BYT1-180Z/12.C Series Explosion-Protected Electro-Hydraulic Thruster

The BYT1-180Z/12.C is an explosion-protected electro-hydraulic thruster with Exd I Mb certification, rated for 1800 N thrust and 120 mm stroke, primarily for mining/explosive environments to actuate drum/disc brakes and levers in hoists, conveyors, and underground coal mine equipment.

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Core Specifications

Parameter	Value
Rated thrust	1800 N (180 kgf)
Rated stroke	120 mm
Motor power	0.4 kW (three-phase, 660 V/1140 V, 50 Hz)
Action time	Rise: ~1 s; Decline: ~0.6 s
Max cycles	720 cycles/hour
Explosion-proof mark	Exd I Mb (complies with GB3836.1/2-2010)
Protection rating	IP55 (motor enclosure)
Operating temp	-20 °C to +40 °C
Weight	~25–30 kg

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Key Structure & Working Principle

Structure: Explosion-proof motor + integrated hydraulic pump, cylinder, piston, impeller, and pushrod; sealed housing with flameproof joints and cable glands.

Operation:

Power-on: Motor drives the impeller to generate pressure, pushing oil to lift the piston/pushrod and compress the brake spring (release brake).

Power-off: Impeller stops; piston descends under spring/gravity, oil returns, and the brake engages.

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Performance Advantages

Flameproof safety: Exd I Mb rating for underground coal mines and Zone 1 explosive atmospheres.

Integrated design: Compact, self-contained oil tank eliminates external piping; low noise and stable thrust.

Dual-duty capable: Intermittent (S3-60%) or continuous (S1) operation; high cycle endurance (720 c/h).

Durable components: Cast aluminum housing, B/F-class motor insulation, and treated shafts/seals for long life.

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Applications

Primary: Actuate YWZ series block brakes and drum/disc brakes for mine hoists, belt conveyors, and underground transport vehicles.

Secondary: Operate valves, ratchets, and levers in coal mines (must be installed in dedicated chambers).

Industries: Mining, metallurgy, ports, and heavy-duty material handling with explosive risks.

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Installation & Maintenance Tips

Installation:

Mount on a rigid base; align pushrod with the brake lever to avoid lateral loads.

Use certified explosion-proof cables and proper grounding; keep flameproof surfaces clean and undamaged.

Fill with clean ISO VG 32/46 hydraulic oil to the oil level mark; bleed air before commissioning.

Maintenance:

Daily: Check oil level, leaks, and abnormal noise; clean the surface and air breather.

6 months: Inspect oil quality; replace if degraded or contaminated.

12 months: Overhaul seals, check motor insulation (≥2 MΩ), and verify flameproof joint gaps.

Never modify flameproof components or use non-approved replacement parts.

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Common Faults & Fixes

Fault	Possible Cause	Repair
No thrust	Motor reversal, clogged filter, or impeller damage	Correct motor phase; replace filter/impeller
Slow action	Low oil level, air in system, or worn seals	Refill oil; bleed air; replace seals
Unstable pressure	Leaking joints or stuck relief valve	Tighten joints; clean/replace valve core
Motor overheating	Overload, voltage imbalance, or bearing wear	Reduce duty cycle; correct voltage; replace bearings

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