Contact Element For Rotary Piston Pump

Abstract

The rotary piston pump includes two counter-rotating rotary pistons and an oval pump housing. Every rotary piston has a rotary piston vane and is provided with a contact element. The contact points of the flanks of the two rotary pistons in which the two rotary pistons form a friction pairing are provided with a contact element each. The interior of the oval pump housing is likewise provided with an exchangeable contact element.

1 . A rotary piston pump comprising at least two counter-rotating rotary pistons and a pump housing, wherein each rotary piston comprises rotary pistons vanes and wherein each rotary piston is provided at least with one contact element, characterised in that the rotary pistons are provided at their flank that at least one contact element, with which the rotary pistons form a friction pair, wherein the pump housing is provided at its interior with at least one contact element and wherein the contact elements are disposed at the flanks of the rotary pistons in such a way that an active interrelation is ensured between the contact elements of the rotary pistons and caps of the rotary pistons. 
     
     
         2 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing are exchangeable. 
     
     
         3 . The rotary piston pump according to  claim 1 , characterised in that the contact element of the pump housing comprises at least two parts. 
     
     
         4 . The rotary piston pump according to characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing are connected by a form-fit, friction-locked and/or firmly bonded connection to the rotary piston and/or the pump housing. 
     
     
         5 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing are formed from a sealing and/or slidable material. 
     
     
         6 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and the contact element of the pump housing are made from different materials and/or material combinations. 
     
     
         7 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and the contact element of the pump housing can be used as wear protection and/or as corrosion protection. 
     
     
         8 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons are constituted rectangular or trapezoidal. 
     
     
         9 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing have a thickness from 0.5 mm to 20 mm. 
     
     
         10 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing can be produced from materials having the most diverse degrees hardness. 
     
     
         11 . The rotary piston pump according to  claim 1 , characterised in that the contact elements of the rotary pistons and/or the contact element of the pump housing can be produced from plastically deformable materials. 
     
     
         12 . The rotary piston pump according to  claim 1 , characterised in that the active interrelation between the content element of the pump housing and the end faces of the rotary pistons is ensured.