Home>Bearing knowledge> Pump bearing seal is not resistant to wear and high temperature treatment

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Pump bearing seal is not resistant to wear and high temperature treatment

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Treatment method: using the impeller mouth ring of polyimide carbon fiber composite material to cooperate with the stainless steel pump casing ring, replace the original graphite bushing with the throat bushing of our data.
Result: The oscillation fluctuation is reduced; then the sealing service life and bearing service life are prolonged; the pump's free operation is enhanced; many pumps are used as packing in the application; the primary effect of the packing is to prevent leakage; The effect of the bearing; the stability of the shaft. Many pumps have now changed the packing to a mechanical seal; followed by the transformation of the mechanical seal; the bearing has no effect; and the axis violation (high oscillation and associated effects) has become a problem.
Improve the pump with polyimide carbon fiber composite data; successfully deal with the customer's problems; the first two points are:
1) Polyimide carbon fiber composite material is a metal-free wear and non-bite material. This makes the working space shrink. Half of the gap between the metal material gaps of the API rule; the bush with smaller gap can stabilize the shaft; Small gaps in the mouth can further limit the leakage and leakage speed.
2) Polyimide carbon fiber composite material is a kind of high-strength, high-performance thermoplastic material. It is easy to inject; it can absorb oscillation and impact; and in the replaced metal, it will cause oscillation and shaft wear.
Parts: equipped with a movable sealing sleeve and Teflon bearings. The 猓 猓 猓 猓 С С С ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニ ニAttempts to find a suitable problem to deal with wear and shaft violations; all materials are scrapped within 2 to 3 months. During this period, the products of PTFE raw materials are worn due to wear and tear; large leakage occurs; mechanical seal failure .
Treatment method: replace the originally used filler PTFE bearing with polyimide carbon fiber composite material.
RESULTS: The polyimide carbon fiber composite material supported the bearing device; it has been successfully operated for more than 13 months; the eighth month after the application; the middle part of the agitator was removed and temporarily used for other equipment; at that time; the operator detected The agitator bearing; found that the leakage per inch per inch is less than 0. 005; at this moment, the intermittent error has improved by 300% to 400%.
. ㄈ┏鱿 猓捍吮 猓捍吮 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且The first few dry-run situations often lead to premature pump damage; metal parts are also greatly damaged. The uniformity of these pumps is only six months apart.
Treatment method: replace the stainless steel impeller ring and bushing with polyimide carbon fiber composite data; the operating clearance is reduced by about 50%.
RESULTS: The pump improved with polyimide carbon fiber composite data has been used for more than a year. Some bad conditions have been presented during the operation; the voids are dry; the pump is not working; but after the polyimide The carbon fiber composite data update has now delayed this appearance. In addition, the customer also issued a statement: it was modified by the use of polyimide carbon fiber composite materials; the operating gap was reduced; the pump output flow has increased by 400gpm; The other two multistage pumps were updated.
ㄋ ┏鱿 ┏鱿 猓壕缌 猓壕缌 猓壕缌 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : .
Result: Oscillation starts at 0.600 inches/second; after improvement, the oscillation is 0. 094 inches/second; power is promoted to 5%.
Oscillation: The reason for the decrease in oscillation is as follows:
1) Recycling activity and its effect on rotor instability are reduced,
2) The void is reduced.
3) Natural thermoplastic materials have easy injection molding function; absorb sensation or impact.
Power: The power improvement is due to the reduction of the gap between the pump casing and the impeller ring. The gap here will in turn reduce internal recirculation.
Reliability: The pump has been in operation for more than four years; the refinery has now used polyimide carbon fiber composite materials on more than ten pumps.
Advantages and use of anti-abrasive materials for polyimide carbon fiber composite materials:
a. Excellent wear resistance. It is superior to rubber, bronze, carbon graphite and other materials in the case of abrasive particles.
b. Widely used in the sewage pump, sea water pump (working environment is sand and other abrasive particles) bushing; pipeline pump bearing and bowl wear ring.
c. Only referrals are used as fixed parts (because of the temperature constraints of the data).
d. Compared with other non-metallic materials; anti-abrasive composite materials have better chemical resistance.
e. Compared with rubber bushings and other metal materials; polyimide carbon fiber composite data has a very low coefficient of friction.

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