CN115343451A - Aviation lubricating oil deposition performance test device - Google Patents

Abstract

The invention relates to the technical field of lubricating oil testing, and particularly discloses an aviation lubricating oil deposition performance testing device which comprises a box body, a main shaft, a supporting bearing, a testing bearing, a loading bearing and a sealing assembly, wherein at least two oil outlets are formed in the bottom of the box body, the oil outlets are located on two sides of the sealing assembly, the main shaft is rotatably connected into the box body through the supporting bearing and the testing bearing, the loading bearing is sleeved on the main shaft, the sealing assembly comprises at least two first baffles arranged on the box body and at least two second baffles fixed on the main shaft, the first baffles and the second baffles are alternately arranged along the axial direction of the main shaft, continuous overlapping areas exist in the projections of the cross sections of the main shaft of the first baffles and the second baffles, and gaps of 3-5mm exist in the axial direction of the main shaft of the first baffles and the adjacent second baffles. This scheme is used for alleviating the test device among the prior art and has the not tight problem that brings experimental accuracy and receive the influence of seal structure seal.

Description

Aviation lubricating oil deposition performance test device

Technical Field

The invention relates to the technical field of lubricating oil testing, in particular to an aviation lubricating oil deposition performance testing device.

Background

Aviation lubricating oil is a part of aviation oil, mainly provides lubricating, cooling and cleaning effects for key movable parts such as ball bearings, roller bearings and gears, and is an indispensable functional material for each system of aircrafts and turbofan engines.

Taking lubricating oil used by an aviation turbine engine as an example, the lubricating oil effectively lubricates high-temperature parts which move mutually in the turbine engine through a lubricating system and simultaneously takes away a large amount of heat of the high-temperature parts, so that the high-temperature parts of the engine can be relatively cooled and can be kept to stably run at a proper working temperature; in addition, in the lubricating system, when the lubricating oil is recovered, impurities existing in the engine are taken away, and the function of cleaning the turbine engine is realized. However, in the lubrication system, the lubricating oil is continuously circulated and used, and during the whole circulation process, the lubricating oil undergoes the continuous reciprocating processes of heat absorption, temperature rise, oxidation and cooling, so that reaction tendencies such as evaporation, coking, corrosion and the like are generated. It is necessary to study and evaluate the high temperature oxidation stability and antiwear properties of the lubricating oil.

In the prior art, aiming at aviation lubricating oil, a method meeting the FED-STD-791E method3410 standard or an equivalent substitution method is adopted to test the aviation lubricating oil (the test performed by the method is hereinafter collectively referred to as a 'deposition performance test'), the method needs to use a corresponding test device, the test device comprises a box body, a main shaft, a supporting bearing, a test bearing and a loading bearing, one end of the main shaft penetrates out of the box body to be connected with a power source, the other end of the main shaft penetrates into the box body, the main shaft is supported in the box body through the supporting bearing and the test bearing, the loading bearing is positioned between the supporting bearing and the test bearing, the loading bearing is externally connected with a radial loading mechanism to apply radial load to the main shaft through the loading bearing, the test bearing is installed on the main shaft, and meanwhile, a heating element (such as a heater) surrounding the test bearing is installed on the box body; the spiral sealing structure comprises an inner sleeve and an outer sleeve, the inner sleeve is rotatably connected to the main shaft, the outer sleeve is fixedly connected to a box body, the inner sleeve is provided with external threads, the outer sleeve is provided with internal threads meshed with the external threads, the box body is divided into a supporting oil cavity and a test oil cavity through the matching of the internal threads and the external threads, the test bearing is located in the test oil cavity, the supporting bearing and the loading bearing are both located in the supporting oil cavity, lubricating oil is respectively sprayed to three different bearings through different oil spray nozzles during testing, the supporting lubricating oil (hereinafter, referred to as supporting oil) is used for the loading bearing and the supporting bearing which are located in the supporting oil cavity, the test bearing is used for tested aviation lubricating oil (hereinafter, referred to as test oil), the temperature of the supporting oil sprayed to the corresponding bearing is 71-82 ℃, the temperature of the test oil sprayed to the test bearing is about 177 ℃, the rotating speed of the main shaft is about 10000r/min during testing, the temperature of a heating element is controlled to be about 260 ℃ during testing, and after a plurality of hours, the physical and chemical properties of the test oil, the oil consumption, the oil, the physical and the conditions such as oil consumption, oil, the high-temperature oxidation stability and the wear resistance of the bearing are judged.

However, a large number of repeatability tests show that the conventional spiral sealing structure is difficult to effectively seal the test oil cavity and the supporting oil cavity under the condition of high-speed rotation, so that the test oil in the test oil cavity is continuously leaked into the supporting oil cavity, and on one hand, the leakage of the test oil to the supporting oil cavity can cause inaccurate test of the test oil consumption and influence on the judgment accuracy of the test oil consumption; on the other hand, the lubricating oil used by the test oil and the supporting oil are different, the viscosity and the wear resistance of the supporting oil are higher than those of the test oil, and after the test oil is mixed, the viscosity and the wear resistance of the supporting oil are reduced, and the wear of the supporting bearing and the loading bearing is accelerated.

In addition, the radial loading mechanism of the existing test device has defects, because the radial loading mechanism used in the standard method is an air cylinder, the air cylinder is required to adopt high-pressure compressed air during the test to generate a vertical downward acting force on the loading bearing through a piston rod of the air cylinder (in the lubricating oil deposition performance test, the air cylinder needs to apply a force of about 2763N to a main shaft, and the diameter of the piston rod of the air cylinder is only about 10 cm), so that the loading bearing generates a downward moment, and the test bearing is loaded. However, the lubricating oil deposition performance test belongs to a durability test, the test time is long (the lubricating oil test time is different from 100 hours to 200 hours each time), the air cylinder sealing performance gradually fails along with the aging of the sealing ring along with the test progress, the loading pressure of the test bearing is gradually reduced, and the test accuracy is seriously influenced. Meanwhile, because the cylinder loading system bears high pressure and high load for a long time, the temperature generated by the high-speed rotation of the loading bearing along with the main shaft is transmitted to the cylinder, and the heating element is not far away from the cylinder, the temperature of the cylinder in the test process is high, and the cylinder loading system needs to be cooled by circulating cooling water, but along with the long-time test propulsion, a cooling water sealing gasket in the cylinder loading system is gradually aged to cause the water seepage condition, so that the test operation and the service life of a rack are seriously influenced.

Disclosure of Invention

The invention aims to provide an aviation lubricating oil deposition performance testing device to solve the problem that the testing accuracy is affected due to the fact that a sealing structure of the testing device in the prior art is not tight in sealing.

In order to achieve the purpose, the invention adopts the following technical scheme:

the aviation lubricating oil deposition performance test device comprises a box body, a main shaft, a supporting bearing, a test bearing, a loading bearing and a sealing assembly, wherein at least two oil outlet holes are formed in the bottom of the box body, the oil outlet holes are located in two sides of the sealing assembly, the main shaft is rotatably connected into the box body through the supporting bearing and the test bearing, the loading bearing is sleeved on the main shaft, the sealing assembly comprises at least two first baffles installed on the box body and at least two second baffles fixed on the main shaft, the first baffles and the second baffles are alternately arranged along the axial direction of the main shaft, continuous overlapping areas exist in the projections of the cross sections of the main shaft on the first baffles and the second baffles, and gaps of 3-5mm exist between the first baffles and the adjacent second baffles in the axial direction of the main shaft.

The principle and the advantages of the scheme are as follows: this scheme passes through seal assembly and separates the box for two cavities, and every cavity all has the oil outlet, and testing arrangement tests according to current method, and the lubricating oil that spouts to the bearing in the testing process can be discharged from the oil outlet of bottom half after falling.

In the sealing performance, firstly, the baffle plate II of the sealing assembly is fixed on the main shaft and synchronously rotates at a high speed along with the main shaft, the high-speed rotation of the baffle plate II in the closed box body can bring strong wind pressure, and the existence of the wind pressure can block the mist or drop-shaped lubricating oil (mist lubricating oil is hereinafter referred to as oil mist, and drop-shaped lubricating oil is hereinafter referred to as oil drop) from approaching the sealing assembly, so that the first-stage blocking of the lubricating oil on the two sides of the sealing assembly is formed; the baffle plates I and the baffle plates which are alternately arranged in the sealing assembly and have continuous overlapping areas on the cross section of the main shaft form layer-by-layer barriers for two chambers of the box body, so that secondary barriers are formed, the oil mist or oil drops can greatly reduce the migration speed under the secondary barriers even if the oil mist or oil drops cross the primary barriers, and the probability of the oil mist or oil drops migrating to the chamber on the other side is further reduced; in addition, the baffle plate in the middle area of the sealing assembly is far away from the supporting oil cavity and the test oil cavity, so that the temperature is low, oil drops are more easily formed when the oil mist contacts the lower-temperature baffle plate after deceleration, and the oil mist is further prevented from moving (can be regarded as three-stage blocking); therefore, the sealing assembly of the scheme forms heavy obstruction to oil mist or oil drops by a simple structure, so that the scheme has excellent sealing performance.

Through research, an inner sleeve of a spiral sealing structure in the prior art is arranged on a main shaft, and the main shaft can bear radial load from a loading bearing, so that the main shaft is subjected to bending deformation in long-time high-speed rotation, and in addition, the temperature in a box body is higher (the temperature can cause thermal expansion and cold contraction to generate deformation) during a test, so that the spiral sealing structure is influenced by the main shaft and the temperature, the meshing gap between an inner sleeve and an outer sleeve of the spiral sealing structure is changed, the meshing gap in a local area is increased, lubricating oil is moved, the meshing gap in the local area is reduced, the inner sleeve and the outer sleeve of the sealing structure are scratched, and the spiral sealing structure is damaged.

In the scheme, the first baffle plates and the second baffle plates are alternately arranged, and a gap with the axial direction of 3-5mm is formed between the first baffle plates and the second baffle plates, so that the sealing performance of the sealing assembly is not influenced under the condition that the main shaft is bent due to bearing of radial load; the deformation that two cavity temperature's in the box made expend with heat and contract with cold to bring for seal assembly both sides structure is different, also can not influence seal assembly's sealing performance completely because of the existence in clearance, has guaranteed that this device still can not reduce seal assembly's life because of the increase of experimental length on the basis that has excellent sealing performance.

In a word, the improvement of the sealing performance of the device is not only beneficial to the accuracy of the oil consumption test of aviation lubricating oil, but also can greatly reduce or even avoid the problem that the supporting bearing and the loading bearing are abraded after the lubricating oil is moved to another chamber of the box body, and the sealing assembly can not cut and rub the lubricating oil in a long-time test, so that the service life of the whole test device is greatly prolonged.

Preferably, a gap of 3-5mm exists between the first baffle and the outer surface of the main shaft, and a gap of 3-5mm exists between the second baffle and the inner wall of the box body.

Has the beneficial effects that: according to the scheme, only a 3-5mm gap exists between the first baffle and the main shaft, and only a 3-5mm gap also exists between the second baffle and the box body, namely, the continuous overlapping area existing in the projection of the cross section of the main shaft of the first baffle and the second baffle is larger, the difficulty of lubricating oil entering the space between the first baffle and the second baffle is further increased, and the sealing effect of the sealing assembly is favorably improved.

In addition, in a lubricating oil deposition performance test, the existence of the gap enables the first baffle plate and the second baffle plate to be in a thin plate shape (taking the second baffle plate as an example, if the second baffle plate adopts a disc structure, the outer diameter of the second baffle plate is about 230mm, the inner diameter of the second baffle plate sleeved on the main shaft is about 50mm, and the second baffle plate is only about 5mm thick), the thin plate-shaped baffle plate is beneficial to reducing the material cost of the sealing assembly and reducing the whole weight of the test device, and the gap enables the sealing assembly to reduce the processing technology requirements on the first baffle plate and the second baffle plate and the strength requirements on the first baffle plate and the second baffle plate on the basis of excellent sealing performance, low material cost and lighter weight, and further reduces the cost of the sealing assembly.

Preferably, as an improvement, the baffle I is arranged on both sides of the baffle II.

Has the advantages that: this scheme makes seal assembly be baffle one along the axial both ends of main shaft, and baffle one is installed on the box, and the free end of baffle one leans on to the main shaft for lubricating oil is difficult to get into between adjacent baffle one and the baffle two, is favorable to improving this test device's sealing performance.

Preferably, as an improvement, the bottom of the box body is further provided with an oil discharge hole, and the oil discharge hole is located between the adjacent baffles I.

Has the advantages that: when this scheme of adoption, if lubricating oil enters into between adjacent baffle one and the baffle two, then the lubricating oil that gets into also will fall into the box bottom under the effect of gravity and in time discharge along the oil extraction hole that sets up between adjacent baffle one, and then avoid the condition that the lubricating oil of box one side sneakes into opposite side lubricating oil completely.

Preferably, as an improvement, install radial loading mechanism on the box, radial loading mechanism includes load lever and pressure-bearing pole, and the load lever is located outside the box, and the vertical sliding connection of pressure-bearing pole is on the box, and the bottom of pressure-bearing pole supports and presses on load bearing's outer lane, and the load lever is pressed on the pressure-bearing pole, and the one end of load lever is rotated and is connected on the box.

Has the advantages that: when radial load is applied to the loading bearing through the radial loading mechanism, external force is applied to the free end of the loading rod (the external force application mode can be that a heavy object is hung to apply (for example, a weight is hung) or that the loading rod is pressed from top to bottom), so that the pressure-bearing rod bears the pressure from the loading rod, and the pressure is transmitted to the loading bearing to finish the application of the radial load. Compared with the prior art, the novel water cooling device has the advantages that only the pressure bearing rod stretches into the box body, the problem that in the prior art, the loading pressure is gradually reduced due to the fact that the cylinder is aged as the inner sealing ring of the cylinder brought by the radial loading mechanism can be avoided, the problem that the cylinder is cooled by independent circulating cooling water can be avoided, and the problem of water seepage caused by aging of the cooling water sealing gasket can be avoided.

In addition, this scheme is when radial loading, and the external force size that only needs the adjustment loading rod free end to apply just can adjust the size of applying the radial load on the loading bearing, compares the condition that the cylinder passes through high-pressure compressed gas adjustment radial load, and this scheme radial load's adjustment is simple and convenient more.

Preferably, as an improvement, a pressure sensor is arranged between the loading rod and the pressure bearing rod.

Has the advantages that: the magnitude of the radial loading load can be known very intuitively by means of the pressure sensor.

Preferably, as an improvement, a bearing seat is arranged between the supporting bearing and the box body, and the bearing seat and the baffle plate are both arranged on the same continuous surface of the inner wall of the box body.

Has the advantages that: the bearing frame and the baffle I of this scheme are all installed on the same surface of box inner wall for be integral to the box internal surface, compare the condition that different bearing frame, seal structure installed at the different internal surfaces of box among the prior art, this scheme is simpler to the processing technology of box, easily realizes the high accuracy processing of box.

In addition, the first baffle plates are all installed on the same inner surface of the box body, so that the shape and the size of the first baffle plates are completely the same, and the installation difficulty of the first baffle plates is reduced.

Preferably, as a refinement, the loading bearing, the support bearing and the test bearing are all mounted on the same continuous outer surface of the main shaft.

Has the advantages that: the scheme enables the loading bearing, the supporting bearing and the testing bearing to be located on the same section of optical axis of the main shaft, and the problem that stress concentration at the shaft shoulder position finally leads to the main shaft to be easily broken under high-speed rotation due to the fact that the shaft shoulder is designed on the main shaft near different bearings in the prior art is solved.

In addition, this scheme is the smooth shaft section with one section design of main shaft installation loading bearing, support bearing and test bearing, easily realizes the high accuracy processing of smooth shaft section, avoids the machining error because of a plurality of shaft shoulder designs bring.

Preferably, as an improvement, be equipped with the shaft shoulder on the main shaft, the free end of main shaft is connected with the retaining member, and retaining member and shaft shoulder are located the both ends of box, and the cover has a plurality of fixed covers on the main shaft, and a plurality of fixed covers are used for filling the main shaft and install the clearance that leaves behind support bearing, loading bearing, experimental bearing and the baffle two between shaft shoulder and retaining member.

Has the advantages that: the clearance behind bearing and the second baffle on the main shaft is filled up through fixed cover to this scheme for the part (support bearing, loading bearing, experimental bearing and a plurality of second baffle) of main shaft installation between shaft shoulder and retaining member can simple to operate can realize firm installation again.

Preferably, as an improvement, the retaining member adopts lock nut, is equipped with the gasket between lock nut and the experimental bearing, and lock nut can pass through screw and gasket fixed connection.

Has the advantages that: after the test bearing is installed on the main shaft through the gasket by the locking nut, the locking nut and the gasket are fixedly connected through the screw, the operation is simple and convenient, the locking effect of the locking nut is improved, and the condition that the locking nut is unscrewed due to reverse rotation of the main shaft is avoided.

Preferably, as an improvement, a packing assembly is further installed in the box body, the packing assembly and the sealing assembly seal a chamber where the support bearing is located in the box body, the packing assembly comprises at least two third baffles installed in the box body and at least two fourth baffles installed on the main shaft, and the third baffles and the fourth baffles are alternately arranged along the axial direction of the main shaft.

Has the advantages that: the sealing effect of the supporting oil cavity of one end of the box body is penetrated out of the main shaft through the packing assembly similar to the sealing assembly in structure, the sealing effect is guaranteed, and meanwhile the problem that the sealing ring is easy to wear and tear caused by the fact that the end cover is matched with the sealing ring to penetrate out the box body of the main shaft to seal the main shaft in the prior art is also solved.

Drawings

FIG. 1 is a front cross-sectional view of an embodiment of the present invention.

Fig. 2 is a schematic view of the connection relationship between the sealing assembly of fig. 1 and the housing and the main shaft.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the oil injection device comprises a box body 1, an end cover 11, an oil outlet 12, an oil discharge hole 13, an oil return hole 14, a main shaft 2, a shaft shoulder 21, a support bearing 3, a test bearing 4, a loading bearing 5, a sealing assembly 60, a packing assembly 70, a radial loading mechanism 8, a first baffle plate 61, a second baffle plate 62, a third baffle plate 71, a fourth baffle plate 72, a recovery container 6, a heating element 7, a loading rod 81, a pressure bearing rod 82, a pressure sensor 83, a weight 84, a locking nut 10, a gasket 20 and an oil nozzle 30.

The embodiment is basically as shown in the attached drawings 1 and 2, the aviation lubricating oil deposition performance testing device comprises a box body 1, a main shaft 2, a supporting bearing 3, a testing bearing 4, a loading bearing 5, a sealing assembly 60, a packing assembly 70 and a radial loading mechanism 8, wherein the main shaft 2 is rotatably connected in the box body 1 through the supporting bearing 3 and the testing bearing 4, the loading bearing 5 is sleeved on the main shaft 2, the sealing assembly 60 is positioned between the testing bearing 4 and the loading bearing 5, the packing assembly 70 and the loading bearing 5 are positioned on two sides of the supporting bearing 3, and the radial loading mechanism 8 is used for applying a radial load to the loading bearing 5.

The main shaft 2 is integrally formed with a shoulder 21 at one end (i.e. the left side of the present embodiment) of the packing assembly 70 far away from the support bearing 3, and the shoulders 21 are no longer arranged at two sides of the shoulder 21 of the main shaft 2, so that the problem that the main shaft 2 is easy to break due to the fact that the stress concentration position on the main shaft 2 is close to the bearing is avoided.

The inner wall of the box body 1 is cylindrical, end covers 11 are fixed at two ends of the box body 1, a clearance hole for the main shaft 2 to pass through is formed in one end cover 11, the other end of the box body 1 is sealed by the other end cover 11, at least two oil outlet holes 12 are formed in the bottom of the box body 1, the end cover 11 without the clearance hole is formed in the end cover 11, the sealing assembly 60 and the packing assembly 70 divide the box body 1 into a supporting oil cavity and a test oil cavity, the supporting oil cavity is located on the left side of the box body 1 in the embodiment, the test oil cavity is located on the right side of the box body 1, 3 oil outlet holes 12 are formed in the bottom of the box body 1 on one side of the supporting oil cavity, 2 oil outlet holes 12 are formed in the bottom of the box body 1 on one side of the test oil cavity, the oil-water separator further comprises two recovery containers 6 for recovering lubricating oil, and the two recovery containers 6 are respectively used for recovering the lubricating oil of the supporting oil cavity and the lubricating oil of the test oil cavity.

The sealing assembly 60 comprises at least two first baffles 61 arranged on the box body 1 and at least two second baffles 62 fixed on the main shaft 2, the first baffles 61 and the second baffles 62 are alternately arranged along the axial direction of the main shaft 2, a continuous overlapping area exists in the projection of the first baffles 61 and the second baffles 62 on the cross section of the main shaft 2, and a gap of 3-5mm exists between the first baffles 61 and the adjacent second baffles 62 in the axial direction of the main shaft 2; a gap of 3-5mm exists between the first baffle 61 and the outer surface of the main shaft 2, and a gap of 3-5mm exists between the second baffle 62 and the inner wall of the box body 1. In the embodiment, the first baffle 61 is annular, and the second baffle 62 is disc-shaped; the number of the first baffle 61 is 1 more than that of the second baffle 62, the first baffle 61 is arranged on each of two sides of the second baffle 62, the number of the first baffle 61 is 5 in the embodiment, and the number of the second baffle 62 is 4.

An oil discharge hole 13 is further processed at the bottom of the box body 1, the oil discharge hole 13 is positioned between the adjacent baffles 61, the oil discharge hole 13 positioned at the left half part of the sealing assembly 60 is communicated with the recovery container 6 for collecting supporting oil, and the oil discharge hole 13 positioned at the right half part of the sealing assembly 60 is communicated with the recovery container 6 for collecting test oil.

For the convenience of bearing installation, set up the bearing frame between support bearing 3 and box 1, set up between test bearing 4 and box 1, bearing frame and baffle 61 are all installed at the same continuous surface of box 1 inner wall, in order to make things convenient for box 1 as integral box 1, and the installation face of box 1 is same internal surface, when making things convenient for box 1 shaping, reduce the machining precision control degree of difficulty of box 1 internal surface, make things convenient for the installation face to realize high accuracy processing, the cover is equipped with a plurality of separating sleeves on the installation face of box 1, separate the cover and use in filling the clearance between the part on the installation face, for example fill the clearance between the adjacent baffle 61, fill the clearance between baffle 61 and the bearing frame.

Radial loading mechanism 8 includes loading rod 81, pressure-bearing rod 82, pressure sensor 83 and weight 84, loading rod 81 is located outside box 1, the vertical sliding connection of pressure-bearing rod 82 is on box 1, the bottom of pressure-bearing rod 82 supports and presses on the outer lane of loading bearing 5, loading rod 81 presses at pressure-bearing rod 82 top, the right-hand member of loading rod 81 rotates through ball-hinged mode and connects on box 1, external force can be applyed to the left end (also being the free end) of loading rod 81, the external force is applyed to the mode that adopts suspension weight 84 in this embodiment, pressure sensor 83 installs at pressure-bearing rod 82 top.

In addition, in order to ensure that the test apparatus performs a deposition performance test of the lubricating oil, a heating element 7 is installed in a bearing housing in which the test bearing 4 is installed.

The loading bearing 5, the supporting bearing 3 and the test bearing 4 are all directly mounted or indirectly mounted on the same continuous outer surface of the main shaft 2 through the arranged fixed seats.

The free end of the main shaft 2 is in threaded connection with a locking nut 10, the locking nut 10 and the shaft shoulder 21 are located at two ends of the box body 1, the main shaft 2 is sleeved with a plurality of fixing sleeves, and the fixing sleeves are used for filling gaps left after the main shaft 2 is provided with the supporting bearing 3, the loading bearing 5, the testing bearing 4 and the second baffle plate 62 between the shaft shoulder 21 and the locking nut 10.

A gasket 20 is arranged between the locking nut 10 and the test bearing 4, the gasket 20 is sleeved on the main shaft 2, two kidney-shaped holes are formed in the end face of the locking nut 10, and screws penetrate through the kidney-shaped holes to form axial fixed connection between the locking nut 10 and the gasket 20, so that the locking nut 10 cannot be unscrewed when the main shaft 2 is driven by a power source to rotate reversely.

The packing assembly 70 has the same structure as the sealing assembly 60, the packing assembly 70 includes at least two third baffles 71 installed in the box 1 and at least two fourth baffles 72 fixed on the main shaft 2, the third baffles 71 and the fourth baffles 72 are alternately arranged along the axial direction of the main shaft 2, and in this embodiment, there are 2 third baffles 71 and 2 fourth baffles 72.

The bottom of the box body 1 corresponding to each baffle plate four 72 is provided with an oil return hole 14, and the oil return hole 14 is communicated with a recovery container 6 for collecting and supporting oil.

Three oil nozzles 30 are further mounted on the box body 1, and the three oil nozzles 30 are respectively opposite to the support bearing 3, the loading bearing 5 and the test bearing 4.

The specific implementation process is as follows:

the testing device of the embodiment is adopted to carry out the test according to the FED-STD-791E Method3410 standard Method or an equivalent substitution Method, the oil nozzle 30 sprays corresponding lubricating oil to the corresponding supporting bearing 3, loading bearing 5 and testing bearing 4 respectively in the testing process, the loading bearing 5 generates radial load to the spindle 2 by hanging the weight 84 on the loading rod 81 of the radial recording mechanism 80, and the supporting oil and the testing oil generated in the test are recovered into the corresponding recovery container 6 through the oil outlet 12, the oil outlet 13 and the oil return hole 14 so as to recycle the corresponding lubricating oil.

In the test process, firstly, the baffle plate II 62 of the sealing component 60 is fixed on the main shaft 2 and synchronously runs at a high speed along with the main shaft 2, the baffle plate II 62 rotates at a high speed in the closed box body 1 to bring strong wind pressure, and the wind pressure can block mist or drop-shaped lubricating oil (mist lubricating oil is hereinafter referred to as oil mist, and drop-shaped lubricating oil is hereinafter referred to as oil drop) from approaching the sealing component 60, so as to form a primary block for the lubricating oil at two sides of the sealing component 60; the baffle I61 and the baffle II 62 which are alternately arranged in the sealing component 60 and have continuous overlapping areas on the cross section of the main shaft 2 form layer-by-layer barriers for two chambers of the box body 1, so that a secondary barrier is formed, oil mist or oil drops can greatly reduce the migration speed under the secondary barrier even if passing through the primary barrier, and the probability of the oil mist or the oil drops migrating to the chamber on the other side is further reduced; in addition, the baffle plate in the middle area of the sealing assembly 60 is at a lower temperature due to being far away from the supporting oil chamber and the test oil chamber, so that oil drops are more easily formed and fall when the oil mist contacts the lower temperature baffle plate after deceleration, and the oil mist is further prevented from moving (the oil mist can be regarded as three-stage blocking); it can be seen that the seal assembly 60 of the present embodiment forms a heavy barrier to oil mist or oil droplets with a simple structure, so that the sealing performance of the present embodiment is very excellent; even if oil mist still forms oil drops to enter between the adjacent first baffle plates 61 under the action of heavy blockage, the entering lubricating oil also falls into the bottom of the box body 1 under the action of gravity and is timely discharged along the oil discharge hole 13 arranged between the adjacent first baffle plates 61, and the condition that the lubricating oil on one side of the box body 1 is mixed into the lubricating oil on the other side is completely avoided.

In addition, in the embodiment, the first baffle plates 61 and the second baffle plates 62 are alternately arranged, gaps with the axial length of 3-5mm are formed between the first baffle plates 61 and the second baffle plates 62, only radial gaps with the length of 3-5mm are formed between the first baffle plates 61 and the main shaft 2, and only radial gaps with the length of 3-5mm are formed between the second baffle plates 62 and the box body 1, so that the sealing performance of the sealing assembly 60 is not influenced even if the main shaft 2 is bent due to the radial load; the deformation that two cavity temperature's in the box 1 make expend with heat and contract with cold bring for seal assembly 60 both sides structure is different, also can not influence seal assembly 60's sealing performance completely because of the existence in clearance, has guaranteed that this device still can not reduce seal assembly 60's life because of the increase of test duration on the basis that has excellent sealing performance.

And during the loading of radial load, only need adjust the size that the radial load that applies on loading bearing 5 can be adjusted to the weight 84 weight that hangs at the free end of loading pole 81, compare the condition that the cylinder passes through high-pressure compressed gas adjustment radial load, the adjustment of this embodiment radial load is more simple and convenient, and the radial loading mechanism 8 of this embodiment can not have the problem that loading load is undulant, the part is ageing easily and the loading mechanism infiltration.

Besides, the arrangement of the packing assembly 70 of this embodiment ensures the sealing effect of the supporting oil cavity, and at the same time, avoids the problem that the sealing ring is easily worn due to the fact that the end cover 11 is used to cooperate with the sealing ring to seal the position where the main shaft 2 penetrates out of the box body 1 in the prior art.

In a word, no matter the structure of this device is seal structure, radial loading mode or main shaft 2 all greatly improves on prior art for aviation lubricating oil's oil consumption test accuracy can guarantee under the lubricating oil deposit performance test, can greatly reduced again and avoid the scurrying of lubricating oil even, reduce and avoid the problem that appears because of the wearing and tearing of fluid channeling support bearing 3 and loading bearing 5, and seal assembly 60 self also can not cut the piece and rub in long-time experiment, radial loading mechanism 8's loading mode is simple and convenient more and secure, main shaft 2 and box 1 intensity are also accomplished higher easily, whole test device's life has greatly been prolonged.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, and these should also be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. Aviation lubricating oil deposition performance test device, including box, main shaft, supporting bearing, experimental bearing, loading bearing and seal assembly, the bottom half is equipped with two at least oil outlets, and the oil outlet is located the seal assembly both sides, and the main shaft passes through supporting bearing and experimental bearing and rotates to be connected in the box, and the loading bearing housing is on the main shaft, its characterized in that: the sealing assembly comprises at least two first baffles and at least two second baffles, the first baffles and the second baffles are arranged on the box body in an alternating mode along the axial direction of the main shaft, the first baffles and the second baffles have continuous overlapping areas in the projection of the cross section of the main shaft, and gaps of 3-5mm exist between the first baffles and the adjacent second baffles in the axial direction of the main shaft.

2. The aviation lubricating oil deposition performance test device of claim 1, wherein: a gap of 3-5mm exists between the first baffle and the outer surface of the main shaft, and a gap of 3-5mm exists between the second baffle and the inner wall of the box body.

3. The aviation lubricating oil deposition performance test device of claim 2, wherein: and the first baffle is arranged on both sides of the second baffle.

4. The aviation lubricating oil deposition performance test device of claim 1, wherein: and an oil discharge hole is also formed in the bottom of the box body and is positioned between the adjacent first baffle plates.

5. The aviation lubricating oil deposition performance test device of claim 1, wherein: the box body is provided with a radial loading mechanism, the radial loading mechanism comprises a loading rod and a pressure bearing rod, the loading rod is positioned outside the box body, the pressure bearing rod is vertically and slidably connected to the box body, the bottom of the pressure bearing rod is abutted against the outer ring of the loading bearing, the loading rod is pressed on the pressure bearing rod, and one end of the loading rod is rotatably connected to the box body.

6. The aviation lubricating oil deposition performance test apparatus of claim 5, wherein: and a pressure sensor is arranged between the loading rod and the pressure bearing rod.

7. The aviation lubricating oil deposition performance test device of claim 1, wherein: bearing blocks are arranged between the supporting bearing and the box body, between the testing bearing and the box body, and the bearing blocks and the baffle plates are both arranged on the same continuous surface of the inner wall of the box body.

8. The aviation lubricating oil deposition performance test device of claim 1, wherein: the loading bearing, the supporting bearing and the test bearing are all arranged on the same continuous outer surface of the main shaft.

9. The aviation lubricating oil deposition performance test apparatus of claim 8, wherein: be equipped with the shaft shoulder on the main shaft, the free end of main shaft is connected with the retaining member, and retaining member and shaft shoulder are located the both ends of box, and the cover has a plurality of fixed covers on the main shaft, and a plurality of fixed covers are used for filling the main shaft and install the clearance that the support bearing, loading bearing, experimental bearing and baffle are left behind two between shaft shoulder and retaining member.

10. The aviation lubricating oil deposition performance test apparatus according to any one of claims 1 to 9, wherein: the sealing assembly and the sealing assembly seal a chamber where the bearing is arranged in the box body, the sealing assembly and the sealing assembly seal the chamber, the sealing assembly comprises at least two third baffles arranged in the box body and at least two fourth baffles arranged on the main shaft, and the third baffles and the fourth baffles are alternately arranged along the axial direction of the main shaft.

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