Mechanical sealing testing device and method for experimental teaching

Abstract

The invention discloses a mechanical sealing testing device and method for experimental teaching, and belongs to the technical field of sealing testing. The mechanical sealing testing device comprisesa rack, a computer, a motor, a torque rotating speed measuring instrument, a bearing pedestal, a transmission shaft, a sealing cavity, an oil tank, a bidirectional hydraulic pump and a pipeline; thecomputer, the motor, the torque rotating speed measuring instrument, the bearing pedestal, the transmission shaft and the sealing cavity are mounted on the rack; the motor, the torque rotating speed measuring instrument and the transmission shaft are connected in sequence; the transmission shaft is connected with the sealing cavity through a cotter pin and a convex key; the opening position is connected with an oil inlet and an oil outlet of the sealing cavity through the pipeline; the rack is further provided with the bidirectional hydraulic pump and the oil tank; and the oil tank, the bidirectional hydraulic pump and the sealing cavity are sequentially connected into a loop through the pipelines. The sealing performance of the testing device is improved, the dismounting convenience of the device in the sealing cavity is improved, the replaceable design is realized, and the experimental test can be performed for more mechanical sealing devices.

Description

technical field [0001] The invention belongs to the technical field of sealing testing, in particular to a mechanical sealing performance testing device and method suitable for teaching experiments. Background technique [0002] Mechanical seal is one of the main means of rotary shaft seal, which is widely used in industrial production process. In industrial production, due to its advantages of less leakage, reliable sealing performance, small friction loss, and long life, mechanical seals are widely used in the sealing of rotating shafts including reactors, centrifugal pumps, and centrifuges. Mechanical seal test is the main way and means to evaluate the performance of the mechanical seal. Improving the understanding of mechanical seals has a great effect on improving the teaching effect of mechanical majors. In the teaching process, it is necessary to use relevant experimental equipment so that students can feel the effect of the equipment itself more intuitively. [000...

AI Technical Summary

Problems solved by technology

At present, there have been some experimental equipment on the market for mechanical seal performance testing, but the current experimental equipment is complex in structure and troublesome to disassemble. It often takes a lot of time to replace the parts to be tested, and may cause damage to the parts. The technical requirements are also relatively high, and it is not necessary to carry out general experimental teaching

Moreover, the existing technical solutions are full of many uncertain factors during the experiment, and the high pressurization pressure of the sealed chamber may seriously affect the safety of the experimental equipment and operators. Some existing experimental equipment has realized computer control pressurized pressure, but did not take into account the occurrence of sudden high pressure that would lead to the rupture of the seal cavity, sudden failure of the seal, etc., which seriously threatened the safety of the experimental operators

At the same time, the mechanical seal mainly relies on the relative sliding between the moving ring and the static ring to form a liquid film to play a sealing role. However, most of the existing experimental equipment adopts invisible structures and materials, or partially visible structures, which are difficult to directly test The working condition of the sealing liquid film can be observed from the outside of the device, and it is also difficult to see the sealing condition of the sealing end face

In addition, the sealing performance testing devices provided by the prior art basically use a non-replaceable single-diameter spindle, which is only applicable to a sealing device with an axial size, does not have good versatility, and cannot be used for various diameters. The performance test of the mechanical seal can not test the influence of different diameters on the performance of the mechanical seal

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