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Seal retaining sleeve for gear pump

一种保持套筒、齿轮泵的技术，应用在发动机的密封装置、泵、泵元件等方向，能够解决泄漏等问题

Active Publication Date: 2015-07-01
HAMILTON SUNDSTRAND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typically, shaft seal performance (most notably leakage) can be monitored throughout operation, excessive leakage can lead to adverse effects
Additionally, shaft seals may need to be periodically removed, inspected, possibly repaired or replaced, and then reinstalled
Depending on the arrangement of the unit, access to the shaft seal may be difficult, which is often the case in double gear stage pumps

Method used

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  • Seal retaining sleeve for gear pump
  • Seal retaining sleeve for gear pump
  • Seal retaining sleeve for gear pump

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A gear pump 20 is shown schematically, driven by an accessory gearbox 22 to deliver a fluid, such as fuel, to a gas turbine 24 . It should be understood that the application is not limited to use in connection with a particular system. Thus, while the present application has been shown and described for ease of illustration as being implemented in an aircraft fuel pump, it should be understood that it may be implemented in many other systems as well. Additionally, while a dual stage gear pump is disclosed, other machines having shafts would benefit from this.

[0027] refer to figure 2 , the gear pump 20 generally includes a housing 30 that includes an input shaft assembly 32 and a coupling shaft assembly 34 to drive a main stage 36 and a motive stage 38 ( image 3 and Figure 4 ). Rotary power is transferred from the gas turbine 24 to the accessory gearbox 22 and then to the gear pump 20 through the input shaft assembly 32 . In the disclosed non-limitin...

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PUM

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Abstract

A shaft assembly includes a shaft with a first radial shoulder and a second radial shoulder along a shaft axis. A seal retaining sleeve is defined around the shaft axis to position a shaft seal. A retainer plate at least partially between the first radial shoulder and the second radial shoulder is adjacent to the seal retaining sleeve to position and provide access to the seal retaining sleeve and shaft seal.

Description

technical field [0001] The present disclosure relates to pumps, and more particularly to fuel gear pumps for gas turbine engines. Background technique [0002] Fuel gear pumps are commonly used to provide fuel flow and pressure to gas turbine engines or other systems on aircraft. Gear pumps must operate over a wide system operating range and provide critical flow and pressure for various functions. Typically, these pumps receive rotational power from an accessory gearbox through a shaft. [0003] In fuel gear pumps, shaft seals are often used to seal the internal fuel from entering the shaft cavity. Typically, shaft seal performance (most notably leakage) can be monitored throughout operation, excessive leakage can cause adverse effects. Additionally, shaft seals may need to be periodically removed, inspected, possibly repaired or replaced, and then reinstalled. Depending on the arrangement of the unit, access to the shaft seal may be difficult, which is often the case i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C15/00
CPCF04C15/0092F01C19/005F01C21/007F04C15/0038F04C2240/603F04C2/14F04C15/0073Y10T29/49242
Inventor T. P. 沃尔格伦S. S. 沙
Owner HAMILTON SUNDSTRAND CORP