CN106872057A - The derivation mechanism of measurement signal in a kind of engine cylinder - Google Patents
The derivation mechanism of measurement signal in a kind of engine cylinder Download PDFInfo
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- CN106872057A CN106872057A CN201710009985.8A CN201710009985A CN106872057A CN 106872057 A CN106872057 A CN 106872057A CN 201710009985 A CN201710009985 A CN 201710009985A CN 106872057 A CN106872057 A CN 106872057A
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- hollow pipe
- piston
- flexible hollow
- flexible
- derivation mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses a kind of derivation mechanism of measurement signal in engine cylinder, including flexible hollow pipe；One end of flexible hollow pipe is fixed in the cooling oil outlet in piston；Flexible side wall of hollow pipe is provided with the excessively oily passage that cooling oil duct can be connected with the middle cavity of flexible hollow pipe.The other end of flexible hollow pipe is slidingly sealed with piston cooling nozzle by alignment pin and is connected.Signal transmssion line is wrapped in the periphery of flexible hollow pipe or overlays in the middle cavity of flexible hollow pipe, and flexible hollow pipe can be stretched with the reciprocating motion of piston, and signal transmssion line can be launched and folded with the flexible of flexible hollow pipe.After using said structure, measurement signal data in temperature or other cylinders can be obtained, and continuously, reliably transmit to external engine on the premise of engine original structure and performance is not influenceed.The bending stress of signal transmssion line is smaller, can bear the test of the complex working conditions such as multi cycle, long-time, big load, rotating speed high, good reliability.
Description
Technical field
The present invention relates to a kind of engine testing device, the derivation mechanism of measurement signal in particularly a kind of engine cylinder.
Background technology
In engine working process, the parameter such as in-cylinder combustion directly affects the finger such as engine performance, economy, reliability
Mark, so some parameters in necessary measurement cylinder, to instruct the work such as engine design and performance development, but due to work
Plug is constantly in the state of quick motion, so think that the parameters such as measurement in-cylinder combustion have very big difficulty, even if arranging phase
Sensor is closed, signal transmssion line is also more difficult to be drawn out to the external world.Other signal transmssion line when high speed piston is moved, also easily and its
His component interference itself fractures because of fatigue.
To overcome above-mentioned technical problem, the technical scheme of following three kinds of solutions is there are in the prior art：
Scheme 1：By the thermocouple temperature measurement module being integrated on piston, a whole set of dress such as analog switch module and memory module
Put, moved with piston, temperature survey and storing process are controlled by analog switching circuit, storage is read after end to be tested
Data in device.
The specific embodiment of scheme 1, such as Chinese patent application of Publication No. CN102156005A, its innovation and creation
Entitled " universal piston temperature measuring device for combustion engine ", in the patent, first, second thermal insulation box respectively by first, the
Two fixed seats are fixed on two key seats of piston；Analog switching circuit module is encapsulated in the first thermal insulation box, analog switch
Circuit module includes CPU, sensor interface, cold junction compensation circuit and starts trigger switch, one end of sensor interface
It is connected with respectively at thermocouple and cold junction compensation circuit, the other end of sensor interface is connected with CPU, starts triggering and open
Pass is also connected on CPU；Memory module is encapsulated in the second thermal insulation box and by wire and analog switching circuit module phase
Even, reservoir module carries electronic clock, and taken at regular intervals simultaneously stores the data of thermocouple.
After using above-mentioned patent application, once experiment can measure the piston temperature under series of stable operating mode, there is provided
The efficiency of piston temperature measurement, shortens the time of measuring of steady temperature measurement, makes the stable state piston temperature under different operating modes
Measurement process is greatly simplified.
Scheme 2：The thermometric screw with film thermocouple is installed by being drilled on piston, and compensated wire and data
Collection amplified transmitter connection, then transmits a signal to signal receiving device, and then obtain by way of being wirelessly transferred
Temperature data at piston.
The specific embodiment of scheme 2, such as Chinese patent application of Publication No. CN102853930A, it includes that data are adopted
Collection amplified transmitter, signal receiving device, computer, thermometric screw and compensating wire, the thermometric screw are led by compensation
Line is connected with data acquisition amplified transmitter, and the data acquisition amplified transmitter is connect by wireless transmission signal with signal
Receiving apparatus are connected, and the signal receiving device is connected by data wire with computer；There is film heat the thermometric screw upper surface
Galvanic couple.
Above-mentioned patent application, using advanced film thermocouple technology of preparing thermometric, it is ensured that dynamic response time is short, temperature
Degree certainty of measurement is high, can continuously be measured, and is easy to make in addition using the sensor of Screw structure, and be easy to lay
On piston, simple structure, change it is convenient, can be with standardized production.
Scheme 3：Other set slave connecting rod mechanism is designed on connecting rod, by signal transmssion line along master connecting-rod to slave connecting rod,
Then it is drawn out on the auxiliary piston of design, the temperature signal of stabilization can be measured.
However, above-mentioned three kinds of solutions technical scheme of the prior art, however it remains following deficiency：
1. in scheme 1, due to high engine speeds operating, so the data volume in once testing is quite huge, memory is deposited
Storage space requirement is larger, in addition, reliability of the high temperature at piston also to signal transmission module in temp measuring system has potential threat；
Installing space also there are certain requirements.
2. in scheme 2, using wireless transmission signal, vibration and other signals in high engine speeds operation process may be subject to
Interference, cause data deviation occur.The compensation circuit of correlation or arranging for shielding interference signal are not provided in the prior art
Apply.
3. such scheme 3, complex structure, will design a slave connecting rod system, and destroy connecting rod and body, in addition,
Still there is certain swing between small end of connecting rod and piston and between connecting rod and slave connecting rod, still can there is lead bending disconnected
The risk split.
The content of the invention
The technical problem to be solved in the present invention is directed to above-mentioned the deficiencies in the prior art, and provides in a kind of engine cylinder and survey
The derivation mechanism of signal is measured, the ingenious machine oil shake using piston in primary motivation of the derivation mechanism of measurement signal in the engine cylinder
Cooling body is swung, measurement signal in temperature or other cylinders can be obtained on the premise of engine original structure and performance is not influenceed
Data, and continuously, reliably transmit to external engine.In addition, the bending stress of signal transmssion line is smaller, follow can be born more
The test of the complex working conditions such as ring, long-time, big load, rotating speed high, good reliability.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of derivation mechanism of measurement signal in engine cylinder, the derivation mechanism is arranged on the piston in engine cylinder, is used for
Signal transmssion line in piston is led into external engine.
Be provided with sensor, horizontal cooling oil duct and vertical cooling oil outlet in piston, cooling oil duct with cool down out
Oilhole is connected；The sensor that signal transmssion line will be arranged in piston is connected with the monitoring device of external engine.
Derivation mechanism is a hollow flexible hollow pipe；Stretch into the cooling oil outlet in piston in one end of flexible hollow pipe
It is interior, and be fixedly connected with the piston；Stretch into and oily passage was provided with the flexible side wall of hollow pipe in cooling oil outlet, the oil excessively is logical
With the middle cavity of flexible hollow pipe can be connected cooling oil duct by road.
The other end of flexible hollow pipe is slidingly sealed with piston cooling nozzle by alignment pin and is connected.
Signal transmssion line is wrapped in the periphery of flexible hollow pipe or overlays in the middle cavity of flexible hollow pipe, stretches hollow
Pipe can be stretched with the reciprocating motion of piston, and signal transmssion line can be launched and rolled over the flexible of flexible hollow pipe
It is folded.
The sensor includes temperature sensor.
The flexible hollow pipe is formed by some mutual intussusceptions of oil pipe, is between adjacent two oil pipes and is slidably connected.
Every oil pipe is conical pipe.
The collapsing length of flexible hollow pipe is more than more than engine strokes.
Flexible hollow pipe periphery is set with spring, and one end of the spring is fixedly connected with the piston, the other end of spring and work
Plug cooling nozzles are fixedly connected, and spring is launched and folded with the flexible of flexible hollow pipe, and signal transmssion line is along spring
The hand of spiral be adhesively fixed on the spiral winding of spring.
The excessively oily passage and the height flush of cooling oil duct set in flexible side wall of hollow pipe.
The present invention has the advantages that using after said structure：
1. applicability is wide, can be used for different engines.
2. measured by mechanical contact, the possibility being interfered is small, realized by temperature sensor or other sensings
Signal in device direct measurement cylinder, and continuously, reliably transmit to the effect of external engine, signal can real-time accurate delivery.
3. the bending stress of signal transmssion line is smaller, can bear the complexity such as multi cycle, long-time, big load, rotating speed high
The test of operating mode, good reliability can help obtain the in-cylinder combustion data that engine is worked under various operating modes.
4. derivation mechanism has fixed and guide effect to signal transmssion line, it is to avoid the random swing of signal transmssion line cause with
The interference of other movement parts, improves the reliability of measuring system.
5. the ingenious machine oil concussion cooling body using piston in primary motivation, changes small, simple structure, experimentation cost
It is low, easily implement, the data of needs are obtained on the premise of the original structure and performance of engine is not influenceed as far as possible.
6. because hollow pipe inside of being stretched in derivation mechanism is simultaneously as the passage of cooling and lubricating piston oil, such mechanism
There is following some benefit：Firstly it may be ensured that not influenceing the normal cooling of piston；Secondly lubricating oil can play profit to the mechanism
Sliding effect, it is ensured that its reliably working；Other lubricating oil has certain cushioning effect to signal transmssion line therein, further improves
Its reliability.
Brief description of the drawings
Structural representation when Fig. 1 shows that derivation mechanism is positioned at elongation state in engine cylinder.
Structural representation when Fig. 2 shows that derivation mechanism is positioned at contraction state in engine cylinder.
Fig. 3 shows the structural representation of the derivation mechanism of measurement signal in a kind of engine cylinder of the invention.
Fig. 4 shows the mplifying structure schematic diagram in the area of circle I in Fig. 3.
Fig. 5 shows the mplifying structure schematic diagram in the area of circle II in Fig. 3.
Fig. 6 shows the arrangement schematic diagram of signal transmssion line in embodiment 2.
Fig. 7 shows the attachment structure schematic diagram of flexible hollow pipe and piston in Fig. 6.
Wherein have：1. sensor；1-a. temperature sensors；1-b. pressure sensors；1-c. 3rd sensors；
2. piston；3. stretch hollow pipe；4. signal transmssion line；5. piston cooling nozzle；6. oily passage is crossed；7. alignment pin；8. spiral shell
Spin line circle；9.；10. spring base.
Specific embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, in a kind of engine cylinder measurement signal derivation mechanism, the derivation mechanism be arranged on start
On piston 2 in machine cylinder, for the signal transmssion line 4 in piston to be led into external engine.
Be provided with sensor 1, horizontal cooling oil duct and vertical cooling oil outlet in piston, cooling oil duct with cool down out
Oilhole is connected, and the sensor that signal transmssion line will be arranged in piston is connected with the monitoring device of external engine.
The sensor 1, is arranged on piston by the mounting hole processed on piston, can in real time measure the temperature at piston
Degree or other signals, and external engine is transmitted a signal to by signal transmssion line, it is easy to analysis with record.
The quantity of the sensor 1, species and position, are selected according to actual needs, can be 1,2 or many
It is individual.In the application, the quantity of sensor is preferably 3, and respectively temperature sensor 1-a, pressure sensor 1-b and the 3rd sense
Device 1-c, arrangement is as depicted in figs. 1 and 2.Certainly, as replacement, 3 sensors also can simultaneously for temperature sensor or
Other types sensor, specific evidence is actually needed comes specifically chosen sensor type, installation site and number.
As shown in Figure 1 to Figure 3, derivation mechanism is a hollow flexible hollow pipe 3；Stretch into work in one end of flexible hollow pipe
In cooling oil outlet in plug, and it is fixedly connected with the piston；Stretch into and be provided with the flexible side wall of hollow pipe in cooling oil outlet
Oily passage 6 is crossed, with the middle cavity of flexible hollow pipe can be connected cooling oil duct by the excessively oily passage.It is preferred that, hollow tube side of stretching
The excessively oily passage and the height flush of cooling oil duct set on wall.
As shown in figure 4, the other end of flexible hollow pipe is slidingly sealed with piston cooling nozzle 5 by alignment pin 7 and is connected.It is fixed
The setting of position pin, ensure that being reliably connected for flexible hollow pipe and piston cooling nozzle, and with certain rotary freedom,
Ensure that during piston movement to Main thrust face the derivation mechanism will not be damaged.
As shown in Figure 3 and Figure 5, flexible hollow pipe is preferably formed by some mutual intussusceptions of oil pipe, adjacent two oil pipes it
Between be and be slidably connected.
Further, every oil pipe is both preferably conical pipe, and the every conical horn hole of oil pipe is preferably fuel-displaced towards cooling
The direction in hole.Certainly, as replacement, the conical horn hole of oil pipe also can be towards fuel feed hole direction.
The setting of above-mentioned conical pipe, disengagement when can prevent oil pipe folded tube from launching, because not having between each section pipe
There is specific position limiting structure, be so not in upon deployment situation about being disengaged between section and section so being designed to conical pipe.
In addition, the collapsing length of flexible hollow pipe is more than more than engine strokes.
Flexible hollow pipe can be stretched with the reciprocating motion of piston, and signal transmssion line can stretching with flexible hollow pipe
Indentation row launches and folds.
Signal transmssion line with flexible hollow pipe the flexible implementation launched and folded, it is preferred with the following two kinds
Embodiment.
Embodiment 1
Signal transmssion line is overlayed in the middle cavity of flexible hollow pipe.
Embodiment 2
As shown in Figure 6 and Figure 7, flexible hollow pipe periphery is set with spring, outside the flexible hollow pipe at adjacent piston cooling nozzles
It is fixed with spring base 9 week.One end of above-mentioned spring is fixedly connected with the piston, the bullet at the other end and piston cooling nozzle of spring
Spring abutment is fixedly connected, and spring is launched and folded with the flexible of flexible hollow pipe, signal transmssion line along spring spiral
Direction is adhesively fixed on the spiral winding 8 of spring.
Derivation mechanism method for arranging is：According to specific measurement purpose, the correct position processed sensor peace on piston
Dress hole and install sensor 1, signal transmssion line 4 install on the piston 2 derivation mechanism after being put into the derivation mechanism, Ran Houan
Dress piston cooling nozzle 5, confirms piston to be loaded on engine after installation reliability is errorless and completes the integral installation of engine, entirely
Correlation test work can be carried out after the completion of portion.Concrete structure is as shown in Fig. 1 ~ Fig. 3.
When Fig. 1 show piston in top dead center position, stretch hollow pipe elongation, showing when signal transmssion line launches therewith
It is intended to；When Fig. 2 is that piston is in bottom dead center position, the hollow pipe that stretches shortens, schematic diagram when signal transmssion line is folded therewith.
In addition, if for particular sensor in a set of above-mentioned derivation mechanism during difficult arrangement, can be in piston
Cooling oilhole in arrangement second set identical derivation mechanism, both be implemented in combination with measurement purpose.
After the present invention uses said structure, the measurement signal by way of being mounted directly sensor, and by described in patent
Derivation mechanism protection under signal transmssion line transmit to the external world, the flexible hollow pipe in the derivation mechanism is to signal transmssion line energy
Storage and guide effect are played, can be prevented effectively from when piston is quickly moved and be caused damage because signal transmssion line swings or winds
Situation, so as to realize the continuous measurement to temperature signal at piston and transmitting.
Further, since measurement circuitry is caused the external world by the position taken full advantage of at piston cooling nozzle, can effectively keep away
Exempt from the change to engine body, can effectively shorten the test period, reduce experimentation cost.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (7)
1. in a kind of engine cylinder measurement signal derivation mechanism, it is characterised in that：The derivation mechanism is arranged in engine cylinder
Piston on, for the signal transmssion line in piston to be led into external engine；
Sensor, horizontal cooling oil duct and vertical cooling oil outlet, cooling oil duct and cooling oil outlet are provided with piston
It is connected；The sensor that signal transmssion line will be arranged in piston is connected with the monitoring device of external engine；
Derivation mechanism is a hollow flexible hollow pipe；One end of flexible hollow pipe is stretched into the cooling oil outlet in piston,
And be fixedly connected with the piston；Stretch into and oily passage was provided with the flexible side wall of hollow pipe in cooling oil outlet, the excessively oily passage
Cooling oil duct can be connected with the middle cavity of flexible hollow pipe；
The other end of flexible hollow pipe is slidingly sealed with piston cooling nozzle by alignment pin and is connected；
Signal transmssion line is wrapped in the periphery of flexible hollow pipe or overlays in the middle cavity of flexible hollow pipe, and stretch hollow pipe energy
As the reciprocating motion of piston is stretched, signal transmssion line can be launched and folded with the flexible of flexible hollow pipe.
2. in engine cylinder according to claim 1 measurement signal derivation mechanism, it is characterised in that：The sensor bag
Include temperature sensor.
3. in engine cylinder according to claim 1 measurement signal derivation mechanism, it is characterised in that：It is described flexible hollow
Pipe is formed by some mutual intussusceptions of oil pipe, is between adjacent two oil pipes and is slidably connected.
4. in engine cylinder according to claim 3 measurement signal derivation mechanism, it is characterised in that：Every oil pipe is
Conical pipe.
5. in engine cylinder according to claim 1 measurement signal derivation mechanism, it is characterised in that：Flexible hollow pipe
Collapsing length is more than more than engine strokes.
6. in engine cylinder according to claim 1 measurement signal derivation mechanism, it is characterised in that：Outside flexible hollow pipe
Week is set with spring, and one end of the spring is fixedly connected with the piston, and the other end of spring is fixedly connected with piston cooling nozzle, bullet
Spring is launched and is folded with the flexible of flexible hollow pipe, and signal transmssion line is adhesively fixed on bullet along the hand of spiral of spring
On the spiral winding of spring.
7. in engine cylinder according to claim 1 measurement signal derivation mechanism, it is characterised in that：Flexible hollow tube side
The excessively oily passage and the height flush of cooling oil duct set on wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009985.8A CN106872057B (en) | 2017-01-06 | 2017-01-06 | Leading-out mechanism for measuring signal in engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009985.8A CN106872057B (en) | 2017-01-06 | 2017-01-06 | Leading-out mechanism for measuring signal in engine cylinder |
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| CN106872057A true CN106872057A (en) | 2017-06-20 |
| CN106872057B CN106872057B (en) | 2020-03-17 |
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| CN201710009985.8A Active CN106872057B (en) | 2017-01-06 | 2017-01-06 | Leading-out mechanism for measuring signal in engine cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238511A (en) * | 2018-07-19 | 2019-01-18 | 中国航发沈阳发动机研究所 | A kind of temperature test detector probe |
| CN111412055A (en) * | 2020-03-27 | 2020-07-14 | 河北科技大学 | Piston cooling device |
| CN114279711A (en) * | 2021-12-23 | 2022-04-05 | 中国船舶重工集团公司第七一一研究所 | Piston heat transfer test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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