Mechanical sealing device for kneading reactor

Abstract

The utility model relates to the technical field of kneading reactors, and discloses a mechanical sealing device for a kneading reactor, which comprises a rotating shaft, and a sealing assembly is arranged on the side wall of the rotating shaft. According to the mechanical sealing device for the kneading reactor, when the rotating shaft does not rotate, the coil spring drives the blades to be wound, the gaps between the right mounting ring and the left mounting ring are filled with the blades, the sealing assembly is sealed, dust or insects are prevented from entering the rotor of the driving device, and the sealing performance of the sealing assembly is kept; meanwhile, due to the flow velocity difference caused by different superficial areas of the two sides of the blades, airflow flows towards the sides, away from the rotating shaft, of the blades, and high-temperature airflow near the rotor and the rotating shaft flows out of the sealing device; the heat dissipation performance of the driving device is further improved, normal operation of the driving device is ensured, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of kneading reactors, in particular to a mechanical sealing device for kneading reactors. Background Art

[0002] A kneading reactor is a device used for mixing, reacting and processing substances. It combines the effects of stirring and shearing. Through rotational or swinging motion, different ingredients are mixed together and chemical reactions or physical changes are promoted. A kneading reactor usually consists of a container and an agitator. The container is usually cylindrical or conical and has sealing properties to prevent leakage of substances. The agitator is usually a device with rotational or swinging motion, and power transmission can be achieved through a driving device. When a drive shaft is used to connect the drive device and the agitator, a mechanical sealing device is usually set on the side wall of the drive shaft. Through appropriate sealing mechanisms, external pollutants can be effectively prevented from contaminating the rotor.

[0003] However, during actual use of the above-mentioned kneading reactor, the rotor will generate a large amount of heat during operation, and the sealing structure isolates the rotor from the external environment, which makes it difficult for the heat to be dissipated; in view of this, we propose a mechanical sealing device for a kneading reactor. Utility Model Content

[0004] The purpose of the utility model is to provide a mechanical sealing device for a kneading reactor to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a mechanical sealing device for a kneading reactor, comprising a rotating shaft, a side wall of the rotating shaft is provided with a sealing assembly, and the sealing assembly comprises:

[0006] A moving ring, the side wall of the rotating shaft is fixedly connected with the moving ring, and the side wall of the moving ring is fixedly connected with a right mounting ring;

[0007] The blades, the side wall of the right mounting ring is fixedly connected with a connecting shaft, and the side wall of the connecting shaft is rotatably connected with the blades;

[0008] A stationary ring, wherein one end of the connecting shaft away from the right mounting ring is fixedly connected to the left mounting ring, the outer wall of the left mounting ring is sleeved with a stationary ring, and the stationary ring is fixedly connected to the kneading reactor body;

[0009] A coil spring is fixedly connected to the side wall of the connecting shaft, and one end of the coil spring away from the connecting shaft is fixedly connected to the blade.

[0010] Preferably, a U-shaped frame is fixedly connected to the outer wall of the right mounting ring, and the U-shaped frame is fixedly connected to the annular frame.

[0011] Preferably, the blades are arranged in several groups, the blades in several groups are arranged circumferentially, the blades in several groups are butted end to end, and the blades butted end to end form a sealed annular structure.

[0012] Preferably, there is a cavity between the blade and the rotating shaft, and there is a cavity between the left mounting ring and the rotating shaft, so that the airflow can move from the rotor to below the blade.

[0013] Preferably, the force applied by the coil spring to the blade is balanced with the gravity exerted on the blade. When the shaft is stationary, the coil spring drives the blade to retract, so that the blade fills the gap between the right mounting ring and the left mounting ring, thereby sealing the sealing assembly.

[0014] Preferably, the U-shaped frames are arranged in several groups, and the U-shaped frames are arranged circumferentially at equal intervals on the side wall of the right mounting ring. The U-shaped frames and the annular frames limit the blades and prevent operators from accidentally touching the blades.

[0015] Compared with the prior art, the utility model provides a mechanical sealing device for a kneading reactor, which has the following beneficial effects:

[0016] 1. The mechanical sealing device for the kneading reactor is provided with a right mounting ring, a connecting shaft, a left mounting ring, blades, and a coil spring. When the rotating shaft is not rotating, the coil spring drives the blades to roll up, so that the blades fill the gap between the right mounting ring and the left mounting ring, so that the sealing component is sealed, dust or insects are prevented from entering the rotor of the driving device, and the sealing performance of the sealing component is maintained. When the driving device rotates, the blades are unfolded, so that a gap appears between the right mounting ring and the left mounting ring, so that heat can be dissipated. At the same time, due to the flow rate difference caused by the different surface areas on both sides of the blade, the airflow flows to the side of the blade away from the rotating shaft, and the high-temperature airflow near the rotor and the rotating shaft flows outside the sealing device, which further improves the heat dissipation performance of the driving device, ensures its normal operation, and prolongs its service life.

[0017] 2. The mechanical sealing device for the kneading reactor is provided with a U-shaped frame and an annular frame, which limit the blades and prevent operators from accidentally touching the blades, thereby improving the safety of the operators and improving the stability of the sealing assembly during heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the utility model structure without the static ring;

[0020] Figure 3 This is a schematic structural diagram of the connection relationship between the blade and the connecting shaft of the utility model.

[0021] In the figure: 1, rotating shaft; 2, moving ring; 3, right mounting ring; 4, connecting shaft; 5, left mounting ring; 6, stationary ring; 7, blades; 8, coil spring; 9, U-shaped frame; 10, ring frame. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 3 As shown, the utility model provides a technical solution: a mechanical sealing device for a kneading reactor, comprising a rotating shaft 1, a side wall of the rotating shaft 1 is provided with a sealing assembly, and the sealing assembly includes a moving ring 2, a right mounting ring 3, a connecting shaft 4, a left mounting ring 5, a stationary ring 6, blades 7, a coil spring 8, a U-shaped frame 9, and a ring frame 10.

[0023] In one embodiment of the utility model, a moving ring 2 is fixedly connected to the side wall of the rotating shaft 1, a right mounting ring 3 is fixedly connected to the side wall of the moving ring 2, a connecting shaft 4 is fixedly connected to the side wall of the right mounting ring 3, a blade 7 is rotatably connected to the side wall of the connecting shaft 4, a cavity is present between the blade 7 and the rotating shaft 1, the number of blades 7 is arranged in several groups, several groups of blades 7 are arranged circumferentially, several groups of blades 7 are butted end to end, and the blades 7 butted end to end form a sealed annular structure, one end of the connecting shaft 4 away from the right mounting ring 3 is fixedly connected to the left mounting ring 5, a cavity is present between the left mounting ring 5 and the rotating shaft 1, the airflow is able to move from the rotor to the bottom of the blade 7, the outer wall of the left mounting ring 5 is sleeved with a static ring 6, and the static ring 6 is opposite to the kneading ring 6. The device body is fixedly connected, and a coil spring 8 is fixedly connected to the side wall of the connecting shaft 4. The end of the coil spring 8 away from the connecting shaft 4 is fixedly connected to the blade 7. The force applied by the coil spring 8 to the blade 7 is balanced with the gravity exerted on the blade 7. When the rotating shaft 1 is stationary, the coil spring 8 drives the blade 7 to reel up, so that the blade 7 fills the gap between the right mounting ring 3 and the left mounting ring 5, so that the sealing assembly is sealed. The outer wall of the right mounting ring 3 is fixedly connected with a U-shaped frame 9, and the U-shaped frame 9 is fixedly connected to the annular frame 10. The number of U-shaped frames 9 is provided in several groups, and several groups of U-shaped frames 9 are arranged equidistantly on the side wall of the right mounting ring 3. The U-shaped frame 9 and the annular frame 10 limit the blade 7 and prevent the operator from accidentally touching the blade 7.

[0024] When the shaft 1 is not rotating, the coil spring 8 drives the blade 7 to retract, so that the blade 7 fills the gap between the right mounting ring 3 and the left mounting ring 5, so that the sealing assembly is sealed, preventing dust or insects from entering the rotor of the driving device and maintaining the sealing performance of the sealing assembly. When the driving device starts to rotate, due to the action of centrifugal force, the blade 7 is simultaneously subjected to gravity and centrifugal force, and the coil spring 8 cannot continue to retract the blade 7. The blade 7 unfolds, so that a gap appears between the right mounting ring 3 and the left mounting ring 5, which can dissipate heat. At the same time, the surface area of ​​the side of the blade 7 away from the shaft 1 is larger than the surface area of ​​the side of the blade 7 close to the shaft 1. Therefore, the airflow has a large flow rate on the side of the blade 7 away from the shaft 1, and thus the pressure is small, while the flow rate is small but the pressure is large on the side close to the shaft 1, so that the airflow flows to the side of the blade 7 away from the shaft 1, and the high-temperature airflow near the rotor and the shaft 1 flows outside the sealing device, further improving the heat dissipation performance of the driving device, ensuring its normal operation, and extending its service life.

[0025] In addition, a U-shaped frame 9 is fixedly connected to the outer wall of the right mounting ring 3, and the U-shaped frame 9 is fixedly connected to the annular frame 10. The number of U-shaped frames 9 is arranged in several groups, and several groups of U-shaped frames 9 are arranged in a circle at equal intervals on the side wall of the right mounting ring 3. The U-shaped frame 9 and the annular frame 10 limit the blade 7 and prevent the operator from accidentally touching the blade 7, thereby improving the safety of the operator and improving the stability of the sealing assembly during heat dissipation.

[0026] When the drive device starts to rotate, the blade 7 is subjected to gravity and centrifugal force at the same time, and the coil spring 8 cannot continue to retract the blade 7. The blade 7 unfolds, so that a gap appears between the right mounting ring 3 and the left mounting ring 5, so that the heat can be dissipated. The airflow velocity is large on the side of the blade 7 away from the rotating shaft 1, and the pressure is small. The flow velocity is small on the side close to the rotating shaft 1, but the pressure is large, so that the airflow flows to the side of the blade 7 away from the rotating shaft 1. The high-temperature airflow near the rotor and the rotating shaft 1 flows outside the sealing device, thereby improving the flow of the airflow carrying heat. Furthermore, the U-shaped frame 9 and the annular frame 10 limit the blade 7 and prevent the operator from accidentally touching the blade 7.

[0027] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A mechanical sealing device for a kneading reactor, comprising a rotating shaft (1), characterized in that: The side wall of the rotating shaft (1) is provided with a sealing assembly, and the sealing assembly comprises: A moving ring (2), the side wall of the rotating shaft (1) is fixedly connected with the moving ring (2), and the side wall of the moving ring (2) is fixedly connected with a right mounting ring (3); The blade (7) is fixedly connected to the side wall of the right mounting ring (3) with a connecting shaft (4), and the side wall of the connecting shaft (4) is rotatably connected to the blade (7); A stationary ring (6), one end of the connecting shaft (4) away from the right mounting ring (3) is fixedly connected to the left mounting ring (5), the outer wall of the left mounting ring (5) is sleeved with the stationary ring (6), and the stationary ring (6) is fixedly connected to the kneading reactor body; A coil spring (8), wherein the side wall of the connecting shaft (4) is fixedly connected with the coil spring (8), and one end of the coil spring (8) away from the connecting shaft (4) is fixedly connected to the blade (7).

2. A mechanical sealing device for a kneading reactor according to claim 1, characterized in that: The outer wall of the right mounting ring (3) is fixedly connected with a U-shaped frame (9), and the U-shaped frame (9) is fixedly connected to the annular frame (10).

3. The mechanical sealing device for a kneading reactor according to claim 1, characterized in that: The number of the blades (7) is arranged in a plurality of groups, and the blades (7) in a plurality of groups are arranged circumferentially, and the blades (7) in a plurality of groups are butted end to end.

4. The mechanical sealing device for a kneading reactor according to claim 1, characterized in that: There is a cavity between the blade (7) and the rotating shaft (1), and there is a cavity between the left mounting ring (5) and the rotating shaft (1).

5. The mechanical sealing device for a kneading reactor according to claim 1, characterized in that: The force applied by the coil spring (8) to the blade (7) is balanced with the gravity exerted on the blade (7).

6. A mechanical sealing device for a kneading reactor according to claim 2, characterized in that: The number of the U-shaped frames (9) is set in a plurality of groups, and the plurality of groups of the U-shaped frames (9) are equidistantly arranged in a circle on the side wall of the right mounting ring (3).

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