CN103063177A - Sensitive element with high precision resistant to high temperature and high pressure - Google Patents
Sensitive element with high precision resistant to high temperature and high pressure Download PDFInfo
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- CN103063177A CN103063177A CN2012105779037A CN201210577903A CN103063177A CN 103063177 A CN103063177 A CN 103063177A CN 2012105779037 A CN2012105779037 A CN 2012105779037A CN 201210577903 A CN201210577903 A CN 201210577903A CN 103063177 A CN103063177 A CN 103063177A
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Abstract
The invention belongs to the technical field of airborne equipment, in particular to a sensitive element with high precision resistant to high temperature and high pressure for a fuel regulator and aims to provide a sensitive element capable of sensing high temperature environment and high pressure environment at the same time. The sensitive element with high precision resistant to the high temperature and the high pressure comprises a welded bellow, a spring, washers and an end cover. The welded bellow is welded to form a diaphragm string through a plurality of diaphragms. One end of the diaphragm string is connected with a seat in a welded mode, and the other end of the diaphragm string is connected with a center shaft in a welded mode. The one end of the diaphragm string connected with the seat and the other end of the diaphragm string connected with the center shaft together form a sealed cavity structure. The welded bellow is arranged in the spring. One end of the spring is connected with the seat of the welded bellow, the other end of the spring is pressed with the end cover, the end cover is connected with the center shaft of the welded bellow in a screw mode, and a plurality of washers are arranged between the welded bellow and the seat. The sensitive element with high precision resistant to the high temperature and the high pressure has the advantages of increasing rigid of a component, meeting the high temperature and the high pressure working conditions, meeting specification requirements of the sensitive element, realizing high precision miniaturization combination resistant to the high temperature and the high pressure, meeting development requirements of the high precision miniaturization sensitive element in the high temperature and the high pressure environment in future, and reducing the design and procession difficulties of products.
Description
Technical field
The invention belongs to the technical field of airborne equipment, be specifically related to the high temperature high voltage resistant high precision sensitive element that a kind of fuel regulator is used, it efficiently solves and will satisfy future under high temperature, the hyperbaric environment, the needs of miniaturization sensitive element development, have simultaneously high precision, long-life characteristics, reduced simultaneously design, the technology difficulty of product.
Background technology
Satisfy simultaneously high temperature resistant, high voltage bearing sensitive element for needs, prior art is to design respectively resistant to elevated temperatures sensitive element and high voltage bearing sensitive element makes up, satisfy the requirement under different environmental baselines, so can bring the difficult problems such as demand for development that design is complicated, the processes difficulty is large, the product monnolithic case can't be realized miniaturization.
Summary of the invention
Goal of the invention of the present invention: propose a kind of high precision sensitive element that can experience simultaneously high temperature, hyperbaric environment.
The present invention adopts following technical scheme to realize: high temperature high voltage resistant high precision sensitive element comprises welding bellows, spring, packing ring and end cap; Welding bellows is welded into the diaphragm string by some diaphragms, an end and base welding, and the other end and central shaft welding form the seal chamber structure jointly; Welding bellows is contained in the spring, and an end of spring is connected with the base of welding bellows, and the other end of spring is pressed with end cap, and end cap is connected with the welding bellows central axle threads, and some packing rings are set between welding bellows and the end cap.Be provided with steel-wire screw-socket in the end cap.The thickness of adjusting packing ring can make sensing assembly reach different length, the extraneous temperature and pressure of impression during welding bellows work, axially output integrated displacement.
Cut edge in the diaphragm centre punching of described welding bellows, edge, inner circle and inner circle electron beam welding between the diaphragm, and the diaphragm string that cylindrical and cylindrical electron beam welding form, the welding bellows inner chamber charges temperature sensing liquid.The welding bellows assembly adopts vacuum electron beam welding by convoluted diaphragm after side cut, punching, after base and central shaft electron beam welding, the bulk heat treatmet timeliness is removed stress, gain in strength, inner chamber is filled with liquid, the vacuum electron beam welding sealing, the vacuum tightness of inner chamber is high, satisfies variation of ambient temperature, low pressure and high-pressure work.The welding bellows welding manner is vacuum electron beam welding, and welding deformation is little, and the heat-affected zone is little, and weldquality is high.
Spring is that the cross section is the cylindroid helical-coil compression spring of rectangle, good linearity, and more than the absorbent energy of round section material, rigidity is closer to constant.
Both are linearity welding bellows, spring, and it is constant to be fixedly connected with rear linear characteristic, and high-pressure work is satisfied in the rigidity increase, and still can satisfy welding bellows high precision characteristics.Welding bellows and spring adopt high-temperature alloy material, and the thermal treatment timeliness satisfies under the working environment, the core parts normal operation.
The present invention has realized resistant to elevated temperatures requirement, welding bellows is connected by the end cap Screw assembly with spring, acting in conjunction increases assembly rigidity (assembly rigidity is 5～6 times of common welding bellows rigidity), satisfy high voltage bearing condition of work, assembly can also satisfy the characteristic requirements of sensitive element simultaneously, realize high temperature resistant, high pressure resistant, high precision small combination, solved and satisfied future under high temperature, the hyperbaric environment, require the needs of high-precision miniaturization sensitive element development, reduced simultaneously design, the technology difficulty of product.
The beneficial effect that the present invention has: the present invention utilizes the assembly connection of welding bellows and spring, and use high temperature alloy (GH4169) material, reached the high precision characteristic that can realize sensitive element, can under high temperature, hyperbaric environment, work again, filled up in the present domestic airborne equipment technology blank of high precision sensitive element under the high temperature and high pressure environment, efficiently solve that future products is high temperature resistant, high pressure resistant, high precision, long-life development need, reduced simultaneously design, the technology difficulty of product.The present invention is achieved in the engine fuel regulator, has guaranteed progress high temperature resistant, high pressure resistant, the production domesticization of high precision sensitive element.
Description of drawings
Fig. 1 is profile synoptic diagram of the present invention,
Fig. 2 is inner structure synoptic diagram of the present invention,
Fig. 3 is the welding bellows synoptic diagram,
Fig. 4 is the spring front view,
Fig. 5 is the spring cut-open view,
Fig. 6 is the end cap synoptic diagram,
Among the figure: 1-welding bellows, 2-spring, 3-packing ring, 4-end cap, 5-central shaft end face, 6-end cap bottom surface, 7-central shaft, 8-base.
Embodiment
By reference to the accompanying drawings the specific embodiment of the present invention is described further.
Described sensitive element is assembled by welding bellows 1, spring 2, packing ring 3, end cap 4, and the detailed synoptic diagram of structure as shown in Figure 2.
Described welding bellows 1 as shown in Figure 3, through cutting edge by 50 convoluted diaphragms, after the punching, inner circle and inner circle electron beam welding between the convoluted diaphragm, cylindrical and cylindrical electron beam welding, after being welded into the diaphragm string, two ends EBW (electron beam welding) pipe fitting, form welding bellows, removing stress after the thermal treatment timeliness gains in strength, the welding bellows inner chamber charges temperature sensing liquid, again with electron-bombardment welding sealing, so that welding bellows forms the inner chamber vacuum and charges the core sensitive element of liquid, thereby output displacement when realizing the ambient temperature change, the used metal material of welding bellows is high temperature alloy, and temperature sensing liquid is selected temperature variation responsive, and larger coefficient of volumetric expansion is arranged, the liquid of high flash-point is generally silicone oil.This structure has realized that welding bellows works because its inner chamber vacuumizes and charge temperature sensing liquid under hot environment, satisfy welding bellows with ambient pressure, temperature variation, high precision output integrated axial displacement during work.
It is the cylindroid helical-coil torsion spring of rectangle that described spring 2 adopts cross sections, and it is linear that the type spring is, take up space when identical, the square-section material is more than the absorbent energy of round section material, rigidity is closer to constant.
Described end cap 4 plays the effect that welding bellows 1 and spring 2 are connected and fixed, welding bellows 1 is contained in the spring 2, packing ring 3 is contained between welding bellows 1 and the end cap 4, end cap 4 is threaded with welding bellows 1, in the end cap 4 steel-wire screw-socket is housed, plays the locking effect of sensitive element welding bellows 1 and spring 2 under abominable working environment.
Described sensitive element is assembled by welding bellows 1, spring 2, packing ring 3, end cap 4, spring 2 is loaded on welding bellows 1 outside, packing ring 3 is contained between welding bellows 1 and the end cap 4, use special tooling with end cap 4 precession that is threaded with welding bellows 1, until the central shaft end contact of end cap bottom surface and welding bellows, length component can be realized by adjusting packing ring 3 thickness between the central shaft end face of end cap bottom surface and welding bellows.
Described sensitive element adopts high temperature alloy (GH4169) material by welding bellows 1, spring 2, obtain high consistency and elasticity by heat treating regime, packing ring 3, end cap 4 do not participate in work and only play the effect of adjusting height and being connected and fixed, and can select stainless steel material.
Described sensitive element by welding bellows 1, spring 2, packing ring 3, end cap 4 assembly connections after, all satisfy the characteristic of welding bellows 1 and spring 2, realize under the pressure change condition, the sensitive element effect is with the pressure change output displacement, satisfy pressure displacement characteristic, realization is with variation of ambient temperature, the satisfied temperature placement property, also be implemented in simultaneously pressure under 0.027MPa～1.86MPa (absolute pressure) and temperature-40 ℃～300 ℃ change condition, the placement property of the axial output integrated of sensitive element effect.Utilize the characteristic of the large displacement of welding bellows to make sensitive element have high-precision characteristic.This sensitive element can satisfy the low temperature that vibration level is 15g-40 ℃ to 300 ℃ of high temperature at present, and low pressure 0.027MPa is to the working environment request for utilization of high pressure 1.86MPa.Efficiently solve that future products is high temperature resistant, high pressure resistant, high precision, long-life development need, reduced simultaneously design, the technology difficulty of product.
Claims (5)
1. a high temperature high voltage resistant high precision sensitive element is characterized in that comprising welding bellows, spring, packing ring and end cap; Welding bellows is welded into the diaphragm string by some diaphragms, an end and base welding, and the other end and central shaft welding form the seal chamber structure jointly; Welding bellows is contained in the spring, and an end of spring is connected with the base of welding bellows, and the other end of spring is pressed with end cap, and end cap is connected with the welding bellows central axle threads, and some packing rings are set between welding bellows and the end cap.
2. high temperature high voltage resistant high precision sensitive element according to claim 1, cut edge in the diaphragm centre punching, the edge that it is characterized in that described welding bellows, inner circle and inner circle electron beam welding between the diaphragm, the diaphragm string that cylindrical and cylindrical electron beam welding form, the welding bellows inner chamber charges temperature sensing liquid.
3. high temperature high voltage resistant high precision sensitive element according to claim 1 and 2 is characterized in that spring is that the cross section is the cylindroid helical-coil compression spring of rectangle.
4. high temperature high voltage resistant high precision sensitive element according to claim 3 is characterized in that being provided with in the end cap steel-wire screw-socket.
5. high temperature high voltage resistant high precision sensitive element according to claim 4 is characterized in that welding bellows and spring adopt high-temperature alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210577903.7A CN103063177B (en) | 2012-12-27 | 2012-12-27 | A kind of high temperature high voltage resistant high precision sensitive element |
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| CN201210577903.7A CN103063177B (en) | 2012-12-27 | 2012-12-27 | A kind of high temperature high voltage resistant high precision sensitive element |
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| CN103063177A true CN103063177A (en) | 2013-04-24 |
| CN103063177B CN103063177B (en) | 2015-08-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568189A (en) * | 2014-12-08 | 2015-04-29 | 太原航空仪表有限公司 | High-temperature sensor capable of converting temperature change into displacement signal |
| CN105606290A (en) * | 2015-12-23 | 2016-05-25 | 太原航空仪表有限公司 | High-performance aero-engine pressure sensitive element and test method thereof |
| CN108318150A (en) * | 2017-12-13 | 2018-07-24 | 太原航空仪表有限公司 | A kind of temperature sensor sensing element |
| CN111827927A (en) * | 2020-07-08 | 2020-10-27 | 成都天晨压缩机制造有限公司 | Liquid impact prevention device of equipment for gathering and transporting liquid-containing oil wellhead gas in desert oil field |
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| JP2001193879A (en) * | 2000-01-11 | 2001-07-17 | Nippon Telegr & Teleph Corp <Ntt> | Vibration eliminating joint |
| CN101113797A (en) * | 2006-07-25 | 2008-01-30 | 沈阳东韩机电设备有限公司 | Large displacement corrugated pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104568189A (en) * | 2014-12-08 | 2015-04-29 | 太原航空仪表有限公司 | High-temperature sensor capable of converting temperature change into displacement signal |
| CN104568189B (en) * | 2014-12-08 | 2017-11-21 | 太原航空仪表有限公司 | A kind of pyrostat that temperature change is converted to displacement signal |
| CN105606290A (en) * | 2015-12-23 | 2016-05-25 | 太原航空仪表有限公司 | High-performance aero-engine pressure sensitive element and test method thereof |
| CN105606290B (en) * | 2015-12-23 | 2018-09-21 | 太原航空仪表有限公司 | High Performance Aeroengine pressure-sensing device and its test method |
| CN108318150A (en) * | 2017-12-13 | 2018-07-24 | 太原航空仪表有限公司 | A kind of temperature sensor sensing element |
| CN111827927A (en) * | 2020-07-08 | 2020-10-27 | 成都天晨压缩机制造有限公司 | Liquid impact prevention device of equipment for gathering and transporting liquid-containing oil wellhead gas in desert oil field |
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| Publication number | Publication date |
|---|---|
| CN103063177B (en) | 2015-08-19 |
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