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End face sealing structure of Roots hydrogen circulation pump used for fuel cell

An end face sealing and fuel cell technology, which is applied to the components of the pumping device for elastic fluid, the sealing device of the piston pump, the liquid fuel engine, etc. Internal gas leakage and other problems, to achieve the effect of simple structure, improved sealing, and reduced processing requirements

Inactive Publication Date: 2019-02-12
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gap caused the leakage of gas inside the machine, resulting in the reduction of the volumetric efficiency of the Roots pump, difficulty in increasing the pressure and large power loss

Method used

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  • End face sealing structure of Roots hydrogen circulation pump used for fuel cell
  • End face sealing structure of Roots hydrogen circulation pump used for fuel cell
  • End face sealing structure of Roots hydrogen circulation pump used for fuel cell

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0029] see figure 1 and figure 2 , the Roots hydrogen circulating pump of the present invention adopts a three-lobe rotor, and the driving rotor and the driven rotor cooperate to rotate so as to realize the delivery of hydrogen.

[0030] refer to figure 2 and image 3 Each blade of the rotor 4 is provided with trapezoidal grooves distributed along its radial direction on both sides. The trapezoidal grooves are tapered grooves along its four side walls, and the shape of the sealing strip corresponds to the shape of the trapezoidal grooves. The trapezoidal grooves are arranged on the line connecting each blade of the rotor along the shaft center to the apex of the blades, and the trape...

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Abstract

The invention discloses an end face sealing structure of a Roots hydrogen circulation pump used for a fuel cell. The end face sealing structure comprises trapezoidal grooves which are formed in the end faces of blades of a circulation pump rotor and are distributed in the radial direction of the blades. Small holes used for containing springs are formed in the bottom faces of the trapezoidal grooves. Sealing strips are installed in the trapezoidal grooves and can rotate in the trapezoidal grooves in the axial direction of the rotor. After the upper surface of the rotor is covered with an air cylinder end face cover plate, under the effect of spring force, the top faces of the sealing strips make contact with the air cylinder end face cover plate tightly, and end face sealing of the Roots hydrogen circulation pump is achieved. The structure does not rely on the machining precision guarantee of the rotor and a machine shell any more, and the machining requirements of parts are lowered; and inner leakage of the Roots hydrogen circulation pump is reduced, and the volume efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of Roots pumps for fuel cells, and relates to an end face sealing structure of a Roots hydrogen circulation pump. Background technique [0002] Due to its high efficiency and near-zero emissions, fuel cell vehicles (FCV) are generally considered to be the most likely to replace the current traditional fuel vehicles in the future, and have broad development prospects. As an important part of the fuel cell system, the hydrogen circulation pump has an important impact on the performance of the fuel cell. The Roots pump has the advantages of simple structure, wide adjustment range, oil-free compression, and has the advantages of small size, light weight, low cost, etc. Advantages, can meet the requirements of new energy vehicles. [0003] Roots blowers and Roots pumps are widely used in various industries. At present, a clearance fit has been maintained between the end face of the impeller and the end face of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/12F04C27/00F04C29/00
CPCF04C18/126F04C18/084F04C27/00F04C2210/1055
Inventor 彭学院邢林芬温杰贾晓晗冯健美
Owner XI AN JIAOTONG UNIV
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