chevron, clouth & conical springs -...

Primary Suspension

SpringsChevron, Clouth

& Conical Springs

2 vulcanite Primary Suspension 3

Application

Vulcanite Chevron Springs are installed in a number of service applications including LRV’s, Electric Multiple Units (EMU’s), Electric Locomotives and Track Maintenance vehicles.

Features

Chevron Springs provide three modes of travel for axlebox primary suspensions. The suspension properties are achieved by fitting the springs in a vee formation and with shear and compression compliance within the rubber elements. Improved ride characteristics are provided with the advantages of simplicity, long service life and low maintenance costs. Abutting end plates can be produced in light alloy to match with similar material interfaces at the axlebox or vehicle frame. The included angle of the chevron plates can be varied between 90 deg. and 140 deg. at the design stage thereby allowing stiffness characteristics to be optimised to suit bogie designers.

The rubber layers in the spring are loaded in shear and compression by fitting them at an angle inclined to the vertical axis. Values quoted for lateral and longitudinal stiffness may vary with vertical deflection. The longitudinal stiffness value applies when the elastic centre of the two Chevron springs is at the journal centre height. If the elastic centre is above or below the centre of the journal, the longitudinal stiffness at the journal will be less than the value quoted. Vulcanite springs may be fitted to two bearing or single self-aligning bearing axleboxes. For stability with self aligning bearings, the elastic centre of the Chevron springs in their laden position should not be above the journal centre height.

The temperature at the axlebox faces adjoing the Chevron springs should not exceed 60 degrees C. A typical force diagram is shown below.

Spring Fixing Chevron Springs are manufactured with different methods of locating on axleboxes as shown in the diagram, such as edge located (A), spigot located (B) or welded tab (C). Location on the bogie frame is normally on the plate edge. Springs can be supplied with brackets for direct and easy fitting to the bogie frame (D).

Chevron SpringsSprings listed on the following pages are classified in the order of the number of plates used in a chevron and then in terms of deflection capacity followed by load capacity.

The Chevron springs listed are a selection from the Vulcanite range. New designs can be produced to suit special requirements, including bracketed versions preferred rubber hardness and installation included angles (A).

The diagram shows overall and fitting dimensions only. It is recommended that a drawing of the product is obtained before ordering.

Chevron Spring Details

Part No. Steel Plates

Angle (Ao)

Dimensions (mm) Vertical Load per Chevron

(kg)

Max Def (mm)

Fixture TypeH Wt Wb L Lt Lb

503.232.158.055.002 3 120 63.5 158 120 232 181 209 1800-3000 11.5 B

503.205.100.079.001 3 120 54.8 100 100 205 185 185 1850 20 A

504.305.148.129.002 4 120 90.8 148 148 305 243 243 2000 26 C

504.305.148.129.003 4 120 90.8 148 148 305 243 243 2000 13 C

504.325.143.109.001 4 120 109 130 143 325 251 260 1926 41.2 C

504.325.130.109.001 4 120 109 130 143 325 251 260 2150 33.25 B

504.307.160.082.001 4 120 93.3 161 161 307 258 258 1780 21.5 B

504.295.169.097.001 4 106 96.4 169 132.4 295 189 270 500-1200 12.8 C

504.263.120.095.001 4 120 95 120 120 263 200 212 1570 30 C

504.263.120.095.002 4 120 95 120 120 263 200 212 2140 30 C

504.255.150.093.001 4 120 92.4 150 150 275 225 255 2380 37 C

504.228.179.076.001 4 120 87.2 179 140 228 171 191 890-2200 16.5-21 B

505.218.203.115.001 4 120 115 203 146 218 127 178 2038 36-44 C

505.248.181.118.001 4 120 116.6 181 137 285 194 248 2400 40 B

505.261.181.116.001 5 120 116 181 139 259 169 221 2000 40 B

505.263.136.094.001 5 120 95 136 120 263 200 213 2340 30 C

505.285.200.115.001 5 120 115.5 181 149 285 194 248 1500 30 C

505.306.120.092.001 5 120 106.5 136 120 306 260 250 2500 32 C

505.315.136.109.001 5 120 109 136 120 315 259 260 2500 42.5 C

506.353.245.122.001 6 106 152.8 245 180 353 230 305 1000-4000 35.5 B

506.298.204.180.001 6 120 150 208 126 298 178 241 3060 55 B

507.362.260.166.001 7 120 166 260 186 362 224 266 2850 51-60 B

507.362.260.193.001 7 120 193 260 182 362 233 266 2850 48-55 B

A B C D


Application

Clouth-springs are vibration dampening elements consisting of a rubber ring (dounut), contained between a tapering metal pin (mandrel) and a metal housing (pot). The main attraction of this spring is its ability to permit simple and light frame bogie design, which is often used in suburban cars. These can be used for replacements of helical springs on existing bogies.

Features

Their metal parts and the rubber ring are assembled together rather than bonded. The rubber is stressed in compression, shear and torsion. The deformation of the circular cross section ring along the lines results in tensile and compressive stresses applied along the surfaces whist tangential stresses apply at the circumference and torsional stresses at the cross section. Clouth-springs are used as primary suspensions for dampening vibrations in rail vehicles. The characteristics of roller-springs can be varied as required within their permissible capacity.

The possibilities offered to ensure the desired characteristics by altering the shape of the housing (pot) and the centre pin (mandrel) are shown below:

In addition to supplying brand new, Vulcanite also has capability in overhauling old, used or damaged Clouth springs that have reached its service life. Since there are no bonded parts the springs can be disassembled, the metal components reclaimed and the rubber ring replaced. The spring is then assembled and tested to the acceptance criterion as part of the overhaul process. The overhauling process can be done at a fraction of the cost of buying new springs.

Clouth Spring Details

Part No. Height - H (mm)

Dimensions (mm)

Diame-tre d G L a a a1 b1

901.190.000.155.001 155 190 17 M48x2 80 158 190 158 190

901.225.000.158.001 158 225 18 75 78 200 245 200 245

901.199.000.246.001 246 199 17 60 65.4 150 182 150 182

901.225.000.266.001 266 225 - 124 23 - - - -

901.210.000.205.001 205 210 18 M24 95 155 190 175 210

901.220.000.220.001 220 220 18 M24 100 155 200 175 220

901.225.000.260.001 260 225 18 70 20 160 200 160 200

901.225.000.152.001 152 225 15 M48x2 128 158 188 158 188

901.228.000.275.001 275 228.5 18 M42 110 160 200 160 200

901.220.000.218.001 218 220 18 M42110 110 160 200 160 200

901.220.000.218.002 218 220 18 M42110 110 160 200 160 200

901.225.000.290.001 290 225 18 70 20 160 200 160 200

901.220.000.220.002 220 220 18 M42 99 170 220 155 200

901.184.000.150.001 150 184 13 M48x2 97.5 170 200 130 180

901.184.000.178.001 178 184 13 M48x2 97.5 170 200 130 180

901.184.000.150.002 150 184 13 M48x2 97.5 170 200 130 180

901.220.000.227.001 227 220 18 M42 105 170 220 155 200

901.265.000.284.001 284 265 22 - - 240 300 170 220

901.265.000.345.001 345 265 22 - - 240 300 170 220

901.220.000.206.001 206 220 17 M80x3 137 158 190 158 190

Clouth Springs



Application

Conical springs are used as vibration isolators or dampeners on bogie frames. These are easy fitting and compact in nature and when loaded the rubber is in both compression and shear. Conical springs allow for considerable excursion and have a progressive characteristic curve.

Features

The rubber spring reduces noise and pollution while increasing safety at higher travel speeds. The design of a multidirectional spring giving added wheel set guidance by co-ordinated longitude and lateral stiffness. The design is compact and light making it easy for retrofitting. It can even be used to upgrade older rolling stock to comply with modern comfort and environmental demands. Some conical springs are fitted with bump stops that help absorb shock loads without causing permanent damage.

OP

OD

H

K

L

G

b

b1

a1

a

Od


Conical Spring Details

Part No.Dimensions (mm)

TypeD P G H K L d a a1 b b1

902.196.000.152.001 196 147 58 152 - 48 15 158 158 190 190 1

902.196.000.231.001 196 220 68 231 - - 17.5 200 200 240 240 1

902.257.000.235.001 257 232 80 235 - 60 18 205 215 250 250 1

902.290.000.304.001 290 230 - 304 178 - - - - - - 2

902.257.000.288.001 257 230 - 288 177 - - - - - - 2

902.157.000.143.001 157 140 50 143 - 50 - - - - - 2

902.157.000.143.002 157 140 143 - 105 - - - - - 2

902.146.000.124.001 146.2 132 50 124.5 - 50 - - - - - 2

902.150.000.126.001 150 130 50 126 - 50 - - - - - 2

902.178.000.140.001 178 180 50 140 120 50 - - - - - 2

902.178.000.140.002 178 180 50 140 - - - - - - - 2

902.178.000.167.001 178 180 50 167.5 120 50 - - - - - 2

902.265.000.251.001 265 260 80 251 - 75 - - - - - 2

902.265.000.249.001 265 260 80 249 - 75 - - - - - 2

NOTESConical Springs

Type 1 Type 2

vulcanite Pty LtdIncorporated in 1946

PO Box 250, Regents Park NSW 2143 Australia

Tel +61 2 8889 3999 Fax +61 29645 3380 Email [email protected]

vulcanite.com

vulcanite USA1800 Mineral Spring Ave, Suite 127 North Providence, RI, 02904

Tel (401) 816 5960 Email [email protected]

vulcanite.com

vulcanite UKPO Box 456, Newcastle NE3 9DR UK

Tel +44 (0) 191 490 6203 Email [email protected]

vulcanite.com

chevron, clouth & conical springs -...

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