Single-shaft double-screw mixer stirring shaft oiling device

Abstract

The utility model discloses a single -shaft double helical ribbon mixing machine stirring shaft oiling device relates to spare and parts lubrication technical field, including the seal shell, is used for sealing sleeve and is connected in the oiling part of stirring shaft, the upper end threaded connection of seal shell has the oil bottle filled with lubricating oil, the upper end threaded connection of oil bottle has the cover, the gas cylinder, is connected in the upper end of cover, the inside sealed sliding of gas cylinder has the piston, the upper end of chuck has the support for supporting the support of gas cylinder, the upper end of gas cylinder is provided with the air hole, the piston is slid down for the gas in the gas cylinder is delivered to the oil bottle in through self -gravity, pressurizes to the inside of oil bottle, promotes the lubricating oil to enter the rotary joint of stirring shaft, has solved the single -shaft double helical ribbon mixing machine of current dependence gravity flow lubrication system and cannot respond change quickly, can cause lubricating oil supply lag, and the problem of uneven distribution of oil, poor supply stability.

Description

Technical Field

[0001] This utility model relates to the field of component lubrication technology, specifically to an oiling device for the stirring shaft of a single-shaft double-ribbon mixer. Background Technology

[0002] The single-shaft double-ribbon mixer is a commonly used mixing equipment in the chemical, food, and pharmaceutical industries. Its main function is to efficiently and uniformly mix materials such as powders, granules, and viscous liquids. The equipment consists of a single shaft and two opposing rotating ribbons, which are typically mounted on the shaft and rotate around its center at a certain angle. The unique design of the ribbons allows the material to flow and shear in different directions during the mixing process, thus achieving uniform mixing.

[0003] Because the rotating parts of the mixer shaft (such as the bearing and gear connection) generate high temperatures and wear during rotation, it is necessary to install an oil bottle at the rotating connection. The oil bottle is filled with lubricating oil, which flows to the connection of the mixing shaft by gravity, and then the oil is distributed by the centrifugal force generated by the rotating connection to ensure that the lubricating oil can cover the surface of the bearing and gear during rotation.

[0004] However, the existing single-shaft double-ribbon mixers rely on gravity flow lubrication systems that cannot respond quickly to changes, resulting in delayed lubricant supply, uneven oil distribution, and poor supply stability. To solve the above-mentioned problems, an oiling device for the stirring shaft of a single-shaft double-ribbon mixer is provided. Utility Model Content

[0005] The purpose of this invention is to provide an oiling device for the stirring shaft of a single-shaft double-ribbon mixer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oiling device for the stirring shaft of a single-shaft double-ribbon mixer, comprising a sealing shell;

[0007] Used to seal the oiled part of the agitator shaft, the upper end of the sealing shell is threadedly connected to an oil bottle filled with lubricating oil, and the upper end of the oil bottle is threadedly connected to a cap.

[0008] The gas cylinder is threaded to the upper end of the cap. Inside the gas cylinder, a piston slides in a sealed manner. The piston slides downward to deliver the gas in the gas cylinder to the oil bottle and pressurize the inside of the oil bottle.

[0009] As a preferred technical solution of this utility model, a chuck is fixedly connected to the upper end of the sealing shell, and the oil bottle is threadedly connected to the upper end of the chuck.

[0010] As a preferred technical solution of this utility model, the upper end of the chuck is engaged with a bracket for supporting the gas cylinder.

[0011] As a preferred technical solution of this utility model, the upper end of the gas cylinder is provided with an air hole.

[0012] As a preferred technical solution of this utility model, a screw is fixedly connected to the upper end of the piston, the screw is slidably inserted into the upper end of the gas cylinder, and the screw extends from the upper end of the gas cylinder.

[0013] As a preferred embodiment of this utility model, the upper end of the screw extending out of the gas cylinder is threaded with a nut for fixing the piston.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the piston slides downwards under its own weight to transport gas from the gas cylinder to the oil cylinder, pressurizing the inside of the oil cylinder and promoting the entry of lubricating oil into the rotating connection of the stirring shaft. This solves the problem that the existing single-shaft double-ribbon mixer's gravity-flow-dependent lubrication system cannot respond quickly to changes, resulting in delayed lubricating oil supply, uneven oil distribution, and poor supply stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the oiling device on the stirring shaft according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the sealing shell according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the oil bottle and the gas cylinder according to an embodiment of the present utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of a gas cylinder according to an embodiment of the present invention.

[0020] In the diagram: 1. Sealing shell; 11. Chuck; 2. Oil bottle; 3. Cap; 4. Gas cylinder; 41. Air vent; 5. Piston; 51. Screw; 52. Nut; 6. Bracket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This embodiment provides an oiling device for the stirring shaft of a single-shaft double-ribbon mixer, including a sealing shell 1. The sealing shell 1 is used to seal the rotating parts of the stirring shaft (the connection between the bearings and gears). A chuck 11 is fixedly connected to the upper end of the sealing shell 1, and an oil bottle 2 is threadedly connected to the upper end of the chuck 11. A cap 3 is threadedly connected to the upper end of the oil bottle 2, and the cap 3 is used to seal the oil bottle 2. The oil bottle 2 is connected to the sealing shell 1 through the chuck 11. After the oil bottle 2 is connected to the chuck 11, lubricating oil is filled into the oil bottle 2. The lubricating oil in the oil bottle 2 will flow downwards under its own gravity into the sealing shell 1, and then flow into the gaps between the components of the stirring shaft inside the sealing shell 1 to lubricate the components.

[0023] During the installation of components within the sealing shell 1, lubricating oil is pre-filled into the gaps between the components. After the components are in operation, the lubricating oil will evaporate due to the increased temperature in high-temperature or high-speed operating environments. At this time, the lubricating oil in the oil bottle 2 can replenish the lubricating oil consumed in the sealing shell 1. The lower opening diameter of the oil bottle 2 is 3-5mm. The smaller opening can limit the flow rate of the oil bottle 2, preventing the lubricating oil in the oil bottle 2 from flowing out too quickly, thereby ensuring that the lubricating oil can flow evenly and stably to the critical parts of the stirring shaft. The smaller opening can also effectively avoid excessive flow of lubricating oil, reduce waste, and ensure that the lubricating oil forms a uniform oil film on the friction surfaces of bearings and gears, preventing overheating or wear caused by insufficient lubrication.

[0024] After the stirring shaft components rotate, they can further drive the flow of lubricating oil. However, some of the stirring shaft components have small clearances (such as between the bearing and the shaft, and between the bearing and the bearing housing), making it difficult for the lubricating oil to flow quickly into the gaps between these components for lubrication. Therefore, in order to increase the efficiency of lubricating oil entering the sealing shell 1, a pressure mechanism is provided at the upper end of the cover 3.

[0025] The pressurization mechanism includes a gas cylinder 4 and a piston 5. The gas cylinder 4 is threaded to the upper end of the cap 3, and the cap 3 has an opening through which the gas cylinder 4 communicates with the oil bottle 2 below. The piston 5 is slidably installed inside the gas cylinder 4 and is made of stainless steel with a high mass. The piston 5 slides downward under its own weight, compressing the air below it inside the gas cylinder 4. This air is then transported through the cap 3 to the oil bottle 2, pressurizing the inside of the oil bottle 2. As the air pressure above the lubricating oil in the oil bottle 2 increases, the continuous downward movement of the piston 5 gradually increases the air pressure compensation, forming a positive feedback regulation that promotes the entry of lubricating oil into the sealed shell 1.

[0026] An annular groove is formed on the outer wall of piston 5, through which a rubber ring can be fitted onto the outer wall of piston 5. The rubber ring increases the sealing performance of piston 5. At the same time, the rubber ring increases the damping force between the outer wall of piston 5 and the inner wall of gas cylinder 4, reducing the downward sliding speed of piston 5 and preventing excessive discharge of lubricant from oil bottle 2 due to rapid descent of piston 5. To ensure the sliding of piston 5, an air hole 41 is formed at the upper end of gas cylinder 4 to prevent the formation of negative pressure in the space above piston 5 inside gas cylinder 4, which would affect the downward movement of piston 5.

[0027] However, in actual operation, it was found that when installing gas cylinder 4, piston 5 inside gas cylinder 4 would slide down prematurely, prematurely expelling air from gas cylinder 4 and affecting the pressurization of oil cylinder 2. To fix piston 5 and prevent it from sliding down prematurely, a screw 51 is fixedly connected to the upper end of piston 5. For example... Figure 4 As shown, screw 51 is slidably inserted into the upper end of gas cylinder 4, and a nut 52 is threadedly connected to one end of screw 51 that extends slidably from the upper end of gas cylinder 4. The tightened nut 52 limits the piston 5 and prevents it from sliding down. After gas cylinder 4 is installed, the nut 52 is rotated off, and piston 5 can slide down to perform pressurization.

[0028] Even after the stirring shaft stops working, piston 5 will continue to pressurize, which can easily cause lubricating oil to leak from the gap between the stirring shaft and the sealing shell 1, affecting the use of the equipment. To prevent piston 5 from continuously pressurizing, an air pump can be connected to the upper end of the gas cylinder 4. Specifically, the air pump's outlet is connected to a connecting cap, which is threaded onto the upper end of the gas cylinder 4, covering the air hole 41. After the stirring shaft stops working, the air pump is started, generating suction to create a slight negative pressure at the upper end of piston 5. The generated negative pressure is close to the combined weight of piston 5 and screw 51, stabilizing piston 5 and preventing it from continuously moving downwards and pressurizing the oil bottle 2 after the stirring shaft stops working. The air pump's pipeline is equipped with an air valve. After negative pressure is generated at the upper end of piston 5, the air valve is closed to maintain the negative pressure state above piston 5.

[0029] Oil bottle 2 is made of transparent hard plastic, allowing observation of the oil level inside. Gas cylinder 4 is made of stainless steel. Due to its weight, gas cylinder 4 is prone to tilting when installed on cap 3. To stabilize the installation and operation of gas cylinder 4, a bracket 6 is engaged at the upper end of chuck 11. The bracket 6 has a ring structure, with its inner ring fitting against the outer wall of gas cylinder 4 for stability.

[0030] Compared to existing single-shaft double-ribbon mixers, this new system lubricates the rotating parts of the mixing shaft solely through the internal flow of lubricating oil from oil bottle 2. A pressurization mechanism further enhances the pressure within oil bottle 2, ensuring that the lubricating oil can quickly reach the smaller gaps within the mixing shaft, particularly in critical areas such as the bearing-shaft and bearing-housing connections. This not only provides sufficient lubrication but also prevents overheating and wear caused by insufficient oil, thereby extending the equipment's lifespan.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oiling device for the stirring shaft of a single-shaft double-ribbon mixer, characterized in that, include: Sealed shell (1); For sealing the oiled part of the stirring shaft, the upper end of the sealing shell (1) is threadedly connected to an oil bottle (2) filled with lubricating oil, and the upper end of the oil bottle (2) is threadedly connected to a cap (3). A gas cylinder (4) is threaded to the upper end of a cap (3). A piston (5) is slidably sealed inside the gas cylinder (4). The piston (5) slides downward to deliver the gas in the gas cylinder (4) to the oil bottle (2) and pressurize the inside of the oil bottle (2).

2. The oiling device for the stirring shaft of a single-shaft double-ribbon mixer according to claim 1, characterized in that: The upper end of the sealing shell (1) is fixedly connected to a chuck (11), and the oil bottle (2) is threadedly connected to the upper end of the chuck (11).

3. The oiling device for the stirring shaft of a single-shaft double-ribbon mixer according to claim 2, characterized in that: The upper end of the chuck (11) is engaged with a bracket (6) for supporting the gas cylinder (4).

4. The oiling device for the stirring shaft of a single-shaft double-ribbon mixer according to claim 3, characterized in that: The gas cylinder (4) has an air hole (41) at its upper end.

5. The oiling device for the stirring shaft of a single-shaft double-ribbon mixer according to claim 4, characterized in that: The upper end of the piston (5) is fixedly connected to a screw (51), which is slidably inserted into the upper end of the gas cylinder (4) and extends out from the upper end of the gas cylinder (4).

6. The oiling device for the stirring shaft of a single-shaft double-ribbon mixer according to claim 5, characterized in that: The upper end of the screw (51) extending out of the gas cylinder (4) is threaded with a nut (52) for fixing the piston (5).

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