Temperature adjusting valve, a turbine pump assembly and method of adjusting flow through a valve

Patent metadata

Field	Value
Publication number	US-2017102722-A1
Application number	US-201514879202-A
Country	US
Kind code	A1
Filing date	Oct 9, 2015
Priority date	Oct 9, 2015
Publication date	Apr 13, 2017
Grant date	—

Abstract

A temperature adjusting valve includes, a first member made of a first material having a first coefficient of thermal expansion, a second member made of a second material having a second coefficient of thermal expansion that is in operable communication with the first member, and a flow passageway at least partially defined by a distance between a first surface of the first member and a second surface of the second member, the first coefficient of thermal expansion and the second coefficient of thermal expansion are selected such that a flow area of the flow passageway changes in response to changes in temperature of at least one of the first member and the second member the distance also is adjustable independently of temperature changes of the first member and the second member.

First claim

1 . A temperature adjusting valve, comprising:
a first member made of a first material having a first coefficient of thermal expansion; a second member made of a second material having a second coefficient of thermal expansion being in operable communication with the first member; and a flow passageway at least partially defined by a distance between a first surface of the first member and a second surface of the second member, the first coefficient of thermal expansion and the second coefficient of thermal expansion being selected such that a flow area of the flow passageway changes in response to changes in temperature of at least one of the first member and the second member the distance also being adjustable independently of temperature changes of the first member and the second member.

2 . The temperature adjusting valve of claim 1 , wherein the distance between a first surface of the first member and a second surface of the second member increases in response to decreases in temperature of at least one of the first member and the second member.

3 . The temperature adjusting valve of claim 2 , wherein the increases in the distance is in response to decreases in temperature of both the first member and the second member.

4 . The temperature adjusting valve of claim 2 , wherein the distance is an axial distance.

5 . The temperature adjusting valve of claim 2 , wherein increases in the distance cause a flow area of the flow passageway to increase.

6 . The temperature adjusting valve of claim 1 , wherein a radial distance between a third surface of the first member and a fourth surface of the second member is altered by radial movement of the third surface relative to the fourth surface in response to changes in temperature of at least one of the first member and the second member.

7 . The temperature adjusting valve of claim 6 , wherein the radial distance increases in response to decreases in temperature of at least one of the first member and the second member.

8 . The temperature adjusting valve of claim 6 , wherein at least one of the third surface and the fourth surface has at least one radial recess formed therein.

9 . The temperature adjusting valve of claim 1 , wherein the first member is biased relative to the second member to increase the distance.

10 . The temperature adjusting valve of claim 1 , wherein at least one of the first coefficient of thermal expansion and the second coefficient of thermal expansion is negative.

11 . The temperature adjusting valve of claim 1 , wherein the first member is a sleeve and the second member is a stem of a gas flow valve.

12 . A method of adjusting flow through a valve, comprising:
altering temperature of at least one of a first member, made of a first material with a first coefficient of thermal expansion, and a second member, made of a second material having a second coefficient of thermal expansion, the first member and the second member defining at least a portion of a flow passageway therebetween; altering at least one dimension of at least one of the first member and the second member with the altering of temperature thereof; changing a flow area of the flow passageway with the altering of the at least one dimension; and changing the flow area of the flow passageway by moving the first member relative to the second member independent of the changes in temperature.

13 . A method of claim 12 , further comprising increasing the flow area with a decrease in temperature of at least one of the first member and the second member.

14 . A method of claim 12 , further comprising changing an axial dimension of the flow area with the altering of the temperature.

15 . A method of claim 12 , further comprising changing a radial dimension of the flow area with the altering of the temperature.

16 . A turbine pump assembly, comprising:
a turbine speed control valve comprising: a first member made of a first material having a first coefficient of thermal expansion; a second member made of a second material having a second coefficient of thermal expansion being in operable communication with the first member; and a flow passageway at least partially defined between the first member and the second member, the first coefficient of thermal expansion and the second coefficient of thermal expansion being selected such that a flow area of the flow passageway changes in response to changes in temperature of at least one of the first member and the second member.

17 . The turbine pump assembly of claim 16 , further comprising a fly weight governor assembly configured to move the second member relative to the first member proportional to rotational speed of the fly weight governor assembly.

18 . The turbine pump assembly of claim 17 , wherein the fly weight governor assembly moves the second member in a direction toward closure of the turbine speed control valve in response to increases in rotational speed of the fly weight governor assembly.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Himmelmann Richard A

Classifications

• F16K31/002

  actuated by temperature variation (thermo-electric F16K31/025) · CPC title

• F05D2300/5021

  Expansivity · CPC title

• G05D23/02 Primary

  with sensing element expanding and contracting in response to changes of temperature (G05D23/13 takes precedence) · CPC title

• F02K9/46 Primary

  using pumps · CPC title

• F04D27/004

  by varying driving speed · CPC title