Impeller and volute gap measuring device
A measuring device and impeller technology, applied in pump control, non-variable pumps, machines/engines, etc., can solve damage to the pump body, collision and friction between the pump volute and the impeller, and affect the hydraulic efficiency and volumetric efficiency of the pump, etc. problem, to achieve the effect of simple structure
Active Publication Date: 2019-08-20
中国航发控制系统研究所
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Problems solved by technology
An excessively large gap will cause the liquid after the work done by the impeller to return to the pump inlet, merge with the liquid from the inlet pipe and then enter the impeller, forming repeated work, affecting the hydraulic efficiency and volumetric efficiency of the pump; while too small a gap will cause the pump to The collision and friction between the volute and the impeller damage the pump body
Moreover, for the centrifugal pump as a whole, it is impossible to directly measure the gap between the impeller and the volute after the assembly is completed.
Method used
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[0013] The present invention will be further described below in conjunction with accompanying drawing:
[0014] Such as Figure 1-Figure 3 Shown: a device for measuring the gap between the impeller and the volute includes an impeller base 3, a volute top cone 4, an impeller top cone 5, a slotted hex head screw 6 and a bracket 7; the bracket 7, the volute top cone 4 and The top cone 5 of the impeller is connected by a slotted hex head screw 6 , and the lower end surface of the support 7 is close to the end surface of the impeller base 3 and connected with the impeller base 3 .
[0015] The top cone 4 of the volute and the top cone 5 of the impeller need to ensure that the taper and the shape and position tolerance of the cone surface are completely consistent with the taper of the volute and the impeller under test; The matching hole size of the base is processed according to the H7 / f9 tolerance zone.
[0016] When the present invention measures,
[0017] The tested volute 1...
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The invention discloses an impeller and volute gap measuring device, relates to direct measurement of impeller and volute gaps, and belongs to the technical field of engine measurement. The impeller and volute gap measuring device comprises an impeller base, a volute top cone, an impeller top cone, straight-line groove hexagonal head screws and a bracket; the bracket, the volute top cone and the impeller top cone are connected through the straight-line groove hexagonal head screws; the lower end surface of the bracket is tightly bonded on the end surface of the impeller base, and is connectedwith the impeller base; the measurement is started after placement of measured volutes and measured impellers; and measured delta values are gaps between the impellers and the volutes. The impeller and volute gap measuring device is simple, compact and reasonable in structure; and as a step-by-step indirect measuring method is adopted, mutual conversion of sizes can be directly measured through cooperation of measuring tools in the centrifugal pump assembly process to obtain gap values between the impellers and the volutes after assembly.
Description
technical field [0001] The invention relates to a device for measuring the gap between an impeller and a volute, which relates to direct measurement of the gap between the impeller and the volute, and belongs to the technical field of engine measurement. Background technique [0002] The existence of the gap between the impeller and the volute is the main reason for the leakage loss of the centrifugal pump. An excessively large gap will cause the liquid after the work done by the impeller to return to the pump inlet, merge with the liquid from the inlet pipe and then enter the impeller, forming repeated work, affecting the hydraulic efficiency and volumetric efficiency of the pump; while too small a gap will cause the pump to The collision and friction between the volute and the impeller damage the pump body. And for the centrifugal pump as a whole, after the assembly is completed, it is impossible to directly measure the size of the gap between the impeller and the volute....
Claims
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IPC IPC(8): F04D15/00
CPCF04D15/0088
Inventor 李昆柏文峰王子祥吴亮亮季春生申文博申通
Owner 中国航发控制系统研究所