Device and system for testing sealing performance of dynamic seal

Abstract

The invention discloses a sealing performance testing device and testing system for a dynamic seal, relates to the technical field of tidal current energy power generation and dynamic seal performance testing, is used for detecting the sealing performance of the dynamic seal of a tidal current energy power generator in seawater, and is characterized in that a sealed cabin is provided with an inner cavity and a testing hole communicated with the inner cavity. The pressure adjusting assembly is used for adjusting the pressure of the fluid medium in the inner cavity. The first end of the rotating shaft penetrates through the testing hole and extends into the inner cavity, the rotating shaft can rotate around the axis of the rotating shaft relative to the sealing cabin, a sealing gap is formed between the peripheral wall face of the rotating shaft and the inner wall face of the testing hole, the rotating shaft is sleeved with a dynamic seal, and the dynamic seal is at least partially located in the sealing gap. The driving assembly is used for driving the rotating shaft to rotate. The collecting assembly is used for collecting at least one of the pressure value of the fluid medium in the inner cavity, the temperature of the sealing cabin at the sealing gap, the leakage image of the sealing gap, the leakage amount and the friction torque of the dynamic seal so as to obtain the sealing performance of the dynamic seal. The testing device is used for testing the sealing performance of the dynamic seal.

Description

Technical Field

[0001] The present application relates to the technical fields of tidal current power generation and dynamic seal performance testing, and particularly relates to a dynamic seal performance testing device and a testing system for a dynamic seal. Background Art

[0002] With the development of clean energy, power generation methods such as wind power and hydropower have received increasing attention. Among them, tidal power generation belongs to a type of hydropower. In tidal power generation, the entire generator is placed in water. Therefore, a dynamic seal needs to be designed at the rotational connection position between the bearing and the rotating shaft to prevent water from seeping into the connection position between the bearing and the rotating shaft, avoid its corrosion, and thus ensure the long-term normal operation of the generator and improve the reliability of the tidal current generator.

[0003] In the related art, the dynamic seal is directly installed in the generator. However, it is very difficult to ensure that the dynamic seal can meet the actual sealing requirements in water, so there is a problem of unqualified sealing. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a dynamic seal performance testing device and a testing system for testing the sealing performance of a dynamic seal under different pressure environments.

[0005] The present application is realized through the following technical solutions.

[0006] In a first aspect, the present application provides a dynamic seal performance testing device, including a sealing chamber, a pressure regulating assembly, a rotating shaft, a driving assembly, and a collecting assembly. The sealing chamber has an inner cavity and a testing hole communicating with the inner cavity. The pressure regulating assembly is used to adjust the pressure of the fluid medium in the inner cavity. The first end of the rotating shaft passes through the testing hole and extends into the inner cavity. The rotating shaft can rotate relative to the sealing chamber around its axis. There is a sealing gap between the peripheral wall surface of the rotating shaft and the inner wall surface of the testing hole. The rotating shaft is used to sleeved with the dynamic seal, and the dynamic seal is used to be at least partially located in the sealing gap. The driving assembly is used to drive the rotating shaft to rotate. The collecting assembly is used to collect at least one of the pressure value of the fluid medium in the inner cavity, the temperature of the sealing chamber at the sealing gap, the leakage image of the sealing gap, the leakage amount, and the friction torque of the dynamic seal to obtain the sealing performance of the dynamic seal.

[0007] In the technical solution of the embodiment of the present application, the sealing chamber can be loaded with a fluid medium, and the pressure applied to the dynamic seal by the fluid medium can be controlled by adjusting the pressure of the fluid medium. Since the dynamic seal is at least partially located in the sealing gap, the dynamic seal can seal the space between the outer peripheral wall of the rotating shaft and the inner peripheral surface of the testing hole, that is, block the sealing gap. In this way, it also simulates the sealing scenario of the generator in water and the dynamic seal for the connection position between the rotating shaft and the bearing of the generator.

[0008] During actual testing, the driving component is used to drive the rotating shaft to rotate. Under the dual actions of the rotation of the rotating shaft and the pressure exerted by the fluid medium on the dynamic seal, some fluid medium may seep out from the seal gap to the outside of the inner cavity. Since the acquisition component can acquire at least one of the pressure value of the fluid medium in the inner cavity, the temperature of the seal chamber at the seal gap, the leakage image of the seal gap, the leakage amount, and the friction torque of the dynamic seal, it is possible to judge whether there is leakage at the seal gap according to the pressure values of the fluid medium in the inner cavity collected at different times through the change of the pressure values. According to the temperature of the seal chamber at the seal gap, the temperature of the dynamic seal can be judged to judge the temperature change of the dynamic seal under the dual conditions of the fluid medium pressure and the rotation of the rotating shaft. It is also possible to directly judge the sealing performance of the dynamic seal by detecting the leakage amount and leakage image of the fluid medium at the seal gap. It is also possible to judge the wear condition of the dynamic seal through the friction torque of the dynamic seal to judge the performance of the dynamic seal.

[0009] The test device in this application can simulate the environment of the generator in different water pressures. By detecting data such as the pressure value of the fluid medium in the inner cavity, the temperature of the dynamic seal, the leakage flow rate at the seal gap, the leakage image, and the friction torque of the dynamic seal, the sealing performance of the dynamic seal can be judged, so as to judge whether the dynamic seal meets the sealing requirements.

[0010] In some embodiments, the test device further includes a protective member. The protective member has a socket hole coaxially arranged with the rotating shaft. The protective member is sleeved on the rotating shaft through the socket hole, and the protective member is located between the rotating shaft and the dynamic seal.

[0011] By setting the protective member, the dynamic seal is sleeved outside the protective member instead of directly outside the rotating shaft, so as to avoid abrasion between the rotating shaft and the dynamic seal during rotation and extend the service life of the rotating shaft.

[0012] In some embodiments, the socket hole is a blind hole. The first end of the rotating shaft extends into the blind hole, and the first end of the rotating shaft is fixed to the bottom surface of the blind hole.

[0013] With such a setting, the protective member can be fixed to the first end of the rotating shaft through the bottom surface of the blind hole. Such a fixation can avoid affecting the peripheral wall of the protective member, so as to ensure that the dynamic seal can be stably arranged on the peripheral wall of the protective member and ensure that the dynamic seal is not affected by the fixation of the dynamic seal and the rotating shaft.

[0014] In some embodiments, the test device further includes at least one bearing. The bearing is coaxially arranged with the rotating shaft and sleeved on the rotating shaft, and the outer ring of the bearing is connected to the seal chamber, and the inner ring of the bearing is connected to the rotating shaft.

[0015] In this way, the bearing can support the rotating shaft to ensure that the rotating shaft can rotate stably in the test hole, ensuring the stability and accuracy of the test.

[0016] In some embodiments, the number of bearings is two, and the two bearings include two angular contact ball bearings. Along the extending direction of the rotating shaft, the two angular contact ball bearings are arranged back to back.

[0017] With such an arrangement, the two angular contact ball bearings can improve the support stiffness, enhance the support strength for the rotating shaft, thereby improving the rotation accuracy of the rotating shaft, enabling the part of the rotating shaft extending into the inner cavity to withstand higher torque loads, and ensuring the stability of the rotation of the rotating shaft.

[0018] In some embodiments, it further includes a support member, which is connected to the sealed chamber and located outside the inner cavity. The support member has a support channel, and the support channel is coaxially arranged with the test hole. The rotating shaft passes through the support channel to extend into the test hole, and the bearing is arranged in the support channel, and the outer ring of the bearing is connected to the support member.

[0019] In this way, the setting of the support member can provide an installation position for the bearing, facilitating the installation and fixation of the bearing. And since the support member is located outside the inner cavity, the bearing is also installed outside the inner cavity. This can not only save the space inside the inner cavity, but also prevent the bearing from contacting the fluid medium and being eroded, thereby extending the service life of the bearing.

[0020] In some embodiments, along the axial direction of the rotating shaft, the end of the support member close to the sealed chamber is in fitting contact with the sealed chamber, and the sealing gap is within the circumferential range of the support channel; the acquisition assembly includes at least one of a first pressure sensor, a collection hole, a temperature sensor, and an image acquisition unit. The first pressure sensor is arranged on the sealed chamber and is used to detect the pressure value of the fluid medium inside the inner cavity; the collection hole is arranged on the lower side of the support member and communicates with the support channel, and the collection hole is used to collect the fluid medium seeping through the sealing gap; the temperature sensor is connected to the sealed chamber and is located at the sealing gap; the image acquisition unit is connected inside the support channel and faces the sealing gap.

[0021] With such an arrangement, if leakage occurs at the sealing gap, the pressure value inside the inner cavity will change. According to the amount of change in the pressure value, the sealing performance of the dynamic seal can be indirectly judged. The fluid medium will flow out through the sealing gap into the support channel, and then through the collection hole, and the leaked fluid medium can be collected through the collection hole. Moreover, the temperature sensor can also indirectly detect the temperature of the dynamic seal by detecting the temperature of the sealed chamber at the sealing gap. In addition, the image acquisition unit can directly take pictures or record videos of the leakage picture at the sealing gap. Thus, the sealing performance of the dynamic seal is judged based on the detection data of at least one of the first pressure sensor, the collection hole, the temperature sensor, and the image acquisition unit.

[0022] In some embodiments, the acquisition component further includes a torque detection device. The torque detection device is disposed between the output shaft of the driving component and the second end of the rotating shaft. One end of the torque detection device is connected to the output end of the output shaft through a first coupling, and the other end of the torque detection device is connected to the second end of the rotating shaft through a second coupling.

[0023] In this way, when the rotating shaft is driven to rotate by the driving component, the driving force generated by the output shaft of the driving component will pass through the torque detection device. Thus, the magnitude of the frictional torque can be judged, and based on this, the state and leakage condition of the dynamic seal under different rotational torques of the rotating shaft can be judged, so as to more accurately detect the performance of the dynamic seal.

[0024] In some embodiments, the sealed cabin includes: a cabin body and an end cover. The cabin body is formed with a fluid medium channel; both ends of the fluid medium channel are respectively provided with end covers and are adjacent to the cabin body to form an inner cavity; a test hole is provided on the end cover, and the dynamic seal is used to be fixed on the end cover.

[0025] With such a setting, a sealed cabin can be formed by the end cover and the cabin body. Since the dynamic seal is fixed on the end cover, along the extension direction of the fluid medium channel, the size of the dynamic seal can be adjusted to detect various types and sizes of dynamic seals.

[0026] In some embodiments, the pressure regulating component includes: a booster pump, a liquid inlet pipeline, and an overflow pipeline. One end of the liquid inlet pipeline is communicated with the fluid medium outside the inner cavity, the other end of the liquid inlet pipeline is communicated with the inner cavity, and the booster pump is disposed on the liquid inlet pipeline. One end of the overflow pipeline is communicated with the inner cavity, and the overflow pipeline can be shut off or conducted.

[0027] With such a setting, the booster pump can adjust the pressure of the fluid medium entering the inner cavity, and the overflow pipeline can overflow the excess fluid medium, so as to adjust the pressure of the fluid medium in the inner cavity through pressurization and pressure relief. Thus, the sealing performance of the dynamic seal under different pressure environments can be tested.

[0028] In some embodiments, the pressure regulating component further includes a first filter, a second filter, and a third filter. The first filter is located in the liquid inlet pipeline and before the liquid inlet of the booster pump; the second filter is located on the liquid inlet pipeline and between the liquid outlet of the booster pump and the sealed cabin; the third filter is disposed on the overflow pipeline.

[0029] With such a setting, the first filter can prevent sundries from entering the booster pump, thus ensuring the normal operation of the booster pump. The second filter can prevent sundries from entering the inner cavity, and the third filter can filter the sundries in the overflow pipeline to avoid blocking of the overflow pipeline.

[0030] In a second aspect, the present application also provides a sealing performance test system for dynamic sealing, which includes a dynamic seal and a performance test device for the dynamic seal in any of the above embodiments. The dynamic seal is connected to the seal chamber and at least partially located in the seal gap to seal the seal gap.

[0031] In the technical solution of the embodiment of the present application, since it includes the performance test device for the dynamic seal in any of the above embodiments, the same beneficial effects can be achieved.

[0032] In some embodiments, the dynamic seal includes: a first sealing portion and a second sealing portion. The first sealing portion is disposed in the seal gap and fixed to the seal chamber; the second sealing portion is disposed in the inner cavity, sleeved on the rotating shaft, and fixed to the seal chamber. Along the axial direction of the rotating shaft, the second sealing portion at least partially shields the seal gap.

[0033] With such a setting, the first sealing portion is directly located in the seal gap to block the seal gap, and the second sealing portion is located inside the seal gap to block the seal gap. The two cooperate to achieve better sealing of the seal gap.

[0034] In some embodiments, the second sealing portion includes: a first fixed base and a first sealing unit. The first fixed base is fixed to the seal chamber and disposed circumferentially along the rotating shaft. The inner wall surface of the first fixed base facing the rotating shaft has an installation groove, and the installation groove is disposed circumferentially along the rotating shaft; the first sealing unit is disposed in the installation groove, and the sealing lip of the first sealing unit contacts and seals the rotating shaft; or,

[0035] The second sealing portion includes: a second fixed base and a second sealing unit. The second fixed base is fixed to the seal chamber and disposed circumferentially along the rotating shaft; the second sealing unit includes a static seal body, a dynamic seal body, and an elastic body. The static seal body is disposed circumferentially along the rotating shaft and disposed between the second fixed base and the rotating shaft and fixed to the second fixed base. The dynamic seal body is disposed circumferentially along the rotating shaft to be sleeved on the rotating shaft. Along the axial direction of the rotating shaft, the dynamic seal body is disposed on the side of the static seal body away from the seal gap and contacts the static seal body to form a sealing surface, and the elastic body presses the sealing surface.

[0036] With the above settings, in the first case, the first sealing unit is located in the installation groove, fixed by the first fixed base, and sealed by the first sealing unit to ensure the stability of the seal. In the second case, the second fixed base provides a fixed position for the static seal body and fixes the static seal body. At the same time, the dynamic seal body is fixed on the rotating shaft, and the elastic body presses a part of the dynamic seal body against the static seal body to form a sealing surface. Thus, when the rotating shaft rotates, the dynamic seal body and the elastic body rotate with the rotating shaft, and the dynamic seal body and the static seal body move relative to each other and rub against each other at the sealing surface, thereby achieving sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0038] Figure 1 Schematic diagram of the external structure of the sealing performance test system for dynamic seals provided in some embodiments of the present application;

[0039] Figure 2 Schematic sectional view of the sealing performance test system for dynamic seals provided in some embodiments of the present application;

[0040] Figure 3 Schematic diagram of the external structure of the pressure regulating component and the sealing chamber provided in some embodiments of the present application;

[0041] Figure 4 Schematic sectional view of the dynamic seal installed on the sealing chamber provided in some embodiments of the present application;

[0042] Figure 5 Another schematic sectional view of the dynamic seal installed on the sealing chamber provided in some embodiments of the present application.

[0043] Explanation of reference numerals

[0044] 01 - Sealing performance test system for dynamic seals; 1 - Sealing performance test device for dynamic seals; 11 - Sealing chamber; 111 - Chamber body; 112 - End cover; a - Inner cavity; b - Test hole; 12 - Pressure regulating component; 121 - Booster pump; 122 - Liquid inlet pipeline; 1221 - First pipe section; 1222 - Second pipe section; 123 - Overflow pipeline; 1231 - Third pipe section; 1232 - Fourth pipe section; 124 - First straight-through; 125 - Second straight-through; 126 - First filter; 127 - Second filter; 128 - Third filter; 129 - Check valve; 130 - Control valve; 1301 - Quick connector; 1302 - Second pressure gauge; 1303 - Bypass pipeline; 1304 - Relief valve; 1305 - Container;

[0045] 13 - Rotating shaft; 131 - Shoulder; 14 - Driving component; 15 - Acquisition component; 151 - Collection hole; 152 - Temperature sensor; 153 - Image acquisition unit; 16 - Carrying platform; 17 - Protective part; c - Socket hole; 18 - Bearing; 18A - First bearing; 18B - Second bearing; 19 - Support part; 191 - Body part; 1911 - Contact part; 192 - Cover plate; d - Support channel; e - Through hole; 200 - Oil baffle ring; 201 - Locking nut; 202 - Torque detection device; 203 - First coupling; 204 - Second coupling; 205 - Control module; 206 - First pressure sensor; 207 - First sealing ring; 208 - First sealing groove; 209 - Second sealing ring; 210 - Second sealing groove; 2101 - Third sealing ring; 2102 - Third sealing groove;

[0046] 2 - Dynamic seal; 21 - First sealing part; 22 - Second sealing part; 221 - First fixed base; 2211 - Carrying seat; g - Installation groove; 2212 - Pressing plate; 222 - First sealing unit; 223 - Second fixed base; 224 - Second sealing unit; 2241 - Static sealing body; 2242 - Dynamic sealing body; k1 - Guide frame; k12 - Guide channel; k2 - Sealing body; 2243 - Elastic body; h - Sealing surface. Detailed implementation manners

[0047] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.

[0050] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will understand explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0052] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense. It can be direct contact or contact through an intermediate medium layer. It can be contact where there is basically no mutual force between the two in contact, or contact where there is a mutual force between the two in contact.

[0055] Next, the present application will be described in detail.

[0056] With the development of clean energy, power generation methods such as wind power and hydropower have received increasing attention. Among them, tidal power generation belongs to a type of hydropower generation. In tidal power generation, the entire generator is placed in water. Therefore, a dynamic seal needs to be designed at the rotating connection position of the bearing and the rotating shaft to prevent water from seeping into the connection position of the bearing and the rotating shaft and avoid its corrosion, so as to ensure the long-term normal operation of the generator.

[0057] In the related art, the dynamic seal is directly installed in the generator. However, it is very difficult to ensure that the dynamic seal can meet the actual sealing requirements in water, so there is a risk of non-compliant sealing.

[0058] Therefore, the present application provides a sealing performance testing device for a dynamic seal, which simulates the underwater environment by using the sealing performance testing device for the dynamic seal to detect the sealing performance of the dynamic seal, so as to judge whether the dynamic seal meets the actual sealing requirements.

[0059] Specifically, as Figure 1 、 Figure 2 shown, the present application provides a sealing performance testing device 1 for a dynamic seal, including a sealing chamber 11, a pressure regulating assembly 12, a rotating shaft 13, a driving assembly 14 and a collecting assembly 15. The sealing chamber 11 has an inner cavity a and a test hole b communicating with the inner cavity a. The pressure regulating assembly 12 is used to adjust the pressure of the fluid medium in the inner cavity a. The first end of the rotating shaft 13 passes through the test hole b and extends into the inner cavity a. The rotating shaft 13 can rotate relative to the sealing chamber 11 around its axis. There is a sealing gap between the peripheral wall surface of the rotating shaft 13 and the inner wall surface of the test hole b. The rotating shaft 13 is used to sleeve the dynamic seal 2, and the dynamic seal 2 is used to be at least partially located in the sealing gap. The driving assembly 14 is used to drive the rotating shaft 13 to rotate. The collecting assembly 15 is used to collect at least one of the pressure value of the fluid medium in the inner cavity a, the temperature of the sealing chamber 11 at the sealing gap, the leakage image at the sealing gap, the leakage amount and the friction torque of the dynamic seal 2, so as to obtain the sealing performance of the dynamic seal 2.

[0060] Among them, the shape of the test hole b can be a regular shape such as a circle or a square, and of course it can also be an irregular shape. However, it can be understood that the inner hole of the dynamic seal 2 matching the rotating shaft 13 should be circular, so as to meet the actual sealing and rotating requirements.

[0061] In addition, the fluid medium can be oil, seawater, fresh water, and water containing sediment, etc. Specifically, it can be selected according to requirements.

[0062] In some examples, the shape of the inner cavity a can be a regular shape such as a cylindrical shape or a cuboid shape, or an irregular shape.

[0063] In some examples, the driving assembly 14 can include various motors, gearboxes, frequency converters, control cabinets, etc.

[0064] It should be explained that the temperature of the sealed cabin 11 at the sealed gap refers to the temperature on the part of the sealed cabin 11 that surrounds the rotating shaft 13 to form the sealed gap.

[0065] It can be understood that the sealing performance of the dynamic seal 2 can be evaluated in the following ways: evaluating according to the pressure value in the inner cavity a; evaluating according to the temperature of the sealed cabin 11 at the sealed gap; evaluating according to the leakage image of the sealed gap; evaluating according to the leakage amount of the sealed gap; evaluating according to the frictional torque of the dynamic seal 2; comprehensively evaluating according to both the temperature of the sealed cabin 11 at the sealed gap and the leakage image of the sealed gap; comprehensively evaluating according to both the temperature of the sealed cabin 11 at the sealed gap and the leakage amount of the sealed gap; comprehensively evaluating according to both the leakage image and the leakage amount of the sealed gap; comprehensively evaluating according to the temperature of the sealed cabin 11 at the sealed gap, the leakage image of the sealed gap and the leakage amount of the sealed gap; comprehensively evaluating according to the pressure value in the inner cavity a, the temperature of the sealed cabin 11 at the sealed gap, the leakage image of the sealed gap, the leakage amount of the sealed gap and the frictional torque of the dynamic seal 2.

[0066] In some examples, as Figure 1 shown, the sealing performance test device 1 of the dynamic seal further includes a carrier table 16, and structures such as the driving assembly 14 and the sealed cabin 11 are all arranged on the carrier table 16, so as to ensure the stability of the arrangement of structures such as the driving assembly 14 and the sealed cabin 11.

[0067] Through the above settings, the sealed cabin 11 can be loaded with a fluid medium, and the pressure applied to the dynamic seal 2 by the fluid medium can be controlled by adjusting the pressure of the fluid medium. Since the dynamic seal 2 is at least partially located in the sealed gap, the dynamic seal 2 can seal the space between the outer peripheral wall of the rotating shaft 13 and the inner peripheral surface of the test hole b, that is, block the sealed gap. In this way, it also simulates the sealing scenario of the dynamic seal 2 at the connection position of the rotating shaft and the bearing 18 of the generator when the generator is in water.

[0068] During actual testing, the drive component 14 is used to drive the rotation of the rotating shaft 13. Under the dual actions of the rotation of the rotating shaft 13 and the pressure exerted by the fluid medium on the dynamic seal 2, some fluid medium may seep out from the seal gap to the outside of the inner cavity a. Since the acquisition component 15 can acquire at least one of the temperature of the seal chamber 11 at the seal gap, the leakage image of the seal gap, and the leakage amount, the temperature of the dynamic seal 2 can be judged according to the temperature of the seal chamber 11 at the seal gap, so as to judge the temperature change of the dynamic seal 2 under the dual conditions of the fluid medium pressure and the rotation of the rotating shaft 13, and then judge whether the temperature of the dynamic seal 2 meets the requirements. It is also possible to directly judge the sealing performance of the dynamic seal 2 by detecting the leakage amount and leakage image of the fluid medium at the seal gap.

[0069] The sealing performance test device 1 of the dynamic seal in the present application can simulate the environment of the generator in different water pressures and the installation environment of the dynamic seal 2. By detecting data such as the temperature of the dynamic seal 2, the leakage flow rate and leakage image at the seal gap, the sealing performance of the dynamic seal 2 can be judged, so as to judge whether the dynamic seal 2 meets the sealing requirements. After the sealing performance of the dynamic seal 2 meets the requirements, the dynamic seal 2 is then applied to the actual sealing environment, which can ensure that the dynamic seal 2 can meet the sealing requirements in the actual scenario, thereby improving the application safety of the generator.

[0070] In some embodiments, as Figure 2 shown, the sealing performance test device 1 of the dynamic seal further includes a protection member 17. The protection member 17 has a socket hole c coaxially arranged with the rotating shaft 13. The protection member 17 is sleeved on the rotating shaft 13 through the socket hole c, and the protection member 17 is located between the rotating shaft 13 and the dynamic seal 2.

[0071] It can be understood that since the dynamic seal 2 is at least partially located in the seal gap, and the protection member 17 is located between the rotating shaft 13 and the dynamic seal 2, the protection member 17 is partially located in the seal gap.

[0072] In some examples, parameters such as the material, processing technology, and roughness of the surface of the protection member 17 in contact with the dynamic seal 2 can be changed, so as to test the friction change between the rotating shaft 13 and the dynamic seal 2 through different parameter changes, thereby more accurately judging which dynamic seal 2 is more in line with the requirements.

[0073] In addition, a first sealing ring 207 can also be provided between the protection member 17 and the rotating shaft 13. Thus, the connection stability and sealing performance between the protection member 17 and the rotating shaft 13 are ensured, and the fluid medium in the inner cavity a is prevented from leaking through the gap between the protection member 17 and the rotating shaft 13.

[0074] Exemplarily, as Figure 4 、 Figure 5As shown, a first sealing groove 208 is formed in the protective member 17, and the first sealing ring 207 is disposed in the first sealing groove 208, so as to ensure the stability of the setting of the first sealing ring 207, thereby making the sealing effect between the protective member 17 and the rotating shaft 13 better.

[0075] Exemplarily, along the extending direction of the rotating shaft 13, two first sealing grooves 208 are arranged at intervals, and a first sealing ring 207 is provided in each first sealing groove 208, so as to achieve layer-by-layer sealing in the extending direction of the rotating shaft 13, thereby improving the sealing performance.

[0076] By providing the protective member 17, the dynamic seal 2 is sleeved outside the protective member 17 and sleeved on the rotating shaft 13 instead of directly sleeved on the rotating shaft 13. In this way, the rotating shaft 13 can be prevented from directly contacting the protective member 17, and the rotating shaft 13 can be prevented from contacting the dynamic seal 2 and wearing during rotation, thereby prolonging the service life of the rotating shaft 13, avoiding frequent replacement of the rotating shaft 13, and reducing the maintenance cost.

[0077] In some embodiments, as Figure 2 shown, the socket hole c is a blind hole, the first end of the rotating shaft 13 extends into the blind hole, and the first end of the rotating shaft 13 is fixed to the bottom surface of the blind hole.

[0078] In some examples, the rotating shaft 13 can be fixed to the protective member 17 by passing a fastener through the bottom wall of the blind hole and then connecting it to the rotating shaft 13. In this way, not only the connection strength can be ensured, but also it is convenient for disassembly. When the protective member 17 is worn and needs to be replaced, the protective member 17 can be removed for replacement.

[0079] Of course, the protective member 17 and the rotating shaft 13 can also be fixed by suitable means such as gluing or welding.

[0080] Through the above settings, the protective member 17 can be fixed to the first end of the rotating shaft 13 through the bottom surface of the blind hole. Such fixation can avoid affecting the peripheral wall of the protective member 17, thereby ensuring that the dynamic seal 2 can be stably arranged on the peripheral wall of the protective member 17 and ensuring that the dynamic seal 2 is not affected by the fixation of the dynamic seal 2 and the rotating shaft 13.

[0081] Of course, in some other examples, the socket hole c in the protective member 17 can also be a channel, that is, the socket hole c penetrates the protective member 17. In this way, the protective member 17 can also be sleeved on the rotating shaft 13 to achieve the protection of the rotating shaft 13.

[0082] In some embodiments, as Figure 2As shown, the sealing performance testing device 1 of the dynamic seal further includes at least one bearing 18. The bearing 18 is coaxially arranged with the rotating shaft 13, sleeved on the rotating shaft 13, the outer ring of the bearing 18 is connected to the sealing chamber 11, and the inner ring of the bearing 18 is connected to the rotating shaft 13.

[0083] It can be understood that the bearing 18 and the sealing chamber 11 can be directly connected or indirectly connected.

[0084] Among them, the bearing 18 can be an angular contact ball bearing, a thrust ball bearing, etc., and can be specifically selected according to needs.

[0085] In addition, the number of bearings 18 can be one, so that the number of bearings 18 can be reduced and the part cost can be lowered. Or, the number of bearings 18 can also be multiple, for example, the number of bearings 18 is two, three, four or five, etc. The multiple bearings 18 are arranged in sequence along the extending direction of the rotating shaft. In this way, each bearing 18 can provide support for the rotating shaft 13, and the strength of the support can be guaranteed.

[0086] Through the above settings, since the inner ring of the bearing 18 is connected to the rotating shaft 13, the setting of the bearing 18 does not affect the rotation of the rotating shaft 13. And since the bearing 18 is adjacent to the sealing chamber 11, the bearing 18 can support the rotating shaft 13 to ensure that the rotating shaft 13 can rotate stably and smoothly in the test hole b, and ensure the stability and accuracy of the test.

[0087] In some embodiments, the number of bearings 18 is two. The two bearings 18 include two angular contact ball bearings. Along the extending direction of the rotating shaft 13, the two angular contact ball bearings are arranged back to back. In this way, the angular contact ball bearings can provide greater rigid support to ensure the stability of the rotation of the rotating shaft 13. In addition, it can also effectively resist the overturning moment of the rotating shaft 13, thereby ensuring the setting stability of the rotating shaft 13. It should be explained that the two angular contact ball bearings being arranged back to back means that the wide sides of the two angular contact ball bearings are opposite.

[0088] In some embodiments, as Figure 2 shown, the sealing performance testing device 1 of the dynamic seal further includes a support member 19. The support member 19 is connected to the sealing chamber 11 and is located outside the inner cavity a. The support member 19 has a support channel d. The support channel d is coaxially arranged with the test hole b. The rotating shaft 13 passes through the support channel d to extend into the test hole b. The bearing 18 is arranged in the support channel d, and the outer ring of the bearing 18 is connected to the support member 19.

[0089] That is to say, the outer ring of the bearing 18 is connected to the sealing chamber 11 by being connected to the support member 19.

[0090] In some examples, as Figure 2As shown, the support member 19 includes a main body 191 and a cover plate 192. The support channel d is located on the main body 191. The cover plate 192 has a through hole e. The cover plate 192 covers the end of the support channel d away from the sealed cabin 11 and is connected to the main body 191. The through hole e is coaxially arranged with the support channel d. The rotating shaft 13 passes through the support channel d and the through hole e in sequence to extend into the detection hole.

[0091] There are two bearings 18, and the two bearings 18 include a first bearing 18A and a second bearing 18B. A shoulder 131 is provided on the circumferential surface of the rotating shaft 13, and an abutment portion 1911 is provided on the inner wall surface of the support channel d. The abutment portion 1911 is arranged along the circumferential direction of the rotating shaft 13. Along the extension direction of the support channel d, the abutment portion 1911 is arranged between the shoulder 131 and the cover plate 192, and is spaced apart from the shoulder 131 and the cover plate 192 respectively. The first bearing 18A abuts between the shoulder 131 and the abutment portion 1911, and the second bearing 18B abuts between the cover plate 192 and the abutment portion 1911. Such an arrangement can realize the installation and positioning of the first bearing 18A and the second bearing 18B, so as to facilitate the installation of the first bearing 18A and the second bearing 18B in appropriate positions, thereby ensuring the stability of the first bearing 18A and the second bearing 18B in supporting the rotating shaft 13.

[0092] Exemplarily, the first bearing 18A and the second bearing 18B are both angular contact ball bearings.

[0093] The cover plate 192 can be connected to the main body 191 by fasteners such as screws, and the main body 191 can be connected to the sealed cabin 11 by fasteners such as screws. The connection method of fasteners such as screws is more reliable and can be easily disassembled.

[0094] For example, Figure 2 , Figure 3 As shown, an oil retaining ring 200 is provided at the shaft shoulder 131, and the oil retaining ring 200 is sleeved on the shaft shoulder 131, and along the radial direction of the rotating shaft 13, the oil retaining ring 200 abuts between the shaft shoulder 131 and the inner wall surface of the support channel d. By providing the oil retaining ring 200, when the fluid medium penetrates into the support channel d through the sealing gap, the cooperation between the oil retaining ring 200 and the shaft shoulder 131 can prevent the fluid medium from further flowing in the direction away from the sealing cabin 11.

[0095] In addition, illustratively, Figure 2 As shown, a locking nut 201 is provided at the through hole e. The locking nut 201 is sleeved on the rotating shaft 13 and abuts against the cover plate 192 away from the bearing 18, so that the cover plate 192 can be stably fixed between the locking nut 201 and the main body 191, thereby ensuring the fixing stability of the cover plate 192.

[0096] With the above settings, the support member 19 can provide an installation position for the bearing 18, facilitating the installation and fixation of the bearing 18. Since the support member 19 is located outside the inner cavity a, the bearing 18 is also installed outside the inner cavity a. This not only saves space inside the inner cavity a but also prevents the bearing 18 from coming into contact with the fluid medium, avoiding erosion of the bearing 18 and thus extending its lifespan.

[0097] Of course, in some other examples, the bearing 18 can also be arranged inside the inner cavity a.

[0098] In some embodiments, as Figure 2 shown, along the axial direction of the rotating shaft 13, the end of the support member 19 close to the sealed cabin 11 is in close contact with the sealed cabin 11, and the sealing gap is within the surrounding range of the support channel d. The acquisition assembly 15 includes at least one of a first pressure sensor 206, a collection hole 151, a temperature sensor 152, and an image acquisition unit 153. The first pressure sensor 206 is arranged on the sealed cabin 11 for detecting the pressure value of the fluid medium inside the inner cavity a; the collection hole 151 is arranged on the lower side of the support member 19 and communicates with the support channel d, and the collection hole 151 is used for collecting the fluid medium seeping from the sealing gap; the temperature sensor 152 is connected to the sealed cabin 11 and is located at the sealing gap; the image acquisition unit 153 is connected inside the support channel d and faces the sealing gap.

[0099] In some examples, the first pressure sensor 206 can include a first pressure gauge. This can not only detect the pressure value of the fluid medium inside the inner cavity a but also clearly display the pressure value on the dial of the first pressure gauge, facilitating observation.

[0100] It can be understood that the smaller the difference between the initial pressure value of the first pressure sensor 206 and the pressure value detected after leakage occurs at the sealing gap, the better the sealing performance of the dynamic seal 2.

[0101] In some examples, the acquisition assembly 15 further includes a collection container. The collection hole 151 is a through hole, and the collection container is used for collecting the fluid medium flowing down from the collection hole 151, facilitating the measurement of the volume of the leaked fluid medium.

[0102] Among them, the temperature sensor 152 can be a contact-type temperature sensor 152. The contact-type temperature sensor 152 contacts the sealed cabin 11 to collect the temperature. For example, the contact-type temperature sensor 152 can be a thermistor or the like.

[0103] Of course, the temperature sensor 152 can also be a non-contact-type temperature sensor 152.

[0104] Exemplarily, the temperature sensor 152 can be an infrared temperature measurement sensor, and the infrared temperature measurement sensor can be integrated onto the image collector 153.

[0105] In addition, the image acquisition unit 153 can be a camera, a scanner, etc. The image acquisition unit 153 is installed in the support channel d and is located between the shoulder 131 and the seal chamber 11.

[0106] With the above settings, if leakage occurs at the seal gap, the pressure value in the inner cavity a will change. According to the amount of change in the pressure value, the sealing performance of the dynamic seal 2 can be indirectly judged. The fluid medium will flow out through the seal gap into the support channel d, and then through the collection hole 151, and the leaked fluid medium can be collected through the collection hole 151. Moreover, the temperature sensor 152 can also indirectly detect the temperature of the dynamic seal 2 by detecting the temperature of the seal chamber 11 at the seal gap. In addition, the image acquisition unit 153 can directly take pictures or record videos of the leakage picture at the seal gap. Thus, the sealing performance of the dynamic seal 2 can be judged based on the detection data of at least one of the first pressure sensor 206, the collection hole 151, the temperature sensor 152, and the image acquisition unit 153.

[0107] In some embodiments, as Figure 2 shown, the seal chamber 11 includes a chamber body 111 and an end cover 112. The chamber body 111 is formed with a fluid medium channel. Two ends of the fluid medium channel are respectively provided with end covers 112 and are connected to the chamber body 111 to form the inner cavity a; the test hole b is provided on the end cover 112, and the dynamic seal 2 is used to be fixed on the end cover 112.

[0108] Among them, the chamber body 111 and the end cover 112 can be connected by fasteners such as screws.

[0109] In addition, a first seal is provided between the chamber body 111 and the end cover 112. The first seal is used to seal the chamber body 111 and the end cover 112 to ensure the sealing performance of the connection between the chamber body 111 and the end cover 112, thereby ensuring the sealing performance of the inner cavity a.

[0110] In some examples, the support member 19 is connected to the end cover 112 where the test hole b is located. This can facilitate the connection between the support member 19 and the seal chamber 11.

[0111] With the above settings, the seal chamber 11 can be formed by the end cover 112 and the chamber body 111, which can facilitate the installation of the dynamic seal 2. Since the dynamic seal 2 is fixed on the end cover 112, along the extension direction of the fluid medium channel, the size of the dynamic seal 2 can be adjusted, for example, increasing the size of the dynamic seal 2 or reducing the size of the dynamic seal 2, so as to control the sealing effect of the dynamic seal 2, and thus detect the sealing performance of various different types and sizes of dynamic seals 2.

[0112] In some embodiments, as Figure 3 shown, the test device further includes a torque detection device 202. The torque detection device 202 is disposed between the output shaft of the driving assembly 14 and the second end of the rotating shaft 13. One end of the torque detection device 202 is connected to the output end of the output shaft through a first coupling 203, and the other end of the torque detection device 202 is connected to the second end of the rotating shaft 13 through a second coupling 204.

[0113] In this way, when the driving assembly 14 is used to drive the rotation of the rotating shaft 13, the driving force generated by the output shaft of the driving assembly 14 will pass through the torque detection device 202. In this way, the magnitude of the torque can be judged, and based on this, the state and leakage situation of the dynamic seal 2 under different rotational torques of the rotating shaft 13 can be judged, so as to quantitatively and more accurately detect the performance of the dynamic seal 2.

[0114] In some embodiments, as Figure 3 shown, the pressure regulating assembly 12 includes a booster pump 121, a liquid inlet pipe 122 and an overflow pipe 123. One end of the liquid inlet pipe 122 is communicated with the fluid medium outside the inner cavity a, the other end of the liquid inlet pipe 122 is communicated with the inner cavity a, and the booster pump 121 is disposed on the liquid inlet pipe 122. One end of the overflow pipe 123 is communicated with the inner cavity a, and the overflow pipe 123 can be shut off or conducted.

[0115] Wherein, the fluid medium outside the inner cavity a can be contained in a container 1305. The inlet end of the liquid inlet pipe 122 is communicated with the container 1305, and the outlet end of the overflow pipe is communicated with the container 1305. In this way, it is convenient for the storage, recovery and use of the fluid medium.

[0116] In some examples, the sealing cabin 11 has a first communication hole and a second communication hole. The first communication hole communicates the inner cavity a with the outside of the inner cavity a, and the second communication hole communicates the inner cavity a with the outside of the inner cavity a. The first communication hole is communicated with the outlet end of the liquid inlet pipe 122, and the second communication hole is communicated with the inlet end of the overflow pipe 123.

[0117] On this basis, in some examples, the pressure regulating assembly 12 further includes a first straight-through pipe 124 and a second straight-through pipe 125. The first straight-through pipe 124 is connected between the inlet end of the liquid inlet pipe 122 and the first communication hole, and the second straight-through pipe 125 is connected between the inlet end of the overflow pipe 123 and the second communication hole. The use of the first straight-through pipe 124 and the second straight-through pipe 125 can facilitate the connection between the pipeline and the sealing cabin 11, so that rapid installation and disassembly can be achieved.

[0118] In some examples, a check valve 129 is further provided on the liquid inlet pipe 122. The check valve 129 is disposed at the liquid outlet of the booster pump 121 to prevent the fluid medium from flowing back to the booster pump 121.

[0119] In some examples, control valves 130 are provided on both the liquid inlet pipe 122 and the overflow pipe 123, which are used to control the opening and closing of the liquid inlet pipe 122 and the overflow pipe 123 respectively to achieve intelligent control.

[0120] In some examples, the liquid inlet pipe 122 includes a first pipe section 1221 and a second pipe section 1222. The inlet end of the first pipe section 1221 is connected to the external fluid medium, and the outlet end of the first pipe section 1221 is connected to the inlet end of the second pipe section 1222. The outlet end of the second pipe section 1222 is connected to the inner cavity a. The booster pump 121 and the valve are located on the first pipe section 1221. The overflow pipe 123 includes a third pipe section 1231 and a fourth pipe section 1232. The inlet end of the third pipe section 1231 is connected to the inner cavity a, the outlet end of the third pipe section 1231 is connected to the inlet end of the fourth pipe section 1232, and the outlet end of the fourth pipe section 1232 is connected to the outside of the inner cavity a. The valve is located on the fourth pipe section 1232. A quick connector 1301 is connected between the outlet end of the first pipe section 1221 and the inlet end of the second pipe section 1222, and a quick connector 1301 is connected between the outlet end of the third pipe section 1231 and the inlet end of the fourth pipe section 1232.

[0121] Since the liquid inlet pipe 122 includes the first pipe section 1221 and the second pipe section 1222, it is possible to avoid an overly long pipe section, which is convenient for pipeline layout. The quick connector 1301 can achieve quick disassembly and assembly between the outlet end of the first pipe section 1221 and the inlet end of the second pipe section 1222. At the same time, the first pipe section 1221 and the second pipe section 1222 can be quickly disconnected through the quick connector 1301, so as to quickly discharge the fluid medium in the inner cavity a by using the second pipe section 1222. Similarly, since the overflow pipe includes the third pipe section 1231 and the fourth pipe section 1232, it is possible to avoid an overly long pipe section, which is convenient for pipeline layout. The quick connector 1301 can achieve quick disassembly and assembly between the outlet end of the third pipe section 1231 and the inlet end of the fourth pipe section 1232. At the same time, the third pipe section 1231 and the fourth pipe section 1232 can be quickly disconnected through the quick connector 1301, so as to quickly discharge the fluid medium in the inner cavity a by using the third pipe section 1231.

[0122] In some examples, the pressure regulating assembly 12 further includes a second pressure gauge 1302, a bypass pipeline 1303, and an overflow valve 1304. The inlet end of the bypass pipeline 1303 is communicated with the liquid inlet pipeline 122, and the outlet end of the bypass pipeline 1303 is communicated with the overflow valve 1304. The second pressure gauge 1302 is used to detect the pumping pressure of the booster pump 121. In this way, the fluid in the liquid inlet pipeline 122 will also enter the bypass pipeline 1303. When the pumping pressure of the booster pump 121 is too high, the overflow valve 1304 can be opened so that part of the fluid medium in the liquid inlet pipeline 122 is discharged through the bypass pipeline 1303, thereby improving the safety performance of the testing device.

[0123] With the above settings, the booster pump 121 can adjust the pressure of the fluid medium entering the inner cavity a, and the overflow pipeline 123 can overflow the excess fluid medium, so as to adjust the pressure of the fluid medium in the inner cavity a through boosting and pressure relief, and thus the sealing performance of the dynamic seal 2 under different pressure environments can be tested. Exemplarily, during use, the valves on the liquid inlet pipeline 122 and the overflow pipeline 123 are opened, and the booster pump 121 is started, so that the fluid medium inside the container 1305 enters the inner cavity a through the liquid inlet pipeline 122. The overflow pipeline 123 can discharge the pressure in the inner cavity a and, when the inner cavity a is filled with the fluid medium, discharge the excess fluid medium in the inner cavity a. After the inner cavity a is filled with the fluid medium, the valves on the liquid inlet pipeline 122 and the overflow pipeline 123 are closed, so that the fluid medium in the inner cavity a is maintained at an appropriate pressure value. After the experiment is completed, the first pipe section 1221 and the second pipe section 1222 can be disconnected through the quick connector 1301, and the third pipe section 1231 and the fourth pipe section 1232 can be disconnected, so as to quickly discharge the fluid medium in the inner cavity a by using the second pipe section 1222 and the third pipe section 1231.

[0124] In some embodiments, as Figure 2 shown, the pressure regulating assembly 12 further includes a first filter 126, a second filter 127, and a third filter 128. The first filter 126 is located in the liquid inlet pipeline 122 and before the liquid inlet of the booster pump 121. The second filter 127 is located on the liquid inlet pipeline 122 and between the liquid outlet of the booster pump 121 and the sealing chamber 11. The third filter 128 is arranged on the overflow pipeline 123.

[0125] Among them, the second filter 127 can be arranged on the second pipe section 1222 or can also be arranged on the first pipe section 1221. The third filter 128 can be arranged on the third pipe section 1231 or can also be arranged on the fourth pipe section 1232.

[0126] With the above settings, the first filter 126 can prevent debris from entering the booster pump 121, thus ensuring the normal operation of the booster pump 121. The second filter 127 can prevent debris from entering the inner cavity a, and the third filter 128 can filter the debris in the overflow pipe 123 to prevent the overflow pipe 123 from being blocked.

[0127] In some embodiments, as Figure 1 shown, the dynamic seal performance testing device 1 in the present application further includes a control module 205. The control module 205 is electrically connected to the driving component 14, the torque detection device 202, the image acquisition unit 153, and the temperature sensor 152 through control lines respectively to achieve control and data acquisition and monitoring.

[0128] On this basis, the present application further provides a dynamic seal performance testing system 01, including a dynamic seal 2 and a dynamic seal performance testing device 1. The dynamic seal 2 is connected to the seal chamber 11 and at least partially located in the seal gap to seal the seal gap.

[0129] The present application further provides a specific dynamic seal 2. The dynamic seal 2 can be applicable to the environment in water, and the dynamic seal performance testing device 1 in the present application can be used to detect the seal performance of the dynamic seal 2.

[0130] In some embodiments, as Figure 4 、 Figure 5 shown, the dynamic seal 2 includes a first seal portion 21 and a second seal portion 22. The first seal portion 21 is disposed in the seal gap and fixed to the seal chamber 11. The second seal portion 22 is disposed in the inner cavity a, sleeved on the rotating shaft 13, and fixed to the seal chamber 11. Along the axial direction of the rotating shaft 13, the second seal portion 22 at least partially shields the seal gap.

[0131] In some examples, the first seal portion 21 can be installed with lip seals of types including lip seals with a metal frame, rotating lip seals of thermoplastic materials, or rotating lip seals of elastic materials. The types of seals installed on the second seal portion 22 and the first seal portion 21 can be the same, or the second seal portion 22 can also be installed with a mechanical seal with a spring and a sealing surface perpendicular to the axis of the rotating shaft 13. According to the differences between the first seal unit 222 and the second dynamic seal unit 224, the fixed base of the second seal portion 22 can be designed as the first fixed base 221 and the second fixed base 223. The types of the first seal portion 21 and the second seal portion 22 are diverse, and various types of dynamic seals can be verified according to the actual working conditions of the tidal current energy generator.

[0132] With the above settings, the first sealing portion 21 is directly located within the sealing gap to block the sealing gap, and the second sealing portion 22 is located inside the sealing gap to block the sealing gap. The cooperation of the two achieves better sealing of the sealing gap.

[0133] In some embodiments, such as Figure 4 As shown, when the first sealing unit 222 in which the second sealing portion 22 is installed is a lip seal ring, the second sealing portion 22 has a structure including a first fixing base 221 and a first sealing unit 222. The first fixing base 221 is fixed to the sealing chamber 11 and is arranged along the circumferential direction of the rotating shaft 13. The inner wall surface of the first fixing base 221 facing the rotating shaft 13 has a mounting groove g, and the mounting groove g is arranged along the circumferential direction of the rotating shaft 13. The first sealing unit 222 is arranged in the mounting groove g, and the sealing lip of the first sealing unit 222 is in contact with the rotating shaft 13 for sealing.

[0134] It can be understood that when a protective member 17 is sleeved on the rotating shaft 13, the sealing lip of the first sealing unit 222 is in contact with the protective member 17 for sealing, that is, indirectly in contact with the rotating shaft 13.

[0135] In some examples, the lip seal rings in the first sealing portion 21 and the second sealing portion 22 can be installed in a normal or reverse manner and combined in different numbers according to application requirements to meet different sealing performance requirements.

[0136] In some examples, the first fixing base 221 includes a bearing seat 2211 and a pressing plate 2212. The bearing seat 2211 is connected to the sealing chamber 11. A plurality of second sealing grooves 210 are formed on the mounting surface of the bearing seat 2211 and the sealing chamber 11. The second sealing grooves 210 are arranged around the axis of the rotating shaft 13. A second sealing ring 209 is arranged in the second sealing grooves 210, and the second sealing ring 209 seals the mounting surface to prevent fluid medium from seeping in. The pressing plate 2212 is connected to the side of the bearing seat 2211 away from the sealing gap and is detachably connected to the bearing seat 2211, and an installation groove g is formed between the pressing plate 2212 and the bearing seat 2211. This can facilitate the installation and disassembly of the first sealing unit 222. And along the axial direction of the rotating shaft 13, the size of the installation groove can be adjusted to adjust the number of the first sealing units 222 installed, so as to adjust the sealing performance of the second sealing portion 22.

[0137] With the above settings, the first sealing unit 222 is located in the mounting groove g. Since the first fixing base 221 is fixed to the sealing chamber 11, the first fixing base 221 can limit the first sealing unit 222 in the mounting groove g, thereby ensuring the sealing performance of the first sealing unit 222.

[0138] In some other embodiments, such as Figure 5As shown, when the second sealing unit 224 installed in the second sealing portion 22 is a mechanical seal, the second sealing portion 22 includes a second fixed base 223 and a second sealing unit 224. The second fixed base 223 is fixed to the sealing chamber 11 and is arranged circumferentially along the rotation axis 13. The second sealing unit 224 includes a stationary seal body 2241, a rotating seal body 2242, and an elastic body 2243. The stationary seal body 2241 is arranged circumferentially along the rotation axis 13, is disposed between the second fixed base 223 and the rotation axis 13, and is fixed to the second fixed base 223. The rotating seal body 2242 is arranged circumferentially along the rotation axis 13 to sleeved on the rotation axis 13. Along the axial direction of the rotation axis 13, the rotating seal body 2242 is disposed on the side of the stationary seal body 2241 away from the sealing gap and contacts the stationary seal body 2241 to form a sealing surface h, and the elastic body 2243 presses the sealing surface h tightly.

[0139] Wherein, the second sealing unit 224 is a mechanical seal including at least one vertical sealing surface h, and the elastic body 2243 can be various elements with a pre-tightening effect such as a spring, a bellows, etc.

[0140] In some examples, as Figure 5 shown, a plurality of second sealing grooves 210 are formed on the installation surface of the second fixed base 223 and the sealing chamber 11. The second sealing grooves 210 are arranged to surround the axis of the rotation axis 13. A second sealing ring 209 is disposed in the second sealing grooves 210, and the second sealing ring 209 seals the installation surface to prevent fluid medium from infiltrating.

[0141] In some examples, as Figure 5 shown, the rotating seal body 2242 includes a guide frame k1 and a sealing body k2. The guide frame k1 is sleeved on the rotation axis 13. The guide frame k1 has a guide channel k11 extending along the axial direction of the rotation axis 13. A part of the sealing body k2 is located in the guide channel k11. One end of the elastic body 2243 is connected to the guide frame k1, and the other end of the elastic body 2243 is connected to the sealing body k2. The sealing body k2 is located between the elastic body 2243 and the stationary seal body 2241 and contacts the stationary seal body 2241 to form a sealing surface h, and the elastic body 2243 is in a compressed state.

[0142] With such an arrangement, the guide frame k1 can provide a thrust for the sealing body k2 to approach the stationary seal body 2241 through the elastic body 2243, so that the sealing surface h formed by the contact between the sealing body k2 and the stationary seal body 2241 is pressed tightly, thus ensuring close contact between the stationary seal body 2241 and the sealing body k2 and ensuring the sealing effect.

[0143] Exemplarily, a third sealing groove 2102 may also be formed on the sealing body k2. The third sealing groove 2102 is arranged around the rotation axis 13. A third sealing ring 2101 is arranged in the third sealing groove 2102. The third sealing groove 2102 provides an installation position for the third sealing ring 2101, and the third sealing ring 2101 seals the sealing body k2 and the rotation axis 13, thereby preventing fluid medium from leaking.

[0144] In some examples, a fourth sealing groove may also be arranged between the static sealing body 2241 and the second fixed base 223. The fourth sealing groove is arranged around the axis of the rotation axis, and a fourth sealing ring is arranged in the fourth sealing groove. This ensures the sealing performance between the static sealing body 2241 and the second fixed base 223 and prevents fluid medium from leaking.

[0145] Through the above arrangement, the second fixed base 223 provides a fixed position for the static sealing body 2241 and fixes the static sealing body 2241. Meanwhile, the dynamic sealing body 2242 is fixed to the rotation axis 13 through a fastener. The elastic body 2243 is installed in the dynamic sealing body 2242 and presses a part of it against the static sealing body 2241 to form a sealing surface h. Thus, when the rotation axis 13 rotates, the dynamic sealing body 2242 and the elastic body 2243 rotate with the rotation axis 13. The dynamic sealing body 2242 and the static sealing body 2241 move relative to each other and rub against each other at the sealing surface h, thereby achieving sealing.

[0146] For a clearer understanding of the assembly process of the dynamic seal performance testing device 1 in the present application and the testing process of the dynamic seal 2, in the following specific example, in combination with Figures 1 - 5 , the dynamic seal performance testing device 1 in the present application will be introduced.

[0147] In the initial state, structures such as the main body part 191, the abutting part 1911, the cover plate 192, the first bearing 18A, the second bearing 18B, the oil retaining ring 200, the cabin body 111, and the end cover 112 are all in a separated state. During assembly, first, the first bearing 18A is installed at the shaft shoulder 131 on the left side of the rotation axis 13, and the rotation axis 13 is installed in the support channel d of the main body part 191. The bearing 18A is installed on the side of the abutting part 1911 close to the sealing cabin 11. Then, the oil retaining ring 200 is installed on the shaft shoulder 131. Next, the second bearing 18B is installed on the side of the abutting part 1911 facing away from the first bearing 18A, and the cover plate 192 and the locking nut 201 are installed on the side of the second bearing 18B away from the abutting part 1911 and connected to the main body part 191. Then, the protection part 17 is installed on the rotation axis 13, and the image acquisition unit 153 is installed in the support channel d.

[0148] Next, install the dynamic seal 2 to be detected on the end cover 112 with a detection hole, and make at least part of the dynamic seal 2 located within the sealing gap. Then, install the temperature sensor 152 on the end cover 112 with the detection hole. Finally, install the entire rotating shaft 13 and the protective member 17 into the detection hole, and install the end cover 112 to the cabin body 111 to complete the assembly.

[0149] After placing the sealing cabin 11, the rotating shaft 13, and the support member 19 as a whole on the carrier table 16, assemble the torque sensor and the drive assembly 14, as well as the pressure regulating assembly 12. Finally, electrically connect the drive assembly 14, the torque detection device 202, the temperature sensor 152, and the image acquisition unit 153 to the control module respectively.

[0150] After completing the assembly of the sealing performance test system 01 for the dynamic seal, start the booster pump 121 to fill the fluid medium into the inner cavity a. Then, start the drive assembly 14 to drive the rotation of the rotating shaft 13 for detection. After the detection is completed, drain the fluid medium, and collect the values of the torque detection device 202, the temperature sensor 152, and the image acquisition unit 153. Detect the appearance, surface roughness, profile, etc. of the protective member 17, and detect the appearance, wear trace size, friction loss mass, etc. of the dynamic seal 2 to evaluate the sealing performance of the dynamic seal 2.

[0151] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A sealing performance testing device for dynamic sealing, characterized in that, Comprising: A sealed chamber having an inner cavity and a test hole communicating with the inner cavity; A pressure regulating assembly for regulating the pressure of the fluid medium in the inner cavity; A rotating shaft, the first end of the rotating shaft passes through the test hole and extends into the inner cavity, the rotating shaft can rotate relative to the sealed chamber about its axis, there is a sealing gap between the peripheral wall surface of the rotating shaft and the inner wall surface of the test hole, the rotating shaft is used for sleeving the dynamic seal, and the dynamic seal is used for at least partially located in the sealing gap; A driving assembly for driving the rotating shaft to rotate; A collecting assembly for collecting at least one of the pressure value of the fluid medium in the inner cavity, the temperature of the sealed chamber at the sealing gap, the leakage image of the sealing gap, the leakage amount, and the frictional torque of the dynamic seal to obtain the sealing performance of the dynamic seal.

2. The sealing performance testing device for dynamic seal according to claim 1, characterized in that Further comprising: A protection member having a socket hole coaxially arranged with the rotating shaft, the protection member is sleeved on the rotating shaft through the socket hole, and the protection member is located between the rotating shaft and the dynamic seal.

3. The sealing performance testing device for dynamic seal according to claim 2, characterized in that, The socket hole is a blind hole, the first end of the rotating shaft extends into the blind hole, and the first end of the rotating shaft is fixed to the bottom surface of the blind hole.

4. The sealing performance test device for dynamic seal according to claim 1, characterized in that, Further comprising: At least one bearing, the bearing is coaxially arranged with the rotating shaft and sleeved on the rotating shaft, and the outer ring of the bearing is connected to the sealed chamber, and the inner ring of the bearing is connected to the rotating shaft.

5. The sealing performance testing device for dynamic seal according to claim 4, characterized in that, The number of the bearings is two, and the two bearings include two angular contact ball bearings, and along the extending direction of the rotating shaft, the two angular contact ball bearings are arranged back to back.

6. The sealing performance testing device for dynamic sealing according to claim 4, characterized in that Further comprising a support member connected to the sealed chamber and located outside the inner cavity, the support member has a support channel coaxially arranged with the test hole, the rotating shaft passes through the support channel to extend into the test hole, the bearing is arranged in the support channel, and the outer ring of the bearing is connected to the support member.

7. The sealing performance testing device for dynamic seal according to claim 6, characterized in that, Along the axial direction of the rotating shaft, the end of the support member close to the sealed chamber is in close contact with the sealed chamber, and the sealing gap is located within the surrounding range of the support channel; the collecting assembly includes at least one of a first pressure sensor, a collecting hole, a temperature sensor, and an image acquisition unit; The first pressure sensor is arranged on the sealed chamber for detecting the pressure value of the fluid medium in the inner cavity; the collecting hole is arranged on the lower side of the support member and communicates with the support channel, and the collecting hole is used for collecting the fluid medium permeated from the sealing gap; the temperature sensor is connected to the sealed chamber and is located at the sealing gap; the image acquisition unit is connected in the support channel and faces the sealing gap.

8. The sealing performance testing device for dynamic sealing according to any one of claims 1 to 7, characterized in that, The collecting assembly further includes a torque detection device, the torque detection device is arranged between the output shaft of the driving assembly and the second end of the rotating shaft, and one end of the torque detection device is connected to the output end of the output shaft through a first coupling, and the other end of the torque detection device is connected to the second end of the rotating shaft through a second coupling.

9. The sealing performance test device for dynamic seal according to any one of claims 1 to 7, characterized in that The sealed chamber includes: a chamber body and an end cover. The chamber body is formed with a fluid medium passage. The two end portions of the fluid medium passage are respectively provided with the end cover and are connected to the chamber body to form the inner cavity. The test hole is provided on the end cover, and the dynamic seal is used to be fixed on the end cover.

10. The sealing performance testing device for dynamic seal according to any one of claims 1 to 7, characterized in that The pressure regulating assembly includes: a booster pump, a liquid inlet pipe and an overflow pipe. One end of the liquid inlet pipe is communicated with the fluid medium outside the inner cavity, the other end of the liquid inlet pipe is communicated with the inner cavity, and the booster pump is arranged on the liquid inlet pipe. One end of the overflow pipe is communicated with the inner cavity, and the overflow pipe can be shut off or conducted.

11. The sealing performance testing device for dynamic seal according to claim 10, characterized in that, The pressure regulating assembly further includes: a first filter, a second filter and a third filter. The first filter is located in the liquid inlet pipe and before the liquid inlet of the booster pump. The second filter is located on the liquid inlet pipe and between the liquid outlet of the booster pump and the sealed chamber. The third filter is arranged on the overflow pipe.

12. A sealing performance test system for dynamic sealing, characterized in that, Includes: A dynamic seal and a performance test device for the dynamic seal according to any one of claims 1 to 11. The dynamic seal is connected to the sealed chamber and at least partially located in the seal gap to seal the seal gap.

13. The sealing performance test system for dynamic seal according to claim 12, characterized in that, The dynamic seal includes: a first seal part and a second seal part. The first seal part is arranged in the seal gap and fixed to the sealed chamber. The second seal part is arranged in the inner cavity, sleeved on the rotating shaft, and fixed to the sealed chamber. Along the axial direction of the rotating shaft, the second seal part at least partially shields the seal gap.

14. The seal performance test system for the dynamic seal according to claim 13, wherein The second seal part includes: a first fixed base and a first seal unit. The first fixed base is fixed to the sealed chamber and arranged along the circumferential direction of the rotating shaft. The inner wall surface of the first fixed base facing the rotating shaft has a mounting groove, and the mounting groove is arranged along the circumferential direction of the rotating shaft. The first seal unit is arranged in the mounting groove, and the sealing lip of the first seal unit contacts and seals the rotating shaft. Or, The second seal part includes: a second fixed base and a second seal unit. The second fixed base is fixed to the sealed chamber and arranged along the circumferential direction of the rotating shaft. The second seal unit includes a static seal body, a dynamic seal body and an elastic body. The static seal body is arranged along the circumferential direction of the rotating shaft and is arranged between the second fixed base and the rotating shaft and fixed to the second fixed base. The dynamic seal body is arranged along the circumferential direction of the rotating shaft to be sleeved on the rotating shaft. Along the axial direction of the rotating shaft, the dynamic seal body is arranged on the side of the static seal body away from the seal gap and contacts the static seal body to form a sealing surface, and the elastic body presses the sealing surface.

Images