Silent double-end suction pump with water circulation self-cooling

Abstract

The application provides a mute double-end suction pump with water circulation self-cooling, which comprises a pump body, the pump body comprises a primary pump body and a secondary pump body, a primary impeller is arranged in the primary pump body, a secondary impeller is arranged in the secondary pump body, the primary impeller and the secondary impeller are connected through a shaft body, an electric machine shell is arranged on the outer side of the shaft body, two ends of the electric machine shell are connected with the primary pump body and the secondary pump body respectively, the shaft body is connected with the primary impeller through a primary locking nut, the shaft body is connected with the secondary impeller through a secondary locking nut, mechanical seals are arranged at the connection between the shaft body and the primary pump body and the connection between the shaft body and the secondary pump body, a motor rotor and a motor stator are arranged between the electric machine shell and the shaft body, a cooling channel is arranged in the electric machine shell, one end of the cooling channel is communicated with a water inlet, the other end of the cooling channel is communicated with a water outlet, a flange joint is arranged on the right side opening of the primary pump body, the water inlet is arranged in the center of the flange joint, and the water outlet is arranged above the secondary pump body.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pumps, and more specifically to a silent double-ended suction pump with water circulation self-cooling. Background Technology

[0002] Single-stage centrifugal pumps are a common type of pump, characterized by their simple and compact structure, suitability for conveying suspensions, high-speed operation, and valveless design. The rotation direction of a single-stage centrifugal pump is typically clockwise. Maintenance or replacement of the mechanical seal does not require disassembly of the motor and pump cover. To improve efficiency, multiple single-stage centrifugal pumps are often used simultaneously. However, this involves numerous piping installations, a large footprint, and is difficult to maintain. Furthermore, single-stage centrifugal pumps are air-cooled systems, resulting in power loss due to air resistance. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a silent double-ended suction pump with water circulation self-cooling to solve at least one of the above-mentioned technical problems.

[0004] The technical solution of this invention is: a silent double-ended suction pump with water circulation self-cooling, comprising a pump body, characterized in that the pump body comprises a primary pump body and a secondary pump body, a primary impeller is provided in the primary pump body, a secondary impeller is provided in the secondary pump body, the primary impeller and the secondary impeller are connected by a shaft, a motor housing is provided on the outside of the shaft, the two ends of the motor housing are respectively connected to the primary pump body and the secondary pump body, the shaft is connected to the primary impeller by a primary locking nut, the shaft is connected to the secondary impeller by a secondary locking nut, and mechanical seals are used at the connection between the shaft and the primary pump body and the connection between the shaft and the secondary pump body;

[0005] A motor rotor and a motor stator are provided between the motor housing and the shaft. A cooling channel is provided inside the motor housing. One end of the cooling channel is connected to the water inlet, and the other end of the cooling channel is connected to the water outlet. A flange joint is installed on the right opening of the primary pump body. The water inlet is located in the center of the flange joint. The water outlet is located above the secondary pump body. A flange baffle is covering the upper opening of the primary pump body. A cover plate is covering the left opening of the secondary pump body.

[0006] This invention reduces the outward emission of noise generated during pump operation by covering excess openings in the pump body with cover plates and obstructions. Compared with two single-stage centrifugal pumps, this invention has lower reactive power loss of the motor, smaller size, and saves space. It features a double impeller inlet, eliminating shaft blockage, improving flow velocity and efficiency, and ensuring even stress distribution at both ends of the shaft, resulting in high concentricity and a longer service life. The motor casing is self-cooled by water circulation, eliminating power loss.

[0007] Further preferably, a bearing is provided at the connection between the shaft and the motor housing. This ensures that the rotational speed of the shaft is not disturbed.

[0008] A further preferred embodiment has a bearing housing located on the outer side of the bearing near the first-stage pump body. The bearing housing is connected to a mechanical seal seat, which is connected to a mechanical seal near the first-stage pump body.

[0009] In a further preferred embodiment, key pins are provided at both ends of the shaft, and the key pins abut against the primary locking nut and the secondary locking nut, thereby achieving circumferential fixation.

[0010] Further preferably, the outer wall of the motor housing is provided with strip-shaped protrusions arranged at equal intervals in the circumference, and the length of the strip-shaped protrusions is the same as the length of the motor housing.

[0011] It can increase the heat dissipation area.

[0012] Further preferably, the cooling channel is arched, thereby increasing the cooling area.

[0013] In a further preferred embodiment, a base is installed below the pump body, and support legs are respectively provided below the primary pump body and below the secondary pump body, with the support legs contacting the base.

[0014] Further preferably, the base has a block-shaped protrusion in the center, and the lower surface of the motor housing has an outwardly inclined support member, which contacts the surface of the block-shaped protrusion.

[0015] Further preferably, pull rings are installed around the perimeter of the base for handling.

[0016] Further preferably, the installation direction of the support member is perpendicular to the installation direction of the support leg.

[0017] Further preferably, an inlet ring is provided in the body of the secondary pump.

[0018] Further preferably, a connecting cover is provided on the surface of the motor housing, and the connecting cover is connected to the cooling channel to facilitate the drainage of excess liquid. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the internal structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of the present invention from another direction;

[0022] Figure 4 This is a three-dimensional schematic diagram of the motor housing of the present invention.

[0023] In the diagram: 1 is the primary locking nut, 2 is the key pin, 3 is the mechanical seal, 4 is the mechanical seal seat, 5 is the bearing, 6 is the motor housing, 7 is the shaft, 8 is the base, 11 is the secondary locking nut, 12 is the cover plate, 13 is the flange joint, 14 is the primary pump body, 15 is the primary impeller, 16 is the flange end plate, 17 is the connecting cover, 18 is the bearing seat, 19 is the motor stator, 20 is the motor rotor, 22 is the secondary pump body, 23 is the secondary impeller, and 24 is the end ring. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figures 1-4 As shown, a silent double-ended suction pump with water circulation self-cooling includes a pump body, which comprises a primary pump body and a secondary pump body. A primary impeller 15 is housed within the primary pump body 14, and a secondary impeller 23 is housed within the secondary pump body 22. The primary and secondary impellers are connected by a shaft 7. A motor housing 6 is located on the outer side of the shaft, with the primary and secondary pump bodies connected to their respective ends. The shaft is connected to the primary impeller via a primary locking nut 1, and to the secondary impeller via a secondary locking nut 11. The connection between the shaft and the primary pump body... Mechanical seals 3 are used at the connection between the primary pump body and the secondary pump body. A motor rotor 20 and a motor stator 19 are provided between the motor housing and the shaft. A cooling channel is provided inside the motor housing. One end of the cooling channel is connected to the water inlet, and the other end of the cooling channel is connected to the water outlet. A flange joint 13 is installed on the right opening of the primary pump body. The water inlet is located in the center of the flange joint, and the water outlet is located above the secondary pump body. A flange baffle 16 covers the upper opening of the primary pump body, and a cover plate 12 covers the left opening of the secondary pump body.

[0026] This invention reduces the outward emission of noise generated during pump operation by covering excess openings in the pump body with cover plates and obstructions. Compared with two single-stage centrifugal pumps, this invention has lower reactive power loss of the motor, smaller size, and saves space. It features a double impeller inlet, eliminating shaft blockage, improving flow velocity and efficiency, and ensuring even stress distribution at both ends of the shaft, resulting in high concentricity and a longer service life. The motor casing is self-cooled by water circulation, eliminating power loss.

[0027] Further preferably, a bearing 5 is provided at the connection between the shaft and the motor housing. This ensures that the rotational speed of the shaft is not disturbed.

[0028] Further preferred, a bearing housing 18 is provided on the outer side of the bearing near the first-stage pump body, the bearing housing is connected to a mechanical seal seat 4, and the mechanical seal seat is connected to a mechanical seal near the first-stage pump body.

[0029] Further optimization involves providing key pins 2 at both ends of the shaft, which abut against the primary locking nut and the secondary locking nut, achieving circumferential fixation.

[0030] Further optimized, the outer wall of the motor housing has circumferentially spaced strip-shaped protrusions, the length of which is the same as the length of the motor housing. This increases the heat dissipation area.

[0031] Further optimization involves an arched cooling channel, which increases the cooling area.

[0032] In a further preferred embodiment, a base 8 is installed below the pump body, and support feet are provided below the first-stage pump body and the second-stage pump body, respectively, with the support feet in contact with the base.

[0033] Further preferably, the base has a block-shaped protrusion in the center, and the lower surface of the motor housing has an outwardly inclined support member, which contacts the surface of the block-shaped protrusion.

[0034] Further optimized, pull rings are installed around the four sides of the base for handling.

[0035] Further optimization is that the installation direction of the support component is perpendicular to the installation direction of the support leg.

[0036] Further optimization involves providing an inlet ring 24 within the secondary pump body.

[0037] Further preferably, a connecting cover 17 is provided on the surface of the motor housing, and the connecting cover is connected to the cooling channel to facilitate the drainage of excess liquid.

[0038] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A silent double-ended suction pump with water circulation self-cooling, comprising a pump body, characterized in that, The pump body includes a primary pump body and a secondary pump body. The primary pump body contains a primary impeller, and the secondary pump body contains a secondary impeller. The primary impeller and the secondary impeller are connected by a shaft. A motor housing is located on the outside of the shaft. The two ends of the motor housing are respectively connected to the primary pump body and the secondary pump body. The shaft is connected to the primary impeller by a primary locking nut, and the shaft is connected to the secondary impeller by a secondary locking nut. Mechanical seals are used at the connection points between the shaft and the primary pump body and between the shaft and the secondary pump body. A motor rotor and a motor stator are provided between the motor housing and the shaft. A cooling channel is provided inside the motor housing. The cooling channel is arched. One end of the cooling channel is connected to the water inlet, and the other end of the cooling channel is connected to the water outlet. A flange joint is installed on the right opening of the primary pump body. The water inlet is located in the center of the flange joint. The water outlet is located above the secondary pump body. A flange cover is provided at the top opening of the primary pump body. A cover plate is provided at the left opening of the secondary pump body.

2. The silent double-ended suction pump with water circulation self-cooling according to claim 1, characterized in that: A bearing is provided at the connection between the shaft and the motor housing.

3. The silent double-ended suction pump with water circulation self-cooling according to claim 2, characterized in that: A bearing housing is provided on the outer side of the bearing near the first-stage pump body. The bearing housing is connected to a mechanical seal seat, which is connected to a mechanical seal near the first-stage pump body.

4. The silent double-ended suction pump with water circulation self-cooling according to claim 1, characterized in that: The shaft is provided with key pins at both ends, and the key pins abut against the primary locking nut and the secondary locking nut.

5. The silent double-ended suction pump with water circulation self-cooling according to claim 1, characterized in that: The outer wall of the motor housing is provided with circumferentially spaced strip-shaped protrusions, the length of which is the same as the length of the motor housing.

6. The silent double-ended suction pump with water circulation self-cooling according to claim 1, characterized in that: A base is installed below the pump body, and support legs are respectively provided below the first-stage pump body and below the second-stage pump body, with the support legs in contact with the base.

7. The silent double-ended suction pump with water circulation self-cooling according to claim 6, characterized in that: The base has a block-shaped protrusion in the center, and the lower surface of the motor housing has an outwardly inclined support member, which is in contact with the surface of the block-shaped protrusion.

8. The silent double-ended suction pump with water circulation self-cooling according to claim 6, characterized in that: Pull rings are installed around the base.

Images