JPH0522802A - Arc-retardant sliding board for electric vehicle - Google Patents

Abstract

PURPOSE:To suppress arc being produced on the sliding face of Fe group sintered alloy sliding board for electric vehicle. CONSTITUTION:The sliding board for electric vehicle has such structure as the pores at least the end part of the sliding face of a porous Fe group sintered basic alloy, crossing perpendicularly to the advancing direction, are impregnated with a conductive material of Cu or Cu alloy over a predetermined width and the remaining pores are impregnated with a lubricant of Pb or Pb alloy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric railing plate material in which arcs on a sliding surface are extremely small.

[0002]

2. Description of the Related Art Conventionally, as a sliding plate material (current collector) for an electric vehicle, as described in, for example, Japanese Patent Publication No. 63-65741, the pores of a porous Fe-based sintered alloy substrate are made of Pb or Pb alloy. Lead-impregnated Fe obtained by impregnating and filling the following lubricant
Many other materials are used, including base sintered alloys.

[0003]

On the other hand, with the recent increase in the speed of electric vehicles and the increase in the collecting current of the scraping plate, the arcing between the scraping plate material and the trolley wire increases in frequency and becomes more powerful. From this point of view, there is a strong demand for an electric railing plate material that generates as few arcs as possible, but the above conventional lead-impregnated Fe-based sintered alloy electric railing plate material must sufficiently meet this requirement. The current situation is that it is not possible.

[0004]

Therefore, the present inventors have
From the above viewpoints, as a result of research to develop an electric railing plate material with less arc generation on the sliding surface, the electric railing plate material is advanced on the sliding surface of the porous Fe-based sintered alloy substrate. The holes at the front end portion or at the front end portion and the rear end portion orthogonal to the direction are infiltrated and filled with a conductive material made of Cu or Cu alloy over a predetermined width, and the remaining holes of the base body are made of Pb. Alternatively, if the structure is such that it is impregnated and filled with a lubricant made of Pb alloy, even if it is running at a high speed, the leading end of the sliding surface or the conductive material infiltrated at the leading end and the rear end is used. Since the generation of an arc between the trolley wire and the trolley wire is significantly suppressed, it is possible to extend the service life and to obtain stable current collection. .

The present invention has been made on the basis of the above-mentioned research results, and is a front end portion, or a front end portion and a rear end portion of the porous Fe-based sintered alloy substrate which is orthogonal to the traveling direction on the sliding surface. Part of the holes has a structure in which a conductive material made of Cu or Cu alloy is infiltrated and filled over a predetermined width, and the remaining holes of the base are impregnated and filled with a lubricant made of Pb or Pb alloy. It is characterized by an electric railing plate material with less arcing.

[0006]

EXAMPLES Next, the electric railing plate material of the present invention will be specifically described by way of examples. As a raw material powder, 30 to 20
Cr powder having a predetermined particle size within the range of 0 mesh, F
e-Cr alloy (Cr: 60% content) powder, Fe-Mo alloy (Mo: 60% content) powder, Ni powder, Fe-P alloy (P: 25% content) powder, Fe-Mo-Si alloy (M
(O: 45%, Si: 10% content) powder, and Mo powder having an average particle size of 3 μm are prepared. After mixing with a mixer for 30 minutes, 5
Press-molded into a green compact at a predetermined pressure within the range of ~ 7 ton / cm ² , hold this green compact at 500 ° C for 30 minutes to degrease it, and then in an atmosphere of ammonia decomposition gas, 1100-1
Sintered at a predetermined temperature within a range of 200 ° C. for 1 hour and having the porosity shown in Table 1 and having substantially the same composition as the composition, and width: 25 mm × thickness S: 1
0 mm x length: Porous Fe-based sintered alloy substrates having dimensions of 80 mm are formed, then these substrates are placed flat in a heating furnace, and one end or both ends in the length direction of this substrate is formed. Each is made of Cu or Cu alloy of the material shown in Table 2 and has the same length of 80 mm.
The temperature was set to 11 in a methane-converted gas atmosphere with various rectangular rod-shaped conductive materials having different cross-sectional dimensions placed for the purpose of adjusting the infiltration ratio (shown by volume% of the whole substrate) into the substrate.
Infiltration treatment was carried out under the condition of holding at 00 ° C for 15 minutes, and
The conductive material having the infiltration ratio shown in Table 1 is infiltrated and filled into one end or both ends of the substrate, and then, in a nitrogen atmosphere.
Made of Pb or Pb alloy of the material shown in 5 and
The substrate is immersed in a bath of a lubricant heated to a predetermined temperature within the range of 00 to 700 ° C., impregnated under the condition of holding for 1 hour while applying a pressure of 8 kg / cm ² to the bath surface, Each of the electric railing plate members 1 to 10 of the present invention was manufactured by impregnating and filling the remaining holes of the above with the lubricant.

[0007]

[Table 1]

[0008]

[Table 2]

Next, an accelerated wear test was performed on the electric railing plate members 1 to 10 of the present invention obtained as a result. In the accelerated wear test, the center is fixed to the horizontal rotation shaft of the motor, and it is supported upright on one side of a disc with an outer diameter of 2.2 m. As a simulated trolley wire, the outer diameter is 2 m and the height is 15 mm.
Width: 5 mm hard copper ring (JIS / C1100 / BB-
H) is mounted with an eccentricity of 50 mm, and in the above-mentioned hard copper ring, two scraping plate materials are arranged at two locations on the diameter line in a state in which the length direction of the base body is aligned in the diameter direction of the hard copper ring. , Each of which is brought into surface contact with a pressing force of 5 kg, and a current of 100 A is passed between the hard copper ring and the contact plate material,
The rotation of the disc was increased to a rotation speed of 200 km / hr in 4 minutes, held at this speed for 5.5 minutes, stopped for 4 minutes as one cycle, and this was repeated 3 times. The specific wear amount and the wear depth of the simulated trolley wire as the mating material were measured. The result was converted into a value per 5000 revolutions of the simulated trolley wire, and shown in Table 2 as an average value of the two contact plate materials.

[0010]

As is apparent from the results shown in Table 2, the electric railing plate members 1 to 10 of the present invention are 13 to 18 × 10 ^-7 mm ³ / kg · mm in the wear test under almost the same conditions. It shows a certain amount of specific wear and the wear depth of the mating material is 35-53μ.
Compared with the above conventional lead-impregnated Fe-based sintered alloy electric railing plate material showing about m, the wear resistance is excellent and the opponent attacking property is remarkably small. It shows that it is extremely suppressed.

As described above, in the electric railing plate material of the present invention, the arc generation on the sliding surface is extremely small, so that the wear of the sliding surface and the wear of the trolley wire as the mating material are significantly suppressed even at high speed running. In addition, it enables stable current collection and exhibits excellent performance over a long period of time.

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[Procedure amendment]

[Submission date] August 23, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

The present invention has been made on the basis of the above-mentioned research results, and has a front end portion or a front end portion and a rear end portion which are orthogonal to the traveling direction on the sliding surface of the porous Fe-based sintered alloy substrate. Part of the holes has a structure in which a conductive material made of Cu or Cu alloy is infiltrated and filled over a predetermined width, and the remaining holes of the base are impregnated and filled with a lubricant made of Pb or Pb alloy. It is characterized by an electric railing plate material with less arcing. In addition, this invention
The base material that constitutes the electric railing plate material is the weight% (hereinafter, the composition
% Indicates% by weight), Mo: 3 to 15%,
Ni: 1 to 5%, Cr: 2 to 10%,
In addition, if necessary, Si: 0.5 to 3%, P:
0.3 to 1 %, S: 0.1 to 1%, or
Contains two or more kinds, and the rest is Fe and inevitable impurities.
And a porosity having a porosity of 7 to 30% by volume
It is desirable to use a high quality Fe-based sintered alloy. Also, the same
Cu alloy as a conductive material is Co: 1-5%,
Fe: 0.5-2%, Mn: 0.5-2%,
Sn: 1 to 10%, Zn: 0.5 to 2%, P
b: 1 to 40%, containing one or more of
However, the balance is C having a composition of Cu and inevitable impurities.
The use of u alloys is preferred. In addition, as a lubricant
All Pb alloys contain Sn: 1-60%, the balance
Is a Pb alloy having a composition of Pb and inevitable impurities
desirable.

Claims (2)

[Claims] 1. A porous Fe-based sintered alloy substrate, wherein pores at least at a front end orthogonal to a traveling direction on a sliding surface are
A conductive material made of Cu or a Cu alloy is infiltrated and filled over a predetermined width, and the remaining holes of the base body are Pb or P
An electric railing plate material with less arc generation, which has a structure of being impregnated and filled with a lubricant made of b alloy. 2. A porous Fe-based sintered alloy substrate has pores at both front and rear ends orthogonal to the traveling direction on the sliding surface, which are infiltrated with a conductive material made of Cu or Cu alloy over a predetermined width. The filled electric railing plate material according to claim 1, wherein the arc generation is small.