Built-in packaging type mechanical seal of multifunctional reaction kettle

Abstract

The utility model provides a built-in packaging type mechanical seal of a multifunctional reaction kettle, which comprises a connecting flange connected with a kettle cover, the size of the connecting flange is smaller than that of a kettle opening, and a connecting hole facing the atmosphere side is arranged on the connecting flange. The connecting flange is arranged in the reaction kettle, the connecting flange can be fixed from the position of the kettle cover on the outer side of the reaction kettle, and the stability degree of the connecting flange and the whole mechanical seal is increased. In the embodiment, the sliding bearings are arranged on the two axial sides of the shaft sleeve respectively, the rolling bearings are arranged in the radial direction of the shaft sleeve, the shaft sleeve can adapt to radial and axial vibration of equipment at the same time, and the shaft sleeve is particularly suitable for being applied to multifunctional reaction kettles.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mechanical seal, especially a built-in container type mechanical seal of multifunctional reaction kettle. BACKGROUND

[0002] The multifunctional reaction kettle is a kind of chemical equipment integrating multiple functions, usually used in pharmaceutical, chemical, food and other industries, and sealing device needs to be installed at the kettle opening position of the reaction kettle to close oil, fuel and gas in the equipment, to ensure the safety of the equipment during operation. In the prior art, the sealing device is usually installed on the outside of the kettle cover through the connecting flange, and the position of the connecting flange is relatively located below. When the main shaft is working, the connecting flange will vibrate, especially for the multifunctional reaction kettle, the stirring shaft of the reaction kettle will not only produce radial rotation, but also may produce axial vibration. After long-term use, it may affect the connection stability of the flange and the kettle cover, causing the decline of the sealing effect. Therefore, it is necessary to improve the connection structure of the existing mechanical sealing device and the reaction kettle to enhance the connection stability. SUMMARY

[0003] To solve the above technical problems, the utility model provides a built-in container type mechanical seal of multifunctional reaction kettle, which comprises a device main shaft, a shaft sleeve sleeved on the outside of the device main shaft, a connecting flange, a double-end sealing assembly, a bearing seat and an end cover, which are sequentially sleeved on the outside of the shaft sleeve from the device side to the atmosphere side.

[0004] The radial dimension of the connecting flange is not greater than the radial dimension of the kettle opening, a connecting hole is formed on the connecting flange towards the atmosphere side, the position of the connecting hole corresponds to the position of the fixed hole on the kettle cover, and a second fastener is arranged in the connecting hole. The connecting flange is connected to the inside of the kettle cover through the second fastener.

[0005] Further, the connecting hole is a threaded blind hole formed towards the atmosphere side, and the second fastener is threadedly connected to the threaded blind hole through the positioning hole.

[0006] Further, the bearing seat is press-connected to the double-end sealing assembly on the side close to the atmosphere through the first fastener, the connecting flange is press-connected to the double-end sealing assembly on the side close to the device, and the end cover is press-fitted to the bearing seat on the side close to the atmosphere.

[0007] Further, the bearing seat is installed with a rolling bearing, and the rolling bearing is connected to the outside of the shaft sleeve.

[0008] Further, the double-end sealing assembly comprises two pairs of dynamic ring assemblies and two pairs of static ring assemblies, and the two pairs of static ring assemblies are located on the axial outside of the two pairs of dynamic ring assemblies.

[0009] Further, the dynamic ring assembly comprises a dynamic ring seat arranged in the middle of the shaft sleeve, a push ring and a dynamic ring connected to the two sides of the dynamic ring seat, and the static ring assembly comprises a static ring seat arranged on the two axial sides of the dynamic ring seat and a static ring arranged on the static ring seat, and the static ring and the dynamic ring form a dynamic seal for the medium.

[0010] Further, the double-end sealing assembly comprises a sealing box arranged on the radial outer side of the dynamic ring seat, and a set of static ring seats is respectively pressed at the two ends of the sealing box.

[0011] Further, the outer side of the equipment main shaft is sleeved with an atmospheric side sliding bearing and an equipment side sliding bearing respectively, the atmospheric side sliding bearing and the equipment side sliding bearing are respectively arranged at the two axial ends of the equipment main shaft, and the atmospheric side sliding bearing and the equipment side sliding bearing are arranged between the shaft sleeve and the equipment main shaft.

[0012] Further, the side of the shaft sleeve close to the equipment is connected with a transmission ring, and the transmission ring is arranged on the side of the connecting flange away from the atmosphere.

[0013] Further, the equipment side sliding bearing is arranged on the inner side of the transmission ring, the connecting holes are correspondingly arranged on the transmission ring and the equipment side sliding bearing, the fourth fasteners are arranged in the axial direction and connected to the shaft sleeve through the connecting holes of the transmission ring and the equipment side sliding bearing.

[0014] The utility model provides a kind of built-in container type mechanical seal of multifunctional reaction kettle, including the connecting flange being connected with kettle cover, the size of connecting flange is less than kettle mouth size and is set with the connecting hole towards atmospheric side on connecting flange.Connecting flange is built-in in reaction kettle, can be fixed connecting flange from the outside kettle cover position of reaction kettle, increase the stability degree of connecting flange and entire mechanical seal.In the embodiment, the axial two sides of shaft sleeve are respectively provided with sliding bearing, and rolling bearing is arranged in radial direction, can simultaneously adapt to the radial and axial vibration of equipment, especially suitable for being applied in multifunctional reaction kettle. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure diagram of the built-in container type mechanical seal of the utility model multifunctional reaction kettle.

[0016] BRIEF DESCRIPTION OF DRAWINGS: equipment main shaft 1, shaft sleeve 2, connecting flange 3, bearing seat 4, end gland 5, rolling bearing 6, first fastener 7, second fastener 8, third fastener 9, fourth fastener 10, kettle cover 11, dynamic ring seat 12, push ring 13, dynamic ring 14, static ring seat 15, static ring 16, compression spring 17, sealing box 18, atmospheric side sliding bearing 19, equipment side sliding bearing 20, transmission ring 21. DETAILED DESCRIPTION

[0017] AsFigure 1 As shown in one of the multifunctional reaction kettle built-in container type mechanical seal, the lower part is connected to the device side of the device, the upper part of the mechanical seal is the atmospheric side, the mechanical seal comprises a device main shaft 1, a shaft sleeve 2 sleeved on the outer side of the device main shaft 1, a connecting flange 3, a double-end sealing assembly, a bearing seat 4 and an end cover 5 which are sequentially sleeved on the outer side of the shaft sleeve 2 from the device side to the atmospheric side. The double-end sealing assembly is used to isolate the atmospheric side and the medium side to prevent the medium on both sides from leaking. The shaft sleeve 2 is arranged between the double-end sealing assembly and the device main shaft 1 to avoid direct contact between the double-end sealing assembly and the device main shaft 1, thereby preventing wear and corrosion and assisting in positioning the position of the double-end sealing assembly. The shaft sleeve 2 can be made of conventional metal or can be made of corrosion-resistant or high-temperature-resistant material according to different working conditions to improve the service life of the entire mechanical seal. The bearing seat 4 is provided with a rolling bearing 6 connected to the outer side of the shaft sleeve 2 to isolate the rotating part from the non-rotating part and bear the load generated by the rotation of the shaft sleeve 2. The bearing seat 4 is press-connected to the side of the double-end sealing assembly close to the atmosphere through a first fastener 7, the connecting flange 3 is press-connected to the medium side of the double-end sealing assembly, and the end cover 5 is press-fitted to the side of the bearing seat 4 close to the atmosphere, so that the entire mechanical seal forms a container type structure and can be installed as a whole in the reaction kettle, which is convenient and fast. In the embodiment, the first fastener 7 is a bolt; the bearing is a deep groove ball bearing, so that the overall structure of the mechanical seal is more compact and the installation is faster.

[0018] The mechanical seal provided by the utility model is of built-in structure, the radial dimension of the connecting flange 3 is not greater than the radial dimension of the kettle opening, so that it can be placed in the kettle opening of the reaction kettle. A connecting hole is formed on the connecting flange 3 and faces the atmospheric side, the position of the connecting hole corresponds to the position of the fixed hole on the kettle cover 11, and the connecting hole is used to be connected with the kettle cover 11. The connecting hole can adopt a through hole structure or a threaded blind hole which is formed on the atmospheric side as shown in the drawings. After the connecting end cover is installed in the kettle opening, the kettle cover 11 is installed on the outer side of the kettle opening, and the second fastener 8 is screwed into the positioning hole of the kettle cover 11. Since the position of the positioning hole on the kettle cover 11 corresponds to the position of the connecting hole, the connecting flange 3 can be fixed from the outside. After the device starts to work, the kettle cover 11 can support the connecting flange 3, thereby increasing the connection stability of the connecting flange 3 and the kettle cover 11. It should be noted that the connection between the positioning hole and the connecting hole is not limited to the threaded connection, and other connection structures such as buckling, clamping and riveting can be used to fix the kettle cover 11 on the outer side of the connecting flange 3. Figure 1

[0019] ​The double-ended sealing assembly is a typical mechanical seal structure, comprising a sealing structure fitted onto the outer side of the shaft sleeve 2 on both the media side and the atmospheric side. Each sealing structure consists of a pair of rotating rings 14 and stationary rings 16, with their end faces in contact to form a dynamic seal at the sealing interface. The double-ended sealing assembly prevents media leakage from the equipment end into the atmosphere, thus preventing atmospheric pollution, while simultaneously reducing the entry of dust and air from the atmospheric side into the equipment, thus minimizing internal contamination.

[0020] like Figure 1 As shown, the two pairs of rotating ring assemblies of the double-ended sealing assembly are located on the inner side, while the stationary ring assemblies are located on the outer side. Specifically, the rotating ring assembly includes a rotating ring seat 12 sleeved in the middle of the bushing 2, a push ring 13 connected to both sides of the rotating ring seat 12, and a rotating ring 14. The stationary ring assembly includes a stationary ring seat 15 mounted on both axial sides of the rotating ring seat 12 and a stationary ring 16 mounted on the stationary ring seat 15. A dynamic seal for the medium is formed between the stationary ring 16 and the rotating ring 14. The rotating ring seat 12 is fixedly connected to the bushing 2 by a radially arranged third fastener 9, allowing the rotating ring seat 12 to rotate with the bushing 2. The two rotating rings 14 are located on both axial sides of the rotating ring seat 12. The push ring 13, connected between the rotating ring seat 12 and the rotating ring 14, pushes the rotating ring 14 to contact the end face of the stationary ring 16, supported by the rotating ring seat 12. The push ring 13 and the moving ring seat 12 are connected by a compression spring 17, which provides dynamic compensation to the push ring 13 and the moving ring 14 during equipment operation, and maintains a dynamic seal between the moving ring 14 and the stationary ring 16. The double-ended sealing assembly includes a sealing housing 18 disposed radially outside the moving ring seat 12, with a set of stationary ring seats 15 pressed into each end of the sealing housing 18 to maintain the integration of the entire double-ended sealing assembly.

[0021] In existing technologies, the multi-functional reactor experiences radial displacement due to the rotation of the main shaft 1 during operation. Simultaneously, the reactor body contains elastic components such as bellows for thermal compensation and vibration absorption, leading to axial displacement of the main shaft 1. To address this, this embodiment installs an atmospheric-side sliding bearing 19 and an equipment-side sliding bearing 20 on the outer side of the main shaft 1. These bearings are located at opposite axial ends of the main shaft 1 and are positioned between the bushing 2 and the main shaft 1. The bushing 2 and the main shaft 1 are connected by these two sliding bearings. During operation, the main shaft 1 can exhibit a certain axial displacement relative to the bushing 2, reducing the impact of the main shaft 1's rotation on the sealing components. The sliding bearings enhance the reliability of the mechanical seal system and absorb vibrations and impacts generated during high-speed operation.

[0022] Specifically, the atmospheric side sliding bearing 19 is located on the side of the end gland 5 close to the atmosphere, and is embedded into the shaft sleeve 2 in a hot-embedding manner. Due to the existence of the corrugated pipe in the kettle opening, the shaft sleeve 2 is connected with the transmission ring 21 on the side close to the equipment, the transmission ring 21 is located on the side away from the atmosphere of the connecting flange 3, and extends into the kettle opening after the mechanical seal is assembled, and is connected with the corrugated pipe in the kettle opening. In the embodiment, the equipment side sliding bearing 20 is located on the inner side of the transmission ring 21, and the transmission ring 21 and the equipment side sliding bearing 20 are provided with connecting holes corresponding to each other, the fourth fastener 10 is connected to the shaft sleeve 2 in an axial manner and passes through the connecting holes of the transmission ring 21 and the equipment side sliding bearing 20 in sequence, and the fourth fastener 10 locks the equipment side sliding bearing 20 and the transmission ring 21 on the shaft sleeve 2, and realizes positioning and transmission at the same time. Meanwhile, compared with the hot-embedding manner on the outer side of the shaft sleeve 2, the connection structure is a detachable structure, which is simple in structure, stable in transmission, and convenient to disassemble and assemble.

[0023] It should be noted that the equipment side sliding bearing 20 and the atmospheric side sliding bearing 19 are not limited to the connection manner provided in the embodiment, and the purpose is to fix the sliding bearing on the shaft sleeve 2, provide sufficient axial offset between the shaft sleeve 2 and the equipment main shaft 1, and the two sliding bearings can be uniformly provided as a hot-embedding structure or a detachable structure.

[0024] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A built-in container type mechanical seal of a multifunctional reactor characterized by comprising: The device main shaft (1), the shaft sleeve (2) sleeved on the outer side of the device main shaft (1), the connecting flange (3) sequentially sleeved on the outer side of the shaft sleeve (2) from the device side to the atmosphere side, the double-end sealing assembly, the bearing seat (4) and the end gland (5); The radial size of the connecting flange (3) is not greater than the radial size of the kettle opening, a connecting hole is formed on the connecting flange (3) towards the atmosphere side, the position of the connecting hole corresponds to the position of the fixing hole on the kettle cover (11), and a second fastener (8) is arranged in the connecting hole.

2. The built-in container type mechanical seal of a multifunctional reaction kettle according to claim 1, characterized in that: The connecting hole is a threaded blind hole formed towards the atmosphere side, and the second fastener (8) is threadedly connected to the threaded blind hole through the positioning hole.

3. The set-in type mechanical seal of a multifunctional reaction vessel according to claim 1, wherein: The bearing seat (4) is press-connected to the double-end sealing assembly on the side close to the atmosphere through the first fastener (7), the connecting flange (3) is press-connected to the double-end sealing assembly on the side close to the device, and the end gland (5) is press-fitted to the bearing seat (4) on the side close to the atmosphere.

4. A set-in mechanical seal of a multifunctional reaction vessel according to claim 3, characterized in that: The bearing seat (4) is internally provided with a rolling bearing (6), and the rolling bearing (6) is connected to the outer side of the shaft sleeve (2).

5. The set-in mechanical seal of multifunctional reactor according to claim 1, characterized in that: The double-end sealing assembly comprises two pairs of dynamic ring assemblies and two pairs of static ring assemblies, and the two pairs of static ring assemblies are located on the axial outer sides of the two pairs of dynamic ring assemblies.

6. A set-in mechanical seal of a multifunctional reaction vessel according to claim 5, characterized in that: The dynamic ring assembly comprises a dynamic ring seat (12) sleeved on the middle part of the shaft sleeve (2), a push ring (13) and a dynamic ring (14) connected to both sides of the dynamic ring seat (12), and the static ring (16) assembly comprises a static ring seat (15) mounted on both axial sides of the dynamic ring seat (12) and a static ring (16) mounted on the static ring seat (15), and the static ring (16) and the dynamic ring (14) form dynamic sealing of the medium.

7. A set-in mechanical seal of a multifunctional reaction vessel according to claim 6, characterized in that: The double-end sealing assembly comprises a sealing box body (18) arranged on the radial outer side of the dynamic ring seat (12), and the two ends of the sealing box body (18) are respectively press-connected to a group of static ring seats (15).

8. The set-in mechanical seal of multifunctional reactor according to claim 1, characterized in that: The outer side of the device main shaft (1) is respectively sleeved with an atmosphere side sliding bearing (19) and a device side sliding bearing (20), the atmosphere side sliding bearing (19) and the device side sliding bearing (20) are respectively located at the axial two ends of the device main shaft (1), and the atmosphere side sliding bearing (19) and the device side sliding bearing (20) are arranged between the shaft sleeve (2) and the device main shaft (1).

9. A set-in mechanical seal of a multifunctional reaction vessel according to claim 8, characterized in that: The side close to the device of the shaft sleeve (2) is connected with a transmission ring (21), and the transmission ring (21) is located on the side away from the atmosphere of the connecting flange (3).

10. The set-in mechanical seal of claim 9, wherein: The device side sliding bearing (20) is located on the inner side of the transmission ring (21), and the transmission ring (21) and the device side sliding bearing (20) are correspondingly provided with connecting holes, and the fourth fastener (10) arranged in the axial direction is connected to the shaft sleeve (2) through the connecting holes of the transmission ring (21) and the device side sliding bearing (20) in sequence.

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