Ultralow-temperature liquid hydrogen rotary joint with elastic locking and stabilizing mechanism

Abstract

The invention relates to the technical field of ultralow-temperature fluid medium matching, in particular to an ultralow-temperature liquid hydrogen rotating joint with an elastic locking stabilizing mechanism, which comprises a mounting flange, an inner ring and an outer ring. According to the ultralow-temperature liquid hydrogen rotating joint with the elastic locking and stabilizing mechanism, an annular adjusting cover internally provided with an internal extrusion piston is fixedly assembled between the inner ring and the second clamping sleeve joint, a lubricating medium can be automatically supplemented to a steel ball transmission surface according to internal pressure, and internal friction force is greatly reduced; the pressure in the conveying cavity can be adjusted while a lubricating medium is supplemented to the steel ball transmission cavity through the internal extrusion piston, so that the impact on the connecting end of the joint is reduced, and the safety of the joint is improved; lubricating media in the annular adjusting cover are driven through internal pressure, the lubricating media are forcibly pressed into small gaps of mechanical parts in a high-pressure lubricating mode, and the lubricating effect and the sealing effect can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-low temperature fluid medium matching, in particular to a rotary joint for ultra-low temperature liquid hydrogen with an elastic locking stabilization mechanism. Background Art

[0002] The most critical part of the fluid loading and unloading arm is the rotary joint. With the development needs of industry, new energy-liquid hydrogen medium will become the future development trend. In order to ensure that the medium can pass through the joint smoothly without leakage when the mechanical equipment rotates during the low-key installation process, a rotary joint needs to be set at the connection end.

[0003] Traditional rotary joints only use steel balls to reduce the resistance of the connection end to facilitate the rotation of the rotary joint. However, this rolling method still produces relatively large friction. Long-term use will cause the internal gap to become larger, impurities to accumulate, and subsequent maintenance will be difficult. At the same time, when the medium is started, it will cause huge pressure on the joint, and the internal pressure resistance of the joint is very high, which greatly increases the cost of the joint. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the traditional rotary joint is difficult to maintain in the later stage, and at the same time, when the medium is started, it will cause huge pressure on the joint, and the internal pressure resistance of the joint is very high, which greatly increases the cost of the joint.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a rotary joint for ultra-low temperature liquid hydrogen with an elastic locking stabilization mechanism, comprising a mounting flange, an inner ring and an outer ring, a plurality of steel balls for reducing friction resistance are arranged on the movable assembly surfaces of the inner ring and the outer ring, an external operation hole for convenient replacement and maintenance of the steel balls is opened on the outer side surface of the outer ring, a first ferrule joint protruding outward is fixedly assembled inside the mounting flange, a second ferrule joint protruding outward is fixedly assembled inside the inner ring, an annular adjustment cover is fixedly assembled between the inner ring and the second ferrule joint, and a plurality of internal extrusion pistons are movably assembled inside the annular adjustment cover.

[0006] An inner wall telescopic hole is provided on the inner wall of the second ferrule joint corresponding to the position of the internal extrusion piston.

[0007] A plurality of internal control chambers for assembling internal extrusion pistons are provided inside the annular adjustment cover.

[0008] The internal extrusion piston comprises an external extrusion piston arranged inside the inner wall telescopic hole, an internal extrusion piston slidably installed in the internal control chamber, an internal extrusion spring controlling the internal extrusion piston and an internal linkage shaft.

[0009] An annular guide groove matching with the steel ball is formed on the arc-shaped assembly surface of the inner ring, and an inclined extrusion hole communicating with the annular guide groove is formed on the inner wall of the internal control chamber.

[0010] A lateral fluid replenishing nozzle for replenishing lubricating medium is arranged on the outer side of the annular adjustment cover at the gap position between the inner ring and the second ferrule joint.

[0011] Sealing rings are arranged between the mounting flange and the inner ring connection surface, between the mounting flange and the outer ring connection surface, and between the inner ring and the outer ring connection surface.

[0012] An external limiting mechanism is threadedly assembled at the outer opening position of the external operating hole.

[0013] A lateral limiting slot is provided on the inner side of the external operating hole.

[0014] The external limiting mechanism includes an external adjusting bolt threadedly assembled inside the external operating hole, an internal extrusion head elastically assembled inside the external adjusting bolt through an internal extrusion spring, an internal stretching rod elastically assembled inside the external adjusting bolt, and a lateral control connecting rod controlled by the internal stretching rod.

[0015] The beneficial effects of the present invention are:

[0016] (1) The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism of the present invention can automatically replenish lubricating medium to the steel ball transmission surface according to the internal pressure by fixing an annular adjustment cover with an internal extrusion piston installed between the inner ring and the second ferrule joint, thereby greatly reducing the internal friction;

[0017] (2) While replenishing the lubricating medium to the steel ball transmission chamber through the internal squeezing piston, the pressure inside the transmission chamber can also be adjusted to reduce the impact on the joint connection end and improve the safety of the joint;

[0018] (3) The lubricating medium inside the annular regulating cover is driven by internal pressure, and the lubricating medium is forced into the small gaps of the mechanical parts by high-pressure lubrication, which can ensure the lubrication and sealing effects;

[0019] (4) Through the expansion and contraction adjustment of the internal extrusion piston, the outlet and recovery of the lubricating medium can be automatically adjusted according to the internal pressure changes, thereby facilitating control;

[0020] (5) A lateral filling nozzle for replenishing the lubricating medium is provided on the outer side of the annular adjustment cover at the gap between the inner ring and the second ferrule joint, which can facilitate subsequent maintenance;

[0021] (6) An external operation hole is opened on the outer surface of the outer ring to facilitate the replacement and maintenance of the steel ball, which can greatly reduce the difficulty and cost of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the internal structure of the annular adjustment cover in the present invention.

[0026] Figure 4 It is a schematic diagram of the internal structure of the external operating hole in the present invention. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1 , Figure 2 , Figure 3 and Figure 4 A rotary joint for ultra-low temperature liquid hydrogen with an elastic locking stabilization mechanism is shown, comprising a mounting flange 1, an inner ring 2 and an outer ring 3. 42 steel balls 4 for reducing friction resistance are arranged on the movable assembly surfaces of the inner ring 2 and the outer ring 3. An external operation hole 5 for convenient replacement and maintenance of the steel balls 4 is opened on the outer side surface of the outer ring 3. A first ferrule joint 6 protruding outward is fixedly assembled inside the mounting flange 1, a second ferrule joint 7 protruding outward is fixedly assembled inside the inner ring 2, an annular adjustment cover 8 is fixedly assembled between the inner ring 2 and the second ferrule joint 7, and six internal extrusion pistons 9 are movably assembled inside the annular adjustment cover 8.

[0030] Operating principle: The material guide pipes at both ends are connected respectively through the first ferrule joint 6 and the second ferrule joint 7, and then when the material feeding starts, the internal extrusion piston 9 is squeezed, and then the lubricating medium inside the annular adjustment cover 8 is introduced into the connecting section of the steel ball 4, located between the inner ring 2 and the outer ring 3.

[0031] In order to cooperate with the internal telescopic adjustment, an inner wall telescopic hole is opened at the inner wall of the second ferrule joint 7 corresponding to the position of the internal extrusion piston 9.

[0032] In order to cooperate with the internal control, six internal control chambers 10 for assembling the internal extrusion pistons 9 are opened inside the annular adjustment cover 8 .

[0033] In order to cooperate with the extrusion control, the internal extrusion piston 9 includes an external extrusion piston 91 arranged inside the inner wall telescopic hole, an internal extrusion piston 92 slidably installed in the internal control chamber 10, an internal extrusion spring 93 for controlling the internal extrusion piston 92, and an internal linkage shaft 94.

[0034] Both ends of the internal linkage shaft 94 are fixedly assembled with the external extrusion piston 91 and the internal extrusion piston 92 respectively.

[0035] In order to cooperate with the guidance and the introduction of the lubricating medium, an annular guide groove 11 cooperating with the steel ball 4 is opened on the arc-shaped assembly surface of the inner ring 2, and an inclined extrusion hole 12 connected to the annular guide groove 11 is opened on the inner wall of the internal control chamber 10.

[0036] When installing and conveying the internal medium, the internal pressure will squeeze the external extrusion piston 91, and the internal extrusion piston 92 will be controlled to slide in the internal control chamber 10 through the internal linkage shaft 94, and then the lubricating medium in the internal control chamber 10 will be introduced into the annular guide groove 11 through the inclined extrusion hole 12, and then a chamber filled with lubricating medium will be formed between the inner ring 2 and the outer ring 3, thereby greatly improving the lubrication effect of the steel ball 4 and improving the airtightness of the internal conveying medium.

[0037] In order to facilitate external replenishment, a lateral replenishment nozzle 13 for replenishing the lubricating medium is provided on the outer side of the annular adjustment cover 8 at a gap position between the inner ring 2 and the second ferrule joint 7 .

[0038] After long-term use, the lubricating medium inside the annular adjustment cover 8 will be lost to a certain extent, and then it is necessary to regularly replenish new lubricating medium into the internal control chamber 10 through the lateral liquid replenishing nozzle 13.

[0039] In order to improve the sealing performance on the assembly surface, sealing rings 14 are provided between the connecting surfaces of the mounting flange 1 and the inner ring 2 , between the connecting surfaces of the mounting flange 1 and the outer ring 3 , and between the connecting surfaces of the inner ring 2 and the outer ring 3 .

[0040] In order to cooperate with the external closing limit, an external limit mechanism 15 is threadedly assembled at the outer opening position of the external operating hole 5.

[0041] In order to cooperate with the lateral limit, a lateral limit slot 16 is opened on the inner side of the external operating hole 5.

[0042] In order to cooperate with the bolt adjustment, the external limiting mechanism 15 includes an external adjusting bolt 151 threadedly assembled inside the external operating hole 5, an internal extrusion head 153 elastically assembled on the inner side of the external adjusting bolt 151 through an internal extrusion spring 152, an internal stretching rod 154 elastically assembled inside the external adjusting bolt 151, and a lateral control link 155 controlled by the internal stretching rod 154.

[0043] By rotating the external adjustment bolt 151 to adjust its position inside the external operation hole 5, the lateral control link 155 is inserted into the lateral limit slot 16 to limit the lateral position so that it cannot rotate. Only when the internal stretching rod 154 is pulled outward, the lateral control link 155 is controlled to shrink inside the external adjustment bolt 151, so that the lateral control link 155 is separated from the inside of the lateral limit slot 16. At this time, the external adjustment bolt 151 can rotate normally, and then drive the internal extrusion head 153 to separate from the steel ball 4, so that the steel ball 4 can be replaced conveniently. One end of the lateral control link 155 is movably assembled with the inside of the external adjustment bolt 151, and the other end is movably connected with the outside of the internal stretching rod 154. The outside of the internal stretching rod 154 is located in the external adjustment bolt 151 and is sleeved with a reset spring, and the outside of the internal stretching rod 154 is installed with an external control head for convenient control of stretching.

[0044] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rotary joint for cryogenic liquid hydrogen with an elastic locking stabilization mechanism, comprising a mounting flange (1), an inner ring (2) and an outer ring (3), wherein: A plurality of steel balls (4) for reducing friction resistance are arranged on the movable assembly surfaces of the inner ring (2) and the outer ring (3); an external operation hole (5) for facilitating replacement and maintenance of the steel balls (4) is opened on the outer surface of the outer ring (3); a first ferrule joint (6) protruding outward is fixedly assembled inside the mounting flange (1); a second ferrule joint (7) protruding outward is fixedly assembled inside the inner ring (2); an annular adjustment cover (8) is fixedly assembled between the inner ring (2) and the second ferrule joint (7); and a plurality of internal extrusion pistons (9) are movably assembled inside the annular adjustment cover (8).

2. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 1 is characterized in that: An inner wall telescopic hole is provided on the inner wall of the second ferrule joint (7) at a position corresponding to the internal extrusion piston (9).

3. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 2 is characterized in that: The annular adjustment cover (8) is provided with a plurality of internal control chambers (10) for assembling the internal extrusion piston (9).

4. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 3 is characterized in that: The internal extrusion piston (9) comprises an external extrusion piston (91) arranged inside the inner wall telescopic hole, an internal extrusion piston (92) slidably mounted in the internal control chamber (10), an internal extrusion spring (93) controlling the internal extrusion piston (92), and an internal linkage shaft (94).

5. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 1 is characterized in that: The arc-shaped assembly surface of the inner ring (2) is provided with an annular guide groove (11) matching with the steel ball (4), and the inner wall of the internal control chamber (10) is provided with an inclined extrusion hole (12) connected with the annular guide groove (11).

6. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 1 is characterized in that: The outer side surface of the annular adjustment cover (8) is provided with a lateral liquid replenishing nozzle (13) for replenishing the lubricating medium at a gap position between the inner ring (2) and the second ferrule joint (7).

7. The ultra-low temperature liquid hydrogen rotary joint with an elastic locking stabilization mechanism according to claim 1 is characterized in that: Sealing rings (14) are provided between the connection surfaces of the mounting flange (1) and the inner ring (2), between the connection surfaces of the mounting flange (1) and the outer ring (3), and between the connection surfaces of the inner ring (2) and the outer ring (3).

8. The rotary joint for ultra-low temperature liquid hydrogen with an elastic locking stabilization mechanism according to claim 1 is characterized in that: An external limiting mechanism (15) is threadedly assembled at the outer opening position of the external operating hole (5).

9. The ultra-low temperature liquid hydrogen rotary joint with elastic locking stabilization mechanism according to claim 8 is characterized in that: A lateral limiting slot (16) is provided on the inner side of the external operating hole (5).

10. The rotary joint for ultra-low temperature liquid hydrogen with an elastic locking stabilization mechanism according to claim 9, characterized in that: The external limiting mechanism (15) comprises an external adjusting bolt (151) threadedly mounted inside the external operating hole (5), an internal extrusion head (153) elastically mounted inside the external adjusting bolt (151) via an internal extrusion spring (152), an internal stretching rod (154) elastically mounted inside the external adjusting bolt (151), and a lateral control connecting rod (155) controlled by the internal stretching rod (154).

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