1, the pump should be selected by the prototype pump blade blade drawings (wood model) and the model test blade line to compare the prototype blade to confirm the size and the corresponding size of the model blade geometry is similar.
2, pump station impeller blades after processing, supervision engineers should be processed to complete the detection of the blade line. Leaf front and back lines should be measured 4 to 5 isometric cylindrical section, the prototype blade and leaf wood pattern in the same corresponding coordinate point with the corresponding base surface distance measurement, the line tolerance should be ± 0.15% D (D For impeller diameter). Detection can be done using a combination of templates. Coordinates can also be used. When using the combination of template inspection, the blade rotation axis of the allowable adjustment of ± 0.2% D, the angle adjustment should not exceed ± 0.25o, but does not allow radial adjustment, and should be measured once.
3, with a model inspection of the blade line, the blade head inspection of the four sections, the template length of not less than 0.03D, allowable deviation of ± 0.05% D; blade tail check two sections, the front length of not less than 0.02D, Less than 0.04D, the tolerance is ± 0.05% D.
4, impeller outer diameter error shall not be greater than the design drawings.
5, the angle of the blade using oil pressure pump regulation, the impeller should be carried out hydraulic test, and in line with this specification, 3.2.3 provides; blade angle mechanical adjustment of the rigid rod pump, such as the wheel internal grease with rust, or from the Lubrication of the bearing may not be oil pressure test.
6, a hub on all the leaves of the installation angle should be consistent, the outer edge of the blade profile angle, the maximum deviation should be less than 0.25o ,. Hub should have a clear scale.
7, the pump impeller manufacturer should provide leaf material report and flaw detection report. If heat treated, a heat treatment report should also be provided.
8, the factory should be combined impeller and impeller shell, the spherical center of the same time, the measurement of the blade and the impeller profile gap; measurement contour plane to the impeller shell on the plane relative distance; should meet the technical requirements of the drawings.
The above content is based on the actual work of the students encountered problems from the order, for reference, if there are problems, timely communication, correction.
2, pump station impeller blades after processing, supervision engineers should be processed to complete the detection of the blade line. Leaf front and back lines should be measured 4 to 5 isometric cylindrical section, the prototype blade and leaf wood pattern in the same corresponding coordinate point with the corresponding base surface distance measurement, the line tolerance should be ± 0.15% D (D For impeller diameter). Detection can be done using a combination of templates. Coordinates can also be used. When using the combination of template inspection, the blade rotation axis of the allowable adjustment of ± 0.2% D, the angle adjustment should not exceed ± 0.25o, but does not allow radial adjustment, and should be measured once.
3, with a model inspection of the blade line, the blade head inspection of the four sections, the template length of not less than 0.03D, allowable deviation of ± 0.05% D; blade tail check two sections, the front length of not less than 0.02D, Less than 0.04D, the tolerance is ± 0.05% D.
4, impeller outer diameter error shall not be greater than the design drawings.
5, the angle of the blade using oil pressure pump regulation, the impeller should be carried out hydraulic test, and in line with this specification, 3.2.3 provides; blade angle mechanical adjustment of the rigid rod pump, such as the wheel internal grease with rust, or from the Lubrication of the bearing may not be oil pressure test.
6, a hub on all the leaves of the installation angle should be consistent, the outer edge of the blade profile angle, the maximum deviation should be less than 0.25o ,. Hub should have a clear scale.
7, the pump impeller manufacturer should provide leaf material report and flaw detection report. If heat treated, a heat treatment report should also be provided.
8, the factory should be combined impeller and impeller shell, the spherical center of the same time, the measurement of the blade and the impeller profile gap; measurement contour plane to the impeller shell on the plane relative distance; should meet the technical requirements of the drawings.
The above content is based on the actual work of the students encountered problems from the order, for reference, if there are problems, timely communication, correction.
Manufacturers recommend: Shenlong stainless steel fountain submersible pump
Keywords:Pump station, pump impeller manufacturing acceptance, detection methods
没有评论:
发表评论