Electro hydraulic drum brake

Electric Hydraulic Drum Brake

The YWZ4 Electro Hydraulic Drum Brake is widely used for deceleration and parking (holding) braking. Specifically, they are essential in various lifting and transport mechanisms, port loading and unloading operations, metallurgical equipment, mining machinery, and construction machinery.

Electro hydraulic drum brake Main Features

To enhance performance, the brakes incorporate an interlocking equal clearance device and an automatic alignment device for the brake shoes. These devices ensure that the clearance on both sides of the brake shoes remains equal without requiring manual adjustment. Consequently, they effectively prevent one side’s brake pad from sticking to the brake wheel due to uneven clearance.

Additionally, manufacturers design the brake pad with a clamped integrally molded structure. This design makes replacement straightforward and efficient. Users can choose from a range of materials, including semi-metal (asbestos-free) hard and semi-hard options, as well as soft (asbestos-free) varieties, to suit their specific needs.

For improved durability, engineers equip all main pivot points with self-lubricating bearings. This feature significantly increases transmission efficiency and extends the brake’s service life.

Furthermore, the brake spring is strategically positioned inside a square tube and paired with a scale. This arrangement allows users to easily read the braking torque value, thus eliminating the need for complex measurements or calculations.

To complement these features, the matched series of thrusters provide high responsiveness and exceptional durability, ensuring reliable operation under various conditions.

Operating Conditions

• Ambient Temperature: The brakes operate effectively in environments with temperatures ranging from -20℃ to +50℃.
• Relative Humidity: They perform reliably when the relative humidity is ≤90%.
• Voltage Level: The brakes are designed to function with three-phase AC 380V/50Hz.
• Duty Cycle: They support both continuous operation (S1) and intermittent operation (S3-60%), with a maximum operation frequency of ≤1200 times per hour.

Additional Devices

To further enhance usability and safety, the YWZ4 Electro Hydraulic Drum Brakes offer the following optional devices:

• Manual Release Device: Users can manually release the brake when necessary.
• Brake Lining Wear Limit Switch: This device signals when the brake lining has reached its wear limit. (Note: Applicable only to brakes equipped with an automatic compensation device.)
• Release (Brake Open) Limit Switch: This switch provides an indication to confirm that the brake has been released correctly.
• Thruster with Lowering Delay Valve: When equipped with this feature, the brake can achieve delayed closure to meet specific operational requirements.

YWZ4 Electro hydraulic drum brake Technical Specifications and Installation Dimensions

Brake type	Thruster type	Brake torque (N.m)	Dimensions (mm)																		Weight (kg)
			D	h1	k	i	d	n	b	F	G	J	E	H	A		B		L	C
															A	B	A	B
YWZ4-160/22	YTD220-50	80~160	160	132	130	55	14	6	65	90	150	210	165	390	415	380	80	120	200	80	25
YWZ4-200/22	YTD220-50	100~200	200	160	145	55	14	8	80	90	165	265	195	470	440	405	80	120	260	80	38
YWZ4-200/30	YTD300-50	140~280										245									39
YWZ4-250/30	YTD300-50	160~315	250	190	180	65	18	10	100	100	200	275	225	500	490	455	80	120	260	80	47
YWZ4-250/50	YTD500-60	250~500												550	550	490	97	157	320	97	61
YWZ4-300/30	YTD300-50	160~315	300	225	220	80	18	10	125	110	245	358	275	585	550	510	80	120	260	80	74
YWZ4-300/50	YTD500-60	250~500													590	530	97	157	340	97	86
YWZ4-300/80	YTD800-60	500~1000																			88
YWZ4-315/30	YTD300-50	160~315	315	225	220	80	18	10	125	110	245	358	275	585	570	510	80	120	260	80	74
YWZ4-315/50	YTD500-60	250~500													590	530	97	157	340	97	86
YWZ4-315/80	YTD800-60	500~1000																			88
YWZ4-400/50	YTD500-60	315~630	400	280	270	100	22	12	160	140	300	420	350	705	625	565	97	157	450	97	108
YWZ4-400/80	YTD800-60	630~1250																			110
YWZ4-400/125	YTD1250-60	900~1800												770	610	580	120	150		120	133
YWZ4-500/80	YTD800-60	800~1600	500	335	325	130	22	16	200	180	365	484	395	835	740	680	97	157	450	97	202
YWZ4-500/125	YTD1250-60	1125~2250											410	850	730	700	120	150		120	212
YWZ4-500/200	YTD2000-60	1600~3150																			212
YWZ4-630/125	YTD1250-120	1400~2800	630	425	400	170	27	20	250	220	450	590	505	1025	840	810	120	150	450	120	309
YWZ4-630/200	YTD2000-120	2250~4500																			310
YWZ4-630/300	YTD3000-120	3550~7100																			315
YWZ4-710/200	YTD2000-120	2500~5000	710	475	450	190	27	22	280	240	500	705	565	1170	1050	1020	120	150	450	120	455
YWZ4-710/300	YTD3000-120	4000~8000																			460
YWZ4-800/300	YTD3000-120	6300~12500	800	530	520	210	27	28	320	280	570	860	710	1410	1085	1060	120	150	450	120	652