CN210526878U

CN210526878U - Analog loading accessory device

Info

Publication number: CN210526878U
Application number: CN201921068784.6U
Authority: CN
Inventors: 张明胜; 阳开华; 程功; 常亮; 王志亮; 李印
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-05-15
Anticipated expiration: 2029-07-09

Abstract

The utility model belongs to the field of mechanical structure design, and relates to a simulated loading accessory device, wherein an external spline shaft is arranged inside an internal spline shaft and can axially float in the internal spline shaft in a small amplitude; the bearing inner ring and the inner spacer sleeve are arranged on the inner spline shaft in an interference manner; the bearing outer ring and the outer spacing sleeve are arranged in an interference manner with the shell; the external spline shaft is an input end, and the output flange is an output end; because the spline clearance fit is adopted between the external spline shaft and the internal spline shaft and between the output flange and the internal spline shaft, the design of axial movement is realized, the product is effectively inhibited, the vibration transmission between the simulation loading accessory and the coupler is realized, the test interference is reduced, when the spline connected with the product is seriously worn and needs to be replaced, only the hole elastic retainer ring is required to be disassembled by using an instrument, the external spline shaft is pulled out, the whole simulation accessory loading device is not required to be disassembled, the maintenance workload is effectively reduced on the premise of meeting the use requirement, and the maintenance cost is reduced.

Description

Analog loading accessory device

Technical Field

The utility model belongs to the technical field of mechanical design, concretely relates to simulation loading annex device.

Background

An aircraft and engine accessory transmission casing (called an accessory casing for short) is an important component of an aircraft engine, and has the main function of extracting and transmitting mechanical energy generated by the operation of the engine to various accessories (a lubricating oil pump, a fuel pump, a hydraulic pump, a generator and the like) arranged on the accessory casing through a series of gears according to a specified transmission ratio, and converting the mechanical energy into hydraulic energy, electric energy and the like by each accessory to maintain the normal operation of each part of the aircraft and the engine. In order to evaluate the assembly quality of the accessory case before leaving the factory, the stability of long-time operation and determine the service life and the repair period, the accessory case needs to be tested in a ground tester. The present tester of the accessory casing adopts a simulation accessory loading structure, mainly comprises a simulation loading accessory, a coupler, a load gear box, a hydraulic pump, a servo valve and a hydraulic oil station, and has the principle that mechanical energy transmitted to the accessory by the accessory casing is converted into hydraulic energy through the hydraulic pump, hydraulic load is controlled through the servo valve, and finally the mechanical energy is converted into heat energy which is consumed by cooling water.

The installation mode of the simulation loading accessory on the accessory casing is consistent with the real working state, the quick release ring connection and the spline transmission are used, the structure of the conventional simulation loading accessory device is shown in figure 1, and the problems existing in the use process are as follows:

1. maintenance is loaded down with trivial details, with high costs: in order to protect the internal spline of the accessory case, the hardness of the internal spline matched with the analog loading accessory is low, and the analog loading accessory needs to be replaced after being used for about 200 hours. In the current device, each time the spline shaft is replaced, the analog loading accessory needs to be completely disassembled and reassembled, and a pair of bearings arranged on the spline shaft can report the waste. Therefore, the difficulty of equipment maintenance is increased, and the cost is greatly increased.

2. The vibration is large: because the accessory case has vibration requirements during testing, the vibration of the analog loading accessory must be controlled intensively, and the vibration conditions of the accessory case and the analog loading accessory can be monitored in real time during testing (the requirement is that the fundamental frequency vibration peak value is not more than 2 g). The existing simulation loading accessory can transmit the vibration of the coupler to the vibration sensor due to structural reasons to cause that the vibration exceeds the standard, and the coupler does not need to control the vibration, so that in order to achieve the purpose of reducing the vibration, a tester needs to frequently carry out on-site dynamic balance on the coupler, the working efficiency is greatly reduced, and certain influence is also exerted on the product quality.

Disclosure of Invention

The utility model aims at: a simulation loading accessory device is designed to solve the technical problems of complex maintenance, high cost and large vibration in the existing design.

For solving the technical problem, the technical proposal of the utility model is that: an analog loading accessory device, comprising: the analog loading accessory device comprises a shell 1, a bearing 3, an outer spacer sleeve 4, an inner spacer sleeve 5, an output flange 8, an output seal 10, an inner spline shaft 11, an outer spline shaft 13, an input seal 16 and an anti-rotation pin 19;

the external spline shaft 13 is arranged inside the internal spline shaft 11 and can axially float in the internal spline shaft 11 in a small range, and the first retainer ring 12 and the third retainer ring 18 are axially used for limiting;

the inner ring of the bearing 3 and the inner spacer sleeve 5 are arranged on the inner spline shaft 11 in an interference fit manner; the outer ring of the bearing 3 and the outer spacer sleeve 4 are arranged in an interference fit with the shell 1;

the outer ring of the bearing 3 is limited by an output seal 10; the tail end of the internal spline shaft 11 and the output flange 8 are in spline transmission and axially positioned;

the external spline shaft 13 is an input end, and the output flange 8 is an output end; two ends of the internal spline shaft 11 are sealed by using an input seal 16 and an output seal 10;

the shell 1 is provided with a ventilation cap 2; an anti-rotation pin 19 is installed at the matching position of the input seal 16 and the shell 1.

The bearing 3 is an angular contact ball bearing;

the output seal 10 is fixed with the shell 1 through a bolt 6 and a spring pad 7;

the input seal 16 is fixed to the housing 1 using a second retainer 17;

the output flange 8 is axially positioned by a fixing nut 9;

the first retainer ring 12 is a steel wire retainer ring; the second retainer 17 is an elastic retainer ring for holes; the third retainer 18 is a circlip for a hole;

the output flange 8 can axially float 5mm on the internal spline shaft 11 along the spline.

Preferably, a certain clearance is reserved when the output seal 10 is assembled with the outer ring of the bearing 3, and the clearance is used for the axial expansion of the bearing when the bearing is heated.

Preferably, the mounting edge of the housing 1 is provided with an inclination angle; the quick-release ring convenient to use is connected with the accessory case, a seam allowance is arranged at the position matched with a product, and the sharp edge is chamfered to prevent the seam allowance from being scratched.

The utility model has the advantages that: compare old structure, the utility model discloses a simulation annex loading device all has great promotion in the three aspect of improvement maintenance convenience, reduction maintenance cost and vibration control, has improved experimental stability, and the device has used on a plurality of testers at present, job stabilization, functional.

The concrete expression is as follows: at present, the integral key shaft is changed in about 200 hours to the tester, and every is on average carried out on-the-spot dynamic balance 0.5h, uses the utility model discloses a simulation annex loading device can effectively reduce maintenance time 1 h/time (former change integral key shaft once need about 1 hour, only needs 2-3 minutes now), effectively practice thrift two mouthfuls of bearings of cost/time, because the utility model discloses a simulation annex loading device only needs the time of spending about 10 minutes more in the equipment, but middle dynamic balance that need not to do, so and then save experimental adjustment time 0.3 h/platform.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the examples of the present invention will be briefly explained below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a conventional analog accessory loading device;

fig. 2 is a schematic structural view of the analog accessory loading device of the present invention;

FIG. 3 is a schematic diagram of the present invention illustrating the use of the simulated attachment loading device;

the device comprises a shell 1, a vent cap 2, a bearing 3, an outer spacer sleeve 4, an inner spacer sleeve 5, a bolt 6, a spring cushion 7, an output flange 8, a fixing nut 9, an output seal 10, an inner spline shaft 11, a first retainer ring 12, an outer spline shaft 13, a locking nut 14, a locking washer 15, an input seal 16, a second retainer ring 17, a third retainer ring 18, an anti-rotation pin 19, a spline shaft 21, a front end seal 22, a shell 23, a deep groove ball bearing 24, a nut 25, a rear end seal 26, a flange 27 and a flat key 28.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

Features of various aspects of embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples thereof. The present invention is not limited to any particular arrangement and method provided below, but covers any modification, replacement, etc. of all product structures, methods covered without departing from the spirit of the invention.

In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention.

The utility model discloses a see figure 2 in simulation loading annex device structure, the spline end is the input, and the flange end is the output, and the component part of constituteing includes: the device comprises a shell 1, a vent cap 2, a bearing 3, an outer spacer sleeve 4, an inner spacer sleeve 5, a bolt 6, a spring pad 7, an output flange 8, a fixing nut 9, an output seal 10, an inner spline shaft 11, a first retainer ring 12 which is a steel wire retainer ring, an outer spline shaft 13, a locking nut 14, a locking washer 15, an input seal 16, a second retainer ring 17 which adopts a hole circlip A type D055, a third retainer ring 18 which adopts a hole circlip A type D031 and an anti-rotation pin 19;

the mounting edge of the shell 1 is provided with an inclination angle, so that the practical quick-release ring is conveniently connected with the accessory case, a seam allowance is arranged at the position matched with a product, and the sharp edge is chamfered to prevent the seam allowance from being scratched.

The external spline shaft 13 is inserted into the internal spline shaft 11, the axial direction is limited by a steel wire retainer ring 12 and a hole retainer ring 18 respectively, and the external spline shaft 13 can axially move in the internal spline shaft 11 in a small range; the bearing 3 adopts angular contact ball bearing, and bearing inner ring and interior spacer 5 interference fit are on internal spline shaft 11, use lock nut 14 and locking washer 15 lock to die, and 3 outer rings of bearing, outer spacer 4 and 1 interference fit of casing, and output seal 10 is spacing to 3 outer rings of bearing, and the assembly is reserved certain clearance and is used for the bearing axial expansion that is heated.

The tail end of the internal spline shaft 11 and the output flange 8 are in spline transmission, a fixing nut 9 is used for axial positioning, and the output flange 8 can axially float for 5mm on the internal spline shaft 11 along a spline.

The utility model discloses a simulation loading annex device uses the lubricating oil lubrication, and the lubricating oil gets into from the top oil inlet, by the bottom outflow, and the bearing nozzle is on

outer spacer

4, and 11 both ends of internal spline shaft use input seal 16 and output seal 10 to seal oil, and both all are spiral seal, and wherein input seal 16 uses the circlip 17 to fix on casing 1, and output seal 10 uses bolt 6 and spring pad 7 to fix on the casing. After assembly, holes are drilled at the matching part of the input seal 16 and the shell 1, and an anti-rotation pin 19 is installed.

As shown in fig. 3 the utility model discloses a simulation annex loading attachment installs on annex machine casket interface through quick-release ring, transmits the mechanical energy of annex machine casket output to simulation loading attachment through external spline shaft 13, uses flange joint between shaft coupling and loading attachment, the load gear box, and hinge matter hole bolt location is fastened, finally transmits the mechanical energy to the hydraulic pump of installing on the load gear box, turns into the hydraulic pressure ability and carries out the loading.

The utility model discloses a simulation loading annex device is owing to adopted the structure of inside and outside two integral key shafts, when the spline (the 13 little splines of external key shaft) that are connected with the product wearing and tearing need seriously change, only need pull down 18 instruments for the circlip for the hole, extract external key shaft 13 can, need not to decompose whole simulation annex loading device, under the prerequisite that satisfies the operation requirement, reduce maintenance work load effectively, reduced the maintenance cost.

Because spline clearance fit is adopted between the external spline shaft 13 and the internal spline shaft 11 and between the output flange 8 and the internal spline shaft 11, the design of axial movement is realized, the vibration transmission among products, simulated loading accessories and a coupler is effectively inhibited, the test interference is reduced, the vibration of the simulated loading accessories can be effectively controlled only by carrying out dynamic balance when the external spline shaft 13 and the internal spline shaft 11 are added, and the test quality is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. An analog loading accessory device, comprising: the simulated loading accessory device comprises a shell (1), a bearing (3), an outer spacer sleeve (4), an inner spacer sleeve (5), an output flange (8), an output seal (10), an inner spline shaft (11), an outer spline shaft (13), an input seal (16) and an anti-rotation pin (19);

the external spline shaft (13) is arranged inside the internal spline shaft (11) and can axially float in the internal spline shaft (11) in a small range, and a first retaining ring (12) and a third retaining ring (18) are axially used for limiting;

the inner ring of the bearing (3) and the inner spacer sleeve (5) are arranged on the inner spline shaft (11) in an interference manner; the outer ring of the bearing (3) and the outer spacer sleeve (4) are arranged with the shell (1) in an interference manner;

the outer ring of the bearing (3) is limited by the output seal (10); the tail end of the internal spline shaft (11) and the output flange (8) are in spline transmission and are axially positioned;

the external spline shaft (13) is an input end, and the output flange (8) is an output end;

the two ends of the internal spline shaft (11) are sealed by the input seal (16) and the output seal (10);

the housing (1) has a vent cap (2); the anti-rotation pin (19) is installed at the matching position of the input seal (16) and the shell (1).

2. The analog loading accessory device of claim 1, wherein: the bearing (3) is an angular contact ball bearing.

3. The analog loading accessory device of claim 2, wherein: the output seal (10) is fixed with the shell (1) through a bolt (6) and a spring pad (7).

4. The analog loading accessory device of claim 2, wherein: the input seal (16) is fixed on the shell (1) by a second retainer ring (17).

5. The analog loading accessory device of claim 2, wherein: the output flange (8) is axially positioned by using a fixing nut (9).

6. The analog loading accessory device of claim 4, wherein: the first retainer ring (12) is a steel wire retainer ring; the second retainer ring (17) is an elastic retainer ring for a hole; the third retainer ring (18) is a circlip for a hole.

7. The analog loading accessory device of claim 2, wherein: the output flange (8) can axially float for 5mm along the spline on the internal spline shaft (11).

8. The analog loading accessory device of claim 2, wherein: and a certain gap is reserved when the output seal (10) is assembled with the outer ring of the bearing (3).

9. The analog loading accessory device of claim 2, wherein: the mounting edge of the shell (1) is provided with an inclined angle.