阅读说明：本技术 一种高效离心泵转子支撑端安装机构 (High-efficient centrifugal pump rotor supports end installation mechanism ) 是由 张家旸 于 2020-07-28 设计创作，主要内容包括：本发明提供了一种高效离心泵转子支撑端安装机构,属于机械技术领域。本发明中,离心泵包括泵体和设于泵体外的桶体,转子水平设于泵体内,转子支撑端穿过泵体并位于桶体内,且桶体和转子通过轴承连接,桶体靠近泵体的一端通过油封与转子形成密封,桶体另一端封闭,桶体上侧竖直贯穿有注油孔,注油孔上端内竖直插有油管,油管和桶体密封固连,油管上端伸出注油孔并伸入罩体,罩体内壁和油管之间形成气道,油管上端外壁的一侧为平面一,罩体内壁上具有与平面一紧密接触的平面二,平面二上水平贯穿有孔二,平面一上设有孔一,孔一和孔二内卡设有同一根销轴。本发明寿命长。(The invention provides a high-efficiency centrifugal pump rotor supporting end mounting mechanism, and belongs to the technical field of machinery. The centrifugal pump comprises a pump body and a barrel body arranged outside the pump body, wherein a rotor is horizontally arranged in the pump body, a rotor supporting end penetrates through the pump body and is positioned in the barrel body, the barrel body is connected with the rotor through a bearing, one end, close to the pump body, of the barrel body is sealed with the rotor through an oil seal, the other end of the barrel body is sealed, an oil filling hole vertically penetrates through the upper side of the barrel body, an oil pipe is vertically inserted into the upper end of the oil filling hole, the oil pipe is fixedly connected with the barrel body in a sealed mode, the upper end of the oil pipe extends out of the oil filling hole and extends into a cover body, an air passage is formed between the inner wall of the cover body and the oil pipe, one side of the outer wall of the upper end of the oil pipe is a first plane, a second. The invention has long service life.)

1. A high-efficiency centrifugal pump rotor supporting end installation mechanism comprises a pump body, a barrel body and a flushing pipe, wherein the barrel body and the flushing pipe are arranged outside the pump body, a rotor is horizontally arranged in the pump body, the rotor supporting end extends out of the pump body and is positioned in the barrel body, the barrel body and the rotor are connected through a bearing, the rotor supporting end is sealed with the pump body through a mechanical sealing element, one end of the flushing pipe is communicated with a pump cavity of the pump body, a flow channel for flushing the mechanical sealing element is arranged in the pump body, and the other end of the flushing pipe is communicated with the flow channel; the bearing is positioned in the closed cavity, an oil filling hole communicated with the closed cavity vertically penetrates through the upper side of the barrel body, the bearing is positioned between the oil filling hole and the pump body, an oil pipe is vertically inserted into the upper end of the oil filling hole, the oil pipe is fixedly connected with the barrel body in a sealing manner, an inner hole of the oil pipe is communicated with the lower end of the oil filling hole, the upper end of the oil pipe extends out of the oil filling hole and extends into the cover body, and an air passage for communicating the inner hole of the oil pipe with the; one side of the outer wall of the upper end of the oil pipe is a first plane, a second plane which is tightly contacted with the first plane is arranged on the inner wall of the cover body, a second hole horizontally penetrates through the second plane, a first hole which is coaxial with the second hole is formed in the first plane, the same pin shaft is clamped in the first hole and the second hole, and the outer end of the pin shaft extends out of the second hole; a groove is formed in the middle of the top wall of the cover body, an exhaust hole opposite to an inner hole of the oil pipe penetrates through the bottom wall of the groove, a semiconductor refrigeration piece and an annular sealing piece are fixed in the groove, the annular sealing piece and the exhaust hole are coaxial, the semiconductor refrigeration piece and the annular sealing piece are matched to seal an upper port of the exhaust hole, and the cold surface of the semiconductor refrigeration piece is opposite to the exhaust hole; the upper end of the pipe body is slidably inserted into the second pipe, and the outer wall of the pipe body and the inner wall of the second pipe form sealing through a sealing ring.

2. The mounting mechanism for the rotor supporting end of the high-efficiency centrifugal pump as claimed in claim 1, wherein the inner hole of the oil pipe is composed of a first taper hole, a second taper hole, a third taper hole and a straight hole which are sequentially arranged from top to bottom and are sequentially communicated, the diameters of the first taper hole, the second taper hole and the third taper hole are all gradually reduced downwards, the straight hole is communicated with the lower end of the oil injection hole, and the taper hole is connected with an air channel.

3. The mounting mechanism for the supporting end of the rotor of the high-efficiency centrifugal pump as claimed in claim 2, wherein the inner wall of the casing is integrally formed with a guide ring, the guide ring and the oil pipe are coaxially arranged, the lower end of the guide ring extends to the second tapered hole, the outer side wall of the guide ring is a conical surface, the conical surface is parallel to the inner wall of the second tapered hole, an annular exhaust passage is formed between the conical surface and the inner wall of the second tapered hole, and the inner hole of the guide ring is the exhaust hole.

4. The mounting mechanism for the rotor supporting end of the high-efficiency centrifugal pump as claimed in claim 1, wherein an annular groove is formed in the outer side wall of the lower end of the oil pipe, an o-shaped ring is arranged in the annular groove, and the outer peripheral surface of the o-shaped ring abuts against the wall of the oil filling hole.

5. The high-efficiency centrifugal pump rotor supporting end mounting mechanism as claimed in claim 1, wherein the axial cross section of the annular sealing member is L-shaped, the annular sealing member is composed of a vertically arranged annular side wall and a horizontally arranged annular bottom wall, the annular side wall and the annular bottom wall are tightly pressed on the inner wall of the groove to form a seal, the shape and the size of the semiconductor refrigeration piece are matched with those of the annular sealing member, and the semiconductor refrigeration piece is inserted into the annular sealing member and tightly pressed on the annular bottom wall.

6. The high efficiency centrifugal pump rotor supporting end mounting mechanism of claim 5 wherein said tube is fixedly attached to said cover by welding and said tube and cover are sealed by an annular gasket.

7. The high efficiency centrifugal pump rotor supporting end mounting mechanism of claim 1 wherein said exhaust holes are tapered and the diameter of the exhaust holes increases downwardly.

Technical Field

The invention belongs to the technical field of machinery, relates to a centrifugal pump, and particularly relates to an efficient centrifugal pump rotor supporting end mounting mechanism.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller.

The existing centrifugal pump is a horizontal multistage centrifugal pump as disclosed in chinese patent library [ application number: 201510865619.3, comprising an elastic coupling, a rotor connected with the elastic coupling, a rolling bearing coaxial with the rotor, and a pump body connected with the rolling bearing, wherein the pump body comprises a suction section, a guide vane connected with the suction section, a plurality of middle sections connected with the guide vane, a final guide vane connected with the middle sections, a spitting section connected with the final guide vane, a water seal pipe and a balance water return pipe, and a sealing ring is arranged between the suction section and the guide vane.

In above-mentioned centrifugal pump, the rotor both ends are drive end and support end respectively, and these both ends all support through the bearing, and when the rotor was rotatory at a high speed, the rotor all can produce wearing and tearing and a large amount of heat with bearing contact department and bearing self, so not only seriously influence the life-span of bearing, under long-term the use moreover, the rotation precision of rotor also can reduce gradually.

Disclosure of Invention

The invention aims to provide a long-service-life efficient centrifugal pump rotor supporting end mounting mechanism aiming at the problems in the prior art.

The purpose of the invention can be realized by the following technical scheme: a high-efficiency centrifugal pump rotor supporting end installation mechanism comprises a pump body, a barrel body and a flushing pipe, wherein the barrel body and the flushing pipe are arranged outside the pump body, a rotor is horizontally arranged in the pump body, the rotor supporting end extends out of the pump body and is positioned in the barrel body, the barrel body and the rotor are connected through a bearing, the rotor supporting end is sealed with the pump body through a mechanical sealing element, one end of the flushing pipe is communicated with a pump cavity of the pump body, a flow channel for flushing the mechanical sealing element is arranged in the pump body, and the other end of the flushing pipe is communicated with the flow channel; the bearing is positioned in the closed cavity, an oil filling hole communicated with the closed cavity vertically penetrates through the upper side of the barrel body, the bearing is positioned between the oil filling hole and the pump body, an oil pipe is vertically inserted into the upper end of the oil filling hole, the oil pipe is fixedly connected with the barrel body in a sealing manner, an inner hole of the oil pipe is communicated with the lower end of the oil filling hole, the upper end of the oil pipe extends out of the oil filling hole and extends into the cover body, and an air passage for communicating the inner hole of the oil pipe with the; one side of the outer wall of the upper end of the oil pipe is a first plane, a second plane which is tightly contacted with the first plane is arranged on the inner wall of the cover body, a second hole horizontally penetrates through the second plane, a first hole which is coaxial with the second hole is formed in the first plane, the same pin shaft is clamped in the first hole and the second hole, and the outer end of the pin shaft extends out of the second hole; a groove is formed in the middle of the top wall of the cover body, an exhaust hole opposite to an inner hole of the oil pipe penetrates through the bottom wall of the groove, a semiconductor refrigeration piece and an annular sealing piece are fixed in the groove, the annular sealing piece and the exhaust hole are coaxial, the semiconductor refrigeration piece and the annular sealing piece are matched to seal an upper port of the exhaust hole, and the cold surface of the semiconductor refrigeration piece is opposite to the exhaust hole; the upper end of the pipe body is slidably inserted into the second pipe, and the outer wall of the pipe body and the inner wall of the second pipe form sealing through a sealing ring.

In an initial state, the cover moving above the pin shaft is pulled out to generate a certain gap between the cover moving above the pin shaft and the oil pipe, and then lubricating grease is injected into the closed cavity through the upper port of the oil pipe to lubricate the bearing and the contact part of the bearing and the rotor, so that the abrasion speed can be delayed, the service life is prolonged, the stable operation of the rotor is ensured, and the working stability is improved; when the semiconductor refrigerating sheet runs, water in the pump cavity can enter the pipe body through the pipe fitting so as to take away high temperature on the hot surface of the semiconductor refrigerating sheet.

A channel for communicating the inner hole of the oil pipe with the outside is formed between the cover body and the oil pipe, and the inner hole of the oil filling hole is communicated with the closed cavity, so that heat in the closed cavity can be quickly discharged, the heat dissipation efficiency in the closed cavity is improved, the aging speed of lubricating grease is prolonged, the lubricating effect is fully exerted, and the service life of the structure is prolonged; secondly, under pipe fitting, body and flushing pipe cooperation, make the cold water of pump intracavity can contact with the hot face of semiconductor refrigeration piece to further reduce the temperature in the closed chamber through the cold face of the semiconductor refrigeration piece with exhaust hole contact, thereby further improve closed chamber radiating efficiency, in order to further prolong this structural life.

In the installation mechanism for the rotor supporting end of the efficient centrifugal pump, the inner hole of the oil pipe consists of a first taper hole, a second taper hole, a third taper hole and a straight hole which are sequentially arranged from top to bottom and are sequentially communicated, the aperture of the first taper hole, the aperture of the second taper hole and the aperture of the third taper hole are all gradually reduced downwards, the straight hole is communicated with the lower end of the oil injection hole, and the taper hole is connected with an air channel. The multi-section taper hole is designed, so that the exhaust and oil filling are facilitated.

In the installation mechanism for the rotor supporting end of the high-efficiency centrifugal pump, the guide ring is integrally formed on the inner wall of the cover body, the guide ring and the oil pipe are coaxially arranged, the lower end of the guide ring extends to the second taper hole, the outer side wall of the guide ring is a conical surface, the conical surface is parallel to the inner wall of the second taper hole, an annular exhaust channel is formed between the conical surface and the inner wall of the second taper hole, and the inner hole of the guide ring is the exhaust hole. The exhaust channel is arranged to play a role in guiding, so that heat can be smoothly discharged into the first taper hole, and the first taper hole is quickly discharged into the air passage and discharged under the guiding effect of the first taper hole, so that the heat dissipation efficiency of the closed cavity is further enhanced, and the service life of the structure is prolonged.

In the mounting mechanism for the rotor supporting end of the high-efficiency centrifugal pump, the outer side wall of the lower end of the oil pipe is provided with the annular groove, the annular groove is internally provided with the o-shaped ring, and the outer peripheral surface of the o-shaped ring is abutted against the hole wall of the oil filling hole, so that reliable sealing is formed between the oil pipe and the barrel body, and the working stability is improved.

In the installation mechanism for the rotor supporting end of the high-efficiency centrifugal pump, the axial section of the annular sealing piece is L-shaped, the annular sealing piece is composed of an annular side wall which is vertically arranged and an annular bottom wall which is horizontally arranged, the annular side wall and the annular bottom wall are tightly pressed on the inner wall of the groove to form sealing, the shape and the size of the semiconductor refrigerating piece are matched with those of the annular sealing piece, and the semiconductor refrigerating piece is inserted and embedded in the annular sealing piece and tightly pressed on the annular bottom wall. By adopting the design, the effect of sealing the upper port of the exhaust hole can be effectively enhanced, and the working stability is improved.

In the installation mechanism for the rotor supporting end of the efficient centrifugal pump, the pipe body is fixedly connected with the cover body in a welding mode, and the pipe body and the cover body are sealed through an annular sealing gasket.

In the installation mechanism for the rotor supporting end of the high-efficiency centrifugal pump, the exhaust holes are conical, and the diameters of the exhaust holes are gradually increased downwards.

Compared with the prior art, this high-efficient centrifugal pump rotor supports end installation mechanism has following advantage:

1. form the passageway that makes oil pipe hole and external intercommunication between the cover body and the oil pipe, and the oil pipe hole communicates the closed chamber again, can discharge the heat of closed intracavity fast like this to improve the radiating efficiency who seals the intracavity, prolong lubricating grease ageing speed, the lubricated effect of full play, thereby prolong this structural life.

2. Under pipe fitting, body and flushing pipe cooperation, make the cold water of pump intracavity can contact with the hot face of semiconductor refrigeration piece to further reduce the temperature of sealing the intracavity through the cold face of the semiconductor refrigeration piece with the exhaust hole contact, thereby further improve and seal the chamber radiating efficiency, in order to further prolong this structural life.

3. The exhaust channel is arranged to play a role in guiding, so that heat can be smoothly discharged into the first taper hole, and the first taper hole is quickly discharged into the air passage and discharged under the guiding effect of the first taper hole, so that the heat dissipation efficiency of the closed cavity is further enhanced, and the service life of the structure is prolonged.

Drawings

Fig. 1 is a schematic view of the structure of a centrifugal pump.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic structural diagram of the position of the cover body, the oil pipe, the pipe body and the pipe fitting.

In the figure, 1, a pump body; 1a, a flow channel; 2. a barrel body; 2a, an oil filling hole; 3. a flush tube; 3a, a pipe fitting; 4. a bearing; 5. a mechanical seal; 6. oil sealing; 7. an oil pipe; 7a, a first plane; 7b, a first taper hole; 7c, a second taper hole; 7d, a taper hole III; 7f, straight holes; 8. an o-shaped ring; 9. a cover body; 9a, a second plane; 9b, a groove; 9c, an exhaust hole; 9d, a guide ring; 10. an airway; 11. a pin shaft; 12. a semiconductor refrigeration sheet; 13. an annular seal; 14. a pipe body; 15. a seal ring; 16. an annular seal; 17. and a rotor.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, in the installation mechanism of the rotor supporting end of the high-efficiency centrifugal pump, the centrifugal pump comprises a pump body 1, and a barrel body 2 and a flushing pipe 3 which are both arranged outside the pump body 1, a rotor 17 is horizontally arranged in the pump body 1, the supporting end of the rotor 17 penetrates through the pump body 1 and is positioned in the barrel body 2, and the barrel body 2 and the rotor 17 are connected through a bearing 4. In the present embodiment, the rolling bearing 4 is preferably used as the type of the bearing 4.

Wherein, the supporting end of the rotor 17 forms a seal with the pump body 1 through the mechanical sealing element 5, one end of the flushing pipe 3 is communicated with the pump cavity of the pump body 1, a flow channel 1a for flushing the mechanical sealing element 5 is arranged in the pump body 1, and the other end of the flushing pipe 3 is communicated with the flow channel 1 a. In this embodiment, the mechanical seal 5 and the connection of the flushing pipe 3 to the flow channel 1a and the pump chamber are conventional and will not be described in detail here.

As shown in fig. 1 and 2, one end of the barrel body 2 close to the pump body 1 is sealed with the rotor 17 through the oil seal 6, and the other end of the barrel body 2 is sealed, at this time, a closed cavity is formed among the barrel body 2, the rotor 17 and the oil seal 6, and the bearing 4 is located in the closed cavity. As shown in fig. 1, an oil filling hole 2a communicated with the closed cavity is vertically penetrated through the upper side of the barrel body 2, and the bearing 4 is positioned between the oil filling hole 2a and the pump body 1. An oil pipe 7 is vertically inserted into the upper end of the oil filling hole 2a, the oil pipe 7 is fixedly connected with the barrel body 2 in a sealing mode, and an inner hole of the oil pipe 7 is communicated with the lower end of the oil filling hole 2 a. In this embodiment, oil pipe 7 and staving 2 link firmly through the welding mode, have seted up the ring channel on the lower extreme lateral wall of oil pipe 7, are equipped with o shape circle 8 in the ring channel, and the outer peripheral face of o shape circle 8 offsets with the pore wall of oil filler point 2a, make to form reliable sealed between oil pipe 7 and the staving 2.

As shown in fig. 2 and 3, a cover 9 is arranged outside the barrel 2, and the cover 9 and the oil pipe 7 are coaxially arranged. The upper end of the oil pipe 7 extends out of the oil filling hole 2a and extends into the cover body 9, the inner diameter of the cover body 9 is larger than the outer diameter of the oil pipe 7, and an air passage 10 which enables an inner hole of the oil pipe 7 to be communicated with the outside is formed between the inner wall of the cover body 9 and the oil pipe 7. One side of the outer wall of the upper end of the oil pipe 7 is a first plane 7a, and a second plane 9a which is tightly contacted with the first plane 7a is arranged on the inner wall of the cover body 9 so as to limit the cover body 9 in the circumferential direction; a second hole horizontally penetrates through the second plane 9a, a first hole coaxial with the second hole is formed in the first plane 7a, and the same pin shaft 11 is clamped in the first hole and the second hole to limit the cover body 9 in the axial direction and the radial direction, so that the cover body 9 and the oil pipe 7 are stably connected. The outer end of the pin shaft 11 extends out of the hole II so as to be convenient for plugging and unplugging the pin shaft 11. Preferably, the first hole is a blind hole.

Further, a groove 9b is formed in the middle of the top wall of the cover body 9, and an exhaust hole 9c opposite to the inner hole of the oil pipe 7 is formed in the bottom wall of the groove 9b in a penetrating mode. A semiconductor refrigerating sheet 12 and an annular sealing piece 13 are fixed in the groove 9b, the annular sealing piece 13 is coaxial with the exhaust hole 9c, the semiconductor refrigerating sheet 12 is matched with the annular sealing piece 13 to seal an upper port of the exhaust hole 9c, and the cold surface of the semiconductor refrigerating sheet 12 is opposite to the exhaust hole 9 c. Specifically, the axial cross section of the annular sealing member 13 is L-shaped, the annular sealing member 13 is composed of a vertically arranged annular side wall and a horizontally arranged annular bottom wall, the annular side wall and the annular bottom wall are both pressed tightly on the inner wall of the groove 9b to form sealing, the shape and the size of the semiconductor refrigeration sheet 12 are both matched with the annular sealing member 13, and the semiconductor refrigeration sheet 12 is inserted into the annular sealing member 13 and pressed tightly on the annular bottom wall to effectively enhance the effect of sealing the upper port of the exhaust hole 9c, so as to improve the working stability. A tube body 14 is vertically arranged on the top wall of the cover body 9, the tube body 14 is fixedly connected with the cover body 9 in a sealing mode, the groove 9b is opposite to an inner hole of the tube body 14, and the hot surface of the semiconductor refrigeration piece 12 extends out of the annular sealing piece 13 and is located in the tube body 14. An L-shaped pipe fitting 3a is integrally formed on one side of the flushing pipe 3, the pipe fitting 3a is composed of a first pipe and a second pipe, the first pipe is horizontally arranged, the second pipe is vertically arranged, the first pipe is communicated with the flushing pipe 3, the upper end of the pipe body 14 is slidably inserted into the second pipe, and a seal ring 15 is formed between the outer wall of the pipe body 14 and the inner wall of the second pipe. In this embodiment, the tube 14 is fixedly connected to the cover 9 by welding, and a seal is formed between the tube 14 and the cover 9 by an annular sealing gasket 16.

As shown in fig. 3, the inner hole of the oil pipe 7 is composed of a first taper hole 7b, a second taper hole 7c, a third taper hole 7d and a straight hole 7f which are sequentially arranged from top to bottom and are sequentially communicated, the hole diameters of the first taper hole 7b, the second taper hole 7c and the third taper hole 7d are gradually reduced downwards, the straight hole 7f is communicated with the lower end of the oil injection hole 2a, and the first taper hole 7b is communicated with the air passage 10. The multi-section taper hole is designed, so that the exhaust and oil filling are facilitated. Further, a guide ring 9d is integrally formed on the inner wall of the cover body 9, the guide ring 9d and the oil pipe 7 are coaxially arranged, the lower end of the guide ring 9d extends to the second taper hole 7c, the outer side wall of the guide ring 9d is a conical surface, the conical surface is parallel to the inner wall of the second taper hole 7c, and an annular exhaust passage is formed between the conical surface and the inner wall of the second taper hole 7 c. The inner hole of the guide ring 9d is the above-mentioned exhaust hole 9c, the exhaust hole 9c is conical, and the diameter of the exhaust hole 9c gradually increases downwards. The exhaust channel is arranged to play a role in guiding, so that heat can be smoothly discharged into the first taper hole 7b, and is rapidly discharged into the air passage 10 and discharged under the guiding effect of the first taper hole 7b, the heat dissipation efficiency of the closed cavity is further enhanced, and the service life of the structure is prolonged.

During actual assembly, the power line of the semiconductor refrigeration piece 12 sequentially passes through the exhaust hole 9c, the inner hole of the oil pipe 7 and the air passage 10 and extends out of the cover body 9. In an initial state, the pin shaft 11 is pulled out to move the cover body 9 upwards to form a certain gap with the oil pipe 7, and then lubricating grease is injected into the closed cavity through the upper port of the oil pipe 7 to lubricate the bearing 4 and the contact part of the bearing 4 and the rotor 17, so that the abrasion speed can be delayed, the service life is prolonged, the rotor 17 is ensured to stably run, and the working stability is improved; in operation, water in the pump chamber enters the tube 14 through the tube 3a to carry away the high temperature on the hot side of the semiconductor cooling fins 12.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.