Worm Gear Reducer for Mining Crushers

Worm Gear Reducer for Mining Crushers

Mining crushers — jaw crushers, cone crushers, and roll crushers — represent some of the most mechanically demanding environments in heavy industry. They impose extreme impact loads, high starting torques, and continuous vibration on every drive component. The pengurang gear cacing deployed in crusher auxiliary and feeder drives delivers high reduction ratios in a compact envelope, ensuring full drive torque from a standard motor frame even in the space-constrained confines of a mine shaft or processing plant.

While the primary crusher drive may use a direct-drive or fluid coupling arrangement, worm gearboxes serve critical roles in the crusher circuit: driving the vibrating grizzly feeder that regulates ore feed rate, actuating the CSS adjustment mechanism, driving the lubrication oil pump motor on large gyratory crushers, and controlling the apron feeder beneath the jaw crusher discharge.

In all these roles, the worm reducer’s defining advantage is torque multiplication at compact size — reduction ratios up to 100:1 from a single stage allow a small motor to overcome the starting inertia and shock loads characteristic of crusher circuits.

Aplikasi & Kes Penggunaan Industri

In a typical crusher plant layout, worm gearboxes appear at multiple points in the circuit:

• Vibrating grizzly feeder drives — eccentric mass adjustment and feed rate control
• CSS adjustment actuators on cone crushers — precise low-speed setting changes under hydraulic load
• Apron feeder drives beneath jaw crushers — high starting torque against loaded apron pans
• Roll crusher drives (secondary stage) — low-speed high-torque direct drive of crushing rolls
• Lubrication pump drives on large gyratory crushers — slow continuous pump rotation

Material specifications for crusher duty: Worm shaft in carburised-and-quenched alloy steel (HRC 60–62). Worm wheel in special alloy bronze with higher tin content for improved impact resistance. Housing in ductile iron GGG40 with IP65 sealing as minimum — IP66 recommended near crusher discharge zones where water-and-fines slurry splashing is common.

Shock load and service factor: Crusher circuits are classified as heavy-shock applications with service factor SF=1.75–2.0. This means the gearbox must be selected with a rated output torque at least 1.75× the calculated application torque. Undersizing a worm gearbox in a crusher circuit leads to premature bronze wheel wear and thermal overload.

Spesifikasi Teknikal & Panduan Pemilihan

Gunakan jadual di bawah untuk mengenal pasti model yang sesuai. Parameter utama termasuk nisbah pengurangan, tork output, dimensi aci dan bahan perumah. Sentiasa gunakan yang betul Faktor Perkhidmatan (SF) untuk kitaran tugas anda.

► Faktor Perkhidmatan (SF): Beban seragam SF=1.0 | Kejutan sederhana SF=1.25–1.5 | Kejutan berat / 24 jam berterusan SF=1.75–2.0

► Suhu ambien: Unit standard yang dinilai –10°C hingga +40°C. Tapak ambien tinggi Australia (>45°C) memerlukan pelincir suhu tinggi dan penyahterapan haba 15%.

Kotak Gear Cacing Siri NMRV / NRV

Terdapat dalam saiz bingkai 025 hingga 150. Nisbah pengurangan peringkat tunggal 5:1 hingga 100:1. Tork output sehingga 4,200 N·m. Perumah aluminium atau besi mulur. Bebibir motor IEC B5/B14. Piawaian IP65, IP66/IP67 pilihan. Pelinciran minyak sintetik atau mineral.

Piawaian Pematuhan & Kualiti

Kajian Kes

Kotak gear cacing siri NMRV / NRV — saiz bingkai 025 hingga 150, dikeluarkan mengikut ISO 9001:2015

Mengapa Pilih Kami?

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