Brake shoe shaft of oil pumping unit

Abstract

A brake shoe shaft of an oil pumping unit belongs to the brake technology of the oil pumping unit in an oil field, overcomes the defects of the prior art, and comprises a shaft main body, a locking nut, a lubricating oil groove, an oil outlet hole, an oil filling hole, a spring gasket, an adjusting square head, an internal thread interface, a grease nipple and a brake hub shaft positioning nut, the other end of the shaft main body is provided with an adjusting square head, and the middle is provided with a brake hub shaft positioning nut; the shaft body and the adjusting square head are of an integrated structure, and a spring gasket is sleeved on the shaft body on the inner side of the adjusting square head.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield pumping unit brake technology especially a pumping unit brake shoe axle. BACKGROUND

[0002] Whether the walking beam type pumping unit brake is flexible and good to use plays a very important role in the safe operation of the pumping unit. In the production site, due to the corrosion of the pumping unit by rainwater and other external environments all the year round, the brake shoe axle and the brake hub shaft hole often appear dead phenomenon, resulting in that the brake pad is not flexible to open and close, and the brake hub is rubbed, which will cause the pumping unit brake pad to wear out, and the phenomenon of sticking and coasting often occurs during operation. These problems have long plagued the normal operation of the pumping unit. So far, there is no new technology to solve such problems. The walking beam type pumping unit generally uses an outer holding type brake, and the brake assembly usually includes a brake shoe axle, i.e. a brake shoe axle, which is screw assembled on a reduction box, and two holding rings which are movably sleeved on the brake shoe axle. The two holding rings can move towards each other to hold the brake wheel tightly to complete the brake action. The end of the brake shoe axle away from the reduction box is provided with a stop end, and a shaft sleeve is sleeved on the brake shoe axle, and the two ends of the shaft sleeve are respectively topped on the holding ring and the reduction box, and the two holding rings realize axial stop positioning through the shaft sleeve and the stop end.

[0003] The application scene of the old brake shoe axle technology: mainly applied to the walking beam type pumping unit of land oil exploitation. When the pumping unit is installed, debugged and repaired, the brake device where the brake shoe axle is located plays an important role in ensuring the safety of operation, facilitating installation and debugging, etc.

[0004] Disadvantages of the old brake shoe axle:

[0005] Complex lubrication and maintenance: the brake shoe axle needs to be disassembled for applying lubricating oil, which increases the maintenance workload and difficulty, consumes time and manpower, and also brings unsafe risks to construction personnel.

[0006] Poor universality: due to the variety of pumping unit reduction boxes, the distance between the brake wheel and the reduction box and the width of the brake wheel have multiple specifications, but the brake assembly usually has only one technical standard, and the old brake shoe axle and the shaft sleeve matched therewith are of fixed size. When installed on different types of reduction boxes, problems such as the short distance of the threaded section of the brake shoe axle screw assembled on the reduction box, the shaft sleeve unable to realize positioning of the holding ring, etc. may occur, resulting in sinking of the overhanging end of the brake shoe axle, wear of the brake pad by the holding ring, short service life of the brake, etc.

[0007] Rust easily affects braking: the walking beam type pumping unit is operated in the field for a long time, and is affected by environmental factors. The brake shoe axle often rusts due to the gap, which further affects the braking effect and brings great influence on equipment inspection and maintenance. SUMMARY

[0008] The purpose of this utility model is to provide a simple, wear-resistant, and reliable brake shoe shaft for an oil pumping unit, which overcomes the shortcomings of the original technology. This utility model achieves its purpose by comprising a shaft body, a locking nut, a lubricating oil groove, an oil outlet, an oil filling hole, a spring washer, an adjusting square head, an internal threaded interface, a grease fitting, and a brake hub shaft positioning nut. The key feature is that: one end of the shaft body has a locking nut, the other end has an adjusting square head, and a brake hub shaft positioning nut is located in the middle; the shaft body and the adjusting square head are an integral structure, and a spring washer is fitted onto the inner side of the shaft body of the adjusting square head.

[0009] The shaft body has an annular lubricating oil groove at the middle end, and a longitudinal oil outlet hole inside the annular lubricating oil groove. The oil outlet hole is a through hole, and the diameter of the oil outlet hole is the same as the width of the annular lubricating oil groove.

[0010] An oil injection hole is provided at the center of one end of the shaft body, and the oil injection hole is concentric with the shaft body; one end of the oil injection hole passes through the oil outlet hole and is located inside the brake hub shaft positioning nut; the other end of the oil injection hole is located at the center of the adjusting square head, and the end of the oil injection hole is connected to a grease nipple, which is fastened to the oil injection hole by an internal thread interface.

[0011] The brake hub shaft positioning nut is arranged longitudinally and has the same diameter as the locking nut.

[0012] The application method of this utility model is as follows: First, insert the spring washer into the shaft body; insert the brake hub shaft into the shaft body; tighten the brake hub shaft positioning nut; then tighten the lock nut; then align the brake hole position with the pump reducer body and install it, tightening the lock nut after reaching the appropriate position; then adjust the brake hub shaft positioning nut into place; second, add an appropriate amount of grease to the grease fitting with a grease gun; third, adjust the entire braking system until it is flexible and easy to use.

[0013] The significance of this utility model: This device has a simple structure and is easy to operate; it solves the lubrication problem between the brake shoe shaft and the brake pad shaft and the positioning adjustment problem of the brake hub shaft, and eliminates the problems of rust and seizing of the brake shoe shaft and brake pad shaft holes, resulting in jamming, slippage, and brake positioning adjustment; it ensures the normal operation of the oil pumping unit, reduces workload, and improves production efficiency and safety factor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pumping unit brake shoe shaft. In the diagram, 1. Shaft body, 2. Locking nut, 3. Lubricating oil groove, 4. Oil outlet hole, 5. Oil injection hole, 6. Spring washer, 7. Adjusting square head, 8. Internal thread interface, 9. Grease nipple, and 10. Brake shoe shaft positioning nut. Detailed Implementation

[0015] The utility model discloses a shaft body 1, locking nut 2, lubricating oil groove 3, oil hole 4, oil hole 5, spring washer 6, adjusting square head 7, internal thread interface 8, grease nipple 9, brake hub shaft locating nut 10, its characterized in that: one end of the shaft body 1 has locking nut 2, and the other end of the shaft body 1 has adjusting square head 7, and there is brake hub shaft locating nut 10 in the middle: the shaft body 1 and adjusting square head 7 are integral structure, and spring washer 6 is sleeved on the inside shaft body 1 of adjusting square head 7.

[0016] Embodiment 2, the middle end of the shaft body 1 is provided with annular lubricating oil groove 3, and there is longitudinal oil hole 4 in the annular lubricating oil groove 3, the oil hole 4 is through hole, and the hole diameter of the oil hole 4 is consistent with the width of the annular lubricating oil groove 3.

[0017] Embodiment 3, the one end center of the shaft body 1 is provided with oil hole 5, and oil hole 5 is concentric with the shaft body 1; one end of the oil hole 5 passes through the oil hole 4 and is located in the brake hub shaft locating nut 10; the other end of the oil hole 5 is located in the center of the adjusting square head 7, and the end of the oil hole 5 is connected with the grease nipple 9, and the grease nipple 9 is fastened with the oil hole 5 by internal thread interface 8.

[0018] Embodiment 4, the brake hub shaft locating nut 10 is arranged longitudinally, and is consistent with the diameter of locking nut 2.

Claims

1. A brake shoe shaft for an oil pump, comprising a shaft body (1), a locking nut (2), a lubricating oil groove (3), an oil outlet (4), an oil filling hole (5), a spring washer (6), an adjusting square head (7), an internal threaded interface (8), a grease nipple (9), and a brake hub shaft positioning nut (10), characterized in that: One end of the shaft body (1) has a locking nut (2), the other end of the shaft body (1) has an adjusting square head (7), and the middle has a brake hub shaft positioning nut (10); the shaft body (1) and the adjusting square head (7) are an integral structure, the inside of the adjusting square head (7) is sleeved with a spring washer (6) on the shaft body (1); the middle end of the shaft body (1) is provided with an annular lubricating oil groove (3), and a longitudinal oil outlet hole (4) is arranged in the annular lubricating oil groove (3); the oil outlet hole (4) is a through hole, and the hole diameter of the oil outlet hole (4) is consistent with the width of the annular lubricating oil groove (3).

2. The pumping unit brake shoe axle of claim 1, wherein: One end of the shaft body (1) is provided with an oil injection hole (5), and the oil injection hole (5) is concentric with the shaft body (1); one end of the oil injection hole (5) penetrates through the oil outlet hole (4) and is located in the brake hub shaft positioning nut (10); the other end of the oil injection hole (5) is located in the center of the adjusting square head (7), and the end of the oil injection hole (5) is connected with a grease nipple (9), and the grease nipple (9) and the oil injection hole (5) are fastened by an internal thread interface (8).

3. The pumping unit brake shoe axle of claim 1, wherein: The brake hub shaft positioning nut (10) is arranged longitudinally and has the same diameter as the locking nut (2).

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