Vibration isolators for equipment & machinery

Vibration isolators spring type BLR

Manufacturer: Wibroizolacja Polska

 BLR block vibro-isolators are designed for handling heavy loads and low vibration frequencies in cases where height regulation is required (levelling).  

Design

BLR block vibro-isolators consist of two steel plates with springs mounted between (vibro-isolators from the Isotop® SD-6 to SD-9 and Isotop® DSD-6 to DSD-9 series), and level adjustment elements. Blocks with 4 or 8 springs are available, designated as BLR 4 and BLR 8 respectively. The number of springs depends on the intended load. In cases where damping is not necessary the SD springs are fitted; otherwise, DSD elements or a mix of SD and DSD springs are used. In the standard design, the steel plates are galvanised. Upon the client’s request the plates can be painted black.  

Application

Block vibro-isolators have a natural frequency within the range from 3.4 Hz for SD and  from 4,3 Hz for DSD and are used for the foundation of: 

• compressors,
• ventilators, 
• air conditioners,
• crushers,
• grinders,
• pumps,
• textile machines,
• conveyors,
• emergency power generators,
• other machines and devices, especially ones with low vibration frequency.

Information necessary for product selection:

• weight of the machine/device,
• number and positioning of the fulcrums,
• positioning of the centre of mass,
• dimensions of the machine/device,
• load direction (vertical, horizontal),
• lowest vibration frequency (No. of rotations or cycles).

Advantages:

• low height,
• low natural frequency,
• freedom of tilting in the vertical direction,
• the open design of the isolator allows for effortlessly checking the springs’ condition without the need of disassembly,
• durable and compact design. 

Our services Please make use of our knowledge and send us your inquiries. We will be happy to provide you with the information you need, carry out the necessary calculations and select the right vibro-isolators for the given equipment.

                 Selection table BLR SD

Designation	Recommended load range (kG)	Natural frequency at max. load (Hz)
BLR 4-SD-64/70	295÷780	3,4
BLR 4-SD-62/72	380÷1010
BLR 4-SD-72/821	595÷1380
BLR 4-SD-82/921	810÷1890
BLR 4-SD-80/941	900÷2100
BLR 8-SD-78/90	930÷2480
BLR 8-SD-74/841	1190÷2760
BLR 8-SD-70/881	1140÷3360
BLR 8-SD-84/941	1620÷3780
BLR 8-SD-80/981	1800÷4200

 
               Selection table BLR DSD

Designation	Recommended load range (kG)	Natural frequency at max. load (Hz)
BLR 4-DSD-64/70	305÷800	4,3
BLR 4-DSD-62/72	395÷1130	4,7
BLR 4-DSD-60/74	480÷1460	5,2
BLR 4-DSD-70/841	760÷1880	4,7
BLR 4-DSD-82/921	860÷2240	4,7
BLR 4-DSD-80/941	960÷2600	4,6
BLR 8-DSD-78/80	960÷2920	5,2
BLR 8-DSD-74/841	1240÷3120	4,8
BLR 8-DSD-70/881	1520÷3760	4,7
BLR 8-DSD-84/941	1720÷4480	4,7
BLR 8-DSD-80/981	1920÷5200	4,6

¹ deflection up to approx. 22 m

When ordering, you need to provide the full designation of the vibro-isolstor, e.g.:
BLR 8-SD-74/84

Notes about the selection table Due to the possibility of using different springs from the same series (e.g. SD 6 to SD 9) together, virtually all requirements from the nominal load values given above can be met. When ordering, you need to provide the nominal load on the vibro-isolator. We will select the right springs for you.

 

 

 

Note: Despite our greatest efforts, we cannot guarantee that the information published on this site is free of errors. Errors in the product descriptions cannot be the basis for any claims. Should you have any doubts, please contact our sales department, before deciding to purchase the product.