SU1326869A1 - Method of quality check of heat pipe - Google Patents

Abstract

This invention relates to a technology for the manufacture of heat pipes (TT) and methods for testing them for operability. The purpose of the invention is to expand the functionality of the method. Heat is supplied to one of the sections of the CT 1 before reaching the stationary mode. Tepatipy TT I is measured at two points on opposite ends of the TT on opposite sides of the heat supply zone, while measurements are taken at different locations of the heat supply along the length of the TT. Characteristic graphs are obtained for the temperature difference, according to which, by comparing them with the graph for the reference pipe, the type of defect is determined: the presence of non-condensing gas in TT 1, excess heat transfer medium or wick gap 2. 1 hp f-ly, 10 ill. with (L

Description

The invention relates to heat engineering, in particular, to the technology of manufacturing heat pipes and methods for testing them for operability.

The purpose of the invention is to expand the functionality.

Fig. 1 schematically shows a device for implementing the method; in Fig „2 - a pipe with non-condensing gas with a lower position of the heat supply zone; on FIG. 3 - the same, with the upper position of the heat conduction zone; figure 4 - the change in temperature drop at the pipe with gas; on fig.Z - pipe with an excess of coolant; figure 6 - the change in temperature difference in the pipe with an excess of coolant; Fig, 7 pipe with a wick gap; 8 shows the temperature change at the pipe with a wick broken; FIG. 9 shows the tube; Fig, 10 - the change in temperature difference at the reference pipe.

The device contains a heat pipe 1 with a wick 2 on the inner surface and a heat source 3 mounted for movement along the pipe 1 by means of an actuator 4. The pipe 1 is provided at the ends with thermal converters 5 connected to a recording and recording device 6,

On the graphs, L T T - Tg., Where T, Tg are the temperatures of the lower and upper ends of the pipe, respectively), Q is the heat flux, L is the coordinate along the axis of the pipe. The curves a and S refer to cases where the gas is correspondingly heavier and lighter than the heat carrier steam. Figure 6 curves with the plot-

L

G1

Ha

zhz

correspond to the excess heat carrier nijj,, t, s (figure 5),

moreover, t .. -i in. t. ,,,, heat can

   (jf- L

, to be connected to the pipe and by the contactless method (for example, using an IR laser).

The method is carried out as follows.

Pipe 1 is heated at the lower end until it reaches a stationary mode, then the heat supply zone is moved upwards and characteristic charts are obtained for the temperature gradient. or rupture (plugging) wick 2, The method can also be applied for non-stationary heat supply.

Claims (2)

1. A method for controlling the quality of a heat pipe by supplying heat to one of its sections, measuring the temperature of the pipe at two points outside the heat supply zone, determining the difference in measured temperatures and comparing it with the result obtained on the reference pipe, characterized in that, in order to expand functionality, temperature measurement points are selected at opposite ends of the pipe on opposite sides of the heat supply zone, while measurements are made at different locations of the heat zone for the length of the pipe. 2. Method pop. 1, which differs from the fact that the heat supply zone in the process of temperature measurement is moved. Q Q AND fib 2 Fi.Z + lg xsG / Max Phage, tf L -4G Fi.b Sh Qi at g, I break LTT Phie. 7 Fie.9 fi9, B Compiled A, Lobanov Editor T. Lazorenko Tehred V. Kadar Proofreader T, Kolb Order 3268/34 Circulation 611 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035 ,, Moscow, Zh-35, Raushsk nab ,, d, 4/5 Production and printing company, Uzhgorod, st. Project, 4