A washing machine section is an apparatus used to remove contaminants or dirt, such as dirt, dust, carbon, oils, fats, metal flakes, cutting liquids, mold release agents, inks, paints, and corrosion of objects work. Parts washers are used in new manufacturing and remanufacturing processes; they are designed for cleaning, degrease and dry bulk loads of small or large parts in preparation for assembly, inspection, surface treatment, packaging and distribution. Component washing machines can be as simple as manual "sink-on-a-drums" for many auto repair shops, or they may be very complex, multi-stage units with component handling systems. The component washing machine is essential in maintenance, repair and remanufacturing operations as well, from cleaning fastener, nuts, bolts and screws to diesel engine blocks and related parts, rail bearings, wind turbine gear boxes and automotive assemblies.
A washing machine is clearly different parts of the pressure washer in the parts of the washing machine that normally clean the parts automatically in a closed cabinet, while the pressure washer usually has a single spray jet mounted on the end of a manually operated stick. Modern industrial technology makes it possible to combine many parts of the finishing process into one. As an integrated part of the manufacturing process, automatic parts washers can load, wash, rinse, dry and unpack components in an automated cycle.
In industry, chemical solvents are commonly used to remove oils, fats and impurities during the cleaning process, but recent environmental and regulatory issues have encouraged the innovation of natural, non-chemical based detergents.
Video Parts washer
History
The washing machine parts were originally developed for use in automotive transmissions and machine workshops as a way to improve the function of simple soak tanks. The soak tank is a vat filled with a mixture of water and detergent, which takes hours to "soften" the dirt, liquid, tar, and oil enough to rinse manually before it is disassembled and repaired.
Since the late 60s, many parts cleansing methods have been developed with better levels of security and reduced environmental impact. Solvent Stoddard, gasoline, diesel, and kerosene are usually used to clean and dissolve parts. Then, the chlorinated solvent in the vapor of the steam becomes the industry standard. During the 1980s environmental and safety issues led to the prohibition of chlorinated solvents for cleaning parts. Water-based cleaning systems take on new advantages that lead to many improvements, in systems and processes. In 1971, Gary Minkin developed an aqueous spray washer to remove automobile components. Minkin breakthrough uses hydraulic impact strength forces to significantly increase the cleaning power of the washer component washers.
Maps Parts washer
Cleanup method
In addition to high mechanical energy, higher cleaning temperatures are one of the most effective methods for improving cleaning results in the washing machine parts. In general, 10 to 15 Â ° F (5 to 8 Â ° C) doubled the chemical reaction of the detergent. Increased chemical reactions between greases and oils and detergents provide faster cleaning cycles and cleaner parts. In addition, all greases and oils show lower viscosity at higher temperatures. The temperature of the cleaning solution is 170 Â ° F (77 Â ° C) and above softens or melts most of the oil and grease that causes them to flow like water so it is easily removed so as to result in faster cleaning, better results and cleaner parts. Many parts of the washing machine are unable to maintain this operating temperature due to lack of heating system. In addition, careful design is required of the pumping system so as to attract and provide a cleaning solution at near-boiling temperatures in the washing machine parts. All centrifugal pumps require clean positive suction head (NPSHr) to be able to pump solution. As the solution temperature approaches NPSHr, the pump stops pumping because the cleaning solution turns into steam in the pump intake. Careful pump design is required to minimize NPSHr and enable pumping of high temperature cleaning solutions.
Typical parts washers may be watery or use solvents.
Solvent-based
Ben Palmer invented a solvent-style washing machine in 1954. The washing machine was successful from the beginning, and he decided in the early 1960s not to sell the machine but rent it out to customers and serve it by removing and refilling the solvent. Since the early 1990s there have been significant changes to water-based systems due to the environmental and safety hazards associated with the solvent system.
A solvent-style washing machine is filled with a few gallons of solvent stored in a deposition pan at the bottom of the washer. A small, tight electric fluid pump is applied in a clean solvent and solvent from near the top of the precipitation tank, and pumps it at low pressure through a rigid flexible nozzle to the metal lattice above the liquid in which the metal components are rested. Dirt and fat dissolved fat fell to the bottom and settles at the bottom of the tank.
Originally, oil refining mixtures such as gasoline, diesel, thin lacquers or kerosene are used in solvent-operated solvent-based cleaning parts, but they are volatile and can burn easily, potentially causing explosions and severe burns to workers. For this reason, solvent-based "basin" washers usually have a large cover supported by a fusible lead junction. In case of fire, the lead will melt and the cover will close to extinguish the fire before it can cause further damage to the building...
Water based
Water-based component cleaners are very similar to large dishwashers. It uses water and detergent combined with heat and mechanical energy to provide cleaning action. There are two main styles of washing aqueous part process, jet spray process and power washing process. In a washing machine the parts of the cabinet, the parts are placed on the turntable and the door is closed. During the cleaning cycle, the heated solution is flooded or destroyed in parts when the turntable is rotating. Many systems have washing, rinsing, and drying cycles. When the cycle is over, the door is opened and parts are removed.
There are four main factors affecting the cleansing results in the aqueous part wash. These factors are mechanical energy, temperature, detergent and time. Adjusting any of these factors in the cleaning cycle will change the cleaning result. The washing machine parts with large amounts of mechanical and high temperature energy produce shorter cleaning cycles and use less of the cleaning detergent. Mechanical energy is provided by the pump drive system. Most aqueous washers use an electric motor to drive a centrifugal pump. The mechanical energy delivered to the washing load is what determines the mechanical energy for cleaning and not the pump's horsepower. The efficient use of pump motor motors through well designed centrifugal pumps and attention to detail of the piping design and the nozzle type is essential to put the most mechanical energy into the cleaning process. In addition, one should consider the volume of work from the parts washing machine. To achieve the same result, from one machine size to another, the power density must be the same for the given work volume. This factor requires that a higher horsepower pumping system be used when the working volume increases exponentially on larger diameter engines.
Water-based component cleaners use alkaline detergents mixed with water to clean the parts. This solution is safer than solvent-based systems because the risk of burning cleaning solutions is eliminated. The detergent for the washing of the aqueous part may be in powder or liquid form. Each form has its own advantages and the cleaning application of certain parts will determine the best shape. In general, powder detergents are more aggressive and are commonly used in maintenance and rebuilding while liquids are more commonly found in lightweight cleaning applications that were once the domain of grease lubrication.
Jet spray vs power washing process
A jet spray washing machine cleans by flooding the section with a warm chemical solution and high chemical concentration to clean the parts. In the process of power washing, the parts are destroyed with a hot chemical solution utilizing the hydraulic collision strength of the cleaning solution as the main cleaning mechanism. The washing machine components using the power washing process operate at very low detergent cleaning concentrations. The lower concentration causes the cleaning solution to last longer before it becomes saturated and requires disposal. In addition, low concentrations of cleaning chemicals allow detergent rinsing of the easier parts so as to minimize the need for the rinsing cycle thus saving water and cycle time. The last factor used in power washing is an oscillatory oscillating system that is out of sync with turntable rotation. This system ensures that the blasted solution reaches all areas of load portion blinded by the stationary manifold used in the jet spray process. All things considered to be a power washing process are superior to the jet spraying process for faster and thorough component cleaning cycles and minimize the use of detergent and waste generation. Power washing processes are generally effective for difficult soil stripping applications such as burning hydrocarbons, paints, scales, varnishes, carbon, mastic or rubber. Additional power washer types of applications generally include diesel engine cleaning, aerospace components, aluminum car engine parts and rolling mill equipment.
There are several considerations when using a relatively high "horsepower" power washing process, so high-current motors requiring adequate resources are used with the same high washing pressure which requires that parts be adequately secured to the turntable. The process of "jet spray" is found to be sufficient to clear applications that do not involve difficult soil removal but in general the power cleansing process is a superior cleaning process.
Power density
A part washer can be characterized by its power density. The power density is calculated by dividing the total horsepower of all pumping systems providing the washing function with total working volume for the washing function. The typical unit is horsepower per cubic foot. The results of this calculation offer a starting point in comparing the various parts of the washing system. The amount of power density is also useful when it is desired to achieve the same cleaning and output standards in different working volumes. Note that the power density calculation does not take into account the efficiency of the pump system and assumes that all energy delivered to the pump is sent to the washing load. More accurate power density will consider pump pump efficiency as efficiency varies greatly even from identical pumps because efficiency is highly dependent on pump operating point, piping design and frictional losses in the system.
References
External links
- Gasoline Sprayer for Cleaning Machine Parts , Popular Science monthly, February 1919, page 127, Scanned by Google Books: https://books.google.com/books?id = 7igDAAAAMBAJ & amp; pg = PT46
Source of the article : Wikipedia
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