Flap actuator

• US 9,574,578 B2
• Filed: 09/19/2013
• Issued: 02/21/2017
• Est. Priority Date: 09/20/2012
• Status: Active Grant

• Current Assignee: Liebherr-Aerospace Lindenberg GmbH (Liebherr-International AG)
• Original Assignee: Liebherr-Aerospace Lindenberg GmbH (Liebherr-International AG)
• Inventors: Frick, Joern, Gaile, Anton, Weixler, Franz
• Primary Examiner(s): Bonzell, Philip J
• Application Number:
  US14/031,466
• Publication Number:
  US 20140076154A1
• Time in Patent Office: 1,251 Days
• US Class Current: 1/1
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: B64C 13/504 using electro-hydrostatic actuators [EHA's]
• CPC Class Codes: F15B 15/149 Fluid interconnections, e.g. fluid connectors, passages
• CPC Class Codes: F15B 15/202 Externally-operated valves mounted in or on the actuator
• CPC Class Codes: F15B 2215/30 Constructional details thereof
• CPC Class Codes: Y02T 50/40 Weight reduction
• CPC Class Codes: Y10T 29/49405 Valve or choke making

Abstract

The invention relates to a flap actuator, in particular to a servo/spoiler actuator, comprising at least one electrohydraulic servo valve and at least one actuator which are hydraulically connected to one another, wherein the actuator comprises at least one actuator housing in and/or at which the at least one channel is arranged by means of which one or more components, preferably likewise arranged in and/or at the actuator housing, are hydraulically connected and wherein no valve block is arranged between the actuator and the servo valve.

Claims

1. A servo/spoiler flap actuator comprising at least one electrohydraulic servo valve and at least one cylinder, the servo valve and the cylinder being hydraulically connected, wherein the cylinder comprises at least one cylinder housing, the cylinder housing including at least one channel configured to hydraulically connect one or more components selected from the group consisting of an advanced blocking valve, a maintenance operator, a thermal relief valve, a check valve and a filter, wherein no valve block is arranged between the cylinder housing and the servo valve, the cylinder comprising a mounting surface to which the servo valve is mounted, wherein the channel is integrated in the cylinder housing, wherein at least part of the cylinder housing has a layer-wise structure, and wherein components contained in a 2nd stage of the servo valve are partly or completely integrated in the cylinder housing and are hydraulically connected.

2. A flap actuator in accordance with claim 1, wherein the at least one channel extends on the cylinder housing surface.

3. A method of manufacturing an actuator housing of a flap actuator, in particular of a servo/spoiler actuator in accordance with claim 1, wherein the cylinder housing is manufactured partly or overall by a generative process.

4. A method in accordance with claim 3, wherein the generative process is selected from the group consisting of selective laser melting, direct metal laser sintering, selective laser sintering, rapid manufacturing and electron beam melting.