CN218717298U

CN218717298U - Fracturing pump power end and fracturing pump

Info

Publication number: CN218717298U
Application number: CN202222755401.0U
Authority: CN
Inventors: 赵永灿; 田琳; 刘杰
Original assignee: Sany Petroleum Intelligent Equipment Co Ltd
Current assignee: Sany Petroleum Intelligent Equipment Co Ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-03-24
Anticipated expiration: 2032-10-18

Abstract

The utility model relates to a fracturing technical field provides a fracturing pump power end and fracturing pump, fracturing pump power end, including casing, power input shaft, driving motor and coupling device, power input shaft at least part power input shaft sets up in the casing, and driving motor's first end is connected on the casing, and driving motor's second end has the opening, and driving motor includes stator and rotor, and the rotor is hollow structure, and the stator cover is established outside the rotor; the coupling device is arranged on the rotor and can be switched between a connection state and a disconnection state, the coupling device is respectively connected with the power input shaft and the rotor in the connection state and used for transmitting the torque of the rotor to the power input shaft, and the coupling device is disconnected with the power input shaft and the rotor in the disconnection state and can be taken out from the opening.

Description

Fracturing pump power end and fracturing pump

Technical Field

The utility model relates to a fracturing equipment technical field especially relates to a fracturing pump power end and fracturing pump.

Background

In the oil and gas field industry, fracturing refers to artificially fracturing underground rock strata, improving the flowing environment of oil and gas underground and increasing the oil and gas yield, and the current fracturing mode is mainly hydraulic fracturing. Acid fracturing is to utilize acid liquor pressurization to etch out the fracture in the underground rock stratum to obtain the artificial fracture of high water conservancy diversion ability, improve the route of oil gas seepage flow, and at present, acid fracturing has become the important means of oil gas field trade increase production, uses the fracturing pump to carry out the operation in the acid fracturing process.

The fracturing pump generally comprises a power end and a hydraulic end, wherein the power end supplies power to the hydraulic end, a gear pair of a power end assembly rotates under the driving of an external power source to drive a crankshaft to rotate, a connecting rod cross head structure is driven to reciprocate, then the power is transmitted to the hydraulic end, and the reciprocating motion of a plunger at the hydraulic end realizes the pumping of high-pressure liquid. Thereby converting the fracturing fluid with certain viscosity under normal pressure into high-pressure and large-displacement fluid to be discharged.

In the prior art, a mode that a motor is connected with a reduction gearbox is usually adopted as a power source to drive a pinion shaft at a power end, the motor drives a fracturing pump to work after the speed of the motor is regulated by the reduction gearbox, sometimes, the power source is connected with the power end and is matched with a corresponding shield, a sealing device, a tensioning device and the like, so that a large number of parts are needed, the connection structure is complex, the installation and maintenance are troublesome, the motor needs to be detached from the power end when the motor breaks down, a large amount of time is wasted in the detaching process, and the progress of fracturing work is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fracturing pump power end and fracturing pump for solve the defect that fracturing pump driving motor maintained the difficulty among the prior art.

In a first aspect, the utility model provides a fracturing pump power end, include:

a housing;

a power input shaft, at least a portion of which is disposed within the housing;

the first end of the driving motor is connected to the shell, the second end of the driving motor is provided with an opening, the driving motor comprises a stator and a rotor, the rotor is of a hollow structure, and the stator is sleeved outside the rotor;

and the coupling device is arranged on the rotor and can be switched between a connection state and a separation state, in the connection state, the coupling device is respectively connected with the power input shaft and the rotor and is used for transmitting the torque of the rotor to the power input shaft, in the separation state, the coupling device is disconnected with the power input shaft and the rotor, and the coupling device can be taken out from the opening.

According to the utility model provides a fracturing pump power end, driving motor's second end can be dismantled the connection end cover, is used for sealing the opening.

According to the utility model provides a fracturing pump power end, coupling device includes the transmission shaft, the rotor is provided with the center shaft hole, the transmission shaft is worn to establish in the center shaft hole, the first end of transmission shaft with power input shaft is along axis direction swing joint, the second end of transmission shaft with the connection can be dismantled to the rotor.

According to the utility model provides a fracturing pump power end, the second end of transmission shaft is formed with the flange along radially extending, the flange with the rotor orientation the terminal surface of opening one end all is provided with the connecting hole, the flange with the rotor passes through the bolt and can dismantle the connection.

According to the utility model provides a fracturing pump power end, driven first end is provided with the spline, the tip correspondence of power input shaft be provided with spline fit's keyway.

According to the utility model provides a fracturing pump power end, coupling device includes the connecting piece, the rotor is provided with the center shaft hole, the power input shaft wears to establish the center shaft is downthehole, the power input shaft is located the outer one end of casing with the rotor orientation the terminal surface of opening one end passes through the connection can be dismantled to the connecting piece.

According to the utility model provides a fracturing pump power end, driving motor with the power input shaft all is provided with a plurality ofly, driving motor with power input shaft one-to-one and transmission are connected.

According to the utility model provides a fracturing pump power end, it is a plurality of driving motor is in along evenly distributed on the circumferencial direction on the casing.

According to the utility model provides a fracturing pump power end, driving motor moves towards the one end of casing is provided with first connection tang, the terminal surface of casing is provided with the second and connects the tang, first connection tang with tang adaptation connection is connected to the second.

In a second aspect, the present invention also provides a fracturing pump, including: the hydraulic pump comprises a power end and a hydraulic end, wherein the hydraulic end comprises a pump head body and a plunger, the output end of the power end is connected with the plunger, and the power end is the power end described in the first aspect.

The utility model provides a fracturing pump power end, adopt the driving motor who has the hollow structure rotor, connect driving motor on the power end casing, when using, transmit the power input shaft of fracturing pump power end with rotor pivoted moment of torsion through coupling device, thereby drive fracturing pump work, when driving motor breaks down, can follow the opening part of driving motor second end, dismantle coupling device and take out, can make driving motor's rotor and fracturing pump power end's power input shaft disconnection fast, need not to adopt the mode of demolising driving motor again, and the maintenance time is saved.

The utility model also provides a fracturing pump, this beneficial effect derive the process similar substantially with the beneficial effect's that foretell power end brought derivation process, and here is no longer repeated.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a fracturing pump power end of an embodiment of the present invention;

fig. 2 is a cross-sectional view of a fracturing pump power end of another embodiment of the present invention;

fig. 3 is a side view of a fracturing pump in an embodiment of the present invention.

Reference numerals are as follows:

1. a housing; 2. a power input shaft; 3. a drive motor; 4. a rotor; 5. an end cap;

6. a drive shaft; 61. a flange; 62. a spline; 7. a connecting bond; 8. a bearing; 9. a pump head body.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A fracturing pump power end and a fracturing pump provided in embodiments of the present invention are described below in conjunction with fig. 1-3.

The fracturing pump power end that this embodiment provided includes: the device comprises a shell 1, a power input shaft 2, a driving motor 3 and a coupling device.

Wherein at least part of the power input shaft 2 is arranged in the housing 1; in some embodiments, the power input shaft 2 is generally a gear shaft, and a gearwheel and a crankshaft are further arranged in the housing 1 at the power end of the fracturing pump, the crankshaft is connected with the gearwheel, and the gearwheel is in meshing transmission with the gear shaft, so that the power of the gear shaft is transmitted to the crankshaft to rotate, and the fracturing pump performs actions of sucking hydraulic media or discharging the hydraulic media.

The first end of driving motor 3 is connected on casing 1, and driving motor 3's second end has the opening, and driving motor 3 includes stator and rotor 4, and rotor 4 is hollow structure, and the stator cover is established outside rotor 4.

The coupling device is arranged on the rotor 4 and can be switched between a connection state and a disconnection state, wherein in the connection state, the coupling device is respectively connected with the power input shaft 2 and the rotor 4 and used for transmitting the torque of the rotor 4 to the power input shaft 2, and in the disconnection state, the coupling device is disconnected with the power input shaft 2 and the rotor 4 and can be taken out from the opening.

According to the above scheme, compare with prior art, the utility model discloses when using, the adoption has hollow structure rotor 4's driving motor 3, transmit rotor 4 pivoted moment of torsion for fracturing pump power end's power input shaft 2 through coupling device, thereby drive fracturing pump work, when driving motor 3 breaks down, can follow the opening part of driving motor 3 second end, dismantle coupling device and take out, can make driving motor 3's rotor 4 and fracturing pump power end's power input shaft 2 disconnection fast, do not influence the operation of system, need not to adopt the mode of demolising driving motor 3 again, maintenance time has been saved.

Optionally, one end of the driving motor 3 facing the casing 1 is provided with a first connecting spigot, the end face of the casing 1 is provided with a second connecting spigot, the first connecting spigot is connected with the second connecting spigot in an adaptive manner, the driving motor 3 and the casing 1 are connected with the pump through the arranged motor connecting spigot and then fixedly connected through a bolt after being installed and positioned, the reliability of connection between the driving motor 3 and the pump is ensured, and the power input shaft 2 is installed on the casing 1 through a bearing 8.

On the other hand, the utility model discloses a coupling device is connected driving motor 3's rotor 4 and fracturing pump power end's 2 power of power input shaft, and the work of direct drive fracturing pump for prior art, has also saved middle power transmission unit, has improved transmission efficiency, has simplified the device structure, has made things convenient for the installation and debugging to maintain, has also reduced the cost simultaneously.

Further, a second end of the driving motor 3 is detachably connected with an end cap 5 for sealing the opening. So, seal the opening through end cover 5, can prevent that the condition of oil leak oil seepage from appearing in driving motor 3's opening, when coupling device is dismantled to needs, demolish end cover 5 earlier, because end cover 5 adopts the mode of dismantling the connection with driving motor 3's tip, like modes such as bolted connection, can guarantee driving motor 3's leakproofness also can not influence the operation of demolising coupling device.

Referring to fig. 1, in one embodiment, the coupling device includes a transmission shaft 6, the rotor 4 is provided with a central shaft hole, the transmission shaft 6 is inserted into the central shaft hole, a first end of the transmission shaft 6 is coaxially detachably connected with the power input shaft 2 along the axial direction, and a second end of the transmission shaft 6 is detachably connected with the rotor 4. That is to say, with transmission shaft 6 as the power take-off shaft of driving motor 3, through transmission shaft 6 and power input shaft 2 lug connection to transmit the moment of torsion of driving motor 3 to the fracturing pump, when driving motor 3 broke down, through dismantling transmission shaft 6, can break off rotor 4 and fracturing pump power end's power input shaft 2.

It should be noted that, when the transmission shaft 6 is not connected to the rotor 4 and the power input shaft 2, the transmission shaft 6 is inserted into the rotor 4 and is movably connected to the rotor 4, and the transmission shaft 6 corresponds to the opening of the driving motor 3, the transmission shaft 6 is preferably of a cylindrical structure, and the diameter of the cross section of the transmission shaft 6 should be smaller than the diameter of the central shaft hole of the rotor 4, so that the transmission shaft 6 is not affected in removal and installation, and in order not to affect the stable connection between the transmission shaft 6 and the power output shaft, the gap between the transmission shaft 6 and the central shaft hole of the rotor 4 should not be too large, and the transmission shaft 6 can just penetrate into the rotor 4.

Specifically, a flange 61 is formed at the second end of the transmission shaft 6 in a radially extending manner, the inner side of the flange 61 abuts against the end surface of the rotor 4 facing the open end and is provided with a connecting hole, and then the flange 61 and the rotor 4 are connected through a bolt or a positioning pin. So set up, the accessible is at the opening part with bolt or locating pin dismantlement, then takes out transmission shaft 6 to realize rotor 4 and power input shaft 2 disconnection.

Based on this, the first end of the transmission shaft 6 is movably connected with the power input shaft 2 along the axial direction, the first end of the transmission shaft 6 is connected with the power input shaft 2, and after the second end of the transmission shaft 6 is connected with the rotor 4, the first end of the transmission shaft 6 is relatively fixed with the power input shaft 2. For example, with the first end of transmission shaft 6 and power input shaft 2 through the key-type connection, can be that the first end at transmission shaft 6 is provided with spline 62, the tip at power input shaft 2 corresponds is provided with the keyway, with spline 62 and keyway grafting cooperation along the axis direction, realize transmission shaft 6 and power input shaft 2's transmission and be connected to can transmit the moment of torsion of rotor 4 for power input shaft 2 through transmission shaft 6, and the convenient separation with spline 62 and keyway along the axial.

Referring to fig. 2, in another embodiment, the coupling device comprises a connecting piece, the rotor 4 is provided with a central shaft hole, the power input shaft 2 of the power end of the fracturing pump extends out of the housing 1 and penetrates through the central shaft hole of the rotor 4, and one end of the power input shaft 2, which is positioned outside the housing 1, is detachably connected with one end, facing the opening, of the rotor 4 through the connecting piece. So set up, realize the power transmission of rotor 4 and power input shaft 2 through the connecting piece, the accessible is demolishd the connecting piece at the opening part to with

rotor

4 and 2 disconnection of power input shaft, consequently, when driving motor 3 broke down, can be very convenient take out the connecting piece through the opening, alright disconnection driving motor 3 and fracturing pump power end's power connection, save maintenance time.

It should be noted that the cross-sectional diameter of the power input shaft 2 is smaller than the diameter of the central shaft hole of the rotor 4, as in the case of the transmission shaft 6, so that it cannot be connected to the rotor 4 without a coupling member and can stably transmit torque after being connected to the rotor 4 by the coupling member.

The following description of the connection piece is given in a specific embodiment.

The connecting piece is connecting key 7, and rotor 4 passes through the key-type connection with power input shaft 2, and the concave keyway that is equipped with on rotor 4's the one end lateral wall towards the open-ended, set up the keyhole that corresponds and be linked together with rotor 4's keyway on power input shaft 2's the terminal surface, connecting key 7 inlays and establishes in rotor 4's keyway and power input shaft 2's keyhole, realizes rotor 4 and power input shaft 2's transmission and is connected to the dismouting is very convenient.

It should be understood that the connecting member is not limited to the above-described connecting key 7, and the connecting member may have other configurations.

For example, the connecting member may be a connecting flange, the connecting flange includes a shaft sleeve and a flange 61 formed by extending outside the shaft sleeve, first, the shaft sleeve is sleeved on the power input shaft 2 and is fixedly connected with the power input shaft 2, or the shaft sleeve may be detachably connected by bolts, pins or connecting keys 7; the inner side surface of the flange 61 is abutted against the side wall of one end, facing the opening, of the rotor 4, then connecting holes are formed in the side walls of the flange 61 and the rotor 4, and the flange 61 and the rotor 4 are fixedly connected through a pin shaft and a bolt, so that the rotor 4 is in transmission connection with the power input shaft 2.

In this embodiment, the driving motors 3 and the power input shafts 2 are provided in plurality, and the driving motors 3 and the power input shafts 2 are in one-to-one correspondence and are in transmission connection. The number of the driving motors 3 is configured according to the power required by the fracturing pump, when one of the driving motors is damaged, the connecting device can be quickly disassembled to disconnect the power connection between the driving motor 3 and the power end of the fracturing pump, a large amount of time is not needed to be consumed to disassemble the driving motor 3, the work of other motors is not influenced, the working efficiency is high, the driving power and the number of the driving motors 3 are not particularly limited, and the configuration can be selected according to the needs. Due to the fact that the plurality of driving motors 3 are arranged, temporary power reduction operation without influencing equipment can be achieved.

Alternatively, a plurality of driving motors 3 are provided at one side or both sides of the housing 1. And a plurality of drive motors 3 are evenly distributed on the housing 1 in the circumferential direction.

The embodiment of the utility model provides a fracturing pump is still provided, as shown in fig. 3, include: the hydraulic pump comprises a power end and a hydraulic end, wherein the hydraulic end comprises a pump head body 9 and a plunger, the output end of the power end is connected with the plunger, and the power end is the power end.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A frac pump power end, comprising:

the power input shaft (2), at least part of the power input shaft (2) is arranged in the shell (1) of the power end;

the first end of the driving motor (3) is connected to the shell (1), the second end of the driving motor (3) is provided with an opening, the driving motor (3) comprises a stator and a rotor (4), the rotor (4) is of a hollow structure, and the stator is sleeved outside the rotor (4);

the coupling device is arranged on the rotor (4) and can be switched between a connection state and a disconnection state, in the connection state, the coupling device is respectively connected with the power input shaft (2) and the rotor (4) and used for transmitting the torque of the rotor (4) to the power input shaft (2), in the disconnection state, the coupling device is disconnected with the power input shaft (2) and the rotor (4), and the coupling device can be taken out from the opening.

2. Fracturing pump power end according to claim 1, characterized in that the second end of the drive motor (3) is detachably connected with an end cap (5) for sealing the opening.

3. The fracturing pump power end according to claim 1, wherein the coupling device comprises a transmission shaft (6), the rotor (4) is provided with a central shaft hole, the transmission shaft (6) is arranged in the central shaft hole in a penetrating manner, a first end of the transmission shaft (6) is movably connected with the power input shaft (2) along an axial direction, and a second end of the transmission shaft (6) is detachably connected with the rotor (4).

4. A frac pump power end according to claim 3, wherein the second end of the drive shaft (6) is formed with a radially extending flange (61), the flange (61) being removably connected to the end face of the rotor (4) facing the open end.

5. A fracturing pump power end according to claim 3, characterized in that the first end of the transmission shaft (6) is provided with splines (62) and the end of the power input shaft (2) is correspondingly provided with keyways cooperating with the splines (62).

6. A frac pump power end according to claim 1, wherein the coupling means comprises a connector, the rotor (4) is provided with a central shaft bore, the power input shaft (2) is arranged through the central shaft bore, and one end of the power input shaft (2) near the opening is detachably connected with the rotor (4) through the connector.

7. The fracturing pump power end of claim 1, wherein a plurality of driving motors (3) and power input shafts (2) are arranged, and the driving motors (3) and the power input shafts (2) are in one-to-one correspondence and are in transmission connection.

8. Fracturing pump power end according to claim 7, characterized in that a plurality of said drive motors (3) are evenly distributed in circumferential direction on said housing (1).

9. The fracturing pump power end according to claim 1, characterized in that the end of the drive motor (3) facing the housing (1) is provided with a first connecting spigot, and the end face of the housing (1) is provided with a second connecting spigot, the first connecting spigot and the second connecting spigot being adapted to connect.

10. A fracturing pump, comprising a power end according to any of claims 1 to 9 and a fluid end, and wherein the fluid end comprises a pump head body (9) and a plunger, and wherein the output end of the power end is connected to the plunger.