RYB electric installation engages the gear pump coupling
RYB electric installation engages the gear pump coupling
One of the key hub in the assembly shaft couplings installed. Hub and shaft mostly with interference fit , coupled divided into key connection and keyless connection , shaft hole of the hub is divided into two forms cylindrical shaft hole and tapered shaft hole . Assembly methods are static pile into the method, dynamic penetration method , temperature assembly method and hydraulic assembly method.
Engagement (1) RYB internal gear pump electric static pile into law
This method is based on the different sizes of wheels pressed into force shaft assembly required items , using tongs , jacks, manual or motorized press conduct , static pile method is generally used for tapered shaft into the hole . Due to the pressure jacked into law received mechanical limitations, interference is larger, more difficult to exert great force . Meanwhile, in the process will be pressed into the uneven surfaces of the cut with a slight hump between the hub and the shaft , damage to the mating surfaces . Therefore, this method is generally applied much.
Power (2) RYB electric gear pump pressure into law
This method RYB gear pump assembly refers to the use of electric shocks in the tool or to the mechanical axis of the hub to complete the assembly process , generally used with the hub and the shaft or between the interference fit of the transition is not the case . Assembly site usually hand hammer method , the method is the hub of the end surface of the pad to put pieces of wood, lead weights or other soft material for cushioning member , relying on hand- hammer impact, the hub knock . This method of cast iron , a hardened steel , brittle materials such as cast alloy wheels, there is the risk of localized damage , should not be used . This approach will also damage the mating surface , the coupling is often used for low-speed and small assembly .
(3) RYB temperature difference between the electric gear pump assembly method
Methods RYB engaging internal gear pump assembly with an electric heating or thermal expansion of the hub with the shaft end by the method of cooling the cold shrink , so that the inner diameter is slightly larger than the shaft hole of the hub shaft end diameter , namely, to the so-called " easy to assemble value" , does not require a large force is applied , you can easily suit the hub onto the shaft . This approach than static pile into law , power push method has many advantages , for brittle materials with wheels, using the temperature difference between the assembly method is very suitable .
RYB electric temperature difference between the internal gear pump assembly assembly method mostly used method of heating and cooling method is relatively small. There are a variety of heating methods , some of the hub into a high flash point of the oil bath heated by oil or torch baking , and some use the oven to heat , the assembly site to use more oil bath heating and welding torch baking. In an oil bath heated to the highest temperature will depend upon the nature of the oil , generally below 200 ℃. Other heating methods using the hub , the hub may be a temperature higher than 200 ℃, but from the viewpoint of metallurgical and heat treatment , the heating temperature of the hub can not be arbitrarily increased, the recrystallization temperature of the steel was 430 ℃. If the heating temperature exceeds 430 ℃, can cause changes in the internal organization of the steel , and therefore must be less than the upper limit of the heating temperature of 430 ℃. For insurance , the heating temperature limit should be set for the following 400 ℃. As the hub actual heating temperature , can be calculated to the requirements of the hub shaft when heated according to package the hub and the shaft with an interference value and round.
( 4 ) Check the RYB electric gear pump after assembly
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