CN217385545U

CN217385545U - Magnetoelectric speed sensor for measuring rotating speed of turbine cooler

Info

Publication number: CN217385545U
Application number: CN202123270156.6U
Authority: CN
Inventors: 俞航天
Original assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Current assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-09-06
Anticipated expiration: 2031-12-23

Abstract

The utility model belongs to electromechanical control system field discloses a magnetoelectric tachometric transducer for measuring aircraft turbo cooler rotational speed, including magnet steel and tachometric transducer, wherein the magnet steel is installed on turbo cooler's rotation axis, and tachometric transducer establishes in rotation axis radial distance 20 to 50mm department. The utility model discloses for traditional magnetoelectric tachometric transducer scheme of testing the speed, its measuring object needn't be the tone wheel of magnetizer material, can prolong (20 ~ 50) mm with measuring object's distance. Because the measuring object rotates at a high speed, certain displacement is inevitably generated during high-speed rotation, and the safety and the reliability can be greatly improved by prolonging the measuring distance. Moreover, the frequency signal output by the magnetoelectric revolution speed transducer is more similar to a sine wave, the output waveform is better than that of the traditional revolution speed transducer, and the amplitude can also meet the requirement of upper computer collection.

Description

Magnetoelectric speed sensor for measuring rotating speed of turbine cooler

Technical Field

The utility model belongs to electromechanical control system field, concretely relates to magnetoelectric tachometric transducer for measuring aircraft turbine cooler rotational speed.

Background

The conventional magnetoelectric rotation speed sensor is shown in fig. 1, a rotation speed sensor and a voice wheel made of a magnetizer material form a magnetic flux loop with a gap, when the voice wheel rotates, the magnetic flux sensed by a sensor coil is changed due to the change of the gap (when the tooth top rotates to the end of the sensor, the gap is minimum, the magnetic flux sensed by the sensor coil is maximum, when the tooth bottom rotates to the end of the sensor, the gap is maximum, the magnetic flux sensed by the sensor coil is minimum), so that induced electromotive force is generated, the frequency of the induced electromotive force is equal to the change rate of the magnetic flux, namely, the frequency is in direct proportion to the product of the rotation speed of the voice wheel and the tooth number of the voice wheel, and the sensor measures the rotation speed of the voice wheel according to the principle. The principle formula is as follows: n is 60f/Zi, where n is the rotation speed of the tone wheel, Z is the number of the tone wheel teeth, i is the transmission ratio of the tone wheel, and f is the frequency of the output voltage of the sensor.

In a conventional magnetoelectric tachometric transducer, magnetic steel is arranged in the tachometric transducer, and the structure of the magnetoelectric tachometric transducer is shown in fig. 2 and is mainly used for measuring the rotating speed of a tone wheel. The clearance between the tooth top of the sound wheel and the rotating speed sensor is only (1-2) mm. Due to the special structural requirements of the airplane turbine cooler, when the turbine cooler works, the impeller rotates at a high speed (the highest rotating speed is 140000r/min), and if the rotating speed sensor is too close to the impeller, the impeller is easily damaged, the turbine cooler is easy to break down, and certain dangerousness is realized. Therefore, there is a need for a new type of speed sensor for measuring the speed of rotation of an aircraft turbo-cooler.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: since the turbo cooler of an aircraft is a core component of an aircraft loop control cooling system, the performance of flight missions is directly influenced, and a rotating speed sensor is used for monitoring the working state of the turbo cooler. The utility model aims at providing a magnetoelectric tachometric transducer for measuring aircraft turbine cooler rotational speed.

The technical scheme of the utility model:

a magnetoelectric revolution speed transducer for measuring the revolution speed of a turbine cooler of an airplane comprises magnetic steel and a revolution speed transducer, wherein the magnetic steel is arranged on a rotating shaft of the turbine cooler, and the revolution speed transducer is arranged at the radial distance of 20-50 mm from the rotating shaft.

Further, speed sensor includes iron core subassembly and lead-out wire subassembly, and the iron core subassembly is established in the casing to keep the rigidity through the casing, the iron core subassembly passes through the lead-out wire subassembly and goes out magnetic field variation information transmission.

Furthermore, the iron core component is a structure formed by winding an iron core and a coil, and the coil is connected with the lead-out wire component.

Furthermore, the outgoing line assembly comprises a wiring printed board, an insulating gasket and a cable, the coil is connected with the wiring printed board, and the other end of the wiring printed board extends out of the shell through the cable to be connected with an external plug; the insulating gasket is arranged at the opening of the shell.

Further, the cable is protected by a rubber pad wrap and spaced from a cover at the opening of the housing.

Furthermore, the iron core assembly is transversely arranged at the radial extending position of the magnetic steel, the shell of the rotating speed sensor is transversely arranged, and the opening of the shell faces to the outer diameter direction of the rotating shaft.

The utility model has the advantages that:

the utility model discloses for traditional magnetoelectric tachometric transducer scheme of testing the speed, its measurement object need not be the tone wheel of magnetizer material, can prolong (20 ~ 50) mm with measurement object's distance. Because the measuring object rotates at a high speed, certain displacement is inevitably generated during high-speed rotation, and the safety and the reliability can be greatly improved by prolonging the measuring distance. Moreover, the frequency signal output by the magnetoelectric revolution speed transducer is more similar to a sine wave, the output waveform is better than that of the traditional revolution speed transducer, and the amplitude can also meet the requirement of upper computer collection.

Description of the drawings:

FIG. 1 is a schematic representation of a conventional magnetoelectric tachometer sensor arrangement;

fig. 2 is a structural view showing a conventional magnetoelectric rotation speed sensor;

FIG. 3 is a schematic view showing the installation of the present invention;

FIG. 4 is a schematic diagram illustrating the present invention;

FIG. 5 is a view showing the structure of the present invention;

FIG. 6 is a waveform diagram illustrating the electromagnetic simulation output of the present invention;

the cooling structure comprises a shell, a cover, a 3 insulating gasket, a 4 wiring printed board, a 5 cable, a 6 tail accessory, a 7 plug, a 8 rubber pad, a 9 iron core component, a 10 turbo cooler shell, a 11 turbo cooler nut, a 12 rotating shaft, a 13 rotating speed sensor and a 14 turbo cooler impeller.

Detailed Description

This section is an embodiment of the present invention for explaining and explaining the technical solution of the present invention.

A magnetoelectric revolution speed transducer for measuring the revolution speed of a turbine cooler of an airplane comprises magnetic steel and a revolution speed transducer, wherein the magnetic steel is arranged on a rotating shaft 12 of the turbine cooler, and the revolution speed transducer 13 is arranged at the radial distance of 20-50 mm from the rotating shaft.

Revolution speed sensor 13 includes iron core subassembly 9 and lead-out wire subassembly, and iron core subassembly 9 establishes in casing 1 to keep the rigidity through casing 1, iron core subassembly 9 goes out magnetic field change information transmission through the lead-out wire subassembly.

The iron core assembly 9 is a structure formed by winding an iron core and a coil, and the coil is connected with the lead-out wire assembly.

The outgoing line assembly comprises a wiring printed board 4, an insulating gasket 3 and a cable 5, the coil is connected with the wiring printed board 4, and the other end of the wiring printed board 4 extends out of the shell 1 through the cable 5 to be connected with an external plug 7; an insulating gasket 3 is provided at the opening of the housing 1.

The cable 5 is protected by a rubber pad 8 and spaced from the cover 2 at the opening of the housing 1.

The iron core assembly 9 is transversely arranged at the radial extending position of the magnetic steel, the shell 1 of the revolution speed transducer 13 is transversely arranged, and the opening of the shell 1 faces the outer diameter direction of the rotating shaft.

The following will further explain the embodiments of the present invention with reference to the attached drawings.

The conventional magnetoelectric tachometric transducer is mainly used for measuring the rotating speed of a tone wheel, and the magnetic steel is arranged in the tachometric transducer, the principle of the magnetoelectric tachometric transducer is shown in figure 1, and the structure of the magnetoelectric tachometric transducer is shown in figure 2. The clearance between the tooth top of the sound wheel and the rotating speed sensor is only (1-2) mm. When the speed measuring component rotates at a high speed, certain displacement is inevitably generated, and the clearance of (1-2) mm is not enough to ensure the safety distance when the rotating speed is measured, so that the contact is easily generated due to the displacement of the speed measuring component, the product failure is caused, and certain danger is generated.

The utility model provides a magnetoelectric tachometric transducer for measuring turbo cooler rotational speed, its installation schematic diagram is shown in FIG. 3, and its working principle diagram is shown in FIG. 5. A pair of strong magnetic permanent magnet magnetic steels are mounted on a rotor of the turbine cooler to generate a rotating magnetic field, a magnetic conduction mechanism is arranged in a volute of the turbine cooler to efficiently transfer the magnetic field, a coil in the magnetoelectric speed sensor cuts the rotating magnetic field to generate induced electromotive force, and the frequency of the induced electromotive force is equal to the rotating speed frequency of the turbine cooler.

Because set up magnetic conduction mechanism in the spiral case of turbine cooler, consequently, the distance between magnetoelectric tachometric transducer and the magnet steel can prolong (20 ~ 50) mm, this has just guaranteed even because turbine cooler during operation, the high-speed rotation of turbine shaft has produced certain displacement, also can not lead to magnet steel and magnetoelectric tachometric transducer's contact, thereby guaranteed that turbine cooler and tachometric transducer's during operation do not influence each other, very big improvement turbine cooler and tachometric transducer's reliability and security.

The utility model discloses a structure is as shown in fig. 5, forms iron core subassembly with the enameled wire coiling on magnetic materials's iron core, with the embedment of iron core subassembly inside the casing, the cable of iron core subassembly forms the cable again after consolidating through switching printing board and carries out signal output through the plug, and rethread laser welded's mode welds lid and casing. Through the utility model discloses the rotatory magnetic field of inside iron core subassembly cutting produces induced electromotive force, owing to be a pair of strong magnetism permanent magnet steel of symmetry installation on the turbine cooler, consequently the utility model discloses the frequency that produces induced electromotive force equals the rotational speed frequency of turbine cooler.

The utility model discloses an electromagnetism emulation result is as shown in figure 6, and at turbo cooler during operation, the magnet steel produces rotatory magnetic field, the utility model discloses inside iron core subassembly cutting rotating magnetic field produces induced electromotive force, and this induced electromotive force is similar to sine wave signal, and frequency equals turbo cooler's rotational speed frequency, and the amplitude is relevant with turbo cooler's rotational speed, the magnetic field characteristic of magnet steel, the number of turns of iron core subassembly coil and the distance between the magnet steel. The utility model discloses to the accurate measurement of rotational speed when can satisfying more than turbine cooler 10000r/min, the amplitude of exporting approximate sine wave frequency signal is not less than 200mV, satisfies the demand of upper computer rotational speed sampling.

Claims

1. A magnetoelectric revolution speed transducer used for measuring the revolution speed of the turbo cooler of the plane, characterized by, including magnet steel and revolution speed transducer, wherein the magnet steel is installed on rotating shaft (12) of the turbo cooler, the revolution speed transducer (13) is set up in the radial distance of rotating shaft 20 to 50 mm; the rotating speed sensor (13) comprises an iron core assembly (9) and an outgoing line assembly, the iron core assembly (9) is arranged in the shell (1) and is kept fixed in position through the shell (1), and the iron core assembly (9) transmits magnetic field change information through the outgoing line assembly; the iron core component (9) is a structure formed by winding an iron core and a coil, and the coil is connected with the lead-out wire component; the outgoing line assembly comprises a wiring printed board (4), an insulating gasket (3) and a cable (5), the coil is connected with the wiring printed board (4), and the other end of the wiring printed board (4) extends out of the shell (1) through the cable (5) to be connected with an external plug (7); the insulating gasket (3) is arranged at the opening of the shell (1).

2. A magnetoelectric rotation speed sensor for measuring the rotation speed of an aircraft turbine cooler according to claim 1, characterised in that the cable (5) is protected by a rubber mat (8) covering and spaced from the cover (2) at the opening of the housing (1).

3. A magnetoelectric tachogenerator for measuring the speed of rotation of an aircraft turbo cooler according to claim 2 in which the core assembly (9) is laterally positioned in the radially extended position of the magnet steel and the housing (1) of the tachogenerator (13) is laterally positioned with the opening of the housing (1) facing radially outward of the axis of rotation.