Ultra-high pressure generator

Abstract

An ultra-high pressure generator includes: an intensifier that discharges pressurized fluid and has a double-acting drive cylinder formed to have a first chamber and a second chamber which are delimited by a piston driven by a working medium, high pressure cylinders which discharge the pressurized fluid, and plungers which reciprocate with the piston in the high pressure cylinders; a closed-circuit working medium pump having a first and second ports as suction/discharge ports for the working medium; a drive source that drives the closed-circuit working medium pump; a first working medium channel that communicates the first chamber with the first port; and a second working medium channel that communicates the second chamber with the second port, wherein the closed-circuit working medium pump sucks/discharges the working medium from/to the first and second chambers respectively via the first and second ports to drive the intensifier.

What is claimed is: 
     
         1 . An ultra-high pressure generator comprising:
 an intensifier that discharges pressurized fluid and includes a double-acting drive cylinder formed to have a first chamber and a second chamber which are delimited by a piston driven by a working medium, a high pressure cylinder that discharges the pressurized fluid, and a plunger that reciprocates with the piston in the high pressure cylinder;   a closed-circuit working medium pump that has a first port and a second port as suction/discharge ports for the working medium, and sucks/discharges the working medium from/to the first chamber and the second chamber respectively via the first port and the second port to drive the intensifier;   a drive source that drives the closed-circuit working medium pump;   a first working medium channel that communicates the first chamber with the first port; and   a second working medium channel that communicates the second chamber with the second port.   
     
     
         2 . The ultra-high pressure generator according to  claim 1 , wherein the closed-circuit working medium pump is a fixed-displacement swash plate axial pump and the drive source is a bidirectionally rotatable drive source. 
     
     
         3 . The ultra-high pressure generator according to  claim 1 , wherein the closed-circuit working medium pump is a variable-displacement swash plate axial pump that can reverse a tilt angle between positive and negative directions. 
     
     
         4 . The ultra-high pressure generator according to  claim 1 , wherein the drive source is a servo motor, and the ultra-high pressure generator further comprises: a pressure detector that detects pressure of the pressurized fluid discharged from the intensifier; and a controller that controls the number of rotations of the servo motor in response to the pressure detected by the pressure detector. 
     
     
         5 . The ultra-high pressure generator according to  claim 2 , wherein the drive source is a servo motor, and the ultra-high pressure generator further comprises: a pressure detector that detects pressure of the pressurized fluid discharged from the intensifier; and a controller that controls the number of rotations of the servomotor in response to the pressure detected by the pressure detector. 
     
     
         6 . The ultra-high pressure generator according to  claim 3 , wherein the drive source is a servo motor, and the ultra-high pressure generator further comprises: a pressure detector that detects pressure of the pressurized fluid discharged from the intensifier; and a controller that controls the number of rotations of the servomotor in response to the pressure detected by the pressure detector. 
     
     
         7 . The ultra-high pressure generator according to  claim 1 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger. 
     
     
         8 . The ultra-high pressure generator according to  claim 2 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger. 
     
     
         9 . The ultra-high pressure generator according to  claim 3 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger. 
     
     
         10 . The ultra-high pressure generator according to  claim 4 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger. 
     
     
         11 . The ultra-high pressure generator according to  claim 5 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger. 
     
     
         12 . The ultra-high pressure generator according to  claim 6 , wherein the ultra-high pressure generator further comprises: a storage tank in which the pressurized fluid is stored; a supply port through which the pressurized fluid is supplied to the storage tank; and a heat exchanger that cools the working medium, and wherein the pressurized fluid supplied through the supply port is supplied to the storage tank via the heat exchanger.