High-pressure large-scale gap dynamic sealing performance testing device and system

Abstract

The invention belongs to the technical field related to sealing technologies, and discloses a high-pressure large-scale gap dynamic sealing performance testing device and system. The device comprisesa cylinder body, a first plunger rod, a second plunger rod and a piston rod, wherein a first chamber is formed between the tail end of the first plunger rod and the cylinder body, a second chamber isformed between the tail end of the second plunger rod and the cylinder body, high-pressure liquid is arranged in the first chamber and the second chamber, and the two chambers communicate with each other; and the piston rod drives the first plunger rod and the second plunger rod to reciprocate left and right under the driving of a driving device, plunger sleeves are arranged outside the first plunger rod and the second plunger rod, leakage openings are formed in the plunger sleeves, and when the first plunger rod and the second plunger rod reciprocate, the high-pressure liquid in the first chamber and the second chamber leaks from the leakage openings, the leaked high-pressure liquid is measured, and then the sealing performance is tested. According to the device and the system, the liquidleakage amount of a plunger pump can be measured in a low-power and low-cost simulation mode.

Description

technical field [0001] The invention belongs to the related technical field of sealing technology, and more specifically relates to a high-pressure large-scale gap dynamic sealing performance testing device and system. Background technique [0002] In recent years, with the development of science and technology, in the field of sealing, gap sealing has been more and more widely studied. Gap seal is a non-contact seal that combines circumferential gap seal and axial end face seal. It relies on the tiny gap between relative moving parts to suppress leakage and seal. It is the simplest form of seal. The performance of the seal depends on It depends on the size of the gap, the length of the seal, the surface quality of the parts, the pressure difference, the viscosity of the fluid and other factors. [0003] At present, most of the high-pressure and large-flow reciprocating plunger pumps use soft sealing materials made of rubber or engineering plastics. For contact seals, due t...

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Problems solved by technology

[0003] At present, most high-pressure and high-flow reciprocating plunger pumps use soft sealing materials made of rubber or engineering plastics. For contact seals, due to the close fit between the plunger and the seal, huge friction will be generated. Causes serious heating and damage to the seal, which needs to be replaced frequently

With the high pressure and large scale of the plunger pump, the pv value of the friction pair can easily exceed the capability limit of the soft seal packing, resulting in a short seal life

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