Internal gear pumps - overview
Internal gear pumps are positive displacement pumps.
However, due to their design, they belong to the gear pumps and represent a class of their own.
Pump head with internal gear rim, which is connected to the drive shaft. The externally toothed gear wheel is driven by the internal gear wheel rim. The externally toothed gear wheel is cantilevered in the pump cover. The drive unit usually consists of a coupling and a geared motor. However, there are also other designs such as direct-coupled motors, often in combination with a magnetic coupling.
Due to the asymmetrical position of the external gear wheel, the size of the delivery space changes during one revolution of the internal gear wheel rim, which pushes the medium from the suction side to the pressure side of the pump. The internal gear rim connected to the drive shaft drives the smaller gear. The liquid medium is conveyed horizontally or vertically, sometimes also with a 90° angle, depending on the design or orientation of the pump head. The gear wheels are lubricated by the medium.
The size, module and design, in combination with power and speed, determine the flow rate. The flow rate is variable by speed control or bypass solutions. The delivery pressure is determined by the back pressure on the pressure side of the system and is limited by the power limit of the machine and the gap losses.
Pressure: up to 16 bar
Flow rate: 0.6 to 290 m^3/h
Viscosity: up to 1 - 200,000 mPas
Temperature: - 40 to 300 °C
Power: 75 kW
Solids content: up to X% (always requires testing)
Solids size: variable (always requires testing)
Suction height: up to 4 m
Heating: electrical, thermal oil, steam, water
Internal gear pumps are suitable for pumping primarily clean, non-abrasive media; robust designs allow a certain amount of solids.
As positive displacement pumps, these machines are suitable for pumping low- to high-viscosity liquids. Different gear shapes ensure optimum pumping of the liquid
Internal gear pumps are self-priming and relatively economical to purchase due to the small number of components.
In the field of positive displacement pumps, internal gear pumps are considered to be low-pulsation/free.
Stuffing box packing, lip seals, single mechanical seals, double mechanical seals, magnetic coupling
Grey cast iron, cast steel, steel, stainless steel, other special alloys on request
Pampu za gear ya ndani - muhtasari Pampu za gear ya ndani ni pampu za kuhamisha chanya. Hata hivyo, kwa sababu ya kubuni yao, wao ni mali ya pampu gear na kuwakilisha darasa la yao wenyewe. Pampu kichwa na ndani gear rim, ambayo ni kushikamana na shaft drive. nje toothed gear wheel ni kuendeshwa na ndani gear wheel rim. nje toothed gear wheel ni cantilevered katika kifuniko pampu. Kitengo cha kuendesha kawaida inajumuisha kuunganisha na geared motor. Hata hivyo, kuna pia miundo mingine kama vile moja kwa moja-kuunganishwa motors, mara nyingi katika mchanganyiko na magnetic kuunganisha. Kwa sababu ya nafasi asymmetrical ya gia ya nje, ukubwa wa nafasi ya utoaji hubadilika wakati wa mzunguko mmoja wa pande ya gia ya ndani, ambayo husukuma kati kutoka upande wa kunyonya hadi upande wa shinikizo la pampu. Rimu ya ndani ya gia iliyounganishwa na shaft ya kuendesha huendesha gia ndogo. Mtiririko wa maji huendeshwa kwa usawa au wima, wakati mwingine pia kwa pembe ya 90 °, kulingana na muundo au mwelekeo wa kichwa cha pampu. Magurudumu ya gia ni lubricated na kati. Ukubwa, moduli na kubuni, kwa pamoja na nguvu na kasi, kuamua kiwango cha mtiririko. Kiwango cha mtiririko ni kutofautiana na kasi ya kudhibiti au bypass ufumbuzi. Uwezo wa usafirishaji huamuliwa na shinikizo la nyuma kwenye upande wa shinikizo la mfumo na hupunguzwa na kikomo cha nguvu ya mashine na hasara za pengo. Viscosity: hadi 0.6 - 200,000 mPa, joto: -40 - 300 °C, nguvu: 75 kW, kiasi cha vinyama: hadi X% (kila wakati inahitaji kupimwa), ukubwa: kubadilika (kila wakati inahitaji kupimwa), urefu: hadi 4 m, joto: umeme, mafuta ya joto, mvuke, maji, pampu za gear za ndani zinafaa kwa pampu ya vyombo vya habari safi, visivyo na abrasive. Kama pampu chanya displacement, mashine hizi ni yanafaa kwa ajili ya pumping chini ya juu viscosity kioevu. Aina tofauti za gear zinahakikisha pampu bora ya kioevu: Pampu za gear za ndani zinajipima na ni za kiuchumi kununua kwa sababu ya idadi ndogo ya vipengele. Katika uwanja wa pampu positive displacement, pampu gear ndani ni kuchukuliwa kuwa chini ya pulsation / bure. Vifaa vya kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia, kufungia