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US 12,546,313 B2Granted
External gear pump
OwnerFarhad Sedri, Alireza Riasiinventors
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an external gear pump. The external gear pump includes a casing, a first bearing, a second bearing, a driver gear, a first hollow cylinder, a driven gear, a second hollow cylinder, an inlet port, and an outlet port. When a first longitudinal slot of the first hollow cylinder is aligned with a slot from the first plurality of slots of the driver gear, fluid communication is provided between a first inter-teeth space between two consecutive teeth from the first plurality of teeth of the driver gear and the inlet port through a first longitudinal hole of the first hollow cylinder, the first longitudinal slot, and the slot from the first plurality of slots.
Claims9
An external gear pump, comprising:
- a casing with an inlet and an outlet;
- a driver gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driver axis in a first rotational direction;
- a driven gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driven axis in a second rotational direction opposite to the first rotational direction, and meshing with the driver gear in a mesh zone;
- a first bearing carrier disposed in the casing at a first side of the casing;
- a second bearing carrier disposed in the casing at a second side of the casing, opposite to the first side of the casing, the first bearing carrier further comprising a third hole and a fourth hole;
- porting passageways disposed within the first bearing carrier;
- a front cover attached to the second side of the casing;
- a rear cover attached to the first side of the casing, the rear cover comprising porting passageways;
- wherein the driver gear further comprises:
- a first face and a second face;
- a first hole extending inward from the second face;
- a first live shaft extending outward from the second face;
- a first plurality of teeth and a first plurality of root surfaces arranged alternately around the driver gear;
- a first plurality of slots provided on the first plurality of root surfaces, each slot configured to provide fluid communication between the first hole and a respective first inter-teeth space between two consecutive teeth from the first plurality of teeth;
- wherein the driven gear further comprises:
- a third face and a fourth face;
- a second hole extending inward from the third face;
- a second live shaft extending outward from the fourth face;
- a second plurality of teeth and a second plurality of root surfaces arranged alternately around the driven gear;
- a second plurality of slots provided on the second plurality of root surfaces, each slot configured to provide fluid communication between the second hole and a respective second inter-teeth space between two consecutive teeth from the second plurality of teeth;
- a first dead shaft disposed inside the first hole of the driver gear and the third hole of the first bearing carrier, fixedly attached to the first bearing carrier, the first dead shaft comprising:
- a first longitudinal hole;
- a first lateral slot on a first lateral face of the first dead shaft, configured to provide fluid communication between the first longitudinal hole and the first lateral slot;
- a third longitudinal hole;
- a third lateral slot on the first lateral face of the first dead shaft, configured to provide fluid communication between the third longitudinal hole and the third lateral slot;
- a second dead shaft disposed inside the second hole of the driven gear and the fourth hole of the first bearing carrier, fixedly attached to the first bearing carrier, the second dead shaft comprising:
- a second longitudinal hole;
- a second lateral slot on a second lateral face of the second dead shaft, configured to provide fluid communication between the second longitudinal hole and the second lateral slot;
- a fourth longitudinal hole;
- a fourth lateral slot on the second lateral face of the second dead shaft, configured to provide fluid communication between the fourth longitudinal hole and the fourth lateral slot;
- an inlet port at a third side of the casing, in fluid communication with an inlet zone disposed within the third side of the casing, the driver gear and the driven gear configured to suck fluid from the inlet port at the inlet zone;
- an outlet port at a fourth side of the casing, in fluid communication with an outlet zone disposed within the fourth side of the casing, the driver gear and the driven gear configured to expel the fluid to the outlet port at the outlet zone;
- wherein:
- the first lateral slot faces the inlet zone;
- the second lateral slot faces the inlet zone;
- the third lateral slot faces the outlet zone;
- the fourth lateral slot faces the outlet zone;
- the first longitudinal hole and the first lateral slot are in fluid communication with the inlet zone;
- the second longitudinal hole and the second lateral slot are in fluid communication with the inlet zone;
- the third longitudinal hole and the third lateral slot are in fluid communication with the outlet zone;
- the fourth longitudinal hole and the fourth lateral slot are in fluid communication with the outlet zone;
- wherein:
- when the first lateral slot is aligned with the adjacent slots from the first plurality of slots, fluid communication is provided between the first inter-teeth space and the inlet zone through the first longitudinal hole, the first lateral slot, and the adjacent slots from the first plurality of slots;
- when the second lateral slot is aligned with the adjacent slots from the second plurality of slots, fluid communication is provided between the second inter-teeth space and the inlet zone through the second longitudinal hole, the second lateral slot, and the adjacent slots from the second plurality of slots;
- when the third lateral slot is aligned with the adjacent slots from the first plurality of slots, fluid communication is provided between the first inter-teeth space and the outlet zone through the third longitudinal hole, the third lateral slot, and the adjacent slots from the first plurality of slots;
- when the fourth lateral slot is aligned with the adjacent slots from the second plurality of slots, fluid communication is provided between the second inter-teeth space and the outlet zone through the fourth longitudinal hole, the fourth lateral slot, and the adjacent slots from the second plurality of slots.
43 more elements
An external gear pump, comprising:
- a casing with an inlet and an outlet;
- a driver gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driver axis in a first rotational direction;
- a driven gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driven axis in a second rotational direction opposite to the first rotational direction, and meshing with the driver gear in a mesh zone;
- a first bearing carrier disposed in the casing at a first side of the casing;
- a second bearing carrier disposed in the casing at a second side of the casing, opposite to the first side of the casing, the first bearing carrier further comprising a third hole and a fourth hole;
- porting passageways disposed within the first bearing carrier;
- a rear cover attached to the first side of the casing;
- a front cover attached to the second side of the casing;
- porting passageways disposed within the rear cover;
- wherein the driver gear further comprises:
- a first face and a second face;
- a first hole extending inward from the first face;
- a first live shaft extending outward from the second face;
- a first plurality of teeth and a first plurality of root surfaces arranged alternately around the driver gear;
- a first plurality of slots provided on the first plurality of root surfaces, each slot configured to provide fluid communication between the first hole and a respective first inter-teeth space between two consecutive teeth from the first plurality of teeth;
- wherein the driven gear further comprises:
- a third face and a fourth face;
- a second hole extending inward from the third face;
- a second live shaft extending outward from the fourth face;
- a second plurality of teeth and a second plurality of root surfaces arranged alternately around the driven gear;
- a second plurality of slots provided on the second plurality of root surfaces, each slot configured to provide fluid communication between the second hole and a respective second inter-teeth space between two consecutive teeth from the second plurality of teeth;
- a first dead shaft disposed inside the first hole of the driver gear and the third hole of the first bearing carrier, fixedly attached to the first bearing carrier, the first dead shaft comprising:
- a first longitudinal hole;
- and
- a first lateral slot on a first lateral face of the first dead shaft, configured to provide fluid communication between the first longitudinal hole and the first lateral slot;
- a second dead shaft disposed inside the second hole of the driven gear and the fourth hole of the first bearing carrier, fixedly attached to the first bearing carrier, the second dead shaft comprising:
- a second longitudinal hole;
- and
- a second lateral slot on a second lateral face of the second dead shaft, configured to provide fluid communication between the second longitudinal hole and the second lateral slot;
- an inlet port at a third side of the casing, in fluid communication with an inlet zone disposed within the third side of the casing, the driver gear and the driven gear configured to draw fluid from the inlet port at the inlet zone;
- and
- an outlet port at a fourth side of the casing, in fluid communication with an outlet zone disposed within the fourth side of the casing, the driver gear and the driven gear configured to expel fluid to the outlet port at the outlet zone;
- wherein:
- the first lateral slot faces the inlet zone;
- the second lateral slot faces the inlet zone;
- the first longitudinal hole and the first lateral slot are in fluid communication with the inlet zone;
- the second longitudinal hole and the second lateral slot are in fluid communication with the inlet zone;
- when the first lateral slot aligns with the adjacent slots from the first plurality of slots, fluid communication is provided between the first inter-teeth space and the inlet zone through the first longitudinal hole, the first lateral slot, and the adjacent slots from the first plurality of slots;
- and
- when the second lateral slot aligns with the adjacent slots from the second plurality of slots, fluid communication is provided between the second inter-teeth space and the inlet zone through the second longitudinal hole, the second lateral slot, and the adjacent slots from the second plurality of slots.
37 more elements
An external gear pump, comprising:
- a casing with an inlet and an outlet;
- a driver gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driver axis in a first rotational direction;
- a driven gear supported for rotation within the casing, disposed between the outlet and the inlet, and configured to rotate around a driven axis in a second rotational direction opposite to the first rotational direction, and meshing with the driver gear in a mesh zone;
- a first bearing carrier disposed in the casing at a first side of the casing;
- a second bearing carrier disposed in the casing at a second side of the casing, opposite to the first side of the casing, the first bearing carrier further comprising a third hole and a fourth hole;
- porting passageways disposed within the first bearing carrier;
- a rear cover attached to the first side of the casing;
- a front cover attached to the second side of the casing;
- porting passageways disposed within the rear cover;
- wherein the driver gear further comprises:
- a first face and a second face;
- a first hole extending inward from the first face;
- a first live shaft extending outward from the second face;
- a first plurality of teeth and a first plurality of root surfaces arranged alternately around the driver gear;
- a first plurality of slots provided on the first plurality of root surfaces, each slot configured to provide fluid communication between the first hole and a respective first inter-teeth space between two consecutive teeth from the first plurality of teeth;
- wherein the driven gear further comprises:
- a third face and a fourth face;
- a second hole extending inward from the third face;
- a second live shaft extending outward from the fourth face;
- a second plurality of teeth and a second plurality of root surfaces arranged alternately around the driven gear;
- a second plurality of slots provided on the second plurality of root surfaces, each slot configured to provide fluid communication between the second hole and a respective second inter-teeth space between two consecutive teeth from the second plurality of teeth;
- a first dead shaft disposed inside the first hole of the driver gear and the third hole of the first bearing carrier, fixedly attached to the first bearing carrier, the first dead shaft comprising:
- a first longitudinal hole;
- and
- a first lateral slot on a first lateral face of the first dead shaft, configured to provide fluid communication between the first longitudinal hole and the first lateral slot;
- a second dead shaft disposed inside the second hole of the driven gear and the fourth hole of the first bearing carrier, fixedly attached to the first bearing carrier, the second dead shaft comprising:
- a second longitudinal hole;
- and
- a second lateral slot on a second lateral face of the second dead shaft, configured to provide fluid communication between the second longitudinal hole and the second lateral slot;
- an inlet port at a third side of the casing, in fluid communication with an inlet zone disposed within the third side of the casing, the driver gear and the driven gear configured to draw fluid from the inlet port at the inlet zone;
- an outlet port at a fourth side of the casing, in fluid communication with an outlet zone disposed within the fourth side of the casing, the driver gear and the driven gear configured to expel fluid to the outlet port at the outlet zone;
- wherein:
- the first lateral slot faces the outlet zone;
- the second lateral slot faces the outlet zone;
- the first longitudinal hole and the first lateral slot are in fluid communication with the outlet zone;
- the second longitudinal hole and the second lateral slot are in fluid communication with the outlet zone;
- when the first lateral slot aligns with the adjacent slots from the first plurality of slots, fluid communication is provided between the first inter-teeth space and the outlet zone through the first longitudinal hole, the first lateral slot, and the adjacent slots from the first plurality of slots;
- when the second lateral slot aligns with the adjacent slots from the second plurality of slots, fluid communication is provided between the second inter-teeth space and the outlet zone through the second longitudinal hole, the second lateral slot, and the adjacent slots from the second plurality of slots.
35 more elements
Dependencies are inferred from the claim text.