CN204402870U - One waits wall thickness single screw type oil-gas mixed delivery pump - Google Patents

Abstract

The utility model discloses an equal-wall-thickness single-screw type oil-gas mixed delivery pump, which mainly consists of a discharge end, a motor casing, an equal-wall-thickness bushing, a tapered screw, a flexible shaft, a suction end, a sealing device, a centralizing ring, a transmission Composed of shafts and couplings. The left end of the motor housing is connected to the discharge end, and the right end is connected to the suction end. The conical screw is hollow, with a flexible shaft inside, and a sealing device is provided on the outside of the transmission shaft. connected, the said centralizing ring is placed in the inner hole of the sealing device. The beneficial effects of the utility model: the screw bush pair is of equal wall thickness, the thermal expansion of the rubber bushes is the same at all places when the motor is working underground, the rubber bushes wear evenly when the frictional force heats up, the mechanical efficiency of the motor is high, and it is also It slows down the aging and fatigue damage of the rubber bushing, prolongs the service life of the single-screw oil-gas mixed pump, and has a reasonable structure, which is convenient for disassembly and maintenance.

Description

A single-screw oil-gas mixed delivery pump with equal wall thickness

technical field

The utility model relates to a mixed transport pump, in particular to a single-screw oil-gas mixed transport pump.

Background technique

In order to popularize the oil-gas sealed gathering and transportation system with economic benefits in the oil field, and reduce the back pressure of the wellhead to increase the crude oil production, it is necessary to create a special pump that can pressurize and transport the oil-gas mixture. The role of the oil and gas mixed transportation pump is to realize the centralized purification, separation and storage of crude oil during the process of gathering and transporting crude oil containing gas, water, sand, etc. In addition, it can also reduce wellhead pressure and increase single well or regional production. The single-screw oil-gas mixed delivery pump can meet the above requirements, and can transport pure liquid and pure gas in a short time, and solid particles can account for about 5% of the liquid volume.

At present, most of the common single-screw oil-gas mixed pump screw bushings have unequal wall thickness, and the thickness of the rubber bushing is uneven. If the thermal expansion is large, the interference between the rotor and the rubber bushing will become larger, and the friction force will further increase, resulting in greater frictional heat generation of the rubber bushing. This vicious cycle not only reduces the mechanical efficiency of the motor, but also intensifies The speed of aging and fatigue damage of the rubber bushing is reduced, and the service life of the single-screw oil-gas mixed pump is shortened.

Contents of the invention

The purpose of the utility model is to propose a single-screw oil-gas mixed pump with reasonable structure and high efficiency for the existing single-screw oil-gas mixed pump with low efficiency and serious bush wear.

Its technical solution is: a single-screw oil-gas mixed pump with equal wall thickness, which mainly consists of a discharge end, a motor casing, a bush with equal wall thickness, a conical screw, a flexible shaft, a suction end, a sealing device, a centralizing ring, a transmission Composed of shafts and couplings. The left end of the motor housing is connected to the discharge end, and the right end is connected to the suction end. The conical screw is hollow, with a flexible shaft inside, and a sealing device is provided on the outside of the transmission shaft. connected, the said centralizing ring is placed in the inner hole of the sealing device.

The tapered screw is provided with two stepped holes, in which the flexible shaft is placed in the large hole and the flexible shaft is positioned axially in the small hole.

The bushing with equal wall thickness is vulcanized and fixed on the motor casing.

The beneficial effects of the utility model: the screw bush pair is of equal wall thickness, the thermal expansion of the rubber bushes is the same at all places when the motor is working underground, the rubber bushes wear evenly when the frictional force heats up, the mechanical efficiency of the motor is high, and it is also It reduces the aging and fatigue damage speed of the rubber bushing, prolongs the service life of the single-screw oil-gas mixed pump, and has a reasonable structure, which is convenient for disassembly and maintenance.

Description of drawings

Fig. 1: structural representation of the utility model;

In the above picture: 1. Discharge end, 2. Motor housing, 3. Equal wall thickness bushing, 4. Conical screw, 5. Flexible shaft, 6. Suction end, 7. Sealing device, 8. Centralizing ring, 9 . Transmission shaft, 10. Coupling.

Detailed ways

Below in conjunction with accompanying drawing and example the utility model is described further:

As shown in Figure 1, the utility model is an equal-wall-thickness single-screw oil-gas mixed transport pump, which is mainly composed of a discharge end 1, a motor casing 2, an equal-wall-thickness bushing 3, a conical screw 4, a flexible shaft 5, and a suction pump. End 6, sealing device 7, centralizing ring 8, drive shaft 9, coupling 10. The left end of the motor housing 2 is connected to the discharge end 1, and the right end is connected to the suction end 6. The conical screw 4 is a hollow structure with a flexible shaft 5 inside, and a sealing device is provided on the outside of the transmission shaft 9. 7. The lower end is connected with the coupling 10, and the centralizing ring 8 is placed in the inner hole of the sealing device 7.

The tapered screw 4 is provided with two stepped holes, wherein the flexible shaft 5 is placed in the large hole and the flexible shaft 5 is positioned axially in the small hole.

The bushing 3 with constant wall thickness is vulcanized and fixed on the motor casing 2 .

The movement of the tapered screw 4 of the equal-wall-thickness single-screw oil-gas mixed delivery pump is fixed-point movement, and the fixed point is located on the extension line of the pump centerline. The conical screw 4 is driven by the motor and transmission shaft 9 through the flexible shaft 5, and the lateral deformation of the flexible shaft 5 is used to meet the fixed-point movement requirements of the conical screw 4. The outer helical surface of the conical screw 4 and the inner helical surface of the bushing 3 with equal wall thickness form a series of sealed chambers. With the rotation of the conical screw 4, the above-mentioned sealed chamber is pushed to the discharge end 1 with a spiral motion, and at the same time, the volume of the sealed chamber gradually decreases, so that the oil-gas mixture is compressed and discharged. At the same time as the sealed chamber moves, the suction end 6 forms a new sealed chamber, so that the oil-air mixture can be continuously pressurized and delivered.

The utility model has been described above with examples, but the utility model is not limited to the above-mentioned specific embodiments, and any changes or modifications made based on the utility model all belong to the protection scope of the utility model.

Claims (3)

1. An equal-wall-thickness single-screw oil-gas mixed transport pump, characterized in that: it mainly consists of a discharge end (1), a motor housing (2), an equal-wall-thickness bushing (3), a conical screw (4), Flexible shaft (5), suction end (6), sealing device (7), centralizing ring (8), transmission shaft (9), coupling (10), the left end of the motor casing (2) is connected to the discharge end (1), the right end is connected to the suction end (6), the conical screw (4) is a hollow structure with a flexible shaft (5) inside, and a sealing device is provided on the outside of the drive shaft (9) (7), the lower end is connected with the coupling (10), and the centralizing ring (8) is placed in the inner hole of the sealing device (7). 2. The equal-wall-thickness single-screw oil-gas mixed transport pump according to claim 1, characterized in that: the tapered screw (4) is provided with two stepped holes, wherein the flexible shaft ( 5), the small hole axially locates the flexible shaft (5). 3. A constant-wall-thickness single-screw oil-gas mixed transport pump according to claim 1, characterized in that: said constant-wall-thickness bushing (3) is vulcanized and fixed on the motor casing (2) .