CN105910811A - Cam tappet wearing test device - Google Patents
Cam tappet wearing test device Download PDFInfo
- Publication number
- CN105910811A CN105910811A CN201610389968.7A CN201610389968A CN105910811A CN 105910811 A CN105910811 A CN 105910811A CN 201610389968 A CN201610389968 A CN 201610389968A CN 105910811 A CN105910811 A CN 105910811A
- Authority
- CN
- China
- Prior art keywords
- cam
- tappet
- axle sleeve
- push rod
- handwheel
- 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.)
- Pending
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0266—Cylindrical specimens
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a cam tappet wearing test device. The device comprises an engine body, a cam, a tappet, a push rod, a cam driving device and a loading device applying an axial load to the push rod. The cam driving device is connected to the cam. The engine body is provided with a sliding assembling hole. The tappet is connected to the sliding assembling hole. The cam is contacted with one end surface of the tappet. The other end of the tappet is connected to the push rod. In the invention, a major friction pair, which is a cam-tappet friction pair, is taken as a research object in a valve timing mechanism, and a contact condition between the cam and the tappet under different loads can be tested. Simultaneously, the device possesses advantages that the structure is simple; operation is easy and manufacturing and testing cost is low; disadvantages that an engine whole machine test is complex and an actual engine integration investigation period is long are avoided; and a wearing characteristic test of a specific friction pair in a very short test period can be completed.
Description
Technical field
The present invention relates to a kind of abrasion test device, be specifically related to a kind of cam tappet abrasion examination
Experiment device.
Background technology
Cam, tappet are the important composition parts of engine valve actuating mechanism, its working forms pair
The normal work of valve actuating mechanism creates important impact.Valve actuating mechanism is as the three of electromotor
One of great institutions, Main Function is according to the cycle of operation carried out in each cylinder of electromotor or to send out
The requirement of fire order, opens and closes the inlet and outlet door of each cylinder according to certain rules, promotes
Fresh fuel gas (gasoline engine) or air (diesel engine) inlet and outlet timely and accurately
Cylinder, it is achieved the scavenging period of electromotor, to ensure that under different operating mode, electromotor can have been given play to
Optimum performance.The appropriate design of valve actuating mechanism and normal work will directly affect electromotor in reality
Reliability, economy, stationarity and durability etc. in the work of border.
The friction pair that valve actuating mechanism comprises mainly cam-tappet friction pair, tappet-push rod rub
Wiping secondary, push rod-rocking arm friction pair and rocking arm-valve friction pair, wherein, cam-tappet rubs
Wiping secondary impact maximum in valve actuating mechanism weares and teares, can directly influence valve actuating mechanism normal work
Make, but the domestic and international research to cam, tappet abrasion condition focuses primarily upon the choosing of parts
In the polishing machine of material and material, have ignored the impact of actual working environment, to cam with very
Cooperation research between post is less, does not accounts for the impact of many varying loads in actual condition.
And common overall test cam-tappet friction pair is not made system for research,
Especially when load difference, the situation of change of touching act between parts, and exist examine
Examine excessive cycle, the problems such as installation parts are complicated, high cost.
Summary of the invention
For technical problem present in prior art, it is an object of the invention to: one is provided
Cam tappet abrasion test device.
The purpose of the present invention is achieved through the following technical solutions: a kind of cam tappet wear test
Device, including body, cam, tappet, push rod, cam driving gear and executes to push rod
Adding the charger of axial load, cam driving gear is connected with cam, and body is provided with
Slidable fit hole, tappet is connected in slidable fit hole, and cam contacts with tappet end face,
The tappet other end is connected with push rod.
Preferably, described charger includes handwheel, compression spring and axle sleeve, on body
Having handwheel screwed hole, handwheel is connected with handwheel screwed hole, radial projection on axle sleeve one end
Have flange, compression spring to be set in outside axle sleeve, compression spring two ends respectively with flange and handwheel
Connecting, push rod is connected with axle sleeve.
Preferably, being additionally provided with push rod bindiny mechanism, push rod bindiny mechanism includes screw rod, spiral shell
Bar is connected in the trepanning of axle sleeve, and pusher section puts in the trepanning of axle sleeve, and push rod stretches out in
Axle sleeve part is connected with tappet.
Preferably, described push rod bindiny mechanism also includes nut, and screw portion is connected to axle sleeve
Trepanning in, nut is connected to screw rod and stretches out in the part of axle sleeve.
Preferably, being additionally provided with swivel nut, body offers installation opening, swivel nut outside wall surface sets
Having external screw thread, handwheel screwed hole to be arranged in the trepanning of swivel nut, swivel nut is installed by external screw thread
In installation opening, handwheel is connected with handwheel screwed hole.
Preferably, described handwheel includes wheel body and handle, and wheel body is protruding with connecting portion,
Connecting portion outer surface offers screw thread, and connecting portion axially offers through hole, and axle sleeve puts in through hole
In, connecting portion is threadedly attached in handwheel screwed hole.
Preferably, being additionally provided with lubricating arrangement, lubricating arrangement includes oil storage and main oil transportation
Pipe, main petroleum pipeline is connected with oil storage, and main petroleum pipeline is extended with secondary petroleum pipeline, main oil transportation
Pipe oil-out, towards the contact position of cam Yu tappet, slidable fit hole hole wall offers multiple
Oil groove, secondary petroleum pipeline connects with oil groove.
Preferably, being additionally provided with machine body cover, described body offers body chamber, cam sets
Being placed in body chamber, body correspondence body chamber position offers lid installing port, and machine body cover leads to
Cross and be threadedly coupled in lid installing port.
Preferably, main petroleum pipeline is provided with switch valve, secondary petroleum pipeline is provided with switch
Valve, the bottom of body offers oil outlet.
Preferably, being additionally provided with foil gauge, foil gauge is arranged between compression spring and flange.
The present invention has such advantages as relative to prior art and effect:
1, the present invention is directed to topmost friction pair cam-tappet friction in valve actuating mechanism
Pair is object of study, can survey the situation that contacts between cam with tappet under different loads
Examination, meanwhile, the present invention also has simple in construction, easily operated and manufacture testing cost is low
Advantage, it is to avoid deficiency that electromotor overall test is complicated and real engine integrated survey week
The shortcoming that phase is long, can complete the wearing character of specific friction pair within the extremely short test period
Test.
2, the present invention can be with simulated engine under different operating modes, and cam contacts shape with tappet
Condition, it is ensured that the change of convenient regulation service load in laboratory conditions, in whole load
Cam-tappet friction pair can be tested under lotus gradient, thus probe into cam-tappet and rub
Wiping secondary friction and wear behavior, provide reliable basis to actual production, the present invention is also simultaneously
Load between cam and tappet can be monitored in real time, in order to analyze load change
Impact on cam-tappet friction pair abrasion condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the sectional view in Fig. 1 at A-A.
Fig. 3 is the schematic diagram that the foil gauge of the present invention is uniformly arranged on flange.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but this
Bright embodiment is not limited to this.
Embodiment one:
A kind of cam tappet abrasion test device, including body 1, cam 2, tappet 3, push rod
4, cam driving gear 5 and the charger to push rod applying axial load, actuated by cams
Device is connected with cam, and body is provided with slidable fit hole, and tappet is connected to slidable fit
Kong Zhong, the protruding end 26 of cam contacts with tappet end face, the tappet other end and push rod phase
Connect.Preferably, described cam driving gear is motor.
Preferably, described charger includes handwheel 6, compression spring 7 and axle sleeve 8, body
On there is handwheel screwed hole, handwheel is connected with handwheel screwed hole, radially prominent on axle sleeve one end
Rise have flange 9, compression spring is set in outside axle sleeve, compression spring two ends respectively with flange and hands
Wheel connects, and push rod is connected with axle sleeve.
Preferably, body side offers installation opening, and opposite side offers body chamber 10, machine
Body correspondence body chamber position offers lid installing port, is additionally provided with swivel nut 11 and machine body cover
12, swivel nut outside wall surface is provided with external screw thread, and handwheel screwed hole is arranged in the trepanning of swivel nut, spiral shell
Set is installed in installation opening by external screw thread, and handwheel is connected with handwheel screwed hole, and cam is arranged
In body chamber, machine body cover is threadedly attached in lid installing port.
Preferably, be additionally provided with push rod bindiny mechanism, push rod bindiny mechanism include screw rod 13 with
And nut 14, screw rod is connected in the trepanning of axle sleeve, and pusher section puts in the trepanning of axle sleeve,
Push rod stretches out in axle sleeve part and is connected with tappet.Preferably, screw portion is connected to axle sleeve
Trepanning in, nut is connected to screw rod and stretches out in the part of axle sleeve.
By being connected in the trepanning of axle sleeve by screw rod, rotary screw makes screw rod at trepanning axis
Adjust, to adapt to the push rod of different length so that it is accurately load, and arrange to mobile
It is loosening that nut can prevent screw rod from producing, it is to avoid owing to screw bolt loosening causes affecting imposed load
Accuracy.
Preferably, described handwheel includes wheel body and handle 15, and wheel body is protruding with connecting portion
16, connecting portion outer surface offers screw thread, and connecting portion axially offers through hole, and axle sleeve puts in
In through hole, connecting portion is threadedly attached in handwheel screwed hole, compression spring and connecting portion
Connect.
Preferably, being additionally provided with lubricating arrangement, lubricating arrangement includes that oil storage 17 and master are defeated
Oil pipe 18, main petroleum pipeline is connected with oil storage, and main petroleum pipeline is extended with secondary petroleum pipeline 19,
Described main petroleum pipeline protrude in body chamber and main petroleum pipeline oil-out towards cam protruding end with
The contact position of tappet, slidable fit hole hole wall offers multiple oil groove 20, secondary petroleum pipeline with
Oil groove connects.
Preferably, main petroleum pipeline is provided with switch valve 21, secondary petroleum pipeline is provided with out
Closing valve 22, the bottom of body offers oil outlet 23.
Switch valve scalable always exports the oil mass of lubricating oil, switch valve scalable pair petroleum pipeline
Flow, it is seen that switch valve and switch valve can control lubricating oil and add in right amount.
Preferably, being additionally provided with multiple foil gauge 25, foil gauge is uniformly arranged on compression spring
And between flange.
The work process of the present invention and operation principle: during use, open machine body cover, by cam
Being installed on motor output shaft, motor can be disposed on outside body chamber, and motor output shaft
Put in body chamber, after cam installation, machine body cover is placed on lid installing port；Logical
Cross installation opening to be loaded in slidable fit hole by tappet, then swivel nut is loaded installation opening, will add
Carry to put and be installed in installation opening, i.e. complete the installation of cam and tappet.
Rotation hand wheel, makes handwheel connecting portion move to compression spring, and compression spring is pressed to axle
Set applies axial load, and axle sleeve transfers load to push rod by screw rod, and push rod is by load
It is applied between tappet and cam, meanwhile, the foil gauge between compression spring and flange
Measure the change of institute's imposed load, it is achieved the real-time monitoring to institute's imposed load, thus suitable
When adjust handwheel to discharge required load.Starting motor, driven by motor cam revolves simultaneously
Turning, cam produces rubbing action with tappet, and motor speed is adjustable, thus achieves cam
And load and the most adjustable advantage of rotating speed between tappet, it is possible to simulation multi-state under, cam with
Simulation between tappet.
Additionally, screw rod can realize in the trepanning of axle sleeve axial by the screw thread of its outer surface
Adjustment, thus adapt to the push rod of different length.
Lubricating arrangement in the present invention has main petroleum pipeline and secondary petroleum pipeline, and main petroleum pipeline flows to
Wear and tear the contact site between the most serious cam and tappet, can be changed by switch valve
Fuel delivery under different operating modes, thus probe into lubricating oil to cam and tappet wear condition
Impact；And pair petroleum pipeline flows in oil groove, play lubrication effect, prevent body to be heated
Expand, affect the positional precision of tappet.
The bottom of body offers oil outlet respectively in various location, facilitates the stream of lubricating oil
Go out, it is ensured that cleaning in body.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are also
Being not restricted to the described embodiments, other any spirit without departing from the present invention is with former
Change that reason is lower to be made, modify, substitute, combine, simplify, all should be the displacement side of equivalence
Formula, within being included in protection scope of the present invention.
Claims (10)
1. a cam tappet abrasion test device, it is characterised in that: include body, cam,
Tappet, push rod, cam driving gear and the charger to push rod applying axial load,
Cam driving gear is connected with cam, and body is provided with slidable fit hole, and tappet is connected to
In slidable fit hole, cam contacts with tappet end face, and the tappet other end is connected with push rod
Connect.
Cam tappet abrasion test device the most according to claim 1, its feature exists
In: described charger includes handwheel, compression spring and axle sleeve, and body has handwheel
Screwed hole, handwheel is connected with handwheel screwed hole, and on axle sleeve one end, radial projection has flange,
Compression spring is set in outside axle sleeve, and compression spring two ends are connected with flange and handwheel respectively, push away
Bar is connected with axle sleeve.
Cam tappet abrasion test device the most according to claim 2, its feature exists
In: being additionally provided with push rod bindiny mechanism, push rod bindiny mechanism includes that screw rod, screw rod are connected to
In the trepanning of axle sleeve, pusher section puts in the trepanning of axle sleeve, and push rod stretches out in axle sleeve part
It is connected with tappet.
Cam tappet abrasion test device the most according to claim 3, its feature exists
In: described push rod bindiny mechanism also includes nut, and screw portion is connected in the trepanning of axle sleeve,
Nut is connected to screw rod and stretches out in the part of axle sleeve.
Cam tappet abrasion test device the most according to claim 2, its feature exists
In: being additionally provided with swivel nut, body offers installation opening, swivel nut outside wall surface is provided with external screw thread,
Handwheel screwed hole is arranged in the trepanning of swivel nut, and swivel nut is installed in installation opening by external screw thread,
Handwheel is connected with handwheel screwed hole.
Cam tappet abrasion test device the most according to claim 2, its feature exists
In: described handwheel includes wheel body and handle, and wheel body is protruding with connecting portion, outside connecting portion
Surface offers screw thread, and connecting portion axially offers through hole, and axle sleeve puts in through hole, connects
Portion is threadedly attached in handwheel screwed hole.
Cam tappet abrasion test device the most according to claim 1, its feature exists
In: being additionally provided with lubricating arrangement, lubricating arrangement includes oil storage and main petroleum pipeline, main defeated
Oil pipe is connected with oil storage, and main petroleum pipeline is extended with secondary petroleum pipeline, main petroleum pipeline oil-out
Towards the contact position of cam Yu tappet, slidable fit hole hole wall offers multiple oil groove, secondary
Petroleum pipeline connects with oil groove.
Cam tappet abrasion test device the most according to claim 1, its feature exists
In: being additionally provided with machine body cover, described body offers body chamber, cam is arranged at body
In chamber, body correspondence body chamber position offers lid installing port, and machine body cover is by screw thread even
Receive in lid installing port.
Cam tappet abrasion test device the most according to claim 7, its feature exists
In: it is provided with switch valve on main petroleum pipeline, secondary petroleum pipeline is provided with switch valve, body
Bottom offer oil outlet.
Cam tappet abrasion test device the most according to claim 2, its feature exists
In: being additionally provided with foil gauge, foil gauge is arranged between compression spring and flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610389968.7A CN105910811A (en) | 2016-06-01 | 2016-06-01 | Cam tappet wearing test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610389968.7A CN105910811A (en) | 2016-06-01 | 2016-06-01 | Cam tappet wearing test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105910811A true CN105910811A (en) | 2016-08-31 |
Family
ID=56743198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610389968.7A Pending CN105910811A (en) | 2016-06-01 | 2016-06-01 | Cam tappet wearing test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105910811A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855447A (en) * | 2016-12-27 | 2017-06-16 | 潍柴动力股份有限公司 | The method of Real-time Collection push rod stress and the system of Real-time Collection push rod stress |
| CN111077067A (en) * | 2020-01-16 | 2020-04-28 | 东南大学 | Wet-type disc friction plate friction coefficient measuring device and measuring method |
| CN112326487A (en) * | 2020-10-29 | 2021-02-05 | 河南科技大学 | Current-carrying friction test device and method for conductive brush wire |
| CN113945307A (en) * | 2021-10-08 | 2022-01-18 | 哈尔滨工程大学 | Sensor and method for measuring contact force of cam tappet of engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855447A (en) * | 2016-12-27 | 2017-06-16 | 潍柴动力股份有限公司 | The method of Real-time Collection push rod stress and the system of Real-time Collection push rod stress |
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| CN111077067A (en) * | 2020-01-16 | 2020-04-28 | 东南大学 | Wet-type disc friction plate friction coefficient measuring device and measuring method |
| CN112326487A (en) * | 2020-10-29 | 2021-02-05 | 河南科技大学 | Current-carrying friction test device and method for conductive brush wire |
| CN113945307A (en) * | 2021-10-08 | 2022-01-18 | 哈尔滨工程大学 | Sensor and method for measuring contact force of cam tappet of engine |
| US20230110677A1 (en) * | 2021-10-08 | 2023-04-13 | Harbin Engineering University | Sensor for measuring cam and tappeta contact force of engine and measuring method |
| US11821800B2 (en) * | 2021-10-08 | 2023-11-21 | Harbin Engineering University | Sensor for measuring cam and tappet contact force of engine and measuring method |
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Application publication date: 20160831 |
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