Mechanical isolated dual-redundancy hydraulic speed-sensing rotary transformer sensor

Abstract

A kind of mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor belongs to sensor field, it is characterized in that: including cavity, rotor assembly and stator assembly.By setting cavity, rotor assembly is set in the cavity inside, rotor assembly is coupled with gear pump rotating shaft in application system through spline rotating shaft, cavity inner cavity plays the fixed installation to rotor assembly, simultaneously cavity has pressure resistance, when pressure hydraulic oil enters into cavity, can guarantee that hydraulic does not leak;While the outer wall of cavity is used to install stator assembly.Through cavity structure, it plays a hydraulic isolation effect in hydraulic system, isolates the path and pressure of hydraulic oil;The mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the application allows hydraulic oil to enter cavity, only needs to achieve oil protection to rotor cavity, stator assembly can be normally assembled and welded, simple structure, light, strong environmental adaptability, is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of sensor, especially relates to a mechanical isolation type double-redundancy hydraulic speed measuring rotary variable sensor. BACKGROUND

[0002] The existing speed measuring rotary variable sensor generally adopts shaft end seal to prevent high-pressure hydraulic oil from entering the product, but the torque of the rotating shaft is increased and the working efficiency of the gear pump is reduced. Some use the way of filling and sealing at the end of the flight to seal the hydraulic oil in the product. This way not only requires strict filling and sealing process, but also requires strict type of filling and sealing glue and flight. At the same time, the life of the coil in the hydraulic oil for a long time will also be reduced, and this way cannot guarantee that the hydraulic oil does not leak 100%, and the reliability is not high, so it cannot be used safely and effectively in the high-pressure hydraulic oil environment for a long time. SUMMARY

[0003] The present application aims to solve the above problems, and provides a mechanical isolation type double-redundancy hydraulic speed measuring rotary variable sensor with a split structure and capable of working in a pressure-resistant environment for a long time without interruption.

[0004] The mechanical isolation type double-redundancy hydraulic speed measuring rotary variable sensor provided by the present application comprises a cavity, a rotor assembly and a stator assembly.

[0005] The front end of the cavity is provided with a boss-shaped mounting flange; the inside of the cavity is provided with a bearing hole; the bearing hole is located at the tail end of the cavity.

[0006] The front end and the tail end of the rotor assembly are both provided with a rotating shaft.

[0007] The rotor assembly is arranged inside the inner cavity of the aforementioned cavity.

[0008] The front end and the tail end of the rotor assembly are both provided with a bearing; the rotor assembly is connected with the bearing through the aforementioned rotating shaft.

[0009] The bearing located at the tail end of the rotor assembly is arranged in the aforementioned bearing hole.

[0010] The rotating shaft at the front end of the rotor assembly is a spline rotating shaft.

[0011] The front end of the boss-shaped mounting flange is fixedly provided with a bearing end cover; a through hole is arranged on the bearing end cover.

[0012] The front end of the aforementioned spline rotating shaft passes through the through hole and is located outside the cavity.

[0013] The stator assembly is sleeved on the outer wall of the aforementioned cavity.

[0014] Further, the mechanical isolation type double-redundancy hydraulic speed measuring rotary variable sensor provided by the present application is provided with threads on the outer wall of the tail end of the cavity.

[0015] The tail end of the cavity is provided with a compression coil; the compression coil is connected with the cavity through the thread;

[0016] The compression coil and the stator assembly are provided with a stator support ring.

[0017] Further, the mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor, the rotor assembly is a double-channel rotor assembly;

[0018] The stator assembly includes two rotary transformer stators and two ring transformer stators; the two ring transformer stators are arranged between the two rotary transformer stators; through the double-redundancy setting of the rotor assembly and the stator assembly, double-redundancy output is realized, thereby effectively increasing signal redundancy and improving the reliability of the sensor.

[0019] Further, the mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor, the outside of the cavity is provided with a shell;

[0020] An opening is arranged on the side wall of the shell;

[0021] A navigation plug mounting seat is arranged on the side wall of the shell at a position corresponding to the opening;

[0022] A connector is arranged on one side of the navigation plug mounting seat; the connector is connected with the stator assembly in the cavity through a line, and is connected with an external data acquisition device through the connector, so as to realize the transmission of sensor monitoring data.

[0023] Further, the mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor, a threaded hole is arranged on the side wall of the shell at a position corresponding to the side wall of the boss-shaped mounting flange;

[0024] The shell and the cavity are connected through the threaded hole by a screw.

[0025] The mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor sets the rotor assembly in the cavity, the rotor assembly is coupled with the gear pump shaft in the application system through the spline shaft, the inner cavity of the cavity is used for fixedly mounting the rotor assembly, meanwhile, the cavity has pressure resistance, and the hydraulic oil can be prevented from leaking when entering into the cavity; meanwhile, the outer wall of the cavity is used for mounting the stator assembly. The cavity structure plays a hydraulic isolation role in the hydraulic system, and the path and pressure of the hydraulic oil are isolated; the mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor allows the hydraulic oil to enter the cavity, and only the rotor cavity needs to be resistant to oil protection, the stator assembly can be normally assembled and welded, the structure is simple, light and portable, and has strong environmental adaptability, and is suitable for popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment;

[0027] Figure 2 Exploded view of mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment;

[0028] Figure 3 Installation diagram of mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment;

[0029] Figure 4 Sectional view of mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment;

[0030] Wherein, 1-fastening screw; 2-bearing end cover; 3-bearing; 4-spline shaft; 5-rotor assembly; 6-gear housing; 7-cavity; 8-rotary transformer stator; 9-annular transformer stator; 10-stator support ring; 11-pressing coil; 12-housing; 13-tub-shaped mounting flange; 14-aviation plug mounting seat; 15-connector. DETAILED DESCRIPTION

[0031] The mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment will be described in detail below through the drawings and embodiments.

[0032] The mechanical isolation type double-redundancy hydraulic speed measuring rotary transformer sensor described in the embodiment, as shown in Figure 1 Figure 2 , comprises a cavity 7, a rotor assembly 5 and a stator assembly; the front end of the cavity 7 is provided with a tub-shaped mounting flange 13; the inside of the cavity 7 is provided with a bearing hole; the bearing hole is located at the tail end of the cavity 7; the front end and the tail end of the rotor assembly 5 are both provided with a shaft; the rotor assembly 5 is arranged inside the inner cavity of the aforementioned cavity 7; the front end and the tail end of the rotor assembly 5 are both provided with a bearing 3; the rotor assembly 5 is connected with the bearing 3 through the aforementioned shaft; the bearing 3 located at the tail end of the rotor assembly 5 is arranged in the aforementioned bearing hole, thereby fixing the bearing 3 at one end of the rotor assembly 5 through the bearing hole at the bottom of the cavity 7 while improving the stability of the bearing 3; the shaft at the front end of the rotor assembly 5 is a spline shaft 4; the front end of the tub-shaped mounting flange 13 is fixedly provided with a bearing end cover 2; the bearing end cover 2 is provided with a through hole; the front end of the aforementioned spline shaft 4 passes through the through hole and is located outside the cavity 7; the stator assembly is sleeved on the outer wall of the aforementioned cavity 7.

[0033] ​In the embodiment of the present disclosure, the tail end outer wall of the cavity 7 is provided with a thread; the tail end of the cavity 7 is provided with a compression coil 11; the compression coil 11 is connected with the cavity 7 through the thread; and the compression coil 11 is provided between the stator support ring 10 and the aforementioned stator assembly.

[0034] In the embodiment of the present disclosure, the rotor assembly 5 is a double-channel rotor assembly 5; the stator assembly includes two rotary variable stators 8 and two ring variable stators 9; the two ring variable stators 9 are arranged between the two rotary variable stators 8; through the double-redundancy arrangement of the rotor assembly 5 and the stator assembly, double-redundancy output is realized, thereby effectively increasing signal redundancy and improving sensor reliability.

[0035] In the embodiment of the present disclosure, the cavity 7 is externally provided with a shell 12; an opening is arranged on the side wall of the shell 12; a navigation plug mounting seat 14 is arranged on the side wall of the shell 12 at a position corresponding to the opening; a connector 15 is arranged on one side of the navigation plug mounting seat 14; a threaded hole is arranged on the front end side wall of the shell 12 and on the side wall of the boss-shaped mounting flange 13; and the shell 12 is connected with the cavity 7 through the threaded hole through a screw. The connector 15 and the stator assembly in the shell 12 are connected through a line, the connector 15 is connected with an external data acquisition device, and transmission of sensor monitoring data is realized.

[0036] In the embodiment of the present disclosure, the mechanical isolation type double-redundancy hydraulic speed measurement rotary variable sensor is assembled by the following steps: the bearing 3 at the tail end of the rotor assembly 5 is arranged in the bearing hole at the bottom of the cavity 7; and the combination of the spline shaft 4 and the double-channel rotor assembly 5 is arranged in the cavity 7.

[0037] Then, the bearing 3 at the front end of the rotor assembly 5 is arranged in the bearing end cover 2, the bearing end cover 2 is passed through the spline shaft 4 and is pressed into the cavity 7, and the bearing end cover 2 and the cavity 7 are connected through a fastening screw 1; and the stator assembly is sequentially arranged on the outer wall of the cavity 7 in the order of the rotary variable stator 8, the ring variable stator 9, the ring variable stator 9, and the rotary variable stator 8.

[0038] Then, the stator support ring 10 is arranged on the outer wall of the cavity 7, and the compression coil 11 is screwed on the thread at the tail end of the cavity 7; the navigation plug mounting seat 14 and the shell 12 are laser welded, and the opening on the shell 12 faces the bottom of the navigation plug mounting seat 14; the welded shell 12 and the navigation plug mounting seat 14 are arranged outside the cavity 7, and are connected through a screw.

[0039] Finally, the lead wires of the rotary variable stator 8 and the ring variable stator 9 are welded with the pin of the circular connector 15 through the lead wire hole of the shell 12, and the circular connector 15 is finally fixed on the navigation plug mounting seat 14 through a fastening screw 1.

[0040] In this embodiment, the cavity 7 is made of a non-magnetic material, resulting in less magnetic circuit obstruction. The reduced output due to increased magnetic reluctance can be compensated for in subsequent circuitry during practical applications. By performing thorough calculations during the design of the cavity 7, its withstand voltage margin can be significantly improved.

[0041] In this embodiment, the stator assembly and rotor assembly 5 are both equipped with coils. Since the rotor needs to be in contact with hydraulic oil for a long time, and the stator is isolated from the hydraulic oil due to the presence of the cavity 7, only the rotor needs to be potted in this embodiment. If it is necessary to improve the anti-aging and oxidation performance of the stator coil assembly, epoxy potting compound can be used to pot the stator coils to achieve moisture-proof, waterproof, dustproof, and resistance to damp heat, atmospheric aging, and oxidation.

[0042] In this embodiment, the rotor winding is encapsulated with thermally conductive potting compound to meet Class C insulation requirements. The resolver stator 8 and toroidal transformer stator 9 are encapsulated separately, and the resolver rotor and toroidal transformer rotor are encapsulated together. After encapsulation, excess adhesive is removed before direct assembly.

[0043] When using, such as Figure 3 , Figure 4 The sensor housing is connected to the hydraulic gear pump via a splined shaft 4, and the gear housing is connected to the gear housing 6. The gear pump is filled with aviation hydraulic oil, which can enter the interior along the shaft system without leakage. The rotation of the gear pump drives the splined shaft 4 to rotate, thereby driving the rotor to rotate. The rotational speed and direction of the hydraulic gear pump can be determined by analyzing the sine and cosine voltage signals output from the stator assembly via the circular connector 15. The mechanically isolated dual-redundant hydraulic tachometer resolver sensor described in this embodiment can achieve an angular deviation of less than 15′, while achieving a rotational speed cycle of more than 10,000 rpm, and realizing fine control of the output. Through its split structure, it can operate continuously in a pressure environment of more than 5 MPa for a long time.

Claims

1. A mechanically isolated dual-redundant hydraulic velocimetric resolver sensor, characterized in that: Includes the cavity, rotor assembly, and stator assembly; A boss-shaped mounting flange is provided at the front end of the cavity; a bearing hole is provided inside the cavity; the bearing hole is located at the rear end of the cavity. A rotating shaft is provided at both the front and rear ends of the rotor assembly; The rotor assembly is disposed inside the inner cavity of the aforementioned cavity; A bearing is provided at both the front and rear ends of the rotor assembly; the rotor assembly is connected to the bearing via the aforementioned shaft; The bearing located at the tail end of the rotor assembly is disposed within the aforementioned bearing hole; The rotor assembly's front-end shaft is configured as a spline shaft; A bearing end cap is fixedly provided at the front end of the boss-shaped mounting flange; a through hole is provided on the bearing end cap. The aforementioned spline shaft's front end passes through the through hole and is located outside the cavity; The stator assembly is fitted onto the outer wall of the aforementioned cavity.

2. The mechanically isolated dual-redundant hydraulic velocimetric resolver sensor according to claim 1, characterized in that: The outer wall at the tail end of the cavity is provided with threads; The tail end of the cavity is provided with a clamping screw ring; the clamping screw ring is connected to the cavity through the aforementioned thread; A stator support ring is provided between the clamping screw and the aforementioned stator assembly.

3. The mechanically isolated dual-redundant hydraulic velocimetric resolver sensor according to claim 2, characterized in that: The rotor assembly is a dual-channel rotor assembly; The stator assembly includes two resolver stators and two toroidal stators; the two toroidal stators are disposed between the two resolver stators.

4. The mechanically isolated dual-redundant hydraulic velocimetric resolver sensor according to claim 1 or 3, characterized in that: The cavity is provided with an outer shell; An opening is provided on the side wall of the outer casing; An aviation plug mounting base is provided on the side wall of the outer casing at a position corresponding to the aforementioned opening; A connector is provided on one side of the aircraft plug mounting base.

5. The mechanically isolated dual-redundant hydraulic velocimetric resolver sensor according to claim 4, characterized in that: Threaded holes are provided on the front side wall of the outer casing and on the side wall of the aforementioned boss-shaped mounting flange. The outer shell is connected to the aforementioned cavity by screws through the aforementioned threaded holes.

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