Shandong Grid Group Co

< >Anechoic mixed flow fan:
< >A mixed flow fan is a fan between an axial flow fan and a centrifugal fan. The impeller of the mixed flow fan allows the air to move both centrifugally and axially. The movement of air is a mixture of axial flow and centrifugal flow, so it is called mixed flow.
< >Mixed flow (oblique flow) fans have a higher wind pressure coefficient than axial flow fans and a larger flow coefficient than centrifugal fans. They are used in situations where the wind pressure and flow rate are neither large nor small. It fills the gap between axial fans and centrifugal fans. At the same time, it has the characteristics of simple and convenient installation.
Mixed flow fans combine the characteristics of axial flow and centrifugal fans, and their appearance looks more like traditional axial flow fans. The enclosure can have an open inlet, but more often it has a right-angle curved shape that allows the motor to be placed outside the pipe. The excretion shell slowly expands to slow down the flow of air or gas and convert kinetic energy into useful static pressure.
< >Low noise and energy-saving mixed flow fan is a new type of fan between axial flow and centrifugal fans. It has the high pressure of centrifugal fans, the large flow rate of axial flow fans, high efficiency and energy saving. Good, low noise, easy installation and other features. The fan design is novel, the structure is compact, the volume is small, the weight is light, and it is easy to install. The rotation speed is less than r and the noise is lower than B(). When the fan is connected to the pipe and installed in the air-conditioning box, the noise is lower than B(). Low-pressure centrifugal fans are widely used in industrial and civil building ventilation and dust removal.
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< >Bearing temperature exceeding the standard is one of the main reasons for bearing damage. The main reasons for high bearing temperatures are as follows:
() Poor lubrication quality. The purpose of lubrication is to prevent the moving and static parts from directly contacting each other to cause friction, but to form friction between solid and liquid. If the quantity of lubricating oil is insufficient or the quality is poor, the moving and static parts will cause direct friction and heat, or the heat cannot be taken away through the lubricating oil, causing the bearing temperature to rise.
() The rolling bearing assembly quality is poor. If the tightness between the inner sleeve and the shaft is not enough, the gap between the outer sleeve and the bearing seat is too large or too small.
() The bearing quality is poor. Poor scratching quality of sliding bearings, poor black-metal contact, or cracks, chipping, peeling, etc. on the rolling surface of the rolling bearing will destroy the stability and uniformity of the oil film and cause the bearing to heat up.
() The sealing felt is too tight and generates heat.
() Bearings vibrate too much and bear impact loads, seriously affecting the stability of the lubricating oil film.
() Insufficient or interrupted bearing cooling water affects the dissipation of heat and causes the bearing temperature to rise.
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<: >The performance of the fan is within the highest efficiency range. It is divided into five characteristics according to the flow rate. The selection shall be based on the performance table. The performance of the qualified fan is at full pressure under the rated flow rate. The value does not exceed %. The performance selection table shows the performance under standard conditions, standard atmospheric pressure, relative temperature % air condition, and the fan installation method can be divided into vertical or horizontal.