Rotary joint for aluminum casting process
By using corrugated gasket and sealing ring structures in the rotary joint for aluminum melt casting process, and using the elastic deformation of the corrugated spring, the first bearing remains free at high temperature, solving the problem of rotary joints being stuck due to bearing expansion and achieving normal operation and efficient production in a high-temperature environment.
Patent Information
- Application Number
- CN202422424151.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the aluminum melting and casting process, the bearings of the rotary joints expand due to thermal expansion and contraction in a high temperature environment, resulting in jamming and unable to rotate normally, affecting the normal operation of the chlorine transmission pipeline, and poses safety hazards and low production efficiency problems.
A rotary joint for aluminum melt casting process is designed, and a corrugated gasket and sealing ring structure is adopted. Through the design of the first bearing and the second bearing, the elastic deformation of the corrugated spring is used to keep the first bearing free in a high temperature and avoid jamming.
Ensure normal rotation of the rotary joint under high temperature environment, avoid the winding problem of chlorine transmission pipelines, improve production efficiency, extend the service life of the rotary joints, and reduce production costs.
Smart Images
Figure CN223035907U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of rotary joints, and particularly relates to a rotary joint for aluminum melting and casting process. Background Art
[0002] Aluminum and aluminum alloy products are widely used in industries such as aerospace, navigation, missiles, and packaging aluminum foil. With the development of society, the requirements for aluminum and aluminum alloy products are getting higher and higher. In order to make the comprehensive performance of aluminum and aluminum products meet the requirements, there are also high requirements for their internal metallurgical quality. During the melting and casting process of aluminum and aluminum alloy products, chlorine gas is generally used to remove harmful gases, oxides, impurities, and inclusions in the aluminum melt. Chlorine gas needs to be transmitted through a rotary joint.
[0003] A rotary joint is a connecting and sealing device that inputs fluid media from a stationary pipeline into a rotating or reciprocating device and then discharges them from the rotary joint. The main uses of the rotary joint include, but are not limited to, transmitting various media such as gas, liquid, and oil, and can also work normally under high-speed and high-pressure working conditions. Rotary joints are widely used in many industrial fields, such as the cooling systems in industries such as steel, metallurgy, and paper making, as well as industries such as machine tools, power generation, petroleum, and textiles, playing a key role.
[0004] In the aluminum melting and casting process, the rotary joint needs to ensure the normal rotation of the central axis while sealing and transmitting chlorine gas. In the prior art, the transmission pipeline of chlorine gas is hermetically connected to the sleeve inside the rotary joint. There are two bearings connected to the outside of the sleeve. When the two bearings are installed and used, one bearing is a fixed end to prevent the bearing from moving axially, and the other bearing is a floating end, which can rotate smoothly by adjusting the bearing state during the rotation process. However, the adjustment range of the bearing as the floating end is limited. The aluminum melting and casting process is carried out at high temperatures, and the bearing will be affected by the high temperature and expand and contract thermally. The bearing will expand axially, and the space inside the rotary joint is limited. When the bearing expands to a certain extent, it will be unable to rotate and get stuck inside the rotary joint, resulting in the inability of the rotary joint to continue rotating. The inability of the rotary joint to rotate will cause the transmission pipeline of chlorine gas to rotate, and then get entangled, which requires shutdown for maintenance, posing a safety hazard and affecting production efficiency at the same time.
[0005] The utility model provides a rotary joint for aluminum melting and casting process to solve the above problems. Summary of the Utility Model
[0006] In order to solve the above technical problems, the utility model provides a rotary joint for aluminum melting and casting process, which has a simple structure and is easy to use. It solves the problem of bearing jamming caused by axial expansion of the bearing inside the rotary joint in a high-temperature environment, enables the normal transmission of chlorine gas in the aluminum melting and casting process, and improves production efficiency.
[0007] The technical solution adopted by the present utility model is as follows: A rotary joint for an aluminum melting and casting process, comprising a sleeve. The sleeve is cylindrical, with a circular through-hole penetrating through the middle. A sealing ring is provided inside the right end of the sleeve. A boss is provided at the middle and rear end on the outside of the sleeve. The outside of the middle of the sleeve is connected to a rotating mechanism. The upper right part of the rotating mechanism is connected to a snap ring sleeved outside the sleeve. The lower right part of the rotating mechanism is connected to the boss at the middle and rear end of the sleeve. A sealing sleeve is sleeved on the sleeve at the left end of the rotating mechanism. The sealing sleeve is tightly connected to the sleeve. The right end of the sealing sleeve is connected to the lower left part of the rotating mechanism. A corrugated washer is sleeved on the outside of the right end of the sealing sleeve. The right end of the corrugated washer is connected to the upper left part of the rotating mechanism. An oil seal assembly is sleeved on the outside of the sealing sleeve at the left end of the corrugated washer and on the rear end of the sleeve. An outer shell is sleeved outside the oil seal assembly, the corrugated washer, the rotating mechanism, and the snap ring.
[0008] The rotating mechanism includes a first bearing and a second bearing. The lower right part of the first bearing is connected to the left side of a spacer sleeve. The right side of the spacer sleeve is connected to the lower left part of the second bearing. The lower right part of the second bearing is connected to the boss at the middle and rear end of the sleeve.
[0009] The oil seal assembly includes a first skeleton oil seal and a second skeleton oil seal. The first skeleton oil seal is sleeved on the outside of the sealing sleeve at the left end of the corrugated washer and is connected to the sealing sleeve. The second skeleton oil seal is sleeved on the sleeve at the right end of the snap ring.
[0010] An annular boss extends outward from the left end of the outer shell. The inside of the left end and the inside of the right end of the outer shell are connected to the oil seal assembly. The inside of the middle of the outer shell is sequentially provided with a corrugated washer, a rotating mechanism, and a snap ring from left to right. The outer ring of the snap ring is arranged in a groove opened on the inner side of the rear end of the outer shell.
[0011] The sealing ring is made of rubber and the number is two.
[0012] When using this rotary joint for the aluminum melting and casting process, connect the two ends of the rotary joint to the nitrogen output pipeline and the equipment that needs to transport nitrogen respectively.
[0013] The rotating mechanism includes a first bearing and a second bearing. The first bearing is a fixed end and the second bearing is a floating end. During the use of the rotary joint, affected by the high temperature of the working environment, the first bearing and the second bearing will have axial expansion. When the second bearing expands to a certain extent, the inner ring of the second bearing will press against the boss on the surface of the sleeve, and the outer ring of the second bearing will press against the snap ring, so that the second bearing becomes a fixed end. The expansion force will be transmitted to the first bearing through the spacer sleeve. The first bearing expands to the left. At this time, under the action of the corrugated spring, the first bearing moves within the elastic deformation range of the corrugated spring and becomes a floating end, ensuring that the rotary joint can be used normally, enabling the first bearing and the second bearing to still rotate in a high-temperature environment, and increasing the service life of the rotary joint.
[0014] A sealing sleeve is sleeved on the sleeve at the left end of the rotating mechanism. The sealing sleeve is tightly connected to the sleeve. The right end of the sealing sleeve is connected to the left end of the rotating mechanism. A first skeleton oil seal is arranged outside the sealing sleeve. The sealing sleeve cooperates with the first skeleton oil seal to play a role of double sealing. At the same time, the sealing sleeve presses against the first bearing. When the first bearing expands to the left under the force of thermal expansion and the wave spring is compressed to the limit, the force of the first bearing expanding to the left will be transmitted to the sealing sleeve. When the thermal expansion force is greater than the frictional force between the sealing sleeve and the sleeve, the sealing sleeve will move to the left under the action of the thermal expansion force, providing a rotatable space for the first bearing, avoiding the jamming of the first bearing, and ensuring the normal use of the rotary joint.
[0015] The first skeleton oil seal and the second skeleton oil seal can fix their own positions through the supporting force of the internal skeleton, and there is no need to additionally install a baffle to prevent the oil seal from falling off.
[0016] The beneficial effects of the present utility model are as follows:
[0017] The structure of the present utility model is simple and convenient to use. By setting the wave washer and the sealing ring, the rotary joint can still be used normally in a high-temperature working environment, increasing the service life of the rotary joint, saving production costs, improving production efficiency, and avoiding the problem that the chlorine transmission pipeline is wound due to the abnormal rotation of the rotary joint. Description of the Drawings
[0018] Figure 1 It is a sectional view schematic diagram of the present utility model.
[0019] Markings in the figure: 1. Sleeve; 2. Sealing ring; 3. Rotating mechanism; 31. First bearing; 32. Second bearing; 33. Spacer sleeve; 4. Elastic retaining ring; 5. Sealing sleeve; 6. Wave washer; 7. Oil seal assembly; 71. First skeleton oil seal; 72. Second skeleton oil seal; 8. Housing. Detailed Description of the Invention
[0020] The following further elaborates on the specific embodiments of the present utility model in conjunction with the accompanying drawings.
[0021] As shown in the figure, a rotary joint for an aluminum melting and casting process includes a sleeve 1. The sleeve 1 is cylindrical and has a circular through-hole in the middle. There are two rubber seals 2 provided inside the right end of the sleeve 1. A boss is provided at the middle and rear end outside the sleeve 1. The middle outside of the sleeve 1 is connected to a rotating mechanism 3. The rotating mechanism 3 includes a first bearing 31 and a second bearing 32. The lower right side of the first bearing 31 is connected to the left side of a spacer sleeve 33. The right side of the spacer sleeve 33 is connected to the lower left side of the second bearing 32. The upper right side of the second bearing 32 is connected to a snap ring 4 sleeved outside the sleeve 1. The lower right side of the second bearing 32 is connected to the boss at the middle and rear end of the sleeve 1. A seal sleeve 5 is sleeved on the sleeve 1 at the left end of the first bearing 31. The seal sleeve 5 is tightly connected to the sleeve 1. The right end of the seal sleeve 5 is connected to the lower left side of the first bearing 31. A corrugated washer 6 is sleeved outside the right end of the seal sleeve 5. The right end of the corrugated washer 6 is connected to the upper left side of the first bearing 31. An oil seal assembly 7 is sleeved outside the seal sleeve 5 at the left end of the corrugated washer 6 and on the rear end of the sleeve 1. The oil seal assembly 7 includes a first skeleton oil seal 71 and a second skeleton oil seal 72. The first skeleton oil seal 71 is sleeved outside the seal sleeve 5 at the left end of the corrugated washer 6 and is connected to the seal sleeve 5. The second skeleton oil seal 72 is sleeved on the sleeve 1 at the right end of the snap ring 4. An outer shell 8 is sleeved outside the oil seal assembly 7, the corrugated washer 6, the rotating mechanism 3, and the snap ring 4. The left end of the outer shell 8 extends outward with an annular boss. The left and right ends inside the outer shell 8 are connected to the oil seal assembly 7. Inside the middle of the outer shell 8, there are successively arranged from left to right the corrugated washer 6, the rotating mechanism 3, and the snap ring 4. The outer ring of the snap ring 4 is arranged in a groove opened inside the rear end of the outer shell 8.
[0022] When using this rotary joint for the aluminum melting and casting process, connect the two ends of the rotary joint to the nitrogen output pipeline and the equipment that needs to transport nitrogen respectively. The structure of the utility model is simple and easy to use. By setting the corrugated washer and the seal ring, the rotary joint can still be used normally in a high-temperature working environment, increasing the service life of the rotary joint, saving production costs, improving production efficiency, and avoiding the problem that the chlorine transmission pipeline is wound due to the abnormal rotation of the rotary joint.
Claims
1. A rotary joint for aluminum casting process, comprising a sleeve, the sleeve is cylindrical, a circular through hole is opened in the middle, a sealing ring is provided on the inner side of the right end of the sleeve, and a boss is provided on the middle and rear end of the outer side of the sleeve, characterized in that: The middle outer part of the sleeve is connected to the rotating mechanism, the upper right part of the rotating mechanism is connected to the elastic retaining ring sleeved on the outside of the sleeve, the lower right part of the rotating mechanism is connected to the boss at the middle and rear end of the sleeve, a sealing sleeve is sleeved on the sleeve at the left end of the rotating mechanism, the sealing sleeve is tightly connected to the sleeve, the right end of the sealing sleeve is connected to the lower left part of the rotating mechanism, a corrugated washer is sleeved on the right end of the outer side of the sealing sleeve, the right end of the corrugated washer is connected to the upper left part of the rotating mechanism, an oil seal assembly is sleeved on the outer side of the sealing sleeve at the left end of the corrugated washer and the rear end of the sleeve, and an outer shell is sleeved on the oil seal assembly, the corrugated washer, the rotating mechanism and the elastic retaining ring.
2. The rotary joint for aluminum casting process according to claim 1, characterized in that: The rotating mechanism includes a first bearing and a second bearing. The lower right part of the first bearing is connected to the left side of the spacer sleeve, the right side of the spacer sleeve is connected to the lower left part of the second bearing, and the lower right part of the second bearing is connected to the boss at the middle and rear end of the sleeve.
3. The rotary joint for aluminum casting process according to claim 1, characterized in that: The oil seal assembly comprises a first skeleton oil seal and a second skeleton oil seal. The first skeleton oil seal sleeve is arranged outside the sealing sleeve at the left end of the wave washer and connected to the sealing sleeve. The second skeleton oil seal sleeve is arranged on the sleeve at the right end of the elastic retaining ring.
4. The rotary joint for aluminum casting process according to claim 1, characterized in that: An annular boss extends outward from the left end of the shell, and the interior of the left end and the right end of the shell are connected to the oil seal assembly. A wave washer, a rotating mechanism and an elastic retaining ring are arranged in the middle interior of the shell from left to right, and the outer ring of the elastic retaining ring is arranged in a groove opened on the inner side of the rear end of the shell.
5. The rotary joint for aluminum casting process according to claim 1, characterized in that: The sealing rings are made of rubber and there are two of them.