CN217055609U

CN217055609U - Centrifugal pump

Info

Publication number: CN217055609U
Application number: CN202220714667.8U
Authority: CN
Inventors: 吴俊辰; 谢国华; 占毓兴
Original assignee: Weilong Pump Co ltd
Current assignee: Weilong Pump Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-26
Anticipated expiration: 2032-03-30

Abstract

The utility model relates to a centrifugal pump technical field especially relates to a centrifugal pump, which comprises a pump body, install impeller assembly in the pump body and drive impeller assembly and carry out moving drive module, impeller assembly is including two sets of impeller blades of back to back installation setting, install the rotational speed sensor of control impeller blade rotational speed on the drive module, when setting up through carrying out back to back installation with two sets of impeller blades, monitor the rotational speed of impeller blade through setting up rotational speed sensor in drive module department, when having solved the problem of impeller blade rotational speed monitoring, it is more convenient to set up rotational speed sensor in impeller blade department directly relatively, it is littleer to impeller blade moving influence.

Description

Centrifugal pump

Technical Field

The utility model relates to a centrifugal pump technical field especially relates to a centrifugal pump.

Background

The arrangement mode of the impeller of the original multistage pump generally adopts a series connection mode, the balance of the axial force adopts a mode of adding a thrust bearing to a balance drum, if the impeller is more in number, the generated axial force is large, the load borne by the thrust bearing is large, the thrust bearing is often heated due to the large load, and then the bearing fails.

Chinese patent with patent application No. CN201320075169.4 discloses a centrifugal pump with back-to-back impeller, which comprises a pump body and a pump shaft, wherein the pump shaft is provided with a balance drum and an impeller, and the pump shaft is divided into two groups, namely a left impeller group and a right impeller group, according to the number of stages of the impeller, and the left impeller group and the right impeller group are of back-to-back structure; when the impeller stage number is an odd number, the impeller stage number is divided into two groups equally, and the remaining first-stage impeller is arranged on one side close to the balance drum. The utility model discloses equally divide into two sets ofly according to the progression of impeller, every a set of impeller adopts the structure of establishing ties, and two sets of impellers adopt the structure of back of the body dorsad, and the axial force that every group impeller produced like this is balanced each other basically, and thrust bearing does not bear the axial force hardly.

However, the conventional centrifugal pump with the impeller facing away from the back has many problems, such as the rotation speed detection of the blades and the sealing of the pump body.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a centrifugal pump, when setting up through carrying out back to back installation with two sets of impeller blades, monitor the rotational speed of impeller blade through setting up speed sensor in drive module department, when having solved the problem of impeller blade rotational speed monitoring, it is more convenient that direct setting up speed sensor in impeller blade department than, it is littleer to impeller blade moving influence.

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

a centrifugal pump, comprising:

the pump comprises a pump body, an impeller set arranged in the pump body and a driving module for driving the impeller set to operate;

the impeller set comprises two groups of impeller blades which are arranged back to back;

and a rotating speed sensor for monitoring the rotating speed of the impeller blades is arranged on the driving module.

As an improvement, a partition plate is arranged between the two groups of impeller blades.

As an improvement, the impeller group also comprises an impeller shaft, the impeller blades are arranged on the impeller shaft, and the impeller shaft is in transmission connection with the driving module through a gear transmission group.

As an improvement, the gear transmission set comprises a driving gear driven by the driving module to operate and a transmission impeller gear arranged on the impeller shaft, and the driving gear is meshed with the transmission impeller gear.

As an improvement, the driving module comprises a box cover and a motor;

the box cover is connected with the pump body in an installing mode, the motor is installed on the box cover, and the rotating speed sensor is installed below a rotating shaft of the motor.

As an improvement, a triple sealing unit for sealing is arranged at the mounting and connecting position of the box cover and the pump body.

As an improvement, the triple sealing unit comprises a water retaining ring, a framework oil seal and a sealing seat;

the water retaining ring is positioned between the box cover and the pump body;

the framework oil seal is arranged at the matched installation position of the impeller shaft and the box cover;

the sealing seat is arranged at the matching installation position of the impeller shaft and the pump body.

The beneficial effects of the utility model reside in that:

(1) the utility model discloses a when carrying out back to back installation setting with two sets of impeller blade, monitor the rotational speed of impeller blade through setting up speed sensor in drive module department, when having solved the problem of impeller blade rotational speed monitoring, it is more convenient to set up speed sensor in impeller blade department directly, and is littleer to impeller blade moving influence.

To sum up, the utility model has the advantages of the axial force is little, and the rotational speed control is accurate, and the leakproofness is strong, is particularly useful for centrifugal pump structure technical field.

Drawings

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

fig. 2 is an enlarged schematic view of a structure in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The embodiment is as follows:

as shown in fig. 1 and 2, a centrifugal pump includes:

the device comprises a pump body 1, an impeller assembly 2 arranged in the pump body 1 and a driving module 3 for driving the impeller assembly 2 to operate;

the impeller set 2 comprises two sets of impeller blades 21 which are arranged back to back;

a rotation speed sensor 30 for monitoring the rotation speed of the impeller blades 21 is mounted on the driving module 3.

Further, a partition plate 20 is arranged between the two sets of impeller blades 21.

Furthermore, the impeller assembly 2 further comprises an impeller shaft 22, the impeller blades 21 are mounted on the impeller shaft 22, and the impeller shaft 22 is in transmission connection with the driving module 3 through the gear transmission assembly 4.

In addition, the gear transmission set 4 includes a driving gear 41 driven by the driving module 3 to operate and a transmission impeller gear 42 installed on the impeller shaft 22, and the driving gear 41 and the transmission impeller gear 42 are engaged with each other.

Preferably, the driving module 3 includes a case cover 31 and a motor 32;

the case cover 31 is mounted and connected to the pump body 1, the motor 32 is mounted on the case cover 31, and the rotation speed sensor 30 is mounted below the rotating shaft 321 of the motor 32.

Wherein, a triple sealing unit 10 for sealing is arranged at the installation connection position of the box cover 31 and the pump body 1.

Preferably, the triple sealing unit 10 comprises a water retaining ring 101, a framework oil seal 102 and a sealing seat 103;

the water retaining ring 101 is positioned between the tank cover 31 and the pump body 1;

the framework oil seal 102 is arranged at the matching installation position of the impeller shaft 22 and the box cover 31;

the seal seat 103 is installed at the matching installation position of the impeller shaft 22 and the pump body 1.

It should be noted that, the impeller blades 21 in the present application are preferably arranged back to back, and the partition plates 20 are arranged between the impeller blades 21, and the partition plates 20 are used to block the impeller blades 21, so that the axial force generated by the impeller blades 21 is eliminated back to back, and at the same time, is reinforced by the partition plates 20, so that the axial force is nearly zero.

It should be further noted that the rotation speed sensor 20 is disposed at the rotating shaft 321 of the motor 32 to monitor the rotation speed of the rotating shaft 321 of the motor 32, so as to determine the rotation speed of the impeller 21, thereby avoiding the influence of the rotation speed sensor 20 disposed at the impeller 21 on the impeller 21.

In addition, the triple sealing unit 10 is arranged to seal and reinforce the joint of the pump body 1 and the box cover 31, so that leakage at the joint is effectively avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A centrifugal pump, comprising:

the device comprises a pump body (1), an impeller assembly (2) arranged in the pump body (1) and a driving module (3) for driving the impeller assembly (2) to operate;

the impeller set (2) comprises two groups of impeller blades (21) which are arranged back to back;

and a rotating speed sensor (30) for monitoring the rotating speed of the impeller blades (21) is arranged on the driving module (3).

2. A centrifugal pump according to claim 1, characterized in that:

a partition plate (20) is arranged between the two groups of impeller blades (21).

3. A centrifugal pump according to claim 1, characterized in that:

the impeller set (2) further comprises an impeller shaft (22), the impeller blades (21) are mounted on the impeller shaft (22), and the impeller shaft (22) is in transmission connection with the driving module (3) through a gear transmission set (4).

4. A centrifugal pump according to claim 3, characterized in that:

the gear transmission set (4) comprises a driving gear (41) driven by the driving module (3) to operate and a transmission impeller gear (42) arranged on the impeller shaft (22), and the driving gear (41) and the transmission impeller gear (42) are arranged in a meshed mode.

5. A centrifugal pump according to claim 3, characterized in that:

the driving module (3) comprises a box cover (31) and a motor (32);

the pump body (1) is installed and connected with the box cover (31), the motor (32) is installed on the box cover (31), and the rotating speed sensor (30) is installed below a rotating shaft (321) of the motor (32).

6. A centrifugal pump according to claim 5, characterized in that:

and a triple sealing unit (10) for sealing is arranged at the installation and connection position of the box cover (31) and the pump body (1).

7. A centrifugal pump according to claim 6, characterized in that:

the triple sealing unit (10) comprises a water retaining ring (101), a framework oil seal (102) and a sealing seat (103);

the water retaining ring (101) is positioned between the tank cover (31) and the pump body (1);

the framework oil seal (102) is arranged at the matched installation position of the impeller shaft (22) and the box cover (31);

the sealing seat (103) is arranged at the matching installation position of the impeller shaft (22) and the pump body (1).