CN201687732U

CN201687732U - Centrifugal pump

Info

Publication number: CN201687732U
Application number: CN2010202024309U
Authority: CN
Inventors: 于俊田; 张玲; 田兆君; 王洛
Original assignee: LONGKOU fur BIOCHEMICAL TECHNOLOGY Co Ltd
Current assignee: SHANDONG FUER CO., LTD.
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2010-12-29
Anticipated expiration: 2020-05-25

Abstract

The utility model aims to provide a centrifugal pump, which leads the inside of a packing box to be sealed mechanically, prevents liquid inside a pump body from draining outwards and has fine sealing effect. The centrifugal pump comprises a base, a motor and the pump body, the motor and the pump body are fixed on the base, a spindle, an impeller, a bearing and a shaft sealing device are disposed in the pump body, one end of the spindle extends out of the pump body and is connected with the motor via a coupler, the other end of the spindle is connected with the impeller inside the pump body, the shaft sealing device consists of a sealing box and a mechanical sealing gland, the sealing box is disposed at a position close to the impeller, one side of the sealing box is fixed to the pump body while the other side is provided with the mechanical sealing gland, the mechanical sealing gland is fixed with the sealing box via bolts, the spindle in the sealing box is sequentially provided with a shaft sleeve, a press ring and a movable ring from left to right, the inside of the mechanical sealing gland is provided with a static ring, and the static ring tightly contacts with the movable ring. The inside of the sealing box is sealed mechanically by means of matching the static ring with the movable ring, liquid in the pump body can not be drained outwards, and the centrifugal pump accomplishes excellent sealing effect.

Description

Centrifugal pump

Technical field

The utility model relates to the pump that is applicable to the special fluid of conveying, relates in particular to a kind of centrifugal pump.

Background technique

In the prior art, centrifugal pump is made up of the pump housing, impeller, stuffing box packing case etc., and Stuffing box is made up of component such as water ring, filler (oily husky line) glands.The effect of stuffing box packing case mainly is to play seal action when the centrifugal pump proper functioning, guarantees that the liquid in the pump housing does not leak, and avoids causing waste and pollution.Because the filler of Stuffing box is oily husky line, abrasion resistance is poor, and running a period of time will occur causing the liquid in the pump housing to flow out because of the wearing and tearing of the husky line of oil are loosening.For the pollution and the waste that do not cause environment just must be changed the filler of Stuffing box again in termination of pumping.Because Chemical Manufacture is to work continuously, and is closely linked, which platform pump all must all stop, and like this production is caused very big influence, has also increased labor intensity simultaneously.

The model utility content

For addressing the above problem, the utility model provides and adopts mechanical seal in a kind of Stuffing box, and the liquid in the pump housing does not leak the centrifugal pump of good sealing effect.

Centrifugal pump of the present utility model, comprise support, be fixed on the motor and the pump housing on the support, described pump housing inside is provided with main shaft, impeller, bearing and gland seal device, one end of described main shaft stretches out outside the pump housing and by coupling and links to each other with motor, impeller in the other end of main shaft and the pump housing is connected, bearing is contained on the main shaft and by the bearing gland and the pump housing and fixes, described gland seal device comprises sealed case and machine sealed cover, sealed case is arranged near the impeller place, one side of sealed case is fixed on the pump housing, and the opposite side of sealed case is provided with the machine sealed cover, and the machine sealed cover is fastening by bolt and sealed case, on the main shaft in the described sealed case axle sleeve is housed successively from left to right, pressure ring and rotating ring, be provided with spring between pressure ring and the rotating ring, stationary ring is equipped with in the inboard of described machine sealed cover, and stationary ring is close to rotating ring and contacts.

Centrifugal pump of the present utility model is provided with seal ring between machine sealed cover and the stationary ring.

The beneficial effect of the utility model centrifugal pump is: the mechanical seal of adopting stationary ring and rotating ring to cooperate in the utility model sealed case, the liquid in the pump housing does not leak good sealing effect.In the gland seal device in the course of the work stationary ring and rotating ring be to do lubricatedly by the medium in the pump, the effect of spring is a dynamics of strengthening quiet rotating ring contact seal, guarantees that liquid does not leak, the effect of bolt is the solid mechanical sealing, guarantees the stability of mechanical seal.

Description of drawings

Fig. 1 is the sectional view of the utility model centrifugal pump;

Fig. 2 is the partial enlarged drawing at A place among Fig. 1.

Embodiment

Below in conjunction with Figure of description the utility model centrifugal pump is described further.

Referring to Fig. 1 and Fig. 2, centrifugal pump of the present utility model, comprise support 16, be fixed on the motor 1 and the pump housing 9 on the support 16, the pump housing 9 inside are provided with main shaft 4, impeller 10, bearing 3 and gland seal device 17, one end of main shaft 4 stretches out the pump housing 9 outer coupling 2 that also pass through and links to each other with motor 1, impeller 10 in the other end of main shaft 4 and the pump housing 9 is connected, bearing 3 is contained on the main shaft 4 and by the bearing gland 5 and the pump housing 9 and fixes, gland seal device 17 comprises sealed case 18 and machine sealed cover 6, sealed case 18 is arranged near impeller 10 places, one side of sealed case 18 is fixed on the pump housing 9, the opposite side of sealed case 18 is provided with machine sealed cover 6, machine sealed cover 6 is fastening by bolt 7 and sealed case 18, on the main shaft 4 in the sealed case 18 axle sleeve 8 is housed successively from left to right, pressure ring 11 and rotating ring 13, be provided with spring 12 between pressure ring 11 and the rotating ring 13, stationary ring 14 is equipped with in the inboard of machine sealed cover 6, stationary ring 14 is close to rotating ring 13 and contacts, when work, reach the purpose of sealing thereby rotating ring 13 and stationary ring 14 are done relative motion, be provided with D RunddichtringO 15 between machine sealed cover 6 and the stationary ring 14.

In the gland seal device described in the utility model; selecting for use of the material of stationary ring 14 and rotating ring 13 is to decide according to working medium; the nonflammable explosive alloy of selecting for use; the inflammable and explosive silicon carbide of selecting for use; the advantage of these two kinds of materials is that toughness is strong; wear-resisting; anticorrosive; stationary ring 14 and rotating ring 13 are to do lubricated by the medium in the pump in the course of the work; the effect of spring 12 is dynamics of strengthening stationary ring 14 and rotating ring 13 contact seals; guarantee that liquid does not leak; the effect of D RunddichtringO 15 is surface of contact of sealing stationary ring 14 and machine sealed cover 6; guarantee that liquid does not leak outside, the effect of bolt 7 is solid mechanical sealings, guarantees the stability of mechanical seal.

Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in related domain make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.

Claims

1. centrifugal pump, comprise support (16), be fixed on the motor (1) and the pump housing (9) on the support (16), the described pump housing (9) inside is provided with main shaft (4), impeller (10), bearing (3) and gland seal device (17), one end of described main shaft (4) stretches out the outer coupling (2) that also passes through of the pump housing (9) and links to each other with motor (1), impeller (10) in the other end of main shaft (4) and the pump housing (9) is connected, bearing (3) is contained in main shaft (4) and upward and by the bearing gland (5) and the pump housing (9) fixes, described gland seal device (17) comprises sealed case (18) and machine sealed cover (6), sealed case (18) is arranged near impeller (10) and locates, one side of sealed case (18) is fixed on the pump housing (9), the opposite side of sealed case (18) is provided with machine sealed cover (6), machine sealed cover (6) is fastening by bolt (7) and sealed case (18), it is characterized in that: on the main shaft (4) in the described sealed case (18) axle sleeve (8) is housed successively from left to right, pressure ring (11) and rotating ring (13), be provided with spring (12) between pressure ring (11) and the rotating ring (13), stationary ring (14) is equipped with in the inboard of described machine sealed cover (6), and stationary ring (14) is close to rotating ring (13) and contacts.

2. centrifugal pump according to claim 1 is characterized in that: be provided with seal ring (15) between described machine sealed cover (6) and the stationary ring (14).