Inner sealing plate of centrifugal pump

Abstract

The utility model discloses an inner sealing plate of a centrifugal pump, which relates to the technical field of inner sealing plates of centrifugal pumps and comprises a pump body rear cover plate, a machine seal cleaning cavity is arranged on the pump body rear cover plate, a shaft hole is arranged on the pump body rear cover plate at the position of the machine seal cleaning cavity, and a machine seal spring seat is arranged on one side of the pump body rear cover plate. The optimized annular groove flow channel is formed in the rear cover plate of the pump body, so that a complete liquid baffle can be formed in the rear portion of the open impeller, liquid is prevented from being thrown out behind the impeller, and the liquid can efficiently rotate in the pump cavity and is guided into the convex flow channel along the pump cavity. Through the optimized flow channel design, the hydraulic loss is greatly reduced, so that the flow and the pressure of the pump are effectively improved, the lift of the pump is remarkably improved, and meanwhile, the pump support fixing threaded holes corresponding to the centrifugal pump upper support are formed in the pump body rear cover plate, so that alignment installation between the pump body rear cover plate and the centrifugal pump can be facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of inner sealing plates of centrifugal pumps, in particular to an inner sealing plate of a centrifugal pump. Background Art

[0002] A centrifugal pump works by centrifugally moving water through the impeller's rotation. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, causing the pump shaft to spin the impeller and water at high speed. This centrifugal motion throws the water toward the outer edge of the impeller, flowing through the pump chamber's flow channel into the pump's pressure line. An internal seal plate is required when installing a centrifugal pump.

[0003] A removable impeller of a spiral centrifugal pump with patent number CN216867017U is provided with a fixed base, a mounting seat is provided on the top of the fixed base and near the left side, a volute is provided on the top of the mounting seat, and symmetrically distributed T-shaped guide rails are provided on the top of the fixed base. The two T-shaped guide rails are movably connected to a movable plate, the top of the movable plate is rotatably connected to a rotating plate, and a motor is provided on the top of the rotating plate.

[0004] However, research has shown that the existing centrifugal pump inner seal plate still has the following defects:

[0005] A drawback of traditional convex flow channel rear covers is that the recessed area behind the open impeller is not covered, causing the fluid to be thrown out of the open impeller and rendering the open impeller ineffective. Through technological innovation and design optimization, an optimized internal seal plate for a centrifugal pump has been achieved. Utility Model Content

[0006] The disadvantage of the rear cover of the traditional convex flow channel is that the concave part behind the open impeller is not covered, causing the fluid of the open impeller to be thrown out to the rear concave part, making the open impeller ineffective. The embodiment of the present application provides an inner sealing plate of a centrifugal pump. By providing an optimized annular groove flow channel on the rear cover of the pump body, a complete liquid baffle can be formed at the rear of the open impeller to prevent the liquid from being thrown out behind the impeller. The liquid can rotate efficiently in the impeller and be introduced into the convex flow channel along the pump cavity. The hydraulic loss is greatly reduced, thereby effectively improving the flow rate and pressure of the pump, and significantly improving the pump head. At the same time, by providing a pump bracket fixing threaded hole corresponding to the upper bracket of the centrifugal pump on the rear cover of the pump body, the alignment installation between the rear cover of the pump body and the centrifugal pump can be facilitated.

[0007] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0008] An inner sealing plate of a centrifugal pump, comprising:

[0009] The rear cover of the pump body is provided with an organic seal cleaning cavity, an axial hole is provided on the rear cover of the pump body at the position of the organic seal cleaning cavity, a organic seal spring seat is provided on one side of the rear cover of the pump body, a pump body sealing groove is provided on the rear cover of the pump body, and a liquid baffle is fixed on the rear cover of the pump body.

[0010] In a possible implementation, an optimized annular groove flow channel is provided on the rear cover plate of the pump body, the inner wall of the optimized annular groove flow channel is arc-shaped, and a convex flow channel is provided on the liquid baffle plate.

[0011] The optimized annular groove flow channel provides a complete liquid baffle behind the open impeller, preventing the collected liquid from being thrown out behind the open impeller. This ensures that the liquid can rotate efficiently within the open impeller and be guided along the pump cavity into the convex flow channel, reducing hydraulic losses, thereby increasing the pump flow rate and pressure. This improves the pump head and ensures that the fluid is not negatively affected by shear, vibration, and other factors, ensuring the quality and stability of the liquid. This design can also maintain good performance and durability when transporting corrosive environments or high-temperature fluids, making it suitable for more demanding industrial applications.

[0012] The optimized annular groove flow channel design has a wide range of applications, suitable for a variety of industries and fluid types, especially for conveying high-viscosity, particulate, or sensitive liquids. It efficiently handles not only traditional water-based fluids, but also complex liquid media such as dairy products, chemical solutions, food and beverages, and pharmaceuticals. In fluid conveying systems requiring high precision and high efficiency, it ensures that the fluid is not negatively impacted by shear, vibration, and other factors, ensuring fluid quality and stability. This design also maintains excellent performance and durability in corrosive environments or for conveying high-temperature fluids, making it suitable for even more demanding industrial applications.

[0013] The convex flow channel has the function of enhancing the momentum of the inlet fluid, reducing the pressure difference at the liquid inlet, reducing the cavitation margin of the pump, and improving the suction at the pump inlet, thereby reducing the circumferential flow of the liquid in the pump chamber and forcing the viscous medium to flow toward the outlet. By increasing the pressure, a high negative pressure suction state is formed at the inlet. At the same time, this design is highly durable and has the advantages of being compact, lightweight, easy to clean and low in energy consumption.

[0014] Because the convex flow channel design optimizes the pump's hydraulic performance and reduces internal liquid flow turbulence, this directly reduces wear on pump components, thereby increasing the pump's durability and service life. By reducing problems such as cavitation, pressure differential fluctuations, and liquid turbulence, the pump can maintain stable performance under long-term high-load operation, reducing failure rates and maintenance requirements. For applications with high loads or continuous operation (such as dairy processing, pharmaceuticals, and chemicals), reducing downtime and maintenance costs is crucial. Extending the service life of equipment is key to improving production efficiency and reducing total cost of ownership.

[0015] The design also effectively reduces noise and vibration, reducing the mechanical burden and ambient noise during pump operation, contributing to a quieter and more comfortable working environment. Furthermore, the low noise and vibration operation extends the service life of the pump and related equipment, reducing maintenance costs and downtime.

[0016] In summary, the present invention has at least one of the following beneficial technical effects:

[0017] 1. An optimized annular groove flow channel is created on the rear cover of the pump body to create a complete liquid baffle behind the open impeller, preventing liquid from being thrown out behind the impeller. Liquid can efficiently rotate within the impeller and be guided along the pump cavity into the convex flow channel. This optimized flow channel design significantly reduces hydraulic losses, effectively increasing pump flow and pressure, and significantly improving pump head.

[0018] 2. By setting up a convex flow channel, the convex flow channel has the effect of enhancing the momentum of the inlet fluid, reducing the pressure difference at the liquid inlet, reducing the cavitation margin of the pump, and improving the suction of the pump inlet, thereby reducing the circumferential flow of the liquid in the pump chamber and forcing the viscous medium to flow toward the outlet. By increasing the pressure, a high negative pressure suction state is formed at the inlet. At the same time, this design is highly durable and has the advantages of being compact, lightweight, easy to clean and low energy consumption.

[0019] 3. By arranging pump bracket fixing threaded holes corresponding to the upper bracket of the centrifugal pump on the rear cover of the pump body, the alignment installation between the rear cover of the pump body and the centrifugal pump can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a side view of the overall structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the back structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the side sectional structure of the utility model;

[0024] Figure 5 This is a front view of the front structure of the utility model;

[0025] Figure 6 This is a schematic diagram of the water outlet direction of the utility model;

[0026] Figure 7 Schematic diagram of the original liquid baffle.

[0027] Figure markings: 1. Pump body rear cover; 2. Shaft hole; 3. Mechanical seal cleaning chamber; 4. Pump body fixing hole; 5. Optimized annular groove flow channel; 6. Spring seat fixing threaded hole; 7. Mechanical seal spring seat; 8. Pump bracket fixing threaded hole; 9. Convex flow channel; 10. Pump body sealing groove; 11. Liquid baffle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the present invention to clearly and completely describe the technical solution of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The instrument placement rack involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] This embodiment introduces a specific structure of the inner sealing plate of a centrifugal pump. Figure 1-Figure 7 As shown, a centrifugal pump inner sealing plate includes:

[0030] The pump body rear cover plate 1 has an organic seal cleaning chamber 3, an axial hole 2 is provided on the pump body rear cover plate 1 at the position of the organic seal cleaning chamber 3, a organic seal spring seat 7 is provided on one side of the pump body rear cover plate 1, a pump body sealing groove 11 is provided on the pump body rear cover plate 1, and a liquid baffle plate 10 is fixed on the pump body rear cover plate 1.

[0031] Among them, when the pump body rear cover plate 1 is connected to the centrifugal pump, the pump body rear cover plate 1 is provided with an optimized annular groove flow channel 5, the inner wall of the optimized annular groove flow channel 5 is arc-shaped, and a convex flow channel 9 is provided on the liquid baffle 10.

[0032] The optimized annular groove flow channel 5 provides a complete liquid baffle behind the open impeller, preventing the collected liquid from being thrown out behind the open impeller. This ensures that the liquid can rotate efficiently within the open impeller and be guided along the pump cavity into the convex flow channel 9, reducing hydraulic losses, thereby increasing the pump flow rate and pressure. This improves the pump head and ensures that the fluid is not negatively affected by shear, vibration, and other factors, ensuring the quality and stability of the liquid. This design can also maintain good performance and durability even when transporting corrosive environments or high-temperature fluids, making it suitable for more demanding industrial applications.

[0033] The optimized annular groove flow channel 5 design has a wide range of applications, suitable for a variety of industries and fluid types, especially for conveying high-viscosity, particulate, or sensitive liquids. It can efficiently handle not only traditional water-based liquids, but also complex liquid media such as dairy products, chemical solutions, food and beverages, and pharmaceuticals. In fluid conveying systems requiring high precision and high efficiency, it ensures that the fluid is not negatively impacted by shear, vibration, and other factors, ensuring the quality and stability of the liquid. This design also maintains excellent performance and durability for conveying fluids in corrosive environments or at high temperatures, making it suitable for even more demanding industrial applications.

[0034] The convex flow channel 9 has the function of enhancing the momentum of the inlet fluid, reducing the pressure difference at the liquid inlet, reducing the cavitation margin of the pump, and improving the suction at the pump inlet, thereby reducing the circumferential flow of the liquid in the pump chamber and forcing the viscous medium to flow toward the outlet. By increasing the pressure, a high negative pressure suction state is formed at the inlet. At the same time, this design is highly durable and has the advantages of being compact, lightweight, easy to clean and low in energy consumption.

[0035] The convex flow channel 9 optimizes the pump's hydraulic performance and reduces internal fluid flow turbulence, which directly reduces wear on pump components, thereby increasing pump durability and service life. This reduces cavitation, pressure fluctuations, and fluid turbulence, allowing the pump to maintain stable performance even under extended, high-load operation, reducing failure rates and maintenance requirements. For applications with high loads or continuous operation (such as dairy processing, pharmaceuticals, and chemicals), reducing downtime and maintenance costs is crucial. Extending equipment life is key to improving production efficiency and lowering total cost of ownership.

[0036] The design also effectively reduces noise and vibration, reducing the mechanical burden and ambient noise during pump operation, contributing to a quieter and more comfortable working environment. Furthermore, the low noise and vibration operation extends the service life of the pump and related equipment, reducing maintenance costs and downtime.

[0037] In addition, a plurality of pump body fixing holes 4 are provided on the pump body rear cover plate 1 , and bolts can pass through the plurality of pump body fixing holes 4 , so as to facilitate fixing the pump body rear cover plate 1 to the centrifugal pump by means of bolts.

[0038] It is worth noting that there is a gap between the shaft and the shaft hole 2. A spring seat fixing threaded hole 6 is provided on the rear cover plate 1 of the pump body, through which a screw can pass through the machine seal spring seat 7. The spring seat fixing threaded hole 6 is threadedly connected to the screw to facilitate fixing the machine seal spring seat 7 to the inner seal plate body. The machine seal spring seat 7 can seal the gap between the shaft holes 2.

[0039] Furthermore, a pump bracket fixing threaded hole 8 is provided on the pump body rear cover plate 1 , and the pump bracket fixing threaded hole 8 can be plugged into the upper bracket of the centrifugal pump, so as to facilitate the positioning of the pump body rear cover plate 1 .

[0040] When the staff needs to fix the pump body rear cover plate 1 to the centrifugal pump, they fix the mechanical seal spring seat 7 to the inner seal plate with screws, align the pump bracket fixing threaded hole 8 on the seal plate with the bracket on the centrifugal pump and insert it. At this time, the shaft passes through the mechanical seal spring seat 7 and the threaded hole, and then uses bolts to pass through the pump body fixing hole 4 to fix the pump body rear cover plate 1 to the centrifugal pump body. During use, the liquid can efficiently rotate in the impeller and be introduced into the optimized annular groove flow channel 5 along the pump cavity, greatly reducing hydraulic loss, thereby effectively improving the pump flow rate and pressure, and significantly increasing the pump head. At the same time, the optimized annular groove flow channel 5 has the effect of enhancing the momentum of the inlet fluid, reducing the pressure difference at the liquid inlet, reducing the pump cavitation margin, and improving the suction of the pump inlet. It reduces the annular flow of liquid in the pump cavity, forcibly diverts the viscous medium to the outlet direction, increases the pressure, and forms a high negative pressure suction state at the inlet.

[0041] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A centrifugal pump inner sealing plate, characterized in that: include: A pump body rear cover (1) is provided with an organic seal cleaning cavity (3) on the pump body rear cover (1), an axial hole (2) is provided on the pump body rear cover (1) at the position of the organic seal cleaning cavity (3), a organic seal spring seat (7) is provided on one side of the pump body rear cover (1), a pump body sealing groove (11) is provided on the pump body rear cover (1), and a liquid baffle (10) is fixed on the pump body rear cover (1).

2. The inner sealing plate of a centrifugal pump according to claim 1, characterized in that: An optimized annular groove flow channel (5) is provided on the pump body rear cover plate (1), the inner wall of the optimized annular groove flow channel (5) is arranged in an arc shape, and a convex flow channel (9) is provided on the liquid baffle plate (10).

3. The inner sealing plate of a centrifugal pump according to claim 1, characterized in that: A plurality of pump body fixing holes (4) are provided on the pump body rear cover plate (1), and bolts can pass through the interior of the plurality of pump body fixing holes (4).

4. The inner sealing plate of a centrifugal pump according to claim 1, characterized in that: The pump body rear cover plate (1) is provided with a spring seat fixing threaded hole (6), through which a screw can penetrate the machine seal spring seat (7), and the spring seat fixing threaded hole (6) is threadedly connected to the screw.

5. The inner sealing plate of a centrifugal pump according to claim 1, characterized in that: A pump bracket fixing threaded hole (8) is provided on the pump body rear cover plate (1), and the pump bracket fixing threaded hole (8) can be plugged into the centrifugal pump upper bracket.

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