Large-capacity hydrodynamic-type hydraulic dynamometer with output control mechanism

Patent metadata

Field	Value
Publication number	US-11747219-B2
Application number	US-202217694667-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	May 28, 2021
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A hydrodynamic-type hydraulic dynamometer is provided. The hydrodynamic-type hydraulic dynamometer includes a shaft rotatably mounted by a plurality of bearings, a stator fixed around the shaft and having a toroidal chamber therein, a runner rotatably coupled to the shaft and causing a fluid introduced into the toroidal chamber to flow therethrough, an inner ring mounted to extend inwardly from a radially outer side of the toroidal chamber and having a control slit formed therethrough, and a shutter configured to adjust an opening degree of the control slit.

First claim

What is claimed is:

1. A hydrodynamic-type hydraulic dynamometer comprising:
a shaft rotatably mounted by a plurality of bearings;
a stator fixed around the shaft and having a toroidal chamber therein;
a runner rotatably coupled to the shaft and causing a fluid introduced into the toroidal chamber to flow therethrough;
an inner ring mounted to extend inwardly from a radially outer side of the toroidal chamber and having a control slit formed therethrough; and
a shutter configured to adjust an opening degree of the control slit.

2. The hydrodynamic-type hydraulic dynamometer according to claim 1 , wherein
the toroidal chamber comprises a pair of toroidal chambers having bilateral symmetry, and
the runner comprises a plurality of blades exposed to an inside of each of the pair of toroidal chambers to circulate the fluid introduced into the toroidal chamber.

3. The hydrodynamic-type hydraulic dynamometer according to claim 2 , further comprising a guide ring disposed between the pair of toroidal chambers and having both sides forming a portion of inner peripheral surface of each toroidal chamber.

4. The hydrodynamic-type hydraulic dynamometer according to claim 3 , wherein the stator further comprises a drain chamber formed radially outside the pair of toroidal chambers.

5. The hydrodynamic-type hydraulic dynamometer according to claim 4 , wherein the pair of toroidal chambers further comprise a pair of drain slots formed on the radially outer sides thereof to communicate with the drain chamber between the pair of toroidal chambers and the guide ring.

6. The hydrodynamic-type hydraulic dynamometer according to claim 5 , wherein the stator further includes inlet chambers formed on each axial side of the pair of toroidal chambers.

7. The hydrodynamic-type hydraulic dynamometer according to claim 6 , wherein the pair of toroidal chambers includes a pair of fluid supply nozzles formed on radially inner sides thereof to communicate from the inlet chambers to the toroidal chambers.

8. The hydrodynamic-type hydraulic dynamometer according to claim 1 , wherein the toroidal chamber has an elliptical cross-section.

9. The hydrodynamic-type hydraulic dynamometer according to claim 1 , further comprising an actuator mounted on an outer peripheral surface of the stator to move the shutter in a radial direction.

10. The hydrodynamic-type hydraulic dynamometer according to claim 9 , further comprising a displacement sensor provided on one side of the actuator to measure a displacement of the shutter.

11. The hydrodynamic-type hydraulic dynamometer according to claim 10 , further comprising a stopper provided radially inside the actuator to limit a maximum displacement of the actuator.

12. A hydrodynamic-type hydraulic dynamometer comprising:
a shaft rotatably mounted by a plurality of bearings;
a stator fixed around the shaft and having a pair of toroidal chambers therein;
a runner rotatably coupled to the shaft and having a plurality of blades to circulate a fluid introduced into the pair of toroidal chambers;
a pair of inner rings mounted to extend inwardly from radially outer sides of the pair of toroidal chambers and each having a control slit formed therethrough;
a guide ring disposed between the pair of toroidal chambers and having both sides forming a portion of inner peripheral surface of each toroidal chamber; and
a shutter configured to adjust an opening degree of the control slit.

13. The hydrodynamic-type hydraulic dynamometer according to claim 12 , further comprising:
an actuator mounted on an outer peripheral surface of the stator to move the shutter in a radial direction; and
a stopper provided radially inside the actuator to limit a maximum displacement of the actuator.

14. The hydrodynamic-type hydraulic dynamometer according to claim 13 , further comprising a displacement sensor provided on one side of the actuator to measure a displacement of the shutter.

15. The hydrodynamic-type hydraulic dynamometer according to claim 12 , wherein the stator further comprises a pair of inlet chambers formed on each axial side of the pair of toroidal chambers, and a drain chamber formed radially outside the pair of toroidal chambers.

16. The hydrodynamic-type hydraulic dynamometer according to claim 15 , wherein the pair of toroidal chambers includes a pair of fluid supply nozzles formed on radially inner sides thereof to communicate from the inlet chambers to the toroidal chambers.

17. The hydrodynamic-type hydraulic dynamometer according to claim 16 , wherein the pair of toroidal chambers further includes a pair of drain slots formed on the radially outer sides thereof to communicate with the drain chamber between the pair of toroidal chambers and the guide ring.

18. The hydrodynamic-type hydraulic dynamometer according to claim 13 , wherein the pair of inner rings each having the control slit and the shutter each includes a plurality of inner rings having a plurality of control slits and a plurality of shutters arranged circumferentially in the pair of toroidal chambers, and the plurality of shutters adjust opening degree of some of the plurality of control slits arranged in upper halves of the toroidal chambers.

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Kim Yeong Chun
• Kim Jin Uk
• Jung Dong Hwa
• Hong Gi Won
• Lee Kwang Yol

Classifications

• G01L1/02 Primary

  by hydraulic or pneumatic means · CPC title

• G01L3/20

  fluid actuated · CPC title

• G01L5/13

  for measuring the tractive or propulsive power of vehicles · CPC title

• G01M15/02 Primary

  Details or accessories of testing apparatus · CPC title