Systems and methods for flexure-based bearing mounting
A bearing assembly for a linear electromagnetic machine includes a sleeve having a surface configured to provide a bearing between the surface and a translator, a front plate coupled to the sleeve, a support block, and a plurality of flexures coupled to the support block. Each flexure is coupled between the support block and one of the front plate or a stator. For example, a load path extends from a stator to the support block via a first set of flexures of the plurality of flexures, from the support block to the front plate via a second set of flexures of the plurality of flexures, and from the front plate to the sleeve. In the example of four flexures, two flexures are affixed to the support block and front plate, while two other flexures are affixed to the support block and the stator.
1. A bearing assembly for a linear electromagnetic machine (LEM), the bearing assembly comprising:
a sleeve comprising a surface configured to provide a bearing between the surface and a translator;
a front plate coupled to the sleeve;
a support block; and
a plurality of flexures coupled to the support block, wherein each flexure of the plurality of flexures is coupled between the support block and one of the front plate or a stator, and wherein a load path extends from:
the stator to the support block via a first set of flexures of the plurality of flexures;
the support block to the front plate via a second set of flexures of the plurality of flexures; and
the front plate to the sleeve.
2. The bearing assembly of claim 1 , further comprising at least one hub affixing the sleeve to the front plate.
3. The bearing assembly of claim 1 , wherein the surface is configured to provide a gas bearing between the surface and the translator during operation.
4. The bearing assembly of claim 1 , further comprising an outer sleeve that forms one or more gas passages for providing gas to a gas bearing adjacent to the surface.
5. The bearing assembly of claim 1 , the plurality of flexures comprising:
two first flexures arranged at a first azimuthal position and a second azimuthal position of the bearing assembly and affixed to the support block and to the front plate; and
two second flexures arranged at a third azimuthal position and a fourth azimuthal position of the bearing assembly and affixed to the support block and the stator.
6. A stator assembly of a linear generator, the stator assembly comprising:
a stator configured to electromagnetically interact with a translator;
at least one bearing assembly coupled to the stator, each bearing assembly comprising:
a plurality of flexures that couple a sleeve to the stator,
a front plate, and
a support block, wherein:
each flexure of the plurality of flexures is coupled between the support block and one of the front plate or the stator;
each flexure is configured to allow pitch or yaw of the sleeve;
the sleeve interfaces with the translator, and a load path extends from:
the stator to the support block via a first set of flexures of the plurality of flexures;
the support block to the front plate via a second set of flexures of the plurality of flexures; and
the front plate to the sleeve.
7. The stator assembly of claim 6 , wherein:
the sleeve comprises a surface; and
the surface interfaces with the translator.
8. The stator assembly of claim 7 , wherein the surface provides a gas bearing with the translator during operation.
9. The stator assembly of claim 6 , the plurality of flexures comprising:
two first flexures arranged at a first azimuthal position and a second azimuthal position of the at least one bearing assembly and affixed to the support block and to the front plate; and
two second flexures arranged at a third azimuthal position and a fourth azimuthal position of the at least one bearing assembly and affixed to the support block and the stator.
10. The stator assembly of claim 6 , wherein the bearing assembly further comprises at least one hub affixing the bearing sleeve to the front plate.
11. The stator assembly of claim 6 , further comprising an outer sleeve that forms one or more gas passages for providing gas to a gas bearing adjacent to a surface of the sleeve.
12. A linear electromagnetic machine (LEM) comprising:
a stator comprising a plurality of phases;
a translator that moves along the stator and electromagnetically interacts with the plurality of phases; and
at least one bearing assembly coupled to the stator, each bearing assembly comprising a plurality of flexures that couple a sleeve, interfacing to the translator, to the stator, wherein each flexure allows pitch or yaw, wherein the at least one bearing assembly comprises:
a front plate; and
a support block, wherein each flexure of the plurality of flexures is coupled between the support block and one of the front plate or the stator, wherein a load path extends from:
the stator to the support block via a first set of flexures of the plurality of flexures;
the support block to the front plate via a second set of flexures of the plurality of flexures; and
the front plate to the sleeve.
13. The LEM of claim 12 , wherein:
the at least one bearing assembly comprises a first bearing assembly and a second bearing assembly;
the first bearing assembly is arranged at a first axial end of the stator; and
the second bearing assembly is arranged at a second axial end of the stator.
14. The LEM of claim 12 , wherein the at least one bearing assembly provides at least one gas bearing at a respective interface with the translator.
15. The LEM of claim 7 , the plurality of flexures comprising:
two first flexures arranged at a first azimuthal position and a second azimuthal position of the at least one bearing assembly and affixed to the support block and to the front plate; and
two second flexures arranged at a third azimuthal position and a fourth azimuthal position of the at least one bearing assembly and affixed to the support block and the stator.