Online turning tool special for high-pressure liquid nitrogen pump

Abstract

The utility model discloses a special online turning tool for a high-pressure liquid nitrogen pump, and relates to the technical field of high-pressure liquid nitrogen pumps. The utility model aims to solve the problems that a motor and a pump body need to be separated during troubleshooting of high-pressure liquid nitrogen pump equipment in the prior art, a whole rotor assembly sinks to the bottom of a pump cylinder body after the pump body is separated from the motor, a rotor is in contact with the cylinder body to generate friction, and turning cannot be carried out. The device comprises a bearing end cover, a bearing, a turning support plate and a lifting screw rod, the barring supporting disc is connected to the position over the pump body through the supporting screw, a bearing is arranged in the dead center of the barring supporting disc, a bearing end cover is arranged on the upper portion of the bearing, the lifting screw sequentially penetrates through the bearing end cover, the bearing and the barring supporting disc along the dead center of the barring supporting disc, and the lifting screw is used for being connected with a pump rotor assembly. The online turning device is used for online turning of the high-pressure liquid nitrogen pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure liquid nitrogen pump technical field, concretely relates to a kind of online turning gear tools special for high pressure liquid nitrogen pump. BACKGROUND

[0002] Current high pressure liquid nitrogen pump is installed vertically, motor is exposed on the top of pump box, pump body is in the inside of pump box, is supported and fixed by the top of pump box, pump rotor assembly is vertically hung on motor rotor, is connected by coupling in the middle, and there is no any connecting piece between pump cylinder body.

[0003] After high pressure liquid nitrogen pump equipment failure, according to normal procedure, the intermediate coupling is preferentially disconnected, whether the motor and pump body end are fault sources is judged respectively, but because high pressure liquid nitrogen pump body is in the inside of pump box, once the intermediate coupling is disconnected, the whole rotor assembly of pump will sink to the bottom of pump cylinder body, rotor and cylinder body contact and produce friction, turning gear cannot be carried out, whether pump body is fault cannot be judged, if pump body is directly removed and overhauled, pump box inside pearl sand is needed to be dug, pump inlet and outlet pipeline is needed to be thawed and handed over, the whole pump body is needed to be lifted out of pump box, not only cause overhauling time to be lengthened, but also cause excessive overhauling. SUMMARY

[0004] The utility model aims at solving the problem that in prior art, high pressure liquid nitrogen pump equipment needs to be disconnected when overhauled, after pump body is disconnected from motor, the whole rotor assembly will sink to the bottom of pump cylinder body, rotor and cylinder body contact and produce friction, turning gear cannot be carried out, and further provide a kind of online turning gear tools special for high pressure liquid nitrogen pump.

[0005] The utility model takes the technical scheme that a kind of online turning gear tools special for high pressure liquid nitrogen pump, including bearing end cover, bearing, turning gear support disc and lifting screw rod;The turning gear support disc is connected in the just above pump body by support screw rod, the just center of the turning gear support disc is provided with bearing, the upper portion of the bearing is provided with bearing end cover, the lifting screw rod sequentially passes through bearing end cover, bearing and turning gear support disc along the just center of the turning gear support disc, and lifting screw rod is used to connect pump rotor assembly.

[0006] Further, the just center of the turning gear support disc is provided with center clamping groove, the bearing is installed in the center clamping groove, the bearing end cover is installed at the top of the center clamping groove, and the just center of the center clamping groove is provided with through-hole.

[0007] Further, a plurality of screw rod through holes are evenly provided on the turning gear support disc along the axial circumference, the support screw rod passes through screw rod through hole, the upper end of support screw rod is connected with the turning gear support disc by fixed nut, and the lower end is connected with the pump body flange of high pressure liquid nitrogen pump.

[0008] Further, the upper end face and the lower end face of the disc rotating support disc are respectively provided with fixed nuts, the lower end of the supporting screw is threadedly connected with the pump body flange.

[0009] Further, the upper end of the lifting screw is connected with the central nut and the bearing end cover, and the lower end is connected with the pump rotor assembly.

[0010] Further, the lower end of the lifting screw is threadedly connected with the pump rotor assembly and locked by a nut.

[0011] Further, an adjusting washer is arranged between the bearing and the central slot, the adjusting washer is arranged at the lower part of the bearing, and the end faces of the bearing and the adjusting washer are arranged along the vertical direction.

[0012] Further, the bearing is a plane bearing.

[0013] Further, a through hole is formed in the central part of the bearing end cover, and a stepped surface is arranged at the lower end of the bearing end cover, and the stepped surface is sunken into the central slot.

[0014] The utility model has the following beneficial technical effects:

[0015] The bearing end cover, the bearing and the adjusting washer are arranged in the central slot of the disc rotating support disc, the disc rotating support disc is connected above the pump body through the supporting screw, and the lifting screw is used for connecting the pump rotor assembly. Through the special online disc rotating tool, the pump rotor assembly can be vertically hung after the motor is removed, disc rotating is free, the conditions of all parts in the pump body are checked, and fault analysis and judgment are facilitated.

[0016] When the high-pressure liquid nitrogen pump is overhauled, the pump body does not need to be directly removed for overhaul, the pearlite sand and the pump inlet and outlet pipelines in the pump box are not damaged, the overhaul period is short, and the pump body is avoided from being excessively overhauled. The disc rotating support disc is fixed above the pump body through the plurality of supporting screws in the online disc rotating process, is stable and reliable, is convenient to disassemble and assemble, has good adaptability, and has low maintenance cost. DRAWINGS

[0017] Figure 1 is a structural schematic view of the utility model;

[0018] Figure 2 is a top view of the utility model;

[0019] Figure 3 is a perspective view of the utility model;

[0020] Figure 4 is an exploded view of the utility model;

[0021] Figure 5 is a structural schematic view of another embodiment of the utility model;

[0022] Figure 6 Fig. 1 is a schematic diagram of the on-site installation of the high-pressure liquid nitrogen pump;

[0023] Figure 7 Fig. 2 is a structural schematic diagram of the high-pressure liquid nitrogen pump;

[0024] In the figure: 1, bearing end cover; 2, bearing; 3, adjusting gasket; 4, turning support disc; 401, screw rod through hole; 402, center clamping groove; 5, lifting screw rod; 6, center nut; 7, support screw rod; 8, fixing nut; 9, pump rotor assembly;

[0025] 10, pump body flange; 11, motor; 12, pump body; 13, pump box; 14, crank. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples of the specification, and the specific examples described are only used to explain the utility model and are not used to limit the utility model.

[0027] Specific implementation method one: in combination with Figure 1 to Figure 7 explain the embodiment, the high-pressure liquid nitrogen pump is a special pump device specially used for conveying liquid nitrogen and generating high pressure, and is widely used in industrial, scientific research, medical and other fields. The high-pressure liquid nitrogen pump often has high vibration and abnormal sound during operation, and these fault phenomena are usually caused by bearing failure, sealing friction, loose parts, rotor bending and the like; the pump body is not handed over to the maintenance state, and the on-line turning is checked to confirm the rotation flexibility, abnormal sound and vibration of the pump, so that more accurate fault diagnosis is made, thereby a targeted maintenance plan is made, and the whole maintenance process is more efficient.

[0028] After the high-pressure liquid nitrogen pump equipment fails, the intermediate coupling is preferentially disconnected according to the normal process, and it is judged whether the motor 11 and the pump body end are the fault sources, but because the high-pressure liquid nitrogen pump has the pump body 12 inside the pump box 13, once the intermediate coupling is disconnected, the whole rotor assembly of the pump will sink to the bottom of the pump cylinder body, the rotor and the cylinder body are in contact and generate friction, the turning cannot be performed, and it is not easy to judge whether the pump body is faulty. The embodiment is used for on-line turning of the high-pressure liquid nitrogen pump, Figure 6 to Figure 7 Fig. 1 is a schematic diagram of the on-site installation of the high-pressure liquid nitrogen pump; and Fig. 2 is a structural schematic diagram of the high-pressure liquid nitrogen pump, which are used to explain the embodiment.

[0029] The embodiment provides an online turning tool for a high-pressure liquid nitrogen pump, which comprises a bearing end cover 1, a bearing 2, a turning support disc 4 and a lifting screw rod 5; the turning support disc 4 is connected above the pump body through a support screw rod 7, the bearing 2 is arranged at the center of the turning support disc 4, the upper part of the bearing 2 is provided with the bearing end cover 1, and the lifting screw rod 5 passes through the bearing end cover 1, the bearing 2 and the turning support disc 4 in sequence along the center of the turning support disc 4, and the lifting screw rod 5 is used for connecting a pump rotor assembly 9.

[0030] In a preferred embodiment, the center of the turning support disc 4 is provided with a center clamping groove 402, the bearing 2 is arranged in the center clamping groove 402, the bearing end cover 1 is arranged at the top of the center clamping groove 402, and a through hole is arranged at the center of the center clamping groove 402.

[0031] In a preferred embodiment, a plurality of screw rod through holes 401 are uniformly arranged on the turning support disc 4 along the axial circumference, the support screw rod 7 passes through the screw rod through holes 401, the upper end of the support screw rod 7 is connected with the turning support disc 4 through a fixing nut 8, and the lower end is connected with a pump body flange 10 of the high-pressure liquid nitrogen pump.

[0032] In a preferred embodiment, the upper end face and the lower end face of the turning support disc 4 are respectively provided with the fixing nut 8, and the lower end of the support screw rod 7 is screw-connected with the pump body flange 10.

[0033] In a preferred embodiment, the upper end of the lifting screw rod 5 is connected with the bearing end cover 1 through a center nut 6, and the lower end is connected with the pump rotor assembly 9.

[0034] In a preferred embodiment, the lower end of the lifting screw rod 5 is screw-connected with the pump rotor assembly 9 and is locked through a nut.

[0035] In a preferred embodiment, a through hole is arranged at the center of the bearing end cover 1, and a stepped face is arranged at the lower end of the bearing end cover 1 and is sunken into the center clamping groove 402.

[0036] The center of the turning support disc 4 of the embodiment is provided with the center clamping groove 402, the bearing 2 is arranged in the center clamping groove 402, the bearing end cover 1 is arranged at the top of the center clamping groove 402, a through hole is arranged at the center of the center clamping groove 402, a through hole is also arranged at the center of the bearing end cover 1, the lifting screw rod 5 is connected with the pump rotor assembly 9 through the bearing end cover 1, the bearing 2, the adjusting gasket 3 and the center clamping groove 402, the pump rotor assembly is vertically hung after the motor is removed, the turning is free, the conditions of all parts in the pump body are checked, the fault analysis and judgment are facilitated, the pump body does not need to be directly removed for maintenance when the high-pressure liquid nitrogen pump is maintained, the pearlite and the pump inlet and outlet pipelines in the pump box are not damaged, the maintenance period is short, and the pump body is not excessively maintained.

[0037] Specific implementation two: combined Figure 1 To Figure 7 This embodiment is described, in which the bearing 2 and the center slot 402 are also provided with an adjusting washer 3, which is arranged at the lower part of the bearing 2, and the end faces of the bearing 2 and the adjusting washer 3 are arranged along the vertical direction.

[0038] In a preferred embodiment, the bearing 2 is a plane bearing, also known as a plane thrust bearing, which is composed of a rolling element plane retainer assembly and a washer, can prevent direct friction between different parts, and protects the mechanical system.

[0039] The other components and connection relationships are the same as those in specific implementation one.

[0040] Specific implementation three: combined Figure 1 To Figure 7 This embodiment is described, referring to Figure 5 It is described that the upper end of the lifting screw 5 is also provided with a crank 14 in this embodiment.

[0041] In this embodiment, the upper end of the lifting screw 5 is also provided with a crank 14, and after the lifting screw 5 is connected to the top hoisting hole of the pump rotor assembly 9, the pump rotor assembly 9 is rotated through the crank 14, which is convenient for online turning.

[0042] The other components and connection relationships are the same as those in specific implementation one.

[0043] Specific implementation four: combined Figure 1 To Figure 7 This embodiment is described, and the use method of the online turning tool is as follows:

[0044] After the motor at the upper part of the high-pressure liquid nitrogen pump is removed, four M16 long screws are installed by using the original jackscrew hole of the pump body flange 10, the turning support disc 4 is fixed above the pump body and leveled, the adjusting washer 3, the bearing 2 and the bearing end cover 1 are sequentially placed in the center slot 402 of the turning support disc 4, one M10 long screw is connected to the top hoisting hole of the pump rotor assembly 9, the center nut 6 is fastened, the pump rotor assembly 9 is gradually lifted to the normal running height, the center nut 6 is locked, and if there is no abnormality such as jamming and friction in the pump body, the rotor can be normally turned.

[0045] The other components and connection relationships are the same as those in specific implementation one.

[0046] The working principle of the utility model is:

[0047] The utility model relates to a kind of online turning gear tools special for high-pressure liquid nitrogen pump, turning gear tool includes bearing end cover 1, bearing 2, turning gear support disc 4 And lifting screw 5;Turning gear support disc 4 is connected in the immediate upper of the pump body of high-pressure liquid nitrogen pump by support screw 7, the positive center of turning gear support disc 4 is provided with bearing 2, the upper portion of bearing 2 is provided with bearing end cover 1, lifting screw 5 sequentially passes bearing end cover 1, bearing 2 And turning gear support disc 4 along the positive center of turning gear support disc 4, lifting screw 5 is used to connect pump rotor assembly 9.

[0048] High-pressure liquid nitrogen pump fault overhauls motor removal, using pump body flange 10 original's top screw hole, install four M16 long screw rod, turning gear support disc 4 is fixed in the immediate upper of pump body and is adjusted flat.In the center slot 402 of turning gear support disc 4 adjustment washer 3, bearing 2 And bearing end cover 1 are sequentially placed, the top lifting hole of pump rotor assembly 9 is connected by a M10 long screw rod, tight center nut 6 gradually promotes pump rotor assembly 9 To normal operating height, locks center nut 6, if pump body interior has no jam, friction etc.

[0049] The above-mentioned specific embodiment of the utility model does not constitute the limitation to the protection scope of the utility model. Any various other corresponding changes and deformations made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A high pressure liquid nitrogen pump dedicated on-line disc turning tool, characterized in that: The bearing end cover (1), the bearing (2), the turning support disc (4) and the lifting screw rod (5) are included. The turning support disc (4) is connected above the pump body of the high-pressure liquid nitrogen pump through the support screw rod (7), the bearing (2) is arranged at the center of the turning support disc (4), the upper part of the bearing (2) is provided with the bearing end cover (1), The lifting screw rod (5) passes through the bearing end cover (1), the bearing (2) and the turning support disc (4) along the center of the turning support disc (4) in sequence, and the lifting screw rod (5) is used for connecting the pump rotor assembly (9).

2. The online disc wheel turning tool for high pressure liquid nitrogen pump according to claim 1, characterized in that: The center clamping groove (402) is arranged at the center of the turning support disc (4), the bearing (2) is arranged in the center clamping groove (402), the bearing end cover (1) is arranged at the top of the center clamping groove (402), and a through hole is arranged at the center of the center clamping groove (402).

3. The online disc wheel turning tool for high pressure liquid nitrogen pump according to claim 1, characterized in that: A plurality of screw rod through holes (401) are uniformly arranged on the turning support disc (4) along the axial circumference, the support screw rod (7) passes through the screw rod through hole (401), the upper end of the support screw rod (7) is connected with the turning support disc (4) through the fixing nut (8), and the lower end is connected with the pump body flange (10) of the high-pressure liquid nitrogen pump.

4. The online disc wheel turning tool for high pressure liquid nitrogen pump according to claim 3, characterized in that: The upper end face and the lower end face of the turning support disc (4) are respectively provided with the fixing nut (8), and the lower end of the support screw rod (7) is screwed with the pump body flange (10).

5. The online high pressure nitrogen pump dedicated disc running tool according to claim 1, characterized in that: The upper end of the lifting screw rod (5) is connected with the bearing end cover (1) through the center nut (6), and the lower end is connected with the pump rotor assembly (9).

6. The online high-pressure nitrogen pump dedicated disc turning tool according to claim 5, characterized in that: The lower end of the lifting screw rod (5) is screwed with the pump rotor assembly (9) and is locked through the nut.

7. The online high pressure nitrogen pump dedicated disc running tool according to claim 1, characterized in that: The adjusting washer (3) is arranged between the bearing (2) and the center clamping groove (402), the adjusting washer (3) is arranged at the lower part of the bearing (2), and the end faces of the bearing (2) and the adjusting washer (3) are arranged along the vertical direction.

8. The online high-pressure nitrogen pump dedicated disc running tool according to claim 1, characterized in that: The bearing (2) is a plane bearing.

9. The online high pressure nitrogen pump dedicated disc wheel turning tool according to claim 1, characterized in that: The through hole is arranged at the center of the bearing end cover (1), the lower end of the bearing end cover (1) is provided with a stepped surface, and the stepped surface is sunken into the center clamping groove (402).

Images