Fluid flow regulation assembly with vibration attenuation

A fluid flow regulation assembly comprising:

• movable parts for being actively mechanically driven, wherein the movable parts include at least one fluid flow regulating body for regulating a fluid flow and a rotor of a motor for driving the regulating body;
• power electronics for controlling the motor, wherein at least one of the movable parts and the power electronics are a source of vibration;
• and
• static parts exposed to traveling vibrations originating from the source of vibration, wherein:
• the static parts include at least one of the group comprising:
• a pump housing, a valve housing, a motor housing, a pump base and an electronics housing;
• the static parts comprise a structural element with at least one vibration attenuation section for attenuating vibrations that originate from the source of vibration, travel along said structural element, and have a vibration frequency above a pre-determined minimum vibration frequency;
• the at least one vibration attenuation section has a material thickness decay profile in a traveling direction of the vibrations;
• the structural element comprises at least one wall section;
• the at least one vibration attenuation section is arranged at the at least one wall section;
• the at least one vibration attenuation section extends over an area of any shape;
• the area defines a distance (D) between two points of the area that have a largest distance to each other in the traveling direction of the vibrations;
• said distance (D) fulfils the formula
• D
• ≥
• 0.5
• c
• red
• f
• min
• ;
• and
• fmin in is the minimum vibration frequency and c_red is the speed of sound along the f min structural element where a material thickness in the at least one vibration attenuation section is minimal.

A fluid flow regulation assembly comprising:

• movable parts for being actively mechanically driven, wherein the movable parts include at least one fluid flow regulating body for regulating a fluid flow and a rotor of a motor for driving the regulating body;
• power electronics for controlling the motor, wherein at least one of the movable parts and the power electronics are a source of vibration;
• and
• static parts exposed to traveling vibrations originating from the source of vibration, wherein:
• the static parts include at least one of the group comprising:
• a pump housing, a valve housing, a motor housing, a pump base and an electronics housing;
• the static parts comprise a structural element with at least one vibration attenuation section for attenuating vibrations that originate from the source of vibration, travel along said structural element, and have a vibration frequency above a pre-determined minimum vibration frequency;
• the at least one vibration attenuation section has a material thickness decay profile in a traveling direction of the vibrations;
• the structural element comprises at least one wall section;
• the at least one vibration attenuation section is arranged at the at least one wall section;
• the at least one vibration attenuation section extends over an area of any shape;
• the area defines a first distance along a first straight virtual line between two points of the area that have the largest distance to each other;
• the area defines a second distance along a second straight virtual line intersecting a center of the first virtual line at a right angle;
• the second distance is a distance between two points of the area on the second virtual line that have the largest distance to each other;
• and
• the first distance is at least 10% larger than the second distance.