CN217354782U - Jet pump - Google Patents

Abstract

The utility model provides an injection pump belongs to fluid power pump technical field. The problems of low working efficiency and high noise of the existing jet pump of the jet pump are solved. This jet pump is including the pump case that is used for connecting the motor, impeller and sprayer, water inlet and delivery port have been seted up on the pump case, runner two has in the impeller, the sprayer is vertical to be installed in the pump case, the installation cavity has been seted up on the pump case, the impeller inlays to be established in the installation cavity and is connected with the motor output, and the sprayer communicates with two imports of runner in the water inlet impeller respectively, set up the mouth of crossing with the delivery port intercommunication on the installation cavity inside wall, and set up along circumference on the installation cavity inside wall respectively with crossing the mouth of a river, the runner one of two imports of runner in the impeller intercommunication. The jet pump can improve the working efficiency of the jet pump and reduce the noise generated during the jet operation.

Description

Jet pump

Technical Field

The utility model belongs to the technical field of fluid power pump, a jet pump is related to.

Background

An injection pump, also known as a jet pump, is a pump that transports fluid using the injection action of high-pressure working fluid; the liquid pump generally comprises a motor, a pump shell with a cavity, an impeller arranged in the pump shell, an ejector and other parts, wherein when the liquid pump is operated, working fluid is ejected out from a nozzle at a high speed, and low pressure is formed in a vacuum chamber in the pump shell, so that the conveyed liquid is sucked into the vacuum chamber in the pump shell and then enters a mixing chamber in the pump shell; the high-energy working fluid and the low-energy transported liquid are fully mixed in the mixing chamber, so that the energy is exchanged, the speed is gradually consistent, the fluid enters the diffusion chamber in the pump shell from the throat pipe, the speed is slowed down, the static pressure is raised, and the purpose of transporting the liquid is achieved.

Chinese patent (No. CN207701387U) discloses a high-efficiency jet pump, which comprises a motor, a pump body and an intermediate connecting piece, wherein the motor is provided with a motor shaft which transversely penetrates through the intermediate connecting piece and extends to the inside of the pump body, a water inlet is formed in the side wall of the pump body, the end part of the motor shaft is provided with an impeller, a guide vane is fixedly arranged on the impeller, an ejector is fixedly arranged in the middle of the guide vane, an ejector is arranged between the ejector and an end wall, the front end of the ejector is provided with an installation block, the impeller comprises a front end plate and a rear end plate, a liquid flow channel is formed between the front end plate and the rear end plate, a transmission blade is arranged in the liquid flow channel, the center of the front end plate is provided with a guide lip, the upper end face of the front end plate is provided with a plurality of splitter blades, a rectifying blade is arranged between the adjacent splitter blades, and the top end of the pump body is provided with a water outlet.

This reference document has the following drawbacks: firstly, the motor is connected with the pump body through a fastener, so that the ejector arranged in the pump body is arranged along the horizontal direction, and in the using process of the jet pump, the trend that the conveyed fluid can not move downwards due to the action of gravity is avoided, so that the kinetic energy carried by the fluid in the conveying process needs to overcome the gravity factor, and the fluid conveying efficiency is reduced; secondly, after fluid is injected into the impeller through the injector, the fluid is thrown out of the liquid channel by the impeller rotating at high speed, enters the inner cavity of the pump body after being guided by the guide vane and flows out of the water outlet, and the fluid and the guide vane have strong interference in the process (the guide vane is generally made of plastic materials), so that noise is generated in the working process of the injection pump.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided an injection pump, the utility model aims to solve the technical problem that: to improve the working efficiency of an injection pump and reduce the noise generated during the injection operation.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an injection pump, includes pump case, impeller and the sprayer that is used for connecting the motor, seted up water inlet and delivery port on the pump case, the second runner has in the impeller, its characterized in that, the sprayer is vertical to be installed in the pump case, the installation cavity has been seted up on the pump case, the impeller inlays to be established the installation cavity is interior and is connected with the motor output, just the sprayer respectively with the water inlet the second import intercommunication of runner in the impeller, set up on the installation cavity inside wall with the mouth of crossing of water that the delivery port communicates, just set up along circumference on the installation cavity inside wall respectively with cross the mouth of a river the runner one that the second import of runner communicates in the impeller communicates.

The jet pump comprises a pump shell connected with a motor through a fastener, wherein an ejector and an impeller are installed in the pump shell, a water inlet and a water outlet are formed in the pump shell, an installation cavity is formed in the pump shell, the impeller is specifically embedded in the installation cavity and connected with an output end of the motor, the ejector is vertically arranged and is respectively communicated with the water outlet and an inlet of a first flow channel in the impeller, when the jet pump works, fluid entering the pump shell from the water inlet can be guided by the ejector, so that the fluid vertically flows downwards, the fluid is pushed by the ejector in the process, and the flow rate of the fluid can be ensured to be faster under the action of gravitational potential energy carried by the fluid when the fluid is supported by the fluid under the action of the gravitational potential energy, the situation that the fluid flows under the condition that the ejector is horizontally placed is avoided, and the working efficiency of the jet pump is improved; meanwhile, a water passing port communicated with the water outlet and a first flow channel communicated with the first flow channel outlet and the water passing port in the impeller are formed in the mounting cavity along the circumferential direction, a layer of guide vanes made of plastic materials are not required to be sleeved outside the impeller, after the fluid flows into a second flow channel in the impeller (the motor drives the impeller to rotate all the time), the fluid entering the second flow channel in the impeller is thrown out into the first flow channel due to the centrifugal force generated by the rotation of the impeller and flows out to the water outlet through the first flow channel via the water passing port, the interference between the fluid and parts (the guide vanes and the like) in a pump shell is reduced in the process, the noise of the fluid which generates harsh noise in the flowing process is avoided, meanwhile, the parts required by mounting are reduced, the generation of matching errors is avoided, and the jet pump is enabled to be more quiet in work.

In the injection pump, the cross section of the installation cavity is circular, and the first flow channel is spirally formed along the circumferential inner wall of the installation cavity.

The cross-section of installation cavity is circular, with the shape looks adaptation of impeller, and runner one sets up along installation cavity circumference inner wall and is the heliciform, its inner wall levels and is the curve form, thereby make when the fluid is thrown away to runner one by the impeller and with a runner internal collision in, the impact force of fluid can be effectively unloaded to spiral helicine runner one and the fluid is led to, thereby when reducing fluid and a runner inner wall collision noise generation, ensure that the fluid can pass the mouth of a river along runner one fast, avoid the excessive loss of the energy that carries in the fluid.

In the injection pump, the width of the first flow channel gradually increases from the end far away from the water passing port to the end communicated with the water passing port.

The width of the first flow channel is gradually increased from one end far away from the water passing port to one end communicated with the water passing port, so that the flow speed of the fluid can be limited when the fluid flows in the first flow channel, and the phenomenon of turbulent flow caused after the fluid is ejected from the water passing port at a high speed is avoided.

In the injection pump, a water inlet cavity and a water outlet cavity for stabilizing pressure are arranged in the pump shell, the water inlet is communicated with the water inlet cavity, the upper end and the lower end of the water inlet cavity are arranged in a penetrating manner, the injector is clamped in the water inlet cavity and is communicated with the water inlet cavity, the water outlet is positioned at the top of the pump shell and is communicated with the water outlet cavity, and the water passing port is communicated with the water outlet through the water outlet cavity.

The ejector is inserted into an opening on the outer wall in the water inlet cavity, so that fluid can enter the ejector from the opening after entering the water inlet cavity; the water outlet cavity can be used for buffering, the internal volume of the water outlet cavity is larger than that of the water inlet cavity, so that fluid flowing out of the water passing port enters the water outlet cavity firstly, pressure carried by the fluid is continuously consumed and unloaded in the buffering cavity in the process, and the fluid is stabilized; meanwhile, the top of the ejector is also provided with an opening, so that under the state that the fluid in the water outlet cavity is about to overflow, one part of the fluid flows out from the water outlet, and the other part of the fluid flows back into the ejector again, thereby ensuring the water pressure in the pump shell to be stable and avoiding the reduction of the working efficiency of the ejector pump caused by the turbulent flow in the pump shell.

In the injection pump, the bottom in the pump shell is provided with a water passing channel, one end of the water passing channel is communicated with the installation cavity, and the other end of the water passing channel is clamped with the lower end of the injector.

The bottom of the pump shell is provided with a water passing channel, one end of the water passing channel is communicated with the mounting cavity, the other end of the water passing channel is clamped and fixed with the lower end of the ejector, and as an optimal scheme, a sealing ring is arranged between the lower end of the ejector and the water passing channel, so that the water fluid entering the ejector can only enter the mounting cavity through the water passing channel, and the fluid is prevented from seeping into the water outlet cavity from the lower end of the ejector to cause fluid turbulence.

In the above injection pump, the impeller includes a first disk body and a second disk body which are disc-shaped and are arranged at intervals, a plurality of water guide strips which are curved and arc-shaped are arranged between the first disk body and the second disk body at intervals along the circumferential direction, a second flow channel communicated with the first flow channel is formed between every two adjacent water guide strips, and a water inlet communicated with the second flow channel is formed in the center of the first surface of the first disk body.

The impeller comprises a disc-shaped disc body I and a disc body II, a plurality of water guide strips are arranged between the disc body I and the disc body II at intervals along the circumferential direction, a flow channel II for fluid to flow can be formed between every two water guide strips, a water inlet communicated with the water passing channel is formed in the center of the surface of the disc body I, during operation, fluid can enter the space between the disc body I and the disc body II through the water inlet after entering the water passing channel, and when the impeller rotates, the fluid can be thrown into the flow channel I through the flow channel II due to centrifugal force generated by rotation of the impeller; in addition, each water guide strip is bent to form an arc shape, so that a second flow channel formed by surrounding two adjacent water guide strips is bent, the path of the thrown fluid is inclined, the fluid is prevented from violently impacting on the inner wall of the first flow channel after being thrown, the noise of a working chamber of the jet pump is lower, the flow velocity of the fluid can be prevented from being reduced, and the working efficiency of the jet pump is ensured.

Compared with the prior art, the injection pump has the following advantages:

the ejector is vertically arranged, the flow velocity of fluid flowing through the ejector is guaranteed, meanwhile, a spiral flow channel I and a water passing hole are directly formed in the mounting cavity of the pump shell, the fluid is prevented from being strongly interfered by parts in the pump shell after passing through the impeller, and the noise during working is reduced while the working efficiency of the ejector is guaranteed.

And secondly, the width of the flow channel is gradually enlarged from one end far away from the water passing port to one end communicated with the water passing port, and the fluid pressure is further unloaded and stabilized through the water outlet cavity, so that the flow of the fluid is ensured to be more stable.

And thirdly, a curved flow channel II formed by encircling two adjacent water guide strips in the impeller prevents the fluid from violently impacting the inner wall of the flow channel I after being thrown out, so that the flow rate of the fluid is ensured, and the noise generated when the jet pump works is reduced.

Drawings

Fig. 1 is a schematic view of the structure of the present ejector pump.

Fig. 2 is a first sectional view of a pump casing in the present jet pump.

Fig. 3 is a second sectional view of the pump housing in the jet pump.

Fig. 4 is a schematic structural view of the impeller.

Fig. 5 is a sectional view of the impeller.

In the drawings, 1, a pump casing; 11. a water inlet; 12. a water outlet; 13. a mounting cavity; 131. water passing holes; 132. a first flow channel; 14. a water inlet cavity; 15. a water outlet cavity; 16. a water passage; 2. An impeller; 21. a first tray body; 211. a water inlet; 22. a second tray body; 3. an ejector; 4. A water guide strip; 41. and a second flow passage.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, the ejector 3 includes a pump casing 1 and a motor, the pump casing 1 is fixed to the motor by a fastening piece (screw) in a screw connection manner, an installation cavity 13 with a circular section is formed in an outer wall of one side of the pump casing 1, and an impeller 2 is embedded in the installation cavity 13 and connected with an output end of the motor, so that the output end of the motor can drive the impeller 2 to rotate; combine fig. 2 and fig. 3, water inlet 11 has been seted up on the outer wall of 1 one side of pump case, delivery port 12 has been seted up to top department, and intake antrum 14 and play water cavity 15 that have in the pump case 1, water inlet 11 and intake antrum 14 intercommunication, delivery port 12 and play water cavity 15 intercommunication, both ends run through the setting about the intake antrum 14, 3 vertical settings of sprayer, it pegs graft and sets up the influent stream mouth with intake antrum 14 intercommunication in intake antrum 14 and on the outer wall, in addition, the upper end of sprayer stretches into out the water cavity, and set up the backward flow mouth on the sprayer upper end circumference lateral wall, 1 bottom of pump case has both ends to run through the water channel 16 that sets up, its one end and installation cavity 13 intercommunication, the other end is fixed with the lower extreme joint of sprayer 3, and seal the clearance through the sealing washer between the two.

As shown in fig. 3, a water passing opening 131 is formed in the inner side wall of the mounting cavity 13, a spiral first flow passage 132 is formed in the circumferential inner wall of the mounting cavity 13, the first flow passage 132 is communicated with the water outlet cavity 15 through the water passing opening 131, and the width of the first flow passage 132 is gradually increased from one end away from the water passing opening 131 to one end communicated with the water passing opening 131, with reference to fig. 4 and 5, the impeller 2 includes a first disk body 21 and a second disk body 22, a plurality of curved water guide strips 4 are arranged between the first disk body 21 and the second disk body 22 at intervals, a curved second flow passage 41 is formed between every two adjacent water guide strips 4 in a surrounding manner, and a water inlet 211 communicated with the water passing channel 16 is formed in the center of the plate surface of the first disk body 21.

The use principle is as follows: after the spray pump is started by a worker, the fluid enters the water inlet cavity 14 from the water inlet 11 and then enters the ejector 3 through the water inlet, the fluid is ejected through the ejector 3, so that the fluid passes through the water passage 16 and the water inlet 211 and then enters the second flow passage 41, as the motor drives the impeller 2 to rotate, the fluid in the second flow passage 41 is thrown out of the second flow passage 41 under the condition of inclining a certain angle, the fluid enters the first flow passage 132 without impacting the inner wall of the first flow passage 132 violently, and under the action of the energy carried by the fluid I and the rotation of the impeller 2, the fluid in the first flow passage 132 enters the water outlet cavity 15 through the water passing opening 131, part of the fluid flows out to the outside through the water outlet 12 after the fluid passes through the first flow passage 132 and the unloading pressure stabilization of the water outlet cavity 15, and the other part of the fluid flows back to the injector 3 again through the return opening at the upper end of the injector 3.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the pump housing 1, the water inlet 11, the water outlet 12, the mounting cavity 13, the water passing opening 131, the first flow passage 132, the water inlet cavity 14, the water outlet cavity 15, the water passing channel 16, the impeller 2, the first disc body 21, the water inlet 211, the second disc body 22, the injector 3, the water guide strip 4, the second flow passage 41, and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (6)

1. The utility model provides an injection pump, includes pump case (1), impeller (2) and sprayer (3) that are used for connecting the motor, water inlet (11) and delivery port (12) have been seted up on pump case (1), runner two (41) have in impeller (2), its characterized in that, sprayer (3) are vertical to be installed in pump case (1), installation cavity (13) have been seted up on pump case (1), impeller (2) inlay to be established in installation cavity (13) and be connected with the motor output, just sprayer (3) respectively with water inlet (11), runner two (41) import intercommunication in impeller (2), set up on installation cavity (13) inside wall with water outlet (12) intercommunication cross mouth of a river (131), just seted up along circumference on installation cavity (13) inside wall respectively with cross mouth of a river (131), And a first flow passage (132) communicated with the inlet of the second flow passage (41) in the impeller (2).

2. The ejector pump according to claim 1, wherein the mounting cavity (13) is circular in cross section, and the first flow passage (132) is spirally formed along the circumferential inner wall of the mounting cavity (13).

3. The injection pump of claim 2, wherein the first flow passage (132) has a width gradually increasing from an end away from the water passing opening (131) to an end communicating with the water passing opening (131).

4. The injection pump according to claim 1, 2 or 3, wherein the pump housing (1) has a water inlet cavity (14) and a water outlet cavity (15) for stabilizing pressure, the water inlet (11) is communicated with the water inlet cavity (14), the water inlet cavity (14) is provided with an upper end and a lower end in a penetrating manner, the injector (3) is clamped in the water inlet cavity (14) and is communicated with the water inlet cavity (14), the water outlet (12) is located at the top of the pump housing (1) and is communicated with the water outlet cavity (15), and the water passing opening (131) is communicated with the water outlet (12) through the water outlet cavity (15).

5. The injection pump as claimed in claim 4, characterized in that a water passage (16) is arranged at the bottom in the pump shell (1), one end of the water passage (16) is communicated with the installation cavity (13), and the other end is clamped with the lower end of the injector (3).

6. The ejector pump according to claim 4, wherein the impeller (2) comprises a first disk body (21) and a second disk body (22) which are disc-shaped and are arranged at intervals, a plurality of water guide strips (4) which are curved in an arc shape are arranged between the first disk body (21) and the second disk body (22) at intervals along the circumferential direction, a second flow passage (41) communicated with the first flow passage (132) is formed between every two adjacent water guide strips (4), and a water inlet (211) communicated with each second flow passage (41) is formed in the center of the surface of the first disk body (21).

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