The Ingenious Use Of Safety Pins In The Low-Speed Coupling Of The Mineral Sizer

The mineral sizer is a crushing equipment widely used in mining, coal, building materials, chemical and other industries. Its main working principles are:

1. The mineral is gripped by the leading faces of opposed rotor teeth, and to be subjected to stress under the concentrated load of the rotor teeth. The stress causes the mineral to be broken along its natural texture.

2. Mineral is broken in tension by being subjected to a three-point loading, which is between the front tooth faces on one rotor and rear tooth faces on the other rotor.

3. For the mineral that has not been fully broken, through the rotor teeth and fixed teeth of the breaker bar, it can be further broken to ensure the 3D dimension requirements of the discharging material.
We, Henan Excellent Machinery Co., Ltd, are a professional manufacturer of crushing and screening equipment. After years of production experience and R & D investment, in view of the large torque of the mineral sizer and the damaged shafts and bearings, we have added a safety pin design to the low-speed coupling.
The low-speed coupling has the characteristics of adjustable axial, radial and angular displacements. Advantages compared to peers: Excellent centering effect; The shear pin has the function of protecting the power unit and is very convenient to replace; Abandon the traditional key connection (heat installation method), and adopt the expansion sleeve connection with large torque, which is convenient and quick to disassemble.

Adding a safety pin to the low-speed coupling can provide overload protection.
(1) Use the overload protection of the torque-limiting hydraulic coupling to ensure the safe and normal production of the equipment. The torque-limiting hydraulic coupling can buffer the excessive impact force and torque generated during crushing and has the function of overload protection. Through it, the load can be driven to start smoothly, improve the starting characteristics, and reduce the impact current on the power grid during startup. This component is equipped with an explosive plug with a pressure explosion-proof structure and a fusible plug with over-temperature protection. It meets the mechanical overload protection function.

(2) Shear pins and current overload protectors can be used to monitor the working status of the equipment and (through the reserved centralized control interface) to achieve remote monitoring and operation. When a large piece of iron enters and causes a stuck vehicle, the crushing tooth roller can be reversed to reverse the blocked materials to prevent the materials from getting stuck. The safety pins are custom-made from special materials from large steel mills. The mechanical properties of each item have been precisely calculated and verified in practice, fully achieving the effect of meeting the overload protection of the drive unit.
The installation of safety pins in the low-speed coupling of the mineral sizer by our company is independently developed, with completely independent intellectual property rights, and has obtained a new technology patent. It can well protect the coupling and the shaft from the physical level, avoiding shaft breakage and damage caused by excessive torque or overload.