CN-224229244-U - Packaging type mechanical seal

CN224229244UCN 224229244 UCN224229244 UCN 224229244UCN-224229244-U

Abstract

The utility model relates to a container type mechanical seal which is arranged on a shaft sleeve through a mechanical seal mounting sleeve, wherein the mechanical seal comprises a movable ring, a stationary ring spring and a sealing box, a cooling water inlet and a cooling water outlet are arranged on the sealing box, the movable ring is in sleeve type, the movable ring is in hooking connection or buckling connection with the mechanical seal mounting sleeve, a plurality of sealing rings are arranged between the inner wall of the movable ring and the periphery of the shaft sleeve, a push ring is arranged on one side of the sealing rings, a movable ring side without the push ring is arranged on the position, opposite to the mechanical seal mounting sleeve, of the joint of the movable ring and the stationary ring, and a movable ring thrust ring is arranged. The integrated mechanical seal has the advantages that the diameters of the movable ring and the stationary ring of the mechanical seal can be reduced, the appearance of the mechanical seal is smaller, the PVS value is lower, the service life is longer, the sealing performance between the inner wall of the movable ring and the spindle shaft sleeve is improved, the movable ring of the mechanical seal cannot axially float, and the manufacturing cost of the mechanical seal is low.

Inventors

JIANG LONGFU
GUO DANFENG
JIANG LINGCHAO

Assignees

宜兴市宙斯泵业有限公司

Dates

Publication Date: 20260512
Application Date: 20231029

Claims (10)

1. A container type mechanical seal is characterized in that the mechanical seal is arranged on a shaft sleeve through a mechanical seal mounting sleeve, and comprises a movable ring, a stationary ring spring and a seal box, wherein the seal box is provided with a cooling water inlet and a cooling water outlet; The movable ring is in a sleeve shape, and is in hooking connection or buckling connection with the mechanical seal mounting sleeve; a plurality of sealing rings are arranged between the inner wall of the movable ring and the periphery of the shaft sleeve, and a push-push ring is arranged on one side of each sealing ring; A movable ring thrust ring is arranged on one side of the movable ring, which is not provided with the thrust ring, at the joint of the movable ring and the stationary ring and opposite to the position of the mechanical seal installation sleeve, and an installation ring groove of the movable ring thrust ring is arranged on the mechanical seal installation sleeve; a rigid concave-convex coupling part is arranged between the sleeve-shaped movable ring and the mechanical seal mounting sleeve, and a buffer structure is arranged at the concave-convex coupling part.
2. The integrated mechanical seal according to claim 1, wherein when the movable ring is hooked and connected with the mechanical seal mounting sleeve, an inner convex ring is arranged on the inner peripheral surface of one end of the movable ring, an outer convex ring is arranged on the mechanical seal mounting sleeve, the inner convex ring of the sleeve-shaped movable ring is hooked and connected with the outer convex ring of the mounting sleeve, and a movable ring balance ring is filled in a gap between the outer convex ring and the inner convex ring.
3. The integrated mechanical seal according to claim 2, wherein the movable ring thrust ring is a rubber thrust ring or a metal snap spring thrust ring, the movable ring balance ring is one of an O-shaped ring, a square pad or a flat pad, and the movable ring balance ring is made of rubber.
4. The cartridge type mechanical seal according to claim 1, wherein when the movable ring is in snap connection with the mechanical seal mounting sleeve, a snap ring is arranged between the mechanical seal mounting sleeve and the movable ring in the radial direction, a snap ring outer protrusion is arranged on the outer circumferential surface of the snap ring, a snap ring inner protrusion is arranged on the inner circumferential surface of the snap ring, a concave portion matched with the snap ring inner protrusion is arranged on the outer circumferential surface of the mechanical seal mounting sleeve, a concave portion matched with the snap ring outer protrusion is arranged on the inner circumferential surface of the sleeve-shaped movable ring, the snap ring outer protrusion is clamped with the concave portion of the inner circumferential surface of the sleeve-shaped movable ring, and the snap ring inner protrusion is clamped with the concave portion of the outer circumferential surface of the mechanical seal mounting sleeve.
5. The cartridge type mechanical seal according to claim 4, wherein: The outer flange of the clamping ring is arranged on the end face of the clamping ring; the clamping ring is of a split structure, and is an assembly of the split structures during installation; the snap ring is made of glass fiber reinforced plastic, rubber or plastic; the push ring is of a rigid structure, the mechanical seal installation cylinder sleeve is made of metal, and the shaft sleeve is of a structure that a metal body is externally coated with a shaft sleeve plastic lining layer.
6. The container type mechanical seal according to claim 1, wherein the concave-convex coupling part between the sleeve-shaped moving ring and the mechanical seal mounting sleeve is characterized in that a plurality of concave parts are arranged on the inner periphery of the sleeve-shaped moving ring, a plurality of convex parts are arranged on the outer periphery of the mechanical seal mounting sleeve, the concave parts are in one-to-one corresponding clamping coupling with the convex parts, the buffer structure comprises a buffer collar and buffer sheets, the buffer collar is sleeved in an annular gap where the concave parts are clamped with the convex parts, the buffer sheets are uniformly and vertically fixed on the outer periphery of the buffer collar, and the buffer sheets fill the annular gap where the concave parts are clamped with the convex parts.
7. The integrated mechanical seal according to claim 1, wherein a stationary ring mounting plate made of an anti-corrosion material is arranged on the periphery of the stationary ring, and a stationary ring sealing ring is arranged in a gap between the stationary ring and the stationary ring mounting plate.
8. The container type mechanical seal according to claim 7, wherein the stationary ring mounting plate is made of one material or a composite material of at least two materials of ceramic, plastic and metal materials, and the overflow surface of the stationary ring mounting plate is of a metal-coated plastic structure.
9. The cartridge type mechanical seal according to claim 1, wherein: The sealing box is also provided with a cooling water seal matched with the cooling water inlet and the cooling water outlet, the cooling water seal is of a dynamic and static ring sealing structure, or a sealing structure of a lip-shaped sealing ring is arranged on the shaft sleeve; The sealing box is also fixed on the shaft sleeve through the positioning ring by a positioning screw, and is also provided with a positioning buckle.
10. The cartridge type mechanical seal according to claim 1, wherein the periphery of the mechanical seal mounting sleeve is provided with an axial vertical protruding strip.

Description

Packaging type mechanical seal Technical Field The utility model belongs to the technical field of mechanical sealing, and particularly relates to a container type mechanical seal. Background In the prior art, the anti-corrosion sheath arranged between the inner wall of the movable sleeve and the shaft sleeve of the mechanical seal occupies the radial position of the mechanical seal movable ring, so that the diameter of the mechanical seal movable ring is increased, the total area of the working sealing surfaces of the mechanical seal movable ring and the static ring is increased, the PVS value of the mechanical seal is increased, and the service life of the mechanical seal is shortened; The diameters of the movable ring and the static ring of the mechanical seal technology in the prior art are large, the manufacturing cost of the mechanical seal is high, and the combination of the single-channel O-shaped ring and the two seals in the prior art increases leakage points of the seal in the mechanical seal, so that the seal between the inner wall of the movable ring and the periphery of the mounting shaft sleeve is unreliable. In addition, the movable ring of the mechanical seal can displace towards the static ring under the pressure action of fluid in the pump cavity, the working specific pressure on the movable ring and the static ring working surface is increased, the friction force of the movable ring and the static ring working surface of the mechanical seal is increased, the service life of the mechanical seal is influenced, and especially when a water hammer is generated during the shutdown of the pump, the movable ring is pushed to displace towards the static ring. In summary, there is still a need for further improvement of mechanical seal and improvement of quality. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provides a container type mechanical seal. The integrated mechanical seal is arranged on the shaft sleeve through a mechanical seal mounting sleeve, and comprises a movable ring, a stationary ring spring and a seal box, wherein the seal box is provided with a cooling water inlet and a cooling water outlet; The movable ring is in a sleeve shape, and is in hooking connection or buckling connection with the mechanical seal mounting sleeve; the sealing ring can prevent the liquid conveyed in the pump cavity from leaking out of a gap between the machine seal installation sleeve and the pump main shaft, and can also play a radial fixed positioning role on the sleeve-shaped moving ring; A movable ring thrust ring is arranged on one side of the movable ring, which is not provided with the thrust ring, at the joint of the movable ring and the stationary ring and opposite to the position of the mechanical seal installation sleeve, and an installation ring groove of the movable ring thrust ring is arranged on the mechanical seal installation sleeve; the sealing and pressing force of the working surfaces of the movable ring and the static ring is effectively controlled, the stability of the specific pressure between the movable ring and the static ring is ensured, the movable ring of the mechanical seal can be prevented from damaging the working surface of the static ring by the axial displacement of the movable ring under the impulse fluid pressure impact of a pump cavity water hammer; a rigid concave-convex coupling part is arranged between the sleeve-shaped movable ring and the mechanical seal mounting sleeve, and a buffer structure is arranged at the concave-convex coupling part. When the movable ring is hooked and connected with the mechanical seal installation cylinder sleeve, an inner convex ring is arranged on the inner peripheral surface of one end of the movable ring, an outer convex ring is arranged on the mechanical seal installation cylinder sleeve, the inner convex ring of the cylinder sleeve-shaped movable ring is hooked on the outer convex ring of the installation cylinder sleeve, and a movable ring balance ring is filled in a gap between the outer convex ring and the inner convex ring, so that the working surface of the movable ring has good axial balance capability. The annular inner convex ring is provided with two purposes, namely, a groove is formed in the inner convex ring, the groove is matched with an outer convex ring on a metal installation sleeve of the machine seal during installation of the machine seal to achieve the effect of transmitting the rotation torque force of the machine seal, and the inner convex ring of the movable ring is simultaneously provided with a complete step which is hooked with the step on the outer convex ring of the installation sleeve, so that the movable ring can be hooked and fixed on the installation sleeve. The movable ring thrust ring is preferably a rubber thrust ring or a metal snap spring thrust ring; the movable ring balance ring is one of an O-shaped ring, a square pad or a flat pad, and is ma