CN107101784A - Experimental rig for simulating the lip envelope of monitoring particulate matter intrusion rotation in real time under wind sand environment - Google Patents

Abstract

It is a kind of to be used to simulate the experimental rig of the lip envelope of monitoring particulate matter intrusion rotation in real time under wind sand environment, including rotation lip envelope system, wind sand environment simulation system and visualizing monitor system, rotate in lip envelope system, dielectric cavity one end is provided with lip-type seal, the dielectric cavity other end is connected with adjustable speed variable-frequency motor, hollow transparent axle is placed in dielectric cavity, and hollow transparent axle one end and lip-type seal lip Elastic Contact, the other end of hollow transparent axle are fixed by the saddle support being fixed on pedestal；The dust storm outlet of wind sand environment simulation system is positioned at hollow transparent axle one end and the sealing surface of lip-type seal, and sealing surface is located in the visual range of visualizing monitor system.Cost of the present invention is low, easy for installation, the sealing property and service life that lip envelope is rotated under wind sand environment can be simulated, the damage process of dust storm erosion environment destruction rotation lip envelope more can be more truly simulated, and the process for rotating lip envelope can be invaded by monitoring of environmental particulate matter in real time.

Description

Experiment for real-time monitoring of particle intrusion into rotary lip seal in simulated sandstorm environment device

technical field

The invention relates to a rotary lip seal test technology for simulating work in a sandstorm environment, in particular to a test device for real-time monitoring of the intrusion of environmental particles into a rotary lip seal.

Background technique

Sealing devices are key core components in the equipment manufacturing industry, and often directly determine the performance, quality and reliability of major equipment and main engines. Once the seal fails, it will cause lubricant deterioration or leakage, increase machine wear, power consumption and shorten its service life, cause environmental pollution or corrosion of equipment, and cause serious accidents such as fire and explosion or even personal safety. Rotary shaft lip seal (referred to as lip seal) is widely used in aerospace, transportation, petrochemical and biopharmaceutical fields due to its compact structure, low price and reliable performance. It relies on working pressure (including preload and Medium pressure) acts on the lip, so that the lip presses the sealing coupling surface to achieve the sealing effect. It is an important barrier to prevent the lubricant from leaking and resist the intrusion of pollutants.

Rotary lip seals are often exposed to the external environment, forced to serve in various sand and dust environments such as wind and sand, dust and smog, and withstand harsh tests. Actual use shows that abrasive wear is one of the main reasons for premature failure of rubber seals in addition to installation, improper use and rubber aging. However, the wear mechanism and failure mechanism of the particle-induced rotary lip seal failure in sand and dust environment, and the influence of particle morphology characteristics on the failure of the rotary lip seal still need to be further explored. On the other hand, realizing the real-time monitoring and tracing of particulate matter in the external environment into the rotary lip seal can provide a theoretical basis for evaluating lip seals serving in dusty environments. Therefore, a real-time monitoring and tracing device for the intrusion of external environmental particles into the rotary lip seal is particularly important.

At present, some progress has been made in the life prediction of lip seals and the analysis of oil film characteristics in the contact area at home and abroad. For example, patent [CN103411761A] discloses a test bench for studying the life of lip seals; patent [CN103033353A] discloses a test device for oil film characteristics in the contact area of lip seals. However, many works related to the investigation of the sealing performance and service life of rotary lip seals in windy and sandy environments still need to be resolved urgently. However, there is still a lack of effective technical means for the sealing performance test of the particles immersed in the rotary lip seal in the sandstorm environment and the real-time monitoring and tracking of the particle movement characteristics.

Contents of the invention

In order to overcome the deficiency that the existing technology cannot realize the sealing performance test by immersing particles into the rotary lip seal in a sandstorm environment, the present invention provides a test device for real-time monitoring of particulate matter intrusion into a rotary lip seal in a simulated sandstorm environment. The system truly simulates the actual wind and sand environment and is combined with the visual monitoring system and data acquisition and control system to comprehensively evaluate the sealing performance and service life of the rotary lip seal, which can more realistically simulate the damage process of the rotary lip seal damaged by the wind and sand erosion environment, and The process of intrusion of environmental particles into the rotary lip seal can be monitored in real time.

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

A test device for real-time monitoring of particle intrusion into a rotary lip seal in a simulated sandstorm environment, the test device includes a rotary lip seal system 1, a sandstorm environment simulation system 2 and a visual monitoring system 3, the rotary lip seal system 1 includes a medium cavity 1b, lip seal 1g, lip seal cover plate 1c, hollow transparent shaft 1f and adjustable speed variable frequency motor 1j, one end of the medium cavity 1b is equipped with a lip seal 1g, the other end of the medium cavity 1b is connected to an adjustable speed The frequency conversion motor 1j is connected, the hollow transparent shaft 1f is placed in the medium chamber 1b, one end of the hollow transparent shaft 1f is in elastic contact with the lips of the lip seal 1g, and the other end of the hollow transparent shaft 1f is fixed on the base The saddle support 1i is fixed;

The wind and sand outlet of the wind and sand environment simulation system 2 is located on the sealing surface between one end of the hollow transparent shaft 1f and the lip seal 1g, and the sealing surface is located within the visual range of the visual monitoring system 3 .

Further, the hollow transparent shaft 1f is on the same straight line as the center axis of rotation of the lip seal 1g, the medium cavity 1b and the adjustable-speed variable-frequency motor shaft 1j.

Further, in the sandstorm circulation simulation system 2, the sandstorm chamber 2a, the circulating fan 2b and the connecting pipe 2c, the sandstorm chamber 2a is a semi-closed structure, and its opening side communicates with the air side of the rotating lip seal, and the sandstorm chamber 2a is respectively opened up and down. There is an air inlet 2a ₁ and an air outlet 2a ₂ , and the air inlet 2a ₁ and the air outlet 2a ₂ are connected to the circulation fan 2b through the communication pipe 2c.

Described visual monitoring system 3 high-speed CCD camera 3c, plane mirror 3b and spotlight 3a, described spotlight 3a is aimed at lip seal 1g topmost lip position, plane mirror 3b adjusts the set angle and ensures high-speed CCD camera 3c to pass through by changing the optical path The hollow transparent shaft 1f can photograph the sealing surface on which the spotlight 3a is aimed.

The test device also includes a data acquisition and control system 4. The data acquisition and control system 4 includes a data acquisition system industrial computer 4a and a dynamic torque sensor 4b. The variable-frequency motor 1j is connected; the adjustable-speed variable-frequency motor 1j is electrically connected to the data acquisition and control system 4 to realize controllable speed and action time of the variable-frequency motor.

The circulation blower 2b is electrically connected with the data acquisition and control system 4, so as to realize the controllable wind speed and flow rate in the sandstorm circulation simulation system.

The high-speed CCD camera is electrically connected with the data acquisition and control system 4 to realize real-time monitoring of the sealing surface of the uppermost lip of the lip seal 1g.

A vent hole 1a and an oil injection hole 1d are respectively drilled in the medium chamber 1b.

The sand used in the device of the present invention is taken from different windy sand areas, and sands of different specifications are mixed in a certain proportion.

The test device of the present invention is not only low in cost and easy to install, but also can simulate the sealing performance and service life of the rotary lip seal in a wind-sand environment, more realistically simulate the damage process of the rotary lip seal in a wind-sand erosion environment, and can monitor the intrusion of environmental particles in real time The process of the rotary lip seal is of great significance for testing the anti-sand wear resistance of the rotary lip seal and improving the service life of the rotary lip seal.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a perspective view of the wind-sand chamber of the present invention.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, a test device for real-time monitoring of particle intrusion into a rotary lip seal in a simulated sandstorm environment, the test device includes a rotary lip seal system 1, a sandstorm environment simulation system 2 and a visual monitoring system 3, the The rotary lip seal system 1 includes a medium chamber 1b, a lip seal 1g, a lip seal cover plate 1c, a hollow transparent shaft 1f and an adjustable-speed variable-frequency motor 1j. A lip seal 1g is installed at one end of the medium chamber 1b, and the medium chamber The other end of 1b is connected to an adjustable-speed variable-frequency motor 1j, the hollow transparent shaft 1f is placed in the medium chamber 1b, one end of the hollow transparent shaft 1f is in elastic contact with the lip of the lip seal 1g, and the other end of the hollow transparent shaft 1f One end is fixed by a saddle support 1i fixed on the base;

The wind and sand outlet of the wind and sand environment simulation system 2 is located on the sealing surface between one end of the hollow transparent shaft 1f and the lip seal 1g, and the sealing surface is located within the visual range of the visual monitoring system 3 .

Further, in the sandstorm circulation simulation system 2, the sandstorm chamber 2a, the circulating fan 2b and the connecting pipe 2c, the sandstorm chamber 2a is a semi-closed structure, its opening side communicates with the air side of the rotating lip seal, and the sandstorm chamber 2a is provided with _The air inlet 2a ₁ and the air outlet 2a ₂ are connected to the circulation fan _2b through the communication pipe 2c.

Described visual monitoring system 3 high-speed CCD camera 3c, plane mirror 3b and spotlight 3a, described spotlight 3a is aimed at lip seal 1g topmost lip position, plane mirror 3b adjusts the set angle and ensures high-speed CCD camera 3c to pass through by changing the optical path The hollow transparent shaft 1f can photograph the sealing surface on which the spotlight 3a is aimed.

The test device also includes a data acquisition and control system 4. The data acquisition and control system 4 includes a data acquisition system industrial computer 4a and a dynamic torque sensor 4b. The variable-frequency motor 1j is connected; the adjustable-speed variable-frequency motor 1j is electrically connected to the data acquisition and control system 4 to realize controllable speed and action time of the variable-frequency motor.

The circulation blower 2b is electrically connected with the data acquisition and control system 4, so as to realize the controllable wind speed and flow rate in the sandstorm circulation simulation system. The high-speed CCD camera is electrically connected with the data acquisition and control system 4 to realize real-time monitoring of the sealing surface of the uppermost lip of the lip seal 1g.

The body of the adjustable-speed variable-frequency motor 1j is fixed on the base by bolts. The saddle-type support 1i on the seat is fixed and guaranteed to be coaxial with the adjustable-speed variable-frequency motor 1j medium cavity 1b. The air vent hole 1a and the oil injection hole 1d are respectively drilled in the medium chamber 1b, and the rotating lip seal 1g is installed between the medium chamber 1b and the hollow transparent shaft 1f in an elastic contact manner and is fixed by the lip seal cover plate 1c. The wind-sand chamber 2a, the circulation fan 2b and the connecting pipe 2a are used to simulate the actual wind-sand environment. The spotlight 3a, the plane mirror 3b and the high-speed CCD camera 3c are respectively fixed on the L-shaped bracket 3d, the spotlight 3a is aimed at the uppermost lip of the lip seal 1g, and the plane mirror 3b is adjusted to a certain angle by changing the optical path to ensure that the high-speed CCD camera 3c passes through the hollow transparent shaft 1f can photograph the sealing surface aimed at by the spotlight 3a, and the information photographed by the high-speed CCD camera 3c is transmitted to the industrial computer 4a to realize visual monitoring.

As shown in Figure 2, a felt sealing ring 2a3 is installed on the contact part between the shell side of the wind-sand chamber 2a and the lip seal cover plate 1c, and a felt seal ring 2a4 is also installed on the inner shell side of the wind-sand chamber 2a and the contact part of the hollow transparent shaft 1f to prevent wind and sand from entering the wind-sand chamber. Part 2a leaks.

The working principle of the present invention is: after the installation of the test bench is completed, oil is injected into the medium cavity 1b through the oil injection hole 1d, and the air is discharged through the exhaust hole 1a until the entire medium cavity 1b is filled, and then the oil injection hole 1d and the exhaust hole 1a are sealed. Turn on the circulation fan 2b to simulate the actual wind and sand environment, so that the wind and sand particles are immersed in the rotating lip seal 1g, the spotlight 3a is aimed at the uppermost lip of the lip seal 1g, and the plane mirror 3b is adjusted to a certain angle by changing the optical path to ensure that the high-speed CCD camera 3c passes through the hollow transparent shaft 1f can photograph the sealing surface aimed at by the spotlight 3a, and the adjustable-speed variable-frequency motor 1j is energized to rotate, and the dynamic torque sensor 4b drives the medium chamber 1b to rotate. The high-speed CCD camera is electrically connected with the data acquisition and control system 4 to realize the real-time monitoring of the sealing surface of the uppermost lip part of the lip seal 1g, and the captured information and the data measured by the dynamic torque sensor 4b are transmitted to the industrial computer 4a for display. In order to achieve the real simulation of the damage process of the wind and sand erosion environment destroying the rotary lip seal and the real-time monitoring of the process of environmental particles intruding into the rotary lip seal to achieve the experimental purpose.

The device of the invention monitors the trajectory of particles entering the rotary lip seal in real time, and analyzes the process of environmental particles intruding into the rotary lip seal through an industrial computer by using the statistical principle of the trace method.

In summary, by using the test bench of the present invention, the intrusion of particulate matter into the rotary lip seal under different sandstorm environments can be realized by changing the power simulation of the star feeder, and the process of particle intrusion into the rotary lip seal under different environments can be monitored in real time. The evaluation of the sealing performance and service life of the rotary lip seal under the environment, as well as the structural design of the rotary lip seal provide a theoretical basis.

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also includes those skilled in the art. Equivalent technical means conceivable according to the concept of the present invention.

Claims (8)

1. A test device for real-time monitoring of particulate matter intrusion into a rotary lip seal under simulated wind and sand environment, characterized in that: said test device includes a rotary lip seal system (1), a wind and sand environment simulation system (2) and a visual monitoring system ( 3), the rotary lip seal system (1) includes a medium chamber (1b), a lip seal (1g), a lip seal cover plate (1c), a hollow transparent shaft (1f) and an adjustable speed variable frequency motor (1j), A lip seal (1g) is installed at one end of the medium cavity (1b), the other end of the medium cavity (1b) is connected to an adjustable-speed variable-frequency motor (1j), and the hollow transparent shaft (1f) is placed in the medium cavity ( In 1b), one end of the hollow transparent shaft (1f) is in elastic contact with the lip of the lip seal (1g), and the other end of the hollow transparent shaft (1f) is fixed on the base by a saddle support (1i) fixed; The wind and sand outlet of the wind and sand environment simulation system (2) is located on the sealing surface between one end of the hollow transparent shaft (1f) and the lip seal (1g), and the sealing surface is located within the visual range of the visual monitoring system (3) . 2. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under simulated sandstorm environment according to claim 1, characterized in that: the hollow transparent shaft (1f) is connected with the lip seal (1g), the medium cavity ( 1b) is on the same straight line as the central axis of rotation of the adjustable-speed variable-frequency motor shaft (1j). 3. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under simulated wind-sand environment according to claim 1 or 2, characterized in that: the wind-sand cycle simulation system (2), wind-sand chamber (2a), circulation fan (2b) and the connecting pipe (2c), the sand blowing chamber (2a) is a semi-closed structure, its opening side communicates with the air side of the rotating lip seal, and the sand blowing chamber (2a) is provided with air inlets (2a ₁ ) and outlets on the upper and lower sides. The air outlet (2a ₂ ), the air inlet (2a ₁ ) and the air outlet (2a ₂ ) are connected to the circulation fan (2b) through the communication pipe (2c). 4. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under simulated wind and sand environment according to claim 1 or 2, characterized in that: described visual monitoring system (3) high-speed CCD camera (3c), plane mirror ( 3b) and a spotlight (3a), the spotlight (3a) is aimed at the uppermost lip of the lip seal (1g), and the plane mirror (3b) is adjusted to set the angle by changing the light path to ensure that the high-speed CCD camera (3c) is transparent through the hollow The shaft (1f) captures the sealing surface on which the spotlight (3a) is aimed. 5. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under simulated wind and sand environment according to claim 1 or 2, characterized in that: the test device also includes a data acquisition and control system (4), the data The acquisition and control system (4) includes a data acquisition system industrial computer (4a) and a dynamic torque sensor (4b), and the other end of the medium chamber (1b) is connected to an adjustable-speed variable-frequency motor (1j) via the dynamic torque sensor (4b) ; The adjustable-speed variable-frequency motor (1j) is electrically connected to the data acquisition and control system (4), so as to realize controllable speed and action time of the variable-frequency motor. 6. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under the simulated sandstorm environment according to claim 3, characterized in that: the test device also includes a data acquisition and control system (4), and the data acquisition and control system (4) The control system (4) includes a data acquisition system industrial computer (4a) and a dynamic torque sensor (4b), and the other end of the medium cavity (1b) is connected to an adjustable-speed variable-frequency motor (1j) via the dynamic torque sensor (4b); The adjustable-speed variable-frequency motor (1j) is electrically connected to the data acquisition and control system (4) to realize controllable speed and action time of the variable-frequency motor; the circulating fan (2b) is electrically connected to the data acquisition and control system (4) , in order to realize the controllability of wind speed and flow in the wind-sand circulation simulation system. 7. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal under the simulated sandstorm environment according to claim 3, characterized in that: the test device also includes a data acquisition and control system (4), and the data acquisition and control system (4) The control system (4) includes a data acquisition system industrial computer (4a) and a dynamic torque sensor (4b), and the other end of the medium cavity (1b) is connected to an adjustable-speed variable-frequency motor (1j) via the dynamic torque sensor (4b); The adjustable-speed variable-frequency motor (1j) is electrically connected to the data acquisition and control system (4) to realize the controllable speed and action time of the variable-frequency motor; the high-speed CCD camera is electrically connected to the data acquisition and control system (4) to Realize real-time monitoring of the sealing surface of the uppermost lip of the lip seal (1g). 8. The test device for real-time monitoring of particulate matter intrusion into the rotary lip seal in a simulated sandstorm environment according to claim 1 or 2, characterized in that: the medium chamber (1b) is respectively drilled with an exhaust hole (1a) and oil injection hole (1d).