Wear-resistant structure of submersible pump for well

Abstract

A wear-resistant pad is arranged between an impeller and a guide vane, the wear-resistant pad is composed of a wear-resistant part and a pressure-bearing part, the wear-resistant part is arranged above the pressure-bearing part, a hexagonal through hole matched with a pump shaft is formed in the center of the wear-resistant pad, and the pump shaft penetrates through the impeller, the through hole of the wear-resistant pad and the guide vane to be in clearance fit. The wear-resisting part is a cylinder made of vulcanized rubber, the pressure-bearing part is a cylinder with a hexagonal through hole in the center, the top surface of the pressure-bearing part is fixedly connected with the bottom surface of the wear-resisting part, and the bottom surface of the pressure-bearing part is clamped above the guide vane. The utility model relates to a novel-structure wear-resistant pad of a submersible pump for a well, which consists of a pump shaft, an impeller, an impeller sleeve, a sealing pad, a wear-resistant pad and a guide vane. The abrasion-resistant pad can be effectively prevented from rotating relative to the pump shaft in the operation process of the submersible pump for the well, the pump shaft of the pump is prevented from being collided or abraded at the matched position of the abrasion-resistant pad, the pump shaft is prevented from being cut off due to abrasion, and the service life of the submersible pump for the well is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of centrifugal pumps and relates to a wear-resistant structure of a submersible pump for a well. Background Art

[0002] Nowadays, in my country's well submersible pump industry, traditional wear-resistant pad components are generally made of plastic. This material has obvious deficiencies in wear resistance and reliability, and its hardness is relatively low, which is very easy to wear during daily use. What's more serious is that once the wear-resistant pad is deformed, it will produce relative rotational motion with the pump shaft, which will undoubtedly increase the degree of wear of the pump shaft at the wear-resistant pad mating point, and may even cause the pump shaft to break due to excessive wear. In addition, after the wear-resistant pad is used for a long time, the impeller may sink, and then collide or wear with the impeller sleeve. This situation will cause the impeller or impeller sleeve of the pump to wear rapidly, and the motor load will continue to increase, which may eventually cause the motor to overheat and burn, causing the entire product to have to be scrapped. The existence of these problems has seriously affected the service life and efficiency of the well submersible pump, and has also caused considerable trouble to the normal use of users. Utility Model Content

[0003] The utility model overcomes the above-mentioned defects, aims to ensure the long-term operation of the well submersible pump, prolong the service life of the well submersible pump, and provides a wear-resistant structure of the well submersible pump.

[0004] The utility model of wear-resistant structure of submersible pump for wells is briefly described as follows:

[0005] The utility model discloses a wear-resistant structure of a submersible pump for a well, comprising a pump shaft, an impeller, an impeller sleeve, a sealing pad and a guide vane. A wear-resistant pad is arranged between the impeller and the guide vane. The wear-resistant pad is composed of a wear-resistant part and a pressure-bearing part. The wear-resistant part is arranged above the pressure-bearing part. A hexagonal through hole matching the pump shaft is opened in the center of the wear-resistant pad. The pump shaft passes through the impeller, the through hole of the wear-resistant pad and the gap of the guide vane. The wear-resistant part is a cylinder made of vulcanized rubber. The pressure-bearing part is a cylinder with a hexagonal through hole in the center. The top surface of the pressure-bearing part is fixedly connected to the bottom surface of the wear-resistant part, and the bottom surface of the pressure-bearing part is clamped above the guide vane.

[0006] Furthermore, the wear-resistant portion is a truncated cone.

[0007] Furthermore, a supporting part is provided on the top of the wear-resistant part, and the supporting part is a cylinder with a hexagonal through hole in the center, and three U-shaped grooves are provided on the side of the cylinder corresponding to the midpoints of the inter-positions of the hexagonal through holes. The wear-resistant part is composed of three U-shaped protrusions and a cylinder with a hexagonal through hole in the center, and the U-shaped protrusion is integrally formed with the cylinder, and the U-shaped protrusion matches the U-shaped groove of the supporting part and is snapped into the U-shaped groove.

[0008] Furthermore, the supporting part and the pressure-bearing part are made of cold-rolled stainless steel.

[0009] The utility model has the characteristics of simple structure, reasonable design and reliable performance. It can effectively prevent the relative rotational movement between the wear-resistant pad and the pump shaft during the operation of the submersible pump for wells, resulting in collision or wear at the mating part of the pump shaft and the wear-resistant pad, and the pump shaft being worn and cut off. It can also prevent accidents such as the impeller sinking during the operation of the submersible pump for wells, colliding or wearing with the impeller sleeve, resulting in rapid wear of the impeller or impeller sleeve of the pump and an increase in the motor load, which may burn out the motor. It effectively improves the service life of the submersible pump for wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the wear-resistant structure of the submersible pump for wells;

[0011] Figure 2 is a schematic diagram of the supporting part structure;

[0012] Figure 3 is a schematic diagram of the wear-resistant part structure;

[0013] Figure 4 is a schematic diagram of the structure where the wear-resistant part is a frustum of a cone;

[0014] Figure 5 is a top view of the wear-resistant pad;

[0015] Figure 6 is a sectional view taken along line A-A;

[0016] Figure 7 is an axonometric view of the wear-resistant pad;

[0017] In the figure: 1 is the pump shaft, 2 is the impeller, 3 is the impeller sleeve, 4 is the gasket, 5 is the wear-resistant pad, 6 is the pressure-bearing part, 7 is the guide vane, 8 is the wear-resistant part, and 9 is the supporting part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The wear-resistant structure of the submersible pump for wells of the utility model is realized as follows. The following is a specific description with reference to the drawings.

[0019] See Figure 1, Wear-resistant structure of submersible pump for well, including pump shaft 1, impeller 2, impeller sleeve 3, gasket 4, wear-resistant pad 5 and guide vane 7. The wear-resistant pad 5 is composed of a support part 9, a wear-resistant part 8 and a pressure-bearing part 6. A hexagonal through-hole matching the pump shaft 1 is opened in the center of the wear-resistant pad 5. The pump shaft 1 passes through the through-holes of the impeller 2 and the wear-resistant pad 5 and is in clearance fit with the guide vane 7. The support part 9 is a cylinder with a hexagonal through-hole opened in the center. A U-shaped groove is correspondingly opened on the side surface of the cylinder at the midpoint of the intermediate position of the hexagonal through-hole, which can slow down the wear of the support part 9 and extend the service life. The support part 9 is made of cold-rolled stainless steel with high hardness to prevent damage to the wear-resistant part 8 and the impeller. The wear-resistant part is composed of three U-shaped convex blocks and a cylinder with a hexagonal through-hole opened in the center. The U-shaped convex blocks are integrally formed with the cylinder, and the U-shaped convex blocks are inserted into the U-shaped groove of the support part in a matching manner. The wear-resistant part is made of vulcanized rubber, and the wear-resistant part is clamped with the support part. The cylinder of the wear-resistant part is replaced with a frustum of a cone to strengthen the wear-resistant function. The pressure-bearing part 6 is a cylinder with a hexagonal through-hole opened in the center. A part of the cylinder center line of the pressure-bearing part 6 is symmetrically cut off to match the blades of the guide vane. The bottom surface of the pressure-bearing part is clamped above the guide vane 7. The pressure-bearing part is made of cold-rolled stainless steel with high hardness to prevent damage to the guide vane and the pump shaft caused by deformation.

[0020] The utility model has the characteristics of simple structure, reasonable design and reliable performance. It can effectively prevent the relative rotational movement between the wear-resistant pad and the hexagonal shaft of the submersible pump for well during operation, resulting in collision or wear at the matching part of the hexagonal shaft of the pump and the wear-resistant pad, and the pump shaft is worn and cut off. It can also prevent accidents such as the impeller of the submersible pump for well sinking during operation, colliding or wearing with the impeller sleeve, resulting in rapid wear of the impeller or impeller sleeve of the pump and the motor load increasing and burning out the motor, effectively improving the service life of the submersible pump for well.

Claims

1. A wear-resistant structure for a submersible pump for wells, comprising a pump shaft (1), an impeller (2), an impeller sleeve (3), a gasket (4) and a guide vane (7), characterized in that, A wear-resistant pad (5) is provided between the impeller (2) and the guide vane (7). The wear-resistant pad (5) is composed of a wear-resistant part (8) and a pressure-bearing part (6). The wear-resistant part (8) is placed above the pressure-bearing part (6). A hexagonal through hole matching the pump shaft (1) is opened in the center of the wear-resistant pad (5). The pump shaft (1) passes through the impeller (2), the through hole of the wear-resistant pad (5), and the guide vane (7) with clearance fit. The wear-resistant part (8) is a cylinder made of vulcanized rubber. The pressure-bearing part (6) is a cylinder with a hexagonal through hole opened in the center. The top surface of the pressure-bearing part (6) is fixedly connected to the bottom surface of the wear-resistant part (8). A part of the cylinder center line of the pressure-bearing part (6) is symmetrically cut off to match the blades of the guide vane. The bottom surface of the pressure-bearing part (6) is clamped above the guide vane (7).

2. The wear-resistant structure of the submersible pump for wells according to claim 1, wherein, The wear-resistant part (8) is a frustum of a cone.

3. The wear-resistant structure of the submersible pump for wells according to claim 1, characterized in that, A support part (9) is provided at the top of the wear-resistant part (8). The support part (9) is a cylinder with a hexagonal through hole opened in the center. Three U-shaped grooves are correspondingly opened on the side surface of the cylinder at the midpoint between the positions of the hexagonal through hole. The wear-resistant part (8) is composed of three U-shaped convex blocks and a cylinder with a hexagonal through hole opened in the center. The U-shaped convex blocks are integrally formed with the cylinder. The U-shaped convex blocks match the U-shaped grooves of the support part (9) and are clamped in the U-shaped grooves.

4. The wear-resistant structure of the submersible pump for well according to claim 3, characterized in that, The support part (9) and the pressure-bearing part (6) are made of cold-rolled stainless steel.

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