A vertical low-speed high-pressure seal test bench

Abstract

The utility model relates to the technical field of sealing test, and disclose a vertical low -speed high -pressure sealing test board, including support, the top of support is equipped with test box, is equipped with test cavity in test box, the top of test box is equipped with the transition joint plate, and the transition joint plate is equipped with the opening that passes through and is connected with test cavity in, is installed on the support and passes through test box, the transmission shaft of transition joint plate and the drive part of driveing its rotation, be provided with the auxiliary sealing assembly of casing in test box on transmission shaft. The utility model proposes a vertical low -speed high -pressure sealing test board, through simulating the rotation and injection test medium under the working condition, detect the sealing performance when mechanical sealing piece dynamic operation, set up auxiliary sealing assembly, prevent test medium along transmission shaft downward leakage, adopt the elastic sealing piece that is composed of sealing seat, spring and rubber ring, form axial dynamic seal, ensure that test result is accurate and process safety.

Description

Technical Field

[0001] This utility model relates to the field of sealing test technology, and in particular to a vertical low-speed high-pressure sealing test bench. Background Technology

[0002] Mechanical seals for agitators are core components that ensure the safe operation of agitation equipment. Their applications cover multiple industries, including chemical (reactors, polymerization reactors, distillation towers), pharmaceutical (bioreactors, fermenters), food processing (emulsification equipment, beverage mixing tanks), new energy (lithium battery electrolyte agitation, hydrogen fuel cell preparation), and environmental protection. Mechanical seals typically consist of two main sealing surface structures: a static sealing surface structure and a dynamic sealing surface structure. The static sealing surface structure is fixed to the equipment housing, while the dynamic sealing surface structure is fixed to the shaft and rotates with the shaft. Under normal operating conditions, the dynamic sealing surface structure and the static sealing surface structure are in close contact, forming a tiny sealing line that prevents fluid from leaking between the sealing surfaces.

[0003] In the production process of mechanical seals, after the assembly stage is completed, an operational test is required. Currently, the commonly used operational test device in the industry is to mount the mechanical seal on a rotatable mechanical shaft and observe whether the mechanical seal can rotate normally under the drive of the shaft to determine whether its basic functions are normal. However, during the rotation and operation of the mechanical seal, this device cannot detect whether there is any leakage in the mechanical seal. If leakage occurs during subsequent operation, it will affect the reliability and safety of the mechanical seal in actual application.

[0004] To address the aforementioned issues, this application proposes a vertical low-speed high-pressure sealing test bench. Utility Model Content

[0005] Based on the technical problems existing in the background art, this utility model proposes a vertical low-speed high-pressure sealing test bench.

[0006] This utility model proposes a vertical low-speed high-pressure sealing test bench, including a support frame;

[0007] A test chamber is installed on the top of the bracket, and a test cavity is opened inside the test chamber. A transition connecting plate is installed on the top of the test chamber, and an opening is opened in the transition connecting plate that passes through and communicates with the test cavity. A drive shaft passing through the test chamber and the transition connecting plate and a drive component that drives it to rotate are installed on the bracket.

[0008] The test chamber is equipped with an auxiliary sealing assembly fitted onto the drive shaft to seal the connection between the drive shaft and the bottom of the test chamber.

[0009] Preferably, the auxiliary sealing assembly includes a base, a stationary sealing ring, a rotating sealing ring, and an elastic seal. The base is installed inside the test chamber and sleeved on the drive shaft. The base has a through hole through which the drive shaft rotates. The stationary sealing ring is fixed to the top of the base and sleeved on the drive shaft. The rotating sealing ring is rotatably fitted on the stationary sealing ring and fixedly sleeved on the drive shaft. The rotating sealing ring is fixedly sleeved on the drive shaft.

[0010] Preferably, the elastic seal includes a sealing seat, a spring, and a rubber ring. The sealing seat, which is sleeved on the drive shaft, is mounted on the sealing ring via the spring. The inner wall of the sealing seat is provided with a rubber ring that is sleeved on the outer circumference of the drive shaft.

[0011] Preferably, the driving component includes a geared motor, which is mounted at the bottom of the bracket and located below the drive shaft, and the output end of the geared motor is connected to the bottom end of the drive shaft.

[0012] Preferably, pressure sensors and temperature sensors located inside the test chamber are respectively installed on the inner walls of both sides of the test chamber.

[0013] Preferably, the back of the test chamber is connected to an inlet pipe and an outlet pipe that communicate with the test chamber, and valves are installed on both the inlet pipe and the outlet pipe.

[0014] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] 1. In use, the mechanical seal is fitted onto the top of the drive shaft, with the bottom of the mechanical seal inserted into the opening in the transition connecting plate. Then, a test medium, such as air, isolation fluid, or water, is injected into the test chamber inside the test chamber. Subsequently, the drive shaft is driven by the drive component to rotate the mechanical seal. It is observed whether the test medium leaks out from the connection between the transition connecting plate and the mechanical seal, thereby testing the sealing performance of the mechanical seal. The above design, by injecting a test medium into the test chamber and simulating rotation under working conditions, can effectively detect the sealing performance of the mechanical seal during dynamic operation, promptly identify any leakage defects, and thus improve the reliability of product factory testing and the safety in practical applications.

[0016] 2. To prevent the test medium from leaking out from the bottom of the test chamber during the test, this test bench is equipped with an auxiliary sealing assembly mounted on the drive shaft inside the test chamber. Specifically, when the drive shaft rotates, the sealing ring and elastic seal on the stationary sealing ring of the auxiliary sealing assembly rotate with it to prevent leakage under high pressure. The above design ensures that the test medium will not leak downward along the drive shaft under high pressure, thereby ensuring the accuracy of the test results and the safety of the test process.

[0017] 3. This elastic seal mainly consists of a sealing seat, a spring, and a rubber ring. The sealing seat is installed on top of the sealing ring and fitted onto the drive shaft via the spring. The inner wall of the sealing seat is fitted with a rubber ring that fits tightly against the outer circumference of the drive shaft, further preventing the test medium from leaking downwards along the drive shaft. The above design provides continuous clamping force through the spring and utilizes the tight fit between the rubber ring and the drive shaft to form an axial dynamic seal, enhancing the reliability of the auxiliary seal and further eliminating the path of leakage of the test medium along the drive shaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a vertical low-speed high-pressure sealing test bench proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the auxiliary sealing component of this utility model.

[0020] Reference numerals: 1. Bracket; 101. Drive shaft; 102. Gear motor; 2. Test chamber; 201. Pressure sensor; 202. Temperature sensor; 203. Inlet pipe; 204. Outlet pipe; 21. Test chamber; 22. Transition connecting plate; 3. Auxiliary sealing assembly; 31. Base; 32. Sealing stationary ring; 33. Sealing moving ring; 34. Elastic seal; 341. Sealing seat; 342. Spring; 343. Rubber ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0022] like Figure 1 and Figure 2 As shown, the present invention proposes a vertical low-speed high-pressure sealing test bench, which includes a support 1;

[0023] The top of the support 1 is equipped with a test chamber 2, the test chamber 2 has a test cavity 21, the top of the test chamber 2 is equipped with a transition connecting plate 22, and the transition connecting plate 22 has an opening that passes through and communicates with the test cavity 21. The support 1 is equipped with a drive shaft 101 that passes through the test chamber 2 and the transition connecting plate 22, as well as a drive component that drives it to rotate.

[0024] The test chamber 2 is equipped with an auxiliary sealing assembly 3 that is fitted onto the drive shaft 101 to seal the connection between the drive shaft 101 and the bottom of the test chamber 2.

[0025] The test chamber 21 inside the test chamber 2 is used to contain the test medium and provide a simulated working environment for the mechanical seal. The through opening on the transition connecting plate 22 not only realizes the connection between the test chamber 21 and the outside, but also provides an installation and positioning interface for the mechanical seal to be tested, so that the mechanical seal can be stably assembled on the top of the drive shaft 101 and form a closed space with the test chamber 21.

[0026] During testing, the mechanical seal is fitted onto the top of the drive shaft 101, with the bottom of the mechanical seal inserted into the opening in the transition connecting plate 22. Then, test medium, such as air, isolation fluid, or water, is injected into the test chamber 21 inside the test chamber 2. Subsequently, the drive shaft 101 is driven by the drive component to rotate the mechanical seal, thereby simulating the dynamic operating state of the mechanical seal under actual working conditions. During the test, the auxiliary sealing component 3 effectively prevents the test medium from leaking downwards along the drive shaft 101, ensuring the sealing of the high-pressure medium during the test, thereby improving the accuracy and safety of the test.

[0027] In a specific embodiment, the auxiliary sealing assembly 3 includes a base 31, a stationary sealing ring 32, a rotating sealing ring 33, and an elastic sealing element 34. The base 31 is installed inside the test chamber 2 and sleeved on the drive shaft 101. A through hole is opened in the base 31 to allow the drive shaft 101 to rotate through. The stationary sealing ring 32 is fixed to the top of the base 31 and sleeved on the drive shaft 101. The rotating sealing ring 33, which is fixedly sleeved on the drive shaft 101, is rotatably fitted on the stationary sealing ring 32. An elastic sealing element 34, which is sleeved on the drive shaft 101, is fixed on the rotating sealing ring 33. When the drive shaft 101... During rotation, the sealing moving ring 33 rotates synchronously with the transmission shaft 101, while the sealing stationary ring 32 remains stationary. The sealing surfaces of the two are tightly fitted together, forming the first dynamic sealing defense line. The elastic sealing element 34 is fixedly connected to the sealing moving ring 33 and rotates together with the sealing moving ring 33. Through its elastic force, it always keeps the sealing components inside it tightly fitted with the transmission shaft 101, further enhancing the sealing effect and effectively preventing the high-pressure test medium in the test chamber 21 from leaking downwards along the gap between the transmission shaft 101 and the sealing stationary ring 32, providing double protection for the stability of the high-pressure environment in the test chamber 21.

[0028] In a specific embodiment, the elastic seal 34 includes a sealing seat 341, a spring 342 and a rubber ring 343. The sealing ring 33 is mounted on the spring 342 and sleeved on the drive shaft 101. The inner wall of the sealing seat 341 is provided with a rubber ring 343 sleeved on the outer periphery of the drive shaft 101.

[0029] Under the clamping force of spring 342, rubber ring 343 and outer peripheral surface of drive shaft 101 form a tightly fitting sealing surface to achieve axial dynamic sealing;

[0030] When the drive shaft 101 rotates, the rubber ring 343 rotates synchronously with the sealing seat 341 and the sealing moving ring 33. The tight fit between the rubber ring 343 and the drive shaft 101 is always maintained, which can effectively block the test medium from penetrating along the surface of the drive shaft 101 and further isolate the path of downward leakage of the high pressure test medium.

[0031] In a specific embodiment, the driving component includes a geared motor 102, which is mounted at the bottom of the bracket 1 and located below the drive shaft 101. The output end of the geared motor 102 is connected to the bottom end of the drive shaft 101. During the test, the drive shaft 101 can be rotated simply by driving the geared motor 102.

[0032] In a specific embodiment, pressure sensor 201 and temperature sensor 202 are respectively installed on the inner walls of both sides of the test chamber 2, located in the test chamber 21. Pressure sensor 201 is used to detect the pressure value in the test chamber 21 and provide real-time feedback on the pressure status of the test medium. If the pressure drops abnormally, it can be judged in time that there may be a leak, providing the test personnel with intuitive pressure data reference. Temperature sensor 202 is used to monitor the temperature change of the test medium in the test chamber 21 in real time. On the one hand, it can ensure that the test is carried out in the set temperature environment to avoid the impact of temperature fluctuation on the sealing performance of the mechanical seal. On the other hand, it can indirectly judge the operating status of the mechanical seal through temperature changes, providing temperature data support for a comprehensive evaluation of the performance of the mechanical seal.

[0033] In a specific embodiment, the back of the test chamber 2 is connected to an inlet pipe 203 and an outlet pipe 204 that communicate with the test chamber 21, and valves are installed on both the inlet pipe 203 and the outlet pipe 204. The inlet pipe 203 on the back of the test chamber 2 communicates with the test chamber 21 and serves as an injection channel for the test medium. Before the test, air, isolation fluid, or water or other test media are injected into the test chamber 21 through the inlet pipe 203 to meet the test requirements of different types of mechanical seals. The outlet pipe 204 is also connected to the test chamber 21 and is used to discharge the medium in the test chamber 21 after the test, so as to realize the recovery or discharge of the medium. The valves installed on the inlet pipe 203 and the outlet pipe 204 can realize the control of the flow of the medium. When injecting the medium, the valve of the inlet pipe 203 is opened and the valve of the outlet pipe 204 is closed. During the test, the valves on both sides are closed to maintain the closed state of the test chamber 21 and ensure the stability of the high pressure environment. After the test, the valve of the inlet pipe 203 is closed and the valve of the outlet pipe 204 is opened to quickly discharge the test medium.

[0034] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model, and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical low-speed high-pressure sealing test bench, characterized in that, Including the support (1); The top of the bracket (1) is equipped with a test chamber (2), and the test chamber (2) has a test cavity (21) inside. The top of the test chamber (2) is equipped with a transition connecting plate (22), and the transition connecting plate (22) has an opening that passes through and communicates with the test cavity (21). The bracket (1) is equipped with a drive shaft (101) that passes through the test chamber (2) and the transition connecting plate (22) and a drive component that drives it to rotate. The test chamber (2) is equipped with an auxiliary sealing assembly (3) mounted on the drive shaft (101) for sealing the connection between the drive shaft (101) and the bottom of the test chamber (2).

2. The vertical low-speed high-pressure sealing test bench according to claim 1, characterized in that, The auxiliary sealing assembly (3) includes a base (31), a sealing stationary ring (32), a sealing rotating ring (33), and an elastic sealing element (34). The base (31) is installed inside the test chamber (2) and sleeved on the drive shaft (101). The base (31) has a through hole that allows the drive shaft (101) to rotate through. The sealing stationary ring (32) is fixed on the top of the base (31) and sleeved on the drive shaft (101). The sealing stationary ring (32) is rotatably fitted with the sealing rotating ring (33) which is fixedly sleeved on the drive shaft (101). The sealing rotating ring (33) is fixedly sleeved on the drive shaft (101). The elastic sealing element (34) is fixedly sleeved on the drive shaft (101).

3. The vertical low-speed high-pressure sealing test bench according to claim 2, characterized in that, The elastic seal (34) includes a sealing seat (341), a spring (342) and a rubber ring (343). The sealing ring (33) is fitted with a sealing seat (341) on the transmission shaft (101) by means of the spring (342). The inner wall of the sealing seat (341) is provided with a rubber ring (343) fitted on the outer circumference of the transmission shaft (101).

4. The vertical low-speed high-pressure sealing test bench according to claim 1, characterized in that, The driving component includes a geared motor (102), which is mounted at the bottom of the bracket (1) and located below the drive shaft (101). The output end of the geared motor (102) is connected to the bottom end of the drive shaft (101).

5. A vertical low-speed high-pressure sealing test bench according to claim 1, characterized in that, The test chamber (2) has pressure sensor (201) and temperature sensor (202) installed on the inner walls of both sides, which are located in the test chamber (21).

6. A vertical low-speed high-pressure sealing test bench according to claim 1, characterized in that, The back of the test chamber (2) is connected to an inlet pipe (203) and an outlet pipe (204) that communicate with the test chamber (21), and valves are installed on both the inlet pipe (203) and the outlet pipe (204).

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