CN110857693A - Pump and method of operating the same - Google Patents

Abstract

The invention provides a pump which comprises a driving end and a working end. The drive end is located to one side of the working end and includes a motor having a drive shaft. The working end comprises a first impeller, a second impeller and a pump cylinder body, wherein the first impeller and the second impeller are arranged on the driving shaft, and the pump cylinder body is covered outside the first impeller and the second impeller. The pump cylinder body is provided with a liquid inlet pipe and a liquid outlet pipe which are far away from the motor and are positioned at the other side of the working end. The liquid inlet pipe is arranged along the axial direction of the driving shaft, and the liquid outlet pipe extends along the tangential direction of the pump cylinder body. The working end also comprises a heating device arranged in the pump cylinder body. The pump has compact structure and can generate high-temperature and high-pressure liquid.

Description

Pump and method of operating the same

Technical Field

The invention relates to the field of pumps, in particular to a pump applied to a dish washing machine.

Background

The pump is an important part in the dish washer, in the related art, the water is heated by arranging the heater in the water tank, and the pump starts to work after the water is heated to a certain temperature, so that the washing time is wasted; meanwhile, along with the development of the market of the dish washing machine, higher requirements are provided for the structure of the dish washing machine, and the pump is developed from the original single function to multiple functions so as to meet the high requirements of the dish washing machine on the space, so how to integrate multiple functions in the same pump, and higher requirements are provided for the internal structure design of the pump.

Disclosure of Invention

The invention aims to provide a pump which has a compact structure and can generate high-temperature and high-pressure liquid.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a pump, includes drive end and work end, the drive end is located one side of work end and including the motor that has the drive shaft, the work end is located including setting up first impeller, second impeller and the cover in the drive shaft are located first impeller with the outer pump barrel body of second impeller, be equipped with on the pump barrel body and keep away from the motor sets up and is located the feed liquor pipe of work end opposite side and is located feed liquor pipe with drain pipe between the drive end, the work end still including install in heating device in the pump barrel body.

Optionally, the liquid inlet pipe is arranged along the axial direction of the driving shaft, and the liquid outlet pipe extends along the tangential direction of the pump cylinder.

Optionally, the pump cylinder body includes a main body portion and an extension portion protruding outward from the main body portion, and the heating device is disposed in the extension portion.

Optionally, the extension portion is disposed on the lower portion of the pump cylinder, and the liquid outlet pipe is disposed on the upper portion of the pump cylinder.

Optionally, the first impeller includes a first impeller blade sleeved on the driving shaft, a first pump casing covering the periphery of the first impeller blade, and a first impeller cavity formed in the first pump casing; the second impeller comprises a second impeller blade sleeved on the driving shaft, a second pump shell covering the periphery of the second impeller blade and a second impeller cavity formed in the second pump shell.

Optionally, a partition wall for partitioning the first impeller cavity and the second impeller cavity is arranged on the first pump shell and/or the second pump shell; the first impeller cavity forms a low pressure region and the second impeller cavity forms a high pressure region.

Optionally, the first impeller is close to the liquid inlet pipe sets up, the second impeller is close to the motor sets up, be equipped with on the first impeller towards the first inlet that the liquid inlet pipe set up, be equipped with on the second impeller towards the second inlet that the motor set up.

Optionally, a shaft hole for the driving shaft to pass through is formed in the partition wall, and a throttling sleeve sleeved on the driving shaft and an adjusting pad arranged between the throttling sleeve and the shaft hole are arranged in the shaft hole.

Optionally, the working end further includes a sleeve sleeved outside the second pump housing and disposed close to the driving end, the first pump housing and the pump cylinder are relatively fixedly mounted, the second pump housing and the sleeve are relatively fixedly mounted, and the first pump housing and the second pump housing are relatively fixedly mounted.

Optionally, the heating device includes a clamping portion fixedly connected to the extending portion and a heating pipe fixedly connected to the clamping portion, and the working end further includes a sealing member disposed between the heating device and the extending portion.

According to the technical scheme, the first impeller and the second impeller are installed in the pump cylinder, the heating device is installed in the pump cylinder, the liquid inlet is arranged far away from the motor, the liquid outlet is arranged close to the motor, so that liquid flowing out of the first impeller cavity flows into the extending part and is heated in the extending part, the heated liquid flows into the second impeller cavity again, high-temperature and high-pressure liquid is discharged through pressurization of the second impeller, the working time of the pump is shortened, and the pump is compact in overall structure.

Drawings

Fig. 1 is a perspective view of the pump of the present invention.

Fig. 2 is a schematic sectional view of the pump of the present invention.

Fig. 3 is an exploded perspective view of the pump of the present invention at an angle disassembled in the axial direction of the drive shaft.

Fig. 4 is a perspective exploded view of the pump of the present invention at another angle disassembled in the axial direction of the drive shaft.

Fig. 5 is a schematic structural view of the pump cartridge of fig. 3.

Fig. 6 is a schematic structural view of the first pump case of fig. 3.

Fig. 7 is a schematic view of the sleeve of fig. 3.

Fig. 8 is a structural schematic view of the second pump casing of fig. 3.

Reference numerals: 100-a pump; 1-a pump cylinder; 11-a body portion; 110 — a first chamber; 111-the peripheral wall; 112-opening; 113-a limit groove; 12-an extension; 120-a second chamber; 13-a liquid inlet pipe; 14-a liquid outlet pipe; 2-a first impeller; 21-first impeller blades; 201-a first liquid inlet; 3-a second impeller; 31-a second impeller blade; 4-a motor; 41-a drive shaft; 42-a motor rotor; 43-a motor stator assembly; 44-a water diversion disc; 45-a bearing; 441-an extension wall; 442-a scaffold; 5-a sleeve; 51-cartridge housing; 50-an accommodating cavity; 501-a first accommodating cavity; 502-a second receiving cavity; 52-a partition wall; 520-escape port; 511-a first cartridge wall; 512-a second cartridge wall; 5110-a first via; 5120-a second via; 513-positioning grooves; 6-a first pump housing; 60-a first impeller cavity; 61-a first peripheral wall; 611-positioning ribs; 62-a first inner circumferential wall; 621-positioning card slot; 7-a second pump housing; 70-a second impeller cavity; 71-a second peripheral wall; 711-positioning ribs; 72-a second inner circumferential wall; 721-positioning ribs; 73-spacer wall; 730-shaft hole; 731-throttle sleeve; 8-adjusting the cushion; 9-a heating device; 91-a catch; 92-heating the tube; 93-sealing member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 8, the present invention discloses a pump 100, which includes a working end and a driving end located at one side of the working end. The working end comprises a first impeller 2, a second impeller 3, a sleeve 5 covering the second impeller 3, a pump cylinder 1 covering the first impeller 2, the second impeller 3 and the sleeve 5 and a heating device 9 arranged in the pump cylinder 1. The driving end is a motor 4 for driving the first impeller 2 and the second impeller 3 to rotate.

The motor 4 is provided with a drive shaft 41 extending into the pump cylinder 1, a motor rotor 42 surrounding the outer periphery of the drive shaft 41, a motor stator assembly 43 surrounding the outer periphery of the motor rotor 42, a water diversion disc 44 separating the motor rotor 42 from the motor stator assembly 43, and two bearings 45 mounted on the drive shaft 41. Two bearings 45 are provided at both ends of the motor rotor 42. The water diversion disk 44 is provided with an extension wall 441 that separates the motor rotor 42 from the motor stator assembly 43 inside and outside, and brackets 442 that position the two bearings 45, respectively. The bracket 442 is used to position the bearing 45 to better assist in the fit between the bearing 45 and the drive shaft 41. The motor 4 may be a dc brushless motor, or may be a single-phase asynchronous motor, which is not limited herein.

Referring to fig. 5 in conjunction with fig. 1 to 4, the pump cylinder 1 includes a cylindrical main body 11, a first chamber 110 formed in the main body 11, an extending portion 12 extending outward from a radial direction of the main body 11, a second chamber 120 formed in the extending portion 12, a liquid inlet pipe 13 disposed along an axial direction of the driving shaft 41 and communicating with the first chamber 110, and a liquid outlet pipe 14 disposed along a direction perpendicular to the extending direction of the liquid inlet pipe 13 and communicating with the first chamber 110. The peripheral wall 111 of the body 11 is provided with an opening 112 penetrating the body 11 and at least one stopper groove 113. The opening 112 communicates the first chamber 110 with the second chamber 120 in the radial direction of the drive shaft 41, and the opening 112 extends in the axial direction of the drive shaft 41; the stopper groove 113 is circumferentially provided around the main body portion 11.

The liquid inlet pipe 13 is arranged on the pump cylinder body 1, is positioned at the other side of the working end and is far away from the motor 4, and the liquid outlet pipe 14 is arranged on the pump cylinder body 1 and is positioned between the liquid inlet pipe 13 and the driving end, namely, is closer to the motor 4 than the liquid inlet pipe 13. Specifically, the extending direction of the drive shaft 41 is defined as the left-right direction, and the nozzle orientation direction of the liquid inlet pipe 13 is defined as the left direction. That is, the liquid inlet pipe 13 is disposed at the left end of the pump cylinder 1, the liquid outlet pipe 14 is disposed near the right end of the pump cylinder 1, the liquid outlet pipe 14 extends in the tangential direction of the main body 11, and the extending direction of the extending portion 12 in the radial direction of the driving shaft 41 is opposite to the direction of the nozzle of the liquid outlet pipe 14. In the present embodiment, the extension portion 12 is provided in a fan shape at the lower portion of the pump cylinder 1, and the liquid outlet pipe 14 is provided at the upper portion of the pump cylinder 1.

Referring to fig. 6 in combination with fig. 1 to 4, the first impeller 2 and the second impeller 3 are coaxially disposed on the driving shaft 41, and the first impeller 2 includes a first impeller blade 21 sleeved on the driving shaft 41, a first pump housing 6 covering the outer periphery of the first impeller blade 21, and a first impeller cavity 60 formed in the first pump housing 6. The first pump case 6 is disposed near the left end of the pump cylinder 1, and includes a first outer circumferential wall 61, a first inner circumferential wall 62 disposed at a distance from the first outer circumferential wall 61, and a first impeller chamber 60 formed in the first inner circumferential wall 62. The first impeller cavity 60 is adapted to receive the first impeller blades 21. The first peripheral wall 61 is provided with a plurality of positioning ribs 611 protruding outwards, the positioning ribs 611 are circumferentially arranged around the first peripheral wall 61, and the positioning ribs 611 correspond to the limiting grooves 113 in position. When the first pump case 6 is mounted to the pump cylinder 1, the positioning rib 611 cooperates with the limiting groove 113 to fix the first pump case 6 in the pump cylinder 1. The first inner circumferential wall 62 is provided with a plurality of positioning slots 621 protruding toward the first outer circumferential wall 61, and the positioning slots 621 are circumferentially arranged around the first inner circumferential wall 62. The first impeller blades 21 are provided with a first inlet 201 arranged towards the inlet pipe 13 for letting liquid flow into the first impeller chamber 60.

Referring to fig. 7 in conjunction with fig. 1 to 4, both ends of the sleeve 5 are open. The sleeve 5 includes a cylindrical housing 51, a housing chamber 50 formed in the housing 51, a partition wall 52 dividing the housing chamber 50 into a first housing chamber 501 and a second housing chamber 502, and a relief opening 520 extending through the partition wall 52 in the left-right direction. The cartridge 51 includes a first cartridge wall 511 located at the outer periphery of the first receiving cavity 501 and a second cartridge wall 512 located at the outer periphery of the second receiving cavity 502. The first wall 511 is provided with a first through hole 5110, and the second wall 512 is provided with a second through hole 5120 and a plurality of positioning grooves 513 formed by inward sinking from the edge of the second wall 512. When the sleeve 5 is installed in the pump cylinder 1, the cylinder shell 51 is attached to the inner wall surface of the pump cylinder 1, the first through hole 5110 corresponds to the opening 112 to communicate the first receiving cavity 501 with the second cavity 120 in the extension portion 12, and the second through hole 5120 corresponds to the liquid outlet pipe 14 to communicate the second receiving cavity 502 with the liquid outlet pipe 14.

Referring to fig. 8 in combination with fig. 1 to 4, the second impeller 3 includes a second impeller blade 31 sleeved on the driving shaft 41, a second pump housing 7 covering the outer periphery of the second impeller blade 31, and a second impeller cavity 70 formed in the second pump housing 7. The second pump case 7 is provided near the right end of the pump cylinder 1, and is entirely housed in the pump cylinder 1. A second liquid inlet (not numbered) facing the motor 4 is arranged on the second impeller blade 31. I.e. the second inlet port is directed in the opposite direction to the first inlet port 201. So set up for the axial force between first impeller 2 and the second impeller 3 offsets each other, has prolonged the life of two bearings 45 of motor 4.

The second pump housing 7 includes a second outer circumferential wall 71, a second inner circumferential wall 72 disposed at a distance from the second outer circumferential wall 71, a partition wall 73 connecting left side edges of the second inner circumferential wall 72, a second impeller chamber 70 formed between the second inner circumferential wall 72 and the partition wall 73, and shaft holes 730 penetrating the partition wall 73 in the left and right for the drive shaft 41 to pass through. The second impeller cavity 70 is configured to receive the second impeller blade 31. Partition wall 73 serves to separate first impeller chamber 60 from second impeller chamber 70 to prevent liquid from flowing directly from first impeller chamber 60 into second impeller chamber 70. A throttle sleeve 731 sleeved on the driving shaft 41 and an adjusting pad 8 arranged between the throttle sleeve 731 and the shaft hole 730 are arranged in the shaft hole 730. The throttle sleeve 731 is used on the one hand to support the mounting of the first impeller 2 and the second impeller 3 and on the other hand to throttle the high pressure liquid in the second impeller chamber 70. The throttle sleeve 731 is made of metal material, alloy material or other common wear-resistant materials. The adjustment pad 8 further seals the first impeller cavity 60 from the second impeller cavity 70 in the axial direction, thereby avoiding the flow of liquid from the high pressure region in the second impeller cavity 70 into the low pressure region of the first impeller cavity 60; at the same time, the adjusting pad 8 also dampens the radial run-out between the throttle sleeve 731 and the drive shaft 41.

It should be noted that the partition wall 73 may be provided on the first pump housing 6, or the partition wall 73 may be provided on both the first pump housing 6 and the second pump housing 7, so long as the first impeller chamber 60 and the second impeller chamber 70 are ensured to be separated.

The second peripheral wall 71 is provided with a plurality of positioning convex ribs 711 which protrude outwards, and the positioning convex ribs 711 are arranged around the circumference of the second peripheral wall 71; the positioning ribs 711 correspond to the positioning grooves 513 on the sleeve 5, and when the second pump housing 7 is mounted in the sleeve 5, the positioning ribs 711 cooperate with the positioning grooves 513 to fix the second pump housing 7 in the second receiving cavity 502 of the sleeve 5, so as to relatively fixedly connect the second pump housing 7 and the sleeve 5.

The second inner peripheral wall 72 is provided with a plurality of positioning convex strips 721 protruding towards the second outer peripheral wall 71, and the positioning convex strips 721 are arranged around the second inner peripheral wall 72 in the circumferential direction; the positioning protruding strips 721 correspond to the positioning locking grooves 621 on the first pump housing 6 in position, and the positioning protruding strips 721 are matched with the positioning locking grooves 621 to relatively and fixedly connect the second pump housing 7 and the first pump housing 6, so as to limit the installation position of the pump cylinder 1 and the sleeve 5.

When the first pump housing 6 and the second pump housing 7 are fixed to each other, the partition wall 73 closes one end of the second impeller chamber 70, and the positioning protrusion 721 of the second pump housing 7 is held in the positioning catching groove 621 of the first pump housing 6, thereby relatively fixing the first pump housing 6 and the second pump housing 7 in the radial direction of the drive shaft 41.

The heating device 9 is disposed in the extending portion 12, and includes a holding portion 91 fixedly connected to the extending portion 12 and a heating pipe 92 fixedly connected to the holding portion 91, wherein the heating pipe 92 is a U-shaped pipe, and the extending direction of the heating pipe 92 is the same as the extending direction of the driving shaft 41, that is, the heating pipe 92 is installed in the second chamber 120. With the arrangement, the liquid flowing through the second chamber 120 can fully exchange heat with the heating pipe 92, and because the heating pipe 92 is arranged below the liquid outlet pipe 14, gas in the liquid in the second chamber 120 can be naturally discharged, and the heating pipe 92 is located at the lower part of the pump cylinder body 1 and can be completely immersed in the liquid in the second chamber 120, so that the heating pipe 92 is prevented from being burnt, and product damage is avoided.

The pump 100 also includes a seal 93 disposed between the catch 91 and the side wall of the extension 12. The seal 93 serves to seal the connection between the heating device 9 and the extension 12, thereby avoiding leakage of liquid inside the extension 12 from between the heating device 9 and the extension 12.

In the present invention, the sequence of mounting the working end to the driving shaft 41 of the driving end is as follows, firstly, the sleeve 5 is sleeved on the driving shaft 41 and slides to the water diversion disc 44 to seal one end of the first accommodating cavity 501 of the sleeve 5, then the second impeller 3 is sleeved on the driving shaft 41 and slides to the second accommodating cavity 502 accommodated in the sleeve 5, and simultaneously the second pump casing 7 is sleeved on the driving shaft 41 and slides to the second accommodating cavity 502, at this time, the second impeller 31 is accommodated in the first impeller cavity 70 of the second pump casing 7; then, the throttling sleeve 731, the adjusting pad 8 and the first pump housing 6 are sleeved on the driving shaft 41 in sequence, the positioning convex strips 721 are matched with the positioning clamping grooves 621 to relatively and fixedly connect the second pump housing 7 and the first pump housing 6, and the first impeller cavity 60 and the second impeller cavity 70 are separated at intervals by the partition wall 73 so as to ensure that the first impeller cavity 60 and the second impeller cavity 70 are not integrally communicated in the axial direction of the driving shaft 41; then, the first impeller blades 21 are installed in the first impeller cavity 60, the pump barrel 1 is sleeved on the peripheries of the first pump shell 6, the second pump shell 7 and the sleeve 5, and the positioning ribs 611 and the limiting grooves 113 are mutually clamped and matched so as to relatively fix the first pump shell 6 and the pump barrel 1. To this end, the assembly of the pump 100 is complete. In the present embodiment, the first impeller chamber 60 and the second impeller chamber 70 are not communicated in the axial direction of the drive shaft 41, and the communication is achieved by the second chamber 120 in the extension portion 12.

The operation of pump 100 is described below (fluid flow is shown by the arrows in fig. 2): liquid flows into the pump cylinder 1 through the liquid inlet pipe 13, the first impeller 2 sucks the liquid into the first impeller cavity 60 and pressurizes the liquid along the axial direction through the first liquid inlet 201, the first impeller 2 rotates to drive the liquid to move radially and throws the liquid out to the second cavity 120, the liquid is heated through the heating pipe 92 in the extension part 12, the heated liquid flows into the first accommodating cavity 501 through the opening 112 and the first through hole 5110, the second impeller 3 sucks the heated liquid along the axial direction through the second liquid inlet and pressurizes the liquid, and then the liquid is discharged through the second through hole 5120 and the liquid outlet pipe 14, so that the heated liquid is conveyed. In this process, the impeller is used in conjunction with the pump casing, and the pump casing is designed to achieve a volume change through an axial area change.

In summary, the pump 100 of the present invention has the first impeller 2 and the second impeller 3 disposed in the pump cylinder 1, the heating device 9 is disposed in the pump cylinder 1, the liquid inlet 13 is disposed away from the motor 4, and the liquid outlet 14 is disposed close to the motor 4, so that the liquid flowing out of the first impeller cavity 60 flows into the extension portion 12 and is heated in the extension portion 12, and the heated liquid flows into the second impeller cavity 70 and is discharged through the second impeller 3 under increased pressure, so that the pump 100 of the present invention can provide a water column with high temperature and high pressure, and a dishwasher using the pump 100 of the present invention can have strong washing and decontamination capability, and improve the working efficiency of the pump 100, and the overall structure is compact.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. The plurality in the present application includes two and more. When two parts are connected in this application, the lumens of the two parts are also in communication with each other. For example, the collecting pipe and the heat exchange pipe are both provided with inner cavities for circulating heat exchange media, and when the collecting pipe and the heat exchange pipe are connected with each other, the inner cavities of the collecting pipe and the heat exchange pipe are communicated.

In the case of no conflict, the various embodiments in the present application may complement each other.

Terms such as "upper," "lower," "left," "right," "front," "rear," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims. In addition, the descriptor "horizontal" as used herein is not entirely equivalent to allowing an angular tilt along a direction perpendicular to the direction of gravity.

In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on those skilled in the art, for example, "front and back through" means through before installing other parts, but those skilled in the art should understand that those skilled in the art can still make modifications or equivalent substitutions on the present invention, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims (10)

1. A pump comprising a drive end and a working end, the drive end being located to one side of the working end and comprising a motor having a drive shaft, characterized in that: the working end is including setting up first impeller, second impeller and the cover in the drive shaft are located first impeller with the outer pump barrel body of second impeller, be equipped with on the pump barrel body and keep away from the motor sets up and is located the feed liquor pipe of working end opposite side and is located feed liquor pipe with drain pipe between the drive end, the working end still including install in heating device in the pump barrel body.

2. The pump of claim 1, wherein: the liquid inlet pipe is arranged along the axial direction of the driving shaft, and the liquid outlet pipe extends along the tangential direction of the pump cylinder body.

3. The pump of claim 1, wherein: the pump cylinder body comprises a main body part and an extension part protruding outwards from the main body part, and the heating device is arranged in the extension part.

4. The pump of claim 3, wherein: the extension portion is arranged on the lower portion of the pump cylinder, and the liquid outlet pipe is arranged on the upper portion of the pump cylinder.

5. The pump of claim 1, wherein: the first impeller comprises first impeller blades sleeved on the driving shaft, a first pump shell covering the periphery of the first impeller blades and a first impeller cavity formed in the first pump shell; the second impeller comprises a second impeller blade sleeved on the driving shaft, a second pump shell covering the periphery of the second impeller blade and a second impeller cavity formed in the second pump shell.

6. The pump of claim 5, wherein: a partition wall for partitioning the first impeller cavity and the second impeller cavity is arranged on the first pump shell and/or the second pump shell; the first impeller cavity forms a low pressure region and the second impeller cavity forms a high pressure region.

7. The pump of claim 1, wherein: the first impeller is close to the liquid inlet pipe is arranged, the second impeller is close to the motor is arranged, the first impeller is provided with a first liquid inlet facing the liquid inlet pipe, and the second impeller is provided with a second liquid inlet facing the motor.

8. The pump of claim 6, wherein: the partition wall is provided with a shaft hole for the driving shaft to pass through, and the shaft hole is internally provided with a throttling sleeve sleeved on the driving shaft and an adjusting pad arranged between the throttling sleeve and the shaft hole.

9. The pump of claim 5, wherein: the working end further comprises a sleeve which is sleeved outside the second pump shell and is close to the driving end, the first pump shell and the pump cylinder body are relatively fixedly installed, the second pump shell and the sleeve are relatively fixedly installed, and the first pump shell and the second pump shell are relatively fixedly installed.

10. The pump of claim 3, wherein: the heating device comprises a clamping part fixedly connected with the extending part and a heating pipe fixedly connected with the clamping part, and the working end further comprises a sealing element arranged between the heating device and the extending part.

Images