A lubricating structure for a pump

Abstract

The utility model discloses a kind of lubricating structures for pump, including driving shaft, connecting flange column, shaft sleeve, upper closed ring, lower closed ring, lubricating oil ring and oil seal ring group. One-way oil cavity is formed by shaft sleeve, upper closed ring, lower closed ring, lubricating oil ring and oil seal ring group;Wherein shaft sleeve is installed on driving shaft, and rotate with driving shaft, and it is the rotating part of one-way oil cavity;Upper closed ring, lower closed ring, lubricating oil ring and oil seal ring group are installed in connecting flange column, and it is the fixed part of one-way oil cavity;The fixed part is in order from top to bottom as upper closed ring, lubricating oil ring, oil seal ring group, lubricating oil ring and lower closed ring, and lower closed ring is in contact with fixed ring, i.

Description

Technical Field

[0001] This utility model belongs to the field of sand suction pump manufacturing technology, and specifically relates to a pump lubrication structure. Background Technology

[0002] Sand pumps, also known as suction pumps or dredging pumps, are a type of centrifugal pump industrial equipment. They are mainly used in river dredging, seabed sand dredging, mineral sand extraction, and land reclamation. Their core function is to transport highly abrasive media containing up to 60% solid particles, such as slurry, slag, and fly ash. They generally consist of a pump body, impeller, wear plate, motor frame, and bearing assembly. The pump shaft seal typically uses a rubber-framed oil seal.

[0003] A sand suction pump used for sand extraction generally consists of a pump casing, pump cover, impeller, pump shaft and bushing, oil seal ring, etc. The impeller is mounted on the shaft end through a threaded shaft hole in its center. Sand suction pumps operate for long periods in harsh environments. After use, a significant amount of debris accumulates between the shaft bushing and the pump shaft. During pump operation, components such as the impeller or plunger experience wear and friction. Current practice involves applying yellow grease to the pump shaft during assembly to reduce wear and friction, but this method has poor lubrication and cannot replenish lost grease during use; it can only be replenished during disassembly and repair, which is time-consuming, labor-intensive, and costly.

[0004] In order to effectively improve the maintenance efficiency of adding grease to the pump and reduce maintenance costs, a lubrication structure for sand suction pumps needs to be proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a lubrication structure for pumps to solve the problem of poor shaft lubrication and inability to replenish lubricating grease in a timely manner in the aforementioned background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pump lubrication structure, comprising...

[0007] Drive shaft;

[0008] A connecting flange post is open at both ends and has a flange plate at the lower end, with a retaining ring on the end face of the flange plate.

[0009] The drive shaft is fitted inside the connecting flange column;

[0010] Preferably, it further includes a one-way oil cavity formed by a bushing, an upper sealing ring, a lower sealing ring, a lubricating oil ring, and an oil seal ring assembly; the bushing is mounted on the drive shaft and rotates with the drive shaft, forming the rotating part of the one-way oil cavity; the upper sealing ring, lower sealing ring, lubricating oil ring, and oil seal ring assembly are installed inside the connecting flange column, forming the fixed part of the one-way oil cavity; the fixed part consists of, from top to bottom, an upper sealing ring, a lubricating oil ring, an oil seal ring assembly, a lubricating oil ring, and a lower sealing ring, wherein the lower sealing ring is in contact with the fixed ring;

[0011] The oil seal ring assembly includes several oil seal rings, each oil seal ring comprising a body, an annular groove, a small-diameter oil shoulder, and a large-diameter oil shoulder; the annular groove is disposed within the body, and the small-diameter oil shoulder and the large-diameter oil shoulder are both annular and respectively disposed on both sides of the annular groove, with the inner diameter of the lubricating oil ring being larger than the outer diameter of the bushing.

[0012] Preferably, the connecting flange column is provided with an upper oil injection hole and an oil drain hole; the lubricating oil ring includes a ring body, an annular oil grooves respectively provided on the inner and outer sides of the ring body, and a plurality of through holes evenly provided at the bottom of the annular oil grooves; the through holes are installed to match the positions of the oil injection hole and the oil drain hole respectively.

[0013] Preferably, the top of the small-diameter oil shoulder is an inclined boss, which is inclined outward from the body and is made of wear-resistant rubber; the diameter of the end face of the inclined boss matches the outer diameter of the bushing; both the inner and outer walls of the inclined boss are inclined surfaces; a wire groove is provided at the connection position between the annular groove and the small-diameter oil shoulder, and an elastic metal ring is provided in the wire groove.

[0014] Preferably, the upper end face of the upper sealing ring is provided with a retaining ring, which is mounted on the connecting flange post; the upper sealing ring includes a body, an annular groove, a small-diameter sealing shoulder, and a large-diameter sealing shoulder; the annular groove is disposed within the body, and the small-diameter sealing shoulder and the large-diameter sealing shoulder are both annular and respectively disposed on both sides of the annular groove; the cross-section of the small-diameter sealing shoulder and the large-diameter sealing shoulder are both rectangular, and the diameter of the small-diameter sealing shoulder matches the outer diameter of the bushing.

[0015] Preferably, the lower sealing ring includes a body, an annular groove, a small-diameter sealing shoulder, and a large-diameter sealing shoulder; the annular groove is disposed within the body, and the small-diameter sealing shoulder and the large-diameter sealing shoulder are both annular and respectively disposed on both sides of the annular groove; the cross-sections of the small-diameter sealing shoulder and the large-diameter sealing shoulder are both rectangular, and the diameter of the small-diameter sealing shoulder matches the outer diameter of the bushing.

[0016] Preferably, both the oil injection hole and the oil drain hole are internally threaded holes, with a grease fitting installed on the oil injection hole; and a grease fitting or a plug installed on the oil drain hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By setting up a one-way oil chamber, the pump shaft can be replenished with lubricating grease at any time. At the same time, the oil seal ring assembly can also prevent foreign objects such as fine sand from entering the one-way oil chamber from the pump casing, further improving the service life of the pump shaft. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0020] Figure 2 This is an enlarged structural diagram of the unidirectional oil cavity (A region) of this utility model;

[0021] Figure 3 This is an enlarged structural diagram of the unidirectional oil cavity section (region B) of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the lubricating oil ring of this utility model;

[0023] Figure 5 This is a schematic cross-sectional view of the lubricating oil ring of this utility model.

[0024] Figure 6 This is a three-dimensional structural diagram of the oil seal ring of this utility model;

[0025] Figure 7 This is a partial cross-sectional structural diagram of the oil seal ring of this utility model;

[0026] Figure 8 This is a schematic cross-sectional view of the upper and lower closed rings of this utility model.

[0027] In the diagram: 1. Connecting flange column; 1-1. Oil injection hole; 1-2. Oil drain hole; 2. Drive shaft; 3. Bushing; 4. One-way oil chamber; 4-1. Snap ring; 4-2. Upper sealing ring; 4-2-1. Small diameter sealing shoulder; 4-2-2. Large diameter sealing shoulder; 4-2-3. Annular groove; 4-3. Lubricating oil ring; 4-3-1. Ring body; 4-3-2. Annular oil groove; 4-3-3. Through hole; 4-4. Oil seal ring; 4-4-1. Inclined boss; 4-4-1-1. Inner wall surface; 4-4-1-2. Outer wall surface; 4-4-2. Elastic metal ring; 4-4-3. Large diameter oil shoulder; 4-4-4. Annular groove; 4-5. Lower sealing ring; 5. Fixing ring; 6. Grease nipple. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 8 This utility model provides a technical solution: a pump lubrication structure, including a drive shaft 2, a connecting flange column 1, a bushing 3, an upper sealing ring 4-2, a lower sealing ring 4-5, a lubricating oil ring 4-3, and an oil seal ring assembly. The connecting flange column 1 is open at both ends, with a flange plate at the lower end. A fixing ring 5 is provided on the end face of the flange plate, and the drive shaft 3 is fitted inside the connecting flange column 1.

[0030] The one-way oil chamber 4 is formed by a bushing 3, an upper sealing ring 4-2, a lower sealing ring 4-5, a lubricating oil ring 4-3, and an oil seal ring assembly. The bushing 3 is mounted on the drive shaft 2 and rotates with the drive shaft 2, forming the rotating part of the one-way oil chamber 4. The upper sealing ring 4-2, the lower sealing ring 4-5, the lubricating oil ring 4-3, and the oil seal ring assembly are installed inside the connecting flange column 1, forming the fixed part of the one-way oil chamber. The fixed part consists of the upper sealing ring 4-2, the lubricating oil ring 4-3, the oil seal ring assembly, the lubricating oil ring 4-3, and the lower sealing ring 4-5 from top to bottom. The lower sealing ring 4-5 is in contact with the fixed ring 5, that is, the lower sealing ring 4-5 is pressed against the upper end face of the fixed ring 5.

[0031] The oil seal ring assembly includes several oil seal rings 4-4, including a body, an annular groove 4-4-4, a small-diameter oil shoulder, and a large-diameter oil shoulder 4-4-3; the annular groove 4-4-4 is located in the body, and the small-diameter oil shoulder and the large-diameter oil shoulder 4-4-3 are both annular and are respectively located on both sides of the annular groove 4-4-4.

[0032] The connecting flange column 1 is provided with an upper oil filling hole 1-1 and an oil drain hole 1-2; the lubricating oil ring 4-3 includes a ring body 4-3-1, an annular oil groove 4-3-2 respectively provided on the inner and outer sides of the ring body 4-3-1, and several through holes 4-3-3 evenly provided at the bottom of the annular oil groove 4-3-2; when the through holes 4-3-3 are installed, they are matched with the positions of the oil filling hole 1-1 and the oil drain hole 1-2 respectively, and the inner diameter of the lubricating oil ring 4-3 is larger than the outer diameter of the bushing 3.

[0033] The top of the small-diameter oil shoulder is an inclined boss 4-4-1, which is inclined outward of the body and is made of wear-resistant rubber. The diameter of the end face of the inclined boss 4-4-1 matches the outer diameter of the bushing 3. The inner wall surface 4-4-1-1 and the outer wall surface 4-4-1-2 of the inclined boss 4-4-1 are both inclined surfaces. A wire groove is provided at the connection position between the annular groove 4-4-4 and the small-diameter oil shoulder, and an elastic metal ring 4-4-2 is provided in the wire groove.

[0034] The upper end face of the upper sealing ring 4-2 is provided with a retaining ring 4-1, which is mounted on the connecting flange column 1. The upper sealing ring 4-2 includes a body, an annular groove 4-2-3, a small-diameter sealing shoulder 4-2-1, and a large-diameter sealing shoulder 4-2-2. The annular groove 4-2-3 is located within the body, and the small-diameter sealing shoulder 4-2-1 and the large-diameter sealing shoulder 4-2-2 are respectively located on both sides of the annular groove 4-2-3. The cross-sections of both the small-diameter sealing shoulder 4-2-1 and the large-diameter sealing shoulder 4-2-2 are rectangular, wherein the diameter of the small-diameter sealing shoulder 4-2-1 matches the outer diameter of the bushing 3, thus providing a sealing function. It should be emphasized that the small-diameter sealing shoulder 4-2-1 is made of wear-resistant rubber material.

[0035] The lower sealing ring includes a body, an annular groove 4-2-3, a small-diameter sealing shoulder 4-2-1, and a large-diameter sealing shoulder 4-2-2. The annular groove 4-2-3 is located within the body, while the small-diameter sealing shoulder 4-2-1 and the large-diameter sealing shoulder 4-2-2 are respectively located on both sides of the annular groove 4-2-3. Both the small-diameter sealing shoulder 4-2-1 and the large-diameter sealing shoulder 4-2-2 have rectangular cross-sections. The diameter of the small-diameter sealing shoulder 4-2-1 matches the outer diameter of the bushing 3, thus providing a sealing function. It is important to note that the small-diameter sealing shoulder 4-2-1 is made of wear-resistant rubber material.

[0036] Both the oil filling hole 1-1 and the oil drain hole 1-2 are internally threaded holes. A grease nipple 6 is installed on the oil filling hole; a grease nipple 6 or a plug is installed on the oil drain hole 1-2.

[0037] The lubricating grease filling process after installation is as follows: The lubricating grease is first pressurized into the lubricating oil ring 4-3 through the grease nipple 6. Due to the presence of the through hole 4-3-3, the lubricating grease fills the two annular oil grooves 4-3-2, and then enters the oil seal ring 4-4. The inclined boss 4-4-1 of the oil seal ring 4-4 ​​deforms outward under pressure, thus forming a channel for the lubricating grease. Specifically, the inner wall surface 4-4-1-1 deforms outward under the pressure of the lubricating grease, and the end face of the inclined boss 4-4-1 separates from the bushing 3 (originally in surface contact). The lubricating grease then smoothly passes through under pressure and enters the next oil seal ring 4-4. The inner diameter of the large-diameter oil shoulder 4-4-3 is much smaller than the outer diameter of the bushing 3.

[0038] As described above, under pressure (including gravity), the lubricating grease will pass through several oil seal rings 4-4 and enter the lower closed ring 4-5. After the lower closed ring 4-5 is filled, the newly entering lubricating grease will rise into the upper closed ring 4-2.

[0039] Once the upper sealing ring 4-2 is also filled with lubricating grease, the lubricating grease will be discharged from the oil drain hole 1-2. At this point, the lubricating grease filling work is completed, and the oil drain hole 1-2 can be sealed.

[0040] Furthermore, the lubricating grease cannot flow in the reverse direction because the oil seal ring 4-4 ​​has a directional blocking function. The outer wall surface 4-4-1-2 of its inclined boss 4-4-1 will undergo reverse deformation under pressure, thereby pressing it against the bushing 3 to achieve effective sealing.

[0041] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pump lubrication structure, characterized in that: include Drive shaft; A connecting flange post is open at both ends and has a flange plate at the lower end, with a retaining ring on the end face of the flange plate. The drive shaft is fitted inside the connecting flange post; Its features include: a one-way oil cavity formed by a bushing, an upper sealing ring, a lower sealing ring, a lubricating oil ring, and an oil seal ring assembly; the bushing is mounted on the drive shaft and rotates with the drive shaft, forming the rotating part of the one-way oil cavity; the upper sealing ring, lower sealing ring, lubricating oil ring, and oil seal ring assembly are installed inside the connecting flange column, forming the fixed part of the one-way oil cavity; the fixed part consists of, from top to bottom, an upper sealing ring, a lubricating oil ring, an oil seal ring assembly, a lubricating oil ring, and a lower sealing ring, wherein the lower sealing ring is in contact with the fixed ring; The oil seal ring assembly includes several oil seal rings, each oil seal ring comprising a body, an annular groove, a small-diameter oil shoulder, and a large-diameter oil shoulder; the annular groove is disposed within the body, and the small-diameter oil shoulder and the large-diameter oil shoulder are both annular and respectively disposed on both sides of the annular groove.

2. The pump lubrication structure according to claim 1, characterized in that: The connecting flange column is provided with an upper oil filling hole and an oil drain hole; the lubricating oil ring includes a ring body, an annular oil grooves respectively provided on the inner and outer sides of the ring body, and a number of through holes evenly provided at the bottom of the annular oil grooves, and the inner diameter of the lubricating oil ring is larger than the outer diameter of the bushing.

3. The pump lubrication structure according to claim 1, characterized in that: The top of the small-diameter oil shoulder is an inclined boss, which is inclined outward from the body and is made of wear-resistant rubber; the diameter of the end face of the inclined boss matches the outer diameter of the bushing; both the inner and outer walls of the inclined boss are inclined surfaces; a wire groove is provided at the connection position between the annular groove and the small-diameter oil shoulder, and an elastic metal ring is provided in the wire groove.

4. The pump lubrication structure according to claim 1, characterized in that: The upper end face of the upper sealing ring is provided with a retaining spring, which is installed on the connecting flange post; the upper sealing ring includes a body, an annular groove, a small-diameter sealing shoulder, and a large-diameter sealing shoulder; the annular groove is disposed in the body, and the small-diameter sealing shoulder and the large-diameter sealing shoulder are both annular and are respectively disposed on both sides of the annular groove; the cross-section of the small-diameter sealing shoulder and the large-diameter sealing shoulder are both rectangular, and the diameter of the small-diameter sealing shoulder matches the outer diameter of the bushing.

5. A pump lubrication structure according to claim 1, characterized in that: The lower sealing ring includes a body, an annular groove, a small-diameter sealing shoulder, and a large-diameter sealing shoulder; the annular groove is disposed within the body, and the small-diameter sealing shoulder and the large-diameter sealing shoulder are both annular and respectively disposed on both sides of the annular groove; the cross-section of the small-diameter sealing shoulder and the large-diameter sealing shoulder are both rectangular, and the diameter of the small-diameter sealing shoulder matches the outer diameter of the bushing.

6. A pump lubrication structure according to claim 2, characterized in that: Both the oil filling hole and the oil drain hole are internally threaded holes. A grease fitting is installed on the oil filling hole, and a grease fitting or a plug is installed on the oil drain hole.

Images