Rotary pump having a casing being formed with a communicating hole communicating a space that is between the side plate and the wall surface of the driving machine
US-2017284398-A1 · Oct 5, 2017 · US
Vane pump
US11428222B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11428222-B2 |
| Application number | US-202017000549-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2020 |
| Priority date | Aug 29, 2019 |
| Publication date | Aug 30, 2022 |
| Grant date | Aug 30, 2022 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
A vane pump includes: a casing forming a pump chamber therein; a rotor arranged inside the casing to rotate eccentrically with respect to the casing; and a plurality of vanes configured to rotate with the rotor and slide on an inner side surface of the casing. At least one of Formula (1): l≤(b/a)×k and Formula (2): l≤(c/a)×j is satisfied, where “a” represents a height of the pump chamber, “b” represents a height of the rotor, “c” represents a height of the vane in a rotation axis direction of the rotor, and where “l” represents a linear expansion coefficient of the casing in the rotation axis direction, “k” represents a linear expansion coefficient of the rotor in the rotation axis direction, and “j” represents a linear expansion coefficient of the vane in the rotation axis direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A vane pump comprising: a casing forming a pump chamber therein; a rotor arranged inside the casing to rotate eccentrically with respect to the casing; and a plurality of vanes configured to rotate with the rotor and slide on an inner side surface of the casing, wherein at least one of Formulas (1) and (2) is satisfied, l ≤( b/a )× k , and Formula (1) l ≤( c/a )× j, Formula (2) wherein “a” represents a height of the pump chamber in a rotation axis direction of the rotor, wherein “b” represents a height of the rotor in the rotation axis direction, wherein “c” represents a height of the vane in the rotation axis direction, wherein “l” represents a linear expansion coefficient of the casing in the rotation axis direction, wherein “k” represents a linear expansion coefficient of the rotor in the rotation axis direction, and wherein “j” represents a linear expansion coefficient of the vane in the rotation axis direction. 2. The vane pump according to claim 1 , further satisfying at least one of Formulas (3) and (4), l≥ 0.9×( b/a )× k , and Formula (3) l≥ 0.9×( c/a )× j. Formula (4) 3. The vane pump according to claim 1 , wherein the rotor is controlled so that a rotation speed of the rotor is constant. 4. A vane pump comprising: a casing forming a pump chamber therein; a rotor arranged inside the casing to rotate eccentrically with respect to the casing; and a plurality of vanes configured to rotate with the rotor and slide on an inner side surface of the casing, wherein the casing is formed of a plurality of case bodies arranged in a rotation axis direction of the rotor, the plurality of case bodies are fastened and fixed by a fastening member so as to be in a pressure contact with each other in the rotation axis direction, the fastening member is arranged to extend in the rotation axis direction between both end surfaces of the pump chamber in the rotation axis direction, at least one of Formulas (5) and (6) is satisfied, m ≤( b/a )× k , and Formula (5) m ≤( c/a )× j, Formula (6) wherein “a” represents a height of the pump chamber in the rotation axis direction, wherein “b” represents a height of the rotor in the rotation axis direction, wherein “c” represents a height of the vane in the rotation axis direction, wherein “m” represents a linear expansion coefficient of the fastening member in the rotation axis direction, wherein “k” represents a linear expansion coefficient of the rotor in the rotation axis direction, and wherein “j” represents a linear expansion coefficient of the vane in the rotation axis direction. 5. The vane pump according to claim 4 , further satisfying at least one of Formulas (7) and (8), m≥ 0.9×( b/a )× k , and Formula (7) m≥ 0.9×( c/a )× j. Formula (8)
Assignees
Inventors
Classifications
Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) · CPC title
Synthetic polymers, e.g. plastics; Rubber · CPC title
similar · CPC title
Casings or housings · CPC title
- F04C2/3441Primary
the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation · CPC title
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Frequently asked questions
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- What does patent US11428222B2 cover?
- A vane pump includes: a casing forming a pump chamber therein; a rotor arranged inside the casing to rotate eccentrically with respect to the casing; and a plurality of vanes configured to rotate with the rotor and slide on an inner side surface of the casing. At least one of Formula (1): l≤(b/a)×k and Formula (2): l≤(c/a)×j is satisfied, where “a” represents a height of the pump chamber, “b” r…
- Who is the assignee on this patent?
- Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification F04C2/3441. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 30 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).