AAK changed hydraulic directional control valve design and solved vibration

Hunter is an old purchaser of EAGLE PRO company in Canada. It has been several
years since he purchased hydraulic directional control valves from AAK. In the
second half of last year, Hunter emailed that he would become the general
manager of Hangzhou branch in a month and visit AAK. Hunter has been engaged in
procurement for 5 or 6 years. This promotion must be due to outstanding
contributions. Some time ago, their company developed a batch of hydraulic
cylinders, which vibrated greatly during commissioning. Their engineer thought
that there was a problem with the hydraulic directional control valve, but the
hydraulic directional control valve was normal when tested separately. The
engineer was confused, and the boss was also very anxious. He asked hunter to
consult the manufacturer of hydraulic directional control valves.

This hydraulic directional control valve is produced by a local factory in
Canada. After on-site analysis, the engineer of the original factory thinks
that the vibration is caused by the sharp change of oil port pressure during
the reversing of the hydraulic directional control valve. It can be solved by
changing the hydraulic manifold design. The engineer's scheme is to connect two
small adjustable one-way throttle valves in series on the control oil circuit
at both ends of the hydraulic direction control valve. After 20 days, according
to the plan of the original hydraulic directional control valve manufacturer,
there was no vibration. The boss was very happy and let Hunter be promoted.
Knowing that the installation of two throttle valves has increased their cost
by 20%, I wonder if there is any other scheme. After getting their hydraulic
direction control valve drawings, hydraulic manifold drawings and the hydraulic
schematic diagram of the system, AAK engineers began to analyze.

Three days later, AAK's scheme came out. The shoulder of the hydraulic
directional control valve spool table was redesigned and a triangular
throttling groove was added to avoid the sharp change of oil port pressure
during reversing. This new design does not change the production cost of the
hydraulic directional control valve, that is, it solves the vibration at zero
cost. Hunter was a little incredible and asked AAK to immediately sample the
new hydraulic direction control valve. One month later, the hydraulic
directional control valve of AAK sample was sent out. After commissioning,
there is no vibration, but the cost is zero. Hunter's boss happily saved 20% of
the cost and asked hunter to always send inquiry for any hydraulic directional
control valves to AAK at the first time.

The design of hydraulic directional control valve runs through the whole
process of design, manufacturing, use and maintenance. A good hydraulic
directional control valve design cannot be separated from manufacturing. AAK
engineers consider not only manufacturing, but also the function and
performance of the hydraulic directional control valves, even innovation. The
innovation of this hydraulic directional control valve adds a new element of
triangular throttling groove on the original basis.

Hunter privately informed that the boss was very satisfied that he solved the
problem with 0 cost. He deserved the position of general manager of Hangzhou
branch, and he worked harder and harder.

AAK hydraulic directional control valve, advanced to solve problems with 0
cost, you can also have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-directional-control-valve-
aak239

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