Tool for testing mechanical sealing performance

Abstract

The invention relates to a tool for testing mechanical sealing performance. The tool comprises a main shaft, the bearing module comprises a bearing box and a bearing cover which are in sealed connection with each other, and a cavity wrapping part of the main shaft is formed in the bearing box and the bearing cover; the mechanical sealing module is arranged on the outer wall of the section, penetrating through the cavity, of the main shaft; the adjusting ring structurally comprises a core shaft and an outer ring which are connected with each other, and the core shaft and the main shaft are connected and rotate synchronously; the sealing test module comprises a sealing tank which is connected to the end part of the bearing box in a sealing manner, the sealing tank is connected with an adjusting screw which is located on the same axis with the main shaft, and the adjusting screw abuts against the adjusting ring and spirally controls the adjusting ring to axially move along the cavity; and an environment simulation module. The device is compact and reasonable in structure and convenient to operate, the actual working conditions of short-time operation in a high-temperature air environment and long-time operation in a high-pressure deepwater environment can be effectively simulated, and the performance and the service life of the mechanical sealing module under different environment conditions are evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of ship sealing, and in particular to a tooling for testing the mechanical seal performance. Background Art

[0002] The shaft-end mechanical seal device of a ship refers to a device that prevents fluid leakage, which is composed of at least a pair of end faces perpendicular to the rotation axis. Under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, and with the cooperation of auxiliary seals, this pair of end faces remain in contact and relatively slide. Due to its many advantages such as reliable sealing, no wear on the shaft, low consumption, and good vibration resistance, mechanical seals are widely used in various fields such as ships, chemical industries, and machinery. However, the performance of mechanical seals is closely related to the application environment, and the requirements for mechanical seals vary significantly in different environments. For example, some scenarios require short-term operation in a high-temperature air environment, while some require long-term operation in a high-pressure deep-water environment. These different application environments pose different challenges to the performance of mechanical seals.

[0003] In a high-temperature air environment, mechanical seals face problems such as damage to the sealing surface caused by high temperature and degradation of lubricant performance. The high-temperature environment may cause material degradation of the sealing surface, thereby affecting the stability and reliability of the seal. In addition, high temperature may also cause uneven thermal expansion between the sealing rings, affecting the fit of the sealing surface and thus leading to leakage. Therefore, mechanical seals for short-term operation in a high-temperature air environment need to have good high-temperature resistance and stable sealing ability.

[0004] In a high-pressure deep-water environment, mechanical seals face more severe challenges. Under high-pressure conditions, the hydrostatic pressure of the fluid is extremely high, which may cause deformation or damage to the sealing surface, thereby triggering leakage. In addition, long-term operation in a deep-water environment requires mechanical seals to have extremely high durability and stability. Long-term operation may cause the sealing surface to wear due to repeated friction, thereby affecting the sealing performance. Therefore, mechanical seals for long-term operation in a high-pressure deep-water environment need to have extremely high pressure resistance, anti-wear ability, and stable sealing performance.

[0005] However, there is currently no relatively effective means for evaluating the performance of mechanical seals in specific environments. In the applications of mechanical seals for short-term operation in a high-temperature air environment and long-term operation in a high-pressure deep-water environment, there is a lack of a test method that can truly simulate these specific environmental conditions. Existing test methods often cannot simultaneously meet the simulation requirements for various extreme conditions such as high temperature, high pressure, and long-term operation, resulting in the inability to ensure the reliability of mechanical seals in actual applications.

[0006] In addition, the elastic force between the dynamic ring and the static ring of the mechanical seal is a key factor affecting the performance and service life of the mechanical seal. The magnitude of the elastic force directly affects the contact pressure and frictional force of the sealing surface, thereby affecting the sealing effect and the wear condition of the sealing surface. However, the existing testing methods usually cannot achieve the dynamic adjustment of the elastic force between the dynamic ring and the static ring, resulting in the inability to accurately evaluate the influence of different elastic forces on the performance of the mechanical seal during the testing process. This limitation makes the performance evaluation of the mechanical seal under specific environments lack a scientific basis and unable to provide reliable technical support for practical applications.

[0007] Therefore, we propose a tooling for testing the performance of mechanical seals. Summary of the Invention

[0008] The applicant provides a tooling for testing the performance of mechanical seals to effectively simulate the actual working conditions of short-term operation in a high-temperature air environment and long-term operation in a high-pressure deep-water environment, and evaluate the performance and service life of the mechanical seal module under different environmental conditions. The tooling simulates high temperature and high pressure environments through an electric heating device and a booster pump, and dynamically adjusts the elastic force between the dynamic ring and the static ring of the mechanical seal module through an adjusting ring and an adjusting screw to optimize the sealing performance.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A tooling for testing the performance of mechanical seals, comprising:

[0011] A main shaft, which is connected to a driving module and realizes rotation;

[0012] A bearing module, which includes a bearing housing and a bearing cover that are hermetically connected to each other, and a cavity covering a part of the main shaft is provided in the bearing housing and the bearing cover;

[0013] A mechanical seal module, which is arranged on the outer wall of a section of the main shaft passing through the cavity;

[0014] An adjusting ring, the structure of which includes a mandrel and an outer ring that are connected to each other. The mandrel is connected to the main shaft and rotates synchronously, and the outer ring is buckled on the main shaft and contacts the mechanical seal module;

[0015] A seal test module, which includes a seal tank hermetically connected to the end of the bearing housing, and an adjusting screw connected to the seal tank and on the same axis as the main shaft. The adjusting screw abuts against the adjusting ring and controls the axial movement of the adjusting ring along the cavity through threads;

[0016] An environment simulation module, which includes a liquid interface provided on the seal tank and an electric heating device provided on the bearing housing, and is used to simulate a high-temperature or high-pressure deep-water environment.

[0017] In one embodiment, it further includes a monitoring module, which includes a pressure gauge, a temperature gun, and an observation hole on the bearing housing, and is used to monitor the temperature, pressure, and leakage amount of the sealing area in real time.

[0018] In one embodiment, the bearing housing is fixedly arranged through a bearing bracket, and a columnar cavity is arranged inside the bearing housing. A stepped installation mechanical seal module stationary ring, a rotary shaft lip seal, and a bearing are sequentially arranged in the columnar cavity from left to right.

[0019] In one embodiment, the bearing cover is hermetically connected to the bearing housing, and a perforation for the main shaft to pass through is opened on the bearing cover. A stepped installation bearing and a rotary shaft lip seal are sequentially arranged inside the perforation from left to right;

[0020] An adjusting ring is arranged at the other end of the bearing housing and is docked with the main shaft. The adjusting ring is an annular end.

[0021] In one embodiment, at least one threaded hole communicating with the columnar cavity is arranged at the upper end of the bearing housing, and a water flow hole communicating with the columnar cavity is arranged at the lower end of the bearing housing. The water flow hole is located in the area between the stationary seal ring and the rotary shaft lip seal. A threaded hole communicating with the perforation is opened at the upper end of the bearing cover.

[0022] In one embodiment, the main shaft is a cylindrical rotating body. The main shaft is connected to the motor through a coupling, and the motor is fixedly arranged through a motor bracket. A round hole with a square keyway is arranged at one end of the main shaft and is docked with the adjusting ring for synchronous rotation. A bearing installation step, a lock washer, and a lock nut for cooperating with the bearing end cover are also arranged on the main shaft.

[0023] In one embodiment, the seal tank is of a cylindrical structure. The seal tank is connected to the bearing housing through a flange and screws, and a threaded hole corresponding to the adjusting screw and an O-ring seal groove are arranged on the seal tank. An interface for connecting a control valve, a booster pump, and a pressure gauge is also arranged on the seal tank.

[0024] In one embodiment, the mechanical seal module includes a dynamic ring and a stationary ring. The stationary ring is installed on the bearing housing, the dynamic ring is installed on the side close to the adjusting ring, and the elastic force between the dynamic ring and the stationary ring is dynamically controlled by the axial movement of the adjusting ring.

[0025] In one embodiment, it further includes a lubrication and sealing module, which includes threaded holes and plugs arranged on the bearing housing and the bearing cover for replenishing lubricating oil.

[0026] In one embodiment, the leakage amount in the monitoring module is calculated by the flow rate of the water flow hole below the bearing housing, and the sealing performance is evaluated by combining the data of the pressure gauge and the temperature gun.

[0027] The beneficial effects of the present invention are as follows:

[0028] The present invention has a compact and reasonable structure and is easy to operate. It can effectively simulate the actual working conditions of short-term operation in a high-temperature air environment and long-term operation in a high-pressure deep-water environment, and evaluate the performance and life of the mechanical sealing module under different environmental conditions. The tooling simulates high temperature and high-pressure environments through an electric heating device and a booster water pump, and dynamically adjusts the elastic force between the dynamic ring and the static ring of the mechanical sealing module through an adjusting ring and an adjusting screw to optimize the sealing performance. At the same time, the tooling is also equipped with monitoring modules such as a temperature measuring gun, a pressure gauge, an observation hole, and a water flow hole, which can monitor the temperature, pressure, and leakage of the sealing area in real time to ensure the accuracy and reliability of the test results. The tooling of the present invention has a modular design and a simple replacement function, can adapt to different testing needs, and provide a practical evaluation method, providing reliable technical support for the practical application of mechanical sealing modules in specific environments.

[0029] At the same time, the present invention also has the following advantages:

[0030] The mechanical seal performance test tool provided by the present invention can effectively simulate the short-term operating conditions in a high-temperature air environment, and ensure the stability and reliability of the mechanical seal module in a high-temperature environment. Through the setting of the electric heating device, the tool can heat the bearing box to the actual temperature in the simulated high-temperature environment, so as to test the performance of the mechanical seal module under high-temperature conditions. In addition, the tool is also equipped with a temperature measuring gun and an observation hole, which can monitor the temperature change and working status of the sealing surface in real time to ensure the sealing performance of the mechanical seal module in a high-temperature environment. This design not only improves the accuracy of the test, but also effectively evaluates the high-temperature resistance of the mechanical seal module in a high-temperature environment, and avoids damage or leakage of the sealing surface caused by high temperature. In this way, the present invention can provide reliable technical support for mechanical seal applications in high-temperature air environments, and ensure its stability and reliability in practical applications.

[0031] The tooling of the present invention can also simulate long-term operating conditions in a high-pressure deep-water environment, and evaluate the performance and life of the mechanical sealing module under high-pressure and long-term operating conditions. By connecting the sealing tank to the booster water pump, the tooling can generate a high-pressure environment inside the sealing tank, simulating the actual pressure conditions in a deep-water environment. At the same time, the tooling is also equipped with a water flow hole and a pressure gauge, which can calculate the leakage amount through the amount of water flowing out of the water flow hole, and evaluate the sealing performance of the mechanical sealing module in combination with the pressure gauge data. This design can ensure the pressure resistance and long-term operating stability of the mechanical sealing module in a high-pressure deep-water environment, and avoid deformation or wear of the sealing surface caused by high pressure or long-term operation. In this way, the present invention can provide reliable technical support for mechanical sealing applications in high-pressure deep-water environments, and ensure its stability and reliability in practical applications.

[0032] The tooling of the present invention can also dynamically adjust the elastic force between the moving ring and the stationary ring of the mechanical seal module, and evaluate the influence of different elastic forces on the performance and service life of the mechanical seal. Through the design of the adjusting ring and the adjusting screw, the tooling can dynamically control the elastic force between the moving ring and the stationary ring during the test process, optimizing the sealing performance. This dynamic adjustment function can ensure the sealing effect of the mechanical seal module under different working conditions, avoiding sealing performance problems caused by excessive or insufficient elastic force. In this way, the present invention can provide a scientific basis for the performance evaluation of the mechanical seal module, ensuring its stability and reliability in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the tooling in the high-temperature test environment of the present invention.

[0034] Figure 2 It is a schematic structural diagram of the tooling in the high-pressure test environment of the present invention.

[0035] Figure 3 It is a schematic connection structure diagram of the main shaft and the adjusting ring of the present invention.

[0036] Wherein: 1. Motor; 2. Coupling; 3. Main shaft; 4. Sealing tank; 5. Adjusting screw; 6. Adjusting ring; 7. Mechanical seal module; 8. Rotating shaft lip seal; 9. Bearing; 10. O-ring seal; 11. Locking nut and washer; 12. Plug; 13. Bearing housing; 14. Bearing cover; 15. Motor bracket; 16. Bearing bracket; 17. Pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following will describe the specific embodiments of the present invention with reference to the drawings.

[0038] As Figures 1 - 3 shown, the present invention relates to a tooling for testing the performance of a mechanical seal, mainly including a main shaft 3, a bearing module, a mechanical seal module 7, an adjusting ring 6, a seal test module, an environment simulation module, and a monitoring module, which is used to test the sealing problem between the main shaft 3 and the bearing housing 13 in the high-temperature and high-pressure environment in the deep sea.

[0039] Specifically, each structure will be described in detail below with reference to the drawings.

[0040] The main shaft 3 in this embodiment, as the rotating core part of the tooling, connects the driving module and realizes the rotating function. At the same time, the main shaft 3 is a cylindrical rotating body, which is connected to the motor 1 through the coupling 2, and the motor 1 is fixedly arranged through the motor bracket 15. One end of the main shaft 3 is provided with a round hole with a square keyway and is butted with the adjusting ring 6 for synchronous rotation. The main shaft 3 is also provided with a bearing installation step and a locking washer 11 and a locking nut 11 for cooperating with the bearing end cover.

[0041] The cylindrical design of the main shaft 3 ensures the stability of rotation. The connection of the coupling 2 is reliable. The fixed setting of the motor 1 through the motor bracket 15 guarantees the stable operation of the motor. The butt joint of the round hole with a square keyway and the adjusting ring 6 ensures the accuracy of synchronous rotation. The bearing mounting step and the setting of the lock washer 11 and lock nut 11 ensure the correct installation and fixation of the bearing 9.

[0042] In this embodiment, the bearing module consists of a bearing housing 13 and a bearing cover 14. The two are hermetically connected, and a cavity surrounding the main shaft 3 is provided inside.

[0043] In this tooling, the bearing housing 13 is fixedly set through a bearing bracket 16, and a columnar cavity is provided inside. The static ring of the mechanical seal module 7, the rotary shaft lip seal 8, and the bearing 9 are successively arranged in the cavity from left to right.

[0044] The columnar cavity design of the bearing housing 13 is reasonable, and the step setting is precise, ensuring the correct installation positions of the static ring of the mechanical seal module 7, the rotary shaft lip seal 8, and the bearing 9. The fixed setting of the bearing bracket 16 guarantees the stability of the entire tooling and provides a solid foundation for the test of the mechanical seal module 7.

[0045] The bearing cover 14 is hermetically connected to the bearing housing 13. A perforation for the main shaft 3 to pass through is provided on the bearing cover 14. The bearing 9 and the rotary shaft lip seal 8 are successively arranged in the perforation from left to right. The adjusting ring 6 is arranged at the other end of the bearing housing 13 and is butt-jointed with the main shaft 3. The adjusting ring 6 is an annular end.

[0046] The hermetic connection of the bearing cover 14 ensures the sealing of the test environment. The step design of the perforation facilitates the installation of the bearing 9 and the rotary shaft lip seal 8. The annular end design of the adjusting ring 6 is butt-jointed with the main shaft 3 to ensure the accuracy of synchronous rotation. The entire structure is reasonably designed and the function distribution is clear.

[0047] At least one threaded hole communicating with the columnar cavity is provided at the upper end of the bearing housing 13, and a water flow hole penetrating the columnar cavity is provided at the lower end. The water flow hole is located in the area between the static seal ring and the rotary shaft lip seal 8. A threaded hole communicating with the perforation is provided at the upper end of the bearing cover 14.

[0048] The setting of the threaded hole facilitates the filling of bearing lubricating oil. The position of the water flow hole is reasonable and can effectively measure the leakage amount.

[0049] In this embodiment, the mechanical seal module 7 is installed on the outer wall of a section where the main shaft 3 passes through the cavity for realizing the sealing function.

[0050] Specifically, the mechanical seal module 7 includes a rotating ring and a stationary ring. The stationary ring is installed on the bearing housing 13, and the rotating ring is installed on one side close to the adjusting ring 6. The elastic force between the rotating ring and the stationary ring is dynamically controlled by the axial movement of the adjusting ring 6.

[0051] The rotating ring and the stationary ring of the mechanical seal module 7 are reasonably designed. The stationary ring is fixed on the bearing housing 13, and the rotating ring is installed on one side close to the adjusting ring 6 to ensure the stability of the sealing contact. The elastic force between the rotating ring and the stationary ring is dynamically controlled by the axial movement of the adjusting ring 6 to achieve real-time adjustment of the sealing effect.

[0052] The adjusting ring 6 is composed of a mandrel and an outer ring. The mandrel is connected to the main shaft 3 and rotates synchronously, and the outer ring is buckled on the main shaft 3 and contacts the mechanical seal module 7.

[0053] In this embodiment, the seal test module includes a seal tank 4 connected to the end of the bearing housing 13 and an adjusting screw 5 on the same axis as the main shaft 3, and the adjusting ring 6 is axially moved along the cavity through spiral control.

[0054] The seal tank 4 is of a cylindrical structure, connected to the bearing housing 13 by a flange and screws, and is provided with a threaded hole corresponding to the adjusting screw 5 and a groove for the O-ring 10. The seal tank 4 is also provided with an interface for connecting a control valve, a booster pump, and a pressure gauge 17.

[0055] The cylindrical design of the seal tank 4 ensures a closed test environment. The settings of the threaded hole and the groove for the O-ring 10 ensure the correct installation of the adjusting screw 5 and the sealing effect. The setting of the interface facilitates the connection of the control valve, the booster pump, and the pressure gauge 17 to ensure that the parameters during the test are controllable and measurable.

[0056] Environmental simulation module: It includes a liquid interface provided on the seal tank 4 and an electric heating device provided on the bearing housing 13, which is used to simulate a high-temperature or high-pressure deep-water environment.

[0057] This tooling realizes the rotation function through the connection between the main shaft 3 and the drive module. The bearing housing 13 and the bearing cover 14 of the load-bearing module are hermetically connected to ensure the tightness of the test environment. The mechanical seal module 7 is installed on the outer wall of the main shaft 3, and the sealing effect is achieved through the contact of the adjusting ring 6. The seal test module controls the movement of the adjusting ring 6 through the adjusting screw 5 to simulate the sealing performance under actual working conditions. The environmental simulation module can simulate the high-temperature and high-pressure conditions in the deep-water environment through the liquid interface and the electric heating device to ensure the accuracy and reliability of the test results.

[0058] In this embodiment, the lubrication and seal module includes threaded holes and plugs 12 provided on the bearing housing 13 and the bearing cover 14 for replenishing lubricating oil.

[0059] The setting of the lubrication and sealing module facilitates the replenishment of lubricating oil. The design of the threaded holes and the plug 12 ensures the accurate injection position and sealing performance of the lubricating oil, guarantees the good lubrication of components such as the bearing 9, and extends the service life of the tooling.

[0060] According to the above-mentioned tooling, it also includes a monitoring module for real-time monitoring of the temperature, pressure, and leakage volume in the sealing area. The monitoring module includes a pressure gauge 17, a temperature gun, and an observation hole on the bearing housing 13.

[0061] The pressure gauge 17 of the monitoring module is used to measure the pressure value in the sealing area, the temperature gun is used to monitor the temperature change during the working process, and the observation hole provides an intuitive view of leakage. These monitoring means work together to comprehensively evaluate the performance indicators of the mechanical seal module 7 and provide reliable data support for the test.

[0062] The leakage volume in the monitoring module is calculated by the flow rate of the water flow hole below the bearing housing 13, and the sealing performance is evaluated in combination with the data of the pressure gauge 17 and the temperature gun.

[0063] The monitoring module calculates the leakage volume through the flow rate of the water flow hole, and comprehensively evaluates the performance of the mechanical seal module 7 by combining the pressure value measured by the pressure gauge 17 and the temperature value measured by the temperature gun. This comprehensive monitoring method can accurately reflect the sealing effect and provide a reliable basis for the test results.

[0064] Embodiment 1

[0065] As Figure 1 shown, for the short-time operation performance test in a high-temperature air environment, the tooling mainly consists of a motor 1, a coupling 2, a main shaft 3, a sealing tank 4, an adjusting screw 5, an adjusting ring 6, a mechanical seal module 7, a rotary shaft lip seal 8, a bearing 9, an O-ring 10, a lock nut and washer 11, a plug 12, a bearing housing 13, a bearing cover 14, a motor bracket 15, and a bearing bracket 16, etc. The motor 1 is connected to the coupling 2 to drive the main shaft 3 to rotate. The main shaft 3 is connected to the sealing tank 4 through the mechanical seal module 7 to ensure the sealing performance.

[0066] Among them, the middle part inside the bearing housing 13 is a cylindrical hollow structure, and there are steps designed from left to right to install the stationary ring of the mechanical seal module, the rotary shaft lip seal 8, and the bearing 9 respectively; there are two threaded holes designed from left to right above to lead to the inside of the cavity; there is a water flow hole designed between the stationary ring of the mechanical seal module and the rotary shaft lip seal 8 below to lead to the bottom of the bearing housing 13.

[0067] The inside of the bearing cover 14 is also a cylindrical hollow structure, and there are steps designed from left to right to install the bearing 9 and the rotary shaft lip seal 8 respectively. There is a threaded hole designed above to lead to the inside of the cavity.

[0068] The main shaft 3 is a cylindrical rotating body structure. There are round holes with square keyways on the upper and lower sides at the left end, and an installation step is designed on the right side to install the bearing 9. There are grooves and threads designed on the right side of the installation section of the bearing 9 to install the lock washer 11 and the lock nut 11 respectively.

[0069] As Figure 3 shown, it is the installation and connection structure between the adjusting ring 6 and the main shaft 3. The outer ring structure of the adjusting ring 6 contacts the adjusting screw 5 and the dynamic ring of the mechanical seal module 7 respectively, which can realize the real-time adjustment of the elastic force, and the mandrel facilitates the installation and adjustment of the adjusting ring 6 on the main shaft 3. The mandrel is a square structure, which is convenient to cooperate with the square keyway round hole opened on the main shaft 3, ensuring the stable connection between the adjusting ring 6 and the main shaft 3. The selection of self-lubricating materials greatly improves the service life of the adjusting ring 6.

[0070] The specific installation process is as follows:

[0071] During installation, first install the static ring of the mechanical seal module, the rotary shaft lip seal 8, and the bearing 9 at the corresponding positions inside the bearing housing 13 and the bearing cover 14 respectively. Lock and seal the water flow hole below the bearing housing 13 with the plug 12. Among them, the rotary shaft lip seal 8 inside the bearing housing 13 is not installed. During the installation process, the installation positions of the static ring of the mechanical seal module, the rotary shaft lip seal 8, and the bearing 9 need to be accurately aligned to ensure the sealing performance. The locking of the plug 12 can effectively prevent leakage at the water flow hole and ensure the stability of the sealing performance.

[0072] Secondly, insert the main shaft 3 into the bearing housing 13 from the left side. After installation, install the lock washer 11 and the lock nut 11 from the right side of the main shaft 3 and lock them; connect the O-ring 10 and the bearing cover 14 to the right end face of the bearing housing 13 with screws. Then install the dynamic ring 7 of the mechanical seal module on the leftmost side of the main shaft 3, and insert the adjusting ring 6 into the installation hole on the left side of the main shaft 3; screw the adjusting screw 5 into the seal tank 4 and install the O-ring 10 and fix it to the end face of the bearing housing 13 with screws.

[0073] Finally, connect the completed part after the overall installation to the bearing support 16 with screws and connect it to the motor 1 through the coupling 2. Among them, the motor 1 is installed on the motor support 15, and the motor support 15 and the bearing support 16 are fixed to the foundation surface. After the overall installation is completed, the connections between the components need to be carefully checked to ensure the stability of the installation and the sealing performance. The setting of the motor 1 and the motor support 15 can provide stable driving force, and the fixation of the bearing support 16 ensures the stability of the overall tooling.

[0074] The specific test process in this embodiment is as follows:

[0075] Inject the grease into the cavity through one of the two threaded holes on the upper right side of the test tooling. Stop injecting when the grease overflows from the other hole, and lock and seal the two threaded holes with the plug 12. Connect the bearing housing 13 to the electric heating device and preheat the bearing housing 13 by connecting the power supply. When it reaches the actual simulated temperature, turn on the motor 1 and set the rotational speed of the motor 1 to the actual operating speed of the shaft. The main shaft 3 rotates inside the bearing housing 13 driven by the motor 1. The injection and sealing of the grease are the key steps of the test to ensure the lubrication effect inside the cavity. The connection and preheating of the electric heating device can simulate the actual working conditions in a high-temperature air environment, and the rotational speed setting of the motor 1 ensures that the operating state of the main shaft 3 is consistent with the actual application.

[0076] At the same time, control the screwing depth of the screw 5 by rotating the screw 5 to dynamically control and adjust the axial position of the adjusting ring 6 on the main shaft 3, so as to adjust the elastic force between the moving ring 7 and the stationary ring. The left hole above the bearing housing 13 is the measurement and observation hole, and directly below the hole is the friction sealing surface of the dynamic ring 7 and the stationary ring of the mechanical seal module. The temperature of the friction surface can be measured with a temperature gun and the working condition can be observed. Whether the mechanical seal module 7 meets the requirements can be judged by whether the temperature is greater than the allowable operating temperature of the material or whether there is grease leakage within a specified time. The adjustment of the screw 5 can dynamically adjust the elastic force between the moving ring 7 and the stationary ring to ensure the optimization of the sealing performance. The setting of the temperature gun and the observation hole can monitor the temperature and working state of the sealing surface in real time, providing reliable data support for performance evaluation.

[0077] Example 2

[0078] Performance test for long-term operation in a high-pressure deep-water environment is as Figure 2 shown. The installation steps are similar to the Figure 1 working conditions. The difference is that at this time, it is necessary to install the rotary shaft lip seal 8 inside the bearing housing 13, do not install the plug 12 of the water flow hole below the bearing housing 13, and connect the end of the sealing tank 4 to the control valve and the booster pump, and connect the side to the pressure gauge 17. The installation of the rotary shaft lip seal 8 can form a sealed cavity for the bearing chamber to prevent the leakage of lubricating oil. The connection of the sealing tank 4 to the control valve and the booster pump facilitates the adjustment and control of the pressure.

[0079] The specific test process in this example is as follows:

[0080] During the test, the grease is injected into the cavity through one of the two threaded holes on the upper right side of the test device. Stop injecting when the grease overflows from the other hole, and lock and seal all the threaded holes above with the plug 12. Fill the inside of the sealed tank 4 with water, convert it into an equivalent water pressure according to the actual working depth of the mechanical seal module 7, open the control valve, and start the booster pump to increase the pressure. At the same time, observe the value of the pressure gauge 17. When the set value is reached, close the control valve and the booster pump. Set the speed of the motor 1 to the actual operating speed of the shaft. The main shaft 3 rotates inside the bearing housing 13 driven by the motor 1. The injection and sealing of the grease are the key steps of the test to ensure the lubrication effect inside the cavity. The use of the booster pump can simulate the actual working conditions under high-pressure deep-water environment, and the monitoring of the pressure gauge 17 can grasp the pressure change inside the sealed tank 4 in real time.

[0081] At the same time, the axial position of the adjusting ring 6 on the main shaft 3 is dynamically controlled by rotating the screw 5 to control the screwing depth of the screw 5, so as to adjust the elastic force between the dynamic ring 7 and the static ring. Calculate the leakage amount from the water flow hole, and evaluate the performance of the mechanical seal module 7 under specific pressure, speed, elastic force and time. The adjustment of the screw 5 can dynamically adjust the elastic force between the dynamic ring 7 and the static ring to ensure the optimization of the sealing performance. The amount of water flowing out of the water flow hole can accurately reflect the quality of the sealing performance and provide reliable data support for performance evaluation.

[0082] A tooling for testing the performance of mechanical seals provided by the present invention is driven by a motor 1, has a compact structure, and can respectively simulate the real working conditions of the mechanical seal module 7 running for a short time in a high-temperature air environment and running for a long time in a high-pressure deep-water environment through simple replacement, and can dynamically adjust the elastic force between the dynamic ring 7 and the static ring during the test to verify the performance and life of the mechanical seal module 7 under different elastic forces in the above test environment. The modular design and simple replacement function of this tooling greatly improve the flexibility and efficiency of the test and can adapt to different test requirements. The dynamic adjustment function can optimize the sealing performance in real time to ensure the accuracy and reliability of the test results.

[0083] The device is provided with observation and measurement openings and leakage water outlets, and the working conditions, actual temperature and leakage amount of the mechanical seal module 7 area can be observed and measured in real time during operation, which can intuitively and effectively provide a practical evaluation method for the actual application in the above specific environment. The setting of the observation and measurement openings and leakage water outlets can facilitate the testers to monitor the working state of the sealing area in real time, ensure the safety and reliability of the test, and provide reliable technical support for the actual application.

[0084] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims. Within the protection scope of the present invention, any form of modification can be made.

Claims

1. A tool for testing mechanical seal performance, characterized in that: include: A main shaft, which is connected to the drive module and realizes rotation; The bearing module comprises a bearing box and a bearing cover which are sealed to each other, and a cavity covering a part of the main shaft is arranged in the bearing box and the bearing cover; A mechanical seal module is arranged on a section of the outer wall of the main shaft passing through the cavity; The adjusting ring comprises a core shaft and an outer ring connected to each other, the core shaft is connected to the main shaft and rotates synchronously, and the outer ring is buckled on the main shaft and contacts the mechanical seal module; A sealing test module, comprising a sealing pot sealedly connected to the end of the bearing housing, and an adjusting screw on the same axis as the main shaft is connected to the sealing pot, and the adjusting screw abuts against an adjusting ring and controls the adjusting ring to move axially along the cavity through a thread; The environmental simulation module includes a liquid interface arranged on the sealing tank and an electric heating device arranged on the bearing box, and is used to simulate a high-temperature or high-pressure deep-water environment.

2. The tooling for mechanical seal performance testing according to claim 1, characterized in that: It also includes a monitoring module, which includes a pressure gauge, a temperature measuring gun and an observation hole on the bearing box, and is used to monitor the temperature, pressure and leakage of the sealing area in real time.

3. The tooling for mechanical seal performance testing according to claim 1, characterized in that: The bearing box is fixed by a bearing bracket, and a columnar cavity is arranged inside the bearing box. The columnar cavity is provided with a step-mounted mechanical seal module, a rotating shaft lip seal ring and a bearing in sequence from left to right.

4. The tooling for mechanical seal performance testing according to claim 3, characterized in that: The bearing cover is sealed and connected to the bearing box, and a through hole is opened on the bearing cover to facilitate the passage of the main shaft, and steps are arranged inside the through hole from left to right to install the bearing and the rotating shaft lip sealing ring; the adjustment ring is arranged at the other end of the bearing box and docked with the main shaft, and the adjustment ring is a ring end.

5. The tooling for mechanical seal performance testing according to claim 4, characterized in that: The upper end of the bearing box is provided with at least one threaded hole connected to the columnar cavity, and the lower end of the bearing box is provided with a water flow hole that passes through the columnar cavity, and the water flow hole is located in the area between the sealing static ring and the lip sealing ring of the rotating shaft, and the upper end of the bearing cover is provided with a threaded hole connected to the through hole.

6. The tooling for mechanical seal performance testing according to claim 5, characterized in that: The main shaft is a cylindrical rotating body, which is connected to the motor through a coupling, and the motor is fixed by a motor bracket. One end of the main shaft is provided with a round hole with a square keyway and is connected to the adjusting ring for synchronous rotation. The main shaft is also provided with a bearing installation step, a locking washer and a locking nut that cooperate with the bearing end cover.

7. The tooling for mechanical seal performance testing according to claim 1, characterized in that: The sealing tank is a cylindrical structure, which is connected to the bearing box through a flange and screws, and is provided with a threaded hole and an O-ring groove corresponding to the adjustment screw. The sealing tank is also provided with an interface to connect the control valve, the booster water pump and the pressure gauge.

8. The tooling for mechanical seal performance testing according to claim 1, characterized in that: The mechanical seal module comprises a dynamic ring and a static ring, wherein the static ring is mounted on the bearing housing and the dynamic ring is mounted on a side close to the adjusting ring, and the elastic force between the dynamic ring and the static ring is dynamically controlled through the axial movement of the adjusting ring.

9. The tooling for mechanical seal performance testing according to claim 1, characterized in that: It also includes a lubrication sealing module, which includes threaded holes and screw plugs arranged on the bearing box and the bearing cover for replenishing lubricating oil.

10. The tooling for mechanical seal performance testing according to claim 2, characterized in that: The leakage amount in the monitoring module is calculated by the flow rate of the water flow hole below the bearing box, and the sealing performance is evaluated in combination with the data of the pressure gauge and the temperature measuring gun.

Images