CN112879311A

CN112879311A - Variable end suction pump

Info

Publication number: CN112879311A
Application number: CN202110115612.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Ningbo Wenze Electromechanical Technology Development Co ltd
Current assignee: Ningbo Wenze Electromechanical Technology Development Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-06-01

Abstract

The invention relates to a variable end suction pump which comprises a pump body, an A port, a T port, an impeller, a pump cover and a pump shaft, wherein a first flow passage communicated with the impeller is formed in the center of the pump body, the impeller is divided into a first impeller, a second impeller and a third impeller, check valves are respectively installed in connecting passages of the first flow passage, the first impeller, the second impeller and the third impeller, the connecting passages of the first impeller, the second impeller and the third impeller are respectively communicated with a second flow passage, a third flow passage and a fourth flow passage which are formed in the pump body, the variable end suction pump further comprises a flow regulating device, and the flow regulating device is arranged on the pump body and used for controlling the flow rate of a medium. The invention controls the through-flow number of the liquid outlet by using the turntable with the gear control window, so that the end suction pump can realize the flow regulation.

Description

Variable end suction pump

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a variable end suction pump.

Background

The end suction pump is one of centrifugal pumps, generally comprises a motor, a pump body, a pump shaft, an impeller and the like, is widely applied to industries such as mine, metallurgy, electric power, chemical engineering and the like at present, and has the main working principle that a medium in an impeller flow channel is thrown to the periphery by utilizing the rotation of the impeller, a vacuum is formed at an impeller inlet, an external medium is sucked along the inlet under atmospheric pressure to supplement the space, and then the sucked medium is thrown out by the impeller and enters an outlet, so that the end suction pump can continuously suck the medium and press the medium under the action of centrifugal force generated by the high-speed rotation of the impeller to finish the conveying of the medium; when the end suction pump is required to adjust the displacement in the prior art, the displacement of the pump can be changed only by adjusting the rotating speed, so that the efficiency of the pump and the lift of the pump are influenced, and a speed adjusting mechanism is required to control the pump; however, the speed regulating mechanism such as a frequency converter is expensive and has high cost, so that an end suction pump needs to be designed to solve the above problems.

Disclosure of Invention

In view of the above, it is desirable to provide a variable end suction pump capable of adjusting a flow rate.

The invention discloses a variable end suction pump, which comprises a pump body, an A port, a T port, an impeller arranged in the pump body, a pump cover covering the pump body and a pump shaft which is arranged in the middle of the pump cover and is used for driving the impeller to rotate, wherein a first flow passage communicated with the impeller is arranged at the center of the pump body, the impeller is divided into a first impeller, a second impeller and a third impeller, one-way valves are respectively arranged in connecting passages of the first flow passage, the first impeller, the second impeller and the third impeller, the connecting passages of the first impeller, the second impeller and the third impeller are respectively communicated with a second flow passage, a third flow passage and a fourth flow passage which are arranged on the pump body, the variable end suction pump also comprises a flow regulating device, the flow regulating device is arranged on the pump body and is used for controlling the flow rate of a medium, the flow rate adjusting device includes: the adjusting seat is fixedly connected to one side, far away from the pump cover, of the pump body, a fifth flow channel communicated with the port A is formed in the center of the adjusting seat, an annular channel is formed in the adjusting seat and located around the fifth flow channel, a sixth flow channel communicated with the first impeller, a seventh flow channel communicated with the second impeller, an eighth flow channel communicated with the third impeller and a ninth flow channel communicated with the port T are respectively communicated with the annular channel, and a tenth flow channel, an eleventh flow channel and a twelfth flow channel are further communicated with the annular channel; the turntable is rotatably connected in the adjusting seat, a thirteenth flow channel is formed in the center of the turntable, a first window used for communicating the second flow channel with the tenth flow channel, a second window used for communicating the third flow channel with the eleventh flow channel and a third window used for communicating the fourth flow channel with the twelfth flow channel are formed in the periphery of the thirteenth flow channel of the turntable; the adjusting gear set up in the regulation seat and with the periphery of carousel meshes mutually, the central fixedly connected with adjusting motor of adjusting gear, adjusting motor fixed connection in the outside of regulation seat, through starting adjusting motor can drive adjusting gear rotates, and then drives the carousel rotates to adjust the flow rate of medium.

In one embodiment, a partition plate is fixedly connected to one side of the pump body close to the pump cover.

In one embodiment, a driving gear and a plurality of driven gears engaged with the driving gear are installed between the partition plate and the pump cover, the driving gear is fixedly connected with the pump shaft, a central gear shaft of each driven gear penetrates through the partition plate and is fixedly connected with the first impeller, the second impeller and the third impeller, and the driving gear can be driven to rotate by rotating the pump shaft, so that the driven gears are driven to rotate, and the impellers are driven to rotate.

In one embodiment, the first impeller, the second impeller, and the third impeller are distributed in a circumferential array.

In one embodiment, the center points of the first window, the second window and the third window are located on the same circumferential line.

The invention has the advantages that:

the invention controls the through-flow number of the liquid outlet by using the turntable with the gear control window, so that the end suction pump can realize the flow regulation; the invention has simple structure and convenient processing, and can greatly save cost compared with the prior art.

Drawings

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

FIG. 2 is a sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1 in accordance with the present invention;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1 in accordance with the present invention;

FIG. 6 is a view taken along direction E of FIG. 1 in accordance with the present invention;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 1 at a displacement of 2/3 in accordance with the present invention;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 1 at a displacement of 1/3 in accordance with the present invention;

fig. 9 is a cross-sectional view taken along line C-C of fig. 1 of the present invention at a displacement of 0.

In the figure, the adjusting seat 1, the sixth flow passage 101, the seventh flow passage 102, the eighth flow passage 103, the tenth flow passage 104, the eleventh flow passage 105, the twelfth flow passage 106, the fifth flow passage 107, the ninth flow passage 108, the annular passage 109, the rotary table 2, the first window 201, the second window 202, the third window 203, the thirteenth flow passage 204, the pump body 3, the second flow passage 301, the third flow passage 302, the fourth flow passage 303, the first flow passage 304, the first impeller 401, the second impeller 402, the third impeller 403, the driven gear 5, the driving gear 6, the pump shaft 7, the check valve 8, the adjusting gear 9, the adjusting motor 10, the partition plate 11, and the pump cover 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 6, a variable end suction pump includes a pump body 3, an opening a, an opening T, an impeller disposed in the pump body 3, a pump cover 12 covering the pump body 3, and a pump shaft 7 rotatably disposed in the middle of the pump cover 12 and used for driving the impeller to rotate, a first flow channel 304 communicated with the impeller is disposed in the center of the pump body 3, the impeller is divided into a first impeller 401, a second impeller 402, and a third impeller 403, one-way valves 8 are disposed in connection channels of the first flow channel 304, the first impeller 401, the second impeller 402, and the third impeller 403, respectively, the connection channels of the first impeller 401, the second impeller 402, and the third impeller are communicated with a second flow channel 301, a third flow channel 302, and a fourth flow channel 303 disposed on the pump body 3, and a flow rate adjusting device is further included in the variable end suction pump, the flow rate adjusting device is provided on the pump body 3, and controls a flow rate of the medium, and the flow rate adjusting device includes: the adjusting seat 1 is fixedly connected to one side of the pump body 3, which is far away from the pump cover 12, a fifth flow channel 107 communicated with the port a is formed in the center of the adjusting seat 1, an annular channel 109 is formed in the adjusting seat 1, which is located around the fifth flow channel 107, the annular channel 109 is respectively communicated with a sixth flow channel 101 communicated with the first impeller 401, a seventh flow channel 102 communicated with the second impeller 402, an eighth flow channel 103 communicated with the third impeller 403 and a ninth flow channel 108 communicated with the port T, and the annular channel 109 is further communicated with a tenth flow channel 104, an eleventh flow channel 105 and a twelfth flow channel 106; the rotating disc 2 is rotatably connected in the adjusting seat 1, a thirteenth flow channel 204 is formed in the center of the rotating disc 2, a first window 201 for communicating the second flow channel 301 with the tenth flow channel 104, a second window 202 for communicating the third flow channel 302 with the eleventh flow channel 105, and a third window 203 for communicating the fourth flow channel 303 with the twelfth flow channel 106 are formed in the periphery of the thirteenth flow channel 204 of the rotating disc 2; adjusting gear 9 set up in adjust in the seat 1 and with the periphery of carousel 2 meshes mutually, adjusting gear 9's central fixedly connected with adjusting motor 10, adjusting motor 10 fixed connection in adjust the outside of seat 1, through starting adjusting motor 10 can drive adjusting gear 9 rotates, and then drives carousel 2 rotates to adjust the flow rate of medium.

Preferably, as shown in fig. 1, a partition plate 11 is fixedly connected to one side of the pump body 3 close to the pump cover 12.

Preferably, as shown in fig. 1, 2, and 5, a driving gear 6 and a plurality of driven gears 5 engaged with the driving gear 6 are installed between the partition plate 11 and the pump cover 12, the driving gear 6 is fixedly connected to the pump shaft 7, a central gear shaft of each driven gear 5 passes through the partition plate 11 and is respectively fixedly connected to the first impeller 401, the second impeller 402, and the third impeller 403, and the driving gear 6 can be driven to rotate by rotating the pump shaft 7, so as to drive the driven gears 5 to rotate, thereby driving the impellers to rotate.

Preferably, as shown in fig. 2, the first impeller 401, the second impeller 402 and the third impeller 403 are distributed in a circumferential array.

Preferably, as shown in fig. 4, 7, 8, and 9, the center points of the first window 201, the second window 202, and the third window 203 are located on the same circumferential line.

The working principle of the invention is as follows:

before the end suction pump is started, an external motor is connected with the pump shaft 7, so that the external motor can drive the pump shaft 7 to rotate.

An external motor is started to drive the pump shaft 7 to rotate, and further drive the driving gear 6 to rotate, because the driving gear 6 is meshed with the three driven gears 5, the first impeller 401, the second impeller 402 and the third impeller 403 are driven to rotate simultaneously, at this time, a medium enters the first impeller 401, the second impeller 402 and the third impeller 403 from the port T, the ninth flow channel 108 and the annular channel 109 through the sixth flow channel 101, the seventh flow channel 102 and the eighth flow channel 103 respectively, kinetic energy is obtained through the operation of the impellers, and the medium enters the first flow channel 304, the thirteenth flow channel 204 and the fifth flow channel 107 through respective check valves 8 and is discharged from the port A (as shown in fig. 1, fig. 2, fig. 3 and fig. 4), and at this time, the flow rate of the end suction pump is maximum.

When the end suction pump is changed to 2/3 with full displacement, the adjusting motor 10 drives the adjusting gear 9 to rotate, the adjusting gear 9 is meshed with the periphery of the rotary disc 2, so that the rotary disc 2 rotates, when the rotary disc 2 rotates to the position shown in fig. 7, the adjusting motor 10 stops, at this time, the second flow channel 301 is connected with the tenth flow channel 104 through the first window 201, the medium enters the first impeller 401 through the T port, the ninth flow channel 108, the annular channel 109 and the sixth flow channel 101, and after the first impeller 401 acts, the medium returns to the T port through the second flow channel 301, the first window 201, the tenth flow channel 104, the annular channel 109 and the ninth flow channel 108, so that the first impeller 401 only rotates without doing work, the second impeller 402 and the third impeller 403 work normally, and at this time, the flow rate of the end suction pump is 2/3 of the maximum flow rate.

When the end suction pump is changed to 1/3 with full displacement, the adjusting motor 10 drives the adjusting gear 9 to rotate, the adjusting gear 9 is meshed with the periphery of the rotary disc 2, so that the rotary disc 2 rotates, when the rotary disc 2 rotates to the position shown in fig. 8, the adjusting motor 10 stops, the second flow passage 301 is connected with the tenth flow passage 104 through the first window 201, and the third flow passage 302 is connected with the eleventh flow passage 105 through the second window 202; at this time, the first impeller 401 does not work, the medium enters the second impeller 402 through the T port, the ninth flow channel 108, the annular channel 109 and the seventh flow channel 102, and returns to the T port through the third flow channel 302, the second window 202, the eleventh flow channel 105, the annular channel 109 and the ninth flow channel 108 after the second impeller 402 is acted, so that the second impeller 402 only rotates without working, only the third impeller 403 normally works at this time, and the flow rate of the end suction pump is 1/3 of the maximum flow rate.

When the displacement of the end suction pump becomes 0, the adjusting gear 9 is driven to rotate by the adjusting motor 10, the rotary disc 2 rotates along with the adjusting gear 9 and the periphery of the rotary disc 2 is meshed, when the rotary disc 2 rotates to the position shown in fig. 9, the adjusting motor 10 stops, the second flow passage 301 is connected with the tenth flow passage 104 through the first window 201, the third flow passage 302 is connected with the eleventh flow passage 105 through the second window 202, and the fourth flow passage 303 is connected with the twelfth flow passage 106 through the third window 203; at this time, the first impeller 401 and the second impeller 402 do not work, the medium enters the third impeller 403 through the T port, the ninth flow channel 108, the annular channel 109 and the eighth flow channel 103, and returns to the T port through the fourth flow channel 303, the third window 203, the twelfth flow channel 106, the annular channel 109 and the ninth flow channel 108 after the third impeller 403 works, so that the third impeller 403 only rotates without working, at this time, all the impellers do not work, and the flow rate of the end suction pump becomes 0.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A variable end suction pump comprises a pump body, an A port, a T port, an impeller arranged in the pump body, a pump cover covered on the pump body, and a pump shaft which is arranged in the middle of the pump cover and is used for driving the impeller to rotate, and is characterized in that a first flow passage communicated with the impeller is arranged at the center of the pump body, the impeller is divided into a first impeller, a second impeller and a third impeller, one-way valves are respectively arranged in connecting passages of the first flow passage and the first impeller, the second impeller and the third impeller, the connecting passages of the first impeller, the second impeller and the third impeller are respectively communicated with a second flow passage, a third flow passage and a fourth flow passage arranged on the pump body, the variable end suction pump further comprises a flow regulating device, the flow regulating device is arranged on the pump body and is used for controlling the flow rate of a medium, the flow rate adjusting device includes:

the adjusting seat is fixedly connected to one side, far away from the pump cover, of the pump body, a fifth flow channel communicated with the port A is formed in the center of the adjusting seat, an annular channel is formed in the adjusting seat and located around the fifth flow channel, a sixth flow channel communicated with the first impeller, a seventh flow channel communicated with the second impeller, an eighth flow channel communicated with the third impeller and a ninth flow channel communicated with the port T are respectively communicated with the annular channel, and a tenth flow channel, an eleventh flow channel and a twelfth flow channel are further communicated with the annular channel;

the turntable is rotatably connected in the adjusting seat, a thirteenth flow channel is formed in the center of the turntable, a first window used for communicating the second flow channel with the tenth flow channel, a second window used for communicating the third flow channel with the eleventh flow channel and a third window used for communicating the fourth flow channel with the twelfth flow channel are formed in the periphery of the thirteenth flow channel of the turntable;

the adjusting gear set up in the regulation seat and with the periphery of carousel meshes mutually, the central fixedly connected with adjusting motor of adjusting gear, adjusting motor fixed connection in the outside of regulation seat, through starting adjusting motor can drive adjusting gear rotates, and then drives the carousel rotates to adjust the flow rate of medium.

2. The variable end suction pump according to claim 1, wherein a partition plate is fixedly connected to one side of the pump body close to the pump cover.

3. The variable end suction pump according to claim 2, wherein a driving gear and a plurality of driven gears engaged with the driving gear are installed between the partition plate and the pump cover, the driving gear is fixedly connected with the pump shaft, a central gear shaft of each driven gear passes through the partition plate and is fixedly connected with the first impeller, the second impeller and the third impeller, and the driving gear can be driven to rotate by rotating the pump shaft, so that the driven gears are driven to rotate, and the impellers are driven to rotate.

4. The variable end suction pump of claim 1, wherein the first impeller, the second impeller, and the third impeller are distributed in a circumferential array.

5. The variable end suction pump of claim 1, wherein the center points of the first, second and third windows are located on the same circumferential line.