centrifugal compressors are also similar to centrifugal pumps of the style shown in the adjacent figures. the key difference between such compressors and pumps is that the compressor working fluid is a gas compressible and the pump working fluid is liquid incompressible . again, the engineering methods used to design a centrifugal pump are .
eductors are used on-board ships to pump out bilges, since using centrifugal pump would not be feasible as the suction head may be lost frequently. some aircraft mostly earlier designs use an ejector attached to the fuselage to provide vacuum for gyroscopic instruments such as an attitude indicator artificial horizon .
suction is the force that a partial vacuum exerts upon a solid, liquid, or a gas. better source needed removing air from a space results in a lowered pressure, which can cause fluids to enter the space or produce adhesion.when the pressure in one part of a system is reduced relative to another, the fluid in the higher pressure region will exert a force relative to the region of lowered pressure.
to ensure that a centrifugal pump remains primed and does not become gas-bound, most centrifugal pumps are located below the level of the source from which the pump is to take its suction. the same effect can be gained by supplying liquid to the pump suction under pressure supplied by another pump placed in the suction line. the process of .
a turbopump is a propellant pump with two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together.the purpose of a turbopump is to produce a high-pressure fluid for feeding a combustion chamber or other use.. there are two types of turbopumps: a centrifugal pump, where the pumping is done by throwing fluid outward at .
head is useful in specifying centrifugal pumps because their pumping characteristics tend to be independent of the fluid's density. there are four types of head used to calculate the total head in and out of a pump: velocity head is due to the bulk motion of a fluid kinetic energy . its pressure head correspondent is the dynamic pressure.
a cryopump or a 'cryogenic pump' is a vacuum pump that traps gases and vapours by condensing them on a cold surface, but are only effective on some gases. the effectiveness depends on the freezing and boiling points of the gas relative to the cryopump's temperature.
the main advantage of an axial flow pump is that it has a relatively high discharge flow rate at a relatively low head vertical distance . for example, it can pump up to 3 times more water and other fluids at lifts of less than 4 meters as compared to the more common radial-flow or centrifugal pump.
a pump that has been operating under these conditions shows premature wear of the impeller vane tips and the pump housing. in addition, due to the high pressure conditions, premature failure of the pump's mechanical seal and bearings can be expected. under extreme conditions, this can break the impeller shaft.
a rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. in some cases these vanes can have variable length and/or be tensioned to maintain contact with the walls as the pump rotates.
a vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. the first vacuum pump was invented in 1650 by otto von guericke, and was preceded by the suction pump, which dates to antiquity. 1.1 early pumps. 1.2 19th century. 1.3 20th century. 2.1 positive displacement pump.
a centrifugal evaporator often comprises a vacuum pump connected to a centrifuge chamber in which the samples are placed. many systems also have a cold trap or solvent condenser placed in line between the vacuum pump and the centrifuge chamber to collect the evaporated solvents. the most efficient systems also have a cold trap on the pump .
electrically powered rotary centrifugal pumps were later adopted, as more efficient and more reliable. there were initial concerns whether these would be capable of pumping brine against the vacuum of the evaporator and so there was also a transitional type where a worm gear-driven plunger pump for brine was driven from the rotary shaft.
a liquid-ring pump is a rotating positive-displacement pump.. they are typically used as a vacuum pump, but can also be used as a gas compressor.the function of a liquid-ring pump is similar to a rotary vane pump, with the difference being that the vanes are an integral part of the rotor and churn a rotating ring of liquid to form the compression-chamber seal.
submersible pump cable are designed for use in wet ground or under water, with types specialized for pump environmental conditions.. a submersible pump cable is a specialized product to be used for a submersible pump in a deep well, or in similarly harsh conditions.
this frequently involves the use of submersible 'dewatering' pumps, centrifugal 'trash' pumps, eductors, or application of vacuum to well points. global dewatering pump market to be valued at $6.4 billion in 2018 according to international business research company visiongain.