CN201196263Y

CN201196263Y - Mechanical sealing device

Info

Publication number: CN201196263Y
Application number: CNU200820087931XU
Authority: CN
Inventors: 李友宝; 励永平; 励才勋; 董军锋
Original assignee: NINGBO DONGLIAN SEALING PARTS CO Ltd
Current assignee: NINGBO DONGLIAN SEALING PARTS CO Ltd
Priority date: 2008-05-23
Filing date: 2008-05-23
Publication date: 2009-02-18
Anticipated expiration: 2018-05-23

Abstract

The utility model discloses a mechanical seal device, which comprises a dynamic ring component and a static ring component which comprises a static ring (2) and a static ring pad (1), wherein the static ring component is closely matched with a pump body (10), one end of a rubber bellows (5) is closely matched with a shaft (9), a spring seat (8) is closely matched with the end of the rubber bellows (5), an end surface of a dynamic ring (3) is closely abutted with the end surface of the static ring (2), one end of a lining ring (8) is equipped with an axial groove, one end surface of the dynamic ring (3) is equipped with an axial recessed cavity, one end of a dynamic ring seat (4) is equipped with a radial port, the dynamic ring (3), the rubber bellows (5) and a lining ring (6) are closely pressed at the axial direction by the radial port which is arranged on one end of the dynamic ring seat (4) and an end surface of the other end of the dynamic ring seat (4), which is vertical to the shaft (9), one end of a cone spring (7) closely against on a step surface of the spring seat (8), and the other end closely against in the axial groove of the lining ring (6). The axial size of the mechanical seal device is smaller.

Description

Mechanical seal device

Technical field

The utility model relates to a kind of mechanical seal device that is used for centrifugal pump, clean waterpump etc., specifically is a kind of mechanical seal device that prevents that working fluid from leaking along running shaft.

Background technique

The mechanical seal device of prior art comprises by rotating ring, rubber corrugated pipe, rotating seat, moving ring assembly that spring seat and spring are formed and the static components of forming by stationary ring and stationary ring pad, static components and pump housing drive fit, rubber corrugated pipe one end and axle drive fit, the inwall of the rubber corrugated pipe the other end and rotating ring outer wall drive fit, the longitudinal section of described rotating seat is the step surface of band perpendicular to the end face of axle, the inwall of rotating seat and rubber corrugated pipe are near the outer wall drive fit of stationary ring one end, the longitudinal section of described spring seat is the step surface of band perpendicular to the end face of axle, spring seat inwall and rubber corrugated pipe are away from the outer wall drive fit of stationary ring one end, in the middle of the described rubber corrugated pipe two perpendicular to the end face of axle respectively with rotating seat and spring seat perpendicular to two end faces of axle near, spring one end is against on the end face of rotating seat perpendicular to axle, the other end of spring is against on the end face of spring seat perpendicular to axle, rotating ring one end face the effect of spring and stationary ring away from the end face of stationary ring pad near.

There is following defective in the seal arrangement of above structure: described moving ring assembly axial dimension is bigger, is not suitable for the less pump of axial dimension.

The model utility content

The technical problems to be solved in the utility model is to provide a kind of axial dimension less mechanical seal device.

Technical solution of the present utility model is, a kind of mechanical seal device is provided, comprise by rotating ring, rubber corrugated pipe, rotating seat, inner bushing ring, moving ring assembly that spring seat and spring are formed and the static components of forming by stationary ring and stationary ring pad, static components and pump housing drive fit, one end of rubber corrugated pipe and axle drive fit, spring seat and rubber corrugated pipe should be held drive fit, rotating ring one end face the effect of spring and stationary ring away from the end face of stationary ring pad near, rotating ring is provided with axial cavity away from the end face of stationary ring, rotating seat has radially closing in away from the end of stationary ring one end, and the inwall of rotating seat and rotating ring, the outer wall drive fit of rubber corrugated pipe and inner bushing ring, the end face that the radially closing in of rotating seat one end and the other end are square with the axis is with rotating ring, rubber corrugated pipe and inner bushing ring axial compression, described inner bushing ring is provided with axial notch away from an end of stationary ring, described spring is a volute spring, volute spring one end pushes against on a step surface of spring seat, and the other end pushes against in the axial notch of inner bushing ring.

After adopting above structure, the utility model mechanical seal device compared with prior art has the following advantages:

Because rotating ring is provided with axial cavity away from the end face of stationary ring, during the moving ring assembly axial compression, the fold that bearing produces can be contained in the cavity, so effectively shortened the axial dimension of seal arrangement.Again owing to adopted volute spring, and the axial dimension of the axial dimension of volute spring after pressing after less than the cylindrical spring compression, so further shortened the axial dimension of seal arrangement.

Description of drawings

Accompanying drawing is the sectional structure schematic representation of the utility model mechanical seal device.

Shown in the figure 1, the stationary ring pad, 2, stationary ring, 3, rotating ring, 4, rotating seat, 5, rubber corrugated pipe, 6, inner bushing ring, 7, volute spring, 8, spring seat, 9, axle, 10, the pump housing.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

The utility model mechanical seal device comprises moving ring assembly of being made up of rotating ring 3, rubber corrugated pipe 5, rotating seat 4, inner bushing ring 6, spring seat 8 and spring and the static components of being made up of stationary ring 2 and stationary ring pad 1 as shown in Figure 1.Static components and the pump housing 10 drive fits.One end of rubber corrugated pipe 5 and axle 9 drive fits, spring seat 8 should the end drive fit with rubber corrugated pipe 5.Rotating ring 3 one end faces (left side among the figure) the effect of spring and stationary ring 2 away from the end face of stationary ring pad 1 near, rotating ring 3 is provided with axial cavity away from the end face of stationary ring 2.Rotating seat 4 has radially closing in away from the end of stationary ring 2 one ends, and the inwall of rotating seat 4 respectively with the outer walls in the big footpath of rotating ring 3, the outer wall in rubber corrugated pipe 5 big footpaths and the outer wall drive fit of inner bushing ring 6, rotating seat 4 one ends radially close up and end face that rotating seat 4 the other ends are vertical with spools 9 with rotating ring 3, rubber corrugated pipe 5 and inner bushing ring 6 axial compression, be rotating seat 4 near the end face applying vertical of the vertical end face of stationary ring 2 one ends and axle 9 and rotating ring 3 with spools 9, rotating ring 3 is fitted away from the step surface and the rubber corrugated pipe 5 of stationary ring 2 one ends, and inner bushing ring 6 is also fitted with rubber corrugated pipe 5, and the radially closing in of rotating seat 4 one ends is pressed on the inner bushing ring 6.Described inner bushing ring 6 is provided with axial notch away from an end of stationary ring 2, and described spring is a volute spring 7, and volute spring 7 one ends push against on a step surface of spring seat 8, and the other end pushes against on the step surface of inner bushing ring 6 axial notches.

Claims

1. mechanical seal device, comprise by rotating ring (3), rubber corrugated pipe (5), rotating seat (4), moving ring assembly that spring seat (8) and spring are formed and the static components of forming by stationary ring (2) and stationary ring pad (1), the static components and the pump housing (10) drive fit, one end of rubber corrugated pipe (5) and axle (9) drive fit, spring seat (8) and this end drive fit of rubber corrugated pipe (5), rotating ring (3) one end faces the effect of spring and stationary ring (2) away from the end face of stationary ring pad (1) near, it is characterized in that: described moving ring assembly also comprises inner bushing ring (6), described inner bushing ring (6) is provided with axial notch away from an end of stationary ring (2), rotating ring (3) is provided with axial cavity away from the end face of stationary ring (2), rotating seat (4) has radially closing in away from the end of stationary ring (2) one ends, and the inwall of rotating seat (4) and rotating ring (3), the outer wall drive fit of rubber corrugated pipe (5) and inner bushing ring (6), the radially closing in of rotating seat (4) one ends and rotating seat (4) the other end end face vertical with axle (9) is with rotating ring (3), rubber corrugated pipe (5) and inner bushing ring (6) axial compression, described spring is volute spring (7), volute spring (7) one ends push against on a step surface of spring seat (8), and the other end pushes against in the axial notch of inner bushing ring (6).