Oilfield Large Pump Bearing High-Strength Pulling Device

Abstract

This utility model relates to the technical field of oilfield maintenance equipment, specifically disclosing a powerful pull-out device for large pump bearings used in oilfields. It includes a crossbeam with a main shaft hole in the middle and symmetrical through holes on both sides. A lead screw is slidably connected to each through hole. A guide groove is provided axially on the outer circumferential surface of the lead screw, and a guide protrusion that slides within the through hole engages with the guide groove. A nut is threaded to the upper end of the lead screw, and a T-head is fixedly connected to the lower end. The transverse ends of the two T-heads are arranged relatively parallel, and a baffle is detachably connected between the same-side ends of the transverse ends of the two T-heads. This utility model features a simple and compact structure, is not limited by working space, and increases the force-bearing area during bearing pull-out compared to currently used hydraulic three-jaw pullers, thereby preventing damage to the bearing.

Description

Technical Field

[0001] This utility model relates to the field of oilfield maintenance equipment technology, specifically to a high-strength pull-out device for large pump bearings used in oilfields. Background Technology

[0002] The production and operation of Shengli Oilfield's power plant, heating, water supply, oil production, and gathering and transportation units all rely on pumps to pressurize the pipeline network, thereby achieving the goal of efficiently transporting various fluid media. After long-term operation, pump equipment inevitably experiences abnormal operating conditions or sudden failures. To ensure high-quality and efficient production operation, regular maintenance or emergency repairs of pump equipment are required. Small pumps can usually easily remove the bearing using a three-pronged puller (such as a hydraulic puller disclosed in patent number: CN200520015088.0). However, for large pumps with a capacity of 560 kW or more, the distance between the top of the shaft and the bearing is more than 60 cm, which limits the pulling length of the three-pronged puller and makes it impossible to complete the operation of removing the baffle and bearing. Lengthening and modifying the three-pronged puller lacks stability and tensile strength. At the same time, the bearing baffle is easily cracked due to the point contact with the puller claws, causing the component to be scrapped. Through investigation of existing large puller devices, it is found that due to space limitations, they are not suitable for on-site maintenance of pumps, which seriously affects the efficiency of maintenance and also poses significant safety hazards during operation. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a powerful pull-out device for large pump bearings in oil fields. It features a simple and compact structure, is not limited by working space, and increases the force-bearing area during bearing pull-out compared to the currently used hydraulic three-jaw puller, thereby avoiding damage to the bearing.

[0004] The technical solution of this utility model is: a high-power pulling device for large pump bearings in oil fields, including a crossbeam, a main shaft hole in the middle of the crossbeam, and through holes symmetrically provided on both sides, with a lead screw slidably connected in each through hole; The lead screw has a guide groove along the axial direction on its outer peripheral surface, and a guide protrusion that slides in the through hole to cooperate with the guide groove. The upper end of the lead screw is threaded with a nut, and the lower end of the lead screw is fixedly connected with a T-head. The lateral ends of the two T-heads are arranged in parallel relative to each other, and a baffle is detachably connected between the same side ends of the lateral ends of the two T-heads.

[0005] Preferably, the baffle is provided with sleeve holes at both ends for fitting into the lateral end of the T-shaped head.

[0006] Preferably, a spring is fitted on the outer side of the lead screw, and the two ends of the spring support the crossbeam and the T-head, respectively.

[0007] Preferably, the two baffles are provided with inwardly extending retaining plates on opposite sides.

[0008] Preferably, the two card plates are provided with corresponding arc-shaped grooves.

[0009] Preferably, the crossbeam has a through groove corresponding to the axial direction of the spindle hole, and a slider is slidably connected in the through groove. The slider has a stepped variable diameter groove corresponding to the axial direction of the spindle hole.

[0010] Preferably, the slider has limiting blocks at both ends that are larger than the size of the through groove.

[0011] Preferably, a triangular reinforcing rib is provided between the transverse end and the longitudinal end of the T-shaped head.

[0012] Compared with the prior art, this utility model has the following advantages: This utility model features a simple and compact structure, is not limited by the working space, and increases the force-bearing area during bearing pulling compared to the currently used hydraulic three-jaw puller, thereby avoiding damage to the bearing.

[0013] The two clamping plates have corresponding arc-shaped grooves. When assembling, the pump shaft is inserted into the arc-shaped grooves, increasing the depth of the clamping plate into the inner gap of the bearing, thereby increasing the contact area with the bearing and thus increasing the bearing's stress area. This further avoids the risk of damage to the bearing during pull-out due to stress concentration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the crossbeam; Figure 3 This is a structural diagram of the lead screw and T-head; Figure 4 This is a reference diagram for the use of this utility model; Figure 5 This is a schematic diagram of the assembly of the slider and the spring; Figure 6 This is a schematic diagram of the slider's structure; Figure 7 This is a schematic diagram of the structure of the baffle and the clamping plate; In the diagram: 1. Crossbeam, 2. Lead screw, 3. T-head, 4. Nut, 5. Spindle hole, 6. Baffle, 7. Through hole, 8. Guide protrusion, 9. Guide groove, 10. Reinforcing rib, 11. Horizontal end, 12. Longitudinal end, 13. Shaft, 14. Bearing, 15. Slider, 16. Spring, 17. Stepped diameter reducing groove, 18. Limiting block, 19. Sleeve hole, 20. Clamping plate, 21. Arc-shaped groove. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0016] like Figures 1 to 3 A high-powered pull-out device for bearings of large pumps used in oil fields includes a crossbeam 1. The crossbeam 1 has a main shaft hole 5 in the middle and through holes 7 symmetrically arranged on both sides. A lead screw 2 is slidably connected in each through hole 7.

[0017] The lead screw 2 has a guide groove 9 along the axial direction on its outer peripheral surface, and a guide protrusion 8 that slides in the through hole 7 to cooperate with the guide groove 9. The upper end of the lead screw 2 is threadedly connected to a nut 4, and the lower end of the lead screw 2 is fixedly connected to a T-head 3.

[0018] The lateral ends 11 of the two T-heads 3 are arranged in parallel relative to each other, and a baffle 6 is detachably connected between the same-side ends 11 of the two T-heads 3. The specific detachable connection structure is as follows: Figure 6 The baffle 6 has sleeve holes 19 at both ends that fit into the horizontal end 11 of the T-head 3. By inserting the horizontal end 11 of the T-head 3 into the sleeve holes 19 of the baffle 6, the baffle 6 and the T-head 3 can be detachably connected.

[0019] Working principle: such as Figure 4 First, place the present invention horizontally. Then, insert the end of the pump shaft 13 into the main shaft hole 5, and make the outermost stepped surface of the shaft 13 press against the crossbeam 1. Then, tighten the two nuts 4, and then drag the two T-heads 3 to the inner clearance position of the bearing 14. Then, connect the two baffles 6 to the two T-heads 3 respectively. The installation is now complete. Figure 4 The state shown; Then, the nut 4 is turned in the opposite direction. With the threaded engagement between the nut 4 and the lead screw 2, the lead screw 2 moves outward. The two baffles 6 support the inner side of the bearing 14 and pull the bearing 14 outward, thereby pulling the bearing 14 out.

[0020] Compared with the currently used hydraulic three-jaw puller, this utility model is more flexible in assembly and movement. Moreover, by using the baffle 6 to support the bearing 14 and pull it outward, compared with the way the three-jaw hooks the bearing 14 and pulls it outward, the force-bearing area of ​​the bearing 14 is greatly increased, thereby avoiding damage to the bearing 14. In addition, compared with the hydraulic three-jaw puller, this utility model has the characteristics of simple and compact structure, thus not being limited by the working space, and has lower use and manufacturing costs.

[0021] By opening a guide groove 9 on the lead screw 2 and setting a guide protrusion 8 in the through hole 7 that slides in the guide groove 9, the lead screw 2 is prevented from rotating in the through hole 7, so that the two T-heads 3 are kept relatively parallel. Example 2

[0022] This embodiment is a further optimization based on the above embodiment, specifically: like Figure 5 A spring 16 is fitted on the outer side of the lead screw 2, and the two ends of the spring 16 support the crossbeam 1 and the T-head 3 respectively.

[0023] When the nut 4 is turned, the T-head 3 moves away from the crossbeam 1 through the elastic support of the spring 16, which avoids the lead screw 2 from sliding and shifting the T-head 3 when the present invention is installed horizontally, making it more convenient to use. Example 3

[0024] This embodiment is a further optimization based on the above embodiment, specifically: like Figure 6 The two baffles 6 are respectively provided with a card plate 20 extending inward on one side of their opposite sides.

[0025] The gap inside the bearing 14 of some pumps is small, and the clamping plate 20 has a certain thickness and is difficult to be inserted into the gap. By adding a relatively thin clamping plate 20, it is easier to insert into the gap and support the bearing 14. In addition, arc-shaped grooves 21 are provided on the two clamping plates 20. When the pump shaft 13 is assembled, it is inserted into the arc-shaped grooves 21, increasing the depth of the clamping plate 20 inserted into the inner gap of the bearing 14, thereby increasing the contact area with the bearing 14 and thus increasing the force-bearing area of ​​the bearing 14, further avoiding the risk of damage to the bearing 14 during pull-out due to the problem of force concentration. Example 4

[0026] This embodiment is a further optimization based on the above embodiment, specifically: like Figure 5 and Figure 7 A through groove corresponding to the axial direction of the main shaft hole 5 is provided on the crossbeam 1. A slider 15 is slidably connected to the through groove. A stepped variable diameter groove 17 corresponding to the axial direction of the main shaft hole 5 is provided on the slider 15.

[0027] The stepped variable diameter groove 17 forms multiple different shafts 13 with varying widths, which can accommodate various pump shafts 13 with smaller outer diameters than the main shaft hole 5, thereby improving the flexibility of this utility model.

[0028] In addition, limit blocks 18 larger than the through groove size are provided at both ends of the slider 15. The limit blocks 18 prevent the slider 15 from disengaging from the through groove, making the structure more reasonable and the use more convenient. Example 5

[0029] This embodiment is a further optimization based on the above embodiment, specifically: like Figure 3 In this embodiment, a triangular reinforcing rib 10 is provided between the transverse end 11 and the longitudinal end 12 of the T-head 3. By adding the triangular reinforcing rib 10, the structural strength of the T-head 3 is improved, thereby improving the reliability and stability of the present invention during the pulling operation.

[0030] This utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model, and the changed content still falls within the protection scope of this utility model.

Claims

1. A heavy-duty drawing device for oilfield large machine pump bearings, characterized in that: The device includes a crossbeam, which has a main shaft hole in the middle and through holes symmetrically arranged on both sides. A lead screw is slidably connected in each of the through holes. The lead screw has a guide groove along the axial direction on its outer peripheral surface, and a guide protrusion that slides in the through hole to cooperate with the guide groove. The upper end of the lead screw is threaded with a nut, and the lower end of the lead screw is fixedly connected with a T-head. The lateral ends of the two T-heads are arranged in parallel relative to each other, and a baffle is detachably connected between the same side ends of the lateral ends of the two T-heads.

2. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 1, wherein: The baffle is provided with sleeve holes at both ends for fitting into the lateral end of the T-shaped head.

3. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 1, wherein: A spring is fitted on the outside of the lead screw, and the two ends of the spring support the crossbeam and the T-head, respectively.

4. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 1, wherein: The two baffles are provided with a retaining plate extending inward on the opposite side.

5. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 4, wherein: The two card plates are provided with corresponding arc-shaped grooves.

6. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 1, wherein: The crossbeam has a through groove corresponding to the axial direction of the spindle hole, and a slider is slidably connected in the through groove. The slider has a stepped variable diameter groove corresponding to the axial direction of the spindle hole.

7. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 6, wherein: The slider has limit blocks at both ends that are larger than the size of the through slot.

8. The heavy-duty drawbench for oilfield pump bearing as claimed in claim 1, wherein: The T-shaped head has a triangular reinforcing rib between its horizontal and vertical ends.

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