A double layer common rail pipe
A common rail tube, double-layer technology, applied in charging systems, fuel injection devices, machines/engines, etc., can solve problems such as high cost, unsuitable serialization, leakage of installation blocks, etc., and achieve low cost and flexible layout. , the effect of fewer types of parts
Active Publication Date: 2022-04-22
WUXI WEIFU HIGH TECH CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
[0006] Disadvantages of solution (1): the high-pressure joint is not directly connected and fixed to the inner rail, and there is a risk of high-pressure leakage after the mounting block is hit
[0007] Disadvantages of solution (2): For different engines and different inner rails, the protective cover needs to be molded separately, which is expensive and not suitable for serialization
Method used
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Embodiment Construction
[0019] The present invention will be further described below in conjunction with specific drawings.
[0020] like figure 1 As shown, a double-layer common rail pipe includes an inner rail 1, a high-pressure joint 2, an outer pipe 3, a screw sleeve 6 and a plug 7, the inner rail 1 is sleeved with an outer pipe 3, and the inner rail 1 Both ends are equipped with plugs 7, the two ends of the outer tube 3 are equipped with screw sleeves 6, several high-pressure joints 2 arranged at intervals pass through the outer tube 3 and are screwed to the inner rail 1, and the outer tube 3 is realized through the high-pressure joint 2 The axial positioning of the outer tube 3 and the inner rail 1; the screw sleeve 6 is provided with a step portion 10 for supporting the inner rail 1, and the outer tube 3 realizes the radial alignment between the outer tube 3 and the inner rail 1 through the screw sleeve 6 Positioning; the screw sleeve 6 is provided with an oil drain port 9, and the matching s...
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The invention relates to a double-layer common rail pipe, which includes an inner rail, a high-pressure joint, an outer pipe, a screw sleeve and a plug. The two ends of the outer tube are fitted with screw sleeves, and several high-pressure joints arranged at intervals pass through the outer tube and are screwed to the inner rail. The outer tube realizes the axial positioning of the outer tube and the inner rail through the high-pressure joints; There is a stepped portion for supporting the inner rail, and the outer tube realizes the radial positioning of the outer tube and the inner rail through a screw sleeve. The invention has a simple, compact and reasonable structure, can be arranged flexibly, the inner rail and the high-pressure joint are directly connected and fixed, and the risk of high-pressure leakage is low.
Description
technical field [0001] The invention relates to a double-layer common rail pipe, belonging to the technical field of high-pressure common rail systems for marine diesel engines. Background technique [0002] In the high-pressure common rail system of marine diesel engines, in order to prevent cracking of the high-pressure common rail pipe and leakage of the high-pressure seal, the following two solutions are generally adopted in the prior art: [0003] (1) An outer pipe is added to the outside of the single-layer common rail pipe, the inner rail and the outer pipe are fixed on the mounting block, and the high-pressure joint is pressed onto the inner rail through the thread on the mounting block to realize high-pressure sealing; [0004] (2) A protective cover is added to the outside of the single-layer common rail pipe; [0005] But the above two technical solutions have the following problems: [0006] Disadvantages of solution (1): the high-pressure joint is not directly...
Claims
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IPC IPC(8): F02M55/02F02M55/00
CPCF02M55/025F02M55/005
Inventor 周俞栋徐云峰封树文王亚伟
Owner WUXI WEIFU HIGH TECH CO LTD