The assembly method of the combined
vacuum pump is slightly different from that of the integral type. For example,
the small five piece rotary vane pump is composed of the high and low end cover
plates, the high and low pump cavity plates and the middle diaphragm plates to
form the whole pump body. The assembly sequence is as follows.
First of
all, clamp the bottom of the middle diaphragm assembly piece upward on the long
vice (100 caliber, 220mm long), pay attention not to use too much force to crush
the sealing surface of each part. When clamping, two pieces of block iron less
than the thickness of the pump unit (about 10 mm thick) should be padded.
Because the high and low rotor shafts of this kind of pump work synchronously
through the cross joint at the shaft end, the high vacuum pump cavity group on
the pump wheel side should be installed first. The specific method is to install
the rotating plate and spring into the high rotor groove, pinch the rotating
plate into the pump cavity, and then, together with the assembly and rotor,
insert the shaft end with convex head into the shaft seal hole on the end cover
plate Insert the high-end two sets of pieces into the rotor shaft and fix them
on the middle clapboard with bolts. While tightening the bolts, rotate the
installed pump roller. When the bolts are not too tight, tap the end cover with
a small hammer to make the rotor and pump chamber natural diagonal square (at
right angle).
Then tighten the bolts with force, but it should be noted
that there should be no blockage when turning the pump wheel, and then install
another low vacuum end; the cross groove of the low rotor shaft end should be
tightly connected with the convex head of the high rotor extending through the
middle diaphragm. After installing the low end cover with the same method,
tighten it, and then tap the end cover with a hammer, and finally tighten the
bolt. At this time, it takes a lot of effort to rotate the pump wheel After a
few cycles of rotation, one hand should rotate, but there should be no local
wheel load blocking. Then, the two end covers should be disassembled again, and
the rotor should be taken out by grasping the rotating blade by hand. Carefully
observe whether there are uniform line scratches on the rotor. If there are, it
indicates that the assembly is appropriate.
If there is a black line at
one end of the rotor, it is necessary to further check whether there is taper at
both ends of the rotor or pump cavity. If both ends are the same size, it means
that the angle between the rotor and the pump cavity is not correct, and the
rotor is installed askew. According to the position of the black line on the
rotor, the correction effect can be corrected. After the installation, tap the
end cover gently, and then turn the belt pulley with both hands to see whether
there are local wheels If there is no trace of light scribing after the rotor is
removed, it means that the rotor is not close to the pump cavity at all. At this
time, the assembly pieces at both ends of the middle diaphragm should be raised
by one or two wires (only by reaming the four corner fastening bolt holes), so
that the pump cavity and the rotor are close. If no other problems are found,
apply insect glue solution to the sealing joint to assist sealing, and finally
install Oil test and pumping test.
Roots Blower Main Specifications Oil Rotary Vane Vacuum Pump In Plastic Industry vacuum pump
