New technological solutions for restoring the inner surface of hydraulic cylinders

 Giải pháp công nghệ mới phục hồi bề mặt bên trong xi lanh thủy lực.

ABSTRACT

Relevance.   Agricultural  machines  widely  use  hydraulic  cylinders  for  various  auxiliary and  working  movements.  Operation  in  harsh  field  conditions  leads  to  the  failure  of  the hydraulic  cylinder  mirror  and,  as  a  result,  to  the  loss  of  force  on  the  cylinder  rod.  The development of technological solutions for the restoration of the inner surface as a more appropriate solution in repair production is relevant. 

Methods.   Studies  of  the  heat  flow  using  the  “Fluke  Ti32”  thermal  imager  and  ofthe influence of gas-dynamic spraying (GDS) modes on the adhesive and cohesive strength when using a new design of the nozzle part of the GDS equipment were carried out.

Results. The suitability of usage of  new nozzle design for GDS in order to restore the inner surface  of  the  hydraulic  cylinder  body  has  been  established.  The  elongated  and  curved nozzle  for  installations  of  the  “Dimet”  type  practically  does  not  change  the  temperature regime  of  spraying.  The  adhesive  and  cohesive  strength  of  the  coatings  obtained  with the new nozzle design is sufficient to operate under conditions characteristic of the inner surface of the hydraulic cylinder body.

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 Giải pháp công nghệ mới phục hồi bề mặt bên trong xi lanh thủy lực.

ABSTRACT

Relevance.   Agricultural  machines  widely  use  hydraulic  cylinders  for  various  auxiliary and  working  movements.  Operation  in  harsh  field  conditions  leads  to  the  failure  of  the hydraulic  cylinder  mirror  and,  as  a  result,  to  the  loss  of  force  on  the  cylinder  rod.  The development of technological solutions for the restoration of the inner surface as a more appropriate solution in repair production is relevant. 

Methods.   Studies  of  the  heat  flow  using  the  “Fluke  Ti32”  thermal  imager  and  ofthe influence of gas-dynamic spraying (GDS) modes on the adhesive and cohesive strength when using a new design of the nozzle part of the GDS equipment were carried out.

Results. The suitability of usage of  new nozzle design for GDS in order to restore the inner surface  of  the  hydraulic  cylinder  body  has  been  established.  The  elongated  and  curved nozzle  for  installations  of  the  “Dimet”  type  practically  does  not  change  the  temperature regime  of  spraying.  The  adhesive  and  cohesive  strength  of  the  coatings  obtained  with the new nozzle design is sufficient to operate under conditions characteristic of the inner surface of the hydraulic cylinder body.

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Chuyên mục: D. Luận văn kỹ thuật