CN207456778U - A kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism - Google Patents
A kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism Download PDFInfo
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- CN207456778U CN207456778U CN201721371107.2U CN201721371107U CN207456778U CN 207456778 U CN207456778 U CN 207456778U CN 201721371107 U CN201721371107 U CN 201721371107U CN 207456778 U CN207456778 U CN 207456778U
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- valve
- cylinder head
- valve actuating
- push rod
- cam
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Abstract
The utility model discloses a kind of secondary composite analogy experimental systems of the double frictions of valve actuating mechanism,Including motor,Belt,Fixed plate,Camshaft,Cam,Idler wheel,Tappet body,Valve actuating push rod,Valve,Cylinder head,Valve retainer and heating coil,Cam is connected with camshaft interference fit,Idler wheel is rotatablely connected with tappet body upper end by axis pin,Valve actuating push rod upper end is connected with tappet body,Lower end is connected with valve,Valve spring is arranged on valve actuating push rod,Cam forms higher pair friction pair with idler wheel under the elastic restoring force effect of valve spring,Cylinder head is equipped with valve guide bushing,Valve actuating push rod passes through valve guide bushing,Valve guide bushing lower end is equipped with valve retainer,Under the elastic restoring force effect of valve spring valve and valve retainer is made to form impact wear kinematic pair,Valve lower end cylinder head is internally provided with heating coil,Two pairs of secondary wear tests of friction are realized simultaneously,Stable structure is reliable,It is efficient,And simulation is approached with actual condition,Experimental data is effectively reliable.
Description
Technical field
The utility model belongs to the integrated experiment device technical field of multipair friction secondary motion and stress, specifically
It says, the utility model is related to a kind of secondary composite analogy experimental systems of the double frictions of valve actuating mechanism.
Background technology
In recent years, with the continuous progress of internal-combustion engine technology, vehicular engine is just towards high-power, low energy consumption, long-life
Direction develop, this development trend is built upon engine overall performance and is promoted on basis, at the same also to each system and
The comprehensive performance of parts proposes higher requirement.
Valve actuating mechanism is the important component of engine, is the extremely crucial component of engine, basic function be by
The requirement of working cycles and ignition order is carried out in each cylinder of motivation approved for distribution, timing opens and closes inlet and outlet door, makes fresh
Air can timely enter cylinder, and exhaust gas is discharged from cylinder.Camshaft is the power part for driving valve actuating mechanism, it is to ensure
Engine stabilizer, economy, the key of reliability operating.Cam is higher pair with tappet body idler wheel Contact Pair, is in valve actuating mechanism
Critical movements pair is usually operated under high temperature, high rotating speed, the effect of high alternation contact load, and since lubricating condition is severe, cam
Main failure forms with idler wheel are excessive wears.Abrasion the result is that directly result in that distribution is disorderly, intake and exhaust deficiency, charge system
Number declines, insufficient, exhaust gas inside cylinder pressure rise of burning, gas exchange loss increase, and engine power performance and economy are deteriorated, discharge
Horizontal superelevation.Therefore, in all kinds of model project development processes, the wear problem secondary to friction is all paid much attention to
Another pair critical movements pair in valve actuating mechanism is Valve-valve seat circle.Valve retainer and head portion that cooperation pair
Cylinder seals, and controls the sucking of fresh air and the discharge of exhaust gas, and valve retainer works in high stress, and (engine is most
High combustion pressure is up to 20MPa, spring force and dynamic loading pressure up to 130MPa), (inlet valve operating temperature generally exists high-temperature
200 DEG C -450 DEG C, for the operating temperature of exhaust valve generally at 600 DEG C -800 DEG C, some is even as high as 850 DEG C) and corrosion (high temperature combustion
Gas cut erosion, vulcanization, V2O5 corrosion and oxidation) property adverse circumstances in, be subjected at high temperature valve impact wear and
Erosion, oxidation of inlet and outlet stream etc., the failure of valve retainer shows as being seriously worn, valve deflection is excessive, poor air-tightness.
The rotation when rigging error of valve and opening and closing, and this abrasion is exacerbated, undue wear can cause Valve-valve seat circle pair
It fails, valve clearance disappears in extreme situations, and valve cannot take a seat, and combustion gas leaks out, and power significantly declines.The combustion leaked out
Gas may cause valve retainer to overheat or even ablation, and therefore, the research of Valve-valve seat circle polishing machine has become one urgently
Problem to be solved.
Research currently for valve actuating mechanism is summed up main there are two aspect, is on the one hand the design of parts, bag
Include cam profile, the design of Valve Rocker Organization, the design of the parts such as valve spring and valve, wherein again with cam profile
It designs particularly critical.On the other hand it is the dynamics problem of mechanism, and for the research of mechanism power performance, and be concentrated mainly on
In the characteristics of motion of valve.Foreign countries grind to the model of vibration of valve actuating mechanism, friction and port timing and variable valve timing etc.
Studying carefully has some reports.It is domestic to be also directed to studying the dynamic lubrication, non-right of more accurate valve model of vibration, cam tappet pair
Claim the problems such as fitting of cam profile and cam profile.However, for the secondary research work of two kinds of typical case's frictions in distribution mechanism
Work also lacks very much, and particularly rub secondary experimental study, has focused largely on the experiment of sample grade, could not use work condition environment and reality
The preferable part grade of coincideing experiment, on can be used part directly carry out friction-wear test report it is even more fewer and fewer.For
This, this patent can simulate the integrated experiment device of multipair friction secondary motion and stress by design, to be valve actuating mechanism
Two kinds of secondary researchs of typical case's friction provide the means and approach more to correspond to reality.
Utility model content
The utility model provides a kind of double frictions of valve actuating mechanism secondary composite analogy experimental system, while realizes two pairs of frictions
Secondary wear test, stable structure is reliable, efficient, and simulation is approached with actual condition, and experimental data is effectively reliable.
To achieve these goals, the technical solution that the utility model is taken is：A kind of double frictions of valve actuating mechanism are secondary compound
Experimental system for simulating, including motor, belt, fixed plate, camshaft, cam, idler wheel, tappet body, valve actuating push rod, valve, gas
Cylinder cap, valve retainer and heating coil, the output shaft of the motor are equipped with belt wheel one, and the camshaft is rotated with fixed plate
Connection, the camshaft mandrel end are equipped with belt wheel two, and described belt one end is connected with belt wheel one, and other end is connected with belt wheel two,
The cam is connected with camshaft interference fit, and the idler wheel is rotatablely connected with tappet body upper end by axis pin, and the valve pushes away
Bar upper end is connected with tappet body, and lower end is connected with valve, and valve spring, the cam and idler wheel are arranged on the valve actuating push rod
Higher pair friction pair is formed under the elastic restoring force effect of valve spring, the cylinder head is equipped with valve guide bushing, the valve
Push rod passes through valve guide bushing, and the valve guide bushing lower end is equipped with valve retainer, makes under the elastic restoring force effect of valve spring
Valve and valve retainer form impact wear kinematic pair, and valve lower end cylinder head is internally provided with heating coil, the cylinder
Lid is internally provided with cooling water cavity.
Preferably, the heating coil is heated to valve, valve retainer and cylinder head, temperature in cylinder when simulating fuel gas buring
Degree state, and cylinder temperature sensor is equipped in cylinder head.
Preferably, sliding bearing is equipped in the fixed plate, and is emphasis lubricant housings.
Preferably, recirculated cooling water is passed through in the cooling water cavity, and cooling-water temperature sensor is equipped on chilled(cooling) water return (CWR).
It is using the advantageous effect of above technical scheme：The secondary composite analogy experimental system of the double frictions of the valve actuating mechanism, motor
Driving pulley one rotates, and by belt driving pulley two with cam axle, cam rotates belt wheel one together with camshaft,
Cam pushing rolling wheels and valve spring elastic restoring force effect under, make valve actuating push rod with valve in valve guide bushing on
Lower reciprocating motion, and then the opening and closing of valve and valve retainer is driven, simulate the higher pair friction pair that cam is formed with idler wheel, simulation
The impact wear kinematic pair that valve is formed with valve retainer, wherein valve lower end cylinder head is internally provided with heating coil,
The heating coil is heated to valve, valve retainer and cylinder head, simulates cylinder temperature state during fuel gas buring, and in cylinder
Cylinder temperature sensor is equipped in lid, facilitates and records experimental data in human-computer interaction interface；It is passed through and follows in the cooling water cavity
Ring cooling water, and cooling-water temperature sensor is equipped on chilled(cooling) water return (CWR), water Xun Huan when simulated engine works so that experimental system
More meet actual condition, ensure the accuracy and reliability of experimental data；The experimental system is compact-sized, it is easy to accomplish,
Closer to engineering practice；In addition two pairs of secondary wear tests of friction can be completed simultaneously, stable structure is reliable, efficient,
It treats that test specimen is replaced conveniently, has a wide range of application.
Description of the drawings
Fig. 1 is the secondary composite analogy experimental system entirety assembling schematic diagram of the double frictions of the valve actuating mechanism；
Fig. 2 is valve and valve retainer scheme of installation；
Wherein：
1st, motor；2nd, belt；3rd, fixed plate；4th, camshaft；5th, cam；6th, idler wheel；7th, tappet body；8th, valve actuating push rod；
9th, valve；10th, cylinder head；11st, valve retainer；12nd, heating coil；1-1, belt wheel one；4-1, belt wheel two；8-1, valve spring；
10-1, valve guide bushing；10-2, cooling water cavity.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art have to the design of the utility model, technical solution it is more complete, accurate and
Deep understanding, and contribute to its implementation.
As shown in Figure 1 to Figure 2, the utility model is a kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism, simultaneously
Two pairs of secondary wear tests of friction are realized, stable structure is reliable, efficient, and simulation is approached with actual condition, experimental data
It is strong reliable.
Specifically, as shown in Figure 1 to Figure 2, including motor 1, belt 2, fixed plate 3, camshaft 4, cam 5, idler wheel
6th, tappet body 7, valve actuating push rod 8, valve 9, cylinder head 10, valve retainer 11 and heating coil 12, on the output shaft of the motor 1
Equipped with one 1-1 of belt wheel, the camshaft 4 is rotatablely connected with fixed plate 3, and 4 end of camshaft is equipped with two 4-1 of belt wheel, institute
It states 2 one end of belt to be connected with one 1-1 of belt wheel, other end is connected with two 4-1 of belt wheel, and the cam 5 is interference fitted with camshaft 4
Connection, the idler wheel 6 are rotatablely connected with 7 upper end of tappet body by axis pin, and 8 upper end of valve actuating push rod is connected with tappet body 7, under
End is connected with valve 9, valve spring 8-1 is arranged on the valve actuating push rod 8, the cam 5 is with idler wheel 6 in valve spring 8-1
Elastic restoring force effect under form that higher pair friction is secondary, and the cylinder head 10 is equipped with valve guide bushing 10-1, the valve actuating push rod 8
Through valve guide bushing 10-1, the valve guide bushing 10-1 lower ends are equipped with valve retainer 11, in the elastic restoring force of valve spring 8-1
Valve 9 and valve retainer 11 is made to form impact wear kinematic pair under effect, the 9 lower end cylinder head 10 of valve is internally provided with heating
Coil 12, the cylinder head 10 are internally provided with cooling water cavity 10-2.
As shown in Figure 1 and Figure 2, the heating coil 12 is heated to valve 9, valve retainer 11 and cylinder head 10, simulates combustion gas
Cylinder temperature state during burning, and cylinder temperature sensor is equipped in cylinder head 10.
As shown in Figure 1, being equipped with sliding bearing in the fixed plate 3, and it is emphasis lubricant housings.
As shown in Figure 1 and Figure 2, recirculated cooling water is passed through in the cooling water cavity 10-2, and water is equipped on chilled(cooling) water return (CWR)
Temperature sensor.
Specific working mode is illustrated with specific embodiment below：
The secondary composite analogy experimental system of the double frictions of the valve actuating mechanism, 1 driving pulley of motor, one 1-1 are rotated, and one 1-1 of belt wheel leads to
2 driving pulley of belt, two 4-1 is crossed to rotate with camshaft 4, cam 5 rotates together with camshaft 4,5 pushing rolling wheels 6 of cam with
And under the elastic restoring force effect of valve spring 8-1, make valve actuating push rod 8 past up and down in valve guide bushing 10-1 with valve 9
Multiple movement, and then the opening and closing of driving valve 9 and valve retainer 11 simulate the higher pair friction pair that cam 5 is formed with idler wheel 6, mould
The impact wear kinematic pair that valve 9 is formed with valve retainer 11 is intended, has added wherein 9 lower end cylinder head 10 of the valve is internally provided with
Heat coil 12, the heating coil 12 are heated to valve 9, valve retainer 11 and cylinder head 10, in cylinder when simulating fuel gas buring
State of temperature, and cylinder temperature sensor is equipped in cylinder head 10, it facilitates and records experimental data in human-computer interaction interface；Institute
It states and recirculated cooling water is passed through in cooling water cavity 10-2, and cooling-water temperature sensor is equipped on chilled(cooling) water return (CWR), simulated engine work
When water cycle so that experimental system more meets actual condition, ensures the accuracy and reliability of experimental data；The experiment
System structure is compact, it is easy to accomplish, closer to engineering practice；In addition the secondary abrasion examination of two pairs of frictions can be completed simultaneously
It tests, stable structure is reliable, efficient, treats that test specimen is replaced conveniently, has a wide range of application.
The utility model patent is related to the secondary comprehensive simulation test device of multipair friction, solves in engine valve actuating mechanism
The problem of two quasi-representatives friction pair (cam 5- idler wheels 6, valve 9- valve retainers 11) part grade wear test means, experiment carries
Lotus, environment and sample and real work state are sufficiently close to, and result of the test can not only provide for the optimization design of valve actuating mechanism
Data are supported, provide verification condition for the kinematics and dynamics analysis result of valve actuating mechanism, which can also be applied to
The durability certification test of valve actuating mechanism in new model project development process.In addition, experimental rig after optimization design, can be used
Make educational aid, give the student that undergoes training and more intuitively recognize and know from experience.
Overhead cam axle construction is connected to form an entirety by tappet body 7 with valve movement mechanism by the device, real
A set of mechanism analog two functional objective secondary to friction is showed.The output that the contact load of cam 5- idler wheels 6 comes from motor 1 is turned round
Square, the shock loading of valve 9- valve retainers 11 then come from the elastic force of valve spring 8-1.During experiment, camshaft 4 is arranged in
The torque sensor at end can measure the contact torque of cam 5- idler wheels 6 in real time.To avoid the inclined of valve 9 and valve retainer 11
Mill except installing longer valve guide bushing 10-1 additional, also installs linear bearing additional in 7 both sides of tappet body, ensure that 9 elevating movement of valve
Unlikely deflection.The apparatus structure is compact, manufacture is at low cost, service life is long, and transmission motion stabilization is reliable, the degree of automation
Height, being capable of the preferably movement of simulation valve actuating mechanism, stand under load, Service Environment.
The utility model is exemplarily described above in association with attached drawing, it is clear that the utility model implements not
It is limited by aforesaid way, as long as employ the various unsubstantialities that the methodology of the utility model and technical solution carry out
Improvement；Or it is not improved, above-mentioned design and technical solution by the utility model directly apply to other occasions, at this
Within the protection domain of utility model.
Claims (4)
1. a kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism, it is characterised in that：Including motor (1), belt (2), consolidate
Dead axle seat (3), camshaft (4), cam (5), idler wheel (6), tappet body (7), valve actuating push rod (8), valve (9), cylinder head (10),
Valve retainer (11) and heating coil (12), the output shaft of the motor (1) are equipped with belt wheel one (1-1), the camshaft (4)
It is rotatablely connected with fixed plate (3), camshaft (4) end is equipped with belt wheel two (4-1), described belt (2) one end and belt wheel
One (1-1) connections, other end are connected with belt wheel two (4-1), and the cam (5) connects with camshaft (4) interference fit, described
Idler wheel (6) is rotatablely connected with tappet body (7) upper end by axis pin, and valve actuating push rod (8) upper end is connected with tappet body (7), under
End is connected with valve (9), valve spring (8-1) is arranged on the valve actuating push rod (8), the cam (5) is with idler wheel (6) in gas
Higher pair friction pair is formed under the elastic restoring force effect of door spring (8-1), the cylinder head (10) is equipped with valve guide bushing (10-
1), the valve actuating push rod (8) passes through valve guide bushing (10-1), and valve guide bushing (10-1) lower end is equipped with valve retainer (11),
Under the elastic restoring force effect of valve spring (8-1) valve (9) and valve retainer (11) is made to form impact wear kinematic pair, institute
It states valve (9) lower end cylinder head (10) and is internally provided with heating coil (12), the cylinder head (10) is internally provided with cooling water cavity
(10-2)。
2. a kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism according to claim 1, it is characterised in that：It is described
Heating coil (12) simulates cylinder temperature shape during fuel gas buring to valve (9), valve retainer (11) and cylinder head (10) heating
State, and cylinder temperature sensor is equipped in cylinder head (10).
3. a kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism according to claim 1, it is characterised in that：It is described
Sliding bearing is equipped in fixed plate (3), and is emphasis lubricant housings.
4. a kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism according to claim 1, it is characterised in that：It is described
Recirculated cooling water is passed through in cooling water cavity (10-2), and cooling-water temperature sensor is equipped on chilled(cooling) water return (CWR).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721371107.2U CN207456778U (en) | 2017-10-20 | 2017-10-20 | A kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721371107.2U CN207456778U (en) | 2017-10-20 | 2017-10-20 | A kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism |
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| CN207456778U true CN207456778U (en) | 2018-06-05 |
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| CN201721371107.2U Expired - Fee Related CN207456778U (en) | 2017-10-20 | 2017-10-20 | A kind of secondary composite analogy experimental system of the double frictions of valve actuating mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560861A (en) * | 2017-10-20 | 2018-01-09 | 安徽工程大学 | A kind of double friction pair composite analogy experimental systems of valve actuating mechanism |
| CN109819805A (en) * | 2019-03-25 | 2019-05-31 | 四川大学 | A kind of automatic tobacco bagging device |
| CN113503197A (en) * | 2021-07-12 | 2021-10-15 | 哈尔滨工程大学 | Marine cam-tappet pair elastohydrodynamic lubrication analysis method considering structural vibration |
-
2017
- 2017-10-20 CN CN201721371107.2U patent/CN207456778U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560861A (en) * | 2017-10-20 | 2018-01-09 | 安徽工程大学 | A kind of double friction pair composite analogy experimental systems of valve actuating mechanism |
| CN109819805A (en) * | 2019-03-25 | 2019-05-31 | 四川大学 | A kind of automatic tobacco bagging device |
| CN113503197A (en) * | 2021-07-12 | 2021-10-15 | 哈尔滨工程大学 | Marine cam-tappet pair elastohydrodynamic lubrication analysis method considering structural vibration |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20181020 |
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| CF01 | Termination of patent right due to non-payment of annual fee |