Danfoss Gear Pump shhark Data sheet
Data Sheet
Gear Pump
shhark® Low Noise
In the mobile market, the requirement for low noise
cabs is increasing for a variety of reasons:
•
Noise regulations are becoming more demanding
all over the globe to protect operator health and
comfort
•
Noise emitted is one of the key buying factors for
end-users
•
Electrification trend: as drivetrains in general get
quieter, the noise emitted by gear pumps becomes
more noticeable
Apart from the combustion engine and fan drive
system, the steering pump is the most important
source of noise in the cab. Low noise gear pumps are
becoming an important tool for achieving operator
noise requirements in off-highway mobile
application. shhark® is the answer of Danfoss to this
requirement.
Features
The gears of the shhark® pump are covered
by multiple Danfoss patents. shhark
innovative technology has almost twice
the number of teeth of a standard gear
pump of the same frame size and it has
also a small helix angle, so that shhark
pumps are able to do the following:
•
reduce the flow pulsation by a stunning
78%
•
reduce the noise emissions by up to 10
dB(A) on average compared to standard
gear pumps
•
produce better sound quality than dual
contact flank gear pump technologies
because the frequency of noise
emission is lower
The human ear is more sensitive to
‒
noise emitted at high frequencies,
therefore the lower the noise
frequency, the higher the sound
quality
•
achieve low noise and efficiency
performance even after thousands of
®
®
hours of heavy duty operation in the
field
•
achieve higher efficiency than a
standard gear pump due to a higher
number of sealing teeth
•
for the same external dimensions,
shhark® pumps have a higher, more
consistent output flow than a standard
gear pump due to a higher average flow
by 2.7%
Advantages
1. Higher sound quality than other low
noise gear pump technologies →
better comfort for the operator
2. Cost, weight and bulk savings by
eliminating secondary noise reduction
measures→ cost saving
3. Helps meet legal NVH (noise, vibration,
harshness) requirements → noise
regulation compliance
4. Drop in compatibility with all Danfoss
external gear pumps → compactness
5. For electric mobile machines, the noise
emitted by the steering gear pump
becomes more noticeable than for
diesel engine machines, thus
increasing the need for low noise gear
pumps → suitable for electric
machines
Comprehensive technical literature is
online at www.danfoss.com
©
Danfoss | April 2021 AI319775892691en-000104 | 1
Noise level @ 3000 rpm 50˚C
Sound pressure [dB(A)]
Typical applications
•
Tractors
•
Wheel loaders
•
Forklifts
•
Telehandlers
•
Indoor lift trucks
•
Aerial work platforms
•
Waste compactors
•
Combines and harvesters
•
Cab equipped mobile machines
•
Hydraulic steering systems
•
Hydraulic power packs
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already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
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2 | © Danfoss | April 2021 AI319775892691en-000104
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