Motor water-cooling filtering assembly of shield pump

Abstract

The utility model belongs to the technical field of shield pumps, in particular to a motor water-cooling filter component of a shield pump, which comprises a pump body with a pump cavity and a shield motor arranged on the pump body, a rotating shaft of the shield motor penetrates through a motor end cover into the pump cavity and is sleeved with an impeller, and a water-cooling gap is reserved between a rotor and a stator of the shield motor. The motor end cover is provided with a water passing through hole communicated with the pump cavity and the water cooling gap, the rotating shaft is provided with a flow guide shaft hole communicated with the pump cavity and the water cooling gap along the axis of the rotating shaft, a filter screen is erected on the pump cavity between the impeller and the water passing through hole through a filter screen support, and the water passing through hole is communicated with the pump cavity through the filter screen. The motor is simple in structure, reasonable in design and low in cost, the filter screen is arranged on the outer side of the water passing through hole to intercept particle impurities, the motor can be effectively protected and shielded to operate normally without being affected by the particle impurities, and compared with the prior art, the motor is long in service life and stable and reliable in operation.

Description

Technical field:

[0001] The utility model belongs to the technical field of shielded pumps, in particular to a motor water-cooling filter component of a shielded pump. Background technology:

[0002] The existing Chinese utility model patent (authorization announcement number CN218913187U) discloses a water-cooled water pump, which includes a pump body and a motor. The pump body includes a pump chamber, and the motor includes a casing. The casing is provided with a stator chamber and a rotor chamber that are not connected to each other. The stator chamber is provided with a stator, and the rotor chamber is provided with a rotor. The rotor includes a rotating shaft, and the rotating shaft extends into the pump body. The pump chamber and the rotor chamber are connected. Among them, a connecting hole is provided on the pump body, and the connecting hole is located on the cavity wall of the pump body near the rotor chamber. One end of the connecting hole is connected to the pump chamber, and the other end is connected to the rotor chamber. The rotating shaft is provided with a guide hole, and the guide hole passes through the rotating shaft along the axial direction of the rotating shaft. One end of the guide hole is connected to the pump chamber, and the other end is connected to the rotor chamber. That is, external water flows into the water inlet into the pump cavity, and enters the rotor cavity through the connecting hole to cool the motor. The water in the rotor cavity will flow back to the water inlet of the pump cavity through the guide hole of the rotating shaft under the action of negative pressure, realizing the cooling cycle.

[0003] However, in actual use, it was discovered that particulate matter could enter the pump cavity from the external water. As the cooling cycle continued, these impurities would enter the motor, severely impacting the motor's magnetic conversion and even blocking the connecting holes, leading to cooling failure. Even with disassembly and repairs to clear the blocked connecting holes, it was difficult to remove the impurities from the motor. Summary of the invention:

[0004] The purpose of the utility model is to provide a motor water cooling filter assembly for a shielded pump, which has a filter screen arranged on the outside of the water through hole to intercept particulate impurities, thereby effectively protecting the shielded motor from normal operation without being affected by particulate impurities.

[0005] The utility model is achieved in this way:

[0006] A motor water-cooling filter assembly for a shielded pump includes a pump body having a pump cavity, and a shielded motor arranged on the pump body. The rotating shaft of the shielded motor passes through the motor end cover to the pump cavity and is sleeved with an impeller. A water-cooling gap exists between the rotor and the stator of the shielded motor. A water through hole connecting the pump cavity and the water-cooling gap is provided on the motor end cover. A guide shaft hole connecting the pump cavity and the water-cooling gap is provided along the axis of the rotating shaft. A filter screen is provided on the pump cavity between the impeller and the water through hole through a filter screen bracket, and the water through hole is connected to the pump cavity through the filter screen.

[0007] In the above-mentioned motor water-cooling filter assembly of a shielded pump, a self-priming pump head is arranged in the pump chamber and rests against the motor end cover. A boosting chamber connected to the water through hole is formed between the self-priming pump head and the motor end cover. The impeller rotates in the boosting chamber, and the filter screen and the filter screen bracket are arranged on the self-priming pump head.

[0008] In the above-mentioned motor water-cooling filter assembly of a shielded pump, the self-priming pump head includes a self-priming water inlet sleeve and one or more guide sleeves stacked between the self-priming water inlet sleeve and the motor end cover. The self-priming water inlet sleeve has a water inlet port connected to the pump chamber. The impeller rotates in each guide sleeve. A guide bracket for guiding is provided between adjacent impellers. A self-priming water outlet is provided on the guide sleeve near the motor end cover. The filter screen and the filter screen bracket are arranged on the guide sleeve near the motor end cover.

[0009] In the above-mentioned motor water-cooling filter assembly of a shielded pump, the filter bracket and the corresponding guide sleeve are an integrated structure.

[0010] In the above-mentioned motor water-cooling filter assembly of a shielded pump, a plurality of filter windows are evenly distributed on the filter screen bracket around the axis of the rotating shaft, and the outer edge of the filter screen is embedded in the filter window.

[0011] In the above-mentioned motor water-cooling filter assembly of a shielded pump, the filter window is in a fan-shaped structure, and the filter screen corresponds to the structure of the filter window.

[0012] The outstanding advantages of the utility model compared with the prior art are:

[0013] The utility model has a simple structure, reasonable design and low cost. By arranging a filter net on the outside of the water through hole to intercept particulate impurities, it effectively protects the shielded motor to operate normally without being affected by particulate impurities. Compared with the existing technology, it has a longer service life and the motor runs stably and reliably. Description of the drawings:

[0014] Figure 1 This is a cross-sectional view of the entire canned motor pump of the present utility model;

[0015] Figure 2 This is an exploded view of the cooperation between the filter screen, filter bracket and shielded motor of the utility model.

[0016] In the figure: 1. Pump chamber; 2. Pump body; 3. Rotating shaft; 4. Motor end cover; 5. Impeller; 6. Rotor; 7. Stator; 8. Water through hole; 9. Diversion shaft hole; 10. Filter bracket; 11. Filter; 12. Self-priming water inlet sleeve; 13. Diversion sleeve; 14. Water inlet port; 15. Diversion bracket. Specific implementation method:

[0017] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0018] A motor water-cooling filter assembly for a shielded pump comprises a pump body 2 having a pump chamber 1, and a shielded motor arranged on the pump body 2. The rotating shaft 3 of the shielded motor passes through the motor end cover 4 to the pump chamber 1 and is sleeved with an impeller 5. A water-cooling gap exists between the rotor 6 and the stator 7 of the shielded motor. The motor end cover 4 is provided with a water through hole 8 connecting the pump chamber 1 and the water-cooling gap. The rotating shaft 3 is provided with a guide shaft hole 9 connecting the pump chamber 1 and the water-cooling gap along its axis. The pump chamber 1 between the impeller 5 and the water through hole 8 is provided with a filter screen 11 through a filter screen bracket 10. The water through hole 8 is connected to the pump chamber 1 through the filter screen 11.

[0019] The utility model has a simple structure, reasonable design and low cost. By arranging a filter net 11 on the outside of the water through hole 8 to intercept particulate impurities, it effectively protects the shielded motor to operate normally without being affected by particulate impurities. Compared with the existing technology, it has a longer service life and the motor runs stably and reliably.

[0020] Among them, in order to allow the water in the pump chamber 1 to effectively pass through the filter 11 and the water through hole 8 to the water-cooling gap, a self-priming pump head is provided in the pump chamber 1, which is against the motor end cover 4. A boosting chamber connected to the water through hole 8 is formed between the self-priming pump head and the motor end cover 4. The impeller 5 rotates and fits in the boosting chamber. The filter 11 and the filter bracket 10 are provided on the self-priming pump head. That is, the impeller 5 rotates in the boosting chamber to increase the water pressure in the boosting chamber, thereby causing the water in the boosting chamber to flow into the water-cooling gap. Correspondingly, a low-pressure area is formed at the water inlet end of the boosting chamber, and the guide shaft hole 9 of the rotating shaft 3 is located at the water inlet end of the boosting chamber. Then, the water in the water-cooling gap can flow to the water inlet end of the boosting chamber through the guide shaft hole 9, completing the water cooling cycle.

[0021] Furthermore, the present invention adopts a self-priming pump structure, so the self-priming pump head includes a self-priming water inlet sleeve 12, and one or more guide sleeves 13 stacked between the self-priming water inlet sleeve 12 and the motor end cover 4. The self-priming water inlet sleeve 12 has an inlet port 14 connected to the pump chamber 1. The impeller 5 rotates and fits in each guide sleeve 13. A guide bracket 15 for guiding is provided between two adjacent impellers 5. A self-priming water outlet is provided on the guide sleeve 13 near the motor end cover 4. Correspondingly, the specific matching structure of the filter 11 and the filter bracket 10 is as follows: the filter 11 and the filter bracket 10 are provided on the guide sleeve 13 near the motor end cover 4. In this embodiment, the filter bracket 10 and the corresponding guide sleeve 13 are an integrated structure.

[0022] Furthermore, to ensure a high flow rate of water flowing through the filter screen 11 to the water through hole 8, the filter screen holder is provided with a plurality of filter windows evenly distributed around the axis of the rotating shaft 3. The outer edges of the filter screen 11 are embedded in the filter windows. Furthermore, in this embodiment, the filter windows are fan-shaped, and the filter screen 11 corresponds to the structure of the filter windows.

[0023] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor water-cooling filter assembly for a canned motor pump, comprising a pump body (2) having a pump chamber (1), and a canned motor disposed on the pump body (2), wherein a rotating shaft (3) of the canned motor passes through a motor end cover (4) to the pump chamber (1) and is sleeved with an impeller (5), a water-cooling gap exists between a rotor (6) and a stator (7) of the canned motor, a water-through hole (8) communicating between the pump chamber (1) and the water-cooling gap is formed on the motor end cover (4), and a guide shaft hole (9) communicating between the pump chamber (1) and the water-cooling gap is formed along the axis of the rotating shaft (3), wherein the guide shaft hole (9) communicating between the pump chamber (1) and the water-cooling gap is formed, characterized in that: The pump chamber (1) located between the impeller (5) and the water through hole (8) is provided with a filter screen (11) via a filter screen bracket (10), and the water through hole (8) is communicated with the pump chamber (1) via the filter screen (11).

2. The motor water cooling filter assembly of a canned motor pump according to claim 1, characterized in that: A self-priming pump head is provided in the pump chamber (1) and abuts against the motor end cover (4). A booster chamber connected to the water through hole (8) is formed between the self-priming pump head and the motor end cover (4). The impeller (5) is rotatably engaged in the booster chamber. The filter screen (11) and the filter screen bracket (10) are provided on the self-priming pump head.

3. The motor water cooling filter assembly of a canned motor pump according to claim 2, characterized in that: The self-priming pump head comprises a self-priming water inlet sleeve (12), and one or more guide sleeves (13) stacked between the self-priming water inlet sleeve (12) and the motor end cover (4); the self-priming water inlet sleeve (12) is provided with a water inlet port (14) communicating with the pump chamber (1); the impeller (5) is rotatably fitted in each guide sleeve (13); a guide bracket (15) for guiding flow is provided between two adjacent impellers (5); a self-priming water outlet is provided on the guide sleeve (13) close to the motor end cover (4); the filter screen (11) and the filter screen bracket (10) are provided on the guide sleeve (13) close to the motor end cover (4).

4. The motor water cooling filter assembly of a canned motor pump according to claim 3, characterized in that: The filter support (10) and the corresponding flow guide sleeve (13) are an integrated structure.

5. The motor water cooling filter assembly of a canned motor pump according to claim 3 or 4, characterized in that: The filter screen support (10) is provided with a plurality of filter windows evenly distributed in the circumferential direction around the axis of the rotating shaft (3), and the outer edge of the filter screen (11) is embedded in the filter windows.

6. The motor water cooling filter assembly of a canned motor pump according to claim 5, characterized in that: The filter window is in a fan-shaped structure, and the filter screen (11) corresponds to the structure of the filter window.

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