A flexible impeller seawater pump

Abstract

The present invention relates to a water pump, in particular to a flexible impeller seawater pump. It includes a pump body with a water inlet at the bottom and a water outlet at the top. An impeller shaft and a flexible impeller provided on the impeller shaft are arranged inside the pump body. An end cover is provided on the pump body. Partition plates for adjusting the axial compression amount of the impeller are provided at both ends of the impeller. In the water inlet end area of the water pump, two annular grooves are provided on the partition plates, which are respectively communicated with the root and the top of the impeller blade groove. Fan-shaped grooves are respectively opened on the back of the partition plates, that is, on the pump body and the cover plate, to connect the two annular grooves on the partition plates. The annular groove at the top of the partition plate is directly communicated with the water inlet of the water pump. The purpose of the present invention is to provide a flexible impeller seawater pump. By adding connecting grooves on the partition plates at both ends of the impeller, the water inlet of the water pump is connected with the root of the impeller blade groove under the condition of no centrifugal force influence, and the fluid at the water inlet is introduced into the root of the blade groove where negative pressure appears due to centrifugal force influence, so as to improve the flow output and efficiency of the seawater pump.

Description

Technical Field

[0001] The present invention relates to a water pump, in particular to a flexible impeller seawater pump. Background Art

[0002] The flexible impeller seawater pump includes a pump body, an impeller arranged in the pump body and an impeller arranged on the impeller shaft. A cover plate is provided on the pump body. The impeller is a rubber impeller. The main principle is that the rubber impeller is placed in the pump body and is driven to rotate by gears. During the rotation of the impeller, the water at the water inlet is pressed out of the seawater pump to realize circulating water supply.

[0003] Since the impeller is a rubber impeller, it is elastic. Under the action of water pressure, a large gap will be generated between the blades and the pump body. The gap generates a large flow and is transmitted to the end closed blades, eventually forming a large leakage, resulting in insufficient performance of the water pump. To address this defect, the present invention proposes an improvement. Summary of the Invention

[0004] In order to overcome the shortcomings of the background technology, the purpose of the present invention is to provide a flexible impeller seawater pump. By adding two annular grooves on the partitions at both ends of the impeller, the water inlet of the water pump is connected to the root of the impeller blade wing groove without the influence of centrifugal force, and the water inlet fluid is introduced into the root of the blade wing groove where negative pressure occurs due to the influence of centrifugal force, thereby improving the flow output and efficiency of the seawater pump.

[0005] The technical solution adopted by the present invention is: a flexible impeller seawater pump, including a pump body, a water inlet at the bottom of the pump body, a water outlet at the top, an impeller shaft and a rubber impeller arranged on the impeller shaft, an end cover on the pump body, and a pressure reducing mechanism capable of controlling the gap between the rubber impeller and the pump body.

[0006] The present invention is further configured as follows: the pressure reducing mechanism includes a partition and a connecting groove, the pump body is provided with an impeller cavity, there are two partitions, the two partitions are respectively arranged on both sides of the impeller cavity, one end of the partition is in contact with the pump body, and the other end is in contact with the rubber impeller, the connecting groove is provided on the partition and the connecting grooves on the two partitions correspond to each other.

[0007] The present invention is further configured such that: each partition is provided with two connecting grooves, and the connecting grooves on each partition are arranged side by side.

[0008] The present invention is further configured as follows: end cover connecting grooves are respectively provided on the end surfaces of the pump body and the end cover that contact the partition plate and correspond to the connecting grooves, and the end cover connecting grooves are connected to the connecting grooves.

[0009] The present invention is further configured such that: a support block that contacts the partition is provided in the end cover connecting groove.

[0010] The present invention is further configured as follows: the connecting groove is an arc-shaped groove, and the end cover connecting groove is a fan-shaped groove.

[0011] The present invention is further configured as follows: it further includes a guiding block, the guiding block is arranged between the pump body and the end cover, the rubber impeller is arranged inside the guiding block, and a number of guiding block water outlets communicating with the water outlet are provided on the guiding block.

[0012] The present invention is further configured as follows: the guiding block is semi-cylindrical, and the guiding block is fixed to the pump body by screws.

[0013] The beneficial effects of the present invention are as follows: the water inlet area at the bottom of the pump body is an inlet low-pressure uniform area, the water outlet area at the top is an outlet high-pressure area, and the area inside the impeller cavity is a pressure-maintaining area. By adding two annular grooves on the partitions at both ends of the impeller, the water inlet of the water pump is connected to the root of the impeller blade groove under the condition of no centrifugal force influence, and the fluid at the water inlet is introduced into the root of the blade groove where negative pressure appears due to centrifugal force influence, improving the flow output and efficiency of the seawater pump, controlling the overall leakage amount, and further reducing the pressure difference on both sides of a single tooth of the impeller blade, so as to control the gap between the rubber impeller blade and the pump body, prevent the gap between the impeller blade and the pump body from being too large, and thus obtain a better sealing effect.

[0014] The following further describes the embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0015] Figure 1 is the front view of the present invention;

[0016] Figure 2 is the front view of the present invention with the end cover removed;

[0017] Figure 3 is in the present invention Figure 1 view in the Q direction;

[0018] Figure 4 is in the present invention Figure 1 A-A cross-sectional view;

[0019] Figure 5 is the partial structure diagram of the present invention;

[0020] Figure 6 is the partial structure diagram of the present invention;

[0021] Figure 7 is the partial structure diagram of the present invention. Detailed Embodiments

[0022] As Figures 1-7As shown, the present invention provides a technical solution adopted by the present invention: a flexible impeller seawater pump, including a pump body 1, a water inlet 11 at the bottom of the pump body 1, a water outlet 12 at the top, an impeller shaft 2 and a rubber impeller 3 arranged on the impeller shaft 2, an end cover 4 on the pump body 1, and a pressure reducing mechanism capable of controlling the gap between the rubber impeller 3 and the pump body 1. Due to the provision of the pressure reducing mechanism, the pressure reducing mechanism can reduce the pressure difference on both sides of the blade teeth on the impeller, thereby controlling the gap between the blade wings of the rubber impeller and the pump body, thereby achieving an ideal sealing effect and significantly improving the performance of the seawater pump.

[0023] The pressure-reducing mechanism includes a partition 5 and a communication groove 51. The pump body 1 is provided with an impeller chamber 13. There are two partitions 5, one on each side of the impeller chamber 13. One end of the partition 5 contacts the pump body or end cover 4, and the other end contacts the rubber impeller. The communication groove 51 is provided on the partition 5, and the communication grooves 51 on the two partitions 5 correspond to each other. The end surfaces of the pump body 1 and the end cover 4 that contact the partition 5 are provided with end cover communication grooves 52 corresponding to the communication grooves 51. The end cover communication grooves 52 are in communication with the communication grooves 51. The water inlet area at the bottom of the pump body 1 is the inlet low-pressure area, the water outlet area at the top is the outlet high-pressure area, and the area within the impeller chamber 13 is the pressure-maintaining area. Due to the arrangement of the connecting groove 51 and the end cover connecting groove 52, when water enters the impeller chamber 13, the water will enter the end cover connecting groove 52 through the connecting groove 51, increasing the communication channel between the low-pressure area and the pressure-maintaining area, which is equivalent to increasing the overall area of the pressure-maintaining area. In this way, when the water in the pressure-maintaining area flows to the outlet high-pressure area, its pressure can be reduced, thereby reducing the pressure difference on both sides of the single tooth of the blade 31 on the rubber impeller 3, thereby controlling the gap between the blade 31 of the rubber impeller 3 and the pump body 1. The overall leakage is controlled by the connecting groove 51 and the end cover connecting groove 52, preventing the gap between the blade 31 of the rubber impeller 3 and the pump body 1 from being too large, thereby achieving a better sealing effect. The present invention is further configured as follows: each partition is provided with two connecting grooves, and the connecting grooves on each partition are arranged side by side.

[0024] The end cover connecting groove 52 is provided with a support block 54 that contacts the partition 5. The partition 5 contacts the support block 54, which protects the partition 5 and prevents the partition 5 from being damaged by the pressure of the water.

[0025] The connecting groove 51 is an arc-shaped groove, and the end cover connecting groove 52 is a fan-shaped groove. The fan-shaped groove can increase the area of the pressure holding zone, and of course it can also be other shapes.

[0026] The diameter of the connecting groove 51 and the end cover connecting groove 52 is between 10-20 cm. 10-20 cm has a better effect. If it is too small, the pressure reduction is insufficient, and if it is too large, the pressure reduction is too large and the performance of the water pump will be affected.

[0027] It further includes a guide block 6 which is arranged between the pump body 1 and the end cover 4. The rubber impeller 3 is arranged inside the guide block 6. The guide block 6 is provided with a plurality of guide block water outlets 61 which are communicated with the water outlet 12. The guide block 6 forms a compression space in the impeller cavity 13. The gear 7 on the pump body 1 drives the impeller shaft 2 to rotate and then drives the rubber impeller 3 to rotate. When the rubber impeller 3 passes through the guide block 6, it starts to compress the space and presses the water out of the pump body through the guide block water outlets 61. After the rubber impeller 3 passes through the guide block 6, the leaf fins extend to the free state, and the water inlet of the water pump starts to enter new water, realizing cyclic water supply.

[0028] The described guide block 6 is semi-cylindrical, and the guide block 6 is fixed to the pump body 1 by screws.

[0029] The main feature of the present invention is that partitions for adjusting the axial compression amount of the impeller are provided at both ends of the impeller. The partitions are installed by screws, so the partitions can be replaced as vulnerable parts. In the water inlet end area of the water pump, the partitions are provided with two annular grooves, namely communication grooves, which penetrate through the roots and tops of the impeller leaf fin grooves respectively. On the back of the partitions, that is, on the pump body and the cover plate, fan-shaped grooves (end cover communication grooves) are respectively opened to connect the two annular grooves on the partitions. Support blocks are provided in the middle of the fan-shaped communication grooves of the pump body and the cover plate to overcome the possible deformation of the partitions. The annular groove at the top of the partition is directly communicated with the water inlet of the water pump. By adding two annular grooves on the partitions at both ends of the impeller, the water inlet of the water pump is connected to the root of the impeller leaf fin groove under the condition of no centrifugal force influence, and the inlet fluid is introduced into the root of the leaf fin groove where negative pressure appears due to centrifugal force influence, improving the flow output and efficiency of the seawater pump.

[0030] Dear technicians, please note that although the present invention has been described according to the above specific embodiments, the inventive concept of the present invention is not limited to this. Any modification using the inventive concept of the present invention will be included in the protection scope of the patent right of this patent.

Claims

1. A flexible impeller seawater pump comprising a pump body, a water inlet at the bottom of the pump body, a water outlet at the top of the pump body, an impeller shaft and a rubber impeller disposed on the impeller shaft, and an end cover on the pump body, characterized in that: The pump body is provided with a pressure-reducing mechanism capable of controlling the gap between the rubber impeller and the pump body; the pressure-reducing mechanism includes a partition and a connecting groove; the pump body is provided with an impeller chamber, the pump body has two partitions, and the two partitions are respectively arranged on both sides of the impeller chamber, one end of the partition contacts the pump body and the other end contacts the rubber impeller; the connecting groove is provided on the partition, and the connecting grooves on the two partitions correspond to each other; each partition is provided with two connecting grooves, and the connecting grooves on each partition are arranged side by side; an end cover connecting groove is provided on the end surface of the pump body that contacts one of the partitions at a position corresponding to the connecting groove, and an end cover connecting groove is provided on the end surface of the end cover that contacts the other partition at a position corresponding to the connecting groove, and the end cover connecting groove is connected to the connecting groove; a support block is provided in the end cover connecting groove, which contacts the partition; and the pump body further includes a guide block, the guide block being provided between the pump body and the end cover, the rubber impeller being provided in the guide block, and the guide block being provided with a plurality of guide block outlets that are connected to the water outlet.

2. A flexible impeller seawater pump according to claim 1, characterized in that: The connecting groove is an arc-shaped groove, and the connecting groove of the end cover is a fan-shaped groove.

3. The flexible impeller seawater pump according to claim 1, characterized in that: The guide block is semi-cylindrical and is fixed to the pump body by screws.

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