First, check the most easily damaged parts. Submersible pump impeller, buckle, bushings, housings, etc. are vulnerable parts. First of all submersible pump should be removed, check the fragile parts are intact. Prohibit the use of damaged and unqualified submersible pump parts II, timely inspection and replacement of lubricants. To ensure the normal lubrication system, you need to regularly check the lubricating oil, then to open the seal chamber and the motor within the hole screw, the sealed chamber and the internal motor oil all released, replace the new oil three, to prevent rust The demolition of the pump shell. Spring before use, should be disassembled pump casing at the top, turn the impeller and then start closing, to prevent rusting parts can not start normally and burn the motor. This maintenance is particularly important for water-filled motor Fourth, to ensure good sealing performance. Agricultural submersible pumps on the sealing requirements are very strict, in the replacement of sealed chamber lubricant, if you find the oil cloudy and moisture content, you must replace or replace the seal box or seal the entire ring to ensure good sealing performance Fifth, the drying Motor: Measure the insulation resistance of the submersible pump windings and the housing with a 500 megaohms meter. If the resistance is less than 0.5 megohms, remove the motor moisture. Drying methods are: external drying method, current drying method and the combination of both at the same time dry. External drying method is the use of external heat source for processing, commonly used measures are: ⑴ hot air: the use of electric heater blower (small submersible pump available hair dryer) hot air blowing to achieve the purpose of drying; ⑵ bulb baking: Closed box, the use of several 200-watt light bulbs for baking. Note that the baking temperature can not be too high, should be controlled below 125 ℃; ⑶ current drying: According to the submersible pump impedance and power supply size of the motor windings in series or in parallel, and then access a variable resistor, adjust the current About 60% of the rated current, power drying six, bearing lubrication must be sure. Inspect the water-filled submersible pump regularly and replace the skeleton oil seal and lithium grease of the upper and lower end cap bearing chamber. To ensure long-term lubrication of the bearing in good working condition Seven, to ensure that the inspection bearings. Before each use need to check the motor part of the upper and lower bearings, if found to wear or clearance is too large, must be promptly replaced with new bearings, is strictly forbidden to make improper use. Check the method is as follows: 1, if the motor is running, resulting in carbolic sound, and the cycle and speed is proportional to, and feel trouble when the rotor is rotated, the bearing raceway is a bit astringent or avulsion phenomenon; 2, Intermittent sizzling sound, turning the rotor by hand when there is an indefinite dead, usually broken ball cage, the inner ring broken ball or broken. In the event of these circumstances, the bearings must be replaced to avoid further damage.
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In wax pattern making, as you know, it is better than polyethylene, and the wax deformation is small. In dipping slurry process,most of the suppliers adopt water glass technics in domestic area,but we adopt compound technics or silica sol technics. As you know, carbon steel castings will be much smoother with compound technics (compound of water glass and silica sol technics),this method is so popular with our customers, and the quality is higher than water glass technics, the cost is lower than silica sol technics.
In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at 24℃±1℃, which can make the castings much more stable,the internal tissues much more well-proportioned.
Our mechanical parts as precision casting products have quality assurance in accordance with ISO9001: 2008, strict material inspection and exact dimension control, with 100% quality control. OEM order is welcome. The parts can be made completely based on your specifications such as drawing, design, sample etc.
Precision Casting Of Mechanical Parts
Mechanical Precision Casting,Investment Casting for Mechanic Parts,Machinery Part Precision Castings,Mechanical Part Investment Castings
Wei fang junlong precision casting Co.,Ltd , https://www.junlongcasting.com
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