CN115156877A - Special device for disassembling and assembling main pump oil seal - Google Patents
Special device for disassembling and assembling main pump oil seal Download PDFInfo
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- CN115156877A CN115156877A CN202110356845.4A CN202110356845A CN115156877A CN 115156877 A CN115156877 A CN 115156877A CN 202110356845 A CN202110356845 A CN 202110356845A CN 115156877 A CN115156877 A CN 115156877A
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- oil seal
- adjusting plate
- floating adjusting
- screw
- main pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/025—For detaching only
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- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses an oil seal dismounting device suitable for a main pump, which comprises a nut, wherein the nut and a worm wheel are coaxially sleeved together; the roller path is embedded in a positioning groove of the transmission case; the floating adjusting plate and the steel ball are fixed with the transmission box into a whole through a fine-tooth screw; the outer conical surface at the upper end of the planetary roller screw is precisely matched and connected with the inner conical hole at the lower end surface of the middle shaft; the lower taper sleeve is connected with the planetary roller screw through threads; the spiral micrometer is fixedly arranged on a connecting plate, and the connecting plate is fixed on two side surfaces of the transmission case; the wireless pocket camera is arranged in a groove of the floating adjusting plate, the floating adjusting plate is fixedly arranged on the oil seal, and the laser displacement sensor is fixedly arranged on the floating adjusting plate. The invention has the beneficial effects that: the operation is simple, the practicability is high, the working strength of operators is reduced, the working efficiency is improved, and the maintenance period is shortened.
Description
Technical Field
The invention belongs to the field of nuclear power overhaul, and particularly relates to a main pump oil seal dismounting device.
Background
The assembly precision of the oil seal assembly of the main pump bearing box of the existing nuclear power plant is high, and the original dismounting tool has congenital defects:
1. the self-positioning of the tool adopts the positioning of a jacking lead screw connecting rod and a main shaft protection cone, and the precise positioning and centering can not be provided for oil sealing;
2. the jacking screw rod is adopted to rotate (the positioning base is not fixed), so that the stress eccentricity of the coupling is easily caused during disassembly and assembly;
3. when the device is assembled and disassembled, the output torque is uncontrollable, whether the device is jammed or not can be judged only by experience, and excessive force is easy to apply. So often take place the jam phenomenon at oil seal assembly dismantlement in-process, cause the pulling of shaft coupling hole, pump shaft and motor shaft.
Therefore, a special tool with accurate positioning, self-adjusting centering and adjustable and controllable output drawing force needs to be developed so as to ensure that the inner hole of the coupling, the pump shaft and the like are not damaged and smoothly realize the sequential disassembly of the oil sealing assembly.
Disclosure of Invention
The invention aims to provide a main pump oil seal dismounting device which is accurate in positioning, capable of self-adjusting and centering, adjustable and controllable in output drawing force, capable of ensuring that no damage is caused to a coupling inner hole, a pump shaft and the like, and capable of smoothly realizing the sequential dismounting of an oil seal assembly.
The technical scheme of the invention is as follows: a device suitable for disassembling and assembling main pump oil seal,
the worm gear and the worm are in meshed transmission connection, and the worm is axially and rigidly fixed in a transmission case;
the roller path is embedded in the positioning groove of the transmission case;
the floating adjusting plate and the steel ball are fixed with the transmission box into a whole through a fine-tooth screw;
the outer conical surface at the upper end of the planetary roller screw is in precise fit connection with the inner conical hole at the lower end surface of the middle shaft;
the lower taper sleeve is connected with the planetary roller screw through threads;
the screw micrometer is fixedly arranged on a connecting plate, and the connecting plate is fixed on two side surfaces of the transmission case;
the wireless pocket camera is arranged in a groove of the floating adjusting plate, the floating adjusting plate is fixedly arranged on the oil seal, and the laser displacement sensor is fixedly arranged on the floating adjusting plate.
The worm wheel, the screw nut and the bearing are axially fixed by the precision nut.
And lower raceway steel balls are uniformly distributed on the circumference of the raceway.
The wireless pocket camera transmits the observation image to the visual handheld receiving device in real time in a wireless mode so as to observe whether the oil seal is inclined or not during installation.
The visual handheld receiving device comprises a mobile phone, a tablet personal computer and a notebook computer.
The laser displacement sensors are 4 groups.
And the measuring head of the spiral micrometer props against the lower end face of the oil seal body.
The invention has the beneficial effects that: the operation is simple, the practicability is high, the working strength of operators is reduced, the working efficiency is improved, and the maintenance period is shortened.
Drawings
FIG. 1 is a schematic view of an oil seal mounting and dismounting device for a main pump according to the present invention;
FIG. 2 is a sectional view taken along line C-C.
In the figure: the device comprises a central shaft 1, fine-tooth screws 2, a conical surface pad 3, a screw upper spacer pad 4, a screw spacer sleeve 5, a connecting plate 6, a raceway 7, a micrometer screw 8, a screw nut 9, a conical sleeve 10, a worm 11, a worm gear 12, a bearing 13, a bearing gland 14, a floating adjusting plate 15, a floating adjusting plate 16, a planetary roller screw 17, a guide sleeve 18, a wireless pocket camera 19, a transmission case 20, a laser displacement sensor 21, a pump shaft 22, a flat key 23, an oil seal 24, a first steel ball 25 and a second steel ball 26.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The invention ensures that the oil seal is assembled and disassembled smoothly without damaging the inner hole of a coupling, a pump shaft and a motor shaft, adopts the matching of the planetary roller screw with large bearing capacity, the screw nut and the bearing, converts the spiral motion of the screw nut and the planetary roller screw into linear motion under the condition that the screw nut is not moved, and provides the upper jacking force and the lower pulling force when the oil seal assembly is assembled and disassembled.
By means of the upper end shaft center one-way positioning, accurate positioning and centering can be achieved, the upper and lower double-ball roller path mode is adopted, the self horizontal displacement compensation and verticality adjusting functions of the device are achieved, the oil sealing assembly can be effectively guaranteed to ascend and descend along the straight line direction, and eccentricity cannot be generated.
The worm and gear boosting transmission and the operation combination of the adjustable torque wrench can provide controllable and uniform power, and avoid the damage to the matching surface of the related components caused by overlarge stress during the installation or disassembly of equipment.
As shown in fig. 1 and 2, the device for disassembling and assembling the oil seal of the main pump comprises a middle shaft 1, a fine-pitch screw 2, a conical surface pad 3, a nut upper spacer 4, a screw spacer 5, a connecting plate 6, a roller path 7, a micrometer screw 8, a nut 9, a lower conical sleeve 10, a worm 11, a worm wheel 12, a bearing 13, a bearing gland 14, a lower floating adjusting plate 15, a floating adjusting plate 16, a planetary roller screw 17, a guide sleeve 18, a wireless pocket camera 19, a transmission case 20 and a laser displacement sensor 21.
The screw nut 9 and the worm wheel 12 are coaxially sleeved together, the worm wheel 12 and the bearing 13 are coaxially sleeved together, the worm wheel 12, the screw nut 9, the bearing 13 and the like are axially fixed by precision nuts, the worm wheel 12 is in meshed transmission connection with the worm 11, the worm 11 is axially and rigidly fixed in the transmission case 20, the circumferences of the lower raceway steel balls are uniformly distributed on the raceway 7, and the raceway 7 is embedded in a positioning groove of the transmission case; the steel balls of the upper raceway are uniformly distributed on the lower floating adjusting plate 15 in the circumference, and the floating adjusting plate 16 and the steel balls are fixed with the transmission case 20 into a whole through fine-tooth screws 2. The outer conical surface at the upper end of the planetary roller screw 17 is in precise fit connection with the inner conical hole at the lower end surface of the middle shaft 1. The lower cone sleeve 10 is connected with the planetary roller screw 17 through threads. The spiral micrometer 8 is fixedly arranged on the connecting plate 6, the connecting plate 6 is fixed on two side surfaces of the transmission case 20, a measuring head of the spiral micrometer 8 is propped against the lower end surface of the oil seal body, and the movable ruler part of the micrometer 8 is rotated to be adjusted during adjustment. The wireless pocket camera 19 is installed in the groove of the floating adjusting plate 16, the floating adjusting plate 16 is fixedly installed on the oil seal, the wireless pocket camera 19 is aligned to the installation position of the flat key, and the wireless pocket camera transmits an observation image to a visual handheld receiving device (such as a mobile phone, a tablet personal computer and a notebook personal computer) in real time in a wireless mode so as to observe whether the oil seal is inclined or not during installation. 4 groups of laser displacement sensors 21 are installed and fixed on the floating adjusting plate 16.
The invention can realize the following functions:
1) Guiding and positioning: the outer diameter of the guide sleeve is consistent with the inner diameter of the oil seal pump shaft sleeve and is precisely matched together, an inner hole is matched with the middle shaft to form a whole, and the conical surface at the rear end of the middle shaft is designed to be precisely positioned by a conical hole of a top pinhole of the motor pump shaft; meanwhile, the precision matching precision with the matching surface of the motor shaft is ensured. The positioning plate can be effectively ensured to be coaxial with a motor shaft, and an accurate positioning reference is provided for screw installation.
2) Fixing a screw rod: the outer conical surface at the upper end of the screw rod is precisely matched with the inner conical hole at the lower end surface of the middle shaft; meanwhile, a lower taper sleeve at the lower end of the screw rod is in threaded connection with the screw rod, and the lower taper sleeve is positioned and fixed through an inner taper hole of a lower connecting shaft of the main pump shaft. When the screw rod fixing device is used, the lower taper sleeve is rotated to realize rigid fixation of the screw rod. The oil seal is connected with the transmission case and then moves up and down along the screw rod integrally. The problem of coaxiality swing caused by the rotation of the screw rod is avoided;
3) The levelness monitoring function of the oil seal assembly is as follows: the dismounting device design has laser displacement sensor, the circumferencial direction evenly arranges 4 groups, laser displacement sensor rigidity is fixed on the regulating plate that floats, use pump shaft lower extreme face as the detection benchmark, through reading the data on each sensor of contrast, data pass through data line real-time transmission to visual interface, real-time supervision contrast oil seal assembly tear open, the levelness of dress in-process relative to the motor pump, the levelness difference value fine motion adjustment micrometering value according to four groups of check points, make oil seal assembly dismounting process control at the horizontal precision all the time, ensure that oil seal assembly does not receive overload moment damage.
4) Displacement compensation and straightness regulatory function that hangs down: the device design adopts the design of a spherical double-raceway precise ball and a floating adjusting plate, the upper ball is in spherical contact with the floating adjusting plate and a ball retainer, and the micro-motion angle of the floating adjusting plate is adjusted by adjusting a screw micrometer on the side surface of a transmission case so as to realize the self-adjusting function of verticality. The lower plane ball can move integrally on the stress surface along any direction, and angular displacement compensation is effectively realized.
5) High efficiency and labor saving: the worm gear and worm speed reduction and force increase mechanism provides rotating power for the planetary screw, so that the input torque can be effectively reduced, and the working strength of operators is reduced. The worm gear and worm device can be manually matched with an adjustable torque wrench for use; the input torque of the electric screwdriver can be adopted, the input torque can be accurately adjusted by the electric screwdriver, key parts such as a coupling inner hole, a pump shaft and a motor shaft are prevented from being damaged, and the safety of the main pump oil sealing device is guaranteed.
6) The moment is controllable: an adjustable torque wrench input interface is designed in front of the worm gear, so that the equipment is prevented from being drawn and damaged due to overload, and data parameters such as the jacking torque required by equipment installation and the pull-down torque required by disassembly can be preset in the debugging process.
7) The disassembly and the assembly are convenient: the device is designed in a modularized way, and only a plurality of modules (a guide positioning module, a planetary roller screw module, a worm and gear module and a floating adjusting module) need to be simply assembled on site. The complex parts are not required to be assembled, and foreign matter risks such as small pieces falling off are avoided.
This dismounting device is accurate metalworking part, chooses for use the material processing preparation completion that is fit for on-the-spot operating mode, and concrete equipment step is as follows:
1) The worm wheel is connected with the screw nut and the bearing
The nut 9 and the worm wheel 12 are coaxially sleeved together, the worm wheel 12 and the bearing 13 are coaxially sleeved together, and the worm wheel 12, the nut 9, the bearing 13 and the like are fixed by precise nuts in the axial direction.
2) Worm wheel and worm connection
The worm 11 is axially and rigidly fixed in the transmission case 20, and the worm wheel 12 is in meshed transmission connection with the worm 11.
3) Floating adjusting plate and steel ball adjusting device
The lower raceway steel balls are uniformly distributed on the raceway 7 in the circumference, and the raceway 7 is embedded in a positioning groove of the transmission case; the upper raceway steel balls are circumferentially and uniformly distributed on the lower floating adjusting plate 15. The floating adjusting plate 16 and the steel ball are fixed with the transmission case 20 into a whole through the fine-thread screw 2.
4) The planetary roller screw is connected with the middle shaft in a positioning way
The outer conical surface at the upper end of the planetary roller screw 17 is in precise fit connection with the inner conical hole at the lower end surface of the middle shaft 1.
5) The lower taper sleeve is connected with the planetary roller screw
The lower cone sleeve 10 is connected with the planetary roller screw 17 through threads.
6) The screw micrometer is connected with the transmission case
The spiral micrometer 8 is fixedly arranged on the connecting plate 6, the connecting plate 6 is fixed on two side surfaces of the transmission case 20, a measuring head of the spiral micrometer 8 is propped against the lower end surface of the oil seal body, and the movable ruler part of the micrometer 8 is rotated to be adjusted during adjustment.
7) Wireless pocket camera connection
The wireless pocket camera 19 is installed in a groove of the floating adjusting plate 16, the floating adjusting plate 16 is fixedly installed on the oil seal, the wireless pocket camera 19 is aligned to the installation position of the flat key, and the wireless pocket camera transmits an observation image to a visual handheld receiving device (such as a mobile phone, a tablet computer and a notebook computer) in real time in a wireless mode so as to observe whether the oil seal is inclined or not during installation.
8) Laser displacement sensor connection
4 groups of laser displacement sensors 21 are fixedly arranged on the floating adjusting plate 16.
Claims (7)
1. The utility model provides a be applicable to main pump oil seal dismouting device which characterized in that:
the worm gear and the worm are in meshed transmission connection, and the worm is axially and rigidly fixed in a transmission case;
the roller path is embedded in the positioning groove of the transmission case;
the floating adjusting plate and the steel ball are fixed with the transmission box into a whole through fine-tooth screws;
the outer conical surface at the upper end of the planetary roller screw is in precise fit connection with the inner conical hole at the lower end surface of the middle shaft;
the lower taper sleeve is connected with the planetary roller screw through threads;
the screw micrometer is fixedly arranged on a connecting plate, and the connecting plate is fixed on two side surfaces of the transmission case;
the wireless pocket camera is arranged in a groove of the floating adjusting plate, the floating adjusting plate is fixedly arranged on the oil seal, and the laser displacement sensor is fixedly arranged on the floating adjusting plate.
2. The device for assembling and disassembling the oil seal of the main pump according to claim 1, wherein: the worm wheel, the screw nut and the bearing are axially fixed by the precision nut.
3. The device for assembling and disassembling the oil seal of the main pump according to claim 1, wherein: and lower raceway steel balls are uniformly distributed on the circumference of the raceway.
4. The apparatus of claim 1, wherein: the wireless pocket camera transmits the observation image to the visual handheld receiving device in real time in a wireless mode so as to observe whether the oil seal is inclined or not during installation.
5. The apparatus of claim 4, wherein: the visual handheld receiving device comprises a mobile phone, a tablet personal computer and a notebook computer.
6. The device for assembling and disassembling the oil seal of the main pump according to claim 1, wherein: the laser displacement sensors are 4 groups.
7. The apparatus of claim 1, wherein: and the measuring head of the spiral micrometer is supported against the lower end face of the oil seal body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356845.4A CN115156877A (en) | 2021-04-01 | 2021-04-01 | Special device for disassembling and assembling main pump oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356845.4A CN115156877A (en) | 2021-04-01 | 2021-04-01 | Special device for disassembling and assembling main pump oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115156877A true CN115156877A (en) | 2022-10-11 |
Family
ID=83475909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110356845.4A Pending CN115156877A (en) | 2021-04-01 | 2021-04-01 | Special device for disassembling and assembling main pump oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115156877A (en) |
-
2021
- 2021-04-01 CN CN202110356845.4A patent/CN115156877A/en active Pending
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