Degasifying apparatus

Patent metadata

Field	Value
Publication number	US-10717025-B2
Application number	US-201615769108-A
Country	US
Kind code	B2
Filing date	Sep 23, 2016
Priority date	Nov 10, 2015
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

Degasifying apparatus is for eliminating gases, such as ambient air, from fluids, such as oil. The apparatus has at least one permeable membrane ( 26 ) that lets the gas to be eliminated from the fluid ( 22 ) penetrate through the permeable membrane and retains the liquid moiety of the fluid within the permeable membrane.

First claim

The invention claimed is:

1. A degasifying apparatus for eliminating a gas from a fluid having the gas in a liquid, the degasifying apparatus comprising:
a container having a permeable membrane separating a gas chamber from a fluid chamber in said container, said permeable membrane allowing the gas to be removed from the fluid in the fluid chamber to pass through said permeable membrane into said gas chamber and retaining the liquid of the fluid in the fluid chamber without passing through said permeable membrane, said fluid chamber having a fluid inlet and a fluid outlet;
an energy recovery device including low-pressure and high-pressure accumulators connected to liquid sides thereof to a hydrostatic drive, said fluid chamber being connected in fluid communication with said liquid side of said low-pressure accumulator to degasify the fluid on a low-pressure side of said energy recovery device; and
a transport device connected in fluid communication with said fluid outlet between said container and said liquid side of said low-pressure accumulator, said transport device being a spring-loaded differential piston pump or a Venturi nozzle.

2. A degasifying apparatus according to claim 1 wherein
said transport device is said spring-loaded differential piston pump operable in a four-quadrant mode.

3. The degasifying apparatus according to claim 1 wherein
the gas is air; and
the liquid is oil.

4. The degasifying apparatus according to claim 1 wherein
said permeable membrane comprises a silicone material.

5. The degasifying apparatus according to claim 1 wherein
said permeable membrane consists entirely of silicone.

6. The degasifying apparatus according to claim 1 wherein
said permeable membrane rests against a support body having passages or pores with free cross sections permitting gas to permeate through said support body.

7. The degasifying apparatus according to claim 6 wherein
said support body is at least one of a wire gauze, a sintered metal, a plastic material or a ceramic material.

8. The degasifying apparatus according to claim 6 wherein
said support body and said permeable membrane comprises a fluid guide.

9. The degasifying apparatus according to claim 1 wherein
said permeable membrane has a permeation coefficient value between 200 and 600×10 −17 m 2 /s/Pa.

10. The degasifying apparatus according to claim 9 wherein
said permeable membrane has a permeation coefficient value between 300 and 400×10 −17 m 2 /s/Pa.

11. The degasifying apparatus according to claim 10 wherein
said permeable membrane has a permeation coefficient value between 370 and 380×10 −17 m 2 /s/Pa.

12. The degasifying apparatus according to claim 1 wherein
said transport device is a first spring-loaded differential piston pump having a piston with a larger piston face subjected to pressure of said low-pressure accumulator.

13. The degasifying apparatus according to claim 1 wherein
said gas chamber of said container has ambient pressure therein.

14. The degasifying apparatus according to claim 1 wherein
said gas chamber of said container is connected in fluid communication to a suction device.

15. The degasifying apparatus according to claim 14 wherein
said transport device is a first spring-loaded differential piston pump having a piston with a larger piston face subjected to pressure of said low-pressure accumulator; and
said suction device comprises a second spring-loaded differential piston pump having a piston with a larger piston face subjected to pressure of said low-pressure piston accumulator and being pressure-synchronized with said first spring-loaded differential piston pump in movement thereof.

16. The degasifying apparatus according to claim 1 wherein
said transfer device is a Venturi nozzle.

17. The degasifying apparatus according to claim 11 wherein
said Venturi nozzle is connected in fluid communication to said low-pressure accumulator, said high-pressure accumulator and said fluid chamber.

Assignees

• Hydac Technology Gmbh

Inventors

• Koehne Jens Holger
• Kloft Peter
• Baltes Herbert

Classifications

• B01D69/108

  Inorganic support material · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title

• B01D2325/20

  Specific permeability or cut-off range · CPC title

• F15B21/044

  Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding · CPC title

• F16H61/4174

  Control of venting, e.g. removing trapped air · CPC title