CN205785651U - A kind of for the manometric diaphragm unit of small-range - Google Patents
A kind of for the manometric diaphragm unit of small-range Download PDFInfo
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- CN205785651U CN205785651U CN201620405833.0U CN201620405833U CN205785651U CN 205785651 U CN205785651 U CN 205785651U CN 201620405833 U CN201620405833 U CN 201620405833U CN 205785651 U CN205785651 U CN 205785651U
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Abstract
This utility model belongs to pressure gauge design field, relates to a kind of for the manometric diaphragm unit of small-range.It is characterized in that: it is made up of diaphragm (1), center-pole (2) and steel ball (3).This utility model provides a kind of for the manometric diaphragm unit of small-range, reduces volume, simplifies structure, improve precision, reduce nonlinearity erron, has the ability of the hot environment of anti-more than 100 DEG C simultaneously.
Description
Technical field
This utility model belongs to pressure gauge design field, relates to a kind of for the manometric diaphragm unit of small-range.
Background technology
When Pressure gauge uses in aircraft oxygen system small-range (below 5MPa), its installing space is limited by system overall space, the volume of the copper alloy Bourdon tube sensing element that traditional Pressure gauge is used is big, assembling complexity, precision is low, nonlinearity erron is big, and for easily losing efficacy under the hot environment of more than 100 DEG C.
Utility model content
The purpose of this utility model is: provides one for the manometric diaphragm unit of small-range, in order to reduce volume, simplifies structure, improves precision, nonlinear error reduction, have the ability of the hot environment of anti-more than 100 DEG C simultaneously.
The technical solution of the utility model is: a kind of for the manometric diaphragm unit of small-range, it is characterised in that: it is made up of diaphragm 1, center-pole 2 and steel ball 3；The shape of the vertical centre section of diaphragm 1 is one and has flat bowl-type profile, bowl wall 1d of diaphragm 1 shape is cylindrical, it it is plane at the bottom of the bowl of diaphragm 1, upper port at diaphragm 1 has flange 1a, there is a round boss 1b in bottom center at diaphragm 1, having a through hole 1c on round boss 1b, the epimere aperture of this through hole 1c is less than hypomere aperture；Center-pole 2 is a circular shaft, it is divided into 3 sections from top to bottom, it is the first cylindrical section respectively, second cylindrical section and conical section, first cylindrical section is positioned at the lower sector hole of through hole 1c on round boss 1b and keeps interference fit, seam welds between first cylindrical section lower surface and round boss 1b lower surface is overall simultaneously, second cylindrical section of center-pole 2 upwards passes from the upper sector hole of this through hole 1c, the upper surface of center-pole 2 has a ball-and-socket, steel ball 3 is positioned at above-mentioned ball-and-socket, and the diameter of steel ball 3 is more than the diameter of ball-and-socket.
The invention have the advantage that and provide a kind of for the manometric diaphragm unit of small-range, reduce volume, simplify structure, improve precision, reduce nonlinearity erron, there is the ability of the hot environment of anti-more than 100 DEG C simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of diaphragm in the present invention.
Fig. 3 is installation and the operation principle schematic diagram of the present invention.
Detailed description of the invention
Below this utility model is described in further details, sees Fig. 1 to Fig. 3.It is a kind of for the manometric diaphragm unit of small-range, it is characterised in that: it is made up of diaphragm 1, center-pole 2 and steel ball 3；The shape of the vertical centre section of diaphragm 1 is one and has flat bowl-type profile, bowl wall 1d of diaphragm 1 shape is cylindrical, it it is plane at the bottom of the bowl of diaphragm 1, upper port at diaphragm 1 has flange 1a, there is a round boss 1b in bottom center at diaphragm 1, having a through hole 1c on round boss 1b, the epimere aperture of this through hole 1c is less than hypomere aperture；Center-pole 2 is a circular shaft, it is divided into 3 sections from top to bottom, it is the first cylindrical section respectively, second cylindrical section and conical section, first cylindrical section is positioned at the lower sector hole of through hole 1c on round boss 1b and keeps interference fit, seam welds between first cylindrical section lower surface and round boss 1b lower surface is overall simultaneously, second cylindrical section of center-pole 2 upwards passes from the upper sector hole of this through hole 1c, the upper surface of center-pole 2 has a ball-and-socket, steel ball 3 is positioned at above-mentioned ball-and-socket, and the diameter of steel ball 3 is more than the diameter of ball-and-socket.
Outside diameter d=17mm～21mm of described diaphragm 1 bowl wall 1d, bowl base thickness degree t=0.2mm～0.4mm of diaphragm 1.
The material of diaphragm 1 is constant elastic alloy 3J53.
Operation principle of the present utility model is: this utility model is a kind of for the manometric diaphragm unit of small-range, see Fig. 3, diaphragm unit is attached so that welding manner and pressure are spigot joint, ensure that the sealing in Pressure gauge, use the diaphragm of 3J53 material, it uses temperature to be no more than 200 DEG C, and intensity and elasticity are better than copper alloy；After diaphragm unit load, diaphragm produces and expands, center-pole is driven to produce axial displacement, the non-linear displacement degree ＜ 2% that diaphragm produces in expansion process, center-pole is connected with enlarger, be displaced through enlarger with certain proportion amplify after, drive gauge hand move indicating graduation, when pressure release, " line pressure shift " lag error ＜ 3% of diaphragm unit.
Embodiment 1
A kind of for the manometric diaphragm unit of small-range, its bowl of base thickness degree t=0.2mm～0.25mm, outside diameter d=20mm～21mm of bowl wall 1d.
Claims (3)
1. one kind is used for the manometric diaphragm unit of small-range, it is characterised in that: it is made up of diaphragm (1), center-pole (2) and steel ball (3)；The shape of the vertical centre section of diaphragm (1) is one and has flat bowl-type profile, the bowl wall (1d) of diaphragm (1) shape is cylindrical, it is plane at the bottom of the bowl of diaphragm (1), upper port at diaphragm (1) has flange (1a), there is a round boss (1b) in bottom center at diaphragm (1), having a through hole (1c) on round boss (1b), the epimere aperture in this through hole (1c) is less than hypomere aperture；Center-pole (2) is a circular shaft, it is divided into 3 sections from top to bottom, it is the first cylindrical section respectively, second cylindrical section and conical section, first cylindrical section is positioned at the lower sector hole in the upper through hole (1c) of round boss (1b) and keeps interference fit, seam welds between first cylindrical section lower surface and round boss (1b) lower surface is overall simultaneously, second cylindrical section of center-pole (2) the upper sector hole from this through hole (1c) upwards passes, the upper surface of center-pole (2) has a ball-and-socket, steel ball (3) is positioned at above-mentioned ball-and-socket, the diameter of steel ball (3) is more than the diameter of ball-and-socket.
Diaphragm unit the most according to claim 1, it is characterised in that: outside diameter d=17mm～21mm of described diaphragm (1) bowl wall (1d), bowl base thickness degree t=0.2mm～0.4mm of diaphragm (1).
3. diaphragm unit as claimed in claim 1 or 2, it is characterised in that: the material of diaphragm (1) is constant elastic alloy 3J53.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405833.0U CN205785651U (en) | 2016-05-04 | 2016-05-04 | A kind of for the manometric diaphragm unit of small-range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405833.0U CN205785651U (en) | 2016-05-04 | 2016-05-04 | A kind of for the manometric diaphragm unit of small-range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205785651U true CN205785651U (en) | 2016-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620405833.0U Active CN205785651U (en) | 2016-05-04 | 2016-05-04 | A kind of for the manometric diaphragm unit of small-range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205785651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387318A (en) * | 2017-08-02 | 2019-02-26 | 成都凯天电子股份有限公司 | High-pressure compressor intake pipe absolute pressure sensor |
-
2016
- 2016-05-04 CN CN201620405833.0U patent/CN205785651U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387318A (en) * | 2017-08-02 | 2019-02-26 | 成都凯天电子股份有限公司 | High-pressure compressor intake pipe absolute pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 230051 No. 35 Yan'an Road, Baohe Industrial Zone, Hefei City, Anhui Province Patentee after: Hefei Jianghang Aircraft Equipment Co., Ltd. Address before: 230051 Anhui Province, Hefei City Industrial Park Yanan Baohe Road No. 35 Patentee before: Hefei Jianghang Aircraft Equipment Co., Ltd. |