RU64717U1 - GAS FLOW PRESSURE REGISTRATION NOZZLE - Google Patents

Abstract

The utility model relates to measuring equipment, namely, devices for measuring gas flow parameters, and more specifically, for a surge signaling sensor of a compressor of a gas turbine engine. The nozzles for the device for recording pressure in the gas stream are made in the form of a non-separable (solid) body, in which channels and their inlet sections are made by drilling, milling or etching. The axis of the input sections of the channels are directed across the longitudinal axis of the housing and are placed at an angle α from 0 ° to 90 ° to each other. Thus, tubes and loaded solder joints are excluded from the design, which significantly increases the strength, reliability and durability of the device, as well as expanding the range of operating temperatures and pressures. Ease of connection to any measuring device is ensured by means of nozzles fixed to the body.

Description

The utility model relates to measuring equipment, namely, devices for measuring gas flow parameters, and more specifically, for a surge signaling sensor of a compressor of a gas turbine engine.

A device is known made of two tubes, each of which is curved in the form of the letter "G". The tubes are welded together in the form of the letter "T", (see N.F. Poshekhonov "Instruments for measuring pressure, temperature and direction of flow in compressors." Moscow: OBORONGIZ, 1962. Pages 47, 48, Fig.31).

The disadvantages of this design include:

- the presence of supporting soldered joints, which leads to restrictions on temperature and pressure;

- the difficulty of ensuring alignment of the input sections of the tubes during the soldering process;

- the possibility of damage to the inlet sections of the tubes when installing the device in the flow part;

- the possibility of destruction of soldered joints and the tubes themselves in operation due to vibration;

- the difficulty of ensuring the tightness of soldered joints during manufacture (the possibility of melting thin-walled tubes when brazing with high-temperature solder) and connecting to measuring instruments (the possibility of breaking soldered joints, twisting and “kinks” of the tubes);

- a large number of small parts, which greatly complicates the assembly of the device.

The objective of the utility model is to increase the structural strength.

An additional task is to facilitate the installation of the device.

This problem is solved by the fact that in the known nozzle for a sensor for recording pressure in a gas stream containing two channels, the input

sections of which are directed in different directions, according to the invention, both channels and their inlet sections are made in a single housing, and the longitudinal axis of the inlet sections of the channels are rotated relative to each other at an angle α from 0 ° to 90 °. The outlet portions of the nozzle channels are provided with fittings fixed to the nozzle body.

Thus, tubes and loaded solder joints are excluded from the design, which significantly increases the strength, reliability and durability of the device, and also extends the range of operating temperatures and pressures.

The one-piece housing allows you to expand the restrictions on temperature and pressure, as well as avoiding vibration and increasing reliability.

Fittings are installed at the outlet sections of the tubular channels, which makes it easy to connect measuring devices to the receiving devices.

Figure 1 shows a longitudinal section of a device;

figure 2 shows a cross section of the input sections of the channels with the option when the input holes are directed in opposite directions.

The nozzles for the pressure recording sensor contain a non-separable case 1 with a cover 2, in which two tubular channels 3 and 4 are made by drilling, milling or etching. The longitudinal axis of the inlet sections 5 and 6 of channels 3 and 4 are placed at an angle α from 0 ° to 90 ° to each other. The output sections 7 and 8 of channels 3 and 4 are equipped with fittings 9 and 10 soldered into the cover 2 of the housing 1. The fittings 9 and 10 are fixed to the cover 2 by welding in a protective gas environment. Tightness is ensured by soldering at the junction of the fittings with the body (places And).

The principle of operation of the utility model:

The device is installed in the engine’s flow path so that the inlet 5 is positioned towards the flow to measure the pressure of the incoming flow, and the inlet 6 of the channel 4 is located in the same plane at an angle α from 0 ° to 90 ° to the axis of the hole 5

and measures the value of the pressure acting on it. Depending on the angle α through the inlet 6, a static or bottom pressure is measured. Gas entering the inlet is transmitted through tubular channels and outlet openings in the lid and, passing through the fittings, enters the processing device.

The advantages of this design are:

- expanding the range of operating temperatures and pressures, which is achieved by eliminating loaded soldered joints from the structure, soldering is used only for sealing. Elimination from the design of the tubes allows the use of a higher temperature solder;

- increased structural strength, which is achieved through the use of a single body and welded joints instead of soldered. Welded joints also ensure structural strength with a significant increase in operating temperature;

- increase the durability of the structure, which is achieved through the use of welded joints instead of soldered. The welded connection of the fittings to the cover eliminates the possibility of leakage during the connection of return pipelines. The welded connection of the housing with the cover ensures the preservation of the strength and tightness of the structure during repeated removal-installation of the device in the flow path. The welded connection of the housing with the cover using soldering only for sealing ensures the integrity, strength and tightness of the structure with short-term temperature drops above the working temperature of the solder;

- the exception of getting into the flow path of fragments of the device when it is damaged, which is ensured by the absence of connections on the part of the device protruding into the flow path;

- improving the manufacturability of manufacturing and installation of the structure: increasing the manufacturability of manufacturing is achieved by reducing the number of parts, the unambiguity of the assembly, reducing

the possibility of damage to parts of the device during its assembly and the possibility of ensuring alignment of the input sections of the tubes during machining. Improving the manufacturability of the installation is ensured by eliminating the possibility of violation of the geometry and tightness of the device when it is installed in the flow path and the connection of response pipelines;

- small dimensions of the device, which is achieved by placing the fittings on the cover with a small angle of inclination relative to the axis of the device.

Claims (2)

1. Nozzles for a device for recording pressure in a gas stream, comprising two channels, the inlet portions of which are directed in different directions, characterized in that both channels and their inlet portions are made in a single housing, and the longitudinal axis of the inlet portions of the channels are angled relative to each other α from 0 ° to 90 °. 2. Nozzles according to claim 1, characterized in that the output portions of the channels of the nozzle are equipped with fittings fixed to the nozzle body.