Electric centrifugal pump motor brush running-in tool

Abstract

The utility model belongs to the technical field of motor carbon brush running-in, and particularly relates to an electric centrifugal pump motor brush running-in tool which comprises a process shell, a first hole, a second hole and a third hole are sequentially formed in the process shell, and the inner diameters of the first hole, the second hole and the third hole are sequentially decreased. A second hole is formed in the process shell, a first bearing is arranged in the second hole, a mounting part is arranged on the process shell located at one end of the first hole, the process shell is detachably connected with the motor through the mounting part, and an output shaft in the motor penetrates through the first hole and is arranged on the inner wall of the first bearing. According to the electric brush running-in tool, according to the working environment and the characteristics of a motor, the process shell is designed to replace an electric centrifugal pump, the supporting part of an armature output shaft is changed, the fuel oil lubrication environment is needed for supporting an original carbon brush running-in armature output shaft graphite bearing, and the ball bearing supporting is directly changed into the air environment; and the grinding test environment is simple and safe.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor carbon brush running-in, in particular to a motor brush running-in tool for an electric centrifugal pump. Background Art

[0002] The motor type inside a certain type of electric centrifugal pump is a brushed DC excitation motor. As a type of DC motor, the operating performance of the brushed DC excitation motor is directly related to the operating safety of electronic equipment. DC can be divided into brushed motors and brushless motors.

[0003] The motor type inside the electric centrifugal pump is a brush-excited DC motor. This type of motor has the characteristics of high temperature and high speed in daily use environment. It is easy to cause carbon powder accumulation, armature and other faults after working for a period of time. Therefore, the contact area of ​​the carbon brush is the top priority in daily maintenance and repair, and it is often necessary to go through the processes of rough grinding and fine grinding of the carbon brush for repair. Among them, rough grinding manually contacts the sandpaper and the commutator, installs the carbon brush, and manually rotates the armature. The contact area of ​​the carbon brush can generally only reach the basic running-in state, and the running-in area is not more than 40%. Fine grinding is the most important process, which is to increase the contact area of ​​the brush after rough grinding from the contact area after rough grinding to 75% and above to meet the technical requirements.

[0004] According to the existing process, fine grinding requires three steps to coordinate as a whole; first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench, and the overall running-in test. The fine grinding time specified by the process is implemented. The output shaft of the armature must be supported by a graphite bearing, and the graphite bearing is equipped with a sealing cup inside to seal the oil. Therefore, the graphite bearing grinding test environment must be lubricated with kerosene as the working medium, resulting in the following difficulties:

[0005] 1. Low efficiency: The carbon brush running-in of this type of motor usually requires three steps of overall coordination; first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for an overall running-in test. The fine grinding and running-in specified by the existing process requires the contact area to reach 75% or more. The fine grinding takes a long time and the whole piece needs to be assembled. After assembly, it needs to be assembled on the test bench for a long time of carbon brush fine grinding. Assembly and running-in take up a lot of time, resulting in low production efficiency.

[0006] 2. Unable to monitor spark level: The spark level of the carbon brush and commutator needs to be monitored during the running-in process of this product. The running-in work of the carbon brush specified in the original process requires three steps: first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for an overall running-in test. Since the entire product is installed in the test bench as an embedded device, and there is fuel as the working medium inside, and only the outer wall of the pump body can be observed from the outside, the spark level of each fine grinding of the carbon brush cannot be directly observed, and thus the spark level technical parameters cannot be achieved.

[0007] 3. Difficulty in assessing the contact area of ​​the carbon brush: The running-in of the carbon brush of this type of motor usually requires three steps as a whole: first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for an overall running-in test. The contact area of ​​the carbon brush often does not meet the standard during the first assembly test and disassembly inspection. Therefore, it is necessary to repeat the assembly and run-in of the carbon brush. Finally, the product needs to be disassembled and assembled many times before the carbon brush contact area that meets the process requirements is achieved. Each disassembly, assembly, and testing process takes one day, so this work is extremely inconvenient.

[0008] 4. Very easy to cause secondary failure: The carbon brush running-in of the type of motor mentioned above usually requires three steps of overall coordination; first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for overall running-in test. Due to multiple disassembly, the necessary replacement parts and components may be damaged due to multiple disassembly, causing failures; because the carbon brush running-in takes a long time, the sealing leather cup installed inside the graphite bearing may cause oil to enter the motor due to multiple disassembly and assembly, further causing the failure of this carbon brush fine grinding task.

[0009] 5. Safety hazards: The carbon brush running-in of the type of motor mentioned above usually requires three steps of overall coordination: first, the overall assembly of the motor, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for an overall running-in test. If the carbon brush contact area and spark level indicators do not meet the standards, secondary decomposition or multiple decompositions are required. Because the fuel of its working medium is kerosene, it is very easy to penetrate. If kerosene leaks into the motor due to repeated assembly, the motor is working with electricity, the spark is too large, and there is a risk of causing kerosene combustion, which poses certain safety hazards. Utility Model Content

[0010] In view of the technical problems existing in the background technology, the utility model provides a brush running-in tool for an electric centrifugal pump motor.

[0011] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0012] A tooling for running-in of brushes of an electric centrifugal pump motor comprises a process shell, wherein hole one, hole two and hole three are sequentially arranged inside the process shell, and the inner diameters of hole one, hole two and hole three decrease in sequence; a first bearing is arranged in hole two, and a mounting portion is arranged on the process shell at one end of hole one, and the process shell is detachably connected to the motor through the mounting portion, and the output shaft inside the motor passes through hole one and is arranged on the inner wall of the first bearing.

[0013] Optionally, one end of the process shell is provided with a plurality of lubrication holes connected with the second hole.

[0014] Optionally, an annular mounting groove is provided on the mounting portion, and the two sides of the mounting groove are respectively provided with a first limiting ring and a second limiting ring. A connecting portion is provided at one end of the motor, and an annular protrusion cooperating with the mounting groove is provided on the connecting portion.

[0015] Optionally, the mounting portion has a plurality of connection holes 1 evenly distributed on its circumference, a portion of the connection holes being connected to the mounting groove, and a portion thereof penetrating through a second limiting ring; the connecting portion has a plurality of connection holes 2 evenly distributed on its circumference, the connection holes 2 and the connection holes 1 being arranged opposite to each other, and a portion of the connection holes 2 penetrating through an annular protrusion.

[0016] Optionally, the electric centrifugal pump motor brush running-in tooling also includes a base, a motor fixing seat is provided on the base, a motor is detachably connected to the motor fixing seat, a slider is slidably provided on the base, a positioning seat is provided on the upper end of the slider, and a process shell is rotatably provided on the inner wall of the positioning seat; the positioning seat and the output shaft of the motor are coaxially arranged.

[0017] Optionally, a guide groove is provided on the base, the sliding block is slidably arranged in the guide groove, and a limit block is detachably arranged at one end of the guide groove.

[0018] Optionally, a second bearing is disposed on the inner wall of the positioning seat, and the outer wall of the process housing is disposed in close contact with the inner wall of the second bearing.

[0019] Optionally, a fixing part is provided at the bottom end of the motor, and a slot cooperating with the fixing part is provided at the upper end of the motor fixing seat, and the fixing part is tightly arranged in the slot. A clamping cylinder is provided on both sides of the motor fixing seat, and a rotating head is rotatably connected to the piston rod of the clamping cylinder. A pressure block is connected to the rotating head, and the pressure block is used to clamp the upper end surface of the fixing part.

[0020] Optionally, a through limiting groove is arranged on the motor fixing seat outside the clamping groove, and the piston rod is slidably arranged close to the limiting groove.

[0021] The utility model has the following advantages and beneficial effects:

[0022] 1. The brush running-in tooling of the utility model is designed according to the working environment and characteristics of the motor, and the process housing is used to replace the electric centrifugal pump itself, changing the support position of the armature output shaft. The original carbon brush running-in armature output shaft graphite bearing support requires a fuel lubrication environment, while this application adopts a ball bearing support, which is directly changed to an air environment, and the grinding test environment is simple and safe.

[0023] Second, the process housing is directly and detachably connected to the motor and can be powered directly from the outside, thus simplifying the test steps: the motor to be run-in is installed into the process housing, the wires are led out, and the DC power supply is turned on to make the motor work. There is no need to occupy a test bench or to assemble the electric centrifugal pump and the motor according to the original testing process. The carbon brush running-in test can be carried out simply, efficiently, with high quality and safely, and the original process defects can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of a process housing provided by the utility model;

[0025] Figure 2 for Figure 1 Left view of

[0026] Figure 3 A cross-sectional view of the process housing and bearing after assembly provided by the utility model;

[0027] Figure 4 The assembly structure diagram of the process housing and the motor provided by the utility model;

[0028] Figure 5 A structural diagram of the process housing and the motor provided by the utility model installed on the base;

[0029] Figure 6 A cross-sectional view of the connection between the motor and the motor fixing seat provided by the utility model;

[0030] Icons: 1-process housing, 11-hole one, 12-hole two, 13-hole three, 14-lubrication hole, 15-installing part, 16-connecting hole one, 17-second limiting ring, 18-first limiting ring, 19-installing groove, 2-first bearing, 3-motor, 31-connecting part, 32-connecting hole two, 33-fixing part, 34-annular protrusion, 4-output shaft, 5-slider, 51-positioning seat, 52-second bearing, 6-base, 61-guide groove, 62-limiting block, 7-motor fixing seat, 71-slot, 72-limiting groove, 73-installing block, 8-clamping cylinder, 81-piston rod, 82-rotating head, 83-pressing block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example

[0034] like Figures 1 to 4 As shown, an electric centrifugal pump motor brush running-in tooling includes a process housing 1, wherein a hole 11, a hole 2 12 and a hole 3 13 are sequentially provided inside the process housing 1, the hole 11, the hole 2 12 and the hole 3 13 are coaxially arranged, and the inner diameters of the hole 11, the hole 2 12 and the hole 3 13 decrease sequentially; a first bearing 2 is arranged in the hole 2 12, and an annular mounting portion 15 is arranged on the process housing 1 at one end of the hole 11, and the process housing 1 is detachably connected to the motor 3 through the mounting portion 15, and the output shaft 4 inside the motor 3 passes through the hole 11 and is arranged on the inner wall of the first bearing 2.

[0035] like Figure 1 , Figure 3 As shown, further, one end of the process housing 1 is provided with a plurality of lubrication holes 14 connected to the second hole 12 for lubricating the first bearing 2 .

[0036] like Figures 1 to 4 As shown, an annular mounting groove 19 is provided on the mounting portion 15, and the first limiting ring 18 and the second limiting ring 17 are respectively disposed on both sides of the mounting groove 19. A connecting portion 31 is provided at one end of the motor 3, and an annular protrusion 34 matching the mounting groove 19 is provided on the connecting portion 31. The motor 3 and the process housing 1 are positioned and installed through the annular protrusion 34 and the mounting groove 19.

[0037] like Figures 1 to 4As shown, further, the circumference of the mounting portion 15 is evenly distributed with a plurality of connection holes 16, part of which is connected to the mounting groove 19, and part of which is set through the second limiting ring 17; the circumference of the connecting portion 31 is evenly distributed with a plurality of connection holes 2 32, which are set opposite to the connection hole 16, and part of which is set through the annular protrusion 34, and the motor 3 and the process housing 1 are quickly installed through the connection holes 16 and the connection holes 2 32. At the same time, the position setting of the above connection holes 16 and the connection holes 2 32 can further optimize the overall structural design, and the arrangement of the connection holes is more compact.

[0038] like Figure 5 , 6 As shown, the electric centrifugal pump motor brush running-in tool of the utility model also includes a base 6, a motor fixing seat 7 is arranged on the base 6, a motor 3 is detachably connected to the motor fixing seat 7, a slider 5 is slidably arranged on the base 6, a positioning seat 51 is arranged on the upper end of the slider 5, and a process housing 1 is rotatably arranged on the inner wall of the positioning seat 51; the positioning seat 51 and the output shaft 4 of the motor 3 are arranged coaxially. Such a design can quickly adjust the relative position and installation angle of the motor 3 and the process housing 1. After the motor 3 is fixed on the motor fixing seat 7, the slider 5 can be slid to make the process housing 1 close to the motor 3, and the process housing 1 can be rotated at the same time so that the connection hole 16 and the connection hole 2 32 are directly opposite, and finally the motor 3 and the process housing 1 are fixedly installed.

[0039] Specifically, a guide groove 61 is provided on the base 6 , and the slider 5 is slidably disposed in the guide groove 61 . A limit block 62 is detachably provided at one end of the guide groove 61 to prevent the slider 5 from escaping from the guide groove 61 .

[0040] Furthermore, a second bearing 52 is disposed on the inner wall of the positioning seat 51 , and the outer wall of the process housing 1 is disposed in close contact with the inner wall of the second bearing 52 , so that the angle of the process housing 1 can be rotated to adjust.

[0041] Furthermore, the bottom end of the motor 3 is provided with a fixing part 33, and the upper end of the motor fixing seat 7 is provided with a slot 71 that matches the fixing part 33, and the fixing part 33 is tightly arranged in the slot 71. The two sides of the motor fixing seat 7 are respectively provided with mounting blocks 73, and a clamping cylinder 8 is fixed on the mounting blocks 73. A through-limiting groove 72 is provided on the motor fixing seat 7 outside the slot 71, and the piston rod 81 of the clamping cylinder 8 is slidably arranged close to the limit groove 72. A rotating head 82 is rotatably connected to the piston rod 81, and a pressing block 83 is connected to the rotating head 82. The pressing block 83 is used to clamp the upper end surface of the fixing part 33. When installing the motor 3, the rotating head 82 is first rotated to rotate the pressing block 83 to the outside of the motor fixing seat 7. After the fixing part 33 is installed in the slot 71, the rotating head 82 is rotated to rotate the pressing block 83 to the upper side of the fixing part 33, and then the clamping cylinder 8 is contracted to clamp the fixing part 33, so as to achieve the installation and fixation of the motor 3. This method eliminates the bolt fixing method and can quickly fix the motor 3, thereby improving the efficiency of the motor carbon brush running-in.

[0042] According to the working environment and characteristics of the motor 3, the utility model designs a process housing 1 to replace the electric centrifugal pump itself, and the support position of the armature output shaft 4 is changed. The original carbon brush running-in armature output shaft 4 uses a graphite bearing support, which requires a fuel lubrication environment, while the present application uses a ball bearing (first bearing 2) support, which is directly changed to an air environment, and the running-in environment is simple and safe.

[0043] This patent combines the test conditions and directly energizes the external power to simplify the test steps: the motor 3 to be run-in is installed in the process housing 1, the wires are led out, and the DC power supply is powered on to realize the operation of the motor 3. The carbon brush running-in test can be carried out simply, efficiently, with high quality and safely, and the original process defects are solved. It has the following characteristics:

[0044] 1. Simple and efficient operation: The original process requires that the carbon brush running-in of this type of motor 3 usually requires three steps of overall coordination: first, the overall assembly of the motor 3, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench for an overall running-in test. In addition, the production efficiency is low due to the need for multiple disassembly and assembly. Through this process, the housing 1 can be connected to an external power supply for a single test, and the number of process housings 1 can be increased according to actual production needs, and they can be powered on in series for use, which is both efficient and simple, greatly saving production operation time and improving production efficiency.

[0045] 2. The carbon brush contact area assessment is simple: using the process housing 1 of the present application, you only need to install the motor 3 and the process housing 1 and then power on to conduct a fine grinding test on the carbon brush. After the running-in assessment time is over, you can directly use a small tool to lift up the carbon brush to check the carbon brush contact area. The visualization is strong, and the pump body casing will not block the position as in the original inspection process. Only the outer wall of the pump body can be observed from the outside. Therefore, the spark level of each fine grinding of the carbon brush cannot be directly observed. If it does not meet the process requirements, directly reinstall and continue running-in until the carbon brush contact area meets the process requirements.

[0046] 3. Reduced quality risk: In the present application, the motor 3 that needs to be run-in is installed into the process housing 1, the wires are led out, and the DC power supply is turned on to make the motor 3 work. The original process requirements are not required. The carbon brush running-in of this type of motor 3 usually requires three steps to be coordinated as a whole: first, the overall assembly of the motor 3, then the overall assembly of the pump body, and finally the connection of the entire electric centrifugal pump to the test bench, and the overall running-in test process. The spark level and the carbon brush contact area can be directly and simply checked from the outside, thus avoiding the secondary introduction of quality problems caused by repeated disassembly and assembly.

[0047] 4. Improved safety: The original process may cause kerosene leakage into the motor 3 due to repeated assembly. The motor 3 is energized and the spark is too large, which may cause the kerosene to burn, posing a great safety hazard. The present application only needs to install the motor 3 that needs to be run-in into the process housing 1, lead out the wires, and power on the external DC power supply to realize the operation of the motor 3. Therefore, there is no need for a flammable working medium and its environment, which fundamentally eliminates the occurrence of this hazard.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric centrifugal pump motor brush running-in tool, characterized in that : It includes a process shell, and the process shell is sequentially provided with hole one, hole two and hole three inside, and the inner diameters of hole one, hole two and hole three decrease in sequence; a first bearing is provided in hole two, and a mounting portion is provided on the process shell at one end of hole one, and the process shell is detachably connected to the motor through the mounting portion, and the output shaft inside the motor passes through hole one and is arranged on the inner wall of the first bearing.

2. The electric centrifugal pump motor brush running-in tooling according to claim 1 is characterized in that: One end of the process shell is provided with a plurality of lubrication holes connected with the second hole.

3. The electric centrifugal pump motor brush running-in tooling according to claim 1 is characterized in that: The mounting portion is provided with an annular mounting groove, and the two sides of the mounting groove are respectively provided with a first limiting ring and a second limiting ring. One end of the motor is provided with a connecting portion, and the connecting portion is provided with an annular protrusion matched with the mounting groove.

4. The electric centrifugal pump motor brush running-in tooling according to claim 3 is characterized in that: The mounting portion is evenly distributed with a number of connection holes one on its circumference, a portion of the connection holes being connected to the mounting groove and a portion thereof penetrating through the second limiting ring arrangement; the connecting portion is evenly distributed with a number of connection holes two on its circumference, the connection holes two and the connection holes one being arranged opposite to each other, and a portion of the connection holes two penetrating through the annular protrusion arrangement.

5. The electric centrifugal pump motor brush running-in tooling according to claim 1, characterized in that: It also includes a base, on which a motor fixing seat is arranged, to which a motor is detachably connected, on which a slider is slidably arranged, a positioning seat is arranged at the upper end of the slider, and a process shell is rotatably arranged on the inner wall of the positioning seat; the positioning seat and the output shaft of the motor are coaxially arranged.

6. The electric centrifugal pump motor brush running-in tooling according to claim 5, characterized in that: The base is provided with a guide groove, the sliding block is slidably arranged in the guide groove, and a limit block is detachably arranged at one end of the guide groove.

7. The electric centrifugal pump motor brush running-in tooling according to claim 5, characterized in that: The inner wall of the positioning seat is provided with a second bearing, and the outer wall of the process housing is arranged closely against the inner wall of the second bearing.

8. The electric centrifugal pump motor brush running-in tooling according to claim 5, characterized in that: A fixing part is provided at the bottom end of the motor, a slot cooperating with the fixing part is provided at the upper end of the motor fixing seat, the fixing part is tightly arranged in the slot, and clamping cylinders are respectively provided on both sides of the motor fixing seat, a rotating head is rotatably connected to the piston rod of the clamping cylinder, a pressure block is connected to the rotating head, and the pressure block is arranged for clamping the upper end surface of the fixing part.

9. The electric centrifugal pump motor brush running-in tooling according to claim 8, characterized in that: A through limiting groove is arranged on the motor fixing seat outside the clamping groove, and the piston rod is slidably arranged close to the limiting groove.

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