Water injection pump pry based on planetary gear reducer

Abstract

The water injection pump pry comprises a base, a plunger pump is connected to the front portion of the top surface of the base through bolts, the planetary gear reducer is arranged on one side of the plunger pump, the output end of the planetary gear reducer is connected with the plunger pump, and the input end of the planetary gear reducer is connected with a universal shaft; the end, away from the planetary gear reducer, of the universal shaft is sequentially connected with a connecting disc and an alternating-current variable-frequency motor. The alternating-current variable-frequency motor is fixed to the base through bolts. The water injection pump pry based on the planetary gear reducer provides guarantee for high efficiency, energy conservation, high reliability, individuation and integration of the water injection pump.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum and natural gas production equipment, and in particular relates to a water injection pump skid based on a planetary gear reducer. Background Art

[0002] In the process of oilfield exploitation, in order to maintain the formation pressure and achieve stable and increased production of the oilfield, water injection is used to maintain the pressure. The water injection pump skid is the core equipment of the oilfield water injection system. The reliability and stability of the whole machine are the key to the water injection operation, and also the basis for the oilfield to build an unmanned, efficient and energy-saving online monitoring integrated operation water injection station.

[0003] At present, the commonly used water injection pump skid is powered by an AC variable frequency motor, and drives a horizontal single-acting plunger pump through a belt drive or a gear reducer. Its operating condition is 24 hours of continuous operation. The continuous operation pump stroke is as high as (220-260) r / min, and the pump plunger speed is about 1.5m / s, which is about 1.25 times that of a conventional horizontal pump. High pump stroke and high plunger speed are the main factors affecting the pump suction performance and the life of wearing parts. The transmission mode of the belt or gear reducer limits the reduction of pump stroke, and the transmission efficiency is limited. Therefore, the existing water injection pump skids generally have the problems of high energy consumption, short life of wearing parts, frequent operation and maintenance, and high maintenance costs.

[0004] Therefore, there is an urgent need for a water injection pump skid with a planetary gear reducer that is high in efficiency, low in pump stroke, high in reliability and easy to integrate. Summary of the invention

[0005] The purpose of the present invention is to provide a water injection pump skid based on a planetary gear reducer, which solves the technical problem in the prior art that the plunger pump structure driven by a belt or a gear reducer is limited in reducing the pump stroke.

[0006] The technical solution adopted by the present invention is a water injection pump skid based on a planetary gear reducer, comprising a base, a plunger pump being connected to the front of the top surface of the base by bolts, a planetary gear reducer being arranged on one side of the plunger pump, the output end of the planetary gear reducer being connected to the plunger pump, the input end of the planetary gear reducer being connected to a universal joint, the end of the universal joint away from the planetary gear reducer being connected in sequence to a connecting disk and an AC variable frequency motor, and the AC variable frequency motor being fixed to the base by bolts.

[0007] The present invention is also characterized in that the plunger pump comprises a pump body, the pump body is connected to a crankshaft, the crankshaft is connected to a spline flange via bolts, and the spline flange is connected to the output end of the planetary gear reducer.

[0008] The planetary gear reducer comprises a first-stage parallel gear, the first-stage parallel gear is connected to a planetary gear, the input end of the first-stage parallel gear is connected to a power input flange, the power input flange is connected to a universal shaft, the planetary gear is connected to a fixed flange, and the planetary gear is also provided with a drum-shaped tooth connected to a spline flange;

[0009] A universal shaft protection cover is provided at the rotating part of the universal shaft, and the universal shaft protection cover is fixed to the base by bolts;

[0010] A reducer support frame is provided at the bottom end of the planetary gear reducer, and the reducer support frame is fixed to the base by bolts;

[0011] A plunger pump frame is also provided on the top of the base, and a fixing flange is fixed to the top of the plunger pump frame by bolts;

[0012] The power output end of the AC variable frequency motor is provided with a shaft head and a square key, a key slot is provided on the connecting plate, and the square key and the key slot are clearance-matched.

[0013] The beneficial effects of the present invention are as follows: the present invention is based on a water injection pump skid with a planetary gear reducer, breaks through the design concept of a conventional belt or gear reducer driven plunger pump structure, and adopts a reducer composed of a planetary gear and a first-stage parallel gear to drive the plunger pump, so that the water injection pump skid has the advantages of a large transmission ratio, high reliability, high transmission efficiency, smooth operation and low noise, while significantly reducing pump stroke and increasing torque, the transmission efficiency is high, the pump skid structure is compact, and it is adaptable to various installation methods.

[0014] The water injection pump skid based on the planetary gear reducer of the present invention provides guarantees for high efficiency, energy saving, high reliability, personalization and integrated integration of the water injection pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the water injection pump skid based on the planetary gear reducer of the present invention;

[0016] Figure 2 It is a top view of the water injection pump skid based on the planetary gear reducer of the present invention;

[0017] Figure 3 This is a front view of the planetary gear reducer in the water injection pump skid of the present invention;

[0018] Figure 4 It is a top view of the planetary gear reducer in the water injection pump skid of the present invention;

[0019] Figure 5 It is a structural schematic diagram of a spline flange in a water injection pump skid of the present invention;

[0020] Figure 6 It is a structural schematic diagram of a connection plate in a water injection pump skid of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the AC variable frequency motor in the water injection pump skid of the present invention;

[0022] Figure 8 It is a structural schematic diagram of a universal shaft protection cover in a water injection pump skid of the present invention;

[0023] In the figure, 1. base, 2. plunger pump, 201. pump body, 202. crankshaft, 203. spline flange, 3. planetary gear reducer, 301. primary parallel gear, 302. planetary gear, 303. power input flange, 304. fixing flange, 305. drum gear, 4. universal shaft, 5. connecting plate, 501. keyway, 6. AC variable frequency motor, 601. shaft head, 602. square key, 7. universal shaft protection cover, 8. reducer support frame, 9. plunger pump frame. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 As shown, the present invention provides a water injection pump skid based on a planetary gear reducer, including a base 1, a plunger pump 2 is connected to the front of the top surface of the base 1 by bolts, and the plunger pump 2 includes a pump body 201, and the pump body 201 is connected to a crankshaft 202, as shown in FIG. Figure 5 As shown, the crankshaft 202 is connected to the spline flange 203 by bolts, and the spline flange 203 is connected to the output end of the planetary gear reducer 3. The AC variable frequency motor 6 installed and fixed by the planetary gear reducer 3 is input to the crankshaft 202 to realize the power input of the water injection pump skid.

[0026] like Figure 3 , Figure 4 As shown, a planetary gear reducer 3 is provided on one side of the plunger pump 2. Compared with the conventional water injection pump skid driven by a belt or a gear reducer, the planetary gear reducer 3 is used to further increase the transmission ratio, reduce the pump stroke, improve the transmission efficiency, make the overall structure of the pump skid compact, increase the running stability, and be personalized and suitable for various installation methods; the planetary gear reducer 3 includes a primary parallel gear 301, the primary parallel gear 301 is connected to a planetary gear 302, the input end of the primary parallel gear 301 is connected to a power input flange 303, the power input flange 303 is bolted to the flange at one end of the universal shaft 4, the planetary gear 302 is connected to a fixed flange 304, and the planetary gear 302 is also provided with a drum-shaped tooth 305 connected to the spline flange 203. That is, the input end of the planetary gear reducer 3 is connected to the universal shaft 4, and the output end of the planetary gear reducer 3 is connected to the plunger pump 2. A reducer support frame 8 is provided at the bottom end of the planetary gear reducer 3, and the reducer support frame 8 is fixed to the base 1 by bolts.

[0027] The center distance between the power input flange 303 and the crankshaft 202, the radial relative position of the power input flange 303 around the center of the crankshaft 202, and the relative position of the power input flange 303 and the drum gear 305 at the power output end on the same side or different sides can be adjusted according to the needs of the water injection skid, and can be personalized as an integrated design for the water injection pump; the planetary gear 302 is provided with a drum gear 305 connected to the spline flange 203, and the internal spline connection structure of the spline flange 203 and the drum gear 305 further reduces the axial dimension when the planetary gear reducer 3 is connected to the plunger pump 2, avoiding the problem of increased overall thickness of the gear reducer caused by the output flange connection; the combined structure of the planetary gear 302 and the primary parallel gear 301 can greatly increase the reduction ratio design range of the planetary gear reducer 3, reduce the power speed and increase the torque of the AC variable frequency motor 6, and provide a guarantee for high efficiency, energy saving and high reliability of the water injection pump skid.

[0028] A plunger pump frame 9 is also provided on the top of the base 1 , and a fixing flange 304 is fixed on the top of the plunger pump frame 9 by bolts.

[0029] like Figure 6 , Figure 7 , Figure 8 As shown, the rotating part of the universal shaft 4 is provided with a universal shaft protection cover 7, and the universal shaft protection cover 7 is fixed to the base 1 by bolts. The end of the universal shaft 4 away from the planetary gear reducer 3 is connected to the connecting plate 5 and the AC variable frequency motor 6 in sequence, so that the power of the AC variable frequency motor 6 is input to the planetary gear reducer 3.

[0030] The AC variable frequency motor 6 is fixed to the base 1 by bolts. The power output end of the AC variable frequency motor 6 is provided with a shaft head 601 and a square key 602. A key slot 501 is provided on the connecting disk 5. The square key 602 and the key slot 501 are clearance-matched. The connecting disk 5 is installed on the AC variable frequency motor 6 through the square key 602 and the key slot 501.

[0031] The installation steps of the present invention are:

[0032] 1) Installation of the plunger pump 2: The pump body 201 is fixed on the base 1 by bolts, and the spline flange 203 is installed on the power input end of the crankshaft 202 of the plunger pump 2 by bolts;

[0033] 2) Installation of the planetary gear reducer 3: The drum gear 305 at the power output end of the planetary gear reducer 3 is installed on the spline flange 203, and then fixed on the plunger pump frame 9 by bolts outside the planetary gear reducer 3;

[0034] 3) Installation of the AC variable frequency motor 6: The AC variable frequency motor 6 is fixed on the base 1 by bolts; a shaft head 601 and a square key 602 are provided at the power output end of the AC variable frequency motor 6, and the square key 602 cooperates with the key slot 501 to complete the installation of the connecting plate 5 on the AC variable frequency motor 6;

[0035] 4) Installation of the universal joint 4: The flange at one end of the universal joint 4 is connected to the power input flange 303 by bolts; the flange at the opposite end of the universal joint 4 is connected to the connecting plate 5 by bolts to complete the connection between the AC variable frequency motor 6 and the planetary gear reducer 3.

[0036] 5) Fixing the reducer support 8: The reducer support 8 is installed at a suitable position of the base 1 by bolts; and the installation of the water injection pump skid based on the planetary gear reducer is completed.

[0037] Example 1

[0038] The present embodiment provides a water injection pump skid based on a planetary gear reducer, comprising a base 1, a plunger pump 2 is connected to the front of the top surface of the base 1 by bolts, a planetary gear reducer 3 is provided on one side of the plunger pump 2, the output end of the planetary gear reducer 3 is connected to the plunger pump 2, the input end of the planetary gear reducer 3 is connected to a universal shaft 4, the end of the universal shaft 4 away from the planetary gear reducer 3 is connected to a connecting disk 5 and an AC variable frequency motor 6 in sequence, and the AC variable frequency motor 6 is fixed to the base 1 by bolts.

[0039] Example 2

[0040] On the basis of Example 1, the plunger pump 2 includes a pump body 201, the pump body 201 is connected to a crankshaft 202, the crankshaft 202 is connected to a spline flange 203 by bolts, and the spline flange 203 is connected to the output end of the planetary gear reducer 3. The planetary gear reducer 3 includes a primary parallel gear 301, the primary parallel gear 301 is connected to a planetary gear 302, the input end of the primary parallel gear 301 is connected to a power input flange 303, the power input flange 303 is connected to the universal shaft 4, the planetary gear 302 is connected to a fixed flange 304, and the planetary gear 302 is also provided with a drum gear 305 connected to the spline flange 203.

[0041] A plunger pump frame 9 is also provided on the top of the base 1 , and a fixing flange 304 is fixed on the top of the plunger pump frame 9 by bolts.

[0042] Example 3

[0043] On the basis of Embodiment 1, a universal shaft protection cover 7 is provided at the rotating portion of the universal shaft 4 , and the universal shaft protection cover 7 is fixed to the base 1 by bolts.

[0044] The planetary gear reducer 3 is provided with a reducer support frame 8 at the bottom end, and the reducer support frame 8 is fixed to the base 1 by bolts. The power output end of the AC variable frequency motor 6 is provided with a shaft head 601 and a square key 602, and the connecting plate 5 is provided with a keyway 501, and the square key 602 is clearance-matched with the keyway 501.

Claims

1. Water injection pump skid based on planetary gear reducer, characterized in that: The invention comprises a base (1), wherein the front part of the top surface of the base (1) is connected to a plunger pump (2) by bolts, a planetary gear reducer (3) is provided on one side of the plunger pump (2), the output end of the planetary gear reducer (3) is connected to the plunger pump (2), the input end of the planetary gear reducer (3) is connected to a universal shaft (4), the end of the universal shaft (4) away from the planetary gear reducer (3) is connected to a connecting plate (5) and an AC variable frequency motor (6) in sequence, and the AC variable frequency motor (6) is fixed to the base (1) by bolts.

2. The water injection pump skid based on planetary gear reducer according to claim 1, characterized in that: The plunger pump (2) comprises a pump body (201), the pump body (201) is connected to a crankshaft (202), the crankshaft (202) is connected to a spline flange (203) via bolts, and the spline flange (203) is connected to the output end of the planetary gear reducer (3).

3. The water injection pump skid based on planetary gear reducer according to claim 2, characterized in that: The planetary gear reducer (3) comprises a primary parallel gear (301), the primary parallel gear (301) is connected to a planetary gear (302), the input end of the primary parallel gear (301) is connected to a power input flange (303), the power input flange (303) is connected to the universal shaft (4), the planetary gear (302) is connected to a fixing flange (304), and the planetary gear (302) is also provided with a drum-shaped tooth (305) connected to a spline flange (203).

4. The water injection pump skid based on planetary gear reducer according to claim 1, characterized in that: A universal shaft protection cover (7) is provided at the rotating part of the universal shaft (4), and the universal shaft protection cover (7) is fixed to the base (1) by means of bolts.

5. The water injection pump skid based on planetary gear reducer according to claim 1, characterized in that: A reducer support frame (8) is provided at the bottom end of the planetary gear reducer (3), and the reducer support frame (8) is fixed to the base (1) by bolts.

6. The water injection pump skid based on planetary gear reducer according to claim 3, characterized in that: A plunger pump frame (9) is also provided at the top of the base (1), and the fixing flange (304) is fixed to the top of the plunger pump frame (9) by means of bolts.

7. The water injection pump skid based on planetary gear reducer according to claim 1, characterized in that: The power output end of the AC variable frequency motor (6) is provided with a shaft head (601) and a square key (602), the connecting disk (5) is provided with a key slot (501), and the square key (602) is clearance-matched with the key slot (501).

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