Detailed Analysis of Hot Oil Pump Common Faults and How to Operate them
Hot oil pump (stainless steel hot oil pump) with the use of time, the hot oil pump will
appear insufficient oil, and even pumping oil and other phenomena, mainly due to the relevant
parts of the hot pump wear too much. Hot oil pump wear parts are the main shaft and bushings,
passive gear center hole and shaft pin, pump shell cavity and gear, gear face and pump cover and
so on. Lubricating oil pump wear its main technical indicators can not meet the requirements, it
should be demolished and dismantled, to identify the wear and tear the location and extent, to
take the appropriate approach to be repaired.
1.WRY hot oil pump (stainless steel hot oil pump) shell repair shell crack repair method:
Heat conduction oil pump (stainless steel heat pump) shell crack can be cast 508 nickel
copper electrode welding. Welds must be tight and the pores, and the pump cover with the
flatness of the plane error of not more than 0.05 mm.
2.The active shaft sleeve hole and driven shaft hole after the repair method:
Heat pump (Stainless steel hot oil pump) active shaft sleeve hole wear, the rewinding method
can be used to eliminate wear traces, and then equipped with the corresponding size to the
bushing. Slave hole wear is also used to eliminate the wear and tear marks, and then press the
hinge hole after the actual size of the preparation of the driven shaft.
3.The pump shell cavity repair method:
Wu Ying conductive oil pump (stainless steel heat pump) shell cavity wear, the general take
the cavity to install the method of repair, the cavity will be large after the cast with cast
iron or steel bushing. After the set, the inner cavity is applied to the required size and the
bushing of the extended end face is worn to be flush with the pump housing.
4.Select the appropriate gasket thickness for assembly:
Wujin the first hot oil pump (stainless steel heat pump) all not seen after the repair is
completed, the overall assembly, Wu ying hot pump and before and after the gland to choose the
appropriate thickness of the gasket for assembly, installed after the hand heat pump spindle to
not too tight, you can feel more soft to turn.
5.The heat transfer valve seat repair:
The pressure limiting valve has kinds of ball valve and plunger type valve. After the
spherical seat is worn place a ball on the valve seat and then gently tap the ball with a metal
bar until the ball valve is in close contact with the valve seat. If the seat wear serious, you
can first remove the wear and tear marks, and then use the law to make it close. Plunger valve
seat wear, can be put into a little valve sand grinding, until close so far.
6.Heat pump (stainless stell heat pump) active shaft and bushing repair method:
Will affect the heat pump pumping. In this case, you can use the repair axis or bushing method
to restore its normal with the gap. If the drive shaft wears light, just press the old liner and
replace the standard size of the bushing, with the gap can be restored to the allowable range. If
the drive shaft and the liner wear serious and with the gap seriously exceeded, not only to
replace the bushing, and the drive shaft is also used chrome plating or vibration welding method
to increase its diameter, and then grinding to the standard size, recovery and bushing with the
7.Changzhou Wujin heat pump (stainless steel hot pump) gear flip use:
Changzhou heat pump (stainless steel hot pump) gear wear is mainly in the tooth thickness
parts, and gear face and tooth top wear are relatively light. Gear in the tooth thickness parts
are unilateral wear, so the gear can be turned 180 degrees. When the gear face wear, the face can
be polished, while grinding the hot oil pump housing joint surface to ensure that the gear face
and pump cover gap in the standard range.
8.WRY hear pump (stainless steel hpt pump) pump cover repair method:
Work plane repair: If the pump cover work plane wear less, you can use manual grinding method
to eliminate the traces of wear, that is, in the platform or thick glass plate put a little valve
sand, and then the pump cover on the above grinding, until the wear marks to eliminate, The work
surface is flat. When the pump cover work plane wear depth of more than 0.1 mm, should be taken
after the first grinding method of grinding repair. Repair of the active shaft sleeve: Active on
the pump cover: The repair of the shaft sleeve hole wear is the same as the repair of the housing