Quality
Waterjet Newsletter – 03/21/2006
A Non-conventional Design of Intensifier Pumps One of our goals in publishing
these short articles is to rediscover great ideas buried in time. In this
issue your attention is directed to a non-conventional intensifier design
reported by Bowen * 34 years ago. This design used a cam to time the
stroking of the two plungers (see diagram below). A pre-compression stroke
driven by the cam allows one cylinder starts discharging fluid when the other
one stops. Test results with just a short tubing between the two cylinders
showed that the pressure fluctuation was within 150 psi
for an output pressure of 30,000 psi. Tests have
been done from 15,000 to 60,000 psi.
A special dynamic seal design was
also used. A separate seal fluid, which becomes more viscous as the pressure
is increased, was pumped, at a higher pressure, into the dynamic seal
assembly to create a seal for water and a hydrostatic bearing to center the
piston in the cylinder. Test with this seal design along with tungsten
carbide plunger/bushings was run at 45,000 psi for
2,000 hours. A four-way valve design with an
open center and two different designs of check valves were also discussed in
this paper. * Bowen, John, “An approach to pulseless
packingless pumping.” Proceedings of the First
International Symposium on Jet Cutting Technology, Beyond High
Pressure · CTC Pressure Products Inc, Specializing in coned
and threaded high pressure products, offers the waterjet blasting and
waterjet cutting markets a complete line of high pressure valves, fittings,
tubing and accessories in maximum allowable working pressure ranges to
100,000 PSI (6,895 bar) in tube connection sizes from 1/8” (3.2mm) O.D. to 1”
(25.4mm) O.D. For “competitive” pricing and information, please call 1-814-835-3600,
email sales@ctcpressureproducts.com
or visit us at www.ctcpressureproducts.com. |
|
QualJet
LLC
Quality Waterjet Spare Parts Specialist · Quality
Waterjet Spare Parts o Meets/exceeds
OEM standards o 30%
longer operation life time than competing products · Extensive
Parts Coverage for: o Flow
style, IR Style o 40K/55K
pumps o Intensifiers
o On/off
valves o Cutting
head o Swivels · OEM
Expert o 20+
year waterjet OEM experience (via OH Precision) o Accept
small OEM order Durable, Compact 40K
PSI Pumps
· Long
operation lifetime · Highly
cost-effective · Light
weight and compact · Contact
us for o
Custom power end o
50K psi models o
Private labeling o
Custom design QualJet LLC
1-866-QUALJET (782-5538) Fax: 425-378-7776 Email: info@qualjet.com Website: www.qualjet.com To unsubscribe the
newsletter: unsubscribe@qualjet.com For newsletter archive: www.qualjet.com/Newsletter.htm
Copyright ©2005, QualJet LLC |
|
|
