Rotatable turbo-fan engine fan tip sensor with square magnet-applied measurement unit

Abstract

A turbofan engine fan tip sensor according to one embodiment comprises a housing, a base frame disposed inside the housing, a holder having an outer surface with a shape corresponding to the inner surface of the base frame and at least a portion of which is inserted into the inner side of the base frame, and a magnet received in the holder, wherein the holder can be rotated about the central axis of the base frame while separated from the base frame and then re-inserted into the inner side of the base frame.

Description

Technology Field

[0001] The present invention relates to a turbofan engine fan tip sensor capable of rotation of a measuring part to which a square magnet is applied. Background Technology

[0002] A fan tip sensor is used to measure the revolutions per minute of a fan in a gas turbine engine (e.g., a turbofan engine). Fan tip sensors generally operate using a magnetic pickup method. When a fan passes near the magnetic field generated by the magnet inside the fan tip sensor, the direction of the magnetic field changes, inducing a current in the coil wound around the sensor magnet and generating a voltage in the coil.

[0003] A fan tip sensor according to the prior art generally includes a circular magnet. Since the shape of the fan tip and the shape of the magnet are different, when the fan tip passes the sensor measurement part, the voltage generated in the coil is low, and more than two peak voltages occur instead of one when the fan tip is measured once, which makes it difficult to accurately process and analyze the signal. means of solving the problem

[0004] A turbofan engine fan tip sensor according to one embodiment comprises a housing, a base frame disposed inside the housing, a holder having an outer surface with a shape corresponding to the inner surface of the base frame and at least a portion of which is inserted into the inner side of the base frame, and a magnet received in the holder, wherein the holder can be rotated about the central axis of the base frame while separated from the base frame and then re-inserted into the inner side of the base frame.

[0005] In one embodiment, the base frame may include a frame body, a first frame groove formed by being recessed in the frame body, a second frame groove formed by being recessed in the frame body, and a third frame groove formed by being recessed in the frame body.

[0006] In one embodiment, the holder may include a holder body, a first holder projection protruding from the holder body, and a second holder projection protruding from the holder body.

[0007] In one embodiment, when the holder is inserted into the inner side of the base frame, the first holder projection and the second holder projection are received in the first frame groove and the second frame groove, respectively, and when the holder is separated from the base frame, rotated, and then inserted back into the inner side of the base frame, the first holder projection and the second holder projection can be received in the second frame groove and the third frame groove, respectively.

[0008] In one embodiment, the turbofan engine fan tip sensor may further include a support that supports the holder while the holder is inserted into the inner side of the base frame, and an elastic body that presses the holder toward the support.

[0009] In one embodiment, the elastic body may be compressed while the holder is separated from the base frame.

[0010] In one embodiment, the turbofan engine fan tip sensor may further include a pair of stoppers extending in a vertical direction from the support.

[0011] In one embodiment, the holder may further include a pair of catch projections that are formed protruding from the holder body and are respectively provided to be caught on the pair of stoppers.

[0012] In one embodiment, the pair of locking protrusions may be formed on opposite sides with respect to the central axis of the base frame.

[0013] In one embodiment, the magnet may be characterized as being a square magnet. Brief explanation of the drawing

[0014] FIG. 1 is a side view illustrating a turbofan engine and a fan tip sensor according to one embodiment. FIG. 2 is a plan view illustrating a turbofan engine and a fan tip sensor according to one embodiment. FIG. 3 is a front view illustrating the interior of a fan tip sensor according to one embodiment. FIG. 4 is a bottom view illustrating a base frame and a holder according to one embodiment. FIG. 5 is a front view illustrating a state in which a holder according to one embodiment is separated from a base frame. FIG. 6 is a bottom view illustrating a base frame and a holder according to one embodiment. FIG. 7 is a front view illustrating the interior of a fan tip sensor according to one embodiment. FIG. 8 is a front view illustrating a state in which a holder according to one embodiment is separated from a base frame. FIG. 9 is a bottom view illustrating a state in which a catch projection according to one embodiment is not caught on a stopper. FIG. 10 is a bottom view illustrating a state in which a locking projection according to one embodiment is engaged with a stopper. Specific details for implementing the invention

[0015] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, actual implementations are not limited to the specific embodiments disclosed, and the scope of this specification includes modifications, equivalents, or substitutions included in the technical concept described by the embodiments.

[0016] Terms such as first or second may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may also be named the first component.

[0017] When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between.

[0018] The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0019] Components included in any one embodiment and components having common functions shall be described using the same names in other embodiments. Unless otherwise stated, the descriptions given in any one embodiment may also apply to other embodiments, and specific descriptions shall be omitted to the extent of overlap.

[0020] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0021] Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical components are given the same reference numeral regardless of the drawing number, and redundant descriptions thereof will be omitted.

[0022] FIG. 1 is a side view illustrating a turbofan engine and a fan tip sensor according to one embodiment, and FIG. 2 is a top view illustrating a turbofan engine and a fan tip sensor according to one embodiment.

[0023] Referring to FIGS. 1 and 2, a turbofan engine fan tip sensor (1, hereinafter referred to as "fan tip sensor") according to one embodiment is mounted on a turbofan engine (9) and can measure the rotational speed per minute of a fan (92). The fan (92) may be provided in multiple numbers, for example, around a rotation axis (91).

[0024] In one embodiment, the magnet (16) included in the measuring part of the fan tip sensor (1) may be a square magnet. The length of the magnet (16) measured in the first direction may be different from the length of the magnet (16) measured in the second direction intersecting the first direction.

[0025] In one embodiment, the measuring portion of the fan tip sensor (1) may be configured to be rotatable. By rotating the measuring portion, the magnet (16) may be positioned parallel to the fan tip as shown in FIG. 2. Even if the fan tip sensor (1) is mounted on any turbofan engine (9), the measuring portion may be rotated to correspond to the angle of the fan (92). By positioning the magnet (16) parallel to the fan tip, the voltage generated in the coil surrounding the magnet (16) (e.g., the coil (17) in FIG. 4) increases, and the effect of electromagnetic induction is enhanced, thereby improving the detection performance of the fan tip. The fan tip sensor (1) can increase the accuracy of signal processing and analysis.

[0026] FIG. 3 is a front view illustrating the interior of a fan tip sensor according to one embodiment, FIG. 4 is a bottom view illustrating a base frame and a holder according to one embodiment, FIG. 5 is a front view illustrating a state in which a holder is separated from a base frame according to one embodiment, and FIG. 6 is a bottom view illustrating a base frame and a holder according to one embodiment.

[0027] Referring to FIGS. 3 to 6, the measuring part of the fan tip sensor (1) according to one embodiment can change the angle of the magnet (16) with respect to the fan tip by rotating with respect to the housing (11). In one embodiment, the fan tip sensor (1) may include a housing (11), a base frame (12), a holder (13), a support (14), and an elastic body (15).

[0028] In one embodiment, the housing (11) may be detachably connected to a turbofan engine (e.g., the turbofan engine (9) of FIG. 1). A base frame (12) and a holder (13) may be disposed inside the housing (11).

[0029] The base frame (12) can be fixed to the housing (11). The base frame (12) may have a ring shape with a center perforated.

[0030] The holder (13) can accommodate a magnet (16) and a coil (17) that surrounds the magnet (16). The holder (13) can be understood as a component of the measuring unit. At least a portion of the holder (13) can be inserted into the inner side of the base frame (12). The outer surface of the holder (13) may have a shape corresponding to the inner surface of the base frame (12). Here, the corresponding shape refers to a shape configured to interlock with one of the shapes, such as an uneven structure.

[0031] In one embodiment, the holder (13) can be rotated about the central axis of the base frame (12) (e.g., an axis parallel to the z-axis) while separated from the base frame (12), and then re-inserted into the base frame (12).

[0032] The support (14) can support the holder (13) while the holder (13) is inserted into the inner side of the base frame (12). For example, the support (14) can support the edge of the holder (13). The holder (13) can be supported by the support (14) and prevent it from moving out of the housing (11).

[0033] The elastic body (15) can press the holder (13) toward the support (14). The holder (13) can be separated from the base frame (12) only when an external force of a certain magnitude or greater is applied to the holder (13). While the holder (13) is being separated from the base frame (12), the elastic body (15) can be compressed. When no external force of a certain magnitude or greater is applied to the holder (13), it can remain inserted into the base frame (12).

[0034] Hereinafter, the process of rotating the holder (13) relative to the base frame (12) is described based on the case where a plurality of holes are formed on the inner surface of the base frame (12) and a plurality of protrusions are formed on the outer surface of the holder (13).

[0035] In one embodiment, the base frame (12) may include a frame body (121) having a ring shape with a center perforated, and a first frame groove (122), a second frame groove (123), and a third frame groove (124) formed by being recessed in the frame body (121). The first frame groove (122), the second frame groove (123), and the third frame groove (124) may have the same shape as each other.

[0036] In one embodiment, the holder (13) may include a holder body (131) that accommodates a magnet (16), and a first holder projection (132) and a second holder projection (133) that protrude radially from the holder body (131). The first holder projection (132) and the second holder projection (133) may have the same shape as each other.

[0037] Referring to FIGS. 3 and 4, a holder (13) according to one embodiment is inserted into a base frame (12). At this time, a first holder projection (132) and a second holder projection (133) can be received in a first frame groove (122) and a second frame groove (123), respectively. From this structure, the rotation of the holder body (131) about the central axis of the base frame (12) can be limited.

[0038] In the above state, if the holder body (131) is pressed upward (e.g., in the +z direction) against the base frame (12), the holder (13) can be separated from the base frame (12) as shown in FIG. 5. At this time, the first holder projection (132) and the second holder projection (133) are separated from the first frame groove (122) and the second frame groove (123), respectively, and the holder body (131) can rotate about the central axis of the base frame (12).

[0039] After the holder body (131) rotates about the central axis of the base frame (12), the holder (13) can be re-inserted into the base frame (12) as shown in FIG. 6. At this time, the first holder projection (132) and the second holder projection (133) can be received in the second frame groove (123) and the third frame groove (124), respectively.

[0040] Meanwhile, it should be noted that the holder (13) can rotate by any angle with respect to the central axis of the base frame (12) after being separated from the base frame (12). For example, after the holder (13) is rotated from the base frame (12), the first holder projection (132) may be received in the third frame groove (124) rather than the second frame groove (123).

[0041] So far, the holder (13) has been described as rotating clockwise relative to the base frame (12) with reference to FIG. 4. However, it should be noted that the holder (13) may also rotate counterclockwise relative to the base frame (12).

[0042] In the drawings of this specification, the first holder projection (132) and the second holder projection (133) are each depicted as having a round shape, but it should be noted that the shapes of the first holder projection (132) and the second holder projection (133) are not limited thereto. For example, the first holder projection (132) and the second holder projection (133) may each have a wedge shape with a pointed end. In this case, the first frame groove (122), the second frame groove (123), and the third frame groove (124) may also be understood to have a shape corresponding to the wedge shape.

[0043] FIG. 7 is a front view illustrating the interior of a fan tip sensor according to one embodiment, FIG. 8 is a front view illustrating a state in which a holder according to one embodiment is separated from a base frame, FIG. 9 is a bottom view illustrating a state in which a locking projection according to one embodiment is not engaged with a stopper, and FIG. 10 is a bottom view illustrating a state in which a locking projection according to one embodiment is engaged with a stopper. It should be noted in advance that the magnet is omitted in FIG. 9 and FIG. 10.

[0044] Referring to FIGS. 7 through 10, when the holder (23) is separated from the base frame (22), the rotation range of the holder (23) relative to the base frame (22) can be limited by a stopper (28). With this structure, damage to a wire (not shown) caused by excessive rotation of the holder (23) relative to the base frame (22) can be reduced.

[0045] In one embodiment, the stopper (28) may be formed to extend in a direction perpendicular to the support (24) (e.g., +z direction). The stopper (28) may be formed integrally with the support (24), for example. In one embodiment, the stopper (28) may be provided as a pair. The stopper (28) may be inserted into a slot (235) formed by being recessed inside the holder (23). The slot (235) may extend circularly with respect to the center of the holder body (231).

[0046] In one embodiment, the holder (23) may further include a pair of locking protrusions (234). Each of the pair of locking protrusions (234) may be formed to protrude from the holder body (231) and may be provided to be able to be locked into a pair of stoppers (28). In one embodiment, the pair of locking protrusions (234) may be formed on opposite sides with respect to the central axis of the base frame (22).

[0047] Referring to FIGS. 8 and 9, when the holder (23) is separated from the base frame (22), the stopper (28) can remain inserted into the slot (235) of the holder (23).

[0048] In the above state, when the holder (23) continues to rotate in one direction (e.g., clockwise with respect to FIG. 9) with respect to the central axis of the base frame (22), as shown in FIG. 10, a pair of holder (23) protrusions may each come into contact with a pair of stoppers (28). As the holder (23) protrusions are supported by the stoppers (28), the holder (23) may no longer rotate in one direction.

[0049] Although the embodiments have been described above with reference to the limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, suitable results may be achieved even if the described techniques are performed in a different order than described, and / or if the components of the described system, structure, device, circuit, etc. are combined or assembled in a form different from described, or replaced or substituted by other components or equivalents.

[0050] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below.

Claims

Claim 1 A turbofan engine fan tip sensor comprising: a housing; a base frame disposed inside the housing; a holder having an outer surface having a shape corresponding to the inner surface of the base frame, at least a portion of which is inserted into the inner side of the base frame; and a magnet received in the holder, wherein the holder can be rotated about the central axis of the base frame while separated from the base frame and then re-inserted into the inner side of the base frame. Claim 2 A turbofan engine fan tip sensor according to claim 1, wherein the base frame comprises: a frame body; a first frame groove formed by being recessed in the frame body; a second frame groove formed by being recessed in the frame body; and a third frame groove formed by being recessed in the frame body. Claim 3 In claim 2, the holder comprises: a holder body; a first holder projection protruding from the holder body; and a second holder projection protruding from the holder body, a turbofan engine fan tip sensor. Claim 4 A turbofan engine fan tip sensor according to claim 3, wherein, when the holder is inserted into the inner side of the base frame, the first holder projection and the second holder projection are respectively received in the first frame groove and the second frame groove, and when the holder is separated from the base frame, rotated, and then reinserted into the inner side of the base frame, the first holder projection and the second holder projection are respectively received in the second frame groove and the third frame groove. Claim 5 A turbofan engine fan tip sensor according to claim 3, further comprising: a support that supports the holder while the holder is inserted into the inner side of the base frame; and an elastic body that presses the holder toward the support. Claim 6 A turbofan engine fan tip sensor according to claim 5, wherein the elastic body is compressed while the holder is separated from the base frame. Claim 7 A turbofan engine fan tip sensor according to claim 5, further comprising a pair of stoppers extending in a vertical direction from the support. Claim 8 A turbofan engine fan tip sensor according to claim 7, wherein the holder further comprises a pair of engaging protrusions formed to protrude from the holder body and arranged to engage with each of the pair of stoppers. Claim 9 In claim 8, the above-mentioned pair of locking protrusions are formed on opposite sides with respect to the central axis of the base frame, forming a turbofan engine fan tip sensor. Claim 10 A turbofan engine fan tip sensor according to claim 1, characterized in that the magnet is a square magnet.

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