CN201302515Y - Pressing mechanism of air valve which can control down moving of angle of various air valves accurately - Google Patents
Pressing mechanism of air valve which can control down moving of angle of various air valves accurately Download PDFInfo
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- CN201302515Y CN201302515Y CNU2008201435142U CN200820143514U CN201302515Y CN 201302515 Y CN201302515 Y CN 201302515Y CN U2008201435142 U CNU2008201435142 U CN U2008201435142U CN 200820143514 U CN200820143514 U CN 200820143514U CN 201302515 Y CN201302515 Y CN 201302515Y
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Abstract
The utility model discloses a pressing mechanism of an air valve of a cylinder head on a testing stand for detecting the flow property of an air way of an internal combustion engine. The pressing mechanism comprises two parts which are framework components and detecting components. The structure of the framework part is as follows: a standing plate is fixed on the plane surface of the testing stand through a locking wheel; a vertical arm is connected with the shaft of the standing plate; both the two ends of a cross arm are connected with the vertical arm and the locking wheel of a support bar; and a support arm is fixed on a magnetic base which is fixed on the surface of the testing stand. The structure of the detecting part is as follows: a spherical pressure head is fixed with the lower end of a socket connector which is inserted in the inner chamber of a detection piece; the upper end of the socket connector is fixed with a spring seat through screw threads; a spring is pressed in the inner chamber of the detection piece; the top end of a spindle extension of a linear motor is fixedly connected with a shaft sleeve through screw threads, and then, is locked through a lock nut; and the detecting components are assembled in the middle position of the cross arm. The utility model has the characteristics that the test of air ways of cylinder heads with various air valve inclination angles can be met by adjusting the angle of the vertical arm; the pressure head is ensured to be pressed in the air valve vertically; the judgment of the zero point of the lift range of the air valve of the engine and the accurate control of the lift thereof can be realized; and the detection precision is improved.
Description
Technical field
The utility model belongs to engine performance parameter detecting technology, is specifically related to the cylinder head valve hold-down mechanism on a kind of air passage of internal combustion engine flowing property detection testing table.
Technical background
The internal combustion engine gas path flow performance permanent flow test platform can measure the engine cylinder cap air intake duct coefficient of flow, swirl ratio, roll stream and flow parameter such as compare.For making engine obtain good dynamic property, economy and emission performance, require the cylinder head of engine sufficiently high coefficient of flow and suitable swirl ratio must be arranged, roll parameters such as stream compares, so this testing table always is exactly the important tool that engine quality detects.But air flue test stand relates to multidisciplinary technology such as machinery, electronics, air motion and combustion in IC engine to the engine air flue performance detection, so the formation of the contained parts of testing table criteria of right and wrong device all mostly.During the test of air passage of internal combustion engine current stabilization, require the valve of simulated engine cylinder head to open continuously or intermittently, at each reference mark, the pressure reduction at the valve opening amount of tight test this moment, gas flow, air flue two ends, gas moment of torsion etc. and relevant parameters such as upper airway flow coefficient of discharge, swirl ratio.
Because engine valve (particularly gasoline engine) all has certain angle, it is fixing to overlap complicated valve spring and spring locker etc. by one, and its locus is limited and initial tension of spring is bigger.How can open valve fast when air flue test and to know the position that valve is opened simultaneously, be the difficult point that air flue test runs into always.The angle that its valve of different engines is installed is different.Therefore different air valve angle requirement, the position the when valve of measuring engine cylinder cap is opened continuously or intermittently or accurately know valve stroke is an insoluble problem in the air flue test.At present following 2 kinds of methods that address this problem are arranged both at home and abroad: (1) adopts a kind of pressing plate method at different air valve angle.In the position that pressing plate is connected with cylinder head, corresponding air valve angle has the hole of respective angles, when rotation manual is calmed the anger door, measures the displacement of its rotation with dial gauge, determines the lift that valve is opened with this.The major defect of this mode is, every type of cylinder cap all needs the specialized designs pressing plate, the sense of valve stroke initial position armrest, and judge extremely inaccurate zero point.(2) adopt multiple-degree-of-freedom mechanism.Adopt turbine worm mechanism, depress valve with step motor drive, valve lift amount is measured by displacement transducer.The defective of this mode is, do not have the installation site at the valve place of cylinder head, except that displacement transducer be difficult to fixing, the gauge head of sensor also is difficult to contact with valve.Similar with first method, its valve stroke initial position armrest sense, judge extremely inaccurate zero point.And adopt stepper motor and turbine worm mechanism etc. to cause complex structure, too much transmission to make comparatively difficulty of displacement control.Proposition of the present utility model can make the problems referred to above be solved.
Summary of the invention
The purpose of this utility model is to detect on the testing table in the air passage of internal combustion engine flowing property, a kind of mechanical hook-up that can accurately control valve stroke at different air valve angle is provided, position when the valve that promptly can accurately measure engine cylinder cap is opened continuously or intermittently can be judged engine air valve lift zero point simultaneously automatically.
Below in conjunction with Fig. 1～Fig. 4 know-why of the present utility model is described.The valve hold-down mechanism mainly is made up of frame assembly and detection components two large divisions.Frame assembly comprises: riser, locking wheel, upright arm, transverse arm, register pin, support bar, sway brace and magnet base (as Fig. 1); Detection components comprises: (as Fig. 2) such as spherical indenter, connector, detection piece, spring base, spring, gland nut, axle sleeve, motor locknut, linear electric motors.On the test table top, constitute a portal frame by upright arm, transverse arm and support bar.Riser is fixed in the testing table plane with locking wheel; Sway brace is fixed in the side of magnet base.Because the lower end of upright arm and two parts of support bar is connected with riser, support arm axle respectively, so portal frame just can rotate in the scope of 0～90 degree around riser and sway brace.Adopt magnet base and table top to its objective is that fixedly the position of portal frame one end can be on the air flue experiment table freely fixes among a small circle, can make things convenient for dissimilar experiments like this.The structure of detection components is: be connected with connector and detection piece etc. as the spherical indenter that detects valve stroke, the upper surface of connector connects negative electrode, the lower surface of detection piece connects positive electrode, the stroke signal that spherical indenter is pressed into valve is to obtain by the contact of two electrodes, can vertically be pressed into the valve with different deviation angles so will guarantee spherical indenter.Be designed in view of the above: the door word framework that upright arm, transverse arm, support bar are formed is done the axle rotation around riser and sway brace; Transverse arm can rotate with respect to upright arm and support bar simultaneously.Promptly by the adjustment of portal frame and two positions of transverse arm, the valve that reaches spherical indenter and different deviation angles can be vertical.In order to make the portal frame fixed angle, except have locking wheel fixing, on riser, be provided with 10 apertures, corresponding respectively 0～90 degree of each aperture, corresponding therewith, the outside of upright arm is provided with deep-slotted chip breaker, just deep-slotted chip breaker and the aperture on the riser (as Fig. 3) that founds arm can be coupled together with register pin, when even locking wheel becomes flexible, upright arm can only slide around riser shaft among a small circle, and can landing not test on the table top at air flue.Because the rigidity of engine valve spring is bigger, transverse arm is longer, and the calm the anger reacting force of door of spherical indenter can cause the transverse arm elastic deformation, causes the valve stroke error.At this moment can be used for reducing its distortion by the tension of support bar, promptly reduce the valve stroke error.
The effect of detection components medi-spring is to make the lower surface of connector upper surface and detection piece keep state separately.For prolongation axle and the axle sleeve that prevents linear electric motors takes place to become flexible, with of prolongation axle and the axle sleeve locking of motor locknut with linear electric motors.The lower surface of the upper surface of connector and detection piece constitutes positive and negative electrode as described above, forms circuit pathways when both contact.Carry out the valve stroke automatic judgement at zero point with the rigidity of spring thus.Engine for dissimilar or model, the rigidity of its engine valve spring is different, the foundation of judging valve stroke zero point is to measure the size that spherical indenter is applied to power on the valve, this power is regulated according to spring, thereby the rigidity that changes spring just can satisfy the valve stroke requirement of judgement automatically at zero point of different engines, when compressing valve under the prolongation axially of detection components by linear electric motors, because the effect of engine valve spring rigidity, it is motionless that spherical indenter keeps, therefore the upper surface of connector also keeps motionless, what move down is the lower surface of detection piece, when the detection components medi-spring compresses when complete, the upper surface that is connector begins to contact with the lower surface of detection piece, and the circuit pathways of formation sends to signal of computer, and the valve stroke of at this moment judging engine is zero point.Cut off the power supply to linear electric motors by computer control power supply, for accurately controlling valve stroke, the program that can set in advance in computer is accurately controlled valve stroke.
Description of drawings
Fig. 1 is the utility model frame assembly structure principle chart.
Fig. 2 is the stereoeffect sketch of Fig. 1.
Fig. 3 is the utility model detection components structure principle chart.
Fig. 4 is the upright arm turned position synoptic diagram on riser of the utility model.
Embodiment
By the following examples and in conjunction with the accompanying drawings structural principle of the present utility model is further described.
The utility model mainly is made up of frame assembly and detection components two large divisions, and frame assembly comprises: riser 1, locking wheel 2, upright arm 3, register pin 4, transverse arm 5, support bar 6, sway brace 7 and magnet base 8.Form portal frame by 3 transverse arms 5 of the upright arm in the frame assembly, support bar 6.Concrete structure is: riser 1 usefulness locking wheel 2 is fixed in the testing table plane, and upright arm 3 is connected with 1 of riser.Transverse arm 5 one ends are fixed on the upright arm 3 with locking wheel 2, and the transverse arm other end is fixed with bolt and support bar 6 one ends, and the other end of support bar and sway brace 7 are used bolt, and sway brace 7 is fixed in the side of magnet base 8, and magnet base 8 is fixed in the test table top.Detection components is made up of spherical indenter 9, connector 10, detection piece 11, spring base 12, spring 13, gland nut 14, axle sleeve 15, motor locknut 16, linear electric motors 17.Concrete structure is: spherical indenter 9 is fixed with the lower end of connector 10.Connector inserts the inner chamber of detection piece 11, and connector 10 upper ends are threaded with the internal thread hole of spring base 12 fastening, and spring 13 places on the spring base 12.Detection piece 11 upper ends have internal thread, and gland nut 14 is pressed into the detection piece inner chamber by the internal thread of detection piece upper end with spring 13.Axle sleeve 15 also is fixed in detection piece inner chamber upper end by external thread.The prolongation axle top of linear electric motors 17 is processed with external thread fixedlys connected with the internal thread hole of axle sleeve 15, and motor locknut 16 prolongs axle with linear electric motors 17 and is locked with axle sleeve 15, and detection components is assembled in the centre position of transverse arm 5.The door word framework that upright arm 3, transverse arm 5, support bar 6 are formed can be done the axle rotation around riser 1 and sway brace 7; Transverse arm 5 can rotate with respect to upright arm 3 and support bar 6 simultaneously, makes the spherical indenter 9 in the detection components can vertically be pressed into the valve with different deviation angles.Riser 1 is provided with 10 apertures, corresponding respectively 0～90 degree in each hole.When becoming flexible with the locking wheel 2 that prevents portal frame generation skew or 1 of fixed board and upright arm 3, upright arm 3 landings are tested on the table top at air flue, and the outside of upright arm 3 is provided with deep-slotted chip breaker, will found arm 3 with register pin 4 and carry out fixed angle with riser 1.The upper surface of connector 10 connects negative electrode, and the lower surface of detection piece 11 connects positive electrode.
Embodiment: engine cylinder head system places on the air flue test stand, rotating upright arm 3 of adjustment and transverse arm 5 makes spherical indenter 9 can vertically be pressed into valve, it is fixing to found arm and riser shaft etc. with bolt and locking wheel then, uses register pin 4 that the deep-slotted chip breaker on aperture on the riser 1 (Fig. 3) and the upright arm is coupled together simultaneously.Control linear electric motors with computer, when compressing valve under the prolongation axially of detection components by linear electric motors, because valve spring has certain rigidity in the engine cylinder head system, cause spherical indenter 9 to keep motionless, therefore the upper surface of connector also keeps motionless, and detection piece moves down, when in the detection components spring 13 when compressing fully, the upper surface that is connector 10 begins to contact with the lower surface of detection piece 11, the conducting of the circuit that forms, send to signal of computer this moment, and the valve stroke of at this moment judging engine is zero point, by computer control power supply linear electric motors cut off the power supply.Judge and in order accurately to control valve stroke, accurately control valve stroke after the valve stroke place at zero point by the linear electric motors of computer control.
The beneficial effects of the utility model and advantage are: the utility model uses one group of mechanical system, by regulating armstand Angle can satisfy respectively the demand of the cylinder-head port test at various different air valves inclination angle, guarantee that spherical indenter can vertically press Enter valve, simultaneously because the existence of linear electric motors and detection components, can realize automatically that engine air valve lift is judged zero point and Accurately the control valve stroke has reduced experimental error, and can improve detection efficiency. The utility model can be wide as product Be applied to the application scenarios such as compression, location in the production and processing generally.
Claims (4)
1. but the valve hold-down mechanism that moves down of precisely controlling different air valve angle, has riser, locking wheel, upright arm, transverse arm, register pin, support bar, sway brace, magnet base, connector, detection piece, spring, spring base, axle sleeve, linear electric motors, it is characterized in that the valve hold-down mechanism mainly is made up of frame assembly and detection components two large divisions, frame assembly comprises: riser (1), locking wheel (2), upright arm (3), register pin (4), transverse arm (5), support bar (6), sway brace (7) and magnet base (8), by the upright arm (3) in the frame assembly, transverse arm (5), support bar (6) is formed portal frame, wherein: riser (1) is fixed in the testing table plane with locking wheel (2), upright arm (3) is connected with riser (1) axle, transverse arm (5) one ends are fixed on the upright arm (3) with locking wheel (2), the transverse arm other end is fixed with bolt and support bar (6) one ends, the other end of support bar and sway brace (7) are used bolt, sway brace (7) is fixed in the side of magnet base (8), and magnet base (8) is fixed in the test table top; Detection components is by spherical indenter (9), connector (10), detection piece (11), spring base (12), spring (13), gland nut (14), axle sleeve (15), motor locknut (16), linear electric motors (17) are formed, wherein: spherical indenter (9) is fixed with the lower end of connector (10), connector inserts the inner chamber of detection piece (11), connector (10) upper end is threaded with the internal thread hole of spring base (12) fastening, spring (13) places on the spring base (12), detection piece (11) upper end has internal thread, gland nut (14) is pressed into the detection piece inner chamber by the internal thread of detection piece upper end with spring (13), axle sleeve (15) also is fixed in detection piece inner chamber upper end by external thread, the prolongation axle top of linear electric motors (17) is processed with external thread and fixedlys connected with the internal thread hole of axle sleeve (15), motor locknut (16) prolongs axle with linear electric motors (17) and is locked with axle sleeve (15), and detection components is assembled in the centre position of transverse arm (5).
2. but the valve hold-down mechanism that moves down according to the described precisely controlling different air valve angle of claim 1, it is characterized in that the door word framework of being made up of described upright arm (3), transverse arm (5), support bar (6) can do an axle rotation around riser (1) and described sway brace (7), described transverse arm (5) can rotate with respect to upright arm (3) and support bar (6), makes the spherical indenter (9) in the described detection components can vertically be pressed into the valve with different deviation angles.
3. but the valve hold-down mechanism that moves down according to the described precisely controlling different air valve angle of claim 1, it is characterized in that described riser (1) is provided with 10 apertures, corresponding respectively 0～90 degree in each hole, the outside of described upright arm (3) is provided with deep-slotted chip breaker, with described register pin (4) described upright arm (3) and described riser (1) is carried out fixed angle.
4. but the valve hold-down mechanism that moves down according to the described precisely controlling different air valve angle of claim 1 is characterized in that the upper surface of described connector (10) connects negative electrode, and the lower surface of detection piece (11) connects positive electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201435142U CN201302515Y (en) | 2008-11-26 | 2008-11-26 | Pressing mechanism of air valve which can control down moving of angle of various air valves accurately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201435142U CN201302515Y (en) | 2008-11-26 | 2008-11-26 | Pressing mechanism of air valve which can control down moving of angle of various air valves accurately |
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| Publication Number | Publication Date |
|---|---|
| CN201302515Y true CN201302515Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201435142U Expired - Fee Related CN201302515Y (en) | 2008-11-26 | 2008-11-26 | Pressing mechanism of air valve which can control down moving of angle of various air valves accurately |
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| Country | Link |
|---|---|
| CN (1) | CN201302515Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963484A (en) * | 2010-09-14 | 2011-02-02 | 南京金城机械有限公司 | Universal detection device of engine valve lift |
| CN107462421A (en) * | 2017-10-12 | 2017-12-12 | 河北工业大学 | Engine can revolve valve experimental provision |
-
2008
- 2008-11-26 CN CNU2008201435142U patent/CN201302515Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963484A (en) * | 2010-09-14 | 2011-02-02 | 南京金城机械有限公司 | Universal detection device of engine valve lift |
| CN101963484B (en) * | 2010-09-14 | 2012-01-18 | 南京金城机械有限公司 | Universal detection device of engine valve lift |
| CN107462421A (en) * | 2017-10-12 | 2017-12-12 | 河北工业大学 | Engine can revolve valve experimental provision |
| CN107462421B (en) * | 2017-10-12 | 2023-04-11 | 河北工业大学 | Rotatable valve experimental device of engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20111126 |