Non-overload characteristic centrifugal pump impeller based on carbon fiber material

Abstract

The utility model relates to a non-overload characteristic centrifugal pump impeller based on carbon fiber materials, which comprises a cover plate and blades made of carbon fiber materials. Gaps on two sides are formed between the tail sections of the blades and the cover plate; the cover plate is flat and straight in the tail end area of the blade and is vertical to the axis; and the tail ends of the blades are transited to be sharp. The gap is arranged between the tail section of the blade and the cover plate, and the blade is made of carbon fibers, so that different blade outlet placing angles can be automatically changed under different flow loads by means of the toughness of the carbon fibers. The tail end of the blade made of the carbon fiber material can automatically adjust the angle according to the load condition, and when the load of the pump is increased, the outlet angle of the blade is automatically reduced, so that the lift and the flow are reduced, and the power protection is realized; when the load is reduced, the blade outlet angle is increased, and the lift and the flow are increased to guarantee the working efficiency of the pump. The tail ends of the blades are in sharp transition, so that wake vortexes of the blades can be effectively eliminated, the efficiency of the pump is improved, and vibration and noise of the pump are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of no overload characteristic centrifugal pump impellers, more particularly to a kind of gap being equipped with in blade tail section and cover plate, and blade is made of carbon fiber, rely on the tenacity of carbon fiber, automatically transform different blade outlet installation angle based on carbon fiber material no overload characteristic centrifugal pump impeller at different flow load. BACKGROUND

[0002] Centrifugal pumps are widely used in various fluid delivery processes, especially in the fields of industry, agriculture, water supply, petroleum, and chemical engineering, playing a crucial role.

[0003] Traditional centrifugal pump impellers are usually made of metal materials, which have good strength and corrosion resistance but suffer from heavy weight and low fatigue resistance. More importantly, existing centrifugal pump impeller designs are generally fixed, with unchangeable blade outlet angles, which cannot be automatically adjusted according to actual load, leading to over-power or failure to meet performance curve requirements under certain working conditions.

[0004] Compared with traditional metal materials, carbon fiber materials have unique advantages in mechanical properties, lightweight, designability, and fatigue resistance. SUMMARY

[0005] To address the above problems, the main purpose of the utility model is to provide a kind of no overload characteristic centrifugal pump impeller based on carbon fiber material, gap is equipped with in blade tail section and cover plate, and blade is made of carbon fiber, rely on the tenacity of carbon fiber, automatically transform different blade outlet installation angle based on carbon fiber material no overload characteristic centrifugal pump impeller at different flow load.

[0006] The utility model solves the above technical problems by the following technical solutions: a kind of no overload characteristic centrifugal pump impeller based on carbon fiber material, the no overload characteristic centrifugal pump impeller based on carbon fiber material includes: cover plate and blade, the blade is the blade of carbon fiber material;The tail section of the blade is equipped with double-sided gap with cover plate;The cover plate is straight in blade tail end region and perpendicular to axis;The blade is transitioned to sharp type at tail end.

[0007] In the specific embodiment of the utility model, the outlet diameter to inlet diameter ratio of the centrifugal pump impeller is greater than 2.

[0008] In the specific embodiment of the utility model, the outlet diameter of the centrifugal pump impeller ranges from 300 to 400 mm, and the inlet diameter of the impeller ranges from 150 to 200 mm.

[0009] In the specific embodiment of the utility model, the number of blades of the centrifugal pump impeller ranges from 3 to 9.

[0010] The width of the gap ranges from 0.2mm to 2mm.

[0011] In the embodiment of the utility model, the centrifugal pump impeller is a single-suction centrifugal impeller.

[0012] The positive progress effect of the utility model lies in: the centrifugal pump impeller based on carbon fiber material provided by the utility model has the following advantages compared with common technology: the utility model is provided with a gap between the tail section of the blade and the cover plate, and the blade is made of carbon fiber, and the blade outlet angle is automatically changed under different flow loads by the toughness of the carbon fiber.

[0013] The tail end of the blade made of carbon fiber material can automatically adjust the angle according to the load condition, and when the load of the pump increases, the blade outlet angle is automatically reduced, so as to reduce the lift and flow, and then realize power protection; when the load decreases, the blade outlet angle increases, the lift and flow increase to ensure the working efficiency of the pump. The transition of the tail end of the blade to the pointed type can effectively eliminate the blade tail vortex, improve the efficiency of the pump, and reduce the vibration and noise of the pump. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model.

[0015] Figure 2 It is working schematic view A of the utility model.

[0016] Figure 3 It is working schematic view B of the utility model.

[0017] The following is the name corresponding to the mark in the utility model:

[0018] Cover plate 1, blade 2, gap 3, pointed type 201. DETAILED DESCRIPTION

[0019] The preferred embodiment of the utility model is given below in combination with the drawings to specifically describe the technical scheme of the utility model.

[0020] Figure 1 It is a whole structure schematic view of the utility model, as shown in Figure 1 The utility model discloses a kind of no overload characteristic centrifugal pump impellers based on carbon fiber material, and the no overload characteristic centrifugal pump impeller based on carbon fiber material includes: cover plate 1 and blade 2, blade 2 is the blade of carbon fiber material;Tail section of blade 2 and cover plate 1 are provided with double-sided gap 3;Cover plate 1 is straight in tail end area of blade 2 and vertical to axis;Blade 2 is transitioned to pointed type in tail end.

[0021] In the specific implementation process of the utility model, the ratio of the outlet diameter to the inlet diameter of the impeller is greater than 2, and according to the size of the pump and the requirements of the use occasion, the above value can be changed into other values or ranges.

[0022] In the specific implementation process of the utility model, the outlet diameter of the impeller is 300-400mm, and the inlet diameter of the impeller is 150-200mm, and according to the size of the pump and the requirements of the use occasion, the above values can be changed into other values or ranges.

[0023] In the specific implementation process, the number of the centrifugal pump impeller blades is limited, and is usually 3-9. In the diagram given by the utility model, the number of the blades 2 is 5, and the number of the blades 2 is 5, as shown in Figure 2 and 3 .

[0024] In the specific implementation process, the width of the gap 3 of the utility model ranges from 0.2mm to 2mm, and according to the size of the pump and the requirements of the use occasion, the above value can be changed into other values or ranges.

[0025] In the specific implementation process, the centrifugal pump impeller of the utility model is a single-suction centrifugal impeller.

[0026] The following is the specific working process of the utility model:

[0027] In the small flow area, the tail section angle of the blade 2 is close to the original angle, as shown in Figure 2 2 ， , with the increase of the flow, the power transmitted by the impeller increases, and the tail section angle of the blade 2 decreases, as shown in Figure 3 2 ，， . According to the design principle of the centrifugal pump impeller, the decrease of the outlet angle can make the performance curve of the impeller steep, and the power decreases. Thus, the steep drop of the performance curve, the absence of hump and the power protection of the motor are realized.

[0028] The cover plate is flat and perpendicular to the axis, so that the gap between the blade and the cover plate can always remain constant when the tail end of the blade is deformed in different flow conditions.

[0029] The transition of the tail end of the blade into a sharp type can effectively eliminate the blade tail vortex, improve the efficiency of the pump and reduce the vibration and noise of the pump.

[0030] The utility model overcomes the defects that the gap is not provided between the centrifugal pump blade and the cover plate in the prior art, and the setting angle of the blade is always fixed, the utility model is provided with a gap between the tail section of the blade and the cover plate, and the blade is made of carbon fiber, and the setting angle of the blade outlet is automatically changed under different flow loads by relying on the toughness of the carbon fiber.

[0031] Since the blade front end is rigidly connected with the cover plate, a gap is arranged between the tail part and the cover plate, and the blade is made of carbon fiber material with good toughness, which is equivalent to a spring plate, the greater the force received, the greater the bending degree, and the greater the bending degree, the smaller the outlet angle. When the pump is working, the reaction force of water received is small at small flow, the bending degree of the blade tail part is small, the outlet angle is large, the reaction force of water received is large at large flow, the bending degree of the blade tail part is large, the outlet angle is small, which is a self-adaptive mechanism.

[0032] The carbon fiber material in the utility model has the advantages of light weight, high strength, corrosion resistance, fatigue resistance and the like, the impeller manufactured by using the carbon fiber material can effectively improve the service life and fatigue resistance of the impeller while reducing the overall mass. The tail end of the blade manufactured based on the carbon fiber material can automatically adjust the angle according to the load condition, when the load of the pump increases, the blade outlet angle automatically decreases, thereby reducing the lift and flow, and further realizing power protection; when the load decreases, the blade outlet angle increases, the lift and flow are increased to ensure the working efficiency of the pump. The blade tail end is transitioned to a sharp type, which can effectively eliminate the blade tail vortex, improve the efficiency of the pump, and reduce the vibration and noise of the pump.

[0033] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only to illustrate the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, these changes and improvements all fall within the scope of the utility model claimed, the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A carbon fiber material based non-overloading characteristic centrifugal pump impeller, characterized by: The carbon fiber material based non-overload characteristic centrifugal pump impeller comprises a cover plate and blades, the blades are carbon fiber material blades, tail sections of the blades are provided with double-sided gaps with the cover plate, the cover plate is flat and perpendicular to the axis at the tail end area of the blades, and the blades are transitioned to a pointed type at the tail end.

2. A carbon fiber material based non-overloading characteristic centrifugal pump impeller according to claim 1, characterized in that: The ratio of the outlet diameter to the inlet diameter of the centrifugal pump impeller is greater than 2.

3. The carbon fiber material based non-overloading characteristic centrifugal pump impeller according to claim 1, characterized in that: The outlet diameter of the centrifugal pump impeller ranges from 300 to 400 mm, and the inlet diameter of the impeller ranges from 150 to 200 mm.

4. The carbon fiber material based non-overloading characteristic centrifugal pump impeller according to claim 1, characterized in that: The number of blades of the centrifugal pump impeller ranges from 3 to 9.

5. The carbon fiber material based non-overloading characteristic centrifugal pump impeller according to claim 1, characterized in that: The width of the gap ranges from 0.2 to 2 mm.

6. The carbon fiber material based non-overloading characteristic centrifugal pump impeller according to claim 1, characterized in that: The centrifugal pump impeller is a single suction centrifugal impeller.

Images