Multi-stage sealing structure for brine deep-well pump motor

Abstract

The utility model relates to the technical field of deep-well pumps, and discloses a multistage sealing structure for a brine deep-well pump motor, which comprises a motor body, a rotary power output mechanism arranged in the middle of the motor body, an electrical transmission mechanism arranged on the front side of the motor body, and a load transmission mechanism arranged on the rear side of the middle of the motor body. The motor comprises a motor body, the rear end of the motor body is provided with a fixed heat dissipation mechanism, the front side of the motor body is provided with a bearing cover, the middle of the motor body is rotatably connected with a motor shaft, the exterior of the motor shaft is detachably connected with a first fixed steel ring, and the interior of the first fixed steel ring is detachably connected with a first rubber ring. According to the utility model, the sealing part is additionally arranged at the motor cover of the deep-well pump to form the protective layer, so that brine is prevented from permeating into the motor, the outside of the hydraulic plunger pump is protected, a part of energy of external impact force can be absorbed, and the influence on the sealing structure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep well pump technical field especially relates to a multistage sealing structure for brine deep well pump motor. BACKGROUND

[0002] Brine usually exists in the deep underground, and needs strong power to extract it to the ground. Deep well pump motor has high power and lift, and can meet the requirement of extracting brine from deep well. For example, in some chemical production, a large amount of brine is needed as raw material, and deep well pump motor can efficiently extract brine from the deep underground to meet the production requirement.

[0003] The biggest feature of deep well pump is that the motor and the pump are connected together, immersed in the underground water well to suck and transport water, which is widely used in farmland irrigation, industrial and mining enterprises, urban water supply and drainage and sewage treatment, etc. Since the motor is immersed in water at the same time, the structure of the motor is more special than general motors.

[0004] The existing brine deep well pump motor faces many problems in the use process. On the one hand, since brine has strong corrosiveness, it is easy to penetrate into the motor, damage the key components of the motor, such as mechanical seal, etc., thereby shortening the service life of the motor and affecting the stability and reliability of the system. On the other hand, if the brine deep well pump motor is subjected to external impact force in the working environment, it will cause damage to the motor and its sealing structure, and affect the normal operation of the equipment. Therefore, in view of the above problems, a multistage sealing structure for brine deep well pump motor is proposed to solve the above problems. Utility model content

[0005] In order to make up for the above shortcomings, the utility model provides a multistage sealing structure for brine deep well pump motor, which aims at improving the problem that the poor mechanical sealing of the brine deep well pump motor in the prior art leads to the penetration of brine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of brine deep well pump motor is with multistage sealing structure, including motor body, the middle part of the motor body is provided with rotating power output mechanism, the front side of the motor body is provided with electrical transmission mechanism, the rear side of the middle part of the motor body is provided with load transmission mechanism, the rear end of the motor body is provided with fixed heat dissipation mechanism, the front side of the motor body is provided with bearing cover, the middle part of the motor body is rotatably connected with motor shaft, the outer portion of the motor shaft is detachably connected with fixed steel ring one, the inner portion of the fixed steel ring one is detachably connected with rubber ring one, the outer portion of the motor shaft is detachably connected with fixed steel ring two, the inner portion of the fixed steel ring two is detachably connected with rubber ring two, the outer portion of two fixed steel ring one is equipped with limit spring, the front side of the motor body is detachably connected with sealing cover, the middle part of the sealing cover is detachably connected with main seal cover, the rear end of the main seal cover is provided with auxiliary seal cover, the outer portion of the bearing cover is detachably connected with installation sleeve, the front side of the installation sleeve is provided with protection assembly for protecting motor shaft;

[0008] As further description of the above technical solutions:

[0009] The protection assembly includes a limit ring, the rear side of the limit ring is fixedly connected to the front side of the installation sleeve, the outer portion of the limit ring is fixedly connected with a return spring, and the outer portion of the limit ring is slidably connected with a protective sleeve.

[0010] As further description of the above technical solutions:

[0011] The rotating power output mechanism includes a rotor, the rotor is arranged in the inner middle portion of the rotating power output mechanism, the outer portion of the rotor is provided with a stator winding, and the outer portion of the motor shaft is rotatably connected to the middle inner wall of the rotor.

[0012] As further description of the above technical solutions:

[0013] The electrical transmission mechanism includes a lead-out wire plug, the lead-out wire plug is arranged in the inner portion of the lead-out wire plug, the front side of the lead-out wire plug is fixedly connected with a plug-in cable, the outer portion of the motor shaft is rotatably connected to the middle portion of the electrical transmission mechanism, and the outer portion of the motor shaft is rotatably connected to the middle inner wall of the bearing cover.

[0014] As further description of the above technical solutions:

[0015] The load transmission mechanism includes a base bearing, the base bearing is arranged in the inner front side of the load transmission mechanism, the rear side middle portion of the load transmission mechanism is provided with a lower shaft base, and the rear end of the motor shaft is detachably connected to the middle portion of the lower shaft base.

[0016] As further description of the above technical solutions:

[0017] The fixed heat dissipation mechanism includes a stainless steel bottom cover fixedly connected to the rear side of the fixed heat dissipation mechanism, a flat clamp spring fixedly connected to the rear side of the stainless steel bottom cover, an oil bag fixedly connected to the front side of the stainless steel bottom cover, and a capacitor arranged in the middle of the front side of the fixed heat dissipation mechanism.

[0018] As a further description of the above technical solution:

[0019] The rear side of the second fixed steel ring is clamped with the front side of the first fixed steel ring, and the outer part of the first rubber ring is slidably connected to the outer part of the motor shaft.

[0020] As a further description of the above technical solution:

[0021] The middle inner wall of the main sealing sleeve is slidably connected to the outer part of the motor shaft, and the middle inner wall of the auxiliary sealing sleeve is slidably connected to the outer part of the motor shaft.

[0022] The utility model has the advantages of the following beneficial effects:

[0023] 1. In the utility model, the installation sleeve and the protective sleeve and other components wrap the outer part of the front bearing cover of the motor body; the first fixed steel ring is inserted into the outer part of the motor shaft in the middle part of the motor body; the first rubber ring is inserted into the gap between the first fixed steel ring and the motor shaft and is sleeved with the limiting spring; the second rubber ring and the second fixed steel ring are inserted and clamped; the sealing cover is clamped with the inner part of the front end of the bearing cover, the second fixed steel ring and the first fixed steel ring are compacted, the auxiliary sealing sleeve and the main sealing sleeve are inserted into the middle part of the sealing cover, and the pull-plug type cable is pulled through the sealing cover outside the clamping hole and is fixedly sealed, so that the sealing components are added at the motor cover of the deep-well pump, a protective layer is formed, the brine is prevented from penetrating into the motor, the mechanical seal is protected, the service life is prolonged, and the system stability and reliability are improved.

[0024] 2. In the utility model, when the bearing cover of the motor body is impacted, the protective sleeve slides along the limiting ring, drives the return spring to stretch and retract, then the return spring slows down the impact force and resets the protective sleeve, so that the hydraulic plunger pump outside is protected, and part of the energy of the external impact force is absorbed, and the influence on the sealing structure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A three-dimensional schematic view of a multi-stage sealing structure for a brine deep-well pump motor is provided for the utility model;

[0026] Figure 2 A structural schematic view of a motor body of a multi-stage sealing structure for a brine deep-well pump motor is provided for the utility model;

[0027] Figure 3Exploded view of a multi-stage sealing fixing steel ring for a brine deep well pump motor proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of a multi-stage sealing structure protective sleeve for a brine deep well pump motor proposed in this utility model.

[0029] Legend:

[0030] 1. Motor body; 2. Rotary power output mechanism; 201. Rotor; 202. Stator winding; 3. Electrical transmission mechanism; 301. Lead wire plug; 302. Plug-in cable; 4. Load transmission mechanism; 401. Base bearing; 402. Lower shaft base; 5. Fixed heat dissipation mechanism; 501. Stainless steel bottom cover; 502. Flat snap ring; 503. Oil bladder; 504. Edible machine oil; 505. Capacitor; 6. Bearing cover; 7. Motor shaft; 8. Fixing steel ring one; 9. Rubber ring one; 10. Fixing steel ring two; 11. Rubber ring two; 12. Limiting spring; 13. Sealing cover; 14. Main sealing sleeve; 15. Secondary sealing sleeve; 16. Mounting sleeve; 17. Limiting ring; 18. Return spring; 19. Protective sleeve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1 to 3 This utility model provides an embodiment of a multi-stage sealing structure for a brine deep well pump motor, comprising a motor body 1, a rotary power output mechanism 2 disposed in the middle of the motor body 1, the rotary power output mechanism 2 comprising a rotor 201 disposed in the middle of the interior of the rotary power output mechanism 2, and a stator winding 202 disposed outside the rotor 201, realizing the conversion of electrical energy into mechanical energy, converting the electromagnetic force generated by the stator winding 202 into the rotational motion of the rotor 201, and the rotary power output mechanism 2 providing power to the brine deep well pump to drive the pump to perform water pumping operations.

[0033] An electrical transmission mechanism 3 is located on the front side of the motor body 1. This mechanism transmits electrical energy from an external power source to the stator windings 202 inside the motor, and also provides electrical connection for motor control and monitoring. The electrical transmission mechanism 3 includes a lead-out plug 301, which serves as the interface between the mechanism and the motor's internal windings. This allows for quick connection and disconnection with a pluggable cable 302, facilitating motor installation, disassembly, and maintenance, and ensuring stable power transmission to the motor. The lead-out plug 301 is located inside the motor body 1, and a pluggable cable 302 is fixedly connected to its front side. This cable transmits electrical energy from the external power source to the lead-out plug 301, which in turn delivers it to the motor. Its pluggable design also facilitates electrical connection operations in various scenarios. The motor shaft 7 is externally rotatably connected to the middle of the electrical transmission mechanism 3, with the lead-out plug 301 and the pluggable cable 302 positioned on the side of the shaft.

[0034] A load transmission mechanism 4 is provided on the rear side of the middle of the motor body 1. The load transmission mechanism 4 includes a base bearing 401, which is located on the front side inside the load transmission mechanism 4. The base bearing 401 supports the motor shaft 7, reduces friction and wear of the motor shaft 7 during rotation, and bears the radial and axial loads generated during motor operation, ensuring the stable rotation of the motor shaft 7. A lower shaft base 402 is provided on the middle of the rear side of the load transmission mechanism 4. The lower shaft base 402 provides stable support and positioning for the motor shaft 7, ensuring the positional accuracy of the motor shaft 7 during operation, and transferring the load borne by the motor shaft 7 to the motor's foundation structure.

[0035] A heat dissipation fixing mechanism 5 is provided at the rear end of the motor body 1. The heat dissipation fixing mechanism 5 includes a stainless steel bottom cover 501, which is fixedly connected to the rear side of the heat dissipation fixing mechanism 5. The stainless steel bottom cover 501 protects the components at the rear end of the motor, preventing external impurities, moisture, etc. from entering the motor. It also serves as the outer shell of the heat dissipation fixing mechanism 5, providing a mounting base for other components. A flat snap ring 502 is fixedly connected to the rear side of the stainless steel bottom cover 501. The flat snap ring 502 is used to fix the components at the rear end of the motor, preventing them from axially moving during motor operation and ensuring the relative position stability of the various components of the motor.

[0036] An oil bladder 503 is fixedly connected to the front exterior of the stainless steel base cover 501. The oil bladder 503 stores edible machine oil 504, providing lubrication and cooling for some friction parts of the motor, reducing friction and wear between parts, and carrying away heat generated by friction. Edible machine oil 504 is also installed inside the fixed heat dissipation mechanism 5. During motor operation, the edible machine oil 504 is supplied through the oil bladder 503, forming an oil film between the various friction parts, reducing friction loss, lowering wear, and simultaneously dissipating heat. A capacitor 505 is located in the center of the front side of the fixed heat dissipation mechanism 5. During motor startup and operation, the capacitor 505 is used to adjust the phase relationship between the motor's current and voltage, helping the motor establish a rotating magnetic field and improving the motor's starting performance and operating efficiency.

[0037] Reference Figure 2 , Figure 3 A bearing cover 6 is installed on the front side of the motor body 1. The bearing cover 6 protects the bearing at the front end of the motor, preventing external impurities and moisture from entering the bearing. It also seals and secures the bearing, ensuring its normal operation. An O-ring, fasteners, a hydraulic cylinder, and bolts are located on one side of the bearing cover 6, primarily for sealing and securing. During installation, the O-ring is first placed in the corresponding position on the bearing cover 6. Then, the hydraulic cylinder is connected and secured to the bearing cover 6 using fasteners and bolts to ensure a tight seal and prevent lubricating oil leakage.

[0038] The motor shaft 7 is externally rotatably connected to the inner wall of the bearing cover 6 in the middle, and the motor shaft 7 passes through the middle of the bearing cover 6. The motor shaft 7 is rotatably connected to the middle of the motor body 1, and the motor shaft 7 is externally rotatably connected to the inner wall of the rotor 201 in the middle. The rear end of the motor shaft 7 is detachably connected to the middle of the lower shaft base 402. The motor shaft 7 is the output shaft of the motor rotation power, connecting the rotor 201 and the impeller component of the brine deep well pump, transmitting the rotational motion of the rotor 201 to drive the water pump to work.

[0039] A fixing steel ring 8 is detachably connected to the outside of the motor shaft 7. A rubber ring 9 is detachably connected inside the fixing steel ring 8. The rubber ring 9 is slidably connected to the outside of the motor shaft 7. A fixing steel ring 10 is also detachably connected to the outside of the motor shaft 7. The rear side of the fixing steel ring 10 engages with the front side of the fixing steel ring 8. A rubber ring 11 corresponds to the fixing steel ring 8 and engages on the other side of the fixing steel ring 8, further securing the rubber ring 11. Together with the fixing steel ring 8, they enhance the sealing effect on the gap between the motor shaft 7 and the pump body. The inner wall of the rubber ring 11 is slidably connected to the outside of the motor shaft 7, filling the gap between the fixing steel ring 10 and the motor shaft 7, further enhancing the sealing effect. Its elasticity and sealing properties effectively prevent brine leakage from this gap, forming a double sealing barrier together with the rubber ring 9, improving the reliability of the entire sealing structure. The inner part of the fixed steel ring 2 10 is detachably connected to a rubber ring 2 11. The two fixed steel rings 1 8 are fitted with limiting springs 12. The limiting springs 12 are fitted on the outside of the two fixed steel rings 1 8 to provide a certain elastic force so that the fixed steel rings 1 8 and the fixed steel ring 2 10 always maintain a tight engagement.

[0040] A sealing cover 13 is detachably connected to the front side of the motor body 1. The sealing cover 13 engages with the front end of the bearing cover 6, compacting the second fixing steel ring 10 and the first fixing steel ring 8 to further enhance the sealing effect. A main sealing sleeve 14 is detachably connected to the middle of the sealing cover 13. The inner wall of the middle part of the main sealing sleeve 14 is slidably connected to the outside of the motor shaft 7. A secondary sealing sleeve 15 is provided at the rear end of the main sealing sleeve 14. The main sealing sleeve 14 is a tubular rubber or plastic sealing sleeve. The inner wall of the middle part of the secondary sealing sleeve 15 is slidably connected to the outside of the motor shaft 7. The secondary sealing sleeve 15 is similar to the main sealing sleeve 14, and is a ring structure. Its material and size design match the main sealing sleeve 14, allowing it to fit tightly with the main sealing sleeve 14.

[0041] Reference Figure 1 , Figure 4 A mounting sleeve 16 is detachably connected to the outside of the bearing cover 6. A protective component for protecting the motor shaft 7 is provided on the front side of the mounting sleeve 16. The protective component includes a limiting ring 17, the rear side of which is fixedly connected to the front side of the mounting sleeve 16. When the motor body 1 is impacted, the protective sleeve 19 will slide outside the limiting ring 17, preventing the protective sleeve 19 from sliding excessively or falling off. A return spring 18 is fixedly connected to the outside of the limiting ring 17, and the protective sleeve 19 is slidably connected to the outside of the limiting ring 17. The protective sleeve 19 absorbs part of the impact force by compressing the return spring 18, protecting the outside of the motor body 1 from impact damage. At the same time, under the action of the return spring 18, it can reset after the impact and continue to provide protection for the motor body 1.

[0042] Working principle: Before installing the brine deep well pump motor, the mounting sleeve 16 and protective sleeve 19, etc., need to be wrapped around the front bearing cover 6 of the motor body 1. Then, the fixing steel ring 8 is inserted into the outside of the motor shaft 7 defined in the middle of the motor body 1. Next, the rubber ring 9 is inserted into the gap between the fixing steel ring 8 and the motor shaft 7, and then the upper limit spring 12 is put on. After that, the rubber ring 11 and the fixing steel ring 10 are inserted, so that the rubber ring 11 is in its inner wall, and the fixing steel ring 10 is locked on the opposite side of the fixing steel ring 8. Finally, the sealing cover 13 is engaged with the front end of the bearing cover 6, and the second fixing steel ring 10 and the first fixing steel ring 8 are pressed firmly. Then, the secondary sealing sleeve 15 and the main sealing sleeve 14 are inserted into the middle of the re-sealing cover 13. After the plug-in cable 302 is passed through the outer hole of the sealing cover 13, the sealing cover 13 and the bearing cover 6 are sealed and fixed with bolts, thereby preventing the brine from leaking out from the gap between the motor shaft 7 and the motor body 1.

[0043] When the bearing cover 6 of the motor body 1 is impacted, the impact force causes the protective sleeve 19 to slide outside the limiting ring 17. The return spring 18, fixed to the inner wall of the outer side of the limiting ring 17, will then extend and retract due to the impact force. Afterwards, its own elasticity will dampen the impact force, allowing the protective sleeve 19 to return to its original position. This not only protects the outside of the bearing cover 6 but also absorbs some of the energy from the external impact.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage sealing structure for a brine deep-well pump motor, comprising a motor body (1), characterized in that: The middle part of the motor body (1) is provided with a rotary power output mechanism (2), the front side of the motor body (1) is provided with an electrical transmission mechanism (3), the rear side of the middle part of the motor body (1) is provided with a load transmission mechanism (4), the rear end of the motor body (1) is provided with a fixed heat dissipation mechanism (5), the front side of the motor body (1) is provided with a bearing cover (6), the middle part of the motor body (1) is rotatably connected with a motor shaft (7), the outer part of the motor shaft (7) is detachably connected with a fixed steel ring one (8), the inner part of the fixed steel ring one (8) is detachably connected with a rubber ring one (9), the outer part of the motor shaft (7) is detachably connected with a fixed steel ring two (10), the inner part of the fixed steel ring two (10) is detachably connected with a rubber ring two (11), the outer part of the two fixed steel ring one (8) is sleeved with a limiting spring (12), the front side of the motor body (1) is detachably connected with a sealing cover (13), the middle part of the sealing cover (13) is detachably connected with a main sealing sleeve (14), the rear end of the main sealing sleeve (14) is provided with a vice sealing sleeve (15), the outer part of the bearing cover (6) is detachably connected with a mounting sleeve (16), the front side of the mounting sleeve (16) is provided with a protection assembly for protecting the motor shaft (7).

2. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The protection assembly comprises a limiting ring (17), the rear side of the limiting ring (17) is fixedly connected to the front side of the mounting sleeve (16), the outer part of the limiting ring (17) is fixedly connected with a return spring (18), and the outer part of the limiting ring (17) is slidably connected with a protection sleeve (19).

3. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The rotary power output mechanism (2) comprises a rotor (201), the rotor (201) is arranged in the inner middle part of the rotary power output mechanism (2), the outer part of the rotor (201) is provided with a stator winding (202), and the outer part of the motor shaft (7) is rotatably connected to the middle inner wall of the rotor (201).

4. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The electrical transmission mechanism (3) comprises a lead-out wire plug (301), the lead-out wire plug (301) is arranged in the inner part of the lead-out wire plug (301), the front side of the lead-out wire plug (301) is fixedly connected with a plug-in cable (302), the outer part of the motor shaft (7) is rotatably connected to the middle part of the electrical transmission mechanism (3), and the outer part of the motor shaft (7) is rotatably connected to the middle inner wall of the bearing cover (6).

5. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The load transmission mechanism (4) comprises a base bearing (401), the base bearing (401) is arranged in the inner front side of the load transmission mechanism (4), the rear side middle part of the load transmission mechanism (4) is provided with a lower shaft base (402), and the rear end of the motor shaft (7) is detachably connected to the middle part of the lower shaft base (402).

6. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The fixed heat dissipation mechanism (5) includes a stainless steel bottom cover (501), the rear side of the stainless steel bottom cover (501) is fixedly connected to the rear side of the fixed heat dissipation mechanism (5), the rear side of the stainless steel bottom cover (501) is fixedly connected with a flat clamp spring (502), the front side of the stainless steel bottom cover (501) is fixedly connected with an oil bag (503) outside, the inside of the fixed heat dissipation mechanism (5) is provided with edible mechanical oil (504), and the front side of the fixed heat dissipation mechanism (5) is provided with a capacitor (505) in the middle.

7. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The rear side of the fixed steel ring two (10) is clamped with the front side of the fixed steel ring one (8), and the outside of the rubber ring one (9) is slidably connected to the outside of the motor shaft (7).

8. The multi-stage seal structure for a brine deep-well pump motor according to claim 1, characterized in that: The middle inner wall of the main sealing sleeve (14) is slidably connected to the outside of the motor shaft (7), and the middle inner wall of the auxiliary sealing sleeve (15) is slidably connected to the outside of the motor shaft (7).

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