CN-224229248-U - Mechanical sealing device for three-end-face bellows

Abstract

The utility model relates to the technical field of corrugated pipe mechanical sealing devices and discloses a three-end-face corrugated pipe mechanical sealing device which comprises a first corrugated pipe assembly, a first movable ring, a first gland, a second corrugated pipe assembly, a second movable ring, a flow guiding sleeve, a third corrugated pipe assembly, a static ring and a shaft sleeve, wherein a first cavity is formed among the first corrugated pipe assembly, the first movable ring and the side wall of the shaft sleeve, a second cavity is formed among the third corrugated pipe assembly, the static ring, the first gland, the first corrugated pipe assembly and the first movable ring, a third cavity is formed among the second corrugated pipe assembly, the second movable ring, the third corrugated pipe assembly and the static ring, and interfaces are formed on the side wall of the second cavity and the side wall of the third cavity. The utility model adopts a mode that the second corrugated pipe group and the third corrugated pipe group are overlapped along the circumferential radial direction of the cross section of the utility model, and the third corrugated pipe group is added while the whole axial distance of the seal is not increased, so that the three-end-face corrugated pipe mechanical sealing device is formed.

Inventors

• WANG HUI

Assignees

• 丹东锦达密封有限公司

Dates

Publication Date

20260512

Application Date

20250520

Claims (4)

1. 1. The three-end bellows mechanical sealing device is characterized by comprising a first bellows assembly (1), a first movable ring (2), a first gland (6), a second bellows assembly (8), a second movable ring (9), a flow guiding sleeve (12), a third bellows assembly (13), a static ring (14) and a shaft sleeve (20); The first corrugated pipe assembly (1), the first movable ring (2), the second corrugated pipe assembly (8), the second movable ring (9) and the third corrugated pipe assembly (13) are sleeved on the outer side face of the shaft sleeve (20), one end face of the first corrugated pipe assembly (1) abuts against the side wall of the first gland (6), the other end face of the first corrugated pipe assembly (1) abuts against one end face of the first movable ring (2), the other end face of the first movable ring (2) abuts against the side wall of the first gland (6), one end face of the second movable ring (9) abuts against one end face of the second corrugated pipe assembly (8), one end of the third corrugated pipe assembly (13) abuts against the static ring (14), the flow guide sleeve (12) is sleeved on the second corrugated pipe assembly (8), and the static ring (14) is sleeved on the flow guide sleeve (12); The novel corrugated pipe comprises a first corrugated pipe assembly (1), a first cavity (21) formed between the first movable ring (2) and the side wall of a shaft sleeve (20), a third corrugated pipe assembly (13), a static ring (14), a first gland (6), a second cavity (22) formed between the first corrugated pipe assembly (1) and the first movable ring (2), a third cavity (23) formed between the second corrugated pipe assembly (8), the second movable ring (9), the third corrugated pipe assembly (13) and the static ring (14), and interfaces formed on the side wall of the second cavity (22) and the side wall of the third cavity (23).
2. 2. The three-terminal bellows mechanical seal device according to claim 1, further comprising a first moving ring seal (3), a gasket (7), a second moving ring seal (10) and a seal ring (18); A sealing gasket (7) is arranged between the first corrugated pipe assembly (1) and the first gland (6), the first moving ring sealing ring (3) is arranged between the first moving ring (2) and the shaft sleeve (20), the second moving ring sealing ring (10) is arranged between the second moving ring (9) and the shaft sleeve (20), and a sealing ring (18) is arranged between the third corrugated pipe assembly (13) and the shaft sleeve (20).
3. 3. The three-terminal bellows mechanical sealing device according to claim 1 is characterized in that a second gland (17) is sleeved on the outer side wall of the stationary ring (14), a stationary ring sealing ring (15) is arranged between the second gland (17) and the stationary ring (14), and the stationary ring (14) is connected with the second gland (17) through an anti-rotation pin (16).
4. 4. A three-terminal bellows mechanical seal according to claim 3, characterized in that the first bellows assembly (1) is connected to the first gland (6) by a first screw (5), the first moving ring (2) is connected to the sleeve (20) by a first driving pin (4), the second moving ring (9) is connected to the sleeve (20) by a second driving pin (11), the third bellows assembly (13) is connected to the sleeve (20) by a second screw (19), and the stationary ring (14) is connected to the second gland (17) by an anti-rotation pin (16).

Description

Mechanical sealing device for three-end-face bellows Technical Field The utility model relates to the technical field of corrugated pipe mechanical sealing devices, in particular to a three-end-face corrugated pipe mechanical sealing device. Background The mechanical seal is used for dynamic sealing of the extension shaft of the rotating equipment such as a pump, a compressor and the like, when inflammable, explosive, toxic and harmful mediums are conveyed, in order to ensure the operation safety of the equipment and prevent the medium from leaking to pollute the environment, multiple isolation is carried out on the conveyed mediums, namely, a plurality of mechanical seal end faces are added to the mechanical seal to form a combined sealing device, and isolating liquid, buffer liquid and the like are added to independent cavities formed in the combined sealing device, so that the pressure, the liquid level, the temperature and the like of the isolating liquid and the buffer liquid are monitored in real time, the operation condition of the mechanical seal device is obtained, and the change of various parameters is timely controlled, so that the occurrence of problems is avoided, the zero leakage of the mediums is effectively ensured, and the stable operation of the equipment is ensured. In order to solve the above problems, we propose a three-terminal bellows mechanical seal device. Disclosure of utility model The utility model aims to provide a three-terminal bellows mechanical sealing device which is used for solving the problems in the background technology. In order to achieve the aim, the utility model provides the technical scheme that the three-terminal bellows mechanical sealing device comprises a first bellows component, a first movable ring, a first gland, a second bellows component, a second movable ring, a flow guiding sleeve, a third bellows component, a static ring and a shaft sleeve; The first corrugated pipe assembly, the first movable ring, the second corrugated pipe assembly, the second movable ring and the third corrugated pipe assembly are all sleeved on the outer side surface of the shaft sleeve, one end surface of the first corrugated pipe assembly is propped against the side wall of the first gland, the other end surface of the first corrugated pipe assembly is propped against one end surface of the first movable ring, the other end surface of the first movable ring is propped against the side wall of the first gland, one end surface of the second movable ring is propped against one end surface of the second corrugated pipe assembly, one end of the third corrugated pipe assembly is propped against the static ring, the flow guiding sleeve is sleeved on the second corrugated pipe assembly, and the static ring is sleeved on the flow guiding sleeve; The first corrugated pipe assembly, the first moving ring and the side wall of the shaft sleeve form a first cavity, the third corrugated pipe assembly, the stationary ring, the first gland, the first corrugated pipe assembly and the first moving ring form a second cavity, the second corrugated pipe assembly, the second moving ring, the third corrugated pipe assembly and the stationary ring form a third cavity, and the side wall of the second cavity and the side wall of the third cavity are provided with interfaces. Preferably, the sealing device further comprises a first movable ring sealing ring, a sealing gasket, a second movable ring sealing ring and a sealing ring; A sealing gasket is arranged between the first corrugated pipe assembly and the first gland, the first moving ring sealing ring is arranged between the first moving ring and the shaft sleeve, the second moving ring sealing ring is arranged between the second moving ring and the shaft sleeve, and a sealing ring is arranged between the third corrugated pipe assembly and the shaft sleeve. Preferably, the outer side wall of the stationary ring is sleeved with a second gland; a stationary ring sealing ring is arranged between the second gland and the stationary ring, and the stationary ring is connected with the second gland through an anti-rotation pin. Preferably, the first bellows assembly is connected with the first gland through a first screw, the first movable ring is connected with the shaft sleeve through a first transmission pin, the second movable ring is connected with the shaft sleeve through a second transmission pin, the third bellows assembly is connected with the shaft sleeve through a second screw, and the stationary ring is connected with the second gland through an anti-rotation pin. Compared with the prior art, the three-end-face corrugated pipe mechanical sealing device has the beneficial effects that the third corrugated pipe group is added while the whole axial distance of the seal is not increased in a mode that the second corrugated pipe group and the third corrugated pipe group are overlapped along the circumferential radial direction of the cross section of