A bearing housing assembly and an aeroengine test apparatus

Abstract

This invention discloses a bearing housing assembly and an aero-engine testing device. The bearing housing assembly includes a bearing housing and a sealing ring. The bearing housing has a cavity, an oil passage, and an air passage. The oil passage includes an oil supply branch and an oil return branch. The oil inlet of the oil supply branch is connected to an oil supply connector, and the oil outlet of the oil supply branch forms at least three oil spray nozzles, which are arranged at intervals along the axial direction of the bearing housing. The oil inlet of the oil return branch is connected to the cavity, and the oil outlet of the oil return branch is connected to a oil return connector. The air inlet of the air passage is connected to an air supply connector. The sealing ring has an inner cavity and an air jet port connected to the inner cavity. The air jet port is connected to the air outlet of the air passage. This invention achieves multi-point lubrication of the oil passage. Oil spray nozzles at different positions and angles can be set as needed, and a squeezed oil film can be formed, achieving sufficient lubrication of high-speed bearings with good lubrication and heat dissipation effects. The internal air passage can provide pressurized gas for dynamic sealing and bearing preload.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular to a bearing housing assembly and aero-engine testing equipment. Background Technology

[0002] The development of aero-engines involves various ground-based tests and verifications, which are inseparable from the construction and technological advancement of testing equipment. As aero-engine accessory transmission systems continue to evolve towards high-speed, miniaturized, and integrated designs, the rotational speeds of testing equipment are increasing, placing higher demands on the installation, lubrication, loading, support, and power input of simulated test specimens on ground-based testing equipment. The design of bearing housing assemblies must ensure the support rigidity of the high-speed shaft and reliable lubrication of the bearings, preventing phenomena such as excessive bearing temperature rise and high vibration.

[0003] The bearing housing assembly of existing testing equipment usually adopts jet lubrication. The pre-machined nozzle assembly is installed on the bearing housing. The installation layout, such as the number and position of the nozzles, is easily restricted by the structure, which affects the lubrication effect. Summary of the Invention

[0004] The main objective of this invention is to provide a bearing housing assembly and an aero-engine testing device, which aims to achieve multi-point lubrication of the oil circuit of the bearing housing assembly to improve the lubrication effect.

[0005] To achieve the above objectives, the present invention provides a bearing housing assembly for supporting a high-speed rotating drive shaft, the bearing housing assembly comprising:

[0006] The bearing housing is provided with a cavity, an oil passage, and an air passage. The oil passage includes an oil supply branch and an oil return branch. The oil supply branch has an inlet end connected to an oil supply connector and an outlet end forming at least three oil spray nozzles. The at least three oil spray nozzles are arranged at intervals along the axial direction of the bearing housing and are respectively connected to the cavity. The oil return branch has an inlet end connected to the cavity and an outlet end connected to an oil return connector. The air passage has an inlet end connected to an air supply connector.

[0007] The oil supply connector, the oil return connector, and the air supply connector are respectively installed on the bearing housing; and

[0008] A sealing ring is installed on the bearing housing. The sealing ring has an inner cavity and an air jet port communicating with the inner cavity. The air jet port is connected to the air outlet of the air passage.

[0009] Optionally, the oil supply branch includes a first oil supply channel, a second oil supply channel, and a third oil supply channel that are sequentially connected from its oil inlet end to its oil outlet end. The first oil supply channel is inclined, the second oil supply channel extends axially along the bearing housing, and the third oil supply channel extends radially along the bearing housing. The centerline of the first oil supply channel and the centerline of the second oil supply channel form a first angle with the opening facing away from the sealing ring, and the first angle is an acute angle.

[0010] Optionally, an oil injection port located near the sealing ring inside the bearing housing is connected to the third oil supply channel and is inclined, and the center line of the oil injection port and the center line of the third oil supply channel form a second included angle with the opening facing the second oil supply channel, the second included angle being an obtuse angle.

[0011] Optionally, all the fuel injectors are cylindrical and have a diameter of 0.5 to 1.2 mm.

[0012] Optionally, the oil return branch includes an oil return channel, an oil return chamber, and an oil return port connected in sequence, and the oil return chamber is connected to the cavity;

[0013] The oil return channel is inclined, and the center line of the oil return channel and the center line of the bearing housing form a third included angle with the opening facing away from the sealing ring, and the third included angle is an acute angle.

[0014] Optionally, the oil return port is inclined, and the center line of the oil return port and the center line of the bearing housing form a fourth included angle with the opening facing away from the sealing ring, and the fourth included angle is an acute angle.

[0015] Optionally, the oil passage has a machined process hole end, and the bearing housing assembly further includes a sealing element that is detachably and sealingly disposed on the process hole end of the oil passage.

[0016] Optionally, the mounting end face between the bearing housing and the sealing ring is sealed by a sealing ring and fixed by bolts.

[0017] Optionally, the sealing ring and the bearing housing are positioned axially by a shoulder and radially by a clearance fit, wherein the clearance is less than 0.05 mm.

[0018] To achieve the above objectives, the present invention also proposes an aero-engine testing device, comprising the bearing housing assembly as described above, wherein the bearing housing assembly includes:

[0019] The bearing housing is provided with a cavity, an oil passage, and an air passage. The oil passage includes an oil supply branch and an oil return branch. The oil supply branch has an inlet end connected to an oil supply connector and an outlet end forming at least three oil spray nozzles. The at least three oil spray nozzles are arranged at intervals along the axial direction of the bearing housing and are respectively connected to the cavity. The oil return branch has an inlet end connected to the cavity and an outlet end connected to an oil return connector. The air passage has an inlet end connected to an air supply connector.

[0020] The oil supply connector, the oil return connector, and the air supply connector are respectively installed on the bearing housing; and

[0021] A sealing ring is installed on the bearing housing. The sealing ring has an inner cavity and an air jet port communicating with the inner cavity. The air jet port is connected to the air outlet of the air passage.

[0022] In the technical solution of the present invention, the bearing housing assembly includes a bearing housing and a sealing ring; the bearing housing is provided with a cavity, an oil passage, and an air passage; the oil passage includes an oil supply branch and an oil return branch, the oil inlet end of the oil supply branch is connected to an oil supply connector, the oil outlet end of the oil supply branch forms at least three oil spray nozzles, the at least three oil spray nozzles are arranged at intervals along the axial direction of the bearing housing and are respectively connected to the cavity, the oil inlet end of the oil return branch is connected to the cavity, and the oil outlet end of the oil return branch is connected to the oil return connector; the air inlet end of the air passage is connected to the air supply connector; wherein, the oil supply connector, the oil return connector, and the air supply connector are respectively installed on the bearing housing; the sealing ring is covered on the bearing housing, the sealing ring is provided with an inner cavity and an air jet port connected to the inner cavity, and the air jet port is connected to the air outlet end of the air passage.

[0023] It is understood that the bearing housing design of this invention has multiple internal oil passages, and multi-point lubrication of the bearing is achieved through nozzles at different positions, forming an oil film between the spring bearing and the bearing housing, which greatly improves the lubrication and heat dissipation effects.

[0024] Furthermore, the bearing housing is designed with an internal air passage, and the sealing ring is bolted to the bearing housing. The air passage is connected to the nozzle of the sealing ring, providing the sealing or bearing preload pressure gas to the inner cavity of the sealing ring.

[0025] The bearing housing assembly of the present invention adopts internal oil and air passages, and directly processes oil and air nozzles on the bearing housing, eliminating the need for nozzle installation, reducing operation steps, and improving assembly convenience; the use of internal pipelines saves space, reduces the risk of sealing leakage between the nozzle and the bearing housing, and enables multi-point and multi-angle lubrication, improving the lubrication and heat dissipation effect of the bearing.

[0026] In addition, the bearing housing has connectors for oil and air passages, respectively, to connect the oil supply and return lines and the air supply line. The oil supply port can be located at a high position, and the return oil from multiple oil injection ports gathers in a return oil chamber located at the bottom. The angle of the return oil port and the size of the return oil chamber are designed to ensure smooth oil return and prevent oil accumulation. The process holes machined in the oil passages are equipped with removable plugs or end caps with seals to effectively prevent lubricating oil leakage. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the bearing housing assembly of the present invention;

[0029] Figure 2 for Figure 1 Sectional view at point AA;

[0030] Figure 3 for Figure 1 Rotated sectional view at point BB;

[0031] Figure 4 for Figure 2 Sectional view at EE;

[0032] Figure 5 for Figure 2 Sectional view at FF;

[0033] Figure 6 for Figure 2 Sectional view at SS.

[0034] Explanation of icon numbers:

[0035] 10. Bearing housing; 20. Sealing ring; 31. Oil supply connector; 32. Oil return connector; 33. Air supply connector; 10a. Cavity; 10b. Oil passage; 10c. Air passage; 10b1. Oil supply branch; 10b2. Oil return branch; 101a. Oil nozzle; 20a. Inner cavity; 20b. Air nozzle; 10b11. First oil supply channel; 10b12. Second oil supply channel; 10b13. Third oil supply channel; α. First included angle; β. Second included angle; γ. Third included angle; δ. Fourth included angle; 10b21. Oil return channel; 10b22. Oil return chamber; 10b23. Oil return port; 41. Sealing component; 51. Bolt; 52. Washer; 61. Sealing ring; 62. Radial sealing ring.

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] This invention proposes a bearing housing assembly for supporting a high-speed rotating drive shaft, which can be applied to devices or equipment that require the installation of a bearing housing assembly, especially aero-engine test equipment, but is not limited thereto.

[0041] Reference Figures 1 to 3In one embodiment of the present invention, the bearing housing assembly includes a bearing housing 10 and a sealing ring 20; the bearing housing 10 is provided with a cavity 10a, an oil passage 10b and an air passage 10c; the oil passage 10b includes an oil supply branch 10b1 and an oil return branch 10b2, the oil inlet end of the oil supply branch 10b1 is connected to an oil supply connector 31, and the oil outlet end of the oil supply branch 10b1 forms at least three oil spray ports 101a, the at least three oil spray ports 101a are arranged at intervals along the axial direction of the bearing housing 10 and are respectively connected to the cavity 10a, the oil inlet end of the oil return branch 10b2 is connected to the cavity 10a, and the oil outlet end of the oil return branch 10b2 is connected to the oil return connector 32; the air inlet end of the air passage 10c is connected to the air supply connector 33. Among them, the oil supply connector 31, the oil return connector 32 and the air supply connector 33 are respectively installed on the bearing housing 10; the sealing ring 20 is covered on the bearing housing 10, and the sealing ring 20 has an inner cavity 20a and an air jet 20b communicating with the inner cavity 20a. The air jet 20b is connected to the air outlet end of the air passage 10c.

[0042] In this embodiment, the bearing housing 10 is a casting with a complex cavity 10a, internal oil passage 10b, and air passage 10c. The oil supply branch 10b1 can be set at the high point of the bearing housing 10, and the oil return branch 10b2 is at the bottom of the bearing housing 10. The three oil spray nozzles 101a can be cylindrical or conical, etc., and different shapes and different spray angles of oil spray nozzles 101a can also be set according to lubrication requirements. No specific limitation is made here.

[0043] like Figure 5 and Figure 6 The cavity 10a of the bearing housing 10 can be set according to the specifications of the drive shaft and the requirements for lubrication and heat dissipation, and no specific limitation is made here.

[0044] Main reference Figure 2 The mounting surfaces between the bearing housing 10 and the sealing ring 20 can be sealed by a sealing ring 61 and connected together by bolts 51. A washer 52 can be placed between the bolts 51 and the sealing ring 20. In this way, the pressure chamber formed by the sealing ring 20 and the high-speed drive shaft can achieve a dynamic seal, effectively preventing lubricating oil from flowing towards the sealing ring 20. Furthermore, the sealing ring 20 and the bearing housing 10 can be positioned axially by a shoulder, and radially by a clearance fit, with a maximum clearance of 0.05 mm, to prevent oil leakage.

[0045] In the technical solution of the present invention, the bearing housing assembly includes a bearing housing 10 and a sealing ring 20; the bearing housing 10 is provided with a cavity 10a, an oil passage 10b, and an air passage 10c; the oil passage 10b includes an oil supply branch 10b1 and an oil return branch 10b2, the oil inlet end of the oil supply branch 10b1 is connected to the oil supply connector 31, and the oil outlet end of the oil supply branch 10b1 forms at least three oil spray nozzles 101a, the at least three oil spray nozzles 101a are arranged at intervals along the axial direction of the bearing housing 10 and are respectively connected to the cavity 10a. The oil return branch 10b2 is connected to the cavity 10a at its inlet end and to the oil return connector 32 at its outlet end. The air inlet of the air passage 10c is connected to the air supply connector 33. The oil supply connector 31, the oil return connector 32, and the air supply connector 33 are respectively installed on the bearing housing 10. A sealing ring 20 is installed on the bearing housing 10. The sealing ring 20 has an inner cavity 20a and an air jet 20b connected to the inner cavity 20a. The air jet 20b is connected to the outlet end of the air passage 10c. It can be understood that the bearing housing 10 of the present invention is designed with multiple internal oil passages 10b. Through the nozzles at different positions, multi-point lubrication of the bearing is achieved, forming an oil film between the spring bearing and the bearing housing 10, which greatly improves the lubrication and heat dissipation effects. Furthermore, the bearing housing 10 is designed with an internal air passage 10c. The sealing ring 20 is connected to the bearing housing 10 by bolts 51. The air passage 10c communicates with the nozzle of the sealing ring 20, providing pressurized gas for sealing or bearing preload to the inner cavity 20a of the sealing ring 20. In addition, the bearing housing 10 is provided with connectors for the oil passage 10b and the air passage 10c, respectively, for connecting the oil supply and return lines and the air supply line. The oil supply port can be located at a high position, and the return oil from multiple oil spray ports 101a is collected in a return oil chamber 10b22 located at the bottom. The angle of the return oil port 10b23 and the size of the return oil chamber 10b22 are designed to ensure smooth oil return and avoid oil accumulation. The process hole end of the oil passage 10b is equipped with a removable plug or end cap with a seal, which can effectively prevent lubricating oil leakage.

[0046] Compared with the prior art, the bearing housing assembly of the present invention adopts an internal oil passage 10b and an air passage 10c, and directly processes the oil injection port 101a and air injection port 20b on the bearing housing 10, eliminating the need to install nozzles, reducing operation steps, and improving assembly convenience; the use of internal pipelines saves space, reduces the risk of sealing leakage between the nozzle and the bearing housing 10, and enables multi-point and multi-angle lubrication, improving the lubrication and heat dissipation effect of the bearing.

[0047] To improve fuel supply efficiency, in one embodiment, the main reference is... Figure 2 and Figure 3The oil supply branch 10b1 may include a first oil supply channel 10b11, a second oil supply channel 10b12, and a third oil supply channel 10b13 connected sequentially from its oil inlet end to its oil outlet end. The first oil supply channel 10b11 may be inclined, the second oil supply channel 10b12 extends axially along the bearing housing 10, and the third oil supply channel 10b13 extends radially along the bearing housing 10. The centerline of the first oil supply channel 10b11 and the centerline of the second oil supply channel 10b12 form a first included angle α between the opening and the sealing ring 20. Figure 2 and Figure 3 As shown, the first included angle α is an acute angle. By setting the inclined first oil supply channel 10b11, the flow rate of the oil can be effectively increased, the oil supply and lubrication can be accelerated, and continuous lubrication and heat dissipation can be ensured.

[0048] Combination Figure 2 and Figure 3 In this embodiment, an oil injection port 101a (i.e., an oil injection port 101a located at the bottom of the bearing housing 10) is provided inside the bearing housing 10 near the sealing ring 20 and is connected to the third oil supply channel 10b13 and is inclined. The center line of the oil injection port 101a and the center line of the third oil supply channel 10b13 form a second included angle β with the opening facing the second oil supply channel 10b12. The second included angle β is an obtuse angle. The size of the second included angle β is preferably 120°, but is not limited here.

[0049] By providing the oil injection port 101a with the above-described structure, the present invention can spray lubricating oil to the assembly point of the high-speed rotating drive shaft and bearing, which greatly improves the lubrication and heat dissipation effect.

[0050] In this embodiment, the oil injection nozzles 101a can all be cylindrical, and their diameters are all 0.5 to 1.2 mm, so as to facilitate processing while ensuring better lubrication effect.

[0051] Similarly, the oil spray nozzle 101a located at the top of the bearing housing 10 can be tilted downwards to spray lubricating oil onto the assembly point of the drive shaft and the bearing, thereby further improving lubrication and heat dissipation. The oil spray direction of the oil spray nozzles 101a located at other positions in the bearing housing 10 can be directed towards the assembly point of the drive shaft and the bearing to ensure good lubrication and heat dissipation.

[0052] To improve oil return efficiency, in one embodiment, the main reference is... Figure 2The oil return branch 10b2 may include an oil return channel 10b21, an oil return chamber 10b22, and an oil return port 10b23 connected in sequence. The oil return chamber 10b22 is connected to the cavity 10a. The oil return channel 10b21 may be inclined, and the centerline of the oil return channel 10b21 and the centerline of the bearing housing 10 form a third included angle γ with the opening facing away from the sealing ring 20. The third included angle γ is an acute angle. By setting the inclined oil return channel 10b21, the oil return speed can be effectively increased, the lubricating oil circulation supply can be accelerated, thereby improving the lubrication and heat dissipation effects.

[0053] The size of the third included angle γ is preferably 50°, but is not limited here.

[0054] To further improve the oil return efficiency, in this embodiment, the oil return port 10b23 can also be inclined, and the center line of the oil return port 10b23 and the center line of the bearing housing 10 form a fourth included angle δ with the opening facing away from the sealing ring 20, and the fourth included angle δ is an acute angle. Preferably, the fourth included angle δ is an acute angle of not less than 45°, that is, the angle between the center line of the oil return port 10b23 and the horizontal line is not less than 45°, but this is not limited here.

[0055] In this embodiment, the return oil from multiple oil injection ports 101a is collected in a return oil cavity 10b22 located at the bottom. The angle of the return oil port 10b23 and the size of the return oil cavity 10b22 are set to ensure smooth return oil flow and avoid oil accumulation.

[0056] To improve the sealing performance of the bearing housing assembly and prevent lubricating oil leakage, in one embodiment, the oil passage 10b has a machined process hole end, and the bearing housing assembly also includes a sealing member 41, which is detachably and sealingly disposed on the process hole end of the oil passage 10b.

[0057] In this embodiment, the sealing component 41 can be an end cap or a plug, etc., and is not limited here.

[0058] The present invention also proposes an aero-engine testing device, which includes a bearing housing assembly. The specific structure of the bearing housing assembly is as described in the above embodiments. Since the aero-engine testing device proposed in this invention includes all schemes of all embodiments of the above-described bearing housing assembly, it has at least the same technical effects as the above-described bearing housing assembly, which will not be described in detail here.

[0059] It is worth mentioning that this invention has been successfully applied to a number of tests, including vibration scanning tests, endurance testing, and dynamic stress tests, of the accessory transmission system of a certain type of aircraft engine. The total testing time reached 600 hours, the entire testing equipment operated well, and the tests were successfully completed.

[0060] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An aircraft engine testing device, characterized in that, include: The bearing housing is provided with a cavity, an oil passage, and an air passage. The oil passage includes an oil supply branch and an oil return branch. The oil supply branch has an inlet end connected to an oil supply connector and an outlet end forming at least three oil spray nozzles. The at least three oil spray nozzles are arranged at intervals along the axial direction of the bearing housing and are respectively connected to the cavity. The oil return branch has an inlet end connected to the cavity and an outlet end connected to an oil return connector. The air passage has an inlet end connected to an air supply connector. The oil supply connector, the oil return connector, and the air supply connector are respectively installed on the bearing housing; and A sealing ring is installed on the bearing housing. The sealing ring has an inner cavity and an air jet port communicating with the inner cavity. The air jet port is connected to the air outlet of the air passage. The oil supply branch includes a first oil supply channel, a second oil supply channel, and a third oil supply channel connected sequentially from its oil inlet end to its oil outlet end. The first oil supply channel is inclined, the second oil supply channel extends axially along the bearing housing, and the third oil supply channel extends radially along the bearing housing. The centerline of the first oil supply channel and the centerline of the second oil supply channel form a first angle with the opening facing away from the sealing ring, and the first angle is an acute angle. At least three oil injection ports are used to form an oil film between the bearing housing and the spring bearing. One oil injection port located inside the bearing housing near the sealing ring is connected to the third oil supply channel and is inclined. The centerline of the oil injection port and the centerline of the third oil supply channel form a second angle with the opening facing the second oil supply channel, and the second angle is an obtuse angle.

2. The aero-engine testing equipment as described in claim 1, characterized in that, All the fuel injectors are cylindrical and have a diameter of 0.5~1.2mm.

3. The aero-engine testing equipment as described in claim 1, characterized in that, The oil return branch includes an oil return channel, an oil return chamber, and an oil return port connected in sequence, and the oil return chamber is connected to the cavity. The oil return channel is inclined, and the center line of the oil return channel and the center line of the bearing housing form a third included angle with the opening facing away from the sealing ring, and the third included angle is an acute angle.

4. The aero-engine testing equipment as described in claim 3, characterized in that, The oil return port is inclined, and the center line of the oil return port and the center line of the bearing housing form a fourth included angle with the opening facing away from the sealing ring, and the fourth included angle is an acute angle.

5. The aero-engine testing equipment as described in claim 1, characterized in that, The oil passage has a process hole end formed by machining, and the aero-engine test equipment also includes a sealing component, which is detachably and sealingly disposed on the process hole end of the oil passage.

6. The aero-engine testing equipment as described in claim 1, characterized in that, The mounting end face between the bearing housing and the sealing ring is sealed by a sealing ring and fixed by bolts.

7. The aero-engine testing equipment as described in claim 6, characterized in that, The sealing ring and the bearing housing are positioned axially by a shoulder and radially by a clearance fit, with the clearance being less than 0.05 mm.

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