阅读说明：本技术 卧式离心泵轴承润滑增压装置 (Bearing lubricating and pressurizing device for horizontal centrifugal pump ) 是由 徐梦甜 刘军 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种卧式离心泵轴承润滑增压装置,包括轴承箱体、轴承箱盖、滚子轴承、轴瓦、滑动轴承甩油环、锁紧螺帽、轴承防转套,其特征在于还包括甩油环约束套和固定环,所述轴承箱体内设有甩油环约束套,所述甩油环约束套的轴心与泵轴轴心不同心且位于泵轴轴心上方,甩油环约束套外端与轴承箱体连接,甩油环约束套内孔一端与固定环外周连接,另一端面两侧壁分别设有甩油环插孔,轴瓦内下壁与泵轴下壁相接触,上壁与泵轴间形成顶部间隙,两侧壁与泵轴间形成侧面间隙,以使泵轴在高速旋转过程中避免与轴瓦大面积接触而产生热量,本发明具有结构新颖、加工方便、泵轴变形小、运行稳定、无振动和噪声、使用寿命长、维修成本低、工作效率高等优点。(The invention discloses a bearing lubrication supercharging device of a horizontal centrifugal pump, which comprises a bearing box body, a bearing box cover, a roller bearing, a bearing bush, a sliding bearing oil slinger, a lock nut and a bearing anti-rotation sleeve, and is characterized by also comprising an oil slinger restraining sleeve and a fixing ring, wherein the bearing box body is internally provided with the oil slinger restraining sleeve, the axis of the oil slinger restraining sleeve is not concentric with the axis of a pump shaft and is positioned above the axis of the pump shaft, the outer end of the oil slinger restraining sleeve is connected with the bearing box body, one end of the inner hole of the oil slinger restraining sleeve is connected with the periphery of the fixing ring, two side walls on the other end surface are respectively provided with an oil slinger inserting hole, the inner lower wall of the bearing bush is contacted with the lower wall of the pump shaft, a top gap is formed between the upper wall and the pump shaft, and a side, The pump shaft has the advantages of small deformation, stable operation, no vibration and noise, long service life, low maintenance cost, high working efficiency and the like.)

1. A bearing lubrication supercharging device of a horizontal centrifugal pump comprises a bearing box body, a bearing box cover, a roller bearing, a bearing bush, a sliding bearing oil slinger, a lock nut and a bearing anti-rotation sleeve, and is characterized by further comprising an oil slinger restraining sleeve and a fixing ring, wherein the oil slinger restraining sleeve is arranged in the bearing box body, the axis of the oil slinger restraining sleeve is not concentric with the axis of a pump shaft and is positioned above the axis of the pump shaft, the outer end of the oil slinger restraining sleeve is fixedly connected with the bearing box body, one end of the inner hole of the oil slinger restraining sleeve is fixedly connected with the periphery of the fixing ring, oil slinger insertion holes are respectively formed in two side walls of the other end face,

the bearing bush is sleeved on the pump shaft, the inner lower wall of the bearing bush is contacted with the lower wall of the pump shaft, a top gap is formed between the upper wall and the pump shaft, a side gap is formed between the two side walls and the pump shaft, so that the pump shaft is prevented from being contacted with the bearing bush in a large area in a high-speed rotation process to generate heat, a fixing flange is fixedly arranged on the periphery of the bearing bush, an oil slinger moving space is formed between the upper wall of the bearing bush and an oil slinger restraining sleeve, a semi-annular through groove is arranged in the middle of the upper half wall of the bearing bush and is arranged along the circumferential direction, the periphery of one end of the bearing bush is inserted into the fixing,

the oil slinger penetrates through oil slinger movable insertion holes on two sides of the oil slinger restraining sleeve, the upper portion of the oil slinger penetrates through the semi-annular through groove of the bearing bush and falls on the pump shaft through self weight, and the lower portion of the oil slinger is located on the lower portion of the oil slinger restraining sleeve and is in contact with lubricating oil in the bearing box body.

2. The bearing lubrication and pressurization device of a horizontal centrifugal pump according to claim 1, wherein one side wall of the bearing shell is provided with an oil inlet hole, the other side wall of the bearing shell is provided with an oil outlet hole, and the oil inlet hole and the oil outlet hole respectively correspond to the side clearances.

3. The bearing lubrication and pressurization device of the horizontal centrifugal pump according to claim 1 or 2, wherein oil grooves are arranged on the inner wall of the bearing bush at intervals, and the oil grooves are arranged along the axial direction.

4. The bearing lubrication and pressurization device of a horizontal centrifugal pump according to claim 3, wherein two ends of the inner wall of the bearing bush are respectively provided with an oil baffle wall, the inner diameter of the oil baffle wall is smaller than the inner diameter of the bearing bush, the bearing bush is in contact with the pump shaft through the oil baffle wall, the inner wall of the oil baffle wall is axially provided with an oil outlet groove, the oil outlet groove is communicated with the oil groove, and the width of the oil outlet groove is smaller than the width of the oil groove.

5. The bearing lubrication and pressurization device of the horizontal centrifugal pump according to claim 1 or 4, wherein the oil slinger restraining upper wall and the oil slinger restraining lower wall are respectively provided with an oil outlet.

6. The bearing lubrication and pressurization device of the horizontal centrifugal pump according to claim 5, wherein the left end of the oil slinger restraint sleeve is abutted with the outer ring of the roller bearing.

7. The bearing lubrication and pressurization device of the horizontal centrifugal pump according to claim 1, 2, 4 or 6, characterized in that the lock nut is sleeved with a roller bearing oil slinger, the lower part of the roller bearing oil slinger is contacted with lubricating oil, and the outer wall of the lock nut is gradually transited from a large diameter at two ends to a small diameter in the middle.

Technical Field

The invention relates to the field of fluid machinery, in particular to a bearing lubricating and pressurizing device of a horizontal centrifugal pump.

Background

At present, the existing centrifugal pump mainly comprises a pump body, a driving end bearing part, a mechanical sealing body, a rotor part, a non-driving end bearing part, a pump shaft and a driving part, wherein a stator part in the pump body mainly comprises the driving end bearing part, the non-driving end bearing part, a suction section, a middle section and a discharge section, the middle section is formed by axially connecting unit middle sections in series along the pump shaft, and rabbets of all parts are matched and rigidly connected; the rotor component in the pump body is fixed on the pump shaft by a bearing, an impeller, a pump shaft and a balance disc, the non-driving end bearing component comprises a bearing box, a bearing box cover, a roller bearing, an oil slinger, a sliding bearing, a lock nut and a bearing anti-rotation sleeve, the end part of the bearing box is fixedly connected with the bearing box cover in a sealing way, the sliding bearing, the oil slinger, the bearing anti-rotation sleeve and the lock nut are sequentially arranged on the pump shaft in the bearing box, lubricating oil is arranged in the bearing box, the bottom of the bearing box is provided with an oil outlet, a valve plug is arranged on the oil outlet, the bearing anti-rotation sleeve is fixedly sleeved with the rolling bearing, the outer wall of the rolling bearing is fixedly connected with the bearing box, when the centrifugal pump works, the rotating pump shaft drives the oil slinger to rotate and bring the lubricating oil to the upper part of, avoid the dry grinding and burning caused by the dry contact between the pump shaft and the bearing bush. But the following defects exist in the using process: one, because slide bearing is higher as the concentricity, size precision, the assembly precision requirement of stationary part for the pump shaft rotating member, use and carry out the overhaul after the centrifugal pump passes through a period of time, reuse, just hardly guarantee the precision requirement, this just need be when the equipment through the pump shaft with join in marriage the high point of finding out the axle bush inner wall, reuse scraper scrapes, finally make axle bush hole and pump shaft concentric, consequently, cost of maintenance is high, work efficiency is low, the processing degree of difficulty is big, it is inconvenient to maintain.

Through the search, CN208793305 discloses a utility model patent of an oil slinger structure that can make oil smoothly pass through a shaft, and a sliding bearing of this structure, namely a bearing bush, is a halved structure, and this structure not only has the same substantive deficiency of the whole bearing bush, but also has the following two disadvantages: firstly, because the oil throwing damage is limited by a limiting channel of an inner cavity of a bearing bush, when the pump shaft rotates at a high speed, the oil throwing damage is easily limited by the limiting channel of the bearing bush to cause that the rotation is not flexible or the rotation cannot be performed, and further an oil throwing ring belt is not oiled, so that the pump shaft and the bearing bush are subjected to dry grinding and burnt;

secondly, because the clearance between axle bush and the pump shaft is very little, bring little lubricating oil into pump shaft and axle bush clearance through the oil slinger, the heat gives off slowly, leads to the high temperature of pump shaft during the operation, and then leads to the pump shaft to warp and produce vibration, big noise, and life is short.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides the bearing lubrication supercharging device of the horizontal centrifugal pump with the enhanced bearing bush, which has the advantages of novel structure, convenient processing, small pump shaft deformation, stable operation, no vibration and noise, long service life, low maintenance cost and high working efficiency.

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

a bearing lubrication supercharging device of a horizontal centrifugal pump comprises a bearing box body, a bearing box cover, a roller bearing, a bearing bush, a sliding bearing oil slinger, a lock nut and a bearing anti-rotation sleeve, and is characterized by further comprising an oil slinger restraining sleeve and a fixing ring, wherein the oil slinger restraining sleeve is arranged in the bearing box body, the axis of the oil slinger restraining sleeve is not concentric with the axis of a pump shaft and is positioned above the axis of the pump shaft, the outer end of the oil slinger restraining sleeve is fixedly connected with the bearing box body, one end of the inner hole of the oil slinger restraining sleeve is fixedly connected with the periphery of the fixing ring, oil slinger insertion holes are respectively formed in two side walls of the other end face,

the bearing bush is sleeved on the pump shaft, the inner lower wall of the bearing bush is contacted with the lower wall of the pump shaft, a top gap is formed between the upper wall and the pump shaft, a side gap is formed between the two side walls and the pump shaft, so that the pump shaft is prevented from being contacted with the bearing bush in a large area in a high-speed rotation process to generate heat, a fixing flange is fixedly arranged on the periphery of the bearing bush, an oil slinger moving space is formed between the upper wall of the bearing bush and an oil slinger restraining sleeve, a semi-annular through groove is arranged in the middle of the upper half wall of the bearing bush and is arranged along the circumferential direction, the periphery of one end of the bearing bush is inserted into the fixing,

the oil slinger penetrates through oil slinger movable insertion holes on two sides of the oil slinger restraining sleeve, the upper part of the oil slinger penetrates through the oil slinger movable insertion holes on two sides of the oil slinger restraining sleeve, the oil slinger falls on the pump shaft through self weight, the lower part of the oil slinger restraining sleeve is positioned at the lower part of the oil slinger restraining sleeve and is contacted with lubricating oil in the bearing box body, when the oil slinger is driven by the pump shaft to rotate, the upper part of the oil slinger can movably rotate in an oil slinger movable space, the lubricating oil is thrown through the oil slinger, the lubricating oil is brought into the bearing bush in the oil slinger restraining sleeve through the semi-annular insertion hole on the upper part, the gap between the pump shaft and the bearing bush is gradually reduced, the gap between the lower part of the pump shaft and the bearing bush is gradually reduced, the lubricating oil is extruded to generate rigidity to lift the pump shaft, the pump shaft has small deformation, stable operation, long service life, low maintenance cost and high working efficiency.

According to the invention, the oil inlet hole is formed in one side wall of the bearing bush, the oil outlet hole is formed in the other side wall of the bearing bush, the oil inlet hole and the oil outlet hole respectively correspond to the side gaps, so that when the oil slinger is driven by the pump shaft to rotate, the upper part of the oil slinger can movably rotate in the oil slinger moving space, lubricating oil is thrown by the oil slinger, the lubricating oil is brought into the bearing bush in the oil slinger restraint sleeve through the oil inlet hole and the semi-annular through groove in the upper part of the oil slinger, and the oil film brings out heat between the pump shaft and the bearing bush and discharges the heat along with the.

The inner wall of the bearing bush is circumferentially provided with oil grooves at intervals, and the oil grooves are axially arranged. So as to be beneficial to more fully storing oil for the bearing bush.

According to the invention, the two ends of the inner wall of the bearing bush are respectively provided with the oil baffle walls, the inner diameter of each oil baffle wall is smaller than that of the bearing bush, the bearing bush is contacted with the pump shaft through the oil baffle walls, the inner wall of each oil baffle wall is axially provided with the oil outlet groove, the oil outlet groove is communicated with the oil groove, and the width of the oil outlet groove is smaller than that of the oil groove, so that the pressure of oil in the bearing bush is maintained through the oil baffle walls.

The oil slinger restraining sleeve can also be provided with oil outlets on the upper wall and the lower wall respectively, so that oil thrown out by the oil slinger and falling into the upper wall of the oil slinger restraining sleeve can flow into the bearing bush through the oil outlet on the upper wall, and the oil flowing out of the bearing bush flows into the bearing box body through the oil outlet on the lower wall.

The left end of the oil slinger restraining sleeve is abutted against the outer ring of the roller bearing, so that lubricating oil flowing out of the inner wall of the oil slinger restraining sleeve along the axial direction flows into the roller bearing through the outer ring of the roller bearing, and the roller bearing is cooled and lubricated.

The locking nut can be sleeved with a roller bearing oil slinger, the lower part of the roller bearing oil slinger is contacted with lubricating oil, the outer wall of the locking nut is gradually transited from the large diameters at the two ends to the small diameter in the middle, so that the roller bearing oil slinger is restrained to always correspond to the small diameter in the middle of the locking nut, and the lubricating oil is thrown into a roller bearing cavity through the roller bearing oil slinger to lubricate the roller bearing.

By adopting the structure, the invention has the advantages of novel structure, convenient processing, small pump shaft deformation, stable operation, no vibration and noise, long service life, low maintenance cost, high working efficiency and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention.

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

Fig. 3 is a cross-sectional view of C-C in fig. 2.

Fig. 4 is a schematic structural view of a bearing shell.

FIG. 5 is a schematic structural diagram of a stationary state of a bearing bush and a pump shaft.

Reference numerals: the bearing comprises a bearing box body 1, a bearing box cover 2, a roller bearing 3, a bearing bush 4, a sliding bearing oil slinger 5, a lock nut 6, a bearing anti-rotation sleeve 7, an oil slinger restraining sleeve 8, a fixing ring 9, a fixing ring 10, an oil slinger insertion hole 11, a fixing flange 12, an oil slinger moving space 13, a semi-annular through groove 14, an oil inlet hole 15, an oil outlet hole 16, an oil groove 17, an oil baffle wall 18 and a fixing bolt 23, wherein an oil outlet groove 19, an oil outlet 20, a roller bearing oil slinger 21, lubricating oil 22 and the fixing bolt are axially arranged on the.

Detailed Description

The invention is described below with reference to the accompanying drawings and examples.

As shown in the attached drawings, a bearing lubrication supercharging device of a horizontal centrifugal pump comprises a bearing box body 1, a bearing box cover 2, a roller bearing 3, a bearing bush 4, a sliding bearing oil slinger 5, a lock nut 6, a bearing anti-rotation sleeve 7 and a pump shaft 8, wherein the connection structure of the bearing box body 1, the bearing box cover 2, the roller bearing 3, the lock nut 6, the bearing anti-rotation sleeve 7 and the pump shaft 8 is the same as that of the prior art, which is not described in detail, the bearing lubrication supercharging device is characterized by further comprising an oil slinger restraining sleeve 9 and a fixing ring 10, the oil slinger restraining sleeve 9 is arranged in the bearing box body 1, the axis of the oil slinger restraining sleeve 9 is not concentric with the axis of the pump shaft 8 and is positioned above the axis of the pump shaft 8, the outer end of the oil slinger restraining sleeve 9 is fixedly connected with the bearing box body 1, one end of an inner hole of the, the slinger insertion hole 11 is axially extended,

the bearing bush 4 is sleeved on the pump shaft 8, the inner lower wall of the bearing bush 4 is contacted with the lower wall of the pump shaft 8, a top gap b1 is formed between the upper wall and the pump shaft 8, a side gap b2 is formed between the two side walls and the pump shaft, so that the pump shaft 8 is prevented from being contacted with the bearing bush 4 in a large area to generate heat in the high-speed rotation process, a fixed flange 12 is fixedly arranged on the periphery of the bearing bush 4, an oil slinger moving space 13 is formed between the upper wall of the bearing bush 4 and the oil slinger restraining sleeve 9, a semi-annular through groove 14 is arranged in the middle of the upper half wall of the bearing bush 4, the semi-annular through groove 14 is arranged along the circumferential direction, the periphery of one end of the bearing bush 4 is inserted into the,

the sliding bearing oil slinger 5 penetrates through oil slinger movable insertion holes 11 on two sides of an oil slinger restraining sleeve 9, the upper part of the sliding bearing oil slinger 5 is placed in a semi-annular through groove 14 of a bearing bush and falls on a pump shaft 8 through self weight, the lower part of the sliding bearing oil slinger restraining sleeve 9 is positioned at the lower part of the oil slinger restraining sleeve 9 and is contacted with lubricating oil in a bearing box body 1, when the sliding bearing oil slinger 5 is driven by the pump shaft 8 to rotate, the upper part of the sliding bearing oil slinger can movably rotate in an oil slinger movable space 13, the lubricating oil is thrown through the sliding bearing oil slinger 5, the lubricating oil is brought into the bearing bush 4 in the oil slinger restraining sleeve 9 through the semi-annular through groove 14 at the upper part, as the pump shaft 8 and the bearing bush 4 are not concentric and the gap at the lower part is gradually reduced, the lubricating oil is extruded to generate a rigid oil film to lift the pump shaft 8, so that the oil, the oil supplement amount of the bearing bush 4 is greatly higher than that of other structures, so that the pump shaft has small deformation, stable operation, long service life, low maintenance cost and high working efficiency.

According to the invention, the oil inlet hole 15 is formed in one side wall of the bearing bush 4, the oil outlet hole 16 is formed in the other side wall of the bearing bush 4, the oil inlet hole 15 and the oil outlet hole 16 respectively correspond to the side gap b2, so that when the sliding bearing oil slinger 5 is driven by the pump shaft 8 to rotate, the upper part of the sliding bearing oil slinger can movably rotate in the oil slinger moving space 13, lubricating oil is thrown by the sliding bearing oil slinger 5, the lubricating oil is brought into the bearing bush in the oil slinger restraint sleeve 9 through the oil inlet hole 15 and the semi-annular through groove 14 in the upper part of the sliding bearing oil slinger, and the oil film brings out heat between the pump shaft 8 and the bearing bush 4 and discharges.

The inner wall of the bearing bush 4 is circumferentially provided with oil grooves 17 at intervals, and the oil grooves 17 are arranged along the axial direction. So as to be beneficial to more fully storing oil for the bearing bush 4.

According to the invention, the two ends of the inner wall of the bearing bush are respectively provided with the oil baffle walls 18, the inner diameter of each oil baffle wall is smaller than that of the bearing bush, the bearing bush is contacted with the pump shaft 8 through the oil baffle walls 18, the inner wall of each oil baffle wall 18 is axially provided with the oil outlet groove 19, the oil outlet grooves 19 are communicated with the oil grooves 17, and the width of each oil outlet groove is smaller than that of the oil grooves 17, so that the pressure of oil in the bearing bush can be maintained through the oil baffle walls.

The invention can also be provided with oil outlets 20 on the upper wall and the lower wall of the oil slinger restraint sleeve 9 respectively, so that the oil thrown out of the sliding bearing oil slinger 5 and falling into the upper wall of the oil slinger restraint sleeve 9 flows into the bearing bush 4 through the oil outlet 20 on the upper wall, and the oil flowing out of the bearing bush 4 flows into the bearing box body 1 through the oil outlet 20 on the lower wall.

The left end of the oil slinger restraint sleeve 9 is abutted against the outer ring of the roller bearing 3, so that lubricating oil flowing out of the inner wall of the oil slinger restraint sleeve 9 along the axial direction flows into the roller bearing 3 through the outer ring of the roller bearing 3, and the roller bearing 3 is cooled and lubricated.

The locking nut 6 can be sleeved with a roller bearing oil slinger 21, the lower part of the roller bearing oil slinger 21 is in contact with lubricating oil 22, the outer wall of the locking nut 6 is in transition from large diameters at two ends to small diameters in the middle, so that the roller bearing oil slinger is restrained to always correspond to the small diameter in the middle of the locking nut, and the lubricating oil is thrown into a roller bearing cavity through the roller bearing oil slinger to lubricate the roller bearing.

When the centrifugal pump works, a pump shaft 8 rotates under the driving of a driving part to drive an impeller to pump liquid, a roller bearing oil slinger 21 sleeved on a lock nut 6 slings lubricating oil into a roller bearing 3 to cool and lubricate the roller bearing 3 in the process of high-speed rotation of the pump shaft 8, a sliding bearing oil slinger 5 on a bearing bush 4 rotates centrifugally like a hula hoop under the driving of the pump shaft 8, the upper part can rotate movably in an oil slinger moving space 13, when the sliding bearing oil slinger 5 is in contact with the pump shaft 8, the lubricating oil brought out by the sliding bearing oil slinger 5 directly falls on the pump shaft 8 through a semi-annular through groove 14 on the upper part, the lubricating oil is extruded to generate a rigid oil film to lift the pump shaft 8 because the pump shaft 8 and the bearing bush 4 are not concentric and the gap on the lower part is gradually reduced, and oil is continuously fed into the semi-annular through groove 14 on the upper part of, the heat between the pump shaft 8 and the bearing bush 4 is continuously taken out through the replaced oil film and flows out along with the side clearance and the oil outlet hole, when the sliding bearing oil slinger 5 is lifted up, and the top of the sliding bearing oil slinger 5 is contacted with the upper part of the oil slinger restraint sleeve 9, the lubricating oil is contacted with the inner wall of the oil slinger restraint sleeve 9 and flows out through the oil outlet 20 of the upper wall, so that the lubricating oil flows downwards along the periphery of the oil slinger restraint sleeve 9 and flows into the pump shaft 8 and the roller bearing 3 again.

In addition, in the high-speed rotation process of the pump shaft 8, the oil grooves 17 in the inner wall of the bearing bush 4 are filled with lubricating oil, so that the lubrication between the pump shaft 8 and the bearing bush 4 is fully ensured, the oil retaining walls 18 at the two ends of the bearing bush 4 block the oil and the oil is slowly discharged from the oil outlet groove 19, the pressure maintaining effect is further achieved, the oil supplementing amount of the bearing bush 4 is greatly higher than that of other structures, and the deformation of the pump shaft is remarkably reduced.

By adopting the structure, the invention has the advantages of novel structure, convenient processing, small pump shaft deformation, stable operation, no vibration and noise, long service life, low maintenance cost, high working efficiency and the like.