Double-end-face mechanical seal static pressure operation test bed

Abstract

The utility model relates to mechanical engineering and manufacturing, and discloses a double-end-face mechanical seal static pressure running test bench which comprises an operation bench, a partition plate is fixedly connected in the operation bench, supporting blocks are fixedly connected to the two sides of the top of the partition plate, and a filtering assembly is arranged in the middle of the partition plate. A mechanical sealing mechanism is installed between the tops of the two supporting blocks, a control box is arranged on the outer side of the operation table, electric push rods are fixedly connected to the two sides of the interior of the operation table, a supporting plate is fixedly connected to the side, away from the control box, of the operation table, and a high-pressure low-temperature tank is placed at the top of the supporting plate. According to the utility model, the high-pressure low-temperature tank is used for pressurizing the pressure cavity and injecting a medium consistent with an actual device, the sealing performance of the mechanical sealing cavity is detected, and the recovery, filtration and quantitative analysis of the leaked medium are realized through the arc-shaped collecting groove, the filter cartridge and the flow recorder. And meanwhile, the adaptive capacity of the sealing cavity to the temperature change can be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical engineering and manufacturing, especially a double -sided mechanical seal static pressure operation test bench of face. BACKGROUND

[0002] Mechanical seal is by at least a pair of perpendicular to the end face of the rotation axis under the action of fluid pressure and compensation mechanism elastic force (or magnetic force) and the cooperation of auxiliary seal keeps close and relative sliding and constitutes the device that prevents fluid leakage. As the key sealing element in the rotating equipment, mechanical seal is widely used in pump, compressor, mixer and other fluid power machinery, is applicable to petrochemical, electric power, aviation and other high temperature, high pressure, corrosive or volatile medium working condition. According to structure, mechanical seal is divided into single end face and double end face, wherein double end face seal is concerned because it can provide more reliable sealing effect in high pressure or dangerous medium environment. Its basic structure includes dynamic ring, static ring, auxiliary sealing element, spring etc., realizes low leakage through fluid film lubrication and compression force.

[0003] To ensure the performance and reliability of mechanical seal, a double end face mechanical seal static pressure operation test bench emerges as the times require, it tests the performance of sealing cavity under different pressure, temperature, speed conditions by simulating actual working conditions, is the important equipment of mechanical manufacturing and sealing technology research, helps the development of sealing design optimization and industry standardization. The test bench simulates the actual working conditions of sealing accurately, provides important support for sealing design optimization, material development and product performance verification, is the key equipment of sealing technology research and product quality control.

[0004] However, the prior art usually focuses on sealing test under single working condition, lacks comprehensive simulation capability for complex working conditions (such as high pressure, low temperature and temperature fluctuation). In addition, traditional leakage monitoring is mostly qualitative observation or simple flow measurement, the precision is relatively low, it is difficult to quantify the leakage volume, and accurate data support cannot be provided. The recovery and processing means of leakage medium are relatively simple, lack of automation and recycling function, and it is difficult to realize the consideration of environmental protection and economy.

[0005] In view of the above problems, a double end face mechanical seal static pressure operation test bench is proposed to solve the above problems. Utility model content

[0006] In order to make up for the above shortage, the utility model provides a double end face mechanical seal static pressure operation test bench, aims at solving the problems of insufficient complex working condition simulation capability of traditional sealing test system, low leakage monitoring precision, low medium recycling efficiency and low degree of automation in test process.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: a double end face mechanical seal static pressure operation test platform, including operation platform, the inside fixedly connected with the baffle of operation platform, both sides of the top of baffle are fixedly connected with the supporting block, the middle part of baffle is provided with filter assembly, the top between two supporting blocks is installed with mechanical seal mechanism, the outside of operation platform is provided with control box, both sides of the inside of operation platform are fixedly connected with electric push rod, the side fixedly connected with the supporting plate of operation platform away from control box, the top of supporting plate is placed with high pressure low temperature tank, the position of operation platform close to high pressure low temperature tank is provided with circulating collection component,

[0008] The circulating collection component includes two water pumps, the water pump is fixedly connected on the side wall of the operation table, the input end of one water pump is provided with a water inlet pipe, the output end of another water pump is provided with a water outlet pipe, two water pumps are located on both sides of the high pressure low temperature tank, and two water pumps close to one end of the high pressure low temperature tank are connected through pipelines.

[0009] As a further description of the above technical scheme:

[0010] The mechanical seal mechanism includes pressure chamber one and pressure chamber two, and an end face sealing assembly is arranged between the two.

[0011] As a further description of the above technical scheme:

[0012] The end face sealing assembly includes a dynamic ring and a static ring, and an auxiliary sealing ring is arranged at the connection between the dynamic ring and the static ring and the pressure chamber one and the pressure chamber two respectively.

[0013] As a further description of the above technical scheme:

[0014] The output end of the water outlet pipe away from the water pump is installed in the inside of the pressure chamber one.

[0015] As a further description of the above technical scheme:

[0016] The output end of the electric push rod is fixedly connected with a sealing block, and the sealing block is slidably connected in the inside of the pressure chamber one.

[0017] As a further description of the above technical scheme:

[0018] The filter assembly includes an arc-shaped collecting groove, the arc-shaped collecting groove is fixedly connected in the inside of the baffle, a through hole is formed in the lowest part of the inside of the arc-shaped collecting groove, a filter cartridge is threadedly connected in the through hole, and a flow recorder is arranged on the side wall of the filter cartridge.

[0019] As a further description of the above technical scheme:

[0020] The water inlet pipe is connected with the arc-shaped collecting groove at one end far away from the water pump, and the filter cartridge is located inside the water inlet pipe.

[0021] Further description of the above technical solution:

[0022] The top of the high-pressure low-temperature tank is provided with a pressurizing port.

[0023] The utility model has the following beneficial effects:

[0024] 1、In the utility model, the high-pressure low-temperature tank is used to pressurize the inside of the pressure cavity, realizing the sealing performance detection of the mechanical sealing cavity. After injecting the medium consistent with the equipment working into the sealing cavity, the sealing performance is evaluated by observing whether there is leakage at each connection. The arc-shaped collecting groove designed below the baffle can effectively collect the leaked medium, and the filter cartridge connected with the lowest point is used to filter the circulating oil. The filtered oil is returned to the high-pressure low-temperature tank again through the water pump, forming a closed loop system. In addition, the flow recorder connected with the side wall of the filter cartridge can accurately record the volume of the leaked medium, providing a quantitative basis for the sealing performance analysis.

[0025] 2、In the utility model, the high-pressure low-temperature tank is not only used to inject the test medium, but also used to control the temperature of the medium, thereby simulating the temperature change environment in the equipment working. Through this function, the adaptability of the sealing cavity to the temperature change can be detected, and the reliability and stability of the mechanical seal under the temperature change can be evaluated. This testing method can accurately verify the temperature resistance of the sealing element, and provide a reliable basis for the optimization of the mechanical seal under different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A perspective view of a double-end mechanical seal static pressure running test bench is provided for the utility model;

[0027] Figure 2 A structure diagram of a water pump of a double-end mechanical seal static pressure running test bench is provided for the utility model;

[0028] Figure 3 A structure diagram of a dynamic ring of a double-end mechanical seal static pressure running test bench is provided for the utility model;

[0029] Figure 4 A structure diagram of a baffle of a double-end mechanical seal static pressure running test bench is provided for the utility model;

[0030] Figure 5 A structure diagram of a filter cartridge of a double-end mechanical seal static pressure running test bench is provided for the utility model.

[0031] LEGEND:

[0032] 1. Control panel; 2. Control box; 3. Support block; 4. Electric push rod; 5. Mechanical seal mechanism; 501. Pressure chamber one; 502. Pressure chamber two; 503. Dynamic ring; 504. Stationary ring; 505. Auxiliary sealing ring; 6. High-pressure cryogenic tank; 7. Support plate; 8. Circulation collection assembly; 801. Water pump; 802. Inlet pipe; 803. Outlet pipe; 804. Pressurization port; 9. Sealing block; 10. Filter assembly; 1001. Arc-shaped collection trough; 1002. Filter cartridge; 1003. Flow recorder; 11. Baffle plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 - Figure 4The utility model provides a kind of double-end face mechanical seal static pressure operation test bench, including operation table 1, the inside fixed connection of operation table 1 has baffle 11, for separating internal structure and providing support, the top both sides of baffle 11 are fixedly connected with support block 3, and mechanical sealing mechanism 5 is installed between the top of two support blocks 3;Mechanical sealing mechanism 5 is composed of pressure chamber one 501 and pressure chamber two 502, and end face sealing assembly is arranged between the two, and end face sealing assembly includes dynamic ring 503 and static ring 504, and its working end face forms sealing effect. To enhance sealing performance, dynamic ring 503 and static ring 504 are respectively provided with auxiliary sealing ring 505 at the connection of pressure chamber one 501 and pressure chamber two 502, to prevent medium leakage. The outside of operation table 1 is provided with control box 2, for centralized control equipment operating parameter. The inside both sides of operation table 1 are fixedly connected with electric push rod 4, and the output of electric push rod 4 is fixedly connected with sealing block 9, and sealing block 9 is slidably connected in pressure chamber one 501, and position is adjusted by electric push rod 4 to meet different test needs. Operation table 1 is fixedly connected with support plate 7 on the side away from control box 2, and high-pressure low-temperature tank 6 is placed on the top of support plate 7, for providing high-pressure, low-temperature test environment. The position of operation table 1 close to high-pressure low-temperature tank 6 is provided with circulating collection component 8, and circulating collection component 8 includes two water pumps 801, and the input of one water pump 801 is provided with water inlet pipe 802, and the output of another water pump 801 is provided with water outlet pipe 803. Two water pumps 801 are located on the both sides of high-pressure low-temperature tank 6, and are respectively connected with the bottom of high-pressure low-temperature tank 6 and the inside of pressure chamber one 501 by pipeline, form medium circulation system, and the top of high-pressure low-temperature tank 6 is provided with pressurizing port 804, for realizing pressure loading and medium injection, ensure the accuracy of test working condition simulation and the reliable verification of sealing performance.

[0035] Refer to Figure 1 And Figure 5In the internal structure design of the operation platform 1, the middle part of the partition plate 11 is provided with a filtering assembly 10 for recycling and filtering the leaked medium. The filtering assembly 10 comprises an arc-shaped collecting groove 1001 fixedly connected to the inside of the partition plate 11, which is designed in a shape facilitating the collection of the leaked medium; a through hole is formed in the lowest part of the inside of the arc-shaped collecting groove 1001, and a filter cartridge 1002 is threadedly connected in the through hole; the filter cartridge 1002 is used for filtering the impurities in the recycled leaked medium, so as to ensure the cleanliness of the medium; a flow recorder 1003 is installed on the sidewall of the filter cartridge 1002, which is used for recording the flow and total amount of the leaked medium in real time, so as to provide data support for the accurate analysis of the leakage amount. The end of the water inlet pipe 802 away from the water pump 801 is connected with the arc-shaped collecting groove 1001, and the filter cartridge 1002 is located in the inside of the water inlet pipe 802, so that a complete filtering and recycling path is formed. After the leaked medium is collected by the arc-shaped collecting groove 1001, the leaked medium is filtered by the filter cartridge 1002 and then sent into the water inlet pipe 802, and finally the leaked medium is extracted by the water pump 801 into the circulating system, so that the recycling, filtering and reuse of the medium are realized. This design not only effectively solves the recycling and treatment problem of the leaked medium, but also accurately monitors the leakage amount, improves the environmental protection and data analysis capability of the test platform, and at the same time ensures the circulating use quality of the test medium and optimizes the equipment performance.

[0036] Working principle: The double-end-face mechanical seal static pressure operation test platform realizes the comprehensive test of the mechanical seal performance through the collaborative operation of multiple modules. The high-pressure low-temperature tank 6 provides a high-pressure and low-temperature test environment, and applies pressure to the pressure chamber one 501 and the pressure chamber two 502 through the top water outlet pipe 803 to simulate the actual working condition of the equipment. The end face sealing assembly of the mechanical seal mechanism 5 is composed of a dynamic ring 503 and a static ring 504, and an auxiliary sealing ring 505 is arranged to prevent the medium from leaking and ensure the stability of the sealing cavity. The electric push rod 4 in the inside of the operation platform 1 drives the sealing block 9 to slide to adjust the internal state of the pressure chamber one 501 to adapt to different test requirements. The leaked medium is collected by the arc-shaped collecting groove 1001 of the filtering assembly 10, filtered by the filter cartridge 1002, and then the leakage amount is recorded by the flow recorder 1003, and then the leaked medium enters the circulating system through the water inlet pipe 802 and is extracted by the water pump 801 back to the high-pressure low-temperature tank 6. The whole system realizes the medium circulation, data monitoring and efficient recycling, and ensures the accuracy and environmental protection of the sealing test.

[0037] Finally, it should be pointed out that the above-mentioned is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A static pressure run test bench for double mechanical seals, comprising an operating table (1), characterized in that: The inside of the operating platform (1) is fixedly connected with a partition plate (11), both sides of the top of the partition plate (11) are fixedly connected with support blocks (3), the middle of the partition plate (11) is provided with a filter assembly (10), a mechanical sealing mechanism (5) is installed between the tops of the two support blocks (3), the outside of the operating platform (1) is provided with a control box (2), both sides of the inside of the operating platform (1) are fixedly connected with electric push rods (4), the side of the operating platform (1) away from the control box (2) is fixedly connected with a support plate (7), the top of the support plate (7) places a high-pressure low-temperature tank (6), and the position close to the high-pressure low-temperature tank (6) of the operating platform (1) is provided with a circulating collection assembly (8). The circulating collection assembly (8) comprises two water pumps (801), the water pumps (801) are fixedly connected to the side walls of the operating platform (1), the input end of one water pump (801) is provided with a water inlet pipe (802), the output end of the other water pump (801) is provided with a water outlet pipe (803), and the two water pumps (801) are located on both sides of the high-pressure low-temperature tank (6) and are connected to the high-pressure low-temperature tank (6) through pipes close to one end of the high-pressure low-temperature tank (6).

2. A static pressure running test bench of double end face mechanical seal according to claim 1, characterized in that: The mechanical sealing mechanism (5) comprises pressure cavities one (501) and two (502), and an end face sealing assembly is arranged between the two.

3. A rig for static pressure running of dual face mechanical seals according to claim 2, characterized in that: The end face sealing assembly comprises a dynamic ring (503) and a static ring (504), and the connecting parts between the dynamic ring (503) and the static ring (504) and the pressure cavities one (501) and two (502) are respectively provided with auxiliary sealing rings (505).

4. A rig for static pressure running of dual face mechanical seals according to claim 2, characterized in that: The output end of the water outlet pipe (803) away from the water pump (801) is installed in the inside of the pressure cavity one (501).

5. A rig for static pressure running of dual face mechanical seals according to claim 4, characterized in that: The output end of the electric push rod (4) is fixedly connected with a sealing block (9), and the sealing block (9) is slidably connected in the inside of the pressure cavity one (501).

6. A rig for static pressure running test of dual mechanical seals according to claim 1, characterized in that: The filter assembly (10) comprises an arc-shaped collection groove (1001), the arc-shaped collection groove (1001) is fixedly connected in the inside of the partition plate (11), a through hole is formed in the lowest part of the inside of the arc-shaped collection groove (1001), a filter cartridge (1002) is threadedly connected in the through hole, and a flow recorder (1003) is arranged on the side wall of the filter cartridge (1002).

7. A rig for static pressure running of dual face mechanical seals according to claim 6, characterized in that: The output end of the water outlet pipe (803) away from the water pump (801) is installed in the inside of the pressure cavity one (501).

8. A rig for static pressure running of dual face mechanical seals according to claim 1, characterized in that: The top of the high-pressure low-temperature tank (6) is provided with a pressurizing port (804).

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