CN109632313A - Engine valve movement rule measuring device and method for complicated mist environment - Google Patents
Engine valve movement rule measuring device and method for complicated mist environment Download PDFInfo
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- CN109632313A CN109632313A CN201811346405.5A CN201811346405A CN109632313A CN 109632313 A CN109632313 A CN 109632313A CN 201811346405 A CN201811346405 A CN 201811346405A CN 109632313 A CN109632313 A CN 109632313A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to Engine Block Test technical fields, and specifically disclose engine valve movement rule measuring device and method for complicated mist environment, it includes laser displacement sensor, fixing seat, laser optical path oil removal cover, valve fixture block and dynamic signal acquisition analysis system, laser displacement sensor is mounted in fixing seat, for emitting laser, laser is received after scattering in the measuring surface of valve fixture block by laser displacement sensor, and the laser signal after reception is converted into electric signal transmission into dynamic signal acquisition analysis system；Laser optical path oil removal cover covers on outside laser displacement sensor；Valve stem fixation hole is offered in the middle part of valve fixture block, one end is provided with measuring surface, is additionally provided with oil separating plate and oil unloading trough between valve stem fixation hole and measuring surface；Dynamic signal acquisition analysis system is connected with laser displacement sensor.The present invention is suitable for realizing the real―time precision measurment of valve motion rule under complicated mist environment, has many advantages, such as that structure is simple, measures accurate.
Description
Technical field
The invention belongs to Engine Block Test technical fields, more particularly, to the engine air for complicated mist environment
Door characteristics of motion measuring device and method.
Background technique
Valve actuating mechanism is one of big movement mechanism of engine two, it is regular according to the working cycles of engine, time opening
Or valve is closed, so that fresh air is entered cylinder, exhaust gas is discharged out of cylinder, forms the reasonable circulation of working medium.Starting simultaneously
Machine compression process and acting process guarantee the sealing of combustion chamber, form stronger acting ability.The quality of valve operating status is straight
The scavenging period for affecting engine is connect, and then affects the quality of engine combustion performance and emission level, within the engine
Play the role of vital.So carrying out the valve motion rule measurement under engine real machine operating status, optimization is started
Machine Design of Valve, assessment engine valve actuating mechanism operating status, the reliability service for guaranteeing engine etc. suffer from weight
The directive significance wanted.
The measurement of valve motion rule, main includes the measurement of valve stroke.The measurement of valve stroke substantially divides and has at present
Four classes: after one is primarily used for engine assembly, carry out valve assembly whether satisfactory static measurement.This kind of measurement is current
It is widely used in the assembly monitoring of each motor corporation or Engine Company, corresponding patent is also most, such as
CN201020700356.3, CN201110424884.X, CN201210060271.7, CN201520101336.7,
CN201611100436.3 etc..This kind of to measure the rotation that engine is realized often through the form of jiggering, rotation speed is very low,
Its valve motion rule is entirely different with the kinematics and dynamic law of the valve motion under engine real machine operating status, no
Accelerate there are the valve under engine real machine operating status and retarded motion, flies off and bounce etc. not just so valve can not be obtained
Normal motion feature.Therefore, whether valve stroke meets design conditions after such measurement method can only be used to monitoring engine assembly.
Second is that the valve stroke for flow bench measures, this kind of valve stroke measurement method is relatively simpler, is only used for measurement not
With the valve lift amount under valve lift state, the measurement of valve motion rule it is not related to.It is such since method is relatively easy
Research and patent are all relatively fewer.Third is that the valve motion rule on valve motion simulated experiment platform and simulated experiment platform measures.
This kind of measurement can preferably measure the rule of the valve motion on simulated experiment platform, but due in valve motion simulated experiment platform,
The situation of expanding with heat and contract with cold of valve actuating push rod etc. can not be simulated, and also the vibration of engine does not influence, therefore, the valve of measurement is transported
Dynamic rule is relatively more satisfactory, also different with the valve motion rule under engine real machine operating status.Such measurement it is special
Benefit also has very much, such as CN201220152112.5, CN201310188820.3, CN201610724010.9 etc..Fourth is that engine
The on-line measurement of valve motion rule under real-time running state.This kind of measurement is measured under engine actual operating mode,
The influence of influence and engine luggine that valve and push rod under working conditions of different engines expand with heat and contract with cold is contained, is measured
It is just truer to obtain valve motion rule and dynamic law, is flown off according to the valve of these law-analysings, valve knock-on, gas
Door abrasion, valve is hit and stress condition is just truer, can more instruct the design of engine valve actuating mechanism.More due to such measurement
Become engine reality, and corresponding measurement method starts slowly to popularize, and corresponding patent has CN201110418961.0,
CN201320042644.8, CN201320045694.1 etc..
Above-mentioned four classes measurement method, respectively there is advantage and disadvantage, is suitble to different purposes.In engine assembly detection, simple thousand
Divide the modes such as table to measure the valve stroke under each corner, obtains the valve lift curve of engine, this method is simple and efficient, energy
Accelerate engine assembly speed, suitable for the batch detection on assembly line.But this method cannot achieve engine real machine operation shape
The measurement of valve motion rule under state, having little significance for detection and monitoring to engine real machine operating status, can not also refer to
Lead the design and optimization of engine valve actuating mechanism.Valve motion simulated experiment platform often uses motor to drive valve actuating mechanism movement,
To simulate the characteristics of motion of valve.Valve motion simulated experiment platform is a kind of engine valve actuating mechanism of simplified version, simulation test
It is bigger that space is measured in platform, while can remove some complex environments, so measurement difficulty is relatively small.Such measurement is to valve
Design there is directive significance, anti-air-stop gate can be instructed to fly off the Design of Valve with valve knock-on, but due to nothing
Method accurate simulation valve actuating mechanism expanded by heating situation and engine vibration are to the stressing influence of valve actuating mechanism, therefore there is also certain
Deficiency, the directive significance of stress and abrasion analysis to valve actuating mechanism is relatively inadequate.
In real machine measurement, specific measurement method also there are many, as used differential transformation type displacement sensor etc
Rod-type displacement sensor valve stroke；Valve stroke is measured using electronic gauge；Valve is recorded using high-speed camera
Motion process obtains valve motion rule using the method for image procossing；Use the methods of laser displacement sensor.Wherein,
The movement speed that rod-type displacement sensor bar allows is limited, cannot survey the valve stroke under high revolving speed, and these are sensed
Device needs to be fixed together with valve, this just significantly increases the quality of valve motion part, changes the inertia rule of valve motion
Rule, to change original kinetic characteristic of valve.Laser displacement measurement and high-speed camera measurement are then untouchable measurement, no
The primary characteristic that valve motion can be changed more has benifit to research valve motion rule, and High frequency photographing measurement need to be to acquisition
Picture, which carries out data processing, can just obtain valve motion rule, and process is relatively complicated, simple not as good as laser displacement sensor measurement
It is convenient.In engine real machine operational process, in engine air cylinder cap, especially valve nearby there are a large amount of lubricating oil, with
The lubrication of valve actuating mechanism kinematic pair is carried out, these lubricating oil are often present near valve in the form of oil droplet or mist of oil.It adopts
It is measured with laser displacement sensor, is to measure displacement by the propagation of laser, and a large amount of oil droplet and mist of oil can be such that light beam produces
Raw refraction and scattering, to affect measurement accuracy.
To sum up, environment is measured for complicated mist of oil, current valve motion rule measuring device is difficult to be applicable in, and this field is urgently
Researching and designing need to be carried out to obtain the valve motion rule measuring device for meeting complicated mist of oil measurement environment.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of suitable for complicated mist environment
Engine valve movement rule measuring device and method, it is therefore intended that solve existing measuring device and be not suitable in complicated mist of oil ring
The problem of precise measurement is realized under border, the present invention is by setting oil removal structure, so that measuring device is suitable in complicated mist of oil ring
The real―time precision measurment of valve stroke rule or the characteristics of motion under border when realization engine real machine operating status, has structure letter
It is single, measure the advantages that accurate.
To achieve the above object, according to one aspect of the present invention, a kind of hair suitable for complicated mist environment is proposed
Motivation valve motion rule measuring device comprising laser displacement sensor, fixing seat, laser optical path oil removal cover, valve fixture block
And dynamic signal acquisition analysis system, wherein the laser displacement sensor is mounted in fixing seat, for emitting laser to hang down
In the measuring surface of valve fixture block, laser is sensed by laser displacement again after scattering in the measuring surface of valve fixture block for direct projection
Device receives, and the laser signal after reception is converted into electric signal transmission into dynamic signal acquisition analysis system；The laser optical path
Oil removal cover covers on outside laser displacement sensor, prevents on lubricating oil splash to laser optical path, and will be splashed on oil removal cover
Lubricating oil drains into specified region；The valve fixture block is set to the lower section of laser displacement sensor laser beam emitting head, and middle part is opened
Equipped with valve stem fixation hole, for valve fixture block to be mounted on valve stem, one end is provided with positioned at laser displacement sensor
The measuring surface of underface is additionally provided with oil separating plate and oil unloading trough between the valve stem fixation hole and measuring surface；The dynamic letter
Number acquisition analysis system is connected with laser displacement sensor, for receiving the electric signal of laser displacement sensor transmission.
As it is further preferred that being offered on the laser optical path oil removal cover for laser optical path oil removal cover to be mounted on
Mounting hole outside laser displacement sensor, top surface offer the U for avoiding laser displacement sensor DOL Data Output Line cable
Type hole, positive lower end setting is gradient, flows away downwards so as to be splashed to the positive lubricating oil of oil removal cover, and bottom is provided with band tiltedly
The oil guide groove of degree flows to setting regions so as to walk from the lubricating oil that oil removal cover flows in oil guide groove to lower effluent.
As it is further preferred that offer the gap being connected to valve stem fixation hole on the valve fixture block, also open up
The bolt fixing hole for having axis vertical with the fixed axially bored line of valve stem, is passed through after valve fixture block is mounted on valve stem with this and is twisted
The tight bolt across bolt fixing hole is closed gap, so that valve fixture block deforms, and then valve fixture block is reliable and stable
Be fixed on valve stem.
As it is further preferred that the width in the gap is 3-6mm.
As it is further preferred that the measuring surface is surrounded by emptying chamfering, it is splashed in measuring surface for making
Lubricating oil quickly flows away.
As it is further preferred that offering oil separating plate between the measuring surface and valve stem fixation hole, which hinders
The lubricating oil to optical path and measuring surface is splashed due to hitting valve because of valve rocker (or valve bridge).
As it is further preferred that the oil unloading trough is provided between measuring surface and oil separating plate, the oil unloading trough and oil separating plate,
Emptying chamfering reduces the accumulation of the oil film in measuring surface jointly.
As it is further preferred that the surrounding of the fixing seat is offered for fixing seat to be fixed on engine cylinder cap
On fixing seat mounting hole, side offers the sensor mounting hole for installing laser displacement sensor.
Other side according to the invention proposes a kind of engine valve movement rule suitable for complicated mist environment
Restrain measurement method comprising following steps:
1) bolt and nut is loaded onto after valve fixture block being mounted on valve stem, tightening bolt is closed gap, by valve
Fixture block is fixed on valve stem；
2) on the engine by fixing seat installation, the laser optical path oil removal cover in laser displacement sensor outer cup, then
Laser displacement sensor is installed to fixing seat corresponding position, so that the laser of laser displacement sensor transmitting is vertically penetrated in valve
In the measuring surface of fixture block；
3) start engine, laser displacement sensor, dynamic signal acquisition analysis system and divide with dynamic signal acquisition
The connected computer of analysis system, starts the output signal for acquiring laser displacement sensor after engine operating condition is stablized, and acquisition is pre-
If stopping acquiring and saving data after the time, computer obtains the measurement of engine valve movement rule according to the collected data.
As it is further preferred that further including following steps: 4) changing engine operating condition, acquire corresponding under different operating conditions
The output signal of laser displacement sensor realizes the measurement of engine valve movement rule under different operating conditions.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, mainly have below
Technological merit:
1. measuring device of the invention is provided with oil removal structure, in measurement process, swashing outside laser displacement sensor
Light optical path oil removal cover can prevent on lubricating oil splash to laser optical path, avoid larger-diameter lubricating oil drop to optical path
Refraction action improves the precision of laser measurement；Meanwhile gradient and oil guide groove is set on laser optical path oil removal cover, it can make to fly
The lubricating oil splashed on oil removal cover quickly flows away, to reduce the lubricant mist in measured zone, improves laser measurement
Sensitivity；These measures improve laser displacement sensor and measure valve stroke rule or valve under engine real machine operating status
The measurement accuracy of the characteristics of motion, the high precision online measuring for the engine valve movement rule under complicated mist environment provide
Basis.
2. the present invention, which is used as design in the valve fixture block in laser displacement measurement face, oil separating plate, oil unloading trough, these oil removals are unloaded
The quality of lubrication oil for flowing to measuring surface can be greatly decreased in oily structure, meanwhile, the survey of laser displacement measurement is used as on valve fixture block
On amount face design have emptying chamfering, the structure can quick emptying, to reduce the heap of lubricating oil in measuring surface, it is therefore prevented that because profit
Lubricating oil heaps the measurement numerical value of valve stroke rule caused by thickness.
3. the present invention can be mounted on valve fixture block is reliable and stable on valve stem by setting gap structure, guarantee to survey
Stability, reliability and the measurement accuracy of amount.
Detailed description of the invention
Fig. 1 is the engine valve movement rule measuring device provided in an embodiment of the present invention for being suitable for complicated mist environment
Main sectional view；
Fig. 2 is the engine valve movement rule measuring device provided in an embodiment of the present invention for being suitable for complicated mist environment
Sectional view；
Fig. 3 is the top view of fixing seat of the invention；
Fig. 4 is the main view of fixing seat of the invention；
Fig. 5 is the working principle diagram of laser displacement sensor；
Fig. 6 is the structure chart of laser optical path oil removal cover of the invention
Fig. 7 is the top view of valve fixture block of the invention；
Fig. 8 is the main view of valve fixture block of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figs. 1-2, a kind of engine valve movement suitable for complicated mist environment provided in an embodiment of the present invention
Regular measuring device comprising laser displacement sensor 2, fixing seat 1, laser optical path oil removal cover 3, valve fixture block 4 and dynamic are believed
Number acquisition analysis system 6, wherein laser displacement sensor 2 is mounted in fixing seat 1, and the laser displacement sensor 2 is for emitting
Laser vertically to penetrate in the measuring surface of valve fixture block 4, laser scattered in the measuring surface of valve fixture block after again by swashing
Optical displacement sensor 2 receives, and the laser signal after reception is converted into electric signal transmission into dynamic signal acquisition analysis system 6；
Laser optical path oil removal cover 3 covers on outside laser displacement sensor 2, prevents on lubricating oil splash to laser optical path；Valve fixture block 4 is pacified
On valve stem 5, and it is set to the lower section of laser displacement sensor 2, dynamic signal acquisition analysis system 6 and laser displacement sense
Device 2 is connected, for receiving the electric signal of laser displacement sensor transmission.
As shown in Figure 3-4,1 bottom surrounding of fixing seat is offered for fixing seat stabilization to be clamped securely to engine air
Fixing seat mounting hole 1-1 on cylinder cap, the side of sensor mounting hole are offered thereon as mounting plane for by laser position
Displacement sensor 2 stablizes the sensor mounting hole 1-2 being firmly fixed in fixing seat, utilizes mounting plane and sensor mounting hole
Laser displacement sensor 2 is installed, the measurement that the laser that guarantee laser displacement sensor issues can be vertically projected to valve fixture block is flat
On face.Specifically, fixing seat is engine air cylinder cap or engine air cylinder cap alternative structure, fixing seat is mounted on hair
Above motivation cylinder head.
Fig. 5 is the working principle diagram of laser displacement sensor, which uses routine in the prior art
Laser displacement sensor occurs in the measuring surface of valve fixture block the basic principle is that laser is issued by laser diode
Scattering, the laser after scattering are received by laser displacement sensor again, are then converted to electric signal.
As shown in fig. 6, laser optical path oil removal cover 3 is mounted on laser displacement sensor, prevent lubricating oil splash to laser
In optical path, to influence measurement accuracy, laser optical path oil removal cover should not interfere with laser optical path, dry not generating to other equipment
It is as much as possible in the case where relating to protect optical path, in order to flow the lubricating oil being splashed on laser optical path oil removal cover as early as possible
Out, it prevents lubricant mist, is machined with oil guide structure on oil removal cover, lubricating oil guidance is flowed to the position for not influencing laser measurement
It sets.Specifically, the side of laser optical path oil removal cover 3 is offered for laser optical path oil removal cover 3 to be mounted on laser displacement sensing
Mounting hole 3-1 on device, top surface offer the U-shaped hole 3-2 for avoiding laser displacement sensor DOL Data Output Line cable, installation
Hole 3-1 and U-shaped hole 3-2 uses Design of Compatibility, meets the installation requirements of laser displacement sensor, guarantees laser displacement sensor
Inlet and exhaust valve lift can be measured with suitable mounting means, the lower end of laser optical path oil removal cover be obliquely installed so that be splashed to every
Lubricating oil on oil cover quickly flows away downwards, and bottom is provided with a circle oil guide groove 3-3, and the both ends of oil guide groove 3-3 are obliquely installed, with
The lubricating oil flowed in oil guide groove from oil removal cover is set to flow away to two sides rapidly.
Other than laser optical path oil removal cover, according to the actual configuration of engine, the biggish oil outlet of flow of lubrication is done
Oil removal and processing is dredged, avoids under high-speed working condition lubricating oil from spraying and collide the lubrication oil droplet to form splashing, shadow with other component
Ring the measurement of laser displacement sensor.
As Figure 7-8, the middle part of valve fixture block 4 offers valve stem fixation hole 4-1, for installing valve fixture block 4
On valve stem 5, one end (such as right end) of valve fixture block 4 is provided with the measuring surface immediately below laser displacement sensor 2
4-2 is provided with oil separating plate 4-3 for projecting laser measurement valve stroke between valve stem fixation hole 4-1 and measuring surface 4-2, every
Region between oiled-plate method 4-3 and measuring surface 4-2 is provided with oil unloading trough, and oil separating plate 4-3 is for being isolated because of valve rocker (or valve bridge)
It hits valve stem and splashes the lubricating oil to optical path and measurement plane.
It is separated, is prevented at the top of lubrication valve by an oil separating plate and oil unloading trough between measuring surface and valve stem fixation hole side
Lubricating oil is splashed in measuring surface by valve stem fixation hole side, wherein and measuring surface surrounding and oil unloading trough two sides are all machined with chamfering,
The lubricating oil for being splashed to measuring surface on a small quantity can be made quickly to flow out from oil unloading trough, reduce lubricating oil heap to the shadow of laser measurement
It rings, to improve measurement accuracy.In order to guarantee being reliably connected for valve fixture block 4 and valve stem 5, also opened up on valve fixture block 4
There are a gap 4-4 and gas bolt fixing hole 4-5 of a wide 3-6mm, the other end that gap 4-4 is located at valve fixture block 4 is (such as left
End), gap 4-4 is connected to valve stem fixation hole 4-1, and gap 4-4 opens up opening for direction and valve stem fixation hole 4-1
Set direction is identical, and the axis of bolt fixing hole 4-5 is vertical with the axis of valve stem fixation hole 4-1, bolt fixing hole 4-5 be
The one of gap two sides processing runs through the through-hole of pressure valve clamp block, which is mounted on gas for valve fixture block with this for installing bolt
Screw bolt and nut is loaded onto after in door rod, the bolt by being driven through bolt fixing hole 4-5 is closed gap 4-4, gap closure
It is deformed valve stem fixation hole 4-1, deformation force tightly sticks together valve stem fixation hole and valve stem, by pressure valve clamp
Block is fixedly secured on valve stem.
Specifically, dynamic signal acquisition analysis system 6 is used to receive the electric signal of laser displacement sensor transmission, institute is obtained
The data of need simultaneously carry out data processing, are not emphasis of the invention, using existing signal processing and analysis system, i.e., existing
Some signal processing and analysis systems are suitable for the present invention.For the acquisition requirement for meeting valve high-speed motion regular signals, dynamic
Signal processing and analysis system is at least able to satisfy the sample frequency of 20KHZ, to filter out the high-frequency vibration part for including in output signal,
Dynamic signal acquisition analysis system should be able to carry out low-pass filtering operation, to seek valve speed from valve stroke signal and valve adds
Speed signal, dynamic signal acquisition analysis system should be able to carry out derivation operation.In addition, dynamic signal acquisition analysis system should also have
There is signal to show, data save the functions such as output.
The specific measuring process of engine valve movement rule measuring device of the invention is as follows:
1) bolt and nut is loaded onto after valve fixture block 4 being mounted on valve stem 5, tightening bolt is closed gap, by valve
The stabilization of fixture block 4 is fixed firmly on valve stem 5；
2) fixing seat 1 is put on engine (such as single-cylinder four stroke diesel engine) corresponding position, passes through fixation with bolt
Seat mounting hole by fixing seat 1 stabilization is fixed firmly on engine, in 2 outer cup of laser displacement sensor laser optical path every
Laser displacement sensor 2, is then installed in fixing seat 1, laser displacement sensor 2 is connected to Dynamic Signal and is adopted by oil cover 3
It in set analysis system and is powered, adjusts 2 position of laser displacement sensor, be mapped to laser vertically in the measuring surface of valve fixture block 4,
And fixed laser displacement sensor；
3) computer for starting dynamic signal acquisition analysis system and being connected with dynamic signal acquisition analysis system, setting are every
Parameter, such as the transformational relation of laser displacement sensor output voltage signal and displacement are added low-pass filtering module and remove signal
High-frequency vibration, First-order Integral module is added and seeks valve speed signal, Second Order Integral module is added and seeks valve acceleration letter
Number；
4) check engine test rack, guarantee each section installation it is firm, working properly, without physical interference, it is real to do booting
Preparation before testing；
5) engine operating condition is set, engine is started, starts to acquire laser displacement sensor after engine operating condition is stablized
Output signal stops acquiring and saves data after acquiring a period of time according to demand, and the moment pays attention to measuring in data acquisition
Data, because stopping experiment at once, find reason, and be resolved if there is unusual data are generated.
6) change experiment condition according to demand, obtain the valve stroke signal under different operating conditions, hair is closed after experiment
Motivation checks tooling and sensor states and is safeguarded.
In short, under engine real machine operating status valve motion rule measurement, have to the design of valve actuating mechanism important
Guiding value.But under engine real machine operating status, a large amount of lubricating oil oil droplet and mist of oil are contained in valve mechanism cover, these oil
Drop and mist of oil to using optical means carry out valve stroke rule or valve motion rule on-line measurement measurement accuracy have compared with
It is big to influence.Measuring device of the invention is that laser measurement optical path is equipped with oil removal and Unloading Device, in measurement process, laser optical path
Oil removal cover can prevent on lubricating oil splash to laser optical path, there is tiltedly design in the valve fixture block as laser displacement measurement face
Slot, the structure can quick draining, to prevent oil accumulation in measuring surface, these oil removal oil drainage structures can greatly improve laser position
Displacement sensor measures the measurement accuracy of valve stroke rule or valve motion rule, for the engine valve under complicated mist environment
The high precision online measuring of the characteristics of motion provides the foundation, it can be achieved that engine air valve lift is regular under complicated mist environment or transports
Move the real machine measurement of rule.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of engine valve movement rule measuring device suitable for complicated mist environment, which is characterized in that including laser
Displacement sensor (2), fixing seat (1), laser optical path oil removal cover (3), valve fixture block (4) and dynamic signal acquisition analysis system
(6), wherein the laser displacement sensor (2) is mounted on fixing seat (1), for emitting laser vertically to penetrate in pressure valve clamp
In the measuring surface of block (4), laser is connect by laser displacement sensor (2) again after scattering in the measuring surface of valve fixture block
It receives, the laser signal after reception is converted into electric signal transmission into dynamic signal acquisition analysis system (6)；The laser optical path every
Oil cover (3) covers on laser displacement sensor (2) outside, prevents on lubricating oil splash to laser optical path, and will be splashed to oil removal cover
On lubricating oil drainage, avoid generating lubrication oil droplet and lubricant mist in laser optical path；The valve fixture block (4) is set to laser
The lower section of displacement sensor (2), middle part offer valve stem fixation hole (4-1), for valve fixture block (4) to be mounted on valve
On bar (5), one end is provided with the measuring surface (4-2) immediately below laser displacement sensor (2) laser beam emitting head, the gas
Oil separating plate (4-3) and oil unloading trough (4-6) are provided between door rod fixation hole (4-1) and measuring surface (4-2)；The Dynamic Signal is adopted
Set analysis system (6) is connected with laser displacement sensor (2), for receiving the electric signal of laser displacement sensor transmission.
2. the engine valve movement rule measuring device as described in claim 1 for being suitable for complicated mist environment, feature
It is, is offered on the laser optical path oil removal cover (3) for laser optical path oil removal cover (3) to be mounted on laser displacement sensor
External mounting hole (3-1), top surface offer the U-shaped hole (3-2) for avoiding laser displacement sensor DOL Data Output Line cable,
Its positive lower end setting is gradient, so that the lubricating oil being splashed on oil removal cover flows away downwards, bottom is provided with leading with gradient
Oil groove (3-3), so as to be walked from the lubricating oil that oil removal cover flows in oil guide groove to lower effluent.
3. the engine valve movement rule measuring device as described in claim 1 for being suitable for complicated mist environment, feature
Be, the gap (4-4) being connected to valve stem fixation hole (4-1) offered on the valve fixture block (4), be also provided with axis with
The vertical bolt fixing hole (4-5) of valve stem fixation hole (4-1) axis, is mounted on valve stem (5) with this in valve fixture block (4)
It is closed gap (4-4) by being driven through the bolt of bolt fixing hole (4-5) afterwards, so that valve fixture block (4) deforms, into
And it is fixed on valve fixture block (4) is reliable and stable on valve stem (5).
4. the engine valve movement rule as described in any one of claims 1-3 for being suitable for complicated mist environment measures dress
It sets, which is characterized in that the width of the gap (4-4) is 3-6mm.
5. the engine valve movement rule according to any one of claims 1-4 for being suitable for complicated mist environment measures dress
It sets, which is characterized in that the measuring surface (4-2) is surrounded by emptying chamfering, for making the lubricating oil being splashed in measuring surface
Quickly flow away.
6. the engine valve movement rule as described in any one in claim 1-5 for being suitable for complicated mist environment measures dress
It sets, which is characterized in that the oil unloading trough (4-6) is provided between measuring surface (4-2) and oil separating plate (4-3), the oil unloading trough (4-6)
The accumulation of the oil film in measuring surface is reduced jointly with oil separating plate (4-6) and emptying chamfering.
7. the engine valve movement rule as claimed in any one of claims 1 to 6 for being suitable for complicated mist environment measures dress
It sets, which is characterized in that the surrounding of the fixing seat (1) is offered for fixing seat to be fixed on the fixation that cylinder covers
Seat mounting hole (1-1), side offers the sensor mounting hole (1-2) for installing laser displacement sensor (2).
8. a kind of engine valve movement rule measurement method suitable for complicated mist environment, which is characterized in that including as follows
Step:
1) bolt and nut is loaded onto after valve fixture block (4) being mounted on valve stem (5), tightening bolt is closed gap, by gas
Door fixture block (4) is fixed on valve stem (5)；
2) on the engine by fixing seat (1) installation, the laser optical path oil removal cover (3) in laser displacement sensor (2) outer cup,
Then laser displacement sensor (2) is installed to fixing seat (1) corresponding position, so that laser displacement sensor (2) transmitting swashs
Light is vertically penetrated in the measuring surface of valve fixture block (4)；
3) start engine, laser displacement sensor (2), dynamic signal acquisition analysis system (6) and and dynamic signal acquisition
The connected computer of analysis system (6) starts the output signal for acquiring laser displacement sensor after engine operating condition is stablized, adopts
Stop acquiring and saving data after collection preset time, computer obtains the survey of engine valve movement rule according to the collected data
Amount.
9. the engine valve movement rule measurement method as claimed in claim 8 for being suitable for complicated mist environment, feature
It is, further includes following steps: 4) changes engine operating condition, acquire the output of corresponding laser displacement sensor under different operating conditions
Signal realizes the measurement of engine valve movement rule under different operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346405.5A CN109632313B (en) | 2018-11-13 | 2018-11-13 | Engine valve motion law measuring device and method for complex oil mist environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346405.5A CN109632313B (en) | 2018-11-13 | 2018-11-13 | Engine valve motion law measuring device and method for complex oil mist environment |
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| Publication Number | Publication Date |
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| CN109632313A true CN109632313A (en) | 2019-04-16 |
| CN109632313B CN109632313B (en) | 2020-02-21 |
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Citations (7)
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