As socioeconomy fractionize level often deepen, constrictive machine regards double screw as a kind of main power plant source, be used by increasing ground at all sorts of spending categories, the consumption that because this its movement configuration will be affected directly,uses gas company runs. Once its are operated undeserved, safeguard not do one's best, can break out in movement all sorts of defect, affect the manages life and company consumption efficiency of equipment thereby, serious person still can form person to reach money equipment loss in safety. We will be in with respect to constrictive to screw machine tomorrow the inertial achievement of exhaust respect stops a few discuss.

1, screw is constrictive machine task principle

Inspiratory process: When rotor is rotational, advocate the cubage between a tooth-like part of anything that deputy rotor place makes is progressively and patulous, this cubage connects with inspiratory mouth merely, outside air by the cubage between inspiratory tine inside. Add when the cubage between tine big when, the cubage between tine and inspiratory mouth disconnect, inspiratory end. This enters air process ” for “ .

Block and recommend process: When inspiratory cease, advocate peak of deputy rotor tine can be shut with housing, the air inside the cubage between tine is in by block namely by advocate, inside deputy rotor and the block speech that housing constitutes, this namely ” of “ block process. Two rotor turn continuously, advocate deputy rotor tine is mutual clench the teeth, face of clench the teeth carries move to exhaust stage by stage, the air inside the cubage between tine also recommends to exhaust end accordingly, namely “ recommends process ” .

Constrictive reach fuel injection process: In recommend in the process, as the whirl of rotor, the clench the teeth that the cubage between tine ages as a result of rotor and often reduce, the aeriform bulk inside the cubage between tine also is reduced subsequently, gas by constrictive, pressure is reduced, this namely ” of “ constrictive process. Constrictive while, smooth oil is differred because of pressure and gush is entered mix with air inside roller seating space.

Exhaust process: When rotor turns to the cubage between tine and housing vent to be interlinked, by constrictive gas germinant eduction, this process continues to age ceaselessly endmost molded lines is complete clench the teeth, right now the cubage between tine is 0, gas by complete eduction, finish ” of “ exhaust process namely.

2, infrequent defect is analysed reach deal with

2.1 exhaust Wen Du is exorbitant

Once discharge air temperature to surmount beforehand of buy safeguard temperature to be worth, the overheating on constrictive machine calls the police to stop switch oneself meeting act, and occasion stays engine trouble in season. Common exhaust temperature is in 70 ~ inside 95 ℃ limits, local brand will be taller.

(1) convention component meditates. Traditional introspection is common by first easy hind difficult order stops. Because ① is constrictive machine is fragmentary lack engine oil, nose cannot the refrigeration with very good lose, make nose exhaust Wen Du exorbitant thereby, should seasonable complement is right now smooth oily. ② oily filter. Screw is constrictive the oil of machine filters appliance has taller precision, filter core is extremely easy infarction, bring about lead plane is lacked for oil, exhaust Wen Du is exorbitant. Can use public tool oily filter discharge goes up, core of careful introspection filter whether contain contamination, if filter core is dirty,should stop in time to change. ③ cooling fan. Cooling fan is the crucial part of wind cold aircrew, can apply to oily condenser and air aftercooler force to come loose hot. Fan regards motivation as the source, can make be in the cooling wind between housing and interior space to suspend circular activity, of ascensive machine medicinal powder hot effect. Once fan break down is rotational, the exhaust temperature of constrictive machine can arrive inside certain work call the police to stop rate oneself. In view of cooling fan area slightness of big, lamina, stiffness is poorer, changeful the characteristic such as form, demand often stops introspection to its, try to adjust when necessary. ④ condenser. Oily condenser and air aftercooler serve as less important radiator, indispensible current stops to clean. The bilge secondary of condenser face face is the greasy filth that cooling oil and dirt form, and condenser is much by the wing piece control, place in the wing piece the greasy filth between hard clean up, use high-pressured vapour gush to wash except corrupt the effect is better; The bilge secondary inside condenser canal is the carbon deposit that produces in oily loop process, general and public clear lotion stops general to be rinsed circularly, till carbon deposit is complete purify.

(2) pressure switch meditates. The lead plane of constrictive machine discharges double screw baric force by pressure switch set, once pressure switch attaint or locker lock are lax, suffer machine vibration to affect, make set is worth fit drift easily, form exhaust pressure to surmount demarcate to be worth, then overheating of occasion aircrew exhaust.

(3) is lukewarm introspection charging a powerful person. Lukewarm accuse a powerful person to be 3 a powerful person, when constrictive machine refrigeration is started, can make oil bypasses condenser, direct gush joins leader, the oil that finish is lukewarm rise tantivy, in case the vapor in constrictive air is in oily take leave of implement in condense. When oil lukewarm after rising to 65 ℃ , lukewarm meeting charging a powerful person is reduced lukewarmly as oil and will advocate loop breaks up gradually, the oily quantity scale that sheds classics oily condenser and bypass through recuperation will control oil lukewarm, ensure the fuel injection temperature of constrictive machine insists to be in optimal dot; Be like lukewarm malfunction charging a powerful person, smooth oil can not via oily condenser direct gush joins leader, oil is lukewarm cannot reduce, form exhaust temperature tall and stop machine. Stop machine hind, should meditate above all the temperature that oily condenser enters a vitta, if difference in temperature is not big, answer lukewarm accuse a powerful person to stop introspection. Lukewarm the defect that accuses a powerful person to be able to appear: The heat on core of ① a powerful person quick bedspring cannot change lukewarmly as oil and normal act; Body of ② a powerful person wears away, act does not reach the designated position, cannot hold the post of normally Wu. Want a basis to carry out a state seasonable rehabilitate or newer.

(4) breaks introspection of oily electromagnetism a powerful person. If aircrew is used temporarily,open automatically stay means mission, stop because of be being opened often, a powerful person of the electromagnetism that break oil breaks out extremely easily attaint, oil is lacked or because offer,causing main engine is overheating of for oily stop halfway occasion aircrew exhaust.

(If 5) is constrictive machine did not use special smooth oil, be replaced however with inferior smooth oil, below microtherm condition, smooth oil is lacked in order to uphold each parts of constrictive machine, this can bring about exhaust temperature is reduced in a moment. Pneumatics machine Wen Du is exorbitant it is a kind of infrequent defect, what often cannot operate personnel with occasion is enough pay attention to, microtherm continues, can bring about consumptive loss of efficiency, the consume of double equipment, prolong equipment life.

2.2 exhaust control force on the low side

Lead plane exhaust presses secondary of force on the low side to wait for cause occasion by divulge of the lack that take energy of life, exhaust, demand meditates from the following respects:

Defect of ① air bleeder (cannot close when to load) ; Setting of ② pressure switch is too low (relay controls aircrew) ; ③ pressure expresses illness (relay controls aircrew) , change pressure watch; Defect of ④ pressure switch (relay controls aircrew) , maintenance, change when necessary pressure switch; ⑤ control pipeline is flat: Constrictive machine controls air pipeline is flat will make a powerful person that take energy of life cannot turn over as a result to cannot be taken at unit negative charge entirely full; ⑥ air demand is more than supply: The valve on conduit of introspection air feed whether open or fragmentary on whether have flat picture, increase with tolerance; ⑦ inhaler block: The action of air filter is will inspiratory air tries to filter, assure to enter air the air cleanness of constrictive machine is clean. If block of inhaler filter core is serious,enter those who affect unit tolerance. Need so change in time its filter core; ⑧ pressure recuperates implement malfunction or attaint: The function with pressure fragmentary recuperation is the measurement that uses tolerance according to the client, recuperate constrictive machine automatically, so that arrive at supply and demand balanced. Should recuperate to the pressure of attaint so implement change in time, recuperate to the pressure of malfunction implement adjust in time; Take leave of of ⑨ oil gas implement infarction: Because oil path is fragmentary medium put in certain impurity more or less, filter core task after a paragraph of time, picture of meeting fit block makes constrictive air is added through the obstruction of filter core, affect the regular job of aircrew. Consequently, operate the signal that personnel should show on basis monitor face plate, change in time filter core.

On the high side of 2.3 exhaust oil content

What on the high side of oil content of constrictive machine exhaust can lower gas not merely is clean degree, purifying device, and can increase oily cost, add consumptive capital. Exhaust oil content appears when exceeding bid, can begin to meditate from the following respects.

(1) fuse of oily take leave of presents attaint

In screw type in the locomotive process of constrictive machine, fuse of oily take leave of presents attaint to be like damaged, perforative picture, so the action that its got oil gas leave. That is to say the exhaust conduit of gas mixture and constrictive machine is direct and perforative, a few cooling oil was not come out by take leave of, as gas together by eduction airframe, formed the breakdown that carry oil presents in exhaust process.

(2) the pipeline that answer oil presents breakdown

In screw type in the job progress of constrictive machine, bear of the pipeline that answer oil emphasizes wanted responsibility, fuse of oily take leave of is exterior can make difference of a kind of pressure with constrictive machine exit, in this kind of pressure wrong action falls, the oil that the bottom that answers vitta road to hold the position of fuse of will oily take leave of collects recommends a constrictive machine, apply continuously in leaving a circular course. If answer oil path to present block, rupture and device is incorrect wait for illness, the oil that cannot collect bottom of fuse of oily take leave of recommends a constrictive machine, the oil that forms bottom keep long in stock is overmuch, so this is local the oil that was not recommended to answer constrictive machine will as aeriform eduction, the picture that takes oil presents in can presenting exhaust process.

(3) fragmentary pressure control is too low

In screw type in the locomotive process of constrictive machine, fragmentary pressure control is too low, will form take leave of implement the centripetal force inside is less than job requirement centripetal force, so take leave of implement action comes out with respect to won't complete expression, can form enter take leave of of below one link implement the oil content of the gas inside fuse is exorbitant, exceeded range of its take leave of, also brought about oil gas take leave of is not complete, the breakdown that carry oil presents in process of constrictive machine exhaust.

(4) become effective of valve of the least pressure

In screw type in the locomotive process of constrictive machine, the action of valve of the least pressure is to make sure fragmentary pressure control is in locomotive process over the least pressure. If valve of the least pressure presents become effective picture, so fragmentary the least pressure will not assure, because the air consumption of lottery equipment is very big, can form fragmentary pressure too low, the pipeline that answer oil cannot answer oil. Gather in oily take leave of implement the oil of fuse bottom will not be answered send constrictive plane inside, meeting as constrictive gas eduction constrictive machine, form the defect carrying oil in smooth exhaust process.

(5) the cooling oil that attends inside constrictive machine is overmuch

In screw type constrictive machine runs before, the cooling oil that attend is overmuch, surmount the limits of constrictive machine, so in the locomotive process in constrictive machine, because oil level is exorbitant, although take leave of is fragmentary,came out oil gas take leave of, but in gas in discharging, gas returns oily be involved in of meeting general refrigeration to arrive among gas discharge, the oil content in causing a deflate system is exorbitant, present the breakdown that carry oil.

(6) cooling oily off quality

Before constrictive accident turns, attended unqualified cooling oil, cool probably oil transcended applicable time, once cannot attain cooling result. So in screw type in the locomotive process of constrictive machine, cooling oil got its action, can not enrage oil cooling take leave of. Can present the breakdown that carry oil with respect to affirmation in exhaust process so.

2.4 the mouth that take energy of life returns oil

Constrictive machine stays machine hind, cooling oil presents gas opening from lead plane ejective, this one picture returns oil to present gas opening namely. The cause secondary of this one picture has occasion the following respects.

(1) is gone against stop defect of a powerful person. Lead plane vent-pipe is constrictive air pours those who shed a lead plane alone one passageway, go against core of a powerful person of the movement when stopping to hairpin of core of a powerful person of a powerful person cannot close completely or be faced to wear away sealed become effective can bring about constrictive air flows backwards, drive lead plane rotor to invert, the smooth oil inside intromit lead plane from the mouth that take energy of life ejective. Break down go against stop a powerful person, core of introspection a powerful person and sealed, if attaint changes, this kind of defect is likened to little.

(2) breaks defect of oily electromagnetism a powerful person. A powerful person of the electromagnetism that break oil is to often close valve, action is to be in stop machine hind to cut off oil path, prevent smooth oil from oily take leave of implement enter lead plane. A powerful person of the electromagnetism that break oil closes lax, below the state that has not uninstalled completely in pressure, oil can enter lead plane from gasoline tank, form the mouth that take energy of life to turn over gush. Introspection stops oily electromagnetism a powerful person, if damage,change new a powerful person or family.

(3) drain valve not release. In staying machine course, drain valve should turn over acquit to put oily take leave of implement, the pressure inside oily filter, if a powerful person damages cannot normal exhaust step-down, a powerful person of the electromagnetism that break oil closes not in time, can bring about after smooth oil enters lead plane from the mouth that take energy of life ejective. Introspection drain valve, if damage,should stop to change.


Screw is constrictive although machine is wave motion of a kind of function, fragile a less mechanical equipment, but there are various elements to be able to bring about in movement its fit defect. The trouble that we want to appear in movement to constrictive machine only has more understanding and master, ability makes sure its are restful firm runs, it is consumptive work for better.