CN111024375A - Test system for simulating mechanical sealing performance under severe working conditions - Google Patents
Test system for simulating mechanical sealing performance under severe working conditions Download PDFInfo
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- CN111024375A CN111024375A CN201911133850.8A CN201911133850A CN111024375A CN 111024375 A CN111024375 A CN 111024375A CN 201911133850 A CN201911133850 A CN 201911133850A CN 111024375 A CN111024375 A CN 111024375A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention relates to a test system for simulating mechanical sealing performance under severe working conditions, which comprises a speed regulating system, a test system, a loading system, an environment adjusting system and a test piece, wherein the speed regulating system is connected with the test system; the environment adjusting system comprises a box body, a temperature control system and a pressure control system; the testing system comprises a movable shaft and a fixed shaft, the movable shaft is supported in the box body through a bearing seat, and the middle part of the movable shaft is connected with a speed change gear and is driven by a speed regulating system; the front part of the fixed shaft is provided with a loading sleeve, and the tail end of the fixed shaft is supported by a bearing seat; the opposite ends of the movable shaft and the fixed shaft are respectively provided with a dynamic sealing ring and a static sealing ring of the test piece; a pressure sensor is arranged outside the static sealing ring; a photoelectric rotating speed measurer is arranged below the moving shaft, and a temperature sensor is arranged on the loading sleeve; the loading system comprises a fulcrum upright post, the bottom end of the fulcrum upright post is fixedly connected with the box body, the top end of the fulcrum upright post is hinged with a loading lever, one end of the loading lever is hinged with the tail end of the loading sleeve, and the other end of the loading lever is provided with a platform for loading weights; under the test state, the end faces of the dynamic sealing ring and the static sealing ring are tightly attached.
Description
Technical Field
The invention relates to the field of mechanical sealing, in particular to a test system for simulating mechanical sealing performance under severe working conditions.
Background
The mechanical seal has the advantages of good sealing performance, long service life, stable performance, low friction power consumption, small leakage amount, high safety and reliability and the like, and is widely applied to the fields of petrochemical industry, aerospace and the like. In the fields of petrochemical industry and aerospace, rotary machines can be in various severe working conditions: extreme high and low temperature, high vacuum, radiation, high and low rotation speed, high and low load, water vapor environment, inert gas environment, sand dust environment and the like.
The severe environment can greatly affect the friction performance of the sealing material, even lead to the failure of the sealing, affect the reliability and safety of the space equipment, and seriously bring unforeseen results. However, a theoretical system with a mature system is not formed in the friction performance research of the mechanical sealing material under the severe working condition, and at the present stage, the friction and wear testing machine only stops to test the material and does not simulate the operation under the severe working condition; on the other hand, the high and low temperature vacuum experiment box has large volume, is heavy, is not easy to move and is expensive, so that the research of an experiment stage and the support of related experiment data are lacked. Therefore, the method has guiding significance for researching the friction performance of the mechanical sealing material matched pair under the severe working conditions and manufacturing and assembling the mechanical sealing material under the severe working conditions.
Disclosure of Invention
The invention aims to provide a test system for simulating mechanical sealing performance under severe working conditions, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a test system for simulating mechanical sealing performance under severe working conditions comprises a speed regulation system, a test system, a loading system, an environment regulation system and a test piece; the environment adjusting system comprises a box body, and a temperature control system and a pressure control system which are arranged in the box body; the testing system comprises two sections of shafts which are positioned on the same horizontal line, wherein one section of shaft is a movable shaft, the other section of shaft is a fixed shaft, the movable shaft is supported in the box body through a bearing seat, and the middle part of the movable shaft is connected with a speed change gear and is driven by a speed regulation system; the front part of the fixed shaft is provided with a loading sleeve, and the tail end of the fixed shaft is supported by a bearing seat; the opposite ends of the movable shaft and the fixed shaft are respectively provided with a movable sealing ring and a static sealing ring of a piece to be tested; a pressure sensor is arranged outside the static sealing ring; a photoelectric rotating speed measurer is arranged below the moving shaft, and a temperature sensor is arranged on the loading sleeve; the loading system comprises a fulcrum upright post, the bottom end of the fulcrum upright post is fixedly connected with the box body, the top end of the fulcrum upright post is hinged with a loading lever, one end of the loading lever is hinged with the tail end of the loading sleeve, and the other end of the loading lever is provided with a platform for loading weights; under the test state, the end faces of the dynamic sealing ring and the static sealing ring are tightly attached. The weight can be added, and the load is transferred to the loading sleeve through the loading lever. The loading sleeve transfers the load to the static sealing ring base, and the static sealing ring base loads the static sealing ring of the mechanical seal. The influence of the load on the mechanical sealing performance can be researched under the severe working condition.
The front turbulence of the moving shaft is provided with a movable sealing ring fastening seat, the movable sealing ring fastening seat is composed of a movable seat and a fixed seat, the fixed seat is fixedly connected with the moving shaft, the center of the end face of the movable seat is provided with a circular hole, the movable sealing ring is embedded in the movable seat, flanges are arranged on the outer edges of the movable seat and the fixed seat, and the movable seat and the fixed seat are connected through bolts.
The front end of the fixed shaft is fixedly connected with a static sealing ring fastening seat, the static sealing ring is embedded in the static sealing ring fastening seat, the front end of the static sealing ring protrudes out of the static sealing ring fastening seat, a force measuring sleeve is installed outside the static sealing ring fastening seat, and a pressure sensor is installed on the force measuring sleeve.
The force measuring sleeve is composed of two semicircular lantern rings, one ends of the two lantern rings are hinged, and the other ends of the two lantern rings are provided with a connecting plate and a mounting hole which are fixedly connected through bolts.
And a groove is arranged on the moving shaft corresponding to the photoelectric rotating speed measurer.
The speed change gear is connected with a movable shaft key or in interference fit, and can also be connected with an elastic positioning pin arranged on the movable shaft, and when the speed change gear is connected with the movable shaft through the positioning pin, the positioning groove is formed in the inner wall of the speed change gear in a matched mode.
And the pressure sensor, the temperature sensor, the photoelectric rotating speed measurer and the pressure gauge are all connected with a computer.
The speed regulating system comprises a motor and a differential mechanism, the motor is connected with an input shaft of the differential mechanism, an output shaft of the differential mechanism penetrates through the box body, a power output gear is installed on the box body, and the power output gear is meshed with a speed change gear on the moving shaft. The variable speed gear can be replaced by different models to achieve the condition of speed change, and the influence of the rotating speed on the mechanical sealing performance can be researched under the severe working condition.
The temperature control system comprises a quartz lamp arranged at the top of the box body, and the quartz lamp is used for heating and raising the temperature; the liquid nitrogen transmission pipeline consists of an aluminum alloy pipe and a polyurethane foaming heat-insulating layer, and is fixedly installed on the inner wall of the box body in a spiral manner, the valve is installed at the liquid nitrogen inlet of the liquid nitrogen transmission pipeline, and liquid nitrogen flows through the liquid nitrogen transmission pipeline, continuously exchanges heat and is cooled.
The pressure control system comprises an air inlet pipeline and an air inlet valve, an air suction pipeline and an air suction valve, a vacuum pump and a pressure gauge, wherein the air inlet pipeline and the air suction pipeline are both arranged on the side wall of the box body, the air inlet valve is arranged on the air inlet pipeline, and the air suction pipeline is provided with the air suction valve and the pressure gauge and is connected with the vacuum pump.
When a vacuum environment needs to be manufactured, an air exhaust valve of an air exhaust pipeline is opened, an air inlet valve of an air inlet pipeline is closed, a vacuum pump performs vacuum pumping operation, a pressure gauge is used for reading, and the vacuum pump is stopped to be closed after an ideal pressure value is obtained; after the experiment, the vacuum pump is closed, the air exhaust valve is closed, and the air inlet valve is opened, so that the normal pressure in the box body is recovered; when other experimental environments need to be manufactured, the air suction valve is closed, the air inlet valve is opened, and water vapor, inert gas and dust-containing gas are introduced into the box body, so that the severe working conditions of the water vapor, inert gas environment and dust-containing particle environment can be simulated.
The bottom of box is equipped with the base, bearing frame and fulcrum stand all install on the base.
The rotating speed measuring system, the temperature measuring system, the friction force measuring system and the in-box pressure measuring system
The photoelectric rotating speed measurer is connected with a rotating speed display instrument, the motor rotates to drive the motor shaft to rotate, the photoelectric rotating speed measurer receives an optical signal generated by the moving shaft and converts the optical signal into an electric signal, the actual rotating speed displayed by the rotating speed display instrument is the received electric signal, and the instant speed is displayed on the rotating speed display instrument after a series of operations.
The temperature sensor is connected with the temperature display instrument, when the temperature sensor receives signals collected by the temperature sensor, the instant temperature around the end face of the test piece is displayed, and the temperature sensor is installed on the loading sleeve because the loading sleeve is basically in a static state and is as close to the mechanical sealing end face as possible.
The invention has the beneficial effects that: through the speed change system, the loading system and the temperature system, the friction pair combination and the pressure system are changed, so that the temperature value, the rotating speed value, the load value, the pressure value and the friction value are tested and recorded, the test of the mechanical sealing performance under different severe working conditions is realized, the change of the mechanical sealing performance is researched, and data support and theoretical basis are provided for the manufacturing and assembling of the mechanical seal.
Drawings
FIG. 1 is a diagram of a system for testing mechanical sealing performance under severe operating conditions.
FIG. 2 shows a liquid nitrogen transfer line.
FIG. 3 is a schematic connection diagram of the static seal ring, the force measuring sleeve and the static seal ring fastening seat.
Fig. 4 is a cross-sectional view of fig. 3.
In the figure, a quartz lamp 1, an output shaft 2, a liquid nitrogen transmission pipeline 3, a bearing seat 4, a movable shaft 5, a power output gear 6, a speed change gear 7, a positioning pin 8, a bearing seat 9, a groove 10, a photoelectric rotating speed measurer 11, a movable sealing ring fastening seat 12, a fixed shaft 13, a movable sealing ring 14, a static sealing ring 15, a force measuring sleeve 16, a static sealing ring fastening seat 17, a temperature sensor 18, a loading sleeve 19, a fulcrum upright post 20, a loading lever 21, a weight 22, a base 23, a box body 24, an air suction valve 25, a vacuum pump 26, a pressure gauge 27, an air inlet valve 28, a valve 29, a bearing seat 30, a motor 31, a differential 32, an air inlet pipeline 33, an air suction pipeline 34,
Detailed Description
The severe working conditions are simulated by various systems in the invention, dozens of different severe working condition combinations can be achieved, the speed change system is adjusted to change the rotating speed, the load is changed by the loading system, the temperature is changed by the temperature system, the friction pair combination is changed by changing the dynamic sealing ring and the static sealing ring of the mechanical seal, and the environment is changed by changing the pressure, so that the mechanical seal performance test under different severe working conditions is realized.
As shown in fig. 1-4, a test system for simulating mechanical sealing performance under severe conditions comprises a speed regulation system, a test system, a loading system, an environment regulation system and a test piece; the environmental conditioning system includes a tank 24 and a temperature control system and a pressure control system mounted within the tank 24.
As shown in fig. 1 and 3, the testing system includes two sections of shafts located on the same horizontal line, one of which is a movable shaft 5 and the other is a fixed shaft 13, the movable shaft 5 is supported in the box body through bearing blocks 4 and 9, and the middle part of the movable shaft 5 is connected with a speed change gear 7 and is driven by a speed regulation system; the front part of the fixed shaft 13 is provided with a loading sleeve 19, and the tail end of the fixed shaft is supported by a bearing seat 30; the opposite ends of the movable shaft 5 and the fixed shaft 13 are respectively provided with a movable sealing ring 14 and a static sealing ring 15 of a piece to be tested; a pressure sensor is arranged outside the static sealing ring 15; a photoelectric rotating speed measurer 11 is arranged below the moving shaft 5, and a temperature sensor 18 is arranged on a loading sleeve 19; the loading system comprises a fulcrum upright post 20, the bottom end of the fulcrum upright post 20 is fixedly connected with a box body 24, the top end of the fulcrum upright post is hinged with a loading lever 21, one end of the loading lever 21 is hinged with the tail end of a loading sleeve 19, and the other end of the loading lever is provided with a platform for loading a weight 22; under the test state, the end surfaces of the dynamic sealing ring 14 and the static sealing ring 15 are tightly attached. A weight 22 may be added to transfer the load to the loading sleeve 19 via the loading lever 21. The loading sleeve 19 transfers the load to the static seal ring seat 17, and the static seal ring seat 17 loads the static seal ring 15 of the mechanical seal. The influence of the load on the mechanical sealing performance can be researched under the severe working condition.
As shown in fig. 3 and 4, a movable sealing ring fastening seat 12 is arranged in front of the movable shaft 5, the movable sealing ring fastening seat 12 is composed of a movable seat 12-2 and a fixed seat 12-1, wherein the fixed seat 12-1 is fixedly connected with the movable shaft 5, a circular hole is formed in the center of the end face of the movable seat 12-2, a movable sealing ring 14 is embedded in the movable seat 12-2, and flanges are arranged on the outer edges of the movable seat 12-2 and the fixed seat 12-1 and are connected with each other through bolts.
The front end of the fixed shaft 13 is fixedly connected with a static sealing ring fastening seat 17, the static sealing ring 15 is embedded in the static sealing ring fastening seat 17, the front end of the static sealing ring 15 protrudes out of the static sealing ring fastening seat 17, a force measuring sleeve 16 is installed outside the static sealing ring fastening seat 17, and a pressure sensor is installed on the force measuring sleeve 16.
The force measuring sleeve 16 consists of two semicircular lantern rings, one ends of the two lantern rings are hinged, and the other ends of the two lantern rings are provided with a connecting plate and a mounting hole which are fixedly connected through bolts.
And a groove is arranged on the moving shaft corresponding to the photoelectric rotating speed measurer 11.
The change gear 7 is connected with 5 key-type connections of moving axis or interference fit, also can be connected through the elastic locating pin 8 that sets up on moving axis 5, and when adopting locating pin 8 to connect, the constant head tank has been seted up in the inner wall cooperation of change gear 7.
And the pressure sensor, the temperature sensor 18, the photoelectric rotating speed measurer 11 and the pressure gauge 27 are all connected with a computer.
The speed regulating system comprises a motor 31 and a differential 32, wherein the motor 31 is connected with an input shaft of the differential 32, an output shaft 2 of the differential 32 penetrates through the box body 24, and a power output gear 6 is arranged, and the power output gear 6 is meshed with a speed changing gear 7 on the moving shaft 5. The speed change gear 7 can be replaced by different models to achieve the speed change condition, and the influence of the rotating speed on the mechanical sealing performance can be researched under the severe working condition.
The temperature control system comprises a quartz lamp 1 arranged at the top of the box body 24, and the quartz lamp 1 is used for heating and warming; still include the cooling system, by liquid nitrogen transmission pipeline 3, liquid nitrogen entry 35 and valve 29 constitute, liquid nitrogen transmission pipeline 3 comprises aluminum alloy tube and polyurethane foam heat preservation, is the heliciform installation fixed on box 24 inner wall, and liquid nitrogen entry installation valve 29 of liquid nitrogen transmission pipeline 3, liquid nitrogen flows through liquid nitrogen transmission pipeline 3, and continuous heat transfer cools down.
The pressure control system comprises an air inlet pipeline 33, an air inlet valve 28, an air suction pipeline 34, an air suction valve 25, a vacuum pump 26 and a pressure gauge 27, wherein the air inlet pipeline 33 and the air suction pipeline 34 are both installed on the side wall of the box body 24, the air inlet valve 28 is installed on the air inlet pipeline 33, and the air suction pipeline 34 is provided with the air suction valve 25 and the pressure gauge 27 and is connected with the vacuum pump 26.
When a vacuum environment needs to be manufactured, the air suction valve 25 of the air suction pipeline 34 is opened, the air inlet valve 28 of the air inlet pipeline 33 is closed, the vacuum pump 26 performs vacuum pumping operation, the pressure gauge 27 is used for reading, and the vacuum pump 26 is stopped to be closed after an ideal pressure value is obtained; after the experiment, the vacuum pump 26 is closed, the air suction valve 25 is closed, and the air inlet valve 28 is opened, so that the normal pressure in the box body 24 is recovered; when other experimental environments need to be manufactured, the air suction valve 25 is closed, the air inlet valve 2 is opened, and water vapor, inert gas and dust-containing gas are introduced into the box body 24, so that the severe working conditions of the water vapor, inert gas environment and dust-containing particle environment can be simulated.
The bottom of the box body 24 is provided with a base, and the bearing seat and the fulcrum upright post are both arranged on the base.
The rotating speed measuring system, the temperature measuring system, the friction force measuring system and the in-box pressure measuring system
The photoelectric rotating speed measuring instrument 11 is connected with a rotating speed display instrument, the motor rotates to drive the motor shaft to rotate, the photoelectric rotating speed measuring instrument 11 receives an optical signal generated by the moving shaft 5 and converts the optical signal into an electric signal, the actual rotating speed displayed by the rotating speed display instrument is the received electric signal, and after a series of operations, the instant speed is displayed on the rotating speed display instrument.
The temperature sensor 18 is connected with a temperature display instrument, and when the temperature display instrument receives signals collected by the temperature sensor 18, the temperature display instrument displays the instant temperature around the end face of the test piece, and the temperature sensor 18 is installed on the loading sleeve 19 because the loading sleeve 19 is basically in a static state and is as close to the mechanical sealing end face as possible.
As shown in fig. 3, when the dynamic seal ring 14 rotates, the force measuring sleeve 16 keeps the whole formed by the static seal ring 15, the static seal ring fastening seat 17 and the force measuring sleeve 16 still, at this time, the pressure sensor is under the action of pressure, and the pressure sensor is displayed on the acquisition system after passing through the amplifier, and a corresponding pressure value can be directly read from a computer of the acquisition system. Suppose that: the dynamic seal ring 14 rotates clockwise at a uniform speed, the whole consisting of the static seal ring 15, the static seal ring fastening seat 17 and the force measuring sleeve 16 is in a force balance static state, the static seal ring 15 and the dynamic seal ring 14 generate friction force F in a mutual grinding mode, the friction force F generates clockwise moment at the center of the shaft, the force Q of the pressure sensor generates another anticlockwise moment at the center of the shaft, and the two moments are balanced with each other, namely:
F·R＝Q·L
wherein F is friction; r is the outer radius of the static sealing ring; q is the pressure sensor reading; and L is the arm length of the force measuring sleeve. And (3) measuring the instantaneous friction force F, and obtaining the friction coefficient according to the ratio of the friction force F to the loading load N, wherein the friction coefficient is an important index for measuring the mechanical sealing performance.
The specific implementation process of the test system is as follows: assembling a speed regulating system, assembling a loading system, assembling a testing system, assembling a temperature system and a pressure system, testing and recording results.
The specific embodiment is as follows: the severe environment is as follows: under the environment of high temperature, high load and nitrogen, the dynamic sealing ring is made of carbon-based graphite composite material, the static sealing ring is made of hard alloy steel, and the influence of load on mechanical sealing performance is researched under the severe environment.
1. Assembling a speed regulating system: on the base 23 are mounted bearing blocks 4, 9 and bearings 6, 10, which are selected according to the shaft diameter. A speed change gear 7 and a positioning pin 8 are arranged and connected with a gear shaft 2 through a gear, and the gear shaft is connected with a motor.
2. Assembling a loading system: the static sealing ring base 17 and the static sealing ring 15 are clamped through the force measuring sleeve 16, the static sealing ring base 17 is connected with the loading sleeve 19 through a positioning pin, the loading sleeve 19 is hinged with the loading lever 21, and a weight 22 is added on the loading lever 21.
3. Assembling a test system: installing a photoelectric rotating speed measurer 11 to measure the rotating speed; a temperature sensor 18 is installed to measure the temperature; the dynamic sealing ring 14 is connected with the moving shaft 5 through the dynamic sealing ring fastening seat 12 to keep rotating, the static sealing ring 15 is connected with the static sealing ring fastening seat 17, the force measuring sleeve 16 clamps the static sealing ring fastening seat 17 through a bolt, at the moment, the static sealing ring 15, the static sealing ring fastening seat 17 and the force measuring sleeve 16 are integrated, and a pressure sensor is arranged on the force measuring sleeve 16 to measure friction force.
4. Assembling a temperature system: the quartz lamp 1 is installed on the top of the box 24, the liquid nitrogen transmission pipeline 3 is installed in the box 24 in a spiral shape, the box 24 is installed, and the liquid nitrogen transmission pipeline valve 29 is also connected.
5. Assembling a pressure system: an air inlet line 33, an air inlet valve 28, an air suction line 34, an air suction valve 25, a vacuum pump 26, and a pressure gauge 27 are installed on one side of the case 24.
6. And (3) testing: as the influence of the load on the mechanical sealing performance is researched under the severe environment of high temperature, high load and nitrogen environment, the other parameters are kept unchanged, only the load value is changed, and the mechanical sealing performance under the unchanged severe environment is tested by increasing or decreasing the weight 22.
7. The results are recorded: the temperature value, the rotating speed value, the load value, the pressure value and the friction value are recorded, and the influence of the load on the mechanical sealing performance is researched under the severe environment of high temperature, high load and nitrogen environment, so that the temperature value, the rotating speed value and the pressure value are kept unchanged, the friction value is observed by only changing the load value, and the influence of the load on the mechanical sealing performance under the severe working condition is researched.
The mechanical seal friction pair combination performance testing device has the advantages of reasonable structure, high feasibility, convenience in disassembly, assembly, replacement and transportation of equipment, capability of realizing performance testing of different mechanical seal friction pair combinations under different severe working conditions, simplicity in operation, small size and the like, has experimental value and theoretical research value, fills up relevant blank of mechanical seal performance testing under severe working conditions, and provides a large amount of data support for further experimental execution and theoretical research. The invention has scientific research value and social value, provides experimental support and theoretical basis for manufacturing and assembling the mechanical seal under severe working conditions, and has good application prospect in the aspect of mechanical seal research.
While the specific embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A test system for simulating mechanical sealing performance under severe working conditions is characterized by comprising a speed regulating system, a test system, a loading system environment adjusting system and a test piece; the environment adjusting system comprises a box body, and a temperature control system and a pressure control system which are arranged in the box body; the testing system comprises two sections of shafts which are positioned on the same horizontal line, wherein one section of shaft is a movable shaft, the other section of shaft is a fixed shaft, the movable shaft is supported in the box body through a bearing seat, and the middle part of the movable shaft is connected with a speed change gear and is driven by a speed regulation system; the front part of the fixed shaft is provided with a loading sleeve, and the tail end of the fixed shaft is supported by a bearing seat; the opposite ends of the movable shaft and the fixed shaft are respectively provided with a movable sealing ring and a static sealing ring of a piece to be measured; a pressure sensor is arranged outside the static sealing ring; a photoelectric rotating speed measurer is arranged below the moving shaft, and a temperature sensor is arranged on the loading sleeve; the loading system comprises a fulcrum upright post, the bottom end of the fulcrum upright post is fixedly connected with the box body, the top end of the fulcrum upright post is hinged with a loading lever, one end of the loading lever is hinged with the tail end of the loading sleeve, and the other end of the loading lever is provided with a platform for loading weights; under the test state, the end faces of the dynamic sealing ring and the static sealing ring are tightly attached.
2. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein a movable sealing ring fastening seat is arranged on the front turbulence of the movable shaft, the movable sealing ring fastening seat is composed of a movable seat and a fixed seat, the fixed seat is fixedly connected with the movable shaft, a circular hole is formed in the center of the end face of the movable seat, the movable sealing ring is embedded in the movable seat, and flanges are arranged on the outer edges of the movable seat and the fixed seat and are connected through bolts.
3. The system for testing the mechanical sealing performance under the simulated severe working conditions as recited in claim 1, wherein the front end of the fixed shaft is fixedly connected with a static sealing ring fastening seat, the static sealing ring is embedded in the static sealing ring fastening seat, the front end of the static sealing ring protrudes out of the static sealing ring fastening seat, a force measuring sleeve is mounted outside the static sealing ring fastening seat, and the pressure sensor is mounted on the force measuring sleeve.
4. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 3, wherein the force measuring sleeve consists of two semicircular sleeve rings, one ends of the two sleeve rings are hinged, and the other ends of the two sleeve rings are provided with a connecting plate and a mounting hole which are fixedly connected through bolts.
5. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein a groove is formed in a moving shaft corresponding to the photoelectric rotating speed measurer.
6. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein the speed change gear is connected with a movable shaft key or in interference fit, or is connected with the movable shaft through an elastic positioning pin arranged on the movable shaft, and when the speed change gear is connected through the positioning pin, a positioning groove is arranged on the inner wall of the speed change gear in a fit manner.
7. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein the pressure sensor, the temperature sensor, the photoelectric rotating speed measurer and the pressure gauge are all connected with a computer.
8. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein the speed regulating system comprises a motor and a differential, the motor is connected with an input shaft of the differential, an output shaft of the differential penetrates through the box body, and a power output gear is mounted and meshed with a speed change gear on the moving shaft.
9. The test system for simulating the mechanical sealing performance under the severe working conditions according to claim 1, wherein the temperature control system comprises a quartz lamp arranged at the top of the box body, and the quartz lamp is used for heating and raising the temperature; the liquid nitrogen transmission pipeline consists of an aluminum alloy pipe and a polyurethane foaming heat-insulating layer, and is fixedly installed on the inner wall of the box body in a spiral manner, the valve is installed at the liquid nitrogen inlet of the liquid nitrogen transmission pipeline, and liquid nitrogen flows through the liquid nitrogen transmission pipeline, continuously exchanges heat and is cooled.
10. The system for testing the mechanical sealing performance under the simulated severe working conditions of claim 1, wherein the pressure control system comprises an air inlet pipeline and an air inlet valve, an air suction pipeline and an air suction valve, a vacuum pump and a pressure gauge, when the vacuum pump performs vacuum pumping, the air inlet pipeline and the air suction pipeline are both installed on the side wall of the box body, wherein the air inlet valve is installed on the air inlet pipeline, and the air suction pipeline is provided with the air suction valve and the pressure gauge and is connected with the vacuum pump.
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| CN111896259A (en) * | 2020-07-31 | 2020-11-06 | 沈阳建筑大学 | Ceramic roller bearing loading and testing system for low-temperature vacuum environment |
| CN111896258A (en) * | 2020-07-31 | 2020-11-06 | 沈阳建筑大学 | Ultra-low temperature vacuum seal structure and full ceramic rolling bearing performance testing device |
| CN113074817A (en) * | 2021-03-29 | 2021-07-06 | 中国航发长江动力有限公司 | Graphite sealing runway temperature measuring device |
| CN114894464A (en) * | 2022-07-13 | 2022-08-12 | 江苏金鹰流体机械有限公司 | Detection device is used in machining of mechanical seal |
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| CN111855212A (en) * | 2020-07-31 | 2020-10-30 | 沈阳建筑大学 | Device for detecting service performance of all-ceramic rolling bearing under ultralow-temperature wide-temperature-range working condition |
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| CN111896258A (en) * | 2020-07-31 | 2020-11-06 | 沈阳建筑大学 | Ultra-low temperature vacuum seal structure and full ceramic rolling bearing performance testing device |
| CN111896259B (en) * | 2020-07-31 | 2023-01-24 | 沈阳建筑大学 | Ceramic roller bearing loading and testing system for low-temperature vacuum environment |
| CN113074817A (en) * | 2021-03-29 | 2021-07-06 | 中国航发长江动力有限公司 | Graphite sealing runway temperature measuring device |
| CN113074817B (en) * | 2021-03-29 | 2022-06-10 | 中国航发长江动力有限公司 | Graphite sealing runway temperature measuring device |
| CN114894464A (en) * | 2022-07-13 | 2022-08-12 | 江苏金鹰流体机械有限公司 | Detection device is used in machining of mechanical seal |
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