CN110987418A

CN110987418A - Open-loop force system indexing loading gearbox state detection test bed

Info

Publication number: CN110987418A
Application number: CN202010007567.7A
Authority: CN
Inventors: 袁伟; 张立国; 张磊安; 郭前建; 黄雪梅; 于良峰
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2020-01-04
Filing date: 2020-01-04
Publication date: 2020-04-10
Anticipated expiration: 2040-01-04
Also published as: CN110987418B

Abstract

The invention discloses a test bed for detecting the state of an open-loop force system indexing loading gearbox, which mainly comprises an indexing loading coupler, a gearbox to be detected (a gear to be detected is one third of the tooth width of a corresponding gear in a paired gearbox), the paired gearbox, a peristaltic pump oil-liquid circulating system, a belt drive, an elastic intermediate shaft, a rigid shaft and an auxiliary fixing device. A force system open-loop system loading mode is adopted, the loading gradient of the indexing coupling is refined, and the gear box to be tested is quantitatively loaded by utilizing the linear relation between the deformation of the elastic intermediate shaft and the torque, so that the health state detection research of the gear box under different load conditions is realized, (closed circulation oil supply is adopted, real-time oil sample collection is facilitated, and the health evaluation after treatment is realized). The method is used for evaluating the wear types and degrees of the gear to be tested such as wear, pitting corrosion and gluing by detecting the oil in the test process at different loading stages, so that the tribological performance of the gear in the working process is obtained.

Description

Open-loop force system indexing loading gearbox state detection test bed

Technical Field

The invention belongs to the technical field of gear box test beds, and particularly relates to a method for loading a gear to be tested in a step-by-step indexing loading mode of a mechanical system of a force system open-loop system, circulating oil through a peristaltic pump, acquiring health state data of a gear box by a real-time oil sampling detection technology, and researching the influence relationship of different loads on the healthy operation of the gear.

Background

Gear drive is the use of engaged gear pair transmission motion and power, in modern industrial equipment, the gear is accurate because of having the transmission, high efficiency, high transmission capacity, advantages such as long service life, by wide application in modern industrial equipment and traffic field, on the other hand, in the meshing transmission process, the overload inefficacy phenomenon of multiple form easily appears in the gear, such as wearing and tearing, veneer, pitting, fracture etc., unreasonable load level, cause the working life of gear to shorten, especially the important occasion of difficult maintenance, the health status of gear directly influences the safety in production of industry and the work continuity of large-scale unit, so need through the mode of experiment, grasp the operational capability and the healthy evolution process of gear under the different loads. Because the mechanism and the rule of a failure mode are quite complex, the running health state of the gear under the thinned discrete load must be detected, so that the open-loop force system indexing loading gearbox state detection table is particularly important, and has important value for the research of the health evolution process of the gear under different loads.

At present, gear detection test beds have various forms, and the common gear test bed types include German FZG test bed and American NASA test bed, and the gear detection test bed is mainly characterized in that the structure is simple, the installation is convenient, but the loading variable quantity in the experimental process is overlarge, so that the experimental data is rough, and the working state of the gear under different loads cannot be accurately reflected, so that the loading variable quantity is refined by changing the structure of a loading coupler according to the indexing principle and utilizing the linear relation characteristic of the torque and the deformation of an elastic intermediate shaft, and the gear to be detected is loaded through a mechanical system of a force system open loop system.

Disclosure of Invention

According to the invention, through improving the stability of a mechanical system and based on a load division step-by-step loading mode of an open-loop system, each input quantity has a system output quantity in a fixed relation with the input quantity, and disturbance factors such as internal parameters or external loads are not large, so that more accurate and refined discrete loads can be obtained, the bearing capacity of the gear to be tested can be accurately tested, and the accurate matching relation between the wear pattern and the loads can be conveniently established. On the basis of the defect that the experimental data are not ideal due to the fact that the loading amplitude of the prior art is too large, the indexing principle that the loading torque can be refined is provided, and then the test bed is used for carrying out a gear abrasion real-time detection experiment under the action of an oil-liquid circulating system, so that the safety of the experimental process can be guaranteed, more accurate experimental data can be provided, and accurate detection of gear abrasion is achieved.

The invention discloses a test bed for detecting the state of an open-loop force system indexing loading gearbox, which is characterized in that: the mechanical system comprises a loading device, a connecting and fixing device, a test device, a driving device and a peristaltic pump oil-liquid circulating system; the loading device comprises: two indexing loading couplings [15] and [16] with different structures, a bolt [17] and a nut [18 ]; the connection fixing device includes: a rigid shaft [7], an elastic intermediate shaft [4], a drum-shaped tooth type coupling [11] and a fixed platform [8 ]; the test device comprises: an experimental primary gearbox [2] is matched with a primary gearbox [12 ]; the driving device includes: the motor [3], the flat belt [5] and the belt wheel [6], the peristaltic pump oil-liquid circulating system: a peristaltic pump [13] and a rubber hose [1 ].

The working principle of the mechanism is as follows: during loading, the loading spanner is clamped in the grooves of the two semi-indexing couplings to realize fine indexing loading, when one indexing scale is superposed, two pairs of hinged holes on the two semi-loading couplings are superposed, the hinged hole bolts [17] are inserted into the two pairs of aligned holes, the nuts [18] are screwed, the loading spanner is removed, and loading is realized.

The innovation points of the invention are as follows: the invention relates to a test bed for detecting the state of an open-loop force system indexing loading gear box, which is based on a force system open-loop system, two gear boxes are in primary bevel gear transmission, in the experimental process, the internal gear of the experimental gear box always bears the torque caused by the deformation of an elastic intermediate shaft, the test bed is suitable for long-term operation, torque adjustment refinement is applied to a differential coupling, the angle indexing principle is adopted, the surface of the outer ring of the coupling is provided with indication scales, 2 degrees between long scales correspond to large-amplitude torque adjustment, 1 degree between short scales corresponds to small-amplitude torque adjustment, the torque can be gradually loaded according to the angle principle in the experiment, the oil sample in the gear box to be detected is sampled and detected in real time by combining a flexible oil circulating system of a peristaltic pump, the friction and wear degree between gears in real time.

Drawings

Fig. 1 is a schematic diagram of the general structure of the present invention.

Fig. 2 is a schematic diagram of a force-based open loop system.

Fig. 3 is a schematic view of a first indexing loading coupling half construction.

Fig. 4 is a schematic view of a second indexing loaded coupling half.

Figure 5 is a schematic view of the two half load coupling.

Fig. 6 is a schematic diagram of the matching of the indexing holes of the two halves of the indexing loading coupling.

In the figure: 1. a rubber tube; 2. a gear box to be tested; 3. an electric motor; 4. an elastic intermediate shaft; 5. flattening the belt; 6. a pulley; 7. a rigid shaft; 8. a fixation aid; 9. indexing and loading the coupler; 10. a cylindrical coupling; 11. a drum-type tooth-shaped coupling; 12. a mating gear box; 13. a peristaltic pump; 14. a test bed rack; 15. a first indexing loading coupling; 16. a second indexing loading coupler; 17. a bolt; 18. and a nut.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

Referring to fig. 1, the general three-dimensional structure of the invention is schematically shown: a driving motor [3] is connected with a rigid shaft [7] through a flat belt [5] and a belt wheel [6] transmission system, one end of the rigid shaft is connected with an indexing differential loading coupler [15] and is connected with a gear box [2] to be tested; the other end is connected with a drum-shaped tooth type coupling [11] and a matching gear box [12 ]; the other two shafts of the two gear boxes are connected with the elastic intermediate shaft [4] through a flat key and a cylindrical coupler [10] to form a reliable and stable force system-based open-loop loading mechanical system; the peristaltic pump (13) and the rubber hose (1) are connected and reasonably placed in a gear box to be tested, closed circulation oil supply is achieved, real-time oil sample collection is facilitated, and the device is used for post-processing health assessment. See fig. 2 for a schematic diagram of a force-based open loop system.

See figure 5 for a structural schematic diagram of an indexing loading coupler [9 ]. 18 reamed holes are uniformly distributed in the inner ring of the first indexing loading half coupling [15], and 36 reamed holes are uniformly distributed in the outer ring; 20 reamed holes are uniformly distributed in the inner ring of the second indexing loading half coupling [16], 40 reamed holes are uniformly distributed in the outer ring, 12 grooves are uniformly distributed in the edge surface of the coupling, the joint of the two indexing loading half couplings is marked with corresponding scales of the indexing holes, the large scale corresponds to the torque with larger adjustment amplitude, and the small scale refines the variable quantity of the adjustment torque, and the specific structure refers to fig. 3 and 4.

FIG. 5 is a schematic diagram of the coupling operation of the two half-loading couplings: during loading, the bearing is clamped in the groove of the movable half-indexing coupler through a loading wrench. Wherein 2 degrees between the long scales correspond to large-amplitude torque adjustment, 1 degree between the short scales correspond to small-amplitude torque adjustment, two pairs of hinged holes on two half-loading couplings are overlapped each time one division scale is overlapped, specifically, referring to fig. 6, according to the linear relation between the torsion angle and the torque, short-interval discrete loading is realized, a hinged hole bolt [17] is inserted into the two aligned pairs of holes, a nut [18] is screwed, a loading wrench is removed, and loading is finished.

Claims

1. The invention discloses a test bed for detecting the state of an open-loop force system indexing loading gearbox, which is characterized in that: the mechanical system comprises a loading device, a connecting and driving device, a test device, a driving device and a peristaltic pump oil-liquid circulating system; the loading device comprises: two indexing loading couplings [15] and [16], a bolt [17] and a nut [18] with different structures, wherein the connecting and transmission device comprises: a rigid shaft [7], an elastic intermediate shaft [4], a drum-shaped tooth type coupling [11], a fixed platform [8], a flat belt [5] and a belt wheel [6 ]; the test device comprises: the gear box to be tested [2] and the matched gear box [12 ]; the driving device includes: an electric motor [3 ]; the peristaltic pump oil-liquid circulating system comprises: a peristaltic pump [13] and a rubber hose [1 ].

2. The open loop force system indexing loading gearbox state detection test bed of claim 1, characterized in that: the driving motor [3] is connected with the rigid shaft [7] through the belt transmission [5] and [6], one end is connected with the indexing differential loading coupler [15], and then is connected with the gear box [2] to be tested; the other end is connected with a matching gear box (12); the shafts of the two gear boxes are connected with the elastic intermediate shaft [4] through a flat key and a cylindrical coupler [10] to form a reliable and stable mechanical transmission system, the peristaltic pump [13] and the rubber hose [1] are connected and reasonably placed in the gear box to be tested, closed circulation oil supply can be realized, real-time oil sample collection is facilitated, and the device is used for post-processing health assessment.

3. The open loop force system indexing loading gearbox state detection test bed of claim 1, characterized in that: the indexing differential loading coupler consists of a first indexing loading half-coupler [15] and a second indexing loading half-coupler [16], wherein 18 hinged holes are uniformly distributed in the inner ring of the first indexing loading half-coupler, and 36 hinged holes are uniformly distributed in the outer ring of the first indexing loading half-coupler; 20 reamed holes are uniformly distributed in the inner ring of the second indexing loading half coupling, 40 reamed holes are uniformly distributed in the outer ring of the second indexing loading half coupling, 12 grooves are uniformly distributed in the edge surface of the coupling, the joint of the two indexing loading half couplings is carved with a scale corresponding to the indexing hole, the large scale is used for correspondingly adjusting large torque, and the small scale is used for correspondingly adjusting the variable quantity of small-amplitude torque.

4. The open loop force system indexing loading gearbox state detection test bed of claim 1, characterized in that: during loading, the loading wrench is clamped in the grooves of the two semi-indexing couplings to realize indexing loading, when one indexing scale is superposed, two pairs of hinged holes on the two semi-loading couplings are superposed, the hinged hole bolts are inserted into the two pairs of aligned holes, the nuts are screwed, the loading wrench is removed, and loading is realized.

5. The open loop force system indexing loading gearbox state detection test bed of claim 1, characterized in that: in the experimental process, the accurate detection of gear friction and wear states in different time periods through real-time oil sampling detection can be realized through the reasonable combination of the peristaltic pump oil circulating system and the test bed open-loop system, oil change operation can also be performed through the peristaltic pump [13], and the experimental error caused by human factors is reduced.