The accuracy of the spindle component refers to the rotational accuracy after assembly and adjustment, which includes radial circular runout of the spindle, axial runout and the uniformity and smoothness of the spindle rotation. Factors affecting the rotational accuracy of spindle components are as follows. I. Factors affecting the radial runout of spindle components 1, the accuracy of the spindle itself. Such as the different axis of the spindle journal, taper and out of roundness. Spindle journal of different axes will directly cause the radial runout of the spindle, and spindle journal taper and out of roundness in the assembly will cause deformation of the inner raceway of the rolling bearing, destroying its accuracy. 2, the accuracy of the bearing itself. One of the most important is the bearing raceway surface of the out-of-roundness, roughness to...

In order to ensure the quality of the installation and improve the efficiency of the installation work, it is necessary to do a good job of all the preparatory work before installation. Familiarize yourself with the design drawings, information, manuals and other technical documents for the installation of the Roots fan. Including familiar with the installation drawings of the ventilator body, grasp the structural characteristics of the ventilator; familiar with the ventilation system drawings of the ventilator, understand the ventilator in the system working conditions; familiar with the foundation acceptance specification of the ventilator and its construction, according to the design drawings to check on the specification of the ventilator, the form of the rotating direction of the blades or rotor, the power requirements of the matching prime mover, the center of the ground bolts holes, the inlet and outlet flange aperture and orientation and center distance, the center elevation of the main shaft, and so on whether it is a good idea. Bearing and center distance, the center elevation of the main shaft, etc. are in accordance with...

Fan manufacturers have compiled and printed the factory's fan product samples and catalogs. In the fan product samples and catalogs, ventilators are usually according to the series, machine number listed in a variety of rotational speed under the selection of performance table, the table of performance parameter values is the fan's highest efficiency point of 90% range of values, and to take the value of 6 to 8 performance points for selection. Roots blower is usually listed as a single species of single machine number in a certain speed under the highest efficiency point of the performance parameter values. The use of fan performance table selection fan is very convenient. However, attention must be paid to checking the actual working conditions of the wind volume, wind pressure is consistent with the performance of the table in the air intake state. If in line with the side can directly check the performance table selection; otherwise, it is necessary to pass the relevant formula...

Correct selection of ventilators is an important step to ensure that the ventilation system is normal and economic. Principles of selection of ventilation fan: First, high applicability; second, strong reliability; third, good economy. High applicability refers to the use of the selected fan, structure, performance parameters are in line with the conditions and requirements of the use of working conditions. If there is no need for fan varieties and machine number, can not be indiscriminate, should be required to fan manufacturers in addition to the design. Strong reliability, means that the design and manufacturing quality of the selected fan is in full compliance with the relevant national technical standards. Fan operation is reliable, long service life. Economy is good, refers to the fan's high efficiency, low energy consumption, low noise, small size, occupy less space,...

Roots blowers usually use shaft end seals have three kinds of gland type, skeleton type and mechanical seal. 1 Gland type This is a simple structure, the more commonly used form of sealing, mostly used for conveying air. And the cylinder connected to the part of a total of four gland-type seal, in the gland packing box into several rings of asbestos oil packing, in order to reduce the axial length, the design of the seal are considered to be close to the bearing. During operation, the bolts around the gland can be tightened regularly to keep the gas from leaking. 2Skeleton type Skeleton seal is generally a skeleton rubber oil seal, each set of seals consists of two or three J-shaped skeleton rubber oil seals, two of which are mounted back-to-back on the inside in contact with the conveying medium, the other side is mounted on the outside, ...

Roots fan is a high-speed machine, so it will produce vibration, but also because of its internal air pulsation effect, but also increase the vibration of the Roots fan, so the installation of the Roots fan needs to be fixed on the ground. According to the different fan models, in the ground according to the fan size in the corresponding position to dig out a suitable square pit, and buried in the ground bolts, and then through the bolts, nuts connected to the fan, and finally in the square pit filled with cement concrete, and so the concrete is fixed, and then tighten the nut, is the base of the fan and the concrete is firmly connected to together, so that you can reduce the vibration of the Roots fan in the operation of the displacement to improve the operational safety of the equipment, and also the air pulsation effect, also increase the vibration of the Roots fan needs to be fixed on the ground. The operation safety of the equipment, and because of the reduction of...