公开(公告)号：US20220341197A1

公开(公告)日：2022-10-27

申请号：US17642605

申请日：2020-08-20

Applicant: Putzmeister Engineering GmbH

Inventor： Carl WIESENACK ,  Frederik KORT ,  Stefan HOEFLING ,  Mirco KUHLMEY ,  Markus FRASCH

IPC: E04G21/04

Abstract: A method is provided for operating a working machine having a device for conveying thick material. A number of target values relating to the operation of the device for conveying thick material can be adjusted by a user. The method includes the following steps: detecting a number of actual values of the device; calculating a target value optimum for a respective target value of the number of adjustable target values based on the number of detected actual values; and outputting a notification for the user, in the event that an adjusted target value of the number of adjustable target values does not correspond to its calculated target value optimum.

公开(公告)号：US20230026231A1

公开(公告)日：2023-01-26

申请号：US17791660

申请日：2021-01-04

Applicant: Putzmeister Engineering GmbH

Inventor： Frederik KORT ,  Christian ZIEMENS

IPC: F04B15/02 ,  F04B1/28 ,  F04B9/117

Abstract: A method operates a thick-matter pump having a thick-matter delivery system and a hydraulic drive system. The thick-matter delivery system delivers thick matter with a variably settable delivery volumetric flow rate for driving the thick-matter delivery system. The hydraulic drive system has: a hydraulic circuit having a hydraulic fluid, a variably operable first drive pump, and a variably operable second drive pump. The first drive pump is designed for variable operation with at least one variably settable first pump parameter and the second drive pump is designed for variable operation, independent of the first pump parameter, with at least one variably settable second pump parameter for generating a variably settable overall drive volumetric flow rate of the hydraulic fluid in the hydraulic circuit. The method determines an overall-drive-volumetric-flow-rate target value for the overall drive volumetric flow rate, and determines a first parameter target value for the first pump parameter and a second parameter target value for the second pump parameter in a manner dependent on the determined overall-drive-volumetric-flow-rate target value. The first and second parameter target values differ from one another if the determined overall-drive-volumetric-flow-rate target value is in at least one overall-drive-volumetric-flow-rate-target-value range from a set of possible overall-drive-volumetric-flow-rate target values. The method delivers the thick matter with the delivery volumetric flow rate at a delivery-volumetric-flow-rate target value by generating the overall drive volumetric flow rate with the determined overall-drive-volumetric-flow-rate target value by setting the first pump parameter to the determined first parameter target value and the second pump parameter to the determined second parameter target value.

公开(公告)号：US20240159227A1

公开(公告)日：2024-05-16

申请号：US18281028

申请日：2022-03-01

Applicant: Putzmeister Engineering GmbH

Inventor： Frederik KORT

IPC: F04B15/02 ,  F04B17/03 ,  F04B19/22

CPC classification number: F04B15/02 ,  F04B17/03 ,  F04B19/22 ,  F04B2201/0202 ,  F04B2201/0206 ,  F04B2201/0209 ,  F04B2203/0209 ,  F04B2205/18

Abstract: A method for operating a construction-material and/or viscous-material pump for conveying construction material and/or viscous material has the steps of: a) determining a required value of a power or of a size of the motor system, corresponding to the power, for moving the conveying piston, b) setting, on the basis of the required value, a speed value of the motor system in such a manner that a power and/or speed reserve value between an operating point, wherein the operating point is defined by the required value of the power or of the size and the speed value, and a characteristic curve of the motor system, wherein the characteristic curve is defined by maximum values of the power or of the size and speed values, wherein maximum values are different for different speed values at least in sections, is greater than or equal to a reserve limit value.

公开(公告)号：US20210239103A1

公开(公告)日：2021-08-05

申请号：US17058276

申请日：2019-05-22

Applicant: Putzmeister Engineering GmbH

Inventor： Wolf-Michael PETZOLD ,  Jan-Martin VEIT ,  Michael SCHAEFER ,  Frederik KORT

IPC: F04B15/02 ,  F04B49/00 ,  F04B53/14 ,  F04B51/00 ,  F04B9/103

Abstract: An apparatus for conveying thick matter has a drive cylinder for receiving hydraulic fluid, a drive piston, which is arranged in the drive cylinder, a conveying cylinder for receiving thick matter, a conveying piston, which is arranged in the conveying cylinder, and a piston rod, which is fastened to the drive piston for coupling motion together with the conveying piston. The drive cylinder has a rod-side opening for applying pressure to a rod side of the drive piston by way of hydraulic fluid and a crown-side opening for applying pressure to a crown side of the drive piston facing away from the rod side by the hydraulic fluid. A drive pump is designed to generate a drive volume flow having a drive pressure of hydraulic fluid for moving the drive piston. A pump connection is designed for variable connection of the drive pump to the rod-side opening or the crown-side opening for the flow of hydraulic fluid. A sensor is designed for automatic detection of whether the pump connection is connected to the rod-side opening or the crown-side opening. A control unit controls the apparatus in a rod-side operating mode, when the rod-side pump connection is detected, and in a crown-side operating mode, when the crown-side pump connection is detected.