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Rotary Vane Pump
A rotary vane pump is a type of 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. This type of pump is considered less suitable than other vacuum pumps for high-viscosity and high-pressure fluids, and is . They can endure short periods of dry operation, and are considered good for low-viscosity fluids. Types The simplest vane pump has a circular rotor rotating inside a larger circular cavity. The centers of these two circles are offset, causing eccentricity. Vanes are mounted in slots cut into the rotor. The vanes are allowed a certain limited range of movement within these slots such that they can maintain contact with the wall of the cavity as the rotor rotates. The vanes may be encouraged to maintain such contact through means such as springs, gravity, or centrifugal force. A small amount of oil may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pompe à Palettes
Pompe may refer to: People * Annelie Pompe (born 1980), adventurer and athlete from Sweden * J. L. C. Pompe van Meerdervoort (1829–1908), Dutch physician based in Japan * Joannes Cassianus Pompe (1901–1945), Dutch pathologist * Kurt Pompe (1899–1964), German Nazi SS concentration camp commandant * Walter Pompe (1703–1777), Flemish master-sculptor Other uses * Glycogen storage disease type II, or Pompe disease See also * Calliotropis pompe, a species of sea snail * Rue de la Pompe, a street in Paris, France ** Rue de la Pompe station {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Vapor Deposition
Chemical vapor deposition (CVD) is a vacuum deposition method used to produce high-quality, and high-performance, solid materials. The process is often used in the semiconductor industry to produce thin films. In typical CVD, the wafer (electronics), wafer (substrate) is exposed to one or more Volatility (chemistry), volatile wikt:precursor, precursors, which chemical reaction, react and/or chemical decomposition, decompose on the substrate surface to produce the desired deposit. Frequently, volatile by-products are also produced, which are removed by gas flow through the reaction chamber. Microfabrication processes widely use CVD to deposit materials in various forms, including: Single crystal, monocrystalline, polycrystalline, amorphous, and Epitaxy, epitaxial. These materials include: silicon (Silicon dioxide, dioxide, silicon carbide, carbide, silicon nitride, nitride, silicon oxynitride, oxynitride), carbon (carbon (fiber), fiber, carbon nanofibers, nanofibers, carbon nanot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powerplus Supercharger
The Powerplus is a design of supercharger that was used to boost the performance of car engines in the 1930s. It is a mechanically driven supercharger#Positive displacement, positive displacement pump, operating on the rotary vane pump, sliding-vane principle. MG cars Powerplus is best known through its use on some MG (car), MG cars of the 1930s. MG specialised in small, lightweight "Midget" cars. Use of supercharging allowed engines of under 750 cc, 850 cc or 1,100 cc to generate competitive amounts of power, whilst still remaining in these small-engine classes. The Powerplus design was the invention of George Eyston, Captain George Eyston, the land speed record holder. Supercharging first appeared on production MGs with the MG C-type, C type or Autodrome de Montlhéry, Montlhéry Midget, inspired by Eyston's EX120 record-breaker of 1930 – the first 750 cc car to break 100 mph. In the 850 cc class, the 846 cc MG J-type#J3, J3 and the rar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guided-rotor Compressor
The guided-rotor compressor (GRC) is a positive-displacement rotary gas compressor. The compression volume is defined by the trochoidally rotating rotor mounted on an eccentric drive shaft with a typical 80 to 85% adiabatic efficiency. History The development of the GRC started in 1990 to minimize the use of compressor valve plates and springs by using simple inlet/discharge ports. Uses The guided-rotor compressor is under research as a hydrogen compressor for hydrogen stations and hydrogen pipeline transport. See also * * * References Gas compressors Gas technologies {{engineering-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyether Ether Ketone
Polyether ether ketone (PEEK) is a beige coloured organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications. It was invented in November 1978 and brought to market in the early 1980s by part of Imperial Chemical Industries (ICI), the PEEK division was acquired through a management buyout, giving rise to Victrex PLC. Synthesis PEEK polymers are obtained by step-growth polymerization by the dialkylation of bis phenolate salts. Typical is the reaction of 4,4'-difluorobenzophenone with the disodium salt of hydroquinone, which is generated in situ by deprotonation with sodium carbonate. The reaction is conducted around 300 °C in polar aprotic solvents - such as diphenyl sulfone. Properties PEEK is a semicrystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperatures. The processing conditions used to mould PEEK can influence the crystallinity and hence the me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerotor
A gerotor is a positive displacement pump. The name ''gerotor'' is derived from "generated rotor (turbine), rotor." A gerotor unit consists of an inner and an outer rotor. The inner rotor has ''n'' teeth, while the outer rotor has ''n'' + 1 teeth, with ''n'' defined as a natural number greater than or equal to 2. The axis of the inner rotor is offset from the axis of the outer rotor and both rotors rotate on their respective axes. The geometry of the two rotors partitions the volume between them into ''n'' different dynamically-changing volumes. During the assembly's rotation cycle, each of these volumes changes continuously, so any given volume first increases, and then decreases. An increase creates a vacuum. This vacuum creates suction, and hence, this part of the cycle is where the inlet is located. As a volume decreases, compressibility, compression occurs. During this compression period, fluids can be pumped or, if they are gaseous fluids, compressed. Gerotor pumps are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gear Pump
A gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic machinery, hydraulic fluid power applications. The gear pump was invented around 1600 by Johannes Kepler. Gear pumps are also widely used in chemical installations to pump high-viscosity fluids. There are two main variations: ''external gear pumps'' which use two external spur gears, and ''internal gear pumps'' which use an external and an internal spur gear (internal spur gear teeth face inwards, see below). Gear pumps provide positive displacement pump, ''positive displacement'' (or ''fixed displacement''), meaning they pump a constant amount of fluid for each revolution. Some gear pumps are designed to function as either a Hydraulic motor, motor or a pump. Theory of operation As the gears rotate they separate on the intake side of the pump, creating a void and suction which is filled by fluid. The fluid is carried by the gears to the discharge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sackville, New Brunswick
Sackville is a former town in southeastern New Brunswick, Canada. It held town status prior to 2023 and is now part of the town of Tantramar, New Brunswick, Tantramar. Sackville is home to Mount Allison University, a primarily undergraduate liberal arts university. The university welcomes roughly 2200 students per academic year. Historically based on agriculture, shipbuilding, and manufacturing, the economy is now driven by the university and tourism. Initially part of the French colony of Acadia, the settlement became part of the British colony of Nova Scotia in 1755 following the Expulsion of the Acadians. History Pre-European Present-day Sackville is in the Mi’kmaq district of Siknikt (to which the place name Chignecto may be traced), which roughly comprised Cumberland County, Nova Scotia, Cumberland, Westmorland County, New Brunswick, Westmorland and part of Albert County, New Brunswick, Albert counties. The Mi’kmaq settlement, Goesomaligeg, was on Fort Beausejour Ridge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prior Art
Prior art (also known as state of the art or background art) is a concept in patent law used to determine the patentability of an invention, in particular whether an invention meets the novelty and the inventive step or non-obviousness criteria for patentability. In most systems of patent law, prior art is generally defined as anything that is made available, or disclosed, to the public that might be relevant to a patent's claim before the effective filing date of a patent application for an invention. However, notable differences exist in how prior art is specifically defined under different national, regional, and international patent systems. The prior art is evaluated by patent offices as part of the patent granting process in what is called "substantive examination" of a patent application in order to determine whether an invention claimed in the patent application meets the novelty and inventive step or non-obviousness criteria for patentability. It may also be considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agostino Ramelli
Agostino Ramelli (1531–ca. 1610) was an Italian engineer best known for writing and illustrating the book of engineering designs ''Le diverse et artificiose machine del Capitano Agostino Ramelli'', which contains, among others, his design for the bookwheel. Ramelli was born in Ponte Tresa or Mesanzena, today in Switzerland. During the Siege of La Rochelle (1572–1573), he successfully engineered a mine under a bastion and breached the fortification,"One Good Turn: A Natural History of the Screwdriver and Screw" Witold Rybczynski p.47 making him popular with his commander, Henri d'Anjou, who later became King Henri III of France. In 1588, Ramelli published ''Le diverse et artificiose machine del Capitano Agostino Ramelli'', or ''The various and ingenious machines of Captain Agostino Ramelli''. The book contains 195 designs, over 100 of which are water-raising machines, such as water pumps or wells.Brashear, RonaldRamelli's Machines Smithsonian Libraries. Other d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louver
A louver (American English) or louvre (Commonwealth English; American and British English spelling differences#-re, -er, see spelling differences) is a window blind or window shutter, shutter with horizontal wikt:slat, slats that are angled to admit light and air, but to keep out rain and direct sunshine. The angle of the slats may be adjustable, usually in blinds and windows, or fixed, such as in shutters. History Louvers originated in the Middle Ages as lantern-like constructions in wood that were fitted on top of roof holes in large kitchens to allow ventilation while keeping out rain and snow. They were originally rather crude constructions consisting merely of a barrel. Later, they evolved into more elaborate designs made of pottery, taking the shape of faces where the smoke and steam from cooking would pour out through the eyes and mouth, or into constructions that were more like modern louvers, with slats that could be opened or closed by pulling on a string. C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum
A vacuum (: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective (neuter ) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a ''perfect'' vacuum, which they sometimes simply call "vacuum" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. In engineering and applied physics on the other hand, vacuum refers to any space in which the pressure is considerably lower than atmospheric pressure. The Latin term ''in vacuo'' is used to describe an object that is surrounded by a vacuum. The ''quality'' of a partial vacuum refers to how closely it approaches a perfect vacuum. Other things equal, lower gas pressure means higher-quality vacuum. For example, a typical vacuum cleaner produces enough suction to reduce air pressur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
