【Suspended centrifuge】Centrifuge special introduction-Hezhong Environment (Beijing) Co., Ltd. was established in 2003

Blog

Home page

【Suspended centrifuge】Centrifuge special introduction

Published Time:

2023-06-27

Source:

Author:

Suspended centrifuges are a type of intermittent gravity, mechanical, or manually discharged centrifuge that appeared after tripod centrifuges. They are divided into two types: filtering and sedimentation.

Suspended centrifuges have good adaptability to the separated suspension. They unload the filter cake at shutdown or low speed, causing less breakage of crystalline solid particles. They are suitable for material separation that requires maintaining the crystalline form of the solid, and their application range is basically the same as that of tripod centrifuges.

Suspended centrifuges mostly use multi-speed motors or DC motors, and can adopt fully automatic or semi-automatic operation methods such as electrical, pneumatic, or hydraulic combined control.

0 1 Working principle of suspended centrifuge

The structural difference between a suspended centrifuge and a tripod centrifuge lies in the fact that the drum is fixed to the lower end of a longer main shaft (flexible shaft), and the upper end of the main shaft is equipped with a bearing seat and suspended on the hinged support of the frame. The hinged support contains an elastic (made of rubber material) buffer ring to reduce machine vibration. The rotation of the centrifuge drum is similar to that of a tripod centrifuge, and is also directly connected to the vertical motor through a clutch and the main shaft. The working principle of the suspended centrifuge is the same as that of the tripod centrifuge.

0 2 Types and operation methods of suspended centrifuges

Suspended centrifuges have a simple structure, stable operation, and can be easily manually unloaded from the bottom. Mechanical or gravity automatic unloading can also be used. Because a flexible, slender shaft is used to suspend the drum, in order to reduce the additional radial load on the main shaft during scraping, suspended centrifuges generally use narrow scraper unloading. The unloading scraper mechanism can be divided into moving lifting narrow scraper unloading device, rotating lifting narrow scraper unloading device, and spiral scraper unloading device according to the feeding method.

0 3 Driving device of suspended centrifuge

Suspended centrifuges feed at a low speed of 100-300 r/min and separate at a full speed of 1000 r/min or 1500 r/min. When using gravity or manual unloading, the machine needs to be stopped and braked; when using a mechanical scraper for unloading, the drum speed is generally 40-80 r/min. If a special centering mechanism is provided, unloading can be performed at a higher speed (150-200 r/min), but the unloading speed should avoid the critical speed of the rotor to avoid resonance during unloading, which would increase machine vibration and noise.

Suspended centrifuges are mostly driven by four-speed (or five-speed) asynchronous motors or DC motors. Multi-speed asynchronous motors rely on changing the number of poles of the motor to accelerate or decelerate step by step. However, the acceleration and braking time of the drum must be strictly controlled during use, especially when manual operation is used, otherwise the motor is easily overheated.

Using a DC motor can obtain different speeds required for feeding, separation, and unloading. It has advantages such as lower energy consumption, smooth acceleration and braking, and constant torque, but DC motors are more expensive than multi-speed AC motors.

0 4 Suspended Selection of centrifuge models

The selection of suspended centrifuge models and filter media can refer to tripod centrifuges (friends who want to know more can check the previous article)

05 Advantages of suspended centrifuges

a. Simple structure: The structure of a suspended centrifuge is relatively simple, requiring only one top support point. Compared with bottom-mounted centrifuges, the equipment is smaller, occupies less floor space, and is easier to install.

b. Easy operation: The structure of a suspended centrifuge is relatively simple, requiring only one top support point. Compared with bottom-mounted centrifuges, the equipment is smaller, occupies less floor space, and is easier to install.

c. Good separation effect: Suspended centrifuges have a relatively good separation effect, capable of quickly and efficiently separating solid particles and suspended matter, and the separated solid particles have a higher degree of dryness.

In general, suspended centrifuges have high application value in the field of liquid-solid separation, and with the continuous development of technology, they will play a more important role in the liquid-solid separation industry.