High-speed deep-well pump

Abstract

The utility model provides a high-speed deep-well pump which comprises a motor, a motor base, a support, a lower fixing support assembly, a plurality of pump body assemblies, an upper fixing support assembly and a water outlet flange which are sequentially arranged from bottom to top, and the upper end and the lower end of an impeller shaft are matched with the upper fixing support assembly and the lower fixing support assembly respectively. The upper fixing support assembly and the lower fixing support assembly are consistent in structure and each comprise a support body and a shaft sleeve assembly, the impeller shaft is further sleeved with a sand-proof sleeve, the sand-proof sleeve is located below the support body, and the upper end face of the sand-proof sleeve is attached to the lower surface of the support body in a sealed mode under the impact effect of water flow. And the sand-proof sleeve has taper. High-pressure water can achieve real high-speed operation, under the state, the impeller shaft keeps good concentricity and is matched with the impeller properly, and the abrasion rate between the impeller shaft and the impeller is lower; and the totally-enclosed filter screen prevents more or thicker silt from entering the deep-well pump, so that the service life of the deep-well pump is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep well pumps, and in particular relates to a high-speed deep well pump. Background Art

[0002] A deep well pump is a pump that is immersed in a groundwater well to pump and deliver water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment. Its structure usually includes a motor and a pump body, and there is a connecting component between the motor and the pump body. The connecting component includes a motor seat and a bracket, wherein the bracket matches the front end cover of the motor, and the motor seat matches the pump body; the pump body has multiple coaxial impellers arranged in an up-and-down manner, and the multiple impellers are arranged one by one on the impeller shaft, and the impeller shaft is fixedly connected to the motor shaft through a coupling, so that the motor shaft drives the impeller shaft, and then drives the multiple impellers to rotate at high speed.

[0003] In actual application, we found that it is difficult for existing deep well pumps to achieve high speed operation. The reasons are as follows: 1. The various parts of the impeller are spot welded and cannot withstand the centrifugal force of high speed; 2. It is difficult to achieve a high concentricity between the impeller shaft and the impeller during processing and assembly, resulting in greater wear of the impeller and impeller shaft and a short service life; 3. The filter screen is an open structure and cannot filter the sediment in the water well, resulting in the sediment entering between the impeller shaft and the impeller, greatly increasing the wear between the two; 4. The sediment is rushed to the inner wall of the impeller guide vane casing by the high-speed centrifugal force of the impeller, which has a large impact on the inner wall of the guide vane casing, causing great wear and a short service life.

[0004] Therefore, how to improve the impeller strength, reduce the wear between the impeller shaft and the impeller, and increase the operating speed of the deep well pump while extending the service life of the entire machine is a technical problem that needs to be urgently solved in the industry. Summary of the invention

[0005] The utility model aims to solve the existing technical problem and provide a high-speed deep well pump, which can improve the strength of the impeller, improve the concentricity between the impeller shaft and the impeller, and improve the stability of the impeller shaft rotation, thereby achieving the purpose of high speed; in addition, it can also improve the filtering performance, avoid more sediment from entering the deep well pump, reduce the wear between the impeller and the impeller shaft, and reduce the impact force on the inner wall of the guide vane casing, thereby extending the service life.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] The utility model discloses a high-speed deep well pump, comprising a motor, a motor seat, a bracket, a lower fixed bracket assembly, a plurality of pump body assemblies, an upper fixed bracket assembly and a water outlet flange which are sequentially arranged from bottom to top, wherein the pump body assembly comprises a plurality of pump body units superimposed along the axial direction, each pump body unit comprises a guide vane shell and an impeller arranged in the guide vane shell, the impeller shaft sequentially passes through the central holes of the impellers in the plurality of pump body units, and the upper and lower ends of the impeller shaft are matched on the upper fixed bracket assembly and the lower fixed bracket assembly respectively, the upper fixed bracket assembly and the lower fixed bracket assembly The structures of the two are consistent, and both include a bracket main body, a sleeve assembly embedded in the central axis hole of the bracket main body, and a sand-proof sleeve is also sleeved on the impeller shaft. The sand-proof sleeve is located below the bracket main body. Under the impact of the water flow, the upper end surface of the sand-proof sleeve is sealed and fits the lower surface of the bracket main body; the sand-proof sleeve has a taper, and the direction of the taper is opposite to the direction of the water flow, so that when the water flows between the impeller shaft and the bracket main body, the water flow is guided by the sand-proof sleeve and diffuses and flows around along its taper, thereby reducing the entry of mud and sand between the impeller shaft and the bracket main body.

[0008] Compared with the prior art, the utility model adopts an upper fixed bracket and a lower fixed bracket for connection and support at both ends of the impeller shaft, thereby greatly improving the concentricity between the impeller shaft and the impeller, thereby reducing the wear between the impeller shaft and the center hole of the impeller; in addition, the impeller adopts a full welding process and increases the thickness of the impeller plate to achieve an integrated structure, that is: the existing impeller plate center is embedded with a shaft sleeve, under high-speed operation, the impeller plate becomes loose relative to the shaft sleeve, the reason for the split design is that the thickness of the impeller plate is small and it is difficult to connect with the impeller shaft, while the impeller plate of the utility model is thicker, we directly set an axial hole in the center of the impeller plate, this axial hole is sufficient to dock with the impeller shaft, and rotate synchronously with the impeller shaft, thereby improving its bearing strength, which is 5-10 times higher than the existing bearing strength and can withstand a rotation speed of 30,000-50,000 rpm.

[0009] The shaft sleeve assembly comprises a graphite sleeve and a ceramic shaft sleeve embedded in the graphite sleeve, and the impeller shaft is inserted in the ceramic shaft sleeve; the inner wall of the graphite sleeve is provided with a plurality of sand discharge grooves uniformly distributed in a circumference.

[0010] The added shaft sleeve assembly improves the wear resistance between the impeller shaft and the bracket body, and further helps the accuracy of impeller shaft installation; the graphite sleeve is provided with a sand discharge groove, which can promptly discharge the sand between the impeller shaft and the impeller center hole, avoiding unnecessary wear caused by long-term presence of sand between the impeller shaft and the impeller.

[0011] A filter screen is arranged inside the motor seat. The filter screen is cylindrical, and its upper edge and lower edge are respectively sealed and fixed on the top plate and bottom plate of the motor seat. Water flows from the outside of the filter screen toward the inside along the radial direction of the filter screen.

[0012] Furthermore, symmetrical embedding seats are provided on the top plate and the bottom plate of the motor seat, and embedding grooves are provided on the embedding seats, and the upper edge and the lower edge of the filter are respectively embedded in the corresponding embedding grooves.

[0013] The fully enclosed filter is movably fixed between two grooves and can be replaced according to different environments.

[0014] A rubber layer is sprayed on the inner surface of the guide vane housing.

[0015] The rubber layer is elastic and also provides an additional layer of protection for the inner wall of the guide vane casing. The sand in the water is rushed to the rubber layer by the high-speed centrifugal force of the impeller, causing the rubber layer to deform, thereby buffering the impact of the sand.

[0016] In summary, the beneficial effects of the utility model are:

[0017] Compared with the prior art, the high-speed deep well pump of the utility model structure can achieve a rotation speed of 30,000-50,000 rpm, realizing true high-speed operation. In this state, the impeller shaft of the utility model maintains good concentricity and cooperates well with the impeller, and the wear rate between the two is lower; the fully enclosed filter screen prevents more or coarser sediment from entering the deep well pump, thereby extending the service life of the deep well pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural sectional view of the utility model high-speed deep well pump;

[0019] Figure 2 yes Figure 1 A magnified view of part A;

[0020] Figure 3 It is a three-dimensional exploded view of the upper fixing bracket / lower fixing bracket of the utility model high-speed deep well pump;

[0021] Figure 4 It is a three-dimensional diagram of the motor base of the utility model high-speed deep well pump;

[0022] Figure 5 It is a stereoscopic diagram of the impeller of the utility model high-speed deep well pump. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] See also Figures 1 to 5The utility model provides a high-speed deep well pump, including a motor (not shown in the figure), a motor seat 1, a bracket 2, a lower fixed bracket assembly 3, a plurality of pump body assemblies 4, an upper fixed bracket assembly 5 and a water outlet flange 6, which are arranged in sequence from bottom to top. The whole is fixedly connected by a plurality of circumferentially evenly distributed tie straps 7; the bracket 2 can be designed as an integral part of the motor seat 1, the lower part of the motor seat 1 is connected to the motor (not shown in the figure), and the bracket 2 is connected to the lower fixed bracket assembly 3. In fact, the motor seat 1 also serves as a water inlet. A filter screen 8 is installed inside the motor seat 1 to perform preliminary filtering on the water entering the water inlet to prevent too much sediment from entering the deep well pump; the filter screen 8 is cylindrical, and its upper and lower edges are respectively sealed and fixed on the top plate 9 and the bottom plate 10 of the motor seat 1, and water flows from the outside of the filter screen 8 to the inside thereof along the radial direction of the filter screen 8.

[0025] Furthermore, symmetrical embedding seats 11 are provided on the top plate 9 and the bottom plate 10 of the motor seat 1 , and embedding grooves 12 are provided on the embedding seats 11 . The upper edge and the lower edge of the filter 8 are respectively embedded in the corresponding embedding grooves 12 .

[0026] The fully enclosed filter screen 8 is movably fixed between the two embedded grooves 12 and can be replaced according to different environments.

[0027] The pump body assembly 4 includes a plurality of pump body units 13 stacked in the axial direction, each pump body unit 13 is stacked up and down in the axial direction, including a guide vane shell 14 and an impeller 15 arranged in the guide vane shell 14, water is impacted from the center of the impeller 15 to the outer periphery of the impeller 15 at high speed, relying on the centrifugal force of the high-speed rotation of the impeller 15, and the impeller shaft 16 passes through the center holes of the impellers 15 in the plurality of pump body units 13 in turn, so that the impellers 15 in the plurality of pump body units 13 can be connected in series, as long as the impeller shaft 16 rotates, the plurality of impellers 15 are synchronously driven to rotate, which makes the assembly accuracy of the impeller shaft 16 higher, because the impeller shaft 16 actually needs to be absolutely perpendicular to the planes of the plurality of impellers 15, so we match and install the upper fixed bracket assembly 5 and the lower fixed bracket assembly 3 on the upper and lower ends of the impeller shaft 16, and the bracket body 17 on the upper fixed bracket assembly 5 and the lower fixed bracket assembly 3 matches the guide vane shell 14, and is fixed to the guide vane shell 14 by the action of the tension belt 7.

[0028] The upper fixed bracket assembly 5 has the same structure as the lower fixed bracket assembly 3, and both include a bracket body 17, a sleeve assembly 18 embedded in the central axis hole of the bracket body 17, and a sand-proof sleeve 19 is also sleeved on the impeller shaft 16. The sand-proof sleeve 19 is located below the bracket body 17. Under the impact of the water flow, the upper end surface of the sand-proof sleeve 19 is sealed and fits the lower surface of the bracket body 17; the sand-proof sleeve 19 has a taper, specifically a truncated cone structure, and the direction of the taper is opposite to the direction of the water flow, so that when water flows between the impeller shaft 16 and the bracket body 17, the water flow is guided by the sand-proof sleeve 19 and diffuses and flows around along its taper, thereby reducing the entry of mud and sand between the impeller shaft 16 and the bracket body 17.

[0029] Compared with the prior art, the utility model adopts an upper fixed bracket 2 and a lower fixed bracket 2 for connection and support at both ends of the impeller shaft 16, thereby greatly improving the concentricity between the impeller shaft 16 and the impeller 15, thereby reducing the wear between the impeller shaft 16 and the center hole 25 of the impeller 15; in addition, the impeller 15 adopts a full welding process and increases the thickness of the impeller plate 24 to achieve an integrated structure, thereby improving its bearing strength, which is 5-10 times higher than the existing bearing strength and can withstand a rotation speed of 30,000-50,000 rpm.

[0030] The sleeve assembly 18 includes a graphite sleeve 21 and a ceramic sleeve 22 embedded in the graphite sleeve 21 , and the impeller shaft 16 is inserted in the ceramic sleeve 22 ; the inner wall of the graphite sleeve 21 has a plurality of sand discharge grooves 23 evenly distributed around the circumference.

[0031] The added sleeve assembly 18 improves the wear resistance between the impeller shaft 16 and the bracket body 17, and further helps the installation accuracy of the impeller shaft 16; a sand discharge groove 23 is provided in the graphite sleeve 21, which can timely discharge the sand between the impeller shaft 16 and the center hole of the impeller 15, avoiding unnecessary wear caused by the sand being between the impeller shaft 16 and the impeller 15 for a long time.

[0032] The inner surface of the guide vane housing 14 is sprayed with a rubber layer (not marked in the figure).

[0033] The rubber layer (not marked in the figure) is elastic and also adds a layer of protection for the inner wall of the guide vane housing 14. The sand in the water is rushed to the rubber layer (not marked in the figure) by the high-speed centrifugal force of the impeller, and the rubber layer (not marked in the figure) is deformed, thereby having a buffering effect on the impact of the sand.

[0034] The working principle of the high-speed deep well pump of the utility model is explained below:

[0035] In the high-speed deep well pump of the utility model, the motor (not shown in the figure) drives the impeller shaft 16 to rotate at a high speed, and the external water enters the filter screen 8 along the radial direction of the filter screen 8, and then rushes to the lower fixed bracket 2 along the axial direction, and then enters the pump body unit 13 in turn, and finally passes through the upper fixed bracket 2 and is discharged from the water outlet flange 6. During this process, larger particles of sediment are blocked outside the filter screen 8, while water with fine sediment, when passing through the lower fixed bracket 2, is affected by the sand-proof sleeve 19, and the sediment water flows upward along the conical surface of the sand-proof sleeve 19 toward the surrounding periphery, avoiding the impact between the sand-proof sleeve 19 and the impeller shaft 16, the inside of the sleeve assembly 18, and between the ceramic sleeve 22 and the impeller shaft 16, thereby reducing the probability of sediment entering; the sediment mixed water centrifuged at high speed by the impeller 15 rushes to the inner wall of the guide vane housing 14. During long-term operation, the guide vane housing 14 is prone to damage, so we add a rubber layer (not marked in the figure) to the inner wall of the guide vane housing 14 as protection. While providing protection, it can also rebound the sediment, reducing the direct impact on the guide vane housing 14 and extending its service life; when water passes through the upper fixed bracket 2, it also has the effect of preventing sediment, just like the function of the lower fixed bracket 2.

[0036] In summary, the high-speed deep well pump of the utility model increases the thickness of the material of the impeller 15 through the full welding design of the impeller 15, and the special supports at the upper and lower ends of the impeller shaft 16 improve the concentricity with the impeller 15 during installation, thereby greatly improving the working speed while ensuring that all components can operate normally, thereby improving the performance and extending the service life.

[0037] The high-speed deep well pump provided by the embodiment of the utility model is introduced in detail above. The principle and implementation mode of the utility model are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the technical solution disclosed by the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation of the utility model.

Claims

1. A high-speed deep well pump, characterized in that: The utility model comprises a motor, a motor seat, a bracket, a lower fixed bracket assembly, a plurality of pump body assemblies, an upper fixed bracket assembly and a water outlet flange which are sequentially arranged from bottom to top. The pump body assembly comprises a plurality of pump body units superimposed along the axial direction. Each pump body unit comprises a guide vane shell and an impeller arranged in the guide vane shell. The impeller shaft passes through the central hole of the impeller in the plurality of pump body units in sequence, and the upper and lower ends of the impeller shaft are matched on the upper fixed bracket assembly and the lower fixed bracket assembly respectively. The upper fixed bracket assembly has the same structure as the lower fixed bracket assembly, and both comprise a bracket body and a sleeve assembly embedded in the central axis hole of the bracket body. The impeller shaft is also sleeved with a sand-proof sleeve, which is located below the bracket body. Under the impact of the water flow, the upper end surface of the sand-proof sleeve is sealed and fitted on the lower surface of the bracket body. The sand-proof sleeve has a taper, and the direction of the taper is opposite to the direction of the water flow, so that when the water flows between the impeller shaft and the bracket body, the water flow is guided by the sand-proof sleeve and diffuses and flows around along its taper, thereby reducing the sediment from entering between the impeller shaft and the bracket body.

2. A high-speed deep well pump according to claim 1, characterized in that: The shaft sleeve assembly comprises a graphite sleeve and a ceramic shaft sleeve embedded in the graphite sleeve, and the impeller shaft is inserted in the ceramic shaft sleeve; the inner wall of the graphite sleeve is provided with a plurality of sand discharge grooves uniformly distributed in a circumference.

3. A high-speed deep well pump according to claim 1, characterized in that: A filter screen is arranged inside the motor seat. The filter screen is cylindrical, and its upper edge and lower edge are respectively sealed and fixed on the top plate and bottom plate of the motor seat. Water flows from the outside of the filter screen toward the inside along the radial direction of the filter screen.

4. A high-speed deep well pump according to claim 3, characterized in that: Symmetrical embedding seats are arranged on the top plate and the bottom plate of the motor seat, and embedding grooves are arranged on the embedding seats. The upper edge and the lower edge of the filter screen are respectively embedded in the corresponding embedding grooves.

5. A high-speed deep well pump according to claim 1, characterized in that: A rubber layer is sprayed on the inner surface of the guide vane housing.

6. A high-speed deep well pump according to claim 1, characterized in that: The impeller is formed in one piece.

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