Normal-pressure spraying test table

Abstract

The invention discloses a normal-pressure spraying test table. The normal-pressure spraying test table is composed of a nozzle adjusting table, a test bed frame, a collecting table, a ball screw sliding table and an air extraction device from top to bottom in sequence; the nozzle adjusting table is fixed on the side edge of the test bed frame; the collecting table is embedded into the test bed frame, and a lead screw sliding block is arranged at the bottom of the collecting table and is connected with the ball screw sliding table; and the air extraction device is arranged below the collectingtable. According to the normal-pressure spraying test table, multidirectional movement of a nozzle in three-dimensional space can be realized, the test table is applicable to detection of different spraying injectors, and the automatic control of the spraying amount and the spraying position is realized; meanwhile, the overall structure is optimized, the splashing of liquid drops is reduced to themaximum, the liquid drop measuring precision is improved, and the experiment efficiency is improved; and in addition, the normal-pressure spraying test table is simple in structure, low in cost, convenient to install and convenient in part replacement and maintenance.

Description

technical field [0001] The invention relates to a spray device, in particular to a normal pressure spray test bench. Background technique [0002] Spray devices are widely used in the fields of agriculture, industry, medicine and aerospace. In order to obtain and evaluate the performance of spray devices, it is necessary to build a spray test bench to measure the macroscopic and microscopic characteristics of the spray by means of contact and non-contact measurement methods. , while the macroscopic parameters of the nozzle spray characteristics mainly include the atomization cone angle, the jet penetration length, the distance of liquid film breakage, and the distribution of droplets in the spray field, and the microscopic characteristic parameters include droplet size, position in the flow field, droplet Velocity, temperature, particle size distribution in the flow field. With the diversification of measurement methods and nozzle types, higher requirements are bound to be ...

AI Technical Summary

Problems solved by technology

At present, the problems existing in the test bench are mainly concentrated in two aspects: (1) the nozzle mechanism of the test bench does not have three-dimensional movement capability, and cannot be applied to the measurement of multiple measurement planes and nozzles with different configurations; (2) the droplet in the test bench is not considered Scattering phenomenon, there is no effective treatment of the droplets downstream of the nozzle, that is, the droplets at the collection platform. On the one hand, some droplets enter the measurement area for the second time, and on the other hand, the dispersion phenomenon occurs in the measurement area, especially in the measurement of large flow nozzles. Affect the accuracy of optical measurement, which will bring deviations to the measurement. For example, the spray test bench developed by Dr. Liu Juan of the National Did not take into account the droplet splashing and rebounding during the measurement, which will inevitably bring errors to the measurement (Liu Juan. Experimental and simulation research on the process of rotating cone liquid film breakup [D]. Changsha: National University of Defense Technology, 2012.)

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