Leakage-proof pipeline oil delivery pump with high assembly precision

Abstract

The utility model discloses a leakproof pipeline oil delivery pump with high assembly precision, which comprises an upper pump shell and a lower pump shell which are connected with each other, blind holes are arranged at bolt holes of the upper pump shell and the lower pump shell, and positioning circular rings are arranged in the blind holes. And the positioning circular ring is in clearance fit with the connecting bolt. And the blind hole and the bolt hole are coaxially arranged. The blind holes used for installing the positioning circular rings are formed in the bolt holes of the pump shells, so that the pump shells on the two sides can be preliminarily fixed before being assembled, and subsequent bolt installation is more accurate. Compared with taper pin positioning, the positioning mode is higher in strength and precision, the sealing performance of the oil delivery pump is guaranteed, the oil leakage problem is avoided, and meanwhile the production efficiency can be greatly improved. In order to further reduce the condition of oil leakage, an oil leakage prevention structure is arranged at the position of a bearing part fan of the bearing, so that oil possibly splashing out of the oil pump can flow back into the bearing body, and the situation that the lubricating performance of the bearing in the oil pump is affected due to reduction of the oil is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump connection, in particular to a connection structure at the joint of a pipeline oil pump. Background Art

[0002] like Figure 1 As shown in the figure, a conventional pipeline conveying pump mainly consists of upper and lower pump bodies, impellers, shafts, casing seals, impeller seals, mechanical seals, bearing components, suction sleeves, intermediate sleeves, suction bushings, intermediate bushings, intermediate stop sleeves, screw sleeves, and other parts. The part that ensures the positioning accuracy of the upper and lower pump bodies is the locating pins that connect them. However, this structure has the following two main disadvantages:

[0003] 1. The positioning holes need to be processed on special processing machines, which results in low production efficiency.

[0004] 2. The locating pins are manually driven into the locating holes of the upper and lower pump bodies. However, due to manual operation, the force of driving the locating pins is different, which leads to low accuracy of two-point positioning, easy to cause assembly errors, and the pump parameters cannot be guaranteed. Utility Model Content

[0005] The purpose of the utility model is to provide a high assembly precision leak-proof pipeline oil pump, which achieves the effect of a pipeline oil pump with high production efficiency, good assembly precision and more guaranteed parameters.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a high-assembly precision leak-proof pipeline oil pump, comprising an upper pump shell and a lower pump shell connected to each other, wherein blind holes are opened at the bolt holes of the upper pump shell and the lower pump shell, and positioning rings are installed in the blind holes.

[0007] Preferably, the positioning ring and the connecting bolt are in a clearance fit.

[0008] Preferably, the blind hole and the bolt hole are coaxially arranged.

[0009] Preferably, a driving shaft bearing support is installed on one side of the lower pump housing, and a non-driving shaft bearing support is installed on the other side of the lower pump housing. The non-driving shaft bearing support is installed with a fan through an oil blocking mechanism.

[0010] Preferably, the oil-blocking mechanism includes an oil-blocking bearing, which is mounted on the rotating shaft of the fan. A bearing groove is provided on the non-driving shaft bearing carrier, and the oil-blocking bearing is rotatably connected to the bearing groove.

[0011] Preferably, an annular oil retaining groove is provided on the outer side of the bearing groove, an oil return hole is provided at the bottom of the annular oil retaining groove, and the oil return hole is connected to the inner cavity of the non-drive shaft bearing support.

[0012] Preferably, an O-ring is provided between the oil retaining bearing and the rotating shaft of the fan.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By providing blind holes for mounting locating rings at the pump casing bolt holes, both pump casings can be initially secured before assembly, allowing for more accurate subsequent bolt installation. This positioning method offers greater strength and precision than taper pin positioning, ensuring the seal of the oil pump to prevent oil leaks while significantly improving production efficiency.

[0015] In order to further reduce the occurrence of oil leakage, an anti-leakage structure is set at the fan of the bearing carrier so that the oil that may splash out of the oil pump can flow back into the bearing body, avoiding the lubrication performance of the bearing in the oil pump being affected by the reduction of oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a single-sided pump casing in the prior art.

[0017] Figure 2 This is a schematic diagram of the upper pump casing of the present utility model.

[0018] Figure 3 This is a cross-sectional view of the blind hole of the present invention.

[0019] Figure 4 This is a cross-sectional view of the high assembly precision leak-proof pipeline oil pump of the utility model.

[0020] Figure 5 This is a detail diagram of point a of the present utility model.

[0021] 1. Upper pump casing; 2. Lower pump casing; 3. Blind hole; 4. Locating ring; 5. Drive shaft bearing carrier; 6. Non-drive shaft bearing carrier; 7. Fan; 8. Oil retaining bearing; 9. Annular oil retaining groove; 10. Oil return hole; 11. O-ring; 12. Connecting bolts. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 2-5The present invention provides a technical solution: a high-assembly-precision, leak-proof pipeline oil pump, comprising an upper pump housing 1 and a lower pump housing 2 connected to each other. Blind holes 3 are provided at the bolt holes of both the upper and lower pump housings 1 and 2. The blind holes 3 are coaxially arranged with the bolt holes. This installation method ensures accurate assembly of the upper and lower pump housings 1 and 2 before the connecting bolts 12 are installed. A locating ring 4 is installed within the blind hole 3. The locating ring 4 forms a clearance fit with the connecting bolts 12, ensuring that the connecting bolts 12 can smoothly pass through the locating ring 4 and be threadedly connected to the bolt holes of the pump housings on both sides.

[0024] To support the bearings, a drive shaft bearing support 5 is mounted on one side of the lower pump housing 2, and a non-drive shaft bearing support 6 is mounted on the other side of the lower pump housing 2. Both ends of the bearing are mounted on the drive shaft bearing support 5 and the non-drive shaft bearing support 6. To achieve a cooling effect, a fan 7 is mounted on the non-drive shaft bearing support 6 via an oil blocking mechanism.

[0025] Because splashing lubricant not only affects the external environment but also reduces bearing lubrication, to ensure proper sealing of fan 7, the oil-blocking mechanism includes an oil-blocking bearing 8 mounted on the rotating shaft of fan 7. An O-ring 11 is interposed between the oil-blocking bearing 8 and the rotating shaft of fan 7 to ensure proper sealing. A bearing groove is defined in the non-drive shaft bearing support 6, and the oil-blocking bearing 8 is rotatably connected to the bearing groove.

[0026] To reduce oil leakage, an annular oil retaining groove 9 is provided on the outside of the bearing groove. An oil return hole 10 is provided at the bottom of the annular oil retaining groove 9, and the oil return hole 10 is connected to the inner cavity of the non-drive shaft bearing support 6. When oil enters, it flows along the annular oil retaining groove 9 into the oil return hole 10 and flows back to the oil cavity of the non-drive shaft bearing support 6.

[0027] Working principle: During installation, the operator first places the positioning ring 4 in the blind hole 3 of the lower pump casing 2, then aligns the upper pump casing 1 and the lower pump casing 2, and makes the positioning ring 4 also fit into the blind hole 3 of the upper pump casing 1.

[0028] Screw the connecting bolt 12 into the bolt hole of the upper pump casing 1. As it continues to descend in height, it will pass through the positioning ring 4 in the blind hole 3 and enter the bolt hole of the lower pump casing 2, thereby completing the fixation between the upper pump casing 1 and the lower pump casing 2.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high assembly precision leak-proof pipeline oil pump, comprising an upper pump housing (1) and a lower pump housing (2) connected to each other, characterized in that: Blind holes (3) are provided at the bolt holes of the upper pump casing (1) and the lower pump casing (2), and positioning rings (4) are installed in the blind holes (3).

2. The high assembly precision leak-proof pipeline oil pump according to claim 1, characterized in that: The positioning ring (4) and the connecting bolt (12) are clearance-fitted.

3. The high assembly precision leak-proof pipeline oil pump according to claim 1, characterized in that: The blind hole (3) and the bolt hole are coaxially arranged.

4. The high assembly precision leak-proof pipeline oil pump according to claim 1, characterized in that: A drive shaft bearing support (5) is installed on one side of the lower pump housing (2), and a non-drive shaft bearing support (6) is installed on the other side of the lower pump housing (2). A fan (7) is installed on the non-drive shaft bearing support (6) via an oil blocking mechanism.

5. The high assembly precision leak-proof pipeline oil pump according to claim 4, characterized in that: The oil blocking mechanism includes an oil blocking bearing (8), which is mounted on the rotating shaft of the fan (7). A bearing groove is provided on the non-driving shaft bearing carrier (6), and the oil blocking bearing (8) is rotatably connected to the bearing groove.

6. The high assembly precision leak-proof pipeline oil pump according to claim 5, characterized in that: An annular oil retaining groove (9) is provided on the outer side of the bearing groove, an oil return hole (10) is provided at the bottom of the annular oil retaining groove (9), and the oil return hole (10) is connected to the inner cavity of the non-drive shaft bearing support (6).

7. The high assembly precision leak-proof pipeline oil pump according to claim 5, characterized in that: An O-ring (11) is provided between the oil retaining bearing (8) and the rotating shaft of the fan (7).

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