CN207036329U - A kind of strain pressure transducer stress transferring structure - Google Patents
A kind of strain pressure transducer stress transferring structure Download PDFInfo
- Publication number
- CN207036329U CN207036329U CN201721003472.8U CN201721003472U CN207036329U CN 207036329 U CN207036329 U CN 207036329U CN 201721003472 U CN201721003472 U CN 201721003472U CN 207036329 U CN207036329 U CN 207036329U
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- China
- Prior art keywords
- power bar
- end beam
- pressure transducer
- support
- sensitive diaphragm
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Abstract
The utility model discloses a kind of strain pressure transducer stress transferring structure, including sensitive diaphragm, power bar, support, both-end beam and foil gauge；The sensitive diaphragm periphery is welded on support；Pedestal upper end opens up centre bore, and the power bar freely up and down can movably pass through the centre bore, and power bar upper end is connected with sensitive diaphragm center；Support both sides open up two mutually corresponding mounting holes, and the both ends of the both-end beam are inserted and secured in mounting hole respectively, and power bar lower end is connected to both-end beam center；Both-end beam is nonprismatic beam, and its area of section first reduces again gradually increase from both ends to centre, and the strain gauge adhesion is in the minimum region of both-end beam section.The utility model uses beam diaphragm structure and stress concentration nonprismatic beam technology, and available for small-range pressure sensor, sensitivity is big, and foil gauge is easy for installation, and positioning requirements are relatively low.
Description
Technical field
The utility model belongs to pressure sensor technique field, more particularly to a kind of strain pressure transducer stress transmission
Structure.
Background technology
At present many fluid pressure sensors all using MEMS pressure sensor chip as sensing element, single one
MEMS pressure sensor chip can complete the measurement of pressure.But MEMS pressure sensor chip mainly uses monocrystalline silicon and borosilicate
Glass makes, and Adaptability of medium is poor, is limited for use to non-aggressive and dielectric gas or liquid pressure measurement, application
By being limited.Therefore, there is a kind of core body of oil-filled encapsulating structure, filled between the convoluted diaphragm and chip of sensor
Silicone oil, Fig. 1 are the core schematic diagram of oil-filled encapsulation, including convoluted diaphragm 10, pressure ring 20, pressure chip 30, Metal Substrate
Seat 40, lead 50.Ambient pressure is acted on convoluted diaphragm 10, and pressure chip 30 is passed to by silicone oil, suitable for it is stainless
, easily there is oil leak in steel convoluted diaphragm mutually compatible various gases or liquid medium, but due to internal embedding silicone oil, reliability compared with
Difference.
As shown in Fig. 2 existing strain pressure transducer improves a lot without embedding silicone oil, reliability.Common
The stress transferring structure of strain pressure transducer is the stickup foil gauge 60 directly on sensitive diaphragm 70, is led under pressure
Cross sensitive diaphragm 70 and stress is passed to foil gauge 60.But there is also following defect for the strain pressure transducer：
1st, foil gauge 60 is affixed directly to the back side of sensitive diaphragm 70, and the stress that diverse location is subject on sensitive diaphragm 70 is not
Together, therefore to foil gauge paste position require higher, positioning difficulty is larger, higher to production requirement；
2nd, No-mistake Principle is protected, and as pressure increases, the strain that sensitive diaphragm 70 occurs is also increasing, easily causes to export
Signal is excessive；
3rd, stress suffered by foil gauge 60 depends on stress caused by sensitive diaphragm 70, is not suitable for the pressure of small amount journey
Sensor, sensitivity are relatively low.
Utility model content
The purpose of this utility model is the stress transferring structure for providing a kind of strain pressure transducer, and it uses beam film
Structure and stress concentration nonprismatic beam technology, available for small-range pressure sensor, sensitivity is big, and foil gauge installation side
Just, positioning requirements are relatively low.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of strain pressure transducer stress transferring structure, including sensitive diaphragm, power bar, support, both-end beam and strain
Piece；The sensitive diaphragm periphery is welded on support；Pedestal upper end opens up centre bore, and the power bar freely up and down can movably be worn
The centre bore is crossed, and power bar upper end is connected with sensitive diaphragm center；Support both sides open up two mutually corresponding mounting holes, institute
The both ends for stating both-end beam are inserted and secured in mounting hole respectively, and power bar lower end is connected to both-end beam center；It is among both-end beam
Nonprismatic beam, and its area of section first reduces again gradually increase from both ends to centre, the strain gauge adhesion is cut in both-end beam
The minimum region in face.
The periphery of the cantilever tip raises up the solder side to be formed for welding sensitive diaphragm.
The cantilever tip is centrally formed overload protection ring, and the overload protection ring is looped around around centre bore, and overloads
Protection ring is highly less than solder side.
The power bar upper end is welded on sensitive diaphragm center, and spliced eye, the power bar lower end are opened up among the both-end beam
It is inserted rotatably into and is connected in the spliced eye.
The power bar outer peripheral face forms external thread structure, and the spliced eye opened up among both-end beam is screw, and power bar passes through institute
The cooperation for stating external thread mechanism and screw is connected with the both-end beam.
The power bar outer peripheral face forms external thread structure, after power bar passes through the spliced eye, on the external thread structure
Nut is screwed in, so that power bar is connected with the both-end beam.
The both ends of the both-end beam are cylinder, and the mounting hole of the support is circular hole.
After such scheme, the utility model causes sensitive diaphragm center in use, pressure is acted on sensitive diaphragm
Deform upon, power is passed to by power bar by both-end beam, both-end beam is bent, and stress, strain are produced at strain gauge adhesion
Strain effect, which occurs, for piece causes resistance to change, and electric signal with proportional pressure can be obtained by detecting circuit.
The utility model has advantages below：
First, using beam diaphragm structure, using stress concentration non-constant section technology, sensitivity is improved, available for a small amount of stroke pressures
Sensor；
2nd, there is overload protection function；
3rd, for strain gauge adhesion in region of stress concentration, positioning requirements are low, are easy to produce.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the core schematic diagram of existing oil-filled encapsulation；
Fig. 2 is the stress transferring structure schematic diagram of existing strain pressure transducer；
Fig. 3 is sectional side view of the present utility model；
Fig. 4 is the dimensional structure diagram of the utility model support.
Label declaration
Convoluted diaphragm 10, pressure ring 20, pressure chip 30, metal base 40, lead 50, foil gauge 60；
Sensitive diaphragm 1, power bar 2, support 3, solder side 31, centre bore 32, mounting hole 33, overload protection ring 34, both-end beam
4, spliced eye 41, foil gauge 5.
Embodiment
As shown in Figures 3 and 4, a kind of strain pressure transducer stress transferring structure that the utility model discloses, including it is quick
Feel diaphragm 1, power bar 2, support 3, both-end beam 4 and foil gauge 5；The periphery of sensitive diaphragm 1 is welded on support 3, the top of support 3
Periphery raise up the solder side 31 to be formed for welding sensitive diaphragm, sensitive diaphragm 1 with the solder side 31 by welding reality
Now with the connection of support 3；The upper end of support 3 opens up centre bore 32, and the power bar 2 freely up and down can movably pass through the centre bore
32, and the upper end of power bar 2 is connected with the center of sensitive diaphragm 1, power bar upper end and the center connected mode preferred weld of sensitive diaphragm 1；Branch
The both sides of frame 3 open up two mutually corresponding mounting holes 33, and the both ends of the both-end beam 4 are inserted and are weldingly fixed on mounting hole respectively
In 33, the lower end of power bar 2 is connected to the center of both-end beam 4, and spliced eye 41 is opened up among the both-end beam 4, and the lower end of power bar 2 passes through grafting
Welded behind hole 41 with both-end beam 4；It is nonprismatic beam among both-end beam 4, and its area of section is first reduced again from both ends to centre
Gradually increase, the foil gauge 5 are pasted onto the minimum region in the section of both-end beam 4.
Preferably, the top of support 3 is centrally formed overload protection ring 34, and the overload protection ring 34 is looped around centre bore 32 weeks
Enclose, and the height of overload protection ring 34 is less than solder side 31, in 1 stress overloading of sensitive diaphragm, wherein heart-shaped become big, sensitive diaphragm
Gap between 1 center and support 3 be present, the center of sensitive diaphragm 1 presses to prop up overload protection ring 34 after do not continue to increase
Deformation, to provide overload protection function, wherein overload protection ring 34 relative to the height of solder side 31 according to the material of sensitive diaphragm 1
Matter, the sensor application field are determined.
In addition to above-mentioned welding manner, the connection of power bar 2 and both-end beam 4 is also provided with using other modes, in the both-end beam 4
Between open up spliced eye 41, the lower end of power bar 2 is inserted rotatably into and is connected in the spliced eye 41, is inserted rotatably into mode
One is：The outer peripheral face of power bar 2 forms external thread structure, and the spliced eye 41 opened up among both-end beam 4 is screw, and power bar 2 is by described
The cooperation of external thread mechanism and screw is connected with the both-end beam.Mode two is：The outer peripheral face of power bar 2 forms external screw thread knot
Structure, after power bar passes through the spliced eye 41, nut is screwed on the external thread structure, so that power bar 2 connects with the both-end beam 4
Connect.
The both ends of the both-end beam 4 are cylinder, and mounting hole 33 be circular hole, the mounting hole 33 on the insertion support 3 of both-end beam 4
It is rotatable afterwards, adjustment angle, spliced eye 41 is matched with power bar 2；The intermediate region of both-end beam 4 is nonprismatic beam, stress concentration
In smallest cross-sectional region, foil gauge 5 is pasted onto the region, to maximize stress, improves sensitivity.
During utility model works, pressure, which is acted on sensitive diaphragm 1, causes the center of sensitive diaphragm 1 to deform upon, and passes through
Power is passed to both-end beam 4 by power bar 2, and both-end beam 4 bends, and stress is produced in the location for paste of foil gauge 5, foil gauge 5 occurs should
Change effect causes resistance to change, and electric signal with proportional pressure can be obtained by detecting circuit.
Specific embodiment of the utility model is these are only, not to the restriction of the scope of protection of the utility model.
The equivalent variations that all mentalities of designing according to this case are done, each fall within the protection domain of this case.
Claims (8)
- A kind of 1. strain pressure transducer stress transferring structure, it is characterised in that：Including sensitive diaphragm, power bar, support, both-end Beam and foil gauge；The sensitive diaphragm periphery is welded on support；Pedestal upper end opens up centre bore, and the power bar can be freely up and down The centre bore is movably passed through, and power bar upper end is connected with sensitive diaphragm center；Support both sides open up two mutually corresponding to Mounting hole, the both ends of the both-end beam are inserted and secured in mounting hole respectively, and power bar lower end is connected to both-end beam center；Both-end Beam is nonprismatic beam, and its area of section first reduces again gradually increase from both ends to centre, and the strain gauge adhesion is in both-end The minimum region of beam section.
- A kind of 2. strain pressure transducer stress transferring structure as claimed in claim 1, it is characterised in that：The top of support The periphery at end raises up the solder side to be formed for welding sensitive diaphragm.
- A kind of 3. strain pressure transducer stress transferring structure as claimed in claim 2, it is characterised in that：The top of support End is centrally formed overload protection ring, and the overload protection ring is looped around around centre bore, and overload protection ring is highly less than welding Face.
- A kind of 4. strain pressure transducer stress transferring structure as claimed in claim 1, it is characterised in that：On the power bar End is welded on sensitive diaphragm center, and spliced eye is opened up among the both-end beam, and power bar lower end is welded after passing through spliced eye with both-end beam Connect, the both ends of the both-end beam are weldingly fixed in mounting hole.
- A kind of 5. strain pressure transducer stress transferring structure as claimed in claim 1, it is characterised in that：The both-end beam Centre opens up spliced eye, and the power bar lower end is inserted rotatably into and is connected in the spliced eye.
- A kind of 6. strain pressure transducer stress transferring structure as claimed in claim 5, it is characterised in that：Outside the power bar Side face forms external thread structure, and the spliced eye opened up among both-end beam is screw, and power bar passes through the external thread mechanism and screw Cooperation be connected with the both-end beam.
- A kind of 7. strain pressure transducer stress transferring structure as claimed in claim 5, it is characterised in that：Outside the power bar Side face formed external thread structure, power bar pass through the spliced eye after, screw in nut on the external thread structure so that power bar with The both-end beam connection.
- A kind of 8. strain pressure transducer stress transferring structure as claimed in claim 1, it is characterised in that：The both-end beam Both ends for cylinder, the mounting hole of the support is circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721003472.8U CN207036329U (en) | 2017-08-11 | 2017-08-11 | A kind of strain pressure transducer stress transferring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721003472.8U CN207036329U (en) | 2017-08-11 | 2017-08-11 | A kind of strain pressure transducer stress transferring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207036329U true CN207036329U (en) | 2018-02-23 |
Family
ID=61487192
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721003472.8U Active CN207036329U (en) | 2017-08-11 | 2017-08-11 | A kind of strain pressure transducer stress transferring structure |
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| Country | Link |
|---|---|
| CN (1) | CN207036329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848105A (en) * | 2019-11-20 | 2020-02-28 | 山东尤科斯石油装备有限公司 | Plunger pump hydraulic end assembly |
-
2017
- 2017-08-11 CN CN201721003472.8U patent/CN207036329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848105A (en) * | 2019-11-20 | 2020-02-28 | 山东尤科斯石油装备有限公司 | Plunger pump hydraulic end assembly |
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