Efficient electric machinery matchs impeller cutting technology and reproducing

Summarizing pump is machinery of a kind of fluid, it is the mechanical energy change prime mover to carry the fluid, machine that gives a fluid energy. It is national economy the mechanical equipment with departmental indispensable door, be by wide application in industry, use at carrying a fluid for craft, provide power for irrigation works system. Because pump is much to making it is very important that the daily production of the user moves, bring about an user to be to ensure pump can satisfy all operating mode requirements in the type selecting process of pump too conservative, place choosing pump is allowed to the system the amount is too large. To make sure pump can satisfy systematic requirement adequately, normally oversight has chosen the engineer the cost that great pump place raises, and the security demand that the size that considers to increase pump only will come make sure the system moves. Those who make a person regretful is, this kind of use means brought about more expensive system to move reach cost of care and maintenance. Additional, in inefficient moving operation the condition falls, the matchs than discharge and lift and system pump below pump type selecting is too big general reason condition needs more frequent care and maintenance. Too big flow energy rose to wear away and damage systematic part, bring about valve to damage, pipeline system bear pressure increase those who reach noise issue to appear. People habit calls pump type selecting greatly too " car of big Ma La " phenomenon, handle this kind of phenomenon to have reduce expenditure, bypass, timing, change a few kinds of methods such as displacement of cutting of pump, impeller, impeller, 3 kinds of users are used in front more, the method that uses impeller cutting sometimes in circumstance of power supply of certain tall voltage actually is more simple and effective. Because water pump connects regular meeting to existence is increased and repeat phenomenon of type selecting coefficient when designing type selecting, cause water pump load inferior, old horse presses the case of the car, often make water pump is in condition of travel of light convey by vehicles for a long time, the efficient work area of water pump load is narrower, after carrying gently, often be in inefficient working area. This caused pump system work efficiency low, waste the phenomenon of the sources of energy. Be opposite water pump this kind when 2 times square load undertakes energy-saving reproducing, satisfy normal need to cutting of water pump impeller, adjust the design of electric machinery according to power of axis of the water pump after cutting at the same time, make electromotor and water pump power reasonable match, raise a system to run efficiency, achieve the goal with energy-saving system. 2.

Impeller cutting principle 2.

Cutting of 1 fundamental impeller is to show treatment handles the diameter of impeller to reduce transmit the energy among systematic fluid. The pump size that impeller cutting is designed to what guard overly or systematic bear produced metabolic place to bring about slants big case is a very useful improvement measure. The end that impeller cutting reduced impeller fast, reduced the energy that delivers systematic fluid medium to go up forthrightly from this, and reduced the flow that pump place generates and pressure, following plan institute are shown. Sexual law offerred centrifugal pump likeness to play the academic significance between impeller dimension and pump output in constant pump speed condition: Here: Q= discharge; H= lift; The horsepower of apply the brake of BHP= pump electric machinery (suffix 1= primitive pump, the pump after suffix 2= passes impeller cutting) ; D= diameter is among actual application, as a result of flow nonlinear causing these concerns is not exceedingly accurate; However, impeller cutting is remained to the main effect of discharge, pressure head and power effective. For example, impeller diameter reduces 2% meetings to produce the discharge of about 2% to drop, the pressure head of 4% drops and the power of 6% drops. To less change, similar law can serve as probably judgement, the final result of impeller cutting depends on the change of systematic curve and pump function. 2.

The main profit that the advantage of 2 impeller cutting reduces impeller size is to reduce move reach cost of care and maintenance. The energy that wastes through bypass pipe line and throttle place and the energy that diffuse through systematic noise and vibration can become fewer. The cubic metre that the section energy of impeller cutting basically reduces with the diameter becomes direct ratio. Because electric machinery and water pump are put in an efficiency problem, the power that so electric machinery consumes actually is met power of prep above fluid. Besides energy-saving besides, impeller cutting still can reduce support of valve and pipeline system, pipeline system wear away. The pipeline system vibration that fluid flow produces can bring about conduit to solder place and mechanical connect exhaustion. As the elapse of use time, meeting occurrence crackle mixes welding line and connect become loose, bring about systematic leak to must undertake shutdown is overhauled then. From the viewpoint of the design, too big fluid energy also is not an expectation. Normally the circumstance issues the removed set of conduit bracket and type selecting according to its can the pressure that comes from systematic interior is the static load of susceptive conduit and fluid, laden, and the heat that temperature change place causes expands (the occasion uses in hot motivation) will undertake. When the oscillatory load that place of energy of too big fluid produces is designed, did not consider inside, can bring about overhaul of systematic leak, shutdown and additional care and maintenance so. 2.

When the phenomenon that the scope of application of 3 impeller cutting should list below systematic existence, can consider to use the method of impeller cutting: Most by-pass valve of the system is opened, show the flow inside systematic equipment is too large; The system needs beyond the mark reduce expenditure to control the flow that sheds system or craft; Oscillatory perhaps grade makes clear existence loud noise flow is too large. Pump is far from his to design a dot to move with buy a smaller impeller photograph to compare from manufacturer, the effect of cutting should be differred a bit a few. But, below a lot of circumstances, the vane wheel of smaller size standards that manufacturer can offer is too little to systematic load, sometimes manufacturer is done not have even more diminutive impeller can be offerred. Below this kind of circumstance, impeller cutting may be wholer than changing pump / the method with more practical electric machinery. 3.

Reproducing electric machinery matched technical impeller cutting to change pump shaft power, if electric machinery still uses original word, electric machinery is in hold position gently, electric machinery efficiency is inferior, , our basis needs discharge lift actually, diameter of impeller of cutting water pump, power of electric machinery axis drops according to impeller cube, to make electric machinery of form a complete set is in concentrated area. We fall reproducing of rated power of electric machinery of former form a complete set power design is those who get used to load performance is efficient the efficient electric machinery that run. Electric machinery is efficient reproducing, know small effect electric machinery overweight new design namely, change the method such as component, reproducing is become efficient electric machinery or the system that apply to specific load and operating mode are energy-saving electric machinery. To electric machinery of form a complete set of raw water pump we use original calm rotor effectively, fall former core the efficient electric machinery that power marries after power designs cutting, redesign winding to reduce stator copper cost, new dip lacquer, improve service life of former electric machinery, convert efficient fan and new bearing. Use lid of original baseplate, end to assure according to dimension changeless. 4.

The IS150-125-315 centrifugal pump of limited company of data of chemical industry of Hang Mou of Min of typical case Shanghai procrastinates use electric machinery, the Y200L-4 that uses 6 An Jianghuai production so (30kW) electric machinery, the rated electric current of electromotor is 57.

6A, run electric current actually to be 50A, adjacent be fully loaded with. The discharge of water pump is 60L/S about, lift 30M, the spot discovers actually lift needs 25m only, at present discharge have more than needed, release spare flow through bypass a powerful person. And the impeller after water pump is moving for a long time is serious already and rustily, the loss of efficiency of pump. We pass cutting impeller, because new little vane wheel solves discharge lift,pass big, solved rustily problem at the same time, go up in the design also more accord with hydromechanical relevant theory, accordingly, change the axial power of the pump after impeller is reduced for 23kW. At the same time we are designing YSFE2-200L-4 water pump when special electric machinery, adjusted the scale of the alterable loss of electric machinery and changeless loss appropriately, make the YSFE2-200L-4 water pump of 30kW special electric machinery has taller efficiency around 23kW, moving power reduces 7kW about. With year run time 4000h, year managing specific power consumption is H of · of 7kW × 4000= 28000kW about, investment adds up to 20 thousand, invest pay back period 1 year or so. 5.

The last word changes the lift discharge with wasteful principle through impeller cutting, at the same time operating condition of pair of electric machinery of form a complete set of specific aim have specific aim to redesign, make match with real load raise water pump system to run efficiency, at the same time reproducing as far as possible use old original data, promote the service life of old electric machinery. CNC Milling CNC Machining