Industry News-Jiaozuo brake

Hydraulic drum brake pads

Hydraulic drum brake padsHydraulic drum brake padsBrake specific model:YWZ, YWZ3, YWZ4, YWZ5, YWZ8, YWZ10, YWZ9, YWZ13, YW series electric hydraulic brakesYT1, ED, YTD. series electric hydraulic thrustersJZ, MW, TJ2, ZWZA, ZWZ3 series electromagnetic brakesQP, CQP series pneumatic caliper disc brakeDCPZ series electromagnetic caliper disc brakeYPZ series arm disc brakeSBD series safety brakeSH, ST series hydraulic failure protection brakeDADH series hydraulic direct acting brakeSE series electromagnetic failure protection brakeSP series pneumatic failure protection brakeYFX, YDGZ, YLBZ, Series Windproof BrakesDP series motor disc brakeCustomized various types of brake pads, friction plate couplings, brake wheels, brake discs, and non-standard brakes according to user needs1. Brake drum. The working surface of the inner wall of the brake drum will experience severe wear after long-term braking use. Its roundness has changed, and the coaxiality between its inner working surface and its installation positioning surface has also changed. As a result, various faults may occur when the car is braking, such as poor braking effect, noise, vibration, etc. Therefore, timely repairs must be carried out. As for the repair method to be used, it can be determined based on the wear and tear situation. When the wear of the inner wall working surface is not very severe, and the changes in its roundness and coaxiality of the positioning reference are not too large, the method of honing can be used to solve it. Usually, the roundness of the inner wall working surface reaches 0 5 mm, with a coaxiality of 0 2 mm requires hole lining repair. The common damages of brake drums in operation include wear and grooving of the friction surface, as well as deformation and loss of roundness. These damages will directly affect braking efficiency. Therefore, the working surface of the brake drum must be flat and smooth, and have good contact with the friction plate. Minor scratches, small grooves, and slight mechanical damage on the outer shoulder are allowed without affecting the quality of use. The roundness error can be measured with a dedicated bow inner diameter gauge, and the radius error exceeds 0 13 mm, or severe grooves caused by exposed shoe rivets, should be polished on a lathe or brake drum polishing machine according to the actual wear situation. If the brake drum of a car experiences cracks, severe deformation, or wear, and the inner diameter exceeds the limit, it should be replaced. The repaired brake drum should undergo a static balance check, and its static imbalance should not exceed 200 g • cm. When grooves appear on the working surface of the brake drum, or its roundness and radial total runout (i.e. the deviation from the hub axis) exceed the usage requirements, it will seriously affect the braking efficiency of the car and should be repaired in a timely manner. General requirements for brake drum lining: Position the outer ring of the wheel hub bearing (to ensure coaxiality after lining). After lining, the inner diameter of the brake drum shall not exceed the basic size by 4 mm, and the cylindricity shall not exceed 0 10mm, with a radial runout of no more than 0 10 mm. If the inner diameter of the brake drum is worn beyond the specified limit, it should be replaced with a new one.2. Brake shoe friction lining. When the brake shoe friction lining is severely worn, or the surface of the friction lining is severely contaminated or burned by oil, a new shoe should be replaced. When replacing, both left and right wheels must be carried out simultaneously, and friction linings of the same manufacturer, brand, and material must be selected and installed. When the new shoe after replacement does not fit well with the brake drum, it should be ground until it meets the requirements. The general requirement is to ensure that the bonding area between the shoe and the brake drum is greater than 60% of the total area of the friction lining. The brake shoe return spring should be checked for its free length. If it exceeds 5% of its standard length or if there is a gap between the coils, it should be replaced. If the brake shoe tendon is warped or deformed, it will interfere with the bolt (nut) of the brake clearance adjustment device, and with the groove of the brake cylinder piston and brake support plate. This will affect the free opening and return of the brake shoe friction lining assembly. If this situation occurs, it can be repaired using cold correction methods. If the brake shoe base plate undergoes deformation, it can also be repaired using cold correction methods. For cracks in the brake shoe bottom plate welds caused by deformation or other reasons, the verticality shall not exceed 0 At 25 mm, welding repair and correction can be carried out; If the damage is too severe and cannot be repaired, it should be replaced. The tension spring of the brake shoe must maintain a certain amount of elasticity. If there is a severe decrease in elasticity, it often causes the brake tendon to detach from the groove of the brake support plate and become stuck, causing the brake to not be released. Therefore, it is necessary to replace springs with severely reduced elasticity in a timely manner. During driving, due to the frequent application of braking to the car, the brake drum and brake shoe friction plate will experience varying degrees and types of wear or deformation. To ensure driving safety, it is necessary to repair it. Within the allowable range of repair dimensions, the brake drum is often processed using ordinary lathes or specialized machine tools. At present, there are two ways to process brake friction pads. One is to remove them from the vehicle and fix them on a specialized fixture for grinding or turning. Although this method can improve processing quality, save labor hours, and is suitable for division of labor and flow operations, due to the limitations of current overhaul and maintenance technology in China, the brake shoes processed in this way often cannot meet the assembly requirements of vehicles, thereby affecting braking efficiency in the early stages of driving. Another method is to machine the brake shoe friction plates on the machine. As it is positioned and processed based on actual conditions, it is more suitable for the assembly requirements of the brake. Although this method requires more labor, it is flexible and convenient for general repair shops or workshops to use. The equipment processed using the second method is mostly self-made, which can be divided into integral and separate types from the perspective of the overall structure. The latter is to install the moving tool head and feed mechanism on a small car, while the tool holder and positioning device are fixed on the front or rear axle of the car; The former institutions are installed as a whole on the car. There are two types of integrated brake shoe polishing machines: manual and electric, while the separate types are mostly electric.Production and sales of YWZ-YWZ13, YW, YWL series electric hydraulic brakes, ZWZ, TJ2A series electromagnetic brakes, YPZ series disc brake Ed thruster, YT1 series electric hydraulic thruster, BYT1 series explosion-proof electric hydraulic thruster, pneumatic thruster and hydraulic devices. At present, the product has more than 30 series and over 500 specifications, with an annual production capacity of 60000 sets. Our company is a member unit of the Crane Association and the Construction Machinery Industry Association, and has obtained the brake "Product Quality Approval Certificate", "Type Test Approval Certificate", and "Special Equipment Type Test Qualification Certificate" issued by the National Center for Quality Supervision, Inspection and Testing of Lifting and Transportation Machinery Products. And passed the ISO: 9000 and GB/T19001-2000 Quality Management System Certification of the China Fangyuan Certification Committee. In 2004, it was awarded the title of High Quality Product in Henan Province. Obtained the National Industrial Product Production License (Explosion proof Electrical Appliances) in April 2008

time：2022-05-09

Troubleshooting of SBD series disc brakes

Hydraulic fail safe disc brake:3SH; 4SH; 5SH; 450SH; ST1SH; ST2SH; ST3SH; ST4SH; ST5SH; ST10SH; ST16SH; ST25SH; 904SH;ST40SHPneumatic fail safe disc brake:3SP; 4SP; 5SP; 450SPHydraulic direct acting disc brake:ADH60; ADH90; ADH120; DADH75; DADH80; DADH90; DADH120; DADH195; DADH350Pneumatic direct acting disc brake:ADP60M; ADP61M; ADP62MPneumatic caliper disc brakeCQPL12.7A-A; CQPL12.7A-B; CQPL12.7B; QPL12.7A-A; QPL12.7A-B; QPL12.7-A; QPL12.7-B;QP30-D; QP25.4-D; CQP30-D; CQP25.4-D; PDA5; PDA10; PDB5; PDB10; PDB19; PDC5; PDC10Electromagnetic caliper disc brake:DCPZ12.7-250; DCPZ12.7-300; DCPZ12.7-400Hydraulic caliper disc brake:SB (YQP) 50; SB (YQP) 100; SB (YQP) 160; SB (YQP) 250; SB (YQP) 315; SB (YQP) 400;SBD safety brake:SBD100-A; SBD125-A; SBD160-A; SBD200-A; SBD250-A; SBD-B; SBD160-B; SBD250-C; SBD365-C; SBD425-C; SBD80-B; SBD160-B; SBD250-C; SBD365-C; SBD425-C; SBD120-D; SBD240-DPlease pay attention to the failure causes and maintenance methods of the disc brake.The common faults of disc brake include air resistance, insufficient braking force and noise during braking. Here is a brief introduction to the causes and maintenance methods of the faults.1、 Air resistanceThe heating part of the disc brake is concentrated on a very narrow brake pad, and its unit pressure is larger than that of the drum brake. The brake pad is in direct contact with the piston of the caliper body, so the heat during braking is easily transferred to the brake fluid. In this way, the disc brake is prone to air lock. However, if corresponding measures are taken, the occurrence of air resistance can also be prevented.1. Prevent the boiling point of brake fluid from decreasingVegetable oil type brake fluid cannot meet the use requirements of disc brake, so synthetic brake fluid with high boiling point must be used. However, synthetic brake fluid has water absorption properties. Under certain usage conditions, the boiling point decreases rapidly. To prevent a significant decrease in the boiling point of brake fluid, the following measures are commonly adopted:(1) Regularly replace the brake fluid. 3 months or 5000km in summer; After 6 months of winter or 1000 kilometers of driving, the brake fluid will be updated soon.(2) Brake fluids with different properties cannot be interchanged or mixed.(3) Store brake fluid tightly. Automobile maintenance networkTo increase the temperature of the brake fluid, it is necessary to ensure that the piston can flexibly and automatically return to its original position to avoid slipping or biting of the brake due to rust or jamming. When the brake pads are excessively worn, the heat transmitted to the brake fluid will also rapidly increase. Therefore, worn brake pads should be replaced in a timely manner.2、 Insufficient braking forceWhen the braking force of the disc brake is insufficient, the following methods can be used to solve the problem:1. Change the brake pad materialA slightly softer brake pad material can be used to improve the friction coefficient and increase the braking force.2. Remove foreign objects from the debris removal groove of the brake padIf the debris discharge groove of the brake pad is covered by foreign objects, the effect of dust discharge and water scraping will be lost during braking, resulting in a decrease in braking force.3、 Noise during brakingWhen braking, if there is a "squeaking, squeaking" noise, the following methods can be used to eliminate it:1. Add an anti noise pad between the brake caliper piston and the brake lining to create a tilt on the piston. This ensures flexible contact between the brake pads and brake discs during braking, ensuring that there is no abnormal noise in the brake pads under normal wear and tear conditions.2. Choose a brake pad material that is softer and less dense.3. When braking, the brake pads may move to one side and there may be a knocking sound. This is due to the excessive gap between the brake pad and the caliper body, which can be eliminated by electroplating solder. However, it should be noted that the solder should be coated on the side opposite to the direction of travel to prevent failure under the action of braking force.4、 Damaged front wheel bearingsThe brake caliper body is generally installed behind the steering knuckle, which can relatively reduce the load on the front wheel bearings during braking. However, some models install the clamp body in front of the axle, which increases the synthetic load on the front wheel bearings and can easily cause premature damage to the front wheel bearings. Therefore, for wheels with this structure, timely adjustment and maintenance should be carried out.The purpose and characteristics of the power loss brakeThe purpose and characteristics of the power loss brake, brake factory 15838971872, welcome friends to cooperate and consult with the factory.The purpose of the power-off brake: The DHD series brakes are friction disc brakes (hereinafter referred to as brakes) that apply spring pressure during electromagnetic disengagement (release) and power-off. It can be paired with electric power to become a new type of braking motor, and can also be used in mechanical transmission systems to achieve fast parking and accurate positioning. It can be used in situations such as safe (anti risk) braking in case of power failure. This type of brake has the advantages of simple structure, wide adaptability, low noise, and reliable braking, and is widely used in various mechanical transmission devices. It is an ideal actuator in industrial modernization. The automation of production technology requires ultra-thin power-off brakes (safety brakes) to meet the needs of various machinery such as robots and motors for different purposes with their excellent characteristics.Structural characteristics of the power loss brake:1. Although the axial size of the compact and power-off brake is small, the braking torque is sufficient.2. The quick response and power loss brake uses a spring device to form braking torque, and the spring reset time is the braking response time.3. Long service life, power loss braking adopts new friction materials, which determine the performance of high service life.The power loss brake can operate reliably under the following conditions:1. The relative humidity of the surrounding air shall not exceed 85% (20 ± 5 ℃).2. There is no gas or dust in the surrounding medium that is sufficient to corrode metals and damage insulation.3. The brake is surrounded by Class B insulation, with voltage fluctuations not exceeding+5% and -15% of the rated voltage, and its working mode is continuous working.4. During installation, ensure the accuracy of the fit between the transmission shaft and the brake.5. The brake disc of the brake must be used without oil stains.Please pay attention to the failure causes and maintenance methods of the disc brake.The common faults of disc brake include air resistance, insufficient braking force and noise during braking. Here is a brief introduction to the causes and maintenance methods of the faults.1、 Air resistanceThe heating part of the disc brake is concentrated on a very narrow brake pad, and its unit pressure is larger than that of the drum brake. The brake pad is in direct contact with the piston of the caliper body, so the heat during braking is easily transferred to the brake fluid. In this way, the disc brake is prone to air lock. However, if corresponding measures are taken, the occurrence of air resistance can also be prevented.1. Prevent the boiling point of brake fluid from decreasingVegetable oil type brake fluid cannot meet the use requirements of disc brake, so synthetic brake fluid with high boiling point must be used. However, synthetic brake fluid has water absorption properties. Under certain usage conditions, the boiling point decreases rapidly. To prevent a significant decrease in the boiling point of brake fluid, the following measures are commonly adopted:(1) Regularly replace the brake fluid. 3 months or 5000km in summer; After 6 months of winter or 1000 kilometers of driving, the brake fluid will be updated soon.(2) Brake fluids with different properties cannot be interchanged or mixed.(3) Store brake fluid tightly. Automobile maintenance networkTo increase the temperature of the brake fluid, it is necessary to ensure that the piston can flexibly and automatically return to its original position to avoid slipping or biting of the brake due to rust or jamming. When the brake pads are excessively worn, the heat transmitted to the brake fluid will also rapidly increase. Therefore, worn brake pads should be replaced in a timely manner.2、 Insufficient braking forceWhen the braking force of the disc brake is insufficient, the following methods can be used to solve the problem:1. Change the brake pad materialA slightly softer brake pad material can be used to improve the friction coefficient and increase the braking force.2. Remove foreign objects from the debris removal groove of the brake padIf the debris discharge groove of the brake pad is covered by foreign objects, the effect of dust discharge and water scraping will be lost during braking, resulting in a decrease in braking force.3、 Noise during brakingWhen braking, if there is a "squeaking, squeaking" noise, the following methods can be used to eliminate it:1. Add an anti noise pad between the brake caliper piston and the brake lining to create a tilt on the piston. This ensures flexible contact between the brake pads and brake discs during braking, ensuring that there is no abnormal noise in the brake pads under normal wear and tear conditions.2. Choose a brake pad material that is softer and less dense.3. When braking, the brake pads may move to one side and there may be a knocking sound. This is due to the excessive gap between the brake pad and the caliper body, which can be eliminated by electroplating solder. However, it should be noted that the solder should be coated on the side opposite to the direction of travel to prevent failure under the action of braking force.4、 Damaged front wheel bearingsThe brake caliper body is generally installed behind the steering knuckle, which can relatively reduce the load on the front wheel bearings during braking. However, some models install the clamp body in front of the axle, which increases the synthetic load on the front wheel bearings and can easily cause premature damage to the front wheel bearings. Therefore, for wheels with this structure, timely adjustment and maintenance should be carried out.

time：2022-05-07