CN209264159U - Ceramic piezoresistance, pressure sensor inner hole radial seal structure - Google Patents
Ceramic piezoresistance, pressure sensor inner hole radial seal structure Download PDFInfo
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- CN209264159U CN209264159U CN201920018848.5U CN201920018848U CN209264159U CN 209264159 U CN209264159 U CN 209264159U CN 201920018848 U CN201920018848 U CN 201920018848U CN 209264159 U CN209264159 U CN 209264159U
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- inner hole
- pressure sensor
- piezoresistance
- shell
- radial seal
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Abstract
The utility model relates to ceramic piezoresistance, pressure sensor inner hole radial seal structures, the plug for including shell and being connect with shell one end, installation cavity is formed between shell and plug, wiring board and ceramic piezoresistance, pressure sensor are disposed with towards one end of plug in installation cavity, the ceramics piezoresistance, pressure sensor is provided with inner hole far from one end of wiring board, it is characterized by: the shell is provided with limiting stand at inner hole, radial seal structure is provided between the limiting stand and inner hole, the utility model has the following beneficial effects: using radial seal structure, by mount stress by originally perceiving face direction perpendicular to pressure, it is converted into the inner hole radial direction in the perception face of being parallel to, improve the precision of sensor, reduce the creep of sensor, improve the reliability and convenience of installation, improve sealing performance, extend ceramic pressure Che Chengben is used in the service life of damping force snesor, reduction.
Description
Technical field
The utility model relates to ceramic piezoresistance, pressure sensor fields, and in particular to ceramic piezoresistance, pressure sensor internal orifice dimension
To sealing structure.
Background technique
Ceramic piezoresistance, pressure sensor is equipped between shell close when applying in ceramic piezoresistance, pressure sensor assembly
Seal structure, the silent thickness of the ceramic piezoresistance, pressure sensor other end open at one end about only have 30-50 thick, traditional sealing structures
It is all that setting sealing ring carries out flat seal to it at opening outer wall, but this structure is acted directly on due to mount stress
Outer wall is transmitted to one end of pressure sensitive diaphragm, generates mount stress, causes pressure data there are error, pressure after long-time service
Reaction diaphragm will gradually change under impact force action or discharge original mount stress, and mount stress changes or presses after discharging
The measurement result of force snesor can generate offset, cause stress sensor, accuracy decline.It can often make in use for some time
It is excessive at ceramic piezoresistance, pressure sensor measurement error, to need replacing ceramic piezoresistance, pressure sensor.Meanwhile flat seal
Requirement to assembly equipment is relatively high, to avoid there is sealing surface unbalance stress.
Utility model content
The technical problem to be solved by the utility model is in view of the above shortcomings of the prior art,
The ceramic piezoresistance, pressure sensor inner hole radial seal structure that ceramic piezoresistance, pressure sensor can be greatly prolonged is provided.
To achieve the above object, the utility model provides following technical solution: ceramic piezoresistance, pressure sensor internal orifice dimension
Include shell and the plug that is connect with shell one end to sealing structure, form installation cavity between shell and plug, in installation cavity
It is disposed with wiring board and ceramic piezoresistance, pressure sensor towards one end of plug, the ceramics piezoresistance, pressure sensor is separate
One end of wiring board is provided with inner hole, it is characterised in that: the shell is provided with limiting stand at inner hole, the limiting stand with it is interior
Radial seal structure is provided between hole.
By adopting the above technical scheme, traditional sealing structure is all that sealing structure, but this knot is arranged at opening outer wall
Structure is acting directly on one end that outer wall is transmitted to pressure sensitive diaphragm due to impact force, generates mount stress, leads to number pressure
According to there are errors, pressure sensitive diaphragm will gradually change or be discharged under impact force action original installation and answer after long-time service
Power, mount stress change or release after the measurement result of pressure sensor can generate offset, sensor is caused stress, under precision
Drop.It is excessive often to will cause ceramic piezoresistance, pressure sensor measurement error in use for some time, to need replacing ceramics
Piezoresistance, pressure sensor.Meanwhile requirement of the flat seal to assembly equipment is relatively high, to avoid there is sealing surface unbalance stress.
The utility model is arranged radial using limiting stand is arranged on shell between limiting stand and ceramic piezoresistance, pressure sensor inner hole
Sealing structure, by this sealing structure by mount stress by being changed to be parallel to pressure sensitive perpendicular to pressure sensitive diaphragm direction
The inner hole radial direction of diaphragm, since outer wall thickness is far longer than the thickness at the inner hole opposed open other end, to peace
The ability to bear for filling stress is stronger, improves the precision of sensor, reduces the creep of sensor, improves the reliability of installation
And convenience, sealing performance is improved, the service life of ceramic piezoresistance, pressure sensor is extended, Che Chengben is used in reduction.
Above-mentioned ceramic piezoresistance, pressure sensor inner hole radial seal structure can be further arranged to: the radial seal knot
Structure includes the erecting bed that limiting stand is arranged close to one end of inner hole, and sealing ring, the sealing ring phase is arranged on the erecting bed
It is interference fitted between the other end and inner hole of connection erecting bed.
By adopting the above technical scheme, by the way that erecting bed is arranged close to one end of inner hole in limiting stand, it is arranged on erecting bed
The sealing ring being interference fitted between inner hole realizes radial seal.
The utility model has the following beneficial effects: using radial seal structure, by mount stress by originally perpendicular to feeling of stress
Know face direction, is converted into the inner hole radial direction in the perception face of being parallel to, improves the precision of sensor, reduce the compacted of sensor
Become, improve the reliability and convenience of installation, improve sealing performance, extend ceramic piezoresistance, pressure sensor uses the longevity
Che Chengben is used in life, reduction.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the utility model embodiment.
Specific embodiment
It is shown in Figure 1: ceramic piezoresistance, pressure sensor inner hole radial seal structure, include shell 1 and with shell 1 one
The plug 2 for holding connection forms installation cavity 3, is disposed in installation cavity 3 towards one end of plug 1 between shell 1 and plug 2
Wiring board 4 and ceramic piezoresistance, pressure sensor 5, ceramic piezoresistance, pressure sensor 5 are provided with inner hole far from one end of wiring board 4
51, shell 1 is provided at inner hole 51 to be installed for ceramic piezoresistance, pressure sensor 5 and limits ceramic piezoresistance, pressure sensor 5
Limiting stand 11, radial seal structure is provided between limiting stand 11 and inner hole 51, radial seal structure includes limiting stand 11
Sealing ring 6, the opposite connection erecting bed 12 of sealing ring 6 are set on the erecting bed 12 of one end of inner hole 51 setting, erecting bed 12
The other end and inner hole 51 between be interference fitted.
Claims (2)
- The plug that 1. ceramic piezoresistance, pressure sensor inner hole radial seal structure includes shell and is connect with shell one end, shell Installation cavity is formed between body and plug, is disposed with wiring board towards one end of plug in installation cavity and ceramic piezoresistive pressure passes Sensor, the ceramics piezoresistance, pressure sensor are provided with inner hole far from one end of wiring board, it is characterised in that: including the shell It is provided with limiting stand at hole, is provided with radial seal structure between the limiting stand and inner hole.
- 2. ceramics piezoresistance, pressure sensor inner hole radial seal structure according to claim 1, it is characterised in that: the diameter Include the erecting bed of one end setting of the close inner hole of limiting stand to sealing structure, sealing ring is set on the erecting bed, it is described It is interference fitted between the other end and inner hole of the opposite connection erecting bed of sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920018848.5U CN209264159U (en) | 2019-01-07 | 2019-01-07 | Ceramic piezoresistance, pressure sensor inner hole radial seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920018848.5U CN209264159U (en) | 2019-01-07 | 2019-01-07 | Ceramic piezoresistance, pressure sensor inner hole radial seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209264159U true CN209264159U (en) | 2019-08-16 |
Family
ID=67584203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920018848.5U Active CN209264159U (en) | 2019-01-07 | 2019-01-07 | Ceramic piezoresistance, pressure sensor inner hole radial seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209264159U (en) |
-
2019
- 2019-01-07 CN CN201920018848.5U patent/CN209264159U/en active Active
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