Plastic Bearing Roller: Hebei Naimei Bearing Co., Ltd. produces kinds of plastic bearing rollers,customized plastic roller, which are applied widely into Heavy Sliding Door Series, Hollow Doors to Wheel, Hollow Doors Last Round, Shift Door Series, Shift Door Last Round, Shift Door Next Round and other series. Plastic Rollers/ Pulleys in our company are rich in colors, exquisite in craft, like violin melodious music, with a variety of decorative intersection elegant melodies, allowing you to indulge in a variety of life changes among the wonderful scene. They are not only of competitive price, stable quality, but with strong after-sale service and dedicated staff attention. Please send your drawing or design, let's work together.
Hebei Naimei Bearing Co., Ltd. produces types of plastic bearing rollers:
1). Material: Carbon Steel/ Chrome Steel Bearing + Plastic( POM/ NYLON) Injection;
2). Application: for Aluminium Door and Windows; Aluminium Hardware Accessories and other sliding applications;
3). Plastic Color: Various, as per Request;
-- For any detailed inquiry of Non-Standard Bearing rollers, pls contact us freely. We will make a response within 12 hours.
Sliding Plastic Roller - Factory Direct Hot Sale
Bearing rings: Dimension tolerance, geometric tolerances, and surface quality of bearing` s working surface will influent the operating noise. Naimei Bearing adopts precision CNC machining to dimension precision, geometric tolerances, design drawing, mold making, grinding, cleaning, assembly, testing, every link of strict checks, so as to ensure all our products are tested by our strict criteria.
Balls: The balls evenly with by the cage, often make rolling movement between 2 rings. The shape, size and number will directly influent bearing`s load tolerance and operating capability. We use high precision, small vibration steel ball. It`s surface must be strengthened, no bumps scratches, lacerations, pitting and notch.
Cage: Enclose and move with all or part of the balls. It also be used to insulate the balls, guide the balls` movement and to improve lubrication performance inside the bearing., etc. Naimei Bearing`s cage is commonly made of cold rolling carbon steel. But in the corrosiveness environment, nonparallel or high-speed situation, stainless steel, engineering plastics cagecan be decided on request.
Seal: Naimei Bearing adopts different kind of seal material to meet the requirement of their operating in high temperature and being compatible with grease. Acrylonitrile-butadiene rubber is our standard material. but in high temperature environment ,often adopt fluorocarbons, silicone , PTFE shield.
Plastic Bearing Roller Plastic Bearing Roller,Groove Plastic Roller,Convex Plastic Roller,Door Pulley Wheel Hebei Naimei Bearing Co., Ltd. , https://www.nmn-bearing.com
First, several factors that affect the efficiency of centrifugal pump group
Centrifugal pump efficiency is the product of mechanical, volume, and hydrodynamic efficiency. The efficiency of the pump set is the product of pump efficiency and motor efficiency. The main reasons for the low efficiency of the centrifugal pump group are as follows:
1. The efficiency of the pump itself is the most fundamental effect. For pumps under the same operating conditions, the efficiency may differ by more than 15%.
2. The operating conditions of the centrifugal pump are lower than the rated operating conditions of the pump. The pump efficiency is low and the energy consumption is high.
3. The motor efficiency remains basically unchanged during use. Therefore, it is important to choose a high-efficiency motor.
4. The influence of mechanical efficiency is mainly related to design and manufacturing quality. After the pump is selected, the impact of later management is less.
5. Hydraulic losses include hydraulic friction and local resistance loss. After the pump has been running for a certain period of time, it will inevitably cause the surfaces of the impeller and guide vanes to wear out, the hydraulic loss will increase, and the hydraulic efficiency will decrease.
6. The volume loss of the pump, also known as the leakage loss, includes three kinds of leakage losses: the impeller seal ring, the interstage, and the axial force balance mechanism. The volumetric efficiency is not only related to design and manufacturing, but also related to later management. After a certain period of continuous operation of the pump, due to friction between the components, the gap increases and the volumetric efficiency decreases.
7. Due to blockage of the filter cylinder, intake of the pipeline, etc., the centrifugal pump was pumped out and idling.
8. Before starting the pump, employees did not pay attention to the preparatory work before the start of the centrifugal pump, and the basic operating procedures such as the warm pump, disc pump, and infusion pump were not thoroughly performed, which often caused cavitation of the pump, causing large pump noise, large vibration, and low pump efficiency.
Second, reduce the centrifugal pump energy consumption, improve the efficiency of the pump group should take measures
1. Replace the inefficient centrifugal pump. When replacing, use a centrifugal pump that is close to the actual operating conditions to ensure that the replaced pump always runs in a highly efficient state.
2. The application of frequency conversion energy-saving technology. For centrifugal pumps with design parameters greater than the actual operating conditions, the frequency conversion speed control device is installed and is always operated in the high efficiency zone.
3. Promote the use of energy-efficient permanent magnet speed control motors and dual power motors and other new energy-saving products in the main centrifugal pumps.
4. Centrifugal pump selection. When selecting a new pump, the pump produced by the brand manufacturer should be selected to ensure high efficiency of the centrifugal pump.
5. Centrifugal pump maintenance.
(1) Always check and adjust the shaft end seal of the centrifugal pump to reduce the volume loss;
(2) After the centrifugal pump has been operated for 10,000 hours, it shall be overhauled to restore the pump efficiency;
(3) Spread the application of bellows sealing technology on centrifugal pumps to completely eliminate the leakage of centrifugal pumps and increase the volumetric efficiency.
6. Periodically clean the filter cylinder and check the connection of the pipeline to ensure that the centrifugal pump inlet line is unblocked.
7. Strictly follow the operating principle of the centrifugal pump. Before starting the pump, perform a disc pump, open the inlet valve, close the outlet valve, exhaust the exhaust, and check that the inlet pressure of the pump meets the requirements. To prevent pumping cavitation from occurring due to low fluid supply pressure and insufficient flow.
8. Centrifugal pumps are regularly tested for pump efficiency. For pumps with low pump efficiency, the cause must be found in a timely manner and appropriate measures must be taken to resolve them.
When a centrifugal pump is used to pump a mud flow containing large, medium, and small sized material in a liquid, the liquid is sprayed in a tangential direction into the cylindrical chamber to form a vortex, and a portion of the liquid is removed from the chamber in a tangential direction The slurry is injected axially into the chamber and the vortex separates the large size material from the rest of the slurry and the liquid; the remaining mud and liquid are axially removed from the chamber and injected into the inlet of the centrifugal pump; The material coming out of the centrifugal pump serves as a spray liquid for forming the vortex, thereby reducing the wear of the impeller of the centrifugal pump and improving the efficiency of the centrifugal pump.
When a centrifugal pump is used to pump a mud flow containing large to small size materials in a liquid, the method of reducing the wear of the centrifugal pump impeller and increasing the efficiency of the centrifugal pump is characterized in that it includes:
a. The liquid is tangentially sprayed into the vortex chamber to form a vortex, and a portion of the liquid is tangentially removed from the chamber;
b. The slurry is injected axially into the chamber, and the vortex separates the large-size material from the rest of the slurry and liquid;
c. The remaining mud and liquid are axially removed from the chamber and sprayed into the inlet of a centrifugal pump;
d. The material from the centrifugal pump is used as the ejecting liquid for forming the vortex; therefore, the large-sized material is moved toward the outer circle of the vortex, and as a result, medium, small, and size materials and liquids are injected. The centrifugal pump, therefore, reduces wear of the impeller and allows the pump to run at high speed, thus increasing efficiency.
How to ensure the high efficiency of centrifugal pump during operation and operation
First of all, we must analyze the factors affecting the efficiency of the centrifugal pump, and put forward improvement measures to improve the efficiency of the centrifugal pump and reduce the energy consumption of the equipment.