Polyetherimide pump

Patent metadata

Field	Value
Publication number	US-9429149-B2
Application number	US-201313842517-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	May 15, 2012
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A positive displacement pump and methods of making a positive displacement pump having a component, the component having a density ranging from more than 0 to 3 g/cm 3 , a glass transition temperature (Tg) greater than or equal to 150° C., and a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.

First claim

What is claimed is:

1. A positive displacement pump comprising at least a first component;
wherein said first component comprises a polyetherimide component,
wherein the polymeric component has a density ranging from more than 0 to 3 g/cm3,
wherein the polymeric component has a glass transition temperature (Tg) greater than or equal to 150° C.,
wherein the polymeric component has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.; and,
wherein the first component is a rotor of the positive displacement pump.

2. The pump according to claim 1 , wherein the polyetherimide component has an Izod unnotched (80*10*4 at +23° C. and−30° C.) impact strength of at least 40 KJ/m 2 , as measured according to ISO 180/1U.

3. The pump according to claim 1 , wherein the polyetherimide component has a Vicat softening temp, rate B/120 of 220° C., as measured according to ISO 306.

4. The pump according to claim 1 , wherein the polyetherimide component has an HDT/Ae, 1.8 MPa Edgew 120*10*4 sp=100 mm of 210° C., as measured according to ISO 75/Ae.

5. The pump according to claim 1 , wherein the pump comprises a plurality of additional components, and wherein each of the plurality of additional components comprises polyetherimide.

6. The pump according to claim 5 , wherein the pump consists of the first component and the plurality of additional components.

7. The pump according to claim 1 , wherein the polyetherimide component comprises one selected from the group consisting of a polyetherimide copolymer, a polyetherimide terpolymer, a filled polyetherimide, an unfilled polyetherimide, a polyetherimide blend, and combinations thereof.

8. The pump according to claim 7 , wherein the polyetherimide component comprises a filled polyetherimide, and wherein the polyetherimide is filled with one selected from the group consisting of carbon particles, a polyetherimide filled with metal, ceramic, glass, and combinations thereof.

9. The pump according to claim 1 , wherein the polyetherimide component further comprises one selected from the group consisting of a polyphenylsulfone (PPSU), a polyether ether ketone (PEEK), a poiyphthalamide (PPA), and combinations thereof.

10. The pump according to claim 2 , wherein the pump has a lower noise vibration harshness as compared to a second pump,
wherein the second pump comprises a metal rotor corresponding to the polymeric rotor comprising polyetherimide of the pump according to claim 2 , and
wherein the second pump is otherwise identical to the pump according to claim 2 , except for the fact that that the rotor of the second pump does not comprise polyetherimide as in the first pump, but rather comprises a metal.

11. The pump according to claim 10 , wherein the lower noise vibration harshness exhibits a reduction in decibel level.

12. The pump of claim 1 , wherein the ptmtp comprises at least one additional component, wherein said at least one additional component comprises a housing defining an inlet and an outlet of the positive displacement pump.

13. The pump according to claim 12 , wherein the housing is also made of polyetherimide.

14. The pump of claim 1 , wherein the first component is a rotor operatively positioned between an inlet and an outlet, wherein the inlet and the outlet are defined by a housing, and wherein the pinup further comprises a displacement component for displacing a liquid between the inlet and the outlet, wherein the displacing component is one selected from the group consisting of a vane, a gear, and a trachoid.

15. The pump according to claim 14 , wherein the displacement component is a roller vane.

16. The, pump according to claim 14 , wherein the displacement component also comprises polyetherimide.

17. The pump according to claim 1 , wherein the pump is a roller vane pump.

18. The pump according to claim 1 , wherein the pump is a vane pump.

19. The pump according to claim 1 , wherein the pump is a gear pump.

20. The pump according to claim 1 , wherein the pump is trachoid pump.

21. The pump according to claim 1 , wherein the pump is optimized to minimize inner stress levels in the housing, wherein the inner stress levels range from 0 to 35 MPa.

22. The pump according to claim 21 , wherein the inner stress levels in the housing are about 10 MPa.

23. The pump according to claim 21 , wherein the inner stress levels in the housing are determined by a method selected from the group consisting of measuring the inner stress levels via wire-resistance-strain gages, or predicting the inner stress levels via CAE computer simulation software, and combinations thereof.

24. A method of making a positive displacement pump for pumping liquids, the pump comprising
a housing defining an inlet and an outlet,
a rotor operatively positioned between the inlet and the outlet, the pump further comprising a rotor for displacing a liquid between the inlet and the outlet,
wherein the method comprises forming at least the rotor of the pump from polyetherimide, wherein the polyetherimide has a density ranging from more than 0 to 3g/cm3, and has glass transition temperature (Tg) greater than or equal to 150° C., and has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.

25. The method of claim 24 , wherein the rotor is machined from a solid block of polyefnerimide.

26. The method of claim 24 , wherein the rotor is injection molded from polyetherimide.

27. A positive displacement pump comprising a polyetherimide component,
wherein the polyetherimide component has a density ranging from more than 0 to 3 g/cm3,
wherein the polyetherimide component has a glass transition temperature (Tg) greater than or equal to 150° C., and
wherein the polyetherimide component has a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C;
wherein the polyetherimide component comprises a member selected from the group of polyetherimide homopolymers, polyetherimide copolymers, and combinations thereof;
wherein the polyetherimide component is a rotor operatively positioned between an inlet and an outlet, wherein the inlet and the outlet are defined by a housing, and wherein the pump further comprises a displacement component for displacing a liquid between the inlet and the outlet, wherein the displacing component is one selected from the group consisting of a vane, a gear, and a trachoid.

28. A positive displacement pump comprising at least a first component; wherein said first component comprises a polyetherimide component,
wherein the polymeric component has a density ranging from more than 0 to 3 g/cm3, a glass transition temperature (Tg) greater than or equal to 150° C., a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.; has an Izod unnotched (80*10*4 at +23° C. and−30° C.) impact strength of at least 40 KJ/m 2 , as measured according to ISO 180/1U, a Vicat softening temp, rate B/120 of 220° C., as measured according to ISO 306, an HDT/Ae, 1,8 MPa Edgew 120*10*4 sp=100 mm of 210° C., as measured according to ISO 75/Ae, and,
wherein the first component is a rotor of the positive displacement pump.

Assignees

• Sabic Global Technologies Bv

Inventors

• Haug Peter

Classifications

• F05C2225/10

  Polyimides, e.g. Aurum · CPC title

• F04C2/14

  with toothed rotary pistons · CPC title

• F01C21/10 Primary

  Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) · CPC title

• F05C2225/12

  Polyetheretherketones, e.g. PEEK · CPC title

• B29C45/0001

  characterised by the choice of material · CPC title