Cooling sealing device for high-temperature shaft
By designing a cooling and sealing device for high-temperature shafts and utilizing structures such as sleeves, inner shells, outer shells, and insulation blocks, the problems of cylinder wear and seal leakage caused by high-temperature exhaust gas in chemical environmental protection equipment are solved, and effective cooling and lubrication of the main shaft are achieved, ensuring stable operation of the equipment.
Patent Information
- Application Number
- CN202422818497.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-19
AI Technical Summary
High-temperature exhaust gas from chemical environmental protection equipment causes cylinder wear, lubricating grease failure, and thermal expansion and contraction, resulting in seal leakage and unstable equipment operation, affecting equipment life and maintenance costs.
A cooling and sealing device for high-temperature shafts was designed, which includes a sleeve, inner shell, outer shell, air chamber, grease chamber and insulation block. High-pressure gas is used to isolate exhaust gas leakage, circulating water is used to cool the main shaft, and ceramic fiber material is used to reduce heat conduction to ensure the lubrication and sealing effect of the main shaft.
Effectively isolate exhaust gas leakage, keep the spindle cool, avoid cylinder overheating, extend equipment life, reduce maintenance costs, and improve operational stability.
Smart Images
Figure CN223359908U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cooling devices, and in particular to a cooling and sealing device for a high-temperature shaft. Background Art
[0002] Regenerative incinerators for chemical and environmental protection equipment typically use ambient air as the inlet air. However, some processes require high-temperature exhaust gas, around 300°C. Furthermore, the confluence of multiple exhaust streams into the main pipeline can cause unstable inlet air temperatures. While the incinerator itself can be insulated with thermal insulation, heat transfer from the valve shaft to the cylinder is inevitable. Ordinary cylinders are typically operated below 60°C, and high temperatures can damage them.
[0003] Cylinders have many moving parts, which gradually wear out during operation and require regular maintenance. Using thermal insulation would greatly increase maintenance inconvenience. The spindle seals gradually wear out during operation, and excessively high temperatures can cause lubricant grease to lose effectiveness, exacerbating wear. Alternatively, using high-temperature grease would increase operating costs. Furthermore, excessive temperature differences exacerbate thermal expansion and contraction, leading to excessive shaft clearances and potentially leaking harmful exhaust gases from the regenerative incinerator into the working environment. Therefore, a new solution to these technical challenges is urgently needed. Summary of the Invention
[0004] To solve the above problems, the present invention discloses a high-temperature shaft cooling and sealing device, comprising an equipment support, a cooling and sealing mechanism fixedly connected to the equipment support, a bracket fixedly connected to the other end of the cooling and sealing mechanism, a cylinder fixedly connected to the other side of the bracket, a main shaft extending through the middle of the cooling and sealing mechanism, the main shaft end and the output end of the cylinder fixedly connected to a flange, the cooling and sealing mechanism comprising a sleeve, both ends of the sleeve fixedly connected to an inner shell, and the main shaft extending through the middle of the sleeve and the inner shell, the interior of the sleeve being divided into an air chamber and a grease chamber, an outer shell sleeved on the outer side of the sleeve, the side walls of the outer shell fixedly connected to a water inlet pipe and a water outlet pipe. During the operation of the main shaft, the high temperature causes the grease and other substances attached to the main shaft surface to vaporize, and the air chamber is provided to accommodate the vaporized substances, while the grease chamber is used to continuously replenish the grease for the main shaft to ensure the smooth operation of the main shaft. In addition, a water chamber is provided between the inner shell and the outer shell, and the water in the water chamber is continuously circulated and renewed through the water inlet pipe and the water outlet pipe to ensure the cooling of the main shaft.
[0005] The inner shell is provided with packing, which is sleeved on the side wall of the main shaft, and the end of the inner shell is fixedly connected with a gland. The gland presses against the packing to limit the position, while the packing acts as a seal.
[0006] Preferably, an air inlet pipe is fixedly connected to the side wall of the sleeve, and the air inlet pipe is in communication with the air chamber. The air inlet pipe injects high-pressure gas to maintain the pressure of the air chamber and prevent leakage of exhaust gas generated during operation.
[0007] Preferably, the side wall of the sleeve is fixedly connected with an oil filling pipe, which is communicated with the butter chamber. The butter chamber is replenished with butter through the oil filling pipe.
[0008] Preferably, both ends of the housing are fixedly connected with end flanges, and the equipment support and the bracket are fixedly connected to the cooling sealing mechanism through the end flanges. First, the fixed connection of the components at both ends of the cooling sealing mechanism is performed.
[0009] Preferably, a heat insulating block is provided between the main shaft and the output end of the cylinder to reduce heat conduction from the output end of the cylinder into the cylinder, thereby avoiding problems such as reduced control accuracy and shortened service life.
[0010] Preferably, the insulation block and packing are both made of ceramic fiber. Ceramic fiber has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, low specific heat, and resistance to mechanical vibration. Therefore, it has been widely used in industries such as machinery, metallurgy, chemical industry, petroleum, ceramics, glass, and electronics.
[0011] The beneficial effects of the present invention are as follows:
[0012] 1. An air chamber and an air inlet pipe are provided. By injecting high-pressure gas into the air inlet pipe, the gasified waste gas from the spindle operation or the waste gas treated by the chemical environmental protection equipment is isolated to avoid leakage and improve the working environment.
[0013] 2. The shell, water inlet pipe, water outlet pipe and other structures are provided so that the water chamber inside the shell is constantly updated with water, thereby ensuring the normal cooling of the main shaft.
[0014] 3. It is equipped with an outer shell, an inner shell, packing and a heat insulation block to prevent the heat on the main shaft from being transferred to the cylinder, ensuring the stable and long-term operation of the cylinder, which is beneficial to the long-term operation of the chemical environmental protection equipment and avoids losses to the enterprise due to shutdown of the chemical environmental protection equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0016] Figure 2 It is a schematic diagram of the cooling and sealing mechanism of the present invention.
[0017] List of reference numerals:
[0018] 1. Equipment support; 2. Cooling and sealing mechanism; 3. Bracket; 4. Spindle; 5. Heat insulation block; 6. Cylinder;
[0019] 21. End flange; 22. Inner shell; 23. Outer shell; 24. Sleeve; 25. Air chamber; 26. Grease chamber; 27. Water inlet pipe; 28. Gland; 29. Water outlet pipe; 210. Air inlet pipe; 211. Oil filling pipe. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.
[0021] like Figures 1 to 2 As shown, a cooling and sealing device for a high-temperature shaft includes an equipment support 1, which is fixedly connected to the side wall of the chemical environmental protection equipment. A cooling and sealing mechanism 2 is fixedly connected to the equipment support 1. Since the operating temperature of the chemical environmental protection equipment is as high as 300°C, a cooling and sealing mechanism 2 is required. The other end of the cooling and sealing mechanism 2 is fixedly connected to a bracket 3, and the other side of the bracket 3 is fixedly connected to a cylinder 6. The bracket 3 is used to support and fix the cylinder 6. The bracket 3 is a cylindrical member with an opening on the side wall of the cylindrical member. On the one hand, it is convenient for heat dissipation. On the other hand, it is convenient for maintenance and repair, such as replacing the cylinder 6 and checking the wear of components. A main shaft 4 is provided through the middle of the cooling and sealing mechanism 2. The temperature of the main shaft 4 needs to be reduced to below 60°C. The end of the main shaft 4 and the output end of the cylinder 6 are fixedly connected to a flange. Furthermore, a floating joint is fixedly connected to the output end of the cylinder 6. The floating joint compensates for temperature effects or installation errors in the device to ensure the assembly of various components. A flange is provided at one end of the floating joint. The flange at the end of the main shaft 4 and the flange on the floating joint are fixed by bolts and nuts.
[0022] The cooling sealing mechanism 2 includes a sleeve 24. The sleeve 24 is a cylindrical structure and is located at the center of the main cooling sealing mechanism 2. Both ends of the sleeve 24 are fixedly connected to the inner shell 22. The inner shell 22 is a pipe fitting and is provided with two. The main shaft 4 passes through the middle of the sleeve 24 and the inner shell 22, that is, the sleeve 24 and the inner shell 22 are both sleeved on the main shaft 4. The interior of the sleeve 24 is divided into an air chamber 25 and a butter chamber 26. The air chamber 25 is used to accommodate the gas generated under high temperature operation, and the butter chamber 26 stores butter. When the main shaft 4 moves axially, the air chamber 25 is used to store butter. During the process, grease is applied to the side wall of the main shaft 4 to achieve the purpose of lubrication, and the grease chamber 26 allows the main shaft 4 to be continuously lubricated, but the quality requirements of the grease are not high. The outer side of the sleeve 24 is sleeved with the outer shell 23, and the outer shell 23, the sleeve 24 and the inner shell 22 are a water chamber. The side wall of the outer shell 23 is fixedly connected with a water inlet pipe 27 and a water outlet pipe 29. Cooling water is fed in through the water inlet pipe 27, and the water outlet pipe 29 is used to send out heated water and continuously update the water in the water chamber to ensure that the temperature of the main shaft 4 drops below 60°C after cooling.
[0023] A packing is provided inside the inner shell 22, and the packing is sleeved on the side wall of the main shaft 4, that is, the packing plays a sealing role here. The end of the inner shell 22 is fixedly connected to a pressure cover 28, and the pressure cover 29 is fixedly connected to the inner shell 22 by bolts to press the packing to ensure the sealing effect. At the same time, the grease provided is used to lubricate between the packing and the main shaft 4, thereby reducing the wear of the main shaft 4.
[0024] An air inlet pipe 210 is fixedly connected to the side wall of the sleeve 24, and the air inlet pipe 210 is connected to the air chamber 25. When the device is operating, high-pressure gas is injected into the air chamber 25 through the air inlet pipe 210, which can be higher than the pressure inside the air chamber 25, usually 5kPa to 10kPa, to isolate the exhaust gas to avoid leakage and improve the quality of the working environment.
[0025] An oil filling pipe 211 is fixedly connected to the side wall of the sleeve 24 . The oil filling pipe 211 is in communication with the grease chamber 26 , and grease is replenished into the grease chamber 26 through the oil filling pipe 211 .
[0026] Both ends of the housing 23 are fixedly connected with end flanges 21 , and the equipment support 1 and the bracket 3 are fixedly connected to the cooling sealing mechanism 2 through the end flanges 21 .
[0027] An insulation block 5 is provided between the output ends of the main shaft 4 and the cylinder 6. The insulation block 5 reduces the heat conduction between the main shaft 4 and the cylinder 6. When the cooling sealing mechanism 2 fails, the main shaft insulation device will delay the time for high temperature to be conducted to the cylinder, reserving sufficient time for discovering and eliminating the fault, thereby avoiding greater losses.
[0028] The heat insulation block 5 and the packing are both made of ceramic fiber. Ceramic fiber has excellent high temperature resistance.
[0029] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.
Claims
1. A cooling and sealing device for a high-temperature shaft, comprising an equipment support (1), a cooling and sealing mechanism (2) fixedly connected to the equipment support (1), a bracket (3) fixedly connected to the other end of the cooling and sealing mechanism (2), a cylinder (6) fixedly connected to the other side of the bracket (3), a main shaft (4) passing through the middle of the cooling and sealing mechanism (2), an end of the main shaft (4) and an output end of the cylinder (6) fixedly connected to a flange, characterized in that: The cooling sealing mechanism (2) comprises a sleeve (24), both ends of the sleeve (24) are fixedly connected to the inner shell (22), and the main shaft (4) passes through the sleeve (24) and the middle of the inner shell (22), the interior of the sleeve (24) is divided into an air chamber (25) and a butter chamber (26), the outer side of the sleeve (24) is sleeved with the outer shell (23), and the side wall of the outer shell (23) is fixedly connected to the water inlet pipe (27) and the water outlet pipe (29); A packing is provided inside the inner shell (22), and the packing is sleeved on the side wall of the main shaft (4). A gland (28) is fixedly connected to the end of the inner shell (22).
2. A high-temperature shaft cooling and sealing device according to claim 1, characterized in that: An air intake pipe (210) is fixedly connected to the side wall of the sleeve (24), and the air intake pipe (210) is in communication with the air chamber (25).
3. The high-temperature shaft cooling and sealing device according to claim 1, characterized in that: An oil filling pipe (211) is fixedly connected to the side wall of the sleeve (24), and the oil filling pipe (211) is in communication with the butter chamber (26).
4. The high-temperature shaft cooling and sealing device according to claim 1, characterized in that: Both ends of the housing (23) are fixedly connected to end flanges (21), and the equipment support (1) and the bracket (3) are fixedly connected via the end flanges (21) and the cooling sealing mechanism (2).
5. The high-temperature shaft cooling and sealing device according to claim 1, characterized in that: A heat insulation block (5) is provided between the main shaft (4) and the output end of the cylinder (6).
6. The high-temperature shaft cooling and sealing device according to claim 5, characterized in that: The thermal insulation block (5) and the packing are both made of ceramic fiber material.