CN208206380U - A kind of pressure sensor - Google Patents
A kind of pressure sensor Download PDFInfo
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- CN208206380U CN208206380U CN201820826849.8U CN201820826849U CN208206380U CN 208206380 U CN208206380 U CN 208206380U CN 201820826849 U CN201820826849 U CN 201820826849U CN 208206380 U CN208206380 U CN 208206380U
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Abstract
The utility model provides a kind of pressure sensor, equipped with lower case and upper housing, lower case lower end is equipped with pressure tracting pressuring hole, cell pressure core is equipped with inside lower case upper end, cell pressure core upper end is equipped with compression ring, compression ring jam sensor pressure core, cell pressure core and pressure tracting pressuring hole and pressure sensitive area are to be tightly connected, pressure buffer ring is equipped between pressure sensitive area and pressure tracting pressuring hole, pressure buffer ring is equipped with pressure water conservancy diversion buffer damping hole, pressure buffer ring bottom is equipped with pressure and reflects buffering suface, which solve existing marine diesels during operation, lubricating oil pressure pulse shock to marine diesel pressure sensor, fatigue load fluctuation impact, mechanical oscillation impact and temperature shock, the technical issues of causing pressure sensor core detection accuracy to decline and fail.The utility model can be widely applied to pressure sensor, be particularly suitable for marine diesel pressure sensor.
Description
Technical field
The utility model relates to a kind of pressure sensor apparatus, more particularly to a kind of pressure sensor.
Background technique
Marine diesel is a kind of special for diesel engine, the diesel engine of mostly large-scale power, generally to fishing boat and transport cargo ship
Mating, in several hundred horsepower, it is higher generally to transport the marine diesel power that cargo ship uses for the matched marine diesel power of fishing boat.
This diesel engine is all mounted on inside cabin, and as the navigating power of steamer, maintainability is extremely important, so transporting
The parameters for needing instrument monitoring diesel engine to operate in row, including revolving speed, temperature and pressure parameter, wherein for pressure parameter
Monitoring mainly realized using marine diesel pressure sensor to the pressure detecting of lubricating oil, if the pressure of lubricating oil cannot
Meet the operating parameters requirement of marine diesel, then diesel engine will appear abrasion and damage, or even serious failure occur can not
Operating.
Existing marine diesel pressure sensor is generally all mounted on the body of marine diesel, marine diesel pressure
Signal is passed to instrument by the lubricating oil pressure in detection diesel-engine body by force snesor, instrument realize pressure monitoring and
Alarm.The environment of marine diesel installation is most of all to there are the factors such as greasy dirt, dust, moisture, vibration due in cabin,
Working environment and operating condition are severe, and the influence for marine diesel pressure sensor mainly has following several respects:
(1) for marine diesel in starting and shutdown, very big fluctuation can all occur in lubricating oil pressure, in signal piping
Formation instantaneous pressure pulse, the cell pressure core for the pulse shock pressure sensor inside that this moment generates, often
Cause stress the damage of the presser sensor electric bridge on core.
(2) in the running, a lubricating oil pressure not instead of stable pressure value is in continuous earthwave to marine diesel
Dynamic state, the continuous fluctuation of oil pressure constantly form fatigue impact to pressure core sensing element, and this fatigue impact is right for a long time
Presser sensor electric bridge in pressure core forms fatigue load, cause presser sensor electric bridge in pressure core can prematurely because
The impact of fatigue load causes accuracy decline, or even failure.
(3) marine diesel during operation, can generate very big mechanical oscillation, the machinery that this mechanical oscillation generate
Impact can pass to pressure sensor, also can form vibratory impulse to the electronic circuit inside pressure sensor core, have
A little electronic circuits cause device to fall off, circuit malfunction because constantly being impacted by mechanical oscillation, eventually lead to pressure biography
Sensor detection accuracy reduces, and test error is big, and some pressure sensors directly fail, and cannot achieve detection.
(4) operating of marine diesel can generate very high temperature, cause the temperature of diesel-engine body very high, can generally reach
To 80 DEG C -100 DEG C or so, such heat can also pass to pressure sensor, lead to the temperature of pressure sensor inside also very
Height, this high temperature will cause temperature shock for pressure sensor core, lead to the electronic circuit member device of pressure sensor inside
The impact of part and presser sensor electric bridge by temperature, constantly high/low-temperature impact, can also reduce the electronic circuit of sensor internal
The service life of component and presser sensor electric bridge.
Utility model content
The utility model seeks to solve existing marine diesel during operation, to marine diesel pressure sensor
Lubricating oil pressure pulse shock, fatigue load fluctuation impact, mechanical oscillation impact and temperature shock, lead to pressure sensor core
The technical issues of accuracy decline and failure, is surveyed in physical examination, provides a kind of resistance to lubricating oil pressure pulse shock, the punching of endurance load fluctuation
It hits, the pressure sensor of mechanical resistant vibratory impulse and temperature shock.
For this purpose, the technical solution of the utility model is, a kind of pressure sensor is equipped with lower case and upper housing, lower case
Lower end is equipped with pressure tracting pressuring hole, and cell pressure core is equipped with inside lower case upper end, and cell pressure core bottom is equipped with pressure
Power induction zone, pressure sensitive area are connected with pressure tracting pressuring hole, and cell pressure core upper end is equipped with compression ring, and compression ring compresses
Cell pressure core, cell pressure core and pressure tracting pressuring hole and pressure sensitive area are to be tightly connected, main structure
It is that pressure buffer ring is equipped between pressure sensitive area and pressure tracting pressuring hole, pressure buffer ring is equipped with the buffering resistance of pressure water conservancy diversion
Buddhist nun hole, pressure buffer ring bottom are equipped with pressure and reflect buffering suface.
Preferably, pressure buffer ring is with certain thickness disc-shape, and the pressure buffer ring of disc-shape is equipped with
Pressure water conservancy diversion buffer damping hole, the plane of the pressure buffer ring of disc-shape are that pressure reflects buffering suface.
Preferably, pressure buffer is equipped with support portion, is connected on the inside of support portion and is equipped with pressure buffer release cavity, and pressure is slow
Punching release cavity upper end is equipped with pressure and reflects buffering suface, and pressure reflects buffering suface and is equipped with pressure water conservancy diversion buffer damping hole.
Preferably, pressure refraction buffering suface is plane or Surface of Sphere.
Preferably, pressure refraction buffering suface is that the support portion medial surface being equipped with by pressure buffer and pressure reflect buffering suface
It is continuously coupled, the Surface of Sphere of complete integral shape is formed, the another side that Surface of Sphere is located at pressure sensitive area side is also Surface of Sphere.
Preferably, the pressure water conservancy diversion buffer damping hole that pressure refraction buffering suface is equipped with is located at pressure tracting pressuring hole and rolls in pressure
The outside in the upright projection region on buffering suface is penetrated, the pressure oil in pressure tracting pressuring hole enters pressure buffer release inside cavity and hits
When hitting pressure refraction buffering suface, refraction can be sprung back, then could enter pressure sensitive by pressure water conservancy diversion buffer damping hole
In area.
Preferably, pressure tracting pressuring hole is equipped with pressure water conservancy diversion buffer area, pressure water conservancy diversion buffer area close to pressure buffer ring side
The pressure buffer for forming greater room with the pressure buffer release cavity on pressure buffer ring discharges cavity.
Preferably, pressure tracting pressuring hole is the conical cavity bodily form close to the pressure water conservancy diversion buffer area that pressure buffer ring side is equipped with
The pressure buffer release cavity being equipped with that is connected on the inside of shape, circular cone cavity great circle one end and the support portion of pressure buffer ring is connected, pressure
The female cone cavity inner surface of power water conservancy diversion buffer area is that pressure water conservancy diversion discharges inclined-plane, and pressure tracting pressuring hole is close to pressure buffer ring side
The pressure buffer release cavity being equipped with that is connected on the inside of the pressure water conservancy diversion buffer area for the circular cone cavity geometry being equipped with and support portion is formed
The pressure buffer of greater room discharges cavity.
Preferably, pressure tracting pressuring hole is the inner circle spherical cavity bodily form close to the pressure water conservancy diversion buffer area that pressure buffer ring side is equipped with
The pressure buffer release cavity being equipped with that is connected on the inside of shape, inner circle spherical cavity body great circle side and the support portion of pressure buffer ring is connected,
The female cone cavity inner surface of pressure water conservancy diversion buffer area is that pressure water conservancy diversion discharges inclined-plane, and it is spheric that pressure water conservancy diversion, which discharges inclined-plane,
Shape, pressure tracting pressuring hole is in the pressure water conservancy diversion buffer area for the inner circle spherical cavity shape that pressure buffer ring side is equipped with and support portion
The connected pressure buffer release cavity being equipped in side forms continuous interior spheroid shape, and pressure tracting pressuring hole is close to pressure buffer ring side
The pressure buffer being equipped with that is connected on the inside of the pressure water conservancy diversion buffer area for the inner circle spherical cavity shape being equipped with and support portion discharges cavity shape
Cavity is discharged at the pressure buffer of greater room.
Preferably, pressure buffer ring outer circle side is equipped with sealing ring and supports cancave cambered surface, and sealing ring support cancave cambered surface is connected
There is sealing ring, inner periphery and the sealing ring support cancave cambered surface of sealing ring link together.
The utility model beneficial effect is, due to a kind of pressure sensor, between pressure sensitive area and pressure tracting pressuring hole
Equipped with pressure buffer ring, pressure buffer ring is equipped with pressure water conservancy diversion buffer damping hole, and marine diesel is in starting and shutdown, to the greatest extent
Very big fluctuation can all occur in pipe lubricating oil pressure, and instantaneous pressure pulse, the arteries and veins that this moment generates are formed in signal piping
It hits in a state of excitement, when marine diesel lubricating oil being made to enter pressure sensitive area through excess pressure tracting pressuring hole, will receive the slow of pressure buffer ring
Punching after all capable of springing back refraction, could pass through pressure water conservancy diversion when the lubricating oil of dai channel stamping press strikes pressure refraction buffering suface
Buffer damping hole slowly enters in pressure sensitive area, will not be formed and be impacted to presser sensor electric bridge bottom surface, to protect pressure
The validity and reliability of sensitive electric bridge；If the pressure sensor of traditional structure is not due to having pressure buffer ring, lubricating oil arteries and veins
It hits and is entered directly into pressure sensitive area in a state of excitement, be directly impinging presser sensor electric bridge bottom surface, the stress of this impact can be to pressure
Power sensitivity electric bridge causes impact failure and pressure sensor is caused to fail.
When marine diesel in the running, a lubricating oil pressure not instead of stable pressure value, be in continuous earthwave
Dynamic state, the continuous fluctuation of oil pressure constantly form fatigue impact to pressure core sensing element, and this fatigue impact is right for a long time
Presser sensor electric bridge in pressure core forms fatigue load, cause presser sensor electric bridge in pressure core can prematurely because
The impact of fatigue load causes accuracy decline, or even failure；But the pressure sensor of such structure, due to pressure buffer ring
It is equipped with pressure water conservancy diversion buffer damping hole, the lubricating oil in pressure tracting pressuring hole flows mutually with the lubricating oil in pressure sensitive area
When, damping force can be generated, in this way, the continuous fluctuation of oil pressure will not cause stress springing up back and forth for the lubricating oil in induction zone,
Fatigue impact will not be caused to presser sensor electric bridge, presser sensor electric bridge not will form fatigue load, can guarantee presser sensor electricity
The long-time stability of bridge and long service life, guarantee the stability of pressure test precision.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment 1；
Fig. 2 is the structural schematic diagram of the utility model embodiment 2；
Fig. 3 is the structural schematic diagram of the utility model embodiment 3；
Fig. 4 is the structural schematic diagram of the utility model embodiment 4；
Fig. 5 is the structural schematic diagram of the utility model embodiment 5；
Fig. 6 is the structural schematic diagram of the utility model pressure buffer ring embodiment 1；
Fig. 7 is the structural schematic diagram of the utility model pressure buffer ring embodiment 2；
Fig. 8 is structural schematic diagram of the utility model pressure buffer ring in conjunction with sealing ring；
Fig. 9 is the structural schematic diagram of the utility model pressure buffer ring rear compressive state in conjunction with sealing ring；
Figure 10 is the structural schematic diagram of the utility model pressure buffer ring embodiment 3；
Figure 11 is the structural schematic diagram of the utility model pressure buffer ring embodiment 4；
Figure 12 is the structural schematic diagram of the utility model pressure buffer ring compression buffering water conservancy diversion damping hole；
Figure 13 is the present invention looks up structural representation of the utility model pressure buffer ring compression buffering water conservancy diversion damping hole；
Figure 14 is another structural schematic diagram of the utility model pressure buffer ring compression buffering water conservancy diversion damping hole；
Figure 15 is the present invention looks up structural representation of the utility model pressure buffer ring compression buffering water conservancy diversion damping hole.
Symbol description in figure:
1. lower case；2. pressure buffer ring；3. sealing ring；4. cell pressure core；5. compression ring；6. upper housing；7.
Aviation plug；8. pressure tracting pressuring hole；9. pressure buffer water conservancy diversion damping hole；10. pressure buffer discharges cavity；11. pressure water conservancy diversion is slow
Rush area；12. pressure water conservancy diversion discharges inclined-plane；13. pressure sensitive area；14. electronic circuit；15. presser sensor electric bridge；16. elastic cushion；
17. support portion；18. pressure reflects buffering suface.
Specific embodiment
The utility model is described further below with reference to embodiment.
Embodiment 1
It is a kind of a kind of embodiment of pressure sensor of the utility model, a kind of pressure as shown in Fig. 1, Fig. 7, Fig. 8, Fig. 9
Sensor is equipped with lower case 1 and upper housing 6, and 6 upper end of upper housing is equipped with aviation plug 7, and 1 lower end of lower case is equipped with pressure impulse
Hole 8,6 upper end of lower case inside are equipped with cell pressure core 4, and cell pressure core 4 is equipped with presser sensor electric bridge 15, pass
Electronic circuit 14 is additionally provided in sensor pressure core 4, presser sensor electric bridge 15 is electrically connected with electronic circuit 14, cell pressure core
4 bottom of body is equipped with pressure sensitive area 13, and pressure sensitive area 13 is connected with pressure tracting pressuring hole 8, and 4 upper end of cell pressure core is set
There are compression ring 5,5 jam sensor pressure core 4 of compression ring, cell pressure core 4 and pressure tracting pressuring hole 8 and pressure sensitive area
13 is are tightly connected, and pressure buffer ring 2 are equipped between pressure sensitive area 13 and pressure tracting pressuring hole 8, pressure buffer ring 2 is equipped with
Pressure water conservancy diversion buffer damping hole 9,2 bottom of pressure buffer ring are equipped with pressure and reflect buffering suface 18.
Due to being equipped with pressure buffer ring 2 between pressure sensitive area 13 and pressure tracting pressuring hole 8, pressure buffer ring 2 is equipped with
Pressure water conservancy diversion buffer damping hole 9, marine diesel is in starting and shutdown, although very big wave can all occur in lubricating oil pressure
It is dynamic, instantaneous pressure pulse is formed in signal piping, the pulse shock that this moment generates passes through marine diesel lubricating oil
When pressure tracting pressuring hole 8 enters pressure sensitive area 13, the buffering of pressure buffer ring 2 will receive, the lubricating oil of dai channel stamping press is hit
When reflecting buffering suface 18 to pressure, after all capable of springing back refraction, pressure water conservancy diversion buffer damping hole 9 could be passed through and slowly enter pressure
In power induction zone 13,15 bottom surface of presser sensor electric bridge will not be formed and be impacted, to protect the validity of presser sensor electric bridge 15
And reliability；If the pressure sensor of traditional structure is since without pressure buffer ring 2, lubricating oil pulse shock is entered directly into
In pressure sensitive area 13, it is directly impinging 15 bottom surface of presser sensor electric bridge, the stress of this impact can be to presser sensor electric bridge 15
It causes impact failure and pressure sensor is caused to fail.
Fig. 7 is a kind of structural schematic diagram of pressure buffer ring 2, can be seen that pressure buffer ring 2 in figure and is equipped with support portion
17, support portion 17 supports cell pressure core 4, forms preload pressure, and fixed cell pressure core 4 forms stable consolidate
It is fixed, it is connected on the inside of support portion 17 and is equipped with pressure buffer release cavity 10, pressure buffer discharges 10 upper end of cavity and reflects equipped with pressure
Buffering suface 18, pressure reflect buffering suface 18 be equipped with pressure water conservancy diversion buffer damping hole 9, when pressure oil by pressure tracting pressuring hole 8 into
Fashionable, the impact of pressure oil can strike on pressure refraction buffering suface 18, the pressure oil meeting hit by pressure refraction buffering suface 18
Refraction rebound occurs, realizes the buffering of pressure oil, realizes the pressure release of pressure oil, the pressure oil after being released is led by pressure again
Stream buffer damping hole 9 stably enters inside pressure sensitive area 13, and the pressure oil for being released pressure in this way will not be quick to pressure
Inductance bridge 15 causes pulse shock, can protect the service life of presser sensor electric bridge 15 and the stability of detection signal, pressure well
Water conservancy diversion buffer damping hole 9 also can provide damping force to entering for pressure oil, can also protect pressure oil for presser sensor electricity again
The pressure signal of pressure oil is changed into electric signal and is transmitted to electronic circuit 14, electronic circuit by the impact of bridge 15, presser sensor electric bridge 15
14 electronic signal is improved after instrument and meter is passed to by aviation plug 7 again, realize the acquisition of signal.
It can be seen that, 2 outer circle side of pressure buffer ring is equipped with sealing ring and supports cancave cambered surface 19, sealing in Fig. 7, Fig. 8, Fig. 9
The inner periphery of circle 3 links together with sealing ring support cancave cambered surface 19, and sealing ring supports cancave cambered surface 19 that sealing ring 3 is fixed
Firmly, in this way in large batch of Operational preparation, it can be used as individual component and be ready to, flexible organization production can also will be close
3 inner periphery of seal bonds together with sealing ring support cancave cambered surface 19, forms a component, sealing ring 3 can be located at sealing ring
The central plane of cancave cambered surface 19 is supported, 3 upper and lower surface of sealing ring is symmetrical relative to the central plane of sealing ring support cancave cambered surface 19,
In this way in sealing, when cell pressure core 4 compresses sealing ring 3, the compressed amount of the sealing ring 3 of arrangement symmetrical above and below is equal
Even, when sealing ring 3 is chronically at compression seal state, stress is also uniformly that the good seal performance of sealing ring 3, service life are long, root
Decrement is controlled the range in 20-30%, leakproofness and longest-lived by the empirical data factually tested.
Fig. 8 is the combination diagram of pressure buffer ring 2 and sealing ring 3, and sealing ring 3 is the state before compression, it can be seen that
3 upper and lower surface of sealing ring is symmetrical relative to the central plane of sealing ring support cancave cambered surface 19, which can be by 3 inner circle of sealing ring
Week bonds together with sealing ring support cancave cambered surface 19, forms independent component, does for the production of large batch of pressure sensor
Prepare.
Fig. 9 is the compressed status diagram of combination of pressure buffer ring 2 and sealing ring 3, it can be seen that cell pressure
When core 4 compresses sealing ring 3, the compressed amount of the sealing ring 3 of arrangement symmetrical above and below is uniformly that leakproofness and service life are long.
Embodiment 2
Fig. 2, Fig. 6 are a kind of another embodiments of pressure sensor of the utility model, and Fig. 2 is the assembly of pressure sensor
Structural schematic diagram, Fig. 6 are the structural schematic diagrams of pressure buffer ring 2, and unlike the first embodiment, pressure buffer ring 2 is with one
Determine the disc-shape of thickness, the pressure buffer ring 2 of disc-shape is equipped with pressure water conservancy diversion buffer damping hole 9, pressure buffer ring 2
Plane is that pressure reflects buffering suface 18, and pressure tracting pressuring hole 8 is equipped with pressure water conservancy diversion buffer area 11, pressure close to 2 side of pressure buffer ring
When power oil enters through excess pressure tracting pressuring hole 8, first passes around pressure water conservancy diversion buffer area 11 and buffered, also achieve releasing for pressure
It puts, while pressure oil can also strike and form rebound on pressure refraction buffering suface 18, further release stress, be released pressure
Pressure oil is entered inside pressure sensitive area 13 by pressure water conservancy diversion buffer damping hole 9 again, realizes the detection of pressure.
Meanwhile 2 structure of pressure buffer ring of disc-shape is simple, and manufacturing cost is low, and it is easy for installation, it can be applied to similar
The pressure sensor inside of type improves the measuring accuracy of pressure sensor, extends the service life of pressure sensor.
Embodiment 3
Fig. 3 is a kind of another embodiment of pressure sensor of the utility model, it can be seen that pressure tracting pressuring hole 8 is close
2 side of pressure buffer ring is equipped with pressure water conservancy diversion buffer area 11, the pressure buffer on pressure water conservancy diversion buffer area 11 and pressure buffer ring 2
It discharges cavity 10 and forms the pressure buffer of greater room and discharge cavity, in the present embodiment, pressure tracting pressuring hole 8 is close to pressure buffer ring
The pressure water conservancy diversion buffer area 11 that 2 sides are equipped with is circular cone cavity geometry, the support of circular cone cavity great circle one end and pressure buffer ring 2
The pressure buffer release cavity 10 being equipped with that is connected on the inside of portion 17 is connected, and the female cone cavity inner surface of pressure water conservancy diversion buffer area 11 is
Pressure water conservancy diversion discharges inclined-plane 12, the pressure water conservancy diversion for the circular cone cavity geometry that pressure tracting pressuring hole 8 is equipped with close to 2 side of pressure buffer ring
The pressure buffer release cavity 10 being equipped with that is connected on the inside of buffer area 11 and support portion 17 forms the pressure buffer release of greater room
Cavity, the female cone cavity inner surface of pressure water conservancy diversion buffer area 11 are that pressure water conservancy diversion discharges inclined-plane 12, the meeting of such water conservancy diversion inclined-plane
The fluid of pressure oil is functioned well as into guide functions, can preferably compensator or trimmer pressure oil pressure.
Embodiment 4
Fig. 4, Figure 10 are a kind of another embodiments of pressure sensor of the utility model, be can see in figure, pressure folding
Penetrating buffering suface 18 is Surface of Sphere, and pressure reflects the Surface of Sphere design of buffering suface 18, will can preferably strike pressure refraction buffering
The pressure oil of 18 inner surface of face is sprung back, and forms umbrella refraction, realizes disturbance flexible, buffering to the pressure oil with pulse
It is more preferable with the effect of pressure release, meanwhile, in Fig. 4 it can further be seen that pressure water conservancy diversion buffer area 11 is inner circle spherical cavity shape, also can be real
The Surface of Sphere of flexible guide and pressure refraction buffering suface 18 when existing pressure oil enters reflects to form uniform buffering and pressure release,
It is more suitable for the buffering of the fluid flowing and pressure of pressure oil, preferably protection presser sensor electric bridge 15, pressure test is more stable.
It can be seen that, the pressure water conservancy diversion buffer damping hole 9 that pressure refraction buffering suface 18 is equipped with is median pore radius in Figure 10
Shape small, pressure oil disengaging aperture is big can again eliminate the pulse of pressure oil, realize that pressure oil steadily enters pressure sensitive
Inside area 13.
Embodiment 5
Fig. 5, Figure 11 are a kind of another embodiments of pressure sensor of the utility model, be can see in Fig. 5, pressure is drawn
Pressure hole 8 is inner circle spherical cavity shape, inner circle spherical cavity body great circle close to the pressure water conservancy diversion buffer area 11 that 2 side of pressure buffer ring is equipped with
The pressure buffer release cavity 10 being equipped with that is connected on the inside of side and the support portion 17 of pressure buffer ring 2 is connected；It can be seen in Figure 11
It arrives, it is 17 medial surface of support portion being equipped with by pressure buffer ring 2 that the pressure refraction buffering suface 18 of pressure buffer ring 2, which is Surface of Sphere,
It is continuously coupled with pressure refraction buffering suface 18, form the Surface of Sphere of complete integral shape；The female cone of pressure water conservancy diversion buffer area 11
Cavity inner surface is that pressure water conservancy diversion discharges inclined-plane 12, and it is spherical shape that pressure water conservancy diversion, which discharges inclined-plane 12, and pressure tracting pressuring hole 8 is close to pressure
Be connected the pressure being equipped on the inside of the pressure water conservancy diversion buffer area 11 for the inner circle spherical cavity shape that 2 side of power buffering ring is equipped with and support portion 17
Power buffering release cavity 10 forms continuous interior spheroid shape, the inner circle that pressure tracting pressuring hole 8 is equipped with close to 2 side of pressure buffer ring
The pressure buffer release cavity 10 being equipped with that is connected on the inside of the pressure water conservancy diversion buffer area 11 of spherical cavity shape and support portion 17 is formed more
The pressure buffer of large space discharges cavity.
The structure of this complete integral shape Surface of Sphere designs, can be preferably by the pressure oil for having pulse and unstable
The pressure oil of pressure carries out disturbance flexible, forms the buffering of ball inner cavity, is not in secondary pulse, buffers and let out
Press effect more preferable, the another side that Surface of Sphere is located at pressure sensitive area side is also Surface of Sphere, into the pressure in pressure sensitive area 13
Oil also will form the state of dispersion, smaller for the impact of presser sensor electric bridge 15, the induction test pressure of presser sensor electric bridge 15
When, more stable, the long-time stability of presser sensor electric bridge 15 are more preferable, and the drift of circuit is smaller, the longer life expectancy of sensor.
It can further be seen that the pressure water conservancy diversion buffer damping hole 9 that pressure refraction buffering suface 18 is equipped with is located at pressure in Figure 11
Tracting pressuring hole 8 reflects the outside in the upright projection region on buffering suface 18 in pressure, and the pressure oil in pressure tracting pressuring hole 8 enters pressure
When buffering release 10 inner impact of cavity reflects buffering suface 18 to pressure, refraction can be sprung back, it then could be slow by pressure water conservancy diversion
It rushes damping hole 9 to enter in pressure sensitive area 13, this design, when pressure oil enters, directly impinges pressure refraction buffering suface
On 18, the part directly hit is not provided with pressure water conservancy diversion buffer damping hole 9, can all spring back pressure oil, will not directly let out
It drains in pressure sensitive area 13, the pressure that 18 periphery of pressure refraction buffering suface is set can only could be passed through after superrefraction buffers
Water conservancy diversion buffer damping hole 9 enters in pressure sensitive area 13, is formed and is protected to presser sensor electric bridge 15.
It can further be seen that 9 section of pressure water conservancy diversion buffer damping hole that pressure refraction buffering suface 18 is equipped with is cone in Figure 11
The pressure water conservancy diversion buffer damping hole 9 of shape face shape or spherical shape, tapered surface shape or spherical shape can allow more stablely
Pressure oil passes through, will not generate again pulse ripple, especially 9 section of pressure water conservancy diversion buffer damping hole be spherical shape when,
The flowing of pressure oil is more stable.
Embodiment 6
Figure 12, Figure 13, Figure 14, Figure 15 are the three dimensional structure diagrams of the various embodiments of the utility model pressure buffer ring 2,
It can be seen that the pressure water conservancy diversion buffer damping hole 9 that pressure refraction buffering suface 18 is equipped with is umbrella distribution, pressure reflects buffering suface
The 18 pressure water conservancy diversion buffer damping holes 9 being equipped with are round hole or strip hole, provide reasonable damping also for pressure oil
Power, while realizing the drainage in fluid difference channel, realize that pressure oil is entered inside pressure sensitive area 13 by periphery, because of pressure
Sensitive electric bridge 15 is typically located at the intermediate position of cell pressure core 4, so this pressure oil is directed by periphery
It inside pressure sensitive area 13, is more avoided that presser sensor electric bridge 15 is impacted, prolongs the service life, can also improve detection essence
Degree.
Pressure water conservancy diversion buffer damping hole 9 can reflect buffering suface 18 perpendicular to pressure, can preferably guide pressure oil it is steady
Ground enters inside pressure sensitive area 13.
When marine diesel in the running, a lubricating oil pressure not instead of stable pressure value, be in continuous earthwave
Dynamic state, the continuous fluctuation of oil pressure constantly form fatigue impact to pressure core sensing element, and this fatigue impact is right for a long time
Presser sensor electric bridge 15 on cell pressure core 4 forms fatigue load, leads to the presser sensor electric bridge meeting in pressure core
Prematurely because of the impact of fatigue load, accuracy decline, or even failure are caused；But the pressure sensor of such structure, due to
Pressure buffer ring 2 is equipped with pressure water conservancy diversion buffer damping hole 9, the profit in lubricating oil and pressure sensitive area in pressure tracting pressuring hole 8
When lubricating oil flows mutually, damping force can be generated, in this way, the continuous fluctuation of oil pressure will not cause stress the lubricating oil in induction zone 13
Spring up back and forth, when the diesel lubrication oil pressure of test fluctuates, profit when pressure instantaneously reduces, in pressure sensitive area 13
Lubricating oil will not flow as quickly out 13 outside of pressure sensitive area, when test due to the presence in pressure water conservancy diversion buffer damping hole 9
Diesel lubrication oil pressure fluctuates, and when pressure instantaneously improves, the lubricating oil in pressure tracting pressuring hole 8 is due to pressure water conservancy diversion buffering
The presence of damping hole 9 will not rapidly flow into inside pressure sensitive area 13, and the pressure oscillation of such moment not will cause
The pressure of test is fluctuated, can play the role of compressive resistance interference, and the pressure of test is also more stable, meanwhile, this moment
The pulse of fluctuation, will not cause fatigue impact to presser sensor electric bridge 15, and presser sensor electric bridge 15 not will form fatigue
Load can guarantee the long-time stability of presser sensor electric bridge 15 and the service life of length, guarantee the stability of pressure test precision.
When marine diesel during operation, can also generate very big mechanical oscillation, the machine that this mechanical oscillation generate
Tool impact can pass to pressure sensor, also can form vibratory impulse to the electronic circuit inside pressure sensor core,
Some electronic circuits cause device to fall off, circuit malfunction, eventually lead to pressure because constantly being impacted by mechanical oscillation
Sensor detection accuracy reduces, and test error is big, and some pressure sensors directly fail, and cannot achieve detection；Various embodiments
In, pressure buffer ring 2 can be metal material, nonmetallic materials can also be used, such as nylon material, rubber material or POM material
Material, meanwhile, elastic cushion 16 can be equipped between compression ring 5 and cell pressure core 4, elastic cushion 16 is nylon material, can
To buffer mechanical oscillation impact, protection pressure sensor core is in a kind of Compliant pressure state, improves pressure sensing
The service life of device core.
Meanwhile the operating of marine diesel can generate very high temperature, cause the temperature of diesel-engine body very high, general meeting
Reach 80 DEG C -100 DEG C or so, but since pressure buffer ring is nonmetallic materials, such as nylon material, rubber material or POM material,
Heat-insulated effect can be played, being able to maintain cell pressure core is not in very high temperature, to guarantee cell pressure
Electronic circuit component on core not will receive thermal shock, and nonmetallic materials may be implemented pressure sensor and by high/low temperature rush
When hitting, stress can be discharged, guarantees measuring accuracy, the electronic circuit component and presser sensor electric bridge of sensor internal can be improved
Service life, can also improve sensor service life and improve detection accuracy, the temperature drift problems of sensor can also be reduced.
The pressure of pressure water conservancy diversion buffer area 11 and pressure buffer ring 2 that pressure tracting pressuring hole 8 is equipped with close to 2 side of pressure buffer ring
Being used cooperatively for power buffering release cavity 10, further reduced the manufacturing cost of pressure sensor, can be individually to the above reality
The pressure buffer ring 2 applied in example is processed, while directly being processed pressure of various shapes in the inner chamber body of lower case 1 and being led
Streambuf 11 can also reduce manufacturing cost, the pressure water conservancy diversion buffering that pressure tracting pressuring hole 8 is equipped with close to 2 side of pressure buffer ring
The pressure buffer of area 11 and pressure buffer ring 2 discharges the combination of cavity 10, solves in the long-time service of diesel engine pressure sensor
The technical problem that the service life of appearance is short, detection accuracy is poor.
The various forms for the pressure buffer ring 2 that above embodiments are enumerated, can complement one another application.
Only as described above, only specific embodiment of the utility model, when the utility model cannot be limited with this
The range of implementation, therefore the displacement of its equivalent assemblies, or according to equivalent changes and modifications made by the utility model patent protection scope,
It should still belong to the scope that the utility model claims book is covered.
Claims (10)
1. a kind of pressure sensor, is equipped with lower case and upper housing, the lower case lower end is equipped with pressure tracting pressuring hole, the lower casing
Cell pressure core is equipped with inside body upper end, cell pressure core bottom is equipped with pressure sensitive area, the feeling of stress
Area is answered to be connected with pressure tracting pressuring hole, cell pressure core upper end is equipped with compression ring, the compression ring jam sensor
Pressure core, the cell pressure core and pressure tracting pressuring hole and pressure sensitive area are to be tightly connected, it is characterized in that: described
Pressure buffer ring is equipped between pressure sensitive area and pressure tracting pressuring hole, the pressure buffer ring is equipped with pressure water conservancy diversion buffer damping
Hole, pressure buffer ring bottom are equipped with pressure and reflect buffering suface.
2. pressure sensor according to claim 1, it is characterised in that: the pressure buffer ring is with certain thickness
The pressure buffer ring of disc-shape, the disc-shape is equipped with pressure water conservancy diversion buffer damping hole, the pressure of the disc-shape
The plane of buffering ring is that pressure reflects buffering suface.
3. pressure sensor according to claim 1, it is characterised in that: the pressure buffer is equipped with support portion, described
It is connected on the inside of support portion and is equipped with pressure buffer release cavity, pressure buffer release cavity upper end is equipped with pressure refraction buffering
Face, the pressure refraction buffering suface are equipped with pressure water conservancy diversion buffer damping hole.
4. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure refraction buffering suface is plane
Or Surface of Sphere.
5. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure refraction buffering suface is by pressing
The support portion medial surface that power buffering ring is equipped with and pressure refraction buffering suface are continuously coupled, form the Surface of Sphere of complete integral shape,
The another side that the Surface of Sphere is located at pressure sensitive area side is also Surface of Sphere.
6. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure refraction buffering suface is equipped with
Pressure water conservancy diversion buffer damping hole be located at pressure tracting pressuring hole pressure refraction buffering suface on upright projection region outside, it is described
Pressure oil in pressure tracting pressuring hole enter pressure buffer release inside cavity strike pressure refraction buffering suface when, folding can be sprung back
It penetrates, then could be entered in pressure sensitive area by pressure water conservancy diversion buffer damping hole.
7. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure tracting pressuring hole is slow close to pressure
Ring side is rushed equipped with pressure water conservancy diversion buffer area, pressure water conservancy diversion buffer area discharges cavity with the pressure buffer on pressure buffer ring
The pressure buffer for forming greater room discharges cavity.
8. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure tracting pressuring hole is slow close to pressure
Rushing the pressure water conservancy diversion buffer area that ring side is equipped with is circular cone cavity geometry, described circular cone cavity great circle one end and pressure buffer ring
The pressure buffer release cavity being equipped with that is connected on the inside of support portion is connected, the female cone cavity inner surface of pressure water conservancy diversion buffer area
Inclined-plane is discharged for pressure water conservancy diversion, the pressure tracting pressuring hole is led close to the pressure for the circular cone cavity geometry that pressure buffer ring side is equipped with
The pressure buffer that the pressure buffer release cavity being equipped with that is connected on the inside of streambuf and support portion forms greater room discharges cavity.
9. pressure sensor according to claim 1 to 3, it is characterised in that: the pressure tracting pressuring hole is slow close to pressure
Rushing the pressure water conservancy diversion buffer area that ring side is equipped with is inner circle spherical cavity shape, the inner circle spherical cavity body great circle side and pressure buffer
The pressure buffer release cavity being equipped with that is connected on the inside of the support portion of ring is connected, in the female cone cavity of pressure water conservancy diversion buffer area
Surface is that pressure water conservancy diversion discharges inclined-plane, and pressure water conservancy diversion release inclined-plane is spherical shape, and the pressure tracting pressuring hole is close to pressure
Be connected the pressure buffer being equipped on the inside of the pressure water conservancy diversion buffer area for the inner circle spherical cavity shape that buffering ring side is equipped with and support portion
Release cavity forms continuous interior spheroid shape, the inner circle spherical cavity body that the pressure tracting pressuring hole is equipped with close to pressure buffer ring side
The pressure buffer release cavity being equipped with that is connected on the inside of the pressure water conservancy diversion buffer area of shape and support portion forms the pressure of greater room
Buffering release cavity.
10. pressure sensor according to claim 1, it is characterised in that: the pressure buffer ring outer circle side is equipped with close
Seal supports cancave cambered surface, and the sealing ring support cancave cambered surface, which is connected, is equipped with sealing ring, the inner periphery and sealing ring of the sealing ring
Support cancave cambered surface links together.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820826849.8U CN208206380U (en) | 2018-05-30 | 2018-05-30 | A kind of pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820826849.8U CN208206380U (en) | 2018-05-30 | 2018-05-30 | A kind of pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918022A (en) * | 2018-05-30 | 2018-11-30 | 威海泰航信息科技有限公司 | pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918022A (en) * | 2018-05-30 | 2018-11-30 | 威海泰航信息科技有限公司 | pressure sensor |
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Effective date of registration: 20230802 Address after: No. 18, Beihai Road, Chucun Town, Gaoqu District, Weihai City, Shandong Province 264210 Patentee after: Weihai Qingwei Building Materials Co.,Ltd. Address before: No. 305-1, Huoju Road, gaoqu District, Weihai City, Shandong Province 264200 Patentee before: WEIHAI THAI HANG INFORMATION TECHNOLOGY Co.,Ltd. |