news

Measures to prevent the temperature rise of INA turbocharger bearings

Update:09-03-2021
Abst:

In daily production activities, we often encounter such […]

In daily production activities, we often encounter such a problem: the bearing temperature rises sharply after the machine runs for a short time. High temperature is harmful to some bearings. What causes the temperature rise? Let's explain it below.

Reasons for bearing temperature rise:
1. Breakthrough of cooling water for turbocharger bearings.
2. Degradation of engine oil, oil, or running your own dirty oil, such as oil in water, will cause oil to increase acidity, reduce oil lubrication, corrosion of imported bearings, and cause bearing temperature.
When the temperature of INA bearings rises, first determine whether they are malfunctioning. If they really rise, the following treatments should be done:
1. Check that the pressure, flow rate and piping system of the cooling water are normal. The filtered filter may be blocked and cannot be processed. It can confirm the work when it stops processing, and then put it into use.
2. The oil pressure of the governor should be checked. The oil pressure may cause the hydraulic valve to close if the water is cooled.
3. Whether there is a difference, whether there is any abnormal sound, check the supercharger bearing and bearing bounce test.
4. Take an oil sample to observe the change in the color of the oil, and conduct a test to see if it deteriorates. If it proves to be deteriorated, it should be replaced with new oil and shut down.
5. Check whether the oil level is normal. If not, check that the water tank drain valve is tightly closed. If it is closed, oil should be added, and if the gasket is breathable, the treatment should be stopped.


When we use imported bearings, if a person finds it is under high temperature, then quickly stop the operation of the equipment, and then find out the reason and provide a solution, in accordance with the above treatment, but may be due to different reasons, the supercharger bearing heat, so Solved in different ways, so we should put it under specific conditions and complete with the help of technicians.

Reasonably select and fill lubricating oil. In the process of use, lubricating oil with low oil film surface tension should be selected to reduce the impact of the oil flow when the formed bubbles collapse, which can effectively prevent INA bearing cavitation; the viscosity level of the lubricating oil should not be increased at will, so as not to increase The coking tendency of the bearing; the lubricating oil surface of the engine must be within the standard range, and the lubricating oil and refueling tools must be clean to prevent any dirt and water from entering, while ensuring the sealing effect of all parts of the engine. Pay attention to regular inspection and replacement of lubricating oil; the place where the lubricating oil is filled should be free of pollution and sand to prevent the intrusion of all pollutants; lubricating oils of different qualities, different viscosity grades and different types of use are prohibited from mixing. The precipitation time should generally not be less than 48h.

Use and maintain the engine properly. When installing the bearing, apply the specified brand of clean engine oil to the moving surface of the shaft and turbocharger bearing. After the turbocharger bearing is installed, turn off the fuel switch before starting for the first time, use the starter to drive the engine to idling several times, turn on and turn on the fuel switch when the engine oil pressure gauge shows, and place the throttle in the low-to-medium speed position. , Start the engine and observe the operation. The idle running time cannot exceed 5 minutes. Perform the running-in operation of the engine during the running-in period of the new engine and after overhaul. During the running-in period, it is forbidden to work for a long time under the condition of rapid load increase and decrease and high speed. It can be stopped after running at medium and low speed for 15 minutes, otherwise the internal heat will not be dissipated. Strictly control the start-up temperature of the locomotive and increase the start-up fuel supply time. In winter, in addition to strictly controlling the starting temperature of the locomotive, the oil supply time should also be increased to ensure that the oil reaches the friction pairs of the diesel engine and minimize the mixed friction of the friction pairs when the diesel engine starts. Replacement of the oil filter. When the pressure difference between the front and rear of the oil filter reaches 0.8MPa, replace it. At the same time, in order to ensure the filtering effect of the oil, the oil filter is replaced regularly to reduce the impurity content in the oil. Strengthen the cleaning and maintenance of the oil filter and crankcase ventilation device, and replace the filter element in time according to the instructions; ensure the normal operation of the engine cooling system, control the normal temperature of the engine, prevent the radiator from "boiling", and it is strictly forbidden to drive without adding cooling water ; Correct selection of fuel, accurate adjustment of gas distribution phase and ignition timing, etc., to prevent abnormal combustion of the engine: timely check and adjust the technical conditions of the crankshaft and INA bearings. Regularly conduct engine oil ferrography analysis to reduce accidents. Combined with engine oil ferrography analysis, abnormal wear can be found early. According to the oil ferrography analysis pattern, the abrasive composition and possible locations can be accurately determined to prevent problems before they occur and avoid rubbing burns axis accident.

0
Contact Us