Jiaozuo brake

Knowledge of matching composition principle of disc brake and brake disc

The disc brake is mainly used with the brake disc to form a disc brake device, which is used for working braking and emergency safety braking of large electromechanical equipment to achieve controllable braking and parking. Due to its normally closed structure, it also has a seating function.

Disc brake series (commonly known as holding brake, installed on both sides of the brake disc of the winch drum, friction brake disc forces the drum to stop when braking), disc brake is a hydraulic actuator applied to the braking system of the mine hoist, and its exact name should be: normally closed rear cylinder disc brake. At present, rear cylinder is widely used. When the hoist starts, the hydraulic station outputs pressure oil to open the brake, and the hoist starts to work, During the working braking, the hydraulic station will increase or decrease the pressure according to the working condition, and the disc brake will provide the opposite braking force. Under the accident condition, the pressure of the hydraulic station will return to the residual pressure, and the brake will stop the hoist in a short time with a large braking force.

2、 Installation requirements

1) The two large planes of the brake shoe should be scraped flat, assembled according to its assembly drawing, and the brake shoe and sliding sleeve should be fully fitted to ensure uniform pressure between the brake shoe and the brake disc.

2) The oil pipe, disc brake cylinder, oil passage, piston, etc. of the disc brake shall be clean, and the surface shall be free of bruises, etc.

3) Check the end face deflection of the brake disc, and its value should not exceed the actual drawing requirements.

4) The deviation H between the two sides of the support of the same disc brake and the brake surface of the brake disc shall not be greater than, and the non parallelism between the two sides of the brake support and the brake surface shall not be greater than

5) The symmetrical centerline plane of the brake cylinder of each disc brake and the axis of the main shaft shall be in the same horizontal plane, and the deviation 2 shall not be greater than 3mm.

Structure principle of disc brake

The fixed component is installed on the fixed component, and the brake disc is connected to the rotating component. When braking, the fixed component is pressed onto the brake disc, utilizing friction to achieve braking.

structure type 

The structure of fixed components in massage wipes can be divided into two types: clamp disc type and full disc type

1. The structural principle of the full disc brake: the rotating elements and fixed elements of the friction pair in the full disc brake are both disc shaped. When braking, the friction surfaces of the two discs are in full contact, and the working principle is like a friction clutch.

2. The structure principle of the caliper disc brake: the fixed element of the caliper disc brake is the brake pad, which is installed in the brake caliper that is connected with the axle and cannot rotate around the axle axis. The contact area between the brake pad and the brake disc is very small.

classification

Fixed clamp type

Structural features: The brake caliper does not move, and there are hydraulic cylinders on both sides of the brake disc

Performance characteristics: There are no sliding parts except for pistons and brake pads, with good stiffness and easy manufacturing. It can adapt to different circuit driving requirements, but it is large in size, difficult to arrange, and generates a lot of heat

Sliding clamp type

Structural features: The brake caliper can perform axial sliding, and there is a hydraulic cylinder on the inner side of the brake disc

Swing clamp type

Structural features: The brake caliper is hinged with the fixed seat, and there is a hydraulic cylinder on the inner side of the brake disc

ST3SH Double On Off Real Image

Specific production model of brake:

YT1, ED, YTD.BYT1, BED, ED2, MYT1, ZED, DEd series electric hydraulic thrusters

JZ, MW, TJ2, ZWZA, ZWZ3 series electromagnetic brakes

YWZ, YWZ3, YWZ4, YWZ5, YWZ8, YWZ10, YWZ9, YWZ13, YW, YWL series electric hydraulic brakes

BYWZ, BYWZ3, BYWZ4, BYWZ5, BYWZ8, BYWZ10, BYWZ9, BYWZ13, BYW series electric hydraulic brakes

QP, CQP, QPC, CQPL, QPL, PDA series pneumatic caliper disc brake

DCPZ250, DCPZ300, DCPZ400 series electromagnetic caliper disc brake

YPZ2, YPZ3, YPZ1, YP series arm disc brake

SPZ symmetrical brake arm disc brake

SBD, SB series safety brakes

SH, ST series hydraulic failure protection brake

DADH, ADH, ADP series hydraulic direct acting brakes

SE series electromagnetic failure protection brake

SP series pneumatic failure protection brake

YFX, YDGZ, YLBZ, Series Windproof Wedge Brakes

YQP hydraulic disc brake

Electric hydraulic arm disc brake series model:

YPZ2IV, V, VI electric hydraulic arm disc brakes, YPZ2I, YPZ2II, YPZ2III electric hydraulic arm disc brakes.

Pneumatic caliper disc brake series model:

DCPZ12.7 series electromagnetic caliper disc brake, CQPL12.7-B pneumatic caliper disc brake, CQPL12.7-A direct pneumatic caliper disc brake, CQP12.7 pneumatic direct caliper disc brake, QPL12.7-A pneumatic caliper disc brake, QP12.7-A pneumatic caliper disc brake, QP12.7 pneumatic caliper disc brake, DJPZ motor disc brake.

Electric failure protection brake series model:

ST1SH hydraulic failure protection brake, ST2SH hydraulic failure protection brake, ST3SH hydraulic failure protection brake, ST4SH hydraulic failure protection brake, ST5SH hydraulic failure protection brake, SBD hydraulic failure protection brake, 561SE electric failure protection brake.

Electric hydraulic windproof iron wedge brake series model:

DFX, DAF electromagnetic hydraulic safety windproof iron wedge brake, YFX (YAF) series electric hydraulic windproof iron wedge brake.

characteristic

1. Advantages

Good thermal stability, while drum brakes exhibit mechanical decay

Good water stability, mud and water are easily thrown away from the brake disc

The braking torque is independent of the direction of motion

Easy to construct dual circuit system, reliable and safe

Small size, low quality, and good heat dissipation

Uniform pressure distribution and uniform pad wear

Replacing the pads is simple and easy

2 Disadvantages

Difficult to prevent debris from getting onto the work surface

When used as a parking brake, the driving mechanism is complex

Booster needs to be installed in the brake drive mechanism

The pad has a small working area, fast wear, and low lifespan.

Short braking coordination time

Easy to achieve automatic gap adjustment

overhaul

1. Use a dial gauge to detect that the cross-sectional runout error of the brake disc is greater than 0.06mm. The surface of the brake disc has obvious wear steps and strained grooves, which can be processed and repaired

2. Check that the wear limit thickness of the brake disc is 8mm. If the thickness exceeds the limit, replace it with a new one

When the thickness of the brake shoe friction plate is less than 7mm (including the bottom plate), the friction plate must be replaced, and the left and right wheels must be replaced in sets (4 friction plates, 4 spring plates)

4. Check the brake caliper body. If any oil leakage is found, replace it with a new piston sealing ring

In the case of full contact between the brake shoe and the brake disc, the actual average friction radius R shall not be less than the designed average friction radius R.

The gap C between the brake production and the outer edge of the brake disc shall not be less than 5 millimeters.