Aero-engine test bed rotation measuring device

Abstract

The utility model discloses a rotation measuring device for an aero-engine test bed, which belongs to the technical field of aero-engine test beds and comprises an oil storage supporting box, one end of the oil storage supporting box is fixedly sleeved with a front adapter, and the other end of the oil storage supporting box is fixedly sleeved with a rear adapter. A measuring circular ring is rotationally connected between the front adapter and the rear adapter and located in an inner cavity of the oil storage supporting box, and three measuring mechanisms are arranged on the measuring circular ring. According to the utility model, the lubricating oil is arranged at the bottom of the inner cavity of the oil storage supporting box, and when the first motor drives the pinion to rotate and the measuring circular ring and the plurality of measuring mechanisms are driven to rotate through the meshing transmission between the pinion and the bull gear, the meshing transmission part between the pinion and the bull gear is lubricated by using the lubricating oil; and abrasion between the small gear and the large gear is relieved, the service life of the small gear and the large gear is guaranteed, and the practicability of the device is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aero-engine test bench more specifically, relate to a kind of aero-engine test bench rotating measuring device. BACKGROUND

[0002] Aero-engine is a kind of highly complex and precision thermodynamic machinery, as the heart of aircraft, not only the power of aircraft flight, also is the important driving force for promoting the development of aviation industry, in order to improve the performance, reliability and life of aero-engine, etc., usually need to carry out test run on test bench, including parts and system test, whole machine test run etc.

[0003] After searching, the utility model with publication number CN210953407U discloses a kind of aero-engine test bench rotating measuring device, is set on the installation mechanism of test bench, for measuring the parameter of aero-engine parts, the rotating measuring mechanism includes pinion, gear, measuring ring and adapter, the two pinions are all engaged with gear, gear connects measuring ring, pinion is driven under the servo motor, gear is rotated, gear drives measuring ring to rotate;Multiple multi-measuring point total pressure probes and multiple static pressure measuring holes are uniformly distributed on the measuring ring;The adapter is set on the both sides of measuring ring, for connecting other components of test bench installation mechanism;The rotating measuring device has the advantages of accurate measurement, high efficiency, small error etc.But the above-mentioned patent still has following insufficient: when meshing transmission between gear and pinion, certain friction is generated, inconvenient for automatic lubrication;In addition, although multiple multi-measuring point total pressure probes are set, but the position of multiple multi-measuring point total pressure probes in the inner cavity of measuring ring is also relatively fixed, affect the accuracy of the measurement of air flow parameter, for this purpose, we propose a kind of aero-engine test bench rotating measuring device. UTILITY MODEL CONTENT

[0004] In view of the problems in the prior art, the utility model aims at providing a kind of aero-engine test bench rotating measuring device.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] An aero-engine test bench rotating measuring device, including oil storage support box, one end of the oil storage support box is fixedly sleeved with front adapter, the other end of the oil storage support box is fixedly sleeved with rear adapter, rotatingly connected with measuring ring between the front adapter and rear adapter and in the inner cavity of the oil storage support box, three measuring mechanisms are arranged on the measuring ring, the outer side of the measuring ring is fixedly sleeved with the large gear, the other end of the oil storage support box is fixedly installed with the first motor, the output shaft of the first motor extends to the inner cavity of the oil storage support box and is fixedly sleeved with the small gear, the small gear and the large gear are meshed with each other, and the bottom of the inner cavity of the oil storage support box is provided with lubricating oil.

[0007] As a preferred scheme of the utility model, the measuring mechanism includes the square telescopic cylinder fixedly sleeved on the outer side of the measuring ring, the inner cavity of the square telescopic cylinder is fixedly installed with the second motor at one end, the output shaft of the second motor is fixedly connected with the screw rod, the outer side of the screw rod is threadedly sleeved with the square telescopic column, the end of the square telescopic column extends to the inner cavity of the measuring ring and is fixedly installed with three five-hole probes, and the detection ends of the three five-hole probes extend to positions with different sizes from the inner wall of the measuring ring.

[0008] As a preferred scheme of the utility model, the two sides of the oil storage support box are fixedly connected with the mounting frame respectively, and screw holes are arranged on the two mounting frames respectively.

[0009] As a preferred scheme of the utility model, the side of the bottom end of the oil storage support box is fixedly installed with the on-off valve, and the end of the on-off valve extends to the bottom of the inner cavity of the oil storage support box.

[0010] As a preferred scheme of the utility model, the top of the oil storage support box is hingedly connected with the maintenance door.

[0011] As a preferred scheme of the utility model, the side of the square telescopic column and the inner wall of the square telescopic cylinder are attached.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] (1) in the utility model, the bottom of the inner cavity of the oil storage support box is provided with lubricating oil, the first motor drives the small gear to rotate, the meshing transmission between the small gear and the large gear drives the measuring ring and the plurality of measuring mechanisms to rotate, the meshing transmission between the small gear and the large gear is lubricated by the lubricating oil, the wear between the small gear and the large gear is reduced, the service life of the small gear and the large gear is guaranteed, and the utility is good.

[0014] (2) the utility model discloses, when the three measuring mechanisms of the measuring annular ring intermittent rotation are driven to the airflow of the measuring annular ring inner chamber and are detected, the second motor can drive the screw rotation, and the five-hole probe is driven to the inner chamber of the measuring annular ring and is extended through the screw thread cooperation between the screw and the square telescopic column, thereby adjusting the position of the detection end of the five-hole probe in the inner chamber of the measuring annular ring, and the airflow of the five-hole probe to the inner chamber of the measuring annular ring is detected, and the accuracy of the rotating measuring device of the aeroengine test bench is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the inside schematic diagram of the utility model oil storage support box;

[0017] Figure 3 It is the whole cross section schematic diagram of the utility model;

[0018] Figure 4 It is the cross section schematic diagram of the utility model measuring mechanism;

[0019] Figure 5 It is the cross section schematic diagram of the utility model square telescopic cylinder.

[0020] Mark explanation in drawing:

[0021] 1, oil storage support box;2, front adapter;3, rear adapter;4, measuring annular ring;5, measuring mechanism;6, large gear;7, first motor;8, small gear;9, square telescopic cylinder;10, second motor;11, screw;12, square telescopic column;13, five-hole probe;14, maintenance door;15, mounting bracket;16, screw hole;17, on-off valve. DETAILED DESCRIPTION

[0022] The technical schemes in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0023] In the description of the utility model, it needs to explain, the term "upper", "lower", "internal", "external", "top / bottom end" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate with a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "installation", "provided with", "sleeved / connected", "connection" and so on should be understood broadly, for example, "connection", can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Embodiment:

[0026] Please refer to Figures 1-5 A rotating measuring device for an aero-engine test bed, comprising an oil storage support box 1, a front adapter 2 is fixedly sleeved at one end of the oil storage support box 1, a rear adapter 3 is fixedly sleeved at the other end of the oil storage support box 1, a measuring ring 4 is rotatably connected between the front adapter 2 and the rear adapter 3 and located in the inner cavity of the oil storage support box 1, three measuring mechanisms 5 are arranged on the measuring ring 4, a large gear 6 is fixedly sleeved at the outer side of the measuring ring 4, a first motor 7 is fixedly installed at the other end of the oil storage support box 1, the output shaft of the first motor 7 extends into the inner cavity of the oil storage support box 1 and is fixedly sleeved with a small gear 8, the small gear 8 and the large gear 6 are meshed with each other, and lubricating oil is arranged at the bottom of the inner cavity of the oil storage support box 1.

[0027] In the embodiment, the lubricating oil in the inner cavity of the oil storage support box 1 immerses the bottom end of the small gear 8 and the large gear 6, so as to lubricate the meshing transmission of the small gear 8 and the large gear 6, in addition, the device is installed on the test bed, and the front part of the device is provided with an air inlet fairing and a test piece mounting mechanism, the test piece mounting mechanism is used for mounting an aero-engine, the rear part of the device is provided with an exhaust pipe, so as to form an airflow channel, the device is used for measuring the airflow pressure after passing through the test piece, and the three measuring mechanisms 5 are spaced apart by 120 degrees.

[0028] Specifically, please refer to Figures 1 to 5The measuring mechanism 5 comprises a square telescopic cylinder 9 fixedly sleeved outside the measuring ring 4, a second motor 10 fixedly installed at one end of an inner cavity of the square telescopic cylinder 9, a screw rod 11 fixedly connected with an output shaft of the second motor 10, a square telescopic column 12 threadedly sleeved outside the screw rod 11, and three five-hole probes 13 fixedly installed at an end of the square telescopic column 12 extending into the inner cavity of the measuring ring 4.

[0029] In the embodiment, the square telescopic column 12 is driven to extend into the inner cavity of the measuring ring 4 or contract into the inner cavity of the square telescopic cylinder 9 through cooperation between the screw rod 11 and the square telescopic column 12, so that the radial positions of the detection ends of the plurality of five-hole probes 13 in the inner cavity of the measuring ring 4 are adjusted, and different radial positions in the inner cavity of the measuring ring 4 are detected.

[0030] Specifically, please refer to Figure 2 The two sides of the oil storage support box 1 are fixedly connected with mounting racks 15, and screw holes 16 are arranged on the two mounting racks 15.

[0031] In the embodiment, the device is installed on a test bench or a test rack through the mounting racks 15 and the screw holes 16.

[0032] Specifically, please refer to Figure 2 A switch valve 17 is fixedly installed at a side of a bottom end of the oil storage support box 1, and an end of the switch valve 17 extends to a bottom of the inner cavity of the oil storage support box 1.

[0033] In the embodiment, the lubricating oil at the bottom of the inner cavity of the oil storage support box 1 is discharged through the switch valve 17.

[0034] Specifically, please refer to Figure 2 A maintenance door 14 is hingedly connected to a top of the oil storage support box 1.

[0035] In the embodiment, the oil storage support box 1 is maintained by opening the maintenance door 14, and the lubricating oil is conveniently filled into the bottom of the inner cavity of the oil storage support box 1.

[0036] Specifically, please refer to Figure 4 The side surface of the square telescopic column 12 is in abutment with the inner wall of the square telescopic cylinder 9.

[0037] In the embodiment, the square telescopic column 12 is limited by the inner wall of the square telescopic cylinder 9, so that the square telescopic column 12 can only move along the axial direction of the screw rod 11.

[0038] Working principle: in use, firstly, air flow enters from the air intake fairing inlet, enters the front adapter 2 after the test piece, the air flow passes through the front adapter 2, the measuring ring 4, the rear adapter 3 and the exhaust pipe, and is discharged, and meanwhile, the five-hole probe 13 at the end of the plurality of square telescopic columns 12 detects the air flow parameters at different positions in the cavity of the measuring ring 4, then the first motor 7 is started to drive the pinion 8 to rotate intermittently, the pinion 8 and the gear 6 are engaged to drive the measuring ring 4 to rotate intermittently by 20 degrees, when the measuring ring 4 and the measuring mechanism 5 on the measuring ring 4 rotate intermittently for six times, the five-hole probes 13 on the three measuring mechanisms 5 just detect the cavity of the measuring ring 4 once in a circle, then after the measuring ring 4 and the plurality of measuring mechanisms 5 rotate by 120 degrees, the three second motors 10 are started to drive the three screw rods 11 to rotate, the square telescopic columns 12 and the five-hole probes 13 are extended by a certain distance in the cavity of the measuring ring 4 through the thread cooperation between the screw rods 11 and the square telescopic columns 12, so that the detection end of the five-hole probe 13 is adjusted to detect the air flow parameters, so that the measuring ring 4 and the plurality of measuring mechanisms 5 rotate intermittently by 120 degrees again, and the position of the five-hole probe 13 in the cavity of the measuring ring 4 can be continuously adjusted, finally, the atmospheric pressure, the atmospheric temperature, the flow and other parameters are calculated, and the total pressure recovery coefficient and the distortion index and other indexes can be obtained through the existing formula.

[0039] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the technical field can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An aeroengine test cell rotational measurement apparatus, characterised in that: The utility model provides an oil storage support box, which comprises a front adapter (2) fixedly sleeved at one end of an oil storage support box (1), a rear adapter (3) fixedly sleeved at the other end of the oil storage support box (1), a measuring ring (4) rotatably connected between the front adapter (2) and the rear adapter (3) and located in the inner cavity of the oil storage support box (1), three measuring mechanisms (5) arranged on the measuring ring (4), a large gear (6) fixedly sleeved at the outer side of the measuring ring (4), a first motor (7) fixedly installed at the other end of the oil storage support box (1), an output shaft of the first motor (7) extending into the inner cavity of the oil storage support box (1) and fixedly sleeved with a small gear (8), the small gear (8) and the large gear (6) being in meshing engagement with each other, and lubricating oil arranged at the bottom of the inner cavity of the oil storage support box (1).

2. An aeroengine test cell rotational measurement apparatus according to claim 1, wherein: The measuring mechanism (5) comprises a square telescopic cylinder (9) fixedly sleeved at the outer side of the measuring ring (4), a second motor (10) fixedly installed at one end in the inner cavity of the square telescopic cylinder (9), an output shaft of the second motor (10) fixedly connected with a screw rod (11), the outer side of the screw rod (11) being threadedly sleeved with a square telescopic column (12), the end portion of the square telescopic column (12) extending into the inner cavity of the measuring ring (4) and being fixedly installed with three five-hole probes (13), and the detection ends of the three five-hole probes (13) extending to positions with different sizes from the inner wall of the measuring ring (4).

3. The rotating measurement device for an aeroengine test bed of claim 1, wherein: Two installation racks (15) are fixedly connected to the two sides of the oil storage support box (1), respectively, and screw holes (16) are arranged on the two installation racks (15), respectively.

4. The rotating measurement apparatus of claim 1, wherein: A switch valve (17) is fixedly installed at the side of the bottom end of the oil storage support box (1), and the end portion of the switch valve (17) extends to the bottom of the inner cavity of the oil storage support box (1).

5. The rotating measurement apparatus of claim 1, wherein: A maintenance door (14) is hingedly connected to the top of the oil storage support box (1).

6. A rotating measurement device for an aeroengine test bed as claimed in claim 2, characterized in that: The side surface of the square telescopic column (12) is attached to the inner wall of the square telescopic cylinder (9).

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