CN-121678416-B - Automatic detection system and method for impeller strength of multistage centrifugal pump

Abstract

The invention belongs to the technical field of centrifugal pump production, and particularly relates to an automatic detection system and method for the strength of an impeller of a multistage centrifugal pump, comprising a lifting and overturning assembly, a horizontal plate seat, a clamping assembly, a cover plate strength detection assembly and a blade strength detection assembly, wherein the clamping assembly for clamping and locking a combined closed impeller is arranged below the horizontal plate seat; the horizontal plate seat is provided with a cover plate strength detection assembly for detecting the strength of the front cover plate, the rear cover plate or the annular rotating plate, and the horizontal plate seat is provided with a blade strength detection assembly for detecting the strength of blades in different rotation directions. The invention has reasonable design and meets the automatic detection requirements of the cover plate and the blades in the combined closed impeller under different rotation directions.

Inventors

• SHI YONG

Assignees

• 常州市洛锐电器有限公司

Dates

Publication Date

20260508

Application Date

20260211

Claims (8)

1. 1. The automatic detection system for the strength of the impeller of the multistage centrifugal pump is characterized by comprising a lifting turnover assembly, a horizontal plate seat, a clamping assembly, a cover plate strength detection assembly and a blade strength detection assembly, wherein the clamping assembly for clamping and locking a combined closed impeller is arranged below the horizontal plate seat, the lifting turnover assembly for driving the clamping assembly to lift and horizontally turn is arranged on the upper side of the horizontal plate seat, and the combined closed impeller consists of a blade, a front cover plate, a rear cover plate, an annular rotating plate, a positioning bolt and a locking push rod; the horizontal plate seat is provided with a cover plate strength detection assembly for detecting the strength of the front cover plate, the rear cover plate or the annular rotating plate, and the horizontal plate seat is provided with a blade strength detection assembly for detecting the strength of blades in different rotation directions; The combined closed impeller comprises a front cover plate, a rear cover plate, a plurality of blades, a positioning bolt, an annular rotating plate and a plurality of locking push rods, wherein the blades are arranged in the combined closed impeller and distributed in an annular array, the front cover plate and the rear cover plate are installed on two sides of the blades through the positioning bolt, the inner end parts of the blades are provided with rotary positioning through the positioning bolt, the outer side of the rear cover plate is provided with the annular rotating plate for driving the outer end parts of the blades to rotate around the inner end parts, and the annular rotating plate is provided with the plurality of locking push rods for locking the outer end parts of the blades and the circumferential positions of the rear cover plate; The blade strength detection assembly comprises a hanging vertical plate vertically fixed on a horizontal plate seat, and a toggle mechanism, a steel ball horizontal displacement mechanism and a horizontal stamping mechanism are arranged in the hanging vertical plate; The stirring mechanism consists of a first horizontal push rod, a bracket, a stirring motor and a stirring gear, wherein the stirring motor is arranged at the movable end of the first horizontal push rod through the bracket, and the stirring gear matched with the stirring tooth socket is arranged at the output end of the stirring motor; The steel ball horizontal displacement mechanism comprises a steel ball carrier plate, a second steel ball, a second horizontal push rod and a guide joint pipe, wherein the second steel ball capable of horizontally displacing in a small range is clamped in the steel ball carrier plate, the steel ball carrier plate is driven by the second horizontal push rod to horizontally displace, and the guide joint pipe can provide horizontal guide in the displacement process of the steel ball carrier plate; the horizontal stamping mechanism consists of a third horizontal push rod and a punch head arranged at the movable end of the third horizontal push rod, and the punch head and the hammer rod are respectively provided with a spherical groove matched with the corresponding steel ball.
2. 2. The automatic detection system for the strength of the impeller of the multistage centrifugal pump according to claim 1, wherein the blade comprises a blade body, end posts are arranged at two ends of the blade body, positioning rotating holes matched with positioning bolts are formed in the end posts positioned at the inner side, a limiting rod is arranged in the end posts positioned at the outer side in a penetrating manner, and a push head is arranged at the bottom end of the limiting rod; The front cover plate comprises a front cover plate body, a water inlet is formed in the center of the front cover plate body, a plurality of upper limit arc grooves matched with limit rods are uniformly formed in the position, close to the outer edge, of the front cover plate body along the circumferential direction, and a plurality of upper bolt mounting holes matched with positioning bolts are formed in the front cover plate body around the water inlet; The rear cover plate comprises a rear cover plate body, wherein a bulge is arranged at the center of the rear cover plate body, a shaft penetrating hole with a key groove is formed in the rear cover plate body and the bulge, a plurality of lower limit arc grooves matched with limit rods are uniformly formed in the position, close to the outer edge, of the rear cover plate body along the circumferential direction, a plurality of locking holes are formed between two adjacent lower limit arc grooves, a plurality of lower bolt mounting holes matched with positioning bolts are formed in the rear cover plate body around the bulge, and an outer anti-drop ring/an inner anti-drop ring are respectively arranged at the periphery/the inner periphery of the lower limit arc grooves at the lower side of the rear cover plate body; the annular rotating plate comprises an annular rotating plate body, a plurality of radial pushing grooves matched with corresponding pushing heads are uniformly formed in the annular rotating plate body along the circumferential direction, a push rod installation groove convenient for embedding and installing a locking push rod is formed between two adjacent radial pushing grooves in the annular rotating plate body, a movable rod of the locking push rod can extend into a locking hole right above the locking push rod, an outer anti-falling rotating groove matched with an outer anti-falling ring and an inner anti-falling rotating groove matched with an inner anti-falling ring are respectively formed in the upper side of the annular rotating plate body at the periphery/inner periphery of the radial pushing grooves, and a stirring tooth groove is formed in the outer edge of the annular rotating plate body.
3. 3. The automatic detection system for the strength of the multistage centrifugal pump impeller according to claim 2, wherein the lifting turnover assembly comprises a groove-shaped base plate, a lifting push rod, a rotary joint, a square column, a horizontal turnover driving motor, a driving bevel gear, a driven bevel gear and a gear box, the lifting push rod is installed on the inner side of an upper side plate of the groove-shaped base plate, the movable end of the lifting push rod is connected with the square column through the rotary joint, the horizontal turnover driving motor is installed on the outer side of a web plate of the groove-shaped base plate, the driving bevel gear is installed at the output end of the horizontal turnover driving motor, the driven bevel gear is sleeved on the outer side of the square column and meshed with the driving bevel gear, the gear box is installed on the outer side of the groove-shaped base plate located on the driving bevel gear and the outer side of the driven bevel gear, and the horizontal plate seat is installed on the lower side of the groove-shaped base plate through a hanging frame.
4. 4. The automatic detection system for the strength of the multistage centrifugal pump impeller according to claim 3, wherein the clamping assembly comprises a mounting column, convex keys, clamping driving motors, driving gears, driven gears and movable toothed plates, the mounting column is fixed at the lower end of the square column, round holes for avoiding the square column are formed in a horizontal plate seat, the convex keys matched with the key grooves are formed in the outer sides of the mounting column, the clamping driving motors are mounted in the inner sides of the mounting column, the driving gears are mounted at the output ends of the clamping driving motors, storage sliding grooves are symmetrically formed in two sides of the driving gears by the mounting column, two movable toothed plates which are distributed in a central symmetry mode are limited in the two storage sliding grooves in a sliding mode, and driven gears for transmission are mounted between the driving gears and the corresponding movable toothed plates.
5. 5. The automatic detection system for strength of impeller of multistage centrifugal pump according to claim 4, wherein the cover plate strength detection assembly comprises a screw motor, a driving screw, a carrier block, an outer frame, a vertical overturning driving motor, a steering mechanism, an inner box, a first steel ball, a weight block, a hammer rod, mechanical clamping jaws and a righting push rod, the output end of the screw motor is provided with the driving screw, the outer side of the driving screw is sleeved with a horizontal movable groove which is arranged in a preset horizontal plate seat in a sliding mode, the side end of the carrier block is provided with the outer frame, the inner box is movably supported in the outer frame, the outer side of the outer frame is provided with the vertical overturning driving motor which drives the inner box to vertically overturn through the steering mechanism and the righting push rod which is used for righting the vertical position of the inner box, the bottom end of the outer frame is clamped with the first steel ball capable of vertically displacing in a small range, the lower side of the weight block is provided with the hammer rod which is used for impacting the first steel ball, and the upper end of the inner box is provided with the mechanical clamping jaws capable of clamping the weight.
6. 6. The automatic detection system for the strength of the impeller of the multistage centrifugal pump according to claim 5, wherein a bottom plate of the inner box is provided with hammer rod perforations which are convenient for a hammer rod to pass through, outer clamping holes are symmetrically formed in two sides of the top of the inner box, side plates of the inner box are provided with righting holes which are convenient for a movable rod in a righting push rod to be clamped in, and two sides of the hammer block are provided with inner clamping holes; the mechanical clamping jaw comprises a mounting box, a horizontal rod is movably supported in the mounting box, a clamping jaw driving motor is fixed on the outer side of an upper plate of the mounting box, the output end of the clamping jaw driving motor is in transmission connection with the horizontal rod through a steering gear group, the horizontal rod is provided with two screw rod sections with opposite rotation directions, each screw rod section is sleeved with a clamping jaw plate penetrating through a lower plate of the mounting box, and the inner side of the outer end part of the clamping jaw plate is provided with a clamping head capable of clamping holes in Kong Karu through outer clamping.
7. 7. The automated multi-stage centrifugal pump impeller strength detection system of claim 6, further comprising a controller connected to the lift flip assembly, the clamp assembly, the cover plate strength detection assembly, and the blade strength detection assembly, respectively.
8. 8. The automatic detection method for the strength of the impeller of the multistage centrifugal pump, which is realized based on the automatic detection system for the strength of the impeller of the multistage centrifugal pump according to claim 7, is characterized by comprising the following steps: s1, adjusting the height of a clamping assembly through a lifting overturning assembly, and locking a combined closed impeller by using the clamping assembly so that a front cover plate faces upwards; s2, detecting the intensity of different positions of the front cover plate by using a cover plate intensity detection assembly, and detecting the intensity of blades in different rotation directions by using a blade intensity detection assembly; S3, the clamping assembly is used for unlocking the combined closed impeller, the combined closed impeller is turned up and down and placed, the height of the clamping assembly is adjusted through the lifting turning assembly, and the clamping assembly is used for locking the combined closed impeller, so that the rear cover plate faces upwards; S4, detecting the strength of different positions of the rear cover plate and the annular rotating plate by using the cover plate strength detection assembly.

Description

Automatic detection system and method for impeller strength of multistage centrifugal pump Technical Field The invention belongs to the technical field of centrifugal pump production, and particularly relates to an automatic detection system and method for the strength of a multistage centrifugal pump impeller. Background The multistage centrifugal pump adopts the closed impeller and has the main advantages of high efficiency and stability. The closed impeller has the advantages that the front cover plate and the rear cover plate of the impeller are completely closed with the blades, so that the secondary flow and leakage loss of fluid in the impeller are obviously reduced, and the hydraulic efficiency of the pump is improved. The design can more accurately control the motion track of the fluid, reduce vortex and energy dissipation, and ensure that the medium is stably conveyed along a designed flow channel. Meanwhile, the structure of the closed impeller enhances the mechanical strength of the impeller, reduces vibration and abrasion caused by high-speed rotation, and prolongs the service life of equipment. In addition, the sealing reduces the contact risk of the medium and external impurities, and is particularly suitable for conveying clean or easily polluted liquid. Because the leakage quantity is extremely small, the closed impeller can maintain higher lift and flow consistency under the multistage high-pressure working condition, and the harsh industrial requirements are met. In general, the closed impeller achieves integrated improvement ‌ of the multistage centrifugal pump in energy efficiency, reliability and working condition adaptability by optimizing energy transmission and reducing internal loss. The main purpose of the closed impeller in the multistage centrifugal pump for detecting the strength of the cover plate and the blades is to ensure the structural safety and reliability of the closed impeller under the working conditions of high-speed rotation and high pressure. Because the impeller is a core component of the pump, the impeller bears the effects of fluid pressure, centrifugal force and alternating load for a long time, and the insufficient strength of the cover plate and the blades can lead to deformation, crack and even fracture, thereby causing vibration, efficiency reduction or catastrophic failure of the pump body. The strength detection verifies whether the cover plate and the blade can meet the design stress requirement by simulating the mechanical environment under the actual working condition, and early failure caused by material defects or structural stress concentration is avoided. The process provides key guarantee for long-term stable operation, prolonged maintenance period and safety compliance of the multistage centrifugal pump. The closed impeller for the multistage centrifugal pump is of an integrated structure, and has the advantages that the rotation direction of the blades cannot be adjusted, the casting difficulty is high, and the preparation cost is high. Intensity detection system for multistage centrifugal pump impeller among the prior art can't satisfy the automatic detection demand of apron and blade in the different downward intensity of revolving in above-mentioned combination formula closed impeller, and complex operation, detection efficiency is lower. Disclosure of Invention The invention aims to overcome at least one of the problems in the prior art and provide an automatic detection system and method for the strength of a multistage centrifugal pump impeller. In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme: The invention provides an automatic detection system for the strength of an impeller of a multistage centrifugal pump, which comprises a lifting turnover assembly, a horizontal plate seat, a clamping assembly, a cover plate strength detection assembly and a blade strength detection assembly, wherein the clamping assembly for clamping and locking a combined closed impeller is arranged below the horizontal plate seat, the lifting turnover assembly for driving the clamping assembly to lift and horizontally turn is arranged on the upper side of the horizontal plate seat, the combined closed impeller is composed of a blade, a front cover plate, a rear cover plate, an annular rotating plate, a positioning bolt and a locking push rod, the cover plate strength detection assembly for detecting the strength of the front cover plate, the rear cover plate or the annular rotating plate is arranged on the horizontal plate seat, and the blade strength detection assembly for detecting the strength of the blades in different directions is arranged on the horizontal plate seat. Further, in the automatic detection system for the strength of the impeller of the multistage centrifugal pump, the blades in the combined closed impeller are provided with a plurality of blades and distributed in a