CN219202887U - Sealed double-redundancy rotary transformer - Google Patents

Abstract

The utility model discloses a sealed double-redundancy rotary transformer, which comprises an outer shell, a front end shell component, a rear end shell component and a rotor component; the shell comprises a vertical and through transverse cavity and a longitudinal cavity, the left end of the transverse cavity is provided with a component mounting hole, the right end of the transverse cavity is closed, and the socket mounting hole is formed in the side face of the longitudinal cavity; the rear end shell component and the front end shell component are sequentially fixed in the transverse cavity, and the rotor component is arranged at the axis of the transverse cavity; the outer shell is fixed with a flange. Through the improvement of the connecting structure of the outer shell and the rear end shell component, the original welding seam structure is removed, pressure bearing is transferred to the flange outside the shell, the integral pressure bearing capacity of pressure transformation is improved, and the tightness of the product in a high-pressure environment is ensured.

Description

Sealed double-redundancy rotary transformer

Technical Field

The utility model belongs to the technical field of rotary transformers, and particularly relates to a sealed double-redundancy rotary transformer.

Background

The resolver is widely used as an axial angle sensor in a servo system, a hydraulic drive system and a follow-up system. In recent years, in the field of operation of hydraulic drive systems such as aviation, navigation, and weaponry, a sealed rotary transformer is used as a signal feedback component to improve the accurate operability of the system. Meanwhile, in order to improve the reliability and performance stability of the rotary transformer, the design requirement of redundancy is increased, namely, the sealed dual-redundancy rotary transformer is mainly selected.

The sealed double-redundancy rotary transformer mainly comprises a rotor assembly with two groups of serially connected coil windings driven by an output/input shaft, and an independent rotary stator assembly is matched with the rotor coil windings to output two groups of voltage signals with consistent parameters.

As shown in fig. 1 and 2, the prior art sealed dual redundancy rotary transformer includes an outer housing 21, an existing front end housing assembly 23, an existing back end housing assembly 24, an existing rotor assembly 22, and a glass frit socket 12. The housing 21 is of a three-way construction. The existing rotor assembly 22 is located at the axial center of the lateral cavity of the housing 21 and the existing front end housing assembly 23 is fixed inside the front end of the housing. The existing rear housing assembly 24 is then inserted into the interior of the rear end of the housing through an existing rear housing 25. The rear end of the housing 21 is sealed by welding with an existing rear housing 25 on an existing rear housing assembly 24 to form a weld 26. The side wall of the longitudinal cavity of the shell, which is close to the top end, is provided with a socket mounting hole, and the socket mounting hole and the glass sintering socket are generally sealed by adopting an end face sealing gasket or a sealing ring.

In the state of the dual-redundancy resolver working, the inside of the cavity of the housing is filled with a hydraulic medium, which generates an outwardly expanding pressure. The structure of the shell and the connection mode of the shell and the existing back-end shell component can know that in the existing sealed dual-redundancy rotary transformer, the quality of a welding seam between the shell and the back-end shell component and the quality of a welding seam at a process hole at the top end of the shell are mainly easy to influence the sealing effect. The welding quality of the welded seam is extremely strict due to the requirement of the sealing pressure value, and the sealing failure of the product can be caused by the control of the welding process or the defect of the welding quality, so that the dual-redundancy rotary transformer even the whole hydraulic system is failed, and the welding sealing has limited bearing capacity and can not meet the use requirement of the high-pressure sealing environment of the current product through test verification.

Disclosure of Invention

In view of the above, the utility model provides a sealed dual-redundancy rotary transformer, which improves the bearing capacity and ensures the sealing reliability through the structural improvement, thereby meeting the requirement of products on high-voltage sealing.

The technical scheme adopted by the utility model is as follows: a sealed double-redundancy rotary transformer comprises an outer shell, a front end shell component, a rear end shell component, a rotor component and a glass sintering socket; the method is characterized in that: the outer shell comprises two sections of cavities, namely a vertical and through transverse cavity and a vertical cavity; the left end of the transverse cavity is a component mounting hole, the right end of the transverse cavity is closed, and the socket mounting hole is formed in the outer shell on the side surface of the longitudinal cavity; the rear end shell component and the front end shell component are sequentially fixed in the transverse cavity, and the rotor component is arranged at the axis of the transverse cavity through a bearing; the outer shell is fixedly provided with a flange on the outer wall close to the assembly mounting hole; the glass sintering socket is fixed on the socket mounting hole.

Further, the rear end shell component consists of a ring-shaped transformer primary component and a rotary transformer stator component which are arranged in the rear end shell, wherein the ring-shaped transformer primary component is arranged in front, and the rotary transformer stator component is arranged in back; the rear end shell is a cylindrical sleeve; the front end shell component consists of a rotary stator component and a ring-shaped primary component which are arranged in the front end shell, wherein the rotary stator component is arranged in front, and the ring-shaped primary component is arranged behind; the front end housing includes a sleeve conforming to the shape of the rear end housing.

Further, a mounting ring is arranged in front of the sleeve of the front end shell, screw holes parallel to the axis are uniformly formed in the end face of the mounting ring, and a circle of boss is arranged on the outer edge of the mounting ring; the front end of the outer shell mounting hole is provided with a circle of steps; the boss is embedded with the step and the end surfaces are coincided and fixed.

Further, the joint of the glass sintering socket and the socket mounting hole is provided with a double O-shaped sealing ring.

Further, the gaps of the rear end housing assembly, the front end housing assembly and the rotor assembly are all filled with epoxy resin.

The beneficial effects of the utility model are as follows: through the improvement of the connecting structure of the outer shell and the rear end shell component, the original welding seam structure is removed, pressure bearing is transferred to the flange outside the shell, the integral pressure bearing capacity of pressure transformation is improved, and the tightness of the product in a high-pressure environment is ensured.

Drawings

Fig. 1 is a schematic diagram of a conventional sealed dual redundancy resolver.

Fig. 2 is an axial cross-sectional view of fig. 1.

Fig. 3 is a schematic view of the overall structure of the present utility model.

Fig. 4 is an axial cross-sectional view of fig. 3.

Fig. 5 is a schematic view of the structure of the outer case in the present utility model.

Fig. 6 is a schematic structural view of the rear housing assembly of the present utility model.

Fig. 7 is a schematic structural view of the front end housing assembly of the present utility model.

Fig. 8 is a schematic view of the structure of the rotor assembly of the present utility model.

In the figure: 1. the outer shell, 2, the transverse cavity, 3, the longitudinal cavity, 4, the assembly mounting hole, 5, the lead wire through hole, 6, the socket mounting hole, 7, the flange, 7-1, the flange hole, 7-2, the flange root, 8, the lead wire, 9, the back end shell assembly, 10, the front end shell assembly, 11, the rotor assembly, 12, the glass sintering socket, 13, the back end shell, 14, the ring change primary assembly, 15, the spin change stator assembly, 16, the front end shell, 16-1, the mounting ring, 16-2, the screw hole, 16-3, the boss, 17, the rotor shaft, 18, the spin change primary assembly, 19, the ring change secondary assembly, 20, the O-shaped sealing ring, 21, the shell, 22, the existing rotor assembly, 23, the existing front end shell assembly, 24, the existing back end shell assembly, 25, the existing back end shell, 26 and the welding seam.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 3 and 4, a sealed double redundancy rotary transformer includes an outer case 1, a front end case assembly 10, a rear end case assembly 9, a rotor assembly 11, and a glass frit socket 12.

As shown in fig. 5, the outer casing 1 has a T-shaped hollow structure. The outer housing 1 comprises a two-stage cavity. The two sections of cavities are a vertical and through transverse cavity 2 and a vertical cavity 3, and the through part is a lead-out wire via hole 5. The transverse cavity 2 is located below for mounting 11 the rear end housing assembly 9, the front end housing assembly 10 and the rotor assembly. The longitudinal cavity 3 is located above for receiving the lead-out wires 8. The left end of the transverse cavity 2 is provided with a component mounting hole 4, and the right end of the transverse cavity 2 is closed. The rear end housing assembly 9, the front end housing assembly 10, the rotor assembly 11 and other corresponding connectors are installed by entering the transverse cavity 2 through the assembly mounting holes 4. The outer shell 1 on the side surface of the longitudinal cavity 3 is provided with a socket mounting hole 6. A flange 7 is fixed to the outer wall of the outer case 1 near the assembly mounting hole 4. The flange 7 is a main component for connecting and fixing with an external system and bearing the outer shell 1.

As shown in fig. 4 and 6, the rear housing assembly 9 is composed of a rear housing 13, a ring-change primary assembly 14, and a rotational-change stator assembly 15. The rear end housing 13 is a cylindrical sleeve. The ring-change primary assembly 14 and the rotary stator assembly 15 are respectively fixed on the inner wall of the rear end housing 13 at the front and the rear, and a through hole capable of accommodating the rotor assembly 11 to pass through is reserved at the axial center position. The rear housing assembly 9 is provided as a channel i signal output in the present utility model. The toroidal primary assembly 14 acts as an input coil assembly for switching on the excitation voltage and acts to transfer the excitation to the toroidal secondary assembly 19 in the rotor assembly 11 by electromagnetic coupling. The resolver stator assembly 15 is composed of a stator lamination of a resolver general structure, coil windings, stator end face sheets, slot wedges and the like, the stator lamination is formed by laminating a certain number of stator laminations, and two groups of sine windings and cosine windings which are perpendicular to each other are embedded in lamination slots.

As shown in fig. 4 and 7, the front end housing assembly 10 is composed of a front end housing 16, a rotational stator assembly 15, and a ring transformer primary assembly 14. The front and back ring-shaped primary assemblies 14 of the rotary stator assembly 15 are respectively fixed on the inner wall of the back section of the front end shell 16, and a through hole capable of accommodating the rotor assembly 11 to pass through is reserved at the axial center position. The front end housing assembly 10 is provided as a channel ii signal output in the present utility model. The rotary transformer sub-assembly 15 and the annular transformer primary assembly 14 adopt the same structure and technical design parameters as the rotary transformer sub-assembly 15 and the annular transformer primary assembly 14 in the rear end housing assembly 9 so as to ensure the requirement of the signal output consistency of the channel I and the channel II in the utility model. The front end housing 16 includes a front and rear sleeve. The rear section of the front end housing 16 conforms to the shape of the rear end housing 13. The front section of the front end housing 16 is a mounting ring 16-1. The inner bore of the mounting ring 16-1 is used to mount the bearing attachment rotor assembly 11. Screw holes 16-2 parallel to the axis are uniformly formed in the end face of the mounting ring 16-1. The outer edge of the mounting ring 16-1 is provided with a circle of bosses 16-3. The front end of the outer casing 1, i.e. the front end of the assembly mounting hole 4, is provided with a circle of corresponding steps.

During installation, the rear end housing assembly 9 and the front end housing assembly 10 are pressed into the transverse cavity 2 in sequence from the assembly mounting hole 4. The front end housing 16 and the rear end housing 13 form a close fit with the inner wall of the lateral cavity 2, respectively. The rear end of the rear end shell 13 is propped against the bottom of the rear end of the outer shell 1, and the boss 16-3 at the front end of the front end shell 16 is embedded with the step at the front end of the outer shell 1 and the end surfaces are overlapped and fixed. The front end housing assembly 10 and the rear end housing assembly 9 are located on both sides of the lead-out wire via 5, respectively. The lead wires 8 in the front end housing assembly 10 and the rear end housing assembly 9 enter the longitudinal cavity 3 through the lead wire vias 5. The rotary transformer stator assemblies 15 and the annular transformer primary assemblies 14 in the front end housing assembly 10 and the rear end housing assembly 9 are symmetrically distributed relative to the outgoing line via holes 5.

As shown in fig. 4 and 8, the rotor assembly 11 is composed of a rotor shaft 17 and two sets of series-connected rotary primary assemblies 18 and ring-change secondary assemblies 19 fixed to the rotor shaft 17. The rotational primary assembly 18 corresponds to the rotational stator assembly 15 and the annular secondary assembly 19 corresponds to the annular primary assembly 14. The two sets of series-connected rotary primary components 18 and the ring-variable secondary components 19 adopt the same structural design and design technical parameters, and generate an alternating magnetic field when the rotor assembly 11 rotates to work. The rotary transformer primary assembly 18 is composed of rotor lamination layers, coil windings, rotor end face sheets, slot wedges and the like of a rotary transformer general structure, the rotor lamination layers are formed by laminating a certain number of rotor lamination layers, and two groups of sine and cosine windings which are perpendicular to each other are embedded in lamination grooves. The ring transformer secondary component 19 is used as an exciting voltage power supply element of the rotation transformer primary component 18, and transmits the exciting voltage input by the ring transformer primary component 14 to the rotation transformer primary component 18. Under the action of alternating magnetic fields of the rotor assembly 11, the two groups of rotary-variable stator assemblies 15 in the front-end housing assembly 10 and the rear-end housing assembly 9 enable the two groups of rotary-variable stator assemblies 15 in the front-end housing assembly 10 and the rear-end housing assembly 9 to output electric signals with consistent parameters, and the function of dual-redundancy synchronous work of products is realized.

The rotor assembly 11 is arranged at the axial position of the transverse cavity 2 of the outer shell 1 through a bearing. The rear end of the rotor shaft 17 is connected to the bottom of the rear end of the outer housing 1 through a bearing, and the front end of the rotor shaft 17 is connected to the mounting ring 16-1 of the front housing 16 through a bearing. The front end of the rotor shaft 17 protrudes out of the front end of the outer housing 1. The front end of the rotor shaft 17 is provided with an end cap. The end cap is connected to screw holes 16-2 of the mounting ring 16-1 of the front end housing 16 by screws. The aperture of the end cap central bore is larger than the shaft diameter of the rotor shaft 17.

From the above, the rear end housing component 9 is pressed into the transverse cavity 2 of the outer housing 1, so as to replace the welded structure between the rear end housing component 9 and the outer housing 1, avoid the generation of welding seams, and further improve the overall sealing bearing capacity of the outer housing 1.

The socket mounting hole 6 is provided with a glass sintering socket 12, and the glass sintering socket 12 is connected with the outgoing line 8. To further ensure the reliability of the sealing of the socket mounting holes 6, a double O-ring 20 is added between the socket mounting holes 6 and the glass-sintered socket 12.

In the utility model, the original welding seam between the rear end shell assembly 9 and the outer shell 1 is eliminated through the structural arrangement and the connection mode change of the outer shell 1, the rear end shell assembly 9 and the front end shell assembly 10, so that when the outer shell 1 is filled with the hydraulic medium, the flange 7 connected with an external system becomes a main pressure-bearing member. The bearing points of the flange 7 are positioned at the flange holes 7-1 and the flange root 7-2 where the flange 7 is in transition with the outer shell 1. The pressure bearing capacity of the outer shell 1 can be controlled by adjusting the thickness of the flange 7 and the arrangement and the number of the flange holes 7-1.

It should be noted that the thickness of the flange 7 and the bearing design of the flange hole 7-1, and the threaded bearing design of the pressure control stud 22 can be determined by the existing method. In the present utility model, a detailed description is omitted.

In summary, through the improvement of the structure, the utility model avoids the generation of welding lines between the rear end shell assembly 9 and the outer shell 1, improves the bearing capacity of the transformer on the whole, and further meets the sealing performance in a high-pressure environment.

The rear end shell assembly 9, the front end shell assembly 10 and the rotor assembly 11 are all integrally encapsulated and processed by adopting epoxy resin with oil-resistant liquid medium, so that the coil in the assembly and nonmetallic materials are protected from corrosion in the hydraulic medium, the stability of the product performance is ensured, and the environmental adaptability of the dual-redundancy rotary transformer is further improved.

Claims (5)

1. A sealed double-redundancy rotary transformer comprises an outer shell, a front end shell component, a rear end shell component, a rotor component and a glass sintering socket; the method is characterized in that: the outer shell comprises two sections of cavities, namely a vertical and through transverse cavity and a vertical cavity; the left end of the transverse cavity is a component mounting hole, the right end of the transverse cavity is closed, and the socket mounting hole is formed in the outer shell on the side surface of the longitudinal cavity; the rear end shell component and the front end shell component are sequentially fixed in the transverse cavity, and the rotor component is arranged at the axis of the transverse cavity through a bearing; the outer shell is fixedly provided with a flange on the outer wall close to the assembly mounting hole; the glass sintering socket is fixed on the socket mounting hole.

2. A sealed dual redundancy rotary transformer according to claim 1, wherein: the rear end shell component consists of a ring-shaped transformer primary component and a rotary transformer stator component which are arranged in the rear end shell, wherein the ring-shaped transformer primary component is arranged in front of the rotary transformer stator component; the rear end shell is a cylindrical sleeve; the front end shell component consists of a rotary stator component and a ring-shaped primary component which are arranged in the front end shell, wherein the rotary stator component is arranged in front, and the ring-shaped primary component is arranged behind; the front end housing includes a sleeve conforming to the shape of the rear end housing.

3. A sealed dual redundancy rotary transformer according to claim 2, wherein: a mounting ring is arranged in front of the sleeve of the front end shell, screw holes parallel to the axis are uniformly formed in the end face of the mounting ring, and a circle of boss is arranged on the outer edge of the mounting ring; the front end of the outer shell mounting hole is provided with a circle of steps; the boss is embedded with the step and the end surfaces are coincided and fixed.

4. A sealed dual redundancy rotary transformer according to claim 1, wherein: and a double O-shaped sealing ring is arranged at the joint of the glass sintering socket and the socket mounting hole.

5. A sealed dual redundancy rotary transformer according to claim 1, wherein: gaps of the rear end shell assembly, the front end shell assembly and the rotor assembly are filled with epoxy resin.

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