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New method for INA bearing heating device

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There are two common ways to replace INA bearings: one is to directly heat the bearing with acetylene oxygen, the other is to use oil immersion heating for small bearings; to reach thermal expansion; to expand the inner diameter of the bearing; It has been widely used in long-term equipment repair; it is fundamentally satisfactory and has dealt with the bearing device problems in equipment repair. But these two methods can ensure the uniformity of the temperature value of the heated area of ​​the bearing during the heating process; it is difficult to determine. Because the traditional acetylene oxygen heating is a single gas burner; and the heating process is only experienced; how much temperature is applied to the heated bearing temperature is difficult to grasp. The temperature is too high; the bearing will be annealed; the bearing will be lowered Mechanical properties, temperature is too low; thermal expansion value is not good; difficult to install. In equipment repair; repairers sometimes do not heat the bearings; INA bearings can not be installed in the correct orientation; must have been forced to reload; then increased labor Strength. To this end; we have proposed a modification to the traditional pair of bearings.
1. Electric heating instead of acetylene oxygen heating. The plane electric furnace is depicted as a cylindrical electric furnace; named as INA bearing electric heater; according to different bearing inner diameter can be described as different power and standard bearing electric heater ( The best application range is φ300mm/above bearing diameter. This heating equipment has the following advantages: uniform heat radiation and stability; smoked dust on the outside of the heated bearing, hygienic and clean; easy to measure and control the temperature of the INA bearing.
2. The infrared thermometer is used to monitor the temperature of the heated INA bearing. The heating value of the bearing device is usually controlled at 100 °C ~ 120 °C. Within this temperature value; the thermal expansion value of the bearing steel is the largest; easy to INA bearing device; This temperature value does not change the mechanical properties of the bearing; and the reliability is high.
In summary, the INA bearing electric heater is superior to the traditional acetylene oxygen heating; it is a useful method to improve the precision and working efficiency of the bearing device and reduce the labor intensity.
1. One way to improve the accuracy of INA bearings is to produce a beautiful instrument; the main shaft uses the 6202/P2 type bearing and its accuracy is still not satisfactory; the rear journal is thickened and the raceway is made on it to replace the inner ring; Fine measurement; every three sets of scales; each set of steel balls takes a distance of nearly 120°; because it adds a heavy processing appearance; it adds a cooperation appearance; together, it has improved the shaft and INA bearing system. Stiffness; and the maximum three particles and the smallest three steel balls are nearly equidistantly spread; the axis reversal accuracy is improved; so the accuracy requirement of the instrument is satisfied.
2. Accuracy improvement method INA bearing in the host after the end of the device; such as measuring the radial runout of the spindle; can be found that each of the measured values ​​have a certain change, measured in succession; can be found after passing a certain number of revolutions; this change It will be approximately repeated. The target for measuring the degree of change is the cycle rotation precision; changing the number of revolutions required for approximately repeated presentation represents the "quasi-period" of the cycle rotation accuracy; the magnitude of the magnitude change in the quasi-period is large; That is, the cycle rotation accuracy is poor.
For example, the preload is properly applied to the main shaft; the rotational speed is gradually reduced to the near-responsible rotational speed; the "run-in" effect of the INA bearing is implemented; the cyclic rotation accuracy of the main shaft can be improved.

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Car engines are designed around sealed, resilient metal cylinders. Most modern vehicles have between four and eight cylinders, though some vehicles can have as many as sixteen! The cylinders are made to open and close at precisely the correct time to bring in fuel to combine with the spark for burning internally, and to release the exhaust gases produced. While there are several components on an engine, we`ve compiled a list of the most essential car engine parts and their functions, that power your vehicle. Refer to the diagram to locate where they reside on your engine.

Engine valve – This is the very core of the engine. Often made of aluminum or iron, it has several holes to contain the cylinders as well as provide water and oil flow paths to cool and lubricate the engine. Oil paths are narrower than the water flow paths. The engine block also houses the pistons, crankshaft, camshaft, and between four and twelve cylinders-depending on the vehicle, in a line, also known as inline, flat or in the shape of a V.

Pistons – Are a cylindrical apparatus with a flat surface on top. The role of the piston is to transfer energy created from combustion to the crankshaft to propel the vehicle. Pistons travel up and down within the cylinder twice during each rotation of the crankshaft. Pistons on engines that rotate at 1250 RPM, will travel up and down 2500 times per minute. Inside the piston, lie piston rings that are made to help create compression and reduce the friction from the constant rubbing of the cylinder.

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Timing Belt/Chain – The camshaft and crankshafts are synchronized to ensure the precise timing in order for the engine to run properly. The belt is made of a heavy-duty rubber with cogs to grasp the pulleys from the camshaft and crankshaft. The chain, similar to your bicycle chain wraps around pulleys with teeth.

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