Adjustable outside diameter impeller alignment gauge

Abstract

The utility model discloses an adjustable outer diameter impeller alignment ruler, including sliding ruler seat (1), the sliding setting of sliding ruler seat (1) has the cylindrical ruler body (4), is provided with the scribe (5) and scribe numerical value (3) on the cylindrical ruler body (4), the cylindrical ruler body (4) still is provided with the positioning ring (6) for the positioning scribe numerical value (3) on, the lower end of cylindrical ruler body (4) is connected with the gyro wheel (10) through the pivot (9). The utility model discloses convenient measurement adjustable impeller outer diameter, need not to disassemble double -suction centrifugal pump, be convenient for accurate alignment impeller radius, reduce water pump maintenance workload.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump calibration and measurement technology, specifically to an adjustable outer diameter impeller calibration ruler. Background Technology

[0002] In the current processing and maintenance of double-suction centrifugal pumps (especially those with adjustable outer diameter impellers), the measurement of the impeller outer diameter mainly relies on vernier calipers and depth gauges. However, these two tools have significant limitations in practical applications. While vernier calipers can measure the inner and outer diameters of parts, measuring the impeller blade radius inside a centrifugal pump is difficult, requiring disassembly of the pump, which increases maintenance workload and prolongs the repair and commissioning cycle. Depth gauges only provide basic depth measurement, lack a fixed structure for the pump, cannot stably position the measurement, and lack sealing capabilities, making them unsuitable for impeller calibration under pressurized conditions.

[0003] For double-suction pumps with adjustable outer diameter impellers, the impeller blades can move and extend. During equipment commissioning and daily maintenance, it is necessary to accurately determine the impeller outer diameter to ensure that the pump is in the best operating condition. However, existing measuring tools have problems such as "requiring equipment disassembly" and "lacking fixed sealing function", which make it difficult to meet the actual needs of this type of double-suction pump for efficient, convenient, and pressurized calibration of the impeller outer diameter. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable outer diameter impeller calibration ruler. This invention facilitates the measurement of the adjustable impeller outer diameter without disassembling the double-suction centrifugal pump, enabling accurate impeller radius calibration and reducing pump maintenance workload.

[0005] The technical solution of this utility model is as follows: an adjustable outer diameter impeller calibration ruler, including a sliding ruler base, a cylindrical ruler body slidably disposed on the sliding ruler base, and scale lines and scale line values ​​disposed on the cylindrical ruler body; a positioning ring for positioning the scale line values ​​is also sleeved on the cylindrical ruler body, and a roller is connected to the lower end of the cylindrical ruler body via a rotating shaft.

[0006] The aforementioned adjustable outer diameter impeller calibration ruler has a threaded outer side on the sliding ruler seat, which is directly screwed into the exhaust port of the double-suction centrifugal pump via the thread.

[0007] The aforementioned adjustable outer diameter impeller calibration ruler has a positioning screw on the sliding ruler base for fixing the position of the cylindrical ruler body.

[0008] The aforementioned adjustable outer diameter impeller calibration ruler has a fastening screw on the positioning ring.

[0009] In the aforementioned adjustable outer diameter impeller calibration ruler, a sealing ring is provided between the sliding ruler base and the cylindrical ruler body.

[0010] The aforementioned adjustable outer diameter impeller calibration ruler has graduations that are evenly spaced along the axial direction of the cylindrical ruler body. The graduation values ​​are marked between the graduations, and the values ​​increase along the cylindrical ruler body towards the roller.

[0011] The aforementioned adjustable outer diameter impeller calibration ruler has a mounting groove at one end of the cylindrical ruler body near the roller, the two ends of the shaft are fixed to the side wall of the mounting groove, and the roller is located in the groove with its outer circumference protruding from the groove opening.

[0012] Compared with existing technologies, this invention allows for direct installation of the calibration ruler using the exhaust port of the double-suction centrifugal pump, enabling the measurement and calibration of impeller blade radii without disassembling the equipment, thus simplifying the operation process. This invention achieves stable fixation of the calibration ruler to the pump through a threaded sliding ruler seat, while a sealing ring seals the fit gap between the sliding ruler seat and the cylindrical ruler body, allowing the calibration ruler to adapt to the impeller outer diameter calibration requirements under pressurized conditions. This invention uses the sliding cylindrical ruler body and matching graduations and graduation values ​​to accurately read the height difference between the impeller blades and the sliding ruler seat. Combined with the measurable distance from the open surface of the double-suction centrifugal pump to the outer side of the sliding ruler seat, the impeller blade radius can be quickly determined, facilitating the correction of blades with radius deviations and ensuring the pump is always in optimal operating condition. This invention reduces the workload of maintenance for double-suction centrifugal pumps, shortens the commissioning and repair cycle, and reduces equipment maintenance costs and improves the commissioning and maintenance efficiency of double-suction pumps with adjustable outer diameter impellers through a convenient, efficient, and disassembly-free measurement and calibration method. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the usage state of this utility model; Figure 3 This is a schematic diagram showing the distance from the open face to the sliding ruler of a double-suction centrifugal pump. Figure Labels 1. Sliding ruler base; 2. Sealing ring; 3. Gradient value; 4. Cylindrical ruler body; 5. Gradient; 6. Positioning ring; 7. Fastening screw; 8. Positioning screw; 9. Shaft; 10. Roller. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0015] Example: An adjustable outer diameter impeller calibration ruler, such as... Figure 1As shown, the system includes a sliding ruler base 1, a sealing ring 2, graduations 3, a cylindrical ruler body 4, graduations 5, a positioning ring 6, fastening screws 7, positioning screws 8, a shaft 9, and rollers 10. The structure and function of each component are as follows: The sliding ruler base 1 has an external thread on its outer circumference, which can be directly and detachably installed on the exhaust port of the double-suction centrifugal pump to fix the calibration ruler to the water pump; the sliding ruler base 1 has a through hole along the axial direction for the cylindrical ruler body 4 to slide through; the side wall has a threaded hole communicating with the through hole for installing the positioning screw 8.

[0016] The sealing ring 2 is embedded between the inner wall of the through hole of the sliding ruler seat 1 and the outer circumferential surface of the cylindrical ruler body 4, sealing the gap between the two and ensuring that the calibration ruler can be used on a pressurized water pump.

[0017] A cylindrical ruler 4 slides through a through hole in a sliding ruler base 1 to measure the height difference between the impeller blades and the sliding ruler base 1. Its outer circumference is provided with axially extending graduations 5 and corresponding graduation values ​​3 for reading the measured height difference. The graduations 5 are evenly spaced along the axial direction of the cylindrical ruler 4. A mounting groove is provided at the bottom end of the cylindrical ruler 4. The two ends of a shaft 9 are fixed to the sidewalls of the mounting groove. A roller 10 is rotatably sleeved on the outer circumference of the shaft 9 to contact the impeller blades and rotates synchronously with the impeller, reducing friction between the blades and the cylindrical ruler 4.

[0018] A positioning ring 6 is fitted onto the cylindrical ruler 4 to position the graduated value 3. The side wall of the positioning ring 6 has a threaded hole, and the fastening screw 7 engages with the threaded hole. After tightening, the end of the screw can press against the cylindrical ruler 4 to fix the position of the positioning ring 6 and achieve the positioning of the graduated value 3.

[0019] The positioning screw 8 engages with the threaded hole on the side wall of the sliding ruler 1. When tightened, the end of the screw abuts against the cylindrical ruler 4, fixing the axial position of the cylindrical ruler 4 relative to the sliding ruler 1.

[0020] During component assembly, the sealing ring 2 is fitted into the gap in the inner wall of the through hole of the sliding ruler seat 1, ensuring that the inner ring surface of the sealing ring 2 is tightly fitted with the outer circumferential surface of the cylindrical ruler body 4 to be installed later; the positioning screw 8 is screwed into the threaded hole on the side wall of the sliding ruler seat 1, and in the initial state, the end of the positioning screw 8 is not pressed against the inner wall of the through hole, leaving room for the installation of the cylindrical ruler body 4; the cylindrical ruler body 4 is slid into the through hole of the sliding ruler seat 1 until the end of the cylindrical ruler body 4 with the shaft 9 faces the inside of the water pump; the positioning ring 6 is movably sleeved on the end of the cylindrical ruler body 4 away from the roller 10, and the fastening screw 7 is screwed into the threaded hole on the side wall of the positioning ring 6, and in the initial state, it is not pressed against the cylindrical ruler body 4; confirm that the roller 10 has rotated and is sleeved on the outer circumference of the shaft 9, and that the outer circumferential surface of the roller 10 can rotate freely.

[0021] Actual measurement operation 1. Fixing the calibration ruler: Hold the sliding ruler base 1 and align the end with the external thread with the exhaust port of the double-suction centrifugal pump. Rotate the sliding ruler base 1 clockwise until the thread is fully engaged to fix the calibration ruler to the water pump. At this time, the sealing ring 2 has sealed the gap between the sliding ruler base 1 and the cylindrical ruler body 4, which can be adapted to pressurized working conditions.

[0022] 2. Read the blade scale: Loosen the positioning screw 8, and slowly push the cylindrical scale 4 into the water pump until the roller 10 approaches the impeller blade (e.g., Figure 2 (As shown); rotate the double-suction centrifugal pump rotor clockwise. When the blades contact the roller 10 and push it to rotate, the cylindrical scale body 4 will rise to the highest point with the push of the blades. At this time, tighten the positioning screw 8 to fix the position of the cylindrical scale body 4, read and record the scale value 3; loosen the positioning screw 8, pull the cylindrical scale body 4 out slightly, rotate the rotor 60°, repeat the above steps, and record the scale value 3 of all impeller blades in sequence.

[0023] 3. Calculation and Verification: Measure the distance from the open face of the double-suction centrifugal pump to the outer end face of the sliding ruler seat 1 using a ruler (e.g., Figure 3 The distance D shown is subtracted from the etched value 3 corresponding to each blade to obtain the actual radius of each blade. By comparing the radii of each blade, blades with deviations exceeding the allowable range are adjusted and corrected until all blade radii are consistent, ensuring the optimal operating condition of the water pump.

[0024] In summary, this utility model can be used on pressurized water pumps without disassembling the pump equipment, which can reduce the workload of water pump maintenance, ensure that the water pump is in the best operating condition, and improve the debugging and maintenance efficiency of double-suction pumps.

Claims

1. An adjustable outer diameter impeller calibration ruler, characterized in that: It includes a sliding ruler base (1), on which a cylindrical ruler body (4) is slidably disposed, and on which the cylindrical ruler body (4) is provided a scale line (5) and a scale line value (3); the cylindrical ruler body (4) is also fitted with a positioning ring (6) for positioning the scale line value (3), and the lower end of the cylindrical ruler body (4) is connected to a roller (10) via a rotating shaft (9).

2. The adjustable outer diameter impeller calibration ruler according to claim 1, characterized in that: The outer side of the sliding ruler (1) is provided with threads, and the sliding ruler (1) is directly screwed into the exhaust hole of the double-suction centrifugal pump through the threads.

3. The adjustable outer diameter impeller calibration ruler according to claim 1, characterized in that: The sliding ruler base (1) is provided with a positioning screw (8) for fixing the position of the cylindrical ruler body (4).

4. The adjustable outer diameter impeller calibration ruler according to claim 1, characterized in that: The positioning ring (6) is provided with fastening screws (7).

5. The adjustable outer diameter impeller calibration ruler according to claim 1, characterized in that: A sealing ring (2) is provided between the sliding ruler base (1) and the cylindrical ruler body (4).

6. The adjustable outer diameter impeller calibration ruler according to claim 3, characterized in that: The sliding ruler base (1) has a through hole along the axial direction for the cylindrical ruler body (4) to slide through; the side wall has a threaded hole that communicates with the through hole for installing positioning screws (8).

7. The adjustable outer diameter impeller calibration ruler according to claim 1, characterized in that: The bottom end of the cylindrical ruler (4) is provided with an installation groove, the two ends of the shaft (9) are fixed to the side wall of the installation groove, and the roller (10) is located in the groove and its outer circumference protrudes from the groove opening.

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