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US 12,146,501 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°.
Claims18
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 stator has an abradable portion, wherein the first and second teeth extend toward the abradable portion, wherein the first and second teeth are configured to contact the abradable portion and carve tracks into the abradable portion over time, and wherein each of the tracks carved into the abradable portion exhibits an axial dimension greater than an axial dimension of a tip of a corresponding one of the first and second teeth.
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 an upstream surface of the first tooth and a downstream surface of the second tooth are arranged substantially perpendicular to a radially innermost-portion of a wall of a cavity immediately adjacent one of the first and second teeth.
2 more elements
Dependencies are inferred from the claim text.