阅读说明：本技术 清水泵干油润滑结构及其润滑方法 (Clean water pump dry oil lubricating structure and lubricating method thereof ) 是由 徐礼记 孙恒锦 向瑞 李小飞 于 2020-05-19 设计创作，主要内容包括：本发明提供一种清水泵干油润滑结构及润滑方法,属于水泵制造技术领域,包括转轴和套设在转轴上的油封,油封的一侧外壁开设进油通道,远离进油通道的另一侧外壁上开设出油通道；在油封和转轴之间设有轴承,轴承设有一个轴承腔室,轴承腔室和所述进油通道、出油通道均连通；所述油封和转轴接触面上设有凹槽和回油槽；凹槽和回油槽竖向并列布置；油封的内壁上设有多组锯齿槽和环形槽；凹槽和回油槽对应连通锯齿槽和环形槽；梳齿槽与所述出油通道之间还具有连通梳齿槽和出油通道的过油通道。本发明中设置梳齿槽结构后,能够有效减少润滑物质的泄漏,轴承处的密封零部件减少,降低了生产成本。(The invention provides a dry oil lubricating structure and a dry oil lubricating method for a clean water pump, which belong to the technical field of water pump manufacturing, and comprise a rotating shaft and an oil seal sleeved on the rotating shaft, wherein the outer wall of one side of the oil seal is provided with an oil inlet channel, and the outer wall of the other side far away from the oil inlet channel is provided with an oil outlet channel; a bearing is arranged between the oil seal and the rotating shaft, the bearing is provided with a bearing cavity, and the bearing cavity is communicated with the oil inlet channel and the oil outlet channel; a groove and an oil return groove are formed in the contact surface of the oil seal and the rotating shaft; the groove and the oil return groove are vertically arranged in parallel; the inner wall of the oil seal is provided with a plurality of groups of sawtooth grooves and annular grooves; the groove and the oil return groove are correspondingly communicated with the sawtooth groove and the annular groove; an oil passing channel communicated with the combing tooth grooves and the oil outlet channel is also arranged between the combing tooth grooves and the oil outlet channel. After the comb tooth groove structure is arranged, the leakage of lubricating substances can be effectively reduced, the number of sealing parts at the bearing is reduced, and the production cost is reduced.)

1. The clean water pump dry oil lubricating structure comprises a rotating shaft (1) and an oil seal (4) sleeved on the rotating shaft (1), and is characterized in that an oil inlet channel (2) is formed in the outer wall of one side of the oil seal (4), and an oil outlet channel (3) is formed in the outer wall of the other side, far away from the oil inlet channel (2); a bearing (5) is arranged between the oil seal (4) and the rotating shaft (1), the bearing (5) is provided with a bearing chamber (6), and the bearing chamber (6) is communicated with the oil inlet channel (2) and the oil outlet channel (3); a groove (7) and an oil return groove (8) are formed in the contact surface of the oil seal (4) and the rotating shaft (1); the groove (7) and the oil return groove (8) are vertically arranged in parallel; a plurality of groups of sawtooth grooves (9) and annular grooves (10) are arranged on the inner wall of the oil seal (4); the groove (7) and the oil return groove (8) are correspondingly communicated with the sawtooth groove (9) and the annular groove (10); an oil passing channel (11) communicated with the combing tooth groove (9) and the oil outlet channel (3) is also arranged between the combing tooth groove (9) and the oil outlet channel (3).

2. The grease lubrication structure of the clean water pump according to claim 1, characterized in that a rotating shaft cavity (13) is arranged in the center of the rotating shaft (1).

3. The grease lubrication structure of the clean water pump as claimed in claim 2, wherein a shock absorption device (12) is arranged in the cavity (13) of the rotating shaft.

4. The grease lubrication structure of the clean water pump as claimed in claim 3, wherein the shock absorber (12) comprises a plurality of fixed balls (120) and a plurality of damping balls (121) and a spring (122); a plurality of fixing balls (120) are sequentially fixed on the outer wall of the rotating shaft cavity (13); wherein, four fixed balls (120) form a group and are correspondingly connected with a damping ball (121) through a spring (122).

5. The grease lubrication structure of the clean water pump as claimed in claim 4, wherein the vibration damping device (12) has a plurality of groups.

6. The dry oil lubricating structure of the clean water pump as claimed in claim 1, wherein the periphery of the oil seal (4) close to the sawtooth groove (41) is provided with an annular boss (42).

7. The dry oil lubricating structure of the clean water pump according to claim 1, wherein the oil seal (4) is further provided with an oil passing hole (43), and the oil passing hole (43) is communicated with the oil passing channel (11).

8. A method for lubricating a grease lubrication structure of a clean water pump according to any one of claims 1-7, wherein the method comprises the following steps:

firstly, after lubricating oil passes through a bearing chamber (6) and a lubricating bearing (5) through an oil inlet channel (2), a groove (7) and an oil return groove (8) are arranged on the contact surface of an oil seal (4) and a rotating shaft (1), the lubricating oil is guided into the rotating shaft (1) through the groove (7) and the oil return groove (8), and the rotating shaft (1) is lubricated along with the rotation of the rotating shaft (1);

and finally, lubricating oil lubricated by the rotating shaft (1) is provided with a plurality of groups of sawtooth grooves (9) and annular grooves (10) through the inner wall of the oil seal (4), enters the oil passing channel (11) through the sawtooth grooves (9) and the annular grooves (10), and is finally discharged through the oil outlet channel (3).

Technical Field

The invention belongs to the technical field of water pumps, and particularly relates to a dry oil lubricating structure of a clean water pump and a lubricating method thereof.

Background

In order to support a central shaft to balance an axial force caused by pressure difference, a central bearing and a thrust bearing which are self-lubricated by media are arranged in an existing clean water pump, wherein the central shaft is rotatably arranged in the central bearing, and the thrust bearing is arranged in a turbine cavity and abutted against one side of a turbine impeller, so that certain impact can be generated on the turbine impeller when the thrust bearing is lubricated by the lubricating media. However, because of unreasonable design of the lubricating structure, the turbine impeller in the existing turbine booster pump is damaged due to the impact of the lubricating medium, and the service life is greatly reduced.

Meanwhile, the motor bearing lubricating system is provided with more parts for ensuring sealing and preventing oil leakage, so that more production molds are used, the utilization rate of effective materials of the motor is low, and the overall production cost of the motor is high; in addition, grease is adopted for lubrication in the technical scheme, when the rotating speed of the motor is high, a large amount of heat is generated in the bearing, the temperature is increased, and the lubricating grease is extremely unfavorable for bearing lubrication after the temperature rise is increased; if lubrication is performed using lubricating oil, the lubricating oil flows into the interior of the motor through the bearing and the inner oil seal, causing leakage and contamination.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a dry oil lubricating structure of a clean water pump and a lubricating method thereof.

In order to achieve the purpose, the invention provides the following technical scheme:

the clean water pump dry oil lubricating structure comprises a rotating shaft and an oil seal sleeved on the rotating shaft, wherein an oil inlet channel is formed in the outer wall of one side of the oil seal, and an oil outlet channel is formed in the outer wall of the other side, far away from the oil inlet channel; a bearing is arranged between the oil seal and the rotating shaft, the bearing is provided with a bearing cavity, and the bearing cavity is communicated with the oil inlet channel and the oil outlet channel; a groove and an oil return groove are formed in the contact surface of the oil seal and the rotating shaft; the groove and the oil return groove are vertically arranged in parallel; the inner wall of the oil seal is provided with a plurality of groups of sawtooth grooves and annular grooves; the groove and the oil return groove are correspondingly communicated with the sawtooth groove and the annular groove; an oil passing channel communicated with the combing tooth grooves and the oil outlet channel is also arranged between the combing tooth grooves and the oil outlet channel.

Furthermore, a rotating shaft cavity is arranged in the center of the rotating shaft.

Furthermore, a shock absorption device is arranged in the cavity of the rotating shaft.

Further, the cushioning device comprises a plurality of fixed balls, a plurality of damping balls and a spring;

a plurality of fixing balls are sequentially fixed on the outer wall of the cavity of the rotating shaft; wherein four fixed balls form a set, correspond a damping ball through spring coupling.

Furthermore, the cushioning device has a plurality of groups.

Furthermore, an annular boss is arranged on the periphery of the oil seal close to the sawtooth groove.

Furthermore, an oil passing hole is further formed in the oil seal and communicated with the oil passing channel.

A lubricating method of a dry oil lubricating structure of a clean water pump comprises the following steps:

firstly, lubricating oil passes through a bearing cavity and a lubricating bearing through an oil inlet channel, a groove and an oil return groove are arranged on the contact surface of an oil seal and a rotating shaft, the lubricating oil is guided into the rotating shaft through the groove and the oil return groove, and the rotating shaft is lubricated along with the rotation of the rotating shaft;

the lubricating oil lubricated by the rotating shaft is provided with a plurality of groups of sawtooth grooves and annular grooves on the inner wall of the oil seal, enters the oil passing channel from the sawtooth grooves and the annular grooves, and is finally discharged from the oil outlet channel.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the comb tooth grooves and the annular grooves are formed in the oil seal, so that lubricating oil flowing into the inner oil seal is blocked by layers when passing through the comb tooth grooves and the annular grooves, flows back to the oil outlet channel through the oil passage and finally flows into the oil path circulating system, and the phenomenon of lubricating oil leakage can be effectively prevented; meanwhile, the outer wall of the cavity of the rotating shaft is provided with the shock absorption device, so that when the rotating shaft rotates at a high speed, the pump body is prevented from vibrating under the damping action.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the oil seal structure of the present invention;

FIG. 3 is a schematic view of a cushioning device according to the present invention.

The figure is marked with: 1-rotating shaft, 2-oil inlet channel, 3-oil outlet channel, 4-oil seal, 5-bearing, 6-bearing chamber, 7-groove, 8-oil return groove, 9-sawtooth groove, 10-annular groove, 11-oil passing channel, 12-vibration absorber, 13-rotating shaft cavity, 120-fixing ball, 121-damping ball, 122-spring, 41-sawtooth groove, 42-annular boss and 43-oil passing hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

As shown in fig. 1-3, the dry oil lubricating structure of the clean water pump of the embodiment includes a rotating shaft 1 and an oil seal 4 sleeved on the rotating shaft 1, wherein an oil inlet channel 2 is formed on an outer wall of one side of the oil seal 4, and an oil outlet channel 3 is formed on an outer wall of the other side far away from the oil inlet channel 2; a bearing 5 is arranged between the oil seal 4 and the rotating shaft 1, the bearing 5 is provided with a bearing chamber 6, and the bearing chamber 6 is communicated with the oil inlet channel 2 and the oil outlet channel 3; a groove 7 and an oil return groove 8 are formed on the contact surface of the oil seal 4 and the rotating shaft 1; the groove 7 and the oil return groove 8 are vertically arranged in parallel; a plurality of groups of sawtooth grooves 9 and annular grooves 10 are arranged on the inner wall of the oil seal 4; the groove 7 and the oil return groove 8 are correspondingly communicated with the sawtooth groove 9 and the annular groove 10; an oil passing channel 11 for communicating the combing tooth grooves 9 and the oil outlet channel 3 is also arranged between the combing tooth grooves 9 and the oil outlet channel 3. A rotating shaft cavity 13 is arranged in the center of the rotating shaft 1, a shock absorption device 12 is arranged in the rotating shaft cavity 13, and the shock absorption device 12 comprises a plurality of fixed balls 120, a plurality of damping balls 121 and a spring 122; a plurality of fixing balls 120 are sequentially fixed on the outer wall of the rotating shaft cavity 13; four of the fixing balls 120 are formed in a group, and correspondingly, one damping ball 121 is connected through a spring 122. The bradyseism device 12 has a plurality of groups. The periphery of the oil seal 4 close to the sawtooth groove 41 is provided with an annular boss 42. The oil seal 4 is also provided with an oil passing hole 43, and the oil passing hole 43 is communicated with the oil passing channel 11.

During specific lubrication, lubricating oil passes through the bearing cavity 6 through the oil inlet channel 2, a groove 7 and an oil return groove 8 are arranged on the contact surface of the oil seal 4 and the rotating shaft 1 after lubricating the bearing 5, the lubricating oil is guided into the rotating shaft 1 through the groove 7 and the oil return groove 8, and the rotating shaft 1 is lubricated along with the rotation of the rotating shaft 1;

the lubricating oil lubricated by the rotating shaft 1 is provided with a plurality of groups of sawtooth grooves 9 and annular grooves 10 on the inner wall of the oil seal 4, enters the oil passing channel 11 from the sawtooth grooves 9 and the annular grooves 10, and is finally discharged from the oil outlet channel 3.

The comb tooth grooves 9 and the annular grooves 10 are arranged on the oil seal 4, so that lubricating oil flowing into the oil seal 4 is blocked by layers when passing through the comb tooth grooves 9 and the annular grooves 10, flows back to the oil outlet channel 3 through the oil passage 11, and finally flows into the oil path circulating system, and the phenomenon of lubricating oil leakage can be effectively prevented; meanwhile, the outer wall of the cavity of the rotating shaft is provided with the shock absorption device 12, so that when the rotating shaft rotates at a high speed, the pump body is prevented from vibrating under the damping action.

The invention also discloses a lubricating method of the dry oil lubricating structure of the clean water pump, which comprises the following steps:

firstly, after lubricating oil passes through a bearing chamber 6 and a lubricating bearing 5 through an oil inlet channel 2, a groove 7 and an oil return groove 8 are arranged on the contact surface of an oil seal 4 and a rotating shaft 1, the lubricating oil is guided into the rotating shaft 1 through the groove 7 and the oil return groove 8, and the rotating shaft 1 is lubricated along with the rotation of the rotating shaft 1;

the lubricating oil lubricated by the rotating shaft 1 is provided with a plurality of groups of sawtooth grooves 9 and annular grooves 10 on the inner wall of the oil seal 4, enters the oil passing channel 11 from the sawtooth grooves 9 and the annular grooves 10, and is finally discharged from the oil outlet channel 3.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.