Tool for detecting circle run-out of rotary joint in field of drilling pumps

Abstract

The utility model discloses a tool for detecting circle run-out of a rotary joint in the field of drilling pumps, relates to the technical field of drilling pumps, and aims to solve the technical problems that a rotary joint manufacturing unit exits a factory to check the circle run-out of the rotary joint, and whether the circle run-out of the rotary joint is qualified or not when the rotary joint purchased by a using unit enters the factory to check. The technical scheme adopted by the utility model is as follows: only a drilling pump rack part for simulating a crankshaft mounting hole is required, a drilling pump crankshaft end part is simulated, and the drilling pump crankshaft end part is simulated; the tool for detecting the circle run-out of the rotary joint in the field of the drilling pump is composed of other simple parts and standard parts such as bolts and nuts, the structure is simple, the cost is low, and the technical problem of detecting the circle run-out of the rotary joint in the field of the drilling pump can be solved.

Description

Technical Field

[0001] This utility model relates to the field of drilling pumps, and particularly to a tool for detecting the circular runout of rotary joints in the field of drilling pumps. Background Technology

[0002] A type of drilling pump uses rotary joints mounted on both ends of the crankshaft. These rotary joints mainly consist of three parts: a joint body assembly, rolling bearings, and a pipe fitting assembly. The joint body assembly connects to the oil pipes output from the drilling pump's lubrication oil pump, while the pipe fitting assembly connects to the rotating crankshaft and rotates with it. Rolling bearings are located between the joint body assembly and the pipe fitting assembly, which rotates with the crankshaft. Lubricating oil channels are present within both the joint body assembly and the pipe fitting assembly. Lubricating oil is output from the lubrication oil pump, passes through the oil pipes—joint body assembly—pipe fitting assembly inner bore—and enters the lubrication system within the crankshaft to lubricate the connecting rod bearings. This type of structure often results in damage to the pipe fitting assembly. The observed phenomenon is that, during crankshaft rotation, the position of the rotary joint assembly relative to the crankshaft constantly fluctuates. This causes the connection between the joint assembly and the oil pipe output from the drilling pump's lubrication pump to also fluctuate. Since the drilling pump's lubrication pump and its output oil pipe are fixed at the pump end, this constant fluctuation at one end, along with the joint assembly, creates an undue dynamic load on the pipe fitting assembly. Prolonged dynamic load will eventually damage the pipe fitting assembly. One reason for this constant fluctuation in the position of the rotary joint assembly relative to the crankshaft during crankshaft rotation is the inherent circular runout of the rotary joint itself. Although drilling pump users have design requirements for the circular runout of the rotary joint, this runout is only revealed when the crankshaft is rotating. Therefore, it's difficult to inspect the rotary joint when it's not rotating, such as during the manufacturer's factory inspection or the user's incoming inspection. Quality problems only surface during drilling pump assembly. Once discovered, there's insufficient time to replace the rotary joint with a qualified one, reducing the overall accuracy of the drilling pump design. Remaking a qualified rotary joint would severely impact the assembly schedule. Therefore, a tool is needed to inspect the circular runout of the rotary joint itself. This tool should allow for inspection at the manufacturer's factory and during the user's incoming inspection to ensure the runout is within acceptable limits. This is crucial to avoid both reducing the overall drilling pump design accuracy and delaying the final assembly schedule, making it an urgent problem to solve. Summary of the Invention

[0003] The purpose of this invention is to provide a tool for detecting the circular runout of rotary joints in the field of drilling pumps.

[0004] The technical solution of this utility model is as follows:

[0005] The technical solution of this utility model includes a tool mounting base, bolts, retaining rings, an open-end wrench, a portion of a drilling pump frame simulating a crankshaft hole, a nut, a portion of the crankshaft end simulating a drilling pump, a plug, a rotary joint, a dial indicator and its base, a horizontal surface of the tool mounting base, bolts for T-slots, a retaining ring end face, a retaining ring bolt through hole, a portion of the simulated crankshaft hole on the simulated frame, a portion of the simulated frame front end face, a portion of the simulated frame rear end face, a portion of the simulated frame bolt through hole, a portion of the simulated frame clamping step surface, a portion of the simulated frame clamping bolt through hole, and a portion of the simulated frame mounting... The components include: a bottom surface, a locating inner hole at the end of a simulated drilling pump crankshaft, a locating end face at the end of a simulated drilling pump crankshaft, a locating outer circle at the end of a simulated drilling pump crankshaft, an internal thread at the end of a simulated drilling pump crankshaft, a hexagonal drive to rotate the end of a simulated drilling pump crankshaft, an ejector rotary joint internal thread hole, a guide hole, a pipe joint assembly, a rolling bearing, a joint body assembly, a locating outer circle of the pipe joint assembly, a locating end face of the pipe joint assembly, a through hole for installing clamping bolts in the pipe joint assembly, a measuring outer circle of the pipe joint assembly, an internal thread hole for installing the oil pipe joint in the pipe joint assembly, a dial indicator base, and a dial indicator contact.

[0006] When testing the rotary joint's circular runout, the simulated drilling pump frame mounting section of the crankshaft bore is fixed. This is achieved by mounting the bottom surface of the simulated frame mounting section onto the tool mounting base. Two T-slot bolts pass through the two simulated frame mounting section's clamping bolt through-holes and are tightened onto the clamping step surface of the simulated frame mounting section with two nuts. The dial indicator contact is also fixed. This is achieved by placing the dial indicator and its holder on the tool mounting base, adjusting its position, and then securing it with the magnetism of the dial indicator and its holder. The rotary joint and the simulated drilling pump crankshaft end section are connected together using four bolts, each passing through the clamping bolt through-holes of the pipe joint assembly and screwed into the internal threads of the simulated drilling pump crankshaft end. After the rotary joint and the simulated drilling pump crankshaft end are partially connected, they rotate simultaneously within the simulated crankshaft bore of the simulated frame. The outer diameter of the pipe joint assembly also rotates. This rotation is achieved by using an open-end wrench to rotate the hexagonal mechanism that drives the simulated drilling pump crankshaft end. The reason for this rotation is that as the pipe joint assembly and rolling bearings rotate together with the simulated drilling pump crankshaft end, friction exists between the rolling bearings and the joint body assembly. This friction causes the joint body assembly to rotate, thus rotating the outer diameter of the pipe joint assembly. The circular runout of the rotary joint can be measured by contacting the outer diameter of the pipe joint assembly with a dial indicator.

[0007] While the crankshaft end of the simulated drilling pump partially rotates relative to the drilling pump frame simulating the crankshaft mounting hole, in order to ensure that the crankshaft end of the simulated drilling pump does not move in the axial direction relative to the drilling pump frame simulating the crankshaft mounting hole, four bolts are used to pass through the four bolt holes of one retaining ring, then through the four bolt holes of the simulated frame, and then through the four bolt holes of the other retaining ring. Then, four nuts are used to connect the two retaining rings to the drilling pump frame simulating the crankshaft mounting hole.

[0008] The fitting clearance between the simulated crankshaft hole and the outer circle of the simulated drilling pump crankshaft end positioning on the simulated frame is 0 to 0.01 mm.

[0009] The perpendicularity between the positioning end face of the simulated drilling pump crankshaft and the positioning inner hole of the simulated drilling pump crankshaft is 0 to 0.01 mm.

[0010] The coaxiality between the inner positioning hole at the end of the simulated drilling pump crankshaft and the outer positioning circle at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm;

[0011] The interference fit between the positioning inner hole at the crankshaft end of the simulated drilling pump and the positioning outer circle of the pipe joint assembly is 0 to 0.04 mm, eliminating the measurement error caused by the clearance between the positioning inner hole at the crankshaft end of the simulated drilling pump and the positioning outer circle of the pipe joint assembly.

[0012] To ensure that the fitting clearance between the simulated crankshaft hole and the positioning outer circle at the end of the simulated drilling pump crankshaft on the local installation of the simulator frame is 0 to 0.01 mm, the technical measure adopted is a fitting method.

[0013] To meet the requirements of 0-0.01mm perpendicularity between the positioning end face and the positioning inner hole of the simulated drilling pump crankshaft end, and 0-0.01mm coaxiality between the positioning inner hole and the positioning outer circle of the simulated drilling pump crankshaft end, a small horizontal lathe can be used. The simulated drilling pump crankshaft end parts can be clamped in one operation, and the positioning inner hole, positioning end face, and positioning outer circle of the simulated drilling pump crankshaft end can be machined simultaneously in one process.

[0014] To facilitate installation and disassembly while maintaining an interference fit of 0–0.04 mm between the inner positioning bore of the drilling pump crankshaft end and the outer positioning circle of the pipe fitting assembly, the adopted technical solution is to ensure that the guide hole accommodates an interference fit length of 0.8–1.2 mm between the inner positioning bore of the simulated drilling pump crankshaft end and the outer positioning circle of the pipe fitting assembly. Due to the very small interference fit length, pressing the outer positioning circle of the pipe fitting assembly into the inner positioning bore of the drilling pump crankshaft end using four bolts is very easy. After inspection, using a wrench to turn the hexagonal bolt head and screw it into the internal threaded hole of the swivel joint, and then using an open-end wrench and a plug, the outer positioning circle of the pipe fitting assembly can be easily pushed out of the inner positioning bore of the simulated drilling pump crankshaft end.

[0015] By adopting the above technical solution, the circular runout of the locating outer circle of the simulated drilling pump crankshaft end relative to the locating inner hole datum and the locating end face datum of the simulated drilling pump crankshaft end can be controlled within mm. Because the fitting clearance between the simulated crankshaft hole and the locating outer circle of the simulated drilling pump crankshaft end in the simulated frame is 0–0.01 mm, the tool measurement error for measuring the outer circle of the pipe fitting assembly relative to the locating outer circle datum and the locating end face datum of the pipe fitting assembly in this embodiment is controlled within 0.10 mm, meeting the requirement of ISO 14253-1, that is, the tool error should be less than 1 / 3 of the tolerance.

[0016] By adopting this embodiment, only a portion of the drilling pump frame simulating the crankshaft hole, a portion simulating the end of the drilling pump crankshaft, and other simple parts and standard components need to be made. The circular runout of the rotary joint itself can be checked at the factory of the rotary joint manufacturer, and the circular runout of the rotary joint can be checked when the rotary joint purchased by the user is inspected at the factory. This way, the overall accuracy of the drilling pump design is not reduced, and the progress of the drilling pump assembly is not affected. Attached Figure Description

[0017] Figure 1 -Exploded view of the rotary joint;

[0018] Figure 2 - Sectional view of the rotary joint assembly;

[0019] Figure 3 -Exploded view of a tool for detecting the circular runout of a rotary joint in the drilling pump field;

[0020] Figure 4 - Assembly diagram of a tool for detecting the circular runout of a rotary joint in the field of drilling pumps;

[0021] Figure 5 - A cross-sectional view of a tool assembly for detecting circular runout of rotary joints in the drilling pump field;

[0022] Figure 6 -A partial schematic diagram of a drilling pump frame simulating the installation of crankshaft bores;

[0023] Figure 7 -A partial schematic diagram of the end of a drilling pump crankshaft simulating the installation of a rotary joint;

[0024] Figure 8 - Schematic diagram of the installation foundation for a tool used to detect the circular runout of a rotary joint in the drilling pump field;

[0025] Figure 9 - Schematic diagram of dial indicator and its base;

[0026] Figure 10 - Schematic diagram of the baffle.

[0027] 1-Tool mounting base, 2-Bolt, 3-Retaining ring, 4-Bolt, 5-Open-end wrench, 6-Partial drilling pump frame simulating crankshaft hole installation, 7-Nut, 8-Partial simulated drilling pump crankshaft end, 9-Plug, 10-Rotary joint, 11-Bolt, 12-Dial indicator and seat, 13-Nut, 1.1-Tool mounting base upper surface, 1.2-T-slot bolt, 3.1-Retaining ring end face, 3.2-Retaining ring bolt through hole, 6.1-Simulated crankshaft hole installed in partial simulated frame, 6.2-Front end face of partial simulated frame, 6.3-Rear end face of partial simulated frame, 6.4-Through hole of bolt in partial simulated frame, 6.5-Pressure step surface of partial simulated frame, 6.6-Through hole of bolt in partial simulated frame, 6.7-Bottom surface of partial simulated frame installation, 8.1- 8.2-Locating inner hole at the end of the simulated drilling pump crankshaft, 8.3-Locating outer circle at the end of the simulated drilling pump crankshaft, 8.4-Internal thread at the end of the simulated drilling pump crankshaft, 8.5-Hexagonal joint for driving the crankshaft end of the simulated drilling pump to rotate, 8.6-Internal threaded hole for ejecting the rotary joint, 8.7-Guide hole, 10.1-Pipe joint assembly, 10.2-Rolling bearing, 10.3-Joint body assembly, 10.1.1-Locating outer circle of the pipe joint assembly, 10.1.2-Locating end face of the pipe joint assembly, 10.1.3-Through hole for mounting clamping bolts of the pipe joint assembly, 10.3.1-Measuring outer circle of the pipe joint assembly, 10.3.2-Internal threaded hole for mounting tubing joints of the pipe joint assembly, 12.1-Dial gauge base, 12.2-Dial gauge contact. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] The embodiments of this utility model are not limited to the following examples. All changes made without departing from the spirit of this utility model are within the protection scope of this utility model.

[0030] Please see Figures 1-10This embodiment describes a tool for detecting the circular runout of a rotary joint in the field of drilling pumps. It includes a tool mounting base 1, bolts 2, retaining rings 3, bolts 4, an open-end wrench 5, a portion of the drilling pump frame simulating the crankshaft hole 6, a nut 7, a portion of the drilling pump crankshaft end 8, a plug 9, a rotary joint 10, bolts 11, a dial indicator and seat 12, a nut 13, a tool mounting base upper surface 1.1, a T-slot bolt 1.2, a retaining ring end face 3.1, a retaining ring bolt through hole 3.2, a portion of the frame simulating the crankshaft hole 6.1, a portion of the frame front end face 6.2, a portion of the frame rear end face 6.3, a portion of the frame bolt through hole 6.4, a portion of the frame clamping step surface 6.5, a portion of the frame clamping bolt through hole 6.6, and a portion of the frame mounting base. Surface 6.7, locating inner hole at the end of the simulated drilling pump crankshaft, locating end face at the end of the simulated drilling pump crankshaft, locating outer circle at the end of the simulated drilling pump crankshaft, internal thread at the end of the simulated drilling pump crankshaft, hexagonal part 8.5 driving the rotation of the end of the simulated drilling pump crankshaft, internal threaded hole of the ejector rotary joint, guide hole, pipe joint assembly, rolling bearing, joint body assembly, locating outer circle of the pipe joint assembly, locating end face of the pipe joint assembly, through hole for mounting clamping bolts of the pipe joint assembly, measuring outer circle of the pipe joint assembly, internal threaded hole for mounting oil pipe joint of the pipe joint assembly, dial indicator seat, dial indicator contact 12.2.

[0031] When testing the circular runout of the rotary joint, the drilling pump frame section 6 simulating the crankshaft bore is fixed. The fixing method involves mounting the bottom surface 6.7 of the simulated frame section on the tool mounting base plane 1.1. Two simulated frame section clamping bolt through holes 6.6 pass through two T-slots with bolts 1.2, and are tightened onto the simulated frame section clamping step surface 6.5 with two nuts 13. The dial indicator contact 12.2 is fixed. The dial indicator and its seat 12 are placed on the tool mounting base plane 1.1, adjusted, and then secured using the magnetism of the dial indicator and its seat 12. The rotary joint 10 is connected to the simulated drilling pump crankshaft end section 8. The connection method involves passing four bolts 11 through four pipe joint assembly clamping bolt through holes 10.1.3 and screwing them into the internal threads 8.4 of the simulated drilling pump crankshaft end. After the rotary joint 10 is connected to the simulated drilling pump crankshaft end portion 8, it rotates simultaneously within the simulated crankshaft hole 6.1 in the simulated frame. The measuring outer diameter 10.3.1 of the pipe joint assembly also rotates. This rotation is achieved by using an open-end wrench 5 to rotate the hexagonal 8.5 that drives the simulated drilling pump crankshaft end. The reason for the rotation of the measuring outer diameter 10.3.1 is that while the pipe joint assembly 10.1 and the rolling bearing 10.2 rotate together with the simulated drilling pump crankshaft end portion 8, there is friction between the rolling bearing 10.2 and the joint body assembly 10.3. This friction causes the joint body assembly 10.3 to rotate, thus causing the measuring outer diameter 10.3.1 of the pipe joint assembly to rotate as well. The circular runout of the rotary joint 10 can be measured by contacting the measuring outer diameter 10.3.1 of the pipe joint assembly with the dial indicator contact 12.2.

[0032] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 To ensure that the simulated drilling pump crankshaft end portion 8 rotates relative to the simulated drilling pump frame portion 6 where the crankshaft hole is installed, and to prevent the simulated drilling pump crankshaft end portion 8 from moving along its axial direction relative to the simulated drilling pump frame portion 6 where the crankshaft hole is installed, four bolts 4 are used. These bolts pass through the four retaining ring bolt through holes 3.2 of one retaining ring 3, then through the four simulated frame bolt through holes 6.4, and then through the four retaining ring bolt through holes 3.2 of the other retaining ring 3. Finally, four nuts 7 are used to connect the two retaining rings 3 to the simulated drilling pump frame portion 6 where the crankshaft hole is installed.

[0033] The fitting clearance between the simulated crankshaft hole 6.1 and the outer circle 8.3 at the end of the simulated drilling pump crankshaft, which are partially installed on the simulated frame, is 0 to 0.01 mm.

[0034] The perpendicularity of the positioning end face 8.2 and the positioning inner hole 8.1 at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm.

[0035] The coaxiality of the inner positioning hole 8.1 at the end of the simulated drilling pump crankshaft and the outer positioning circle 8.3 at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm.

[0036] The interference fit between the inner positioning hole 8.1 at the end of the simulated drilling pump crankshaft and the outer positioning circle 10.1.1 of the pipe fitting assembly is 0 to 0.04 mm, eliminating the measurement error caused by the gap between the inner positioning hole 8.1 at the end of the simulated drilling pump crankshaft and the outer positioning circle 10.1.1 of the pipe fitting assembly.

[0037] To ensure that the fitting clearance between the simulated crankshaft hole 6.1 and the outer circle 8.3 at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm, the technical measure adopted is a fitting method.

[0038] To meet the requirements of 0-0.01mm perpendicularity of the positioning end face 8.2 and the positioning inner hole 8.1 of the simulated drilling pump crankshaft, and 0-0.01mm coaxiality of the positioning inner hole 8.1 and the positioning outer circle 8.3 of the simulated drilling pump crankshaft, a small horizontal lathe can be used to clamp the simulated drilling pump crankshaft end parts in one operation and process the positioning inner hole 8.1, the positioning end face 8.2, and the positioning outer circle 8.3 of the simulated drilling pump crankshaft in one operation.

[0039] To facilitate installation and disassembly while maintaining an interference fit of 0–0.04 mm between the inner positioning hole 8.1 at the end of the drilling pump crankshaft and the outer positioning circle 10.1.1 of the pipe fitting assembly, the adopted technical solution is as follows: the guide hole 8.7 accommodates an interference fit length of 0.8–1.2 mm between the inner positioning hole 8.1 at the end of the drilling pump crankshaft and the outer positioning circle 10.1.1 of the pipe fitting assembly. Due to the very small interference fit length, pressing the outer positioning circle 10.1.1 of the pipe fitting assembly into the inner positioning hole 8.1 at the end of the drilling pump crankshaft using four bolts 11 is very easy. After inspection, using a wrench (not shown), the hexagonal head of bolt 2 is moved and screwed into the inner threaded hole 8.6 of the rotary joint. With the help of an open-end wrench 5 and the plug 9, the outer positioning circle 10.1.1 of the pipe fitting assembly can be easily pushed out of the inner positioning hole 8.1 at the end of the drilling pump crankshaft.

[0040] By adopting the above technical solution, the circular runout of the simulated drilling pump crankshaft end positioning outer circle 8.3 relative to the simulated drilling pump crankshaft end positioning inner hole 8.1 datum and the drilling pump crankshaft end positioning end face 8.2 datum can be satisfied to be 0.02mm. Because the fitting clearance between the simulated crankshaft hole 6.1 and the simulated drilling pump crankshaft end positioning outer circle 8.3 of the simulated frame is 0-0.01mm, the tool measurement error for measuring the outer circle 10.3.1 of the drilling pump pipe fitting assembly relative to the pipe fitting assembly positioning outer circle 10.1.1 datum and the pipe fitting assembly positioning end face 10.1.2 datum, which is 0.10mm, is controlled within 0.03mm, meeting the requirement of ISO 14253-1 that the tool error should be less than 1 / 3 of the tolerance.

[0041] By adopting this embodiment, only a drilling pump frame section 6 simulating the installation crankshaft hole, a drilling pump crankshaft end section 8 simulating the installation crankshaft hole, and other simple parts and standard components need to be made. The circular runout of the rotary joint itself can be checked at the rotary joint manufacturing unit before leaving the factory, and the circular runout of the rotary joint can be checked at the incoming inspection of the rotary joint purchased by the user unit. This will not reduce the overall accuracy of the drilling pump design, nor will it affect the progress of the drilling pump assembly.

[0042] The implementation of this utility model has been described in detail, but this utility model is not limited to the above embodiments. Various changes can be made within the knowledge scope of those skilled in the art, and these changes are all protected by this utility model and are also within the protection scope of this utility model.

Claims

1. A tool for detecting the circular runout of a rotary joint in a drilling pump, comprising: a portion of the drilling pump frame simulating the crankshaft bore (6), a portion of the drilling pump crankshaft end simulating the crankshaft, a rotary joint (10), a portion of the frame simulating the crankshaft bore (6.1), a locating inner hole at the crankshaft end simulating the crankshaft, a locating end face at the crankshaft end simulating the crankshaft, a locating outer circle at the crankshaft end simulating the crankshaft, a guide hole (8.7), a pipe joint assembly (10.1), a rolling bearing (10.2), a joint body assembly (10.3), and a locating outer circle of the pipe joint assembly (...). 10.1.1), 10.1.2 - Pipe fitting assembly positioning end face, pipe fitting assembly measuring outer diameter (10.3.1), dial indicator contact (12.2); its characteristics are: When testing the circular runout of the rotary joint, the drilling pump frame section (6) simulating the crankshaft hole is fixed, the dial indicator contact (12.2) is fixed, the rotary joint (10) and the simulated drilling pump crankshaft end section (8) are connected together, and the simulated crankshaft hole (6.1) is installed in the simulated frame section and rotates. The outer circle (10.3.1) of the pipe joint assembly will also rotate. The circular runout of the rotary joint (10) can be measured by contacting the outer circle (10.3.1) of the pipe joint assembly with the dial indicator contact (12.2). The fitting clearance between the simulated crankshaft hole (6.1) and the positioning outer circle (8.3) at the end of the simulated drilling pump crankshaft on the simulated frame is 0 to 0.01 mm. The perpendicularity of the positioning end face (8.2) at the end of the simulated drilling pump crankshaft and the positioning inner hole (8.1) at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm. The coaxiality of the inner positioning hole (8.1) at the end of the simulated drilling pump crankshaft and the outer positioning circle (8.3) at the end of the simulated drilling pump crankshaft is 0 to 0.01 mm. The simulated drilling pump crankshaft end positioning inner hole (8.1) and the pipe joint assembly positioning outer circle ( The interference fit of 10.1.1) is 0–0.04 mm; The guide hole (8.7) satisfies the positioning inner hole (8.1) at the end of the simulated drilling pump crankshaft and the positioning outer circle of the pipe fitting assembly. The interference fit length of 10.1.1) is 0.8 to 1.2 mm.

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