JPH04146870A - Rail oil applying device - Google Patents

Abstract

PURPOSE:To prevent a creaking noise generated by wheels of a train by installing a plural number of nozzles injecting a small amount of oil toward the head part upper surface of an inner rail on the side surface of the inner rail of a curved part, and by connecting an oil pump actuated intermittently by a timer or a train sensor to these nozzles. CONSTITUTION:This rail oil applying device installed on a roadway at the curved part entrance side has a plural number of nozzles 2 arranged on the side surface of an inner rail 1 of a curved part. Each of the nozzles 2 is installed diagonally upward on a diagonal plate 5 extending from a duct 4 fixed on the side surface of the inner rail 1 with specified intervals and its top edge is set in the position approximately 15mm lower than a head part upper surface 6 of the inner rail 1 so that it does not interfere with travelling of the train. And, each of the nozzles 2 is connected to an oil pump 3 through a piping 7 passing through the inside of the duct 4. This oil pump 3 is to be of a type to intermittently inject a specific amount of oil as a plunger pump, and it is controlled in motion by a timer or in accordance with output of a train sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a rail lubricating device installed to prevent the squeaking noise generated by the wheels of a train running on a sharp curve on a track.

(Prior Art) When a train passes over a curved track, the wheels generate an unpleasant noise called a squealing sound. This squeak noise is a problem, especially when there are private houses around the railway line, so conventionally soundproof wheels with press-fitted rubber have been used to prevent the above-mentioned squeak noise. However, since such soundproof wheels are much more expensive than ordinary rolling wheels, there is a problem in that the economic burden increases if measures to prevent squealing noise by using soundproof wheels are continued.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides a device that can prevent squealing noise when traveling on a sharply curved track without using soundproof wheels. It is complete.

(Means for solving one problem) In order to solve the above problem, the present inventors first studied the generation mechanism of the squealing sound. As a result, the wheel axle running on the curve is moved toward the east side of the curved outer track due to centrifugal force, and although the wheel set is able to pass through the curved road due to the difference in the outer diameter of the wheel tread slope, the wheel axle running on the sharply curved track is The inner, softer side of the wheel can no longer be covered by this difference in outer diameter alone, and when it rolls, it skids in the axial direction, causing lateral vibration between the wheel tread and the rail, and the 2000 to 5000 Hz sound generated during this vibration. It turned out that this resulted in an unpleasant squeaking sound. It was also confirmed that this squeaking noise does not occur when the amount of slippage is small due to a large curve radius, or when the space between the wheel tread and the rail is slippery, such as during rain.

The present invention was completed based on the above findings,
Attach multiple nozzles to the side of the inner rail in the curved section to spray a small amount of oil toward the top of the inner rail head.
The gist of this invention is a track oiling device characterized by connecting these nozzles with an oil pump that is operated intermittently by a timer or a train sensor.

The present invention will be explained in more detail below with reference to illustrated embodiments.

(Example) Fig. 1 is a diagram showing a rail lubricating device of an example installed on the track on the entrance side of a curved section, where (1) shows the inner rail of the curved section, and (2) shows the rail lubricating device installed on the side thereof. multiple nozzles,
(3) is an oil pump attached to the oil tank. Each nozzle (2) has an inner rail (1) as shown in the enlarged view in Figure 2.
a swash plate (5) extending from a duct (4) fixed to the side of the
The rails are installed diagonally upward at predetermined intervals, and their tips are connected to the inner rails (
It is installed at a position 15-lower than the top surface (6) of the head (1). Each nozzle (2) is connected to an oil pump (3) installed anywhere along the line via a pipe (7) passing through the inside of the duct (4).

The oil pump (3) is a type of pump that can inject a fixed amount of oil intermittently, such as a plunger pump, and for example, it can be activated by a timer every 30 minutes in winter or every 15 minutes in summer. and each nozzle (
A small amount of oil, for example about 0.2 cc, is squirted out from 2). The type of this oil is not particularly limited, but mineral-based wear-resistant hydraulic oil is preferably used, and the nozzle (2)
The oil injected from the inner raceway (1) is deposited on the top surface (6) of the head of the inner raceway (1). The actual adhesion rate was about 30 to 50%.

Furthermore, by connecting this oil pump (3) to a train sensor, oil can be injected when the train approaches the entrance side of a curved section. However, if the intervals between trains are short, there is a risk that oil may be spouted frequently, so a one-timer type is better.

(Function) The rail oiling device of the present invention configured as described above applies oil sent by the oil pump (3) to the inner rail (1) from the nozzle (2) attached to the side surface of the inner rail (1) in the curved section. 1), the head top surface (6) of the inner rail (1) is sprayed in small amounts at predetermined time intervals or each time a train approaches. The oil sprayed from the surface lubricates the surface and maintains a slippery state. Therefore, even when the soft inner wheel of the wheel axle rolling on a sharply curved track tries to skid sideways in the axial direction, lateral vibration does not occur between the wheel tread and the rail.
It is possible to prevent unpleasant squeaking sounds from occurring. Furthermore, since oil is not applied to the upper surface of the head of the outer rail, there is no problem with safe driving. In this way, the inner rail (
1) Applying oil only to the top surface of the head (6) to prevent the generation of squealing noise is unprecedented, and this eliminates the need to use expensive soundproof wheels as in the past. Also 2. It is possible to prevent squeaking noise when traveling on a curved track.

Note that the rail oiling device of the present invention has a curve radius of 160 mm, for example.
Although it is effective to provide this on lines with sharp curves of less than 100 m, it is also effective in cases where a squealing sound is produced on curves with a radius larger than this.

(Effects of the Invention) As explained above, the present invention improves the slippage of the wheel tread by attaching a nozzle that injects a small amount of oil toward the upper surface of the head of the inner rail on the side surface of the inner rail of the curved portion. It is possible to improve the noise of the train and prevent the squeaking noise when the train runs on a curved track, and it is economical because it does not require expensive soundproof wheels as in the past. Specifically, a train can take a sharp curve with a curve radius of 120m at a speed of 30km/I.
(When traveling at a speed of r, conventionally 100 to 110 db
However, when the device of the present invention is installed, it is possible to eliminate the high frequency band sound that causes the squealing sound, so the noise is reduced to 80 to 90, which is the same as when driving in a straight line.
db. In addition, the device of the present invention can be manufactured at low cost and uses very little oil.
It has the advantage of requiring little maintenance.

Therefore, the present invention makes an extremely large contribution to the industry and surrounding residents as a rail oiling device that solves the problems of the conventional technology.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main parts. (I) Bicurved inner rail, (2): Nozzle, (3): Oil pump, (6): Upper surface of the head of the inner rail.

Claims (1)

[Claims] A plurality of nozzles (2) that inject a small amount of oil toward the top surface (6) of the head of the inner rail (1) are installed on the side surface of the inner rail (1) in the curved part, and these nozzles (2) are An oil pump that operates intermittently by a timer or train sensor (
3) is connected to a rail oiling device.