Method for eliminating welding stress of stationary members of blower fan
A technology of welding stress and static parts, which is applied in the field of eliminating welding stress of fan static parts, can solve problems such as deformation, affecting fan safety performance, delaying cracks, etc., achieves low operating costs, improves safety and reliability, and reduces welding cracks.
Inactive Publication Date: 2013-05-15
NANTONG DART POLLRICH FAN
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Problems solved by technology
[0002] In the field of fan engineering technology, generally only rotating parts such as impellers or blower and compressor casings are subjected to post-welding stress relief heat treatment, while static fan casings
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Embodiment Construction
[0011] The present invention will be further described below in conjunction with specific embodiment:
[0012] A method for eliminating the welding stress of the stationary parts of the fan as described above includes the following steps:
[0013] (1) Select six points on the stationary parts of the fan as vibration points;
[0014] (2) Utilize the vibration of the magnetic head on the electromagnetic vibrator at each vibration point to induce resonance of the stationary part;
[0015] (3) When the vibration wave on the electromagnetic vibrator recorder changes from a double peak to a single peak, just stop the vibration.
[0016] The vibration direction of the electromagnetic vibrator is consistent with the direction of the weld seam when the stationary part is welded, and the stationary part of the fan includes a centrifugal fan casing and a bracket.
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The invention discloses a method for eliminating welding stress of stationary members of a blower fan. The method comprises steps of selecting multiple points on the stationary members of the blower fan as vibration points, inducing resonance of the stationary members by using vibration of magnetic resonance heads of an electromagnetic vibrator on the vibration points, and stopping vibration when vibration waves on a recorder of the electromagnetic vibrator changes from double peaks to a single peak. The method is low in operation cost, short in processing time, and free of environmental pollution, and can effectively eliminate the welding stress of the stationary members of the blower fan, reduce welding cracks, and improve safety and reliability of a long-term operation of the blower fan.
Description
technical field [0001] The invention relates to the technical field of fan engineering, in particular to a method for eliminating welding stress of a static part of a fan. Background technique [0002] In the field of fan engineering technology, generally only rotating parts such as impellers or blower and compressor casings are subjected to post-welding stress relief heat treatment, while static fan casings, brackets and other stationary parts of centrifugal fans are not subjected to stress relief measures after welding, resulting in After welding, it deforms and produces delayed cracks, which affects the safety performance of the fan. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for eliminating the welding stress of the stationary parts of the fan with low operating cost and rapid processing. [0004] The technical solution adopted in the present in...
Claims
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Inventor 杜娟
Owner NANTONG DART POLLRICH FAN