Fire pump abnormal rotating parts

[Asia Fluid Network News] China's fire pump a wide range of different, depending on the use of occasions, different uses, different types of power sources, such as different models of products. Fire pump rich variety of jobs for different positions to provide a very important help, but such products in the course of the use of some things will happen, such as fire pump rotating parts abnormalities, when this happens, the user needs to find The reason, the right medicine. Abnormal fire pump rotating parts 1, the axis corresponding to the solution to the problem of bending: straightening axis or on request replacement. 2, Wear ring between the running gap is not correct Corresponding solution: Check the gap is correct. Replacement of the pump housing or impeller wear ring as required 3, the pump casing pressure is too large Corresponding solution to the problem: eliminate the stress and manufacturers on behalf of the Advisory. After eliminating the stress, check the alignment. 4, shaft or impeller ring swing too much Corresponding solution to the problem: Check the rotating parts and bearings, replace worn or damaged parts as required. 5, the impeller and the pump housing wear rings between the dirt, pump housing wear rings in the corresponding solution to the problem: cleaning and inspection of wear rings, as required replacement. Cut off and eliminate the source of dirt. In addition to the above 5:00, but also need to pay attention to the middle of the impeller exit centerline of the impeller of the volute pump impeller outlet should be aligned with the center line of the volute inlet. If not correct, should be in the impeller hub and shoulder by adding gasket adjustment. The two neutrals should be controlled within a 0.5 mm range. Pump slightly larger than the number of revolutions on the performance of the pump slightly less for medium and low pump speed due to the impeller exit is very narrow, such as the impeller exit width of only 10 mm, if the volute and the midline deviation of 1 millimeter, the fire Pump performance has a significant impact. It is recommended to adjust the two midline (impeller and volute) error control within 5% of the exit of the impeller as well. Through the introduction of more than the above, the fire pump rotating parts caused by abnormal we already have a certain understanding. The use and function of such equipment as fire pumps are loved by the modern people. Such products not only provide good working efficiency, but also play an important role in protecting people's production and life safety. Therefore, if there is a problem with the fire pump, it needs prompt treatment and conclusion.

Velcro Disc

Velcro disc is an abbreviation of sandpaper, a customary name. Velcro disc is also sandpaper. It is a conversion product of sandpaper. Its shape is a positive circle. It is flocked with sandpaper roll , and then put it on the stamping machine for stamping with *** circular die. The stamped product is velcro disc.

Sanding disc can be divided into two types according to the lamination: back glue disc sand and back velvet disc sand (also known as self-adhesive disc sand and brushed disc sand). The fluffed disc sandpaper can be non hole fluffed disc sand paper or hole fluffed disc sand paper. The velcro disc with holes is convenient to discharge waste chips from the holes when grinding objects, so as to improve the grinding efficiency. There are other classification methods. For example, according to the size, the common disc sands are 100mm, 115mm, 125mm, 150mm, 180mm and 215mm in diameter, and the diameter area of disc sands that can be used is 23mm --- 235mm.

According to the sand surface of disc sand, the common ones are white sand disc sand, red sand disc sand, yellow sand disc sand, black sand flocking disc sand, blue sand disc sand, green sand disc sand, grid flocking sand. And classified from the raw materials of disc sand paper, velcro discs can be divided into aluminum oxide velcro disc, silicon carbide velcro disc and zorconia velcro disc. Aluminum oxide velcro disc can be divided into ordinary aluminum oxide velcro disc, calcined aluminum velcro disc and so on. The particle size of disc sand is usually divided into 40# 60# 80# 100# 120# 150# 180# 220# 240# 320# 360# 400# 600# 800# 1000# 1200# 1500# 2000#.

And the application of disc sandpaper is extensive. From the space shuttle to the mobile phones and computers we use, disc sandpaper is used in the production process. Some parts of the space shuttle need to be finely polished with disc sandpaper, and the fuselage needs to be polished with disc sandpaper before spraying paint, so that there will be no paint peeling. Take our common notebook computers for example. If they can have such a mysterious appearance color, they can't lose the fine grinding of disc sand. It is mainly used for polishing, furniture, hardware, electronic accessories. At the same time, the efficiency of disc sandpaper grinding products is very high, which is faster, more convenient and less loss than conventional hand sandpaper grinding; However, the round sand disc also has some shortcomings. At present, with the gradual improvement of the requirements for the surface finish of the ground workpiece, the requirements for the base of the round sand are also higher and higher.

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