阅读说明：本技术 一种轻型卧式多级离心泵 (Light horizontal multistage centrifugal pump ) 是由 唐旭亮 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种轻型卧式多级离心泵,包括电机及与该电机连接的泵体,电机的输出轴与泵体的转轴传动连接,所述泵体的底部设置有底座,泵体上设置多级离心泵入口及多级离心泵出口,且泵体内部具有连接多级离心泵入口和多级离心泵出口的泵体腔,该泵体腔内设置有离心导叶,所述转轴上套设有至少三级叶轮,且每级叶轮均通过键连接在所述转轴上,所述转轴对应于叶轮安装位置的两侧外壁上设置有外螺纹,该外螺纹上旋接有固定环且所述叶轮的两侧与固定环紧密接触,所述固定环上均匀设置有若干固定螺栓,所述叶轮上设置有用于卡接该固定螺栓的环形槽,固定螺栓与环形槽的内壁紧密接触；所述底座包括减震板簧及设置在减震板簧底部的安装板体。(The invention discloses a light horizontal multistage centrifugal pump, which comprises a motor and a pump body connected with the motor, wherein an output shaft of the motor is in transmission connection with a rotating shaft of the pump body, the bottom of the pump body is provided with a base, the pump body is provided with a multi-stage centrifugal pump inlet and a multi-stage centrifugal pump outlet, a pump body cavity for connecting the multi-stage centrifugal pump inlet and the multi-stage centrifugal pump outlet is arranged in the pump body, the pump body cavity is internally provided with a centrifugal guide vane, the rotating shaft is sleeved with at least three stages of impellers, each stage of impeller is connected to the rotating shaft through a key, the outer walls of the two sides of the rotating shaft corresponding to the installation position of the impeller are provided with external threads, a fixing ring is screwed on the external thread, two sides of the impeller are tightly contacted with the fixing ring, a plurality of fixing bolts are uniformly arranged on the fixing ring, the impeller is provided with an annular groove for clamping the fixing bolt, and the fixing bolt is tightly contacted with the inner wall of the annular groove; the base comprises a damping plate spring and a mounting plate body arranged at the bottom of the damping plate spring.)

1. The utility model provides a light-duty horizontal multistage centrifugal pump, includes the motor and the pump body of being connected with this motor, and the output shaft of motor is connected with the pivot transmission of the pump body, the bottom of the pump body is provided with the base, sets up multistage centrifugal pump entry and multistage centrifugal pump export on the pump body, and pump body inside has the pump body chamber of connecting multistage centrifugal pump entry and multistage centrifugal pump export, is provided with centrifugal stator, its characterized in that in this pump body chamber: the impeller is characterized in that at least three stages of impellers are sleeved on the rotating shaft, each stage of impeller is connected to the rotating shaft through a key, external threads are arranged on the outer walls of two sides of the rotating shaft corresponding to the installation position of the impeller, fixing rings are screwed on the external threads, two sides of the impeller are in tight contact with the fixing rings, a plurality of fixing bolts are uniformly arranged on the fixing rings, annular grooves used for clamping the fixing bolts are formed in the impeller, and the fixing bolts are in tight contact with the inner walls of the annular grooves; the base comprises a damping plate spring and a mounting plate body arranged at the bottom of the damping plate spring.

2. The light-duty horizontal multistage centrifugal pump according to claim 1, characterized in that: the adjusting sleeve is arranged on the rotating shaft and is in contact with the final-stage impeller, the balancing disc and the shaft pressing sleeve are sequentially arranged on the rotating shaft on one side, away from the final-stage impeller, of the adjusting sleeve, and the side portion of the shaft pressing sleeve is fixed through the locking nut.

3. The light-duty horizontal multistage centrifugal pump according to claim 2, characterized in that: a connecting pipe connected with the inlet of the multistage centrifugal pump is arranged in the pump body cavity, the pipe diameter of the connecting pipe is larger than that of the inlet of the multistage centrifugal pump, and the connecting pipe is communicated with the inner cavity of the centrifugal guide vane through a pressing plate; the motor is connected with the pump body through an end cover extending to one side of the pump body, the end cover is of an open structure with an opening gradually enlarged from one side of the motor to one side of the pump body, and the end cover is connected with the pump body through a quick connector so as to be convenient to mount or dismount.

4. The light-duty horizontal multistage centrifugal pump according to claim 2 or 3, characterized in that: the bottom of the mounting plate body is provided with four shock absorption supporting legs, and the four shock absorption supporting legs are arranged at four corners of the lower surface of the mounting plate body in a rectangular array mode.

5. The light-duty horizontal multistage centrifugal pump according to claim 4, characterized in that: the multistage centrifugal pump is characterized in that a filtering pipeline is connected to an inlet of the multistage centrifugal pump through a flange plate, the filtering pipeline comprises a main pipeline connected with a water inlet pipeline and an impurity deposition pipeline vertically arranged at the bottom of the main pipeline, and an activated carbon filtering pipe is arranged on one side, close to the water inlet pipeline, of the main pipeline.

Technical Field

The invention relates to the technical field of multistage centrifugal pumps, in particular to a light horizontal multistage centrifugal pump.

Background

The centrifugal pump is operated by utilizing the rotation of an impeller to enable water to generate centrifugal motion, before the water pump is started, a pump shell and a water suction pipe are required to be filled with water, then a motor is started, a pump shaft drives the impeller and the water to perform high-speed rotation motion, the water generates centrifugal motion and is thrown to the outer edge of the impeller and flows into a water pressing pipeline of the water pump through a flow channel of a volute pump shell, the multistage centrifugal pump is suitable for conveying thin and clean non-flammable liquid without solid particles or fibers, and the multistage centrifugal pump can meet basic use requirements when in use in civil, industrial, agricultural and water treatment devices, but still has some defects in actual use. At first multistage centrifugal pump is at the during operation, and is not stable inadequately to the rotation control of the inside axostylus axostyle of pump body, and stability is not good, and the performance is not good for the holistic performance of the pump body reduces, consequently needs the stable effect of upgrading pump body rotational speed, and secondly multistage centrifugal pump has certain vibration at work, makes the inside part of equipment rock, and then influences centrifugal pump's performance and life-span. In addition, the existing multistage centrifugal pump is relatively complex to disassemble, and is not beneficial to the maintenance and repair of the multistage centrifugal pump.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a light horizontal multistage centrifugal pump which has a simple structure, can eliminate the bending deflection of a pump shaft caused by the installation of a multistage impeller and achieves the aim of reducing the vibration of the centrifugal pump, aiming at the defects in the prior art.

The invention aims to solve the technical scheme that the light horizontal type multistage centrifugal pump comprises a motor and a pump body connected with the motor, wherein an output shaft of the motor is in transmission connection with a rotating shaft of the pump body, the bottom of the pump body is provided with a base, a multistage centrifugal pump inlet and a multistage centrifugal pump outlet are arranged on the pump body, a pump body cavity for connecting the multistage centrifugal pump inlet and the multistage centrifugal pump outlet is arranged in the pump body, a centrifugal guide vane is arranged in the pump body cavity, at least three stages of impellers are sleeved on the rotating shaft, each stage of impeller is connected to the rotating shaft through a key, external threads are arranged on the outer walls of two sides of the rotating shaft corresponding to the installation position of the impeller, fixing rings are screwed on the external threads, two sides of the impeller are in tight contact with the fixing rings, a plurality of fixing bolts are uniformly arranged on the fixing rings, and annular grooves for clamping the fixing bolts are arranged on the impeller, the fixing bolt is tightly contacted with the inner wall of the annular groove; the base comprises a damping plate spring and a mounting plate body arranged at the bottom of the damping plate spring.

Furthermore, an adjusting sleeve in contact with the final-stage impeller is arranged on the rotating shaft, a balance disc and a shaft pressing sleeve are sequentially arranged on the rotating shaft on one side of the adjusting sleeve, which is far away from the final-stage impeller, and the side part of the shaft pressing sleeve is fixed through a locking nut.

Furthermore, a connecting pipe connected with the inlet of the multistage centrifugal pump is arranged in the pump body cavity, the pipe diameter of the connecting pipe is larger than that of the inlet of the multistage centrifugal pump, and the connecting pipe is communicated with the inner cavity of the centrifugal guide vane through a pressing plate; the motor is connected with the pump body through an end cover extending to one side of the pump body, the end cover is of an open structure with an opening gradually enlarged from one side of the motor to one side of the pump body, and the end cover is connected with the pump body through a quick connector so as to be convenient to mount or dismount.

Furthermore, the bottom of the mounting plate body is provided with four shock absorption supporting legs, and the four shock absorption supporting legs are arranged at four corners of the lower surface of the mounting plate body in a rectangular array mode.

Furthermore, be connected with the filtering conduit through the ring flange on the multistage centrifugal pump entry, this filtering conduit includes the trunk line of being connected with the inlet channel and sets up the impurity deposit pipeline in the trunk line bottom perpendicularly, and one side that the trunk line is close to the inlet channel is provided with the active carbon filter tube.

The invention has the beneficial technical effects that: the multi-stage centrifugal pump is simple in structure, the motor is connected with the pump shell through the end cover and the quick connector, so that subsequent maintenance and repair are facilitated, the maintenance cost is reduced, impellers of all stages are not in direct contact, the vibration of the multi-stage centrifugal pump is effectively reduced, the running safety of the multi-stage centrifugal pump is improved, the vibration generated during the working of the multi-stage centrifugal pump can be effectively reduced through the damping plate spring and the damping supporting legs at the bottom of the multi-stage centrifugal pump, the structure is reasonable, the strength is improved, and the practicability is high.

Drawings

FIG. 1 is a schematic view of the construction of a lightweight horizontal multistage centrifugal pump according to the present invention;

FIG. 2 is a schematic view of a connection structure of the rotating shaft and the impeller according to the present invention;

fig. 3 is a schematic structural view of a filter pipe according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inside", "outside", "lateral", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-3, the light horizontal multistage centrifugal pump of the present invention comprises a motor and a pump body 1 connected with the motor, wherein an output shaft of the motor is in transmission connection with a rotating shaft 2 of the pump body 1, a base 3 is arranged at the bottom of the pump body 1, a multistage centrifugal pump inlet and a multistage centrifugal pump outlet are arranged on the pump body 1, a pump body cavity for connecting the multistage centrifugal pump inlet and the multistage centrifugal pump outlet is arranged inside the pump body 1, a centrifugal guide vane 4 is arranged inside the pump body cavity, at least three stages of impellers 5 are sleeved on the rotating shaft 2, each stage of impellers 5 are connected to the rotating shaft 2 through keys, external threads are arranged on outer walls of two sides of the rotating shaft 2 corresponding to the installation position of the impellers 5, a fixing ring 6 is screwed on the external threads, two sides of the impellers 5 are in close contact with the fixing ring 6, and a plurality of fixing bolts 7 are uniformly arranged on the fixing ring 6, the impeller 5 is provided with an annular groove for clamping the fixing bolt 7, and the fixing bolt 7 is tightly contacted with the inner wall of the annular groove; the base 3 includes damping plate spring 8 and sets up the mounting plate body 9 in damping plate spring 8 bottom, and the bottom of mounting plate body 9 is provided with the shock attenuation supporting legs, and the quantity of this shock attenuation supporting legs is four and is the lower surface four corners of rectangle array setting at the mounting plate body.

Referring to fig. 1-2, an adjusting sleeve 10 contacting with the final-stage impeller is arranged on the rotating shaft 2, a balance disc 11 and a shaft pressing sleeve 12 are sequentially arranged on the rotating shaft 2 on one side of the adjusting sleeve 10 departing from the final-stage impeller, and the side part of the shaft pressing sleeve 12 is fixed by a locking nut 13. A connecting pipe 14 connected with the inlet of the multistage centrifugal pump is arranged in the pump body cavity, and the pipe diameter of the connecting pipe 14 is larger than that of the inlet of the multistage centrifugal pump and is communicated with the inner cavity of the centrifugal guide vane 4 through a pressing plate 15; the motor is connected with the pump body 1 through an end cover 16 extending towards one side of the pump body, the end cover 16 is of an open structure with an opening gradually enlarged from one side of the motor to one side of the pump body 1, and the end cover 16 is connected with the pump body 1 through a quick connector 17 so as to be convenient to mount or dismount. A fluid director 18 is arranged on the position of the pump body 1 close to the pressure plate 15, and a plug 19 is arranged on the upper wall surface of the pump body 1.

Referring to fig. 3, the inlet of the multistage centrifugal pump is connected with a filtering pipeline 20 through a flange, the filtering pipeline comprises a main pipeline 21 connected with the water inlet pipeline and an impurity deposition pipeline 22 vertically arranged at the bottom of the main pipeline 21, and one side of the main pipeline 21 close to the water inlet pipeline is provided with an activated carbon filtering pipe 23.

The multi-stage centrifugal pump is simple in structure, the motor is connected with the pump shell through the end cover and the quick connector, so that subsequent maintenance and repair are facilitated, the maintenance cost is reduced, impellers of all stages are not in direct contact, the vibration of the multi-stage centrifugal pump is effectively reduced, the running safety of the multi-stage centrifugal pump is improved, the vibration generated during the working of the multi-stage centrifugal pump can be effectively reduced through the damping plate spring and the damping supporting legs at the bottom of the multi-stage centrifugal pump, the structure is reasonable, the strength is improved, and the practicability is high.

The specific embodiments described herein are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.