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KR-102963696-B1 - Degassing system and method

KR102963696B1KR 102963696 B1KR102963696 B1KR 102963696B1KR-102963696-B1

Abstract

A degassing device comprises a gas nucleation medium and a porous barrier. The degassing device may comprise a growth medium between the gas nucleation medium and the porous barrier. The degassing device may be part of a system for removing gas from a fluid, the system comprises a tank having a fluid inlet and a fluid outlet and has a fluid flow path from the fluid inlet to the fluid outlet, and the degassing device is located within the fluid flow path. A method for removing gas from a fluid comprises the step of passing the fluid through a degassing device that forms a fluid flow path.

Inventors

  • 크로닌, 마이클 제이.
  • 구스타프손, 마이클 제이.
  • 카푸어, 비제이 케이.
  • 매드센, 마이크 제이.
  • 프렘젠, 다니엘 알.
  • 모라벡, 데이비스 비.
  • 고에르츠, 매튜 피.
  • 판차나탄, 디브야

Assignees

  • 도날드슨 컴파니, 인코포레이티드

Dates

Publication Date
20260512
Application Date
20200128
Priority Date
20190129

Claims (20)

  1. Gas nucleation medium; A growth medium adjacent to the gas nucleation medium and downstream of the gas nucleation medium; and It includes a porous barrier adjacent to the growth medium and downstream of the growth medium, The above gas nucleation medium is a degassing device having a basic fiber surface area of at least 10 m² / m² when measured by the Carmen-Kozeny method and an intermediate pore size of 30 μm or less when measured by ASTM F316.
  2. In paragraph 1, A degassing device further comprising a gap between the growth medium and the porous barrier.
  3. In paragraph 1 or 2, A degassing device comprising a gas nucleation medium having an oil contact angle of at least 30° and a polygenic material having a polygenic grade of 1 or more when measured by AATCC method 118.
  4. In paragraph 1 or 2, The above porous barrier is a degassing device comprising an opening having a size of 250 μm or less.
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Description

Degassing system and method Cross-reference regarding related applications This application claims priority to U.S. Provisional Application No. 62/798,272 filed on January 29, 2019, the entire contents of which are incorporated herein by reference. Technology field The present invention relates to a system and method for degassing a fluid. In various systems utilizing fluids, removing air from the fluid (e.g., degassing) can be advantageous. In particular, in systems where the same fluid is maintained within the system for a specified period, air can accumulate within the fluid. For example, in systems where the fluid circulates multiple times through the system, such as hydraulic systems, air can accumulate within the fluid, which can degrade the system's performance. Hydraulic systems, and specifically hydraulic machines, rely on hydraulic fluid to perform their tasks. Common examples of hydraulic systems include hydraulic machines, hydraulic drive systems, hydraulic transmission systems, and hydraulic brakes. Because hydraulic fluid is typically maintained within the system for a set period of time and undergoes periods of high pressure and low pressure, air can accumulate within the fluid. Air within the fluid can exist in various forms, including dissolved air and free air. Free air may include entrained air and bubbles. The presence of air can cause pump cavitation, accompanied by signs such as component wear, increased noise, or a decrease in the fluid bulk modulus, which can consequently lead to reduced efficiency and controllability of the hydraulic system. It would be desirable to provide a system and method for degassing a fluid. In addition, it would be desirable to provide a system and method for degassing a hydraulic fluid that is compatible with a hydraulic system. FIG. 1 is a schematic flowchart of a hydraulic system according to an embodiment. FIGS. 2a to 2d are schematic cross-sectional views of a degassing unit used in the hydraulic system of FIG. 1 according to an embodiment. FIG. 3 is a schematic cross-sectional view of a degassing unit used in the hydraulic system of FIG. 1 according to an embodiment. FIG. 4 is a graphic representation of the data collection settings used in the embodiment. FIGS. 5a to 5c are graphic representations of the results of Example 1. FIGS. 6a to 6c are graphic representations of the results of Example 2. FIGS. 7a to 7d and FIGS. 8a to 8d are graphic representations of the results of Example 3. Figures 9a and 9b are graphic representations of the results of Example 4. FIGS. 10a and FIGS. 10b are graphic representations of the results of Example 6. Figures 11a and 11b are graphic representations of the results of Example 7. The present disclosure relates to a system and method for removing a gas, such as air, from a fluid. The system and method of the present disclosure are particularly useful for removing air (e.g., degassing) from a fluid used in a recirculating system, such as a hydraulic system. The term "fluid" is used in this disclosure to describe a substance in the liquid phase. The fluid may have dissolved or accompanying gaseous compounds within it. The term "deaerate" or "deaerate" refers herein to the removal of air or any other gas from a fluid. The term "adjacent" is used herein with the meaning of "next to." An "adjacent" feature may or may not be in contact with an adjacent feature. For example, "adjacent" features may be separated by a gap. The term "immediately adjacent" is used herein to mean contact with an adjacent feature. The term "immediately adjacent" may be used to indicate that there is no interposed feature. The term "substantially" as used herein has the same meaning as "considerably" and may be understood as changing the subsequent term by at least about 75%, at least about 90%, at least about 95%, or at least about 98%. The term "not substantially" as used herein has the same meaning as "not considerably" and may be understood as having the opposite meaning of "substantially," that is, changing the subsequent term by about 25% or less, 10% or less, 5% or less, or 2% or less. In the context of mesh size, pore size, fiber diameter, or wire diameter, the term “nominal” is used herein to refer to the indicated or recorded mesh or pore size of commercially available products. The unit "psi" is used herein to refer to a force of pounds per square inch. (1) psi is equal to about 6900 Pascal, or about 6.9 kPa. Any reference to standard methods (e.g., ASTM, TAPPI, AATCC, etc.) refers to the most recently available version of the method at the time of filing of this disclosure, unless otherwise indicated. The term "approximately" is used herein with numerical values to include normal measurement variations predicted by those skilled in the art, and is understood to have the same meaning as "approximately" and to include typical error limits, such as ±5% of the mentioned value. Singular terms (e.g., "a," "an," and "the") are not intended to