Delivery device having a connecting rod, and a method for controlling a delivery device having a connecting rod and at least one balance weight

Patent metadata

Field	Value
Publication number	US-10605240-B2
Application number	US-201113704528-A
Country	US
Kind code	B2
Filing date	May 18, 2011
Priority date	Jun 14, 2010
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A delivery device having a connecting rod, and a method for controlling a delivery device having a connecting rod and at least one balance weight, includes a part that is permanently connected to a shaft, on which part a pivot bearing is situated, by which the first end region of the connecting rod is accommodated by the part, in particular such that the connecting rod is able to be driven in eccentric manner, balance weights being situated on the part so as to be displaceable by a first drive, a first computer being provided on the part, which controls the displacement of the balance weights.

First claim

The invention claimed is:

1. A device, comprising:
a rocker;
a mount disposed on a first end of the rocker;
a connecting rod having a first end connected to a second end of the rocker;
a first pivot bearing for supporting the rocker on a bearing block;
a second pivot bearing connected to a second end of the connecting rod;
a weight plate connected to the second pivot bearing;
at least one balance weight, the weight plate including a track corresponding to each balance weight, wherein each balance weight is displaceable along the corresponding track in the weight plate; and
a gear unit having a driven shaft connected to the weight plate.

2. The device according to claim 1 , wherein the device is arranged as a pump adapted to pump crude oil.

3. A method for controlling a device having a connecting rod and at least one weight plate connected to the connecting rod via a pivot bearing, the weight plate including at least one track for displaceably accommodating at least one balance weight, comprising:
driving the connecting rod by a driven shaft that is connected to the weight plate and an electric drive, wherein the electric drive includes a gear unit driven by an electric motor;
recording an effective power of the electric drive based on a rectifier supplying the electric motor; and
shifting the at least one balance weight along the at least one track as a function of the recorded effective power with at least one drive mounted on the weight plate.

4. The method according to claim 3 , further comprising:
determining a local minimum from a characteristic of the effective power;
supplying an effective power value associated with the determined local minimum to a first controller as a first actual value;
controlling the first actual value toward a first setpoint value in that a displacement of the at least one balance weight along the at least one track is used as an actuating variable of the first controller in order to achieve a motor operation of the electric drive;
wherein the first setpoint value is zero or has a positive value that is smaller than one fifth of a nominal power or a permanently maximally allowed output of the electric drive.

Assignees

• Becker Guenter
• Degen Dirk
• Sew Eurodrive Gmbh & Co

Inventors

• BECKER GüNTER
• Degen Dirk

Classifications

• F16F15/28

  Counterweights, {i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft (rotating balancer shafts F16F15/264; correcting-weights for balancing rotating bodies F16F15/32)}; Attaching or mounting same · CPC title

• F04B47/14

  Counterbalancing · CPC title

• F04B47/022 Primary

  driving of the walking beam · CPC title

• E21B47/009

  Monitoring of walking-beam pump systems · CPC title

• E21B43/127

  Adaptations of walking-beam pump systems · CPC title