Brake pad

 

(57) Abstract:

The invention relates to railway transport, in particular to the brake equipment of the traction rolling stock. Achieved when using the brake pads the result is increased reliability and performance brake pads. Brake pad contains a steel frame and cast-iron arched body, consisting of a main and profile plots. In the body of the pad by the working friction surfaces on the core plot laid one row Diablo inserts, made in the form of a cylindrical element with a longitudinal cut, covering the crest of the wheel tread. On the main plot laid rows of at least two groups of cylindrical inserts. In each group the centers of the three nearest inserts equidistant from each other and from the ranks of these inserts deployed relative to the longitudinal axis of the pad. The insert is made of ductile metal, for example steel. 10 C.p. f-crystals, 4 Il.

The invention relates to railway transport, in particular to the brake equipment of the traction rolling stock.

Known brake pad along.with. 1572889 61 H 1/00, 1988 (1) containing steel Carcassonne inserts, laid in rows in the body of the pad by the working friction surfaces, and ridge insertion profile area is made in the form of a cylindrical element with a longitudinal cut and installed in the Creek pads with the possibility of embracing and interaction with the crest of the wheel tread.

Known (1) the device is closest to the claimed technical essence and the achieved result.

However, in known (1) a technical solution inserts made of special cast iron with high hardness, and hence cause heavy wear surfaces of the wheels. In addition, the execution of inserts of the main site prismatic continuous surface friction affects the heat sink and contribute to the greater wear of friction pairs and reduce the braking force due to the reduction of the friction coefficient.

The task that sent the claimed invention is the creation of a new design and manufacturing technology brake pads with inserts.

The technical result that can be obtained from the use of the invention is to improve reliability and performance brake pads by increasing orbital frame, cast iron arched body, consisting of a main and profile plots made it a stream and is provided with inserts laid in rows in the body of the pad by the working friction surfaces, and ridge insertion profile area is made in the form of a cylindrical element with a longitudinal cut and installed in the Creek pads with the possibility of setting and interaction with the crest of the wheel tread, all inserts are made of ductile metal, while inserting the main body of the pad is made of cylindrical shape and placed groups, each of which centers the next three inserts equidistant from each other.

In addition, each group inserts the main plot pads may consist of six inserts, placed in two rows.

In addition, it is preferable that the abrasive material inserts exceeded the abrasiveness of the material body pads.

In addition, the stream profile plot pads laid four ridge insertion interval

i = (0,147 - 0,220) L,

where L is the length of the pad.

In addition, the width of the ridge is inserted may be

b = (0,23-0,25) (B,

where B is the full width of the pad.

In addition, LASS="ptx2">

In addition, each insert of the main site pads can be made with a diameter of d = (0,16-0,22) B

In addition, the distance C between the centers of the inserts of the main site pads

C = (0.104 G-0,12) L

In addition, the length l of the cylindrical insert the main plot pads

l = (0,91-0,93) H,

where H is the thickness of the pads.

In addition, the group inserts the main plot pads divides the period of the square

P = (0,3-0,36) S,

where S is the full working area of the pad.

In addition, the solid insert can be attached to a steel frame by welding, and the entire set is filled with iron to form a unified working surface of the pad.

In Fig.1 presents a General view of the pads.

In Fig. 2 shows the insert of the main site.

In Fig.3 shows the insert ridge area.

In Fig. 4 shows a block cross section a-a in Fig. 1.

Brake pad contains iron arcuate body 1 and a steel frame 2. The body consists of a main and profile sections 3 and 4 respectively. In the profile section 4 is performed, the stream 5. In the body of the pad by the working friction surfaces on the core plot 4 laid one row Diablo inserts 6 and snapline the pin to Shoe brakes. Working the friction surface of the Shoe consists of the surface 11 of the main section 3 and the surface 12 of the profile section 4. Ridge of the insert 6 is made in the form of a cylindrical element with a longitudinal cut and installed in the Creek pads with the possibility of setting and interaction with the crest of the wheel tread. Insert 6 and 8 are made of ductile metal. Insert 8 is made of cylindrical shape and placed groups of 7, each of which centers the next three inserts 8 equidistant from each other. The axis of the series of these inserts 8 are arranged at an angle to the longitudinal axis of the pad. Each group 7 inserts 8 of the main section 3 of the pad may consist of six inserts 8, as shown in Fig.1, placed in two rows, the axes of which are placed at an angle to the longitudinal axis of the pad, equal = 13o3o.

The abrasiveness of any material paste may exceed the abrasiveness of the material body pads. The preferred excess of the abrasiveness of the material of the inserts is not less than 2 times.

In the stream profile 5 section 4 pads laid four ridge of the insert 6 with the interval i = (0,147-0,220) L, where L is the length of the pad. The width of the ridge inserts = (0,23-0,25) In, where In is the full width of the pad. Square T of the working surface, the pads are made with a diameter of d = (0,16-0,22) Century The distance C between the centers of the inserts of the main site pads C = (0,10-0,12) L. Length 1 cylindrical insert the main plot of the pad 1 = (0,91-0,93) H, where H is the thickness of the pads. Group 7 inserts 8 main plot pads share a period of 13 square P = (0,3-0,36) S, where S is the full working area of the pad. Insert the brake pads can be attached to a steel frame by welding, and the entire set is filled with iron to form a unified working surface of the pad for securing the pin to the brake Shoe. Working the friction surface of the Shoe consists of the surface 10 of the main site and the surface 11 of the profile.

Insert 6 and 8 are made of ductile metal having a higher abrasion than the material of body pads.

The execution of inserts 6 and 8 in the body casting with these ratios provides continuous contact pads with the wheel of the locomotive over the entire width of the bandage without breaks, with the exception of the working surfaces of the tongue, preventing wear and "undercut" nuts.

When you commit inserts on a steel frame welding and casting set of cast iron in the body pads the ends of the cylindrical inserts 8 and oval profile grooves of the inserts 6 together with the body of the casting form RA the speaker 2 and a burst of 9 with a hole 10 for fastening pads wedge cotter form the back (mounting) surface of the pads when mounting it in the Shoe.

The operation of the brake pads is performed by pressing the working surface of the wheel tread of the locomotive, the resulting interaction provides elastic-plastic friction coefficient > 0,42. The conditions for the occurrence of elastic-plastic friction:

a) the body of the block is cast iron, hardness 197229 HB;

b) inserting a soft - steel, hardness HB 170;

C) the surface of the wheel tread - steel, hardness 195190 HB;

g) limit thermal stability pads with preservation of the specified coefficient of friction of not lower than 950oC.

Due to the proposed technical solution increases reliability and performance brake pads.

1. Brake pad containing a steel frame, cast-iron arched body, consisting of a main and profile plots, made stream and provided with inserts laid in rows in the body of the pad by rubbing the surface, and the ridge of the insert profile plot is made in the form of a cylindrical element with a longitudinal cut and installed in the Creek pads with the possibility of embracing and interaction with the crest of the wheel tread, characterized in that all bets are made of ductile metal, while inserting the main body of karasnodarsky from each other.

2. Brake pad under item 1, characterized in that each group inserts the main plot of the pad consists of six inserts, placed in two rows.

3. Brake pad under item 1 or 2, characterized in that the abrasive material of the inserts is greater than the abrasiveness of the material body pads.

4. Brake pad according to any one of paragraphs.1 to 3, characterized in that the stream profile plot pads laid four ridge insertion interval i = (0,147 - 0,220) L, where L is the length of the pad.

5. Brake pad according to any one of paragraphs.1 to 4, characterized in that the ridge in the insert width b = (0,23 - 0,25) B, where B is the full width of the pad.

6. Brake pad according to any one of paragraphs.1 to 5, characterized in that the area T of the working surface of the pad without inserts T = (4,6 - 6,9) t, where t is the surface area of the inserts.

7. Brake pad according to any one of paragraphs.1 - 6, characterized in that each insert of the main site pads are made with a diameter of d = (0,16 - 0,22) B.

8. Brake pad according to any one of paragraphs.1 to 7, characterized in that the distance C between the centers of the inserts of the main site pads C = (0,10 - 0,12) L.

9. Brake pad according to any one of paragraphs.1 to 8, characterized in that the length I of the cylindrical stamp.1 - 9, wherein the group of inserts main plot pads divides the period of the square P = (0,30 - 0,36) S, where S is the full working area of the pad.

11. Brake pad according to any one of paragraphs.1 to 10, characterized in that the insert is attached to a steel frame by welding, and the entire set is filled with iron to form a unified working surface of the pad.

 

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