All overhaul of the vacuum pump is called overhaul. Some vacuum pumps, which have failed to eliminate the malfunction due to the partial dismantling measures, still have low vacuum and leakage. Some pumps have one of the following phenomena: Stuck, the oil is dirty and the pump has become encrusted, rusty or improperly oiling the hard parts inside the mechanical pump (this can happen when the silicone oil enters the mechanical pump) , Rotary vane has a larger percussion sound, the pump chamber into the foreign body (metal shavings, glass crumbs, copper scrap, etc.) scratch the pump chamber, friction heat temperature is very good (over 70 ℃), etc., All open for cleaning and repair. Disassembly of the mechanical pump steps and precautions are as follows ①cut off the power, unplug the power plug. The pump, if on the system, should be removed from the equipment. ② unscrew the oil drain bolt, hand-drive pulley, so that all the oil chamber pump release. Oil should be collected, usually in the mechanical pump floor put an iron pan or disk, etc. (commonly known as square pan) collection, in order to facilitate future distillation and recycling from pollution of the environment. ③ remove the belt, remove the pulley, key, disengage the bottom plate, depending on the degree of motor (such as fever, over-dirty, dry grinding noise, vibration, etc.) should be repaired or sentinel wash oil repair. ④ Remove the vacuum end cover (back cover, that is, away from the end of the pump), remove different tools according to different screws. For general hex screws can be used wrenches, hex screws need to use hex wrench, if necessary, to use socket wrench, so will not damage the screws. After unscrewing the end cover screw, gently open the end cover. If the end cover close tight, you should slowly try to start. For example, a file can be used to file a small slot at the joint between the pump chamber and the end cover, then a screwdriver (screwdriver) is inserted into the small slot to handle the handle of the child by hand, or a screwdriver can be used to tap the driver to exit the end cover Do not hammer heavy hammer. ⑤ with a rubber gasket seal is removed rubber gasket, exit the pin. ⑥ remove the rotor and rotary plate. Usually at the low rotor end and has two tapping screw tapping screwed into this larvae dagger it is easy to pull out the low rotor. However, we must pay attention to pull out the rotor must be squeezed by hand rotary blade, the rotary blade by the spring force larger, a small self-easy to fly off, fell to the ground or hit the hard object, hit the rotary edges and corners and the surface Resulting in unprovoked report ⑦ ⑦, ⑤, ⑥ the same way to remove the high vacuum side, take out the high rotor and rotary plate. At this point, simply squeeze the rotary knob and the shaft to remove the rotor. ⑧ Before disassembling the pump, you should understand in advance the structural characteristics of the pump to be disassembled, and what kind of structure the parts are. For example, for those parts belonging to the assembly itself, such as rotors of some rotary vane pumps, do not disassemble and make appropriate corrections and adjustments to their surfaces; if the combination rotor falls into glass chips, metal foreign bodies will damage the cavity Or the rotary vane slot has been worn too much, you need to replace the accessories, then removable, but be careful to remember the assembly method. ⑨ each removed a part, we must check its accuracy and finish as well as damage. Spin the rotor and the two corners of the rotor to pay special attention to check for any damage, and make a record. Repair business is not yet familiar with the pump, you should also gradually remember the parts, parts of the original configuration, make a record, in case you can not remember when reinstalling wrong. At the same time, remove the parts can not be arbitrary, heaping, bumps, lost. Put it in a square disk best, but also can be placed in the wooden box and clean, covered with silk cloth (in the absence of silk, at least to be covered with glossy white paper).
