JP2021064575A - Fuel cell system - Google Patents

Abstract

To provide a fuel cell system capable of suppressing expansion stress caused by heat of a high-temperature component on an unexpected part.SOLUTION: There is provided a fuel cell system 100 which includes: a housing 1 for housing a high-temperature component including at least one of a fuel cell 2 and a reformer 3 for supplying fuel to the fuel cell 2; at least one uniaxial mount 4 which is fixed to the housing 1 and which is displaceable in only one direction; and at least one elastic body 5 which is fixed to the housing 1 and which is displaceable in only one direction by elastic deformation. The high-temperature component is fixed to the housing 1 via the uniaxial mounts 4 and the elastic bodies 5. The elastic bodies 5 are arranged to be displaceable in a direction different from a direction in which the at least one uniaxial mount 4 is displaceable. The uniaxial mounts 4 and the elastic bodies 5 are arranged such that each mount axis extending in a direction where each uniaxial mount 4 can be displaced and each displacement direction line extending in a direction where each elastic body 5 can be displaced intersect at one point or at a plurality of points near a desired position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fuel cell system.

Conventionally, a fuel cell system including a solid oxide fuel cell that generates power by steam reforming a hydrocarbon fuel using a reformer is known. The solid oxide fuel cell has an advantage that it can generate electricity with easily available fuel such as natural gas or ethanol. However, since the reaction temperature of a solid oxide fuel cell is high, parts such as a fuel cell stack and a reformer become hot during operation.

When the fuel cell system is mounted on a vehicle, it is preferable to fasten and arrange parts such as a fuel cell and a reformer in a metal housing from the viewpoint of waterproofness and chipping resistance. However, when parts such as the solid oxide fuel cell stack and reformer fastened inside the housing become hot, the housing and the hot parts are deformed due to the expansion stress caused by heat, and the fastened parts become loose and the parts become loose. May cause damage or deterioration. In addition, when parts such as fuel cell stacks and reformers become hot, excessive expansion stress is applied to the piping connected to the high temperature part, and if there is no stress absorption structure, the piping etc. will be deformed or damaged, or There is also a problem that the airtightness deteriorates due to the occurrence of cracks or the like.

Patent Document 1 discloses a support structure for a reformer that fixes the reformer arranged in the housing to the housing. In this support structure, in order to relieve stress due to thermal expansion of the reformer, the reformer is fixed to the inner wall of the housing by a bracket via an elastic mount such as a rubber material.

JP-A-2002-284506

In the support structure of the reformer described in Patent Document 1, although the expansion stress of the portion provided with the elastic mount can be relaxed, the expansion stress due to heat is still applied to the other portions. Therefore, expansion stress due to heat is applied to a part of the reformer, a pipe for supplying fuel to the reformer, and other unexpected parts.

An object of the present invention is to provide a fuel cell system capable of suppressing an expansion stress due to heat of a high temperature component from being applied to an unexpected portion.

According to one aspect of the present invention, there is provided a fuel cell system comprising a housing for accommodating a fuel cell and a high temperature component including at least one of a reformer that supplies fuel to the fuel cell. This fuel cell system includes at least one uniaxial mount that is fixed to the housing and can be displaced in only one direction, and at least one elastic body that is fixed to the housing and can be displaced in only one direction by elastic deformation. To be equipped. The high temperature components housed in the housing are fixed to the housing via a uniaxial mount and an elastic body, and the elastic body is displaceably arranged in a direction different from the displaceable direction of at least one uniaxial mount. Displacement. Further, in the uniaxial mount and the elastic body, each mount axis extending in the displaceable direction of each uniaxial mount and each displacement direction line extending in the displaceable direction of each elastic body are at one point or near a desired position. It is arranged so that it intersects at multiple points.

According to the present invention, the high temperature component housed in the housing is fixed to the housing via a uniaxial mount that can be displaced in only one direction and an elastic body that can be displaced in only one direction. Further, in the uniaxial mount and the elastic body, each mount axis extending in the displaceable direction of each uniaxial mount and each displacement direction line extending in the displaceable direction of each elastic body are at one point or near a desired position. It is arranged so that it intersects at multiple points. As a result, the displacement direction due to thermal expansion of the high-temperature component can be controlled, so that expansion stress can be prevented from being applied to an unexpected portion, deterioration of the system component can be suppressed, and damage to the component can be avoided.

FIG. 1 is a diagram showing the inside of the housing of the fuel cell system according to the first embodiment. FIG. 2 is a perspective view of the uniaxial mount. FIG. 3a is a schematic view of the uniaxial mount according to the modified example as viewed from the front. FIG. 3b is a schematic view of the uniaxial mount according to the modified example as viewed from the side. FIG. 4a is a side view of the leaf spring. FIG. 4b is a perspective view of the leaf spring. FIG. 5 is a diagram illustrating deformation of the leaf spring when the high temperature component expands. FIG. 6 is a diagram showing the inside of the housing when the uniaxial mount and the leaf spring are installed. FIG. 7 is a view when the fuel cell system is mounted on the vehicle. FIG. 8 is a diagram showing the inside of the housing of the fuel cell system according to the first modification of the first embodiment. FIG. 9 is a diagram illustrating deformation of the leaf spring when the high temperature component expands. FIG. 10 is a diagram showing the inside of the housing of the fuel cell system according to the second modification of the first embodiment. FIG. 11 is a diagram showing the inside of the housing of the fuel cell system according to the third modification of the first embodiment. FIG. 12 is a diagram showing the inside of the housing of the fuel cell system according to the third modification of the first embodiment. FIG. 13a is a schematic view of a uniaxial mount in the fuel cell system according to the second embodiment. FIG. 13b is a schematic assembly diagram of a uniaxial mount in the fuel cell system according to the second embodiment. FIG. 14 is a diagram showing the inside of the housing of the fuel cell system according to the third embodiment. FIG. 15a is a side view of the elastic body in the fuel cell system according to the third embodiment. FIG. 15b is a top view of the elastic body in the fuel cell system according to the third embodiment. FIG. 15c is a perspective view of an elastic body in the fuel cell system according to the third embodiment. FIG. 16 is a diagram showing the inside of the fuel cell system housing according to the fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like.

(First Embodiment)
FIG. 1 is a view showing the inside of the housing of the fuel cell system 100 according to the first embodiment, and is a view seen from the bottom surface direction of the housing 1.

The fuel cell system 100 supplies the fuel cell stack 2 with the fuel gas (anode gas) and the oxidizing agent gas (cathode gas) required for power generation, and supplies the fuel cell stack 2 with electricity such as an electric motor for traveling a vehicle. It is a system that generates electricity according to the load.

A fuel cell stack 2 and a reformer 3 that reforms fuel and supplies anode gas to the fuel cell stack 2 are arranged in the housing 1 of the fuel cell system 100. The fuel cell stack 2 and the reformer 3 are discharged from the anode gas supply pipe (connecting pipe) 21 for supplying the reformed fuel gas from the reformer 3 to the fuel cell stack 2 and the fuel cell stack 2. It is connected to the first exhaust pipe (connecting pipe) 22 through which the exhaust gas flows. Further, the reformer 3 is provided via a fuel supply pipe 31 for supplying fuel to the reformer 3, an intake pipe 32 for supplying air, and a second exhaust pipe 33 for discharging exhaust gas from the reformer 3. It is connected to external accessories. In addition to this, the fuel cell system 100 is provided with a cathode gas supply pipe, which is omitted in the description of the effect of the present invention because it is the same as the anode gas supply pipe.

The housing 1 is made of metal or the like, and houses the fuel cell stack 2 and the reformer 3. A heat insulating material 6 is provided inside the housing 1 in order to suppress heat loss due to heat dissipation of the fuel cell stack 2 and the reformer 3 having a high reaction temperature. The heat insulating material 6 is provided in the housing 1 in a state where the fuel cell stack 2 and the reformer 3 can be accommodated.

The fuel cell stack 2 is a high-temperature component that operates at a high temperature, and generates electricity by receiving the supply of anode gas and cathode gas. The fuel cell stack 2 is configured by stacking a plurality of fuel cells or fuel cell unit cells, and each fuel cell as a power source is, for example, a solid oxide fuel cell (SOFC).

The reformer 3 is a high-temperature component that operates at a high temperature, and reforms the fuel cell before reforming so as to be in an appropriate state for supplying the fuel to the fuel cell stack 2. For example, the reformer 3 reforms the fuel supplied from the fuel supply pipe 31 into a fuel gas (anode gas) containing hydrogen by a catalytic reaction.

Further, the reformer 3 is provided with an exhaust combustor (not shown). The exhaust combustor generates combustion gas by catalytically burning the exhaust gas discharged from the fuel cell stack 2. The combustion gas generated by the exhaust combustor heats the reformer 3 by heat exchange.

The anode gas supply pipe 21 is a pipe that supplies the anode gas reformed by the reformer 3 to the fuel cell stack 2, and connects the reformer 3 and the fuel cell stack 2. The anode gas supply pipe 21 is joined to the reformer 3 at one end and to the fuel cell stack 2 at the other end by welding or the like. Further, the anode gas supply pipe 21 is a flexible pipe provided with a flexible portion 211 having flexibility in a part or all of the pipe.

The first exhaust pipe 22 is a pipe that sends the exhaust gas discharged from the fuel cell stack 2 to the exhaust combustor in the reformer 3, and connects the fuel cell stack 2 and the reformer 3. The first exhaust pipe 22 is joined to the reformer 3 at one end and to the fuel cell stack 2 at the other end by welding or the like. Further, the first exhaust pipe 22 is a flexible pipe provided with a flexible portion 221 having flexibility in a part or all of the pipe. The first exhaust pipe 22 is installed in the same direction as the anode gas supply pipe 21. Hereinafter, the anode gas supply pipe 21 and the first exhaust pipe 22 are collectively referred to as connecting pipes 21 and 22.

The fuel supply pipe 31 is a connecting member that connects the reformer 3 and an auxiliary machine outside the housing 1, and is a pipe that supplies fuel before reforming to the reformer 3. One end of the fuel supply pipe 31 is joined to the reformer 3 by welding or the like, and the other end is connected to an auxiliary machine such as a valve.

The intake pipe 32 is a connecting member that connects the reformer 3 and an auxiliary machine outside the housing 1. For example, when the reformer 3 is warmed up when the system is started, air for burning fuel is supplied. , A pipe that supplies air to the reformer 3 as needed. One end of the intake pipe 32 is joined to the reformer 3 by welding or the like, and the other end is connected to an auxiliary machine such as a valve.

The second exhaust pipe 33 is a connecting member that connects the reformer 3 and the auxiliary machine outside the housing 1, and is a pipe that discharges the combustion gas generated by the exhaust combustor to the outside of the housing 1. One end of the second exhaust pipe 33 is joined to the reformer 3 by welding or the like, and the other end is connected to an auxiliary machine such as a valve.

The fuel supply pipe 31, the intake pipe 32, and the second exhaust pipe 33 are installed in the same direction, respectively. Hereinafter, the fuel supply pipe 31, the intake pipe 32, and the second exhaust pipe 33 are collectively referred to as connecting members 31, 32, 33. The connecting members 31, 32, 33 are installed in the same direction as the connecting pipes 21 and 22.

In the fuel cell system 100 configured in this way, the fuel supplied from the fuel supply pipe 31 is reformed into an anode gas by the reformer 3, and the reformed anode gas is a fuel cell stack from the anode gas supply pipe 21. It is supplied to 2. The fuel cell stack 2 is supplied with cathode gas from the outside of the housing 1 via a cathode gas supply pipe (not shown).

On the other hand, the exhaust gas discharged from the fuel cell stack 2 is sent to the exhaust combustor in the reformer 3 via the first exhaust pipe 22, and the exhaust combustor catalytically burns the exhaust gas to generate combustion gas. .. The combustion gas generated by the exhaust combustor heats the reformer 3 by heat exchange and then is discharged to the outside of the housing 1 via the second exhaust pipe 33.

Along with the reformer 3, an evaporator that heats liquid fuel to generate pre-reform fuel gas, and a pre-reform fuel that exchanges heat between the combustion gas generated by the exhaust combustor and the pre-reform fuel gas. A superheater or the like that overheats the gas may be arranged in the housing 1. Further, the reformer 3 may be configured as a reformer unit including an evaporator, a superheater and the like.

Further, from the viewpoint of fuel efficiency, it is preferable to connect the fuel cell stack 2 and the reformer 3 with an exhaust pipe to use off-gas, but the present invention is not limited to this, and the fuel cell stack 2 and the reformer 3 are connected. The first exhaust pipe 22 to be connected may not be provided.

Next, the support structures of the fuel cell stack 2 and the reformer 3 will be described.

As shown in FIG. 1, the fuel cell stack 2 and the reformer 3 are fixed to the housing 1 via a pair of uniaxial mounts 4 and leaf springs (elastic bodies) 5, respectively.

A pair of uniaxial mounts 4 for fixing the fuel cell stack 2 to the housing 1 and a pair of uniaxial mounts 4 for fixing the reformer 3 to the housing 1 are fixed to the housing 1. Each uniaxial mount 4 is configured to be displaceable in only one direction (mount axis direction). The lower surface of the uniaxial mount 4 is fixed to the housing 1 and the upper surface is the fuel cell stack so that the housing 1, the fuel cell stack 2 and the reformer 3 can move relative to each other in the displacement direction of the uniaxial mount 4. It is fixed to 2 and the reformer 3. In this way, the uniaxial mount 4 fixes the fuel cell stack 2 and the reformer 3 to the housing 1. The details of the structure of the uniaxial mount 4 will be described later.

Further, a pair of leaf springs 5 for fixing the fuel cell stack 2 to the housing 1 and a pair of leaf springs 5 for fixing the reformer 3 to the housing 1 are fixed to the housing 1. The leaf spring 5 is, for example, an elastic body made of metal, and is configured to be displaceable in only one direction (the direction of elastic deformation). One end of the leaf spring 5 is fixed to the housing 1 via the bracket 51 so that the housing 1, the fuel cell stack 2 and the reformer 3 can move relative to each other in the displacement direction of the leaf spring 5, and the other end. Is fixed to the fuel cell stack 2 and the reformer 3 via the bracket 52. In this way, the pair of leaf springs 5 fix the fuel cell stack 2 and the reformer 3 to the housing 1. The details of the structure of the leaf spring 5 will be described later.

The uniaxial mount 4 and the leaf spring 5 for fixing the fuel cell stack 2 to the housing 1 have a mount axis extending in the displaceable direction of each uniaxial mount 4 and a displacement of each leaf spring 5 extending in the displaceable direction. The direction lines are arranged so that they intersect at one point X. Further, the leaf spring 5 is displaceably arranged in a direction different from the displaceable direction of the uniaxial mount 4.

More specifically, the pair of uniaxial mounts 4 for fixing the fuel cell stack 2 to the housing 1 are arranged at positions facing each other, and each mount axis is in the longitudinal direction of the connecting pipes 21 and 22 (hereinafter, pipes). They are arranged so as to be in the same direction (referred to as the direction) (the y direction in FIG. 1) and so that the mount axes overlap each other. Further, the pair of leaf springs 5 for fixing the fuel cell stack 2 to the housing 1 are arranged at positions facing each other, and in the direction in which the displacement direction lines intersect at right angles with the piping direction (x direction in FIG. 1). It is arranged so that the displacement direction lines overlap each other. The uniaxial mount 4 and the leaf spring 5 for fixing the fuel cell stack 2 to the housing 1 are arranged so that each mount axis of the uniaxial mount 4 and each displacement direction line of the leaf spring 5 intersect at a right angle at a point X. Has been done.

Similarly, the uniaxial mount 4 and the leaf spring 5 for fixing the reformer 3 to the housing 1 are oriented in the displaceable direction of the mount axis and each leaf spring 5 extended in the displaceable direction of each uniaxial mount 4. The extended displacement direction lines are arranged so as to intersect at one point Y. Further, the leaf spring 5 is displaceably arranged in a direction different from the displaceable direction of the uniaxial mount 4.

More specifically, the plurality of uniaxial mounts 4 for fixing the reformer 3 to the housing 1 are arranged at positions facing each other, and the mount axes are oriented in the piping direction (y direction in FIG. 1). The mount axes are arranged so as to overlap each other. Further, the pair of leaf springs 5 for fixing the reformer 3 to the housing 1 are arranged at positions facing each other, and in the direction in which the displacement direction lines intersect at right angles to the piping direction (x direction in FIG. 1). It is arranged so that the displacement direction lines overlap each other. The uniaxial mount 4 and the leaf spring 5 for fixing the reformer 3 to the housing 1 are arranged so that each mount axis of the uniaxial mount 4 and each displacement direction line of the leaf spring 5 intersect at a right angle at a point Y. Has been done.

The point where the axis of the uniaxial mount 4 and the displacement direction line of the leaf spring 5 intersect is a point where the high temperature component inside the housing is not displaced relative to the housing 1 even when the high temperature component is thermally expanded, that is, an expansion center is formed. When the high temperature component expands thermally, it expands and displaces radially from the expansion center. Therefore, in the uniaxial mount 4 whose mount axis passes through the expansion center and the leaf spring 5 whose displacement direction line passes through the expansion center, the displaceable direction of the uniaxial mount 4 and the leaf spring 5 and the direction of the expansion displacement coincide with each other. .. Therefore, the uniaxial mount 4 and the leaf spring 5 can allow the thermal expansion of the high temperature component inside the housing 1.

By arranging the pair (two) uniaxial mounts 4 and the pair (two) leaf springs 5 so that the mount axes and the displacement direction lines intersect at one point in this way, the high temperature component inside the housing It is possible to form a point (expansion center) that does not displace relative to the housing 1 even when the spring is thermally expanded.

Further, since the leaf spring 5 is displaceably arranged in a direction different from the displaceable direction of the uniaxial mount 4, the housing 1 is affected by the withstand force (rigidity) in the pulling direction and the buckling direction of the leaf spring 5. Movement of internal high temperature components in the mounting axis direction (y direction in FIG. 1) is restricted. Similarly, since the uniaxial mount 4 is displaceably arranged in a direction different from the displaceable direction of the leaf spring 5, the high temperature component inside the housing 1 is in the displacement direction line direction of the leaf spring 5 (FIG. 1). It is restricted to move in the x direction of. When the high temperature component inside the housing swings, there is a problem that noise is generated due to the slight movement of the uniaxial mount 4. On the other hand, in the present embodiment, the leaf spring 5 regulates the movement of the high temperature component in the mounting axial direction, and the uniaxial mount 4 regulates the movement of the high temperature component in the displacement direction line direction, so that even if vibration or the like occurs. , The high temperature component housed in the housing 1 is suppressed from swinging in the horizontal direction with respect to the housing 1. Therefore, it is possible to suppress the noise generated by the slight movement of the uniaxial mount 4 due to the swing of the high temperature component.

If the high temperature component is fixed to the housing 1 only by an elastic body such as the leaf spring 5, it becomes difficult to position the high temperature component. However, in the present embodiment, not only the leaf spring (elastic body) 5 but also the high temperature component is used. The uniaxial mount 4 is also used to fix the high temperature component to the housing 1. Therefore, it is easier to position the high temperature component as compared with the case where only the leaf spring (elastic body) 5 is used.

Next, the structure of the uniaxial mount 4 will be described with reference to FIG.

FIG. 2 is a perspective view of the uniaxial mount 4.

As shown in FIG. 2, the uniaxial mount 4 is composed of a component fixing member 41 fastened to high temperature parts (fuel cell stack 2 and reformer 3) and a housing fixing member 42 fastened to the housing 1. It is composed.

The component fixing member 41 is made of, for example, a heat-resistant metal material, and has a parallel portion 411 extending in a direction parallel to the bottom surface of the high-temperature component housed in the housing 1 and an extension extending downward from the center of the parallel portion 411. It has a setting part 412 and. Holes 413 penetrating from the upper surface to the lower surface of the parallel portion 411 are provided at both ends of the parallel portion 411, and high-temperature components are fastened to the upper surface side of the component fixing member 41 by bolts or the like through the holes 413. A dovetail groove 414 is formed at the tip of the extension portion 412.

The housing fixing member 42 is made of, for example, a heat-resistant metal material, and has a parallel portion 421 extending in a direction parallel to the housing 1 and an extending portion 422 extending upward from the center of the parallel portion 421. Holes 423 penetrating from the upper surface to the lower surface of the parallel portion 421 are provided at both ends of the parallel portion 421, and the housing fixing member 42 is housing through the holes 423 via brackets 424 (see FIG. 6) by bolts or the like. It is fastened to 1. The extension portion 422 is formed as a dovetail shape corresponding to the dovetail groove 414 of the component fixing member 41.

A rail that can be displaced only in one direction (sliding direction) by slidably engaging the dovetail groove 414 of the component fixing member 41 and the extending portion 422 of the housing fixing member 42 formed as a dovetail shape. The uniaxial mount 4 of the formula is configured.

As described above, the uniaxial mount 4 is displaceably arranged in a direction different from the displaceable direction of the leaf spring 5. Therefore, even when vibration is applied to the high temperature parts (fuel cell stack 2 and reformer 3) in the direction perpendicular to the piping direction (x direction in FIG. 1), the rail (ant type) of the uniaxial mount 4 is applied.・ The dovetail groove) regulates the movement of high-temperature parts in the x direction. This prevents the high temperature component from swinging in the x direction.

The uniaxial mount 4 does not necessarily have to have a dovetail type or a rail type configuration using dovetail grooves. For example, as shown in FIGS. 3a and 3b, the uniaxial mount 4 is composed of a guide 43 fixed to the bottom surface of a high temperature component and a rail 44 fixed to the housing 1, and the rail 44 is held by the guide 43. The structure may be as follows. In this case, the guide 43 fitted to the rail 44 is configured to be freely displaceable in the rail direction. As a result, the uniaxial mount 4 is configured to be displaceable in only one direction. Further, since the structure is such that the rail 44 is held by the guide 43, the guide 43 is configured so as not to come off from the rail 44 due to vibration in the vertical direction.

Further, the method of fixing the uniaxial mount 4 to the high temperature component and the housing 1 does not necessarily have to be fastened with bolts or the like, and may be fixed to the high temperature component and the housing 1 by welding or the like, for example.

Next, the structure of the leaf spring 5 will be described with reference to FIGS. 4 and 5.

FIG. 4a is a side view of the leaf spring 5, and FIG. 4b is a perspective view of the leaf spring 5.

The leaf spring 5 is, for example, a plate-shaped elastic member made of a heat-resistant metal material, and as shown in FIGS. 4a and 4b, a component fastening portion 53 to be fastened to a high-temperature component (fuel cell stack 2 and reformer 3). And a housing fixing portion 54 to be fastened to the housing 1 and a central portion 55.

The component fastening portion 53 is formed at one end of the leaf spring 5, and the component fastening portion 53 is provided with a hole 531 penetrating the side surface of the leaf spring 5. One side surface of the leaf spring 5 is fastened to the high temperature component through the hole 531 through the hole 531 and the bracket 52 (see FIGS. 1 and 6) of the leaf spring 5.

The housing fixing portion 54 is formed at the other end of the leaf spring 5, and the housing fixing portion 54 is provided with a hole 541 penetrating the side surface of the leaf spring 5. In the housing fixing portion 54, the leaf spring 5 is fastened to the housing 1 on the opposite side surface via the bracket 51 (see FIGS. 1 and 6) through the hole 541 by a bolt or the like.

The central portion 55 is a portion where elastic deformation occurs, and the component fastening portion 53 and the housing fixing portion 54 are connected at an angle θ.

The leaf spring 5 can be flexed and deformed (elastically deformed) in the direction in which the central portion 55 intersects the piping direction at right angles (x direction in FIG. 1) with the housing fixing portion 54 as a fulcrum, thereby unidirectionally (elastically deforming). It is configured to be displaceable only in the deformation direction).

The method of fixing the leaf spring 5 to the high temperature component and the housing 1 does not necessarily have to be fastened with bolts or the like, and may be fixed to the high temperature component and the housing 1 by welding or the like, for example.

FIG. 5 is a diagram illustrating deformation of the leaf spring 5 when the high temperature component expands.

When the high-temperature component expands, the leaf spring 5 elastically deforms by δx in the x direction (the direction at which the high-temperature component intersects at right angles to the piping direction) from the position when the high-temperature component does not expand. Further, since the leaf spring 5 is elastically deformed with the housing fixing portion 54 as a fulcrum, when the high temperature component expands, a slight deviation occurs in the y direction (piping direction) and the leaf spring 5 moves by δy.

The deviation δy when the leaf spring 5 is elastically deformed is restricted only to the movement in the y direction by the rail-type uniaxial mount 4 arranged so that the direction of the mount axis is the y direction (piping direction). .. The deviation δy regulated in the y direction (piping direction) is allowed by the displacement of the uniaxial mount 4 in the piping direction. Therefore, bending stress is prevented from being applied to the connecting pipes 21 and 22 and the connecting members 31, 32 and 33.

It is preferable that the pair of leaf springs 5 have the same length l of the central portion 55 that causes elastic deformation and the angle θ provided between the component fastening portion 53 and the housing fixing portion 54. Further, it is preferable that the pair of leaf springs 5 have the same distance from the expansion center. Further, it is preferable that the spring constants of the leaf springs 5 are equal to each other. By satisfying these conditions, the deviation δy when the leaf spring 5 is elastically deformed becomes equal between the leaf springs 5, and the high temperature component easily moves on the rail of the uniaxial mount 4 when the leaf spring 5 is thermally expanded. ..

As described above, it is preferable that the deviation δy when the leaf springs 5 are elastically deformed is equal to each other in the leaf springs 5, but this is not always the case. The movable direction of the high temperature component is restricted only to the movement in the y direction by the rail type uniaxial mount 4 arranged so that the direction of the mount axis is the y direction (piping direction). Therefore, for example, even if the spring constants of the leaf springs 5 vary, the expansion center does not shift in the x direction (the direction at which the leaf springs 5 intersect at right angles to the piping direction). That is, even if the deviation δy when the leaf spring 5 is elastically deformed is different between the leaf springs 5, no stress is generated in the cross-sectional direction (x direction) in the connecting pipes 21 and 22, and the connecting members 31, 32, 33. ..

FIG. 6 is a view showing the inside of the housing when the uniaxial mount 4 and the leaf spring 5 are installed, and is a view seen from the side surface direction of the housing.

As shown in FIG. 6, the uniaxial mount 4 is arranged under the high temperature parts (fuel cell stack 2 and reformer 3), and the housing fixing member 42 is bolted to the bottom plate of the housing 1 via the bracket 424. It is fixed to the housing 1 by being fastened with. Further, in the uniaxial mount 4, the upper surface side of the component fixing member 41 and the bottom surface of the high temperature components (fuel cell stack 2 and reformer 3) in the housing 1 are fastened with bolts or the like. As a result, the uniaxial mount 4 is fixed to the housing 1 in a state where it can be displaced in the horizontal direction with respect to the high temperature component.

Further, as shown in FIG. 6, the leaf spring 5 is a high-temperature component (fuel cell stack 2 and) so that the width direction of the side surface of the leaf spring 5 coincides with the vertical direction (z direction in FIG. 6) with respect to the housing 1. It is placed at the bottom of the reformer 3). In the leaf spring 5, the component fastening portion 53 is fixed to the bottom surface of the high temperature component (fuel cell stack 2 and reformer 3) in the housing 1 by a bolt or the like via the bracket 52. Further, the leaf spring 5 is fixed to the housing 1 by fastening the housing fixing portion 54 to the side wall of the housing 1 with bolts or the like via the bracket 51. The leaf spring 5 is displaceably arranged in a horizontal direction with respect to the high temperature component and in a direction different from the displaceable direction of the uniaxial mount 4.

The leaf spring 5 elastically deforms in the direction toward the side surface (x direction in FIG. 1), but has a large moment of inertia of area in the vertical direction (z direction in FIG. 6). Therefore, the leaf spring 5 regulates the high temperature component from swinging in the direction perpendicular to the housing 1. When vertical vibration is applied to the fuel cell system 100, when the high temperature component swings in the vertical direction, the uniaxial mount has a dovetail shape and a dovetail groove, and the fuel cell system 100 is lifted or dropped, and noise is generated. On the other hand, in the present embodiment, since the leaf spring 5 regulates the vertical swing of the high temperature component, the uniaxial mount 4 is prevented from rising or falling between the dovetail type and the dovetail groove, and the noise is reduced. To.

As shown in FIGS. 1 and 6, there is a heat insulating material 6 that covers the entire high temperature component between the uniaxial mount 4 and the leaf spring 5 and the high temperature component (fuel cell stack 2 and reformer 3). It will be provided. The heat insulating material 6 is provided with a through hole, and the uniaxial mount 4 and the leaf spring 5 are fixed to the high temperature component and the housing 1 through the through hole.

Since the heat insulating material 6 is provided between the uniaxial mount 4 and the leaf spring 5 and the high temperature component in this way and the uniaxial mount 4 and the leaf spring 5 are arranged outside the heat insulating material 6, minimum heat retention is required. Only parts (high temperature parts) are kept warm. Therefore, the amount of the heat insulating material 6 used can be suppressed. Further, it is possible to prevent the uniaxial mount 4 and the leaf spring 5 from becoming excessively high in temperature while keeping the high temperature parts warm.

FIG. 7 is a diagram when the fuel cell system 100 of the present embodiment is mounted on the vehicle 7.

As shown in FIG. 7, the fuel cell system 100 is mounted on the vehicle 7 so that the displaceable direction of the leaf spring 5 coincides with the front-rear direction (x direction in FIG. 7) of the vehicle 7.

As described above, in the high temperature component inside the housing 1, the leaf spring 5 regulates the movement of the high temperature component in the mounting axial direction, and the uniaxial mount 4 regulates the movement of the high temperature component in the displacement direction line direction. However, in the case of the rail-type uniaxial mount 4 of the present embodiment or the uniaxial mount 4 using the shaft and the bearing in the second embodiment described later, the rail and the engaging member (the dovetail type / dovetail groove) and the shaft If there is a gap between the bearing and the bearing, slight vibration may occur in the gap and noise may be generated. That is, if there is a gap between the members constituting the uniaxial mount 4, noise may be generated by the gap when the uniaxial mount 4 vibrates. On the other hand, the leaf spring 5 does not have such a noise problem. In a general vehicle, the vibration in the vehicle width direction is usually larger than that in the front-rear direction of the vehicle. Therefore, by mounting the fuel cell system 100 on the vehicle 7 so that the displaceable direction of the leaf spring 5 coincides with the front-rear direction (x direction in FIG. 7) of the vehicle 7, the leaf spring 5 causes the high temperature component. Suppresses rocking in the vehicle width direction (y direction in FIG. 7). That is, by mounting the fuel cell system 100 in the above direction, it is possible to suppress the swing of high temperature parts due to the vibration in the vehicle width direction due to the regulating force due to the withstand force (rigidity) in the pulling direction and the buckling direction of the leaf spring 5. .. As a result, the movement of the uniaxial mount 4 in the vehicle width direction (y direction) can be suppressed, and the noise of the uniaxial mount 4 can be reduced.

Depending on the type of vehicle, the vibration in the front-rear direction of the vehicle may be larger than that in the vehicle width direction. In the case of such a vehicle, the fuel cell system 100 is mounted on the vehicle 7 so that the displaceable direction of the leaf spring 5 coincides with the width direction (y direction) of the vehicle 7. As a result, the regulation force due to the yield strength (rigidity) in the pulling direction and the buckling direction of the leaf spring 5 can suppress the swing of the high temperature component due to the vibration in the front-rear direction (x direction) of the vehicle 7. Therefore, the movement of the vehicle 7 of the uniaxial mount 4 in the front-rear direction can be suppressed, and the noise of the uniaxial mount 4 can be reduced.

According to the fuel cell system 100 of the first embodiment described above, the following effects can be obtained.

In the fuel cell system 100, the high temperature components (fuel cell stack 2 and reformer 3) housed in the housing 1 are a uniaxial mount 4 that can be displaced in only one direction and a leaf spring that can be displaced in only one direction. It is fixed to the housing 1 via the (elastic body) 5. Further, the uniaxial mount 4 and the leaf spring (elastic body) 5 are extended in the displaceable direction of each leaf spring (elastic body) 5 and each mount axis extended in the displaceable direction of each uniaxial mount 4. It is arranged so that each displacement direction line intersects at one point. Since the high-temperature parts thermally expand radially from the point where each mount axis and each displacement direction line intersect (expansion center), the uniaxial mount 4 in which the mount axis passes through the expansion center and the leaf spring (elasticity) in which the displacement direction line passes through the expansion center. In the body) 5, the displaceable direction of the uniaxial mount 4 and the leaf spring 5 and the direction of the expansion displacement coincide with each other. Therefore, the uniaxial mount 4 and the leaf spring 5 can allow the thermal expansion of the high temperature component inside the housing 1. In this way, since the displacement direction due to thermal expansion of the high temperature component can be controlled by arranging the uniaxial mount 4 and the leaf spring (elastic body) 5, it is possible to prevent an expansion stress from being applied to an unexpected portion. As a result, deterioration of system components can be suppressed, and deformation or damage of the components can be avoided.

Further, since the leaf spring (elastic body) 5 is displaceably arranged in a direction different from the displaceable direction of the uniaxial mount 4, the withstand force in the tensile direction and buckling direction of the leaf spring (elastic body) 5 ( Rigidity) regulates the movement of high-temperature components inside the housing 1 in the mounting axis direction. As a result, even when vibration in the direction in which the uniaxial mount 4 can be displaced is applied to the high temperature component, the proof stress of the leaf spring (elastic body) 5 can prevent the high temperature component from swinging. Similarly, since the uniaxial mount 4 is displaceably arranged in a direction different from the displaceable direction of the leaf spring 5, the high temperature component inside the housing 1 moves in the displacement direction line direction of the leaf spring 5. Is regulated. As a result, even when vibration in a direction in which the leaf spring (elastic body) 5 can be displaced is applied to the high temperature component, the uniaxial mount 4 can prevent the high temperature component from swinging. In this way, the leaf spring 5 regulates the swing of the high temperature component in the mounting axis direction, and the uniaxial mount 4 regulates the swing of the high temperature component in the displacement direction line direction, so that the fuel cell system 100 vibrates. Even if it is added, it is possible to suppress the swing of the high temperature parts housed in the housing 1. Therefore, it is possible to suppress the noise generated by the slight movement of the uniaxial mount 4 due to the swing of the high temperature component.

In the fuel cell system 100, the leaf spring (elastic body) 5 is arranged so as to be horizontally displaceable with respect to the high temperature component. Therefore, the leaf spring (elastic body) 5 is elastically deformed in the horizontal direction with respect to the high temperature component, but has a large moment of inertia of area in the vertical direction. Therefore, the leaf spring (elastic body) 5 regulates the movement of the high-temperature component in the direction perpendicular to the housing 1. Therefore, even when vertical vibration is applied to the high temperature component, the vertical vibration of the high temperature component of the uniaxial mount 4 is restricted. As a result, the uniaxial mount 4 is prevented from being lifted or dropped due to the vertical swing of the high temperature component, and the noise is reduced.

In the fuel cell system 100, the fuel cell stack (fuel cell) 2 and the reformer 3 which are high-temperature components supply fuel from the reformer 3 to the fuel cell stack (fuel cell) 2. It is connected by (connecting pipe) 21 and fixed to the housing 1 via a uniaxial mount 4 and a leaf spring (elastic body) 5, respectively. The uniaxial mount 4 and the leaf spring (elastic body) 5 for fixing the fuel cell stack (fuel cell) 2 to the housing 1 are arranged so that the mount axes and the displacement direction lines intersect at one point. Further, the uniaxial mount 4 and the leaf spring (elastic body) 5 for fixing the reformer 3 to the housing 1 are arranged so that each mount axis and each displacement direction line intersect at one point. Therefore, the fuel cell stack (fuel cell) 2 and the reformer 3 each form an expansion center. As a result, the fuel cell stack (fuel cell) 2 and the reformer 3 are individually allowed to expand thermally, and the thermal expansion between the housing 1 and the fuel cell stack (fuel cell) 2 and the reformer 3 is allowed. No thermal stress is generated even if there is a difference in expansion. As a result, it is possible to suppress deformation of the housing 1, the fuel cell stack (fuel cell) 2 and the reformer 3, and loosening of the fastening portion between the housing 1 and the fuel cell stack 2 and the reformer 3.

In the fuel cell system 100, a pair of uniaxial mounts 4 for fixing the fuel cell stack (fuel cell) 2 and the reformer 3 to the housing 1 are arranged. Each pair of uniaxial mounts 4 is arranged at positions facing each other, and is arranged so that the direction of the mount axis and the longitudinal direction (pipe direction) of the connecting pipes 21 and 22 coincide with each other. Further, a pair of leaf springs (elastic bodies) 5 for fixing the fuel cell stack (fuel cell) 2 and the reformer 3 to the housing 1 are arranged. The pair of leaf springs (elastic bodies) 5 are arranged at positions facing each other, and are arranged so that the direction of the displacement direction line and the direction intersecting the longitudinal directions of the connecting pipes 21 and 22 at right angles coincide with each other. Then, the mount axis of the uniaxial mount 4 and the displacement direction line of the leaf spring (elastic body) 5 intersect at a right angle at one point. In this way, since the direction of the mounting axis of the uniaxial mount 4 and the piping direction match, the deviation δy when the leaf spring (elastic body) 5 is elastically deformed is only moved in the piping direction by the uniaxial mount 4. Be regulated. The displacement δy regulated in the piping direction is allowed by the displacement of the uniaxial mount 4 in the piping direction. Therefore, bending stress is prevented from being applied to the connecting pipes 21 and 22 and the connecting members 31, 32 and 33. As a result, deterioration of system components can be suppressed, and deformation or damage of the components can be avoided.

Further, since the deviation δy when the leaf spring (elastic body) 5 is elastically deformed is restricted only to the movement in the piping direction by the uniaxial mount 4, the spring constant and size of each leaf spring (elastic body) 5 are restricted. Even if the shape varies, the expansion center does not shift in the direction perpendicular to the piping direction. That is, even if the deviation δy when the leaf spring (elastic body) 5 is elastically deformed is different between the leaf springs (elastic body) 5, the connecting pipes 21 and 22 and the connecting members 31, 32, 33 are in the cross-sectional direction. No stress is generated. Therefore, even if the spring constant, size, and shape of the leaf spring 5 vary, the expansion stress due to thermal expansion of the high-temperature parts applied to the connecting pipes 21 and 22 and the connecting members 31, 32, and 33 can be relaxed. Therefore, the degree of freedom in selection of the leaf spring 5 is improved, and the design of the leaf spring 5 becomes easy.

In the fuel cell system 100, since the arrangement of the uniaxial mount 4 and the leaf spring 5 allows thermal expansion of high-temperature parts inside the housing 1, an elastic mount such as a rubber material is used as in Patent Document 1. There is no need. An elastic mount made of an easily available material such as a rubber material cannot ensure the heat resistance of the mount. Therefore, it is necessary to provide a heat exchanger or the like in the system to cool the elastic mount such as the rubber material. Adding a heat exchanger in this way causes a problem that the system configuration becomes large. On the other hand, in the fuel cell system 100, since the metal uniaxial mount 4 and the leaf spring 5 are used, it is not necessary to cool them. Therefore, it is not necessary to use a heat exchanger, and the system can be downsized and the cost can be reduced.

In the fuel cell system 100, the uniaxial mount 4 and the leaf spring (elastic body) 5 pass between the high temperature component (fuel cell stack 2 and reformer 3) and the high temperature component (fuel cell stack 2 and reformer 3). A heat insulating material that covers the entire 3) is provided. Since the heat insulating material 6 is provided between the uniaxial mount 4 and the leaf spring (elastic body) 5 and the high temperature component in this way, and the uniaxial mount 4 and the leaf spring 5 are arranged outside the heat insulating material 6, the minimum is Only the parts that require limited heat retention (high temperature parts) are kept warm. Therefore, the amount of the heat insulating material 6 used can be suppressed. Further, it is possible to prevent the uniaxial mount 4 and the leaf spring 5 from becoming excessively high in temperature and causing a problem while keeping the high temperature parts warm.

In the fuel cell system 100, when the vibration in the width direction of the vehicle 7 is larger than the vibration in the front-rear direction of the vehicle 7, the displaceable direction of the leaf spring (elastic body) 5 coincides with the front-rear direction of the vehicle 7. It is mounted on the vehicle 7. As a result, it is possible to suppress the swing of the high temperature component due to the vibration in the vehicle width direction due to the regulating force due to the yield strength (rigidity) in the pulling direction and the buckling direction of the leaf spring (elastic body) 5. Therefore, the vibration of the uniaxial mount 4 can be suppressed. Therefore, the movement of the uniaxial mount 4 in the vehicle width direction can be suppressed, and the noise caused by the air gap between the members constituting the uniaxial mount 4 can be reduced. Therefore, the soundproofing material of the vehicle can be reduced.

In the fuel cell system 100, when the vibration in the front-rear direction of the vehicle 7 is larger than the vibration in the width direction of the vehicle 7, the displaceable direction of the leaf spring (elastic body) 5 coincides with the width direction of the vehicle 7. It is mounted on the vehicle 7. As a result, the swing of the high temperature component due to the vibration in the front-rear direction of the vehicle 7 can be suppressed by the regulatory force due to the yield strength (rigidity) in the pulling direction and the buckling direction of the leaf spring (elastic body) 5. Therefore, the movement of the vehicle 7 of the uniaxial mount 4 in the front-rear direction can be suppressed, and the noise caused by the uniaxial mount 4 can be reduced. Therefore, the soundproofing material of the vehicle can be reduced.

As described in the present embodiment, in the uniaxial mount 4 and the leaf spring 5, the mount axis is in the y direction, the displacement direction line is in the x direction, and the mount axis and the displacement direction line are at right angles at one point. It is preferable that they are arranged so as to intersect. Thereby, the movement of the high temperature component due to the deviation δy when the leaf spring 5 is elastically deformed can be regulated in each piping direction (y direction). However, the configuration is not necessarily limited to this, and if the uniaxial mount 4 and the leaf spring 5 are arranged so that the mount axis of each uniaxial mount 4 and the displacement direction line of each leaf spring 5 intersect at one point (expansion center). , The displaceable direction of the uniaxial mount 4 and the leaf spring 5 and the direction of expansion displacement coincide with each other. Therefore, for example, the uniaxial mount 4 and the leaf spring 5 may be arranged radially so that the mount axis of each uniaxial mount 4 and the displacement direction line of each leaf spring 5 intersect at one point (expansion center).

Further, in the present embodiment, the fuel cell stack 2 and the reformer 3 are fixed to the housing 1 by using two (pair) uniaxial mounts 4 and two (pair) leaf springs 5. However, the number of uniaxial mounts 4 and leaf springs is not limited to this. If the mount axis of each uniaxial mount 4 and the displacement direction line of each leaf spring 5 are arranged so as to intersect at one point (expansion center), for example, three or more uniaxial mounts 4 and / or leaf springs 5 are installed. Alternatively, only one uniaxial mount 4 and / or leaf spring 5 may be arranged.

Further, in the present embodiment, the uniaxial mount 4 is arranged so that the mount axis line coincides with the piping direction (y direction in FIG. 1), and the leaf spring 5 is arranged in the direction in which the displacement direction line intersects the piping direction at right angles (FIG. 1). It is arranged so as to coincide with the x direction of 1), but it is not necessarily limited to this. For example, the uniaxial mount 4 is arranged so that the mount axis intersects the direction perpendicular to the piping direction (x direction in FIG. 1), and the leaf spring 5 is arranged so that the displacement direction line coincides with the piping direction (y direction in FIG. 1). It may be arranged so as to.

Further, the leaf spring 5 does not necessarily have to be displaceably arranged in a direction different from the displaceable direction of all the uniaxial mounts 4, and is in a direction different from the displaceable direction of at least one uniaxial mount 4. It suffices if it is arranged so as to be displaceable.

Further, it is preferable to use a leaf spring 5 having heat resistance as the elastic body, but the present invention is not necessarily limited to this. For example, instead of the leaf spring 5, a rubber elastic body that can be displaced in only one direction may be used. In particular, when the elastic body is arranged outside the heat insulating material as in the present embodiment, an elastic body having not so high heat resistance can be used.

(Modification 1 of the first embodiment)
The fuel cell system 100 according to the first modification of the first embodiment will be described with reference to FIGS. 8 and 9. The same elements as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 8 is a view showing the inside of the housing of the fuel cell system 100 according to the first modification of the first embodiment, and is a view seen from the bottom surface of the housing 1. The first modification is different from the first embodiment in that the leaf springs 5 are offset and rotationally symmetrical with respect to the mount axis of the uniaxial mount 4.

As shown in FIG. 8, the pair of leaf springs 5 are arranged rotationally symmetrically in a state where the displacement direction lines intersecting the mount axis of the uniaxial mount 4 at right angles are deviated from each other by a distance d (offset state). Therefore, at the points that serve as the expansion centers of the fuel cell stack 2 and the reformer 3, the intermediate lines M ₁ and M _{2 of the} displacement direction lines of the pair of leaf springs 5 and the mount axes of the uniaxial mount 4 intersect at right angles. It can be made at two locations near the positions (points X and Y in FIG. 7).

FIG. 9 is a diagram illustrating deformation of the leaf spring when the high temperature component expands.

When the high-temperature component expands, the leaf spring 5 elastically deforms by δx in the x direction (the direction intersecting the piping direction at right angles) from the position when the high-temperature component does not expand. Further, since the pair of leaf springs 5 are arranged so as to be offset from each other by a distance d, when the high temperature component expands in temperature, the bracket 51 for fixing the component fastening portion 53 of the leaf spring 5 to the high temperature component is also a high temperature component. It is displaced in the y direction by δd as it expands. Further, since the leaf spring 5 is elastically deformed with the housing fixing portion 54 as a fulcrum, when the high temperature component expands, the leaf spring 5 also deviates by δy in the y direction (piping direction). The offset amount d is adjusted in advance by an experiment or the like so that the deviation δy and the displacement amount δd of the bracket 51 due to the offset amount d become equal. By adjusting the offset amount d in advance in this way, when the high-temperature component expands, only the expansion force in the elastically deformable direction (displaceable direction) acts on the leaf spring 5. That is, although the points that serve as the expansion centers are formed at two points near the points X and Y in FIG. 8, the temperature expansion of the high temperature component can be allowed by the uniaxial mount 4 and the leaf spring 5. Therefore, it is possible to prevent an expansion stress from being applied to unexpected parts (connecting pipes 21 and 22, connecting members 31, 32, 33, etc.), suppress deterioration of system components, and avoid deformation or damage of the parts. it can.

(Modification 2 of the first embodiment)
The fuel cell system 100 according to the second modification of the first embodiment will be described with reference to FIG. The same elements as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 10 is a view showing the inside of the housing of the fuel cell system 100 according to the second modification of the first embodiment, and is a view seen from the bottom surface of the housing 1. The second modification is different from the first embodiment in that the spring constants of the pair of leaf springs 5 are different.

As shown in FIG. 10, the high-temperature components (fuel cell stack 2 and reformer 3) housed in the housing 1 face a pair of uniaxial mounts 4 arranged to face each other in the y direction and face each other in the x direction. And are fixed to the housing 1 by a pair of leaf springs 5a and 5b having different spring constants.

One plate spring 5a is a spring constant k _a, the other plate spring 5b, the spring constant is larger k _b than ka. When the high temperature component expands in temperature, the reaction force due to the bending of the leaf spring 5b becomes larger than the reaction force due to the bending of the leaf spring 5a. Pushed in the direction. Therefore, the dovetail groove 414 of the component fixing member 41 fixed to the high temperature component in the uniaxial mount 4 is the dovetail type (extended portion) 422 of the housing fixing member 42 fixed to the housing 1. Press in the direction of arrow F. As a result, it is possible to prevent the dovetail type / dovetail groove (uniaxial mount 4) from swinging in the direction (x direction) intersecting the piping direction at right angles. That is, according to the above configuration, the leaf spring 5 not only regulates the movement of the high temperature component in the mount axis direction (y direction) due to the yield strength (rigidity) in the tensile direction and the buckling direction, but also is perpendicular to the piping direction. It also suppresses the slight movement of the uniaxial mount 4 in the direction of intersection (x direction). Therefore, the noise caused by the fine movement of the uniaxial mount 4 can be reduced.

As described above, the movable direction of the high temperature component is restricted only to the movement in the y direction by the rail type uniaxial mount 4 arranged in the y direction (piping direction). Therefore, the spring constant of the spring 5 is thus restricted. Even if there is a variation in the expansion center, the expansion center does not shift or rotate in the x direction (the direction at which the expansion center intersects the piping direction at right angles).

(Modification 3 of the first embodiment)
The fuel cell system 100 according to the third modification of the first embodiment will be described with reference to FIGS. 11 and 12. The same elements as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

11 and 12 are views showing the inside of the housing of the fuel cell system 100 according to the third modification of the first embodiment, FIG. 11 is a view seen from the side surface of the housing 1, and FIG. 12 is a view of the housing 1. It is a figure seen from the upper surface direction of. The third modification is different from the first embodiment in that a leaf spring 5'fixed to the upper surface of the housing 1 and the upper surface of the high temperature component is further provided.

As shown in FIGS. 11 and 12, a leaf spring 5'that fixes high-temperature parts (fuel cell stack 2 and reformer 3) to the housing 1 is fixed to the inner surface side of the upper surface 11 of the housing 1. .. One end (housing fixing portion 54') of the leaf spring 5'is fastened to the housing 1 by a bolt or the like so that the leaf spring 5'can be displaced in a direction perpendicular to the high temperature component (z direction in FIG. 11), and the other end (part). The fastening portion 53') is fastened to the upper surfaces 23 and 34 of the high temperature component by bolts or the like via the bracket 52'. In order to save space in the vertical direction (z direction) of the housing 1, it is preferable that one end of the leaf spring 5'(housing fixing portion 54') is fastened to the housing 1 without using a bracket. Not necessarily limited to this, it may be fastened to the housing 1 via a bracket.

The displacement direction line extended in the displaceable direction of the leaf spring 5'is the point where the displacement direction line of the pair of leaf springs 5 arranged horizontally with respect to the high temperature component and the mount axis of the pair of uniaxial mounts 4 intersect. Intersect with X and Y. That is, the points X and Y form the expansion center also in the present modification 3. Therefore, the leaf spring 5'can allow thermal expansion of the high temperature component in the vertical direction (z direction) due to the elastic deformation of the central portion 55'. Further, the leaf spring 5 and the leaf spring 5'are arranged so that the distance L from the expansion center is the same. As a result, the deviation δy when the leaf spring 5 and the leaf spring 5'are elastically deformed become equal, and when the leaf spring 5 and the leaf spring 5'are thermally expanded, the high temperature component easily moves on the rail of the uniaxial mount 4.

The leaf spring 5 and the leaf spring 5'are preferably arranged so that the distance L from the expansion center is the same, but the distance is not limited to this, and the distance from the expansion center may be different.

Even with the above configuration, the mount axis of the uniaxial mount 4, the leaf spring 5 and the displacement direction line of the leaf spring 5'intersect at one point (expansion center). The spring 5 and the leaf spring 5'can tolerate thermal expansion of high temperature components. That is, since the displacement direction due to thermal expansion of the high temperature component can be controlled by arranging the uniaxial mount 4, the leaf spring 5 and the leaf spring 5', it is possible to prevent an expansion stress from being applied to an unexpected portion even in the configuration according to the present modification 3. it can. As a result, deterioration of system components can be suppressed, and deformation or damage of the components can be avoided.

Further, the leaf spring 5'is elastically deformed in the vertical direction (z direction) with respect to the high temperature component, but has a large moment of inertia of area in the horizontal direction (x, y direction). Therefore, the leaf spring 5'regulates that the high temperature component swings in the horizontal direction with respect to the housing 1. Therefore, it is possible to reduce the noise generated by the uniaxial mount 4 (the dovetail type / dovetail groove) slightly moving in the horizontal direction due to the high temperature component swinging in the horizontal direction. On the other hand, the leaf spring 5 elastically deforms in the horizontal direction (x direction) with respect to the high temperature component, but has a large moment of inertia of area in the vertical direction (z direction). Therefore, the leaf spring 5 regulates the high temperature component from swinging in the direction perpendicular to the housing 1. Therefore, it is possible to suppress the vertical lift and fall of the uniaxial mount 4 (anticle type / dovetail groove) caused by the high temperature component swinging in the vertical direction, and it is possible to reduce the noise caused by the uniaxial mount 4. ..

(Second Embodiment)
The fuel cell system 100 according to the second embodiment will be described with reference to FIG. The same elements as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 13a is a schematic view of the uniaxial mount 4'in the fuel cell system 100 according to the second embodiment, and FIG. 13b is an assembly schematic view of the uniaxial mount 4'. The present embodiment is different from the first embodiment in that the uniaxial mount 4'is composed of the shaft 45 and the bearing 46.

As shown in FIG. 13a, the uniaxial mount 4'consists of a shaft 45, a first component fixing member 47, a second component fixing member 48, a bearing 46 supporting the shaft 45, and a housing fixing member 49.

The shaft 45 is made of a heat-resistant metal material, has a columnar shape, and extends in a direction parallel to the bottom surface of a high-temperature component housed in the housing 1. The shaft 45 is supported by a bearing 46, and both ends of the shaft 45 are joined to the first component fixing member 47 by welding or the like.

The bearing 46 is made of a heat-resistant metal material, and is fixed to the housing fixing member 49 by a fastening member such as a bolt on the bottom surface. The bearing 46 supports the shaft 45 in a state where it can be displaced in a direction parallel to the bottom surface of the high temperature component housed in the housing 1. In this way, the bearing 46 supports the shaft 45 in a state of being displaceable in a direction parallel to the bottom surface of the high temperature component, and the high temperature component fixed to the housing 1 via the uniaxial mount 4'is attached to the housing 1. On the other hand, the relative displacement in a direction other than the direction parallel to the bottom surface is restricted. That is, the bearing 46 supports the shaft 45 in a unidirectionally displaceable state.

The first component fixing member 47 is a plate-shaped member made of, for example, a stainless steel-based heat-resistant material, which extends in a direction perpendicular to the shaft 45 and is provided with a through hole. As shown in FIG. 13b, the shaft 45 is passed through the through hole to join the shaft 45 and the first component fixing member 47. The second component fixing member 48 is a plate-shaped member made of, for example, a stainless steel-based heat-resistant material, has a mounting surface 481 parallel to the shaft 45, and is housed in the housing 1 on the mounting surface 481. The high-temperature parts are mounted, and the high-temperature parts are fixed to the mounting surface 481 by fastening members such as bolts. The first component fixing member 47 and the second component fixing member 48 are fastened at the upper end of the first component fixing member 47 by a fastening member such as a bolt.

The housing fixing member 49 is a plate-shaped member made of, for example, a stainless steel-based heat-resistant material, and the bearing 46 is fastened on the upper surface by a fastening member such as a bolt. The bottom surface of the housing fixing member 49 is fastened to the housing 1 by a fastening member such as a bolt.

In this way, the uniaxial mount 4'can displace the shaft 45 fixed to the high temperature component in the housing 1 via the first component fixing member 47 and the second component fixing member 48 and the shaft 45 in one direction. It is composed of a bearing 46 that supports the bearing in a normal state. Further, the bearing 46 is fixed to the housing 1 via the housing fixing member 49. As a result, the uniaxial mount 4'fixes the high temperature component in the housing 1 to the housing 1 in a state where the uniaxial mount 4'can be displaced in only one direction.

As described above, in the uniaxial mount 4', the shaft 45 is passed through the through hole of the first component fixing member 47, and the shaft 45 and the first component fixing member 47 are joined. Therefore, as shown in FIG. 13b, the shaft 45, the component fixing members 47 and 48, the bearing 46 and the housing fixing member 49 can be separately manufactured and assembled, and the uniaxial mount 4'can be assembled. Can be configured more easily. Further, since the shaft 45 and the bearing 46 can be installed in the fuel cell system 100 in a state of being incorporated in advance, it can be managed in units of parts (individual uniaxial mount 4'), and uniaxial at the component manufacturing stage. The function of mount 4'can be pre-inspected.

According to the fuel cell system 100 of the second embodiment described above, the following effects can be obtained.

In the fuel cell system 100, the uniaxial mount 4'supports the shaft 45 fixed to the high temperature component housed in the housing 1 and the shaft 45 in a unidirectionally displaceable state (movable bearing) 46. The bearing (movable bearing) 46 is fixed to the housing 1. As a result, the shaft 45 and the bearing (movable bearing) 46 can be installed in the fuel cell system 100 in a state of being incorporated in advance. Therefore, it can be managed for each component (individual uniaxial mount 4'), and the function of the uniaxial mount 4'can be inspected in advance at the component manufacturing stage. Therefore, it is possible to more reliably prevent a situation in which a defect is found when the fuel cell system 100 is installed.

In the present embodiment, the uniaxial mount 4'is configured by using the shaft 45, the first component fixing member 47, the second component fixing member 48, the bearing 46, and the housing fixing member 49, but the present invention is not necessarily limited to this. Absent. If the uniaxial mount 4'is configured by a structure having a shaft fixed to a high temperature component and a bearing that supports the shaft in a unidirectionally displaceable state, the same as in the present embodiment even if other configurations are different. The effect of can be obtained.

(Third Embodiment)
The fuel cell system 100 according to the third embodiment will be described with reference to FIGS. 14 and 15. The same elements as those of the other embodiments are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 14 is a view showing the inside of the housing of the fuel cell system 100 according to the third embodiment, and is a view seen from the bottom surface direction of the housing 1. This embodiment is different from other embodiments in that a pantograph-shaped elastic body 5 ″ that can be displaced in the piping direction is used.

As shown in FIG. 14, the high temperature components (fuel cell stack 2 and reformer 3) are paired with each other in the piping direction (y direction in FIG. 14) and in the direction perpendicular to the piping direction (x direction in FIG. 14). A uniaxial mount 4 is arranged. Further, a pantograph-shaped elastic body 5 ″ that can be further displaced in the piping direction (y direction) is arranged outside the uniaxial mount 4 in the piping direction (y direction).

With the above arrangement, each mount axis of the uniaxial mount 4 and the displacement direction line of the elastic body 5 ″ intersect at a right angle at one point X and Y, respectively. Therefore, since the displaceable direction of the uniaxial mount 4 and the elastic body 5 ″ and the direction of the expansion displacement coincide with each other, the uniaxial mount 4 and the elastic body 5 ″ thermally expand the high temperature component inside the housing 1. Can be tolerated.

The pantograph-shaped elastic body 5 ″ may not be completely unidirectional in the displaceable direction (displaceable in a plurality of directions), but it is a uniaxial mount arranged in the x direction and the y direction. According to 4, the fastening point (bracket 51) between the elastic body 5 ″ and the high temperature component is restricted from moving in a direction other than the expansion / displacement direction. That is, since the displacement direction of the elastic body 5 ″ is regulated by the regulation of the displacement direction by the uniaxial mount 4, it is possible to prevent the expansion center from moving even when the high temperature component is thermally expanded.

15a is a side view of the elastic body 5 ″, FIG. 15b is a top view of the elastic body 5 ″, and FIG. 15c is a perspective view of the elastic body 5 ″.

The elastic body 5'' is formed in a pantograph shape by combining, for example, plate-shaped elastic members (leaf springs) made of a heat-resistant metal material, and as shown in FIGS. 15a to 15c, the first plate 56 and the second plate 56 and the second It has a plate 57 and.

The first plate 56 has a component fastening portion 53 ″, an elastic portion 55a, and an action point 58, which are portions to be fastened to high temperature components (fuel cell stack 2 and reformer 3). The component fastening portion 53 ″ is formed in the central portion of the first plate 56, and a hole 531 ″ is provided. The elastic body 5 ″ is fastened to the high temperature component through the hole 531 ″ through the hole 531 ″ via the bracket 51 (see FIG. 14) at the component fastening portion 53 ″. The point of action 58 is a portion connecting the first plate 56 and the second plate 57, and is formed at both ends of the first plate 56 and the second plate 57. The elastic portion 55a is a portion that causes elastic deformation formed between the component fastening portion 53 ″ and the point of action 58.

The second plate 57 has a housing fixing portion 54 ″, an elastic portion 55b, and an action point 58, which are portions to be fastened to the housing 1. The housing fixing portion 54 ″ is formed in the central portion of the second plate 57 and is provided with a hole 541 ″. In the housing 1, the extension frame 12 (FIG. 14) extends upward from the bottom plate to the vicinity of the bottom surface of the high-temperature parts (fuel cell stack 2 and reformer 3) at the location where the elastic body 5'' is arranged. See) is formed. The elastic body 5 ″ is fastened to the extension frame 12 of the housing 1 by a bolt or the like through the hole 541 ″ in the housing fixing portion 54 ″. The point of action 58 is a portion connecting the first plate 56 and the second plate 57, and is formed at both ends of the first plate 56 and the second plate 57. The elastic portion 55b is a portion that generates elastic deformation formed between the housing fixing portion 54 ″ and the point of action 58.

When the high-temperature component thermally expands, the action points 58 at both ends of the elastic body 5 ″ are displaced in the x direction (directions of arrows B and C in FIG. 15b) so as to move away from the component fastening portion 53 ″, and the component fastening portion 53 '' Is displaced in the y direction (direction of arrow A in FIG. 15b) due to elastic deformation of the elastic portion 55a. As described above, in the pantograph-shaped elastic body 5 ″, the point of action 58 is displaced in the x direction, so that the displacement deviation (δy) as in the case of using the leaf spring 5 does not occur. Therefore, even if the elastic body 5'' is arranged so as to be displaceable in the piping direction (y direction), the connecting pipes 21 and 22 and the connecting members 31, 32, 33 do not displace in the shearing direction (x direction in FIG. 14). Therefore, the stress on the connecting pipes 21 and 22 and the connecting members 31, 32 and 33 is relaxed.

Further, the elastic body 5'' formed by combining a plurality of leaf springs is inside the housing 1 due to the yield strength (rigidity) in the tensile direction and the buckling direction in the direction (x direction) intersecting the piping direction at right angles. It regulates the high temperature parts of the above from swinging in the x direction. Further, the elastic body 5 ″ has a large moment of inertia of area with respect to the vertical direction of the high temperature component. Therefore, the elastic body 5 ″ regulates the high temperature component from swinging in the direction perpendicular to the housing 1. In this way, the elastic body 5 ″ regulates the swing in the direction (x direction) at right angles to the piping direction of the high temperature component and the swing in the vertical direction. Therefore, the noise caused by the air gap between the members constituting the uniaxial mount 4 and the noise caused by the floating or falling between the dovetail type and the dovetail groove of the uniaxial mount 4 are reduced. Therefore, the soundproofing material of the vehicle can be reduced.

According to the fuel cell system 100 of the third embodiment described above, the following effects can be obtained.

In the fuel cell system 100, the uniaxial mount 4 and the elastic body 5'' that fix the high temperature parts (fuel cell stack 2, reformer 3) to the housing 1 have one point on each mount axis and each displacement direction line. Arranged so that they intersect at. Further, the elastic body 5 ″ has a pantograph shape and is arranged so that the displaceable direction and the piping direction (longitudinal direction of the connecting pipe) coincide with each other. In this way, since the elastic body 5 ″ that fixes the high temperature component to the housing 1 has a pantograph shape, the displacement of the elastic body 5 ″ does not deviate from the displacement direction line when the high temperature component thermally expands. .. As a result, even if the elastic body 5 ″ is arranged so as to be displaceable in the pipe direction, the connecting pipes 21 and 22, and the connecting members 31, 32, 33 are not displaced in the shearing direction, so that the stress on the pipe is relaxed. Therefore, it is not necessary to provide a displacement absorbing mechanism on the side of the external parts (auxiliaries) connected to the connecting members 31, 32, 33, and space saving and cost reduction can be realized.

In the present embodiment, the elastic body 5 ″ is arranged so that the displacement direction line and the piping direction (y direction) coincide with each other, but the present invention is not limited to this, and the pantograph-shaped elastic body 5 ″ is displaced. It may be arranged so that the direction lines intersect in the direction perpendicular to the piping direction (x direction). The pantograph-shaped elastic body 5 ″ does not deviate from the displacement direction line when the high temperature component is thermally expanded and displaced. Therefore, even if the elastic body 5 ″ is arranged so that the displacement direction line is in the x direction, the connecting members 31, 32, and 33 are not displaced in the shear direction, so that the same effect as that of the present embodiment can be obtained. ..

Further, the uniaxial mount 4 and the elastic body 5 ″ are preferably arranged so that each mount axis and each displacement direction line intersect at a right angle at one point of points X and Y, respectively, but this is not always the case. .. The uniaxial mount 4 and the elastic body 5 ″ can be displaced if the uniaxial mount 4 and the elastic body 5 ″ are arranged so that each mount axis and each displacement direction line intersect at one point (expansion center). The direction and the direction of expansion / displacement coincide with each other, and it is possible to prevent an expansion stress from being applied to an unexpected portion. As a result, deterioration of system components can be suppressed, and deformation or damage of the components can be avoided. Therefore, for example, the uniaxial mount 4 and the elastic body 5 ″ may be arranged radially so that each mount axis and each displacement direction line intersect at one point of points X and Y, respectively.

(Fourth Embodiment)
The fuel cell system 100 according to the fourth embodiment will be described with reference to FIG. The same elements as those of the other embodiments are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 16 is a view showing the inside of the housing of the fuel cell system 100 according to the fourth embodiment, and is a view seen from the bottom surface direction of the housing 1. This embodiment is different from other embodiments in that the expansion center is formed in the vicinity of the connecting pipe.

As shown in FIG. 16, one uniaxial mount 4a whose mount axis coincides with the piping direction (y direction in FIG. 16) and a mount are mounted on the bottom surface of each high temperature component (fuel cell stack 2 and reformer 3). A pair of uniaxial mounts 4b corresponding to the direction in which the axes intersect at right angles to the piping direction (x direction in FIG. 16) are arranged respectively. The pair of uniaxial mounts 4b are arranged so as to face each other so that the mount axes coincide with each other. Further, a pair of elastic bodies 5 ″ that can be displaced in the piping direction (y direction) are arranged on the bottom surface of each high temperature component (fuel cell stack 2 and reformer 3). The pair of elastic bodies 5 ″ are arranged so as to face each other so that the displacement direction lines coincide with each other.

The uniaxial mount 4a is arranged so that the mount axis line coincides with the piping direction (y direction in FIG. 16) and at a position between a pair (two) elastic bodies 5 ″. The pair of uniaxial mounts 4b is a connecting pipe 21 in a high temperature component so that the direction of the mount axis intersects the pipe direction at a right angle (x direction) and the mount axis passes in the vicinity of the connecting pipes 21 and 22. , 22 is located closer to. Therefore, the mount axis of the pair of uniaxial mounts 4a and the mount axis of the pair of uniaxial mounts 4b intersect at one point X', Y'near the connecting pipes 21 and 22.

Each of the pair of elastic bodies 5 ″ has a pantograph shape, the first plate 56 is fixed to a high temperature component via a bracket 51, and the second plate 57 is fixed to an extension frame 12 of the housing 1. The pair of elastic bodies 5 ″ are arranged so as to sandwich the uniaxial mount 4a so that the displacement direction line coincides with the piping direction (y direction). Further, the pair of elastic bodies 5 ″ are arranged so that the displacement direction line coincides with the mount axis of the uniaxial mount 4a. Therefore, each displacement direction line of the elastic body 5 ″, the mount axis of the uniaxial mount 4a, and the mount axis of the uniaxial mount 4b intersect at one point X ″, Y ′ near the connecting pipes 21 and 22. The points X'and Y'are the expansion centers of the fuel cell stack 2 and the reformer 3, respectively.

The pair (two) elastic bodies 5 ″ have different distances from the expansion center (points X ′ and Y ′), but because of the pantograph shape, the displacement direction line when the elastic bodies 5 ″ are displaced. Displacement deviation from the above (displacement δy of the leaf spring 5 in the first embodiment) does not occur. Therefore, even if the uniaxial mount 4 and the elastic body 5 ″ are arranged so that the expansion center is at a point near the connecting pipes 21 and 22, when the high temperature component thermally expands and the elastic body 5 ″ is displaced. The center of expansion does not shift. Therefore, it is possible to prevent an expansion stress from being applied to an unexpected portion.

Further, since the expansion center is located near the connecting pipes 21 and 22, the relative expansion displacement at the connecting portion between the fuel cell stack 2 and the reformer 3 is suppressed, and the high temperature parts are expanded to the connecting pipes 21 and 22. Stress is suppressed. Therefore, it is not necessary to provide the flexible portions 211 and 22 on the connecting pipes 21 and 22 for connecting the high temperature parts, and the connecting pipes 21 and 22 can be shortened.

According to the fuel cell system 100 of the third embodiment described above, the following effects can be obtained.

In the fuel cell system 100, the uniaxial mount 4 and the elastic body 5 ″ are arranged so that each mount axis and each displacement direction line intersect at one point near the connecting pipes 21 and 22. As a result, since the expansion center is formed in the vicinity of the connecting pipes 21 and 22, the relative expansion displacement at the connecting portion between the fuel cell stack 2 and the reformer 3 is suppressed, and the connecting pipes 21 and 22 are connected to the high temperature parts. The application of expansion stress is suppressed. Therefore, it is not necessary to provide the flexible portions 211 and 22 on the connecting pipes 21 and 22 for connecting the high temperature parts, and the connecting pipes 21 and 22 can be shortened. Therefore, the fuel cell system 100 can be further reduced in space and cost.

The elastic body 5 ″ in the present embodiment preferably has a pantograph shape because there is no deviation from the displacement direction line when displaced, but the elastic body 5 ″ is not necessarily limited to this, and the elastic body 5 ″ is, for example, It may be a leaf spring.

Further, in the present embodiment, the uniaxial mount 4 and the elastic body 5'' are arranged so that the mount axis and the displacement direction line intersect at a right angle at one point (expansion center) near the connecting pipes 21 and 22. Not limited to this. The uniaxial mount 4 and the elastic body 5 ″ may be arranged so that the expansion center is formed in the vicinity of the connecting pipes 21 and 22, for example, the uniaxial mount 4 and the elastic body 5 ″ are connected to the connecting pipe 21 and It may be arranged radially from the expansion center near 22.

Further, in the present embodiment, the uniaxial mount 4 and the elastic body 5 ″ are arranged so that the expansion center is formed in the vicinity of the connecting pipes 21 and 22, but the present invention is not limited to this, and the expansion center is the connecting pipe 21. The uniaxial mount 4 and the elastic body 5'' may be arranged so as to be formed on the, 22.

Further, in any of the embodiments, the housing 1 accommodates the fuel cell stack 2 and the reformer 3, and the fuel cell stack 2 and the reformer 3 are connected to each other in the housing 1, but it is not always the case. Not limited to this. For example, the housing 1 may be configured to individually accommodate each high-temperature component, and the high-temperature components may be connected to each other by a connecting pipe outside the housing 1.

Further, in any of the embodiments, the uniaxial mount 4 and the elastic body (leaf springs 5, 5', elastic) are formed so that the expansion center of the fuel cell stack 2 and the expansion center of the reformer 3 are formed at different points. Body 5'') is placed, but not necessarily limited to this. That is, the uniaxial mount 4 and the elastic body (leaf springs 5, 5', elastic body 5') are arranged so that the expansion centers of the fuel cell stack 2 and the reformer 3 are formed at the same point. May be good.

Further, in any of the embodiments, the mount axes of the uniaxial mount 4 and the displacement direction lines of the elastic bodies (leaf springs 5, 5', elastic body 5') intersect at one point (expansion center). However, this is not always the case. That is, each mount axis and each displacement direction line may intersect in the vicinity of a desired position. Even with such a configuration, the direction of expansion and displacement and the displaceable direction of the uniaxial mount 4 and the elastic body (leaf springs 5, 5', elastic body 5') are substantially the same, and the inside of the housing 1 It is possible to tolerate the thermal expansion of high temperature parts. Therefore, the displacement direction due to thermal expansion of the high temperature component can be controlled by arranging the uniaxial mount 4 and the elastic body (leaf spring 5, 5', elastic body 5''), so that expansion stress is prevented from being applied to an unexpected part. This makes it possible to suppress deterioration of system components and avoid damage to the components.

Although the embodiments of the present invention have been described above, the above embodiments are only a part of the application examples of the present invention, and the technical scope of the present invention is limited to the specific configurations of the above embodiments. Absent.

Moreover, although each of the above-described embodiments has been described as a single embodiment, they may be combined as appropriate.

1 Housing 2 Fuel cell stack (fuel cell) (high temperature parts)
3 Reformer (high temperature parts)
4 Uniaxial mount 5, 5'leaf spring (elastic body)
5'' Elastic body 6 Insulation material 7 Vehicle 21 Anode gas supply pipe (connecting pipe)
100 fuel cell system

Claims (13)

A fuel cell system comprising a housing that houses a fuel cell and a housing that includes at least one of a reformer that supplies fuel to the fuel cell.
At least one uniaxial mount fixed to the housing and displaceable in only one direction,
It comprises at least one elastic body, which is fixed to the housing and can be displaced in only one direction by elastic deformation.
The high temperature component housed in the housing is fixed to the housing via the uniaxial mount and the elastic body.
The elastic body is displaceably arranged in a direction different from the displaceable direction of at least one of the uniaxial mounts.
In the uniaxial mount and the elastic body, each mount axis extending in the displaceable direction of each uniaxial mount and each displacement direction line extending in the displaceable direction of each elastic body are at one point or near a desired position. Arranged so that they intersect at multiple points of
A fuel cell system characterized by that. The uniaxial mount is arranged so as to be horizontally displaceable with respect to the high temperature component.
The elastic body is displaceably arranged in a direction horizontal to the hot component and in a direction different from the displaceable direction of at least one of the uniaxial mounts.
The high temperature component is restricted from moving in the direction perpendicular to the housing and in the displacement direction of the uniaxial mount by the elastic body.
The fuel cell system according to claim 1. The elastic body is mounted on the vehicle so that the displaceable direction of the elastic body coincides with the front-rear direction of the vehicle.
The fuel cell system according to claim 2. The elastic body is mounted on the vehicle so that the displaceable direction of the elastic body coincides with the width direction of the vehicle.
The fuel cell system according to claim 2. The uniaxial mount is composed of a shaft fixed to the high temperature component housed in the housing and a movable bearing that supports the shaft in a unidirectionally displaceable state.
The movable bearing is fixed to the housing,
The fuel cell system according to any one of claims 1 to 4, wherein the fuel cell system is characterized. A heat insulating material that passes between the uniaxial mount and the elastic body and the high temperature component and covers the entire high temperature component is further provided.
The fuel cell system according to any one of claims 1 to 5, wherein the fuel cell system is characterized. The elastic body is a leaf spring.
One end of the leaf spring is fixed to the high temperature component, and the other end is fixed to the housing to fix the high temperature component to the housing.
The fuel cell system according to any one of claims 1 to 6, wherein the fuel cell system is characterized. The elastic body is formed in a pantograph shape by a plurality of plate materials including a first plate material fixed to the high temperature component and a second plate material fixed to the housing.
The fuel cell system according to any one of claims 1 to 6, wherein the fuel cell system is characterized. The high-temperature parts housed in the housing are the fuel cell and the reformer.
The fuel cell and the reformer are connected by a connecting pipe for supplying fuel from the reformer to the fuel cell, and via at least one uniaxial mount and at least one elastic body, respectively. Is fixed to the housing
The uniaxial mount and the elastic body for fixing the fuel cell to the housing are arranged so that each mount axis and each displacement direction line intersect at one point or at a plurality of points near a desired position.
The uniaxial mount and the elastic body for fixing the reformer to the housing are arranged so that each mount axis and each displacement direction line intersect at one point or at a plurality of points near a desired position.
The fuel cell system according to any one of claims 1 to 8, wherein the fuel cell system is characterized. The elastic body is formed in a pantograph shape and is arranged so that the displaceable direction and the longitudinal direction of the connecting pipe coincide with each other.
The fuel cell system according to claim 9. The elastic body is formed in a pantograph shape and is arranged so that the displaceable direction intersects the longitudinal direction of the connecting pipe at right angles.
The fuel cell system according to claim 9. In the uniaxial mount and the elastic body, each mount axis and each displacement direction line are at one point on the connecting pipe or near the connecting pipe, or at a plurality of points near a desired point on the connecting pipe or near the connecting pipe. Arranged to intersect at,
The fuel cell system according to any one of claims 9 to 11. A pair of the uniaxial mounts for fixing the fuel cell and the reformer to the housing are arranged.
Each pair of the uniaxial mounts is arranged at positions facing each other and arranged so that the direction of the mount axis and the longitudinal direction of the connecting pipe coincide with each other.
A pair of elastic bodies for fixing the fuel cell and the reformer to the housing are arranged.
Each pair of elastic bodies is arranged at positions facing each other, and is arranged so that the direction of the displacement direction line and the direction intersecting the longitudinal direction of the connecting pipe at right angles coincide with each other.
The mount axis of the uniaxial mount and the displacement direction line of the elastic body intersect at a right angle at one point.
The fuel cell system according to claim 9.

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