Pressure booster

Patent metadata

Field	Value
Publication number	US-10851806-B2
Application number	US-201716462596-A
Country	US
Kind code	B2
Filing date	Aug 17, 2017
Priority date	Nov 22, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

When a fluid is supplied to a first pressure-boosting chamber and/or a second pressure-boosting chamber of a pressure booster, either a first electromagnetic valve unit supplies a fluid discharged from a first pressurizing chamber to a second pressurizing chamber, or a second electromagnetic valve unit supplies a fluid discharged from a third pressurizing chamber to a fourth pressurizing chamber.

First claim

The invention claimed is:

1. A pressure booster, comprising:
a pressure boosting chamber;
a first drive chamber disposed on one end side of the pressure boosting chamber;
a second drive chamber disposed on another end side of the pressure boosting chamber;
a piston rod configured to penetrate through the pressure boosting chamber and extend to the first drive chamber and the second drive chamber;
a pressure boosting piston which, by being connected to the piston rod inside the pressure boosting chamber, is configured to partition the pressure boosting chamber into a first pressure boosting chamber on a side of the first drive chamber, and a second pressure boosting chamber on a side of the second drive chamber;
a first drive piston which, by being connected to one end of the piston rod inside the first drive chamber, is configured to partition the first drive chamber into a first pressurizing chamber on a side of the first pressure boosting chamber, and a second pressurizing chamber remote from the first pressure boosting chamber;
a second drive piston which, by being connected to another end of the piston rod inside the second drive chamber, is configured to partition the second drive chamber into a third pressurizing chamber on a side of the second pressure boosting chamber, and a fourth pressurizing chamber remote from the second pressure boosting chamber;
a fluid supplying mechanism configured to supply a fluid to at least one of the first pressure boosting chamber and the second pressure boosting chamber;
a first discharge return mechanism configured to supply the fluid discharged from the first pressurizing chamber to the second pressurizing chamber, or to supply the fluid discharged from the second pressurizing chamber to the first pressurizing chamber; and
a second discharge return mechanism configured to supply the fluid discharged from the third pressurizing chamber to the fourth pressurizing chamber, or to supply the fluid discharged from the fourth pressurizing chamber to the third pressurizing chamber.

2. The pressure booster according to claim 1 , wherein:
in a case that the fluid is supplied from the fluid supplying mechanism to the first pressure boosting chamber, at least, the first discharge return mechanism supplies the fluid discharged from the first pressurizing chamber to the second pressurizing chamber, or the second discharge return mechanism supplies the fluid discharged from the fourth pressurizing chamber to the third pressurizing chamber;
whereas, in a case that the fluid is supplied from the fluid supplying mechanism to the second pressure boosting chamber, at least, the second discharge return mechanism supplies the fluid discharged from the third pressurizing chamber to the fourth pressurizing chamber, or the first discharge return mechanism supplies the fluid discharged from the second pressurizing chamber to the first pressurizing chamber.

3. The pressure booster according to claim 2 , wherein:
in a case that the fluid is supplied from the fluid supplying mechanism to the first pressure boosting chamber, the first discharge return mechanism supplies the fluid discharged from the first pressurizing chamber to the second pressurizing chamber, based on a difference, on the first drive piston, between a pressure receiving area on a side of the first pressurizing chamber and a pressure receiving area on a side of the second pressurizing chamber, and the second discharge return mechanism supplies the fluid to the third pressurizing chamber together with discharging the fluid from the fourth pressurizing chamber;
whereas, in a case that the fluid is supplied from the fluid supplying mechanism to the second pressure boosting chamber, the first discharge return mechanism supplies the fluid to the first pressurizing chamber together with discharging the fluid from the second pressurizing chamber, and the second discharge return mechanism supplies the fluid discharged from the third pressurizing chamber to the fourth pressurizing chamber, based on a difference, on the second drive piston, between a pressure receiving area on a side of the third pressurizing chamber and a pressure receiving area on a side of the fourth pressurizing chamber.

4. The pressure booster according to claim 3 , wherein:
the first discharge return mechanism is configured to include a solenoid valve which is configured to supply the fluid supplied from exterior to the fluid supplying mechanism to the first pressurizing chamber together with discharging the fluid of the second pressurizing chamber to the exterior, and on the other hand, is configured to supply the fluid discharged from the first pressurizing chamber to the second pressurizing chamber; and
the second discharge return mechanism is configured to include a solenoid valve which is configured to supply the fluid supplied from the exterior to the fluid supplying mechanism to the third pressurizing chamber together with discharging the fluid of the fourth pressurizing chamber to the exterior, and on the other hand, is configured to supply the fluid discharged from the third pressurizing chamber to the fourth pressurizing chamber.

5. The pressure booster according to claim 4 , wherein:
the first discharge return mechanism is configured to include a first solenoid valve connected to the first pressurizing chamber, a second solenoid valve connected to the second pressurizing chamber, and a first discharge return flow passage connected with the first solenoid valve and the second solenoid valve;
at a first position of the first solenoid valve and the second solenoid valve, the first pressurizing chamber and the second pressurizing chamber communicate with each other through the first discharge return flow passage;
at a second position of the first solenoid valve and the second solenoid valve, the first pressurizing chamber communicates with the fluid supplying mechanism, and the second pressurizing chamber communicates with the exterior;
the second discharge return mechanism is configured to include a third solenoid valve connected to the third pressurizing chamber, a fourth solenoid valve connected to the fourth pressurizing chamber, and a second discharge return flow passage connected with the third solenoid valve and the fourth solenoid valve;
at a first position of the third solenoid valve and the fourth solenoid valve, the third pressurizing chamber and the fourth pressurizing chamber communicate with each other through the second discharge return flow passage; and
at a second position of the third solenoid valve and the fourth solenoid valve, the third pressurizing chamber communicates with the fluid supplying mechanism, and the fourth pressurizing chamber communicates with the exterior.

6. The pressure booster according to claim 2 , wherein:
in a case that the fluid is supplied from the fluid supplying mechanism to the first pressure boosting chamber, the first discharge return mechanism supplies the fluid discharged from the first pressurizing chamber to the second pressurizing chamber, together with the second discharge return mechanism supplying the fluid discharged from the fourth pressurizing chamber to the third pressurizing chamber;
whereas, in a case that the fluid is supplied from the fluid supplying mechanism to the second pressure boosting chamber, the first discharge return mechanism supplies the fluid discharged from the second pressurizing chamber to the first pressurizing chamber, together with the second discharge return mechanism supplying the fluid discharged from the third pressurizing chamber to the fourth pressurizing chamber.

7. The pressure booster according to claim 6 , wherein:
the first discharge return mechanism is configured to include a three-way valve type fifth solenoid v

Assignees

• Smc Corp

Inventors

• Asahara Hiroyuki
• Monden Kengo
• Shinjo Naoki
• Nagura Seiichi
• SOMEYA Kazutaka

Classifications

• F15B2211/7055

  having more than two chambers · CPC title

• F15B3/00 Primary

  Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids {(fluid-driven pumps F04B9/08)} · CPC title

• F15B9/16

  Systems essentially having two or more interacting servomotors {, e.g. multi-stage (F15B18/00, F15B20/00 take precedence)} · CPC title

• F15B15/2807

  Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches · CPC title

• F15B2211/3058

  having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode · CPC title