Impeller structure of submersible pump

Abstract

The utility model belongs to the technical field of water pumps, in particular to an impeller structure of a submersible pump, which comprises a flow guide shell and an impeller arranged in the flow guide shell, an insert is embedded in the flow guide shell, the lower end of the impeller protrudes downwards to form more than two impeller rings which abut against the insert for sealing, an annular groove is formed between every two adjacent impeller rings, and the impeller is arranged in the annular groove. Each wear ring is provided with a water passing channel, the water passing channels are communicated with the corresponding annular grooves, and the water passing channels and the annular grooves form a water passing channel communicated with the outer side of the outermost wear ring and the inner side of the innermost wear ring. The impeller ring can be effectively prevented from being abraded in a short time to reduce the performance of the water pump, and meanwhile the lower end of the flow guide shell is prevented from being broken due to high temperature to damage the water pump.

Description

Technical fields:

[0001] This utility model belongs to the field of water pump technology, and specifically refers to an impeller structure for a submersible pump. Background technology:

[0002] The inlet ring of existing submersible pumps for wells generally adopts an end-face sealing structure, such as Figure 1 As shown, its structural feature is that the impeller 1 has two or more inlet rings 2 that are close to the inserts 4 of the guide shell 3. Its disadvantage is that when the water pump is running, the impeller 1 rotates at high speed and the impeller 1 has a downward axial force. As a result, the impeller 1 and the inserts 4 of the guide shell 3 generate friction and heat. The temperature at the friction point can reach 400℃. The inlet rings 2 of the impeller 1 wear out in a short time, which leads to a decrease in the performance of the water pump. At the same time, the lower end of the guide shell 3 also cracks due to high temperature, which damages the water pump. Summary of the Invention:

[0003] The purpose of this invention is to provide an impeller structure for a submersible pump that can effectively prevent the pump performance from declining due to wear of the inlet ring in a short period of time, and at the same time prevent the pump from being damaged due to cracking at the lower end of the guide shell caused by high temperature.

[0004] This utility model is implemented as follows:

[0005] A submersible pump impeller structure includes a guide shell and an impeller disposed within the guide shell. An insert is embedded in the guide shell. The lower end of the impeller protrudes downward to form a sealing ring that abuts against the insert. There are two or more sealing rings, and an annular groove is formed between two adjacent sealing rings. Each sealing ring is provided with a water passage. The water passage connects to the corresponding annular groove. The water passage and the annular groove form a water passage connecting the outer side of the outermost sealing ring and the inner side of the innermost sealing ring.

[0006] In the impeller structure of the submersible pump described above, each wear ring is provided with a water passage, and the water passages of two adjacent wear rings are respectively located on both sides of the impeller axis.

[0007] In the impeller structure of the submersible pump described above, the center of the water passage is on the same straight line as the center of the impeller.

[0008] In the impeller structure of the submersible pump described above, the water passage is a notch with an opening at the lower end.

[0009] In the impeller structure of the submersible pump described above, the width W of the notch is 1-3 mm.

[0010] In the impeller structure of the submersible pump described above, the depth H of the notch is 0.5-2 mm.

[0011] The outstanding advantages of this utility model compared to the prior art are:

[0012] 1. This utility model has a water passage on each mouth ring. The water passage and the annular groove form a water passage connecting the outer side of the outermost mouth ring and the inner side of the innermost mouth ring. When the water pump is running, water enters from the inlet of the water passage of the outermost mouth ring, flows out from the outlet of the innermost mouth ring after passing through the water passage, thereby taking away the heat of the mouth ring and keeping the temperature of the impeller and insert below 100°C. This avoids the mouth ring from wearing out in a short time, which would cause the water pump performance to decline. At the same time, it also avoids the water pump from being damaged due to the cracking of the lower end of the guide shell caused by high temperature.

[0013] 2. Each of the mouth rings in this invention is provided with a water passage, and the water passages of two adjacent mouth rings are respectively located on both sides of the impeller axis. This minimizes leakage while ensuring a long water passage path and good heat dissipation of the mouth rings. Attached image description:

[0014] Figure 1 This is a cross-sectional view of the prior art;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a bottom view of the impeller of this utility model;

[0017] Figure 4 This is a cross-sectional view of the impeller of this utility model.

[0018] Figure label:

[0019] Figure 1 In the middle: 1. Impeller; 2. Inlet ring; 3. Guide shell; 4. Insert.

[0020] Figure 2-4 In the middle: 11. Guide shell; 12. Impeller; 13. Insert; 14. Mouth ring; 15. Annular groove; 16. Notch. Detailed implementation method:

[0021] The present invention will be further described below with reference to specific embodiments. See also: Figure 2 —4:

[0022] A submersible pump impeller structure includes a guide shell 11 and an impeller 12 disposed within the guide shell 11. An insert 13 is embedded in the guide shell 11. The lower end of the impeller 12 protrudes downward to form a sealing ring 14 that abuts against the insert 13. There are two or more rings 14, and an annular groove 15 is formed between two adjacent rings 14. Each ring 14 is provided with a water passage. The water passage connects to the corresponding annular groove 15. The water passage and the annular groove 15 form a water passage connecting the outer side of the outermost ring 14 and the inner side of the innermost ring 14.

[0023] like Figure 2-4 As shown, each of the present invention has a water passage on each mouth ring 14. The water passage and the annular groove 15 form a water passage connecting the outer side of the outermost mouth ring 14 and the inner side of the innermost mouth ring 14. When the water pump is running, water enters from the inlet of the water passage of the outermost mouth ring 14, flows out from the outlet of the water passage of the innermost mouth ring 14 after passing through the water passage, thereby carrying away the heat of the mouth ring 14, keeping the temperature of the impeller 1 and the insert 13 below 100°C, avoiding wear of the mouth ring 14 in a short time that would cause a decrease in water pump performance, and at the same time preventing the lower end of the guide shell 11 from cracking due to high temperature and causing damage to the water pump.

[0024] In this invention, very little water flows out of the water passage, which has a minimal impact on the performance of the submersible pump.

[0025] To reduce leakage, such as Figure 2-4 As shown, each of the inlet rings 14 is provided with a water passage, and the water passages of two adjacent inlet rings 14 are respectively located on both sides of the axis of the impeller 12, which makes the water passage path long and the heat dissipation effect of the inlet rings 14 good.

[0026] Preferably, the center of the water passage is on the same straight line as the center of the impeller 12.

[0027] For ease of processing, the water passage is a notch 16 with an opening at the lower end.

[0028] To further reduce leakage, such as Figure 3 As shown, the width W of the notch 16 is 1-3 mm. In this embodiment, the width W of the notch 16 is 2 mm.

[0029] To further reduce leakage, such as Figure 2 , 4 As shown, the depth H of the notch 16 is 0.5-2 mm. In this embodiment, the depth H of the notch 16 is 1.5 mm.

[0030] This invention does not increase costs or investment, nor does it increase the difficulty of the process, thus extending the life of the submersible pump for wells by more than 5 times.

[0031] When two notches 14 are provided, the notch 16 of the outer notch 14 is located on the left side of the impeller 12 axis, and the notch 16 of the inner notch 14 is located on the right side of the impeller 12 axis, as shown below. Figure 2-4 As shown.

[0032] When there are three mouth rings 14, the notch 16 of the outermost mouth ring 14 is located on the left side of the impeller 12 axis, the notch 16 of the middle mouth ring 14 is located on the right side of the impeller 12 axis, and the notch 16 of the innermost mouth ring 14 is located on the left side of the impeller 12 axis.

[0033] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An impeller structure for a submersible pump, comprising a guide shell (11) and an impeller (12) disposed within the guide shell (11), wherein an insert (13) is embedded within the guide shell (11), and the lower end of the impeller (12) protrudes downward to form a sealing ring (14) that abuts against the insert (13), wherein two or more sealing rings (14) are provided, and an annular groove (15) is formed between two adjacent sealing rings (14), characterized in that: Each ring (14) is provided with a water passage, which is connected to the corresponding annular groove (15). The water passage and the annular groove (15) form a water passage connecting the outer side of the outermost ring (14) and the inner side of the innermost ring (14).

2. The impeller structure of a submersible pump according to claim 1, characterized in that: Each mouth ring (14) is provided with a water passage, and the water passages of two adjacent mouth rings (14) are respectively located on both sides of the axis of the impeller (12).

3. The impeller structure of a submersible pump according to claim 2, characterized in that: The center of the water passage is on the same straight line as the center of the impeller (12).

4. The impeller structure of a submersible pump according to claim 1, characterized in that: The water passage is a notch (16) with an opening at the lower end.

5. The impeller structure of a submersible pump according to claim 4, characterized in that: The width of the notch (16) is 1-3 mm.

6. The impeller structure of a submersible pump according to claim 4, characterized in that: The depth of the notch (16) is 0.5-2 mm.

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