CN214405563U - Lubricating oil system and engine test device - Google Patents

Abstract

The utility model provides a lubricating oil system and engine test device. The lubricating oil system comprises an oil storage container, an oil supply pipeline, an oil return pipeline and a valve group, wherein two ends of the oil supply pipeline are respectively connected with the oil storage container and the test section, and two ends of the oil return pipeline are respectively connected with the oil storage container and the valve group; the valves include two oil return valves, the output end of each oil return valve is connected with an oil return pipeline, the input end of each oil return valve is connected with the test section, the input ends of the two oil return valves are arranged oppositely, each oil return valve comprises a first valve body and a first valve core, and the first valve core can move inside the first valve body under the action of self gravity so that the oil return valves are opened or closed. The engine test device comprises the lubricating oil system, the valve groups are arranged in a plurality of, the valve groups are all connected to the supporting seat, and the valve groups are distributed along the circumferential direction of the supporting seat. The utility model provides a lubricating oil system and engine test device, the oil return is efficient, is difficult for appearing the condition of oil return difficulty.

Description

Lubricating oil system and engine test device

Technical Field

The utility model relates to an aeroengine tests technical field, especially relates to a lubricating oil system and engine test device.

Background

At present, some researchers can utilize some attitude test beds to perform simulation tests on the engine or some parts to be tested of the engine, and the test beds can simulate the maneuvering actions of yawing, pitching, rolling and the like in the actual flying process of the airplane. During the testing of the engine, it is necessary to supply lubricating oil or pressure oil to a bearing or squeeze film damper or the like mounted on a test stand. However, the test bed has deflection in different directions or angles during operation, so that the problem of difficult oil return of an oil lubricating system connected with the test bed is easily caused, and the normal operation of an engine test is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lubricating oil system, this lubricating oil system still can return oil smoothly when the test section takes place to deflect.

The utility model discloses still provide an engine test device who has above-mentioned lubricating oil system.

According to the utility model discloses a lubricating oil system of first aspect embodiment includes: an oil storage container capable of storing the lubricating oil; the two ends of the oil supply pipeline are respectively connected with the oil storage container and the test section; the oil return pipeline is connected with the oil storage container; the valve bank comprises two oil return valves, the output ends of the oil return valves are connected with one ends, far away from the oil storage container, of the oil return pipelines, the input ends of the oil return valves are connected with the test section, the input ends of the oil return valves are arranged oppositely, each oil return valve comprises a first valve body and a first valve core, the first valve core is installed inside the first valve body, and the first valve core can move inside the first valve body under the action of self gravity, so that the oil return valves are opened or closed.

According to the utility model discloses lubricating oil system has following beneficial effect at least: under the condition that the test section deviates and inclines, the first valve core of one oil return valve slides under the action of self gravity, so that the oil return valve is in an open state, lubricating oil can still effectively contact at least one oil return valve and enters an oil return pipeline through the oil return valve to realize oil return, and the phenomenon of difficult oil return is avoided.

According to some embodiments of the utility model, first valve body with the equal cavity of first case sets up, first valve body includes oil seal, oil seal sets up the inside of first valve body, just oil seal with the lateral wall of first valve body links to each other, be equipped with in the oil seal and supply the oilhole of crossing that lubricating oil passes through, the lateral wall of first case is seted up and is supplied the valve oil gallery that lubricating oil passes through, the tip of first case can support and hold oil seal is in order to seal cross the oilhole.

According to some embodiments of the utility model, the lubricating oil system includes that bearing fuel feeding nozzle and attenuator fuel feeding nozzle, bearing fuel feeding nozzle with attenuator fuel feeding nozzle all connects supply the oil pipe way to keep away from the one end of oil storage container, bearing fuel feeding nozzle with attenuator fuel feeding nozzle all imbeds in the experimental section.

According to some embodiments of the utility model, the lubricating oil system still includes the oil return pump, the oil return pump sets up on the oil return pipeline, the oil return pump is used for the drive lubricating oil is followed it flows extremely to return the oil return pipeline in the oil storage container.

According to the utility model discloses a some embodiments, the lubricating oil system still includes overflow pipeline and overflow valve, the both ends of overflow pipeline respectively with supply oil pipe with return oil pipe and connect, the overflow valve sets up on the overflow pipeline, the overflow valve is used for control the break-make of overflow pipeline.

According to the utility model discloses a some embodiments, the lubricating oil system still includes the oil return cooler, the oil return cooler sets up on the oil return pipeline, the oil return cooler can be right return in the oil return pipeline lubricating oil cools off.

According to the utility model discloses an engine test device of second aspect embodiment includes the lubricating oil system as described above.

According to the utility model discloses basic slewing mechanism dynamics test device has following beneficial effect at least: difficult oil return, high oil return efficiency and low failure rate.

According to some embodiments of the utility model, the engine test device includes bearing and atmospheric pressure balanced valve, the inside of bearing has can the holding the oil collecting chamber of lubricating oil, the output of atmospheric pressure balanced valve and the input of time oil return valve all with the bearing is connected, pressure differential change between the input of atmospheric pressure balanced valve and the output can make the atmospheric pressure balanced valve is opened or is closed.

According to some embodiments of the utility model, the atmospheric pressure balanced valve includes second case, second valve body and elastic component, the second valve body with the equal cavity of second case sets up, the second case with the elastic component all sets up inside the second valve body, the second valve core includes gas seal portion, gas seal portion sets up the inside of second valve body, just gas seal portion with the lateral wall of second valve body links to each other, gas seal portion has seted up the gas pocket, atmospheric pressure balanced hole has been seted up to the lateral wall of second case, the elastic component can make the tip and the gas seal portion of second case keep supporting the state, in order to seal the gas pocket.

According to the utility model discloses a some embodiments, engine test device includes the bearing, the valves is equipped with a plurality ofly, and is a plurality of the valves is all connected on the bearing, and is a plurality of the valves is followed the circumference of bearing distributes.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

FIG. 1 is a simplified schematic diagram of an engine testing apparatus in some embodiments;

FIG. 2 is a schematic diagram of an oil circuit of an oil system according to some embodiments;

FIG. 3 is a schematic illustration of an oil supply line in the lubrication system shown in FIG. 2;

FIG. 4 is a schematic illustration of a return line in the oil system of FIG. 2;

FIG. 5 is a schematic perspective view of an integrated oil station in some embodiments;

FIG. 6 is a partial schematic view of another angle of the integrated oil station shown in FIG. 5;

FIG. 7 is a front view of a test section in some embodiments;

FIG. 8 is a top view of the test segment shown in FIG. 7;

FIG. 9 is a perspective view of a backup pad in accordance with certain embodiments;

FIG. 10 is a partial cross-sectional view of a backup pad in some embodiments;

FIG. 11 is a schematic diagram of a change in state of a scavenge valve in some embodiments;

FIG. 12 is a schematic view of the internal structure of the air pressure balance valve in some embodiments;

FIG. 13 is a top view of a support block in some embodiments;

FIG. 14 is a cross-sectional view of the backup pad of FIG. 13 taken along section A-A;

FIG. 15 is a sectional view of the bearing housing shown in FIG. 13 taken along section B-B (in a state where a bearing is mounted);

FIG. 16 is a front view of a backup pad in some embodiments;

figure 17 is a cross-sectional view of the backup pad shown in figure 16 taken along section C-C.

Reference numerals: 101-test section, 102-rotary table, 201-integrated oil station, 202-oil storage container, 203-oil supply pipeline, 204-oil return pipeline, 205-valve group, 206-supporting seat, 207-liquid level meter, 208-oil tank thermometer, 209-air filter, 210-oil supply pump, 211-oil suction filter, 212-oil supply filter, 213-electric liquid proportional valve, 214-fine filter, 215-pressure transmitter, 216-oil return pump, 217-overflow pipeline, 218-oil return temperature sensor, 219-oil return cooler, 220-oil return filter, 221-overflow valve, 222-overflow pressure gauge, 223-hose, 224-oil supply temperature sensor, 225-oil discharge valve, 701-base, 703-rotor test piece, 704-a driving motor, 901-an oil return valve, 902-an air pressure balance valve, 1001-an oil collecting cavity, 1101-a first valve body, 1102-a first valve core, 1103-an oil sealing part, 1104-an oil passing hole, 1105-a valve oil return hole, 1201-a second valve body, 1202-a second valve core, 1203-an elastic part, 1204-an air sealing part, 1205-a limiting part, 1206-an air passing hole, 1207-an air pressure balance hole, 1401-a first mounting cavity, 1402-a first oil nozzle mounting hole, 1403-a bearing oil supply flow channel, 1404-a process blind hole, 1405-a support seat oil return hole, 1406-a second mounting cavity, 1501-a bearing, 1701-a second oil nozzle mounting hole and 1702-a damper oil supply flow channel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, and a plurality of means are two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1, 7 and 8, a rotor test piece 703 to be tested (i.e., a part to be tested of an engine) is mounted on a test section 101, the test section 101 is mounted on a turntable 102 rotatable by multiple shafts, and a lubricating oil system for supplying lubricating oil to the test section 101 is connected to the test section 101. Referring to fig. 7 to 9, test section 101 includes a base 701, a supporting seat 206, and a driving motor 704, where supporting seat 206 and driving motor 704 are both installed on base 701, driving motor 704 is connected to rotor test piece 703 (specifically, may be connected by a coupling, which is not shown in detail in the figures), and driving motor 704 is used to drive rotor test piece 703 to rotate. Referring to fig. 13 to 15, the bearing base 206 includes a first mounting cavity 1401, and a bearing 1501 for supporting a rotating shaft of the rotor test piece 703 and a squeeze film damper (not shown) for damping vibration may be mounted in the first mounting cavity 1401, and the squeeze film damper may be fitted around the outer circumference of the bearing 1501. The lubricating oil system mainly supplies oil to the bearing 1501 and the squeeze film damper, and it should be noted that, for the bearing 1501, the lubricating oil provided by the lubricating oil system plays a role in lubricating, and for the squeeze film damper, the lubricating oil provided by the lubricating oil system is mainly used for forming an oil film between an inner ring and an outer ring of the squeeze film damper. The specific structure of the bearing and squeeze film damper is well known in the art and will not be described in detail herein.

Referring to fig. 2 to 6, the present invention provides a lubricating oil system, which includes an oil storage container 202, an oil supply pipeline 203, an oil return pipeline 204 and a valve group 205. The oil reservoir 202 is used for storing lubricating oil; the two ends of the oil supply pipeline 203 are respectively connected with the oil storage container 202 and the test section 101; one end of the oil return pipeline 204 is connected with the oil storage container 202, the other end of the oil return pipeline 204 is connected with the valve group 205, and the valve group 205 is connected with the test section 101. Referring to fig. 9 and 10, the valve set 205 includes two oil return valves 901, an input end of each oil return valve 901 is connected to the test bench, an output end of each oil return valve 901 is connected to the oil return pipeline 204 (the two oil return valves 901 are connected in parallel), and input ends of the two oil return valves 901 are arranged oppositely. Referring to fig. 9, the support base 206 is provided with one oil return valve 901 at the same angular position on the left and right side surfaces thereof, and referring to fig. 10, the input end of the left oil return valve 901 faces the right, and the input end of the right oil return valve 901 faces the left. The scavenge valve 901 includes a first valve body 1101 and a first spool 1102, the first spool 1102 being mounted inside the first valve body 1101, the first spool 1102 being capable of moving under its own weight to open or close the scavenge valve 901.

It should be noted that the "input end" and the "output end" of the oil return valve 901 are based on the flowing direction of the lubricating oil, the end of the oil return valve 901 where the lubricating oil flows in is an input end, and the end of the oil return valve 901 where the lubricating oil flows out is an output end, taking fig. 11 as an example, the input end of the oil return valve 901 corresponds to the left end of the oil return valve 901, and the output end of the oil return valve 901 corresponds to the right end of the oil return valve 901. In addition, for the oil return pipeline 204, the oil supply pipeline 203 and other pipelines in the present invention, the "pipeline" may be specifically a pipe, or a pipe group formed by connecting a plurality of pipes.

Referring to fig. 11, in some embodiments, the first valve body 1101 and the first valve core 1102 are both hollow, the first valve body 1101 has an oil sealing portion 1103 therein, the oil sealing portion 1103 is connected to a side wall of the first valve body 1101, the oil sealing portion 1103 defines an oil passing hole 1104, an end of the first valve core 1102 can abut against the oil sealing portion 1103 to close the oil passing hole 1104, and a valve oil return hole 1105 is defined in a side wall of the first valve core 1102. Referring to the upper half of fig. 11, when the end of the first valve element 1102 abuts against the oil seal portion 1103, the oil passing hole 1104 is closed by the first valve element 1102, the lubricating oil cannot pass through the oil passing hole 1104, the lubricating oil cannot flow from the input end of the oil return valve 901 to the output end of the oil return valve 901, and the oil return valve 901 is in a closed state at this time. Referring to the lower half of fig. 11, when the output end of the return valve 901 is inclined and oriented to the right downward (the same effect can be achieved when the output end of the return valve 901 is oriented to the downward direction or the left downward direction), the return valve 901 is in an open state. The first spool 1102 slides toward the output end of the oil return valve 901 by its own weight, the end of the first spool 1102 is separated from the oil seal portion 1103, and the lubricating oil can pass through the oil passing hole 1104. After passing through the oil hole 1104, the lubricant will enter the cavity inside the first spool 1102 from the valve oil return hole 1105 on the side wall of the first spool 1102, and the lubricant inside the first spool 1102 can then directly flow to the output end of the oil return valve 901.

The lubricating oil conveyed to the test section 101 flows to the supporting seat 206, after the lubricating oil enters the supporting seat 206, the lubricating oil flows to the bearing and the squeeze film damper through some flow channels in the supporting seat 206, the lubricating oil flowing through the bearing and the squeeze film damper also flows to an oil collecting cavity 1001 in the supporting seat 206 through some flow channels in the supporting seat 206 (the position of the oil collecting cavity 1001 can be referred to as fig. 10), and the lubricating oil in the oil collecting cavity 1001 enters the oil return pipeline 204 through the oil return valve 901 and flows back to the oil storage container 202 along the oil return pipeline 204. When the test section 101 tilts or deflects under the action of the turntable 102, the lubricating oil in the oil collecting cavity 1001 can still effectively contact the oil return valve 901. Taking fig. 10 as an example, for the oil return valve 901 on the right side, the left end is an input end, and the right end is an output end; for the left oil return valve 901, the right end is an input end, and the left end is an output end. Since the liquid level of the lubricant is kept horizontal, when the upper end of the supporting seat 206 is inclined to the left by a large angle, the left-side oil return valve 901 is in contact with the lubricant, the right-side oil return valve 901 is not in contact with the lubricant, and at this time, the output end of the left-side oil return valve 901 is directed to the left lower side, the output end of the right-side oil return valve 901 is directed to the right upper side, the left-side oil return valve 901 is in an open state, the right-side oil return valve 901 is in a closed state, and the lubricant flows out from the left-side oil return valve 901. Similarly, when the upper end of the support base 206 is inclined at a large angle to the right, the right oil return valve 901 is in contact with the lubricating oil and is in an open state, and the lubricating oil flows out from the right oil return valve 901. Therefore, the utility model provides a lubricating oil system takes place under the condition of skew, slope at experimental section 101, lubricating oil still can contact at least one oil return valve 901 effectively and get into oil return pipe 204 through oil return valve 901 in order to realize the oil return, has avoided the oil return difficulty.

In some embodiments, the lubrication system includes a bearing oil supply nozzle and a damper oil supply nozzle (not shown in detail), both of which are connected to an end of the oil supply line 203 remote from the oil reservoir 202, through which lubricating oil can be sprayed or flowed out. Referring to fig. 13 and 14, support base 206 has first nozzle mounting hole 1402 and bearing oil supply flow passage 1403, first nozzle mounting hole 1402 communicates with bearing oil supply flow passage 1403, the bearing oil supply nozzle is fitted into first nozzle mounting hole 1402, and lubricating oil is injected from the bearing oil supply nozzle and then enters bearing oil supply flow passage 1403; at the outlet of the bearing oil supply passage 1403, an oil spray ring (not shown) corresponding to an annular oil spray member is provided, and the lubricating oil flowing out of the bearing oil supply passage 1403 flows to the oil spray ring, and the oil spray ring sprays oil to the bearing (from right to left with reference to the direction of fig. 14). A portion of spray ring and rotor trial 703 would be mounted in second mounting cavity 1406. In fig. 14, a blind via 1404 is located above the first nozzle mounting hole 1402, and the blind via 1404 is plugged in actual use, so that the lubricating oil does not flow into the blind via 1404. Similarly, referring to fig. 16 and 17, the support has a second nozzle mounting hole 1701 into which the damper oil feed passage 1702 is fitted, and the damper oil feed passage 1702 is located below the second nozzle mounting hole 1701, and the damper oil feed passage 1702 communicates with the second nozzle mounting hole 1701 (above the second nozzle mounting hole 1701 is a blind process hole 1404). An outlet of the damper oil supply passage 1702 is located on the side wall of the first mounting chamber 1401, and the lubricating oil flowing out of the damper oil supply passage 1702 can enter the squeeze film damper through an oil inlet hole on the outer wall of the outer ring of the squeeze film damper. After flowing through the bearings and squeeze film damper, the lubricating oil enters the oil collection chamber 1001 through a plurality of backup pad oil return holes 1405 in the side wall of the first mounting chamber 1401 (the channel of the backup pad oil return holes 1405 is not shown in detail).

The entire flow path of the lubricating oil will be described with reference to fig. 2. The engine test device comprises an integrated oil station 201, a rotary table 102 and a test section 101, wherein the test section 101 is installed on the rotary table 102, the integrated oil station 201 and the test section 101 which are separated from each other are connected through a hose 223 (for example, the hose 223 can be made of plastic materials), and relatively speaking, the hose 223 is not easy to damage when the rotary table 102 inclines and rotates. A plurality of components in the oil lubrication system are distributed at different positions or areas, and some components that are not suitable for receiving vibration or for frequently switching postures may be provided in the integrated oil station 201, for example, the oil storage container 202 may be provided in the integrated oil station 201. The integrated oil station 201 comprises a liquid level meter 207, a tank thermometer 208 and an air filter 209, wherein the liquid level meter 207 is used for detecting the liquid level of the oil storage container 202, the tank thermometer 208 is used for detecting the temperature of lubricating oil in the oil storage container 202, and the air filter 209 is used for filtering air so as to prevent impurities in the air from entering the oil storage container 202 and polluting the lubricating oil. The oil system further comprises an oil drain valve 225, the oil drain valve 225 is connected to the oil reservoir 202, and when the oil in the oil reservoir 202 needs to be replaced, the oil drain valve 225 can be opened to drain the old oil. The integrated oil station 201 further includes an oil supply pump 210, an oil suction filter 211, an oil supply filter 212, an electro-hydraulic proportional valve 213, an oil supply temperature sensor 224, a fine filter 214, and a pressure transmitter 215. The oil supply pump 210 pumps lubricating oil from the oil storage container 202, the lubricating oil firstly passes through the oil absorption filter 211 and then enters the oil supply pump 210, and the lubricating oil output from the oil supply pump 210 subsequently passes through the oil supply filter 212; the lubricating oil then flows through the electro-hydraulic proportional valve 213, the fine filter 214 and the pressure transmitter 215 in sequence and enters the bearing block 206. The electro-hydraulic proportional valve 213 is mainly used for controlling the hydraulic pressure and flow rate of the lubricating oil, the fine filter 214 is used for filtering the lubricating oil again before the lubricating oil enters the supporting seat 206, the pressure transmitter 215 is used for detecting the pressure of the lubricating oil before entering the supporting seat 206, and the detected pressure value can be used for controlling the opening degree of the electro-hydraulic proportional valve 213. The fuel supply temperature sensor 224 is used to detect the actual fuel supply temperature.

The oil system further comprises a scavenge pump 216, the scavenge pump 216 being arranged on the scavenge line 204, the scavenge pump 216 being arranged to drive the flow of oil along the scavenge line 204 to the oil reservoir 202, one scavenge pump 216 for each valve block 205. Referring to fig. 7, the scavenge pump 216 may be specifically mounted to a base 701 of the test section 101, and a portion of scavenge line 204 may also be mounted to the base 701. Compared with the spontaneous flow of the lubricating oil, the oil return pump 216 can prevent the lubricating oil from returning normally. The oil system further comprises a return oil cooler 219 and a return oil filter 220, wherein the oil flowing out from the return oil pump 216 flows back to the oil storage container 202 along the return oil line 204, and the oil flows through the return oil cooler 219 and the return oil filter 220 in sequence during the return oil process; the oil return cooler 219 is used to cool the returned oil to prevent the oil from being overheated and the oil return filter 220 is used to filter the returned oil. The return oil cooler 219 may specifically be a plate heat exchanger, a tube heat exchanger, or the like, and the cooling medium may be water. The return oil line 204 is further provided with a return oil temperature sensor 218 for measuring the temperature of the returned lubricant oil, and the power of the return oil cooler 219 can be adjusted by comparing the temperature value detected by the return oil temperature sensor 218 with a target cooling temperature value of the lubricant oil.

In some embodiments, the oil system further includes an overflow line 217 and an overflow valve 221, two ends of the overflow line 217 are respectively connected to the oil supply line 203 and the oil return line 204, and the overflow valve 221 for controlling on/off of the overflow line 217 is disposed on the overflow line 217. An overflow pressure gauge 222 is arranged at the joint of the overflow pipeline 217 and the oil supply pipeline 203, when the pressure value measured by the overflow pressure gauge 222 is higher than a preset value, the overflow valve 221 is opened, part of the lubricating oil flows to the oil return pipeline 204 along the overflow pipeline 217, and then flows back to the oil storage container 202 from the oil return pipeline 204; after part of the lubricating oil is branched along the overflow pipeline 217, the pressure and the flow of the lubricating oil flowing to the supporting seat 206 are reduced, so that the lubricating oil provided for the supporting seat 206 is prevented from being too high in pressure or too high in flow.

The utility model also provides an engine test device, this engine test device include above-mentioned embodiment the lubricating oil system, this engine test device is difficult for appearing the oil return difficulty, and the oil return is efficient, and the fault rate is lower. Specifically, referring to fig. 1, the engine testing apparatus includes an oil lubrication system, a turntable 102, and a testing section 101, wherein a rotor test piece 703 to be tested (i.e., a part to be tested of an engine) is mounted on the testing section 101, the testing section 101 is mounted on the turntable 102 rotatable along multiple axes, the oil lubrication system is connected to the testing section 101, and the oil lubrication system is configured to supply lubricating oil to the testing section 101. The engine test device further comprises a measurement and control system, a water cooling system, an air system and a video monitoring system. The water cooling system is used for cooling the high-speed driving motor on the test section 101, the air system is used for providing compressed air for the engine or engine parts to be tested for sealing, and the video monitoring system is used for monitoring the real-time condition of the test. And the measurement and control system is used for controlling the operation of the lubricating oil system, the water cooling system, the air system, the test section and the rotary table.

In some embodiments, the engine test apparatus includes a plurality of valve blocks 205, the plurality of valve blocks 205 being distributed along a circumference of the support block 206. Taking fig. 9 as an example, 3 valve blocks 205 are provided on a single supporting seat 206 (i.e. there are 6 oil return valves 901), which is advantageous for the effective oil return of the oil system when the supporting seat 206 is in a more complex inclined state.

When the scavenge pump 216 is provided, if the scavenge pump 216 is continuously operated and the lubricating oil continuously flows out of the oil collection chamber 1001, the air pressure in the oil collection chamber 1001 is too low, and if the air pressure in the oil collection chamber 1001 is too low, the oil collection is difficult to return. To solve this problem, in some embodiments, the engine test apparatus includes an air pressure balance valve 902, an output end of the air pressure balance valve 902 is connected to the support base 206, an input end of the air pressure balance valve 902 is exposed to the atmosphere, an inner cavity of the air pressure balance valve 902 can communicate with the oil collecting cavity 1001, when the air pressure in the oil collecting cavity 1001 is too small, the air pressure balance valve 902 is opened, and air can enter the oil collecting cavity 1001 through the air pressure balance valve 902, so that the air pressure in the oil collecting cavity 1001 is compensated. The air pressure balancing valve 902 in this way is simple and reliable, and does not need an air pressure sensor and a complex air pressure compensation control system in an engine test device.

Specifically, referring to fig. 9, 10 and 12, the air pressure balance valve 902 includes a second valve body 1201, a second valve spool 1202 and an elastic member 1203, the second valve spool 1202 and the elastic member 1203 are both mounted in the second valve body 1201, and the second valve spool 1202 is movable relative to the second valve body 1201. The second valve body 1201 comprises a gas sealing portion 1204 and a limiting portion 1205, the gas sealing portion 1204 and the limiting portion 1205 are both located inside the second valve body 1201, a gas passing hole 1206 is formed in the center of the gas sealing portion 1204, two ends of the elastic member 1203 respectively abut against the second valve core 1202 and the limiting portion 1205, under the elastic force action of the elastic member 1203, the end portion of the second valve core 1202 and the gas sealing portion 1204 keep abutting states, the gas passing hole 1206 is in a closed state, and air cannot pass through the air pressure balance valve 902. When the air pressure in the oil collecting cavity 1001 is reduced to a certain degree, the external atmospheric pressure is higher than the air pressure in the oil collecting cavity 1001, the elastic member 1203 is compressed, the second valve spool 1202 moves towards the output end of the air pressure balance valve 902 under the action of the pressure difference, the end part of the second valve spool 1202 and the air sealing part 1204 are in a separated state at the moment, and air can pass through the air passing hole 1206. The second valve spool 1202 is also hollow, and an air pressure balance hole 1207 is formed in a side wall of the second valve spool 1202, so that air passing through the air passing hole 1206 can enter the inside of the second valve spool 1202 from the air pressure balance hole 1207, and the air entering the inside of the second valve spool 1202 can then directly flow into the oil collecting cavity 1001 from the output end of the air pressure balance valve 902. After the air pressure value of the oil collecting cavity 1001 returns to the normal range, the elastic member 1203 returns to the original length and pushes the second valve spool 1202 to move until the end of the second valve spool 1202 abuts against the air sealing portion 1204, and when the end of the second valve spool 1202 abuts against the air sealing portion 1204, the air pressure balance valve 902 is closed.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Lubricating oil system for providing lubricating oil for the test section, characterized by comprising:

an oil storage container capable of storing the lubricating oil;

the two ends of the oil supply pipeline are respectively connected with the oil storage container and the test section;

the oil return pipeline is connected with the oil storage container;

the valve bank comprises two oil return valves, the output ends of the oil return valves are connected with one ends, far away from the oil storage container, of the oil return pipelines, the input ends of the oil return valves are connected with the test section, the input ends of the oil return valves are arranged oppositely, each oil return valve comprises a first valve body and a first valve core, the first valve core is installed inside the first valve body, and the first valve core can move inside the first valve body under the action of self gravity, so that the oil return valves are opened or closed.

2. The lubricating oil system of claim 1, wherein the first valve body and the first valve spool are both hollow, the first valve body includes an oil seal portion, the oil seal portion is disposed inside the first valve body, the oil seal portion is connected to a side wall of the first valve body, the oil seal portion is provided with an oil passing hole through which the lubricating oil can pass, a valve oil return hole through which the lubricating oil can pass is formed in a side wall of the first valve spool, and an end portion of the first valve spool can abut against the oil seal portion to close the oil passing hole.

3. The lubrication system according to claim 1, wherein the lubrication system comprises a bearing oil supply nozzle and a damper oil supply nozzle, the bearing oil supply nozzle and the damper oil supply nozzle are both connected to one end of the oil supply pipeline away from the oil storage container, and the bearing oil supply nozzle and the damper oil supply nozzle are both embedded in the test section.

4. The oil system of claim 1, further comprising a scavenge pump disposed on the scavenge line for driving the flow of lubricant along the scavenge line into the reservoir.

5. The lubricating oil system of claim 1, further comprising an overflow pipeline and an overflow valve, wherein two ends of the overflow pipeline are respectively connected to the oil supply pipeline and the oil return pipeline, the overflow valve is disposed on the overflow pipeline, and the overflow valve is used for controlling on/off of the overflow pipeline.

6. The oil system according to any one of claims 1 to 5, further comprising a return oil cooler provided on the return oil line, the return oil cooler being capable of cooling the lubricating oil in the return oil line.

7. Engine testing device, characterized in that it comprises an oil system according to any one of claims 1 to 6.

8. The engine test device according to claim 7, wherein the engine test device comprises a supporting seat and a pressure balance valve, an oil collecting cavity capable of containing the lubricating oil is formed in the supporting seat, the output end of the pressure balance valve and the input end of the oil return valve are connected with the supporting seat, and the pressure difference between the input end and the output end of the pressure balance valve can enable the pressure balance valve to be opened or closed.

9. The engine test device according to claim 8, wherein the air pressure balance valve includes a second valve core, a second valve body and an elastic member, the second valve body and the second valve core are both hollow, the second valve core and the elastic member are both disposed inside the second valve body, the second valve core includes an air sealing portion, the air sealing portion is disposed inside the second valve body and connected to a side wall of the second valve body, the air sealing portion is provided with an air passing hole, an air pressure balance hole is provided on a side wall of the second valve core, and the elastic member can enable an end portion of the second valve core and the air sealing portion to be kept in a butting state to seal the air passing hole.

10. The engine testing device of claim 7, comprising a plurality of valve banks, wherein the plurality of valve banks are connected to the support base and are distributed along the circumference of the support base.

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