Industrial pump terminology and interpretation

Industrial pump terminology and explanation: 1, hydraulic model: that can meet the performance requirements of the product flow channel shape and size, including impeller, pump body, pump cover, guide vane, etc., is the core of pump products, protection products Performance of the premise; 2, the flow path: refers to the channel through the fluid, its rationality and surface roughness is the key to meet the performance of the product; 3, over-current components: refers to the transmission medium flow components, mainly pump, impeller , The pump cover, the shaft, the middle section, the guide vanes, etc .; 4, the medium: refers to the fluid being transported; 5, conditions: refers to the actual work of industrial pumps parameters collectively, including flow, The amount of medium conveyed by the internal pump; 7, lift: the unit of energy through the pump medium after the increase in value, under normal circumstances the liquid column height of the medium to convey, he can not simply understood as a height dimension, Energy point of view to understand; 8, speed: the number of rotations per unit time pump rotor; 9, shaft power: the prime mover power delivered to the pump, rather than representing the entire unit The total power consumed; 10, the effective power: the unit of time the medium from the pump to obtain energy; 11, efficiency: the ratio of effective power and shaft power; 12, vibration: pump work due to rotor operation and medium and unit Interaction and other causes of the unit related components and the whole machine in a certain range of jitter phenomenon, under normal circumstances, said vibration intensity; 13, noise: the unit as a result of work sound, generally expressed in decibels, more than 70 decibels have an impact on the environment; 14, specific speed: is a hydraulic characteristic parameters, he said the pump flow, lift, speed of the relationship between the three is a dimensionless quantity, is the two water pump virtual similarity feature ; 15, NPSH: refers to the pump in order to work without cavitation occurs, at the pump impeller inlet, the unit weight of the medium must have surplus energy than the vaporization pressure, he and the pump lift the opposite, said Is the suction capacity of the pump (pump lift is the performance of the pump outlet), this value is generally determined by the manufacturer through testing The smaller the value of the pump cavitation performance is better; 16, the performance curve: that the pump performance of the relationship between the parameters of the curve, under normal circumstances with the flow rate changes of other parameters that the law of change; 17, Parallel: refers to the installation of two pumps at the end of the connection; 18, series: especially the two pumps were associated with the installation of the end; 19, Suction: refers to the pump unit liquid in the first stage impeller centerline And the lowest level of the liquid pool between the energy difference, generally expressed in height m, he is a dynamic value that can change with the flow; 20, tube resistance: transmission medium flow through the pipeline and pipe fittings, the loss of energy (Resistance), under normal circumstances, per 100 meters of pipeline losses, he can change with the flow; 21, density: the quality of the unit volume of the medium, affecting the pump shaft power; 22, vaporization pressure: 20 ℃ Liquid a lot of vaporization of the critical pressure; 23, concentration: generally refers to a medium dissolved in another unit medium (mainly water) in the amount of volume concentration, mass concentration , Molar concentration, corrosive corrosive media have a very big impact; 24, temperature: refers to the transmission medium temperature level, the pressure of volatile media, corrosive corrosive media, the risk of flammable and explosive media 25, viscosity: refers to the medium viscosity, will directly affect the pump flow, head, shaft power and other parameters, therefore, encountered a higher viscosity of the media should pay special attention to; 26, flash point: refers to the flammable and explosive medium can occur under atmospheric pressure explosion critical temperature; 27, corrosive: refers to the media on the pump overcurrent parts of the material to produce the devastating effect, under normal circumstances mainly for chemical medium In terms of, should pay special attention to encounter; 28, axial force: the direction of pump work generated from the back of the impeller impeller suction force, including hydraulic axial force and vertical pump rotor weight of two parts; 29, Radial force: the direction of the pump work generated from the pump shaft to the park outside the impeller force; 30, the pump body: impeller cavity work; 31, the impeller: centrifugal water Of the heart, the pump centrifugal force generated by the rotation of the impeller work on the media delivered, and other structures of the pump unit is to allow the impeller to efficient and stable operation; 32, the pump cover: together with the pump body to form the impeller Working chamber; 33, flange: connecting parts of water pump and pipeline, the size of which have been standardized, the current national standard GB25551-1982.

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