Motor of deep-well pump

Abstract

The invention provides a motor of a deep-well pump, and belongs to the technical field of deep-well pumps. The problem that an existing deep-well pump is poor in stability is solved. The motor of the deep-well pump comprises a machine barrel, an oil cup, a stator fixedly connected in the machine barrel, an upper bearing seat, a lower bearing seat and a rotor arranged in the stator in a penetrating mode, the two ends of the rotor are connected with the upper bearing seat and the lower bearing seat respectively, the machine barrel is in a straight barrel shape, the cross section of the lower bearing seat is in an I shape, and the outer circumferential wall of the lower bearing seat is tightly attached to the inner circumferential wall of the machine barrel. An annular supporting ring is fixedly connected to the bottom of the machine barrel in a sealed welding mode, the top of the lower bearing seat abuts against the stator, the bottom of the lower bearing seat abuts against the supporting ring, the open end of the oil cup is fixedly connected with the supporting ring in a sealed mode, and the oil cup is located in the lower bearing seat and the supporting ring. The motor of the deep-well pump has the advantage of improving the stability of the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of deep well pumps and relates to a motor of a deep well pump. Background Art

[0002] The biggest feature of the deep well pump is that the motor and the pump are made into one body. It is a kind of pump immersed in the groundwater well to suck and transport water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment.

[0003] Existing deep well pumps, for example, Chinese patent literature discloses a high-lift multi-stage deep well submersible pump [patent number: 201620872351.6; application publication number: CN205895628U], which includes a pump body, a motor and a barrel. An oil cup is provided at the bottom of the barrel, and the oil cup is fixed by a retaining ring. The motor is provided above the barrel, and the pump body is provided on the motor. The pump body includes a pump head, an upper end, a connecting part and a lower end. A transmission shaft passing through the upper end, the connecting part and the lower end is provided in the pump body. Several groups of impeller assemblies are respectively provided at the upper end and the lower end, and the number of impeller assemblies at the upper end is greater than the number of impeller assemblies at the lower end. A bracket is provided in the connecting part, and a shaft sleeve matching the transmission shaft is provided on the bracket.

[0004] The submersible pump of this structure has a circle of inwardly contracted pump ribs on the barrel. The pump ribs are formed by spinning process, which is inconvenient to process. In addition, when processing the pump ribs, there is a problem of causing a certain deformation of the barrel, resulting in a certain deviation in the arrangement of parts in the barrel, reducing the stability of the motor. At the same time, when the working rotor of the motor rotates, an axial force is generated, which is transmitted to the pump ribs through the bearing seat. The pump ribs are at a position where the strength of the barrel is relatively weak. After a period of use, the pump ribs have deformation problems, resulting in the pump ribs not being able to support the bearing seat well, causing vibration problems when the motor is running, reducing the stability of the motor. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to propose a motor for a deep well pump, the technical problem to be solved is how to improve the stability of the motor.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A motor for a deep well pump, comprising a barrel, an oil cup, a stator fixedly connected to the barrel, an upper bearing seat and a lower bearing seat, and a rotor inserted in the stator, the two ends of the rotor being respectively connected to the upper bearing seat and the lower bearing seat, and characterized in that the barrel is in the shape of a straight cylinder, the cross-section of the lower bearing seat is in the shape of an I, the outer peripheral wall of the lower bearing seat is tightly fitted with the inner peripheral wall of the barrel, the bottom of the barrel is sealed and welded with an annular support ring, the top of the lower bearing seat abuts against the stator, and the bottom abuts against the support ring, the open end of the oil cup is sealed and fixedly connected to the support ring, and the oil cup is located in the lower bearing seat and the support ring.

[0007] The rotation of the working rotor of the motor will generate an axial force on the lower bearing seat, which is then transmitted to the support ring. Since the support ring and the barrel are fixedly connected by welding, the axial force is transmitted to the barrel, which can effectively unload the axial force, reduce the noise and vibration of the motor, and thus improve the stability of the motor. The barrel is in the shape of a straight cylinder, and there are no inward-retracted pump ribs, which makes the overall strength of the barrel high and the overall shape of the barrel high in precision, so that the position of the parts in the barrel can be installed in place, the installation accuracy is improved, and thus the stability of the motor is improved. The outer peripheral wall of the lower bearing seat is tightly fitted with the inner peripheral wall of the barrel, which can improve the strength of the barrel, and at the same time, the lower bearing seat and the barrel can share various forces such as axial force and pressure, thereby improving the stability of the motor. During installation, first weld the support ring to the bottom of the barrel, then press the lower bearing seat from the top of the barrel and abut against the support ring, and then press the stator from the top of the barrel and abut against the lower bearing seat, so that the lower bearing seat and stator can be installed in place, improve the installation accuracy of each component in the barrel, and thus improve the stability of the motor. The barrel and the support ring are sealed and fixed by welding, and the sealing effect is better than that of the sealing ring. The oil cup is located in the lower bearing seat and the support ring, so that the pressure inside and outside the barrel is consistent, thereby improving the stability of the motor.

[0008] In the above-mentioned motor of a deep well pump, the lower bearing seat includes a support tube and a support member fixedly connected in the middle of the support tube, the bottom of the rotor is inserted into the support member, and a lower bearing is arranged between the bottom of the rotor and the support member, and the circumferential edge of the support member has a plurality of through holes extending axially through the support tube. The support tube is used to fit tightly with the barrel, and the two ends of the support tube are respectively against the support ring and the stator, and the support member is used to support the rotor. The through holes are arranged so that when the oil cup is deformed, the oil on the upper and lower sides of the lower bearing seat in the barrel can flow, so as to keep the pressure inside and outside the barrel consistent and improve the stability of the motor.

[0009] In the above-mentioned motor of a deep well pump, the support member includes a support plate and a support sleeve fixedly connected to one side of the support plate, the support plate and the support sleeve are coaxially arranged, the circumferential edge of the support plate is sealed and fixedly connected to the middle of the support tube, the outer wall of the support sleeve is fixedly connected to the support tube through a plurality of support arms arranged at intervals, and the support arms are fitted and fixedly connected to the support plate, and the circumferential edge of the support plate has a plurality of through holes, and the through holes are located between two adjacent support arms. This structure improves the firmness of the connection between the support member and the support tube, improves the strength of the support member, enables the support member to better support the rotor, and improves the stability of the motor; the oil cup occupies more space at the bottom of the support tube, and the through holes are located on the best path for the flow of oil, which can enable the oil on both sides of the support member to flow in time, keep the pressure inside and outside the barrel consistent, and the flow of oil reduces the impact on the rotation of the rotor, thereby improving the stability of the motor.

[0010] In the above-mentioned motor of a deep well pump, the number of the through holes is half the number of the support arms. This structure ensures that the support has sufficient strength while allowing the oil in the barrel to flow smoothly, making the pressure inside and outside the barrel consistent, preventing the oil cup from being damaged, and thus improving the stability of the motor.

[0011] In the above-mentioned motor of a deep well pump, the support tube and the support member are an integrated structure. The integrated structure is easy to process and has a high degree of firmness, which makes the stability of the lower bearing seat good, thereby improving the stability of the motor.

[0012] In the above-mentioned motor of a deep well pump, there is a certain distance between the oil cup and the lower bearing seat. The space is filled with oil, and the oil cup does not contact the lower bearing seat, so that the oil cup is not easily damaged, thereby improving the stability of the motor.

[0013] In the above-mentioned motor of a deep well pump, the outer peripheral wall of the support ring has a step surface, the top of the support ring is tightly inserted into the barrel, the end surface of the bottom of the barrel abuts against the step surface, and the step surface and the end surface of the bottom of the barrel are sealed and welded at the connection. This structure improves the firmness and sealing of the support ring and the barrel, and makes the external structure of the motor flat.

[0014] In the above-mentioned motor of a deep well pump, the outer circumferential side of the opening end of the oil cup has a reinforcing wall, the reinforcing wall has a positioning groove that is recessed inward in an annular shape, the inner side wall of the support ring has a positioning strip that is protruding outward in an annular shape, a cup cover is arranged in the opening end of the oil cup so that the positioning strip is embedded and positioned in the positioning groove, and the cup cover is positioned by a retaining spring that is embedded in the support ring and presses the cup cover to position the cup cover, thereby positioning the oil cup in the lower bearing seat and the support ring. This structure improves the firmness of the oil cup connection and improves the sealing between the oil cup and the support ring.

[0015] In the above-mentioned motor of a deep well pump, the upper bearing seat is inserted through the top of the barrel, and a plurality of spaced fasteners are inserted through the barrel in the radial direction of the barrel and inserted into the upper bearing seat, so that the upper bearing seat is fixedly connected to the barrel, the top of the rotor is inserted into the upper bearing seat, and an upper bearing is provided between the top of the rotor and the upper bearing seat. This structure makes the upper bearing seat firmly connected.

[0016] In the above-mentioned motor of a deep well pump, the bottom of the support ring is fixedly connected with a ring-shaped support seat by a fastener. The setting of the support seat enables the motor to be placed upright.

[0017] Compared with the prior art, the motor of a deep well pump provided by the present invention has the following advantages:

[0018] 1. The support ring of the motor is welded and sealed to the barrel. The bottom end of the lower bearing seat is against the support ring, the top end is used to support the stator, and the middle part is used to support the rotor. The axial force generated by the stator and the rotor is transmitted to the barrel through the lower bearing seat and the support ring, which can effectively unload the axial force, reduce the noise and vibration of the motor, and thus improve the stability of the motor.

[0019] 2. The support ring of the motor is welded and fixedly connected to the barrel seal, and the oil cup and the support ring are tightly fitted and sealed. Compared with the use of sealing rings, the sealing effect is better and the oil cup will not explode, thereby improving the stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the overall structure of the motor.

[0021] Figure 2 It is a connection diagram of the lower bearing seat, support ring and barrel of this motor.

[0022] Figure 3 It is a schematic diagram of the overall structure of the lower bearing seat of the motor.

[0023] Figure 4 This motor Figure 1 Magnified image of area A.

[0024] In the figure, 1. barrel; 2. oil cup; 21. reinforcing wall; 211. positioning groove; 3. stator; 4. upper bearing seat; 5. lower bearing seat; 51. support cylinder; 52. support member; 521. through hole; 522. support plate; 523. support sleeve; 524. support arm; 6. rotor; 7. support ring; 71. step surface; 72. positioning strip; 8. lower bearing; 9. cup cover; 10. retaining ring; 11. upper bearing; 12. support seat. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1 As shown, the motor of the deep well pump includes a barrel 1, an oil cup 2, a stator 3, an upper bearing seat 4, a lower bearing seat 5, a rotor 6, a support ring 7, a lower bearing 8, a cup cover 9, a retaining ring 10, an upper bearing 11 and a support seat 12.

[0027] like Figure 2 , Figure 3 As shown, the lower bearing seat 5 includes a support tube 51 and a support member 52 fixedly connected to the middle of the support tube 51. The support tube 51 and the support member 52 are an integrated structure, and the cross section of the lower bearing seat 5 is in an I-shape. The support member 52 includes a support plate 522 and a support sleeve 523 fixedly connected to one side of the support plate 522. The support plate 522 and the support sleeve 523 are coaxially arranged. The circumferential edge of the support plate 522 is sealed and fixedly connected to the middle of the support tube 51. The outer side wall of the support sleeve 523 is fixedly connected to the support tube 51 through a support arm 524 arranged at intervals, and the support arm 524 is fixedly connected to the support plate 522 in a close fit. The circumferential edge of the support plate 522 has a through hole 521, which is located between two adjacent support arms 524, and the number of the through holes 521 is half the number of the support arms 524. In this embodiment, the number of support arms 524 is eight, and the number of through holes 521 is four. In actual production, the number of support arms 524 is six or twelve, and the number of through holes 521 is three or six. The barrel 1 is in a straight cylindrical shape, and the outer peripheral wall of the support barrel 51 is closely fitted with the inner peripheral wall of the barrel 1.

[0028] The support ring 7 is annular, and has a step surface 71 on its outer peripheral wall. The top of the support ring 7 is inserted into the barrel 1 in a tightly fitting manner, and the end surface of the bottom of the barrel 1 abuts against the step surface 71, and is sealed and welded at the connection between the step surface 71 and the end surface of the bottom of the barrel 1. The stator 3 is fixedly connected to the barrel 1 in a tightly fitting manner, and the top of the support cylinder 51 abuts against the stator 3, and the bottom abuts against the support ring 7.

[0029] The upper bearing seat 4 is penetrated at the top of the barrel 1, and the upper bearing seat 4 is fixedly connected to the barrel 1 by fasteners such as bolts arranged at intervals, which pass through the barrel 1 in the radial direction of the barrel 1 and penetrate into the upper bearing seat 4. The rotor 6 is penetrated in the stator 3, the top of the rotor 6 is penetrated in the upper bearing seat 4, and an upper bearing 11 is provided between the top of the rotor 6 and the upper bearing seat 4, and the bottom of the rotor 6 is penetrated in the support 52, and a lower bearing 8 is provided between the bottom of the rotor 6 and the support 52.

[0030] The outer side of the opening end of the oil cup 2 is provided with a reinforcing wall 21, and the reinforcing wall 21 is provided with a positioning groove 211 which is recessed inward in an annular shape. The inner side wall of the support ring 7 is provided with a positioning strip 72 which is protruded outward in an annular shape. A cup cover 9 is provided in the opening end of the oil cup 2 so that the positioning strip 72 is embedded and positioned in the positioning groove 211. The retaining spring 10 is embedded in the support ring 7 and presses the cup cover 9 to position the cup cover 9, so that the oil cup 2 is positioned in the lower bearing seat 5 and the support ring 7, and there is a certain distance between the oil cup 2 and the lower bearing seat 5. The bottom of the support ring 7 is fixedly connected with an annular support seat 12 by fasteners such as bolts.

[0031] During assembly, the support ring 7 is welded and fixed first, and then the lower bearing seat 5 is installed so that the lower bearing seat 5 abuts against the support ring 7 , and then the stator 3 is installed so that the stator 3 abuts against the lower bearing seat 5 .

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0033] Although the present invention uses more terms such as barrel 1, oil cup 2, reinforcing wall 21, positioning groove 211, stator 3, upper bearing seat 4, lower bearing seat 5, support cylinder 51, support member 52, through hole 521, support plate 522, support sleeve 523, support arm 524, rotor 6, support ring 7, step surface 71, positioning bar 72, lower bearing 8, cup cover 9, retaining ring 10, upper bearing 11, support seat 12, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A motor for a deep well pump, comprising a barrel (1), an oil cup (2), a stator (3) fixedly connected to the barrel (1), an upper bearing seat (4) and a lower bearing seat (5), and a rotor (6) inserted into the stator (3), wherein two ends of the rotor (6) are respectively connected to the upper bearing seat (4) and the lower bearing seat (5), and characterized in that: The barrel (1) is in the shape of a straight cylinder, the cross section of the lower bearing seat (5) is in the shape of an I, the outer peripheral wall of the lower bearing seat (5) is tightly fitted with the inner peripheral wall of the barrel (1), the bottom of the barrel (1) is sealed and welded with an annular support ring (7), the top of the lower bearing seat (5) abuts against the stator (3), and the bottom abuts against the support ring (7), the open end of the oil cup (2) is sealed and fixedly connected to the support ring (7), and the oil cup (2) is located between the lower bearing seat (5) and the support ring (7).

2. A motor for a deep well pump according to claim 1, characterized in that: The lower bearing seat (5) comprises a support tube (51) and a support member (52) fixedly connected to the middle of the support tube (51); the bottom of the rotor (6) is inserted into the support member (52); a lower bearing (8) is arranged between the bottom of the rotor (6) and the support member (52); and a plurality of through holes (521) are provided at the circumferential edge of the support member (52) and penetrate axially along the support tube (51).

3. A motor for a deep well pump according to claim 2, characterized in that: The support member (52) comprises a support plate (522) and a support sleeve (523) fixedly connected to one side of the support plate (522); the support plate (522) and the support sleeve (523) are coaxially arranged; the circumferential edge of the support plate (522) is sealed and fixedly connected to the middle of the support tube (51); the outer wall of the support sleeve (523) is fixedly connected to the support tube (51) via a plurality of support arms (524) arranged at intervals; and the support arms (524) are fitted and fixedly connected to the support plate (522); a plurality of through holes (521) are provided at the circumferential edge of the support plate (522); and the through hole (521) is located between two adjacent support arms (524).

4. A motor for a deep well pump according to claim 3, characterized in that: The number of the through holes (521) is half the number of the support arms (524).

5. A motor for a deep well pump according to claim 2, 3 or 4, characterized in that: The support tube (51) and the support member (52) are an integrated structure.

6. A motor for a deep well pump according to claim 1, 2, 3 or 4, characterized in that: There is a certain distance between the oil cup (2) and the lower bearing seat (5).

7. A motor for a deep well pump according to claim 1, 2, 3 or 4, characterized in that: The support ring (7) has a step surface (71) on its outer peripheral wall, the top of the support ring (7) is tightly inserted into the barrel (1), the end surface of the bottom of the barrel (1) abuts against the step surface (71), and the step surface (71) and the end surface of the bottom of the barrel (1) are sealed and welded together.

8. A motor for a deep well pump according to claim 1, 2, 3 or 4, characterized in that: The outer circumferential side of the opening end of the oil cup (2) is provided with a reinforcing wall (21), the reinforcing wall (21) is provided with a positioning groove (211) which is recessed inwardly in an annular shape, the inner side wall of the support ring (7) is provided with a positioning strip (72) which is protruding outwardly in an annular shape, a cup cover (9) is provided in the opening end of the oil cup (2) so that the positioning strip (72) is embedded and positioned in the positioning groove (211), and a retaining spring (10) is embedded in the support ring (7) and presses the cup cover (9) so that the cup cover (9) is positioned, thereby positioning the oil cup (2) in the lower bearing seat (5) and the support ring (7).

9. A motor for a deep well pump according to claim 1, 2, 3 or 4, characterized in that: The upper bearing seat (4) is passed through the top of the barrel (1), and a plurality of fasteners arranged at intervals pass through the barrel (1) in the radial direction of the barrel (1) and are passed through the upper bearing seat (4), so that the upper bearing seat (4) is fixedly connected to the barrel (1); the top of the rotor (6) is passed through the upper bearing seat (4), and an upper bearing (11) is provided between the top of the rotor (6) and the upper bearing seat (4).

10. A motor for a deep well pump according to claim 1, 2, 3 or 4, characterized in that: The bottom of the support ring (7) is fixedly connected to a ring-shaped support seat (12) via a fastener.

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