Eccentric oil-gas mixing delivery pump supported by magnetic suspension bearing

Abstract

The utility model discloses an eccentric oil-gas mixing delivery pump supported by a magnetic suspension bearing, which belongs to the field of power machinery and comprises a pump body and the magnetic suspension bearing, an eccentric shaft is arranged in the pump body, and rear end flanges are arranged on two sides of the periphery of a middle eccentric part of the eccentric shaft. The magnetic suspension bearing is used for supporting the rotor sleeve, contact, friction and abrasion are avoided, lubrication is not needed, the design that the supporting bearing is completely separated from the medium cavity is adopted, the eccentric rotor is arranged in the pump body, and the magnetic suspension bearing is installed in the eccentric rotor to be supported on the shaft for transmission. The eccentric rotor and the shell form a sealing body in the circumferential direction, the situation of internal leakage of a low-pressure cavity and a high-pressure cavity is avoided, the mechanical structure is simple, the principle is correct, manufacturing and maintenance are easy, the operation speed is controllable, noise and pollution are avoided, and the eccentric rotor can be used in a severe environment for a long time and is long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power machinery, and specifically relates to an eccentric oil-gas mixed conveying pump supported by magnetic suspension bearings. BACKGROUND

[0002] In the production process of oil, crude oil, natural gas, water, silt, flocculation and various viscous substances and corrosive substances are symbiotic, which puts high requirements on the conveying crude oil pump and compressor, especially the bearings in the pump and compressor, which are particularly prone to damage under the action of silt, corrosive substances and mechanical impact force.

[0003] Therefore, the technical personnel in the art provide an eccentric oil-gas mixed conveying pump supported by magnetic suspension bearings to solve the problems raised in the above background technology. SUMMARY

[0004] The utility model discloses a kind of eccentric oil-gas mixed conveying pumps supported by magnetic suspension bearings to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An eccentric oil-gas mixed conveying pump supported by magnetic suspension bearings, comprising a pump body and a magnetic suspension bearing, the pump body is internally provided with an eccentric shaft, the eccentric shaft is provided with a rear flange on each of the two sides of the outer periphery of the eccentric part in the middle part, the magnetic suspension bearing is installed between the rear flanges, a rotor sleeve is arranged between the outer periphery of the magnetic suspension bearing and the pump body, the rotor sleeve and the pump body form a crescent cavity on the outer periphery of the eccentric shaft above the magnetic suspension bearing, a partition plate is arranged at the top of the pump body, the partition plate is connected with the rotor sleeve through the square slot of the pump body, the medium cavity inside the pump body is divided into a high-pressure cavity and a low-pressure cavity, an upper cover is arranged on the pump body, the upper cover separates the medium cavity from the outside, the partition plate, the rotor sleeve and the pump body are sealed when the rotor sleeve moves, a pressure relief groove is arranged on the partition plate, the pressure relief groove faces the inlet end during installation, when a certain pressure is formed between the inlet and the outlet of the pump body, the medium in the outlet end flows back to the inlet end through the pressure relief groove after entering the top of the pump body.

[0007] As a further scheme of the utility model: a front flange is arranged on one side of the pump body at the extension end of the eccentric shaft, a rear flange is arranged on the other side of the pump body at the extension end of the eccentric shaft, and a movable gap is left between the front flange, the rear flange and the two ends of the rotor sleeve.

[0008] As a further scheme of the utility model: a sealing support sleeve and a sealing compression cover are arranged on the inner wall of the front flange and the rear flange at the rotating part of the eccentric shaft to provide rotary sealing and separate the medium cavity with pressure from the outside.

[0009] As a further scheme of the utility model: the front flange and the rear flank are provided with bearing support seat at one end away from each other, and the support bearing is installed between the bearing support seat and the eccentric shaft, and the support bearing is separately provided with the medium cavity, so that when the sealing support sleeve fails or has a problem, the medium will not contaminate the support bearing.

[0010] As a further scheme of the utility model: the bearing support seat of the front flange and the rear flange is provided with front cover and rear cover respectively at one side, and the front cover and the rear cover are connected with the rear cover through the fixed screw.

[0011] As a further scheme of the utility model: the pump body is provided with inlet pipe and outlet pipe for connecting the crescent cavity with the outside one by one at both sides.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a magnetic suspension bearing is used for supporting the rotor sleeve, and no contact, no friction, no wear and tear, and no lubrication are needed, adopts the design that the support bearing is completely separated from the medium cavity, the eccentric rotor is arranged in the inside of the pump body, the magnetic suspension bearing is installed in the eccentric rotor and is supported on the shaft to drive, the rotor forms the crescent cavity in the inside of the pump body, and the isolation plate passes through the shell and contacts the rotating eccentric rotor to become the sealed body, and the low-pressure cavity and the high-pressure cavity are formed, the eccentric rotor forms the sealed body along the circumferential direction with the shell, avoids the internal leakage of the low-pressure cavity and the high-pressure cavity, and the mechanical structure is simple, the principle is correct, easy to manufacture, easy to maintain, the running speed is controllable, realizes noiseless and non-pollution, can be used in the harsh environment for a long time, and has long service life. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the sectional view of the utility model;

[0015] Fig. 2 It is the sectional view of the pump volume cavity in the utility model.

[0016] In the drawing: 1, eccentric shaft;2, front cover;3, support bearing;4, bearing support seat;5, front flange;6, sealing compression cover;7, sealing support sleeve;8, pump body;9, isolation plate;10, rotor sleeve;11, upper cover;12, pressure relief groove;13, magnetic suspension bearing;14, rear flange;15, rear cover;16, fixed screw. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0018] Please refer to Figs. 1-2 In the embodiments of the utility model, an eccentric oil-gas mixed conveying pump supported by magnetic suspension bearings comprises a pump body 8 and magnetic suspension bearings 13, the inside of the pump body 8 is provided with an eccentric shaft 1, the peripheral sides of the eccentric shaft 1 at the eccentric position in the middle are each provided with a rear flange 14, the magnetic suspension bearings 13 are installed between the rear flanges 14, a rotor sleeve 10 is arranged between the peripheral side of the eccentric shaft 1 and the magnetic suspension bearings 13, the rotor sleeve 10 on the magnetic suspension bearings 13 and the pump body 8 form a crescent cavity, an isolation plate 9 is arranged at the top of the pump body 8, the isolation plate 9 is connected with the rotor sleeve 10 through the square groove of the pump body 8, the medium cavity in the pump body 8 is divided into a high-pressure cavity and a low-pressure cavity, an upper cover 11 is arranged on the pump body 8, the upper cover 11 separates the medium cavity from the outside, when the rotor sleeve 10 moves, the isolation plate 9, the rotor sleeve 10 and the pump body 8 are sealed, the isolation plate 9 is provided with a pressure relief groove 12, the pressure relief groove 12 faces the inlet end during installation, when a certain pressure is formed at the inlet and outlet of the pump body 8, the medium at the outlet end flows back to the inlet end through the pressure relief groove 12 at the top of the pump body 8.

[0019] By adopting the above technical scheme, the magnetic suspension bearings 13 are arranged for supporting the rotor sleeve 10, there is no contact, friction, wear and lubrication, the design that the supporting bearings 3 are completely separated from the medium cavity is adopted, the eccentric rotor is arranged in the inside of the pump body 8, the magnetic suspension bearings 13 are installed in the eccentric rotor for supporting and transmitting on the shaft, the rotor forms a crescent cavity in the inside of the pump body 8, the isolation plate 9 is arranged through the shell and the rotating eccentric rotor to become a sealing body, the low-pressure cavity and the high-pressure cavity are formed; the eccentric rotor and the shell form a sealing body along the circumferential direction, the internal leakage of the low-pressure cavity and the high-pressure cavity is avoided, the mechanical structure is simple, the principle is correct, the manufacture is easy, the maintenance is easy, the running speed is controllable, noiseless and pollution-free, the pump can be used in harsh environment for a long time, and the service life is long.

[0020] The front flange 5 and the rear flange 14 are arranged on the extension end of the eccentric shaft 1 on the opposite sides of the pump body 8, and the two ends of the rotor sleeve 10 are both left with a movable gap between the front flange 5 and the rear flange 14, so that the rotor sleeve 10 can rotate flexibly and does not rub against the front flange 5 and the rear flange 14.

[0021] The rotating part of the eccentric shaft 1 on the inner wall of the front flange 5 and the rear flange 14 is provided with a sealing support sleeve 7 and a sealing compression cover 6 for providing rotary sealing, so that the medium cavity with pressure is isolated from the outside, and the internal crescent cavity can be ensured to be sealed when the eccentric shaft 1 rotates.

[0022] The front flange 5 and the rear flange 14 are provided with bearing support seats 4 at the ends away from each other, and the bearing support seats 4 are internally provided with support bearings 3 between the support bearings 3 and the eccentric shaft 1, and the support bearings 3 are separately provided with the medium cavity, so that when the sealing support sleeve 7 fails or has a problem, the medium cannot contaminate the support bearings 3.

[0023] The bearing support seats 4 on one side of the front flange 5 and the rear flange 14 are respectively provided with a front cover 2 and a rear cover 15, and the front cover 2 and the rear cover 15 are connected with the rear cover 15 through fixing screws 16, so that the front cover 2 and the rear cover 15 can be installed and fixed.

[0024] The pump body 8 is provided with inlet pipes and outlet pipes on both sides above the pump body 8 for sequentially connecting the crescent cavities with the outside.

[0025] The working principle of the utility model is as follows: in use, the external power motor is connected with the eccentric shaft 1 through a shaft coupling, then the external power motor drives the eccentric shaft 1 to rotate, and then the eccentric shaft 1 can be driven to rotate synchronously with the rotor sleeve 10 under the support of the support bearings 3, because a crescent cavity is formed between the rotor sleeve 10 and the cavity in the pump body 8, the crescent cavity rotates in the rotating process, a negative pressure adsorption force is formed, and the suction force of the pump body 8 is provided, when a certain pressure is formed at the inlet and outlet of the pump body 8, the medium at the outlet end enters the top of the pump body 8 and flows back to the inlet end through the pressure relief groove 12, the magnetic suspension bearing 13 is arranged for supporting the rotor sleeve 10, no contact, no friction, no wear, no lubrication is needed, the support bearings 3 are completely separated from the medium cavity, the eccentric rotor is arranged in the pump body 8, the magnetic suspension bearing 13 is arranged in the eccentric rotor and is supported on the shaft for transmission, the rotor forms the crescent cavity in the pump body 8, the isolation plate 9 passes through the shell and contacts the rotating eccentric rotor to become a sealing body, a low-pressure cavity and a high-pressure cavity are formed, the eccentric rotor is formed into a sealing body along the circumferential direction with the shell, the internal leakage of the low-pressure cavity and the high-pressure cavity is avoided, the mechanical structure is simple, the principle is correct, the utility model is easy to manufacture and maintain, the running speed is controllable, noiseless and pollution-free, the utility model can be used in harsh environments for a long time and has a long service life.

[0026] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A mixed oil and gas delivery pump of the eccentric type supported by magnetic bearings, comprising a pump body (8) and magnetic bearings (13), characterized in that: The eccentric shaft (1) is arranged inside the pump body (8), the peripheral sides of the eccentric position of the middle part of the eccentric shaft (1) are respectively provided with rear flanges (14), the magnetic suspension bearing (13) is installed between the rear flanges (14), the rotor sleeve (10) is arranged on the peripheral side of the eccentric shaft (1) and located on the magnetic suspension bearing (13), the rotor sleeve (10) and the pump body (8) form a crescent cavity, the isolation plate (9) is arranged at the top of the pump body (8), the isolation plate (9) is connected with the rotor sleeve (10) through the square groove of the pump body (8), the medium cavity inside the pump body (8) is divided into a high-pressure cavity and a low-pressure cavity, the upper cover (11) is arranged on the pump body (8), the upper cover (11) isolates the medium cavity from the outside, when the rotor sleeve (10) moves, the isolation plate (9) realizes sealing between the rotor sleeve (10) and the pump body (8), the relief groove (12) is arranged on the isolation plate (9), and the relief groove (12) faces the inlet end during installation.

2. The mixed oil and gas delivery pump supported by magnetic levitation bearing as claimed in claim 1, wherein: The front flange (5) is arranged on one side of the pump body (8) and located at the extension end of the eccentric shaft (1), the rear flange (14) is arranged on the other side of the pump body (8) and located at the extension end of the eccentric shaft (1), and the front flange (5) and the rear flange (14) are provided with a movable gap between the two ends of the rotor sleeve (10).

3. The mixed flow pump supported by magnetic bearing according to claim 2, characterized in that: The sealing support sleeve (7) and the sealing compression cover (6) are arranged on the inner wall of the front flange (5) and the rear flange (14) and the rotating part of the eccentric shaft (1) to provide rotary sealing.

4. The mixed flow pump supported by magnetic bearing according to claim 3, characterized in that: The bearing support seat (4) is arranged at the end of the front flange (5) and the rear flange (14) away from each other, the support bearing (3) is installed between the inside of the bearing support seat (4) and the eccentric shaft (1), and the support bearing (3) is separately arranged with the medium cavity.

5. The mixed flow pump supported by magnetic bearing according to claim 4, characterized in that: The front cover (2) and the rear cover (15) are respectively arranged on one side of the bearing support seat (4) of the front flange (5) and the rear flange (14), and the front cover (2) and the rear cover (15) are connected through the fixing screw (16).

6. The mixed flow pump supported by magnetic bearing according to claim 1, characterized in that: The inlet pipe and the outlet pipe are arranged on the two sides of the upper part of the pump body (8) to sequentially communicate the crescent cavity with the outside.

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