Mechanical sealing device for side stirring

Abstract

The utility model discloses a mechanical sealing device for side stirring, which comprises a shaft sleeve, a flange component and a positioning ring are arranged on the peripheral side of the shaft sleeve, fixing bolts are arranged on the flange component and the positioning ring, a cooling cylinder is arranged between the flange component and the positioning ring, and the flange component, the positioning ring and the cooling cylinder form a sealing cavity. A sealing cavity inlet is formed in the top of the positioning ring, a sealing cavity outlet is formed in the bottom of the flange assembly, a cooling cavity is formed in the cooling cylinder, a cooling cavity inlet is formed in the top of the cooling cylinder, and a cooling cavity outlet is formed in the top of the cooling cylinder; static rings are arranged on the two opposite sides of the flange assembly and the positioning ring, and a spring seat is installed on the peripheral side of the shaft sleeve. According to the utility model, through the arranged spring seat, the movable seat which is elastically matched with the two sides of the spring seat can drive the movable ring to move, so that the movable ring can meet the movement amount during the deformation of the stirring shaft, thereby reducing the influence of the extension of the stirring shaft or the middle sinking deformation on the mechanical seal, and prolonging the service life of the device.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically to a mechanical seal device for side stirring. Background Technology

[0002] A mechanical seal is a device that prevents fluid leakage by consisting of at least one pair of end faces perpendicular to the axis of rotation, which are kept in contact and slide relative to each other under the action of fluid pressure, the elastic force of the compensation mechanism, and the cooperation of auxiliary seals. For example, in side agitator equipment, since the drive shaft runs through the inside and outside of the equipment, a mechanical seal device is required for sealing.

[0003] Existing side agitators often have very long agitator shafts with multiple agitators mounted on them. During operation, the shaft may elongate or sink in the middle due to temperature, its own weight, the weight of the agitators, and the resistance between the agitators and the medium. This adversely affects the effectiveness and service life of the mechanical seal installed at the vessel opening. There is an urgent need to design a mechanical seal device for side agitators to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a mechanical seal device for side stirring, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mechanical seal device for side stirring includes a bushing, a flange assembly and a positioning ring disposed around the bushing, and fixing bolts disposed on the flange assembly and the positioning ring. A cooling cylinder is disposed between the flange assembly and the positioning ring, and the flange assembly, the positioning ring and the cooling cylinder form a sealing cavity. The top of the positioning ring has a sealing cavity inlet, and the bottom of the flange assembly has a sealing cavity outlet. A cooling cavity is disposed inside the cooling cylinder, and the top of the cooling cylinder has a cooling cavity inlet and a cooling cavity outlet. Stationary rings are disposed on opposite sides of the flange assembly and the positioning ring. A spring seat is installed around the bushing and is located inside the sealing cavity. Movable seats are elastically fitted on opposite outer sides of the spring seats. Movable rings are disposed on opposite outer sides of the two movable seats, and the two movable rings abut against the two stationary rings respectively.

[0007] Furthermore, a positioning plate is provided on one side of the positioning ring, an annular groove corresponding to the positioning plate is opened on the circumference of the bushing, and an internal hexagon screw that is threadedly engaged with the positioning ring is provided on one side of the positioning plate.

[0008] Furthermore, a cooling chamber is provided inside the flange assembly, with a cooling chamber inlet at the top and a cooling chamber outlet at the bottom.

[0009] Furthermore, one end of the flange assembly is provided with a groove, a pressure ring is provided in the groove, a plurality of bolt grooves are provided in the pressure ring, and a plurality of bolt holes corresponding to the plurality of bolt grooves are provided on one side of the groove.

[0010] Furthermore, the flange assembly and the positioning ring are provided with stationary ring grooves on opposite sides, and multiple positioning rods are provided in the stationary ring grooves. The positioning rods are inserted into the stationary ring. The flange assembly and the positioning ring are provided with limit grooves on opposite sides, and gaskets are provided in the limit grooves. The two ends of the cooling cylinder correspond to two of the limit grooves respectively.

[0011] Furthermore, the spring seat has spring grooves on the top and bottom of its two outer sides, and a spring is installed in the spring groove. One end of the spring is connected to one side of the movable seat. The bottom of the spring seat has a screw groove, and an anti-rotation screw is installed in the screw groove. The bottom of the bushing has a screw hole corresponding to the anti-rotation screw.

[0012] In the above technical solution, the mechanical seal device for side stirring provided by this utility model has the following advantages:

[0013] The spring seat allows the movable seats on both sides of the spring seat to move, enabling the moving ring to move to accommodate the movement of the stirring shaft during deformation. This reduces the impact of shaft elongation or subsidence on the mechanical seal, extending the service life of the device. The cooling cylinder, positioned between the flange assembly and the positioning ring, forms a sealing cavity. The cooling chamber within the cooling cylinder corresponds to the sealing cavity, allowing it to cool and lower the temperature of the sealing cavity. This reduces the temperature rise of the shaft near the mechanical seal, minimizing shaft deformation and reducing the impact of temperature on the stationary and moving rings of the mechanical seal. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the mechanical seal device provided in an embodiment of the mechanical seal device for side stirring according to the present invention.

[0016] Figure 2 This is a schematic diagram of the sealing cavity structure provided in an embodiment of a mechanical seal device for side stirring according to the present invention.

[0017] Figure 3 This is a schematic diagram of the flange assembly structure provided for an embodiment of a side-stirring mechanical seal device of this utility model.

[0018] Figure 4 This is a schematic diagram of the spring seat structure provided in an embodiment of a mechanical seal device for side stirring according to the present invention.

[0019] 1. Bushing; 2. Flange assembly; 3. Locating ring; 4. Cooling cylinder; 5. Sealing cavity inlet; 6. Sealing cavity outlet; 7. Cooling cavity; 8. Cooling cavity inlet; 9. Cooling cavity outlet; 10. Stationary ring; 11. Spring seat; 12. Moving seat; 13. Moving ring; 14. Locating plate; 15. Annular groove; 16. Socket head screw; 17. Cooling cavity; 18. Cooling cavity inlet; 19. Cooling cavity outlet; 20. Groove; 21. Pressure ring; 22. Stationary ring groove; 23. Locating rod; 24. Limiting groove; 25. Washer; 26. Spring groove; 27. Spring; 28. Screw groove; 29. ​​Anti-rotation screw; 30. Screw hole. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-4 As shown in the figure, this utility model provides a mechanical seal device for side stirring.

[0022] The assembly includes a bushing 1, a flange assembly 2 and a positioning ring 3 on the periphery of the bushing 1, fixing bolts on the flange assembly 2 and the positioning ring 3, a cooling cylinder 4 between the flange assembly 2 and the positioning ring 3, and the flange assembly 2, the positioning ring 3 and the cooling cylinder 4 forming a sealed cavity. The top of the positioning ring 3 has a sealed cavity inlet 5, the bottom of the flange assembly 2 has a sealed cavity outlet 6, the cooling cylinder 4 has a cooling cavity 7, the top of the cooling cylinder 4 has a cooling cavity inlet 8, and the top of the cooling cylinder 4 has a cooling cavity outlet 9. Static rings 10 are provided on both sides of the flange assembly 2 and the positioning ring 3. Spring seats 11 are installed on the periphery of the bushing 1 and are located in the sealed cavity. Movable seats 12 are elastically fitted on both sides of the spring seats 11. Movable rings 13 are provided on both sides of the two movable seats 12, and the two movable rings 13 abut against the two static rings 10 respectively.

[0023] Reference Figure 1In this embodiment, a positioning plate 14 is provided on one side of the positioning ring 3, and an annular groove 15 corresponding to the positioning plate 14 is opened on the circumference of the bushing 1. An internal hexagon screw 16 that is threaded into the positioning ring 3 is provided on one side of the positioning plate 14. The positioning plate 14 can be inserted into the annular groove 15 by the positioning plate 14, and the internal hexagon screw 16 is used to connect the positioning plate 14 and the positioning ring 3 to position the positioning ring 3.

[0024] Reference Figure 2 In this embodiment, a cooling chamber 17 is provided inside the flange assembly 2. A cooling chamber inlet 18 is provided at the top of the flange assembly 2, and a cooling chamber outlet 19 is provided at the bottom of the flange assembly 2. Through the cooling chamber 17, cooling water can be circulated using the cooling chamber inlet 18 and the cooling chamber outlet 19, thereby stabilizing the shaft near the cooling chamber 17.

[0025] Reference Figure 3 In this embodiment, one end of the flange assembly 2 is provided with a groove 20, and a pressure ring 21 is provided in the groove 20. The pressure ring 21 has multiple bolt slots, and one side of the groove 20 has multiple bolt holes corresponding to the bolt slots. By providing the pressure ring 21, the pressure ring 21 can be installed into one end of the flange assembly 2, so that the flange assembly 2 can be installed on one side of the external equipment. The pressure ring 21 can also act as a gasket for protection.

[0026] Reference Figure 3 In this embodiment, both sides of the flange assembly 2 and the positioning ring 3 are provided with stationary ring grooves 22. Multiple positioning rods 23 are installed within the stationary ring grooves 22, and the positioning rods 23 are inserted into and engaged with the stationary ring 10. Limiting grooves 24 are also provided on both sides of the flange assembly 2 and the positioning ring 3, and washers 25 are installed within the limiting grooves 24. The two ends of the cooling cylinder 4 correspond to two limiting grooves 24 respectively. Through the positioning rods 23, the stationary ring 10 can be placed into the stationary ring grooves 22, thus fixing the stationary ring 10. The flange assembly 2, the positioning ring 3, and the cooling cylinder 4 are joined to form a sealed chamber, allowing the two ends of the cooling cylinder 4 to enter the two limiting grooves 24 for positioning, and the washers 25 to provide abutment protection.

[0027] Reference Figure 4In this embodiment, the spring seat 11 has spring grooves 26 on both the top and bottom of its two outer sides. A spring 27 is installed in the spring groove 26, and one end of the spring 27 is connected to one side of the movable seat 12. A screw groove 28 is provided at the bottom of the spring seat 11, and an anti-rotation screw 29 is provided in the screw groove 28. A screw hole 30 corresponding to the anti-rotation screw 29 is provided at the bottom of the bushing 1. The spring 27 can push the movable seat 12 to move, causing the movable seat 12 to push the moving ring 13 to abut against the stationary ring 10. When the spring 27 is compressed, it can retract into the spring groove 26. The anti-rotation screw 29 passes through the screw groove 28 and is threaded into the screw hole 30, so that the spring seat 11 is fixed to the periphery of the bushing 1.

[0028] Working principle: In use, first, the spring seat 11 is installed and fixed on the circumference of the bushing 1. Then, the flange assembly 2, cooling cylinder 4, and positioning ring 3 are sequentially installed on the circumference of the bushing 1, so that the cooling cylinder 4 is located between the flange assembly 2 and the positioning ring 3. The positioning ring 3 can position the bushing 1 on the circumference, determining the position of the flange assembly 2, cooling cylinder 4, and positioning ring 3. Then, the two ends of the cooling cylinder 4 are connected to the flange assembly 2 and the positioning ring 3 respectively to form a sealing cavity. At this time, the two moving rings 13 will abut against the two stationary rings 10. Then, lubricant is added into the sealing cavity through the sealing cavity inlet 5, and cooling water is added into the cooling cavity 7 through the cooling cavity inlet 8, which can cool the sealing cavity. The cooling cavity inlet 8 and the cooling cavity outlet 9 can circulate the cooling water.

[0029] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mechanical seal device for side stirring, comprising a bushing (1), characterized in that, A flange assembly (2) and a positioning ring (3) are provided around the bushing (1). The flange assembly (2) and the positioning ring (3) are provided with fixing bolts. A cooling cylinder (4) is provided between the flange assembly (2) and the positioning ring (3). The flange assembly (2), the positioning ring (3) and the cooling cylinder (4) form a sealed cavity. The top of the positioning ring (3) is provided with a sealed cavity inlet (5), and the bottom of the flange assembly (2) is provided with a sealed cavity outlet (6). A cooling cavity (7) is provided inside the cooling cylinder (4). The top of the cooling cylinder (4) is... The cooling chamber has a cooling chamber inlet (8) and a cooling chamber outlet (9) at the top of the cooling cylinder (4). The flange assembly (2) and the positioning ring (3) are provided with stationary rings (10) on opposite sides. The bushing (1) is equipped with a spring seat (11) on its periphery. The spring seat (11) is located in the sealing cavity. The two outer sides of the spring seat (11) are elastically fitted with movable seats (12). The two movable seats (12) are provided with moving rings (13) on opposite outer sides. The two moving rings (13) abut against the two stationary rings (10) respectively.

2. The mechanical seal device for side stirring according to claim 1, characterized in that, A positioning plate (14) is provided on one side of the positioning ring (3), and an annular groove (15) corresponding to the positioning plate (14) is provided on the circumference of the bushing (1). An internal hexagon screw (16) that is threadedly engaged with the positioning ring (3) is provided on one side of the positioning plate (14).

3. The mechanical seal device for side stirring according to claim 1, characterized in that, The flange assembly (2) is provided with a cooling chamber (17), the top of the flange assembly (2) is provided with a cooling chamber inlet (18), and the bottom of the flange assembly (2) is provided with a cooling chamber outlet (19).

4. The mechanical seal device for side stirring according to claim 1, characterized in that, One end of the flange assembly (2) is provided with a groove (20), and a pressure ring (21) is provided in the groove (20). Multiple bolt grooves are provided in the pressure ring (21), and multiple bolt holes corresponding to the multiple bolt grooves are provided on one side of the groove (20).

5. A mechanical seal device for side stirring according to claim 1, characterized in that, The flange assembly (2) and the positioning ring (3) are provided with stationary ring grooves (22) on opposite sides. Multiple positioning rods (23) are provided in the stationary ring grooves (22). The positioning rods (23) are inserted into the stationary ring (10). Limiting grooves (24) are provided on opposite sides of the flange assembly (2) and the positioning ring (3). Washers (25) are provided in the limiting grooves (24). The two ends of the cooling cylinder (4) correspond to the two limiting grooves (24) respectively.

6. A mechanical seal device for side stirring according to claim 1, characterized in that, The spring seat (11) has spring grooves (26) on its top and bottom sides on both sides. A spring (27) is installed in the spring groove (26). One end of the spring (27) is connected to one side of the movable seat (12). A screw groove (28) is provided at the bottom of the spring seat (11). An anti-rotation screw (29) is provided in the screw groove (28). A screw hole (30) corresponding to the anti-rotation screw (29) is provided at the bottom of the bushing (1).

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