Low Speed DSN Backstop

1. Features of DSN backstop

A) Easy Installation & Disassembling:

     Quick disconnect mounting pins for fast torque arm installation and removal

B) Reliable Lubrication:

     a. Unique sealing design: Using dual lipped seals and ring to seal. Dual lipped seals can effectively avoid internal oil leakage. Dust ring can prevent outside dust from contacting oil seal to provide prolonged life in hostile environments.

     b. Thorough system design: Inner cam can rotate freely with shaft. Contact-sealed splash circulation can lubricate and protect work piece and minimize wear and tear. Multiple oil drain plug can ensure the installation of backstop be mounted at any desired angle. Filtered breather, oil sight gauge and purgeable grease-cavities provide a complete self-lubricating system, which shortens maintenance time.

C) Longer Service Life:

     Unique design of cylindrical rollers and wedge action weaken the backstopping contact stress, which increase life.

2. Application of DSN backstop 

    The DSN backstop is extensively used in inclined belt conveyor, bucket elevators and etc. to arrest the rolling back of the machine in case of power off or sudden stoppage of the equipment due to any reason, thereby avoiding the accident because of the material being transported fall-off the machine.

3. Models of DSN backstop and parameters

4. Details of DSN backstop

A) How it works:

     Several irregular blocks are arranged regularly between outer ring and inner ring. When the inner ring is rotating in the working direction, the irregular blocks contact with the outer ring and inner ring gently. When the inner ring rotates in the counter-working direction, irregular blocks will be deflect driven by spring force and wedge outer ring and inner ring closer together to afford backstop torque.

B) Installation size:

C) The Design of Iron Block:

Iron block is used to locate torque arm. It must have enough resistance to shear strength (pressure). When user selected arm length is different, the force taken by iron block also changes. The pin hole on the iron block must be long and be installed at the same direction of torque arm, to relieve backstop outer race from undue parallel forces. When backstopping, the pin on the iron block has no force affected. Its function at this time is to prevent reverse rotation at normal runtime.

Clearance: the clearance between backstop torque arm bottom and stirrup surface is recommended to be 8-12 mm. 

D) Customize your product

        Beijing Baska Guanhua Technology Co., Ltd was established in Beijing on 28th March, 2013. It is a wholly-owned subsidiary of Tonghua Mining Machinery Co., Ltd-a professional mining machinery supplier in China. Tonghua was founded in 1998 and is located in Datong, Shanxi province, which is a professional manufacturer engaged in the research, development, production, sale and service of belt conveyor, scraper conveyor, couplings, backstop for belt conveyor and coal washing equipment, etc. It occupies an area of 161,334m2 and has more than 2,200 employees.

        We have excellent teams who focus on product design & development, quality control & inspection and company running. We also have a large-scale production capacity. Every year we normally produce about 600 sets of belt conveyors, 100 sets of scraper conveyors and 90 sets of coal washing equipment, etc. In 2006, Tonghua gained both ISO 9001 International Quality Certificate and ISO 14001 International Environmental Certificate and had established a comprehensive modern enterprise management mode. For a dozen years we have consistently followed the fundamental principles of survival starts from quality, benefits derive from management and development comes from trust.

Pictures of our factory
 

Certification

 *Drum Gear Coupling       *Grid Coupling               *Vibrating Screen             *Roller Idler