an auxiliary installation device for a mechanical seal device, the device comprising a fixing device 1 and an assembly device 2; The assembly device 2 includes a pressing plate 21 and a pressing screw 22. The middle part of the pressing plate 21 is a pressing plate hole 211. The middle part of the transmission shaft 3 is inserted into the pressing plate hole 211. The movement stroke of the pressing plate 21 is to move along the axis direction of the transmission shaft 3. The bottom of the pressing plate 21 is connected to the top of the mechanical seal device 31. Pressing holes 212 are provided on the side wall of the pressing plate 21. The pressing screw 22 is inserted into the pressing holes 212. A plurality of downward pressing holes 213 are evenly distributed on the edge of the pressing plate 21. One end of the stud 23 is inserted into the downward pressing holes 213; The other end of the stud 23 is inserted into the stud hole 11 of the fixing device 1. The middle part of the fixing device 1 is a fixing hole 12. One end of the transmission shaft 3 is inserted into the fixing hole 12. The top of the fixing device 1 is connected to the bottom of the mechanical seal retaining ring 32. One end of the mechanical seal retaining ring 32 is connected to the outer surface of the mechanical seal device 31. The inner surface of the mechanical seal device 31 is connected to the outer surface of the mechanical seal shaft sleeve 33. The inner surface of the mechanical seal shaft sleeve 33 is connected to the outer surface of the transmission shaft 3.

[0034] The fixing device 1 includes a base 13, a rolling bearing 14 and a bearing bushing 15. Stud holes 11 are provided on the top edge of the base 13. The inner surface of the base 13 is connected to the outer surface of the rolling bearing 14. The inner surface of the rolling bearing 14 is connected to the outer surface of the bearing bushing 15. The middle part of the bearing bushing 15 is a fixing hole 12.

[0035] A pressing nut 231 is sleeved on one end of the stud 23 located outside the pressing hole 213, and a round nut 34 is sleeved on one end of the transmission shaft 3 located outside the fixing hole 12.

[0036] A method for using an auxiliary installation device of a mechanical seal device, the method comprising the following steps: First step: First insert one end of the transmission shaft 3 into the fixing hole 12, and then fix the transmission shaft 3. Second step: First connect the outer surface of the transmission shaft 3 with the inner surface of the mechanical seal shaft sleeve 33, then connect the outer surface of the mechanical seal device 31 with the mechanical seal retaining ring 32, and then insert the stud 23 into the stud hole 11 in sequence. Third step: First sleeve the pressing hole 211 of the pressing plate 21 on one end of the transmission shaft 3 far from the fixing device 1. At the same time, insert the stud 23 into the pressing hole 213, and then move the pressing plate 21 along the axis of the transmission shaft 3 towards the direction close to the fixing device 1 until the top of the pressing plate 21 is connected to the top of the mechanical seal device 31. Then screw the pressing screw 22 into the pressing hole 212 to fix the mechanical seal device 31 and the pressing plate 21. Then move the pressing plate 21 downward to compress the mechanical seal device 31 from the free height 311 to the minimum height 312. Then limit the mechanical seal device 31 outside the pressing hole 211, and then screw the pressing screw 22 out of the pressing hole 212 to release the fixation between the mechanical seal device 31 and the pressing plate 21. Then move the pressing plate 21 away from the fixing device 1. At the same time, the mechanical seal device 31 rebounds, and the preliminary installation process of the mechanical seal device 31 is completed. Fourth step: Then perform a pump pressure test on the mechanical seal device 31. If the mechanical seal device 31 passes the pump pressure test, the installation of the mechanical seal device 31 is completed.

[0037] In the fourth step, the pump pressure test is a static pump pressure test and a dynamic pump pressure test.

[0038] In the fourth step, for the static pump pressure test, first install a seal seat 4 on the top of the mechanical seal retaining ring 32, then install a gland 5 on the top of the seal seat 4, then install a transmission shaft sleeve 51 between the gland 5 and the transmission shaft 3, then fix the transmission shaft sleeve 51, and then move the gland 5 downward to compress the mechanical seal device 31 to the static height 313. Then pump pressure into the seal seat 4 from the pump pressure port 41 of the seal seat 4 for the static pump pressure test.

[0039] In the fourth step, a top sealing ring 42 is arranged on the top of the seal seat 4, a bottom sealing ring 43 is arranged on the bottom of the seal seat 4, and a lip seal 52 is arranged at one end of the gland 5 close to the transmission shaft sleeve 51.

[0040] In the fourth step, the static height 313 is from fifty-five point five millimeters to fifty-six point five millimeters.

[0041] In the fourth step, for the dynamic pump pressure test, first adjust the position of the gland 5 so that the distance between the mechanical seal shaft sleeve 33 and the mechanical seal retaining ring 32 is the test distance 321, and then rotate the transmission shaft 3 to conduct the dynamic pump pressure test.

[0042] In the fourth step, the test distance 321 is from one point eight to two point two millimeters.

[0043] The supplementary description of the present invention is as follows: The mechanical seal device 31 described in the present invention refers to a device for sealing the transmission shaft 3 to prevent the liquid in the flow channel from contacting the transmission shaft 3; the mechanical seal device 31 is externally sleeved with a mechanical seal shaft sleeve 33, and the mechanical seal shaft sleeve 33 protects the mechanical seal device 31 and at the same time ensures the reliability and stability of the seal; the outside of the mechanical seal shaft sleeve 33 is sleeved with a mechanical seal retaining ring 32, and the mechanical seal retaining ring 32 is used for limiting and protecting the mechanical seal shaft sleeve 33 and the mechanical seal device 31 and improving the operation stability of the two.

[0044] Embodiment 1: Please refer to Figure 1 — Figure 11 A mechanical seal device auxiliary installation device, the device includes a fixing device 1 and an assembling device 2; the assembling device 2 includes a pressing plate 21 and a pressing screw 22, the middle of the pressing plate 21 is a pressing plate hole 211, the middle part of the transmission shaft 3 is inserted into the pressing plate hole 211, the movement stroke of the pressing plate 21 is to move along the axis direction of the transmission shaft 3, the bottom of the pressing plate 21 is connected to the top of the mechanical seal device 31, a pressing hole 212 is arranged on the side wall of the pressing plate 21, the pressing screw 22 is inserted into the pressing hole 212, a plurality of downward pressing holes 213 are evenly distributed on the edge of the pressing plate 21, and one end of a stud 23 is inserted into the downward pressing hole 213; the other end of the stud 23 is inserted into the stud hole 11 of the fixing device 1, the middle of the fixing device 1 is a fixing hole 12, one end of the transmission shaft 3 is inserted into the fixing hole 12, the top of the fixing device 1 is connected to the bottom of the mechanical seal retaining ring 32, one end of the mechanical seal retaining ring 32 is connected to the outer surface of the mechanical seal device 31, the inner surface of the mechanical seal device 31 is connected to the outer surface of the mechanical seal shaft sleeve 33, and the inner surface of the mechanical seal shaft sleeve 33 is connected to the outer surface of the transmission shaft 3.

[0045] A method for using a mechanical seal device auxiliary installation device, the method includes the following steps: The first step: First insert one end of the transmission shaft 3 into the fixing hole 12, and then fix the transmission shaft 3; Step 2: First, connect the outer surface of the transmission shaft 3 to the inner surface of the mechanical seal shaft sleeve 33, then connect the outer surface of the mechanical seal device 31 to the mechanical seal retaining ring 32, and then insert the stud 23 into the stud hole 11 in sequence; Step 3: First, fit the pressing plate hole 211 of the pressing plate 21 over one end of the transmission shaft 3 away from the fixing device 1. At the same time, insert the stud 23 into the downward pressing hole 213. Then, move the pressing plate 21 along the axis of the transmission shaft 3 towards the fixing device 1 until the top of the pressing plate 21 is connected to the top of the mechanical seal device 31. Then, screw the pressing screw 22 into the pressing hole 212 to fix the mechanical seal device 31 to the pressing plate 21. Next, move the pressing plate 21 downward to compress the mechanical seal device 31 from the free height 311 to the minimum height 312. Then, limit the mechanical seal device 31 outside the pressing plate hole 211. Then, unscrew the pressing screw 22 from the pressing hole 212 to release the fixation between the mechanical seal device 31 and the pressing plate 21. Then, move the pressing plate 21 away from the fixing device 1. At the same time, the mechanical seal device 31 rebounds, thus completing the preliminary installation process of the mechanical seal device 31; Step 4: Then, conduct a pump pressure test on the mechanical seal device 31. The completion of the pump pressure test of the mechanical seal device 31 indicates the completion of the installation of the mechanical seal device 31.

[0046] Preferably, in the third step, the minimum height 312 is 51.5 to 52.5 millimeters.

[0047] Preferably, in the third step, the minimum height 312 is 52 millimeters.

[0048] Preferably, in the third step, the limiting of the mechanical seal device 31 outside the pressing plate hole 211 is to install a split ring at the split ring installation position 35 to limit the mechanical seal device 31.

[0049] Embodiment 2: The basic content is the same as that of Embodiment 1, and the differences are as follows: Please refer to Figure 1 — Figure 5 , the fixing device 1 includes a base 13, a rolling bearing 14 and a bearing bush 15. A stud hole 11 is provided on the top edge of the base 13. The inner surface of the base 13 is connected to the outer surface of the rolling bearing 14. The inner surface of the rolling bearing 14 is connected to the outer surface of the bearing bush 15. The middle part of the bearing bush 15 is a fixing hole 12. A downward pressing nut 231 is sleeved on one end of the stud 23 outside the downward pressing hole 213. A round nut 34 is sleeved on one end of the transmission shaft 3 outside the fixing hole 12.

[0050] During application, first connect the inner surface of the rolling bearing 14 to the outer surface of the bearing bushing 15, then connect the outer surface of the rolling bearing 14 to the inner surface of the base 13. Then insert one end of the transmission shaft 3 into the fixing hole 12 in the middle of the bearing bushing 15, and then screw on the round nut 34 on the end of the transmission shaft 3 outside the fixing hole 12, thus completing the connection of the transmission shaft 3 to the fixing device; the bearing bushing 15 protects the transmission shaft 3 to prevent damage to the outer surface of the transmission shaft 3. Since the transmission shaft 3 drives the bearing bushing 15 to rotate together during operation, the rolling bearing 14 is used to connect the bearing bushing 15 and the base 13; when it is necessary to move the pressing plate 21 downward, first screw the pressing nuts 231 on the ends of all the stud bolts 23 outside the downward pressing holes 231 at the same time, and then all the pressing nuts 231 drive the pressing plate 21 to move downward. Then the pressing plate 21 moves downward to compress the mechanical seal device 31 from the free height 311 to the minimum height 312. During this process, when screwing the pressing nuts 231, the effect of the stable downward movement of the pressing plate 21 is achieved, and the pressing nuts 231 also limit the pressing plate 21 to prevent the pressing plate 21 from moving upward under the elastic force of the mechanical seal device 31; when screwing the pressing nuts 231, the effect of fine-tuning the position of the pressing nuts 231 can be achieved, thereby achieving the effect of fine-tuning the position of the pressing plate 21, so the compression effect of the mechanical seal device 31 can be fine-tuned.

[0051] Embodiment 3: The basic content is the same as that of Embodiment 1, and the differences are as follows: Please refer to Figure 1 — Figure 10 In the fourth step, the pump pressure test is a static pump pressure test and a dynamic pump pressure test. In the fourth step, for the static pump pressure test, first install the seal seat 4 on the top of the mechanical seal retaining ring 32, then install the gland 5 on the top of the seal seat 4, then install the transmission shaft sleeve 51 between the gland 5 and the transmission shaft 3, then fix the transmission shaft sleeve 51, and then move the gland 5 downward to compress the mechanical seal device 31 to the static height 313, and then pump pressure into the seal seat 4 from the pump pressure port 41 of the seal seat 4 for the static pump pressure test. In the fourth step, a top sealing ring 42 is provided on the top of the seal seat 4, a bottom sealing ring 43 is provided on the bottom of the seal seat 4, and a lip seal 52 is provided at one end of the gland 5 close to the transmission shaft sleeve 51. In the fourth step, the static height 313 is 55.5 mm to 56.5 mm. Preferably, in the fourth step, the static height is 56 mm.

[0052] During application, first install the seal seat 4 on the top of the mechanical seal retaining ring 32, then install the gland 5 on the top of the seal seat 4, and then install the transmission shaft sleeve 51 between the gland 5 and the transmission shaft 3, so that the inner surface of the transmission shaft sleeve 51 is connected to the outer surface of the transmission shaft 3. Then screw the lower compression nut 231 onto one end of the stud 23 located outside the gland 5, and then screw all the lower compression nuts 231. Then, the lower compression nuts 231 move downward to drive the gland 5 to move downward. Then, the gland 5 moves downward to compress the mechanical seal device 31 to the static height 313. Then, pump pressure is applied to the inside of the seal seat 4 from the pump pressure port 41 of the seal seat 4 to conduct a static pump pressure test. If the sealing performance of the mechanical seal device 31 is good, it passes the static pump pressure test. During the above process, the bottom sealing ring 43 seals the end face between the seal seat 4 and the mechanical seal retaining ring 32, the top sealing ring 42 seals the end face between the seal seat 4 and the gland 5, and the tooling sealing ring 53 and the gland O-ring seal the end face where the gland 5 is connected to the transmission shaft sleeve 51. Therefore, a sealing environment that meets the static pump pressure test is achieved to conduct the static pump pressure test on the mechanical seal device 31.

[0053] Embodiment 4: The basic content is the same as that of Embodiment 1, and the difference lies in: Please refer to Figure 1 — Figure 11 In the fourth step, during the dynamic pump pressure test, first adjust the position of the gland 5 so that the distance between the mechanical seal shaft sleeve 33 and the mechanical seal retaining ring 32 is the test distance 321, and then rotate the transmission shaft 3 to conduct the dynamic pump pressure test. In the fourth step, the test distance 321 is 1.8 to 2.2 millimeters. Preferably, in the fourth step, the test distance 321 is 2 millimeters.

[0054] During application, first screw all the lower compression nuts 231 to make the lower compression nuts 231 move upward. At this time, a gap appears between the lower compression nuts 231 and the gland 5. Therefore, the gland 5 can move upward. Then, the gland 5 drives the seal seat 4 to move upward, and then the seal seat 4 drives the mechanical seal retaining ring 32 to move upward. Therefore, a gap appears between the mechanical seal shaft sleeve 33 and the mechanical seal retaining ring 32. Adjust the distance between the mechanical seal shaft sleeve 33 and the mechanical seal retaining ring 32 until the distance is the test distance 321. The test distance 321 provides a rotating space for the transmission shaft 3 and the mechanical seal shaft sleeve 33. Then, rotate the transmission shaft 3 to drive the mechanical seal shaft sleeve 33 to rotate simultaneously to conduct the dynamic pump pressure test on the mechanical seal device 31.

[0055] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. Any equivalent modification or change made by those of ordinary skill in the art according to the content disclosed in the present invention shall be included in the protection scope recorded in the claims.

Claims

1. An auxiliary installation device for a mechanical sealing device, characterized in that: The device comprises a fixing device (1) and an assembly device (2); The assembly device (2) comprises a pressure plate (21) and a clamping screw (22); the middle part of the pressure plate (21) is a pressure plate hole (211), the middle part of the transmission shaft (3) is inserted into the pressure plate hole (211), the movement stroke of the pressure plate (21) is to move along the axial direction of the transmission shaft (3), the bottom of the pressure plate (21) is connected to the top of the mechanical sealing device (31), the side wall of the pressure plate (21) is provided with a clamping hole (212), the clamping screw (22) is inserted into the clamping hole (212), and a plurality of lower pressure holes (213) are evenly distributed on the edge of the pressure plate (21), and one end of a stud (23) is inserted into the lower pressure hole (213); The other end of the stud bolt (23) is inserted into the stud bolt hole (11) of the fixing device (1); the middle portion of the fixing device (1) is a fixing hole (12); one end of the transmission shaft (3) is inserted into the fixing hole (12); the top of the fixing device (1) is connected to the bottom of the mechanical seal retaining ring (32); one end of the mechanical seal retaining ring (32) is connected to the outer surface of the mechanical seal device (31); the inner surface of the mechanical seal device (31) is connected to the outer surface of the mechanical seal sleeve (33); and the inner surface of the mechanical seal sleeve (33) is connected to the outer surface of the transmission shaft (3).

2. The auxiliary installation device of a mechanical seal device according to claim 1, characterized in that: The fixing device (1) comprises a base (13), a rolling bearing (14) and a bearing bushing (15); a stud hole (11) is provided on the top edge of the base (13); the inner surface of the base (13) is connected to the outer surface of the rolling bearing (14); the inner surface of the rolling bearing (14) is connected to the outer surface of the bearing bushing (15); and the middle of the bearing bushing (15) is a fixing hole (12).

3. The auxiliary installation device of a mechanical seal device according to claim 2, characterized in that: A pressing nut (231) is sleeved on one end of the stud bolt (23) located outside the pressing hole (213), and a round nut (34) is sleeved on one end of the transmission shaft (3) located outside the fixing hole (12).

4. A method for using the auxiliary installation device of the mechanical seal device according to claim 1, characterized in that: The method comprises the following steps: Step 1: first insert one end of the transmission shaft (3) into the fixing hole (12), and then fix the transmission shaft (3); Step 2: firstly connect the outer surface of the transmission shaft (3) to the inner surface of the mechanical seal sleeve (33), then connect the outer surface of the mechanical seal device (31) to the mechanical seal retaining ring (32), and then insert the studs (23) into the stud holes (11) in sequence; Step 3: First, put the pressing plate hole (211) of the pressing plate (21) on the end of the transmission shaft (3) away from the fixing device (1), and at the same time, insert the stud (23) into the lower pressing hole (213), and then move the pressing plate (21) along the axis of the transmission shaft (3) toward the fixing device (1) until the top of the pressing plate (21) is connected to the top of the mechanical sealing device (31), and then screw the clamping screw (22) into the clamping hole (212) to fix the mechanical sealing device (31) and the pressing plate (21), and then make the pressing plate (21) 1) moving downward to compress the mechanical seal device (31) from a free height (311) to a minimum height (312), then limiting the mechanical seal device (31) outside the pressure plate hole (211), then unscrewing the clamping screw (22) from the clamping hole (212) to release the fixation between the mechanical seal device (31) and the pressure plate (21), then moving the pressure plate (21) away from the fixing device (1), and at the same time, the mechanical seal device (31) rebounds, thus completing the preliminary installation process of the mechanical seal device (31); Step 4: Perform a pump pressure test on the mechanical seal device (31). If the mechanical seal device (31) passes the pump pressure test, the installation of the mechanical seal device (31) is completed.

5. The method for using the auxiliary installation device of a mechanical seal device according to claim 4, characterized in that: In the fourth step, the pump pressure test is a static pump pressure test and a dynamic pump pressure test.

6. The method for using the auxiliary installation device of a mechanical seal device according to claim 5, characterized in that: In the fourth step, the static pump pressure test is to first install the sealing seat (4) on the top of the mechanical seal retaining ring (32), then install the pressure cover (5) on the top of the sealing seat (4), then install the drive shaft sleeve (51) between the pressure cover (5) and the drive shaft (3), then fix the drive shaft sleeve (51), and then move the pressure cover (5) downward to compress the mechanical seal device (31) to a static height (313), and then pump pressure is applied from the pump pressure port (41) of the sealing seat (4) to the inside thereof to perform a static pump pressure test.

7. The method for using the auxiliary installation device of a mechanical seal device according to claim 6, characterized in that: In the fourth step, a top sealing ring (42) is provided at the top of the sealing seat (4), a bottom sealing ring (43) is provided at the bottom of the sealing seat (4), and a lip seal (52) is provided at one end of the gland (5) close to the transmission shaft sleeve (51).

8. The method for using the auxiliary installation device of a mechanical seal device according to claim 7, characterized in that: In the fourth step, the static height (313) is fifty-five point five millimeters to fifty-six point five millimeters.

9. The method for using the auxiliary installation device of a mechanical seal device according to claim 5, characterized in that: In the fourth step, the dynamic pump pressure test is to first adjust the position of the gland (5) so that the spacing between the mechanical seal sleeve (33) and the mechanical seal retaining ring (32) is the test spacing (321), and then rotate the transmission shaft (3) to perform the dynamic pump pressure test.

10. The method for using the auxiliary installation device of a mechanical seal device according to claim 9, characterized in that: In the fourth step, the test spacing (321) is 1.8 to 2.2 millimeters.

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