Rotary joint for high temperature and high pressure

Abstract

The utility model relates to rotary joint technical field, and disclose a kind of rotary joint for high temperature and high pressure, including rotary joint main part and the hollow shaft rotationally installed in middle part;Sealing cavity is opened in rotary joint main part, and the dynamic ring assembly in sealing cavity is sleeved on hollow shaft, and dynamic ring assembly is used to seal the connecting place between hollow shaft and rotary joint main part, sealing cavity can be passed into sealing liquid and cool, lubricate dynamic ring assembly and rotary joint main part.The utility model proposes a kind of rotary joint for high temperature and high pressure, by setting up sealing liquid circulating system in rotary joint main part, directly cooling lubrication high-speed rotating hollow shaft, increase synchronous rotation dynamic ring assembly, prevent sealing liquid axial leakage, additionally set up independent cooling water circulating system, and the main body is cooled, by double cooling and dynamic sealing, effectively temperature control leak protection, guarantee rotary joint main part long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of rotary joint technology, and in particular to a rotary joint for high temperature and high pressure applications. Background Technology

[0002] A rotary joint is a key component used in rotating equipment to transfer fluids (such as liquids and gases). Its main structure includes a rotating shaft that connects to the rotating parts of the equipment. In practical applications, various materials such as toluene and nitrogen can be transported to the rotating parts of the equipment through the rotating shaft of the rotary joint, thereby ensuring that the equipment can still receive the required materials and maintain its normal operation during rotation. In the chemical production field, some large rotary reactors need to be continuously rotated while organic solvents such as toluene are transported into them through rotary joints to ensure the smooth progress of the reaction. In the machinery manufacturing industry, some rotating parts of equipment need to be supplied with nitrogen through rotary joints during operation for cooling, protection, and other purposes.

[0003] However, in the prior art, the rotating shaft of the rotary joint generates a lot of heat due to friction and other factors when rotating at high speed. Over time, this heat accumulates and causes the temperature of the rotating shaft to rise continuously. When the temperature rises to a certain level, the rotating shaft will thermally expand, which will lead to deformation. Once the rotating shaft deforms, its connection with the rotating parts and its fit with the sealing parts will be affected. In this case, the rotary joint may experience sealing failure, causing leakage of the transported medium such as toluene or nitrogen.

[0004] To address the aforementioned problems, this application proposes a rotary joint for high temperature and high pressure applications. Utility Model Content

[0005] Based on the technical problems existing in the background art, this utility model proposes a rotary joint for high temperature and high pressure.

[0006] This utility model proposes a rotary joint for high temperature and high pressure, which includes a rotary joint body and a hollow shaft rotatably installed in its middle.

[0007] The rotary joint body has a sealing cavity, and a rotating ring assembly located in the sealing cavity is fitted on the hollow shaft. The rotating ring assembly is used to seal the connection between the hollow shaft and the rotary joint body. Sealing fluid can be introduced into the sealing cavity to cool and lubricate the rotating ring assembly and the rotary joint body.

[0008] The rotary joint body has a cooling chamber arranged around the hollow shaft, and the cooling chamber is not connected to the sealing chamber. Cooling water can be circulated into the cooling chamber for cooling.

[0009] Preferably, the rotary joint body has an inlet channel and an outlet channel communicating with the sealing cavity. One side of the rotary joint body is provided with an inlet end communicating with the inlet channel, and the other side is provided with an outlet end communicating with the outlet channel.

[0010] Preferably, one side of the rotary joint body is provided with a water inlet end communicating with the cooling chamber, and the other side is provided with a water outlet end communicating with the cooling chamber.

[0011] Preferably, the rotating ring assembly includes a stationary ring, a rotating ring, and an O-ring. The stationary ring is installed inside the rotary joint body and sleeved on the hollow shaft. The stationary ring has a through hole that allows the hollow shaft to rotate. The stationary ring is located below the sealing cavity. A rotating ring, which is fixedly sleeved on the hollow shaft and located inside the sealing cavity, is rotatably fitted on the stationary ring. An O-ring, which is sleeved on the hollow shaft, is installed on the inner wall of the rotating ring.

[0012] Preferably, the moving ring assembly further includes a spring body and a spring seat, wherein the moving ring body is fitted with a spring seat that is mounted on the hollow shaft via the spring body.

[0013] Preferably, the top end of the hollow shaft is integrally connected to a feed end, and the bottom end is integrally connected to a discharge end.

[0014] Preferably, a bracket is installed on the outer periphery of the rotary joint body, and the bracket has mounting holes.

[0015] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0016] 1. In use, connect the hollow shaft on the rotary joint body to the rotating part of the equipment. When the rotating part of the equipment rotates, it drives the hollow shaft to rotate as well. In order to reduce the heat generated when the hollow shaft rotates, a sealing cavity is opened in the rotary joint body. The sealing fluid is delivered into the sealing cavity through the inlet end and the inlet channel, and then discharged through the outlet channel and the outlet end, forming a circulation flow. The above design allows the sealing fluid to circulate in the sealing cavity, directly lubricating and cooling the high-speed rotating hollow shaft, effectively reducing the heat generated by friction, avoiding thermal deformation of the hollow shaft due to excessive temperature, and thus ensuring its long-term stable operation.

[0017] 2. To prevent the sealing fluid flowing in the sealing cavity from flowing down the hollow shaft and causing leakage, a rotating ring assembly located inside the sealing cavity is installed on the hollow shaft. When the hollow shaft rotates, the rotating ring assembly rotates with it, preventing the sealing fluid in the sealing cavity from flowing down the hollow shaft and leaking. The above design, by setting a rotating ring assembly that rotates synchronously with the hollow shaft, effectively blocks the path of axial leakage of the sealing fluid in the sealing cavity, ensuring the integrity of the sealing system, preventing leakage of the working medium, and improving the safety of the equipment.

[0018] 3. When the hollow shaft rotates, the heat generated during rotation is conducted to the rotary joint body itself. Therefore, a cooling chamber is formed inside the rotary joint body, surrounding the rotary joint body. The cooling chamber is not connected to the sealing chamber. During use, cooling water is delivered into the cooling chamber through the inlet and then discharged through the outlet, forming a cooling cycle. The above design, through the cooling chamber and cooling water circulation system, can effectively remove the heat conducted to the rotary joint body, prevent the overall structure from overheating, further control the working temperature, and provide double protection for the sealing of the rotary joint body under high pressure and high temperature conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a rotary joint for high temperature and high pressure proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the dynamic ring assembly of this utility model.

[0021] Reference numerals in the attached drawings: 1. Rotary joint body; 101. Hollow shaft; 1011. Feed end; 1012. Discharge end; 2. Moving ring assembly; 21. Stationary ring; 22. Moving ring; 23. O-ring; 24. Spring body; 25. Spring seat; 3. Sealing cavity; 31. Inlet channel; 311. Liquid inlet end; 32. Outlet channel; 321. Liquid outlet end; 4. Cooling chamber; 41. Water inlet end; 42. Water outlet end; 5. Bracket; 51. Mounting hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0023] Example 1

[0024] like Figure 1 and Figure 2 As shown, the present invention proposes a rotary joint for high temperature and high pressure, which includes a rotary joint body 1 and a hollow shaft 101 rotatably installed in the middle of the body;

[0025] A sealing cavity 3 is provided inside the rotary joint body 1. A rotating ring assembly 2 located inside the sealing cavity 3 is fitted on the hollow shaft 101. The rotating ring assembly 2 is used to seal the connection between the hollow shaft 101 and the rotary joint body 1. Sealing fluid can be introduced into the sealing cavity 3 to cool and lubricate the rotating ring assembly 2 and the rotary joint body 1.

[0026] The rotary joint body 1 has a cooling chamber 4 arranged around the hollow shaft 101, and the cooling chamber 4 is not connected to the sealing chamber 3. Cooling water can be circulated into the cooling chamber 4 for cooling.

[0027] In use, the hollow shaft 101 on the rotary joint body 1 is connected to the rotating component of the equipment. When the rotating component of the equipment rotates, it drives the hollow shaft 101 to rotate as well. During this process, the sealing fluid is delivered to the sealing cavity 3 to form a circulation flow, which carries away the heat generated when the hollow shaft 101 rotates and also lubricates it, reducing the friction when the hollow shaft 101 rotates. At the same time, the independently set cooling chamber 4 surrounds the hollow shaft 101. By circulating cooling water into the cooling chamber 4, the heat conducted from the inside to the rotary joint body 1 itself can be continuously carried away, realizing the overall cooling of the structure. This dual design of internal lubrication cooling and external circulation heat dissipation ensures that the rotary joint body 1 can operate stably under high temperature and high pressure conditions.

[0028] In a specific embodiment, the rotary joint body 1 has an inlet channel 31 and an outlet channel 32 communicating with the sealing cavity 3. One side of the rotary joint body 1 is provided with an inlet end 311 communicating with the inlet channel 31, and the other side is provided with an outlet end 321 communicating with the outlet channel 32. In use, the inlet end 311 is connected to the inlet pipe, and the outlet end 321 is connected to the outlet pipe. The inlet pipe and the outlet pipe are connected to an external cooling system. The sealing fluid is introduced into the sealing cavity 3 through the inlet end 311 and the inlet channel 31. After completing the cooling and lubrication of the rotating ring assembly 2 and the hollow shaft 101, the heated sealing fluid is discharged from the outlet end 321 through the outlet channel 32 under pressure and returned to the external system for cooling and recirculation. This design realizes the dynamic circulation of the sealing fluid. On the one hand, it can continuously provide circulating lubricating medium for the rotating ring assembly 2 and the hollow shaft 101, avoiding lubrication failure caused by aging and wear of the sealing fluid. On the other hand, it can promptly carry the absorbed heat out of the sealing cavity 3 to prevent the local temperature in the sealing cavity 3 from being too high.

[0029] In a specific embodiment, one side of the rotary joint body 1 is provided with a water inlet end 41 communicating with the cooling chamber 4, and the other side is provided with a water outlet end 42 communicating with the cooling chamber 4. The water inlet end 41 serves as the input interface for cooling water, used to connect to an external cooling water supply system, and can deliver cooling water to the cooling chamber 4. The water outlet end 42 serves as the discharge interface for cooling water, connected to a recovery or heat dissipation device, forming a cooling water circulation path. The structure of the cooling chamber 4 arranged around the hollow shaft 101 allows the cooling water to fully contact the inner wall of the rotary joint body 1. During the circulation process, the cooling water quickly absorbs the heat on the rotary joint body 1 through heat conduction, including the heat conducted by the rotation of the hollow shaft 101 and the residual heat diffused from the sealing cavity 3. Then, the cooling water is discharged through the water outlet end 42. This continuous circulating cooling method can effectively control the overall temperature of the rotary joint body 1, avoid performance degradation and deformation of the rotary joint body 1 due to high temperature, and prevent the sealing fluid in the sealing cavity 3 from being too hot, thus affecting the sealing effect and ensuring the stable operation of the rotary joint body 1 under high temperature conditions.

[0030] Example 2

[0031] To prevent the sealing fluid flowing inside the sealing cavity 3 from flowing down the hollow shaft 101 and causing leakage, a dynamic ring assembly 2 located inside the sealing cavity 3 is installed on the hollow shaft 101, as detailed below:

[0032] In a specific embodiment, the rotating ring assembly 2 includes a stationary ring 21, a rotating ring 22, and an O-ring 23. The stationary ring 21 is installed inside the rotary joint body 1 and sleeved on the hollow shaft 101. The stationary ring 21 has a through hole that allows the hollow shaft 101 to rotate. The stationary ring 21 is located below the sealing cavity 3. The rotating ring 22, which is fixedly sleeved on the hollow shaft 101 and located in the sealing cavity 3, is rotatably fitted on the stationary ring 21. The O-ring 23, which is sleeved on the hollow shaft 101, is installed on the inner wall of the rotating ring 22.

[0033] The stationary ring 21 provides support and guidance for the rotation of the hollow shaft 101 and forms a sealing base surface. The rotating ring 22 rotates synchronously with the hollow shaft 101, and forms a dynamic seal with the stationary ring 21. Through the tight fit of the contact surfaces of the two, the path of leakage of sealing fluid along the axial direction of the hollow shaft 101 is blocked. The O-ring 23 uses its elastic deformation characteristics to fill the tiny gap between the rotating ring 22 and the hollow shaft 101, thereby achieving a static seal between the rotating ring 22 and the hollow shaft 101 and preventing the sealing fluid from leaking from the mating gap between the two.

[0034] The relative rotational engagement of the stationary ring 21 and the moving ring 22, along with the elastic sealing effect of the O-ring 23, together constitute a multi-layer sealing structure, which improves the sealing performance of the sealing cavity 3, avoids lubrication and cooling failures caused by leakage of sealing fluid, and ensures the sealing reliability of the rotary joint body 1 under high pressure conditions.

[0035] In a specific embodiment, the rotating ring assembly 2 further includes a spring body 24 and a spring seat 25. The spring seat 25, which is fitted onto the hollow shaft 101, is mounted on the rotating ring body 22 via the spring body 24. The spring seat 25 can continuously apply axial elastic force to the rotating ring body 22 via the spring body 24, pushing the rotating ring body 22 to always be tightly fitted against the sealing surface of the stationary ring body 21. During the operation of the rotary joint, the hollow shaft 101 rotates at high speed, causing the rotating ring body 22 to rotate. Inevitably, slight wear will occur between the rotating ring body 22 and the stationary ring body 21. At this time, the elastic restoring force of the spring body 24 can compensate for the amount of wear in time, ensuring that the two always remain tightly fitted, and avoiding the formation of sealing gaps due to wear.

[0036] In a specific embodiment, the top end of the hollow shaft 101 is integrally connected to the feed end 1011, and the bottom end is integrally connected to the discharge end 1012. The feed end 1011 is located at the top end of the hollow shaft 101 and is used to connect to an external material supply pipeline, which can stably transport fluid media such as toluene and nitrogen into the hollow shaft 101. The discharge end 1012 is located at the bottom end of the hollow shaft 101 and is connected to the feed port of the rotating part of the equipment, so as to transport the medium inside the hollow shaft 101 into the rotating part.

[0037] In a specific embodiment, a bracket 5 is installed on the outer periphery of the rotary joint body 1, and a mounting hole 51 is provided on the bracket 5; the bracket 5 provides a mounting and fixing structure for the rotary joint body 1, and the mounting hole 51 on the bracket 5 can be adapted to fasteners such as bolts, so that the rotary joint body 1 can be fixed in a designated position of the equipment through the mounting hole 51.

[0038] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model, and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary joint for high temperature and high pressure, characterized in that, It includes a rotary joint body (1) and a hollow shaft (101) rotatably mounted in its middle. The rotary joint body (1) has a sealing cavity (3) inside. The hollow shaft (101) is fitted with a rotating ring assembly (2) located in the sealing cavity (3). The rotating ring assembly (2) is used to seal the connection between the hollow shaft (101) and the rotary joint body (1). The sealing cavity (3) can be filled with sealing fluid to cool and lubricate the rotating ring assembly (2) and the rotary joint body (1). The rotary joint body (1) has a cooling chamber (4) arranged around the hollow shaft (101), and the cooling chamber (4) is not connected to the sealing chamber (3). Cooling water can be circulated into the cooling chamber (4) for cooling.

2. The rotary joint for high temperature and high pressure according to claim 1, characterized in that, The rotary joint body (1) has an inlet channel (31) and an outlet channel (32) that communicate with the sealing cavity (3). One side of the rotary joint body (1) is provided with an inlet end (311) that communicates with the inlet channel (31), and the other side is provided with an outlet end (321) that communicates with the outlet channel (32).

3. A rotary joint for high temperature and high pressure according to claim 1, characterized in that, The rotary joint body (1) has a water inlet (41) on one side that communicates with the cooling chamber (4) and a water outlet (42) on the other side that communicates with the cooling chamber (4).

4. A rotary joint for high temperature and high pressure according to claim 1, characterized in that, The rotating ring assembly (2) includes a stationary ring (21), a rotating ring (22), and an O-ring (23). The stationary ring (21) is installed inside the rotary joint body (1) and sleeved on the hollow shaft (101). The stationary ring (21) has a through hole that allows the hollow shaft (101) to rotate. The stationary ring (21) is located below the sealing cavity (3). The stationary ring (21) is rotatably fitted with a rotating ring (22) that is fixedly sleeved on the hollow shaft (101) and located in the sealing cavity (3). The inner wall of the rotating ring (22) is fitted with an O-ring (23) that is sleeved on the hollow shaft (101).

5. A rotary joint for high temperature and high pressure according to claim 4, characterized in that, The moving ring assembly (2) also includes a spring body (24) and a spring seat (25). The moving ring body (22) is equipped with a spring seat (25) that is fitted onto the hollow shaft (101) via the spring body (24).

6. A rotary joint for high temperature and high pressure according to claim 1, characterized in that, The hollow shaft (101) is integrally connected to a feed end (1011) at its top end and an outlet end (1012) at its bottom end.

7. A rotary joint for high temperature and high pressure according to claim 1, characterized in that, A bracket (5) is installed on the outer periphery of the rotary joint body (1), and the bracket (5) has a mounting hole (51).

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