CN206671105U - A kind of double valve valve retainer abrasion test device - Google Patents
A kind of double valve valve retainer abrasion test device Download PDFInfo
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- CN206671105U CN206671105U CN201720367692.2U CN201720367692U CN206671105U CN 206671105 U CN206671105 U CN 206671105U CN 201720367692 U CN201720367692 U CN 201720367692U CN 206671105 U CN206671105 U CN 206671105U
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Abstract
The utility model discloses a kind of double valve valve retainer abrasion test device, it solves in the prior art that experimental rig is complicated, and the problem of be not inconsistent with exhaust valve actual condition, has simple in construction, easy to disassemble, the advantage of energy-saving and environment friendly, its scheme are as follows：A kind of double valve valve retainer abrasion test device, located at the cylinder cap of testing stand, double gas gate passageway is provided with cylinder cap, cylinder cap is provided with exhaust valve seat insert in exhaust valve channel bottom, sets cam action executing agency to drive exhaust valve actuation at the top of exhaust valve；The cylinder body of cylinder is simulated, cylinder body is supported by testing stand and communicated at the top of cylinder body with cylinder cap bottom, and cylinder body is provided with air inlet, and air inlet is connected with inflation mechanism；Heating arrangements, heating arrangements are located at inner surface of cylinder block or outer surface, so that the temperature of setting is heated and be heated to gas in cylinder body and cylinder body, to simulate cylinder running, after test of many times, pass through the abrasion of naked eyes or scanning electron microscope observation exhaust valve exhaust valve seat insert.
Description
Technical field
Technical field of internal combustion engines is the utility model is related to, more particularly to a kind of double valve-valve retainer wear test
Device.
Background technology
Valve-valve retainer is to ensure engine power performance as gasoline engine, the executive component of Valve Gear of Diesel
Energy, economic performance, the strength member of reliability and durability.In diesel engine, exhaust valve-valve retainer is in high temperature, high compression ring
Worked under border, condition of work is very severe.They will not only bear at a high speed the frequently work of impact, the tension and compression of alternation and thermal stress
With also subject to the souring of high-speed fuel gas.This requires inlet and outlet door in addition to elevated temperature strength, should also have
Resistance to anti-thread breakage and wear resistance.Nowadays, as the further reinforcing of diesel engine, valve-valve retainer wear failure problem are got over
More to protrude, cause the highest attention of each Diesel Engine Plant.
If valve-valve retainer abrasion, valve sink, valve clearance is disappeared, and valve can not be taken a seat, and combustion gas is spilt, and is started
Acc power declines, and influences to use；Meanwhile the combustion gas spilt may cause valve retainer to overheat, or even ablation.Often valve actuating mechanism
, it is necessary to carry out overall test after going wrong and improving, substantial amounts of manpower and materials are expended, complete machine is reduced as far as possible so having at present
Long duration test, more utilize the trend of quick, reproducible device.It is modern to valve-valve retainer wearing character evaluation compared with
It is standard slide device or shock-slide device for common mode, above test method only only accounts for the wearability of material,
Engine valve-valve retainer real work situation is not contemplated, scene directly uses fuel gas buring, pollutes air
Weight, test of many times, financial cost is higher, moreover, multiple inlet valves, exhaust valve are carried in one cylinder of existing oil-burning machine, two
Being arranged under the working environment of complexity for exhaust valve, exists and influences each other, if only trying an exhaust valve-valve retainer
Test, do not account for the correlation of the two, therefore, existing experiment is not inconsistent with actual oil-burning machine operating mode, test direction meaning compared with
It is low.
Therefore, it is necessary to carry out research and design to a kind of new double valve-valve retainer abrasion test device.
Utility model content
For overcome the deficiencies in the prior art, the utility model provides a kind of double valve-valve retainer wear test
Device, the device are directed to double valve, it is contemplated that and influencing each other between double valve, whole experimental rig are detachably set,
It is easy to the dismounting and installation to exhaust valve, exhaust valve seat insert, experimental rig repeats availability height, is consistent with actual condition right
It is high.
A kind of concrete scheme of double valve-valve retainer abrasion test device is as follows：
A kind of double valve-valve retainer abrasion test device, including：
Located at the cylinder cap of testing stand, double gas gate passageway is provided with cylinder cap, exhaust door is provided with exhaust outlet to discharge gas
Body, each be vented in door set exhaust valve, and cylinder cap is provided with exhaust valve seat insert in exhaust valve channel bottom, is set at the top of exhaust valve
Cam action executing agency is put to drive exhaust valve actuation；
Simulate the cylinder body of cylinder, cylinder body is supported by testing stand and communicated at the top of cylinder body with cylinder cap bottom, cylinder body be provided with into
Gas port, air inlet are connected with inflation mechanism；
Heating arrangements, heating arrangements are located at inner surface of cylinder block or outer surface, so that gas in cylinder body and cylinder body is heated and added
Heat to setting temperature, to simulate cylinder running, after test of many times, by naked eyes or scanning electron microscope observation exhaust valve-
The abrasion of exhaust valve seat insert.Evaluation is made to engine valve-valve retainer wearability by observed result, instruct valve-
The design of valve retainer, the pressure of cylinder interior when inflation mechanism pours the pressure of setting into cylinder body to simulate cylinder operation,
And during simulating cylinder acting, the pressure of exhaust valve is awarded, whole device can effectively realize exhaust valve-valve retainer building ring
The simulation in border, without overall test, can effectively save cost, shorten the construction cycle.
Specifically, valve-valve retainer abrasion is divided into three kinds of adhesive wear, abrasive wear and plastic deformation wear, corresponding
Different wear forms.Valve-valve retainer after experiment is with the naked eye subjected to visual inspection, and seen using ESEM etc.
Examine it and organize crystalline phase, judge the reason for valve-seat ring wears, and valve actuating mechanism is made improvements according to wear reason.
The heating arrangements are electromagnetic heating coil, and electromagnetic heating coil is located at the lower surface of the cylinder body, Electromagnetic Heating
Coil is looped around cylinder body lower surface in multi-turn, and to realize the quick heating to cylinder body, electromagnetic heating coil is with respect to fuel gas buring more
Add environmental protection, energy-conservation.
For the operating environment closer to exhaust valve in actual condition, the cam action executing agency is included located at experiment
Cam inside platform, cam are connected with rotating mechanism, and cam contacts with tappet, and tappet is located in the open slot on testing stand surface,
Push rod is set in tappet, push rod is fixed by rocking arm and exhaust valve top, wherein, rotating mechanism is that electric rotating machine is for example electronic
Machine, cam move and then drive tappet to move up and down, and push rod is obliquely installed, and then with motion rocker arm in set angle internal rotation, from
And exhaust valve is set to do do action up and down.
Hollow setting in the middle part of tappet, described push rod one end is in tappet, and the other end is fixed on rocking arm side, and rocking arm is another
Side is acted by air valve bridge with fixed at the top of described exhaust valve, while to realize double valve.
In order to be consistent with the working environment of exhaust valve-exhaust valve seat insert in actual condition, the cylinder interior is being arranged
Valve retainer sidepiece is provided with exhaust valve seat insert cooling chamber, and exhaust valve seat insert cooling chamber is connected with cooling duct to be passed through gas or liquid
Body cools down to exhaust valve seat insert；
Also include control unit, control unit and described cam action executing agency, inflation mechanism and heating arrangements point
Do not connect not individually, with the pressure of gas in the action control cylinder body according to exhaust valve.
The entrance of cooling duct is connected by pipeline with cooling blower, and cooling blower is independent with control unit, passes through control
Unit controls the unlatching or stopping of cooling blower.
Further, exported in cooling duct and seat ring cooling chamber outlet temperature sensor is set, the temperature sensor is with after
Continuous control unit connection, control unit are collected into temperature in the cooling duct that the temperature sensor detects, to control cooling
The rotation of blower fan.
The cylinder body also sets up pressure sensor and temperature sensor, pressure sensor, temperature sensor with it is described
Control unit individually connects, by control unit to cylinder body temperature, the collection of pressure information, so as to control inflation mechanism
With heating arrangements, and realize that burning is to pressure simulation caused by exhaust valve during simulation cylinder acting, realize and diesel engine
The real simulation of working condition.
In order to ensure raising and landing for exhaust valve, valve spring is set in the exhaust door, the one of valve spring
End is fixed with valve collet, and the other end offsets with cylinder.
In order to ensure the rising of exhaust valve and landing, the rocking arm has the distance of setting with the cylinder lid surface, and rocking arm leads to
Cross support to be fixed on cylinder lid surface or fix by support and testing stand, and then be arranged above cylinder cap.
For overcome the deficiencies in the prior art, the utility model additionally provides a kind of exhaust valve-exhaust valve seat insert that improves and set
The method for counting structure, this method can effective auxiliary judgment exhaust valve-valve retainer wear form, be exhaust valve-valve retainer
Improvement give and instruct, test method comprises the following steps that：
1) a kind of described double valve-valve retainer abrasion test device is used to the structure of design；
2) after testing setting time, stop；
3) exhaust valve and exhaust valve seat insert are dismantled, is determined with the wear form to exhaust valve and exhaust valve seat insert, really
After fixed, improve exhaust valve again or exhaust valve seat insert is tested again.
Compared with prior art, the beneficial effects of the utility model are：
1) off-line test valve-valve can be used for by the setting of each mechanism, whole device in the utility model device
The research of seat ring wearing character, complete machine long duration test is compared, save a large amount of manpower, material resources and financial resources.
2) present apparatus is the simplified model, each critical component, valve clearance, valve spring pretightning force etc. of actual valve actuating mechanism
All structural parameters are consistent with primary motivation, and state is consistent with reality in cylinder during air valve drop, and it is cold to consider actual seat ring
But the influence of water cavity counter race, influencing each other between dual valve, therefore obtain result and approached with legitimate reading, to actual design
Manufacture has certain guidance meaning.
3) control solenoid current size can be achieved, motor turns by the setting of control unit in the utility model
Speed, seat ring cooling fan rotating speed, it is more simple and easy to compare control burning construction valve operation atmosphere；In addition, the present apparatus is not produced
Raw burning pollutant, it is green.
4) present apparatus may be reused, convenient disassembly, simple and practical, while test two groups of valve-valve retainers, section
Save time.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is double valve-valve retainer abrasion test device and control system complete layout；
Fig. 2 is abrasion test device profile；
Fig. 3 is the enlarged drawing in abrasion test device at A in Fig. 2；
Fig. 4 is that seat ring cools down schematic diagram；
Fig. 5 is cylinder cover bottom surface schematic diagram；
Fig. 6 is center housing temperature control schematic diagram；
Fig. 7 is cylinder pressure control schematic diagram；
Fig. 8 is camshaft speed control schematic diagram；
Fig. 9 is exhaust valve seat insert cooling chamber outlet temperature control schematic diagram；
Wherein, 1. cam shaft fixing device, the camshaft of 2. strap cams, 3. tappets, 4. testing stands, 5. cooling blowers, 6.
Push rod, 7. bulbs, 8. rocking arms, 9. ball cups, 10. air valve bridges, 11. exhaust valves, 12. valve collets and valve tumbler, 13.
Valve spring, 14. valve guide bushings, 15. seat ring cooling chamber outlet temperature sensors, 16. exhaust ducts, 17. nuts, 18. bolts,
19. electromagnetic heating coil power line, 20. cylinder bodies, the gas tube of 21. provided with electromagnetic valve, 22. pressure sensors, 23. exhaust valve seats
Circle, 24. exhaust valve seat insert cooling chambers, 25. temperature sensors, 26. gas tube magnetic valves, 27. electromagnetic heating coils, 28. electromagnetism
Heating coil power line fixing bolt, the cooling gas import of 29. exhaust valve seat inserts, 30. cylinder caps, 31. exhaust valve seat inserts cooling gas go out
Mouthful, 32. cylinder head fixing stud holes, 33. exhaust doors.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this Shen
It please propose a kind of double valve-valve retainer abrasion test device.
In a kind of typical embodiment of the application, as depicted in figs. 1 and 2, a kind of double valve-valve retainer abrasion
Experimental rig, mainly include：Cam shaft fixing device 1, the camshaft 2 of strap cam, tappet 3, testing stand 4, cooling blower 5, push away
Bar 6, bulb 7, rocking arm 8, ball cup 9, air valve bridge 10, exhaust valve 11, valve collet and valve tumbler 12, valve spring
13rd, valve guide bushing 14, seat ring cooling chamber outlet temperature sensor 15, exhaust duct 16, cylinder cap are fixed with nut 17 and bolt 18, electricity
Magnetic heating coil 27, cylinder body 20, the gas tube 21 of provided with electromagnetic valve, pressure sensor 22, exhaust valve seat insert 23, exhaust valve seat insert are cold
But chamber 24, temperature sensor 25, the electromagnetic heating coil 27 with hole, cylinder cap 30.
Camshaft is fixed by the cam shaft fixing device 1 on testing stand 4 and is connected with motor, has guarantor on testing stand 4
The pilot hole or open slot in the direction of motion of tappet 3 are demonstrate,proved, push rod 6 is placed on the intracavitary of tappet 3, and passes through bulb 7 with rocking arm 8
Connection, rocking arm 8 is fixed on cylinder cap 30 by rocker arm support, and is connected by bulb 7, ball cup 9 with air valve bridge 10, air valve bridge
10 drive two exhaust valve movements simultaneously, ensure the direction of motion by valve guide bushing 14, exhaust valve 11 is revolved by valve collet and valve
Rotation mechanism 12 is connected with valve spring 13, ensures the initial tension of spring under truth, exhaust valve 11 is by being vented door 33
Loaded in cylinder cap 30, exhaust valve seat insert 23 is arranged in cylinder cap 30, and under static, valve spring pretightning force, which acts on, makes row on valve
Valve 11 compresses with exhaust valve seat insert 23.Cylinder cap 30 is arranged on testing stand 4 by cylinder head fixing stud hole 32, on testing stand 4
Have and be welded on cylinder bore identical hole, cylinder body 20 on testing stand 4.There are electromagnetic heating coil 27, TEMP on cylinder body 20
The gas tube 21 of device, pressure sensor and provided with electromagnetic valve, gas tube are connected with aeration blower fan to provide the gas mould of setting pressure
Intend inner pressure of air cylinder.
Wherein, valve tumbler is arranged in actual engine valve actuating mechanism, in order to allows valve rotation, clearly
Except valve carbon distribution, the present apparatus remains this partial devices, it is intended to consider valve rotating device whether can normal work, if can not be just
Often work, can cause valve eccentric wear, influence to use in practice.
In order to ensure the rising of exhaust valve and landing, rocking arm 8 has the distance of setting with the surface of cylinder cap 30, and rocking arm passes through support
It is fixed on cylinder lid surface or is fixed by support and testing stand, and then is arranged above cylinder cap.
Electromagnetic heating coil 27 is fixed on cylinder body lower surface by fixing bolt, or, electromagnetic heating coil 27 is located at cylinder
Internal portion, there is the height of setting apart from cylinder base, heating effect is more direct, and cold air is filled with from air inlet, then passes through
Heating wire up walks to heat exhaust valve, exhaust valve seat insert, and electromagnetic heating coil 27 is supported in cylinder body by metal high temperature stent
Inside, or both sides are fixedly connected with inboard wall of cylinder block, and the power line of electromagnetic heating coil 27 is spread out of by cylinder base, power line
Fixed by electromagnetic heating coil power line fixing bolt 28, cylinder interior is consistent with shape in actual cylinder, push rod 6
Upper end is obliquely installed towards cylinder cap 30, and space is carried in the adjacent turn of electromagnetic heating coil 27, in order to which air heats backward upload
Progressive and heating cylinder body, exhaust valve and exhaust valve seat insert.
Device also includes control unit, and control unit is distinguished with motor, the magnetic valve of gas tube and electromagnetic heating coil
Individually connection, with the pressure of gas in the action control cylinder body according to exhaust valve.The cylinder interior is in exhaust valve seat insert sidepiece
Provided with exhaust valve seat insert cooling chamber 24, exhaust valve seat insert cooling chamber 24 communicates with cooling duct, simulates truth cooling water pair
The cooling effect of valve retainer, cooling duct is entered from cylinder cap side, and at opposite side, middle part is around exhaust valve seat insert cooling chamber 24
An annular is formed, cooling duct side cools down gas import 29 close to what cooling blower 5 was set for exhaust valve seat insert, and opposite side is
Exhaust valve seat insert cooling gas outlet 31, exports in cooling duct and sets seat ring cooling chamber outlet temperature sensor 15, the temperature passes
Sensor is connected with follow-up control unit, and control unit is collected into temperature in the cooling duct that the temperature sensor detects, with
The rotation of cooling blower is controlled, control unit is programmable controller.
Before experiment, cylinder pressure P, the temperature cylinder T in cylinder of diesel engine combustion process, valve are set by control unit
The target control parameters such as seat ring chilling temperature TW, camshaft speed N.According to the actual mated condition installation wear test of valve actuating mechanism
Device, and will entirely test and control loop connection is as shown in Figure 1；During experiment, motor power, motor band moving cam are opened
Rotate, cam acts the driven members such as tappet, push rod, exhaust valve is constantly opened and is taken a seat.In exhauxt valve opens extremely
During taking a seat, gas tube electromagnetism valve opening is adjusted, it is P to make inner pressure of air cylinder；Solenoid current size is adjusted, is made warm in cylinder
Spend for T；Seat ring cooling blower rotating speed is adjusted, cooling chamber outlet air temperature is remained TW；In addition, during test, protect all the time
It is N to hold camshaft speed.Tested by the multiplicating of setting time, dismantle lower valve and valve retainer, observe its outward appearance mill
Disfigurement state, and its internal crystalline phase change using scanning electron microscopic observation, it follows that valve-valve retainer wear form is used in experiment
And wear reason, and then have and structure improvement to property very is carried out to exhaust valve, exhaust valve seat insert.
In-cylinder pressure, temperature when being taken a seat because of exhaust valve have a major impact to valve wear, and therefore, the application cam can
Dismounting, cylinder body temperature, pressure adjustable section are set, consequently facilitating carrying out research point to the abrasion condition of exhaust valve-valve retainer
Analysis.Temperature, pressure sensor signal are received by control unit, judge whether to reach actual value, and by adjusting inflation mechanism
Middle electromagnetism valve opening, solenoid current carry out each target control parameter of closed-loop control.Temperature, pressure when device valve is taken a seat
When identical with actual valve working environment, valve-valve retainer of simulation process of taking a seat is close with true process of taking a seat, and obtains
Valve-valve retainer wear results and legitimate reading it is closer.
The control logic of control unit：
First, engine overall test or with professional software emulate by way of record parameter：Engine speed N0、
Actual cylinder pressure PC, exhaust duct pressure Pp, actual temperature cylinder TC, exhaust valve seat insert cooling chamber exit water temperature TW0；Final
The final state of a control parameter into this test device：Cylinder goal pressure P=PC- Pp, cylinder target temperature T=TC, camshaft
Rotating speed N=N0/2、TW=TW0。
In this test device, signal that sensor measures：Seat ring cooling chamber outlet temperature signal TW ', temperature cylinder signal
T ', cylinder pressure signal P ', motor speed signal N '.
Controller to temperature cylinder T control schematic diagram, as shown in fig. 6, by judge temperature cylinder signal T ' whether etc.
Acted in temperature cylinder T；
Control of the controller to cylinder pressure P, as shown in fig. 7, by judging whether cylinder pressure signal P ' is equal to cylinder
Temperature and pressure power P is acted, in addition, cylinder pressure P is a dynamic value, especially in cylinder exhaust action process, in cylinder body
Can be to exhaust valve one compared with noticeable effort, now cylinder pressure P can rise；
Control of the controller to camshaft speed N, as shown in figure 8, by judging whether motor speed signal N ' is equal to
Camshaft speed N is acted；
Controller is controlled exhaust valve seat insert cooling chamber outlet temperature TW, as shown in figure 9, by judging that seat ring cooling chamber goes out
Whether mouth temperature signal TW ' is acted equal to seat ring cooling chamber outlet temperature signal TW.
For overcome the deficiencies in the prior art, the utility model additionally provides a kind of exhaust valve-exhaust valve seat insert that improves and set
The method for counting structure, this method can effective auxiliary judgment exhaust valve-valve retainer wear form, be exhaust valve-valve retainer
Improvement give and instruct, test method comprises the following steps that：
1) a kind of described double valve-valve retainer abrasion test device is used to the structure of design；
2) after testing setting time, stop；
3) exhaust valve and exhaust valve seat insert are dismantled, is determined with the wear form to exhaust valve and exhaust valve seat insert, really
After fixed, improve exhaust valve again or exhaust valve seat insert is tested again.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (9)
- A kind of 1. double valve-valve retainer abrasion test device, it is characterised in that including：Located at the cylinder cap of testing stand, double gas gate passageway is provided with cylinder cap, exhaust door is provided with exhaust outlet to discharge gas, often Exhaust valve is set in individual exhaust door, and cylinder cap is provided with exhaust valve seat insert in exhaust valve channel bottom, set at the top of exhaust valve convex Action actuating mechanism is taken turns to drive exhaust valve actuation；The cylinder body of cylinder is simulated, cylinder body is supported by testing stand and communicated at the top of cylinder body with cylinder cap bottom, and cylinder body is provided with air inlet, Air inlet is connected with inflation mechanism；Heating arrangements, heating arrangements are located at inner surface of cylinder block or outer surface, so that gas in cylinder body and cylinder body is heated and is heated to The temperature of setting, to simulate cylinder running, after test of many times, pass through naked eyes or scanning electron microscope observation exhaust valve-exhaust The abrasion of seat ring.
- 2. a kind of double valve-valve retainer abrasion test device according to claim 1, it is characterised in that described to add Heat engine structure is electromagnetic heating coil, and electromagnetic heating coil is located at the lower surface of the cylinder body.
- 3. a kind of double valve-valve retainer abrasion test device according to claim 1, it is characterised in that described convex The cam that action actuating mechanism includes being located inside testing stand is taken turns, cam is connected with rotating mechanism, and cam contacts with tappet, tappet In the open slot on testing stand surface, push rod is set, push rod passes through fixed at the top of rocking arm and the exhaust valve in tappet.
- 4. a kind of double valve-valve retainer abrasion test device according to claim 3, it is characterised in that described to push away In tappet, the other end is fixed on rocking arm side for bar one end, and rocking arm opposite side passes through air valve bridge and described exhaust valve top It is fixed, act while to realize double valve.
- A kind of 5. double valve-valve retainer abrasion test device according to claim 1, it is characterised in that the gas Cylinder interior is provided with exhaust valve seat insert cooling chamber in exhaust valve seat insert sidepiece, and exhaust valve seat insert cooling chamber is connected with cooling duct with logical Enter gas or liquid cools down to exhaust valve seat insert；Exported in cooling duct and seat ring cooling chamber outlet temperature sensor is set.
- 6. a kind of double valve-valve retainer abrasion test device according to claim 1, it is characterised in that also include Control unit, control unit is individually connected with described cam action executing agency, inflation mechanism and heating arrangements, with root According to the pressure of gas in the action control cylinder body of exhaust valve.
- A kind of 7. double valve-valve retainer abrasion test device according to claim 6, it is characterised in that the cylinder Body also sets up pressure sensor and temperature sensor, and pressure sensor, temperature sensor are single respectively with described control unit Solely connection.
- A kind of 8. double valve-valve retainer abrasion test device according to claim 1, it is characterised in that the row Valve spring is set in gas gate passageway, and one end and the valve collet of valve spring are fixed, and the other end offsets with cylinder.
- 9. a kind of double valve-valve retainer abrasion test device according to claim 4, it is characterised in that described to shake Arm has the distance of setting with the cylinder lid surface.
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| CN201720367692.2U CN206671105U (en) | 2017-04-10 | 2017-04-10 | A kind of double valve valve retainer abrasion test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918523A (en) * | 2017-04-10 | 2017-07-04 | 山东大学 | A kind of double valve valve retainer abrasion test device and method |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918523A (en) * | 2017-04-10 | 2017-07-04 | 山东大学 | A kind of double valve valve retainer abrasion test device and method |
| CN106918523B (en) * | 2017-04-10 | 2024-02-02 | 山东大学 | Double-row valve-valve seat ring wear test device and method |
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