What is a vortex pump?

A pump that delivers liquid by rotating a star-shaped impeller between covers with discontinuous channels is called a vortex pump. Its working principle is: When the star wheel rotates, centrifugal force is generated. Under this centrifugal force, the liquid flows into the root of the blade from the side hole of the pump casing and is thrown to the outer circle to enter the groove of the cover on both sides. This part of the original blade with a circular motion of the original, with a certain speed, the speed in the cover channel can become pressure energy. After it was snapped by the leaves. During the passage of the liquid mass from the inlet to the outlet, this effect is repeated several times, increasing successively as the liquid is subjected to the action of a multistage impeller in centrifugal pumps. The liquid moves in the channel with the star-shaped impeller. At the cut-off point, the liquid flows out of the outlet hole due to the sudden blockage of the channel. The outlet opening is provided in the outlet cover, on the inlet cover, an inlet opening is provided which, in the event of sudden appearance of the channel behind the cut-off area, is here apparently a negative pressure in order to draw in the liquid. Vortex pump has a good self-priming function. Vortex pump pressure and flow were: H = φu² / 2g Q = cF Where u - impeller circumferential speed; φ - coefficient, take 3.5 ~ 4.5; F - channel cross-sectional area; Flow velocity, approximately taken c = u / 2 or (0.55 ~ 0.65) u. Impeller leaves generally 24 to 60. The characteristic curve of a vortex pump is somewhat similar to that of a centrifugal pump, but it appears steeper. Its flow rate is small and the pressure head is large, but its efficiency is not high. Vortex pump side of the gap (that is, between the impeller and cover the gap) can not get too much, otherwise it will significantly reduce the efficiency, so this pump can only deliver relatively pure liquid. Vortex pump maintenance should be measured when the gap: 1, the axial clearance between the impeller and both sides of the cover. General 2a = 0.17 ~ 020 mm, measured by pressure lead wire method. 2, impeller and pump casing radial clearance. The general radial direction to take c = 0.15 ~ 0.20 mm, with feeler gauge. 3, bearing clearance, generally take b = 0.10 mm or so, with feeler or vernier caliper measurement. 4, Coupling assembly clearance. General i = 1 mm, d = 4 ± 0.5 mm, measured with vernier caliper and sounding scale. 5, the impeller and the key with the impeller and the shaft are with the slide fit. The key top clearance should be not less than 0.20 mm, two test gap should be 0.01 ~ 0.04 mm.

Soft Close Square Shape Toilet Seat

Square toilet seats are a common toilet accessory

  1. DESIGN AND APPEARANCE: The square Toilet Seat generally has a clean and generous design with smooth lines and a more traditional appearance. It matches the shape of most toilets, is easy to install, and is easy to clean.
  2. Materials: Common materials include plastic, wood and resin. These materials are usually durable, waterproof and easy to clean.
  3. Size and fit: When purchasing, make sure you choose a toilet seat that matches the size of your toilet. Different toilet models may require different sizes of toilet lids, so be sure to measure your toilet and refer to the product description or consult with a salesperson to ensure that you are purchasing the right lid for your toilet.
  4. Installation: Most square toilet seats are relatively easy to install, usually by aligning the cover with the toilet seat and following the product instructions.
  5. Cleaning and Maintenance: Regular cleaning of the toilet seat will keep it hygienic and prolong its life. You can use a mild detergent and a soft cloth to wipe the surface of the toilet lid, avoiding harsh chemical cleaners.

Installation and use: when installing a square toilet seat, you need to follow the instructions in the product manual. Generally speaking, you need to fix the mounting feet first, and then place the toilet cover against the insert bar, and make sure that the front edge of the toilet is left with one to two centimetres of reserve. In the process of use, you need to pay attention to keep the toilet cover clean, avoid standing or placing heavy objects on the toilet cover to ensure its normal use and prolong its service life

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