JPS583855B2 - Sliding shoe with sliding surface temperature control function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport system that runs along a track, and which relies on sliding for support, guidance, or both, regardless of whether it is in a full speed range or a partial speed range. The present invention mainly relates to the structure of a sliding shoe that facilitates starting sliding in combination with a sliding track material made of a mesh material filled with various low-melting substances.

The coefficient of friction at the start of sliding in contact with the above-mentioned sliding track material is highly dependent on the temperature of the sliding surface, so the starting resistance differs in summer and winter, and in severe cold, the surface of the sliding track material may freeze. Moreover, it is also possible that the sliding material of the sliding shoe and the track material may freeze together, resulting in a significant increase in starting resistance.

As a means to reduce this starting resistance, it is thought to be effective to melt the low-melting point substances that make up the track material, and for this purpose there is a method of heating the sliding track material, but heating the sliding shoe side Not only is the heating method smaller and simpler, and is expected to result in less power loss when using electric heating, for example, but it is also expected that the friction coefficient and 1, and it has been experimentally confirmed that the wear of the sliding track material is smaller than that of the sliding track material heating method, so we propose a sliding shoe that has a sliding surface temperature control function that mainly uses heating. It is something.

Figure 1 illustrates the results of the experiment.

In this example, molybdenum is used as the sliding material on the sliding shoe side.
As a sliding track material, a composite material made of a 12-ply woven mesh material made of a single polyester fiber filled with paraffin wax and a low melting point alloy was used to simulate the low speed at the start of sliding, and the sliding speed was /min, surface pressure 5kg/cm2
These are the results of a friction test conducted with the addition of

Curve A shown in FIG. 1 shows the friction coefficient with respect to the temperature of the friction surface when the sliding material is heated, and curve B shows the friction coefficient with respect to the temperature of the friction surface when the sliding track material is heated.

Curve C shows the ratio of the amount of wear of the sliding track material when the sliding track material is heated to the amount of wear of the sliding track material when the sliding track material is heated.

From the curves A, B, and C, it is clearly known that heating the sliding material is more advantageous than heating the sliding track material since both the coefficient of friction and the wear of the sliding track material are smaller.

Embodiments of the present invention proposed based on the above experimental results will be described with reference to the drawings.

FIG. 2 shows a side view including a partial cross section of the embodiment, and FIG. 3 shows a cross section taken along the line A--A in the previous figure.

In both figures, reference numeral 1 denotes a sliding material made of molybdenum or titanium with surface nitriding treatment, which is in contact with the electric heater 2 and is assembled together with the heater 2 to the heat insulating support plate 3 with sliding material fastening screws 5.

The heat insulation support plate 3 is made of titanium or FRP using the frame assembly screws 6.
It is fixed to a frame body 4 made of a strong and lightweight material such as.

At the center of the central horizontal member 4a of the frame 4, there is a heat insulating pipe 8 that passes through the heat insulating support plate 3 and the electric heater 2 and reaches the sliding material 1.
A signal conductor 7a for obtaining an electrical signal from a temperature sensor 7 such as a thermocouple for temperature measurement attached to the center of the sliding material 1 and a wiring 2a for power supply to the electric heater 2 are drawn out through this interior. .

The frame body 4 has a pair of left and right protrusions, and assembly holes 4b formed in these protrusions are used to connect the frame body 4 when it is constructed as a sliding leg.

When the low melting point substance filled in the mesh material constituting the sliding track material is paraffin wax, the temperature of the sliding surface is about 10 to 40 degrees Celsius added to the melting point temperature of paraffin wax, and if the low melting point substance is In the case of a melting point alloy, the optimum range is the melting point temperature plus 0° C. to 10° C., which is maintained by controlling the power supply to the electric heater 2.

Applicable electricity! IIM] is a current predictive control based on the rate of rise and fall of temperature calculated based on the temperature detected by the temperature sensor 7 mentioned above, and the maximum value allowed for the sliding track material is stored as the upper limit temperature value of the control target. By using this system, it is possible to maintain the running surface at an appropriate temperature at all times without overheating and damaging the track material.

As described above, the sliding shoe configured as described above is such that the heat generated by the electric heater 2 is difficult to pass through to anything other than the sliding surface of the sliding material 1, and the energization to the electric heater 2 is controlled based on the signal generated by the temperature sensor 7. This makes it possible to maintain the sliding surface at an appropriate temperature with minimal heat loss using the minimum amount of power required. It is possible to start with small frictional resistance even in severe cold, and it is possible to realize gliding with less wear on the gliding track material.

[Brief explanation of drawings]

Fig. 1 is a diagram illustrating the results of experiments that are the basis of the present invention, Fig. 2 is a side view of an embodiment of the present invention including a partial cross section, and Fig. 3 is a cross section taken along the line A-A in Fig. 2. It is a diagram. 1... Sliding material, 2... Electric heater, 2
a...Power supply wiring, 3...Insulation support plate, 4...Frame body, 4a...Central horizontal member,
4b... Assembly hole, 5... Sliding material fastening screw, 6... Frame assembly screw, 1...
Temperature sensor, 7a...Signal conductor, 8...
・Insulated pipe.

Claims (1)

[Claims] 1. An electrically insulated electric heater is placed in contact with the surface of the sliding material other than the sliding surface, and the surface of the electric heater that is not in contact with the sliding material is covered with a heat insulating material, and the sliding temperature of the sliding material is By incorporating a temperature sensor that detects the temperature and a conductor that outputs the signal, it is possible to obtain the optimal runway surface temperature by using the detected temperature signal of the runway as input and controlling the energization of the electric heater. Gliding shoe with control function.