CN109060236A - A kind of crankcase pressure sensor of simple adjustable alarming value - Google Patents
A kind of crankcase pressure sensor of simple adjustable alarming value Download PDFInfo
- Publication number
- CN109060236A CN109060236A CN201810987579.3A CN201810987579A CN109060236A CN 109060236 A CN109060236 A CN 109060236A CN 201810987579 A CN201810987579 A CN 201810987579A CN 109060236 A CN109060236 A CN 109060236A
- Authority
- CN
- China
- Prior art keywords
- lower case
- sheet metal
- film
- crankcase
- crankcase pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 238000005452 bending Methods 0.000 claims abstract description 7
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/142—Multiple part housings
- G01L19/143—Two part housings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0046—Fluidic connecting means using isolation membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to field of mechanical technique, disclose a kind of crankcase pressure sensor of simple adjustable alarming value.A kind of crankcase pressure sensor of the simple adjustable alarming value proposed has upper housing and lower case；It is fastened between upper housing, lower case and is formed as one the chamber that upper end is connected with crankcase connection, lower end with atmosphere；Film is provided in chamber；The middle part of film is disc-shaped, and the excircle of disc-shaped has symmetric bending section；Corresponding film is provided with T-type push rod；The upper end of T-type push rod is supported on the lower part of film plate part, and lower end is supported on sheet metal；One end of sheet metal is fixing end；The other end of sheet metal is cantilever end, is provided with binding post below cantilever end, lower end and the lower case of binding post connect firmly；The upper end of guide rod passes through sheet metal and T-type push rod is interference fitted, and lower end is located in the central through hole for adjusting screw.The present invention preferably reduces to equipment damage and corrosion, increases equipment life.
Description
Technical field
The invention belongs to field of mechanical technique, and in particular to a kind of crankcase pressure sensing of simple adjustable alarming value
Device.
Background technique
In engine work, a small amount of high temperature, high pressure gas can be by between piston and cylinder sleeves in combustion chamber
Gap enters crankcase.Since the gas for entering crankcase is less when engine work, engine will not be generated substantially
It influences.When piston ring and cylinder sleeve heel and toe wear or generation scuffing of cylinder bore, the gas of the burning of combustion chamber high temperature high pressure enters song
Axle box, and lubricating oil and oil gas are filled in crankcase, the gas of high temperature and pressure easily ignite oil gas, because crankcase is one relatively close
The space closed, will lead in crankcase and explodes.Therefore it when high temperature, high-pressure combustion gas enter crankcase, needs in time
The variation of crankcase pressure is detected, and this signal is passed to alarm system and triggers diesel engine stop, avoids that diesel engine is caused to be sent out
Raw more serious failure.Therefore crankcase pressure sensor detection engine behavior is critically important, this pressure sensor is set
Meter must simple, reasonable and high reliablity.
At present from published data, such as Authorization Notice No.: a kind of 206399581 U of CN " crankcase pressure sensing
Device ", this patent is using pressure chip measurement crankcase pressure and uses the pressure data of the contact pin of PCB output measurement, pressure
Chip and crankcase are connected directly, crankcase bad environments, unfavorable to protect pressure chip, and pressure chip price is more expensive.CN
202611801 U " sensor of collection engine oil level and one bulk measurement of crankcase pressure " and a kind of CN 101144406 A " crankshaft
Case control pressurer system " only mention using pressure sensor, it is not described the specific structure of pressure sensor.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of reliable operation, is quick on the draw, the simply adjustable alarm of structure
The crankcase pressure sensor of value.
The present invention, which adopts the following technical scheme that, completes its invention task:
A kind of crankcase pressure sensor of simple adjustable alarming value, the crankcase pressure sensor have upper housing,
The upper housing is the frame structure of lower end surface opening, and the upper surface of the upper housing has the air inlet being connected to crankcase
Hole；The lower case is the frame structure of upper surface opening；The lower end of the lower case is connected with atmosphere；Described is upper
It is fastened between shell, lower case and is formed as one the chamber that upper end is connected with crankcase connection, lower end with atmosphere；The chamber
Interior is provided with the film chamber to be divided into upper chamber and lower chambers；Upper housing and lower casing are stretched out in the both ends of the film
It body and is connected as one with upper housing, lower case；The inside at lower case lower end surface center has upward convex
Platform, and the center of the boss has to place the through-hole for adjusting screw；The adjusting screw is mounted on boss described
Through hole whorl in；The center for adjusting screw has the through-hole being connected with atmosphere；The middle part of the film is disc-shaped,
The excircle of disc-shaped has symmetric bending section；The corresponding film is provided with to be pushed away to the T-type of support film plate part
Bar；The upper end of the T-type push rod is supported on the lower part of film plate part, and the lower end of the T-type push rod is supported on sheet metal；
The sheet metal is located at the bottom chamber；One end of the sheet metal is fixing end, and through they sup-port under
On shell；The upper end of the support rod is connected firmly with the sheet metal, and the lower case lower end surface is stretched out in lower end, and with it is described
Lower case connect firmly；The other end of the sheet metal is cantilever end, is provided with binding post below cantilever end, the binding post
The lower case lower end surface is stretched out in lower end, and connects firmly with the lower case；The center of the sheet metal has to guide rod
The through-hole passed through；The upper end of the guide rod passes through sheet metal and the T-type push rod is interference fitted, and the lower end of guide rod, which is located at, adjusts spiral shell
In the central through hole of nail, and it can be moved up and down in the through-hole for adjusting screw；It is equipped on the guide rod and is compressed in gold
Belong to piece and adjusts the spring between screw；The cantilever end of the sheet metal in crankcase pressure increase to keep epicoele chamber pressure big
When cavity of resorption chamber pressure, the film compression is moved downward, and is driven the T-type push rod, sheet metal to move downward, is made sheet metal
Cantilever end contacted with binding post, formed switching signal be passed to warning device；The warning device is located at the outside of lower case；
Multiple limited posts moved up to limit film are provided on the inside of the upper housing upper surface.
The film is engineering plastics.
The guide rod is metallic rod, and surface is smooth, can reduce the friction with the lower case.
The lower end of the adjusting screw has a word groove, rotates the adjusting screw by straight screwdriver, in turn
The precompression for changing spring, to adjust crankcase pressure alarming value.
The sheet metal, binding post, support rod are copper product, to guarantee preferable electric conductivity.
The bending section is U-shaped structure on film.
The T-type push rod is plastic push-rod.
A kind of crankcase pressure sensor of simple adjustable alarming value proposed by the present invention, by adopting the above technical scheme,
It has the following beneficial effects:
The sealed chamber formed between upper housing and lower case is divided into upper chamber and lower chambers by set film, on
Chamber is connected with the crankcase of bad environments, and lower chambers are connected with atmosphere；Cavity of resorption room environmental is atmospheric air, relative to song
The environment of axle box preferably reduces to equipment damage and corrosion, increases equipment life；Since atmospheric pressure is more stable,
After crankcase pressure changes, film is pressurized and deforms rapidly, and crankcase pressure is converted to displacement.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is present invention triggering alert operation schematic diagram；
Fig. 3 is the structural schematic diagram of upper housing in the present invention；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the structural schematic diagram of lower case in the present invention；
Fig. 6 is the top view of Fig. 5；
The structural schematic diagram of plastic push-rod in Fig. 7 present invention；
The structural schematic diagram of sheet metal in Fig. 8 present invention；
The structural schematic diagram of Fig. 9 present invention adjusting screw；
Figure 10 is the top view of Fig. 9.
Figure 11 is usage state diagram of the invention.
In figure: 1, upper housing；2, lower case；3, film；4, T-type push rod；5, sheet metal；6, binding post；7, spring；8, it leads
Bar；9, screw is adjusted；10, nut；11, bolt；12, support rod；13, crankcase pressure sensor；14, warning device, 15, company
Take over road, 16, crankcase.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing:
As shown in Figure 1, a kind of crankcase pressure sensor of simple adjustable alarming value, the crankcase pressure sense utensil
There is upper housing 1, in conjunction with Fig. 3, Fig. 4, the upper housing 1 is the frame structure of lower end surface opening, the upper surface of the upper housing 1
With the air inlet being connected to crankcase 12；Pressure in crankcase is introduced in the shell by connecting line；In conjunction with Fig. 5,
Fig. 6, the lower case 2 are the frame structure of upper surface opening；The lower end of the lower case 2 is connected with atmosphere；It is described
Upper housing 1, the chamber for being formed as one that upper end is connected to crankcase, lower end is connected with atmosphere is fastened between lower case 2；Institute
The film 3 chamber to be divided into upper chamber and lower chambers is provided in the chamber stated；Upper casing is stretched out at the both ends of the film 3
Body 1 and lower case 2 and with upper housing 1, lower case 2 by bolt 11, nut 10 sealed connection be integrated；The lower case 2
The inside at lower end surface center has upward boss, and the center of the boss has to place the logical of adjusting screw 9
Hole；In conjunction with Fig. 9, Figure 10, the adjusting screw 9 is connect with through hole whorl described on boss；The center for adjusting screw 9
With the through-hole being connected with atmosphere；The middle part of the film 3 is disc-shaped, and excircle has symmetric bending section；In conjunction with Fig. 7,
The corresponding film 3 is provided with the T-type push rod 4 to support film plate part；The upper end of the T-type push rod 4 is supported on
The lower end of the lower part of film plate part, the T-type push rod 4 is supported on sheet metal 5；The sheet metal 5 is located at described
Bottom chamber；The pressure of lower chambers is identical as outside atmosphere, and in conjunction with Fig. 8, one end of the sheet metal 5 is fixing end, and is passed through
Support rod 12 is supported in lower case；The support rod 121Upper end connected firmly with the sheet metal 5, lower end is stretched out described
Lower case lower end surface, and connected firmly with the lower case；The other end of the sheet metal 5 is cantilever end, is set below cantilever end
It is equipped with binding post 6, the lower case lower end surface is stretched out in the lower end of the binding post 6, and connects firmly with the lower case；It is described
The center of sheet metal 5 has the through-hole passed through to guide rod 8；The upper end of the guide rod 8 passes through sheet metal 5 and the T-type push rod 4
The lower end of interference fit, guide rod 8 is located in the central through hole for adjusting screw 9, and can be in the through-hole for adjusting screw 9 up and down
It is mobile；The spring 7 being compressed between sheet metal and adjusting screw is equipped on the guide rod 8；The spring-compressed of the spring 7
Plastic push-rod 4 is pressed on the film 2 by power by the sheet metal 5.The cantilever end of the sheet metal 5 is in crankcase
When pressure increase makes epicoele chamber pressure be greater than cavity of resorption chamber pressure, film compression is moved downward, drive the T-type push rod,
Sheet metal moves downward, and contacts the cantilever end of sheet metal with binding post, forms switching signal and is passed to warning device；The report
Alarm device is located at the outside of lower case；Multiple limits moved up to limit film are provided on the inside of the upper housing upper surface
Column.
The film 3 is engineering plastics.
The guide rod 8 is metallic rod, and surface is smooth, can reduce the friction with the lower case.
The lower end of the adjusting screw 9 has a word groove, rotates the adjusting screw by straight screwdriver, in turn
The precompression for changing spring, to adjust crankcase pressure alarming value.
The sheet metal 5, binding post 6, support rod 12 are copper product, to guarantee preferable electric conductivity.
The bending section is U-shaped structure on film.
The T-type push rod 4 is plastic push-rod.
In conjunction with Fig. 1, Fig. 2 and Figure 11, working principle: when engine work, the crankcase of 1 upper chamber of upper housing
Pressure is equal to 2 lower chambers atmospheric pressure of lower case and adds spring force；When engine piston ring and cylinder sleeve heel and toe wear or generation
The combustion gas of scuffing of cylinder bore, combustion chamber high temperature high pressure enters crankcase, crankcase pressure can be caused to increase, when crankcase pressure becomes larger
When, the pressure in the upper housing 1 is greater than 2 lower chambers atmospheric pressure of lower case and adds spring force, therefore film 2 moves downward,
T-type push rod 4, metal gasket 5 is driven to run down simultaneously.Metal gasket 5 is contacted with binding post 6, forms the incoming report of switching signal
Alarm device.
A kind of adjusting alarming value working principle: the adjusting screw 9 and lower case 2 design screw thread, and the tune
It saves 9 lower end of screw and mounting hole is set, the adjusting screw 9 is rotated by straight screwdriver.If the adjusting screw 9 is to moving up
Dynamic, then the deformation increase of spring 8, spring force increase, and the crankshaft pressure value for reaching alarm also increases with it.
If the adjusting screw 8 moves down, generation and above content adverse consequences, then crankcase pressure alarming value drops
It is low.
In this document, warning device is not our main point, and can be designed using existing structure in the prior art,
Don't explain too much here.
Claims (7)
1. a kind of crankcase pressure sensor of simple adjustable alarming value, it is characterised in that: the crankcase pressure sensing
Device has upper housing and lower case；The upper housing is the frame structure of lower end surface opening, the upper end mask of the upper housing
There is the air inlet being connected to crankcase；The lower case is the frame structure of upper surface opening；The lower end of the lower case
It is connected with atmosphere；Fastened between the upper housing, lower case be formed as one upper end be connected to crankcase, lower end and atmosphere
The chamber being connected；The film chamber to be divided into upper chamber and lower chambers is provided in the chamber；The film
Both ends stretch out upper housing and lower case and be connected as one with upper housing, lower case；Lower case lower end surface center
Inside has upward boss, and the center of the boss has to place the through-hole for adjusting screw；The adjusting
Screw is connect with through hole whorl described on boss；The center for adjusting screw has the through-hole being connected with atmosphere；It is described
The middle part of film is disc-shaped, and the excircle of disc-shaped has symmetric bending section；The corresponding film is provided with to prop up
Support the T-type push rod of film plate part；The upper end of the T-type push rod is supported on the lower part of film plate part, the T-type push rod
Lower end be supported on sheet metal；The sheet metal is located at the bottom chamber；One end of the sheet metal is fixing end,
And through they sup-port in lower case；The upper end of the support rod is connected firmly with the sheet metal, and lower end is stretched out described
Lower case lower end surface, and connected firmly with the lower case；The other end of the sheet metal is cantilever end, and the lower section of cantilever end is arranged
There is binding post, the lower case lower end surface is stretched out in the lower end of the binding post, and connects firmly with the lower case；The metal
The center of piece has the through-hole passed through to guide rod；The upper end of the guide rod passes through sheet metal and the T-type push rod is interference fitted,
The lower end of guide rod is located in the central through hole for adjusting screw, and can move up and down in the through-hole for adjusting screw；Described
The spring being compressed between sheet metal and adjusting screw is equipped on guide rod；The cantilever end of the sheet metal is in crankcase pressure
When power increase makes epicoele chamber pressure be greater than cavity of resorption chamber pressure, the film compression is moved downward, and drives the T-type push rod, gold
Belong to piece to move downward, contact the cantilever end of sheet metal with binding post, forms switching signal and be passed to warning device；The alarm
Device is located at the outside of lower case；Multiple limits moved up to limit film are provided on the inside of the upper housing upper surface
Column.
2. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: described
Film is engineering plastics.
3. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: described
Guide rod is metallic rod, and surface is smooth, can reduce the friction with the lower case.
4. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: described
The lower end of adjusting screw there is a word groove, the adjusting screw is rotated by straight screwdriver, and then change the pre- of spring
Pressure, to adjust crankcase pressure alarming value.
5. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: described
Sheet metal, binding post, support rod are copper product, to guarantee preferable electric conductivity.
6. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: film
The upper bending section is U-shaped structure.
7. a kind of crankcase pressure sensor of simple adjustable alarming value as described in claim 1, it is characterised in that: described
T-type push rod be plastic push-rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987579.3A CN109060236B (en) | 2018-08-28 | 2018-08-28 | Crankcase pressure sensor of simple adjustable alarm value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987579.3A CN109060236B (en) | 2018-08-28 | 2018-08-28 | Crankcase pressure sensor of simple adjustable alarm value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109060236A true CN109060236A (en) | 2018-12-21 |
| CN109060236B CN109060236B (en) | 2023-12-01 |
Family
ID=64757364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810987579.3A Active CN109060236B (en) | 2018-08-28 | 2018-08-28 | Crankcase pressure sensor of simple adjustable alarm value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109060236B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2359686Y (en) * | 1997-08-08 | 2000-01-19 | 李怀平 | Alarm sensor for tyre underpressure |
| CN105928654A (en) * | 2016-04-14 | 2016-09-07 | 江苏环力科技发展有限公司 | Pressure sensor for water pump pressure controller |
| CN208953196U (en) * | 2018-08-28 | 2019-06-07 | 河南柴油机重工有限责任公司 | A kind of crankcase pressure sensor of simple adjustable alarming value |
-
2018
- 2018-08-28 CN CN201810987579.3A patent/CN109060236B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2359686Y (en) * | 1997-08-08 | 2000-01-19 | 李怀平 | Alarm sensor for tyre underpressure |
| CN105928654A (en) * | 2016-04-14 | 2016-09-07 | 江苏环力科技发展有限公司 | Pressure sensor for water pump pressure controller |
| CN208953196U (en) * | 2018-08-28 | 2019-06-07 | 河南柴油机重工有限责任公司 | A kind of crankcase pressure sensor of simple adjustable alarming value |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109060236B (en) | 2023-12-01 |
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