4results about How to "Avoid premature wear" patented technology

This invention discloses a method and system for classifying and assessing lubricating oil contamination levels, as well as a storage medium. The method includes the following steps: acquiring lubricating oil samples from multiple operating machines; preprocessing the lubricating oil samples to obtain samples to be tested; extracting metal particles and colloids from the samples to construct a contamination feature dataset; analyzing the viscous substance content in the contamination feature dataset to obtain the comprehensive correlation between the flow rate, velocity, and pressure of the lubricating oil sample, as well as the clogging risk threshold value of the viscous substance content; calculating the clogging risk probability value for each operating machine using the comprehensive correlation and the clogging risk threshold value; and analyzing the contamination source classification results of metal particle clogging in the operating machines using the clogging risk probability value. By classifying the contamination sources of metal particles, more targeted lubricating oil detection can be performed on the machines, identifying lubricating oil anomalies.

The utility model discloses a high-temperature and high-pressure hard sealing three-eccentric center butterfly valve, and relates to the field of butterfly valves. In petrochemical engineering, electric power and other high-temperature and high-pressure industrial scenes, a traditional butterfly valve has the problems of sealing failure, large friction torque, influence of thermal expansion on pre-tightening force and the like. The three-eccentric butterfly valve comprises a valve body, a valve rod, a valve plate, a valve seat and a bottom end cover, the axis of the valve plate, the axis of the valve rod and the sealing face of the valve seat form a three-eccentric structure, the valve plate comprises a plate body, a metal winding gasket, an elastic sealing ring and a pressing ring, and the outer circumferential face of the elastic sealing ring and the inner circumferential face of the valve seat serve as sealing faces for closing the butterfly valve. Zero-friction contact type sealing is achieved in the closing process of the valve through the three-eccentric structure, the sealing life is greatly prolonged, the opening and closing torque is reduced, the leakage problem caused by uneven sealing and machining errors of a traditional butterfly valve is solved through the double-sealing combination of the metal winding gasket and the elastic sealing ring, and the sealing performance of the butterfly valve is improved. The sealing stability and reliability are effectively improved, and the service life is prolonged.

The utility model provides a bearing chamber respirator which comprises a shell unit, a first air inlet and a second air outlet, the shell unit comprises a first shell and a second shell which communicate with each other, the first shell is detachably installed on a connector of a bearing chamber, a gas channel communicating with the bearing chamber is formed in the first shell, and a breathing opening communicating with the outside is formed in the second shell; the filtering unit comprises a filtering piece mounted in the gas channel; the adjusting unit comprises a balance valve, the balance valve is arranged in the first shell or the second shell and divides the shell unit into a first cavity and a second cavity which are adjustably spaced, the first cavity is communicated with the bearing chamber, the second cavity is communicated with the breathing opening, and the first cavity is communicated with the bearing chamber. And when pressure difference exists between the bearing chamber and the breathing opening, the balance valve is opened. According to the bearing chamber respirator, external pollutants are prevented from entering the bearing chamber, and air pressure balance between the bearing chamber and the external environment is effectively controlled.

The utility model relates to a variable pitch mechanism, paddle hub assembly, rotor mechanism and aircraft, relate to aircraft technical field to solve the problem of complex, inconvenient maintenance or lubrication management complex of multi-bearing combination assembly in the prior art. The utility model's variable pitch mechanism, including variable pitch hinge support piece, paddle clip shell and transmission assembly, transmission assembly sets up between variable pitch hinge support piece and paddle clip shell, transmission assembly includes tapered roller bearing and bearing lubrication passageway, bearing lubrication passageway provides lubricating oil to tapered roller bearing, and tapered roller bearing provides axial and radial collaborative load for the relative motion of variable pitch hinge support piece and paddle clip shell. The utility model passes through tapered roller bearing, effectively deals with the composite load produced in the variable pitch process, and bearing lubrication passageway can continuously provide lubricating oil to tapered roller bearing, reduces friction loss, prolongs bearing service life, and improves the operation stability and reliability of variable pitch mechanism.