CN218407884U

CN218407884U - Three-point bearing supporting structure of special pump for oil field long-distance pipeline

Info

Publication number: CN218407884U
Application number: CN202222182923.6U
Authority: CN
Inventors: 王冠超; 李佳
Original assignee: Shandong Shenwei Pump Technology Co ltd
Current assignee: Shandong Shenwei Pump Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-01-31
Anticipated expiration: 2032-08-18

Abstract

The utility model belongs to the technical field of the pump shaft supports, concretely relates to three point bearing support structure of special pump of oil field long distance pipeline, including pump case and its inside rotor part, the pump shaft runs through both ends about the pump case, and the both ends of pump shaft are equipped with pump front bearing supporter and pump rear bearing supporter respectively, are equipped with front bearing and rear bearing in the pump front bearing supporter and the pump rear bearing supporter respectively, and front bearing and rear bearing are antifriction bearing, and the middle part of pump shaft still is equipped with the intermediate bearing, and the intermediate bearing is the water lubricated bearing. The utility model increases the rigidity of the multistage pump rotor, reduces the vibration value, and is beneficial to improving the operation stability; radial loads are reasonably distributed, the stress condition of bearings at two ends is improved, and the service life of the bearings is prolonged; the interstage seal clearance is reduced, the internal leakage is reduced, and the efficiency of the water pump is improved; the middle aquatic slide bearing of adoption also can the direct use in the medium that contains impurity particulate matter, realizes that the medium is zero to leak, the oil-free operation, changes simple and conveniently.

Description

Three-point bearing supporting structure of special pump for oil field long-distance pipeline

Technical Field

The utility model relates to a three point bearing structure of special pump of oil field long distance pipeline belongs to pump shaft support technical field.

Background

The HDK type pump is a novel multi-stage horizontal middle-open type high-pressure pump, and is mainly used in a long-distance pipeline of an oil field. The pump has the advantages that the impeller is symmetrically distributed, the axial force can be balanced in a self-balancing mode, the radial force is the core problem of the pump, generally, the pump is of a two-point bearing supporting structure, the deflection of a pump shaft is large, the risk of friction locking damage of a rotor and a pump body is increased, and the pump efficiency is reduced due to the fact that the gap between anti-lock sealing rings is increased, so that the design concept, the environment protection concept and the maintenance concept of the pump need to be completely new and upgraded under the conditions that the environmental conditions of an oil field are poor and the conditions are limited. In order to solve the problem, a middle water lubrication sliding bearing is additionally designed, a three-point bearing supporting structure is adopted, and a more optimal choice is provided for a pump for a long-distance pipeline of an oil field in China.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the three-point bearing supporting structure of the pump special for the long-distance pipeline in the oil field is provided, and the operation stability is improved.

Three point bearing structure of special pump of oil field long distance pipeline, including pump case and its inside rotor part, the pump shaft runs through both ends about the pump case, the both ends of pump shaft are equipped with pump front bearing supporter and pump rear bearing supporter respectively, are equipped with front bearing and rear bearing in the pump front bearing supporter and the pump rear bearing supporter respectively, front bearing and rear bearing are antifriction bearing, the middle part of pump shaft still is equipped with the intermediate bearing, the intermediate bearing is the water lubricated bearing.

The utility model discloses the both sides of pump case are equipped with front end housing and rear end cap respectively, pump front bearing supporter and pump rear bearing supporter be located outside the end cover of both sides.

The pump front bearing support body comprises a front bearing seat, a front bearing seat support ring and a front sealing cover, wherein the front sealing cover seals the front bearing in the front bearing seat, the front bearing seat is fixed in the front bearing seat support ring, and the lower part of the front bearing seat support ring is connected with the lower part of one end of a pump shell through a bolt; the pump rear bearing support body comprises a rear bearing seat, a rear bearing seat support ring and a rear sealing cover, the rear sealing cover seals the rear bearing in the rear bearing seat, the rear bearing seat is fixed in the rear bearing seat support ring, the lower part of the rear bearing seat support ring is connected with the lower part of the other end of the pump shell through a bolt, and the pump rear bearing support body is convenient to disassemble and maintain.

The middle bearing is fixed on the clapboard in the middle of the pump cavity through a positioning pin.

Preferably, the front bearing adopts a cylindrical roller bearing, and the rear bearing adopts a pair of angular contact ball bearings.

In the utility model, a rolling bearing is arranged in the bearing support body (the coupling end) in front of the pump, which can bear radial load and also has the function of supporting and positioning, and can be a deep groove ball bearing, a cylindrical roller bearing or a tapered roller bearing, particularly the oil lubrication mode is adopted according to the pump load;

the middle bearing is a water-lubricated bearing, consists of a metal bearing matrix and a high-molecular wear-resistant/corrosion-resistant/high-temperature-resistant material, is self-lubricated by a medium, and bears radial force mainly by the metal bearing matrix;

the rear bearing support body of the pump is internally provided with rolling bearings which are set as angular contact ball bearings, are used in pairs, mainly bear radial force and partial axial force and adopt an oil lubrication mode. The utility model discloses constitute the three point bearing structure of pump by above-mentioned three point bearing.

Compared with the prior art, the utility model beneficial effect who has is:

1. the rigidity of the multistage pump rotor is increased, the vibration value is reduced, and the operation stability is improved.

2. The radial load is reasonably distributed, the stress condition of the bearings at two ends is improved, and the service life of the bearings is prolonged.

3. Do benefit to and reduce interstage seal clearance, reduce inside and leak, improve water pump efficiency.

4. The sliding bearing in the middle water is adopted, can be directly used in a medium containing impurity particles, and realizes zero leakage, oil-free operation and simple and convenient replacement of the medium.

Drawings

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

In the figure: a front bearing block 1; a front bearing support ring 2; a front end cap 3; a pump housing 4; a pump shaft 5; a positioning pin 6; a rear end cap 7; a rear bearing seat 8; a rear cover 9; a front cover 10; a front bearing 11; an intermediate bearing 12; a rear bearing support ring 13; a rear bearing 14.

Detailed Description

The invention will be further described with reference to specific examples. However, in the description of the present invention, it should be noted that the terms "front end", "rear end", "left and right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1, the three-point bearing supporting structure of the pump dedicated for the long transport pipeline in the oilfield according to the embodiment includes a pump case 4 and a rotor component inside the pump case, a pump shaft 5 penetrates through left and right ends of the pump case 4, two ends of the pump shaft 5 are respectively provided with a pump front bearing support body and a pump rear bearing support body, two sides of the pump case 4 are respectively provided with a front end cover 3 and a rear end cover 7, and the pump front bearing support body and the pump rear bearing support body are located outside end covers on two sides.

The pump front bearing support body comprises a front bearing seat 1, a front bearing seat support ring 2 and a front sealing cover 10, wherein the front sealing cover 10 seals a front bearing 11 in the front bearing seat 1, the front bearing seat 1 is fixed in the front bearing seat support ring 2, and the lower part of the front bearing seat support ring 2 is connected with the lower part of one end of a pump shell 4 through a bolt; the pump rear bearing support body comprises a rear bearing seat 8, a rear bearing seat support ring 13 and a rear sealing cover 9, the rear sealing cover 9 seals a rear bearing 14 in the rear bearing seat 8, the rear bearing seat 8 is fixed in the rear bearing seat support ring 13, and the lower part of the rear bearing seat support ring 13 is connected with the lower part of the other end of the pump shell 4 through a bolt. The front bearing 11 is a cylindrical roller bearing, and the rear bearing 14 is a pair of angular contact ball bearings.

The middle part of the pump shaft 5 of the embodiment is also provided with a middle bearing 12, the middle bearing 12 is a water lubrication bearing, and the middle bearing 12 is fixed on a partition board in the middle of the pump cavity through a positioning pin 6.

Compared with the traditional general pump, the three-point (two ends and middle) bearing support has reasonable design, so that the pump has the characteristics of high efficiency, energy conservation, no leakage, simple maintenance, stable and reliable operation, long service life, small vibration, low noise, low fault, convenience in installation and maintenance and the like. Can convey water, oil and common media similar to water and oil, and can also be applied to the conveyance of petrochemical process liquid, the water supply of a high-pressure boiler, a barren liquid pump of a synthetic ammonia device, a pump for an ethylene device, various remote water conveying occasions, the diversion engineering of a yellow river, the underground drainage of a mine, the seawater desalination engineering and the like.

Of course, the foregoing is merely exemplary of the present invention and should not be construed as limiting the scope of the present invention. The present invention is not limited to the above examples, and the equivalent changes and improvements made within the essential scope of the present invention should be included within the patent coverage of the present invention.

Claims

1. The utility model provides a three point bearing structure of special pump of oil field long distance pipeline, includes pump case (4) and its inside rotor part, its characterized in that: both ends about pump case (4) are run through in pump shaft (5), and the both ends of pump shaft (5) are equipped with pump front bearing supporter and pump rear bearing supporter respectively, are equipped with front bearing (11) and rear bearing (14) in pump front bearing supporter and the pump rear bearing supporter respectively, and front bearing (11) and rear bearing (14) are antifriction bearing, and the middle part of pump shaft (5) still is equipped with intermediate bearing (12), and intermediate bearing (12) are water lubricated bearing.

2. The three-point bearing support structure of the special pump for the oilfield long-distance pipeline according to claim 1, characterized in that: the two sides of the pump shell (4) are respectively provided with a front end cover (3) and a rear end cover (7), and the pump front bearing support body and the pump rear bearing support body are positioned outside the end covers at the two sides.

3. The three-point bearing support structure of the special pump for the oilfield long-distance pipeline according to claim 2, wherein the three-point bearing support structure comprises: the pump front bearing support body comprises a front bearing seat (1), a front bearing seat support ring (2) and a front sealing cover (10), wherein the front sealing cover (10) seals a front bearing (11) in the front bearing seat (1), the front bearing seat (1) is fixed in the front bearing seat support ring (2), and the lower part of the front bearing seat support ring (2) is connected with the lower part of one end of a pump shell (4) through a bolt; the pump rear bearing support body comprises a rear bearing seat (8), a rear bearing seat support ring (13) and a rear sealing cover (9), the rear sealing cover (9) seals a rear bearing (14) in the rear bearing seat (8), the rear bearing seat (8) is fixed in the rear bearing seat support ring (13), and the lower part of the rear bearing seat support ring (13) is connected with the lower part of the other end of the pump shell (4) through a bolt.

4. The three-point bearing support structure of the special pump for the oilfield long-distance pipeline according to claim 1, characterized in that: the middle bearing (12) is fixed on a partition plate in the middle of the pump cavity through a positioning pin (6).

5. The three-point bearing support structure of the special pump for the oilfield long-distance pipeline according to claim 1, characterized in that: the front bearing (11) adopts a cylindrical roller bearing, and the rear bearing (14) adopts a pair of angular contact ball bearings.