400DT-A65 FGD Engineering Pump Impeller,Good Adhesion And
Resistance To Bending
Impeller For 400DT-A65
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The impeller is made of A49/A05 or duplex stainless steel with good
wear resistance and acid resistance.
The flue gas contains a lot of dust, and under the action of
corrosive medium, the actual situation of wear may be more obvious.
The 400DT -A65 impeller has corrosion resistance and wear
resistance, and the service life is longer.
Advantage
1, Has a certain bending resistance
2, Has a good adhesion
3. Meet the anti-corrosion requirements under complex chemical
conditions
Impeller repair method
1,copper wire repair method
For pinhole-shaped cavitation, as long as the holes are not
connected into a piece, the pinhole can be punched with a copper
wire, and the trowel can be used to smear. Before processing, the
surface of the blade should be cleaned with rust and dirt, then the
oxygen in the pores should be blown off with the oxygen-acetylene
flame, and then the appropriate thickness of the copper wire is
filled into the hole, and the copper is tapped with a pointed
hammer. The wire is squeezed and squeezed into the hole and
flattened with a file.
2,gas welding repair method
The impeller is placed on a charcoal fire and heated to 400-500 °
C. The tin is hung at the repaired joint, and then the brass
filament is melted into the groove or hole to be repaired with an
oxygen-acetylene flame. After the welding, the charcoal fire is
removed, and asbestos is removed. The board is covered with
insulation to allow the blades to cool slowly to avoid cracking.
After welding, the boring tool is used to finish the machining
according to the original contour.
3,epoxy resin repair method
According to the mixing ratio and order, take appropriate amount of
epoxy resin, ethylenediamine, dibutyl phthalate and acetone in a
glassware and mix well. Pay attention to the viscosity of the
adhesive when mixing, and add the amount of acetone in an
appropriate amount. The prepared epoxy resin is used up within
20-30 minutes. Use a wool brush to pick up the epoxy resin, brush
the surface of the blade with the blisters and pores. When
brushing, use a sharp cone to gently squeeze out the blisters and
the bubbles in the middle of the pores. Apply as much as possible
and gently scrape with a scraper. real. After the epoxy resin is
cured for 1-2 hours, brush it again for 2 to 3 times. When applying
the brush once, be sure to make the surface of the blade smooth and
smooth. After the painting is finished, the impeller is placed in
an environment of 20-30 ° C and a relatively low relative humidity,
and is slowly maintained for 48 hours. After the epoxy resin is
completely cured, the contour of the impeller and the protrusion on
the surface layer are trimmed with a file or a sander.
4,accelerated steel repair method
Quick-formed steel is a cement-like adhesive repair agent before
curing. It has high strength, high hardness, no shrinkage and no
rust after curing. It is suitable for filling pores, cracks,
blisters, etc. in steel, iron and other metal materials. Repaired
with a strong bonding effect. Before repairing, clean the rough
rust and dirt around the repaired area and roughen it. The colloid
in the plastic tube of the quick-form steel is taken out, and the
materials of the two different colors of the core and the outer
skin of the gel are quickly and fully smashed into one color (about
1 to 2 min) to achieve heat generation and softness. Before the
colloidal steel colloid is to be solidified, it is firmly adhered
to the repairing place, and is compacted with force (hand or tool)
multiple times during the solidification process of the colloid to
enhance the adhesion of the adhesive to the blade. After the
fusible steel is hardened, it is flattened with a file.
5,surfacing repair method
Before surfacing, grind the cavitation part with a grinder, and
clean the surface of the rust and debris until the bright metal
body is exposed, so that the surfacing layer and the blade are more
firmly combined. After cleaning, the impeller is placed in a
charcoal fire for preheating. Use the same electrode or stainless
steel electrode as the blade material, without peeling, damage,
keep dry, remove moisture, so as to avoid air holes in the weld.
When surfacing, it is necessary to adopt round-trip welding, or
stratified cross-welding can be adopted, and the amount of welding
should be less at each time to prevent the blade from being
concentrated by heat and causing stress deformation. After repair
welding, the blade is trimmed with a sander. The repaired impeller
must be subjected to a static balance test. In order to prevent the
impeller from rotating at a high speed, the centrifugal force is
generated due to the imbalance of the additional weight to cause
the water pump to vibrate.
Structure of slurry pump
| No. | Name | Material |
| 1 | Impeller | High-chrome alloy |
| Natural Rubber |
| 2 | Volute casing | High-chrome alloy |
| 3 | Front liner plate | High-chrome alloy |
| Natural Rubber |
| 4 | Rear liner plate | High-chrome alloy |
| Natural Rubber |
| 5 | Liner | High-chrome alloy |
| 6 | Expeller | High-chrome alloy |
| 7 | Shaft sleeve | 3Cr13 |
| 8 | Water-seal ring | High-chrome alloy |
| 9 | Shaft | 45#steel quenching and high temprature tempering |
| 10 | Bearing housing | Gray Iron |
| 11 | Expeller ring | High-chrome alloy |
| Natural Rubber |
| 12 | Front casing | Gray iron or Nodular cast iron |
|
| 13 | Rear casing | Gray iron or Nodular cast iron |
|
| 14 | Base | Gray Iron |
|
| 15 | Support | QT500-7 |
