Large-scale dynamic seal test device

Abstract

The invention provides a large-scale dynamic seal test device, which comprises a bearing positioning assembly, a power driving assembly, a matching bearing assembly, a pivoting transmission assembly, a sealing containing assembly, a rotation simulation assembly and a pressure measurement and control assembly, and has high flexibility, reliability and accuracy, the test efficiency is improved, the installation and the maintenance are convenient, and the test efficiency is improved. And comprehensive test capability and traceable test data are provided, and powerful support is provided for product research and development and quality control of enterprises.

Description

Technical Field

[0001] The sealing element testing equipment of the present invention, in particular relates to a large-scale dynamic sealing test device. Background Art

[0002] The large-scale combined dynamic sealing test device can be used to test and verify the sealing performance and actual leakage measurement of various dynamic sealing elements and dynamic sealing combinations under simulated actual working conditions. By simulating different working conditions such as pressure, temperature, and speed, the reliability and leakage rate of different dynamic seals and dynamic seal combinations under different rotational speed conditions and sealing gas charging states can be evaluated, ensuring the sealing effect in actual applications. Through the analysis of test results, the deficiencies in the design of dynamic sealing elements and dynamic seal combinations can be found, and improvements and optimizations can be made, providing references for the design of new sealing elements and different dynamic seal combinations. For some key application fields, such as aerospace, petrochemical, nuclear industry, large wind tunnels, etc., the quality and low leakage rate of dynamic sealing elements and dynamic seal combinations are crucial. By conducting large-scale dynamic sealing tests, the quality of products can be ensured to meet the requirements of leakage rate and reliability.

[0003] Patent document CN216116591U discloses a sealing test device for sealing elements, which includes a base, an outer sleeve provided on the base and having a gas storage cavity, a rotating shaft with one end extending into the gas storage cavity and connected to the outer sleeve, a static sealing structure installed on the outer sleeve, and a pressing structure installed on the rotating shaft and located in the gas storage cavity. The test device is provided with a pressing structure, and the pressing structure provides an outward thrust to the sealing element, thereby simulating the pressure exerted on the sealing element during operation, making the test environment more similar to the working environment of the sealing element, and better detecting the sealing performance of the sealing element. Summary of the Invention

[0004] The purpose of the present invention is to provide a large-scale dynamic sealing test device to enhance the flexibility of the test process.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A large-scale dynamic sealing test device, which includes:

[0007] A bearing and positioning assembly, which has an assembly space therein;

[0008] A power driving and rotating assembly, which is installed in the bearing and positioning assembly and can operate in the bearing and positioning assembly;

[0009] A mating and rotating assembly, which is installed in the bearing and positioning assembly and corresponds to the power driving and rotating assembly in position, and has a rotating space therein;

[0010] A pivot drive assembly, which is installed in a mating rotation and bearing assembly, engages with a power drive and rotation assembly, and is rotated by the power drive and rotation assembly in the mating rotation and bearing assembly;

[0011] A sealed containment assembly, which is installed in the mating rotation and bearing assembly, cooperates with the pivot drive assembly, and has a containment space inside for accommodating a seal to be tested;

[0012] A rotation simulation assembly, which is located in the sealed containment assembly, engages with the pivot drive assembly, and cooperates with the seal to be tested, forming a mutually isolated sealed cavity among the rotation simulation assembly, the sealed containment assembly, and the seal to be tested, and is driven by the pivot drive assembly to operate in the sealed containment assembly;

[0013] A pressure measurement and control assembly, which engages with the sealed containment assembly and is connected to the sealed cavity, controls the pressure state in the sealed cavity by the pressure measurement and control assembly, and measures the sealing performance of the seal to be tested.

[0014] Specifically, the bearing and positioning assembly includes:

[0015] A bearing base, which is arranged horizontally and forms an assembly space at its top.

[0016] The power drive and rotation assembly includes:

[0017] A drive motor, which is a variable-frequency motor and is installed on the top of the bearing base through a connecting member.

[0018] The mating rotation and bearing assembly includes:

[0019] A rotation and bearing box body, which is installed on the top of the bearing base through a connecting member and corresponds to the position of the drive motor, and forms a rotation and bearing space inside.

[0020] The pivot drive assembly includes:

[0021] A transmission main shaft, which is installed in the rotation and bearing box body through a bearing and can rotate in the rotation and bearing box body. Its inner end engages with the power output shaft of the drive motor through a coupling, and is driven by the drive motor to rotate.

[0022] The sealed containment assembly includes:

[0023] A sealed housing cover, which is installed on the rotation and bearing box body and corresponds to the position of the transmission main shaft. The outer end of the transmission main shaft extends into the interior of the rotation and bearing box body. A pair of positioning notches are provided on the inner wall of the rotation and bearing box body. Each positioning notch extends along the circumferential direction of the rotation and bearing box body and is arranged sequentially along the axial direction of the rotation and bearing box body. The seal to be tested can be installed in the positioning notches.

[0024] The rotation simulation assembly includes:

[0025] Rotate the core tube, which is located in the sealed housing cover and whose outer wall fits against the seal to be tested in the positioning recess. The middle part of the rotating core tube has a transfer core plate, which divides the rotating core tube into two parts. An inner-end sealing cavity is formed between the inner axial side of the transfer core plate, the inner end of the sealed housing cover and the inner-end seal to be tested. An outer-end sealing cavity is formed between the outer axial side of the transfer core plate, the outer end of the sealed housing cover and the outer-end seal to be tested. A peripheral sealing cavity is formed between the outer wall of the sealed housing cover, the side wall of the sealed housing cover, the inner-end seal to be tested and the outer-end seal to be tested.

[0026] The pressure measurement and control assembly includes:

[0027] The measurement and control pipeline is connected to the gas source and is respectively connected to the inner-end sealing cavity, the outer-end sealing cavity and the peripheral sealing cavity. The pressure state in the inner-end sealing cavity, the outer-end sealing cavity and the peripheral sealing cavity is controlled by the measurement and control pipeline, and the sealing performance of the seal to be tested is measured.

[0028] The advantages of the present invention are as follows:

[0029] 1. High modularity and flexibility: The sealing test bench adopts a modular structure form and can be used in combination with turntables of different sizes according to different test requirements. This makes the equipment highly flexible and adaptable, and can meet various different sealing test requirements.

[0030] 2. Reliable test results: The sealing test bench is equipped with a pressure control system and a detection system, which can precisely control the pressure in the test bench, monitor the pressure change in real time and record the test data. This ensures the accuracy and reliability of the test results and helps enterprises better understand the performance and quality of products.

[0031] 3. Efficient test process: The power system of the sealing test bench includes a bearing lubrication system and a frequency conversion regulation system, which can withstand the axial force brought by the test cavity under the conditions of pressurization or vacuum, ensuring that the dynamic sealing test bench can operate safely and stably for a long time. At the same time, the frequency conversion regulation system can precisely control the rotation speed of the dynamic seal test. This improves the test efficiency, enabling enterprises to complete a large number of sealing tests in a short time.

[0032] 4. Convenient installation and maintenance: The dynamic seal installation device includes adjustable jigs and fixing devices, which can adapt to seals of different sizes and shapes, facilitating installation and maintenance. At the same time, since each module is easy to disassemble, install and repair, the maintenance and management of the equipment become more convenient.

[0033] 5. Comprehensive testing capabilities: The sealing test bench can not only conduct tests under pressurized and negative pressure conditions at various linear speeds, but also perform sealing leakage detection tests with the sealing gas inflated or closed. This enables the equipment to have comprehensive testing capabilities and meet various different sealing test requirements.

[0034] 6. Traceable test data: Since the detection system can monitor pressure changes in real time and record test data, enterprises can trace and analyze the test results. This helps enterprises better understand the performance and quality of products, promptly discover and solve problems, and ensure the quality stability and reliability of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural diagram of the large dynamic sealing test device proposed by the present invention;

[0036] Figure 2 is a schematic partial structural diagram of the test device;

[0037] Figure 3 is Figure 2 a partial enlarged view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] Such as Figures 1 to 3As shown in the figure, the large dynamic seal test device proposed by the present invention includes a bearing and positioning assembly, a power driving and rotating assembly, a mating and rotating assembly, a pivot transmission assembly, a seal accommodating assembly, a rotation simulation assembly, and a pressure measurement and control assembly. There is an assembly space in the bearing and positioning assembly. The power driving and rotating assembly is installed in the bearing and positioning assembly and can operate in the bearing and positioning assembly. The mating and rotating assembly is installed in the bearing and positioning assembly and corresponds to the position of the power driving and rotating assembly. There is a rotating space inside it. The pivot transmission assembly is installed in the mating and rotating assembly and engages with the power driving and rotating assembly. The power driving and rotating assembly rotates in the mating and rotating assembly. The seal accommodating assembly is installed in the mating and rotating assembly and cooperates with the pivot transmission assembly. There is a bearing space inside it for accommodating the seal to be tested. The rotation simulation assembly is located in the seal accommodating assembly. It engages with the pivot transmission assembly and cooperates with the seal to be tested, forming a mutually isolated seal cavity between the rotation simulation assembly, the seal accommodating assembly, and the seal to be tested. The pivot transmission assembly drives the rotation simulation assembly to operate in the seal accommodating assembly. The pressure measurement and control assembly engages with the seal accommodating assembly and communicates with the seal cavity. The pressure measurement and control assembly controls the pressure state in the seal cavity and measures the sealing performance of the seal to be tested.

[0040] In this embodiment, the bearing and positioning assembly includes a bearing base 100. The bearing base is arranged horizontally, and an assembly space is formed at its top.

[0041] The power driving and rotating assembly includes a driving motor 200. The driving motor is a variable-frequency motor and is installed on the top of the bearing base through a connecting piece.

[0042] The mating and rotating assembly includes a rotating box body 300. The rotating box body is installed on the top of the bearing base through a connecting piece and corresponds to the position of the driving motor. A rotating space is formed inside it.

[0043] The pivot transmission assembly includes a transmission main shaft 400. The transmission main shaft is installed in the rotating box body through a bearing and can rotate in the rotating box body. Its inner end engages with the power output shaft of the driving motor through a coupling, and the driving motor drives the transmission main shaft to rotate.

[0044] The seal accommodating assembly includes a seal housing 500. The seal housing is installed on the rotating box body and corresponds to the position of the transmission main shaft. The outer end of the transmission main shaft extends into the interior of the rotating box body. A pair of positioning notches are formed on the inner wall of the rotating box body. Each positioning notch extends along the circumferential direction of the rotating box body and is arranged sequentially along the axial direction of the rotating box body. The seal to be tested can be installed in the positioning notches.

[0045] The rotation simulation assembly includes a rotating core tube 600. The rotating core tube is located in a sealed housing cover, and its outer wall is in contact with the seal to be tested in the positioning recess. The middle part of the rotating core tube has a transfer core plate 610, which divides the rotating core tube into two parts. An inner end sealing cavity A is formed between the axial inner side of the transfer core plate, the inner end of the sealed housing cover, and the seal to be tested at the inner end. An outer end sealing cavity B is formed between the axial outer side of the transfer core plate, the outer end of the sealed housing cover, and the seal to be tested at the outer end. A peripheral sealing cavity C is formed between the outer wall of the sealed housing cover, the side wall of the sealed housing cover, the seal to be tested at the inner end, and the seal to be tested at the outer end.

[0046] The pressure measurement and control assembly includes a measurement and control pipeline 700. The measurement and control pipeline is connected to a gas source and is respectively connected to the inner end sealing cavity, the outer end sealing cavity, and the peripheral sealing cavity. The pressure states in the inner end sealing cavity, the outer end sealing cavity, and the peripheral sealing cavity are controlled by the measurement and control pipeline, and the sealing performance of the seal to be tested is measured.

[0047] In the description of the present invention, it should be noted that when terms indicating orientation or positional relationships such as "upper", "lower", "inner", "outer", "left", "right", etc. appear, they should be understood based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the product of the present invention is usually placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention. In addition, when terms such as "first", "second", etc. appear, they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A large dynamic seal test device, characterized in that: include: A load-bearing and positioning component, wherein the load-bearing and positioning component has an assembly space; A power-driven rotating assembly, which is installed in the load-bearing and positioning assembly and can operate in the load-bearing and positioning assembly; A matching and transfer assembly is installed in the load-bearing and positioning assembly and corresponds to the position of the power-driven transfer assembly, and has a transfer space inside; A pivot transmission assembly is installed in the matching and rotating assembly and is engaged with the power-driven rotating assembly, and the power-driven rotating assembly rotates in the matching and rotating assembly; A sealing and loading component is installed in the matching and rotating component and cooperates with the pivoting transmission component, and has a load-bearing space inside for accommodating the seal to be tested; A rotation simulation component is located in the sealing container component, is engaged with the pivot transmission component, and cooperates with the seal to be tested, so that a mutually isolated sealed cavity is formed between the rotation simulation component, the sealing container component, and the seal to be tested, and the rotation simulation component is driven by the pivot transmission component to run in the sealing container component; A pressure measurement and control component is connected to the sealing capacity component and communicated with the sealing cavity. The pressure measurement and control component controls the pressure state in the sealing cavity and measures the sealing performance of the sealing component to be tested.

2. A large-scale dynamic seal test device according to claim 1, characterized in that: The load-bearing positioning components include: The carrying base is arranged in the transverse direction and forms an assembly space on the top thereof.

3. A large-scale dynamic seal test device according to claim 2, characterized in that: The power drive assembly includes: The driving motor is a variable frequency motor and is installed on the top of the bearing base through a connecting piece.

4. A large-scale dynamic seal test device according to claim 3, characterized in that: The matching transfer components include: The transfer box is installed on the top of the bearing base through a connecting piece and corresponds to the position of the driving motor, forming a transfer space inside the box.

5. A large-scale dynamic seal test device according to claim 4, characterized in that: The pivot drive assembly includes: The transmission main shaft is installed in the bearing housing through bearings and can rotate in the bearing housing. Its inner end is connected with the power output shaft of the driving motor through a coupling, and the driving motor drives the transmission main shaft to rotate.

6. A large-scale dynamic seal test device according to claim 5, characterized in that: The sealed containment assembly includes: A sealing shell cover is installed on the bearing housing and corresponds to the position of the transmission main shaft. The outer end of the transmission main shaft extends into the bearing housing. A pair of positioning recesses are provided on the inner wall of the bearing housing. Each positioning recess extends along the circumference of the bearing housing and is arranged sequentially along the axial direction of the bearing housing. The seal to be tested can be installed in the positioning recess.

7. A large-scale dynamic seal test device according to claim 6, characterized in that: The rotation simulation components include: A rotating core tube is located in the sealing shell cover, and its outer wall is fitted with the seal to be tested in the positioning recess. A transfer core plate is provided in the middle of the rotating core tube, and the rotating core tube is divided into two parts by the transfer core plate. An inner end sealing cavity is formed between the axial inner side of the transfer core plate, the inner end of the sealing shell cover and the inner end seal to be tested, an outer end sealing cavity is formed between the axial outer side of the transfer core plate, the outer end of the sealing shell cover and the outer end seal to be tested, and a peripheral sealing cavity is formed between the outer wall of the sealing shell cover, the side wall of the sealing shell cover, the inner end seal to be tested and the outer end seal to be tested.

8. A large-scale dynamic seal test device according to claim 7, characterized in that: The pressure measurement and control components include: The measuring and controlling pipeline is connected with the gas source and is respectively connected with the inner sealing cavity, the outer sealing cavity and the peripheral sealing cavity. The measuring and controlling pipeline controls the pressure state in the inner sealing cavity, the outer sealing cavity and the peripheral sealing cavity, and measures the sealing performance of the sealing component to be tested.

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