Lubricating system

Patent metadata

Field	Value
Publication number	US-12338947-B2
Application number	US-202218287095-A
Country	US
Kind code	B2
Filing date	Apr 25, 2022
Priority date	May 6, 2021
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A lubrication system includes a progressive distributor that is configured to dispense lubricant to a consumer. The lubrication system also includes a control device and at least one sensor that is configured to determine at least one lubricant pressure inside the lubrication system. The control device is configured to receive measured values from the at least one sensor and to recognize a lubrication cycle based on the measured values and also to determine an average pressure of the lubrication cycle, to perform a comparison of the average pressure and at least one normal pressure of the lubrication system, and to determine a state of the lubrication system based on a result of the comparison.

First claim

The invention claimed is:

1. A lubrication system comprising:
a progressive distributor configured to dispense lubricant to a consumer, the progressive distributor including at least one sensor, and
a control device,
wherein the at least one sensor is configured to determine at least one lubricant pressure inside the lubrication system,
wherein the control device is configured to receive measured values from the at least one sensor,
wherein the control device is configured to recognize a lubrication cycle based on the measured values and to determine an average pressure of the lubrication cycle, to perform a comparison of the average pressure and at least one normal pressure of the lubrication system, and to determine a state of the lubrication system based on a result of the comparison,
wherein the control device is configured to determine a maximum pressure, a minimum pressure, and a temperature of the lubrication system,
wherein the control device is configured to associate the average pressure with one of a plurality of temperature windows based on the temperature of the lubrication system, and
wherein the control device is configured to retrieve from a database the one of the at least one normal pressure that is associated with the one of the plurality of temperature windows.

2. The lubrication system according to claim 1 , wherein the at least one sensor is configured to measure a temperature of the lubrication system, and wherein the measured values are at least one pressure and one temperature of the lubrication system.

3. The lubrication system according to claim 1 , wherein the control device is configured to detect a lubrication cycle based on pressure fluctuations of the lubrication system.

4. The lubrication system according to claim 1 , wherein the control device is configured to store the average pressure as a normal pressure for a given temperature window when no normal pressure for the given temperature window is present in the database.

5. The lubrication system according to claim 1 , wherein the control device is configured to update the normal pressure for the given temperature window based on a current average pressure of the given temperature window when a fault-free operation of the lubrication system is recognized.

6. The lubrication system according to claim 1 , wherein the state of the lubrication system is a fault-free operation of the lubrication system, a malfunction of the lubrication system, or no function of the lubrication system.

7. The lubrication system according to claim 6 , wherein the malfunction of the lubrication system is a blockage of a lubricant line, a kink of a lubricant line, and/or a break of a lubricant line.

8. The lubrication system according to claim 1 , wherein one of the at least one sensor is disposed upstream of the progressive distributor.

9. A control device for a lubrication system,
wherein the lubrication system includes:
a progressive distributor configured to dispense lubricant to a consumer,
a pressure sensor configured to determine a lubricant pressure inside the lubrication system at a plurality of times and to produce a plurality of pressure signals each indicative of the lubricant pressure at one of the plurality of times, and
a temperature sensor configured to determine a temperature of the lubricant in the lubrication system and to produce a temperature signal indicative of the temperature of the lubricant, and

wherein the control device is configured to:
receive the plurality of pressure signals and to recognize a lubrication cycle from the plurality of pressure signals and to determine an average pressure of the lubrication cycle,
read from a database a normal pressure associated with each of a plurality of temperature windows,
compare the average pressure of the lubrication cycle to the normal pressure of a temperature window selected based on the signal indicative of the temperature of the lubricant, and
determine a state of the lubrication system based on a result of the comparing.

10. A lubrication system comprising:
a progressive distributor configured to dispense lubricant to a consumer,
a pressure sensor configured to determine a lubricant pressure inside the lubrication system at a plurality of times and to produce a plurality of pressure signals each indicative of the lubricant pressure at one of the plurality of times,
a temperature sensor configured to determine a temperature of the lubricant in the lubrication system and to produce a temperature signal indicative of the temperature of the lubricant, and
a control device according to claim 9 .

11. A method for determining a state of a lubrication system including a progressive distributor that is configured to dispense lubricant to a consumer, the method comprising:
determining a lubricant pressure inside the lubrication system at a plurality of times and producing a plurality of pressure signals each indicative of the lubricant pressure at one of the plurality of times,
determining a temperature of the lubricant in the lubrication system and producing a temperature signal indicative of the temperature of the lubricant,
recognizing a lubrication cycle from the plurality of pressure signals,
determining an average pressure of the lubrication cycle,
reading from a database containing a normal pressure associated with each of a plurality of temperature windows a normal pressure associated with the temperature indicated by the temperature signal,
comparing the average pressure of the lubrication cycle to the normal pressure associated with the temperature indicated by the temperature signal, and
determining a state of the lubrication system based on a result of the comparing.

Assignees

• Skf Lubrication Systems Germany

Inventors

• Hess Dieter
• Kreutzkaemper Juergen
• Mandera Markus
• Schoenfeld Andreas
• Schuermann Stefan
• Zahn Dennis

Classifications

• F16N2250/04

  Pressure · CPC title

• F16N29/00

  Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems · CPC title

• F16N7/385

  Central lubrication systems · CPC title

• F16N2260/02

  Indicating · CPC title

• F16N2250/08

  Temperature · CPC title