CN116111800B - A sealed pressure controllable dual-redundant rotary transformer - Google Patents

Abstract

The invention discloses a sealing pressure controllable dual-redundancy rotary transformer which comprises an outer shell, a front end shell component, a rear end shell component and a rotor component, wherein the outer shell comprises a vertical and through transverse cavity, a vertical cavity, a component mounting hole, a process hole and a socket mounting hole, the left end of the transverse cavity is the component mounting hole, the right end of the transverse cavity is closed, the process hole is positioned at the top end of the vertical cavity, the socket mounting hole is formed in the side surface of the vertical cavity, the rear end shell component and the front end shell component are sequentially fixed in the transverse cavity, the rotor component is arranged at the axis of the transverse cavity, a flange is fixed on the outer shell, and a blocking head is arranged in the process hole. Through the improvement of the connecting structure of the outer shell and the rear end shell component and the arrangement of the blocking head on the process hole, the key problems of process hole sealing and pressure controllability are solved, and meanwhile, the integral high-voltage sealing performance of the dual-redundancy rotary transformer is realized.

Description

Sealing pressure controllable dual-redundancy rotary transformer

Technical Field

The invention belongs to the technical field of rotary transformers, and particularly relates to a sealing pressure controllable dual-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 hermetically sealed double redundancy rotary transformer includes a housing 26, an existing front end housing assembly 27, an existing back end housing assembly 28, an existing rotor assembly 31, and a receptacle 32. The housing 26 is of a three-way construction. The existing rotor assembly 31 is located in the axial position of the transverse cavity of the housing 26 and the existing front end housing assembly 27 is secured within the front end of the housing. The existing back end housing assembly 28 is then inserted into the interior of the back end of the housing through an existing back end housing 29. The rear end of the housing 26 is sealed by welding with an existing rear end housing 29 on an existing rear end housing assembly 28 to form a weld 30. The top end opening of the longitudinal cavity of the shell is a process hole which is used for processing a lead wire through hole positioned in the shell. Due to the trend of miniaturization of dual redundancy rotary transformers. The process hole cannot be sealed by using an end face due to the limitation of the structure volume, and a welding sealing mode is often adopted. The side wall of the housing longitudinal cavity near the top end is provided with a socket mounting hole, and the socket mounting hole and the socket 32 are generally sealed by 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.

As described above, along with the miniaturization, light weight and increasing high-voltage sealing demand trend of the dual-redundancy rotary transformer, the sealed dual-redundancy rotary transformer needs to solve the key problem of pressure-resistant sealing.

Disclosure of Invention

In view of the above, the invention provides a sealing pressure controllable dual-redundancy rotary transformer, which aims at a miniaturized transformer structure, and ensures the sealing reliability through the structural improvement, and can adjust the pressure-resistant capability along with the pressure increase so as to achieve the purpose of effectively controlling the sealing pressure of a product.

The technical scheme includes that the sealing pressure-controllable 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, and is characterized in that the outer shell comprises two sections of cavities and three holes, the two sections of cavities are vertical and through transverse cavities and longitudinal cavities, the three holes are respectively a component mounting hole, a process hole and a socket mounting hole, the component mounting hole is formed in the left end of the transverse cavity, the right end of the transverse cavity is closed, the process hole is formed in the top end of the longitudinal cavity, the socket mounting hole is formed in the outer shell on 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, 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 component mounting hole, a sealing plug is arranged in the process hole, and the glass sintering socket is fixed on the socket mounting hole.

The sealing plug is a split type pressure control double sealing plug and comprises a pressure control stud and a double sealing plug screw, the process hole comprises a step hole and a threaded hole, the aperture of the step hole is larger than the inner diameter of the longitudinal cavity, the aperture of the threaded hole is larger than the aperture of the step hole, the double sealing plug screw is higher than the step hole, the lower section of the double sealing plug screw is a round table, the upper section of the double sealing plug screw is an I-shaped cylinder, the small round diameter of the round table is smaller than the inner diameter of the longitudinal cavity, the large round diameter of the round table is the same as the diameter of the I-shaped cylinder, the I-shaped cylinder is in clearance fit with the step hole, an O-shaped sealing ring is sleeved in a limiting groove on the outer circumference of the I-shaped cylinder, the O-shaped sealing ring is extruded with the step hole, the pressure control stud is in threaded connection with the threaded hole, and the pressure control stud is extruded with the double sealing plug screw.

Further, the pressure control stud is of a thread self-locking structure.

Further, a threaded anaerobic adhesive is coated between the pressure control stud and the threaded hole.

Further, the rear end shell assembly comprises a ring-shaped primary assembly and a rotary-changing stator assembly which are arranged in the rear end shell, the ring-shaped primary assembly is arranged in the front and the rotary-changing stator assemblies are arranged in the rear end shell, the rear end shell is a cylindrical sleeve, the front end shell assembly comprises a rotary-changing stator assembly and a ring-changing primary assembly which are arranged in the front end shell, the rotary-changing stator assembly is arranged in the front and the rotary-changing primary assembly is arranged in the rear, and the front end shell comprises a sleeve consistent with the shape of the rear end shell.

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, a circle of boss is arranged on the outer edge of the mounting ring, a circle of step is arranged at the front end of the mounting hole of the outer shell, and the boss is embedded with the step and the end face is overlapped 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 invention has the beneficial effects that the key problems of sealing and controllable overall pressure of the miniaturized dual-redundancy rotary transformer at the process hole are solved by improving the connecting structure of the outer shell and the rear end shell component and arranging the blocking head on the process hole. Meanwhile, the overall high-voltage sealing performance of the dual-redundancy rotary transformer is realized, and the pressure capacity of a product can be effectively controlled, so that the technical problems of high-voltage sealing, reliable quality and stable performance of the sealed dual-redundancy rotary transformer are fundamentally solved.

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 diagram of the overall structure of the seal pressure controllable dual-redundancy resolver of the present invention.

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 invention.

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

Fig. 7 is a schematic diagram of the rear end housing assembly of the present invention after epoxy resin encapsulation.

Fig. 8 is a schematic structural view of the front end housing assembly of the present invention.

Fig. 9 is a schematic diagram of the front end housing assembly of the present invention after epoxy encapsulation.

Fig. 10 is a schematic view of the structure of the rotor assembly of the present invention.

Fig. 11 is a schematic diagram of the entire encapsulation of the epoxy resin of the rotor assembly of the present invention.

Fig. 12 is a schematic structural view of a split pressure control double seal plug according to the present invention.

In the figure, 1, an outer shell, 2, a transverse cavity, 3, a longitudinal cavity, 4, a component mounting hole, 5, a lead-out wire via hole, 6, a process hole, 6-1, a threaded hole, 6-2, a step hole, 7, a socket mounting hole, 8, a flange, 8-1, a flange hole, 8-2, a flange root, 9, a rear end shell component, 10, a front end shell component, 11, a rotor component, 12, a glass sintering socket, 13, a rear end shell, 14, a ring-change primary component, 15, a rotation-change stator component, 16, a front end shell, 16-1, a mounting ring, 16-2, a threaded hole, 16-3, a boss, 17, a rotor shaft, 18, a rotation-change primary component, 19, a ring-change secondary component, 20, a split pressure control double seal plug, 21, double seal plug, 21-1, a round boss, 21-2, an I-shaped cylinder, 22, a pressure control stud, 23, an O-shaped seal ring, 24, 25, an epoxy resin, 26, a shell, 27, an existing front end shell component, 28, a lead-out wire, 31, an existing rotor shell, a rear end shell component, 30, an existing socket component, and a weld joint 32 are shown.

Detailed Description

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

As shown in fig. 3 and 4, a sealing pressure controllable dual-redundancy rotary transformer includes an outer case 1, a front end case assembly 10, a rear end case assembly 9, a rotor assembly 11, a glass frit socket 12, and a sealing plug.

As shown in fig. 5, the outer casing 1 has a T-shaped hollow structure. The outer housing 1 comprises two sections of cavities and three openings. 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 24. The three openings are respectively a component mounting hole 4, a process hole 6 and a socket mounting hole 7. The assembly mounting hole 4 is positioned at the left end of the transverse cavity 2, 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 process orifice 6 is located at the top end of the longitudinal cavity 3. The socket mounting hole 7 is formed in the outer shell 1 on the side surface of the longitudinal cavity 3. A flange 8 is fixed to the outer wall of the outer case 1 near the assembly mounting hole 4. The flange 8 is the 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 output as a channel I signal in the present invention. 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 8, 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 output as a channel II signal in the present invention. 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 invention. 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 24 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 10, 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 7 is provided with a glass sintering socket 12, and the glass sintering socket 12 is connected with the outgoing line 24. To further ensure the reliability of the sealing of the socket mounting holes 7, a double O-ring 23 is added between the socket mounting holes 7 and the glass-sintered socket 12.

As shown in fig. 4 and 12, the process hole 6 is sealed by a split pressure control double seal plug 20 according to the present invention. As shown in fig. 5, the process hole 6 is divided into two sections, a stepped hole 6-2 located below and a threaded hole 6-1 located above. The diameter of the stepped hole 6-2 is larger than the inner diameter of the longitudinal cavity 3. The bore diameter of the threaded bore 6-1 is larger than the inner diameter of the stepped bore 6-2. As shown in fig. 12, the split pressure control double seal plug 20 includes a pressure control stud 22 and a double seal plug 21. The lower section of the double seal screw plug 21 is a conical round table 21-1, and the upper section of the double seal screw plug 21 is an I-shaped cylinder 21-2. The small circle diameter of the round table 21-1 is smaller than the inner diameter of the longitudinal cavity 3, and the large circle diameter of the round table 21-1 is the same as the diameter of the I-shaped cylinder 21-2. The double seal plug 21 has a height greater than the height of the stepped hole 6-2. The I-shaped cylinder 21-2 of the double seal screw plug 21 forms clearance fit with the stepped hole 6-2. An O-shaped sealing ring 23 is sleeved in a limit groove around the outer circumference of the I-shaped cylinder 21-2. The O-ring 23 is pressed against the stepped bore 6-2. The pressure control stud 22 is fitted into the threaded hole 6-1. The screwed pressure control stud 22 compresses the double sealing plug screw 21, so that the round table 21-1 of the double sealing plug screw 21 is propped against the lower end of the stepped hole 6-2, and a double sealing mode of mechanical extrusion sealing and O-shaped sealing ring 23 sealing is achieved.

The pressure control stud 22 is screwed by a torque wrench having a wrench head with a corresponding shape by providing a connection port on the surface.

The lower end face of the pressure control stud 22 is provided with a circular groove, the diameter of the circular groove is matched with the diameter of the I-shaped cylinder 21-2 of the double-seal screw plug 21, so that the stressed bearing area of the pressure control stud 22 is ensured to be consistent with the stressed acting area of the double-seal screw plug 21, the sealing bearing capacity of the split type pressure control double-seal plug 20 is effectively improved, and meanwhile, the weight of the pressure control stud 22 can be reduced.

The split pressure control double seal plug 20 applies a double seal to the process orifice 6. The first heavy seal is a mechanical extrusion seal, and the screwed pressure control stud 22 is used for pressing the double seal plug 21, so that the round table 21-1 and the step hole 6-2 form the mechanical extrusion seal. The second sealing is realized by sealing the hole wall of the step hole 6-2 through an O-shaped sealing ring 23. The problem that the process hole 6 can only be welded and sealed is solved by double sealing, and effective sealing pressure control of the process hole 6 can be realized through the pressure control stud 22.

The sealing pressure is controllable according to the invention, mainly by means of the arrangement of the outer housing 1 and the pressure control stud 22. Since the present invention eliminates the original weld between the rear housing assembly 9 and the outer housing 1, the flange 8 connected to the external system becomes a main pressure-receiving member when the outer housing 1 is filled with the hydraulic medium. The bearing points of the flange 8 are positioned at the flange holes 8-1 and the flange root 8-2 where the flange 8 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 8 and the arrangement and the number of the flange holes 8-1. The pressure control stud 22 may be configured as a thread self-locking structure to prevent loosening of the pressure control stud 22, and in addition, the pressure control stud 22 ensures the sealing bearing capacity of the split type pressure control double-sealing plug 20 and the process hole 6 by adjusting the effective height of the thread and the thread fit. Smearing the threaded anaerobic adhesive on the pressure control stud 22 and the threaded bore 6-1 further prevents the pressure control stud 22 from loosening.

It should be noted that the thickness of the flange 8 and the bearing design of the flange hole 8-1, as well as the threaded bearing design of the pressure control stud 22, can be determined by conventional methods. In the present invention, a detailed description is omitted.

In summary, the invention avoids the generation of welding lines between the rear end housing assembly 9 and the outer housing 1, and the split type blocking head solves the problem of sealing the process hole 6 of the miniaturized transformer. Therefore, the invention improves the sealing performance of the transformer on the whole through the improvement of the structure. And due to the change of the structure of the outer shell 1, the dual-redundancy rotary transformer achieves the purpose of effectively controlling the sealing pressure by adjusting the corresponding dimension parameters of the flange 8 and the split pressure control dual-sealing plug 20, and realizes the sealing of products.

As shown in fig. 7, 9 and 11, the rear end housing assembly 9, the front end housing assembly 10 and the rotor assembly 11 are all integrally encapsulated and processed by the epoxy resin 25 with oil-resistant liquid medium, so that the protection effect of corrosion prevention of coils and nonmetallic materials in the assemblies in the hydraulic medium is achieved, the stability of the product performance is ensured, and the environmental adaptability of the dual-redundancy rotary transformer is further improved.

Claims (6)

1. A sealed pressure-controllable dual-redundancy rotary transformer, comprising an outer shell, a front shell assembly, a rear shell assembly, a rotor assembly and a glass sintered socket; characterized in that: the outer shell comprises two sections of cavity and three openings; the two sections of cavity are a transverse cavity and a longitudinal cavity that are vertical and through, the three openings are respectively a component mounting hole, a process hole and a socket mounting hole; the component mounting hole is located at the left end of the transverse cavity, the right end of the transverse cavity is closed, the process hole is located at the top of the longitudinal cavity, and the socket mounting hole is opened on the outer shell on the side of the longitudinal cavity; the rear shell assembly and the front shell assembly are fixed in the transverse cavity in sequence, and the rotor assembly is arranged at the axis center of the transverse cavity through a bearing; a flange is fixed on the outer wall of the outer shell near the component mounting hole; a sealing head is provided in the process hole; the glass sintered socket is fixed on the socket mounting hole; the sealing head is a split pressure control double sealing plug, including a pressure control stud and a double sealing screw plug; the process hole includes a step hole and a threaded hole, and the aperture of the step hole The double-sealed screw plug has a diameter greater than the inner diameter of the longitudinal cavity, and the diameter of the threaded hole is greater than the diameter of the stepped hole. The height of the double-sealed screw plug is greater than the height of the stepped hole. The lower section of the double-sealed screw plug is a frustum and the upper section is an I-shaped cylinder. The small diameter of the frustum is smaller than the inner diameter of the longitudinal cavity, and the large diameter of the frustum is the same as the diameter of the I-shaped cylinder. The I-shaped cylinder and the stepped hole form a clearance fit. An O-ring is inserted into a limiting groove on the outer circumference of the I-shaped cylinder, and the O-ring and the stepped hole form an extrusion. The pressure control stud is threadedly connected to the threaded hole, and the pressure control stud and the double-sealed screw plug form an extrusion. The rear end housing assembly comprises a rear end housing, a primary transformer assembly and a rotary transformer stator assembly disposed in the rear end housing, with the primary transformer assembly in front and the stator assembly in the rear end. The rear end housing is a cylindrical sleeve. The front end housing assembly comprises a front end housing, a rotary transformer stator assembly and a primary transformer assembly disposed in the front end housing, with the stator assembly in front and the primary transformer assembly in the rear end. The front end housing includes a sleeve having the same shape as the rear end housing. 2. A sealed pressure-controllable dual-redundant rotary transformer according to claim 1, characterized in that the pressure control stud is a threaded self-locking structure. 3. The sealed pressure-controllable dual-redundant rotary transformer according to claim 1, wherein thread anaerobic adhesive is coated between the pressure control stud and the threaded hole. 4. A sealed pressure-controllable dual-redundancy rotary transformer according to claim 1, characterized in that: a mounting ring is provided in front of the sleeve of the front end housing, the end face of the mounting ring is evenly provided with screw holes parallel to the axis, and the outer edge of the mounting ring is provided with a circle of bosses; a circle of steps is provided at the front end of the outer shell mounting hole; the bosses and steps are embedded in each other and the end faces are overlapped and fixed. 5. The sealed pressure controllable dual-redundancy rotary transformer according to claim 1, wherein a double O-ring is provided at the connection between the glass frit socket and the socket mounting hole. 6. The sealed pressure-controllable dual-redundant rotary transformer according to claim 1, wherein the gaps between the rear housing assembly, the front housing assembly, and the rotor assembly are filled with epoxy resin.