Current, centrifugal type compressor uses 1 or the whirl of 2 above impeller is assembled jointly, accelerated the rate that gas flows, it is big that this can be controlled to aeriform pressure helpful. The basis uses a case, when pressure runs, gas of machine of centrifugal type pneumatics has stability characteristic, form between the component wear away degree is smaller, won't have created big waste to mechanical spare parts, these conduce to the promotion of speed of compressor gas movement, and improved exhaust efficiency. But, fault rate is low do not be equal to won't malfunction!
1. oil pressure drops suddenly
Compressor oil pressure drops suddenly the matter is more complex, make the connection with close existence with the component inside aircrew, handle this one breakdown to want to be decided according to actual condition. Usually, oil pressure drops to wait for lubricant system vitta with oil pump, vitta relevant, handle this one breakdown to need to do good pressure test and processing work.
For example, when oil pump breakdown is reduced, also reduced pressure, answer oil pump to be checked in time, the platoon investigates breakdown matter; When breakdown and vitta are concerned, breakdown results from cause leak about burst, concrete step is change new oil tube.
2. gas exports discharge to reduce
Gas exports discharge to reduce main reason to consist filter and seal unit, control of these two kinds of components is undeserved the flow that can reduce gas, affect the normal function that equips to compressor. Breakdown processing technique: It is aeriform filter jams cause amount of air sucked in aeration the main reason that decreasing is filter generation breakdown, can pass pair of gas filter clean, thereby trouble removal; The 2 reasons that are breakdown of seal unit generation seal clearance in Yu Mi too big, cause leak, best means of settlement is to change sealed, perhaps undertake adjustment to its according to the regulation.
3. condenser outlet temperature is exorbitant
Aeriform condenser exports positional temperature to be more than 60 ℃ , between the cooling water quantity of the generation of this breakdown and condenser and its cooling pipe, velocity of flow, tube plate and canal cooperate to concern. For example, cooperate to become loose between tube plate and canal or cooling pipe burst, cannot maintain aeriform condenser to export positional temperature, make its exceed limit; Compressor movement pressure is exorbitant and added a part wear away, produced apparent temperature elevatory phenomenon. Specific processing measure: Use pipe expander to bilge the pipe that become loose close, or the pipe that already damaged two end jam, undertake cleaning to the fuse of condenser.
4. bearing temperature is exorbitant
Bearing is the core component of operational failure of centrifugal type compressor, the locomotive efficiency that deciding whole platform equipment, bearing temperature is exorbitant it is to compress accident to compare common stoppage all right. Temperature breakdown basically behaves: The aperture of circle of reduce expenditure of the mouth that receive oil of bearing is too small, the capacity that receive oil is insufficient; Lubricant system oil pressure drops or oil purifier jams, the quantity that receive oil decreases; The cooling water of oil cooler measures inadequacy, the temperature that receive oil is exorbitant.
According to these breakdown phenomena, actual processing process needs to overhaul lubricant system oil pump, vitta or clean oil purifier; Adjust the quantity drinking water of oil cooler cooling water; The aperture of circle of reduce expenditure of the mouth that receive oil of bearing is too small, into oily quantity insufficient; increases reduce expenditure to encircle bore diameter appropriately; Overhaul oil cooler, remove slack trouble or change new oil.
5. bearing vibration is too big
Oscillatory load increased bearing bear the weight of extent, and cause the breakdown consume of structure of compressor of centrifugal type air, to component injury has very big harm sex. Bearing vibration load exceeds the breakdown performance of mark: Rotor or add fast implement the dynamic balancing precision of size gear is destroyed; The interference between bearing lid and made of baked clay back of plain bearing liner is too small; Gear clench the teeth undesirable, gear wears away serious or attaint.
To processing of this kind of breakdown, main way is new and corrective dynamic balancing; Blow grind bearing separates a side in lid level or abrade adjust spacer, make sure interference is 0.02 ～ 0.06mm; Inspect gear wear out condition, the rough travel between gear of new and corrective size is spent, the center is apart from reach area of clench the teeth, make accord with a requirement.
Effect of 6. condenser refrigeration is poor
Condenser basically is used at adjusting the stability of compressor interior temperature, maintain balanced temperature to run segment in order to create advantageous compressor, and the play that cooling invalidation breakdown affected function of whole platform equipment. Primary failure expression: Aeriform condenser cooling power drops; Cooling pipe surface accumulates bilge; Cooperate to become loose between cooling pipe burst or canal and tube plate.
Processing condenser breakdown needs to check component from many sided, at the same time the key examines cooling water quantity, the water velocity of flow in asking condenser is in charge of should be less than 2m/s; Clean condenser fuse; Jam already damaged two end of the canal or the canal that will become loose with pipe expander bilge close. When necessary, can choose condenser to install processing afresh, improve the cooling result that compressor runs actually, lower the occurence rate of cooling breakdown.
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