JPH0749265B2 - High-speed vehicle travel stabilizer and control method thereof - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling stabilizer for a high-speed vehicle, and more particularly to a traveling stabilizer for a high-speed vehicle that causes uniform air separation on the rear side of the vehicle and stabilizes the resistance. It is about.

[Conventional technology]

2. Description of the Related Art Conventionally, as a travel stabilizer for high-speed vehicles, the main focus has been on reducing running resistance and air resistance, and the shape of the leading portion of the vehicle has been a streamline shape with low air resistance. Also, especially
As a high-speed vehicle with an air resistance reduction structure, Japanese Patent Publication No. 57-60
As described in No. 170, the air blower or air compressor installed in the vehicle causes the air taken in from the upper part of the vehicle body to be evenly ejected from the outer wall of the vehicle body to the periphery of the vehicle body, and at the tail car to be ejected from the rear part of the vehicle body for high speed running. The structure was such that the frictional resistance with the air involved and the pressure resistance were reduced.

[Problems to be solved by the invention]

In the case of the former case in which the shape of the leading portion of the vehicle is a streamlined shape with low air resistance, the above-mentioned prior art has a problem in running stability because air separation on the tail side of the vehicle occurs unevenly. In the latter case, the boundary layer control method that stabilizes the air in the boundary layer in order to prevent the frictional resistance of air from acting on the vehicle body is a mechanically complicated and expensive vehicle.

As shown in FIG. 8 (a), with respect to a cylinder or a sphere, the separation that occurs in the low flow velocity region induces a large air resistance. Furthermore, it is known that the Karman vortex is emitted and vibrates greatly in the direction perpendicular to the flow. The same can be said for the streamline shown in (b), but it is when the axes of the stream and the streamlined object are completely parallel. In this case, the peeling point is located relatively downstream and the safety is good.

However, in the case of a vehicle or the like, it is difficult to perfectly match the running wind and the center axis of the vehicle.

When the central axis A of the streamlined object is not parallel to the flow direction as described above, a force F ₁ acts on the tail of the vehicle as shown in FIG. As a result, the central axis A shifts to A'and the central axis A
As in the case of, the shaft receives a force F ₂ and again induces vibrations in the direction of A ′ → A → A ′. (Self-excited vibration) In this case, the vibration vibrates at the natural frequency of the spring system between the vehicle body and the bogie, which deteriorates the running stability and increases the air resistance due to the backward vortex induced by the self-excited vibration. To do.

The present invention is for suppressing the above phenomenon in a streamlined vehicle.

An object of the present invention is to provide an inexpensive and simple traveling stabilizing device for a high-speed vehicle in which a stabilizing member that causes uniform air separation is disposed on the rear side of the vehicle in order to improve traveling stability during high-speed traveling. is there.

[Means for solving problems]

The above-mentioned object is that the vehicle body is composed of a parallel portion having a uniform vehicle body cross-sectional shape in the longitudinal direction and a streamlined portion continuous with the parallel portion and having a vehicle body cross-sectional shape reduced toward the vehicle end. A stable member is installed at a cross-sectional change position between the parallel portion and the streamlined portion, and the stable member has a cross-sectional shape that matches the vehicle body cross section of the parallel portion and is continuous with the vehicle body surface of the parallel portion. A stabilizer having an outer surface portion; a drive source for moving the stabilizer; and an extendable and retractable movable member for smoothly connecting the outer surface of the vehicle body and the surface of the stabilizer with the movement of the stabilizer. This is achieved by arranging the stabilizer on the vehicle body so as to be able to move back and forth from the cross-section change position of the vehicle body to the rear of the vehicle end.

[Action]

Since the stabilizing member provided at the rear portion of the vehicle body has a cross-sectional shape that matches the parallel portion of the vehicle body cross section and has an outer surface that is continuous with the vehicle body surface of the parallel portion, It is possible to form the outer peripheral surface of the vehicle body in a plane parallel to the running wind with the air flow, and further, by projecting the stabilizer toward the rear of the vehicle body at the changing position of the vehicle body cross section, the air flowing along the streamlined portion of the vehicle body Since the flow can be separated relatively upstream, the generation of large-scale Karman vortices is suppressed, self-excited vibration is prevented, and stability is improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, an air peeling plate 3 as a stabilizing member is provided on the vehicle body 1 on the front side or the rear side of the vehicle. First
The detailed structures of the air separation plates 3 located on the front side and the rear side of the figure are shown in FIGS. 2 and 3, respectively. In the figure, a recessed portion 2 ″ having a concave shape is provided on the outer periphery of the outer plate 2 near the vehicle body 1 where the cross section changes, and when the stable plate 3 ′ is housed, the stable plate 3 ′ and the outer surface 2 of the outer plate 2 are accommodated. The dent portion 2 ″ and the stabilizer plate 3 ′ are formed so that ′ is on the same plane, and the stabilizer plate 3 ′, the outer plate 2, the dent portion 2 ″, and the movable member (cover plate) which is expandable and contractible are hermetically sealed. In order to keep the closed space watertight, a seal member 10 'is provided at a portion where the stabilizer 3'and the outer plate 2 are in contact with each other, and further, in order to keep the closed space airtight, a dent is formed. A seal member 10 "is provided between the position 2" and compressed air is fed into the airtight holding portion for the sealed air through the supply pipe 6. The compressed air moves the stabilizer 3'in the front-back direction. As shown in FIG. 4, the sliding portion 7 (sliding metal fitting) is arranged on the plate 3 ′, and the dent of the outer plate 2 Guided by the rail 8 provided at the point 2 ″, the stabilizer 3 ′ slides only in the front-rear direction. When storing the stabilizer 3 ', when the compressed air in the closed space is discharged through the supply pipe 6, the spring 5 acts to slide the stabilizer 3',
It is stored. The storage method is not limited to the spring 5. For example, a compression spring may be provided on the opposite side of the spring 5 (not shown), or the supply pipe 6 ′ may be provided on the end face side of the recessed portion 2 ″.
It is also possible to store by compressed air.

FIG. 5 shows another embodiment of the present invention, in which a hydraulic cylinder is used as a drive source for sliding the stabilizer 3 '. According to this embodiment, by supplying or exhausting compressed air, the stabilizing plate 3'slides automatically in the front-rear direction of the vehicle, so that the resistance on the rear side is made small and stable as in the previous embodiment. Generate uniform air separation for
The running stability can be improved.

The air separating plate 3 composed of the above components is not limited to being mounted on the entire circumference of the vehicle body, but may be partially provided around the vehicle body.

A vehicle having a streamlined head is usually manufactured by a method in which a frame is made of aggregate and then an outer plate is attached. At this time, as shown in FIG. 6, the central axis A'of the tail streamlined portion is
It is difficult to manufacture parallel to the traveling wind B. Sixth
In the case of the state shown in the figure, the rear-tail central axis A'has directionality with respect to the traveling wind B, and therefore receives the force F ₁ . Then, the central axis of the tail portion shifts from A ′ to A ″ and further receives the force F ₂ .

By repeating this, the vehicle body induces self-excited vibration to lower the running stability, and aerodynamic resistance increases due to the effect of the large-scale separation vortex induced by the self-excited vibration.

According to the present invention, when the central axis A'of the rear portion is not parallel to the traveling wind B, the stabilizing member is installed on the parallel extension of the rear portion of the vehicle body as shown in FIG. As a result, since the rear central axis A'has directivity with respect to the traveling wind B, a small separated flow region of high frequency is generated from the vehicle body parallel part upstream of the region (relatively downstream) where self-excited vibration occurs. It is formed.

As a result, the generation of large-scale turbulent vortices or large-scale Karman vortices from the tail, which causes a decrease in running stability, is suppressed, so that running stability can be improved and large-scale It is also possible to suppress an increase in air resistance caused by the separated flow.

As described above, according to the present embodiment, by providing the air separation plate (stabilizing member), it is possible to reduce air resistance and generate uniform air separation for stabilization.
That is, the vehicle body shape on the front side is streamlined, and the air separation plate located on the rear side is operated from a predetermined speed, whereby the traveling stability can be increased, and an inexpensive and simple traveling stabilizer is provided. Can be configured.

〔The invention's effect〕

According to the present invention, the shape of the vehicle body located on the front side is a streamlined shape with little air resistance, and the increase in the air resistance is reduced on the vehicle body located on the rear side to cause uniform air separation that stabilizes. By providing the air separation member, the traveling stability can be increased, and an inexpensive and simple traveling stabilizing device can be configured.

[Brief description of drawings]

1 is a side view of a vehicle according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II of FIG. 1, FIG. 3 is a sectional view taken along the line II-II of FIG. 1, and FIG. Fig. 1 is a sectional view taken along the line III-III, Fig. 5 is a sectional plan view showing another embodiment of the present invention, Fig. 6 is a diagram showing an example of manufacturing a rear streamlined portion of a vehicle, and Fig. 7 is a sectional view. FIG. 8 is a diagram for explaining the operation of the present invention, FIG. 8 is an explanatory diagram of air flow separation, and FIG. 9 is a diagram showing a relationship of forces exerted by traveling wind on a streamlined vehicle body. 1 ... Car body, 2 ... Outer plate, 2 '... Outer surface, 2 "... Dent part, 3 ... Air separation plate, 3' ... Stabilizer plate, 4 ...
Movable member, 5 ... Spring, 6 ... Supply pipe, 7 ... Sliding part,
8 …… rail, 9 …… cylinder, 10 ′, 10 ″ …… seal member, 11 …… stabilizer plate, 12 …… driver, 13 …… mounting metal,
14 …… Injector, 15 …… Air release plate

Claims (1)

[Claims] 1. A vehicle body, wherein a parallel portion having a uniform vehicle body sectional shape in a longitudinal direction of the vehicle body, and a streamlined portion which is continuous with the vehicle body and has a vehicle body sectional shape reduced toward a vehicle end.
The stable member is installed at the cross-sectional change position between the parallel portion and the streamlined portion, and the stable member has a cross-sectional shape that matches the vehicle body cross-section of the parallel portion and the parallel portion of the parallel portion. A stabilizer having an outer surface portion continuous to the vehicle body surface, a drive source for moving the stabilizer plate, and expansion and contraction for smoothly connecting the vehicle body outer surface and the stabilizer surface with the movement of the stabilizer plate. A traveling stabilizer for a high-speed vehicle, comprising: a movable member that is freely movable, and the stabilizer is installed on the vehicle body such that the stabilizer can move back and forth from a cross-section change position of the vehicle body to a rear side of a vehicle end.