CN103063177B - A kind of high temperature high voltage resistant high precision sensitive element - Google Patents
A kind of high temperature high voltage resistant high precision sensitive element Download PDFInfo
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- CN103063177B CN103063177B CN201210577903.7A CN201210577903A CN103063177B CN 103063177 B CN103063177 B CN 103063177B CN 201210577903 A CN201210577903 A CN 201210577903A CN 103063177 B CN103063177 B CN 103063177B
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Abstract
The invention belongs to the technical field of airborne equipment, be specifically related to a kind of high temperature high voltage resistant high precision sensitive element of fuel regulator, goal of the invention proposes a kind of sensitive element simultaneously can experiencing high temperature, hyperbaric environment.It comprises welding bellows, spring, packing ring and end cap; Welding bellows is welded into diaphragm string by some diaphragms, and one end is welded with base, and the other end welds with central shaft, common formation seal chamber structure; Welding bellows is contained in spring, and one 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 welding bellows central axle threads, arranges some packing rings between welding bellows and end cap.Acting in conjunction of the present invention increases assembly rigidity, meets the condition of work of high pressure, can also meet the characteristic requirements of sensitive element, realizes high temperature resistant, high pressure resistant, high precision smallization combination; Under efficiently solving following high temperature, hyperbaric environment, require to reduce the design of product, technology difficulty by the needs that high-precision miniaturization sensitive element develops simultaneously.
Description
Technical field
The invention belongs to the technical field of airborne equipment, be specifically related to a kind of high temperature high voltage resistant high precision sensitive element of fuel regulator, under it efficiently solves and will meet high temperature, hyperbaric environment future, the needs of miniaturization sensitive element development, there is high precision, long-life feature simultaneously, reduce the design of product, technology difficulty simultaneously.
Background technology
High temperature resistant, high voltage bearing sensitive element is met simultaneously for needs, prior art designs resistant to elevated temperatures sensitive element respectively and high voltage bearing sensitive element combines, meet the requirement under different environmental baselines, so can bring that design is complicated, processes difficulty large, Total Product profile cannot realize the difficult problems such as the demand for development of miniaturization.
Summary of the invention
Goal of the invention of the present invention: propose a kind of high precision sensitive element simultaneously can experiencing 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 diaphragm string by some diaphragms, and one end is welded with base, and the other end welds with central shaft, common formation seal chamber structure; Welding bellows is contained in spring, and one 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 welding bellows central axle threads, arranges some packing rings between welding bellows and end cap.Steel-wire screw-socket is provided with in end cap.The length that the thickness adjusting packing ring can make sensing assembly reach different, the temperature and pressure that during welding bellows work, impression is extraneous, axial output integrated displacement.
Its center punching of described welding bellows, edge trimming, inner circle and inner circle electron beam welding between diaphragm, the diaphragm string that cylindrical and cylindrical electron beam welding are formed, welding bellows inner chamber charges temperature sensing liquid.Welding bellows assembly adopts vacuum electron beam welding by convoluted diaphragm after trimming, punching, after base and central shaft electron beam welding, bulk heat treatmet timeliness removes stress, gain in strength, inner chamber fills with liquid, vacuum electron beam welding seals, and the vacuum tightness of inner chamber is high, meets variation of ambient temperature, low pressure and high-pressure work.Welding bellows welding manner is vacuum electron beam welding, and welding deformation is little, and heat-affected zone is little, and weldquality is high.
The cylindroid helical-coil compression spring of spring to be cross section be rectangle, good linearity, more than the absorbent energy of round section material, rigidity is closer to constant.
Welding bellows, both springs are linearly, are fixedly connected with rear linear characteristic constant, and rigidity increase meets high-pressure work, and still can meet welding bellows high precision feature.Welding bellows and spring adopt high-temperature alloy material, and thermal treatment timeliness, under meeting working environment, core parts normally work.
Present invention achieves resistant to elevated temperatures requirement, welding bellows is connected by end cap Screw assembly with spring, acting in conjunction increases assembly rigidity (assembly rigidity is 5 ~ 6 times of common welding bellows rigidity), meet high voltage bearing condition of work, assembly can also meet the characteristic requirements of sensitive element simultaneously, realize high temperature resistant, high pressure resistant, high precision smallization combination, solve under meeting high temperature, hyperbaric environment future, require to reduce the design of product, technology difficulty by the needs that high-precision miniaturization sensitive element develops simultaneously.
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, reach the high precision characteristic that can realize sensitive element, can work under high temperature, hyperbaric environment again, fill up the blank of high precision sensitive element under high temperature and high pressure environment in current domestic airborne equipment technology, efficiently solve that future products is high temperature resistant, high pressure resistant, high precision, long-life development need, reduce the design of product, technology difficulty simultaneously.The present invention is achieved in engine fuel regulator, ensure that progress that is high temperature resistant, high pressure resistant, the production domesticization of high precision sensitive element.
Accompanying drawing explanation
Fig. 1 is appearance schematic diagram of the present invention,
Fig. 2 is inner structure schematic diagram of the present invention,
Fig. 3 is welding bellows schematic diagram,
Fig. 4 is spring front view,
Fig. 5 is spring cut-open view,
Fig. 6 is end cap schematic diagram,
In 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 schematic diagram of structure as shown in Figure 2.
Described welding bellows 1 as shown in Figure 3, through trimming by 50 convoluted diaphragms, after punching, inner circle and inner circle electron beam welding between convoluted diaphragm, cylindrical and cylindrical electron beam welding, after being welded into diaphragm string, two ends EBW (electron beam welding) pipe fitting, form welding bellows, remove stress after thermal treatment timeliness to gain in strength, welding bellows inner chamber charges temperature sensing liquid, seal with electron-bombardment welding again, make welding bellows form inner chamber vacuum and charge the core sensitive element of liquid, thus realize output displacement when ambient temperature changes, welding bellows metal material used is high temperature alloy, temperature sensing liquid is selected temperature variation responsive, there is larger coefficient of volumetric expansion, the liquid of high flash-point, be generally silicone oil.This structure vacuumizes due to its inner chamber and charges temperature sensing liquid, achieves welding bellows and normally works in high temperature environments, meets welding bellows with ambient pressure, temperature variation, high precision output integrated axial displacement during work.
Described spring 2 adopts cross section to be the cylindroid helical-coil torsion spring of rectangle, the type spring linearly, taken up space identical time, square-section material is more than the absorbent energy of round section material, and 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 spring 2, packing ring 3 is contained between welding bellows 1 and end cap 4, end cap 4 is threaded with welding bellows 1, end cap 4, built with steel-wire screw-socket, plays sensitive element welding bellows 1 and the locking effect of spring 2 under severe 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 end cap 4, special tooling is used to be threaded with welding bellows 1 by end cap 4 precession, until the central shaft end contact of end cap bottom surface and welding bellows, length component can realize by adjusting packing ring 3 thickness between end cap bottom surface and the central shaft end face of welding bellows.
Described sensitive element adopts high temperature alloy (GH4169) material by welding bellows 1, spring 2, high consistency and elasticity is obtained by heat treating regime, packing ring 3, end cap 4 do not participate in the effect that work is only played adjustment height and is connected and fixed, and can select stainless steel material.
Described sensitive element is by after welding bellows 1, spring 2, packing ring 3, end cap 4 assembly connection, all meet the characteristic of welding bellows 1 and spring 2, under realizing pressure change condition, sensitive element effect is with pressure change output displacement, meet pressure displacement characteristic, realize with variation of ambient temperature, satisfied temperature placement property, also realize at pressure from 0.027MPa ~ 1.86MPa (absolute pressure) and temperature-40 DEG C ~ 300 DEG C change condition, the placement property of the axial output integrated of sensitive element effect simultaneously.The characteristic of the Large travel range of welding bellows is utilized to make sensitive element be provided with high-precision characteristic.At present this sensitive element can meet vibration level be the low temperature-40 DEG C of 15g to high temperature 300 DEG C, the working environment request for utilization of low pressure 0.027MPa to high pressure 1.86MPa.Efficiently solve that future products is high temperature resistant, high pressure resistant, high precision, long-life development need, reduce the design of product, technology difficulty simultaneously.
Claims (4)
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 diaphragm string by some diaphragms, and one end is welded with base, and the other end welds with central shaft (7), common formation seal chamber structure; Welding bellows is contained in spring, one end of spring is connected with the base of welding bellows, the other end of spring is pressed with end cap, end cap is connected with welding bellows central axle threads, some packing rings are set, its center punching of described welding bellows, edge trimming, inner circle and inner circle electron beam welding between diaphragm between welding bellows and end cap, the diaphragm string that cylindrical and cylindrical electron beam welding are formed, welding bellows inner chamber charges temperature sensing liquid.
2. high temperature high voltage resistant high precision sensitive element according to claim 1, is characterized in that spring to be cross section is the cylindroid helical-coil compression spring of rectangle.
3. high temperature high voltage resistant high precision sensitive element according to claim 1 and 2, is characterized in that being provided with steel-wire screw-socket in end cap.
4. high temperature high voltage resistant high precision sensitive element according to claim 3, is characterized in that welding bellows and spring adopt high-temperature alloy material.
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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 CN103063177A (en) | 2013-04-24 |
| CN103063177B true CN103063177B (en) | 2015-08-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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