High-sealing-performance steady-flow film blowing machine air ring

Abstract

The utility model discloses a high-leakproofness steady-flow film blowing machine air ring which comprises an outer air ring, an air inlet is formed in the outer air ring in a surrounding mode, an inner air ring is arranged corresponding to the outer air ring, the inner air ring is arranged on a rotating disc, an air outlet channel assembly is arranged on one side corresponding to the inner air ring, and an air inlet channel is defined by the inner air ring and the outer air ring. The fan is characterized in that an upper air outlet hole and a lower air outlet hole are formed in the inner air ring in a surrounding mode, auxiliary air outlet holes are formed in the upper side and the lower side corresponding to the upper air outlet hole in a surrounding mode, the hole diameter of the auxiliary air outlet holes is smaller than that of the upper air outlet hole, and an oily sealing assembly is arranged corresponding to the outer air ring and the inner air ring. The air ring is simple in structure and reasonable in design, the uniformity and stability of overall air outlet of the air ring can be further improved by innovatively designing the air outlet hole structure, meanwhile, the oily sealing assembly is additionally arranged, sealing friction of the inner air ring and the outer air ring can be reduced, and the sealing performance is guaranteed.

Description

Technical Field

[0001] This utility model relates to blown film machines, specifically to a high-sealing, stable-flow blown film machine air ring. Background Technology

[0002] The air ring of a blown film machine is an important component. Its main function is to uniformly cool and shape the inflated film bubble by blowing a forced airflow, thereby ensuring the mechanical and optical properties of the film. During operation, the inner air ring and the air outlet assembly of the blown film machine's air ring are generally in a rotating state. However, in actual use, it has been found that the stability and uniformity of the airflow blown from the upper air outlet are poor, resulting in low blown film quality. In addition, the sealing between the inner and outer air rings in traditional air rings is poor, and some gas will leak out between the inner and outer air rings during use. This also easily leads to poor airflow stability and uniformity, and wastes gas. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a high-sealing, stable-flow blown film machine air ring for solving the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution:

[0005] A high-sealing, stable-flow blown film machine air ring includes an outer air ring with an air inlet arranged around it. An inner air ring is arranged corresponding to the outer air ring and is mounted on a rotating disk. An air outlet assembly is arranged on one side of the inner air ring. The inner and outer air rings form an air inlet channel. The inner air ring is characterized by having an upper air outlet and a lower air outlet arranged around it. Secondary air outlets are arranged around both the upper and lower sides of the upper air outlet, with the diameter of the secondary air outlets being smaller than that of the upper air outlet. An oil-based sealing assembly is provided corresponding to the outer and inner air rings.

[0006] The oil-based sealing assembly includes an upper annular sealing block embedded at the top of the inner air ring, an upper sealing groove for the upper annular sealing block to extend into on the outer air ring, and sealing oil filling the space between the upper sealing groove and the upper annular sealing block. A lower annular sealing block is embedded at the bottom of the outer air ring, and a lower sealing groove for the lower annular sealing block to extend into on the inner air ring, with sealing oil filling the space between the lower sealing groove and the lower annular sealing block.

[0007] The top of the inner and outer air rings forms an upper oil inlet groove that communicates with the upper sealing groove, and the bottom of the inner and outer air rings forms a lower oil inlet groove that communicates with the lower sealing groove.

[0008] Sealing rings are provided between the top and bottom of the inner and outer air rings.

[0009] The aforementioned technical solution provides a high-sealing, stable-flow blown film machine air ring. This ring features secondary air outlets arranged around both the upper and lower sides of the upper air outlet. The diameter of the secondary air outlets is smaller than that of the upper air outlet. Due to the difference in size between the upper and secondary air outlets, the gas velocities from the two outlets differ, resulting in a pressure difference and an uneven airflow. Subsequently, the rotation of the inner air ring and the air outlet assembly provides a stabilizing force to the airflow. Experiments have shown that the air ring ultimately produces a more stable airflow. Furthermore, by installing an oil-based sealing component between the inner and outer air rings, the sealing friction between the inner and outer air rings is reduced, ensuring sealing performance. Attached Figure Description

[0010] The present invention includes the following figures:

[0011] Figure 1 This is a diagram of the external structure of the present invention;

[0012] Figure 2 This is a cross-sectional view of the present invention;

[0013] Figure 3 This is a schematic diagram of the inner wind ring of this utility model;

[0014] Figure 4 for Figure 3 A magnified view of the area pointed to by A in the middle;

[0015] Figure 5 for Figure 3 A magnified view of the area pointed to by B. Detailed Implementation

[0016] As shown in the figure, the present invention discloses a high-sealing, stable-flow blown film machine air ring, including an outer air ring 1, an air inlet 2 arranged around the outer air ring 1, an inner air ring 3 arranged corresponding to the outer air ring 1, the inner air ring 3 is arranged on a rotating disk 15, an air outlet assembly 14 is arranged on one side of the inner air ring 3, the inner and outer air rings form an air inlet channel 16, an upper air outlet 6 and a lower air outlet 4 are arranged around the inner air ring 3, and secondary air outlets 5 are arranged around both the upper and lower sides of the upper air outlet 6, the diameter of the secondary air outlets 5 is smaller than the diameter of the upper air outlet 6, and an oil-based sealing assembly is arranged corresponding to the outer air ring 1 and the inner air ring 3.

[0017] Furthermore, the oil-based sealing assembly includes an upper annular sealing block 8 embedded at the top of the inner air ring 3, an upper sealing groove 9 on the outer air ring 1 into which the upper annular sealing block 8 extends, and sealing oil filling the space between the upper sealing groove 9 and the upper annular sealing block 8. A lower annular sealing block 11 is embedded at the bottom of the outer air ring 1, and a lower sealing groove 13 on the inner air ring 3 into which the lower annular sealing block 11 extends, with sealing oil filling the space between the lower sealing groove 13 and the lower annular sealing block 11. The upper and lower annular sealing blocks can be made of elastic material to facilitate their assembly with the inner and outer air rings. This structure, by setting a mating structure between the sealing block and the sealing groove and filling it with sealing oil, effectively achieves an oil-based seal between the inner and outer air rings. The gap between the sealing block and the sealing groove is very small; a small amount of lubricating oil can provide a sealing effect without being blown out by the airflow. Simultaneously, the presence of lubricating oil significantly reduces friction in the sealing assembly, ensuring a seal while improving the stability and smoothness of the air ring rotation.

[0018] Furthermore, the top of the inner air ring 3 and the outer air ring 1 forms an upper oil inlet groove 7 that communicates with the upper sealing groove 9, and the bottom of the inner air ring 3 and the outer air ring 1 forms a lower oil inlet groove 12 that communicates with the lower sealing groove 13. This structure allows for convenient addition of sealing oil.

[0019] Furthermore, sealing rings 10 are provided between the top and bottom of the inner air ring 3 and the outer air ring 1, further increasing the sealing performance between the inner and outer air rings.

[0020] This invention features a structure in which secondary air outlets 5 are arranged around both the upper and lower sides of the upper air outlet 6. The diameter of the secondary air outlets 5 is smaller than that of the upper air outlet 6. Due to the difference in size between the upper air outlet 6 and the secondary air outlets 5, the gas velocities blown out from the two outlets are different, resulting in a certain pressure difference after the gas is blown out, causing the airflow to be in an uneven state. Subsequently, the force generated by the rotation of the inner air ring and the air outlet duct assembly provides a certain stabilizing force to the airflow. Experiments have shown that the air ring can ultimately blow out a more stable airflow. In addition, by setting an oily sealing component between the inner and outer air rings, the sealing friction between the inner and outer air rings can be reduced and the sealing performance can be guaranteed.

Claims

1. A high-sealing, constant-flow blown film machine air ring, comprising an outer air ring (1), an air inlet (2) arranged around the outer air ring (1), an inner air ring (3) arranged corresponding to the outer air ring (1), the inner air ring (3) being arranged on a rotating disk (15), an air outlet assembly (14) being arranged on one side corresponding to the inner air ring (3), and the inner and outer air rings forming an air inlet channel (16), characterized in that: The inner air ring (3) is provided with an upper air outlet (6) and a lower air outlet (4) arranged around it. A secondary air outlet (5) is provided around both the upper and lower sides of the upper air outlet (6). The diameter of the secondary air outlet (5) is smaller than that of the upper air outlet (6). An oily sealing component is provided for the outer air ring (1) and the inner air ring (3).

2. The high-sealing, stable-flow blown film machine air ring according to claim 1, characterized in that: The oily sealing assembly includes an upper annular sealing block (8) embedded at the top of the inner air ring (3), an upper sealing groove (9) for the upper annular sealing block (8) to extend into on the outer air ring (1), and sealing oil filling the space between the upper sealing groove (9) and the upper annular sealing block (8). A lower annular sealing block (11) is embedded at the bottom of the outer air ring (1), and a lower sealing groove (13) for the lower annular sealing block (11) to extend into on the inner air ring (3). Sealing oil filling the space between the lower sealing groove (13) and the lower annular sealing block (11).

3. The high-sealing, stable-flow blown film machine air ring according to claim 2, characterized in that: The top of the inner air ring (3) and the outer air ring (1) form an upper oil inlet groove (7) that communicates with the upper sealing groove (9), and the bottom of the inner air ring (3) and the outer air ring (1) form a lower oil inlet groove (12) that communicates with the lower sealing groove (13).

4. The high-sealing, stable-flow blown film machine air ring according to claim 1, characterized in that: A sealing ring (10) is provided between the top and bottom of the inner air ring (3) and the outer air ring (1).

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