Patent ID: 11879804
Assignee: AKTIEBOLAGET SKF
Field: Measurement (Instruments)
Classification: CPC G  F | IPC F  G

Claim 15:
16. The thermal analyser of claim 10, wherein in step f performing thermal balance of the isothermal nodes is performed in accordance with an energy balance equation for each isothermal node equal to:, H
      
        f
        ⁢
        
          
        
        ⁢
        0
      
    
    +
    
      H
      
        
          1
          -
          O
        
        ,
        c
      
    
    +
    
      H
      
        
          2
          -
          0
        
        ,
        v
      
    
    +
    
      H
      
        
          3
          -
          O
        
        ,
        c
      
    
    +
    
      H
      
        
          4
          -
          O
        
        ,
        c
      
    
  
  =
  
    
      m
      0
    
    ⁢
    c
    ⁢
    
      
        ∂
        T
      
      
        ∂
        t
      
    
  

where, in addition to the indices 0, 1, 2, 3, 4 of the different nodes:
m is the mass of the lubricating grease
c is the conductive heat transfer coefficient
v is the convective heat transfer coefficient
T is the temperature at the generic calculation instant
t is the time at the generic calculation instant
Hf0 is the heat generated by friction in node 0
H (1-0, c) is the conductive heat exchange between nodes 0-1
H (2-0, v) is the convective heat exchange between the nodes 0-2
H (3-0, c) is the conductive heat exchange between the nodes 0-3
H (4-0, c) is the conductive heat exchange between nodes 0-4.