CN202768756U - Guide rod mechanism switchover-free type mechanical reversing apparatus - Google Patents

Abstract

A guide rod mechanism switchover-free type mechanical reversing apparatus is disclosed and is a guide rod mechanism consisting of a large gear wheel, a large gear wheel shaft, a crank, a slide block, a guide rod, an input shaft, an output shaft, a small gear wheel, and a machine frame. The guide rod mechanism switchover-free type mechanical reversing apparatus is characterized in that a cylindrical guide rod is welded on a root circle part of the large gear wheel and the large gear wheel shaft, the input shaft which is placed between the large gear wheel shaft and a small gear wheel shaft is mounted on the machine frame through bearings, an end of the input shaft is connected with a speed reducer, the crank is fixed to the other end of the input shaft, the crank and the slide block on the guide rod form a revolute pair, and the slide block and the guide rod form a moving pair; and when power is input, the input shaft moves in a circle following the speed reducer in the same direction with the speed reducer, the slide block is driven by the crank to move in a circle, the slide block moves on the guide rod, therefore the guide rod is driven by the slide block to swing back and forth in a reciprocating way, the large gear wheel is driven by the guide rod to swing back and forth in a reciprocating way, the large gear wheel engages with the small gear wheel, the length ratio of the crank to the guide rod is 1 : (2.5-3.0), and the transmission ratio of the large gear wheel to the small gear wheel is 1/6-1/7. The beneficial effects of the guide rod mechanism switchover-free type mechanical reversing apparatus are that the guide rod mechanism is applied to the switchover-free type reversing apparatus, the size of the reversing apparatus in an oil pumping machine is reduced, quick-return characteristics are realized, and stability is improved.

Description

Guide rod mechanism without switching mechanical reversing device

Technical field:

The utility model relates to the field of petroleum equipment, in particular to a non-switching mechanical reversing device of a guide rod mechanism, which is suitable for long-stroke pumping units. the

Background technique:

In the oilfield development project of the petroleum industry, as the development of the oilfield enters the middle and later stages, in order to maintain the stable and high production of the oilfield, it is necessary to have sufficient liquid production (large pump extraction); on the other hand, for the development of low-permeability , Low-grade oil reservoirs require deep pumping with a small displacement (deep pumping with a small pump) to keep the oil layer produced under a large pressure difference. In addition, the number of heavy oil wells and multi-gas wells is also increasing. These objective factors require us to accelerate the development of long-stroke pumping units. At present, the reversing device of the long-stroke pumping machine used in the oilfield has the disadvantages of large volume and low reliability. Therefore, one of the main problems faced by the promotion and development of the long-stroke pumping unit required for oilfield development in my country is that There is a lack of a reliable reversing mechanism suitable for my country's national conditions. the

Invention content:

In order to improve the reliability of the mechanical reversing device, reduce the size of the reversing device, realize the advantages of quick return characteristics, etc., the utility model proposes a guide rod mechanism without switching reversing device to solve the existing problem of mechanical reversing The disadvantage of the device is that the reversing device not only reduces the volume of the existing mechanical reversing device, but also improves the stability of the existing mechanical reversing device and realizes the snap-back characteristic. the

The device uses the guide rod mechanism and the gear mechanism to convert the continuous rotation of the input shaft into the positive and negative reciprocating swings of the large gear. The guide rod mechanism has no switchable mechanical reversing device. , slide block, guide rod, input shaft, output shaft, pinion gear and the guide rod mechanism composed of frame, its characteristic is: a cylindrical guide rod is welded on the dedendum circle position of the bull gear and the bull gear shaft, and the input The shaft is located between the large gear shaft and the pinion shaft and is installed on the frame through bearings. One end of the input shaft is connected to the reducer, and the other end is fixed to the crank. The crank and the slider on the guide rod form a rotating pair. The slider and the guide rod Form a moving pair; when the power is input, the input shaft moves in the same direction as the reducer, the crank drives the slider to make a circular motion, the slider moves on the guide rod, drives the guide rod to swing forward and backward, and the guide rod drives The bull gear swings forward and backward, the bull gear meshes with the pinion, the length ratio of the crank to the guide rod is 1: (2.5 to 3.0), and the transmission ratio of the bull gear to the pinion is 1/6 to 1/7. the

The solution adopted by the utility model to solve its technical problem is: weld a cylindrical guide rod on the dedendum circle position of the large gear and the large gear shaft, and the input shaft is located between the large gear shaft and the pinion shaft and installed through the bearing On the frame, one end of the input shaft is connected to the reducer, and the other end is fixed to the crank. The crank and the slider on the guide rod form a rotating pair, and the slider and the guide rod form a moving pair. When power is input, the input shaft moves with the reducer. Circular motion in the same direction, the crank drives the slider to make a circular motion, the slider moves on the guide rod, drives the guide rod to swing forward and backward, the guide rod drives the large gear to swing forward and backward, and the large gear meshes with the small gear . the

The beneficial effect of the utility model is that the application of the guide rod mechanism to the non-switching reversing device can reduce the volume of the reversing device in the pumping unit, realize the quick return characteristic, and improve the stability. the

Description of drawings:

Fig. 1 is the front view of the non-switching mechanical reversing device of the guide rod mechanism of the present invention. the

Fig. 2 is an A-A sectional view of the non-switchable mechanical reversing device of the guide rod mechanism of the present invention. the

In the figure, 1. large gear, 2. large gear shaft, 3. crank, 4. slider, 5. guide rod, 6. input shaft, 7. output shaft, 8. pinion, 9. frame. the

Detailed ways:

In Fig. 1, on the non-switching mechanical reversing device of the guide rod mechanism, a cylindrical guide rod (5) is welded near the dedendum circle of the bull gear (1) and on the gear shaft (2), and the input shaft (6) Located between the large gear shaft (2) and the output shaft (7) and mounted on the frame (9) through bearings, one end of the input shaft (6) is connected to the reducer, and the other end is fixed to the crank (3), The slide block (4) on the crank (3) and the guide rod (5) forms a revolving pair, and the slide block (4) and the guide rod (5) form a moving pair. When the power is input, the input shaft (6) makes a circular motion in the same direction with the reducer, the crank (3) drives the slider (4) to make a circular motion, the slider moves on the guide rod (5), and drives the guide rod (5) ) to swing forward and backward, the guide rod (5) drives the bull gear (1) to swing forward and backward, and the bull gear (1) meshes with the pinion (8) to realize the reversing process of the pinion (8). the

After optimized design, the length ratio of the crank (3) to the guide rod (5) is 1: (2.5-3.0), and the transmission ratio of the large gear (1) to the pinion (8) is 1/6-1/7. The input shaft (6) is placed between the bull gear shaft (2) and the output shaft (7), so this device can reduce the volume of the mechanical reversing device. The utility model can reduce the energy consumption and volume of the pumping unit after being applied to the long-stroke pumping unit. the

Claims (1)

1. a guide-bar mechanism is without the switching type mechanical commutation device, it is the guide-bar mechanism that is made of gearwheel, Large Gear Shaft During, crank, slide block, guide rod, input shaft, output shaft, small gear and frame, it is characterized in that: at root circle position and cylindricality guide rod of Large Gear Shaft During welding of gearwheel, input shaft is installed on the frame between Large Gear Shaft During and pinion shaft and by bearing, one end connection reducer of input shaft, the other end fixed crank, slide block on crank and the guide rod forms revolute pair, and slide block and guide rod form sliding pair; When power is inputted, input shaft is done unidirectional circular movement with retarder, crank band movable slider moves in a circle, slide block is mobile at guide rod, drive guide rod and do positive and negative reciprocally swinging, guide rod drives gearwheel and does positive and negative reciprocally swinging, gearwheel and pinion, the length ratio of crank and guide rod is 1: (2.5～3.0), the velocity ratio of gearwheel and small gear are 1/6～1/7.

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