Container type mechanical sealing device with radial auxiliary sealing structure

Abstract

The utility model provides a packaging type mechanical sealing device with a radial auxiliary sealing structure, which comprises a fixed ring seat, a movable ring seat, a fixed ring body, a movable ring body, an auxiliary static ring and an auxiliary pressing ring. Double sealing can be achieved, the sealing performance is remarkably improved, a labyrinth sealing structure is formed between a flow blocking ring groove in the inner wall of the auxiliary static ring and the movable ring base, the sealing effect is further enhanced, medium leakage is effectively prevented, the movable ring base conducts radial limiting on the movable ring body through a limiting circular bead, and the sealing performance is improved. The stability of the movable ring body in the rotating process is ensured, the auxiliary static ring is axially positioned through the auxiliary pressing ring and the tightening pressure spring, looseness or displacement of the auxiliary static ring is prevented, the reliability of the device is improved, the sealing requirements under various working conditions are met, and different working conditions can be flexibly coped with by adjusting the material and the structure of the sealing assembly.

Description

Technical Field

[0001] The utility model relates to a mechanical seal device, in particular to a cartridge mechanical seal device with a radial auxiliary seal structure. Background Art

[0002] Patent document CN210715956U discloses a mechanical seal assembly, including a dynamic ring and an inner support tube. An inner set screw is fixed inside the left end of the dynamic ring, and a sealing ring is arranged inside the dynamic ring. At the same time, a connecting ring is fixed at the right end of the dynamic ring. The right end of the connecting ring is connected with a receiving ring through a rotating groove and a connecting ring. The right end of the receiving ring is fixed with a static ring. The outside of the static ring is connected with a gland through a gasket. The right end of the gland is fixed with a push ring. At the same time, a groove is opened at the right end of the push ring. The inner support tube is fixed inside the groove. The outer end of the inner support tube is connected with an outer support tube through a sliding groove and a convex block. At the same time, a spring is wrapped around the outer periphery of the outer support tube. The right end of the spring is connected with a spring seat through a clamping groove. The outer end of the spring seat is connected with the gland through a bolt. The spring is arranged outside the sealing mechanism to prevent the spring from being blocked when materials leak. However, this mechanical seal only uses an axial sealing surface for sealing, and there will still be a small amount of leakage on the radial surface, and there is still room for further improvement in the sealing performance. Therefore, it is necessary to optimize its structure to overcome the above defects. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cartridge mechanical seal device with a radial auxiliary seal structure to improve its sealing performance.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A cartridge mechanical seal device with a radial auxiliary seal structure, which includes:

[0006] A fixed ring seat, which is installed in the equipment frame through a connecting piece, and a clearance shaft hole is opened inside it;

[0007] A movable ring seat, which penetrates through the clearance shaft hole and is sleeved on the rotating mandrel, and can rotate in the fixed ring seat along with the rotating mandrel;

[0008] A fixed ring body, which is installed in the fixed ring seat and corresponds to the position of the movable ring seat;

[0009] A movable ring body, which is installed in the movable ring seat and can rotate together with the movable ring seat. The axial end faces of the fixed ring body and the movable ring body are mutually abutted to form an axial sealing surface between the fixed ring body and the movable ring body;

[0010] An auxiliary stationary ring is installed in the fixed ring seat. The inner wall thereof abuts against the outer wall of the movable ring seat, and a radial sealing surface is formed between the auxiliary stationary ring and the movable ring seat.

[0011] An auxiliary pressing ring is installed in the fixed ring seat and abuts against the axial end face of the auxiliary stationary ring, and the auxiliary stationary ring is axially positioned by the auxiliary pressing ring.

[0012] In an embodiment of the present utility model, a connecting flange is provided at the outer end of the fixed ring seat. The connecting flange extends along the circumferential direction of the fixed ring seat and protrudes radially outward from the fixed ring seat. A set of connecting holes are formed inside it, and the connecting holes are evenly arranged along the circumferential direction of the connecting flange. The connecting flange can be fixedly connected to the equipment frame through a connecting bolt adapted thereto.

[0013] In an embodiment of the present utility model, a transfer convex ring is provided on the inner wall of the fixed ring seat. The transfer convex ring extends along the circumferential direction of the fixed ring seat and protrudes radially inward from the fixed ring seat. The fixed ring body is installed on the axial inner end face of the transfer convex ring and is exposed from the circumferential inner end face of the fixed ring seat. The auxiliary stationary ring is installed on the axial outer end face of the transfer convex ring.

[0014] In an embodiment of the present utility model, a limiting shoulder is provided at the axial inner end of the movable ring seat. The limiting shoulder extends along the circumferential direction of the movable ring seat, protrudes radially outward from the movable ring seat, and corresponds to the position of the fixed ring body. The movable ring body is installed on the limiting shoulder, and the movable ring body is radially limited by the limiting shoulder.

[0015] In an embodiment of the present utility model, a set of baffle ring grooves are formed on the inner wall of the auxiliary stationary ring. The baffle ring grooves respectively extend along the circumferential direction of the auxiliary stationary ring and are arranged in sequence along the axial direction of the auxiliary stationary ring. A radial baffle space is formed between the movable ring seat and the baffle ring grooves, constituting a labyrinth seal structure.

[0016] In an embodiment of the present utility model, locking bolt holes are formed in the side wall of the movable ring seat. The locking bolt holes are arranged in sequence along the circumferential direction of the movable ring seat. The movable ring seat can be fixedly connected to the rotating mandrel through a locking bolt adapted thereto.

[0017] In an embodiment of the present utility model, a set of tightening compression springs are arranged between the auxiliary stationary ring and the transfer convex ring. The tightening compression springs are respectively arranged in sequence along the circumferential direction of the transfer convex ring, and both ends thereof respectively abut against the auxiliary stationary ring and the transfer convex ring, and the auxiliary stationary ring is axially positioned by the tightening compression springs.

[0018] The advantages of the present utility model are as follows:

[0019] This mechanical seal can achieve double sealing through the axial sealing surface between the fixed ring body and the movable ring body, as well as the radial sealing surface between the auxiliary static ring and the movable ring seat, significantly improving the sealing performance. A labyrinth sealing structure is formed between the baffle ring groove on the inner wall of the auxiliary static ring and the movable ring seat, further enhancing the sealing effect and effectively preventing medium leakage. The movable ring seat radially positions the movable ring body through a limiting shoulder to ensure the stability of the movable ring body during rotation. The auxiliary pressing ring and the tightening compression spring axially position the auxiliary static ring to prevent the auxiliary static ring from loosening or shifting under high-pressure or high-speed working conditions, improving the reliability of the device. It is applicable to the sealing requirements under various working conditions, including high pressure, high speed, high temperature, and corrosive media, etc. By adjusting the materials and structures of the sealing components, it can flexibly respond to different working conditions. Brief Description of the Drawings

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the assembled mechanical seal device with a radial auxiliary sealing structure proposed by the present utility model. Detailed Embodiment

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0022] As Figure 1As shown in the figure, the assembled mechanical seal device with a radial auxiliary sealing structure proposed by the present utility model includes a fixed ring seat 100, a movable ring seat 200, a fixed ring body 300, a movable ring body 400, an auxiliary static ring 500 and an auxiliary pressing ring 600. The fixed ring seat is installed in the equipment frame through a connecting piece, and a clearance shaft hole is provided inside it. The movable ring seat penetrates through the clearance shaft hole and is sleeved on the rotating mandrel, and can rotate in the fixed ring seat along with the rotating mandrel. The fixed ring body is installed in the fixed ring seat and corresponds to the position of the movable ring seat. The movable ring body is installed in the movable ring seat and can rotate together with the movable ring seat. The axial end faces of the fixed ring body and the movable ring body are mutually abutted to form an axial sealing surface between the fixed ring body and the movable ring body. The auxiliary static ring is installed in the fixed ring seat, and its inner wall abuts against the outer wall of the movable ring seat to form a radial sealing surface between the auxiliary static ring and the movable ring seat. The auxiliary pressing ring is installed in the fixed ring seat and abuts against the axial end face of the auxiliary static ring, and the auxiliary static ring is axially positioned by the auxiliary pressing ring.

[0023] In this embodiment, a connecting flange 110 is provided at the outer end of the fixed ring seat. The connecting flange extends along the circumference of the fixed ring seat and protrudes radially outward from the fixed ring seat. A set of connecting holes are provided inside it, and the connecting holes are evenly arranged along the circumference of the connecting flange. The connecting flange can be fixedly connected to the equipment frame through matching connecting bolts.

[0024] In this embodiment, a transfer convex ring 120 is provided on the inner wall of the fixed ring seat. The transfer convex ring extends along the circumference of the fixed ring seat and protrudes radially inward from the fixed ring seat. The fixed ring body is installed on the axial inner end face of the transfer convex ring and exposes from the circumferential inner end face of the fixed ring seat. The auxiliary static ring is installed on the axial outer end face of the transfer convex ring.

[0025] In this embodiment, a limiting shoulder 210 is provided at the axial inner end of the movable ring seat. The limiting shoulder extends along the circumference of the movable ring seat, protrudes radially outward from the movable ring seat, and corresponds to the position of the fixed ring body. The movable ring body is installed on the limiting shoulder, and the movable ring body is radially limited by the limiting shoulder.

[0026] In this embodiment, a set of baffle ring grooves 510 are provided on the inner wall of the auxiliary static ring. Each baffle ring groove extends along the circumference of the auxiliary static ring and is arranged in sequence along the axis of the auxiliary static ring, forming a radial baffle space between the movable ring seat and the baffle ring grooves.

[0027] In this embodiment, locking bolt holes 220 are provided on the side wall of the movable ring seat. The locking bolt holes are arranged in sequence along the circumference of the movable ring seat. The movable ring seat can be fixedly connected to the rotating mandrel through matching locking bolts.

[0028] In this embodiment, a group of tightening compression springs 520 are arranged between the auxiliary static ring and the transition convex ring. The tightening compression springs are arranged sequentially along the circumference of the transition convex ring, and their two ends are respectively engaged with the auxiliary static ring and the transition convex ring, so that the auxiliary static ring is axially positioned by the tightening compression springs.

[0029] In the description of the present utility model, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A container-type mechanical seal device with a radial auxiliary seal structure, characterized in that: include: A fixed ring seat, which is installed in the equipment frame through a connecting piece and has an avoidance shaft hole opened inside; The movable ring seat passes through the avoidance shaft hole and is sleeved on the rotating core shaft, and can rotate in the fixed ring seat along with the rotating core shaft; A fixed ring body, which is installed in the fixed ring seat and corresponds to the position of the movable ring seat; A movable ring body is installed in the movable ring seat and can rotate with the movable ring seat. The axial end faces of the fixed ring body and the movable ring body abut against each other to form an axial sealing surface between the fixed ring body and the movable ring body. An auxiliary static ring, which is installed in the fixed ring seat, and whose inner wall and the outer wall of the movable ring seat are mutually abutted to form a radial sealing surface between the auxiliary static ring and the movable ring seat; The auxiliary pressure ring is installed in the fixed ring seat and abuts against the axial end face of the auxiliary static ring.

2. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: A connecting flange is provided at the outer end of the fixed ring seat, which extends along the circumference of the fixed ring seat and protrudes radially toward the outside of the fixed ring seat. A group of connecting holes are opened inside the connecting flange, and the connecting holes are evenly arranged along the circumference of the connecting flange.

3. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: An adapter convex ring is provided on the inner wall of the fixed ring seat, which extends along the circumference of the fixed ring seat and protrudes radially toward the inner side of the fixed ring seat. The fixed ring body is installed on the axial inner end face of the adapter convex ring and exposed from the circumferential inner end face of the fixed ring seat. The auxiliary static ring is installed on the axial outer end face of the adapter convex ring.

4. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: A limiting shoulder is provided at the axial inner end of the movable ring seat, and the limiting shoulder extends along the circumference of the movable ring seat, protrudes radially toward the outer side of the movable ring seat, and corresponds to the position of the fixed ring body, and the movable ring body is installed on the limiting shoulder.

5. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: A group of baffle grooves are provided on the inner wall of the auxiliary static ring. Each baffle groove extends along the circumference of the auxiliary static ring and is arranged in sequence along the axial direction of the auxiliary static ring to form a radial baffle space between the movable ring seat and the baffle groove.

6. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: The side wall of the movable ring seat is provided with locking bolt holes, which are arranged in sequence along the circumference of the movable ring seat.

7. The container-type mechanical seal device with radial auxiliary seal structure according to claim 1, characterized in that: A group of tightening compression springs are arranged between the auxiliary static ring and the transfer convex ring. The tightening compression springs are arranged in sequence along the circumference of the transfer convex ring, and two ends thereof are respectively in contact with the auxiliary static ring and the transfer convex ring.

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