CN213540721U

CN213540721U - Flow-adjustable multi-stage rotary jet pump

Info

Publication number: CN213540721U
Application number: CN202021866197.4U
Authority: CN
Inventors: 李明伟; 高金伟; 杨海洪; 闻跃忠
Original assignee: Jiangsu Hongmao Energy Saving Technology Co ltd
Current assignee: Jiangsu Hongmao Energy Saving Technology Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-06-25
Anticipated expiration: 2030-09-01

Abstract

The utility model relates to a flow adjustable multistage formula rotary jet pump, including the bearing box, install the transmission shaft through the bearing in the bearing box, be connected with the shell body on the right side of bearing box, the right side of shell body is connected with the apron, is connected with the business turn over water on the right side of apron, is connected with the rotor part at the right-hand member of transmission shaft, installs mechanical seal seat on the rotor part, and the cover is equipped with mechanical seal on mechanical seal seat, installs the collector tube in business turn over water. By adopting the liquid collecting pipe with adjustable flow, the specification and the number of the liquid collecting pipes are reduced, so that the cost is reduced; the impeller structure which is symmetrically arranged is adopted, so that the disc friction loss of liquid in the cavity is reduced, and the efficiency of the pump is improved.

Description

Flow-adjustable multi-stage rotary jet pump

Technical Field

The utility model relates to a flow adjustable multistage formula rotary jet pump belongs to fluid machinery technical field.

Background

The rotary jet pump is a centrifugal pump with low specific speed, and its outstanding features are smooth running and long service life. Because the rotary jet pump relates to a plurality of fields, the required flow range is wide, and the main way of adjusting the flow of the rotary jet pump is realized by replacing liquid collecting pipes with different specifications at present, so that the liquid collecting pipes with a plurality of specifications need to be designed and manufactured, the manufacturing and management cost of manufacturing enterprises is increased, and the stock quantity of spare parts of users is increased.

Disclosure of Invention

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the utility model provides a flow adjustable multistage formula rotary jet pump, single collector tube can satisfy the demand of multiple flow point to reduce the specification quantity of collector tube, reduced the cost of enterprise.

The flow-adjustable multi-stage rotary jet pump of the utility model comprises a bearing box which is horizontally arranged, a transmission shaft is arranged in the bearing box in a penetrating way, two ends of the transmission shaft are arranged in the bearing box through bearings, the right side of the bearing box is connected with an outer shell, the right side of the outer shell is connected with a cover plate, the right side of the cover plate is connected with a water inlet and outlet body for liquid inlet and outlet, the right end of the transmission shaft in the outer shell is connected with a rotor component for liquid acceleration, a mechanical seal seat is arranged on the rotor component, a mechanical seal for sealing liquid is sleeved on the mechanical seal seat, a connecting flange of the mechanical seal is fixed between the water inlet and outlet body and the cover plate, install in business turn over water and be used for liquid to collect and the collector tube of pressure boost, the one end of collector tube is installed in business turn over water, and the other end setting of collector tube is in the rotor part, its characterized in that: the rotor part comprises a first impeller and a second impeller, and a connecting sleeve which enables the first impeller and the second impeller to form a rotor chamber is arranged between the first impeller and the second impeller.

Preferably, the second impeller comprises a second rear cover plate and a second front cover plate tightly attached to the second rear cover plate, a plurality of flow channels for conveying liquid are radially formed in the right end face of the second rear cover plate, a through hole for sucking liquid is formed in the center of the second front cover plate, and the left side face of the second rear cover plate is connected to the transmission shaft in a matched manner through a tongue-and-groove.

Preferably, the first impeller comprises a first rear cover plate and a first front cover plate tightly attached to the first rear cover plate, a plurality of flow channels for conveying liquid are radially formed in the left end face of the first rear cover plate, and through holes for penetrating and installing liquid collecting pipes are formed in the centers of the first rear cover plate and the first front cover plate.

Further preferably, a radial bearing for bearing radial load is installed at the left end of the transmission shaft 2, and a thrust bearing for bearing axial load is installed at the right end of the transmission shaft 2.

Preferably, the liquid collecting pipe 7 comprises an intake section 7.1 with a flow channel inside, the flow channel of the intake section 7.1 penetrates through the right side surface of the bottom from the front side surface of the top of the intake section, a liquid discharge hole for liquid diversion is formed in the back surface of the intake section corresponding to the inlet of the intake section 7.1, a section of threaded hole is formed in the outlet of the liquid discharge hole, a liquid discharge screw 12 is installed in the threaded hole, a through hole for diversion is formed in the center of the liquid discharge screw 12, a discharge section 7.2 is arranged on the right side of the bottom of the intake section 7.1, the discharge section 7.2 is a hollow pipe with a closed left end and a right end, and the left end of the discharge section 7.2 is connected and communicated with the outlet of the.

Further preferably, the suction section 7.1 is located in the middle between the first impeller and the second impeller.

More preferably, the split drainage holes formed at the top of the suction section 7.1 are in the tangential direction of the suction port radius R1.

Further preferably, the mechanical seal is a cartridge type mechanical seal.

Compared with the prior art, the invention has the following beneficial effects: according to the flow-adjustable multistage rotary jet pump, the back surface of the suction inlet of the liquid collecting pipe is provided with the liquid discharging hole for shunting liquid, the outlet of the liquid discharging hole is provided with the liquid discharging screw through threads, the center of the liquid discharging screw is provided with the through hole for shunting liquid, and when the suction flow of the liquid collecting pipe needs to be changed, the liquid discharging screw can be replaced by the liquid discharging screw with different hole diameters, so that the specification number of the liquid collecting pipe is reduced, and the cost of manufacturing enterprises is reduced.

Drawings

Fig. 1 is a schematic diagram of a novel structure for using the pump.

Fig. 2 is a schematic structural diagram of the first impeller.

Fig. 3 is a schematic structural view of the second impeller.

FIG. 4 is a schematic view of the structure of the header.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a partial cross-sectional view of fig. 1.

FIG. 7 is an enlarged view of a portion of I.

In the figure: 1. bearing box 2, transmission shaft 3, second impeller 3.1, second back shroud 3.2, second front shroud 4, adapter sleeve 5, first impeller 5.1, first back shroud 5.2, first front shroud 6, business turn over water 7, collector tube 7.1, suction section 7.2, discharge section 8, mechanical seal 9, mechanical seal seat 10, apron 11, shell body 12, flowing back screw.

Detailed Description

The invention is further described below with reference to the accompanying drawings: the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

As shown in fig. 1, the flow-adjustable multistage jet grouting pump comprises a bearing box 1 horizontally arranged, a transmission shaft 2 penetrates through the bearing box 1, two ends of the transmission shaft 2 are installed in the bearing box 1 through bearings, a housing 11 is connected to the right side of the bearing box 1, a cover plate 10 is connected to the right side of the housing 11, a water inlet and outlet body 6 for liquid to enter and discharge is connected to the right side of the cover plate 10, a rotor member for liquid acceleration is connected to the right end of the transmission shaft 2 in the housing 11, a mechanical seal seat 9 is installed on the rotor member, a mechanical seal 8 for sealing liquid is sleeved on the mechanical seal seat 9, a connecting flange of the mechanical seal 8 is fixed between the water inlet and outlet body 6 and the cover plate 10, a liquid collecting pipe 7 for liquid collection and pressurization is installed in the water inlet and outlet body 6, one end of the liquid collecting pipe 7 is installed in the water, the other end of the header 7 is arranged in a rotor part, the rotor part comprises a first impeller 5 and a second impeller 3, and a connecting sleeve 4 which enables the first impeller 5 and the second impeller 3 to form a rotor chamber is arranged between the first impeller 5 and the second impeller 3.

The second impeller 3 comprises a second rear cover plate 3.1 and a second front cover plate 3.2 tightly attached to the second rear cover plate 3.1, a plurality of flow channels for conveying liquid are radially arranged on the right end face of the second rear cover plate 3.1, a through hole for sucking liquid is arranged in the center of the second front cover plate 3.2, and the left side face of the second rear cover plate 3.1 is connected to the transmission shaft 2 through a tongue-and-groove in a matched mode. As shown in FIG. 3, the technical design of the section is compact in structure and convenient to manufacture and install.

The first impeller 5 comprises a first rear cover plate 5.1 and a first front cover plate 5.2 tightly attached to the first rear cover plate 5.1, a plurality of flow channels for conveying liquid are radially formed in the left end face of the first rear cover plate 5.1, and through holes for penetrating and installing the liquid collecting pipes 7 are formed in the centers of the first rear cover plate 5.1 and the first front cover plate 5.2. As shown in FIG. 2, the technical design of the section is compact in structure and convenient to manufacture and install.

And a radial bearing is arranged at one end of the transmission shaft 2 close to the second impeller 3, and a thrust bearing used for bearing residual axial force is arranged at the other end of the transmission shaft 2. As shown in fig. 1, the technical design of this section improves the bearing capacity of the device and prolongs the service life of the device.

The liquid collecting pipe 7 comprises an intake section 7.1 with a flow channel inside, the flow channel of the intake section 7.1 penetrates through the right side surface of the bottom from the front side surface of the top of the intake section, a liquid discharge hole for liquid distribution is formed in the back surface of the intake section corresponding to the inlet of the intake section 7.1, a section of threaded hole is formed in the outlet of the liquid discharge hole, a liquid discharge screw 12 is installed in the threaded hole, a through hole for distribution is formed in the center of the liquid discharge screw 12, a discharge section 7.2 is arranged on the right side of the bottom of the intake section 7.1, the discharge section 7.2 is a hollow pipe with the left end closed by the right end of the through hole, and the left end of the discharge section 7.2 is communicated with. As shown in figures 4, 5 and 7, the technical design of the section facilitates the production, the manufacture and the installation of the liquid collecting pipe 7.

The suction section 7.1 of the header 7 is located intermediate the first impeller 5 and the second impeller 3. As shown in figure 1, the technical design of the section reduces the bypass loss of the liquid collecting pipe 7 to the liquid in the rotor cavity, and improves the efficiency of the pump.

The top of the suction section 7.1 is provided with a split liquid discharge hole in the tangential direction of the radius R1 of the suction inlet. As shown in fig. 5, the technical design of the present section facilitates the flow splitting of the suction inlet of the suction section 7.1.

The mechanical seal 8 is a cartridge type mechanical seal. This section technical design is favorable to dismantling and installing mechanical seal.

As shown in fig. 1 and 6, when the device works, the driving machine drives the transmission shaft 2 to rotate at a high speed, the transmission shaft 2 drives the rotor part to rotate again, liquid enters from the inlet of the water inlet and outlet body 6 and enters the first impeller 5 through the inner hole of the mechanical seal seat 9, the first impeller 5 rotates at a high speed to throw the liquid in the flow channel into the rotor part, part of low-speed liquid in the rotor part enters the second impeller 3 to flow into the rotor part again after increasing the speed, because the diameter of the outlet of the impeller is consistent with the diameter of the inlet of the liquid collecting pipe 7, the liquid flowing out of the first impeller 5 and the second impeller 3 enters from the inlet of the liquid collecting pipe 7, the area of the flow channel of the liquid collecting pipe 7 is gradually increased from the inlet to the outlet, the speed is gradually reduced, the pressure is gradually increased, so that the kinetic energy of the liquid is converted into pressure energy, the flow velocity of the inlet, the friction loss of the rotor cavity and the liquid disc is reduced, and the operation efficiency of the pump is improved.

As shown in fig. 6 and 7, when the pump flow needs to be increased, the liquid collecting pipe 7 is firstly detached from the pump cavity, then the liquid discharging screw 12 arranged on the liquid collecting pipe 7 is removed, and the liquid discharging screw 12 with a smaller or no hole is replaced, so that when liquid enters from the inlet of the pressure increasing pipe 7.1, the liquid shunted from the liquid discharging hole of the pressure increasing pipe 7.1 is reduced, the liquid sucked by the liquid collecting pipe 7 is increased, and the flow rate of the pump is increased.

As shown in fig. 6 and 7, when the flow rate needs to be reduced, the liquid collecting pipe 7 is firstly detached from the pump cavity, the liquid discharging screw 12 arranged on the liquid collecting pipe 7 is taken down, the liquid discharging screw 12 with a larger aperture is replaced or not arranged, when liquid enters from the inlet of the pressure increasing pipe 7.1, the liquid shunted from the liquid discharging hole of the pressure increasing pipe 7.1 is increased, so that the liquid sucked by the liquid collecting pipe 7 is reduced, the flow rate of the pump is further reduced, the use of multiple flow points can be realized through a single liquid collecting pipe 7, and the production cost of enterprises is reduced.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A flow-adjustable multistage rotary jet pump comprises a bearing box (1) which is horizontally arranged, a transmission shaft (2) is arranged in the bearing box (1) in a penetrating manner, two ends of the transmission shaft (2) are installed in the bearing box (1) through bearings, the right side of the bearing box (1) is connected with an outer shell (11), the right side of the outer shell (11) is connected with a cover plate (10), the right side of the cover plate (10) is connected with a water inlet and outlet body (6) for sucking and discharging liquid, the right end of the transmission shaft (2) in the outer shell (11) is connected with a rotor component for accelerating the liquid, a mechanical sealing seat (9) is installed on the rotor component, a mechanical seal (8) for sealing the liquid is sleeved on the mechanical sealing seat (9), a connecting flange of the mechanical seal (8) is fixed between the water inlet and outlet body (6) and the cover plate (10), a liquid collecting pipe (7) for collecting and pressurizing the liquid is, the one end of collector tube (7) is installed in business turn over water (6), and the other end setting of collector tube (7) is in the rotor part, its characterized in that: the rotor component comprises a first impeller (5) and a second impeller (3), and a connecting sleeve (4) which enables the first impeller (5) and the second impeller (3) to form a rotor chamber is arranged between the first impeller (5) and the second impeller (3).

2. The adjustable-flow multistage rotary jet pump as claimed in claim 1, wherein: the second impeller (3) comprises a second rear cover plate (3.1) and a second front cover plate (3.2) tightly attached to the second rear cover plate (3.1), a plurality of flow channels for conveying liquid are radially formed in the right end face of the second rear cover plate (3.1), a through hole for sucking liquid is formed in the center of the second front cover plate (3.2), and the second rear cover plate (3.1) is connected to the transmission shaft (2) through a tongue-and-groove in a matched mode.

3. The adjustable-flow multistage rotary jet pump as claimed in claim 1, wherein: the first impeller (5) comprises a first rear cover plate (5.1) and a first front cover plate (5.2) tightly attached to the first rear cover plate (5.1), a plurality of flow channels for conveying liquid are radially formed in the left end face of the first rear cover plate (5.1), and through holes for penetrating and installing the liquid collecting pipes (7) are formed in the centers of the first rear cover plate (5.1) and the first front cover plate (5.2).

4. The adjustable-flow multistage rotary jet pump as claimed in claim 1, wherein: the left end of transmission shaft (2) is installed and is used for bearing the radial bearing of radial load, and the right-hand member of transmission shaft (2) is installed and is used for bearing axial load's thrust bearing.

5. The adjustable-flow multistage rotary jet pump as claimed in claim 1, wherein: the liquid collecting pipe (7) comprises a suction section (7.1) with a flow channel inside, the flow channel of the suction section (7.1) penetrates through the right side face of the bottom from the front side face of the top of the flow channel, a liquid discharge hole for liquid distribution is formed in the back face of the suction section (7.1) corresponding to an inlet, a section of threaded hole is formed in an outlet of the liquid discharge hole, a liquid discharge screw (12) is installed in the threaded hole, a through hole for distribution is formed in the center of the liquid discharge screw (12), a discharge section (7.2) is arranged on the right side of the bottom of the suction section (7.1), the discharge section (7.2) is a hollow pipe with the left end closed by the through hole and the right end closed, and the left end of the discharge section (7.2) is communicated with an outlet of the.

6. The adjustable-flow multistage rotary jet pump of claim 5, characterized in that: the suction section (7.1) is located in the middle of the first impeller (5) and the second impeller (3).

7. The adjustable-flow multistage rotary jet pump of claim 5, characterized in that: the top of the suction section (7.1) is provided with a split liquid discharge hole in the tangential direction of the radius R1 of the suction inlet.

8. The adjustable-flow multistage rotary jet pump as claimed in claim 1, wherein: the mechanical seal (8) adopts a cartridge type mechanical seal.