CN213902717U

CN213902717U - Diaphragm type transformer sensor

Info

Publication number: CN213902717U
Application number: CN202023161312.0U
Authority: CN
Inventors: 周康俊
Original assignee: Taiyuan Aero Instruments Co Ltd
Current assignee: Taiyuan Aero Instruments Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-06
Anticipated expiration: 2030-12-24

Abstract

The utility model belongs to transformer sensor field, concretely relates to diaphragm formula transformer sensor. The method comprises the following steps: the casing, upper end transformer subassembly, lower extreme transformer subassembly, armature subassembly, lower extreme armature, the end cover, the diaphragm, static pressure filler neck, full crimp nozzle, framework and base subassembly, wherein, the casing, a sealed space is constituteed to the end cover, static pressure filler neck, full crimp nozzle sets up respectively at the end cover, framework and base subassembly include framework and base, the framework is the tubular structure of fretwork, the base top sets up the diaphragm below and is connected with full crimp nozzle, lower extreme armature welding is on the diaphragm, upper end transformer subassembly and lower extreme transformer subassembly are fixed on the tubular lateral wall of framework in proper order, armature subassembly is fixed on the framework and is located upper end transformer subassembly top, the reverse series connection of the secondary coil of upper end transformer subassembly and lower extreme transformer subassembly. The reliability is improved.

Description

Diaphragm type transformer sensor

Technical Field

The utility model belongs to transformer sensor field, concretely relates to diaphragm formula transformer sensor.

Background

At present, most sensors matched with a pneumatic diaphragm capsule in electromechanical pneumatic sensors are potentiometer sensors. The potentiometer sensor is friction type measurement, after the sensor works for a long time, due to the sliding of the electric brush, scratches can be left on the working surface of the potentiometer, meanwhile, due to the fact that the electric brush is in a stressed state for a long time, the electric brush and the matched elastic sheet can be changed into plastic deformation through elastic deformation, the contact pressure of the working surface of the potentiometer can be correspondingly reduced, and the contact reliability is influenced.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: a diaphragm type transformer sensor is provided to improve reliability.

The technical scheme is as follows:

in a first aspect, a diaphragm type transformer sensor is provided, including: the casing, upper end transformer subassembly, lower extreme transformer subassembly, armature subassembly, lower extreme armature, the end cover, the diaphragm, static pressure filler neck, full crimp nozzle, framework and base subassembly, wherein, the casing, a sealed space is constituteed to the end cover, static pressure filler neck, full crimp nozzle sets up respectively at the end cover, framework and base subassembly include framework and base, the framework is the tubular structure of fretwork, the base top sets up the diaphragm below and is connected with full crimp nozzle, lower extreme armature welding is on the diaphragm, upper end transformer subassembly and lower extreme transformer subassembly are fixed on the tubular lateral wall of framework in proper order, armature subassembly is fixed on the framework and is located upper end transformer subassembly top, the reverse series connection of the secondary coil of upper end transformer subassembly and lower extreme transformer subassembly.

Further, still include: and the O-shaped sealing ring is arranged between the end cover and the shell.

Further, a plurality of gaskets are arranged at the connection positions of the upper end transformer assembly and the lower end transformer assembly and the machine frame.

Further, the armature component comprises a tripod and an upper armature, the tripod is fixed at the upper end of the machine frame, and the upper armature is welded below the tripod.

Further, the upper armature is spaced from the upper transformer assembly by a distance that produces an initial voltage value for the secondary coil of the upper transformer assembly.

Further, the maximum displacement of the diaphragm is the displacement that produces the maximum voltage value of the secondary coil of the lower transformer assembly.

Further, the initial position of the diaphragm is a position where an initial voltage value of the secondary coil of the lower transformer assembly is generated.

Has the advantages that:

compared with the traditional potentiometer sensor, the diaphragm type transformer sensor has the characteristics of long mechanical life, wide measurement range, high resolution, small volume, high reliability and the like.

Drawings

Fig. 1 is a schematic structural diagram of a diaphragm type transformer sensor according to the present invention;

fig. 2 is a magnetic circuit and an electric circuit schematic diagram of the armature assembly of the transformer.

Wherein, 1-shell; 2-a filter rectification circuit; a 3-NOR gate circuit; 4-a gasket; 5-an armature assembly; 6-upper end transformer assembly; 7-a screw; 8-a lower end transformer assembly; 9-lower armature; 10-a membrane; 11-a frame and base assembly; 12-O-ring seals; 13-end cap; 14-static pressure filler neck; 15-full crimp nozzle; 16-connector combination; 17 upper end armature.

Detailed Description

The diaphragm type transformer sensor is mainly characterized in that according to the working principle of a diaphragm, an armature, a transformer, a NOR gate circuit and a filter rectification circuit of sensitive parts, the components are effectively combined together through structural design, magnetic circuit design and circuit design to finish air pressure acquisition and corresponding direct-current voltage output. The design idea is one-time innovation of the air pressure sensor. Compared with other diaphragm type air pressure sensors, the sensor has the characteristics of no friction measurement, infinite mechanical life, infinite resolution, zero repeatability, input and output isolation, strong environmental adaptability and the like.

The main components comprise a shell 1, a filter rectification circuit 2, a NOR gate circuit 3, a gasket 4, an armature component 5, an upper end transformer component 6, a screw 7, a lower end transformer component 8, a lower end armature 9, a diaphragm 10, a machine frame and base component 11, an O-shaped sealing ring 12, an end cover 13, a static pressure pipe connecting port 14, a full pressure pipe connecting port 15 and a connector assembly 16.

The working principle is that a transformer sensor which senses dynamic pressure change is taken as an example, a static pressure pipe connecting mouth 14 is connected with a static pressure source, a full pressure pipe connecting mouth 15 is connected with a full pressure source, a diaphragm 10 senses the pressure difference change of the full pressure and the static pressure, namely, dynamic pressure, and generates displacement, so that a lower armature 9 is close to or far away from a lower transformer component 8, a NOR gate circuit 3 generates an excitation signal and is connected with primary coils of an upper transformer component 6 and a lower transformer component 8, an armature component 5 and the upper transformer component 6 form an upper magnetic circuit, the lower armature 9 and the lower transformer component 8 form a lower magnetic circuit, when the position of the lower armature 9 is changed, the magnetic resistance in the magnetic circuit is correspondingly changed, so that primary current and secondary voltage are changed, and a direct current voltage signal corresponding to the dynamic pressure is output through a filter rectification circuit 2.

The shell 1, the mechanism frame and base assembly 11, the end cover 13 and the O-shaped sealing ring 12 form a sealed space, the static pressure pipe connecting nozzle is connected with a static pressure source, and the full pressure pipe connecting nozzle is connected with a full pressure source.

Armature subassembly 5, lower extreme transformer subassembly 8 and upper end transformer subassembly 6 pass through the fix with screw on machine frame and base subassembly (11), and the installation department is through installation gasket 4, the adjustment clearance size, and armature subassembly 5 contains upper end armature, tripod, and the tripod is in the same place with upper end armature welding.

The lower armature 9, the diaphragm 10, the end cap 13, the frame and base assembly 11 and the full-pressure nozzle 15 are combined into an integral whole by welding as shown in fig. 1.

For convenience of analysis, the upper armature 17, the upper transformer assembly 6, the lower armature 9 and the lower transformer assembly 8 form a transformer armature assembly.

Because the iron core and the armature of the transformer component are made of super permalloy and cold-rolled silicon steel with high magnetic conductivity, the iron core and the armature of the transformer component have the capacity of concentrating magnetic flux inside the iron core and the armature of the transformer component, thereby forming a closed loop which comprises a magnetic medium, namely a magnetic circuit, and the armature 17 at the upper end of the transformer armature component and the transformer component 6 at the upper end of the transformer armature component form an independent magnetic circuit; the lower armature 9 is welded above the diaphragm 10 and forms another independent magnetic circuit with the lower transformer assembly 8. The reverse series connection of the secondary windings of the upper and

lower transformer assemblies

6, 8 is shown in figure 2.

The diaphragm 10 is made of an alloy 3J53 for elastic elements, and is welded with the bottom plate and the filler neck into a whole. The maximum stroke of the diaphragm is determined by the structural design of the diaphragm 10.

The diaphragm type transformer sensor is characterized in that:

a) a frictionless measurement, where there is typically no physical contact between the armature and the transformer;

b) infinite mechanical life, which is long because there is no friction and contact between the movable armature of the sensor and the transformer, and therefore no wear occurs;

c) infinite resolution, frictionless operation and its induction principle make it able to respond to the slightest movement of the armature;

d) zero repeatability, symmetrical sensor construction, zero returnable. The electric zero repeatability of the sensor is high and extremely stable;

e) input and output are isolated;

f) the environmental adaptability is strong, and the diaphragm type transformer sensor is one of a few sensors which can work in various severe environments;

through comparison, the diaphragm type transformer sensor is stable in performance and high in environmental adaptability.

Claims

1. A diaphragm-type transformer sensor, comprising: the high-voltage transformer comprises a shell (1), an upper end transformer component (6), a lower end transformer component (8), an armature component (5), a lower end armature (9), an end cover (13), a diaphragm (10), a static pressure pipe connecting nozzle (14), a full pressure pipe connecting nozzle (15), a mechanism frame and a base component (11), wherein the shell (1) and the end cover (13) form a sealed space, the static pressure pipe connecting nozzle (14) and the full pressure pipe connecting nozzle (15) are respectively arranged on the end cover (13), the mechanism frame and the base component (11) comprise a machine frame and a base, the mechanism frame is of a hollow cylindrical structure, the lower part of the diaphragm (10) arranged above the base is connected with the full pressure pipe connecting nozzle (15), the lower end armature (9) is welded on the diaphragm (10), the upper end transformer component (6) and the lower end transformer component (8) are sequentially fixed on the cylindrical side wall of the machine frame, the armature component (5) is fixed on the machine frame and positioned above the upper end transformer component (6), and secondary coils of the upper end transformer assembly (6) and the lower end transformer assembly (8) are reversely connected in series.

2. The sensor of claim 1, further comprising: the O-shaped sealing ring (12), the O-shaped sealing ring (12) is arranged between the end cover (13) and the shell (1).

3. Sensor according to claim 1, characterized in that the connection of the upper transformer assembly (6) and the lower transformer assembly (8) to the machine frame is provided with a plurality of spacers (4).

4. A sensor according to claim 1, wherein the armature assembly (5) comprises a spider fixed to the upper end of the frame and an upper armature welded to the underside of the spider.

5. A sensor according to claim 1, characterized in that the distance of the upper armature from the upper transformer assembly (6) is the distance that gives rise to the initial voltage value of the secondary winding of the upper transformer assembly (6).

6. Sensor according to claim 1, characterized in that the maximum displacement of the diaphragm (10) is the displacement that produces the maximum voltage value of the secondary winding of the lower transformer assembly (8).

7. Sensor according to claim 1, characterized in that the initial position of the membrane (10) is the position where the initial voltage value of the secondary winding of the lower transformer assembly (8) is generated.