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GM-3 friction lining

GM-3 friction lining

As one of the main components of friction lining for multi rope friction hoist, early applied to multi rope friction hoist. friction lining are mainly polyvinyl chloride (PVC) and polyurethane (CPUR), polyvinyl chloride (PVC) friction liner friction coefficient (0.20) and wear resistance are poor, polyurethane (CPUR) friction lining increase in wear resistance, but the friction coefficient is still in 0.2-0.23, and because of poor processing performance, Rope groove was difficult, because of the process factors of rope groove, so that the quality is not stable. melting phenomenon will cone in the using, therefore, polyurethane (CPUR) friction lining also can be used only in the range of friction the coefficient of 0.22. In our country, multi rope friction hoist of friction coefficient of more than 0.25 is imported from abroad, but the price is expensive and the import cycle is long.

 

Comparison between GM-3 friction liner and K25  friction liner equal power abrasion test

Sample No.

Try

before

weight(g)

Try

after

weight(g)

 

Abrasion

(g)

Total

Abrasion

(g)

Volume

(cm2)

Equal

power

abrasion

(10-6cm3/KN.m)

 

K25

1#

549.70

  549.23

  0.47

0.75

0.481

5.29

2#

548.12

  547.84

  0.28

GM-3

1#

513.44

  513.15

  0.29

0.56

0.412

5.29

2#

523.22

  522.95

  0.27

 

Luoyang mining machinery plant in 1997 years began to develop the GM-3 high performance friction lining, and passed technical appraisal in Sep. 12, 2001 by the provincial and ministerial level .

Friction liner is the key part of the multi-rope friction hoist. Its property of using directly affects the property parameters, the hoisting capacity and the safety reliability of the hoist.

Friction liner material experienced the process of polyvinyl chloride, polyurethane, polyurethane, and thermosetting materials. The first three materials designed the friction coefficient in 0.2 ~ 0.23, the last material’s friction coefficient is more than 0.25 ( high friction liner). 

High friction liner is divided into domestic high friction, imported materials to suppress high friction, pure imported high friction three. The users can choose at will according to their needs. Tower hoist liner is a rope groove, floor type hoist liner two rope grooves, mainly for the convenience of turning rope groove. In return, they also improved the liner service life and the usage rate of liner material. The friction liner is fixed on the friction wheel by fixed block and pressing block through bolts.

GM-3 friction liner Mechanical properties

   No.

Item

Unit

Measure

results

Remarks

   1

density

g/cm3

1.36

 

   2

hardness

HD

70-74

GB/T2411

   3

impact strength

KJ/M2

9.72

GB1843

   4

tensile strength

Mpa

19.10

GB1040

   5

Bending strength

Mpa

26.22

GB9341

   6

Flexural modulus

Mpa

920

GB9341

   7

elongation at break

%

10.6

GB1040

   8

compressive strength

Mpa

45.6

GB1041

   9

  thermal decomposition temperature

320

 

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