Abstract A multistage hydraulic machine which includes a housing, a main shaft mounted in the housing, a high-pressure stage and low-pressure stage runner firmly secured to the main shaft wherein the housing has formed therein a plurality of runner chambers enclosing each of the runners, respectively, of the high-pressure and the low-pressure stage, a return passage communicating with the runner chambers of the high-pressure and low-pressure stages, a high-pressure stage, outer back chamber, a high-pressure stage, inner back chamber and a high-pressure stage, side chamber all of which are located within the runner chamber enclosing the high-pressure stage runner, a low-pressure stage, side pressure chamber located within the runner chamber enclosing the low-pressure stage runner, a mechanism for communicating the high-pressure stage, inner back chamber with the return passage, and a mechanism for respectively communicating the low-pressure stage, side pressure chamber with the return passage.
A multistage hydraulic machine comprising: a housing; a main shaft mounted in said housing; a high-pressure stage runner and low-pressure stage runner firmly secured to said main shaft, wherein said housing has formed therein: a plurality of runner chambers enclosing each of said runners, respectively, of said high-pressure stage and said low-pressure stage, return passage means communicating with said runner chambers of said high-pressure stage and low-pressure stage, a high-pressure stage, outer back chamber, a high-pressure stage, inner back chamber and a high-pressure stage, side chamber all of which are located within said runner chamber enclosing said high-pressure stage runner, a low-pressure stage, side pressure chamber located within said runner chamber enclosing said low-pressure stage runner; means for communicating said high-pressure stage inner back chamber with said return passage means; and means for respectively communicating said low-pressure stage side pressure chamber with said return passage means; wherein said means for communicating said high-pressure stage inner back chamber with said return passage means further comprises balancing valve means.
Claim 2
Dependent Claim
167 words
A multistage hydraulic machine comprising: a housing; a main shaft mounted in said housing; a high-pressure stage runner and low-pressure stage runner firmly secured to said main shaft, wherein said housing has formed therein: a plurality of runner chambers enclosing each of said runners, respectively, of said high-pressure stage and said low-pressure stage, return passage means communicating with said runner chambers of said high-pressure stage and low-pressure stage, a high-pressure stage, outer back chamber, a high-pressure stage, inner back chamber and a high-pressure stage, side chamber all of which are located within said runner chamber enclosing said high-pressure stage runner, a low-pressure stage, side pressure chamber located within said runner chamber enclosing said low-pressure stage runner; means for communicating said high-pressure stage inner back chamber with said return passage means; and means for respectively communicating said low-pressure stage side pressure chamber with said return passage means; wherein said means for communicating said high-pressure stage inner back chamber with said return passage means further comprises balancing valve means.
Claim 3
Dependent Claim
33 words
A multistage hydraulic machine as set forth in claim 1, wherein said means for respectively communicating said low-pressure stage, side pressure chamber with said return passage means further comprises pressure regulating valve means.