Reciprocating cylinder liner seal assembly

Patent metadata

Field	Value
Publication number	US-9976452-B1
Application number	US-201615339802-A
Country	US
Kind code	B1
Filing date	Oct 31, 2016
Priority date	Oct 31, 2016
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A reciprocating cylinder seal assembly has an elastomeric seal with a radially inwardly directed oil sealing lip and a radially inwardly directed gas sealing lip, wherein both lips are in elastomeric-to-metal sealing contact with a reciprocating engine liner. The assembly further has a U-shaped seal retainer that is attached to the elastomeric seal, where the U-shaped seal retainer is placed in direct intimate contact with a cylindrical engine housing. The U-shaped seal retainer and a reciprocating engine housing may be separated by and be in contact with a major portion of a J-shaped gas shield with a hook portion that is located between the oil sealing lip and a manifold port, where the hook portion of the J-shaped gas shield has a metal backer ring embedded in it.

First claim

What is claimed is:

1. A reciprocating cylinder seal assembly, comprising:
an elastomeric seal with a radially inwardly directed oil sealing lip and a radially inwardly directed gas sealing lip, wherein both lips are in elastomeric-to-metal sealing contact with a reciprocating engine liner; and
a U-shaped seal retainer disposed on the elastomeric seal, wherein the U-shaped seal retainer is in direct intimate contact with a cylindrical engine housing;
wherein the U-shaped seal retainer comprises steel and is of a unitary, one-piece construction.

2. The reciprocating cylinder seal assembly of claim 1 , wherein the reciprocating engine liner is in sliding contact with the cylindrical engine housing, at an inside diameter ID of the cylindrical engine housing.

3. The reciprocating cylinder seal assembly of claim 1 , wherein pressurized oil is present on a side of the oil lip that is axially away from the gas lip, and unrestricted manifold pressure is present on a side of the gas lip away from the oil lip.

4. The reciprocating cylinder seal assembly of claim 1 , wherein the U-shaped retainer comprises an inner member, an outer member, and a connecting member.

5. The reciprocating cylinder seal assembly of claim 4 , wherein the U-shaped retainer is disposed on a portion of the elastomeric seal, by way of the inner member.

6. The reciprocating cylinder seal assembly of claim 4 , wherein the inner member is parallel to and slightly shorter than the length of the outer member, the connecting member is essentially perpendicular to both the inner member and the outer member, and all three members have an equivalent thickness;
wherein each of the inner and the outer members has a tapered end, and a tapered edge of the U-shaped retainer is co-planar and flush with the radial edge of an upper elastomeric surface.

7. The reciprocating cylinder seal assembly of claim 1 , wherein the elastomeric seal is structured with a curved arc gap between the oil sealing lip and the gas sealing lip, and the elastomeric seal is further structured with a truncated trapezoidal gap from the oil sealing lip to the right axial end of the elastomeric seal.

8. The reciprocating cylinder seal assembly of claim 1 , wherein the U-shaped retainer with the elastomeric seal attached, is pressed into intimate direct contact with the cylindrical engine housing, at the surface.

9. The reciprocating cylinder seal assembly of claim 8 , wherein the direct intimate contact between the U-shaped seal retainer and the cylindrical engine housing is further made with a connecting member of the U-shaped seal retainer.

10. The reciprocating cylinder seal assembly of claim 1 , wherein the U-shaped retainer provides eccentricity tolerance of the radial movement of the reciprocating liner, so as to absorb a portion of the radial component of the energy produced by the cylinder reciprocating engine liner and to contain exhaust gasses.

11. The reciprocating cylinder seal assembly of claim 1 , wherein the U-shaped seal retainer, in conjunction with the lips contain exhaust gasses and are eccentricity tolerant of the radial movement of the reciprocating engine liner, so as to control run out of the reciprocating engine.

12. The reciprocating cylinder seal assembly of claim 1 , wherein maximum run out of the liner is in the order of 0.150 mm from 0.05 mm tipping due to running clearance plus thermal growth, plus 0.025 mm axis offset due to glide circularity and run out tolerances, plus 0.06 mm due to axis offset due to block core run out tolerances, plus 0.015 mm due to valve roundness.

13. A reciprocating cylinder seal assembly comprising:
an elastomeric seal having a radially inwardly directed oil sealing lip and a radially inwardly directed gas sealing lip in contact with a reciprocating engine liner;
a U-shaped seal retainer axially disposed upon a radially outward surface of the elastomeric seal; and
a major portion of a J-shaped gas shield located between the U-shaped valve seal retainer and an engine reciprocating engine housing, a hook portion of the J-shaped gas shield is located between the oil sealing lip and a manifold port;
wherein the hook portion of the J-shaped gas shield has a metal backer ring embedded therein;
wherein the U-shaped seal retainer comprises steel and is of a unitary, one-piece construction.

Assignees

• Dana Automotive Systems Group

Inventors

• Buuck Glenn
• Heller Thomas G

Classifications

• F01L7/02

  with cylindrical, sleeve, or part-annularly shaped valves (of disc type F01L7/06; of conical type F01L7/08) · CPC title

• F01L7/16

  Sealing or packing arrangements specially therefor · CPC title

• F01L5/04

  with cylindrical, sleeve, or part-annularly shaped valves · CPC title

• F01L5/12

  Arrangements with part-annularly-shaped valves · CPC title

• F16J15/3232 Primary

  having two or more lips · CPC title