CN114593065A

CN114593065A - Double-inlet horizontal split centrifugal pump

Info

Publication number: CN114593065A
Application number: CN202011300539.0A
Authority: CN
Inventors: 虞淞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2022-06-07

Abstract

The invention discloses a double-inlet horizontal split centrifugal pump, which comprises a pump body and a pump cover, wherein the pump body and the pump cover are sealed through a packing gland. The centrifugal pump is equivalent to two double suction pumps which are connected in parallel and work simultaneously, and the flow and the lift can be doubled under the same outer diameter of the impeller of the double suction pump; the inlet and the outlet are in the same direction and are vertical to the pump shaft, so that the arrangement and the installation of the pump and the water inlet and outlet pipes are facilitated; the impeller has symmetrical structure, no axial force and stable operation.

Description

Double-inlet horizontal split centrifugal pump

Technical Field

The invention relates to the field of centrifugal pumps, in particular to a double-inlet horizontal split centrifugal pump.

Background

The split pump is a large number of wide-range general mechanical equipment, is widely applied to various departments of petroleum, chemical industry, electric metallurgy, mines, ship selection, light industry, agriculture, civilian use and national defense, and plays an important role in national economy. The main characteristics of the split pump are that the flow of the conveying medium is large, and the operating principle of the split pump in the lift is as follows: the impeller is arranged in the pump shell and is fastened on the pump shaft, and the pump shaft is directly driven by the motor. The center of the pump shell is provided with a liquid suction pipe connected with the suction pipe. The liquid enters the pump through the bottom valve and the suction pipe. The liquid outlet on the pump shell is connected with a discharge pipe. When the rotating speed of the pump is fixed, the pressure head and the flow rate of the pump are related to the diameter of the impeller. However, the lift and the flow of the existing pump in the prior art still have a liftable space, and the high lift and the large flow are always hot spots pursued in the industry.

Disclosure of Invention

In order to solve at least one of the problems of the existing centrifugal pump, the invention mainly aims to improve a large-flow high-lift double-inlet horizontal split centrifugal pump.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an open centrifugal pump in two import levels, includes the pump body, the pump cover, seal through gland between the pump body and the pump cover, respectively have a water sucking mouth at the both ends of the same one side of the pump body, the delivery port just is located axial central authorities at pump body opposite side, inside first level double suction impeller and the secondary impeller of being equipped with of pump, first level double suction impeller is connected to water sucking mouth department, first level double suction impeller reconnection secondary impeller, first level impeller and secondary impeller pass through the sealing ring and fix, two first level double suction impellers set up back to back.

Furthermore, double guide vanes are arranged inside the pump cover, the guide vanes are symmetrically distributed along the vertical central axis, and guide vane sleeves are arranged on the guide vanes.

Furthermore, a cavity formed by the pump body and the pump cover is sealed by filler, and a filler ring matched with the filler water-sealing mounting hole is further arranged.

Further, still include the rotor part, the rotor part includes axle and impeller spacer sleeve for fixed first grade double suction impeller and secondary impeller still are equipped with the axle both ends and all are equipped with the pump shaft coupling, and the pump shaft coupling even has bearing unit, and epaxial manger plate circle that still is equipped with, the manger plate circle is located between impeller and the bearing unit.

The invention has the following beneficial effects: (1) the two suction inlets and the water outlet of the pump and the lower part of the pump shell which are both positioned below the middle opening surface of the pump are horizontally positioned at two sides and form a vertical direction with the axial lead, so that a motor and a pipeline are not required to be detached during maintenance, and the operation is very convenient; (2) the water suction port and the water outlet of the pump are both vertically below the axis, and under the same rotating speed and flow rate, the pump is not easy to generate cavitation due to the reduction of the inlet flow velocity, the water inlet direction is directly influenced by the form, namely the water suction port and the water outlet are formed by combining two impellers which are horizontally arranged oppositely, and meanwhile, the water flow flowing out of the impellers is converged into a volute to form a high-pressure area; (3) the double-suction pump is equivalent to two double-suction pumps which are connected in parallel and work simultaneously, and the flow and the lift can be doubled under the same outer diameter of the impeller of the double-suction pump; (4) the inlet and the outlet are in the same direction and are vertical to the pump shaft, so that the arrangement and installation of the pump and the water inlet and outlet pipes are facilitated; (5) the impeller has a symmetrical structure, can well balance the axial force generated by the pressure difference between the front side and the rear side of the rear cover plate at the suction port of a single suction impeller, has no axial force, and operates stably.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a left side view of an embodiment of the present invention;

FIG. 3 is a perspective view of an embodiment of the present invention;

figure 4 is a schematic representation of a rotor component configuration of an embodiment of the present invention.

In the attached drawing 1, 1 is a pump body, 2 is a pump cover, 3 is a packing gland, 4 is a sealing ring, 5 is a sealing ring, 6 is a guide vane, 7 is a guide vane, 8 is a guide vane sleeve, 9 is a rotor component, and 10 is a packing ring; 11 is a shaft, 12 is an impeller baffle sleeve, 13 is an impeller baffle sleeve, 14 is a primary double-suction impeller, 15 is a primary double-suction impeller, 16 is a secondary impeller, 17 is a packing shaft sleeve, 18 is a bearing part A, 19 is a bearing part B, 20 is a water retaining ring, and 21 is a pump coupling.

Detailed Description

The present invention will be further illustrated by the following specific examples.

The utility model provides a two import level centrifugal pump of open in, as shown in figure 1 and figure 2, including the pump body 1, pump cover 2, seal through gland 3 between the pump body and the pump cover, there is a water sucking mouth respectively at the both ends of the same one side of the pump body, the delivery port just is located axial central authorities at pump body opposite side, inside first level double suction impeller and the secondary impeller of being equipped with of pump, water sucking mouth department connects first level double suction impeller, first level double suction impeller reconnection secondary impeller, first level impeller and secondary impeller pass through sealing ring 4, 5 and fix, two first level double suction impellers set up back to back.

Wherein, pump cover inside is equipped with two stator 6, 7, and the stator is followed perpendicular central axis symmetric distribution, and the stator is equipped with guide vane cover 8.

Wherein, the cavity that pump body and pump cover are constituteed is the packing sealed, still is equipped with and wants the complex packing ring 10 with water encapsulation mounting hole of packing. Including the packing bearing 17.

The device further comprises a rotor component 9, as shown in fig. 4, the rotor component comprises a shaft 11 and an impeller retaining sleeve 13, the shaft 11 and the impeller retaining sleeve are used for fixing the first-stage double-suction impellers 14 and 15 and the second-stage impeller 16, pump couplers 21 are arranged at two ends of the shaft, the pump couplers are connected with bearing components 18 and 19, and a water retaining ring 20 is arranged on the shaft and located between the impellers and the bearing components.

The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. 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 may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the present invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the invention.

Claims

1. The utility model provides a two import level centrifugal pump of open in, includes the pump body, the pump cover, seal through gland between the pump body and the pump cover, its characterized in that, respectively has a water sucking mouth at the both ends of the same one side of the pump body, the delivery port just is located axial central authorities at pump body opposite side, inside first level double suction impeller and the secondary impeller of being equipped with of pump, water sucking mouth department connects first level double suction impeller, first level double suction impeller reconnection secondary impeller, first level impeller and secondary impeller are fixed through the sealing ring, two first level double suction impellers are set up back to back.

2. The double-inlet horizontal split centrifugal pump according to claim 1, wherein double guide vanes are arranged inside the pump cover, the guide vanes are symmetrically distributed along a vertical central axis, and guide vane sleeves are arranged on the guide vanes.

3. The centrifugal pump of claim 1, wherein the chamber formed by the pump body and the pump cover is sealed by packing, and a packing ring matched with the packing water-sealing installation hole is further provided.

4. The double-inlet horizontal split centrifugal pump according to any one of claims 1 to 3, further comprising a rotor part, wherein the rotor part comprises a shaft and an impeller retaining sleeve for fixing the first-stage double-suction impeller and the second-stage impeller, a pump coupling is arranged at each of two ends of the shaft, the pump coupling is connected with a bearing part, and a water retaining ring is arranged on the shaft and located between the impeller and the bearing part.