JPH0686043U - Yaw meter for pressure measurement - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a yaw meter for pressure measurement, which is capable of performing highly accurate pressure measurement and preventing damage even when used at high temperatures. A pressure transducer (4) is arranged so as to face three or more fluid intakes (12) provided on the holder (2) along the same plane and with different axial directions,
By measuring the fluid pressure introduced from the fluid intake with a pressure transducer and comparing their outputs,
The pressure and direction of the fluid to be measured are measured. A cooling water circulation path (15) having a forward path (15a) and a return path (15b) is formed in the holder, and a cooling water supply system (S) is connected to the cooling water circulation path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressure measuring yaw meter capable of measuring the pressure and direction of a fluid.

[0002]

[Prior art]

 For example, there is a three-hole yaw meter as a measuring instrument used when measuring the pressure and direction of airflow between blades in a multistage axial fan compressor of a jet engine. This three-hole yaw meter is capable of measuring the direction and pressure of unsteady pressure fluid, and has three fluid intake ports provided on the holder along the same plane and with different axial directions. A pressure transducer is attached to the holder so that the pressure of the fluid to be measured and the direction of the fluid to be measured are compared by measuring the fluid pressure introduced from the fluid inlet with the pressure transducer. Can be measured.

[0003]

[Problems to be solved by the device]

 By the way, in this type of conventional yaw meter for pressure measurement, the usable temperature range is limited to some extent due to the use of the pressure transducer. There was a risk that high measurement could not be performed or in extreme cases, it might be damaged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yaw meter for pressure measurement capable of performing highly accurate pressure measurement even under high temperature conditions and preventing damage. It is a thing.

[0005]

[Means for Solving the Problems]

 According to the present invention, in order to achieve the above object, pressure transducers are arranged so as to face three or more fluid intake ports provided in the holder along the same plane and in different axial directions. By measuring the fluid pressure introduced from the inlet with these pressure transducers and comparing the outputs from these pressure transducers, the yaw meter for pressure measurement that measures the pressure and direction of the fluid to be measured is A cooling water circulation path having an outward path and a return path is formed in the holder, and a cooling water supply system is connected to the cooling water circulation path.

[0006]

[Action]

 Since the cooling water is supplied from the cooling water supply system to the cooling water circulation path, the holder itself is cooled, and it is possible to prevent the pressure transducer from becoming hot even if used under high temperature conditions. . As a result, it becomes possible to use a yaw meter for pressure measurement under high temperature conditions.

[0007]

【Example】

 Hereinafter, a yaw meter for pressure measurement of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 is a body, and the body 1 is composed of a box portion 1a and a tubular portion 1b extending downward from the bottom of the box portion 1a. As shown in FIG. 3, a holder 2 is attached to the tip of the cylindrical portion 1b by rivets 3 and a pressure transducer 4 is inserted in the holder 2.

A wire 6 extending from the pressure transducer 4 and a tube 7 for cooling the holder 2 are passed through the cylindrical portion 1b. The wiring 6 is electrically connected to the connection terminal 9 attached to the plate 8 bolted to the upper end of the box portion 1a after penetrating the box portion 1a, and the tube 7 is inserted into the It is connected to an adapter 10 attached to the port 8. A wiring extending from a controller (not shown) is connected to the connection terminal 9, and a cooling water supply system for cooling the holder 2 is connected to the adapter 10.

As shown in FIG. 5, the holder 2 includes a holder main body 2 a into which three pressure transducers 4 are inserted and a fixing portion 2 b for attaching the holder 2 itself to the tubular portion 1 b of the body 1. The holder 2 is attached to the body 1 by fitting the fixing portion 2b into the U-shaped section 1c extending downward from the cylindrical portion 1b and fixing the fixing portion 2b via the rivet 3. The pressure transducer 4 can be replaced as appropriate by removing the rivet 3 and pulling out the holder 2 together with the tube 7.

The holder main body 2a is formed in a substantially isosceles triangular cross section, and three fluid intakes 12 are provided in the lower portion thereof along the transverse direction of the holder main body 2a and in the axial direction. It is provided differently. Further, the holder body 2a is provided with three through holes 13 along its axis, the lower end of which is communicated with the fluid intake port 12, into which the pressure transducer 4 is inserted and set.

A cooling water circulation path 15 is formed in the holder 2. The cooling water circulation passage 15 is provided between the holder main body 2a and the fixed portion 2b in a crotch manner, and the one formed along the axial direction at substantially the center of the holder main body 2a is the outward passage 15a and the fixed portion 2b is provided with a shaft. The return path 15b is formed along the line direction. The upper ends of the outward path 15a and the return path 15b are connected to the tube 7, and the lower ends of the outward path 15a and the return path 15b are communicated with each other via a communication part provided in the bottom member 16 of the hobolder 2. The bottom member 16 is attached to the holder 2 by a pin 18 and brazing.

Further, as shown in FIG. 4, a thermal contact 19 of a thermocouple is fixed to the holder body 2 a directly on the upper surface of the holder 2 with an adhesive, and a wire 20 extending from the thermocouple 19 is a cylinder of the body 1. It is connected to the plug 21 by inserting the portion 1b and further penetrating the plate 8. Then, the temperature of the holder 2 is measured in this manner, and the temperature is simulated as the temperature of the pressure transducer 4 to correct the measurement value of the pressure transducer 4.

According to the yaw meter for pressure measurement having the above structure, however, the fluid is introduced into the three fluid intakes 12 formed in the holder 2, and the fluid pressure is measured by the pressure transducer 4. By comparing the respective outputs of the pressure transducers 4, it is possible to measure the direction and pressure of the pressure fluid, which is a measurement target and fluctuates in an unsteady manner.

Here, when the pressure fluid to be measured has a high temperature, it is concerned that the pressure transducer 4 is exposed to a high temperature, resulting in a large measurement error or damage. Cooling water is supplied from the cooling water supply system S to cool the pressure transducer 4 via the holder 2. Therefore, even if the pressure transducer 4 is used under high temperature conditions, the pressure transducer 4 is prevented from reaching a high temperature. It can be prevented and the measurement error will not increase or be damaged.

Further, the cooling water for cooling the holder 2 is not discharged as it is to the outside but is of a circulation type, so that it does not affect the flow of the fluid to be measured.

Further, since the holder 2 is only fitted into the U-shaped section 1c of the body 1 and is fixed by the rivet, the pressure transducer 4 can be easily attached to the holder 2 by removing the rivet 3. It can be removed, which is advantageous during maintenance and when replacing the pressure transducer 4.

Further, in the embodiment, since the temperature of the holder 2 itself is measured by the thermocouple and the measurement value of the pressure transducer 4 is corrected based on the temperature, the measurement accuracy can be further improved.

The structure of the yaw meter for pressure measurement of the present invention is not limited to the above-mentioned embodiment, and the concrete components such as the shape, material, size and construction procedure of each member are not limited to the embodiment. It can be changed as appropriate.

For example, in the above-described embodiment, the holder 2 is provided with the total of two passages, that is, the outward passage 15a and the return passage 15b as the cooling water circulation passage 15. However, the present invention is not limited to this, and the forward passage or the return passage is not limited to this. The header may be provided and a plurality of outward paths 15a or 15b may be formed to extend therefrom.

[0020]

[Effect of device]

 As described above, according to the present invention, since the cooling water is supplied to the holder from the cooling water supply system, the pressure transducer is cooled through the holder, and it is assumed that the pressure transducer is used under high temperature conditions. However, the pressure transducer can be prevented from getting hot and the measurement error will not be increased or damaged. Further, the cooling water for cooling the holder is not discharged as it is to the outside, but is of a circulation type, so that it does not disturb the flow of the fluid to be measured. Moreover, the size of the measuring instrument can be made as small as possible, so that it has excellent effects such as not disturbing the flow of fluid.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a yaw meter for pressure measurement showing an embodiment of the present invention.

FIG. 2 is a plan view of the pressure measuring yaw meter.

FIG. 3 is a detailed sectional view of a lower portion of a pressure measuring yaw meter.

FIG. 4 is an enlarged cross-sectional view of an upper portion of a holder.

5 is a cross-sectional view taken along line XX of FIG.

FIG. 6 is a cross-sectional view showing a part of a cooling water circulation path.

[Explanation of symbols]

 1 Body 1a Box part 1b Cylinder part 1c U-shaped part 2 Holder 2a Holder body 2b Fixed part 3 Rivet 4 Pressure transducer 7 Tube 12 Fluid intake port 15 Coolant water circulation path 15a Outgoing path 15b Return path

Claims (1)

[Scope of utility model registration request] 1. A pressure transducer is arranged on the holder so as to face three or more fluid inlets provided along the same plane and with different axial directions, and the fluid pressures introduced from the fluid inlets are provided to the pressure transducers. In a pressure measurement yawometer that measures the pressure and direction of the fluid to be measured by measuring with a pressure transducer and comparing the outputs from these pressure transducers, a cooling water circulation path that includes a forward path and a return path in the holder is provided. A yaw meter for pressure measurement, which is formed and has a cooling water supply system connected to the cooling water circulation path.