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Device and method for preparing ice crystals in normal-temperature environment

An ice crystal and environment technology, used in the manufacture of ice, measurement devices, and engine testing, can solve the problems of high cost, single shape and particle size of ice crystals, and difficulty in simulating meteorological conditions, and achieve the effect of various particle sizes and cost savings.

Pending Publication Date: 2022-04-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned technical problems, the present invention provides a device and method for preparing ice crystals at normal temperature, so as to solve the difficulties in simulating meteorological conditions, high cost, single shape and particle size of ice crystals, and different diameters of obtained ice crystals in existing ice crystal preparation methods. ease of control

Method used

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  • Device and method for preparing ice crystals in normal-temperature environment
  • Device and method for preparing ice crystals in normal-temperature environment
  • Device and method for preparing ice crystals in normal-temperature environment

Examples

Experimental program
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Embodiment 1

[0034] This embodiment discloses a device for preparing ice crystals under normal temperature environment, such as figure 1 and figure 2 As shown, the device includes a grinding chamber 1 , a grinding disc 2 , a rotating shaft 3 , a motor 4 , an ice blowing pipeline 5 , a fan 6 , a thermometer and a support table 9 .

[0035] The grinding chamber 1 is provided with an ice loading opening 101, an ice dropping opening 102 and solid CO 2 air inlet 103 . The ice loading opening 101 is located at the top of the grinding chamber 1 . The ice drop opening 102 is arranged at the bottom of the grinding chamber 1, and the ice drop opening 102 is connected with the ice blowing pipeline 5, and the fan 6 is arranged at the end of the ice blowing pipeline 5 for blowing out the ice crystals falling into the ice blowing pipeline 5. The ice-blowing pipeline 5 is a three-way transparent PVC hard pipe.

[0036] Solid CO 2 The air inlet 103 is used to feed solid CO into the grinding chamber ...

Embodiment 2

[0044]This embodiment discloses a method for preparing ice crystals under normal temperature environment, which is prepared by using the device for preparing ice crystals under normal temperature environment described in Example 1. The specific preparation method includes:

[0045] Step 1, start the motor 4 and the fan 6 to run, the grinding disc 2 starts to rotate, and the rotating speed of the grinding disc 2 is 1400 rpm.

[0046] Adjust the distance between two adjacent grinding discs 2 according to the required ice crystal size. In this embodiment, the adjustment button 8 on the grinding chamber 1 can realize rapid adjustment. In this embodiment, the distance between the two grinding discs 2 is very small. The teeth on the two grinding discs 2 can touch each other.

[0047] Step 2, open the CO 2 The cylinder valve feeds CO into the grinding chamber 1 2 At the same time, use a thermometer to detect the temperature in the grinding chamber 1. When the temperature reaches -2...

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Abstract

The invention discloses a device and a method for preparing ice crystals in a normal-temperature environment. The device comprises a grinding chamber, a grinding disc, a rotating shaft, a motor, an ice blowing pipeline, a fan and a thermodetector for measuring the temperature in the grinding chamber, the at least two grinding discs are vertically arranged in the grinding chamber in parallel; the motor is connected with the grinding discs through a rotating shaft, so that two adjacent grinding discs rotate relatively; the grinding chamber is provided with an ice loading port for loading ice blocks, an ice falling port and a solid CO2 inlet, the ice falling port is connected with the ice blowing pipeline, and the fan is arranged at the tail end of the ice blowing pipeline. The ice crystals are prepared in a grinding mode in a normal-temperature environment, heat generated by ice block grinding is taken away through CO2 solid sublimation, the temperature in the grinding chamber is controlled to be-20 DEG C to-40 DEG C, and the ice crystals can be prepared, so that the cost is saved; and the ice crystal has various shapes and particle sizes, and is more in line with the actual situation.

Description

technical field [0001] The invention belongs to the technical field of aero-engine icing, and in particular relates to a device and method for preparing ice crystals in a normal temperature environment. Background technique [0002] There are ice crystals in the clouds with strong convective characteristics above the altitude of 6700m. In the area containing ice crystals, the ice crystal content can reach 9g / m 3 , with an average particle size below 200 μm. Compared with traditional supercooled water droplets, ice crystals have a higher content and a larger particle size, which can easily cause the low-pressure compressor of the engine or even the first few stages of the high-pressure compressor, sensors and other hot surfaces to freeze, which brings huge hidden dangers to flight safety. Therefore, in 2015, the FAA officially issued Amendment No. 33-34, which proposed airworthiness requirements under ice crystal meteorological conditions. At present, my country is also vig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25C5/04G01M15/00
CPCF25C5/043G01M15/00
Inventor 张丽芬余邦拓赵建辉胡剑平吕亚国刘振侠刘振刚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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