JP2007331486A - Sloshing control device of liquid tank for transportation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular liquid tank of simple and low-cost structure restricted in increase of the weight of the tank, and capable of restricting sloshing with vibration of a car body to prevent deterioration of durability of the tank due to sloshing and capable of restricting the noise. <P>SOLUTION: The vehicular liquid tank comprising partitions arranged in a direction at a nearly right angle against the axis of an inner cylinder part to divide the inside of the liquid tank into several chambers in the inner cylinder part inside a cylinder part of the cylindrical liquid tank is provided with a flow resistant part having an opening opened in a lower part of the partition to allow the liquid to flow and a projection part projecting from both the surfaces of the partition substantially at a right angle. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is applied to a fuel tank or the like, and is a sloshing in a liquid tank for transportation provided with an inner cylinder part of a liquid tank formed in a cylindrical shape and a partition wall disposed substantially perpendicular to the axis of the inner cylinder part. The present invention relates to a control device.

In vehicular fuel tanks, residual fuel is likely to evaporate in summer when the outside air temperature is high.
Technology that suppresses evaporation of fuel in the fuel tank, because stirring the remaining fuel with the injected fuel when injecting new fuel from the fuel inlet increases the amount of evaporation of the remaining fuel and causes air pollution. Many are provided.

One of them is the technique disclosed in Japanese Patent Application Laid-Open No. 10-89180.
In such a technique, a fuel discharge port of a fuel injection pipe penetrating the side of the fuel tank is disposed in the fuel tank, and the fuel tank is located below the fuel discharge port by means of a baffle. The upper fuel chamber and the lower fuel chamber are communicated with each other through a small-area communication hole. With this configuration, the fuel is abruptly injected when fuel is injected into the fuel tank. To prevent stirring.

JP-A-10-89180

  A fuel tank for automobiles has a structure in which a cylindrical tank having a circular or rectangular cross section is fixed to a vehicle body with a band. One or a plurality of partition walls are provided in the inner cylinder part of the inner cylinder part in a direction substantially perpendicular to the axis of the inner cylinder part, and the partition prevents the wall part vibration due to the deformation of the cylinder part or the vehicle body vibration. Swelling of the liquid level in the tank due to the movement of the fuel in the fuel tank and up and down dancing, that is, sloshing are suppressed.

Nonetheless, fuel tanks for large vehicles such as buses and trucks have a large tank capacity, which increases the action force due to sloshing on the tank side surface and partition wall surface due to vehicle vibration, etc. In addition to causing a decrease, noise due to sloshing increases.
If the plate thickness of the fuel tank is increased, the above-mentioned problem associated with sloshing can be solved to some extent, but there arises a problem that the weight of the fuel tank increases and the cost also increases.

  Further, in the technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 10-89180), when liquid fuel is injected into the upper fuel chamber from the fuel injection pipe, it passes through a number of communication holes formed in the baffle from the upper fuel chamber. Smooth movement to the lower fuel chamber prevents sudden agitation by the injected fuel even when the remaining fuel in the lower fuel chamber is hot. It does not prevent the swell of the liquid level in the tank or the up / down dance, that is, the sloshing. In addition, the fuel tank is partitioned vertically by a baffle member having a large number of communicating holes, and the fuel tank is horizontally partitioned by a plurality of partition walls, so the structure is complicated and the number of parts increases. Furthermore, the number of welded parts and machined parts increases, and the fuel tank becomes expensive.

  In view of the problems of the prior art, the present invention can suppress the increase in the tank weight with a simple structure and can suppress the sloshing due to the vibration of the vehicle body with the low cost structure, thereby reducing the durability of the tank due to the sloshing. An object of the present invention is to provide a vehicle liquid tank that prevents noise and suppresses generation of noise.

  The present invention achieves such an object, and a plurality of liquid tanks are disposed in an inner cylinder portion inside a cylinder portion of a liquid tank formed in a cylindrical shape in a direction substantially perpendicular to the axis of the inner cylinder portion. In a vehicle liquid tank having a partition wall partitioned into a chamber, an opening that is opened at a lower portion of the partition wall to allow liquid flow, and a protrusion that protrudes in a substantially perpendicular direction from both sides of the partition wall in the vicinity of the upper side of the opening. And a flow resistance portion having a portion (Claim 1).

In the present invention, the flow resistance portion is specifically configured as follows.
(1) The flow resistance portion is formed of a plate material in which the opening is formed in a lower portion of the partition wall, and the protruding portion is provided in the vicinity of the upper side of the opening and projecting in a substantially right angle direction from both surfaces of the partition wall. (Claim 2).
(2) The flow resistance portion includes the opening and the protruding portion made of a pipe material having an outer peripheral portion fitted to the partition wall and opened at both ends.
(3) The flow resistance portion includes a hole through which the liquid can flow through the opening and the projecting portion at both outer peripheral portions centering on the partition wall of the pipe material in which the outer peripheral portion is fitted to the partition wall and the both end portions are closed. (Claim 4).
(4) The flow resistance portion forms a communication hole, which is the opening for communicating the plurality of chambers, at a lower portion of the partition wall, and protrudes in a substantially perpendicular direction from both surfaces of the partition wall near the upper side of the communication hole. It is comprised by providing the provided protrusion member (Claim 5).

According to the present invention, the inner cylinder part inside the cylinder part of the liquid tank is provided with the partition wall arranged in a direction substantially perpendicular to the axis thereof, and the opening formed in the inner cylinder part is allowed to flow. Since a flow resistance portion having protrusions protruding substantially perpendicularly from both sides of the partition wall is provided in the vicinity of the upper side (Claim 1), it passes through the opening formed in the inner cylinder portion by the vibration of the liquid tank caused by the vibration of the vehicle body or the like. Since the liquid moves between the two chambers partitioned by the partition wall while generating a vortex at the tip of the protrusion, the amount of movement of the liquid through the opening is reduced due to the flow suppressing action associated with the formation of the vortex. The swell height of the liquid surface due to the movement of the liquid becomes small, and the occurrence of dancing up and down of the liquid is avoided, and sloshing is suppressed.
This reduces the collision energy of the liquid to the tank side wall and the partition wall, reduces the stress generated in the tank side wall and the partition wall due to the liquid collision, improves the durability of the liquid tank, and reduces sloshing. The accompanying noise can be reduced.

  Further, according to the present invention, the protruding portion protruding substantially perpendicularly to the lower portion of the partition wall serves as a reinforcing member for the partition wall, so that the plate thickness of the partition wall can be reduced and the rigidity of the partition wall by the formation of the protruding portion can be reduced. The improvement can prevent peeling of the welded portion between the partition wall and the tank outer wall, and can further reduce the tank weight by reducing the thickness of the tank outer wall.

  Further, according to the present invention, it is only necessary to provide an opening for flowing the liquid between both sides of the partition provided in the inner cylinder part inside the cylinder part of the liquid tank and a projecting part protruding in a substantially perpendicular direction from the lower part of the partition. Since an apparatus having an effect can be obtained, as compared with the one in which the inside of the tank is partitioned in the vertical direction by a baffle member having a plurality of communicating holes as in Patent Document 1 and the inside of the tank is horizontally partitioned by a plurality of partition walls, The structure is simple, the number of parts is small, and the number of parts to be welded and machined is extremely small, which makes the liquid tank low in cost.

  Further, in the present invention, the flow resistance portion is composed of a plate material in which the opening is formed in a lower portion of the partition wall, and the protruding portion is provided in the vicinity of the upper side of the opening and projecting in a substantially right angle direction from both surfaces of the partition wall. (Claim 2) Since the protruding portion of the flow resistance portion is configured by welding the plate material to the partition wall, the structure of the flow resistance portion is simple and lightweight, and the increase in the weight of the liquid tank is suppressed, Sloshing can be suppressed at low cost.

  In the present invention, if the flow resistance portion is formed of a pipe material having an outer peripheral portion fitted to the partition wall and opened at both ends (Claim 3), the flow resistance portion is provided so as to protrude from the partition wall in a substantially perpendicular direction. By making the pipe material an opening through which the liquid flows, the pipe material has a structure that serves as both an opening and a protrusion, and the flow resistance of the liquid flowing through the pipe material is reduced. This increases the sloshing suppression effect.

  Further, in the present invention, the flow resistance portion is configured by forming holes through which liquid can flow in both outer peripheral portions centering on the partition wall of the pipe material in which the outer peripheral portion is fitted to the partition wall and the both end portions are closed. (Claim 4), by making the flow resistance portion a pipe material having holes through which liquid can flow and closing both ends, the liquid flows through the holes formed in the outer peripheral portion of the pipe material; Thus, the flow resistance of the liquid flowing through the pipe material is further increased, and a greater sloshing suppression effect than that of the above-described configuration (Claim 3) is obtained.

  Further, in the present invention, the flow resistance portion is formed in the lower part of the partition wall with a communication hole which is the opening for communicating between the chambers partitioned by the partition wall, and from both sides of the partition wall in the vicinity of the upper side of the communication hole. If the projecting member is provided so as to project in a substantially perpendicular direction (Claim 5), the space between the two chambers partitioned by the partition wall while the liquid generates vortices both around the tip of the projecting member and at the edge of the communication hole. Since it moves, the action of suppressing the flow of the liquid accompanying the formation of the vortex is strengthened, and the effect of suppressing the large sloshing is obtained.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

FIG. 1 shows a cylindrical fuel tank according to a first embodiment of the present invention, in which (A) is a longitudinal sectional view, (B) is a sectional view taken along the line ZZ in (A), and (C) is a chamber. (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15b.
In FIGS. 1A and 1B, reference numeral 100 denotes a cylindrical fuel tank, which is configured as follows.
Reference numeral 2 denotes a cylindrical portion formed in a cylindrical shape. Reference numerals 1 and 1 denote end plates covering both ends of the cylindrical portion 2, and the outer periphery thereof is welded to both end surfaces of the cylindrical portion 2. Reference numeral 3 denotes a fuel stored in the fuel tank 100, and X denotes a static water surface of the fuel 3. In this example, the cylindrical portion 2 is a cylindrical fuel tank formed in a circular cross section, but the cylindrical portion 2 can be configured in any shape such as a rectangular shape, a square shape, or a polygonal shape.
Reference numeral 4 denotes a partition wall disposed in the center portion in the longitudinal direction of the cylindrical portion 2 and partitioning the inside of the fuel tank 100. The plate surface of the inner cylindrical portion 2z inside the cylindrical portion 2 is substantially perpendicular to the axis of the inner cylindrical portion 2z. It arrange | positions so that it may become a direction, and is weld-joined by this inner cylinder part 2z (4a and 4a are weld parts).

An opening 10 having a fixed height h from the inner cylindrical portion 2z is formed at a lower portion of the partition wall 4, and the two chambers 15a and 15b in the fuel tank 100 partitioned by the partition wall 4 are formed in the opening 10. It is communicated by.
Reference numeral 5 denotes an internal plate made of a plate material, which is welded to the lower end portion of the partition wall 4 (4b and 4b are welded portions), and protrudes by a certain length C in the longitudinal direction substantially perpendicular to the plate surface of the partition wall 4. Is formed. As shown in FIG. 1 (B), the internal component plate 5 extends to the inner cylindrical portion 2z in the width direction of the cylindrical portion 2, and is welded to the inner cylindrical portion 2z at both ends (5a, 5a is a welding part).

According to the first embodiment, the fuel passing through the opening 10 formed in the inner cylinder portion 2z due to the vibration of the fuel tank 100 due to the vibration of the vehicle body or the like causes the tip of the internal component plate 5 constituting the protruding portion. It moves between the two chambers 15a and 15b partitioned by the partition wall 4 while generating vortices at the part. As shown in FIGS. 1C and 1D, when the fuel moves from the chamber 15a to the chamber 15b, the vortex is generated as shown by the arrow Y in FIG. When moving from 15b to chamber 15a, a vortex is generated as indicated by arrow Y in FIG. The amount of fuel movement through the opening 10 is reduced by the flow restraining action accompanying the formation of the vortex, so that the swell height of the liquid level X due to the movement of the fuel is reduced and the occurrence of fuel up-and-down dancing is avoided. , Sloshing is suppressed.
Thereby, the collision energy of the fuel to the cylinder part 2, the end plate 1, the partition wall 4 and the like constituting the tank wall is reduced, and the tank of the cylinder part 2, the end plate 1, the partition wall 4 and the like accompanying the collision of the fuel. The stress generated on the wall can be reduced, the durability of the fuel tank 100 can be improved, and the noise associated with sloshing can be reduced.
5 (A) and 5 (B) are diagrams showing the results of comparative experiments of the effects of the present invention and the prior art, and the amplitude measurement of the liquid surface X of the fuel 3 when an excitation force is applied to the fuel tank 100. FIG. Results are shown. 5A shows the case where the height 10 of the opening 10 is h = 65 mm, FIG. 5B shows the case where h = 165 mm, A is the prior art, and B is the first embodiment of the present invention.
The structure of the prior art was implemented in the state where the opening 10 was formed in the lower part of the partition wall 4 and the inner material plate 5 was not present.
As apparent from FIGS. 5A and 5B, in the case of the first embodiment of the present invention indicated by line B, the height h of the opening 10 is wide at both h = 65 mm and h = 165 mm. The decrease in the liquid level vibration of the fuel tank 100 at the time of vibration is more conspicuous than the conventional technique indicated by line A in the vibration frequency range.

  Further, according to the first embodiment, the internal material plate 5 projecting substantially perpendicularly to the lower part of the partition wall 4 extends to the inner cylinder part 2z in the width direction of the cylinder part 2, and the inner cylinder at both ends. Since it is welded and joined to the portion 2z, it functions as a reinforcing member for the partition wall 4 so that the thickness of the partition wall 4 can be reduced and the rigidity of the partition wall 4 can be improved by the formation of the internal material plate 5. Separation of the welded portion 4a between the partition wall 4 and the cylindrical portion 2 can be prevented, and furthermore, the thickness of the cylindrical portion 2 can be reduced to reduce the tank weight.

Further, according to the first embodiment, the internal material plate that protrudes in a substantially perpendicular direction from the opening 10 for flowing the fuel between the both sides of the partition wall 4 provided in the inner cylinder portion 2z of the fuel tank 100 and the lower portion of the partition wall 4. 5 can be obtained by providing a device having an effect of suppressing sloshing as described above, so that the fuel tank is partitioned in a vertical direction by a baffle member having a plurality of communication holes as in Patent Document 1, and a plurality of devices are provided. Compared to a partition that partitions the fuel tank in the horizontal direction, the structure is simple, the number of parts is small, and further, the number of parts to be welded and machined is very small, and the fuel tank 100 is low in cost.
Further, since the internal material plate 5 is formed by welding a plate material to the partition wall 4, the structure of the internal material plate 5 constituting the flow resistance portion of the fuel becomes simple and lightweight, and the fuel tank 100 Slowing can be suppressed at low cost with a slight increase in weight.

2A and 2B show a cylindrical fuel tank according to a second embodiment of the present invention, in which FIG. 2A is a longitudinal sectional view (corresponding to FIG. 1), and FIG. 2B is a sectional view taken along line AA in FIG. (C) shows the generation of vortices when the fuel moves from the chamber 15a to the chamber 15b, and (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15a.
In this second embodiment, an internal material pipe 8 projecting substantially perpendicularly to the partition wall 4 along the lower portion of the inner cylinder portion 2z is installed at the lower part of the partition wall 4, The outer periphery of the material pipe 8 is fitted and welded to the partition wall 4 (4c and 4c are welded portions), and an opening 8b through which the fuel moves is formed inside the internal material pipe 8.
Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B, and the same members are denoted by the same reference numerals.

According to the second embodiment, the fuel that passes through the interior material pipe 8 (opening) as shown by the arrow in FIG. 2A due to the vibration of the fuel tank 100 due to the vibration of the vehicle body or the like constitutes the protrusion. The vortex Y is generated as shown in FIG. 2C because the vortex Y moves to the two chambers 15a to 15b partitioned by the partition wall 4 while generating a vortex at the entrance / exit end to the inside of the internal material pipe 8. When the fuel moves from the chamber 15b to the chamber 15a, a vortex Y is generated as shown in FIG. 2 (D), and the movement of the fuel through the internal material pipe 8 is caused by the flow suppressing action accompanying the formation of the vortex. The amount is reduced, and accordingly, the undulation height of the liquid surface X due to the movement of the fuel is reduced, and the occurrence of fuel up-and-down dancing is avoided, and sloshing is suppressed.
Thereby, the collision energy of the fuel to the cylinder part 2, the mirror plate 1, the partition wall 4 and the like constituting the tank wall is reduced, and the tank wall of the cylinder part 2, the mirror plate 1, the partition wall 4 and the like due to the collision of the fuel. Can be reduced, the durability of the fuel tank 100 can be improved, and noise associated with sloshing can be reduced.

  According to the second embodiment, the internal material pipe 8 projecting substantially perpendicularly to the lower portion of the partition wall 4 functions as a reinforcing member for the partition wall 4. In addition to being able to reduce the thickness, the rigidity of the partition wall 4 can be improved by forming the internal material pipe 8 to prevent the welded portion 4a from being separated from the partition wall 4 and the tube portion 2, and the thickness of the tube portion 2 can be reduced. Weight can be reduced.

  Further, according to the second embodiment, the internal material pipe 8 that allows fuel to flow between both sides of the partition wall 4 provided in the inner cylinder portion 2z of the fuel tank 100 is welded and joined to the lower portion of the partition wall 4 as described above. Therefore, the fuel tank is vertically divided by a baffle member having a large number of communicating holes as in Patent Document 1, and the fuel tank is horizontally partitioned by a plurality of partition walls. Compared to those, the structure is simple, the number of parts is small, and the number of parts to be welded and machined is extremely small, so that the fuel tank 100 is low in cost.

  Further, by forming an opening 8b through which the fuel flows inside the internal material pipe 8, the internal material pipe 8 has a structure that serves as an opening that is a fuel passage and a protrusion that suppresses sloshing. The flow resistance of the fuel flowing through the interior material pipe 8 increases, and the effect of suppressing sloshing increases.

3A and 3B show a cylindrical fuel tank according to a third embodiment of the present invention, wherein FIG. 3A is a longitudinal sectional view (corresponding to FIG. 1), and FIG. 3B is a sectional view taken along line BB in FIG. (C) is the CC sectional view taken on the line in (A).
In this third embodiment, an inner construction material pipe 9 projecting in a direction substantially perpendicular to the partition wall 4 along the bottom of the inner cylinder portion 2z is installed at the lower part of the partition wall 4, and the inner construction material pipe is provided. 9 is fitted to the partition wall 4 to be welded (11 and 11 are welded portions), and both ends of the internal material pipe 9 are closed. An opening 9c through which the fuel moves inside the internal material pipe 9 is formed.
The inner construction material pipe 9 is fixed to the bottom of the inner cylinder material 2z by welding.
Further, a plurality of (six in this case, six as shown in FIG. 3B) passage holes 9a are provided in the inner material pipe 9 in the circumferential direction respectively opening in the two chambers 15a and 15b in the fuel tank 100. Are formed in a plurality of rows (in this case, four rows as shown in FIG. 3A) to provide a fuel passage and a function of a protruding portion for suppressing sloshing.
Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B, and the same members are denoted by the same reference numerals.

According to the third embodiment, due to the vibration of the fuel tank 100 due to the vibration of the vehicle body or the like, the fuel from the one side chamber, for example, the chamber 15a is caused to flow from the inner construction material pipe 9 as shown by the arrow in FIG. From the passage hole 9a, it passes through the interior material pipe 9, and flows out from the passage hole 9a to the other chamber, for example, the chamber 15b. As a result, the fuel generates a vortex (an arrow Y in FIG. 3B) at the end of the passage hole 9a that is the inlet to the interior material pipe 9, and the outlet that is the exit from the interior material pipe 9 Since it moves between the two chambers 15a and 15b partitioned by the partition wall 4 while generating a vortex (arrow Y in FIG. 3C) at the end of the passage hole 9a, the flow suppression effect associated with the formation of the vortex The amount of movement of the fuel passing through the interior material pipe 9 is reduced. Therefore, the swell height of the liquid level X due to the movement of the fuel is reduced, and the occurrence of fuel up and down dancing is avoided, and sloshing is suppressed.
Therefore, the collision energy of the fuel to the cylinder portion 2, the end plate 1, the partition wall 4 and the like constituting the tank wall is reduced, and the tank walls of the cylinder portion 2, the end plate 1, the partition wall 4 and the like accompanying the fuel collision are reduced. Can be reduced, the durability of the fuel tank 100 can be improved, and noise associated with sloshing can be reduced.

  Further, according to the third embodiment, the internal material pipe 9 protruding in a substantially perpendicular direction to the lower part of the partition wall 4 functions as a reinforcing member for the partition wall 4, so that the plate thickness of the partition wall 4 is increased. The rigidity of the partition wall 4 can be improved by forming the internal material pipe 9 to prevent the welded portion 4a from being separated from the partition wall 4 and the tube portion 2, and the thickness of the tube portion 2 can be reduced. Tank weight can be reduced.

  Further, according to the third embodiment, the internal material pipe 9 that allows fuel to flow between both sides of the partition wall 4 provided in the inner cylinder portion 2z of the fuel tank 100 is welded and joined to the lower portion of the partition wall 4. Therefore, the fuel tank is vertically divided by a baffle member having a large number of communication holes as in Patent Document 1, and the fuel tank is horizontally divided by a plurality of partition walls. Compared to the case of partitioning, the structure is simple, the number of parts is small, and the number of parts to be welded and machined is extremely small, so that the fuel tank 100 is reduced in cost.

  Further, according to the third embodiment, since the flow resistance portion is constituted by the internal material pipe 9 having the passage hole 9a through which the fuel can flow and closed both ends, the fuel is supplied to the internal material pipe 9. Since the fluid flows through a plurality of small diameter passage holes 9a formed in the outer peripheral portion of the inner pipe, the flow resistance of the fuel flowing through the internal material pipe 9 is increased as compared with the above-described embodiments, and an even greater sloshing suppression effect is obtained. It is done.

4A and 4B show a cylindrical fuel tank according to a fourth embodiment of the present invention, in which FIG. 4A is a longitudinal sectional view (corresponding to FIG. 1), and FIG. 4B is a sectional view taken along line DD in FIG. (C) shows the generation of vortices when the fuel moves from the chamber 15a to the chamber 15b, and (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15a. (E) is a comparative example corresponding to (C).
In this fourth embodiment, a communication hole 13 is formed in the lower part of the partition wall 4 as an opening that communicates between the two chambers 15a and 15b. Thus, the projecting members 12a and 12b are welded and joined to the partition wall 4 in a substantially right angle direction (12c is a welded portion) to form a flow resistance portion.
Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B, and the same members are denoted by the same reference numerals.

According to the fourth embodiment, when the fuel passing through the communication hole 13 formed in the lower portion of the partition wall 4 moves from the chamber 15a to the chamber 15b due to the vibration of the fuel tank 100 due to vehicle vibration or the like (FIG. 4). (Shown in (C)), or when moving from the chamber 15b to the chamber 15a (shown in FIG. 4D), a vortex (arrow Y1) at the tip of the protruding members 12a and 12b constituting the protruding portion, and It moves between the two chambers 15a, 15b partitioned by the partition 4 while generating a vortex (arrow Y2) at the inner peripheral edge of the communication hole 13. The vortex Y1 in the upper part of the communication hole 13 where the moving fuel moves upward immediately after passing through the partition wall 4 becomes a strong vortex, but the fuel passing through the lower part of the communication hole 13 becomes a weak vortex (arrow Y2). . The amount of fuel movement through the communication hole 13 is reduced by the flow restraining action associated with the formation of such vortices (Y1, Y2). Therefore, the swell height of the liquid level X due to the movement of the fuel is reduced, and the fuel moves up and down. Is prevented, and sloshing is suppressed.
Thereby, the collision energy of the fuel to the cylinder part 2, the mirror plate 1, the partition wall 4 and the like constituting the tank wall is reduced, and the tank wall of the cylinder part 2, the mirror plate 1, the partition wall 4 and the like due to the collision of the fuel. Can be reduced, the durability of the fuel tank 100 can be improved, and noise associated with sloshing can be reduced.
Note that when the protruding members 12a and 12b are largely separated upward from the upper edge of the communication hole 13, as shown in FIG. 4 (E), the protruding member that becomes resistance when the fuel that has passed through the communication hole 13 flows upward. Since it is not easily affected by 12a and 12b, the vortex (arrows Y2 and Y3) is weak and the flow suppressing action is also weak.

  According to the fourth embodiment, the projecting members 12a and 12b projecting substantially perpendicularly to the lower part of the partition wall 4 function as reinforcing members for the partition wall 4, so that the plate thickness of the partition wall 4 is reduced. In addition to being able to reduce the thickness, the rigidity of the partition wall 4 can be improved by forming the protruding members 12a and 12b, thereby preventing the welded portion 4a from being separated from the partition wall 4 and the tube portion 2, and further reducing the plate thickness of the tube portion 2. The tank weight can be reduced.

  Further, according to the fourth embodiment, the communication holes 13 for allowing the fuel to flow between the both sides of the partition wall 4 provided in the inner cylinder portion 2z of the fuel tank 100 are formed in the partition wall 4 and substantially from the lower part of the partition wall 4. By providing the projecting members 12a and 12b projecting in the right-angled direction, an apparatus having the above-described effect of suppressing sloshing can be obtained. Therefore, a baffle member having a large number of communicating holes as in Patent Document 1 can be used in the fuel tank. Compared with the case where the fuel tank is partitioned in the vertical direction and the fuel tank is horizontally partitioned by a plurality of partition walls, the structure is simple, the number of parts is reduced, and the number of parts to be welded and machined is extremely reduced. Low cost.

  In addition, the fuel moves between the chambers 15a and 15b partitioned by the partition wall 4 while generating vortices around both the front ends of the projecting members 12a and 12b and the inner peripheral edge of the communication hole 13. The fuel flow suppression action is strengthened, and a large sloshing suppression effect is obtained.

According to the present invention, it is possible to suppress the increase in tank weight with a simple structure and to suppress the sloshing caused by the vibration of the vehicle body with a low-cost structure, thereby preventing the deterioration of the durability of the tank due to the sloshing and the noise. It is possible to provide a vehicle liquid tank that suppresses the occurrence of the above.
In the embodiment of the present invention, the fuel tank for vehicles has been described. However, the fuel tank can be used for a liquid storage layer for transporting liquid, such as a tank truck for transporting liquid or an oil tank for tanker.

The cylindrical fuel tank which concerns on 1st Example of this invention is shown, (A) is a longitudinal cross-sectional view, (B) is the ZZ sectional view taken on the line in (A). (C) shows the generation of vortices when the fuel moves from the chamber 15a to the chamber 15b, and (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15a. The cylindrical fuel tank which concerns on 2nd Example of this invention is shown, (A) is longitudinal direction sectional drawing (corresponding figure of FIG. 1), (B) is the sectional view on the AA line in (A). (C) shows the generation of vortices when the fuel moves from the chamber 15a to the chamber 15b, and (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15a. The cylindrical fuel tank which concerns on 3rd Example of this invention is shown, (A) is longitudinal direction sectional drawing (corresponding drawing of FIG. 1), (B) is a BB line sectional view in (A), (C ) Is a cross-sectional view taken along line CC in (A). The cylindrical fuel tank which concerns on 4th Example of this invention is shown, (A) is longitudinal direction sectional drawing (corresponding figure of FIG. 1), (B) is the DD sectional view taken on the line in (A). (C) shows the generation of vortices when the fuel moves from the chamber 15a to the chamber 15b, and (D) shows the generation of vortices when the fuel moves from the chamber 15b to the chamber 15a. (E) is a comparative example corresponding to (C). (A), (B) is a diagram which shows the comparative experiment result of the effect of this invention and a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 End plate 2 Cylinder part 2z Inner cylinder part 3 Fuel 4 Partition 5 Internal material plate 8 Internal material pipe 9 Internal material pipe 9a Passage hole 8b, 9c, 10 Opening 12a, 12b Protrusion member 13 Communication hole 15a, 15b Chamber 100 Fuel tank

Claims (5)

  A vehicular vehicle having an inner cylinder portion inside a cylinder portion of a liquid tank formed in a cylindrical shape and provided with a partition wall that is disposed substantially perpendicular to the axis of the inner cylinder portion and divides the interior of the liquid tank into a plurality of chambers. The liquid tank has a flow resistance portion having an opening that is opened at a lower portion of the partition wall and allows liquid flow, and a protrusion that protrudes in a direction substantially perpendicular to both surfaces of the partition wall near the upper side of the opening. A sloshing control device for a liquid tank for transportation.   The flow resistance portion is configured such that the opening is formed at a lower portion of the partition wall, and the projecting portion is formed of a plate material provided in the vicinity of the upper side of the opening and projecting in a substantially perpendicular direction from both surfaces of the partition wall. The sloshing control device for a liquid tank for transportation according to claim 1.   2. The sloshing control device for a liquid tank for transportation according to claim 1, wherein the flow resistance portion comprises the opening and the projecting portion made of a pipe material having an outer peripheral portion fitted to the partition wall and opened at both ends.   The flow resistance portion has a hole through which the liquid can flow in the outer peripheral portion on both sides centering on the partition wall of the pipe material whose outer peripheral portion is fitted to the partition wall and whose both end portions are closed. The sloshing control device for a liquid tank for transportation according to claim 1, wherein:   The flow resistance portion forms a communication hole, which is the opening for communicating the plurality of chambers, at a lower portion of the partition wall, and is provided in a substantially perpendicular direction from both sides of the partition wall near the upper side of the communication hole. The sloshing control device for a transport liquid tank according to claim 1, wherein the sloshing control device is provided by providing a protruding member.

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