Double angle seal forming lubricant film

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865002

Ernst, William D ^[1]

---

1. Troy, NY

A lubricated piston rod seal which inhibits gas leaking from a high pressure chamber on one side of the seal to a low pressure chamber on the other side of the seal. A liquid is supplied to the surface of the piston rod on the low pressure side of the seal. This liquid acts as lubricant for the seal and provides cooling for the rod. The seal, which can be a plastic, elastomer or other material with low elastic modulus, is designed to positively pump lubricant through the piston rod/seal interface in both directions when the piston rod is reciprocating. The capacity of the seal to pump lubricant from the low pressure side to the high pressure side is less than its capacity to pump lubricant from the high pressure side to the low pressure side which ensures that there is zero net flow of lubricant to the high pressure side of the seal. The film of lubricant between the seal and the rod minimizes any sliding contact and prevents the leakage of gas. Under static conditions gas leakage is prevented by direct contact between the seal and the rod.

• DOE Contract Number: DEN3-32
• Assignee: Mechanical Technology Incorporated (Latham, NY)
• Patent Number(s): US 4448424
• OSTI ID: 865002
• Country of Publication: United States
• Language: English

Related Subjects

double
angle
seal
forming
lubricant
film
lubricated
piston
rod
inhibits
gas
leaking
pressure
chamber
liquid
supplied
surface
provides
cooling
plastic
elastomer
material
elastic
modulus
designed
positively
pump
interface
directions
reciprocating
capacity
ensures
zero
net
flow
minimizes
sliding
contact
prevents
leakage
static
conditions
prevented
direct
rod seal
gas leakage
pressure chamber
direct contact
piston rod
provides cooling
sliding contact
elastic modulus
lubricant film
gas leak
gas leaking
net flow
seal form
/277/