Description

Product Overview

Explosion Proof Electric Hydraulic Drum Brakes are spring-applied, electro-hydraulic released braking systems designed for stopping and holding rotating equipment operating in hazardous environments such as mining, bulk handling, petrochemical plants, offshore terminals, and combustible dust areas.

Key Performance Features

Explosion-Isolated Actuation System
The electro-hydraulic thruster adopts explosion-protected motor housing and sealed cable entry structures to prevent ignition sources from reaching surrounding explosive gas or dust atmospheres.

Stable Brake Torque Under Continuous Duty
The thruster converts electrical energy into hydraulic linear output, eliminating magnetic force attenuation associated with long energization cycles and maintaining consistent release characteristics.

Reduced Pad Taper Wear
Dual-arm transmission and synchronized shoe movement maintain balanced contact pressure on the drum surface, reducing localized friction block consumption.

Controlled Brake Engagement
Internal hydraulic damping moderates return speed during brake application to reduce impact loading on couplings and transmission components.

Manufacturing & Quality Control

Component	Process Control	Verification Data
Explosion-Proof Thruster	Housing machining and flame path inspection	Joint gap and enclosure inspection record
Brake Arms	CNC-machined critical interfaces	Arm parallelism ≤0.05 mm
Brake Drum Shoes	Arc-profile machining	Shoe contact area verification
Hydraulic Chamber	Sealing and pressure holding test	No visible leakage
Final Assembly	Dynamic opening and closing test	Full-stroke functional record

Environmental & Protection Design

Category	Available Options
Hazard Protection	Gas explosion area / Combustible dust area
Thruster Voltage	380V / 415V / 440V / Customized
Friction Material	Semi-metallic / Non-asbestos
Feedback	Limit switch / Wear indication
Surface Protection	Outdoor coating / Marine-duty coating
Installation	Horizontal / Vertical

Model Designation Explanation

product-818-255

Example: For a brake with a brake wheel diameter of 630 mm, a rated braking torque of 2000 N·m, and a vertically arranged brake spring on the side of the brake unit, the model number would be DYW630-2000.

Overall Dimensions Drawing

product-1777-1155

Technical data table

Unit:mm

Brake model	Matching thrusters	Braking torque(N.m)	Retreat distance(mm)	A	b	C	D	d	E	F	G1	G2	HHmax	h1	i	K	M	n	L	G3	Weight (Kg)
DYW200-224	BEd30/5	140-315	1.0	543	80	160	200	14	175	90	165	265	500	160	55	145	140	10	150	75	56
DYW250-450	BEd50/6	315-500	1.0	637	100	195	250	18	205	110	200	290	585	190	65	180	160	12	180	100	76
DYW300-750	BEd80/6	630-1000	1.25	692	140	195	300	18	255	115	245	330	585	225	80	220	180	12	170	135	104
DYW315-900	BEd80/6	630-1000	1.25	692	125	195	315	18	255	115	245	330	585	225	80	220	180	12	170	135	104
DYW400-1200	BEd121/6	1000-2000	1.25	764	160	240	400	22	310	160	310	420	760	280	100	270	220	14	170	150	219
DYW500-1600	BEd121/6	1120-2500	1.25	864	200	240	500	22	390	180	365	535	830	335	130	325	280	16	180	185	219
DYW500-1600	BEd201/62	2000-4000	1.25	864	200	240	500	22	390	180	365	535	830	335	130	325	280	16	180	185	329
DYW600-1800	BEd121/6	1800-2800	1.6	989	240	240	600	26	470	220	450	600	1025	425	170	400	340	25	185	280	329
	BEd201/6	2500-4500	1.6	989	240	240	600	26	470	220	450	600	1025	425	170	400	340	25	185	280	335
	BEd301/5	4000-6500	1.6	989	240	240	600	26	470	220	450	600	1025	425	170	400	340	25	185	280	329
DYW630-2000	BEd121/6	1800-2800	1.6	989	250	240	630	26	470	220	450	600	1025	425	170	400	340	25	185	280	329
	BEd201/6	2500-5000	1.6	989	250	240	630	26	470	220	450	600	1025	425	170	400	340	25	185	280	329
	BEd301/64	4000-7100	1.6	989	250	240	630	26	470	220	450	600	1025	425	170	400	340	25	185	280	335
DYW710-2250	BEd121/6	1800-2800	1.6	1044	280	240	710	27	530	240	500	650	1135	475	190	450	360	30	220	300	449
	BEd201/6	2500-5600	1.6	1044	280	240	710	27	530	240	500	650	1135	475	190	450	360	30	220	300	449
	BEd301/6	4000-8000	1.6	1044	280	240	710	27	530	240	500	650	1135	475	190	450	360	30	220	300	454

Note:

In addition to this series of brakes, our company also manufactures other types of brakes.
For non-standard products with custom models or specifications, please contact our technical support team.

Typical Engineering Options

Manual release mechanism for maintenance isolation
• Stainless fasteners for corrosive environments
• Low-temperature hydraulic medium configuration
• Anti-condensation electrical treatment
• High-cycle lining package for frequent braking

Product Certificate

Our company has passed ISO 9001 international quality system certification and possesses comprehensive quality assurance capabilities. All products are certified by national authoritative institutions, including the "Brake Type Test Certificate," "Explosion-Proof Certificate," and "Mining Product Safety Mark Certificate," ensuring full qualifications and reliable quality.

FAQ

Q: How is explosion protection selected for different hazardous areas?

A: Selection depends on hazardous zone classification, gas or dust type, ignition temperature, and site electrical requirements. Brake and thruster certification must match the installation classification.

Q: Why choose electric hydraulic release instead of electromagnetic release in hazardous environments?

A: Electro-hydraulic systems provide higher release force and more stable stroke output for medium and large drum brake sizes while reducing release fluctuation during continuous operation.

Q: Does brake torque decrease as friction linings wear?

A: Normal lining wear primarily changes operating clearance. Torque stability depends more on spring output, contact geometry, and correct clearance adjustment.

Q: Can one electro-hydraulic unit operate multiple drum brakes?

A: Multi-brake configurations may be supported when release force, oil displacement, and synchronization requirements are verified during engineering design.

Q: How is thermal expansion of the brake drum managed?

A: Shoe geometry and linkage movement reserve operating compensation space to maintain release capability as drum diameter changes during temperature rise.

Q: What conditions accelerate brake lining failure?

A: Frequent emergency stops, excessive drum temperature, oil contamination, incorrect shoe clearance, and prolonged slipping contact are the main causes.

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