阅读说明：本技术 一种轻型立式多级离心泵 (Light vertical 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立式多级离心泵,包括纵向布置的电机和多级离心泵泵体,所述电机和多级离心泵泵体之间通过支架固连,所述多级离心泵泵体的底部设置有底座；所述多级离心泵泵体包括泵头、设置在泵头底部的耐压筒及设置在耐压筒底部的进出水段,所述耐压筒的内部具有与进出水段连通的中空腔体,该中空腔体内设置有离心导叶；所述电机的输出轴通过联轴器与设置在耐压筒内的泵轴传动连接,所述泵轴上设置有至少三组叶轮,泵轴的底部延伸至进出水段内并通过下轴承与进出水段连接,所述耐压筒靠近进出水段的一侧设置有导流器；所述多级离心泵泵体上安装有减噪组件,所述减噪组件包括安装座和消音器,消音器设置在所述安装座的安装槽内。(The invention discloses a light vertical multistage centrifugal pump, which comprises a motor and a multistage centrifugal pump body which are longitudinally arranged, wherein the motor and the multistage centrifugal pump body are fixedly connected through a bracket; the pump body of the multistage centrifugal pump comprises a pump head, a pressure-resistant cylinder arranged at the bottom of the pump head and a water inlet and outlet section arranged at the bottom of the pressure-resistant cylinder, wherein a hollow cavity communicated with the water inlet and outlet section is arranged inside the pressure-resistant cylinder, and a centrifugal guide vane is arranged in the hollow cavity; an output shaft of the motor is in transmission connection with a pump shaft arranged in a pressure-resistant cylinder through a coupler, at least three groups of impellers are arranged on the pump shaft, the bottom of the pump shaft extends into the water inlet and outlet section and is connected with the water inlet and outlet section through a lower bearing, and a fluid director is arranged on one side, close to the water inlet and outlet section, of the pressure-resistant cylinder; the multistage centrifugal pump is characterized in that a noise reduction assembly is mounted on a pump body of the multistage centrifugal pump and comprises a mounting seat and a silencer, and the silencer is arranged in a mounting groove of the mounting seat.)

1. A light vertical multistage centrifugal pump comprises a motor and a multistage centrifugal pump body which are longitudinally arranged, wherein the motor and the multistage centrifugal pump body are fixedly connected through a support, and a base is arranged at the bottom of the multistage centrifugal pump body; the method is characterized in that: the pump body of the multistage centrifugal pump comprises a pump head, a pressure-resistant cylinder arranged at the bottom of the pump head and a water inlet and outlet section arranged at the bottom of the pressure-resistant cylinder, wherein a hollow cavity communicated with the water inlet and outlet section is arranged inside the pressure-resistant cylinder, and a centrifugal guide vane is arranged in the hollow cavity; an output shaft of the motor is in transmission connection with a pump shaft arranged in a pressure-resistant cylinder through a coupler, at least three groups of impellers are arranged on the pump shaft, the bottom of the pump shaft extends into the water inlet and outlet section and is connected with the water inlet and outlet section through a lower bearing, and a fluid director is arranged on one side, close to the water inlet and outlet section, of the pressure-resistant cylinder; the multistage centrifugal pump is characterized in that a noise reduction assembly is mounted on a pump body of the multistage centrifugal pump and comprises a mounting seat and a silencer, wherein a mounting groove is formed in the upper surface of the mounting seat, and the silencer is arranged in the mounting groove of the mounting seat.

2. The light-duty vertical multistage centrifugal pump of claim 1, wherein: the centrifugal guide vane comprises a lower guide vane, a support guide vane and a water outlet guide vane which are sequentially arranged from bottom to top; and a support rod connected with the base is arranged on the side wall of the pump head.

3. The light-duty vertical multistage centrifugal pump according to claim 1 or 2, characterized in that: the shaft coupling comprises a shaft coupling body and a flange plate arranged on one side end face of the shaft coupling body, a key groove used for mounting a motor output shaft is axially formed in the inner wall of the shaft coupling body, a threaded through hole corresponding to the key groove in position and used for screwing a set screw in is formed in the side wall of the shaft coupling body, and a flange connecting end used for being fixedly connected with the flange plate of the shaft coupling body through a bolt is arranged on the pump shaft.

4. The light-duty vertical multistage centrifugal pump of claim 3, wherein: the shaft coupling comprises a shaft coupling body and is characterized in that one end of the shaft coupling body facing a flange plate is provided with an inward-sunken positioning groove, and a positioning column which is matched with the positioning groove in size and can be inserted into the positioning groove is arranged at the connecting end of the pump shaft and the shaft coupling body.

5. The light-duty vertical multistage centrifugal pump of claim 4, wherein: the bottom of base 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 base.

Technical Field

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

Background

The multistage centrifugal pump is characterized in that more than two centrifugal pumps with the same function are integrated together, and the fluid channel structure is characterized in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, and a medium pressure relief opening of the second stage is communicated with an inlet of a third stage, so that the multistage centrifugal pump is formed by a mechanism connected in series, and the multistage centrifugal pump is significant in improving set pressure. The vertical centrifugal pump consists of four parts, namely a motor, a motor bracket, a pump cover and a pump body, transfers mechanical energy of the motor to liquid under the action of a rotating impeller on the liquid, and is widely applied to industries such as electric power, metallurgy, coal, building materials and the like. With the continuous development of the industrialization process, the application of the multistage centrifugal pump is more and more common, and the multistage centrifugal pump can convey hot water, oil, corrosive and abrasive-containing media and the like. But current multistage centrifugal pump structure is comparatively single, has certain vibration at work for the inside part of equipment rocks, and then influences centrifugal pump's performance and life-span, and moreover, conventional shaft coupling one end and the drive shaft connection of motor often appear not hard up phenomenon after long-time the use, have influenced multistage centrifugal pump's use, and the dismouting is changed loaded down with trivial details.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a light vertical multistage centrifugal pump which has a simple structure, can effectively reduce the vibration sense of the multistage centrifugal pump and has a long service life, aiming at the defects in the prior art.

The invention aims to solve the technical scheme that the light vertical multistage centrifugal pump comprises a motor and a multistage centrifugal pump body which are longitudinally arranged, wherein the motor and the multistage centrifugal pump body are fixedly connected through a support, and a base is arranged at the bottom of the multistage centrifugal pump body; the pump body of the multistage centrifugal pump comprises a pump head, a pressure-resistant cylinder arranged at the bottom of the pump head and a water inlet and outlet section arranged at the bottom of the pressure-resistant cylinder, wherein a hollow cavity communicated with the water inlet and outlet section is arranged inside the pressure-resistant cylinder, and a centrifugal guide vane is arranged in the hollow cavity; an output shaft of the motor is in transmission connection with a pump shaft arranged in a pressure-resistant cylinder through a coupler, at least three groups of impellers are arranged on the pump shaft, the bottom of the pump shaft extends into the water inlet and outlet section and is connected with the water inlet and outlet section through a lower bearing, and a fluid director is arranged on one side, close to the water inlet and outlet section, of the pressure-resistant cylinder; the multistage centrifugal pump is characterized in that a noise reduction assembly is mounted on a pump body of the multistage centrifugal pump and comprises a mounting seat and a silencer, wherein a mounting groove is formed in the upper surface of the mounting seat, and the silencer is arranged in the mounting groove of the mounting seat.

Furthermore, the centrifugal guide vane comprises a lower guide vane, a support guide vane and a water outlet guide vane which are sequentially arranged from bottom to top; and a support rod connected with the base is arranged on the side wall of the pump head.

Furthermore, the shaft coupling comprises a shaft coupling body and a flange plate arranged on one side end face of the shaft coupling body, a key groove used for installing the output shaft of the motor is axially formed in the inner wall of the shaft coupling body, a threaded through hole corresponding to the key groove and used for screwing a set screw is formed in the side wall of the shaft coupling body, and a flange connecting end fixedly connected with the flange plate of the shaft coupling body through a bolt is arranged on the pump shaft.

Furthermore, one end of the coupling body facing the flange plate is provided with an inward concave positioning groove, and a positioning column which is matched with the positioning groove in size and can be inserted into the positioning groove is arranged at the connecting end of the pump shaft and the coupling body.

Furthermore, the bottom of base is provided with the shock attenuation supporting legs, and this shock attenuation supporting legs's quantity is four and be the lower surface four corners of rectangle array setting at the base.

The invention has the beneficial technical effects that: the noise reduction assembly arranged on the multistage centrifugal pump can reduce the vibration of the multistage centrifugal pump during working, so that the shaking of parts in the multistage centrifugal pump is avoided, the service life of the multistage centrifugal pump is prolonged, and the performance of the multistage centrifugal pump is improved; the shaft coupling can reduce the part quantity of centrifugal pump, reduces the whole volume of centrifugal pump, and the shock attenuation effect can further be improved to the shock attenuation supporting legs and the cooperation of noise reduction subassembly of base bottom.

Drawings

FIG. 1 is a schematic structural view of a pump body of the multistage centrifugal pump according to the present invention;

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

fig. 3 is a schematic structural view of the noise reduction assembly 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 vertical multistage centrifugal pump of the present invention comprises a longitudinally arranged motor and a multistage centrifugal pump body, wherein the motor and the multistage centrifugal pump body are fixedly connected through a bracket 1, and a base 2 is arranged at the bottom of the multistage centrifugal pump body; the pump body of the multistage centrifugal pump comprises a pump head 3, a pressure-resistant cylinder 4 arranged at the bottom of the pump head 3 and a water inlet and outlet section 5 arranged at the bottom of the pressure-resistant cylinder 4, wherein a hollow cavity communicated with the water inlet and outlet section 5 is arranged inside the pressure-resistant cylinder 4, and a centrifugal guide vane is arranged in the hollow cavity; an output shaft of the motor is in transmission connection with a pump shaft 7 arranged in the pressure-resistant cylinder 4 through a coupling 6, at least three groups of impellers 8 are arranged on the pump shaft 7, the bottom of the pump shaft 7 extends into the water inlet and outlet section 5 and is connected with the water inlet and outlet section 5 through a lower bearing 9, and a fluid director 10 is arranged on one side, close to the water inlet and outlet section 5, of the pressure-resistant cylinder 4; the multistage centrifugal pump is characterized in that a noise reduction assembly is mounted on a pump body of the multistage centrifugal pump and comprises a mounting seat 11 and a silencer 13, a mounting groove 12 is formed in the upper surface of the mounting seat 11, and the silencer 13 is arranged in the mounting groove 12 of the mounting seat 11.

Referring to fig. 1, the centrifugal guide vane includes a lower guide vane 14, a support guide vane 15 and a water outlet guide vane 16 which are sequentially arranged from bottom to top; the side wall of the pump head 3 is provided with a support rod connected with the base 2. The bottom of base 2 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 base.

Referring to fig. 2, the shaft coupling 6 includes a shaft coupling body 17 and a flange 18 disposed on one side end surface of the shaft coupling body 17, a key groove 19 for mounting an output shaft of the motor is axially disposed on an inner wall of the shaft coupling body 17, a threaded through hole 20 corresponding to the key groove 19 and used for screwing a set screw is disposed on a side wall of the shaft coupling body 17, and a flange connecting end 21 for fixedly connecting the flange 18 of the shaft coupling body 17 with a bolt is disposed on the pump shaft 7. The end of the coupling body 17 facing the flange 18 is provided with an inwardly recessed positioning groove, and a positioning column 22 which is matched with the positioning groove in size and can be inserted into the positioning groove is arranged at the connecting end of the pump shaft 7 and the coupling body 17. The coupling body 17 is connected with the pump shaft 7 through the positioning groove and the positioning column 22, and then the coupling body is fixed through the bolt, so that the reliability and the stability of connection between the coupling body 17 and the pump shaft 7 are effectively guaranteed.

The noise reduction assembly arranged on the multistage centrifugal pump can reduce the vibration of the multistage centrifugal pump during working, so that the shaking of parts in the multistage centrifugal pump is avoided, the service life of the multistage centrifugal pump is prolonged, and the performance of the multistage centrifugal pump is improved; the shaft coupling can reduce the part quantity of centrifugal pump, reduces the whole volume of centrifugal pump, and the shock attenuation effect can further be improved to the shock attenuation supporting legs and the cooperation of noise reduction subassembly of base bottom.

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.