Pressure-regulating valves

Patent metadata

Field	Value
Publication number	US-10866600-B2
Application number	US-201815981416-A
Country	US
Kind code	B2
Filing date	May 16, 2018
Priority date	May 20, 2014
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A pressure-regulating valve includes a valve sleeve with first and second ends defining a longitudinal axis, a sense line, a sense piston, a main chamber, and first and second valve spools. The sleeve includes an axially aligned bore. The sense line is within the bore proximate the first end. The sense piston is within the bore between the sense line and the second end, and is configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line. The main chamber is within the bore between the sense piston and the second end, and includes supply and vent ports. The first valve spool is within the bore between the sense piston and the second end. The second valve spool is within the bore between the first valve spool and the second end.

First claim

What is claimed is:

1. A pressure-regulating valve comprising:
a valve sleeve including a first end and a second end defining a longitudinal axis therebetween, and a bore axially aligned between the first and second ends;
a sense line defined within the bore proximate the first end;
a sense piston mounted within the bore between the sense line and the second end, configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line;
a main chamber defined within the bore between the sense piston and the second end, wherein the main chamber includes an supply port and a vent port, wherein the supply port and the vent port are in fluid communication with one another by way of the main chamber;
a first valve spool mounted within the bore between the sense piston and the second end, wherein the first valve spool occludes a portion of the vent port to a variable extent to modulate a flow rate between the supply port and the vent port, and wherein the first valve spool is configured to move along the longitudinal axis to modulate a flow rate in a fluid circuit for regulation of a sense pressure, wherein the main chamber is defined between first and second land portions of the first valve spool;
a bypass line defined between the main chamber and a balance pressure chamber for fluid communication therebetween; and
a second valve spool mounted within the bore between the first valve spool and the second end configured to move along the longitudinal axis to modulate flow rate in the bypass line for regulation of a balance pressure, wherein the balance pressure chamber is defined between the first valve spool and the second valve spool, further comprising a first spring mounted between the first valve spool and a second housing portion proximate the second end of the valve sleeve, wherein the first spring is operatively connected to the first valve spool for biasing the first valve spool towards the first end of the valve sleeve.

2. A pressure-regulating valve as recited in claim 1 , wherein the valve sleeve includes a first housing portion proximate the first end and a second housing portion proximate the second end, wherein the sense piston and first valve spool are mounted in the first housing portion and the second valve spool is mounted in the second housing portion, and wherein the second housing portion is secured to the first housing portion with a mechanical fastener.

3. A pressure-regulating valve as recited in claim 1 , further comprising a second spring mounted within the bore between the second valve spool and the second end of the valve sleeve, wherein the second spring is operatively connected to the second valve spool for biasing the second valve spool towards the first end of the valve sleeve.

4. A pressure-regulating valve comprising:
a valve sleeve including a first end and a second end defining a longitudinal axis therebetween, and a bore axially aligned between the first and second ends;
a sense line defined within the bore proximate the first end;
a sense piston mounted within the bore between the sense line and the second end, configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line;
a main chamber defined within the bore between the sense piston and the second end, wherein the main chamber includes an supply port and a vent port, wherein the supply port and the vent port are in fluid communication with one another by way of the main chamber;
a first valve spool mounted within the bore between the sense piston and the second end, wherein the first valve spool occludes a portion of the vent port to a variable extent to modulate a flow rate between the supply port and the vent port, and wherein the first valve spool is configured to move along the longitudinal axis to modulate a flow rate in a fluid circuit for regulation of a sense pressure, wherein the main chamber is defined between first and second land portions of the first valve spool;
a bypass line defined between the main chamber and a balance pressure chamber for fluid communication therebetween; and
a second valve spool mounted within the bore between the first valve spool and the second end configured to move along the longitudinal axis to modulate flow rate in the bypass line for regulation of a balance pressure, wherein the balance pressure chamber is defined between the first valve spool and the second valve spool, wherein the bypass line is defined through the first valve spool.

5. A pressure-regulating valve comprising:
a valve sleeve including a first end and a second end defining a longitudinal axis therebetween, and a bore axially aligned between the first and second ends;
a sense line defined within the bore proximate the first end;
a sense piston mounted within the bore between the sense line and the second end, configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line;
a main chamber defined within the bore between the sense piston and the second end, wherein the main chamber includes an supply port and a vent port, wherein the supply port and the vent port are in fluid communication with one another by way of the main chamber;
a first valve spool mounted within the bore between the sense piston and the second end, wherein the first valve spool occludes a portion of the vent port to a variable extent to modulate a flow rate between the supply port and the vent port, and wherein the first valve spool is configured to move along the longitudinal axis to modulate a flow rate in a fluid circuit for regulation of a sense pressure, wherein the main chamber is defined between first and second land portions of the first valve spool;
a bypass line defined between the main chamber and a balance pressure chamber for fluid communication therebetween; and
a second valve spool mounted within the bore between the first valve spool and the second end configured to move along the longitudinal axis to modulate flow rate in the bypass line for regulation of a balance pressure, wherein the balance pressure chamber is defined between the first valve spool and the second valve spool, further comprising a bypass orifice within a portion of the bypass line in the second land portion proximate the balance pressure chamber, wherein the bypass orifice is configured to sustain a pressure differential between the sense line and balance pressure chamber and to meter flow through the bypass line.

6. A pressure-regulating valve comprising:
a valve sleeve including a first end and a second end defining a longitudinal axis therebetween, and a bore axially aligned between the first and second ends;
a sense line defined within the bore proximate the first end;
a sense piston mounted within the bore between the sense line and the second end, configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line;
a main chamber defined within the bore between the sense piston and the second end, wherein the main chamber includes an supply port and a vent port, wherein the supply port and the vent port are in fluid communication with one another by way of the main chamber;
a first valve spool mounted within the bore between the sense piston and the second end, wherein the first valve spool occludes a portion of the vent port to a variable extent to modulate a flow rate between the supply port and the vent port, and wherein the first valve spool is configured to move along the longitudinal axis to modulate a flow rate in a fluid circuit for regulation of a sense pressure;
a second valve spool mounted within the bore between the first valve spool and the second end configured to move along the longitudinal axis to modulate flow rate in a bypass line for regulation of a bala

Assignees

• Hamilton Sundstrand Corp

Inventors

• Franzen Mark F

Classifications

• H02K9/19 Primary

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title

• G05D16/10 Primary

  the sensing element being a piston or plunger · CPC title

• G05D16/024

  Controlling the inlet pressure, e.g. back-pressure regulator · CPC title

• Y10T137/86767

  Spool · CPC title

• G05D16/103 Primary

  the sensing element placed between the inlet and outlet (multiple-way valve G05D16/101) · CPC title