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US 11,692,557 B2Granted
Step seal for refrigerant compressors
AssigneeDanfoss A/S
InventorsJames Wilson, Jin Yan, Lin Xiang Sun, Ruiguo Gao, Brenden Richman
Life of this patent
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Abstract
In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.
Claims10
A refrigerant compressor, comprising:
- a stator;
- a rotor configured to rotate with respect to the stator;
- and at least one step seal between the rotor and the stator, wherein the step seal comprises a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°, wherein the downstream surface and the upstream surface meet at a curved surface to form a rotor cavity, wherein the rotor cavity is defined by the downstream surface, the upstream surface, and the curved surface, wherein the upstream surface projects from the curved surface to a first point of the first tooth in a direction having a radially outward component and axially upstream component, wherein the downstream surface projects from the curved surface to a second point of the second tooth in a direction having a radially outward component and an axially downstream component, wherein the first and second points are arranged at a common radial position, wherein a stator cavity is arranged in the stator, wherein the stator cavity is arranged axially between the first tooth and the second tooth, wherein the stator cavity is a reflection of the rotor cavity about a plane arranged radially between the rotor and stator cavities and extending parallel to the axis of rotation of the rotor.
A refrigeration system, comprising:
- a condenser;
- an evaporator;
- an expansion device;
- and
- a compressor, wherein the compressor includes a stator, a rotor configured to rotate with respect to the stator, and at least one step seal between the rotor and the stator, wherein the step seal comprises a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°, wherein the downstream surface and the upstream surface meet at a curved surface to form a rotor cavity, wherein the rotor cavity is defined by the downstream surface, the upstream surface, and the curved surface, wherein the step seal further comprises a stator cavity formed in the stator and axially aligned with the rotor cavity, wherein the stator cavity is a reflection of the rotor cavity about a plane arranged radially between the rotor and stator cavities and extending parallel to an axis of rotation of the rotor.
2 more elements
Dependencies are inferred from the claim text.