CN210317777U

CN210317777U - Axial suction multistage pump

Info

Publication number: CN210317777U
Application number: CN201921357696.8U
Authority: CN
Inventors: 南凌; 高速隆; 郭晓军; 顾健华; 王有力
Original assignee: Wuxi Dexibi Intelligent Fluid Technology Co Ltd
Current assignee: Wuxi Dexibi Intelligent Fluid Technology Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-04-14
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses an axial suction multistage pump, which comprises a pump shaft, wherein the front end of the pump shaft is provided with a sliding bearing; a suction section shell is arranged on the outer side of the sliding bearing, an axial suction port is formed in the suction section shell, and a first middle section shell, a second middle section shell and a discharge section shell are further arranged on the outer side of the pump shaft; a first impeller and a first guide vane are arranged between the suction section shell and the first middle section shell; a second impeller and a second guide vane are arranged between the first middle section shell and the second middle section shell; and a third impeller and a third guide vane are arranged between the second middle section shell and the spitting section shell. The utility model discloses set up the suction mode into the axial and inhale, increased water conservancy efficiency, both ends set up slide bearing and bearing box separately and realize that both ends support, have reduced manufacturing cost and use cost, have reduced area.

Description

Axial suction multistage pump

Technical Field

The utility model relates to a pump specifically is an axial suction multistage pump.

Background

The traditional multistage pump is supported at two ends, the two ends are respectively provided with a bearing box component, and two sets of sealing components are arranged, if the number of stages is small, such as 3-6 stages of impellers, two bearing box components and two sets of sealing components are also arranged, and the manufacturing cost of the structure is greatly increased compared with that of a single-stage centrifugal pump. In addition, because two bearing box parts are used, the occupied area is large when the water pump is used by a user, in addition, the water inlet is arranged at two ends or is vertically upward, the inlet pipeline needs one more elbow to be connected into the pump body, and the use cost of the user is also increased.

SUMMERY OF THE UTILITY MODEL

For solving the defect of above-mentioned prior art, the utility model provides an axial suction multistage pump, the utility model discloses set up the suction mode into the axial and inhale, increased water conservancy efficiency, both ends set up slide bearing and bearing box separately and realize that both ends support, have reduced manufacturing cost and use cost, have reduced area.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: an axial suction multistage pump comprises a pump shaft, wherein a sliding bearing is arranged at the front end of the pump shaft; a suction section shell is arranged on the outer side of the sliding bearing, an axial suction port is formed in the suction section shell, and a first middle section shell, a second middle section shell and a discharge section shell are further arranged on the outer side of the pump shaft;

a first impeller and a first guide vane are arranged between the suction section shell and the first middle section shell; a second impeller and a second guide vane are arranged between the first middle section shell and the second middle section shell; a third impeller and a third guide vane are arranged between the second middle section shell and the spitting section shell;

the first impeller, the second impeller and the third impeller respectively comprise a front cover plate, blades, a rear cover plate and a hub, and the rear cover plate is fixedly connected to the middle part of the hub; the front cover plate is provided with a second wear-resistant sleeve, the hub is provided with a first wear-resistant sleeve, and the first wear-resistant sleeve and the second wear-resistant sleeve are respectively provided with a first bulge and a second bulge; the inner end parts of the first guide vane and the second guide vane are respectively provided with a first flange, and the first flange is fixedly clamped with the first bulge; the inner ends of the suction section shell, the first middle section shell and the second middle section shell are respectively provided with a second flange, and the second flanges are fixedly clamped with the second bulges;

a balance disc is arranged between the spitting section shell and the pump shaft; and a bearing box is arranged at the rear end part of the pump shaft.

Furthermore, a radial discharge port is formed in the discharge section shell.

Furthermore, an axial annular plate I and a radial annular plate II are arranged between the spitting section shell and the balance disc; and a convex ring is arranged on the outer side of the ring plate I, a concave ring is arranged at the inner end of the spitting section shell, and the convex ring is arranged in the concave ring.

Furthermore, a packing sealing device is further arranged on the pump shaft, and a gland is arranged at the end part of the packing sealing device; and a support frame is arranged on the outer side of the packing sealing device and is fixedly connected with the spitting section shell and the bearing box respectively.

To sum up, the utility model discloses following technological effect has been gained:

compared with the prior art, the utility model discloses on the basis of 3 grades of pumps, the bearing box and the seal part of pump shaft front end have been left away, inside slide bearing that sets up of section casing of inhaling replaces bearing box and seal part, the slide bearing supports the pump body with the bearing box of rear end jointly, realize that both ends support, the mode that all supports with the bearing box at both ends has reduced area compared, manufacturing cost is reduced, the sunction inlet of section casing of inhaling simultaneously is the axial, water conservancy efficiency is improved, compare preceding radial inspiratory mode, the water inlet rivers of pump are more stable, and need not add the elbow in addition and can insert the inlet line, use cost is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of portion A of FIG. 1;

in the figure, 1, a pump shaft, 2, a sliding bearing, 3, a suction section shell, 4, a first impeller, 5, a first guide vane, 6, a first middle section shell, 7, a second impeller, 8, a second guide vane, 9, a third impeller, 10, a third guide vane, 11, a discharge section shell, 111, a concave ring, 12, a packing sealing device, 13, a bearing box, 14, a suction inlet, 15, a discharge outlet, 16, a balance disc, 17, a support frame, 18, a first ring plate, 181, a convex ring, 19, a second ring plate, 20, a gland, 21, a first wear-resistant sleeve, 211, a first protrusion, 22, a second wear-resistant sleeve, 221, a second protrusion, 23, a front cover plate, 24, a blade, 25, a rear cover plate, 26, a hub, 27, a second middle section shell, 28, a first flange, 29 and a second flange.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

as shown in fig. 1, an axial suction multistage pump includes a pump shaft 1, a sliding bearing 2 is disposed at a front end of the pump shaft 1, a bearing box 13 is disposed at a rear end of the pump shaft 1, and the sliding bearing 2 replaces a bearing box component at the front end to support two ends of the pump together with the bearing box 13. In order to reduce the production cost and the use cost and reduce the occupied area, particularly in a narrow space of a pump used on a ship, a front bearing box component (the structure is the same as that of the bearing box component at the back of the pump) is removed, so that a front supporting point is required to be in contact with a conveyed medium, and the phenomena of corrosion and rust death of a rolling bearing are caused.

As shown in fig. 1, an intake casing 3 is disposed outside the sliding bearing 2, an axial intake port 14 is formed in the intake casing 3, a first middle casing 6, a second middle casing 27, and a discharge casing 11 are further disposed outside the pump shaft 1, the intake casing 3, the first middle casing 6, the second middle casing 27, and the discharge casing 11 are fixedly connected to each other, and a radial discharge port 15 is formed in the discharge casing 11. The utility model discloses set the sunction inlet 14 to the axial, the inspiratory mode of axial makes the suction liquid get into the impeller perpendicularly, does not prerevolve, and is stable than radial inspiratory mode rivers, multiplicable hydraulic efficiency.

A first impeller 4 and a first guide vane 5 are arranged between the suction section shell 3 and the first middle section shell 6; a second impeller 7 and a second guide vane 8 are arranged between the first middle section shell 6 and the second middle section shell 27; a third impeller 9 and a third guide vane 10 are arranged between the second middle section casing 27 and the discharge section casing 11.

As shown in fig. 2, each of the first impeller 4, the second impeller 7, and the third impeller 9 includes a front cover plate 23, a blade 24, a rear cover plate 25, and a hub 26, and the rear cover plate 25 is fixedly connected to the middle of the hub 26, wherein the hubs 26 of the three impellers are connected to each other, so that the accumulated error is reduced, the rotation is synchronous, and the maintenance is convenient. The front cover plate 23 is provided with a second wear-resistant sleeve 22, the hub 26 is provided with a first wear-resistant sleeve 21, and the first wear-resistant sleeve 21 and the second wear-resistant sleeve 22 are respectively provided with a first bulge 211 and a second bulge 221; the inner end parts of the first guide vane 5 and the second guide vane 8 are respectively provided with a first flange 28, and the first flange 28 is fixedly clamped with the first bulge 211; the inner ends of the suction section shell 3, the first middle section shell 6 and the second middle section shell 27 are respectively provided with a second flange 29, and the second flange 29 is clamped and fixed with a second bulge 221. The first wear-resistant sleeve 21 and the second wear-resistant sleeve 22 are arranged to ensure that the shell and the impeller are not abraded when the impeller rotates, and the service life is prolonged.

As shown in fig. 1, a balance disk 16 is arranged between the discharge section housing 11 and the pump shaft 1, the three impellers generate axial force when rotating, and the balance disk 16 is used for balancing the axial force to avoid damage to the pump shaft caused by the axial force.

An axial annular plate I18 and a radial annular plate II 19 are arranged between the discharge section shell 11 and the balance disc 16; the outer side of the first ring plate 18 is provided with a convex ring 181, the inner end of the discharge section shell 11 is provided with a concave ring 111, and the convex ring 181 is arranged in the concave ring 111. Under long-term operation, the first ring plate 18 and the second ring plate 19 can generate friction with the balance disc 16, in the embodiment, the first ring plate 18 and the second ring plate 19 are separated, the whole shell of the spitting section is not required to be replaced when the wearing parts are replaced, and only two small parts of the first ring plate 18 and the second ring plate 19 need to be replaced.

The pump shaft 1 is also provided with a packing sealing device 12, oil immersed asbestos packing is used for blind men, and the end part of the packing sealing device 12 is provided with a gland 20; and a support frame 17 is arranged on the outer side of the packing sealing device 12, and the support frame 17 is fixedly connected with the discharge section shell 11 and the bearing box 13 respectively.

Compared with the prior art, the utility model discloses on the basis of 3 grades of pumps, the bearing box and the seal part of pump shaft front end have been left away, 3 inside slide bearing 2 that set up of section casing of inhaling replace bearing box and seal part, slide bearing 2 supports the pump body with the bearing box 13 of rear end jointly, realize that both ends support, the mode that all supports with the bearing box at both ends has reduced area before comparing, manufacturing cost is reduced, the sunction inlet 14 that inhales section casing 3 simultaneously is the axial, make and inhale the perpendicular impeller that gets into of liquid, do not revolve in advance, water conservancy efficiency has been improved, compare preceding radial inspiratory mode, the water inlet rivers of pump are more stable, and need not add in addition and can insert the inlet pipeline, use cost is reduced. The first guide vane 5, the second guide vane 8 and the third guide vane 10 can effectively guide the medium at the water outlet of the previous-stage impeller into the inlet position of the next-stage impeller, and the serial connection of the multistage impellers is realized.

The utility model provides a pump is used to the operational environment that the space is narrow and small more, like the pump for boats and ships, the pump is used in the mine drainage, and the transport distance is far away, but the use operating mode that the large-scale pump can't satisfy on-the-spot installation condition again, and the pump of this kind of structure is light, swift, is the special pump under this kind of environment.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. An axial suction multistage pump comprising a pump shaft (1), characterized in that: the front end of the pump shaft (1) is provided with a sliding bearing (2); a suction section shell (3) is arranged on the outer side of the sliding bearing (2), an axial suction port (14) is formed in the suction section shell (3), and a first middle section shell (6), a second middle section shell (27) and a discharge section shell (11) are further arranged on the outer side of the pump shaft (1);

a first impeller (4) and a first guide vane (5) are arranged between the suction section shell (3) and the first middle section shell (6); a second impeller (7) and a second guide vane (8) are arranged between the first middle section shell (6) and the second middle section shell (27); a third impeller (9) and a third guide vane (10) are arranged between the second middle section shell (27) and the discharge section shell (11);

the first impeller (4), the second impeller (7) and the third impeller (9) respectively comprise a front cover plate (23), blades (24), a rear cover plate (25) and a hub (26), and the rear cover plate (25) is fixedly connected to the middle of the hub (26); a second wear-resistant sleeve (22) is arranged on the front cover plate (23), a first wear-resistant sleeve (21) is arranged on the hub (26), and a first bulge (211) and a second bulge (221) are respectively arranged on the first wear-resistant sleeve (21) and the second wear-resistant sleeve (22); the inner end parts of the first guide vane (5) and the second guide vane (8) are respectively provided with a first flange (28), and the first flange (28) is clamped and fixed with the first protrusion (211); the inner ends of the suction section shell (3), the first middle section shell (6) and the second middle section shell (27) are respectively provided with a second flange (29), and the second flange (29) is clamped and fixed with the second bulge (221);

a balance disc (16) is arranged between the spitting section shell (11) and the pump shaft (1); and a bearing box (13) is arranged at the rear end part of the pump shaft (1).

2. The axial suction multistage pump of claim 1, wherein: the discharge section shell (11) is provided with a radial discharge port (15).

3. The axial suction multistage pump of claim 1, wherein: an axial annular plate I (18) and a radial annular plate II (19) are arranged between the spitting section shell (11) and the balance disc (16); a convex ring (181) is arranged on the outer side of the first ring plate (18), a concave ring (111) is arranged at the inner end of the spitting section shell (11), and the convex ring (181) is arranged in the concave ring (111).

4. The axial suction multistage pump of claim 1, wherein: the pump shaft (1) is also provided with a packing sealing device (12), and the end part of the packing sealing device (12) is provided with a gland (20); and a support frame (17) is arranged on the outer side of the packing sealing device (12), and the support frame (17) is fixedly connected with the spitting section shell (11) and the bearing box (13) respectively.