Centrifugal acceleration test device for hydraulic pump in working state

Abstract

The invention discloses a centrifugal acceleration test device for a hydraulic pump in a working state, and relates to the technical field of aero-engine tests. According to the device, a set of rotary oil supply device arranged on an acceleration rotary arm is designed, and a driving rotating speed and a hydraulic environment are provided for a tested pump so as to realize a working state acceleration test of fuel pump products. By designing a set of special installation platform, rotation speed transmission and multi-direction acceleration test are realized. The test system has the advantages of low cost, high modularization degree and strong universality. Working state acceleration tests corresponding to different types of products can be rapidly completed by replacing corresponding installation clamps.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine testing, and in particular relates to a centrifugal acceleration testing device under a hydraulic pump working state. Background Art

[0002] During the development process of aircraft engine fuel pumps, acceleration tests need to be carried out to simulate the corresponding engine working conditions during flight and verify its reliability under acceleration conditions. Fuel pump acceleration tests are divided into two types: working state and non-working state. The working state centrifugal acceleration test refers to the fuel pump being installed on the rotating arm of the centrifugal acceleration test bench under specific or all working conditions. After the acceleration test bench rotating arm is started, it rotates to provide acceleration to test the reliability and performance data of the tested fuel pump. Since the tested fuel pump needs a hydraulic motor to provide speed when working, and needs to be equipped with a complete fuel system to supply fuel to the rotating fuel pump, the working state acceleration test has a higher risk and the acceleration test bench rotating arm has a larger load-bearing capacity. At present, there are only non-working state acceleration test equipment in the industry, and there is no working state fuel pump acceleration test equipment, nor is there an acceleration test method based on the working state. Summary of the invention

[0003] Based on the above background, a rotating oil supply device for supplying fuel to a rotating acceleration test bench is provided to achieve uninterrupted fuel supply to a tested fuel pump and a hydraulic motor.

[0004] In view of this, according to one aspect of an embodiment of the present invention, a centrifugal acceleration test device under a hydraulic pump working state is provided, comprising: a rotating oil supply device 1, a fixed end hydraulic motor fuel pipeline 2, a fixed rotary test hydraulic pump fuel pipeline 3, a rotating end hydraulic motor fuel pipeline 4, a rotating end test hydraulic pump fuel pipeline 5, an installation platform 6, an acceleration test bench swing arm 101 and a swing arm rotating shaft 102; wherein, the acceleration test bench swing arm 101 is installed in the middle of the swing arm rotating shaft 102, and both ends of the acceleration test bench swing arm 101 rotate around the swing arm rotating shaft 102, the fixed end hydraulic motor fuel pipeline 2 and the fixed rotary test hydraulic pump fuel pipeline 3 are connected with the rotating oil supply device 1, and the rotating oil supply device 1 is installed on the acceleration test bench swing arm 101, and is respectively connected with the rotating end hydraulic motor fuel pipeline 4 and the rotating end test hydraulic pump fuel pipeline 5, so as to provide fuel for the test hydraulic pump and hydraulic motor on the swing arm; the installation platform 6 is arranged at the end of the acceleration test bench swing arm 101, and is used to install the test hydraulic pump and the hydraulic motor providing the rotation speed.

[0005] Optionally, the rotary oil supply device 1 also includes a rotary joint 7, a rotary joint bracket 8, and a bracket mounting plate 11, wherein the rotary joint 7 is used to connect the fixed-end hydraulic motor fuel pipeline 2 and the rotating-end hydraulic motor fuel pipeline 4, the fixed rotary test hydraulic pump fuel pipeline 3 and the rotating-end test hydraulic pump fuel pipeline 5, the rotary joint 7 is installed on the rotary joint bracket 8, and the rotary joint bracket 8 is installed on the acceleration test bench arm 101 through the bracket mounting plate 11, and the center of the rotary joint 7 is coaxial with the arm rotation axis 102.

[0006] Optionally, the rotary joint 7 is a cylinder, divided into a stator side and a rotor side, the stator side is fixed, connected to the fixed end hydraulic motor fuel pipeline 2, and the fixed rotating test hydraulic pump fuel pipeline 3, the rotor side rotates with the acceleration test bench arm 101, and the end of the rotor side has a fuel hole, a rotating end hydraulic motor fuel pipeline 4, and a rotating end test hydraulic pump fuel pipeline 5.

[0007] Optionally, the rotary joint bracket 8 includes support legs 81 and a hollow tray 82, the bottom of which is suspended for installing the rotary end hydraulic motor fuel pipeline 4 and the rotary end test hydraulic pump fuel pipeline 5, the support legs 81 and the hollow tray 82 are connected by welding or bolts, and the hollow tray 82 is fixed to the rotary joint 7.

[0008] Optionally, the mounting platform 6 is a gear box or a bearing box, and through internal transmission, the hydraulic motor installed thereon provides speed transmission for the tested hydraulic pump.

[0009] Optionally, the mounting platform 6 has the functions of speed measurement and speed regulation.

[0010] Optionally, when the mounting platform is a gear box, when the gear box is fixed, the acceleration test measurement in four directions can be achieved by rotating the mounting direction of the tested hydraulic pump.

[0011] Optionally, the gearbox is installed upside down, and the acceleration test in the remaining two directions is achieved by rotating the installation direction of the tested hydraulic pump.

[0012] The problem of being unable to conduct acceleration tests in the working state was solved by designing a rotating oil supply device system that connects the fixed pipeline of the hydraulic system and the rotating pipeline on the swing arm of the acceleration test bench. Provide various working conditions required for the tested fuel pump to realize the acceleration test of pump products in the working state. A special installation platform is used to realize the transmission conditions of the test piece. The designed acceleration test system can realize the acceleration test of pump products in the working state. With a special installation platform with adjustable installation direction, acceleration tests in six directions can be realized. Provide a test system for the acceleration performance of the fuel pump in the working state and the response of the fuel pump under maneuvering conditions when the engine is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the appearance diagram of the working acceleration test bench;

[0014] Figure 2 This is a schematic diagram of the structure of the working acceleration test bench;

[0015] Figure 3 This is the structural diagram of the rotary oil supply device;

[0016] Figure 4 It is a schematic diagram of a fixing bracket used for fixing a rotary joint in a rotary oil supply device;

[0017] Figure 5 , Figure 6 A schematic diagram of the installation platform.

[0018] Description of reference numerals:

[0019] 1 is a rotary oil supply device, 2 is a fixed end hydraulic motor fuel pipeline, 3 is a fixed rotary test hydraulic pump fuel pipeline, 4 is a rotary end hydraulic motor fuel pipeline, 5 is a rotary end test hydraulic pump fuel pipeline, 6 is a mounting platform, 7 is a rotary joint, 8 is a rotary joint bracket, 8 is a screw for fixing the rotary joint, 9 is a mounting plate screw, 11 is a bracket mounting plate, 12 is a screw connecting the mounting plate and the acceleration test bench swing arm, 101 is the acceleration test bench swing arm, 102 is the swing arm rotation axis, 81 is a support leg, and 82 is a hollow tray. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] According to one aspect of an embodiment of the present invention, a centrifugal acceleration test device for a hydraulic pump in a working state is provided, comprising: a rotating oil supply device 1, a fixed end hydraulic motor fuel pipeline 2, a fixed rotary test hydraulic pump fuel pipeline 3, a rotating end hydraulic motor fuel pipeline 4, a rotating end test hydraulic pump fuel pipeline 5, an installation platform 6, an acceleration test bench arm 101 and an arm rotation axis 102; wherein, the acceleration test bench arm 101 is installed in the middle of the arm rotation axis 102, and both ends of the acceleration test bench arm 101 rotate around the arm rotation axis 102, the fixed end hydraulic motor fuel pipeline 2 and the fixed rotary test hydraulic pump fuel pipeline 3 are connected to the rotating oil supply device 1, and the rotating oil supply device 1 is installed on the acceleration test bench arm 101, and is respectively connected to the rotating end hydraulic motor fuel pipeline 4 and the rotating end test hydraulic pump fuel pipeline 5, and is used to provide fuel for the test hydraulic pump and hydraulic motor on the arm; the installation platform 6 is arranged at the end of the acceleration test bench arm 101, and is used to install the test hydraulic pump and the hydraulic motor that provides the rotation speed.

[0022] Furthermore, the rotary oil supply device 1 also includes a rotary joint 7, a rotary joint bracket 8, and a bracket mounting plate 11, wherein the rotary joint 7 is used to connect the fixed-end hydraulic motor fuel pipeline 2 and the rotating-end hydraulic motor fuel pipeline 4, the fixed-rotating test hydraulic pump fuel pipeline 3 and the rotating-end test hydraulic pump fuel pipeline 5, the rotary joint 7 is installed on the rotary joint bracket 8, and the rotary joint bracket 8 is installed on the acceleration test bench arm 101 through the bracket mounting plate 11, and the center of the rotary joint 7 is coaxial with the arm rotation axis 102.

[0023] Furthermore, the rotary joint 7 is a cylinder, which is divided into a stator side and a rotor side. The stator side is fixed and connected to the fixed end hydraulic motor fuel pipeline 2 and the fixed rotating test hydraulic pump fuel pipeline 3. The rotor side rotates with the acceleration test bench arm 101. The end of the rotor side has a fuel hole, a rotating end hydraulic motor fuel pipeline 4, and a rotating end test hydraulic pump fuel pipeline 5.

[0024] Furthermore, the rotary joint bracket 8 includes support legs 81 and a hollow tray 82, the bottom of which is suspended for installing the rotary end hydraulic motor fuel pipeline 4 and the rotary end test hydraulic pump fuel pipeline 5, the support legs 81 and the hollow tray 82 are connected by welding or bolts, and the hollow tray 82 is fixed to the rotary joint 7.

[0025] Furthermore, the mounting platform 6 is a gear box or a bearing box, and through internal transmission, the hydraulic motor installed thereon provides speed transmission for the tested hydraulic pump.

[0026] Furthermore, the mounting platform 6 has the functions of rotating speed measurement and rotating speed regulation.

[0027] Furthermore, when the mounting platform is a gear box, when the gear box is fixed, the acceleration test measurement in four directions can be achieved by rotating the mounting direction of the tested hydraulic pump.

[0028] Furthermore, the gearbox is installed upside down, and the acceleration test in the remaining two directions is achieved by rotating the installation direction of the tested hydraulic pump.

[0029] Example

[0030] like Figure 1-6 As shown in the figure, from the working state acceleration test bench appearance ( Figure 1 ) and the schematic diagram of the working acceleration test bench ( Figure 2 ) can be seen that this test system consists of the tested hydraulic pump, the tested pump transmission system (hydraulic motor), the fuel pipeline of the tested product at the fixed end, the fuel pipeline of the hydraulic motor at the fixed end, the acceleration test bench swing arm, the swing arm rotating shaft, the rotating oil supply device, the fuel pipeline of the tested product at the rotating end, the fuel pipeline of the hydraulic motor at the rotating end, and the mounting platform.

[0031] The fixed end pipe 2 is connected to the hydraulic system of the tested product (tested hydraulic pump) and is responsible for providing a fuel environment for the tested hydraulic pump. The fixed end pipe 3 is connected to the hydraulic system of the hydraulic motor and is responsible for supplying fuel to the hydraulic motor that provides the speed of the tested hydraulic pump.

[0032] The fixed end pipelines 2 and 3 are connected to the hydraulic system of the tested hydraulic pump and the hydraulic system of the hydraulic motor to the rotary joint 1. The stator of the rotary joint does not participate in the rotation, so a hard pipe is used to connect it to the hydraulic system. The requirements can be met by fixing and modifying the hard pipe.

[0033] The rotating end pipes 4 and 5 are fixed to the acceleration test bench swing arm panel by pipe clamps. The hydraulic motor and the tested hydraulic pump are respectively connected to the rotary joint 7 to provide stable pressure and flow to meet the working state use requirements of the tested fuel pump. The pipeline adopts rubber hose, which can be quickly disassembled and modified. It can meet the modification requirements of fuel pump tests of different sizes and models. The rubber hose is fixed to the threaded hole of the swing arm panel by a pipe clamp to prevent the rubber hose from being disengaged during rotation and causing safety accidents. The rotor of the rotary joint rotates synchronously with the swing arm of the acceleration test bench to provide the hydraulic motor and the tested hydraulic pump with the fuel environment required for the test.

[0034] The rotary oil supply device of the present invention is shown in the structural diagram of the rotary oil supply device ( Figure 3 ) is used to provide stable fuel to the rotating hydraulic pump and hydraulic motor under test. The rotating oil supply device consists of a rotating joint, a rotating joint bracket, and screws.

[0035] 7 is a rotary joint, which is a cylinder and is divided into a stator side and a rotor side. The stator side is fixed and connected to the fixed end pipeline 2 and the fixed end pipeline 3. The rotor side rotates with the acceleration test bench swing arm. The end of the rotor has a fuel hole, which connects the rotating pipeline 4 and the rotating end pipeline 5. The rotor side has a screw hole for fixing, which can be connected to the special rotary joint bracket 8 through a special screw 9. The rotary joint 7 and the rotary joint bracket 8 need to be installed in the center of the acceleration swing arm. After the rotary joint 7 is installed, its center hole is required to remain coaxial with the swing arm rotation axis.

[0036] The appearance of the rotating joint bracket 8 is as follows Figure 4 As shown, the bottom is hollow and is used to install the rotating end pipeline. The four supporting legs are connected to the hollow tray by welding or bolts. There are threaded holes on the thin plate at the edge of the tray, which are fixed to the rotary joint 7 by screws 9. The bracket mounting plate 11 is a square metal plate with a regular array of threaded holes. The rotary joint bracket 8 is separated from the bracket mounting plate 11, and different rotary joints and brackets can be selected according to different types of test tasks. Different types of brackets are fixed on the same bracket mounting plate 11 by screws 10, which is conducive to rapid disassembly and modification, saving costs. The mounting plate 11 is connected to the acceleration test bench arm by screws 12, so the rotary joint bracket can connect and fix the rotor part of the rotary joint to the rotary arm of the acceleration test bench. The three rotate synchronously when the acceleration test bench is working. The bracket can also be made without relying on screws, but can be made by other connection methods such as welding and riveting according to the modification environment.

[0037] Installation platform such as Figure 5 , Figure 6 As shown, it is fixed on the acceleration arm through the screw mounting holes on the bottom or side. The mounting platform can be designed as a gear box, bearing box and other structures. Through internal transmission, the hydraulic motor installed on it can provide speed transmission for the test piece. It has the functions of speed measurement and speed regulation. When the mounting platform is a gear box, under the premise that the gear box is fixed, the acceleration test measurement in 4 directions can be achieved by rotating the installation direction of the test piece. The gear box is tilted to install, and the remaining 2 directions, a total of 6 directions, can be realized. Other structures such as bearing boxes need to have the function of multi-directional fixation with the arm to achieve acceleration testing of the test piece in 6 directions.

[0038] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A centrifugal acceleration test device for a hydraulic pump in working condition, characterized in that: include: A rotary oil supply device (1), a fixed end hydraulic motor fuel pipeline (2), a fixed rotary test hydraulic pump fuel pipeline (3), a rotary end hydraulic motor fuel pipeline (4), a rotary end test hydraulic pump fuel pipeline (5), a mounting platform (6), an acceleration test bench swing arm (101) and a swing arm rotation axis (102); wherein the acceleration test bench swing arm (101) is mounted in the middle of the swing arm rotation axis (102), both ends of the acceleration test bench swing arm (101) rotate around the swing arm rotation axis (102), and the fixed end hydraulic motor fuel pipeline (4), a rotary end test hydraulic pump fuel pipeline (5), a mounting platform (6), an acceleration test bench swing arm (101) and a swing arm rotation axis (102); wherein the acceleration test bench swing arm (101) is mounted in the middle of the swing arm rotation axis (102), and both ends of the acceleration test bench swing arm (101) rotate around the swing arm rotation axis (102). The hydraulic motor fuel pipeline (2) and the fixed rotary test hydraulic pump fuel pipeline (3) are connected to the rotary oil supply device (1); the rotary oil supply device (1) is installed on the acceleration test bench swing arm (101) and is respectively connected to the rotary end hydraulic motor fuel pipeline (4) and the rotary end test hydraulic pump fuel pipeline (5) for supplying fuel to the test hydraulic pump and hydraulic motor on the swing arm; the mounting platform (6) is arranged at the end of the acceleration test bench swing arm (101) and is used to mount the test hydraulic pump and the hydraulic motor that provides the rotation speed.

2. The device according to claim 1, characterized in that The rotary oil supply device (1) further comprises a rotary joint (7), a rotary joint bracket (8), and a bracket mounting plate (11), wherein the rotary joint (7) is used to connect a fixed end hydraulic motor fuel pipeline (2) and a rotary end hydraulic motor fuel pipeline (4), a fixed rotary test hydraulic pump fuel pipeline (3) and a rotary end test hydraulic pump fuel pipeline (5), the rotary joint (7) is mounted on the rotary joint bracket (8), the rotary joint bracket (8) is mounted on the acceleration test bench swing arm (101) through the bracket mounting plate (11), and the center of the rotary joint (7) is coaxial with the swing arm rotation axis (102).

3. The device according to claim 2, characterized in that The rotary joint (7) is a cylinder, and is divided into a stator side and a rotor side. The stator side is fixed and connected to a fixed end hydraulic motor fuel pipeline (2) and a fixed rotary test hydraulic pump fuel pipeline (3). The rotor side rotates with the acceleration test bench rotary arm (101). The end of the rotor side has a fuel hole, a rotary end hydraulic motor fuel pipeline (4), and a rotary end test hydraulic pump fuel pipeline (5).

4. The device according to claim 2, characterized in that The swivel joint bracket (8) comprises a supporting leg (81) and a hollow tray (82), the bottom of which is suspended and used to install a swivel end hydraulic motor fuel pipeline (4) and a swivel end tested hydraulic pump fuel pipeline (5), the supporting leg (81) and the hollow tray (82) are connected by welding or bolts, and the hollow tray (82) is fixed to the swivel joint (7).

5. The device according to claim 1, characterized in that The mounting platform (6) is a gear box or a bearing box, and through internal transmission, the hydraulic motor installed thereon provides speed transmission for the hydraulic pump under test.

6. The device according to claim 5, characterized in that The mounting platform (6) has the functions of rotating speed measurement and rotating speed regulation.

7. The device according to claim 5, characterized in that When the mounting platform is a gear box and the gear box is fixed, the acceleration test measurement in four directions can be achieved by rotating the installation direction of the tested hydraulic pump.

8. The device according to claim 7, characterized in that The gearbox is installed upside down, and the acceleration test in the remaining two directions is achieved by rotating the installation direction of the tested hydraulic pump.

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