Advantages of drum brake pads and reasons for failure
Drum brake pads are widely used in the rear wheels of small cars because of their low cost and high braking force. So what are the advantages of drum brake pads? Why do drum brake pads sometimes fail? Today, the editor will tell you about the advantages and disadvantages of the drum brakes. I hope to help everyone.
Advantages of drum brake pads
First, there are many voids on the surface of the drum brake pad, which reduces the effective area of the material itself to withstand external loads, resulting in a smaller value for the test.
Secondly, a large number of synthetic inorganic and organic fillers are used in the drum brake pad formulation. The fillers have good affinity and a good friction layer and transfer film are formed during the friction process.
Thirdly, the bonded phase in the drum brake pad does not decompose at high temperatures, and has a good bonding effect. Various fillers are firmly embedded in the base body, so the friction coefficient of the drum brake pad is stable, and the high temperature heat is degraded. small. There is also a strong self-cleaning ability of the drum brake pad, which can continuously update the working surface during the braking process to form a stable friction layer, and the brake disc can be well fitted.
The drum brake pad has the characteristics of stable friction coefficient, good temperature resistance, long service life, comfortable braking, no damage to the dual disc, low brake noise, and high cost performance, so it is very popular in the market.
The cause of the failure of the drum brake pad
1. Improper operation causes the brake mechanism to malfunction. If the brakes are frequently braked for a long time or at a high speed, the brake pads will be heated by friction, the brake discs will wear, the brake hub will heat up, and the temperature of the brake system will rise, causing the brake oil temperature in the brake pipe to rise, even in the pipe. The gas makes the brakes malfunction.
2. severe overload, mainly refers to large vehicles, under the effect of gravity acceleration, increase the inertia of vehicle movement, often lead to brake failure, brewing tragedy.
3. the brake system, lack of necessary maintenance. There are too many impurities in the brake master cylinder, the seal is not strict enough, the vacuum booster pump is invalid, the brake oil is dirty, or the brake fluid is mixed. The air resistance occurs after heating, the brake master cylinder or the pump leaks oil, the gas tank or the tube Air leakage from the road interface and air in the brake circuit may also cause the brake to malfunction.
The above is about the advantages and disadvantages of the drum brake pads. I hope everyone can understand the advantages and disadvantages of the drum brakes.