WO2018161532A1 - 一种用于氢燃料电池系统中的氢气循环泵 - Google Patents

一种用于氢燃料电池系统中的氢气循环泵 Download PDF

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Publication number
WO2018161532A1
WO2018161532A1 PCT/CN2017/102843 CN2017102843W WO2018161532A1 WO 2018161532 A1 WO2018161532 A1 WO 2018161532A1 CN 2017102843 W CN2017102843 W CN 2017102843W WO 2018161532 A1 WO2018161532 A1 WO 2018161532A1
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magnetic member
gear
cam
magnetic
hydrogen
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PCT/CN2017/102843
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English (en)
French (fr)
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顾建军
顾秋林
顾枫
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太仓顺达磁力泵科技有限公司
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Publication of WO2018161532A1 publication Critical patent/WO2018161532A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0064—Magnetic couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1055—Hydrogen (H2)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/12—Polyetheretherketones, e.g. PEEK

Definitions

  • the invention relates to the technical field of hydrogen fuel cells, and in particular to a hydrogen circulation pump used in a hydrogen fuel cell system.
  • Hydrogen fuel cell vehicles use the charge transfer during the chemical reaction between hydrogen and oxygen to form a current, which directly converts chemical energy into electrical energy to drive the motor of the car.
  • the excess hydrogen gas needs to be recovered by the hydrogen circulation pump.
  • the rotating shaft of the hydrogen circulation pump is in contact with the driving end of the motor, and is sealed by a sealing member, and the hydrogen circulating pump is driven by the driving end of the motor.
  • friction occurs in the portion of the sealing member that is in contact with the rotating shaft, causing the sealing member to be broken, resulting in leakage of hydrogen, which not only affects the safety of the vehicle, but also greatly reduces the hydrogen fuel.
  • the cruising range of the battery car The cruising range of the battery car.
  • An object of the present invention is to provide a hydrogen circulation pump for use in a hydrogen fuel cell system in response to the above-described deficiencies of the prior art, which effectively prevents hydrogen gas leakage.
  • the present invention provides a hydrogen circulation pump for use in a hydrogen fuel cell system for improving the sealing performance of a hydrogen circulation pump, the hydrogen circulation pump comprising:
  • a pump body having a first camshaft
  • the magnetic connecting structure comprises a first magnetic member, a magnetically conductive spacer and a second magnetic member;
  • the first magnetic member is coupled to the first camshaft; the second magnetic member is coupled to a driving end of the motor, and the second magnetic member is disposed opposite the first magnetic member;
  • a magnetic spacer is sealingly coupled to the pump body for isolating the first magnetic member and the second magnetic member.
  • the pump body includes:
  • the first rotating mechanism comprising a first gear
  • first gear and the second gear are both made of polyetheretherketone or polytetrafluoroethylene material.
  • the first rotating mechanism further includes a first cam and the first camshaft; the first cam and the first gear are disposed on the first camshaft, and the first camshaft Rotating coaxially; the first cam is adjacent to the driving end with respect to the first gear;
  • the second rotating mechanism further includes a second cam and a second cam shaft; the second cam and the second gear are disposed on the second cam shaft and rotate coaxially with the second cam shaft;
  • first cam and the second cam are both in an "8"-shaped structure, and the recessed portion of the first cam is disposed opposite to the raised portion of the second cam.
  • first magnetic member and the second magnetic member have the same magnetic pole, and the first magnetic member and the second magnetic member rotate synchronously by a repulsive force;
  • the first magnetic member is different from the magnetic pole of the second magnetic member, and the first magnetic member and the second magnetic member rotate synchronously by the action of gravity.
  • the hydrogen circulation pump for a hydrogen fuel cell system seals a magnetically conductive spacer to a pump body and isolates the first magnetic member and the second magnetic member such that the first cam coupled to the first magnetic member
  • the shaft is separated from the drive end connected to the second magnetic member.
  • the driving end of the motor drives the first camshaft to rotate by the magnetic force between the second magnetic member and the first magnetic member.
  • FIG. 1 is a schematic structural view of a hydrogen circulation pump used in a hydrogen fuel cell system of the present invention
  • FIG. 2 is a view showing the direction of the hydrogen circulation pump used in the hydrogen fuel cell system of the present invention.
  • FIG. 1 is a schematic structural diagram of a hydrogen circulation pump used in a hydrogen fuel cell system according to an embodiment of the present invention.
  • a hydrogen circulation pump provided by an embodiment of the present invention is used for recovery of excess hydrogen during operation of a hydrogen fuel cell, and the hydrogen circulation pump includes: a motor 1 , a pump body 2 , and a magnetic connection structure 3 .
  • the electric machine 1 has a drive end 11.
  • the pump body 2 has a first camshaft 213.
  • the magnetic connecting structure 3 includes a first magnetic member 31, a magnetically conductive magnetic spacer 32, and a second magnetic member 33.
  • the first magnetic member 31 is connected to the first camshaft 213.
  • the second magnetic member 33 is coupled to the driving end 11 of the motor 1 , and the second magnetic member 33 is disposed opposite to the first magnetic member 31 .
  • the magnetically conductive magnetic spacer 32 is sealingly connected to the pump body 2 for isolating the first magnetic member 31 and the second magnetic member 33.
  • the first magnetic member 31 and the second magnetic member 33 have the same magnetic pole.
  • the first magnetic member 31 and the second magnetic member 33 rotate synchronously by the action of the repulsive force; or the first magnetic member 31 and the second magnetic member 33 have different magnetic poles, and by the action of gravity, The first magnetic member 31 is caused to rotate in synchronization with the second magnetic member 33.
  • the working process of the hydrogen circulation pump is: when the motor 1 is in operation, the driving end 11 of the motor 1 rotates to drive the connection with the driving end 11.
  • the second magnetic member 33 rotates, and the second magnetic member 33 replies the first magnetic member 31.
  • the first magnetic member 31 also rotates with the second magnetic member 33, thereby driving the first magnetic member 31.
  • the connected first camshaft 213 rotates; if the first magnetic member 31 and the second magnetic member 33 have different magnetic poles, the hydrogen circulation pump works as follows: when the motor 1 is in operation, the driving end 11 of the motor 1 rotates to The second magnetic member 33 connected to the driving end 11 is rotated, and the second magnetic member 33 attracts the first magnetic member 31. Under the attraction force, the first magnetic member 31 also rotates with the second magnetic member 33. Thereby, the first cam shaft 213 connected to the first magnetic member 31 is driven to rotate. Regardless, the magnetic poles of the first magnetic member 31 and the second magnetic member 33 are the same, or the magnetic poles of the first magnetic member 31 and the second magnetic member 33 are different, and the driving end 11 of the motor 1 is driving the first cam shaft 213. During the rotation, the magnetically conductive magnetic spacer 32 separates the first magnetic member 31 and the second magnetic member 33 while being sealed with the pump body 2, effectively preventing hydrogen leakage in the pump body 2, and the sealing property is good.
  • the pump body 2 further includes a first rotating mechanism 21 and a second rotating mechanism 22.
  • the first rotating mechanism 21 includes a first gear 211.
  • the second rotating mechanism 22 includes a second gear 221 .
  • the first gear 211 is meshed with the second gear 221 to connect the first rotating mechanism 21 and the second rotating mechanism 22.
  • the first gear 211 and the second gear 221 are both made of polyetheretherketone or polytetrafluoroethylene material.
  • ether-ether-ketone is a high polymer composed of a repeating unit containing a ketone bond and two ether bonds in the main chain structure, it is a special polymer material. It has a physicochemical property such as high temperature resistance and chemical corrosion resistance. It is a kind of semi-crystalline polymer material with melting point of 334 ° C, softening point of 168 ° C and tensile strength of 132-148 MPa. It can be used as high temperature resistant structural material and electrical insulating material.
  • the reinforcing material can be prepared by compounding with glass fiber or carbon fiber.
  • PTFE Polytetrafluoroethylene
  • non-stick coating or “easy to clean materials. This material is resistant to acids and alkalis, resistant to various organic solvents, almost Not soluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is extremely low.
  • the hydrogen circulation pump transmission gear needs oil bath lubrication.
  • the lubricating grease will volatilize and pollute the phenomenon of the delivered hydrogen.
  • the first gear 211 and the second gear 221 of the embodiment of the present application are both made of polyetheretherketone or polytetrafluoroethylene material, and the first gear 211 and the second gear 221 can be realized even at a rotation speed of 7000 rpm.
  • Lubrication with good mechanical properties and self-lubricating properties, to eliminate the pollution of hydrogen in the high temperature volatilization of the lubricating medium in the prior art, thereby effectively prolonging the service life of the hydrogen fuel cell.
  • the first rotating mechanism 21 may further include a first cam 212 and the first cam shaft 213.
  • the first cam 212 and the first gear 211 are disposed on the first camshaft 213 and rotate coaxially with the first camshaft 213.
  • the first cam 212 is adjacent to the driving end 11 with respect to the first gear 211.
  • the second rotating mechanism 22 may further include a second cam 222 and a second cam shaft 223.
  • the second cam 222 and the second gear 221 are disposed on the second cam shaft 223 and rotate coaxially with the second cam shaft 223.
  • the first gear 211 and the first cam 212 are rotated by the first cam shaft 213 to drive the first gear 211 to drive the second gear 221 to rotate, and the second gear 221 drives the
  • the second cam shaft 223 rotates to drive the second cam 222 to rotate.
  • the first cam 212 and the second cam 222 are both in an "8"-shaped structure, and the recessed portion of the first cam 212 is disposed opposite to the convex portion of the second cam 222.
  • the first gear and the second gear are disposed away from the driving end of the motor by disposing the first cam and the second cam close to the driving end of the motor, so that the first cam and the second cam with large rotational fluctuations are in the hydrogen gas.
  • the position of the center of gravity of the circulating pump effectively prevents sloshing, making the hydrogen circulation pump more stable during operation.
  • the hydrogen circulation pump provided by the present invention seals and connects the first magnetic member and the second magnetic member by connecting the magnetic permeability spacer to the pump body, and connects the first cam shaft connected to the first magnetic member and the second magnetic member.
  • the drive side is separated.
  • the driving end of the motor drives the first camshaft to rotate by the magnetic force between the second magnetic member and the first magnetic member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel Cell (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

一种用于氢燃料电池系统中的氢气循环泵，包括：电机（1）、泵体（2）和磁性连接结构（3）。所述电机（1）具有驱动端（11）；所述泵体（2）具有第一凸轮轴（213）；磁性连接结构（3）包括第一磁性件（31）、导磁隔离件（32）和第二磁性件（33）；其中，所述第一磁性件（31）与所述第一凸轮轴（213）连接；所述第二磁性件（33）与所述电机的驱动端（11）连接，且所述第二磁性件（33）与所述第一磁性件（31）相对设置；所述导磁隔离件（32）与所述泵体（2）密封连接，用于隔离所述第一磁性件（31）和所述第二磁性件（33）。该循环泵在组装过程中可有效防止密封圈刮伤或损坏，避免了传动轴在转动过程中，与密封件产生摩擦致使密封件破损，从而导致氢气发生泄漏的现象，有效的提高了对氢气的密封性，安全性较高。

Description

一种用于氢燃料电池系统中的氢气循环泵 技术领域
本发明涉及氢燃料电池技术领域，具体涉及一种用于氢燃料电池系统中的氢气循环泵。
背景技术
氢燃料电池汽车是利用氢气跟氧气化学反应过程中的电荷转移来形成电流，从而直接将化学能转化为电能进而来驱动汽车电动机工作的。为了防止与氧气发生化学反应的氢气排出，以保证氢燃料电池的使用寿命，在氢燃料电池内部的氧气与氢气发生化学反应后，需要通过氢气循环泵将多余的氢气回收。
目前，氢气循环泵的转动轴与电机驱动端接触，并通过密封件密封，通过电机的驱动端驱动氢气循环泵工作。但是，氢气循环泵的转动轴在转动的过程中，密封件与转动轴接触的部分产生摩擦，致使密封件破损，导致氢气发生泄漏，不但对车的安全造成影响，而且会极大地缩减氢燃料电池汽车的续航里程。
发明内容
本发明的目的在于针对上述现有技术的不足，提供了一种用于氢燃料电池系统中的氢气循环泵，有效防止氢气泄漏。
为实现上述目的，本发明采用了如下技术方案：
本发明提供了一种用于氢燃料电池系统中的氢气循环泵，用于提高氢气循环泵的密封性能，所述氢气循环泵包括：
电机，所述电机具有驱动端；
泵体，所述泵体具有第一凸轮轴；
磁性连接结构，磁性连接结构包括第一磁性件、导磁隔离件和第二磁性件；其中，
所述第一磁性件与所述第一凸轮轴连接；所述第二磁性件与所述电机的驱动端连接，且所述第二磁性件与所述第一磁性件相对设置；所述导磁隔离件与所述泵体密封连接，用于隔离所述第一磁性件和所述第二磁性件。
进一步地，所述的所述泵体包括：
第一转动机构，所述第一转动机构包括第一齿轮；
第二转动机构，所述包括第二齿轮；
通过所述第一齿轮与所述第二齿轮啮合，以连接所述第一转动机构与所述第二转动机构；
其中，所述第一齿轮与所述第二齿轮均由聚醚醚酮或聚四氟乙烯材料制成。
进一步地，所述第一转动机构还包括第一凸轮和所述第一凸轮轴；所述第一凸轮和所述第一齿轮设置在所述第一凸轮轴上，与所述第一凸轮轴同轴转动；所述第一凸轮相对所述第一齿轮靠近所述驱动端；
所述第二转动机构还包括第二凸轮和第二凸轮轴；所述第二凸轮和所述第二齿轮设置在所述第二凸轮轴上，与所述第二凸轮轴同轴转动；
通过所述第一凸轮轴带动所述第一齿轮和所述第一凸轮转动，以使所述第一齿轮驱动所述第二齿轮转动，所述第二齿轮驱动所述第二凸轮轴转动以带动所述第二凸轮转动。
进一步地，所述第一凸轮和所述第二凸轮均为“8”字型结构，所述第一凸轮的凹陷部与所述第二凸轮的凸起部相对设置。
进一步地，所述第一磁性件与所述第二磁性件磁极相同，通过斥力的作用，使得所述第一磁性件与所述第二磁性件同步转动；
或者，
所述第一磁性件与所述第二磁性件磁极相异，通过引力的作用，使得所述第一磁性件与所述第二磁性件同步转动。
采用上述技术方案，本发明的有益效果为：
本发明提供的用于氢燃料电池系统中的氢气循环泵通过将导磁隔离件与泵体密封连接，并隔离第一磁性件和第二磁性件，使得与第一磁性件连接的第一凸轮轴和与第二磁性件连接的驱动端分离。当电机工作时，电机的驱动端通过第二磁性件与第一磁性件之间的磁力，驱动第一凸轮轴转动。较现有技术，避免了传动轴在转动过程中，与密封件产生摩擦致使密封件破损，从而导致氢气发生泄漏的现象，有效的提高了对氢气的密封性，安全性较高。
附图说明
图1为本发明的用于氢燃料电池系统中的氢气循环泵的结构示意图；
图2为本发明的用于氢燃料电池系统中的氢气循环泵的A向示图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
图1为本发明实施例提供的一种用于氢燃料电池系统中的氢气循环泵的结构示意图。如图1所示，本发明实施例提供的氢气循环泵用于氢燃料电池工作过程中，多余氢的回收，该氢气循环泵包括：电机1、泵体2和磁性连接结构3。所述电机1具有驱动端11。所述泵体2具有第一凸轮轴213。磁性连接结构3包括第一磁性件31、导磁导磁隔离件32和第二磁性件33。其中，所述第一磁性件31与所述第一凸轮轴213连接。所述第二磁性件33与所述电机1的驱动端11连接，且所述第二磁性件33与所述第一磁性件31相对设置。所述导磁导磁隔离件32与所述泵体2密封连接，用于隔离所述第一磁性件31和所述第二磁性件33。
在本实施例中，所述第一磁性件31与所述第二磁性件33磁极相同， 通过斥力的作用，使得所述第一磁性件31与所述第二磁性件33同步转动；或者，所述第一磁性件31与所述第二磁性件33磁极相异，通过引力的作用，使得所述第一磁性件31与所述第二磁性件33同步转动。
具体实施时，若第一磁性件31与所述第二磁性件33磁极相同，氢气循环泵的工作过程为：当电机1工作时，电机1的驱动端11转动，以带动与驱动端11连接的第二磁性件33转动，第二磁性件33给第一磁性件31斥力，在斥力作用下，第一磁性件31也对随着第二磁性件33转动，从而驱动与第一磁性件31连接的第一凸轮轴213转动；若第一磁性件31与所述第二磁性件33磁极相异，氢气循环泵的工作过程为：当电机1工作时，电机1的驱动端11转动，以带动与驱动端11连接的第二磁性件33转动，第二磁性件33给第一磁性件31吸引力，在吸引力作用下，第一磁性件31也对随着第二磁性件33转动，从而驱动与第一磁性件31连接的第一凸轮轴213转动。无论是，第一磁性件31与所述第二磁性件33磁极相同，还是第一磁性件31与所述第二磁性件33磁极相异，电机1的驱动端11在驱动第一凸轮轴213转动的过程中，导磁导磁隔离件32隔离第一磁性件31和第二磁性件33的同时保持与泵体2密封，有效的防止泵体2内的氢气泄漏，密封性较好。
如图1所示，所述泵体2进一步包括：第一转动机构21和第二转动机构22。所述第一转动机构21包括第一齿轮211。所述第二转动机构22包括第二齿轮221。通过所述第一齿轮211与所述第二齿轮221啮合，以连接所述第一转动机构21与所述第二转动机构22。其中，所述第一齿轮211与所述第二齿轮221均由聚醚醚酮或聚四氟乙烯材料制成。
由于聚醚醚酮(ether-ether-ketone，PEEK)，是在主链结构中含有一个酮键和两个醚键的重复单元所构成的高聚物，属特种高分子材料。具有耐高温、耐化学药品腐蚀等物理化学性能，是一类半结晶高分子材料，熔点334℃，软化点168℃，拉伸强度132～148MPa，可用作耐高温结构材料和电绝缘材料，可与玻璃纤维或碳纤维复合制备增强材料。
聚四氟乙烯(Polytetrafluoroethylene，PTFE)，一般称作“不粘涂层”或“易清洁物料。这种材料具有抗酸抗碱、抗各种有机溶剂的特点，几乎 不溶于所有的溶剂。同时，聚四氟乙烯具有耐高温的特点，它的摩擦系数极低。
因此，较现有技术中，氢气循环泵传动齿轮需要油浴润滑，当氢气循环泵在高速旋转时，润滑油脂会挥发，污染了输送的氢气的现象。本申请实施例的第一齿轮211与所述第二齿轮221均由聚醚醚酮或聚四氟乙烯材料制成，第一齿轮211与第二齿轮221即使在转速为7000rpm时也能实现自润滑，具有较好机械特性及自润滑特性，以消除现有技术中润滑介质高温挥发对氢气的污染，进而有效的延长了氢燃料电池的使用寿命。
如图2所示，所述第一转动机构21还可以包括第一凸轮212和所述第一凸轮轴213。所述第一凸轮212和所述第一齿轮211设置在所述第一凸轮轴213上，与所述第一凸轮轴213同轴转动。所述第一凸轮212相对所述第一齿轮211靠近所述驱动端11。所述第二转动机构22还可以包括第二凸轮222和第二凸轮轴223。所述第二凸轮222和所述第二齿轮221设置在所述第二凸轮轴223上，与所述第二凸轮轴223同轴转动。通过所述第一凸轮轴213带动所述第一齿轮211和所述第一凸轮212转动，以使所述第一齿轮211驱动所述第二齿轮221转动，所述第二齿轮221驱动所述第二凸轮轴223转动以带动所述第二凸轮222转动。其中，所述第一凸轮212和所述第二凸轮222均为“8”字型结构，所述第一凸轮212的凹陷部与所述第二凸轮222的凸起部相对设置。
本发明实施例通过将第一凸轮和第二凸轮靠近电机的驱动端设置，将第一齿轮和第二齿轮远离电机的驱动端设置，使得转动波动较大的第一凸轮和第二凸轮处于氢气循环泵的重心位置，有效防止晃动，使得氢气循环泵工作过程中较稳定。
本发明提供的氢气循环泵通过将导磁隔离件与泵体密封连接，并隔离第一磁性件和第二磁性件，使得与第一磁性件连接的第一凸轮轴和与第二磁性件连接的驱动端分离。当电机工作时，电机的驱动端通过第二磁性件与第一磁性件之间的磁力，驱动第一凸轮轴转动。较现有技术，避免了传动轴在转动过程中，与密封件产生摩擦致使密封件破损，从而导致氢气发生泄漏的现象，有效的提高了对氢气的密封性，安全性较高。
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (5)

  1. 一种用于氢燃料电池系统中的氢气循环泵，其特征在于，包括：
    电机，所述电机具有驱动端；
    泵体，所述泵体具有第一凸轮轴；
    磁性连接结构，磁性连接结构包括第一磁性件、导磁隔离件和第二磁性件；其中，
    所述第一磁性件与所述第一凸轮轴连接；所述第二磁性件与所述电机的驱动端连接，且所述第二磁性件与所述第一磁性件相对设置；所述导磁隔离件与所述泵体密封连接，用于隔离所述第一磁性件和所述第二磁性件。
  2. 根据权利要求1所述的用于氢燃料电池系统中的氢气循环泵，其特征在于，所述泵体包括：
    第一转动机构，所述第一转动机构包括第一齿轮；
    第二转动机构，所述包括第二齿轮；
    通过所述第一齿轮与所述第二齿轮啮合，以连接所述第一转动机构与所述第二转动机构；
    其中，所述第一齿轮与所述第二齿轮均由聚醚醚酮或聚四氟乙烯材料制成。
  3. 根据权利要求2所述的用于氢燃料电池系统中的氢气循环泵，其特征在于，
    所述第一转动机构还包括第一凸轮和所述第一凸轮轴；所述第一凸轮和所述第一齿轮设置在所述第一凸轮轴上，与所述第一凸轮轴同轴转动；所述第一凸轮相对所述第一齿轮靠近所述驱动端；
    所述第二转动机构还包括第二凸轮和第二凸轮轴；所述第二凸轮和所述第二齿轮设置在所述第二凸轮轴上，与所述第二凸轮轴同轴转动；
    通过所述第一凸轮轴带动所述第一齿轮和所述第一凸轮转动，以使所述第一齿轮驱动所述第二齿轮转动，所述第二齿轮驱动所述第二凸轮轴转动以带动所述第二凸轮转动。
  4. 根据权利要求3所述的用于氢燃料电池系统中的氢气循环泵，其特征在于，
    所述第一凸轮和所述第二凸轮均为“8”字型结构，所述第一凸轮的凹陷部与所述第二凸轮的凸起部相对设置。
  5. 根据权利要求1～4中任意一项所述的用于氢燃料电池系统中的氢气循环泵，其特征在于，
    所述第一磁性件与所述第二磁性件磁极相同，通过斥力的作用，使得所述第一磁性件与所述第二磁性件同步转动；
    或者，
    所述第一磁性件与所述第二磁性件磁极相异，通过引力的作用，使得所述第一磁性件与所述第二磁性件同步转动。
PCT/CN2017/102843 2017-03-08 2017-09-22 一种用于氢燃料电池系统中的氢气循环泵 WO2018161532A1 (zh)

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