CN218439789U

CN218439789U - Improved seal structure of seal-free self-control self-priming pump

Info

Publication number: CN218439789U
Application number: CN202222262869.6U
Authority: CN
Inventors: 周跃; 张锡淼
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-02-03
Anticipated expiration: 2032-08-26

Abstract

The utility model relates to a modified does not have sealed automatic control self priming pump seal structure, including the motor frame, first level back of the body impeller apron, first level back of the body impeller, the round nut, the key, the axle sleeve, the axle, its characterized in that, first level back of the body impeller apron and first level back of the body impeller mounting are at the axle end, and by the round nut, the key is fixed epaxially, and first level back of the body impeller is located first level back of the body impeller apron, installs secondary back of the body impeller apron and secondary back of the body impeller on the epaxial in proper order of first level back of the body impeller. The utility model has the advantages that set up first, secondary backing vane wheel and backing vane wheel apron, every level backing vane wheel seals the water of half pressure head. The sealed water is respectively thrown out along the primary and secondary back impellers through the back impeller cover plate water throwing holes to flow to the pump cavity, so that the water is prevented from overflowing outwards, and a sealing effect is achieved. The outer diameters of the primary back impeller and the secondary back impeller are about 80 percent of the diameter of the main impeller, so that the power consumption is low, and the energy-saving effect is achieved.

Description

Improved seal structure of seal-free self-control self-priming pump

Technical Field

The utility model relates to a modified does not have sealed automatic control self priming pump seal structure.

Background

The conventional non-sealing self-control self-priming pump in the prior art is sealed into a back impeller structure, as shown in fig. 1, a motor frame 41, a back impeller cover plate 42, a round nut 43, a key 44, a back impeller 45 and a shaft 46 are arranged in the back impeller cover plate as shown in fig. 2, an upper cover plate 51, a side ring 52, a lower cover plate 53, a screw hole 54 and a water throwing hole 55. The upper cover plate is provided with a screw hole connected with the motor frame, and the side ring is provided with eight water throwing holes. The back impeller is used to reduce the pressure in the pump cavity and is actually a small centrifugal pump impeller, and the pressure head generated by the back impeller is used to press the high-pressure liquid at the outlet of the main impeller to leak outwards. Water is thrown to the pump cavity through the water throwing holes of the back impeller cover plate. Typically, the back impeller outer diameter is 1.2 times the main impeller outer diameter. The back impeller consumes too much power. Improvements are therefore desired to reduce the back impeller consumption.

Disclosure of Invention

The utility model aims at overcoming the above-mentioned problem that does not have sealed automatic control self priming pump seal structure to exist among the prior art, providing a modified does not have sealed automatic control self priming pump seal structure, the utility model relates to a modified does not have sealed automatic control self priming pump seal structure, including the motor frame, first level back impeller apron, first level back impeller, round nut, key, axle sleeve, axle, its characterized in that, first level back impeller apron and first level back impeller are installed at the axle end, by round nut, the key is fixed epaxially, and first level back impeller is located first level back impeller apron, installs secondary back impeller apron and secondary back impeller in proper order on the epaxial secondary back impeller that installs on first level back impeller, and secondary back impeller apron and secondary back impeller are by the key-type connection axle, and secondary back impeller is located secondary back impeller apron, sets up the axle sleeve interval between first level back impeller and secondary back impeller. The first-stage back impeller cover plate consists of an upper cover plate, a side ring and a lower cover plate, wherein the periphery of the upper cover plate is provided with a plurality of screw holes, and 8 water throwing holes are arranged slightly inward of the joint of the lower cover plate and the side ring; the secondary back impeller cover plate is composed of an upper cover plate, a side ring and a lower cover plate, a screw hole connected with the motor frame is formed in the outer ring of the upper cover plate, a screw hole connected with the screw hole of the primary back impeller cover plate is formed in the outer ring of the lower cover plate, and 8 water throwing holes are formed in the position, close to the inner side slightly, of the connection of the lower cover plate and the side ring. The utility model has the advantages that set up two back impellers, divide first, secondary. Each stage of back impeller seals half of the head of water. Meanwhile, the primary and secondary back impellers are respectively provided with back impeller cover plates. The sealed water is respectively thrown out along the primary and secondary back impellers through the back impeller cover plate water throwing holes to flow to the pump cavity, so that the water is prevented from overflowing outwards, and a sealing effect is achieved. The novel structure has the advantages that the outer diameters of the primary back impeller and the secondary back impeller are about 80 percent of the diameter of the main impeller, the power consumption is low, and the energy-saving effect is achieved.

Drawings

FIG. 5363 is a cross-sectional view of a prior art structure 1,2.

Fig. 3 is a schematic cross-sectional AA view of fig. 2.

Fig. 4 is a schematic structural section view of the present invention.

Fig. 5 is a schematic sectional view of the secondary back impeller cover plate structure of the present invention.

Fig. 6 is a schematic view of BB half section of fig. 5.

Figure 7 is the utility model discloses a first level back of body impeller apron structure section schematic diagram.

Fig. 8 is a top view of fig. 7.

Detailed Description

The present invention will be described in detail with reference to the following examples and drawings,

referring to fig. 4 to 8, an improved seal-free self-control self-priming pump seal structure comprises a motor frame 1, a primary back impeller cover plate 2, a primary back impeller 3, a round nut 4, a key 5, a shaft sleeve 6 and a shaft 7, and is characterized in that the primary back impeller cover plate 2 and the primary back impeller 4 are installed at the tail end of the shaft 7, the key 5 is fixed on the shaft 7 through the round nut 4, the primary back impeller 3 is located in the primary back impeller cover plate 2, a secondary back impeller cover plate 8 and a secondary back impeller 9 are sequentially installed on the shaft 7 on the primary back impeller 3, the secondary back impeller cover plate 8 and the secondary back impeller 9 are connected with the shaft 7 through the key 5, the secondary back impeller 9 is located in the secondary back impeller cover plate 8, and a shaft sleeve 6 interval is arranged between the primary back impeller 4 and the secondary back impeller 9. The first-stage back impeller cover plate 2 consists of an upper cover plate 11, a side ring 12 and a lower cover plate 13, wherein the periphery of the upper cover plate 11 is provided with a plurality of screw holes 14, and the joint of the lower cover plate 13 and the side ring 12 is slightly arranged close to the inner side and is provided with 8 water throwing holes 15; the secondary back impeller cover plate 8 is composed of an upper cover plate 16, a side ring 17 and a lower cover plate 18, a screw hole 19 connected with a motor frame is arranged on the outer ring of the upper cover plate 16, a screw hole 20 connected with the screw hole 14 of the primary back impeller cover plate 2 is arranged on the outer ring of the

lower cover plate

18, and 8 water throwing holes 10 are arranged on the inner side of the joint of the lower cover plate 18 and the side ring 17.

When the back impeller works, the cover plates of the primary and secondary back impellers rotate along with the shaft. The water firstly passes through the primary-stage back impeller, the pressure head generated by the primary-stage back impeller is propped against one-half high pressure of the outlet of the main impeller, and the water with the residual one-half pressure head flows to the secondary-stage back impeller. The pressure head generated by the secondary back impeller withstands half of the high pressure. Thereby sealing the leakage of high-pressure water.

Two back impellers are arranged and are divided into a primary impeller and a secondary impeller. Each stage of back impeller seals half of the head of water. Meanwhile, the primary and secondary back impellers are respectively provided with back impeller cover plates. The sealed water is respectively thrown out along the primary and secondary back impellers through the back impeller cover plate water throwing holes to flow to the pump cavity, so that the water is prevented from overflowing outwards, and a sealing effect is achieved. The novel structure has the advantages that the outer diameters of the primary back impeller and the secondary back impeller are about 80 percent of the diameter of the main impeller, the power consumption is low, and the energy-saving effect is achieved. In the sealing structure, the outer diameters of the primary back impeller and the secondary back impeller are about 80 percent of the diameter of the main impeller, and the power consumption is low.

Claims

1. The utility model provides a modified does not have sealed automatic control self priming pump seal structure, including the motor frame, first level back of the body impeller apron, first level back of the body impeller, the round nut, the key, the axle sleeve, the axle, a serial communication port, first level back of the body impeller apron and first level back of the body impeller are installed at the axle end, by the round nut, the key is fixed epaxially, first level back of the body impeller is located first level back of the body impeller apron, epaxial secondary back of the body impeller apron and the secondary back of the body impeller of installing in proper order on first level back of the body impeller, secondary back of the body impeller apron and secondary back of the body impeller are by the key-type connection axle, secondary back of the body impeller is located secondary back of the body impeller apron, set up the axle sleeve interval between first level back of the body impeller and secondary back of the body impeller.

2. The improved seal structure of the sealless self-control self-priming pump according to claim 1, wherein the first-stage back impeller cover plate is composed of an upper cover plate, a side ring and a lower cover plate, a plurality of screw holes are arranged on the periphery of the upper cover plate, and 8 water-throwing holes are arranged slightly inward of the joint of the lower cover plate and the side ring; the secondary back impeller cover plate is composed of an upper cover plate, a side ring and a lower cover plate, a screw hole connected with the motor frame is formed in the outer ring of the upper cover plate, a screw hole connected with the screw hole of the primary back impeller cover plate is formed in the outer ring of the lower cover plate, and 8 water throwing holes are formed in the position, close to the inner side slightly, of the connection of the lower cover plate and the side ring.