A method of installing a slurry pump

Abstract

The present application belongs to the field of centrifugal pump, and particularly relates to a mounting method of a slurry pump, which comprises seven steps, i.e. firstly fixing a bearing body assembly to a bracket body and installing an adjusting screw, then fixing a pump body to the bracket body, then measuring the round run-out of an inner hole and an end face of the pump body and requiring to meet the requirements, then opening two positioning pin holes at a connecting part, then installing a sealing assembly, a secondary impeller and a rear backplate, then installing a primary impeller, then installing a sheath and a front backplate, then installing an inlet cone pipe outside a pump cover and connecting and fixing by fastening bolts, and finally adjusting the gap between the primary impeller and the front backplate, fastening the sealing assembly, fastening the primary impeller, and performing disc checking without friction; the present application correctly installs the slurry pump, improves the qualified rate of one-time trial, and thus improves the service life of the pump.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pumps, and more specifically to an installation method for a slurry pump. Background Technology

[0002] A slurry pump is a machine that increases the energy of a solid-liquid mixture by using centrifugal force (the rotation of the pump impeller), converting electrical energy into the kinetic and potential energy of the medium. It is mainly used in industries such as mining, power plants, dredging, metallurgy, chemicals, building materials, and petroleum. Slurry pumps are not a single piece; they require assembly of multiple parts. These parts need to fit precisely. If the initial installation fails during trial operation, reinstallation is necessary. Reinstallation affects the precision of the fit between components, impacting the pump's performance and lifespan. Problems during installation can lead to issues such as overheating of bearings or seals, leaks, abnormal noises, and vibrations during operation.

[0003] There are better solutions for existing installation methods, therefore, an installation method for slurry pumps is proposed. Summary of the Invention

[0004] This invention addresses the problems mentioned above by proposing a method for installing a slurry pump that ensures the pump meets technical standards after installation, improves the success rate of initial commissioning, and enhances the pump's performance and lifespan.

[0005] To achieve the above objectives, the present invention provides an installation method for a slurry pump, comprising the following steps:

[0006] Step 1: Place the bearing body assembly on the bracket body and insert the adjusting screw. Place the bearing body pressure plate on the bracket body and tighten the bearing body assembly to the bracket body with bolts and nuts. The left end of the bearing body assembly is the coupling end and the right end is the impeller end.

[0007] Step 2: Install lifting eye bolts on the pump body, lift the pump body with a crane, and then attach and fix the pump body to the stop on the bracket body;

[0008] Step 3: Use a roundness tester to measure the circular runout of the inner bore of the pump body, ensuring that the circular runout here is less than 0.2mm. Measure the circular runout of the pump body end face, ensuring that the circular runout here is less than 0.15mm. After the measurement is completed, loosen the nut on the bearing body pressure plate, remove the bearing body assembly, send the pump body and bracket body to the drilling machine, drill two locating pin holes at the connection position, and hammer in the locating pins.

[0009] Step 4: Place the bearing body assembly on the bracket body and fix it with the bearing body pressure plate; push the sealing assembly into the pump body hole through the impeller end; thread the auxiliary impeller onto the impeller end; install the rear guard plate into the stop of the pump body and fix it in place.

[0010] Step 5: Loop a soft rope around the outer circumference of the main impeller, lift the main impeller with a crane, and gently place it against the end of the impeller by hand. Rotate the bearing assembly to screw the main impeller into and install it on the bearing assembly.

[0011] Step 6: Install lifting rings on the sheath, use a crane to lift the sheath to the rear guard plate, then fit the sheath onto the right side of the rear guard plate and fix it between the rear guard plate and the pump body. Fix the inlet cone tube to the outside of the pump cover, position the front guard plate and the pump cover to the sheath, and then connect and fix them with fastening bolts.

[0012] Step 7: Loosen the bolts at the bearing housing pressure plate, adjust the adjusting screw to make the main impeller contact the front guard plate, then adjust the bearing housing assembly away from the front guard plate so that the gap between the main impeller and the front guard plate is 0.5~1mm, tighten the nut on the adjusting screw, tighten the bolts on the bearing housing pressure plate, tighten the fastening bolts and positioning screws on the sealing assembly, and lock the main impeller by tightening the bolts on the disassembly ring.

[0013] Furthermore, before proceeding to step one, it is necessary to clean each component, remove burrs from each component, and use sandpaper and a fine file to trim the positioning semicircles and positioning stops on the bracket body.

[0014] Furthermore, in step three, after installing the positioning pin, the positioning pin needs to be 1-2mm lower than the end face of the pump body. Then, the circular runout of the inner hole and end face of the pump body needs to be measured again. The measured data still needs to be within the required range before the next installation step can be carried out.

[0015] Furthermore, in step four, an O-ring is provided on the end face of the sealing bushing of the sealing assembly, and O-rings are installed in the grooves of the auxiliary impeller and the pressure reducing cover. An O-ring is also provided on the outer circular platform of the rear guard plate.

[0016] Furthermore, in step five, when lifting the main impeller, it is necessary to ensure that the axis of the main impeller is horizontal, and it is strictly forbidden for the main impeller to hit the shaft end; when pre-tightening the main impeller, a long sleeve is used to cover the pump installation wrench, and the main impeller is pre-tightened slowly with force.

[0017] Furthermore, in step seven, when adjusting the clearance of the main impeller, it is necessary to determine whether the main impeller can rub against the fixing part, and the rotation should not be too fast.

[0018] Furthermore, before installation, grease is applied to the mating parts of the pressure reducing cover, front guard plate, and rear guard plate with the pump body, pump cover, and sheath, and grease is also applied to the threaded holes of the main impeller.

[0019] Furthermore, in step seven, after the main impeller is tightened, a turning test should be performed to ensure there is no friction noise.

[0020] Furthermore, in step three, the two positioning pin holes are offset downward by 15° from the horizontal center line of the stop of the bracket body and are symmetrical from left to right, and are on the same circumference as the screw connection port at the stop.

[0021] In summary, the installation method of the slurry pump of the present invention has the following advantages and beneficial technical effects:

[0022] The installation method of the slurry pump of the present invention can improve the commissioning pass rate after the pump is installed;

[0023] The installation method of the slurry pump of the present invention can prevent problems such as excessive temperature of bearings or sealing components, water leakage, abnormal noise, and vibration after the pump is installed.

[0024] The installation method of the slurry pump of the present invention improves the success rate of pump installation on the first attempt and reduces the impact of secondary installation on pump quality. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the pump body after assembly, illustrating the installation method of a slurry pump according to the present invention.

[0027] Figure 2 This is a top view of the bearing assembly mounting bearing pressure plate of a slurry pump installation method according to the present invention.

[0028] The reference numerals in the attached figures are:

[0029] 1-Bearing body assembly; 2-Bracket body; 21-Bearing body pressure plate; 22-Bolt; 3-Adjusting bolt; 4-Pump body; 5-Sealing assembly; 6-Pressure reducing cover; 7-Auxiliary impeller; 8-Main impeller; 9-Rear guard plate; 10-Front guard plate; 11-Sheath; 12-Pump cover; 13-Inlet tapered tube; 14-Coupling end; 15-Impeller end; 16-Disassembly ring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings:

[0031] like Figure 1 and Figure 2 As shown, an installation method for a slurry pump includes the following steps:

[0032] Step 1: Place the bearing body assembly 1 on the bracket body 2 and insert the adjusting screw 3. Place the bearing body pressure plate 21 on the bracket body 2. Use bolts and nuts to tighten the bearing body assembly 1 and the bracket body 2. The left end of the bearing body assembly 1 is the coupling end 14, and the right end is the impeller end 15.

[0033] Step 2: Install lifting eye bolts on pump body 4, lift pump body 4 with a crane, and then attach and fix pump body 4 to the stop on bracket body 2.

[0034] Step 3: Use a roundness tester to measure the circular runout of the inner hole of the pump body 4, ensuring that the circular runout here is less than 0.2mm. Measure the circular runout of the pump body end face, ensuring that the circular runout here is less than 0.15mm. After the measurement is completed, loosen the nut on the bearing body pressure plate 21, remove the bearing body assembly 1, send the pump body 4 and bracket body 2 to the drilling machine, drill two positioning pin holes at the connection position, and hammer in the positioning pins.

[0035] Step 4: Place the bearing body assembly 1 on the bracket body 2 and fix it with the bearing body pressure plate 21. Push the sealing assembly 5 into the hole of the pump body 4 through the impeller end 15. Thread the auxiliary impeller 7 onto the impeller end 15. Install the rear guard plate 9 into the stop of the pump body 4 and fix it in place.

[0036] Step 5: Use a soft rope to loop around the outer circle of the main impeller 8, use a crane to lift the main impeller 8, and gently place the main impeller 8 against the end of the impeller end 15 by hand. Rotate the bearing body assembly 1 to screw the main impeller 8 into and install it on the bearing body assembly 1.

[0037] Step 6: Install lifting rings on the protective sleeve 11, use a crane to lift the protective sleeve 11 to the rear guard plate 9, then fit the protective sleeve 11 onto the right side of the rear guard plate 9 and fix it between the rear guard plate 9 and the pump body 4, fix the inlet cone tube 13 to the outside of the pump cover 12, position the front guard plate 10 and the pump cover 12 with the protective sleeve 11, and then connect and fix them with fastening bolts;

[0038] Step 7: Loosen the bolts at the bearing housing pressure plate 21, adjust the adjusting screw 3 to make the main impeller 8 contact the front guard plate 10, then adjust the bearing housing assembly 1 away from the front guard plate 10 so that the gap between the main impeller 8 and the front guard plate 10 is 0.5~1mm, tighten the nut on the adjusting screw 3, tighten the bolts on the bearing housing pressure plate 21, tighten the fastening bolts and positioning screws on the sealing assembly 5, and lock the main impeller 8 by tightening the bolts on the disassembly ring 16.

[0039] Preferably, before proceeding to step one, each component needs to be cleaned, burrs removed, and the positioning semicircles and positioning stops on the bracket body 2 should be repaired with sandpaper and fine files.

[0040] Preferably, in step three, after the positioning pin is installed, the positioning pin needs to be 1-2mm lower than the end face of the pump body 4. Then, the runout of the inner hole and end face of the pump body 4 needs to be measured again. The measured data still needs to be within the required range before the next installation step can be carried out.

[0041] Preferably, in step four, an O-ring is provided on the end face of the sealing bushing of the sealing assembly 5, and O-rings are installed in the grooves of the pressure reducing cover 6 and the auxiliary impeller 7. An O-ring is also provided on the outer circular platform of the rear guard plate 9.

[0042] Preferably, in step five, when lifting the main impeller 8, it is necessary to ensure that the axis of the main impeller 8 is horizontal and strictly prohibit the main impeller 8 from hitting the shaft end; when pre-tightening the main impeller 8, a long sleeve is used to cover the pump installation wrench, and the main impeller 8 is pre-tightened slowly with force.

[0043] Preferably, in step seven, when adjusting the clearance of the main impeller 8, it is necessary to determine whether the main impeller 8 can rub against the fixing part, and the rotation should not be too fast.

[0044] Preferably, grease is applied to the mating points of the pressure reducing cover 6, the front guard plate 10, and the rear guard plate 9 with the pump body 4, the pump cover 12, and the sleeve 11 before installation, and grease is also applied to the threaded holes of the main impeller 8.

[0045] Preferably, in step seven, after the main impeller 8 is tightened, a turning test should be performed to ensure there is no friction noise.

[0046] Preferably, in step three, the two positioning pin holes are offset downward by 15° from the horizontal center line of the stop of the bracket body 2 and are symmetrical from left to right.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for installing a slurry pump, characterized in that, Includes the following steps: Step 1: Place the bearing body assembly (1) on the bracket body (2) and insert the adjusting screw (3). Place the bearing body pressure plate (21) on the bracket body (2). Use bolts and nuts to tighten the bearing body assembly (1) and the bracket body (2). The left end of the bearing body assembly (1) is the coupling end (14), and the right end is the impeller end (15). Step 2: Install lifting eye bolts on the pump body (4), lift the pump body (4) with a crane, and then attach and fix the pump body (4) to the stop on the bracket body (2); Step 3: Use a roundness tester to measure the circular runout of the inner hole of the pump body (4) to ensure that the circular runout here is less than 0.2mm. Measure the circular runout of the pump body end face to ensure that the circular runout here is less than 0.15mm. After the measurement is completed, loosen the nut on the bearing body pressure plate (21), remove the bearing body assembly (1), send the pump body (4) and bracket body (2) to the drilling machine, drill two positioning pin holes at the connection position, and hammer in the positioning pins; Step 4: Place the bearing body assembly (1) on the bracket body (2) and fix it with the bearing body pressure plate (21), push the sealing assembly (5) into the hole of the pump body (4) through the impeller end (15), string the auxiliary impeller (7) onto the impeller end (15), and install the rear guard plate (9) into the stop of the pump body (4) and fix it. Step 5: Use a soft rope to loop around the outer circle of the main impeller (8), use a crane to lift the main impeller (8), hold the main impeller (8) by hand and gently place it against the end of the impeller end (15), rotate the bearing body assembly (1), and screw the main impeller (8) into and install it on the bearing body assembly (1); Step 6: Install lifting rings on the sheath (11), use a crane to lift the sheath (11) to the rear guard plate (9), then fit the sheath (11) onto the right side of the rear guard plate (9) and fix it between the rear guard plate (9) and the pump body (4), install the front guard plate (10) into the stop of the pump cover (12) and fix it, fix the inlet cone tube (13) to the outside of the pump cover (12), position the front guard plate (10) and the pump cover (12) with the sheath (11), and then connect and fix them with fastening bolts; Step 7: Loosen the bolts at the bearing body pressure plate (21), adjust the adjusting screw (3) to make the main impeller (8) contact the front guard plate (10), then adjust the bearing body assembly (1) away from the front guard plate (10) so that the gap between the main impeller (8) and the front guard plate (10) is 0.5~1mm, tighten the nut on the adjusting screw (3), tighten the bolts on the bearing body pressure plate (21), tighten the fastening bolts and positioning screws on the sealing assembly (5), and lock the main impeller (8) by tightening the bolts on the disassembly ring (16).

2. The installation method of a slurry pump according to claim 1, characterized in that: Before proceeding to step one, each component needs to be cleaned, burrs removed, and the positioning semicircles and positioning stops on the bracket body (2) repaired with sandpaper and fine files.

3. The installation method of a slurry pump according to claim 1, characterized in that: In step three, after the positioning pin is installed, the positioning pin needs to be 1-2 mm lower than the end face of the pump body (4). Then, the circular runout of the inner hole and end face of the pump body (4) needs to be measured again. The measured data still needs to be within the required range before the next step of installation can be carried out.

4. The installation method of a slurry pump according to claim 1, characterized in that: In step four, an O-ring is provided on the end face of the sealing bushing of the sealing assembly (5), and O-rings are installed in the grooves of the pressure reducing cover (6) and the auxiliary impeller (7). An O-ring is also provided on the outer circular platform of the rear guard plate (9).

5. The installation method of a slurry pump according to claim 1, characterized in that: In step five, when the main impeller (8) is lifted, the axis of the main impeller (8) must be kept horizontal, and the main impeller (8) must not be bumped against the shaft end. When pre-tightening the main impeller (8), a long sleeve is put on the pump installation wrench, and the main impeller (8) is pre-tightened slowly.

6. The installation method of a slurry pump according to claim 1, characterized in that: In step seven, when adjusting the clearance of the main impeller (8), it is necessary to ensure that the main impeller (8) does not rub against the fixing part and does not rotate too fast.

7. The installation method of a slurry pump according to claim 4, characterized in that: Before installation, apply grease to the mating points of the pressure reducing cover (6), front guard plate (10) and rear guard plate (9) with the pump body (4), pump cover (12) and sleeve (11), and also apply grease to the threaded holes of the main impeller (8).

8. The installation method of a slurry pump according to claim 1, characterized in that: In step seven, after the main impeller (8) is tightened, a turning test is performed to ensure there is no friction noise.

9. The installation method of a slurry pump according to claim 1, characterized in that: In step three, the two positioning pin holes are located 15° downward from the horizontal center line of the stop of the bracket body (2) and are symmetrical on the left and right.

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