Metering distribution assembly and coating system comprising the same

Patent metadata

Field	Value
Publication number	US-12448964-B2
Application number	US-202118040993-A
Country	US
Kind code	B2
Filing date	Aug 11, 2021
Priority date	Aug 12, 2020
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

A metering distribution assembly and a coating system. The metering distribution assembly includes a volumetric cavity pump that comprises a flow passage plate having flow passages, a nozzle plate with a flow passage, a gear fixing plate attached between the flow passage plate and the nozzle plate, and a gear set located in an aperture of the fixing plate. The gear set has a fluid inlet and a fluid outlet on a side of the gear set opposite to the fluid inlet. The fluid inlet is in fluid communication with the flow passages of the flow passage plate, and the fluid outlet is in fluid communication with the flow passage of the nozzle plate. A part of the flow passages of the flow passage plate, which is in direct fluid communication with the fluid inlet, extends in a direction parallel to a rotation axis of the gear set.

First claim

The invention claimed is:

1. A metering distribution assembly composed of a volumetric cavity pump comprising:
a flow passage plate provided with flow passages for fluid flow;
a nozzle plate provided with a flow passage through the nozzle plate;
a gear fixing plate attached between the flow passage plate and the nozzle plate and having an aperture; and
a gear set located in the aperture of the gear fixing plate, the gear set having a fluid inlet and a fluid outlet on a side of the gear set opposite to the fluid inlet, the fluid inlet being in fluid communication with the flow passages of the flow passage plate, and the fluid outlet being in fluid communication with the flow passage of the nozzle plate; and
a nozzle coupled to the nozzle plate or coupled to a control valve assembly that is coupled to the nozzle plate,
wherein a part of the flow passages of the flow passage plate, which is in direct fluid communication with the fluid inlet, extends in a direction parallel to a rotation axis of the gear set,
wherein the flow passage plate has a first flow passage, a second flow passage and a third flow passage, the first flow passage receiving a fluid from outside, the second flow passage fluidly communicating the first flow passage and the third flow passage, and the third flow passage being in direct fluid communication with the fluid inlet, and
wherein a first end, of the third flow passage, is offset from the gear fixing plate and is configured to receive the fluid flow from the second flow passage and configured to direct the fluid flow to a second end of the third flow passage, wherein the second end is configured to direct the fluid flow directly to the fluid inlet of the gear set in the direction that is parallel to the rotation axis of the gear set.

2. The metering distribution assembly according to claim 1 , wherein the third flow passage is entirely defined by the flow passage plate.

3. The metering distribution assembly according to claim 2 , wherein each of the first flow passage, the second flow passage, the third flow passage, and the flow passage of the nozzle plate are straight.

4. The metering distribution assembly according to claim 1 , wherein the gear set includes a driving gear and a driven gear, the driving gear being drivable to rotate, thereby driving the driven gear to rotate, wherein the driving gear and the driven gear are non-standard gears, and wherein the driving gear and the driven gear each have an addendum height coefficient and an addendum clearance coefficient that is less than the respective addendum height coefficient.

5. The metering distribution assembly according to claim 4 , wherein each addendum height coefficient is 0.7, and each addendum clearance coefficient is 0.3.

6. The metering distribution assembly according to claim 4 , wherein the driven gear has a gear shaft.

7. The metering distribution assembly according to claim 1 , wherein the metering distribution assembly is provided with the control valve assembly, which has a needle, for controlling distribution of a fluid from the metering distribution assembly.

8. The metering distribution assembly according to claim 7 , wherein the control valve assembly is an integral component attached to the nozzle plate, the control valve assembly including a needle passage, the needle being movable in the needle passage, the needle passage being in fluid communication with the flow passage of the nozzle plate.

9. The metering distribution assembly according to claim 8 , wherein the flow passage of the nozzle plate is a straight flow passage inclined with respect to the rotation axis of the gear set.

10. The metering distribution assembly according to claim 8 , wherein the flow passage of the nozzle plate includes a first flow passage and a second flow passage, the first flow passage extending from the fluid outlet of the gear set, the second flow passage extending at an angle to the first flow passage and being in fluid communication with the needle passage.

11. The metering distribution assembly according to claim 7 , wherein the control valve assembly includes a needle housing and a top cover, the top cover being attached to the needle housing to form an internal space, in which one end of the needle is accommodated;
the flow passage of the nozzle plate includes a first flow passage, a second flow passage and a third flow passage, the first flow passage extending from the fluid outlet of the gear set, the second flow passage fluidly communicating the first flow passage and the third flow passage, the third flow passage extending to a discharge port of the nozzle plate; and
the needle housing of the control valve assembly is attached to the nozzle plate, so that the other end of the needle of the control valve assembly is movable in the third flow passage to control distribution of the fluid from the nozzle plate.

12. The metering distribution assembly according to claim 1 , wherein, on a side of the flow passage plate facing the gear set, a groove is formed in an area corresponding to the fluid outlet of the gear set.

13. The metering distribution assembly according to claim 1 , wherein a plug rod is provided, which is designed to be inserted into the flow passages of the metering distribution assembly, for eliminating a fluid dead end in the flow passages.

14. The metering distribution assembly according to claim 1 , wherein a thickness of a driving gear and a driven gear of the gear set is of the same nominal size as a thickness of the gear fixing plate.

15. A coating system comprising:
a barrel assembly comprising a barrel for accommodating a fluid; a metering distribution assembly according to claim 1 , the metering distribution assembly being attached to and in fluid communication with the barrel assembly; and
a driving assembly for driving the metering distribution assembly to distribute the fluid from the barrel assembly via the metering distribution assembly.

16. The metering distribution assembly according to claim 1 , wherein 1) the nozzle is coupled to a protrusion of the nozzle plate, or 2) wherein the nozzle is attached to an end of the control valve assembly that is attached to the nozzle plate, and the fluid outlet of the gear set and the nozzle plate are configured such that during operation fluid flows from the fluid outlet of the gear set through the nozzle plate and then is directly injected into the control valve assembly which forms a shut-off valve, and, then, the fluid flows out of the nozzle with the control of the shut-off valve.

17. The metering distribution assembly according to claim 1 , wherein the gear set includes a gear shaft, wherein one end of the gear shaft is inserted into the flow passage plate, and the other end is inserted into the nozzle plate.

18. A metering distribution assembly composed of a volumetric cavity pump comprising:
a flow passage plate provided with flow passages for fluid flow;
a nozzle plate provided with a flow passage through the nozzle plate;
a gear fixing plate attached between the flow passage plate and the nozzle plate and having an aperture; and
a gear set located in the aperture of the gear fixing plate, the gear set having a fluid inlet and a fluid outlet on a side of the gear set opposite to the fluid inlet, the fluid inlet being in fluid communication with the flow passages of the flow passage plate, and the fluid outlet being in fluid communication with the flow passage of the nozzle plate; and
a nozzle coupled to the nozzle plate or coupled to a control valve assembly that is coupled to the nozzle

Assignees

• Nordson Corp

Inventors

• Qiu Peter
• Zheng William

Classifications

• F04C15/064

  with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps · CPC title

• F04C2240/806

  Pipes for fluids; Fittings therefor · CPC title

• F04C15/0042

  Systems for the equilibration of forces acting on the machines or pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C2220/24

  for metering throughflow · CPC title