CN111120389A

CN111120389A - Self-circulation thin oil lubricating bearing body of vertical pump

Info

Publication number: CN111120389A
Application number: CN201911394235.2A
Authority: CN
Inventors: 张高正; 胡钟兵; 王金法; 王亮亮; 李迎春; 程建强; 张世存; 许文静; 刘慧娟; 刘金龙
Original assignee: XI'AN AEROSPACE PUMPS CO Ltd
Current assignee: XI'AN AEROSPACE PUMPS CO Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-08

Abstract

The invention relates to a self-circulation thin oil lubricating bearing body of a vertical pump, which improves the lubricating effect of a bearing in the bearing body of the vertical pump, and improves the load bearing capacity and the capacity of adapting to conveying high-temperature media. The bearing body comprises a shell, an upper gland, a lower gland, a bearing and a bearing sleeve; a bearing sleeve is fixedly arranged between the bearing and a rotating shaft of the vertical pump; the part of the upper part of the bearing sleeve higher than the bearing is provided with at least one oil outlet along the radial direction; the lower part of the bearing sleeve is a thin-wall cylinder, and the lower end of the thin-wall cylinder converges towards the direction close to the rotating shaft, so that an oil inlet is formed; lubricating oil channels are arranged in the outer wall of the middle part of the bearing sleeve along the axial direction, and the number of the lubricating oil channels is matched with that of the oil outlets; the oil inlet is communicated with the oil outlet through a lubricating oil channel, cooling lubricating oil injected into the shell enters from the oil inlet, flows out of the oil outlet under the guiding action of centrifugal force generated by rotation and the convergent oil inlet, and therefore sufficient cooling and lubricating of the bearing are achieved.

Description

Self-circulation thin oil lubricating bearing body of vertical pump

Technical Field

The invention relates to a bearing body of a vertical pump, in particular to a self-circulation thin oil lubricating bearing body of the vertical pump.

Background

At present, the well-known thin oil lubrication bearing body of a vertical pump mostly adopts the structure of an oil thrower, a water cooling jacket is arranged outside the oil thrower, the lubricating oil of the bearing mainly depends on the lubricating oil splashed by the oil thrower to lubricate the bearing when a rotating shaft of the vertical pump rotates, the lubricating oil can meet the requirements of a light-load single-row bearing and a pump for conveying a normal-temperature medium, the requirements of the pump for impact and large load are difficult to meet, a double-row or three-row angular contact ball bearing is generally adopted when heavy load is carried, the upper bearing can not be sufficiently lubricated and cooled only by the oil splashed by the oil thrower, the upper bearing does not have the lubricating and cooling effect in an engineering case, the bearing temperature is higher, when the pump conveys the high-temperature medium, the upper bearing is burnt, the service life of the bearing is greatly reduced, and the reliability and the.

Disclosure of Invention

The vertical pump aims to solve the problem that a bearing in a bearing body of the existing vertical pump is poor in cooling and lubricating effects, so that the bearing is prone to failure, and the load bearing capacity of the vertical pump and the capacity of the vertical pump in the process of being suitable for conveying high-temperature media are affected. The invention provides a self-circulation thin oil lubricating bearing body of a vertical pump.

The basic design idea of the invention is as follows:

through reasonable design and layout, 3 channels are designed in the bearing sleeve, and 2 oil return grooves are machined in the position of the bearing outer ring mounted on the inner wall of the shell. The design has 55 inclined oil lifting plate at the bearing housing lower extreme, the pump is when moving, lubricating oil relies on the ascending component of centrifugal force of oil lifting plate to carry oil to bearing body upper portion, send the top of bearing box with oil through the hole on the bearing bush for lubricated bearing, later oil flows to the oil bath through the oil return tank of bearing body or bearing ball clearance under the action of gravity, play the effect of lubricated cooling bearing, broken through the structure that the bearing body utilized the oil dish that splashes in the past, the drawback that the upper end bearing can not obtain sufficient lubrication and cooling has been improved.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention provides a self-circulation thin oil lubricating bearing body of a vertical pump, which comprises a shell, an upper gland, a lower gland and a bearing, wherein the shell is provided with a plurality of grooves; the improvement is as follows: a bearing sleeve is fixedly arranged between the bearing and a rotating shaft of the vertical pump;

the part of the upper part of the bearing sleeve higher than the bearing is provided with at least one oil outlet along the radial direction;

the lower part of the bearing sleeve is a thin-wall cylinder, and the lower end of the thin-wall cylinder converges towards the direction close to the rotating shaft, so that an oil inlet is formed;

lubricating oil channels are arranged in the outer wall of the middle part of the bearing sleeve along the axial direction, and the number of the lubricating oil channels is matched with that of the oil outlets;

the oil inlet is communicated with the oil outlet through a lubricating oil channel, cooling lubricating oil injected into the shell enters from the oil inlet and flows out of the oil outlet under the guiding action of centrifugal force generated by rotation and the convergent oil inlet, and therefore sufficient cooling and lubricating of the bearing are achieved.

Furthermore, in order to prevent the problems of failure of the framework type seal caused by high-speed rotation or abrasion after rotation and the like when the lower end cover and a rotating shaft of the vertical pump adopt the framework type seal, a sleeve is also designed on the bearing body provided by the invention; the sleeve is sleeved on a rotating shaft of the vertical pump, the sleeve and the rotating shaft of the vertical pump are in clearance fit, the lower end of the sleeve is welded with the lower gland, and the upper end of the sleeve extends into a position between the inner wall of the bearing sleeve and the outer wall of the rotating shaft of the vertical pump; a gap is reserved between the part of the upper end of the sleeve extending into the space between the inner wall of the bearing sleeve and the outer wall of the rotating shaft of the vertical pump and the inner wall of the bearing sleeve.

Further, in order to enable cooling lubricating oil to flow into the oil inlet more smoothly, the outer wall of the sleeve between the oil inlet and the lower pressing cover is reduced in sequence according to the flowing direction of the cooling lubricating oil.

Furthermore, in order to adapt to the working condition that the medium conveyed by the pump is very high, the cooling of the cooling lubricating oil is required, so that the use requirement is ensured, and a water cooling assembly is further designed on the bearing body provided by the invention; the water cooling assembly comprises a cooling liquid inlet joint, a cooling liquid outlet joint and a cooling water pipe; the cooling liquid inlet joint and the cooling liquid outlet joint are both arranged on the lower pressing cover, the cooling water pipe is arranged on the outer wall of the thin-wall cylinder in a winding mode, one end of the cooling water pipe is communicated with the cooling liquid inlet joint, and the other end of the cooling water pipe is communicated with the cooling liquid outlet joint.

Further, the degree of convergence of the lower end of the thin-walled cylinder is proportional to the size of the bearing, i.e.: the larger the bearing, the greater the convergence of the lower end of the thin-walled cylinder.

Further, the convergence angle of the lower end of the thin-walled cylinder was 55 °.

Furthermore, an oil cup mounting interface is arranged on the shell.

Furthermore, an oil pointer installation interface is arranged on the shell.

Furthermore, at least one oil return groove is formed in the position, corresponding to the position where the bearing is installed, of the inner wall of the shell along the circumferential direction.

Further, the bearing is a single-row angular contact ball bearing or a double-row angular contact ball bearing or a three-row angular contact ball bearing.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention utilizes the thin-wall cylinder body arranged at the lower end of the bearing sleeve, the lower end of the thin-wall cylinder body is provided with the oil inlet which is converged towards the direction of the rotating shaft, cooling lubricating oil injected into the shell enters from the oil inlet, is lifted upwards along the lubricating oil channel under the centrifugal force generated by rotation and the guiding action generated by the converged oil inlet, and then flows out from the oil outlet to fully cool and lubricate the bearing.

2. The invention also utilizes the sleeve to replace the prior skeleton type sealing ring, the sleeve is sleeved on the rotating shaft of the vertical pump and is in clearance fit with the rotating shaft, the lower end of the sleeve is welded with the lower gland, the rotating shaft rotating at high speed is not contacted with the sleeve due to the structural design, the abrasion of the rotating shaft is avoided, and the upper end of the sleeve extends into the space between the inner wall of the bearing sleeve and the outer wall of the rotating shaft of the vertical pump; the design has played sealed effect, and cooling lubricating oil flows into in the lubricating oil passageway along the inner wall of thin-walled cylinder all the time under the effect of centrifugal force, can not get into the sleeve pipe upper end and the clearance between the bearing housing inner wall.

In addition, the outer diameter of the pipe section of the sleeve pipe between the oil inlet and the lower pressing cover is gradually reduced from bottom to top, so that cooling lubricating oil can flow into the oil inlet more smoothly.

3. In order to meet the requirement of a high-temperature medium conveyed by the pump, the invention designs the water cooling assembly to actively cool the cooling lubricating liquid, so that the temperature of the cooling lubricating liquid is prevented from exceeding a set value, and the cooling effect on the bearing is further ensured.

Drawings

Fig. 1 is a structural view of a bearing body in which a fuel gauge and an oil cup are mounted.

Fig. 2 is a structural view of the bearing housing.

The reference numbers are as follows:

1. the device comprises a shell, 2, an upper gland, 3-a bearing sleeve, 4, an adjusting nut, 5, a lubricating oil channel, 6-a round nut, 7-an oil cup installation interface, 8-a lower gland, 9, a cooling water pipe, 10, an oil return groove, 11-a bearing, 12-an oil pointer, 13-an oil cup, 14-an oil outlet, 15-a thin-wall cylinder, 16-an oil inlet, 17-a sleeve, 18-a rotating shaft of a vertical pump, 19-a cooling liquid inlet joint, 20-a cooling liquid outlet joint and 21-an oil pointer installation interface.

Detailed Description

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

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The present embodiment provides a specific structure of a self-circulation thin oil lubrication bearing body of a vertical pump, as shown in fig. 1, including a housing 1, an upper gland 2, a lower gland 8, a bearing 11, and a bearing housing 3 (in the present embodiment, the bearing 11 is a double-row angular contact ball bearing); the upper part of the shell 1 is provided with an upper gland 2, and the lower part of the shell is provided with a lower gland 8; the outer ring of the double-row angular contact ball bearing is matched with the inner wall of the shell 1, and the inner ring of the double-row angular contact ball bearing is fixedly connected with the rotating shaft 18 of the vertical pump through the bearing sleeve 3 (in the embodiment, the bearing sleeve 3 and the rotating shaft 18 of the vertical pump are fixed in a key connection mode);

the outer ring of the double-row angular contact ball bearing is axially positioned through the upper gland 2 and the shell 1, and the inner ring of the double-row angular contact ball bearing is axially positioned through the adjusting nut 4 and the round nut 6 which are arranged on the bearing sleeve 3 (of course, the double-row angular contact ball bearing has more axial positioning modes, and only one of the double-row angular contact ball bearing is provided in the embodiment, and the axial positioning modes of other modes can be adopted).

At least one oil outlet 14 is arranged on the upper part of the bearing sleeve 3 higher than the double-row angular contact ball bearing along the radial direction; the lower part of the bearing sleeve 3 is a thin-wall cylinder body 15, and the lower end of the thin-wall cylinder body 15 converges towards the direction close to a rotating shaft 18 of the vertical pump, so that an oil inlet 16 is formed; lubricating oil channels 5 are arranged in the outer wall of the middle part of the bearing sleeve 3 along the axial direction, and the number of the lubricating oil channels 5 is matched with that of the oil outlets 14 (namely the matching means that the number of the oil outlets 14 is the same as that of the lubricating oil channels 5 and the lubricating oil channels are in one-to-one correspondence); in the present embodiment, the number of the oil inlets 14 and the number of the lubricating oil channels 5 are 3. It is also emphasized here that: the convergence degree of the lower end of the thin-wall cylinder 15 is in direct proportion to the size of the bearing 11, that is, as the size of the bearing 11 increases, the convergence degree of the lower end of the thin-wall cylinder 15 increases, and the effect of lifting the cooling lubricant oil inlet 16 to the oil outlet 14 is better, in this embodiment, the convergence angle of the lower end of the thin-wall cylinder 15 is 55 °.

The cooling oil that pours into the casing gets into from oil inlet 16, under the centrifugal force that the rotation produced and the guide effect that is the oil inlet 16 production of convergence form, upwards promote along lubricating oil passageway 5, later flow out from oil-out 14, thereby realize the abundant cooling lubrication to double row angular contact ball bearing, for the convenience of cooling oil backward flow smoothly, at least one oil gallery 10 (this implementation has seted up 2 oil galleries) has been seted up along the circumferencial direction in the position that the casing 1 inner wall corresponds bearing 11 installation, cooling oil flows back downwards through double row angular contact ball bearing roller clearance and oil gallery 10 under the action of gravity.

On the basis of the cooling and lubricating structure, the embodiment also makes the following optimized design for the bearing body:

1. the bearing body adopts the sleeve 17 to replace the existing skeleton type sealing ring, the sleeve 17 is sleeved on the rotating shaft 18 of the vertical pump and is in clearance fit with the rotating shaft, the lower end of the sleeve 17 is welded with the lower pressing cover 8, the leakage of cooling lubricating oil from a gap between the lower pressing cover 8 and the rotating shaft 18 of the vertical pump is avoided, the rotating shaft 18 of the vertical pump rotating at high speed is not contacted with the sleeve 17 due to the structural design, the abrasion of the rotating shaft is avoided, and meanwhile, the upper end of the sleeve 17 extends into the space between the inner wall of the bearing sleeve 3 and the outer wall of the rotating shaft 18 of the vertical pump; the part that the sleeve pipe 17 upper end stretched into between the rotating shaft 18 outer wall of bearing housing inner wall and vertical pump with there is the clearance bearing housing 3 inner wall, and sealed effect has been played in this design, in cooling lubricating oil flowed into the lubricating oil passageway along the inner wall of thin-walled cylinder all the time under the effect of centrifugal force, can not get into the sleeve pipe upper end with clearance between the bearing housing inner wall has avoided cooling lubricating oil from the top seepage.

2. The sleeve 17 is located in the pipe section between the oil inlet 16 and the lower gland 8, and the outer diameter of the sleeve is gradually reduced from bottom to top, so that cooling lubricating oil can flow into the oil inlet more smoothly, and the effect of lifting the cooling lubricating oil upwards along a lubricating oil channel is further ensured.

3. In order to meet the requirement of high-temperature media conveyed by a pump, the invention designs the water cooling assembly, wherein the water cooling assembly comprises a cooling liquid inlet joint 19, a cooling liquid outlet joint 20 and a cooling water pipe 9; coolant liquid inlet joint 19 and coolant liquid outlet joint 20 all install on gland 8 down, and condenser tube 9 coils the setting and is in on the outer wall of thin wall barrel 15, condenser tube 9 one end with coolant liquid inlet joint 19 intercommunication, the condenser tube other end with coolant liquid outlet joint 20 intercommunication, when the high temperature need cool down, lets in the coolant liquid in to this water-cooling component to realized the initiative cooling to the lubricated liquid of cooling in the casing, avoided the cooling oil temperature to exceed the setting value, further ensured the cooling effect to the bearing.

4. When the bearing body is used for a long time, cooling lubricating oil leaks more or less, and the cooling lubricating oil can be directly added inwards by the oil cup 13 in the using process of the bearing body by arranging the oil cup mounting interface 7 on the shell 1.

5. For convenience of observation, whether the oil level of the cooling lubricating oil in the shell meets the use requirement or not is judged, an oil pointer installation interface 21 is arranged on the shell 1, and the height of the oil level in the shell can be known through inserting an oil pointer 12.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-circulation thin oil lubrication bearing body of a vertical pump comprises a shell (1), an upper gland (2), a lower gland (8) and a bearing (11); the method is characterized in that:

a bearing sleeve (3) is fixedly arranged between the bearing (11) and a rotating shaft (18) of the vertical pump;

the part of the upper part of the bearing sleeve (3) higher than the bearing (11) is provided with at least one oil outlet (14) along the radial direction;

the lower part of the bearing sleeve (3) is a thin-wall cylinder (15), and the lower end of the thin-wall cylinder (15) converges towards the direction close to a rotating shaft (18) of the vertical pump, so that an oil inlet (16) is formed;

lubricating oil channels (5) are arranged in the outer wall of the middle part of the bearing sleeve (3) along the axial direction, and the number of the lubricating oil channels (5) is matched with that of the oil outlets (14); the oil inlet (16) is communicated with the oil outlet (14) through a lubricating oil channel (5).

2. The vertical pump self-circulating thin oil lubricated bearing body of claim 1, wherein: also comprises a sleeve (17); the sleeve (17) is sleeved on the rotating shaft (18) of the vertical pump, the sleeve (17) is in clearance fit with the rotating shaft (18) of the vertical pump, the lower end of the sleeve (17) is fixedly connected with the lower gland (8), and the upper end of the sleeve (17) extends into a space between the inner wall of the bearing sleeve (3) and the outer wall of the rotating shaft (18) of the vertical pump; a gap is reserved between the part of the upper end of the sleeve (17) extending into the space between the inner wall of the bearing sleeve (3) and the outer wall of the rotating shaft (18) of the vertical pump and the inner wall of the bearing sleeve (3).

3. The vertical pump self-circulating thin oil lubricated bearing body of claim 2, wherein: the outer diameter of a sleeve (17) positioned between the oil inlet (14) and the lower gland (8) is reduced from bottom to top in sequence.

4. A vertical pump self-circulating thin oil lubricated bearing body according to claim 1, 2 or 3, wherein: the water cooling component is also included; the water cooling assembly comprises a cooling liquid inlet joint (19), a cooling liquid outlet joint (20) and a cooling water pipe (9); the cooling liquid inlet joint (19) and the cooling liquid outlet joint (20) are both installed on the lower gland (8), the cooling water pipe (9) is arranged on the outer wall of the thin-wall cylinder body (15) in a coiled mode, one end of the cooling water pipe (9) is communicated with the cooling liquid inlet joint (19), and the other end of the cooling water pipe (9) is communicated with the cooling liquid outlet joint (20).

5. The vertical pump self-circulating thin oil lubricated bearing body according to claim 4, wherein: the degree of convergence of the lower end of the thin-walled cylinder (15) is proportional to the size of the bearing (11).

6. The vertical pump self-circulating thin oil lubricated bearing body of claim 5, wherein: the convergence angle of the lower end of the thin-wall cylinder (15) is 55 degrees.

7. The vertical pump self-circulating thin oil lubricated bearing body of claim 6, wherein: an oil cup mounting interface (7) is arranged on the shell (1).

8. The vertical pump self-circulating thin oil lubricated bearing body of claim 7, wherein: and an oil pointer mounting interface (21) is arranged on the shell (1).

9. The vertical pump self-circulating thin oil lubricated bearing body of claim 8, wherein: at least one oil return groove (10) is formed in the position, corresponding to the position where the bearing (11) is installed, of the inner wall of the shell (1) along the circumferential direction.

10. The vertical pump self-circulating thin oil lubricated bearing body of claim 9, wherein: the bearing (11) is a single-row angular contact ball bearing or a double-row angular contact ball bearing or a three-row angular contact ball bearing.