US 12,331,835 B2
Method and arrangement for washer seal control
Mikko Pesonen, Savonlinna (FI); Jarkko Hytönen, Savonlinna (FI); Simo Karjalainen, Savonlinna (FI); and Harri Qvintus, Savonlinna (FI)
Assigned to ANDRITZ OY, Helsinki (FI)
Appl. No. 18/020,886
Filed by ANDRITZ OY, Helsinki (FI)
PCT Filed Aug. 6, 2021, PCT No. PCT/FI2021/050545
§ 371(c)(1), (2) Date Feb. 10, 2023,
PCT Pub. No. WO2022/034263, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 20205788 (FI), filed on Aug. 10, 2020.
Prior Publication US 2023/0304582 A1, Sep. 28, 2023
Int. Cl. F16J 15/3296 (2016.01); D21C 9/02 (2006.01); D21C 9/06 (2006.01)
CPC F16J 15/3296 (2013.01) [D21C 9/02 (2013.01); D21C 9/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An arrangement for measuring a distance between at least one seal bar and an outer surface of a rotating drum of a drum displacement washer, the arrangement comprising:
at least one sensor element inside the rotating drum and configured to provide a signal indicative of the distance between the outer surface of the rotating drum and the at least one seal bar; and
a signal transfer element configured to transfer the signal outside the rotating drum.
 
6. A drum displacement washer comprising:
a casing;
a rotating drum within the casing;
ribs on an outer surface of the rotating drum;
a wash water region within the casing and external to the rotating drum;
an array of seal bars within the casing, extending around the rotating drum, and facing and adjacent to the ribs on the outer surface of the rotating drum;
an array of adjustment elements with the casing and configure to adjust positions of the seal bars of the array of seal bars relative to the rotating drum;
a sensor element within the rotating drum and configured to generate a signal indicative of a distance between the outer surface of the rotating drum and at least one seal bar of the array of seal bars;
a signal transfer element configured to transfer the signal to outside the rotating drum to a control element, and
a control element configured to:
receive from the signal transfer element the signal indicative of the distance between the outer surface of the rotating drum and the at least one seal bar;
determine a sensed distance between the at least one seal bar and the rotating drum based on the signal; and
actuate the array of adjustment elements to adjust the positions of the seal bars relative to the rotating drum based on the sensed distance during the rotation of the rotating drum.