CN203463653U - Two-section seal mechanical structure for high pressure microphone calibration - Google Patents
Two-section seal mechanical structure for high pressure microphone calibration Download PDFInfo
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- CN203463653U CN203463653U CN201320491431.3U CN201320491431U CN203463653U CN 203463653 U CN203463653 U CN 203463653U CN 201320491431 U CN201320491431 U CN 201320491431U CN 203463653 U CN203463653 U CN 203463653U
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- microphone
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- calibration
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Abstract
The utility model provides a two-section seal mechanical structure for high pressure microphone calibration. A special O-shaped ring is embedded in a groove of a thread screw-in ring, a microphone preamplifier is connected with a microphone and inserts in a mounting hole of the thread screw-in ring, so that the special O-shaped ring is tightly pressed between the thread screw-in ring and the microphone. A standard O-shaped ring and a wedge-shaped seal top ring are embedded in a mounting hole of a microphone mounting wall. The microphone is sleeved in a microphone protective grid casing, the microphone protective grid casing inserts in the mounting hole of the microphone mounting wall, the thread screw-in ring is tightened up, and the microphone mounting wall and the microphone protective grid casing are tightly pressed through the standard O-shaped ring and the wedge-shaped seal ring under thread screwing thrust. By the aid of the two-section seal mechanical structure, position of the microphone can be fixed, an axis of the microphone and an axis of the mounting hole can not deviate, and pressure leakage rate is lowered by the aid of a double-layered seal structure.
Description
Technical field
The utility model relates to acoustic metrology technical field, is specifically related to a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone.
Background technique
Microphone, in calibration process, need to be sealed in the Cartridge of microphone in coupler, forms airtight standard pressure sound field and implement calibration operation in chamber, and the structural representation that its sealing is installed as shown in Figure 1.In columniform coupler both sides, stretch out hook, linking springs between upper end compressing tablet and hook, the pulling force of spring is pressed into microphone in mounting hole uniformly, adopts the sealing of O type circle between mounting hole and microphone.The deficiency of this sealing means: the necessary at right angle setting of (1) microphone, if level installation can make microphone axis not overlap with mounting hole axis, causes calibration error; (2) it is asymmetric that must there be symmetrical ，Ruo position, hook mounting point coupler both sides, can cause spring tension asymmetric, causes the skew of microphone, causes calibration error; (3) in extreme value sound calibration process, have, acoustic pressure is revealed, and when sound pressure level reaches 170dB, pressure peak can reach 8.9kPa, is difficult to assurance pressure and can reveal, and causes calibration error.In high sound pressure microphone calibration process, require microphone to need level to install, attachment face is cylndrical surface, and sound pressure level can reach 170dB, existing microphone mounting technique is difficult to realize calibration requirements.
Summary of the invention
For solving the pressure leakages problem that in high sound pressure microphone calibration process, microphone level is installed, the utility model provides a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone.
Realize the technological scheme of the utility model object: a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone, its forward end seal comprises standard O type circle and wedge-type seal collar, back segment sealing comprises special-shaped O type circle and screw thread precession circle; Wherein, special-shaped O type circle embeds in the groove of screw thread precession circle, after microphone preamplifier is connected with microphone, inserts in the mounting hole of screw thread precession circle, and the special-shaped O type circle between screw thread precession circle and microphone is compressed, and reaches sealing effect; Standard O type circle 5 and wedge-type seal collar 2 are imbedded in the mounting hole of microphone assembly wall 1; Microphone 3 is inserted in microphone grill-protected shell 4; in the mounting hole of microphone grill-protected shell 4 Probe microphone assembly walls 1; threaded together precession circle 6; by screw thread, tighten thrust; make by standard O type circle 5 and wedge-type seal collar 2, to compress between microphone assembly wall 1 and microphone grill-protected shell 4, reach sealing effect.
A kind of two sections of sealing machine structures for the calibration of high sound pressure microphone as above, the wall thickness of the microphone assembly wall described in it is 10～30mm.
A kind of two sections of sealing machine structures for the calibration of high sound pressure microphone as above, the internal diameter of the standard O type circle described in it is 7.0～13.2mm, external diameter is 10.0～18.0mm.
A kind of two sections of sealing machine structures for the calibration of high sound pressure microphone as above, the internal diameter of the wedge-type seal collar described in it is 7.0～13.2mm, and external diameter is 11.0～19.0mm, and thickness is 3～5mm, wedge angle is 45 degree, and the wedge-shaped impression degree of depth is 1.0～1.5mm.
A kind of two sections of sealing machine structures for the calibration of high sound pressure microphone as above, the internal diameter of the screw thread precession circle described in it is 6.9～13.2mm, major diameter of thread is 13～21mm, thread depth pitch is 0.1～0.4mm, reach is 5～10mm, annular knurl outer shroud external diameter is 20～35mm, and thickness is 3～5mm.
A kind of two sections of sealing machine structures for the calibration of high sound pressure microphone as above, the internal diameter of the special-shaped O type circle (7) described in it is 6.5～13.2mm, and external diameter is 8.0～18.0mm, and outside is semicircular arc, inner side is ellipse arc, and major axis minor axis ratio is 5～3.
Effect of the present utility model is: a kind of microphone sealing machine structure of the present invention, microphone position can be fixed, and microphone axis and mounting hole axis are not offset, and double-layer sealing structure reduces pressure leakages rate.Leading portion sealing compresses O type circle by sealing collar and realizes, and sealing collar adopts wedge-shaped design, and axial pressure can inwardly be compressed O type circle, makes it to be adjacent to mounting hole and microphone grill-protected shell, and keeps certain pressure to play the effect of sealing.The axial pressure of leading portion sealing comes from the pressure of the screw thread precession circle of back segment sealing, for avoiding driving leading portion O type circle to rotate in back segment sealing precession process, the employing split design of two sections of front and back.Back segment sealing adopts special-shaped O type circle to realize; special-shaped O type circle and the microphone of the sealing of precession process posterior segment closely cooperate; can play the effect of supporting microphone; make the stable fixed position that keeps of microphone; and when screw thread precession collar is installed for turning clockwise; the precession direction that its grill-protected shell is installed with microphone is identical, and the frictional force of special-shaped O type circle and microphone can assist microphone to screw installation.
Accompanying drawing explanation
Fig. 1 is microphone calibration mounting structure schematic diagram.
Fig. 2 is a kind of two sections of sealing machine structural representations for the calibration of high sound pressure microphone described in the utility model;
In figure: 1---microphone assembly wall; 2---wedge-type seal collar; 3---microphone; 4---microphone grill-protected shell; 5---standard O type circle; 6---screw thread precession circle; 7---special-shaped O type circle; 8---microphone preamplifier.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone described in the utility model are further described.
As shown in Figure 2, a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone described in the utility model, sealing problem when it adopts two sections of sealing means to solve the calibration of high sound pressure microphone.Its forward end seal comprises standard O type circle 5 and wedge-type seal collar 2, and back segment sealing comprises special-shaped O type circle 7 and screw thread precession circle 6.
Wherein, special-shaped O type circle 7 embeds in the groove of screw thread precession circle 6, after microphone preamplifier 8 is connected with microphone 3, inserts in the mounting hole of screw thread precession circle 6, and the special-shaped O type circle 7 between screw thread precession circle 6 and microphone 3 is compressed, and reaches sealing effect.Standard O type circle 5 and wedge-type seal collar 2 are imbedded in the mounting hole of microphone assembly wall 1; Microphone 3 is inserted in microphone grill-protected shell 4; in the mounting hole of microphone grill-protected shell 4 Probe microphone assembly walls 1; threaded together precession circle 6; by screw thread, tighten thrust; make by standard O type circle 5 and wedge-type seal collar 2, to compress between microphone assembly wall 1 and microphone grill-protected shell 4, reach sealing effect.
The wall thickness of described microphone assembly wall 1 is 10～30mm.
The internal diameter of described standard O type circle 5 is 7.0～13.2mm, and external diameter is 10.0～18.0mm.
The internal diameter of described wedge-type seal collar 2 is 7.0～13.2mm, and external diameter is 11.0～19.0mm, and thickness is 3～5mm, and wedge angle is 45 degree, and the wedge-shaped impression degree of depth is 1.0～1.5mm.
The internal diameter of described screw thread precession circle 6 is 6.9～13.2mm, and major diameter of thread is 13～21mm, and thread depth pitch is 0.1～0.4mm, and reach is 5～10mm, and annular knurl outer shroud external diameter is 20～35mm, and thickness is 3～5mm.
The internal diameter of described special-shaped O type circle 7 is 6.5～13.2mm, and external diameter is 8.0～18.0mm, and outside is semicircular arc, and inner side is ellipse arc, and major axis minor axis ratio is 5～3.
A kind of two sections of sealing machine structure installation steps for the calibration of high sound pressure microphone described in the utility model are as follows:
(a) special-shaped O type circle 7 is embedded in the groove of screw thread precession circle 6;
(b) after microphone preamplifier 8 and microphone 3 are connected, insert in the mounting hole of screw thread precession circle 6, the special-shaped O type circle 7 between screw thread precession circle 6 and microphone 3 is compressed, reach sealing effect;
(c) microphone 3 is inserted in microphone grill-protected shell 4, makes the complete working state that reaches of microphone combination;
(d) successively standard O type circle 5 and wedge-type seal collar 2 are imbedded in the mounting hole of microphone assembly wall 1;
(e) by the mounting hole of microphone grill-protected shell 4, microphone 3, screw thread precession circle 6, special-shaped O type circle 7, microphone preamplifier 8 composite structure Probe microphone assembly walls 1, keep the end face of microphone grill-protected shell 4 concordant with the internal face of microphone assembly wall 1, threaded together precession circle 6, by screw thread, tighten thrust, wedge-type seal collar 2 is moved in hole, compression standard O type circle 5, makes by standard O type circle 5, to reach sealing effect between microphone assembly wall 1 and microphone grill-protected shell 4;
(f) now sealing configuration installs, and realizes the double-layer seal of standard O type circle 5 and special-shaped O type circle 7, and the dead in line that can keep axis and the mounting hole of microphone improves microphone installation precision.
Claims (6)
1. for two sections of sealing machine structures of high sound pressure microphone calibration, it is characterized in that: its forward end seal comprises standard O type circle (5) and wedge-type seal collar (2), back segment sealing comprises special-shaped O type circle (7) and screw thread precession circle (6);
Wherein, abnormity O type circle (7) embeds in the groove of screw thread precession circle (6), after microphone preamplifier (8) is connected with microphone (3), insert in the mounting hole of screw thread precession circle (6), special-shaped O type circle (7) between screw thread precession circle (6) and microphone (3) is compressed, reach sealing effect;
Standard O type circle (5) and wedge-type seal collar (2) are imbedded in the mounting hole of microphone assembly wall (1); Microphone (3) is inserted in microphone grill-protected shell (4); in the mounting hole of microphone grill-protected shell (4) Probe microphone assembly wall (1); threaded together precession circle (6); by screw thread, tighten thrust; make by standard O type circle (5) and wedge-type seal collar (2), to compress between microphone assembly wall (1) and microphone grill-protected shell (4), reach sealing effect.
2. a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone according to claim 1, is characterized in that: the wall thickness of described microphone assembly wall (1) is 10～30mm.
3. a kind of two sections of sealing machine structures for the calibration of high sound pressure microphone according to claim 1, is characterized in that: the internal diameter of described standard O type circle (5) is 7.0～13.2mm, and external diameter is 10.0～18.0mm.
4. a kind of two sections of sealing machine structures for high sound pressure microphone calibration according to claim 1, it is characterized in that: the internal diameter of described wedge-type seal collar (2) is 7.0～13.2mm, external diameter is 11.0～19.0mm, thickness is 3～5mm, wedge angle is 45 degree, and the wedge-shaped impression degree of depth is 1.0～1.5mm.
5. a kind of two sections of sealing machine structures for high sound pressure microphone calibration according to claim 1, it is characterized in that: the internal diameter of described screw thread precession circle (6) is 6.9～13.2mm, major diameter of thread is 13～21mm, thread depth pitch is 0.1～0.4mm, reach is 5～10mm, annular knurl outer shroud external diameter is 20～35mm, and thickness is 3～5mm.
6. a kind of two sections of sealing machine structures for high sound pressure microphone calibration according to claim 1, it is characterized in that: the internal diameter of described special-shaped O type circle (7) is 6.5～13.2mm, external diameter is 8.0～18.0mm, outside is semicircular arc, inner side is ellipse arc, and major axis minor axis ratio is 5～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320491431.3U CN203463653U (en) | 2013-08-13 | 2013-08-13 | Two-section seal mechanical structure for high pressure microphone calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320491431.3U CN203463653U (en) | 2013-08-13 | 2013-08-13 | Two-section seal mechanical structure for high pressure microphone calibration |
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| Publication Number | Publication Date |
|---|---|
| CN203463653U true CN203463653U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320491431.3U Expired - Lifetime CN203463653U (en) | 2013-08-13 | 2013-08-13 | Two-section seal mechanical structure for high pressure microphone calibration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101028A (en) * | 2014-04-22 | 2015-11-25 | 钰太芯微电子科技（上海）有限公司 | Test tool for acoustic calibration |
-
2013
- 2013-08-13 CN CN201320491431.3U patent/CN203463653U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101028A (en) * | 2014-04-22 | 2015-11-25 | 钰太芯微电子科技（上海）有限公司 | Test tool for acoustic calibration |
| CN105101028B (en) * | 2014-04-22 | 2019-01-29 | 钰太芯微电子科技（上海）有限公司 | Acoustic calibration's test fixture |
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| GR01 | Patent grant | ||
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Granted publication date: 20140305 |
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| CX01 | Expiry of patent term |