Common rail high pressure pump
A high-pressure pump and common-rail technology, which is applied in the field of common-rail high-pressure pumps, can solve problems such as high-pressure pump failure, impracticality, high-wear friction parts of high-pressure pumps, etc.
Inactive Publication Date: 2011-11-09
飞乐特飞机发动机有限公司
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
However, due to the low lubricity of aviation fuel and the resulting high wear of high pressure pump friction parts, it is not practical to use the existing common rail principle high pressure pump diesel engine driven by aviation kerosene fuel in aircraft
Operation of diesel engines powered by aviation fuel according to the common rail principle will lead to complete failure of the high pressure pump even for a short period of time
Method used
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Embodiment Construction
[0014] figure 1 A partial view showing the power transmission area from the eccentric shaft 1 via the polygonal eccentric ring 2 to the tappet plate 3 in a high-pressure pump. The tappet plate 3 moves radially outward and inward alternately with the eccentric rotational movement of the eccentric shaft 1 . During this process, the eccentric ring 2 (see figure 2 ) running surface 4 moves back and forth along the contact surface 5 of the tappet plate 3 . One end of the pump piston 8 that can move radially forward and backward in the pump cylinder 7 is arranged on the tappet plate 3 (see image 3 ) in the receiving hole 6. The end surface 9 of the pump piston 8 is in contact with the support surface 10 in the receiving hole 6, so that the pump piston 8 moves radially outward against the force of the helical compression spring 11, and then moves inward with the elastic force of the spring. like figure 2 As shown, the eccentric ring 2 has three running surfaces 4 arranged at ...
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Abstract
In a common rail high pressure pump for diesel engines operated using aircraft fuel, said pump comprising an eccentric ring (2) that is disposed in a pump housing (13), is shaped in the form of a polygon and is driven by an eccentric shaft (1), and comprising pump pistons (8) that can move over the riding surfaces (4) of said eccentric ring and over the contact surface (5) of a tappet plate (3) in the pump cylinders (7) and that is in operative connection with a seating surface (10) of the tappet plate, a thin diamond-like carbon layer (12) is applied onto the previously ground contact surfaces (5) and riding surfaces (4), whereas the uncoated seating surface (10) is designed as a concave bulge. The eccentric ring (2) and the tappet plate (3) comprise a pre-determined high degree of hardness. Due to the synergistic effects caused by the material hardness and coating and the concave seating surface, the frictional forces are reduced by many times, and the life of the high pressure pump which operates on aircraft fuel is increased by many times.
Description
technical field [0001] The invention relates to a common rail diesel engine high-pressure pump driven by aviation fuel. The high-pressure pump includes an eccentric ring and a pump piston. The eccentric ring is arranged in a pump housing, is polygonal, and is driven by an eccentric shaft. The pump The piston is movable in the pump cylinder via the running surface of the eccentric ring and the contact surface of the tappet plate, and the pump piston is connected to the support surface of the tappet plate during operation. Background technique [0002] In fuel diesel engines based on the common rail working principle, a high pressure pump is used to keep the fuel in the common distribution pipe (rail), keeping the fuel at the proper pressure ready for injection into the combustion chamber. A known common-rail diesel engine high-pressure pump driven by diesel fuel comprises an eccentric ring, which is triangular polygonal and driven by the diesel engine via an eccentric shaft, ...
Claims
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IPC IPC(8): F04B1/04F04B9/04F02M59/10F02M63/02
CPCF04B9/045F02M63/0265F04B1/0426F04B1/0413F02M2200/9038F05C2203/0808F02M2200/9061F05C2253/12F02M2200/9092F02M59/102F05C2251/10F02M59/445
Inventor 卡斯腾・入多鲁夫
Owner 飞乐特飞机发动机有限公司