Diesel engine for mine car

Abstract

The utility model relates to the technical field of diesel engines, and discloses a diesel engine for a mine car, which comprises an engine body, a bipolar engine oil pump, a tensioning wheel, an ECU (electronic control unit) and a starter, the bipolar engine oil pump is mounted in an oil pan on the bottom surface of the engine body, the tensioning wheel is mounted on the front end surface of the engine body, and the starter is mounted on a flywheel casing at the rear end of the engine body. The ECU is installed on the side face of an engine body through an ECU support, the bipolar engine oil pump comprises an oil conveying port and oil suction ports, the oil conveying port is connected with a main engine oil channel in the engine body, and the oil suction ports comprise the front end oil suction port located at the front end of an oil pan and the rear end oil suction port located at the rear end of the oil pan. According to the utility model, the structure of the engine body is optimally designed, the reliability of the engine body is improved, the fuel oil is subjected to three-stage filtration, and the requirement of the mining dump truck on the high reliability of the engine is well met.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engines, in particular to a diesel engine for a mining vehicle. Background Art

[0002] Large mining dump trucks travel on complex roads with poor road conditions and a harsh working environment. They also have high equipment utilization rates and high requirements for engine reliability. The current 10-12L engines are not satisfactory in terms of reliability.

[0003] Therefore, designing a highly reliable diesel engine is an important topic with great technical potential. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing mining dump trucks travel on complex roads, poor road conditions and harsh working environment, which leads to low reliability of the engine.

[0005] In order to solve the above technical problems, the technical solution of the utility model is to provide a diesel engine for a mining car, including an engine body, a fuel system and a fuel tank, the fuel tank and the engine body are connected to the fuel system, and also include a bipolar oil pump, a tensioner, an ECU and a starter. The bipolar oil pump is installed in an oil pan on the bottom of the engine body, the tensioner is installed on the front end surface of the engine body, the starter is installed on the flywheel housing at the rear end of the engine body, the ECU is installed on the side of the engine body through an ECU bracket, a three-stage fuel filter is provided between the fuel system inlet and the fuel tank, the bipolar oil pump includes an oil delivery port and an oil suction port, the oil delivery port is connected to the main oil channel in the engine body, and the oil suction port includes a front oil suction port located at the front end of the oil pan and a rear oil suction port located at the rear end of the oil pan.

[0006] Optionally, a sealing cover is provided on the tensioning wheel, the sealing cover is a labyrinth structure, and a sealing ring is provided between the sealing cover and the tensioning wheel.

[0007] Optionally, a rubber shock-absorbing pad is provided at the connection between the ECU bracket and the engine body.

[0008] Optionally, a mounting stop is provided at the connection between the starter and the flywheel housing, and an O-ring is provided in the mounting stop.

[0009] Optionally, the three-stage fuel filter includes a first-stage filter, a second-stage filter and a third-stage filter, wherein the first-stage filter, the second-stage filter and the third-stage filter are sequentially connected between the fuel system and the fuel tank, and the first-stage filter is close to the fuel tank, and an oil pump is provided between the second-stage filter and the third-stage filter.

[0010] Optionally, the engine body includes a cylinder block, a cylinder head and a cylinder liner. The cylinder block is made of vermicular cast iron and adopts a frame structure. The cylinder head is an integral cylinder head made of vermicular cast iron, and the cylinder liner structure is a wet cylinder liner.

[0011] In summary, the utility model has at least one of the following beneficial effects:

[0012] 1. The utility model has an oil suction port at the front and rear ends of the oil pan. When the vehicle climbs a slope, the oil flows to the rear end, and the oil suction port at the rear end sucks out the oil and continuously transports it to the front end, thereby avoiding the front end oil suction port from sucking out the oil, increasing the allowable longitudinal tilt angle of the engine, improving the lubrication of the engine when the vehicle climbs a steep slope, and meeting the use requirements of the engine on complex roads in mining areas.

[0013] 2. The utility model provides a rubber vibration-damping pad on the ECU bracket to reduce the vibration of the ECU, and adds an O-ring at the starter installation stop to improve the reliability of the starter and the ECU.

[0014] 3. The utility model arranges a labyrinth structure on the tension wheel and adds a sealing ring, thereby improving the sealing effect of the tension wheel sealing cover, effectively preventing dust from entering the tension wheel and causing damage to the tension wheel, and improving the reliability of the tension wheel.

[0015] 4. The utility model develops a three-stage fuel filter, which can effectively reduce the content of particulate matter in irregular fuel, meet the use requirements of fuel system parts, and ensure the normal service life of the fuel system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model diesel engine for mining vehicles;

[0017] Figure 2 This is a schematic diagram of the side view of the diesel engine for mining vehicles of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the oil pan of a diesel engine for a mining vehicle of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the diesel engine ECU bracket for a mining vehicle of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the sealing cover of the tensioning wheel of a diesel engine for a mining vehicle of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of a diesel engine starter for a mining vehicle of the utility model;

[0022] Figure 7 This is a schematic diagram of a three-stage fuel filter for a diesel engine used in a mining vehicle of the utility model;

[0023] In the figure: 1. Engine body; 2. Two-stage oil pump; 21. Oil delivery port; 22. Front oil suction port; 23. Rear oil suction port; 3. Tensioner; 31. Sealing cover; 32. Sealing ring; 4. ECU bracket; 41. Rubber shock-absorbing pad; 5. Starter; 51. Mounting stop; 52. O-ring; 6. Oil pan; 7. Fuel system; 8. Fuel tank; 9. Three-stage fuel filter; 91. First-stage filtration; 92. Second-stage filtration; 93. Third-stage filtration; 94. Oil delivery pump. DETAILED DESCRIPTION

[0024] The following combination Figure 1-7 The utility model is described in further detail.

[0025] The utility model discloses a diesel engine for a mine car, referring to Figure 1 and Figure 2 , including an engine body 1, a fuel system 7 and a fuel tank 8, the fuel tank 8 and the engine body 1 are connected to the fuel system 7, and also include a bipolar oil pump 2, a tensioner 3, an ECU and a starter 5, the bipolar oil pump 2 is installed in an oil pan 6 on the bottom surface of the engine body 1, the tensioner 3 is installed on the front end surface of the engine body 1, the starter is installed on the flywheel housing at the rear end of the engine body 1, the ECU is installed on the side of the engine body 1 through the ECU bracket 4, and a three-stage fuel filter 9 is provided between the inlet of the fuel system 7 and the fuel tank 8.

[0026] In a further embodiment, referring to Figure 3 The bipolar oil pump 2 includes an oil delivery port 21 and an oil suction port. The oil delivery port 21 is connected to the main oil channel in the engine body 1. The oil suction port includes a front oil suction port 22 located at the front end of the oil pan 6 and a rear oil suction port 23 located at the rear end of the oil pan 6. When the engine body 1 is running, the oil in the oil pan 6 is sucked and delivered to the main oil channel at a certain pressure to provide reliable lubrication for the engine moving parts. When the vehicle climbs a slope, the oil flows to the rear end, and the rear end oil suction port 23 will suck out the oil and continuously deliver it to the front end, avoiding the front end oil suction port 22 from sucking empty, increasing the allowable longitudinal tilt angle of the engine body 1, and improving the lubrication condition of the engine when the vehicle climbs a steep slope, so that the allowable climbing gradient of the engine body 1 is increased from 22° to 32°, meeting the use requirements of the engine on complex roads in mining areas.

[0027] In a further embodiment, referring to Figure 5A sealing cover 31 is provided on the tension wheel 3. The sealing cover 31 is a labyrinth structure, and a sealing ring 32 is provided between the sealing cover 31 and the tension wheel 3. The tension wheel 3 provides automatic tensioning force for the belt of the front wheel system, so that accessories such as the water pump, fan, generator and air-conditioning compressor can obtain reliable driving force. The labyrinth structure and the sealing ring 32 can improve the sealing effect of the sealing cover 31, and can effectively prevent dust from entering the tension wheel 3 and causing damage to the tension wheel 3, thereby improving the reliability of the tension wheel 3.

[0028] In a further embodiment, referring to Figure 4 A rubber shock-absorbing pad 41 is provided at the connection between the ECU bracket 4 and the engine body 1. The ECU is used to control the operation of the engine body 1. The rubber shock-absorbing pad 41 can reduce the vibration of the ECU and improve the reliability of the ECU.

[0029] In a further embodiment, referring to Figure 6 A mounting stop 51 is provided at the connection between the starter 5 and the flywheel housing, and an O-ring 52 is provided in the mounting stop 51. The starter 5 provides driving force for the engine when starting. The setting of the O-ring 52 can prevent dust and water from entering the starter 5 and causing damage to the starter 5, thereby improving the reliability of the starter 5.

[0030] In a further embodiment, referring to Figure 7 The three-stage fuel filter 9 includes a first-stage filter 91, a second-stage filter 92 and a third-stage filter 93. The first-stage filter 91, the second-stage filter 92 and the third-stage filter 93 are connected between the fuel system 7 and the fuel tank 8 in sequence, and the first-stage filter 91 is close to the fuel tank 8. An oil pump 94 is arranged between the second-stage filter 92 and the third-stage filter 93. The outlet of the fuel system 7 is connected with the fuel tank 8, so as to avoid irregular oil use by mining card users, effectively reduce the particulate matter content in irregular fuel, meet the use requirements of fuel system parts, and ensure the normal service life of the fuel system.

[0031] Example

[0032] In this embodiment, the engine body 1 is a diesel engine with a displacement of 12.82 liters, including a cylinder block, a cylinder head and 6 cylinders in the cylinder block. The 6 cylinders are arranged in line, and the diameter of the cylinder is D=130 mm, and the piston stroke is S=161 mm; the total displacement Vh=12.82 liters, the cylinder block is made of vermicular graphite cast iron, and adopts a frame structure, the cylinder head is an integral cylinder head, the material is vermicular graphite cast iron, the cylinder liner structure is a wet cylinder liner, and the number of valves per cylinder is 12.82 liters. The engine intake mode is supercharged air-to-air intercooling intake; the oil supply system is an electronically controlled high-pressure common rail; the piston ring is a low-elasticity piston ring with a diamond-like coating (DLC), and a centrifugal bypass oil filter is adopted;

[0033] The first-stage filter 91 of the three-stage fuel filter 9 uses an electric pump for coarse filtration and water separation, which can filter 30-micron particles, with a 30-micron particle filtration efficiency of 98% and a water separation efficiency of 95%; the second-stage filter 92 performs further 10-micron particle coarse filtration and water separation, with a 10-micron particle filtration efficiency of 98% and a water separation efficiency of 95%; the third-stage filter 93 performs 5-micron particle fine filtration, with a filtration efficiency of 98%.

[0034] The utility model optimizes the structure of the engine body 1, improves the reliability of the engine body 1, and performs three-stage filtration on the fuel, thus well meeting the requirement of the mining dump truck for high reliability of the engine.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A diesel engine for a mining vehicle, comprising an engine body (1), a fuel system (7) and a fuel tank (8), wherein the fuel tank (8) and the engine body (1) are both connected to the fuel system (7), characterized in that: The invention also comprises a bipolar oil pump (2), a tension wheel (3), an ECU and a starter (5), wherein the bipolar oil pump (2) is mounted in an oil pan (6) on the bottom surface of an engine body (1), the tension wheel (3) is mounted on the front end surface of the engine body (1), the starter is mounted on a flywheel housing at the rear end of the engine body (1), the ECU is mounted on the side of the engine body (1) via an ECU bracket (4), a three-stage fuel filter (9) is provided between the inlet of the fuel system (7) and the fuel tank (8), the bipolar oil pump (2) comprises an oil delivery port (21) and an oil suction port, the oil delivery port (21) is connected to the main engine oil passage in the engine body (1), and the oil suction port comprises a front oil suction port (22) located at the front end of the oil pan (6) and a rear oil suction port (23) located at the rear end of the oil pan (6).

2. The diesel engine for a mining vehicle according to claim 1, characterized in that: The tension wheel (3) is provided with a sealing cover (31), the sealing cover (31) is a labyrinth structure, and a sealing ring (32) is provided between the sealing cover (31) and the tension wheel (3).

3. The diesel engine for mining vehicles according to claim 1, characterized in that: A rubber shock-absorbing pad (41) is provided at the connection between the ECU bracket (4) and the engine body (1).

4. The diesel engine for mining vehicles according to claim 1, characterized in that: A mounting stop (51) is provided at the connection between the starter (5) and the flywheel housing, and an O-type sealing ring (52) is provided in the mounting stop (51).

5. The diesel engine for mining vehicles according to claim 1, characterized in that: The three-stage fuel filter (9) comprises a first-stage filter (91), a second-stage filter (92) and a third-stage filter (93); the first-stage filter (91), the second-stage filter (92) and the third-stage filter (93) are sequentially connected between the fuel system (7) and the fuel tank (8); the first-stage filter (91) is close to the fuel tank (8); and an oil delivery pump (94) is provided between the second-stage filter (92) and the third-stage filter (93).

6. The diesel engine for mining vehicles according to claim 1, characterized in that: The engine body (1) comprises a cylinder block, a cylinder head and a cylinder liner. The cylinder block is made of vermicular cast iron and adopts a frame structure. The cylinder head is an integral cylinder head made of vermicular cast iron. The cylinder liner structure is a wet cylinder liner.

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