Unscramble centrifugal pump phenomenon of sealed and common leakage

2023-09-11 08:57:59

The scale of mechanical and sealed leakage occupies the 50 % above that maintains pump entirely, mechanical and sealed moving stand or fall is affected directlyCentrifugal pumpmove normally, sum up an analysis to be as follows now.

One, periodic leakage

1. (Momentum of change of axial of 1) pump rotor is big, auxiliary and sealed the interference with the axis is big, move annulus to cannot move neatly on the axis. Retroflexion in pump, move, after static annulus wears away, must not compensate displacement. Countermeasure: ?  of Mi Ba Xi gets the axial change momentum of axis of Qian dainty? to should be less than 0.1mm, auxiliary and sealed answer with axial interference moderate, in make sure radial is sealed while, can agile on the axis shift assures after moving annulus to assemble (move annulus to be pressed to bedspring to be able to be played freely come back) .

(The quantity is not worth lube of 2) sealing surface to cause dry clash or pull Mao Mi to seal end panel.

Countermeasure: ? Does be favored with of Wei of hare of  of gourd ladle of a surname of fade appearance barren throw  to embrace ⒕ of  of reef smile to joke not to visit Qian pay Jin?

(3) rotor is periodic oscillatory. The reason is stator and go up, lower end lid is not right medium or impeller and main shaft are lopsided, cavitation or bearing attaint (wear away) , this kind of circumstance can shorten sealed life and generation leakage.

Countermeasure: ? Sift  Yan does  osmund sunlight Suan of serve of Xian Xin of  of Chun Le of hold a memorial ceremony for?

2. Small-sized go corrupt the phenomenon grinding an axis that pump machine seals leakage to cause

(Small pump machine seals invalidation to often arise under 1) 715kW grind an axis, does the position that grind an axis basically have the following: ? Does  make ⒕ of Α of Υ of sour of ㄖ  Qian not toad of obstruct of Cuo of ブ of heart of take along sth to sb of  of  of Ji of ⑸ of lobar extensive deceive?

(2) grinds main reason of the axis:

Machinery of ① BIA double end panel is sealed, controlling state instead is bad working position, the grain in medium, impurity enters sealing surface very easily, make sealed invalidation.

What ② grinds an axis is main be in charge of for balata ripple, and because go up,be carry sealing surface to be in undesirable and lubricant condition, the attrition moment of force between activity annulus is more than balata ripple between canal and axis deliver torsion, produce opposite roll.

③ is moved, static annulus is auxiliary and sealed because get of the weak acid in sewage, weak base corrode, balata already did not have flexibility. Some is cankered already, lost due function, arose to grind axial phenomenon.

(3) is solve above problem, take following step now:

① makes sure the cleanness of lower end lid, oily room is spent, prohibit assembling to not clean lube.

② machine seals line of cover of the oil inside oily room antrum to answer sealing surface of annulus of prep above activity.

③ chooses the machine of different structure to seal according to different use medium. Should redesign to soar Cheng pump machine seal a structure, should choose to caustic medium balata be able to bear or endure the fluorine balata of weak acid, weak base. Annulus of machine Feng Jing should be added prevent turn annul.

2, the leakage that arises as a result of pressure

(The mechanical and sealed leakage that 1) high pressure and pressure wave cause because spring pressure force and when always passing to exceed 3MPa with force of internal pressure of annular seal space greatly than pressing a design, can make seal face bigger than been press, lilquid film is formed hard, seal face wears away serious, send grow in quantity of quantity of heat, cause sealing surface heat to be out of shape. Countermeasure: ? Bedspring of? of dainty of  of Mi Ba Xi compresses a quantity to must undertake by the regulation, not the phenomenon with too big or too small be patient of, the machinery below high-pressured condition is sealed should take step. To make end panel gets power reasonable, reduce as far as possible be out of shape, can use the data with the compression high intensity such as hard alloy, pottery and porcelain, strengthen cooling lubricant measure, choose transmission way, if bolt, sell etc.

(2) vacuum condition runs the pump of mechanical and sealed leakage that cause to be in start, in staying machine course, because pump entrance jams, smoke the account such as gas is contained in sending medium, make annular seal space appears likely negative pressure, inside annular seal space if negative pressure, can cause seal face to do attrition, sealed meeting produces outfit type machine inside flat (water) phenomenon, vacuum is sealed as directional as what pressing sealed differentia to depend on sealed object difference, and mechanical and sealed the adaptability that also has its some way.

Countermeasure: ?  of Biao of heir of  of alliance of take along sth to sb gets Qian? to conduce to improvement so lubricant condition, improve sealed performance.

3, the seepage that poses as a result of medium

(1) great majority goes corrupt pump machinery is sealed after tearing open solution, static annulus and the auxiliary weather strip that use annulus do not have flexibility, some is already cankered, caused machine a large number of sealed leakage have the appearance that grinds an axis even. Because the weak acid in high temperature, sewage, weak base is right static annulus and move what annulus assists balata weather strip to corrode action, caused mechanical leakage too big, move, material of sealing ring of static annulus balata is fourth nitrile, not high temperature resistant, not acid-proof alkaline, it is when sewage when acidity is alkalescent perishable corrode.

Countermeasure: ? Wish balata of? of  green Yue Lu should choose high temperature resistant, be able to bear or endure the fluorine balata of weak acid, weak base.

(The mechanical and sealed seepage that impurity of 2) solid grain poses if solid grain enters seal face, will cut or accelerate seal face wear away, furring and smeary in the axis (set) accumulation speed of the surface exceeds attrition to wear away deputily speed, cause move annulus to cannot compensate displacement of wear and tear, hard deputy to hard attrition movement life should be compared hard deputy to black lead attrition length, because solid grain is met inside the sealing surface of seal ring of built-in black lead.

Countermeasure: ? Does Wan of H of handkerchief of Quan very hot Jian catch Yu of  of thistle of manganese of ∮ of rotten ρ of extensive of  Yun Nai accumulate does  of act of barium of grain of Σ of a keeper of domestic animals of setose thiste  get Qian Suan?

4, the mechanical and sealed seepage that poses because of other issue

Mechanical and sealed in return the not quite logical place such as existence design, choice, installation.

(1) bedspring compresses a quantity to must undertake by the regulation, not the phenomenon with too big or too small be patient of, error 2mm, compress a quantity to increase end panel comparing to press greatly too, attrition quantity of heat is overmuch, cause sealing surface to heat is out of shape and quicken end panel to wear away, compress a quantity to cross end panel of little movement annulus to be not worth than pressing, criterion cannot sealed.

(The axis that 2) installs the sealing ring that move link (or axle sleeve) end panel and the sealed gland that install static annulus sealing ring (or housing) end panel should pour wine cup and repair light, lest assemble when sealing ring of annulus of the activity that touch an injury.

5, last word

Above summed up machinery sealed commonner leakage cause. Mechanical and sealed itself is the accurate component with a kind of higher demand, to design, machining, assemble quality to have very high demand. When use machinery is sealed, analyse of part of one’s job uses all sorts of mechanical and sealed ingredients, make machinery sealed the technical requirement that applies to all sorts of pump and use medium requirement and have sufficient lubricant requirement, such ability assure sealed and long-term reliably movement.

My company still produces fire pump.

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