CN202522406U - Dynamic rigidity measuring device for valve spring of distribution mechanism - Google Patents
Dynamic rigidity measuring device for valve spring of distribution mechanism Download PDFInfo
- Publication number
- CN202522406U CN202522406U CN2012201521125U CN201220152112U CN202522406U CN 202522406 U CN202522406 U CN 202522406U CN 2012201521125 U CN2012201521125 U CN 2012201521125U CN 201220152112 U CN201220152112 U CN 201220152112U CN 202522406 U CN202522406 U CN 202522406U
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- China
- Prior art keywords
- valve
- laser displacement
- displacement sensor
- scrambler
- dynamic
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Abstract
The utility model discloses a dynamic rigidity measuring device for a valve spring of a distribution mechanism. In the utility model, a control cabinet is in signal connection with a motor; the motor drives a tooth-shaped belt wheel on a cam shaft of the distribution mechanism to rotate; an encoder is mounted on the cam shaft; an acceleration sensor is stuck on the top surface of a valve; an output end of the acceleration sensor is connected with a charge amplifier; a laser displacement sensor is located above the valve end of a rocker arm and directly faces to the valve end of the rocker arm; a strain gauge is attached to the valve end of the rocker arm; an output end of the strain gauge is connected with a dynamic strain indicator; the signals output by the encoder, the charge amplifier, the laser displacement sensor and the dynamic strain indicator are input into an upper computer through a data acquisition card; and an output end of the encoder is connected with a tachometer. The device disclosed by the utility model has the advantages of simple structure, accurate experiment result and low cost, and is convenient to use for long time.
Description
Technical field
The utility model belongs to the vehicle detection technical field, relates to a kind of valve actuating mechanism valve spring dynamic rate measurement mechanism.
Background technology
Valve spring is one of important spare part of valve actuating mechanism, and the dynamic rate of spring directly affects the performance of valve actuating mechanism.Dynamic rate is too small, can cause valve can't in time take a seat and tightly fit, and makes the valve bounce or jump destroy its sealing; Dynamic rate is excessive, in the time of then can increasing valve-closing to the impact of valve retainer with to the friction of cam, thereby influence the durability degree of parts.Its damage gently then influences engine capacity, moment of torsion, oil consumption and abnormal sound are heavy then cause faults such as valve fracture.Therefore need measure the dynamic rate of valve actuating mechanism valve spring.
At present, the main method of spring Research on Dynamic Characteristic is had separately spring placed make an experiment on the actuating vibration table or spring is carried out finite element analysis.But these research methods have been ignored the influence of circumferential component to spring, thereby possibly cause the gained result not conform to reality.
Summary of the invention
The utility model purpose is to overcome the deficiency of above-mentioned technology, and a kind of complete function, cost is low, efficient is high valve actuating mechanism valve spring dynamic rate measuring system are provided.
The utility model adopts following technical scheme:
Valve actuating mechanism valve spring dynamic rate measurement mechanism comprises: switch board, motor, scrambler, acceleration transducer, laser displacement sensor, foil gauge, tachometer gage, charge amplifier, dynamic strain indicator, data collecting card and host computer.
Switch board is connected with the motor signal, and the profile of tooth belt wheel on the driven by motor valve actuating mechanism camshaft rotates, and scrambler is installed on the camshaft; Acceleration transducer is bonded on the valve end face; The output terminal of acceleration transducer is connected with charge amplifier, and laser displacement sensor is positioned at rocking arm valve end top, and is provided with over against rocking arm valve end; Foil gauge is attached on the rocking arm valve end; The foil gauge output terminal is connected with dynamic strain indicator, and the signal of scrambler, charge amplifier, laser displacement sensor and dynamic strain indicator output is through data collecting card input host computer, and the output terminal of scrambler is connected with tachometer gage simultaneously.
Compared with prior art, the beneficial effect of the utility model is:
1, the valve spring dynamic rate measurement mechanism that provides of the utility model; But the nominal situation of simulated engine is measured the dynamic rate of valve spring; But not separately valve spring is experimentized, avoided because of getting rid of the error that peripheral parts cause the influence of spring dynamic rate.
2, the valve actuating mechanism valve spring dynamic rate measurement mechanism that provides of the utility model; Through measurement data such as scrambler, acceleration transducer, laser displacement sensor, foil gauges; And, realize real-time Monitoring Data through host computer demonstration preservation data, improved conventional efficient.
3, the valve actuating mechanism valve spring dynamic rate measurement mechanism that provides of the utility model, simple in structure, experimental cost is low, conveniently uses for a long time, adaptable across each auto parts and components manufacturing plant, helps industry development.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a sensor installation site synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, valve actuating mechanism valve spring dynamic rate measuring system comprises: switch board 1, motor 2, grease-box 4, scrambler 5, acceleration transducer 6, laser displacement sensor 7, foil gauge 8, tachometer gage 9, charge amplifier 10, dynamic strain indicator 11, data collecting card 12, host computer 13.
The utility model valve actuating mechanism valve spring dynamic rate measurement mechanism test method: control motor 2 through switch board 1 and tachometer gage 9; Make it drive camshaft on valve actuating mechanism 3 with certain rotational speed, through scrambler 5, acceleration transducer 6; Laser displacement sensor 7 obtains valve acceleration respectively; Spring deflection obtains rocking arm load in conjunction with static demarcating and foil gauge 8 data of surveying, and calculates the dynamic rate of valve spring.Its experimental procedure is:
According to the formula:
calculate the dynamic stiffness of the valve spring
.In the formula
Expression valve spring dynamic rate,
Expression rocking arm load,
The expression valve acceleration,
Expression
GasDoor group quality,
The expression spring deflection.
In Fig. 2, provided acceleration 5 sensors on the valve actuating mechanism, laser displacement sensor 7, the installation site of foil gauge 8 specifically comprises valve actuating mechanism cam 3-1, rocking arm 3-2, valve 3-3, valve spring 3-4.Acceleration transducer is bonded on the valve end face, and laser displacement sensor is positioned at rocking arm valve end top, and is provided with over against rocking arm valve end, and foil gauge is attached on the rocking arm valve end.
Claims (1)
1. valve actuating mechanism valve spring dynamic rate measurement mechanism comprises switch board, motor, and scrambler, acceleration transducer, laser displacement sensor, foil gauge, tachometer gage, charge amplifier, dynamic strain indicator, data collecting card and host computer is characterized in that:
Switch board is connected with the motor signal, and the profile of tooth belt wheel on the driven by motor valve actuating mechanism camshaft rotates, and scrambler is installed on the camshaft; Acceleration transducer is bonded on the valve end face; The output terminal of acceleration transducer is connected with charge amplifier, and laser displacement sensor is positioned at rocking arm valve end top, and is provided with over against rocking arm valve end; Foil gauge is attached on the rocking arm valve end; The foil gauge output terminal is connected with dynamic strain indicator, and the signal of scrambler, charge amplifier, laser displacement sensor and dynamic strain indicator output is through data collecting card input host computer, and the output terminal of scrambler is connected with tachometer gage simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201521125U CN202522406U (en) | 2012-04-12 | 2012-04-12 | Dynamic rigidity measuring device for valve spring of distribution mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201521125U CN202522406U (en) | 2012-04-12 | 2012-04-12 | Dynamic rigidity measuring device for valve spring of distribution mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522406U true CN202522406U (en) | 2012-11-07 |
Family
ID=47105349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201521125U Expired - Lifetime CN202522406U (en) | 2012-04-12 | 2012-04-12 | Dynamic rigidity measuring device for valve spring of distribution mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202522406U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620924A (en) * | 2012-04-12 | 2012-08-01 | 杭州电子科技大学 | Device and method for measuring dynamic rigidity of valve spring of valve mechanism |
| CN110375905A (en) * | 2018-04-11 | 2019-10-25 | 上海汽车集团股份有限公司 | A kind of engine valve spring force measuring device, method and device |
-
2012
- 2012-04-12 CN CN2012201521125U patent/CN202522406U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620924A (en) * | 2012-04-12 | 2012-08-01 | 杭州电子科技大学 | Device and method for measuring dynamic rigidity of valve spring of valve mechanism |
| CN102620924B (en) * | 2012-04-12 | 2014-07-09 | 杭州电子科技大学 | Device and method for measuring dynamic rigidity of valve spring of valve mechanism |
| CN110375905A (en) * | 2018-04-11 | 2019-10-25 | 上海汽车集团股份有限公司 | A kind of engine valve spring force measuring device, method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140709 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140709 |
|
| RGAV | Abandon patent right to avoid regrant |