CN206638425U - Constant volume combustion bomb heater - Google Patents
Constant volume combustion bomb heater Download PDFInfo
- Publication number
- CN206638425U CN206638425U CN201720271253.1U CN201720271253U CN206638425U CN 206638425 U CN206638425 U CN 206638425U CN 201720271253 U CN201720271253 U CN 201720271253U CN 206638425 U CN206638425 U CN 206638425U
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- constant volume
- bullet
- temperature sensor
- heating
- wall temperature
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Abstract
The utility model discloses a kind of constant volume combustion bomb heater, the device includes uniform winding in the heating tape on constant volume bullet body surface, the inside and outside wall of constant volume bullet body is respectively arranged with bullet inner wall temperature sensor, play outside wall temperature sensor, the signal output part for playing inner wall temperature sensor and bullet outside wall temperature sensor is connected by controller with PC respectively, controller has three output ends, the input of one output end and electric supply installation connects, one output end is connected by vavuum pump with pumping magnetic valve, another output end is connected with exhaust solenoid valve, the output end of electric supply installation and heating band connection.It is with voltage that the utility model adjusts heating according to constant volume bullet internal-external temperature difference, makes heating with voltage and is constantly made a response according to constant volume bullet internal-external temperature difference, is further increased with limiting the temperature difference, ensures the uniformity of heating；Meanwhile constant volume bullet voltage is adjusted step by step according to difference variation so that heating is with voltage to more they tend to linear change, the time required to shortening heating process.
Description
Technical field
Technical field of internal combustion engines is the utility model is related to, in particular to a kind of constant volume combustion bomb heater.
Background technology
To alleviate energy shortage and reducing environmental problem, alternative fuel is just turning into the study hotspot of field of internal combustion engine.Fuel
The degree of perfection of burning affects the dynamic property, economy and emission performance of engine, therefore, it is necessary to study the combustion of fuel
Burn characteristic.Due to the operating mode of engine and the unstability of condition, it is difficult to accomplish that combustion case is completely the same.And constant volume combustion bomb
Experimental provision realizes that burning condition is unanimously relatively easy, is easy to combustion characteristics that is qualitative and determining quantifier elimination fuel.In order to probe into
Influence of the initial temperature to fuel combustion characteristics is, it is necessary to regulate and control the initial temperature of fuel-air mixture.Heat the mixture to
Preset temperature needs to aid in completing by heating system.Low-power heating will certainly cause the efficiency of heating surface low, heat time length；With
High-power heating can improve the efficiency of heating surface, shorten and add the time, but easily mixture temperature is exceeded preset temperature.Its
It is secondary, in constant volume combustion bomb experiment is carried out, distribution is typically carried out using partial pressure distribution method, it can be seen from the equation of gas state, temperature
The unstable fluctuation for inevitably resulting in pressure gauge reading of degree, has a strong impact on conventional efficient, or cause the error of experimental result.
In addition, fuel combustion heat release, temperature drastically raises in constant volume combustion bomb, in the presence of heat transfer and heat radiation, constant volume burning
Playing the temperature of inside and outside wall can gradually rise with the development of experiment.
The content of the invention
The purpose of this utility model, which is just to provide, a kind of can quickly heat and stably add to the constant volume combustion bomb of preset temperature
Thermal.
To achieve the above object, a kind of constant volume combustion bomb heater designed by the utility model, including uniform winding
In the heating tape on constant volume bullet body surface, it, which is characterized in that, can be close to constant volume bullet outside wall surface and to provide output higher
Heat flow density, the inwall of the constant volume bullet body is provided with and plays inner wall temperature sensor, outer wall is provided with and plays outside wall temperature sensing
Device, the signal output part for playing inner wall temperature sensor and playing outside wall temperature sensor are connected by controller and PC respectively
Connect, the controller has three output ends, and the input connection of an output end and electric supply installation, an output end passes through true
Empty pump is connected with pumping magnetic valve, and another output end is connected with exhaust solenoid valve, the output end of the electric supply installation and heating
Band connection.
Further, the bullet outside wall temperature sensor is SMD temperature sensor.SMD temperature sensor can be with
It is close to hold and plays outer wall, and it is big with the contact area of outer wall, it more can accurately and rapidly measure the temperature of constant volume bullet outer wall.
Further, the bullet inner wall temperature sensor is sonde-type temperature sensor.Sonde-type temperature sensor can
To extend into inside, the temperature for playing designated area fluid media (medium) near wall is measured.
It is with voltage that the utility model adjusts heating according to constant volume bullet internal-external temperature difference, makes heating with voltage according in constant volume bullet
The outer temperature difference is constantly made a response, and is further increased with limiting the temperature difference, ensures the uniformity of heating；Meanwhile constant volume bullet voltage according to
Difference variation is adjusted step by step so that heating is with voltage to more they tend to linear change, the time required to shortening heating process.
Compared with prior art, the beneficial effects of the utility model are：1) heater can greatly reduce constant volume bullet
Time needed for heating process, the time required for constant volume bullet to be heated to stable state using the utility model can save 30-60
Minute；2) the utility model heating device is used, constant volume bullet is in heating process, and in bullet and the outer temperature difference of bullet is smaller, heating
Uniformity is more preferable, and the maximum temperature difference in constant volume bullet bullet with outer wall wants small 5-15K.The utility model significantly improves homogeneous heating
Property, while the thermal stress that constant volume bullet body is born in heating process is reduced, extend the service life of equipment.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the flow chart using heating means of the present utility model.
In figure：Heating tape 1, inner wall temperature sensor 2 is played, play outside wall temperature sensor 3, controller 4, PC 5, vavuum pump
6, it is evacuated magnetic valve 7, exhaust solenoid valve 8, electric supply installation 9.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in figure 1, a kind of constant volume combustion bomb heater of the present utility model includes electric supply installation 9, heating tape 1, bullet
Inner wall temperature sensor 2, play outside wall temperature sensor 3, controller 4, PC 5, vavuum pump 6, pumping magnetic valve 7, exhaust electromagnetism
Valve 8 and insulation material.
The inwall of constant volume bullet body is provided with and plays inner wall temperature sensor 2, outer wall is provided with and plays outside wall temperature sensor 3,
The signal output part for playing inner wall temperature sensor 2 and bullet outside wall temperature sensor 3 is connected by controller 4 with PC 5 respectively, point
The bullet inwall of constant volume bullet, bullet outside wall temperature Yong Yu not be sent to controller 4 and PC 5.Controller 4 has three output ends,
One output end is connected with the input of electric supply installation 9, and an output end is connected by vavuum pump 6 with pumping magnetic valve 7, another
Individual output end is connected with exhaust solenoid valve 8.The output end of electric supply installation 9 is connected with heating tape 1.The uniform winding of heating tape 1 is fixed
Hold and play body surface.PC and controller adjust the output voltage of electric supply installation 9 according to preset temperature, reach to electric supply installation 9
It is carried in voltage on heating tape 1 accordingly to be adjusted, so as to realize the control to temperature in constant volume bullet bullet.Vavuum pump 6 and pumping
Magnetic valve 7 is used to extract the waste gas in body, makes to reach vacuum state inside constant volume bullet；Insulation material is wrapped in body appearance
Face, to reduce the temperature loss of fluid media (medium) in bullet.
Carried out using the utility model when temperature is tested higher than the constant volume bullet of normal temperature, it is necessary to snap into capable heating to constant volume.This
The temperature control method for the constant volume combustion bomb heater that utility model provides, comprises the following steps：
1) utilize and play the bullet inner wall temperature Tn that inner wall temperature sensor 2 gathers constant volume bullet, by Tn compared with preset temperature Ts,
If Tn ＜ Ts, the voltage of electric supply installation 9 is adjusted to any voltage value in 140,150V, 170V, 180V；
2) using play inner wall temperature sensor 2 and play outside wall temperature sensor 3 gather constant volume bullet bullet inner wall temperature Tn and
Outside wall temperature Tw is played, if Tw-Tn >=50K, the voltage of electric supply installation 9 is reduced into 5V, this step was repeated once every 20 minutes,
Voltage 5V is lowered every time, until Tw-Tn ＜ 50K, into step 3)；
3) using the bullet inner wall temperature Tn for playing the collection constant volume bullet of inner wall temperature sensor 2, if Ts-Tn ＜ 5K, power supply is filled
The voltage for putting 5 reduces 1V, repeats this step at intervals of two minutes until Ts=Tn；
4) electrode ignition in the bullet of constant volume bullet, carries out spherical propagating flame experiment, and the fuel gas in bullet burns rapidly, bullet
Interior temperature and pressure rises rapidly, now Tn ＞ Ts；
5) the pumping magnetic valve 7 being connected with vavuum pump 6 is opened, takes out the high-temp waste gas in constant volume bullet, temperature is slow in bullet
Reduce；
6) as pressure P in bullet0During equal to 0.5kPa, exhaust solenoid valve 8 is opened, temperature Tn is quickly reduced in bullet, works as Tn=
During Ts, air bleeding valve 8 is closed；
7) as pressure P in bullet0During=0kPa, vavuum pump 6 and pumping magnetic valve 7 are closed；
8) next round distribution operation is carried out, burning mixture is injected into constant volume bullet, has after distribution again, plays inwall
Temperature Tn and preset temperature Ts can change, return to step 1) repeat.
Although preferred embodiment of the present utility model is described above in conjunction with accompanying drawing, the utility model is not
Above-mentioned specific real mode is confined to, above-mentioned embodiment is only schematical, is not restricted, this area
Those of ordinary skill under enlightenment of the present utility model, do not departing from the utility model aims and claimed model
In the case of enclosing, the specific conversion of many forms can also be made, these are belonged in the scope of protection of the utility model.
Claims (3)
1. a kind of constant volume combustion bomb heater, including uniform winding exist in the heating tape (1) on constant volume bullet body surface, its feature
In：The inwall of the constant volume bullet body is provided with and plays inner wall temperature sensor (2), outer wall is provided with and plays outside wall temperature sensor
(3), the signal output part for playing inner wall temperature sensor (2) and playing outside wall temperature sensor (3) passes through controller (4) respectively
It is connected with PC (5), the controller (4) has three output ends, and an output end and the input of electric supply installation (9) connect
Connect, an output end is connected by vavuum pump (6) with pumping magnetic valve (7), and another output end connects with exhaust solenoid valve (8)
Connect, the output end of the electric supply installation (9) is connected with heating tape (1).
2. constant volume combustion bomb heater according to claim 1, it is characterised in that：The bullet inner wall temperature sensor
(2) it is SMD temperature sensor.
3. the constant volume combustion bomb heater according to claims 1 or 2, it is characterised in that：The bullet outside wall temperature passes
Sensor (3) is sonde-type temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271253.1U CN206638425U (en) | 2017-03-20 | 2017-03-20 | Constant volume combustion bomb heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271253.1U CN206638425U (en) | 2017-03-20 | 2017-03-20 | Constant volume combustion bomb heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206638425U true CN206638425U (en) | 2017-11-14 |
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ID=60249020
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720271253.1U Active CN206638425U (en) | 2017-03-20 | 2017-03-20 | Constant volume combustion bomb heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206638425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908247A (en) * | 2017-03-20 | 2017-06-30 | 武汉理工大学 | Constant volume combustion bomb heater and temperature control method |
-
2017
- 2017-03-20 CN CN201720271253.1U patent/CN206638425U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908247A (en) * | 2017-03-20 | 2017-06-30 | 武汉理工大学 | Constant volume combustion bomb heater and temperature control method |
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