CN214788013U

CN214788013U - Guide vane type multistage pump

Info

Publication number: CN214788013U
Application number: CN202120667763.7U
Authority: CN
Inventors: 林峰
Original assignee: Watu Water Pump Shanghai Co ltd
Current assignee: Watu Water Pump Shanghai Co ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-11-19
Anticipated expiration: 2031-04-01

Abstract

The utility model relates to the technical field of multistage pumps, in particular to a guide vane type multistage pump, which comprises a pump shaft and a pump body, wherein the pump body comprises a water inlet section, a middle section and a water outlet section, sealing rings are arranged on the left side and the right side of the middle section, a dustproof disc is arranged on the outer side of the pump shaft, a bearing gland is arranged at the left end of the dustproof disc, a bearing and a cap are arranged on the inner side of the bearing gland, a bearing is arranged at the left end of the bearing and the cap, a bearing body is arranged on the outer side of the bearing, a mechanical gland cover is arranged on the inner side of the bearing body, the water inlet section is fixedly connected with the left end of the water inlet section, the middle section is fixedly connected with the left end of the middle section, the water outlet section is provided with a pump cover, and liquid flowing out of a first-stage impeller directly flows to a secondary impeller along with the rotation of 90 degrees of a vane which is arranged in a guide vane body in a guide curve shape, therefore, the loss of water flow energy is reduced, and the mechanical efficiency of the pump is effectively improved.

Description

Guide vane type multistage pump

Technical Field

The utility model relates to a multistage pump technical field specifically is a water conservancy diversion leaf formula multistage pump.

Background

The multistage pump is a centrifugal pump combining a water inlet section and a water outlet section with a middle section through a pull rod, the output water pressure of the centrifugal pump can be very high, and the centrifugal force is obtained by the rotation of an impeller, so that materials are pumped out along with the fact that the gas density reaches the working range of a mechanical vacuum pump, high vacuum is obtained gradually, and the requirement on a guide vane type multistage pump is increased day by day.

After the water is discharged from the first-stage impeller 6 of the conventional multi-stage pump, the water is guided to the second-stage impeller 8 through the guide vane body 9, but at the moment, the pressurized liquid directly collides with the middle-stage body 7 through the guide vane body 9 by high-pressure water, so that the kinetic energy of the water flow is greatly reduced, the mechanical efficiency of the pump is greatly reduced, and therefore, the guide vane type multi-stage pump is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water conservancy diversion leaf formula multistage pump to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a guide vane type multistage pump comprises a pump shaft and a pump body, wherein the pump body comprises a water inlet section, a middle section and a water outlet section, sealing rings are arranged on the left side and the right side of the middle section, a dustproof disc is arranged on the outer side of the pump shaft, a bearing gland is arranged at the left end of the dustproof disc, a bearing combining cap is arranged on the inner side of the bearing gland, a bearing is arranged at the left end of the bearing combining cap, a bearing body is arranged on the outer side of the bearing, a mechanical seal cover is arranged on the inner side of the bearing body, the left end of the bearing body is fixedly connected with the water inlet section, the left end of the water inlet section is fixedly connected with the middle section, the left end of the middle section is fixedly connected with the water outlet section, a pump cover is arranged at the left end of the water outlet section, a balance drum key is fixedly connected with the tail end of the pump shaft, a balance drum is arranged on the outer side of the balance drum key on the left side, a sliding bearing is arranged on the outer side of the balance drum, and a sliding bearing sleeve is arranged on the outer side of the sliding bearing, the pump body is internally provided with a guide vane body, the guide vane body is composed of vanes arranged in a diversion type curve shape, and the water inlet direction and the water outlet direction of the guide vane body are arranged at an included angle.

Preferably, the bottom end of the pump body is provided with a pull rod, and the outer side of the pull rod is spirally connected with a pull rod nut.

Preferably, the section inboard of intaking is equipped with primary impeller, the middle section inboard is equipped with secondary impeller, primary impeller and secondary impeller's outer end one side all are equipped with the sealing ring.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses in, through the guide vane body that sets up for the liquid of outflow first order impeller is the rotatory 90 degrees direct flow direction secondary impellers of blade that water conservancy diversion formula curve form set up along with in the guide vane body, consequently reduces the loss of rivers ability, effectively improves the mechanical efficiency of pump.

Drawings

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

In the figure: 1-pump shaft, 2-dustproof disc, 3-bearing body, 4-mechanical seal gland, 5-water inlet section, 6-primary impeller, 7-middle section, 8-secondary impeller, 9-guide vane body, 10-sealing ring, 11-water outlet section, 12-pump cover, 13-balance drum key, 14-balance drum, 15-sliding bearing, 16-sliding bearing sleeve, 17-sealing ring, 18-pull rod, 19-pull rod nut, 20-bearing, 21-bearing cap, and 22-bearing gland.

Detailed Description

Referring to fig. 1, the present invention provides a technical solution:

a guide vane type multistage pump comprises a pump shaft 1 and a pump body, wherein the pump body comprises a water inlet section 5, a middle section 7 and a water outlet section 11, sealing rings 10 are arranged on the left side and the right side of the middle section 7, a dustproof disc 2 is arranged on the outer side of the pump shaft 1, a bearing gland 22 is arranged at the left end of the dustproof disc 2, a bearing combining cap 21 is arranged on the inner side of the bearing gland 22, a bearing 20 is arranged at the left end of the bearing combining cap 21, a bearing body 3 is arranged on the outer side of the bearing 20, a mechanical sealing cap 4 is arranged on the inner side of the bearing body 3, the water inlet section 5 is fixedly connected with the left end of the bearing body 3, the middle section 7 is fixedly connected with the left end of the water inlet section 5, the water outlet section 11 is fixedly connected with the left end of the water outlet section 11, a balance drum key 13 is fixedly connected with the tail end of the pump shaft 1, a balance drum 14 is arranged on the outer side of the balance drum key 13, the outside of balanced drum 14 is equipped with slide bearing 15, slide bearing 15's the outside is equipped with slide bearing sleeve 16, be equipped with guide vane body 9 in the pump body, guide vane body 9 comprises the blade that is water conservancy diversion formula curve form setting, the direction of intaking of guide vane body 9 is 90 degrees contained angles with the play water direction and sets up, and this kind of setting makes the liquid of the first order impeller 6 of outflow follow the guide vane body 9 in be the rotatory 90 degrees direct flow to secondary impeller 8 of the blade that water conservancy diversion formula curve form set up, consequently reduces the water flow energy loss, effectively improves the mechanical efficiency of pump.

The bottom of the pump body is equipped with pull rod 18, the outside screwed connection of pull rod 18 has pull rod nut 19, and this kind of being provided with does benefit to the fastening installation, 5 inboards in the section of intaking are equipped with

primary impeller

6, 7 inboards in the middle section are equipped with secondary impeller 8, primary impeller 6 all is equipped with sealing ring 17 with secondary impeller 8's outer end one side, and this kind of being provided with does benefit to and strengthens sealedly.

The working process is as follows: the utility model discloses in, the pump shaft provides the stable stay by slide bearing 15 and bearing 20 when rotatory, flows through in proper order when liquid gets into the pump chamber: the primary impeller 6, the guide vane body 9, the secondary impeller 8 and the water outlet section 11 are arranged, and through the guide vane body 9, liquid flowing out of the primary impeller 6 directly flows to the secondary impeller 8 along with the rotation of 90 degrees of the blades arranged in a guide type curve shape in the guide vane body 9, so that the water flow energy loss is reduced, and the mechanical efficiency of the pump is effectively improved. The pump shaft 1 is connected with the primary impeller 6, the secondary impeller 8 and the balance drum key 13, the balance drum key 13 is clamped with the balance drum 14, the prime motor drives the pump shaft 1 to drive the primary impeller 6 and the secondary impeller 8 to rotate, and mechanical energy is changed into static pressure energy due to the action of centrifugal force. Static liquid in the pump cavity is rotated by the primary impeller 6 to do work to obtain energy, the liquid is pressurized and then conveyed into the guide vane body 7, the guide vane body 7 guides the liquid into the secondary impeller 8, and the secondary impeller 8 and the primary impeller 6 rotate synchronously to enable the liquid to obtain hydraulic energy and flow speed again, so that the purpose of conveying the liquid or increasing the pressure of the liquid is achieved.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. The utility model provides a water conservancy diversion leaf formula multistage pump, includes pump shaft (1) and the pump body, its characterized in that: the pump body comprises a water inlet section (5), a middle section (7) and a water outlet section (11), sealing rings (10) are arranged on the left side and the right side of the middle section (7), a dustproof disc (2) is arranged on the outer side of the pump shaft (1), a bearing gland (22) is arranged at the left end of the dustproof disc (2), a bearing combining cap (21) is arranged on the inner side of the bearing gland (22), a bearing (20) is arranged at the left end of the bearing combining cap (21), a bearing body (3) is arranged on the outer side of the bearing (20), a mechanical sealing cap (4) is arranged on the inner side of the bearing body (3), the water inlet section (5) is fixedly connected to the left end of the bearing body (3), the middle section (7) is fixedly connected to the left end of the water inlet section (5), the water outlet section (11) is fixedly connected to the left end of the middle section (7), a pump cover (12) is arranged at the left end of the water outlet section (11), and a balance drum key (13) is fixedly connected to the tail end of the pump shaft (1), be located the left the outside of balanced drum key (13) is equipped with balanced drum (14), the outside of balanced drum (14) is equipped with slide bearing (15), the outside of slide bearing (15) is equipped with slide bearing sleeve (16), be equipped with guide vane body (9) in the pump body, guide vane body (9) are by being the blade component that water conservancy diversion formula curve form set up, the direction of intaking of guide vane body (9) is 90 degrees contained angles with the direction of water outlet and sets up.

2. The guide vane multi-stage pump of claim 1, wherein: the bottom end of the pump body is provided with a pull rod (18), and the outer side of the pull rod (18) is spirally connected with a pull rod nut (19).

3. The guide vane multi-stage pump of claim 1, wherein: the section of intaking (5) inboard is equipped with primary impeller (6), middle section (7) inboard is equipped with secondary impeller (8), outer end one side of primary impeller (6) and secondary impeller (8) all is equipped with sealing ring (17).