決定軟管壽命的首要因素是壓縮軟管的次數(shù);第二位因素是壓縮軟管的方式、力度和磨擦熱。使軟管壽命最大化的最好辦法是減少壓縮軟管的次數(shù)、采用對軟管最小損害的壓縮方式及精確的壓縮力度。
The first factor determining hose life is the number of times of
compression hose; the second factor is the way, strength and friction
heat of compression hose. The best way to maximize hose life is to
reduce the number of times of compression hose, adopt the compression
method of minimal damage to hose and precise compression strength.
1、 HPP軟管泵壓輥每轉(zhuǎn)只壓縮軟管一次--這決定性地延長了軟管壽命。
1. The HPP hose pump roller compresses the hose only once per turn, which decisively prolongs the hose life.
2、
從對軟管的損害程度來看，大直徑壓輥無疑要強(qiáng)于小直徑壓輥和滑靴。傳統(tǒng)U形泵軟管壽命之所以低的一個很重要的因素之一就是壓輥或滑靴對軟管進(jìn)出口部的沖擊造成的。軟管的其它部分還遠(yuǎn)未疲勞老化，但進(jìn)出口處和轉(zhuǎn)子接觸的部位，卻因轉(zhuǎn)子強(qiáng)烈的沖擊而破損、爆裂，從而使整根軟管報廢。
2. Judging from the degree of damage to hose, large diameter rollers are
undoubtedly stronger than small diameter rollers and slippers. One of
the most important factors for the low service life of the hose of
traditional U-shaped pump is the impact of roller or slipper on the
inlet and outlet of hose. The other parts of the hose are far from
fatigue aging, but the parts in contact with the rotor at the inlet and
outlet are damaged and burst due to the strong impact of the rotor, so
that the whole hose is scrapped.
HPP泵的大直徑壓輥開啟和閉合軟管內(nèi)腔時比較緩和;在進(jìn)出口處切換時，減輕了對軟管的沖擊，降低了脈動的強(qiáng)度。并且，每轉(zhuǎn)只進(jìn)行一次切換，只產(chǎn)生一次脈動。3、
消除了滑動磨擦--HPP軟管泵的大直徑壓輥同軟管接觸的面積比多壓輥泵小直徑壓輥大二倍以上，就象大直徑的寬輪胎抓地性能更好一樣，完全消除了滑動磨擦，即使高壓、高速運(yùn)轉(zhuǎn)也僅產(chǎn)生微量的滾動磨擦熱。在同等條件下，HPP軟管泵的泵體溫度比多壓輥泵低5度。
The large diameter pressure rollers of HPP pump open and close the inner
chamber of hose more gently; when switching between inlet and outlet,
it reduces the impact on hose and the intensity of pulsation. Moreover,
only one switching per turn produces one pulsation. 3. Eliminate sliding
friction--The area of contact between large diameter roller and hose of
HPP hose pump is more than two times larger than that of small diameter
roller of multi-roller pump, just as the grip performance of large
diameter wide tire is better, it completely eliminates sliding friction,
even if it runs at high pressure and high speed, it produces only a
little rolling friction heat. Under the same conditions, the pump body
temperature of HPP hose pump is 5 degrees lower than that of
multi-roller pump.
4、
最小的壓縮力度--壓輥或滑靴壓縮軟管必須有一定的過盈量，使軟管內(nèi)腔完全閉合，才能保證抗得住出口的高壓力而不內(nèi)泄。壓縮不足，會產(chǎn)生倒流，容積效率下降、自吸能力下降、流量下降;同時介質(zhì)中的雜質(zhì)會劇烈地沖刷、磨損壓縮處的軟管內(nèi)壁，使軟管壽命急速下降。而過度壓縮，會使軸承負(fù)載加大，能量消耗加大。即使多過盈壓縮1毫米，軟管壽命也會降低25%。所以正確的壓縮力度是延長軟管壽命的一個重要因素。
4. Minimum compression strength-the pressure roller or slipper
compression hose must have a certain amount of interference, so that the
inner cavity of the hose is completely closed, in order to ensure that
it can withstand the high pressure of the outlet without internal
leakage. Insufficient compression will result in backflow, decrease in
volume efficiency, self-priming ability and flow rate. At the same time,
impurities in the media will scour violently, wear and tear the inner
wall of the compressed hose, and make the hose
