CN204402968U - Self-equilibrating stresses mechanical seal device - Google Patents

Abstract

The utility model discloses a self-balancing force mechanical sealing device, which solves the problem that the mechanical sealing device is easily damaged when working in an environment with relatively high pressure of a liquid medium. It also includes a gland and a sealing sleeve. The static ring seat, the moving ring seat, the gland and the sealing sleeve constitute a sealing liquid cavity, and a liquid injection hole is opened on the sealing sleeve. The liquid injection hole is equipped with a corresponding plug; there is also a stepped sealing push ring between the moving ring near the impeller end and the moving ring seat, and a corresponding push spring is also matched between the stepped sealing pushing ring and the moving ring seat; the stepped sealing A rubber sealing ring is also arranged at the joint between the push ring and the moving ring seat. The self-balancing force mechanical seal device of the utility model, through the action of the push spring, the stepped sealing push ring, etc., when in use, the whole device is in the medium liquid, and the medium liquid enters the stepped cavity of the stepped sealing push ring, that is On the left side of the moving ring, the media on the left and right sides of the moving ring are connected in liquid, and the pressures generated are offset, preventing the moving ring from being deformed and damaged only by the pressure of the medium on the right side.

Description

Self-balancing force mechanical seal device

technical field

The utility model relates to a sealing device, in particular to a self-balancing force mechanical sealing device which is mainly used for automatically balancing the pressure of a liquid medium to reduce mechanical damage when the medium pressure is greater than the blocking water pressure.

Background technique

The self-balancing force mechanical seal device is suitable for mining, metallurgy and other industries with high conveying pressure and high concentration of solid particles in the medium. Due to the lack of water resources in mining and metallurgy industries, the pressure of the sealing water equipped cannot meet the requirements for the use of mechanical seals. The sealing surface is pushed away by the medium pressure and affects the service life of the mechanical seal. The mechanical seal currently used is a common double-face structure in which the pressure of the blocking water is higher than the pressure of the liquid medium. When the pressure of the blocking water is lower than the pressure of the liquid medium for some reason, the sealing surface is easily pushed away by the pressure of the liquid medium, resulting in severe Wear phenomenon, so that the life of the mechanical seal is short, which cannot meet the user's requirements.

Utility model content

In order to overcome the above-mentioned technical defects, the purpose of this utility model is to provide a self-balancing force mechanical seal device that automatically balances the pressure of the liquid medium to reduce mechanical damage.

In order to achieve the above object, the utility model is realized through the following technical solutions: the self-balancing force mechanical seal device includes a rotating shaft and a shaft sleeve set on the rotating shaft, and a static ring seat and a ring seat are arranged on the shaft sleeve from the left section and the right section The moving ring seat, and the static ring seat is matched with a corresponding static ring, the moving ring seat is matched with a corresponding moving ring, and the right end of the rotating shaft is connected with an impeller; it also includes a gland and a sealing sleeve, the static ring seat, The moving ring seat, the gland and the sealing sleeve constitute the sealing liquid cavity, and a liquid injection hole is opened on the sealing sleeve, and the liquid injection hole is equipped with a corresponding plug; the moving ring near the impeller end and the moving ring seat are also matched. There is a stepped sealing push ring, and a corresponding push spring is matched between the stepped sealing pushing ring and the moving ring seat; a rubber sealing ring is also arranged at the joint between the stepped sealing pushing ring and the moving ring seat.

Rubber sealing rings are provided between the gland and the static ring seat, between the gland and the sealing sleeve, and between the shaft sleeve and the impeller.

The beneficial effects of the utility model are: the self-balancing force mechanical sealing device of the utility model, through the action of the push spring, the stepped sealing push ring, etc., when in use, the whole device is in the medium liquid, and the medium liquid enters the stepped sealing push ring. In the stepped cavity of the ring, that is, on the left side of the moving ring, the medium liquid on the left and right sides of the moving ring is connected, and the pressure generated is offset, which prevents the moving ring from being deformed and damaged only by the pressure of the medium on the right side.

Description of drawings

Fig. 1 is the structural representation of the self-balancing force mechanical seal device of the present utility model;

In the figure, 1—rotating shaft, 2—shaft sleeve, 3—gland, 4—moving ring seat, 6—push spring, 7—rubber sealing ring, 8—liquid injection hole, 9—sealing sleeve, 10—static ring Seat, 11—impeller, 12—sealing push ring, 13—moving ring, 14—static ring.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following description.

As shown in Figure 1, the self-balancing force mechanical seal device of the present utility model includes a rotating shaft 1 and a shaft sleeve 2 sleeved on the rotating shaft 1, and a static ring seat 10 is arranged on the shaft sleeve 2 from the left section and the right section. And the moving ring seat 4, and the static ring seat 10 is matched with a corresponding static ring 14, the moving ring seat 4 is matched with a corresponding moving ring 13, the right end of the rotating shaft 1 is connected with an impeller 11; it also includes a gland 3 and a sealing The sleeve 9, the static ring seat 10, the moving ring seat 4, the gland 3 and the sealing sleeve 9 constitute the sealing liquid cavity, and the sealing sleeve 9 is provided with a liquid injection hole 8, and the liquid injection hole 8 is matched with a corresponding plug; between the moving ring 13 near the end of the impeller 11 and the moving ring seat 4, there is also a stepped sealing push ring 12, and a corresponding push spring is also matched between the stepped sealing pushing ring 12 and the moving ring seat 4 6. A rubber sealing ring 7 is also provided at the joint between the stepped sealing push ring 12 and the moving ring seat 4 . The self-balancing force mechanical seal device of the present utility model, through the action of the push spring 6, the stepped sealing push ring 12, etc., when in use, the whole device is in the medium liquid, and the medium liquid enters the stepped cavity of the stepped sealing push ring 12 In the center, that is, on the left side of the moving ring 13, the left and right sides of the moving ring 13 are connected with the medium liquid, and the pressures generated are offset, which prevents the moving ring 13 from being deformed and damaged only by the pressure of the medium on the right side. It is worth noting that the blocking fluid in the blocking fluid cavity cooperates with the reasoning spring 6 to maintain the seal between the moving ring 13 and the static ring 14 .

Preferably, rubber sealing rings 7 are provided between the gland 3 and the static ring seat 10, between the gland 3 and the sealing sleeve 9, and between the shaft sleeve 2 and the impeller 11, which improves the sealing performance and prolongs the the service life of the entire device.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (2)

1. self-equilibrating stresses mechanical seal device, it is characterized in that: comprise rotating shaft (1) and be sleeved on the axle sleeve (2) in this rotating shaft (1), axle sleeve (2) is provided with stationary seat (10) and rotating seat (4) from left section and right section, and stationary seat (10) is combined with corresponding stationary ring (14), rotating seat (4) is combined with corresponding rotating ring (13), and described rotating shaft (1) right-hand member is connected with impeller (11); Also include gland (3) and stuffing box gland (9), described stationary seat (10), rotating seat (4), gland (3) and stuffing box gland (9) form resistance sealing liquid cavity, stuffing box gland (9) offers liquid filling hole (8), and this liquid filling hole (8) is combined with corresponding plug; Also be combined with stepped sealing push ring (12) between the rotating ring (13) held near impeller (11) and rotating seat (4), between this stepped sealing push ring (12) and rotating seat (4), be also combined with corresponding goring push spring (6); Described stepped sealing push ring (12) and rotating seat (4) cooperation place are also provided with rubber seal (7).

2. self-equilibrating stresses mechanical seal device according to claim 1, is characterized in that: between described gland (3) and stationary seat (10), be provided with rubber seal (7) between gland (3) and stuffing box gland (9) and between axle sleeve (2) and impeller (11).