Submersible motor with centrifugal dustproof bearing protection function

Abstract

A submersible motor with a centrifugal dustproof bearing protection function relates to the technical field of submersible motors and comprises a motor rotor, a bearing is fixedly connected to the lower end of the motor rotor, the bearing is rotatably sleeved in a bearing seat, a sand throwing ring located above the bearing is fixedly connected to the motor rotor, and an oil throwing channel is arranged between the lower surface of the sand throwing ring and the upper surface of the bearing. A spiral groove communicated with the oil throwing channel is formed in the inner ring of the bearing. According to the utility model, the problems that in the prior art, abraded metal particles are relatively large in specific gravity and are gradually deposited to the bottommost part of the motor after the motor is shut down, and even deposited in a gap of a bearing at the bottommost part of the motor, so that the abrasion of the bearing at the bottommost part is aggravated, the service life of the bearing is shortened or the bearing is damaged, and the motor fails are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to submersible motor technical field, specifically related to submersible motor with centrifugal dustproof bearing protection function. BACKGROUND

[0002] Generally, the submersible motor is vertically worked in the oil well, the motor is long and slender structure with large length-diameter ratio, the inside is full of lubricating oil, the motor adopts the bearing combination mode of multistage bearing to bear the radial force, in the motor operation process, the relative wear exists between the wear metal particles of the bearing pair, and the wear metal particles are easy to fall off.

[0003] The prior art discloses a patent CN205064357U, the scheme is installed with mechanical seal between the radial direction of the joint on the protector and the shaft, the shaft is axially fixed with the mechanical seal on the shaft with the shaft baffle I, the sandproof sealing device is installed on the shaft above the mechanical seal, the sealing device, the rotating sleeve are installed in the inner hole of the upper end of the shell of the sandproof sealing device, the rotating inner sleeve is installed in the inner hole of the sealing device, the rotating inner sleeve is installed on the shaft through the key, the sandproof sealing device is axially fixed with the shaft baffle II installed on the shaft, and the end face of the stepped inner hole of the upper joint is contacted with the lower end face of the shell.The beneficial effect is that the structure is reasonable, the mechanical seal of the protector can be effectively protected, the sand and other foreign matters in the well are prevented from entering, and the service life of the protector is prolonged.

[0004] With the use of the existing device including the above patent, the deficiencies of the technology are gradually exposed, mainly in the following aspects:

[0005] The wear metal particles have large specific gravity, gradually deposit to the bottom of the motor after the motor stops, even deposit to the gap of the bottom bearing of the motor, cause the wear of the bottom bearing to aggravate, cause the service life of the bearing to shorten or damage, until the motor failure is caused.

[0006] From the above, it is obvious that the prior art has inconvenience and defects in actual use, so it is necessary to improve. INVENTION CONTENTS

[0007] In view of the defects in the prior art, the utility model solves the problem that the wear metal particles have large specific gravity, gradually deposit to the bottom of the motor after the motor stops, even deposit to the gap of the bottom bearing of the motor, cause the wear of the bottom bearing to aggravate, cause the service life of the bearing to shorten or damage, until the motor failure is caused.

[0008] In order to solve the above problems, the utility model provides the following technical scheme:

[0009] The utility model discloses a centrifugal dustproof bearing protection function's submersible motor, including motor rotor, the lower end of motor rotor is fixedly connected with bearing, bearing rotation is sleeved in bearing seat, the sand ring of throwing of motor rotor is fixedly connected above bearing, the lower surface of sand ring of throwing is equipped with the oil throwing channel between the upper surface of bearing, and the inner ring of bearing is equipped with the spiral groove of the oil throwing channel intercommunication.

[0010] As an optimized scheme, the sand ring of throwing includes a ring body, a guide sleeve section is vertically downward arranged at the outer edge of the ring body, and an oil outlet channel is formed between the guide sleeve section and the outer wall of the bearing seat, and the oil outlet channel is communicated with the oil throwing channel.

[0011] As an optimized scheme, a plurality of oil inlet ports are arranged around the bearing seat and communicated with the inner cavity of the bearing.

[0012] As an optimized scheme, a filter sleeve is sleeved on the outer wall of the bearing seat and covers the oil inlet ports.

[0013] As an optimized scheme, a key is fixed on the outer wall of the motor rotor, and a key groove matched with the key is formed in the inner ring of the sand ring of throwing.

[0014] As an optimized scheme, a retaining ring groove is arranged on the motor rotor, a shaft retaining ring is clamped in the retaining ring groove, and the upper surface of the shaft retaining ring is abutted against the lower surface of the sand ring of throwing.

[0015] As an optimized scheme, the lower end of the bearing seat is fixedly connected with the motor shell.

[0016] As an optimized scheme, a limiting groove is formed in the motor shell and abutted against the lower end of the bearing seat, and the lower end of the filter sleeve is abutted in the limiting groove.

[0017] As an optimized scheme, a limiting ring is sleeved on the outer wall of the bearing seat close to the upper end, and the upper end of the filter sleeve is abutted against the lower surface of the limiting ring.

[0018] As an optimized scheme, a retaining ring is clamped on the outer ring of the bearing seat, and the lower surface of the retaining ring is abutted against the upper surface of the limiting ring.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The motor housing is filled with lubricating oil, and a sand throwing ring is added on the upper end of the bottom bearing of the motor, when the motor works and rotates, the sand throwing ring is driven to rotate, centrifugal force is generated, under the action of the centrifugal force, the particles in the medium are thrown away from the bearing, and the particles are prevented from entering the gap of the bearing; meanwhile, when the sand throwing ring rotates, a negative pressure area is formed between the sand throwing ring and the bearing, the flow of the lubricating oil can be accelerated, and the lubricating effect of the bearing is enhanced.

[0021] The oil inlet is provided with an oil filter sleeve for filtering the particles in the lubricating oil, the bearing is provided with a spiral groove, and when the rotor shaft rotates, the lubricating oil is driven to flow along the spiral groove due to the friction force, and the flow of the lubricating oil in the bearing is accelerated under the action of the negative pressure area caused by the rotation of the sand throwing ring, so that the lubricating condition of the bearing is more optimized, the service life of the bearing is ensured, and the use quality of the motor is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally indicated by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0023] Figure 1 is a structural schematic diagram of the present application.

[0024] In the drawings: 1-motor rotor; 2-motor housing; 3-bearing seat; 4-bearing; 5-oil filter sleeve; 6-oil inlet; 7-sand throwing ring; 8-oil throwing channel; 9-oil outlet channel; 10-spiral groove; 11-key; 12-axle retainer; 13-limiting ring; 14-retainer. DETAILED DESCRIPTION

[0025] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0026] As shown in Figure 1 The submersible motor with centrifugal dustproof bearing protection function comprises a motor rotor 1, a bearing 4 is fixedly connected to the lower end of the motor rotor 1, the bearing 4 is rotatably sleeved in a bearing seat 3, a sand throwing ring 7 is fixedly connected to the motor rotor 1 and located above the bearing 4, an oil throwing channel 8 is arranged between the lower surface of the sand throwing ring 7 and the upper surface of the bearing 4, and a spiral groove 10 is arranged on the inner ring of the bearing 4 and communicates with the oil throwing channel 8.

[0027] The sand throwing ring 7 comprises a ring body, a guide sleeve section is vertically arranged on the outer edge of the ring body downward, and an oil outlet channel 9 is formed between the guide sleeve section and the outer wall of the bearing seat 3, and the oil outlet channel 9 is communicated with the oil throwing channel 8.

[0028] A plurality of oil inlet ports 6 are arranged around the bearing seat 3 and communicated with the inner cavity of the bearing 4.

[0029] The oil filter sleeve 5 is sleeved on the outer wall of the bearing seat 3 and covers the oil inlet port 6.

[0030] The key 11 is fixed on the outer wall of the motor rotor 1, and the key 11 groove is arranged on the inner ring of the sand throwing ring 7 and matched with the key 11.

[0031] The shaft retaining ring 12 is clamped in the retaining ring 14 groove arranged on the motor rotor 1, and the upper surface of the shaft retaining ring 12 is abutted with the lower surface of the sand throwing ring 7.

[0032] The lower end of the bearing seat 3 is fixed with the motor housing 2.

[0033] The limiting groove is arranged on the motor housing 2 and abutted with the lower end of the bearing seat 3, and the lower end of the oil filter sleeve 5 is abutted in the limiting groove.

[0034] The limiting ring 13 is sleeved on the outer wall of the bearing seat 3 close to the upper end, and the upper end of the oil filter sleeve 5 is abutted with the lower surface of the limiting ring 13.

[0035] The retaining ring 14 is clamped on the outer ring of the bearing seat 3, and the lower surface of the retaining ring 14 is abutted with the upper surface of the limiting ring 13.

[0036] The working principle of the device is as follows:

[0037] The motor housing 2 is filled with lubricating oil, the sand throwing ring 7 is arranged on the upper end of the bearing 4 at the bottom of the motor, the sand throwing ring 7 is rotated when the motor works, the centrifugal force is generated, the particles in the medium are thrown away from the bearing 4 under the action of the centrifugal force, and the particles are prevented from entering the gap of the bearing 4; at the same time, the negative pressure area is formed between the sand throwing ring 7 and the bearing 4 when the sand throwing ring 7 rotates, the flow of the lubricating oil is accelerated, and the lubrication effect of the bearing 4 is strengthened.

[0038] The particles impurities in the lubricating oil are filtered by the oil filter sleeve 5 at the oil inlet port 6, the bearing 4 is provided with the spiral groove 10, the lubricating oil is driven to flow along the spiral groove 10 due to the friction force when the rotor shaft rotates, and the flow of the lubricating oil in the bearing 4 is accelerated under the action of the negative pressure area caused by the rotation of the sand throwing ring 7, so that the lubrication condition of the bearing 4 is more optimized, the service life of the bearing 4 is guaranteed, and the use quality of the motor is more reliable.

[0039] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A submersible motor having a centrifugal dustproof bearing protection function, characterized in that: The application relates to a motor rotor (1), the lower end of which is fixedly connected with a bearing (4) which is rotatably sleeved in a bearing seat (3), a sand throwing ring (7) is fixedly connected on the motor rotor (1) above the bearing (4), an oil throwing channel (8) is arranged between the lower surface of the sand throwing ring (7) and the upper surface of the bearing (4), and a spiral groove (10) which is connected with the oil throwing channel (8) is arranged on the inner ring of the bearing (4).

2. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 1, characterized in that: The sand throwing ring (7) comprises a ring body, a guide sleeve section is vertically arranged on the outer edge of the ring body downwards, and an oil outlet channel (9) is formed between the guide sleeve section and the outer wall of the bearing seat (3), and the oil outlet channel (9) is connected with the oil throwing channel (8).

3. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 1, characterized in that: A plurality of oil inlets (6) which are connected with the inner cavities of the bearings (4) are arranged around the bearing seat (3).

4. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 3, characterized in that: The outer wall of the bearing seat (3) is sleeved with an oil filter sleeve (5) which covers the oil inlets (6).

5. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 1, characterized in that: The outer wall of the motor rotor (1) is fixedly connected with a key (11), and the inner ring of the sand throwing ring (7) is provided with a key (11) groove which is matched with the key (11).

6. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 5, characterized in that: The motor rotor (1) is provided with a shaft retainer ring (12) which is clamped in a retainer ring (14) groove, and the upper surface of the shaft retainer ring (12) abuts against the lower surface of the sand throwing ring (7).

7. The electric submersible motor with a centrifugal dust-proof bearing protection function according to claim 4, characterized in that: The lower end of the bearing seat (3) is fixedly connected with a motor shell (2).

8. The electric submersible motor with a centrifugal dust-proof bearing protection function according to claim 7, characterized in that: The motor shell (2) is provided with a limiting groove which abuts against the lower end of the bearing seat (3), and the lower end of the oil filter sleeve (5) abuts against the limiting groove.

9. The electric submersible motor having a centrifugal dust-proof bearing protection function according to claim 4, characterized in that: The outer wall of the bearing seat (3) is sleeved with a limiting ring (13) near the upper end, and the upper end of the oil filter sleeve (5) abuts against the lower surface of the limiting ring (13).

10. The electric submersible motor with a centrifugal dust-proof bearing protection function according to claim 9, characterized in that: The outer ring of the bearing seat (3) is clamped with a retainer ring (14), and the lower surface of the retainer ring (14) abuts against the upper surface of the limiting ring (13).

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