CN111441958A

CN111441958A - Pump and method of operating the same

Info

Publication number: CN111441958A
Application number: CN201910046114.2A
Authority: CN
Inventors: 尹斌; 王彬
Original assignee: Sanhua Aweco Appliance Systems Wuhu Co Ltd
Current assignee: Sanhua Aweco Appliance Systems Wuhu Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-07-24

Abstract

The invention provides a pump which comprises a housing, a driving device arranged at one end of the housing and a rear cover covering the driving device. The drive arrangement include the drive shaft and surround in the bearing of drive shaft periphery, first runner has been seted up to the bearing, first runner runs through the bearing to when the pump work, inside usable liquid flowed into the bearing, lubricated and cooling the bearing, make the lubricity of bearing better, the radiating effect is also better, prolonged the life of bearing.

Description

Pump and method of operating the same

Technical Field

The present invention relates to a pump.

Background

Motors are used to provide power in industries, household appliances, automobiles and other fields, so that the motors are widely applied, and the rotation of the motors needs to support a rotor by a bearing system and reduce the rotation friction loss. The common motor adopts a rolling bearing and a common friction bearing, and the rolling bearing and the common friction bearing both have improvable spaces.

Disclosure of Invention

The invention aims to provide a pump which is provided with a bearing with good lubricating property.

In order to achieve the above object, the present invention provides a pump, which includes a housing, a driving device installed at one end of the housing, and a rear cover covering the driving device, wherein the driving device includes a driving shaft and a bearing surrounding the driving shaft, the bearing is provided with a first flow passage, and the first flow passage penetrates through the bearing.

As a further improvement of the present invention, the bearing includes a first body and a second body connected to each other, a through hole is formed in the first body, a groove is recessed in an outer side wall of the second body, and the through hole is correspondingly communicated with the groove to form the first flow channel.

As a further improvement of the present invention, the first body and the second body are both disposed in a cylindrical shape, the diameter of the first body is larger than that of the second body, the through hole extends in a direction parallel to the axis of the first body, and the groove extends in a direction parallel to the axis of the second body.

As a further improvement of the present invention, a shaft passage is opened at a central position of the bearing, and the shaft passage penetrates from one end of the first main body to the other end of the second main body, so that the driving shaft can pass through the shaft passage.

As a further improvement of the invention, a plurality of through holes are arranged and uniformly distributed on the outer side of the shaft channel; the grooves are correspondingly arranged in a plurality and are uniformly distributed on the outer side wall of the second main body so as to be communicated with the corresponding through holes.

As a further improvement of the present invention, the driving device further includes a liquid distribution plate and a bearing support matched with the liquid distribution plate, a bearing chamber is arranged in the liquid distribution plate, a bearing chamber is also arranged in the bearing support, and two bearings are arranged and respectively accommodated in the two bearing chambers.

As a further improvement of the present invention, a second flow passage is opened on an inner wall of the bearing chamber, and the second flow passage is formed by being recessed from an inner wall surface of the bearing chamber.

As a further improvement of the present invention, the driving device further includes a rubber ring surrounding the outer periphery of the bearing, and the rubber ring is accommodated in the bearing chamber to seal a gap between the bearing and the bearing chamber.

As a further improvement of the present invention, a bearing accommodated in a bearing chamber of the bearing bracket is defined as a first bearing, a bearing accommodated in a bearing chamber of the liquid separation disc is defined as a second bearing, the driving device further includes a motor rotor surrounding the outer periphery of the driving shaft, and a stopper ring located between the motor rotor and the first bearing, the stopper ring being configured to prevent the motor rotor from moving toward the first bearing side.

As a further development of the invention, the retaining ring is fixedly connected to the motor rotor.

According to the technical scheme, the first flow channel is formed in the bearing and penetrates through the bearing, so that liquid can flow into the bearing from the first flow channel to lubricate the bearing when the pump works, and the bearing is good in lubricating property.

Drawings

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

Fig. 2 is a side view of the pump shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of a portion of the pump of fig. 2.

Fig. 4 is a schematic cross-sectional view of a portion of the pump of fig. 2 in another orientation.

Fig. 5 is a perspective view of the bearing of fig. 3.

Fig. 6 is a perspective view of the bearing of fig. 5 from another perspective.

Fig. 7 is a left side view of the bearing shown in fig. 5.

Reference numerals:

100-a pump; 1-a housing; 10-a housing chamber; 11-a body portion; 12-a liquid inlet pipeline; 13-a liquid outlet pipeline; 2-a drive device; 21-a drive shaft; 22-a motor rotor; 23-a motor stator assembly; 24-a liquid separating disc; 240-sealing ring; 25-a bearing; 251-a first flow channel; 252 — a first body; 253-a second body; 254-a through hole; 255-a groove; 256-axial channel; 257 — a first bearing; 258 — second bearing; 26-a bearing support; 27-lumen; 281-a first rubber ring; 282-a second rubber ring; 29-a stop ring; 3-an impeller; 31-medial axis; 32-impeller blades; 33-liquid inlet; 4-heating a tube; 5-rear cover.

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.

Referring to fig. 1-3, a pump 100 is disclosed. The pump 100 includes a housing 1, a driving device 2 installed at one end of the housing 1, an impeller 3 connected to the driving device 2 and accommodated in the housing 1, a heating device (not numbered) extending into the housing 1, and a rear cover 5 covering the driving device 2.

The housing 1 comprises a main body part 11 which is arranged in a column shape, a containing cavity 10 which is formed in the main body part 11, a liquid inlet pipeline 12 and a liquid outlet pipeline 13 which are connected with the main body part 11. The pipe wall of the liquid inlet pipe 12 is connected with the main body part 11, and one end of the liquid inlet pipe 12 extends into the accommodating cavity 10; the wall of the liquid outlet pipe 13 is connected to the main body 11, and both the liquid inlet pipe 12 and the liquid outlet pipe 13 are communicated with the accommodating cavity 10, so that liquid can enter the accommodating cavity 10 from the liquid inlet pipe 12 and then flow out from the liquid outlet pipe 13. The structure of the casing 1 can be designed to be the same as that of any of the casings of the prior art and is not described in detail here, nor is it limited.

Referring to fig. 3 to 7, the driving device 2 includes a driving shaft 21 extending into the receiving cavity 10, a motor rotor 22 surrounding an outer periphery of the driving shaft 21, a motor stator assembly 23 surrounding an outer periphery of the motor rotor 22, a liquid distribution plate 24 separating the motor rotor 22 from the motor stator assembly 23, a bearing 25 surrounding an outer periphery of the driving shaft 21, and a bearing support 26 for supporting and fixing the driving shaft 21.

In the present embodiment, the extension direction of the drive shaft 21 is the same as the liquid inlet direction. The liquid separation disc 24 is matched with the main body part 11 to separate the motor rotor 22 from the motor stator assembly 23, so that water and electricity separation between the motor rotor 22 and the motor stator assembly 23 is achieved. Further, in this embodiment, a sealing ring 240 is disposed between the liquid distribution plate 24 and the main body portion 11 of the housing 1, that is, the sealing ring 240 is clamped between the main body portion 11 and the liquid distribution plate 24 along the axial direction of the driving shaft 21, so as to enhance the sealing effect between the main body portion 11 and the liquid distribution plate 24.

The bearing 25 is made of synthetic plastics, graphite, metal materials and the like, so that the bearing has the advantages of good self-lubricating property, wear resistance, long service life and low cost. The bearing 25 is provided with a first flow passage 251, and the first flow passage 251 is arranged to penetrate through the bearing 25. Specifically, the bearing 25 includes a first body 252 and a second body 253 connected to each other, a through hole 254 is formed in the first body 252, a groove 255 is recessed in an outer side wall of the second body 253, and the through hole 254 is correspondingly communicated with the groove 255 to form the first flow passage 251.

The through hole 254 extends in a direction parallel to the axis of the first body 252, where "the axis of the first body 252" may also be understood as "the connecting direction of the first body 252 and the second body 253", the groove 255 extends in a direction parallel to the axis of the second body 253, and where "the axis of the second body 253" may also be understood as "the connecting direction of the first body 252 and the second body 253"; the first body 252 and the second body 253 are both disposed in a cylindrical shape, and the diameter of the first body 252 is larger than that of the second body 253, so that the through hole 254 corresponds to the groove 255.

A shaft 256 is disposed at a central position of the bearing 25, and the shaft 256 penetrates from one end of the first body 252 to the other end of the second body 253, that is, the shaft 256 penetrates through the bearing 25 along a connecting direction of the first body 252 and the second body 253, so that the driving shaft 21 can pass through the bearing. In the present invention, the through holes 254 are provided in plurality and uniformly distributed on the outer side of the shaft passage 256; the plurality of grooves 255 are correspondingly disposed and uniformly distributed on the outer side wall of the second body 253 to communicate with the corresponding through holes 254.

Of course, the first body 252, the second body 253 and the first flow channel 251 may be configured in other structures as long as the liquid can enter the bearing 25 to lubricate and cool the bearing 25, which is not limited herein.

The bearing bracket 26 is connected and positioned on the liquid distribution disc 24 and is arranged perpendicular to the axial direction of the driving shaft 21 to separate the accommodating cavity 10 from the motor rotor 22. The driving shaft 21 penetrates the bearing support 26 and is fixed to the liquid separation disc 24 and the bearing support 26 through the bearing 25. The bearing support 26 and the liquid-separating disc 24 cooperate to form an inner cavity 27 enclosed between the bearing support 26 and the liquid-separating disc 24, the motor rotor 22 is accommodated in the inner cavity 27, and the liquid (i.e. the transmission medium) in the accommodating cavity 10 can enter the inner cavity 27 along a gap at the connecting position of the bearing support 26 and the driving shaft 21 on one hand, and can enter the inner cavity 27 through an exhaust hole (not shown) formed in the bearing support 26 on the other hand, and is in contact with the motor rotor 22 to take away heat generated during the operation of the motor rotor 22, so as to prevent abnormal use of the pump 100 caused by over-high operating temperature of the motor rotor 22, and achieve the purpose of prolonging the service life of the pump 100 of the present invention.

A first bearing chamber (not numbered) is arranged in the bearing support 26, a second bearing chamber (not numbered) is arranged in the liquid separating disc 24, and two bearings 25 are arranged and correspondingly accommodated in the first bearing chamber and the second bearing chamber. A second flow passage (not shown) is formed in the inner wall of the first bearing chamber, and the second flow passage is formed by sinking from the inner wall surface of the first bearing chamber; a second flow passage (not shown) is also formed in the inner wall of the second bearing chamber, and the second flow passage is recessed from the inner wall surface of the second bearing chamber. Here: the second flow channel arranged on the inner wall of the first bearing chamber has the same structure as the second flow channel arranged on the inner wall of the second bearing chamber; of course, the structure may be different, and is not limited thereto.

The bearing 25 accommodated in the first bearing chamber is defined as a first bearing 257, the bearing 25 accommodated in the second bearing chamber is defined as a second bearing 258, and the first flow channel 251 is opened on both the first bearing 257 and the second bearing 258. The driving device 2 further includes a first rubber ring 281 surrounding the outer periphery of the first bearing 257 and a second rubber ring 282 surrounding the outer periphery of the second bearing 258, wherein the first rubber ring 281 is received in the first bearing chamber and sleeved outside the second body 253 of the first bearing 257 to seal a gap between the first bearing 257 and the first bearing chamber; the second rubber ring 282 is received in the second bearing chamber and is sleeved on the outer side of the second body 253 of the second bearing 258 to seal the gap between the second bearing 258 and the second bearing chamber.

When the pump 100 is operating, for the first bearing 257 and the first bearing chamber: the first flow channel 251 is arranged, on one hand, liquid (i.e. a transmission medium) in the accommodating cavity 10 and the inner cavity 27 can enter the first bearing 257 through the first flow channel 251, so as to lubricate and dissipate heat of the first bearing 257, and prolong the service life of the first bearing 257; on the other hand, when the driving shaft 21 and the first bearing 257 rotate relatively, the concave groove 255 is located at the connecting position of the second body 253 and the first rubber ring 281, so that the friction force between the first bearing 257 and the first rubber ring 281 can be increased, and the first bearing 257 and the first rubber ring 281 are prevented from sliding relatively to wear the first rubber ring 281. The second flow passage can enhance the passing performance of liquid in the first bearing chamber; on the other hand, the friction between the first rubber ring 281 and the bearing bracket 26 can be increased to prevent the first rubber ring 281 from rotating and wearing, thereby prolonging the service life of the whole pump 100.

For the second bearing 258 and second bearing chamber: the first flow channel 251 is arranged, on one hand, liquid (i.e. transmission medium) in the inner cavity 27 can enter the second bearing 258 through the first flow channel 251, so that the second bearing 258 is lubricated and cooled, and the service life of the second bearing 258 is prolonged; on the other hand, when the driving shaft 21 and the second bearing 258 rotate relatively, the groove 255 is located at the connecting position of the second body 253 and the second rubber ring 282, so that the friction force between the second bearing 258 and the second rubber ring 282 can be increased, and the second bearing 258 and the second rubber ring 282 are prevented from sliding relatively to each other to cause abrasion of the second rubber ring 282. The arrangement of the second flow passage can enhance the passing performance of liquid in the second bearing chamber on one hand; on the other hand, the friction between the second rubber ring 282 and the liquid-separating disc 24 can be increased to prevent the second rubber ring 282 from rotating and wearing, thereby prolonging the service life of the whole pump 100.

The driving device 2 further includes a stop ring 29 disposed between the motor rotor 22 and the first bearing 257, where the stop ring 29 is fixedly connected to the motor rotor 22 and is used for preventing the motor rotor 22 from moving toward the first bearing 257. Of course, when the pump 100 is in operation, the fluid entering the first bearing chamber from the first flow passage 251 of the first bearing 257 lubricates and cools the first bearing 257 and the stop ring 29 simultaneously, thereby prolonging the service life of the first bearing 257 and the stop ring 29.

Therefore, the first flow channel 251 is formed in the bearing 25, so that liquid can conveniently flow into the bearing 25 from the first flow channel 251, the bearing 25 has better lubricating property and heat dissipation performance, and the service life of the bearing 25 is prolonged; the friction force between the bearing 25 and the first rubber ring 281 and the second rubber ring 282 can be increased, and the bearing 25 and the first rubber ring 281 and the second rubber ring 282 are prevented from sliding relatively to each other to cause the first rubber ring 281 and the second rubber ring 282 to be worn; meanwhile, the weight of the bearing 25 can be reduced, and the material cost is saved.

Referring to fig. 3 and 4, the impeller 3 has a central shaft 31 fixed on the driving shaft 21, a plurality of impeller blades 32 surrounding the central shaft 31, and a liquid inlet 33 located at one end of the central shaft 31 and far away from the driving device 2. The middle shaft 31 drives the impeller 3 to rotate under the action of the driving shaft 21; a liquid outlet (not numbered) is formed between the adjacent impeller blades 32; the liquid inlet 33 is communicated with the liquid inlet pipeline 12, so that liquid enters the impeller 3 through the liquid inlet 33 after entering from the liquid inlet pipeline 12, and then flows out from the liquid outlet.

The heating device comprises a heating pipe 4 accommodated in the accommodating cavity 10, the heating pipe 4 is spirally accommodated in the accommodating cavity 10 to directly contact with liquid in the accommodating cavity 10 for heat exchange, so that the heating efficiency of the liquid in the accommodating cavity 10 is effectively improved, and the heating uniformity of the heating pipe 4 when heating the liquid is ensured.

The rear cover 5 covers the rear side of the driving device 2, and is used for protecting the driving device 2 to prevent the driving device 2 from being damaged.

In the use of the pump 100 of the present invention, first, liquid (i.e. a transmission medium) enters the housing chamber 10 through the liquid inlet pipe 12 and enters the impeller blades 32 through the liquid inlet 33 under the rotation action of the impeller 3; then, the liquid flows out along the liquid outlet between the impeller blades 32, a part of the liquid enters the inner cavity 27 through the exhaust hole and the gap between the driving shaft 21 and the bearing support 26, contacts with the motor rotor 22 to take away heat generated by the motor rotor 22 during operation, and then flows into the accommodating cavity 10 again to contact with the heating pipe 4 under the driving of the impeller 3, so as to complete heating; the other part of the liquid is in full contact with the heating pipe 4 in the accommodating cavity 10 to complete heating; finally, the heated liquid flows out through the liquid outlet pipeline 13; at this point, the heating and pumping of the liquid is completed, while also reducing the temperature of the motor rotor 22.

In summary, in the pump 100 of the present invention, the bearing 25 is provided with the first flow channel 251, and the first flow channel 251 penetrates through the bearing 25, so that when the pump 100 works, liquid can conveniently flow into the bearing 25 from the first flow channel 251 to lubricate and cool the bearing 25, which not only enables the bearing 25 to have good lubricity and good heat dissipation effect, but also prolongs the service life of the bearing 25; the friction force between the bearing 25 and the first rubber ring 281 and the second rubber ring 282 can be increased, and the bearing 25 and the first rubber ring 281 and the second rubber ring 282 are prevented from sliding relatively to each other to cause the first rubber ring 281 and the second rubber ring 282 to be worn; meanwhile, the weight of the bearing 25 can be reduced, and the material cost is saved.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A pump, includes the housing, install in the drive arrangement of housing one end and cover the back lid of drive arrangement, drive arrangement includes the drive shaft and surrounds in the bearing of drive shaft periphery, its characterized in that: the bearing is provided with a first flow passage, and the first flow passage penetrates through the bearing.

2. The pump of claim 1, wherein: the bearing comprises a first main body and a second main body which are connected with each other, a through hole is formed in the first main body, a groove is formed in the outer side wall of the second main body in a concave mode, and the through hole is communicated with the groove in a corresponding mode to form the first flow channel.

3. The pump of claim 2, wherein: the first main body and the second main body are both in cylindrical arrangement, the diameter of the first main body is larger than that of the second main body, the through hole extends along the axial lead direction parallel to the first main body, and the groove extends along the axial lead direction parallel to the second main body.

4. The pump of claim 3, wherein: the bearing is provided with a shaft channel at the center, and the shaft channel penetrates from one end of the first main body to the other end of the second main body so as to allow the driving shaft to penetrate through the shaft channel.

5. The pump of claim 4, wherein: the through holes are arranged in plurality and are uniformly distributed on the outer side of the shaft channel; the grooves are correspondingly arranged in a plurality and are uniformly distributed on the outer side wall of the second main body so as to be communicated with the corresponding through holes.

6. The pump of claim 1, wherein: the driving device further comprises a liquid separating disc and a bearing support matched with the liquid separating disc, a bearing chamber is arranged in the liquid separating disc, a bearing chamber is also arranged in the bearing support, and two bearings are arranged and are respectively contained in the two bearing chambers.

7. The pump of claim 6, wherein: and a second flow passage is formed on the inner wall of the bearing chamber and is formed by sinking from the inner wall surface of the bearing chamber.

8. The pump of claim 6, wherein: the driving device further comprises a rubber ring surrounding the periphery of the bearing, and the rubber ring is contained in the bearing chamber so as to seal a gap between the bearing and the bearing chamber.

9. The pump of claim 6, wherein: the bearing contained in the bearing chamber of the bearing support is defined as a first bearing, the bearing contained in the bearing chamber of the liquid separating disc is defined as a second bearing, the driving device further comprises a motor rotor surrounding the periphery of the driving shaft and a stop ring located between the motor rotor and the first bearing, and the stop ring is used for preventing the motor rotor from moving towards one side of the first bearing.

10. The pump of claim 9, wherein: the stop ring is fixedly connected with the motor rotor.