Oil lubrication high-speed jet mill transmission shaft system for high-temperature environment working condition

Abstract

An oil lubrication high-speed jet mill transmission shaft system used for high-temperature environment working conditions comprises a transmission shaft body, and a heat dissipation structure is arranged on the transmission shaft body. According to the oil lubrication high-speed jet mill transmission shaft system for the high-temperature environment working condition, an efficient and synergistic heat management and sealing protection system is constructed through a heat dissipation structure, an integrated annular water cooling cavity, high-temperature-resistant oil bath lubrication and a three-stage combined sealing system; the annular forced water cooling channel can directly and efficiently take away friction heat and external radiant heat of the bearing, and it is ensured that the working temperature of the bearing is stably maintained within a safe range; secondly, the total-synthesis high-temperature-resistant lubricating oil assists in heat dissipation while forming a reliable lubricating film, and forms a dual heat control mechanism with an external cooling system; thirdly, a multi-stage sealing system formed by the mechanical barrier, the positive pressure air curtain and the rotary seal solves the problems of lubricating oil leakage and dust invasion under the high-temperature working condition; and long-term stable operation in a high-speed and high-temperature severe environment is integrally realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of superfine powder processing equipment, and particularly relates to an oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions. BACKGROUND

[0002] Under the double tests of high-speed rotation and high-temperature environment, the heat generated by the bearing assembly due to continuous friction can quickly accumulate, and if it cannot be effectively discharged in time, it is easy to cause problems such as temperature rise, lubrication failure and even equipment jamming. Especially in the harsh working conditions of continuous crushing of high-temperature superfine powder materials, the heat management of the bearing has become a key factor determining the stability and service life of the equipment.

[0003] At present, the common cooling methods in the industry mainly include water cooling and natural air cooling, but compared with the more efficient oil cooling system, these two types of solutions have their own limitations. Although the water cooling system has high cooling efficiency, it is prone to pipe scaling, high corrosion risk and water vapor condensation in high-temperature areas, and long-term use may affect the cooling stability and equipment safety; and the natural air cooling method has simple structure and convenient maintenance, but its heat dissipation capacity is significantly affected by the ambient temperature, and in high-temperature workshops or continuous high-load working conditions, it is often difficult to meet the needs of bearing continuous heat dissipation, which may lead to heat accumulation and affect the reliability of the shaft system.

[0004] INVENTION CONTENT In order to solve the above problems existing in the prior art, the application aims to provide an oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions.

[0005] The technical scheme adopted by the application is as follows: An oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions, comprising a transmission shaft body, wherein a heat dissipation structure is arranged on the transmission shaft body, the heat dissipation structure comprises a cylinder shell, bearings are arranged on the cylinder shell, an oil inlet is arranged on the cylinder shell, an oil outlet is arranged on the cylinder shell, a liquid inlet is arranged on the cylinder shell, a liquid outlet is arranged on the cylinder shell, an annular cooling chamber is arranged on the cylinder shell, a rotary seal is arranged on the cylinder shell, a first gas seal cover is arranged on the cylinder shell, a second gas seal cover is arranged on the cylinder shell, an air inlet hole is arranged on the second gas seal cover, and an overflow hole is arranged on the cylinder shell.

[0006] Preferably, a baffle is arranged in the cylinder shell.

[0007] Preferably, the rotary seal comprises two Teflon high-temperature double-lip rotary oil seals and one Teflon high-temperature double-lip rotary gas seal.

[0008] Preferably, the transmission shaft body is provided with a groove.

[0009] Preferably, the shell cylinder is provided with a measuring hole.

[0010] Preferably, the shell cylinder is provided with a mounting hole.

[0011] The beneficial effects of the present patent are: the present patent is an oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions. Through the heat dissipation structure, the present scheme integrates an annular water cooling cavity, high-temperature-resistant oil bath lubrication, and a three-stage combined sealing system to build an efficient and collaborative heat management and sealing protection system. The core beneficial effects are: first, the annular forced water cooling channel can directly and efficiently remove bearing friction heat and external radiation heat, ensuring that the bearing working temperature is stably maintained within a safe range; second, the all-synthetic high-temperature-resistant lubricating oil forms a reliable lubricating film while assisting in heat dissipation, forming a double heat control mechanism with the external cooling system; third, the multi-stage sealing system composed of mechanical barriers, positive pressure air curtains, and rotating seals solves the problems of lubricating oil leakage and dust intrusion under high-temperature working conditions; fourth, the system components are specially selected and cooperatively designed based on high-temperature working conditions, achieving long-term stable operation in high-speed high-temperature harsh environments, significantly improving equipment reliability, extending maintenance cycles, and ensuring the stability of continuous production. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present patent will be further described in detail below in combination with the drawings and specific implementation methods.

[0013] Fig. 1 is a partial cross-sectional structural schematic diagram of the present patent, a kind of oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions; Fig. 2 is a cross-sectional structural schematic diagram of the present patent, a kind of oil-lubricated high-speed airflow mill transmission shaft system for high-temperature environment working conditions; In the figure: 1, transmission shaft body, 2, cylinder shell, 3, oil inlet, 4, oil outlet, 5, liquid inlet, 6, liquid outlet, 7, bearing, 8, annular cooling chamber, 9, mounting hole, 10, groove, 11, rotating seal, 12, air inlet hole, 13, first gas seal cover, 14, baffle, 15, overflow hole, 16, measuring hole, 17, second gas seal cover. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the present application patent more clear and understandable, the present application patent will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application patent and are not used to limit the present application patent, i.e., the described examples are only a part of the examples of the present application patent, but not all the examples. The components of the present application patent embodiments generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present application patent provided in the drawings is not intended to limit the scope of the claimed present application patent, but only represents selected embodiments of the present application patent. Based on the embodiments of the present application patent, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application patent.

[0016] The following detailed description of the embodiments of the present application patent provided in the drawings is not intended to limit the scope of the claimed present application patent, but only represents selected embodiments of the present application patent. Based on the embodiments of the present application patent, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application patent. Figs. 1-2The specific embodiment of the patent is described as follows: a transmission shaft system for oil lubricated high-speed airflow mill in high temperature environment, comprising a transmission shaft body 1, a heat dissipation structure is arranged on the transmission shaft body 1, the heat dissipation structure comprises a cylinder shell 2, a bearing 7 is arranged on the cylinder shell 2, an oil inlet 3 is arranged on the cylinder shell 2, an oil outlet 4 is arranged on the cylinder shell 2, a liquid inlet 5 is arranged on the cylinder shell 2, a liquid outlet 6 is arranged on the cylinder shell 2, an annular cooling chamber 8 is arranged on the cylinder shell 2, a rotary seal 11 is arranged on the cylinder shell 2, a first gas seal cover 13 is arranged on the cylinder shell 2, a second gas seal cover 17 is arranged on the cylinder shell 2, an air inlet hole 12 is arranged on the second gas seal cover 17, an overflow hole 15 is arranged on the cylinder shell 2, the oil inlet 3 can exhaust air, when heat dissipation is needed, cooling water flows into the annular cooling chamber 8 in the inside of the cylinder shell 2 from the liquid inlet 5 on the cylinder shell 2, and it is ensured that the cooling water can flow out of the liquid outlet 6 smoothly, a forced circulation cooling passage is established, the liquid inlet 5 and the liquid outlet 6 are connected to an external circulation cooling system, the oil inlet 3 at the top of the cylinder is opened, specified full synthetic high temperature resistant lubricating oil is added to the inside cavity of the cylinder until the oil overflows from the side overflow hole, which indicates that the oil level has reached the designed height, at this time, the overflow hole plug and the oil inlet 3 are tightened, at the same time, the clean gas source of the external gas seal system is connected and opened, low pressure compressed air or inert gas is introduced into the air inlet hole 12 on the cylinder shell 2, the gas passes through the uniformly distributed holes in the annular gas seal cover to form a stable positive pressure gas curtain barrier around the shaft. Finally, manual turning is carried out to confirm that the transmission shaft rotates flexibly without jamming, the driving motor is started, and the transmission shaft body 1 is driven to rotate by the belt. The speed of the transmission shaft body 1 stably rises to the working speed, in the lubrication system, the lubricating oil in the oil bath is taken up and splashed by the rotating transmission shaft body 1 and the bearing 7, the inside angular contact ball bearing 7 and the roller bearing 7 are fully lubricated, a protective oil film is formed, and the bearing 7 starts to absorb the friction heat generated by the operation. In the cooling system, the cooling water continuously circulating in the annular cooling chamber 8 efficiently absorbs and removes two parts of the key heat: one is the internal friction heat transferred from the lubricating oil and the bearing 7; the other is the external radiation heat transferred from the high temperature mill cavity through the cylinder, the first gas seal cover 13 physically blocks large particle dust, the positive pressure gas curtain continuously blown out of the air inlet hole 12 on the second gas seal cover 17 effectively blocks fine dust from further invading and assists in isolating hot air flow, the rotary seal 11 ensures that the lubricating oil in the bearing 7 cavity does not leak outwards and prevents external impurities from finally entering. Under the synergistic effect, the system heat input and cooling output reach a dynamic balance.

[0017] Beneficially, the cylinder shell 2 is provided with a baffle 14, which can effectively block the oil splashing caused by high-speed rotating parts, prevent the lubricating oil from abnormally escaping from the oil inlet 3 or the sealing gap due to centrifugal effect, thereby ensuring stable oil level and reliable continuous lubrication, and reducing pollution and loss caused by oil mist overflow.

[0018] Beneficially, the rotating seal 11 comprises two Teflon high-temperature double-lip rotating oil seals and one Teflon high-temperature double-lip rotating gas seal. Through the synergy of the oil seal and the gas seal, the design realizes efficient sealing of the lubricating oil in the bearing 7 cavity under high-speed rotating conditions, effectively prevents the leakage of lubricating medium, and at the same time blocks the intrusion of external dust, water vapor and other impurities, ensuring the internal cleanliness of the transmission cavity and the long-term stable operation of the lubrication system.

[0019] Beneficially, recesses 10 are provided on the transmission spindle, which form periodic geometric features with the surface of the shaft body, converting the rotational motion of the shaft into continuous and stable electric pulse signals, and further realizing real-time and accurate detection and monitoring of the rotational speed of the transmission shaft, providing key data for equipment operation control and state diagnosis. Beneficially, the housing cylinder is provided with a measuring hole 16, which is precisely positioned and processed and is specially designed to fit a non-contact rotational speed sensor. The mounting hole 9 and the recess 10 on the transmission shaft are strictly aligned to ensure that the sensor can accurately capture the periodic pulse signals generated when the shaft body rotates, thereby realizing high-precision and real-time speed monitoring and providing reliable data support for equipment operation state analysis and control system feedback.

[0020] Beneficially, the housing cylinder is provided with a mounting hole 9, which is optimally designed to facilitate the stable installation of platinum resistance and other contact type temperature sensor probes. The sensor can directly approach or contact the surface of the housing in the outer ring area of the bearing 7 through this mounting hole 9, thereby monitoring the working temperature of the bearing 7 in real time and accurately, and transmitting the signal to the control system to realize continuous monitoring and overheating protection of the bearing 7.

[0021] Working principle of the present application: When the heat needs to be dissipated, the cooling water flows into the annular cooling chamber 8 from the inlet 5 on the cylinder shell 2 and ensures that it can flow out smoothly from the outlet 6, establishing a forced circulation cooling passage, the inlet 5 and the outlet 6 are connected to the external circulation cooling system, the oil inlet 3 on the top of the cylinder is opened, the designated full synthetic high-temperature resistant lubricating oil is added to the internal chamber of the cylinder until the oil overflows from the side oil overflow hole, indicating that the oil level has reached the designed height, at this time, the oil overflow hole screw plug and the oil inlet 3 are tightened, at the same time, the clean gas source of the external air seal system is connected and opened, low-pressure compressed air or inert gas is introduced into the air inlet hole 12 on the cylinder shell 2, the gas passes through the uniformly distributed holes in the annular air seal cover and forms a stable positive pressure air curtain barrier around the shaft. Finally, manual cranking is performed to confirm that the transmission shaft rotates smoothly without jamming, the drive motor is started, and the transmission shaft body 1 is driven to rotate by the belt. The transmission shaft body 1 rotates smoothly to the working speed, the lubricating oil in the oil bath is brought up and splashed by the rotating transmission shaft body 1 and the bearing 7, fully lubricating the internal angular contact ball bearing 7 and roller bearing 7, forming a protective oil film and starting to absorb the friction heat generated by the bearing 7. In the cooling system, the continuously circulating cooling water in the annular cooling chamber 8 efficiently absorbs and removes two parts of the key heat: one is the internal friction heat transferred from the lubricating oil and the bearing 7; the other is the external radiation heat conducted from the high-temperature grinding cavity through the cylinder, the first air seal cover 13 physically blocks large particles of dust, the positive pressure air curtain continuously blown out of the air inlet hole 12 on the second air seal cover 17 effectively blocks fine dust from further entering and assists in isolating hot air flow, the rotary seal 11 ensures that the lubricating oil in the bearing 7 chamber does not leak outwards and prevents external impurities from entering. Under the synergistic effect of the above, the system heat input and cooling output reach a dynamic balance.

[0022] In the description of the present patent, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0023] The above is only an example and description of the structure of the present patent, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present patent or exceed the scope defined by the present claims, they should belong to the protection scope of the present patent.

Claims

1. A transmission shaft system for an oil-lubricated high-speed airflow mill used in high-temperature environments, comprising a transmission shaft body (1), characterized in that, The transmission shaft 1 is provided with a heat dissipation structure, which includes a cylindrical shell (2), a bearing (7) on the cylindrical shell (2), an oil inlet (3) on the cylindrical shell (2), an oil outlet (4) on the cylindrical shell (2), a liquid inlet (5) on the cylindrical shell (2), a liquid outlet (6) on the cylindrical shell (2), an annular cooling chamber (8) on the cylindrical shell (2), a rotary seal (11) on the cylindrical shell (2), a first air seal cover (13) on the cylindrical shell (2), a second air seal cover (17) on the cylindrical shell (2), an air inlet (12) on the second air seal cover (17), and an overflow hole (15) on the cylindrical shell (2).

2. The transmission shaft system for an oil-lubricated high-speed airflow mill in a high-temperature environment according to claim 1, characterized in that, The outer shell (2) of the cylindrical body is provided with a baffle (14).

3. The transmission shaft system for an oil-lubricated high-speed airflow mill in a high-temperature environment according to claim 1, characterized in that, The rotary seal (11) includes two Teflon high-temperature resistant double-lip rotary oil seals and one Teflon high-temperature resistant double-lip rotary gas seal.

4. The transmission shaft system for an oil-lubricated high-speed airflow mill in a high-temperature environment according to claim 1, characterized in that, The drive shaft 1 is provided with a groove (10).

5. The transmission shaft system for an oil-lubricated high-speed airflow mill in a high-temperature environment according to claim 1, characterized in that, The outer shell is provided with a measuring hole (16).

6. The transmission shaft system for an oil-lubricated high-speed airflow mill in a high-temperature environment according to claim 1, characterized in that, The outer shell is provided with mounting holes (9).

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