CN201614999U - Diesel locomotive diesel preheating system - Google Patents
Diesel locomotive diesel preheating system Download PDFInfo
- Publication number
- CN201614999U CN201614999U CN2009202550458U CN200920255045U CN201614999U CN 201614999 U CN201614999 U CN 201614999U CN 2009202550458 U CN2009202550458 U CN 2009202550458U CN 200920255045 U CN200920255045 U CN 200920255045U CN 201614999 U CN201614999 U CN 201614999U
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- fuel
- oil
- diesel
- preheating
- preheating system
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Abstract
A diesel locomotive diesel preheating system comprises a fuel tank, a fuel pre-heater and a fuel coarse strainer, and is characterized in that a fuel inlet pipeline of the fuel pre-heater is connected with the fuel box; and a fuel outlet pipeline of the fuel pre-heater is connected with the fuel coarse strainer. By arranging the pre-heater into the fuel inlet pipeline, the diesel locomotive diesel preheating system can preheat all fuel entering a diesel engine, and enables a machine to realize the requirement of fuel preheating under any load conditions. A constant-temperature control valve is added in the pipeline, thereby the preheating system is capable of controlling oil temperature entering the coarse strainer and ensuring fuel safety.
Description
Technical field
The utility model relates to a kind of diesel engine oil circuit heating system, is suitable for using in the internal combustion locomotive diesel engine.
Background technique
The diesel engine of locomotive of present domestic operation is different by the ambient temperature of Various Seasonal and different regions, adopts respectively and fine-quality diesel oils such as-35 No. 10, No. 0 ,-No. 10 ,-No. 20 of the GB regulation.Celsius temperature scale-condensation point when diesel oil trade mark digitized representation diesel oil loses flowability at low temperatures.But diesel oil is before near condensation point, and the part can have paraffin shape crystalline solid to separate out earlier.This temperature value when beginning to separate out crystal is called cloud point.For example the cloud point of No. 0 diesel oil is 3-10 ℃, and when using in the cloud point district, the flow resistance of diesel oil increases, and crystal easily makes path blockade, the fuel feeding deficiency, and atomization badness, even can make failure of oil feed.In addition, along with ambient temperature reduces, diesel oil degree of being stained with increases, and mobile the reduction can increase the filtering resistance, and combustion position worsens.When diesel engine is started under low temperature condition, engine body or the parts on it are cracked, destroy the sealability of seal connector in the cooling system.
Addressing the above problem the simplest way is to select low grade diesel oil.Promptly select cloud point values to exceed the diesel oil of ambient temperature or 3-5 ℃ of label of fuel oil the temperature inside the box, when being lower than 10 ℃, select-No. 10 diesel oil such as ambient temperature.This method direct result is to have increased fuel cost greatly.In order to use the higher diesel oil of index value as much as possible, people have designed the diesel oil preheating device on diesel engine.
Domestic existing df diesel locomotive promptly is equipped with diesel oil preheating system, this type locomotive is provided with an oil preheater that utilizes circulating water to heat in return line, as shown in Figure 1, install an oil preheater additional in the back of fuel oil pressure-limit valve, when diesel engine is worked, to burn remaining and carry out preheating above the oil return of certain pressure, fuel tank be returned in the oil return after the preheating, and the oil in the fuel tank is heated.The defective of this preheating method is, if diesel load from low to high the time, employed diesel oil increases gradually, and the pressure-limit valve recirculating oil quantity reduces not even oil return, to making pre-thermal failure.In addition, the oil mass of being returned by pressure-limit valve is also limited in normal operation, relies on this limited oil mass that fuel oil in the fuel tank is carried out preheating, and effect is also not so good.
Summary of the invention
The utility model has designed a kind of internal combustion locomotive diesel oil preheating system at the deficiency that above-mentioned prior art exists, and has solved diesel engine and has utilized the oil return preheating can not satisfy the problem of preheating.
A kind of internal combustion locomotive diesel oil preheating system of the present utility model comprises fuel tank, oil preheater and fuel preliminary filter, it is characterized in that the in-line of described oil preheater is connected with fuel tank; Its fuel-displaced pipeline links to each other with fuel preliminary filter.
Described internal combustion locomotive diesel oil preheating system, it has a thermostatic control valve, described thermostatic control valve comprises a filler opening and first oil outlet, two oil outlets of second oil outlet, wherein the fuel-displaced pipeline of oil-feed and fuel tank joins, first oil outlet and the oil preheater in-line of thermostatic control valve join, and second oil outlet is connected with second filler opening of fuel preliminary filter.
Internal combustion locomotive diesel oil preheating system of the present utility model places in-line with preheater, all oil plants that enter diesel engine can be carried out preheating, makes machine under any load condition, all can realize the requirement of fuel-firing preheating.In pipeline, increase a thermostatic control valve, can control the oil temperature that enters the coarse filtration valve, guarantee fuel oil safety.Adopt internal combustion locomotive diesel oil preheating system of the present utility model, can guarantee to select for use when locomotive refuels in the winter time the diesel oil of a low label and do not influence the locomotive proper functioning.Realize saving the purpose of fuel cost.
Description of drawings
Fig. 1 is existing locomotive fuel-firing preheating system diagram
Fig. 2 is internal combustion locomotive diesel oil preheating system figure of the present utility model
Embodiment
Oil preheater of the present invention is still continued to use the oil preheater of prior art, promptly adopts the heat energy of locomotive circulating water that fuel oil is carried out preheating.Be safety, save the energy again.And be easy to transform, simple to operate.The in-line of this preheater is connected with fuel tank, fuel-displaced pipeline then links to each other with the system fuel preliminary filter, working as fuel from fuel tank like this comes out through the preheater preheating after strainer is divided into two-part, a part enters diesel engine system, because fuel oil is through preheating, all unblocked when therefore it is through parts such as all pipelines or various valve, pumps, the fuel oil oil temperature that enters diesel fuel engine injection system at last is suitable, and atomizing effect can meet the demands fully.Another part is in safety valve is back to fuel tank, with the fuel-firing preheating in the fuel tank.Avoid diesel oil crystallization or stickiness increase in the fuel tank.
During diesel engine work, fuel oil temperature must not be higher than its flash temperature, otherwise can cause security incident, and therefore, when using usually, fuel oil temperature is than low 5 ℃ at least of flash temperatures.Fuel oil temperature surpasses flash temperature or does not close summer under the situation such as oil preheater water route valve when preventing the winter preheating, cause the excessive preheating of fuel oil and surpass its ignition temperature, in system, increased thermostatic control valve fuel-firing preheating has been controlled automatically, on fuel preliminary filter, set up simultaneously one second filler opening and join with second oil outlet of thermostatic control valve.Described thermostatic control valve adopts a heat-operated valve, prescribes a time limit (as 30 ℃) when fuel oil temperature is lower than under the setting temperature, and fuel oil is all undertaken entering strainer after the preheating by oil preheater; If when fuel oil temperature is higher than capping (as 40 ℃), then fuel oil all directly enters fuel preliminary filter by second oil outlet of radiator valve.If fuel oil temperature is between the setting temperature lower limit and the upper limit time, between 30-40 ℃, then a fuel oil part of coming out from fuel tank enters strainer through preheater, and another part then directly enters fuel preliminary filter from second oil outlet of thermostatic control valve.Enter fuel system for diesel engine through the fuel preliminary filter outlet.
Claims (2)
1. an internal combustion locomotive diesel oil preheating system comprises fuel tank, oil preheater and fuel preliminary filter, it is characterized in that the in-line of described oil preheater is connected with fuel tank; Its fuel-displaced pipeline links to each other with fuel preliminary filter.
2. according to the internal combustion locomotive diesel oil preheating system of claim 1, it is characterized in that having a thermostatic control valve, described thermostatic control valve comprises a filler opening and first oil outlet, two oil outlets of second oil outlet, wherein the fuel-displaced pipeline of filler opening and fuel tank joins, first oil outlet and the oil preheater in-line of thermostatic control valve join, and second oil outlet is connected with second filler opening of fuel preliminary filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202550458U CN201614999U (en) | 2009-12-17 | 2009-12-17 | Diesel locomotive diesel preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202550458U CN201614999U (en) | 2009-12-17 | 2009-12-17 | Diesel locomotive diesel preheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201614999U true CN201614999U (en) | 2010-10-27 |
Family
ID=43001368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202550458U Expired - Lifetime CN201614999U (en) | 2009-12-17 | 2009-12-17 | Diesel locomotive diesel preheating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201614999U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788050A (en) * | 2012-07-27 | 2012-11-21 | 柳州柳工挖掘机有限公司 | Oil changing and buffering device and pilot hydraulic control system with same |
| CN105114229A (en) * | 2015-09-11 | 2015-12-02 | 中国北车集团大连机车研究所有限公司 | Low-temperature preheating system for fuel of diesel engine |
-
2009
- 2009-12-17 CN CN2009202550458U patent/CN201614999U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788050A (en) * | 2012-07-27 | 2012-11-21 | 柳州柳工挖掘机有限公司 | Oil changing and buffering device and pilot hydraulic control system with same |
| CN105114229A (en) * | 2015-09-11 | 2015-12-02 | 中国北车集团大连机车研究所有限公司 | Low-temperature preheating system for fuel of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101027 |