CN218760187U

CN218760187U - Oil supply system and working machine

Info

Publication number: CN218760187U
Application number: CN202223600475.3U
Authority: CN
Inventors: 戚小龙; 顾骏; 张春
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-03-28
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to an oil tank field provides an oil feeding system and operation machinery, when the operation machinery that is provided with this oil feeding system starts at low temperature environment, makes the fuel oil feeding pipeline intercommunication of second oil storage chamber and engine that has stored low-grade fuel through first change-over valve. After the operating machine is started, the heating device heats the fuel in the first fuel storage cavity. When the fuel in the first oil storage cavity is heated to a temperature higher than a preset temperature, the first oil storage cavity is communicated with an oil supply pipeline of the engine through a first switching valve. Before the working machine stops working, the second oil storage cavity is communicated with the oil supply pipeline of the engine again through the first change-over valve, so that the working machine stops after the oil supply pipeline of the engine is filled with low-grade fuel oil. The utility model provides an oil feeding system can solve the whole problem that uses low-grade fuel work to lead to the cost-push.

Description

Oil supply system and working machine

Technical Field

The utility model relates to an oil tank technical field especially relates to an oil feeding system and operation machinery.

Background

The freezing point and the cold filter plugging point are important indexes for representing the low-temperature service performance of the diesel oil. The automobile diesel oil is divided into six labels of 5#, 0#, -10#, -20 #, -35#, -50# according to the condensation point. The pour point is the highest temperature indicating that the diesel loses fluidity in a low temperature environment; the cold filter plugging point indicates the highest temperature at which the diesel oil can cause filter screen plugging when passing through the oil supply system of the diesel engine. When the diesel engine works, the diesel oil is sprayed into the cylinder through the coarse and fine filters, the high-pressure pump and the oil nozzle. When the temperature of the diesel oil is reduced to the cold filter plugging point temperature, the formed wax crystals can block the filter to influence the normal oil supply of the oil way, and further influence the normal work of the engine.

At present, an excavator, a crane and other working machines taking diesel oil as fuel are generally only provided with one oil tank, when the cold filter plugging point of the diesel oil filled in the oil tank is higher than the ambient temperature and the working machines are parked for a long time in the environment, the fuel oil can be frozen and waxed, so that the working machines cannot be started normally.

In the prior art, the problem is generally solved by filling diesel oil with a cold filter plugging point lower than the temperature of the working environment in order to prevent fuel oil from freezing and waxing, but the lower the cold filter plugging point is, the more expensive the price of the diesel oil is, and the use cost of the working machine is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil feeding system and operation machinery for solve the diesel oil that adopts the low cold filter plugging of filling among the prior art and solve the problem that the fuel freezes, the waxing leads to the defect of cost increase, realize using low-grade diesel starting machinery, and heat high-grade diesel oil simultaneously, switch high-grade diesel oil and carry out work when high-grade diesel oil temperature reaches the cold filter plugging, and then reduce cost's effect.

The utility model provides an oil feeding system, include: the fuel tank is internally provided with a first fuel storage cavity and a second fuel storage cavity, and the grade of fuel stored in the first fuel storage cavity is greater than that of fuel stored in the second fuel storage cavity; the first switching valve is arranged on the oil tank and is used for selectively communicating the first oil storage cavity or the second oil storage cavity with an oil supply pipeline of an engine; and the heating device is connected with the oil tank and used for heating the fuel oil in the first oil storage cavity.

According to the utility model provides an oil supply system, still include control module, control module with the electricity of first change-over valve is connected, and control module is used for detecting the oil temperature in the first oil storage intracavity; when the oil temperature in the first oil storage cavity is lower than a preset temperature, the control module controls the first switching valve to be communicated with the second oil storage cavity and the engine to supply the oil pipeline, when the oil temperature in the first oil storage cavity reaches the preset temperature, the control module controls the first switching valve to be communicated with the first oil storage cavity and the engine to supply the oil pipeline.

According to the utility model provides an oil supply system, control module includes ECU and temperature detecting element, temperature detecting element with first change-over valve all with the ECU electricity is connected.

According to the utility model provides an oil supply system, be provided with the oil filler on the oil tank, oil filler department is provided with the second change-over valve, the oil filler communicates simultaneously first oil storage chamber with second oil storage chamber, the second change-over valve is used for the optional messenger fuel to fill first oil storage chamber or in the second oil storage chamber.

According to the utility model provides an oil supply system, the second change-over valve includes: one end of the valve body is communicated with the oil filling port, and the other end of the valve body is provided with a filling port; the valve core is rotatably arranged in the valve body, when the valve core is positioned at a first position, the valve core conducts the filling port and the first oil storage cavity, and when the valve core is positioned at a second position, the valve core conducts the filling port and the second oil storage cavity.

According to the utility model provides an oil supply system, heating device includes the water tank, the water tank sets up the inboard or the outside of oil tank, the water tank intercommunication is in on the cooling water circulation pipeline of engine.

According to the oil supply system provided by the utility model, a bypass pipeline and a third change-over valve are further arranged on the cooling water circulation pipeline of the engine, two ends of the bypass pipeline are respectively connected with the water inlet end and the water outlet end of the water tank, and the third change-over valve is connected with the ECU; when the oil temperature in the first oil storage cavity is lower than the preset temperature, the ECU controls the third change-over valve to only conduct the water outlet end of the cooling water of the engine and the water inlet end of the water tank, and when the oil temperature in the first oil storage cavity reaches the preset temperature, the ECU controls the third change-over valve to only conduct the water outlet end of the cooling water of the engine and the water inlet end of the bypass pipeline.

According to the utility model provides an oil feeding system, first oil storage chamber with the second oil storage intracavity all is provided with the level gauge.

According to the utility model provides an oil supply system, the bottom of oil tank is provided with waste fitting discharging, waste fitting discharging with the end intercommunication that goes out oil of first change-over valve, just still be provided with oil-out and outlet on the waste fitting discharging.

The utility model also provides an operation machinery, include as above oil feeding system.

The utility model provides an oil supply system, including oil tank, first change-over valve and heating device. Be provided with first oil storage chamber and second oil storage chamber in the oil tank, the grade of the fuel of storing in the first oil storage chamber is greater than the grade of the fuel of storing in the second oil storage chamber. The first switching valve is arranged on the oil tank and is used for selectively communicating the first oil storage cavity or the second oil storage cavity with an oil supply pipeline of the engine. The heating device is connected with the oil tank and used for heating fuel oil in the first oil storage cavity. When the working machine with the oil supply system is started in a low-temperature environment, the second oil storage cavity is communicated with an oil supply pipeline of the engine through the first change-over valve, and low-grade fuel oil is stored in the second oil storage cavity, so that the working machine can be normally started in the low-temperature environment. After the operation machinery is started, the heating device can work normally, and the heating device heats the fuel oil in the first oil storage cavity. When the fuel oil in the first oil storage cavity is heated to be above a cold filter plugging point, the first oil storage cavity is communicated with an oil supply pipeline of the engine through a first switching valve. Before the operation machine stops working, the second oil storage cavity is communicated with the oil supply pipeline of the engine again through the first change-over valve, and after the operation machine works for a period of time, the oil supply pipeline of the engine is filled with low-grade fuel oil, the operation machine is stopped, so that the problems that high-grade fuel oil exists in the oil supply pipeline, the high-grade fuel oil is frozen and waxed at low temperature to block the oil supply pipeline, and the operation machine cannot be started can be solved. The utility model provides an oil feeding system can realize using the low-grade fuel when starting, when heating device heats the high-grade fuel to more than the cold filter plugging point, uses the effect of high-grade fuel work, can solve the problem that whole use low-grade fuel work leads to the cost-push.

Further, the utility model provides an among the oil feeding system, still include control module, control module is connected with first conversion valve electricity, and is used for detecting the oil temperature in the first oil storage intracavity. The control module can detect the oil temperature in the first oil storage cavity after the operation machine is electrified, selectively communicate the first oil storage cavity with an oil supply pipeline of the engine when the oil temperature reaches a preset temperature, selectively communicate the second oil storage cavity with the oil supply pipeline of the engine when the oil temperature is lower than the preset temperature, start the operation machine by using low-grade fuel oil, detect the oil temperature in the first oil storage cavity in real time after starting, cut off the communication between the second oil storage cavity and the oil supply pipeline after the oil temperature in the first oil storage cavity reaches the preset temperature, and communicate the first oil storage cavity with the oil supply pipeline. Therefore, when the temperature of the fuel oil in the first oil storage cavity reaches the preset temperature, the controller can preferably select the first oil storage cavity to supply high-grade fuel oil, the use of low-grade fuel oil is reduced as much as possible, and the economical efficiency of the working machine is improved.

Further, the utility model provides an among the oil feeding system, set up an oil filler hole on the oil tank, the oil filler hole communicates first oil storage chamber and second oil storage chamber simultaneously, and sets up the second change-over valve in oil filler hole department, and the optional fuel that makes the filling of second change-over valve gets into first oil storage chamber or second oil storage chamber. The second change-over valve can be arranged to enable only one oil filling opening to be arranged on the oil tank.

Further, the present invention provides a working machine having the same advantages as described above since the oil supply system is provided.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first schematic structural diagram of an oil supply system provided by the present invention;

fig. 2 is a schematic structural diagram ii of the oil supply system provided by the present invention;

fig. 3 is a schematic structural diagram three of the oil supply system provided by the present invention;

fig. 4 is a schematic view of the internal structure of the fuel tank provided by the present invention;

fig. 5 is a cross-sectional view of an oil supply system provided by the present invention;

fig. 6 is a schematic piping diagram of a heating device provided by the present invention;

reference numerals:

100: an oil tank; 110: a first oil storage chamber; 120: a second oil storage chamber; 130: a first separator; 140: a second separator; 150: an oil filler; 160: a water tank; 161: a water inlet; 162: a water outlet; 170: an oil return port; 200: a first switching valve; 210: a first oil inlet; 220: a second oil inlet; 230: a first oil outlet; 310: an ECU;320: a temperature sensor; 400: a second switching valve; 410: a valve body; 420: a valve core; 430: an operating handle; 510: a cooling water circulation line; 520: a heat sink; 530: a bypass line; 540: a third switching valve; 600: a liquid level meter; 700: a liquid level liquid thermometer; 800: a sewage draining device; 810: a second oil outlet; 820: a water outlet.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The oil supply system and the working machine according to the present invention will be described with reference to fig. 1 to 6.

The utility model provides an oil feeding system, this oil feeding system include oil tank 100, first change-over valve 200 and heating device. Wherein, the oil tank 100 is provided with a first oil storage chamber 110 and a second oil storage chamber 120 which are independent of each other, and the first oil storage chamber 110 is used for storing high-grade diesel oil, such as 5# or 0# diesel oil, and the second oil storage chamber 120 is used for storing low-grade diesel oil, such as-10 #, -20 #, -35#, -50# diesel oil. The first switching valve 200 is provided on the oil tank 100 to selectively communicate the first oil storage chamber 110 with a supply line of the engine or communicate the second oil storage chamber 120 with a supply line of the engine. A heating device is provided on the fuel tank 100 for heating the high grade diesel fuel in the first fuel storage chamber 110.

When the operation machine provided with the oil supply system is parked in a low-temperature environment for a long time, the high-grade diesel oil can be frozen and waxed, and the low-grade diesel oil can flow normally. Therefore, when the working machine provided with the oil supply system is started up in a low temperature environment, the second oil storage chamber 120 is controlled to communicate with the oil supply line of the engine by the first switching valve 200, and the working machine is started up using low-grade fuel. After the operating machine is started, the heating device may be operated synchronously to heat the high-grade fuel oil in the first oil storage chamber 110, and when the oil temperature of the high-grade fuel oil in the first oil storage chamber 110 rises to a preset temperature, the first switching valve 200 may cut off the communication between the second oil storage chamber 120 and the oil supply line of the engine, and at the same time, the first switching valve 200 may conduct the oil supply line between the first oil storage chamber 110 and the engine, so as to operate using the high-grade diesel oil.

It should be noted that the preset temperature is a cold filter plugging point temperature of the fuel filled in the first reservoir chamber 110, which is a temperature enabling the engine to normally operate.

Therefore, the utility model provides an oil feeding system can realize that the low-grade fuel starts, heats the high-grade fuel after starting, after the high-grade fuel reaches preset temperature, switches the effect that the high-grade fuel feeding carried out work, has solved the problem of the whole cost increase that leads to of using the low-grade fuel feeding among the prior art.

In an embodiment of the present invention, the oil supply system further includes a control module. The first switching valve 200 may be an electromagnetic switching valve, and the first switching valve 200 may include a first oil inlet 210, a second oil inlet 220, and a first oil outlet 230, wherein the first oil inlet 210 is communicated with the first oil storage chamber 110, and the second oil inlet 220 is communicated with the second oil storage chamber 120. The control module can control the first switching valve 200 to switch the communication state, and the first switching valve 200 has two communication states, the first communication state is that the first oil inlet 210 is communicated with the first oil outlet 230, and the second communication state is that the second oil inlet 220 is communicated with the first oil outlet 230.

A change-over switch may be provided in the cab, and the change-over switch is connected to the control module, and the driver may operate the change-over switch to switch the communication state of the first change-over valve 200.

When the temperature of the oil in the first oil storage chamber 110 is lower than the preset temperature, the change-over switch can be switched to the first position, and at this time, the control module controls the second oil inlet 220 of the first change-over valve 200 to be communicated with the first oil outlet 230, and at this time, low-grade fuel oil is supplied to the oil supply pipeline of the engine. When the temperature of the oil in the first oil storage chamber 110 reaches a preset temperature, the change-over switch can be switched to the second position, and at this time, the control module controls the first oil inlet 210 of the first change-over valve 200 to be communicated with the first oil outlet 230, and at this time, high-grade fuel oil is supplied to the oil supply pipeline of the engine.

Further, the Control module may include an ECU310 (Electronic Control Unit, an Electronic Control Unit, also called a "traveling computer" or an "onboard computer") of the work machine and a temperature detection Unit, the temperature detection Unit may be a temperature sensor 320, and the temperature detection Unit and the first switching valve 200 are connected to the ECU 310.

When the work machine needs to be started in a low-temperature environment, the temperature sensor 320 detects the oil temperature in the first oil storage chamber 110, transmits the oil temperature information to the ECU310, and the ECU310 compares the received temperature value with a preset temperature. When the received temperature is lower than the preset temperature, it indicates that the high-grade fuel in the first oil storage chamber 110 is in an icing or waxing state, and the ECU310 controls the first switching valve 200 to communicate the second oil storage chamber 120 with the oil supply pipeline of the engine, and starts the working machine using the low-grade fuel in the second oil storage chamber 120.

After the operating machine is started, the heating device enters a working state and starts to heat the high-grade fuel oil in the first oil storage cavity 110, the temperature sensor 320 collects the oil temperature of the fuel oil in the first oil storage cavity 110 in real time, and when the oil temperature returned by the temperature sensor 320 and received by the ECU310 is higher than a preset temperature, the ECU310 controls the first switching to cut off the communication between the second oil storage cavity 120 and the oil supply pipeline of the engine, so that the first oil storage cavity 110 is communicated with the oil supply pipeline of the engine, and the high-grade fuel oil is supplied to the oil supply pipeline of the engine.

When the work machine stops working in a low-temperature environment, before the work machine stops working, a control signal can be sent to the ECU310 through the control system of the work machine, so that the ECU310 controls the first switching valve 200 to conduct the second oil storage chamber 120 and the oil supply pipeline of the engine, and after the work machine works for a period of time by using low-grade fuel oil, the work machine is stopped when the oil supply pipeline of the engine is filled with the low-grade fuel oil. Therefore, high-grade fuel oil can be prevented from being reserved in the fuel supply pipeline, and if the high-grade fuel oil is reserved in the fuel supply pipeline, the high-grade fuel oil can block the fuel supply pipeline after being frozen or waxed in a low-temperature environment, so that the operation machine cannot be restarted.

In addition, when the environmental temperature of the working machine is higher than the cold filter plugging point of the fuel in the first oil storage chamber 110, and when the working machine is started, the temperature value detected by the temperature sensor 320 received by the ECU310 is higher than the preset temperature, at this time, the ECU310 controls the first switching valve 200 to directly communicate the first oil storage chamber 110 with the oil supply pipeline of the engine, so that the working machine is started by using the high-grade fuel in the first oil storage chamber 110, and the working machine is not started by using the low-grade fuel.

In an embodiment of the present invention, in order to simplify the structure, the first oil storage chamber 110 and the second oil storage chamber 120 in the oil tank 100 share the oil filling port 150, the oil filling port 150 may be disposed at the top of the oil tank 100, and the oil filling port 150 communicates with the first oil storage chamber 110 and the second oil storage chamber 120.

Specifically, a first partition 130 may be disposed inside the fuel tank 100, a top of the first partition 130 is connected to the top of the fuel tank 100, a bottom of the first partition 130 is connected to the bottom of the fuel tank 100, a side of the first partition 130 is connected to a sidewall of the fuel tank 100, and the first partition 130 and the fuel tank 100 may be connected by welding. When the first partition 130 is connected to the tank 100, the first partition 130 partitions the internal space of the tank 100 into the first reservoir chamber 110 and the second reservoir chamber 120.

The above-mentioned oil filler 150 is provided on the top of the first partition 130, the oil filler 150 may be a circular port, the first partition 130 is located at a diameter position of the oil filler 150, a semicircle of one side of the oil filler 150 communicates with the first oil storage chamber 110, and a semicircle of the other side of the oil filler 150 communicates with the second oil storage chamber 120.

A second switching valve 400 is provided at the filler port 150, and the second switching valve 400 is selectively communicated with the first reservoir chamber 110 or the second reservoir chamber 120 to allow fuel to flow into the first reservoir chamber 110 or the second reservoir chamber 120 when fuel is filled.

Specifically, the second switching valve 400 described above may include a valve body 410 and a valve spool 420.

The valve body 410 may have a cylindrical structure, the bottom of the valve body 410 is welded to the fuel filler hole 150, the top of the valve body 410 is opened, and a fuel tank cap is provided on the top of the valve body 410.

The valve core 420 may be an oval baffle, a rotating shaft is disposed on the valve body 410, the rotating shaft penetrates through the valve body 410 at the bottom of the valve body 410 along the radial direction of the valve body 410, an operating handle 430 is disposed at one end of the rotating shaft, and the operating handle 430 is located outside the valve body 410. The straight edge of the flap is positioned below and is connected to the rotating shaft, and the flap can swing within the valve body 410 when the rotating shaft is driven to rotate by the operating handle 430.

When the flapper swings over the second reservoir chamber 120 and the edge of the flapper contacts the inside wall of the valve body 410, the flapper closes the portion of the filler port 150 over the second reservoir chamber 120 and the portion of the filler port 150 over the first reservoir chamber 110 is open, at which time the top of the valve body 410 is filled with fuel and the fuel flows into the first reservoir chamber 110 through the filler port 150.

When the flapper swings over the first reservoir chamber 110 and the edge of the flapper contacts the inside wall of the valve body 410, the flapper closes the portion of the filler port 150 above the first reservoir chamber 110 and the portion of the filler port 150 above the second reservoir chamber 120 is open, and at this time, fuel is filled into the top of the valve body 410 and flows into the second reservoir chamber 120 through the filler port 150.

In an embodiment of the present invention, the heating device may include a water tank 160, the water tank 160 is disposed inside or outside the oil tank 100, and the water tank 160 is communicated with the cooling water circulation line 510 of the engine.

For example, a second partition plate 140 may be provided at a position near the bottom inside the fuel tank 100, the second partition plate 140 being parallel to the bottom plate of the fuel tank 100, and an edge of the second partition plate 140 being welded to a sidewall of the fuel tank 100.

With respect to the position of the second reservoir chamber 120, the bottom of the first partition 130 may be connected to the bottom plate of the fuel tank 100 and the edge of the second partition 140 may be connected to the sidewall of the first partition 130, or the edge of the second partition 140 may be entirely connected to the inner sidewall of the fuel tank 100 and the bottom of the first partition 130 may be connected to the top of the second partition 140.

The second partition 140 is spaced apart from the bottom plate of the fuel tank 100, and after the connection, a cavity, which is a water tank 160, is formed between the second partition 140 and the bottom plate of the fuel tank 100.

A water inlet 161 may be provided at the bottom of the water tank 160 and a water outlet 162 may be provided at the outside of the oil tank 100 near the top of the water tank 160. The water inlet 161 is connected to the water outlet of the cooling water of the engine, the water inlet of the cooling water of the engine is connected to the radiator 520, and the water inlet of the radiator 520 is communicated with the water outlet 162 of the water tank 160.

After the working machine is started, the cooling water in the engine flows back to the engine through the water tank 160 and the radiator 520, and is continuously circulated. After the cooling water passes through the engine, the water temperature rises, and after the heated cooling water enters the water tank 160, the high-grade fuel oil in the first oil storage chamber 110 above the water tank 160 can be heated.

In a further embodiment, when the temperature of the high-grade fuel in first oil storage chamber 110 is higher than the preset temperature, the working machine starts to work by using the fuel in first oil storage chamber 110, the fuel in first oil storage chamber 110 is in a circulating flow state, and the fuel does not freeze and wax during the flow process, and at this time, the fuel in first oil storage chamber 110 does not need to be heated.

Therefore, in this embodiment, a bypass line 530 may be connected between the water inlet 161 and the water outlet 162 of the water tank 160, and a third switching valve 540 may be provided at a crossing point of the line connected to the outlet end of the cooling water of the engine, the bypass line 530, and the water inlet 161 of the water tank 160, and the third switching valve 540 may selectively communicate the outlet end of the cooling water of the engine with the water tank 160 or the bypass line 530.

When it is required to heat the fuel in the first oil storage chamber 110, the third switching valve 540 may be controlled to communicate the water outlet end of the cooling water of the engine with the water inlet 161 of the water tank 160, so that the cooling water flows through the water tank 160 and then flows back to the radiator 520. When it is not necessary to heat the fuel in the first reservoir 110, the third switching valve 540 may be controlled to communicate the water outlet end of the cooling water of the engine with the bypass line 530, so that the cooling water directly flows back to the radiator 520 without passing through the water tank 160.

Further, third switching valve 540 may be a solenoid directional valve, and third switching valve 540 may be connected to ECU 310. When the temperature value returned by the temperature sensor 320 collected by the ECU310 is lower than the preset temperature, the ECU310 controls the third switching valve 540 to communicate the water outlet end of the cooling water of the engine with the water inlet 161 of the water tank 160. When the temperature value returned by the temperature sensor 320 collected by the ECU310 is greater than the preset temperature, the ECU310 controls the third switching valve 540 to communicate the water outlet end of the cooling water of the engine with the bypass line 530.

Or, in another embodiment of the present invention, the heating device may also be an oil tank heater disposed in the first oil storage chamber 110, the oil tank heater may include an electric heating tube, the electric heating tube may use a metal tube as a housing, and a spiral electrothermal alloy wire (nickel-chromium or iron-chromium alloy) is axially and uniformly distributed along the center of the tube, and the gap of the electrothermal alloy wire is filled and compacted with magnesia sand having good insulating and heat conducting properties, and both ends of the tube are sealed with silica gel or ceramic. The electric heating alloy wire can be powered by a power supply system of the operation machine to generate heat, after the operation machine is powered on or started, the power supply system supplies power to the electric heating wire, the heat of the electric heating wire is transferred to the metal pipe shell through the magnesia filler, and the metal pipe shell heats fuel oil in the first oil storage cavity 110.

In an embodiment of the present invention, the liquid level meters 600 are disposed in the first oil storage chamber 110 and the second oil storage chamber 120, and the amount of oil in the first oil storage chamber 110 or the second oil storage chamber 120 can be observed through the liquid level meters 600.

Or the above-mentioned liquid level meter 600 may be a liquid level transmitter, the liquid level transmitter is connected with the ECU310, and a liquid level display device is arranged on an instrument in the cab, so that a driver can observe the oil amount in the first oil storage chamber 110 or the second oil storage chamber 120 at any time in the cab.

In addition, a liquid level thermometer 700 may be further disposed outside the fuel tank 100, a detection end of the liquid level thermometer 700 is located in the first fuel storage chamber 110, and a driver may observe the amount and temperature of fuel in the first fuel storage chamber 110 through the liquid level thermometer 700. Alternatively, the liquid level thermometer 700 may be connected to the ECU310, and a liquid temperature display device may be provided on an instrument in the cab, so that the driver can observe the temperature of the fuel in the first oil storage chamber 110 at any time in the cab.

In an embodiment of the present invention, the oil tank 100 is provided with an oil return port 170, and when the excessive fuel passing through the engine flows back into the oil tank 100 through the oil return port 170. The oil return port 170 may communicate only with the first oil reservoir chamber 110, and since the amount of oil returned is small, the high-grade fuel oil in the first oil reservoir chamber 110 or the low-grade fuel oil in the second oil reservoir chamber 120 may flow back into the first oil reservoir chamber 110.

Further, a pollution discharge device 800 may be disposed at the bottom of the oil tank 100, a second oil outlet 810 is disposed at the bottom of the pollution discharge device 800, the first oil outlet 230 of the first switching valve 200 is communicated with the inside of the pollution discharge device 800, and the fuel flows into an oil supply system of the engine through the second oil outlet 810 after passing through the first switching valve 200 and the pollution discharge device 800. The drainage device 800 is further provided with a drainage hole 820, and a water valve can be arranged on the drainage hole 820 and can be opened periodically to discharge impurities such as water in the fuel oil in the fuel tank 100.

The utility model also provides a working machine, working machine can but not only be limited to machinery such as excavator, hoist, owing to all be provided with as above oil feeding system, consequently have with as above the same advantage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil supply system, comprising:

the fuel tank (100) is internally provided with a first fuel storage cavity (110) and a second fuel storage cavity (120), and the grade of fuel stored in the first fuel storage cavity (110) is greater than that of fuel stored in the second fuel storage cavity (120);

a first switching valve (200), wherein the first switching valve (200) is arranged on the oil tank (100), and the first switching valve (200) is used for selectively communicating the first oil storage cavity (110) or the second oil storage cavity (120) with an oil supply pipeline of an engine;

the heating device is connected with the oil tank (100) and is used for heating fuel oil in the first oil storage cavity (110).

2. A fuel supply system as claimed in claim 1, further comprising a control module electrically connected to the first switching valve (200) and configured to detect an oil temperature in the first oil reservoir chamber (110);

when the oil temperature in first oil storage chamber (110) is less than when predetermineeing the temperature, control module control first change-over valve (200) intercommunication second oil storage chamber (120) with the engine supply oil pipe way, work as when the oil temperature in first oil storage chamber (110) reaches when predetermineeing the temperature, control module control first change-over valve (200) intercommunication first oil storage chamber (110) with the engine supply oil pipe way.

3. A fuel supply system as claimed in claim 2, characterized in that the control module comprises an ECU (310) and a temperature detection unit, the temperature detection unit and the first switching valve (200) both being electrically connected with the ECU (310).

4. A fuel supply system as claimed in claim 1, wherein a fuel filler opening (150) is provided in the fuel tank (100), a second switching valve (400) is provided at the fuel filler opening (150), the fuel filler opening (150) communicates with both the first reservoir chamber (110) and the second reservoir chamber (120), and the second switching valve (400) is used to selectively supply fuel into the first reservoir chamber (110) or the second reservoir chamber (120).

5. A oil supply system as claimed in claim 4, wherein the second switching valve (400) comprises:

the oil filling valve comprises a valve body (410), wherein one end of the valve body (410) is communicated with the oil filling port (150), and the other end of the valve body (410) is provided with a filling port;

the valve core (420) is rotatably arranged in the valve body (410), when the valve core (420) is located at a first position, the valve core (420) conducts the filling port and the first oil storage cavity (110), and when the valve core (420) is located at a second position, the valve core (420) conducts the filling port and the second oil storage cavity (120).

6. A fuel supply system as claimed in claim 3, wherein the heating means includes a water tank (160), the water tank (160) being disposed inside or outside the fuel tank (100), the water tank (160) being communicated with a cooling water circulation line (510) of the engine.

7. A fuel supply system as claimed in claim 6, wherein a bypass line (530) and a third switching valve (540) are further provided on the cooling water circulation line (510) of the engine, both ends of the bypass line (530) are respectively connected to a water inlet end and a water outlet end of the water tank (160), and the third switching valve (540) is connected to the ECU (310);

when the oil temperature in the first oil storage cavity (110) is lower than the preset temperature, the ECU (310) controls the third switching valve (540) to only conduct the water outlet end of the cooling water of the engine and the water inlet end of the water tank (160), and when the oil temperature in the first oil storage cavity (110) reaches the preset temperature, the ECU (310) controls the third switching valve (540) to only conduct the water outlet end of the cooling water of the engine and the water inlet end of the bypass pipeline (530).

8. A fuel supply system as claimed in claim 1, wherein a level gauge (600) is provided in each of the first and second fuel storage chambers (110, 120).

9. The oil supply system as claimed in claim 1, wherein a blowdown device (800) is provided at a bottom of the oil tank (100), the blowdown device (800) is communicated with an oil outlet end of the first switching valve (200), and a second oil outlet (810) and a water discharge port (820) are further provided on the blowdown device (800).

10. A working machine, characterized by comprising an oil supply system according to any one of claims 1 to 9.