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US 9,810,232 B2Granted
Pump unit
AssigneeGrundfos Holding A/S
InventorFinn Mathiesen Høj
Life of this patent
Estimating the term…
Abstract
A pump assembly with a stator housing (18), in whose inside a wet-running electric motor with a can (14) is arranged, and with a pump housing (2) connected to the stator housing (18). An annular shaped seal (22) is arranged between the stator housing (18) and a collar (34) of the can (14) on the one hand, and the pump housing (2) on the other hand.
Claims20
A pump assembly comprising:
- a stator housing comprising a longitudinal axis, an inside and a stator housing end portion surface at an axial end of the stator housing, the stator housing end portion surface extending in a radial direction with respect to the longitudinal axis;
- a wet-running electric motor with a can arranged in the stator housing inside;
- a pump housing connected to the stator housing;
- and
- an annular shaped seal arranged between the stator housing and a radial collar of the can, and the pump housing, the annular shaped seal comprising a shaped seal side facing away from the pump housing, the shaped seal side being in contact with the can and the stator housing end portion surface, wherein at least one of:
- in predetermined peripheral sections, free spaces are present between the inner periphery of the shaped seal and a radially inwardly oppositely lying wall of the can;
- and
- in predetermined peripheral sections, free spaces are present between the outer periphery of the shaped seal and a radially outwardly oppositely lying wall of the pump housing,
- wherein said free spaces are designed in a manner such that the shaped seal can expand into the free spaces with an axial compression.
6 more elements
A pump assembly comprising:
- a stator housing comprising a stator housing end portion and a stator housing inside, said stator housing end portion comprising a stator housing end portion surface;
- a wet-running electric motor comprising a can arranged in the stator housing inside;
- a pump housing connected to the stator housing;
- and
- an annular shaped seal arranged between the stator housing, a radial collar of the can and the pump housing, the annular shaped seal comprising a shaped seal longitudinal axis, a first shaped seal side surface and a second shaped seal side surface, said first shaped seal side surface being located axially opposite said second shaped seal side surface with respect to the shaped seal longitudinal axis, said stator housing end portion surface and said second shaped seal side surface extending in a radial direction with respect to the longitudinal axis, at least a portion of said second shaped seal side surface being in direct contact with said pump housing, said first shaped seal side surface facing in a direction away from said pump housing, said first shaped seal side surface comprising a first shaped seal side surface first portion and a first shaped seal side surface second portion located adjacent to said first shaped seal side surface first portion, each of said first shaped seal side surface first portion and said first shaped seal side surface second portion extending in said radial direction with respect to the longitudinal axis, said first shaped seal side surface first portion being in direct contact with said can, said first shaped seal side surface second portion being in direct contact with said stator housing end portion surface, wherein in predetermined peripheral sections, free spaces are present one of:
- between the inner periphery of the shaped seal and a radially inwardly oppositely lying wall of the can;
- and
- between the outer periphery of the shaped seal and a radially outwardly oppositely lying wall of the pump housing,
- wherein said shaped seal expands into said free spaces when said shaped seal is compressed in an axial direction with respect to the shaped seal longitudinal axis.
6 more elements
Dependencies are inferred from the claim text.