Oil supply system of engineering machinery diesel engine

Abstract

The utility model discloses an engineering machinery diesel engine oil supply system which comprises a fuel tank, a first oil supply pipe, a second oil supply pipe, a third oil supply pipe, an electromagnetic valve, a first oil suction pipe, a second oil suction pipe and a liquid level sensor. The first oil suction pipe and the second oil suction pipe are installed at the two ends in the fuel tank respectively, the liquid level sensor is installed at one end in the fuel tank, one end of the first oil supply pipe and one end of the second oil supply pipe are communicated with the first oil suction pipe and the second oil suction pipe respectively, and the other end of the first oil supply pipe and the other end of the second oil supply pipe are communicated with two inlet channels of the electromagnetic valve respectively. One end of the third oil supply pipe is communicated with an outlet channel of the electromagnetic valve, and the other end of the third oil supply pipe supplies oil to a diesel engine power system. According to the utility model, the stability and the flexibility of oil supply are improved, the safety and the fuel oil utilization rate of the system are enhanced, and the problem that the engine flames out due to unsmooth fuel oil supply even if the fuel oil liquid level is very low when the engineering machinery performs large-angle uphill and downhill construction operation is well solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery power control system technical field especially relates to a kind of engineering machinery diesel engine oil supply system. BACKGROUND

[0002] The mechanical equipment necessary for comprehensive mechanized construction engineering required by earthwork construction engineering, pavement construction and maintenance, mobile hoisting and unloading operation and various building engineering is called engineering machinery. It is mainly used in national defense construction engineering, transportation construction, energy industry construction and production, raw material industry construction and production such as mine, agricultural and water conservancy construction, industrial and civil building, city construction, environmental protection and other fields.

[0003] Engineering machinery, as an important component of equipment industry, plays an irreplaceable role in various fields. With the continuous progress of technology and the continuous expansion of market, engineering machinery industry will usher in a broader development prospect.

[0004] Engineering machinery such as drilling machine, excavator and other engineering machinery needs large capacity diesel tank to meet the requirement of long time work when designing fuel tank, and the fuel tank is designed to be flat to consider the overall design layout. When the whole machine is working on uphill and downhill, especially on large angle uphill and downhill, the diesel engine may be out of fuel supply due to the inclination of fuel level, which may cause engine stall (especially when the oil level is low), and bring certain safety hazard to construction work. UTILITY MODEL CONTENTS

[0005] The utility model aims at making up for the defects of prior art, and provides an engineering machinery diesel engine oil supply system to solve the problem that engine stall may occur due to insufficient fuel supply even when the fuel level is low during construction work on large angle uphill and downhill.

[0006] The utility model is realized by the following technical solutions:

[0007] An engineering machinery diesel engine oil supply system comprises a fuel tank, a first oil supply pipe, a second oil supply pipe, a third oil supply pipe, an electromagnetic valve, a first oil suction pipe and a second oil suction pipe and a liquid level sensor. The first and second oil suction pipes are respectively installed at two ends inside the fuel tank, the liquid level sensor is installed at one end inside the fuel tank, one end of the first and second oil supply pipes is respectively communicated with the first and second oil suction pipes, the other end of the first and second oil supply pipes is respectively communicated with two inlet channels of the electromagnetic valve, one end of the third oil supply pipe is communicated with the outlet channel of the electromagnetic valve, and the other end of the third oil supply pipe supplies oil to the diesel engine power system.

[0008] The first and second oil suction pipes are respectively arranged according to the front and rear inclination directions of the fuel tank.

[0009] The liquid level sensor is installed at the inner front end of the fuel tank.

[0010] The liquid level sensor sets an alarm point when the liquid level is 70mm from the bottom of the fuel tank.

[0011] The electromagnetic valve adopts a 24V two-input one-output two-position three-way electromagnetic valve.

[0012] A control module is further included, which is electrically connected with the electromagnetic valve and the liquid level sensor respectively.

[0013] The utility model discloses a fuel supply:

[0014] The fuel tank stores diesel oil as the oil source of the whole fuel supply system.

[0015] The oil suction pipe one and the oil suction pipe two are installed at the two ends in the fuel tank respectively, so that fuel can be effectively sucked under different liquid levels.

[0016] The utility model discloses an electromagnetic valve control:

[0017] The oil supply pipe one and the oil supply pipe two are communicated with the oil suction pipe one and the oil suction pipe two respectively, and the sucked fuel is transported to the electromagnetic valve.

[0018] The electromagnetic valve is used as a control element, and adjusts the fuel supply according to the demand of the diesel engine power system.

[0019] The utility model discloses a fuel distribution:

[0020] The oil supply pipe three is communicated with the outlet channel of the electromagnetic valve, and the fuel adjusted by the electromagnetic valve is transported to the diesel engine power system. The diesel engine power system carries out combustion work according to the received fuel.

[0021] Liquid level monitoring:

[0022] The liquid level sensor is installed at one end in the fuel tank and monitors the liquid level of the fuel tank in real time.

[0023] When the front liquid level is too low, the liquid level sensor will send an alarm signal.

[0024] The working principle of the fuel liquid level sensor is as follows: the magnetic float rises and falls with the fuel liquid level, drives the sliding resistance or the potentiometer to change the resistance value, outputs the electric signal corresponding to the liquid level, and then displays the fuel liquid level percentage. When the magnetic float reaches 70mm from the bottom of the oil tank along with the liquid level, the alarm switch is triggered (the switch is closed, and the electric signal is given).

[0025] The working principle of the electromagnetic valve is as follows: driven by electromagnetic force, the electromagnetic valve controls the switch of the fluid channel. The control logic of the utility model electromagnetic valve is as follows: when the coil is not electrified, the fuel passes through the inlet channel one to the outlet channel. When the coil is electrified, the inlet channel two passes through the outlet channel.

[0026] The utility model has the advantages that:

[0027] 1. Improve oil supply stability:

[0028] The utility model discloses a fuel tank, oil suction pipe one and oil suction pipe two are installed at both ends in the fuel tank respectively, can effectively suck fuel under different inclination angles and oil levels, improve the stability of oil supply, can solve the problem of poor oil supply caused by fuel surface inclination when working on the uphill and downhill.

[0029] 2. Enhance system flexibility:

[0030] The utility model discloses the opening and closing of solenoid valve can realize the accurate control to the fuel supply, satisfies the demand under different working conditions.

[0031] 3. Improve fuel utilization rate:

[0032] The utility model discloses the oil supply system of optimization helps to ensure that the diesel engine power system obtains stable, sufficient fuel supply all the time, this helps to improve the utilization rate of fuel, reduces fuel waste, reduces operating cost.

[0033] 4. The utility model discloses reasonable structure design and advanced control element improve the stability and flexibility of oil supply, enhance the safety and fuel utilization rate of system, and very good solution engineering machinery when the large angle uphill and downhill construction operation even if fuel level is very low also can not cause engine flameout because of fuel supply not smooth the problem of engine. DRAWINGS

[0034] Figure 1 It is the structure schematic drawing of the utility model;

[0035] Figure 2 It is state one fuel tank state diagram in the utility model embodiment;

[0036] Figure 3 It is state two fuel tank state diagram in the utility model embodiment;

[0037] Figure 4 It is state three fuel tank state diagram in the utility model embodiment. CONCRETE IMPLEMENTING METHOD

[0038] As Figure 1As shown, a diesel engine fuel supply system for engineering machinery includes a fuel tank 1, a first fuel supply pipe 2, a second fuel supply pipe 3, a third fuel supply pipe 4, a solenoid valve 5, a first suction pipe 6, a second suction pipe 7, and a level sensor 8. The first and second suction pipes 6 and 7 are respectively installed at both ends inside the fuel tank 1. The level sensor 8 is installed at one end inside the fuel tank 1. One end of the first and second fuel supply pipes 2 and 3 are respectively connected to the first and second suction pipes 6 and 7, respectively. The other end of the first and second fuel supply pipes 2 and 3 are respectively connected to the two inlet channels of the solenoid valve 5. One end of the third fuel supply pipe 4 is connected to the outlet channel of the solenoid valve 5, and the other end of the third fuel supply pipe 4 supplies fuel to the diesel engine power system.

[0039] The first oil suction pipe 6 and the second oil suction pipe 7 are arranged in the forward and backward directions of the fuel tank 1, respectively.

[0040] The liquid level sensor 8 is installed inside the front end of the fuel tank 1.

[0041] The liquid level sensor 8 has an alarm point set at a liquid level 70mm from the bottom of the fuel tank 1, which can trigger a control signal.

[0042] The solenoid valve 5 is a 24V two-input, one-output two-position three-way solenoid valve.

[0043] It also includes a control module, which is electrically connected to the solenoid valve 5 and the liquid level sensor 8 respectively.

[0044] The specific work process is as follows:

[0045] 1. For example Figure 2 As shown, when the machine is traveling horizontally (state one), the fuel level in fuel tank 1 is horizontal. Solenoid valve 5 is de-energized, and fuel is supplied by suction pipe 6. Fuel flows through fuel supply pipe 2, through inlet channel 51 of solenoid valve 5 to outlet channel 53, and then is supplied to the diesel engine.

[0046] 2. For example Figure 3 As shown, when the machine is operating downhill (state two), that is, when the fuel tank 1 is tilted forward, the solenoid valve 5 is de-energized, and fuel is supplied by the fuel suction pipe 6. The fuel flows through the fuel supply pipe 2, through the inlet channel 51 of the solenoid valve 5 to the outlet channel 53, and then is supplied to the diesel engine.

[0047] 3. For example Figure 4As shown, when the whole machine is working on an uphill (state three), i.e. the fuel tank 1 is in a state of backward tilting of fuel liquid level, when the liquid level reaches the alarm point of the liquid level sensor 8 (the magnetic float reaches 70mm from the bottom of the fuel tank along with the liquid level), the electromagnetic valve 5 coil is triggered to be electrified, the inlet passage two 52 to the outlet passage 53 of the electromagnetic valve 5 is in a pass-through state, and the fuel is supplied from the oil suction pipe two 7. The fuel flows through the electromagnetic valve 5 from the inlet passage two 52 to the outlet passage 53 of the fuel supply pipe two 3 to supply the diesel engine.

[0048] 4、After the whole machine finishes working on an uphill, i.e. from state three to state one slowly, the liquid level gradually becomes horizontal, when the liquid level exceeds the alarm point of the liquid level sensor 8, the liquid level alarm is released at this time, the low liquid level alarm switch is turned off, the electromagnetic coil becomes a de-energized state, the inlet passage one 51 to the outlet passage 53 of the electromagnetic valve 5 is in a pass-through state. The fuel supply mode of the diesel engine is the same as that in state one.

Claims

1. An engine fuel supply system for a construction machine, characterized by: It comprises a fuel tank, a first fuel supply pipe, a second fuel supply pipe, a third fuel supply pipe, an electromagnetic valve, a first oil suction pipe, a second oil suction pipe and a liquid level sensor; the first and second oil suction pipes are respectively installed at two ends inside the fuel tank, the liquid level sensor is installed at one end inside the fuel tank, one end of the first and second fuel supply pipes respectively communicates with the first and second oil suction pipes, the other end of the first and second fuel supply pipes respectively communicates with two inlet channels of the electromagnetic valve, one end of the third fuel supply pipe communicates with an outlet channel of the electromagnetic valve, and the other end of the third fuel supply pipe supplies oil to a diesel engine power system.

2. An engine fuel supply system for a construction machine according to claim 1, characterized in that: The first and second oil suction pipes are respectively arranged according to the front and rear inclination directions of the fuel tank.

3. An engine fuel supply system for a construction machine according to claim 2, characterized in that: The liquid level sensor is installed at the front end inside the fuel tank.

4. An engine fuel supply system for a construction machine according to claim 1, characterized in that: The liquid level sensor sets an alarm point at 70mm from the bottom of the fuel tank.

5. An engine fuel supply system for a construction machine according to claim 1, characterized by: The electromagnetic valve is a 24V two-input one-output two-position three-way electromagnetic valve.

6. An engine fuel supply system for a construction machine according to claim 1, characterized by: It further comprises a control module, and the control module is electrically connected with the electromagnetic valve and the liquid level sensor.

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