Distributed slurry pump electric drive transmission system

Abstract

The utility model discloses a distributed slurry pump electric drive transmission system which comprises a prying seat, a slurry pump, a reduction gearbox and a drive motor, wherein the slurry pump, the reduction gearbox and the drive motor are arranged on the prying seat. The multiple driving motors are connected with the input ends of the reduction gearboxes, the output ends of the reduction gearboxes are connected with the slurry pump, each reduction gearbox is jointly driven by two or more driving motors, each reduction gearbox comprises one or two independent box bodies and a gear reduction mechanism arranged in the corresponding box body, and when one reduction gearbox comprises two independent box bodies, the gear reduction mechanism is driven by one or more driving motors. The gear reduction mechanisms in the two box bodies are connected through a coupler or a transmission shaft. According to the utility model, a plurality of high-speed, light and high-power-density motors are adopted to replace a traditional single high-power motor, the plurality of motors are driven in parallel, and the motors are backups for each other, so that mud pump devices with different powers can be adapted according to requirements, and different operation requirements can be met; and the box body connected with the driving motor can be directly mounted on the prying seat, and is more stable.

Description

Technical Field

[0001] This utility model relates to the field of mud pump transmission technology. More specifically, this utility model relates to a distributed electric drive transmission system for mud pumps. Background Technology

[0002] Conventional electric mud pumps typically use one or two high-power, medium-to-low-speed AC asynchronous motors as power sources, which drive the mud pump's power end via belt pulley transmission. With the rapid development of deep oil and gas exploration and development, drilling pressure and displacement requirements are further increasing, leading to a continuous increase in the power of the required motors and transmission systems, as well as their size and weight, posing significant challenges to the manufacturing, integration, and transportation of the equipment.

[0003] With the development of motor technology, the design and manufacturing technologies of high-speed, lightweight, and high-power-density motors have become increasingly mature. However, the existing technical solutions for the transmission systems of slurry pumps prevent the implementation of these advanced motor technologies in this field. Therefore, changing the design concept of the slurry pump power transmission system, applying motor technology with higher speed and higher power density, and proposing corresponding power transmission system technical solutions are of great significance for improving the power density of high-power slurry pumps and reducing their size and manufacturing costs. Utility Model Content

[0004] The purpose of this utility model is to provide a distributed mud pump electric drive transmission system, which uses multiple high-speed, lightweight, and high-power-density motors to replace the traditional single high-power motor. The multiple motors are connected in parallel for driving, and each motor serves as a backup for the others. It can be adapted to mud pump devices of different power as needed to meet different operational requirements. When the gearbox includes two independent housings, the housing connected to the drive motor can be directly installed on the skid, which is more stable.

[0005] The technical solution adopted by this utility model to solve this technical problem is: a distributed mud pump electric drive transmission system is provided, including a skid base and a mud pump, a gearbox and a drive motor installed on the skid base;

[0006] Multiple drive motors are connected to the input end of the gearbox, and the output end of the gearbox is connected to the mud pump. Each gearbox is driven by two or more drive motors. Each gearbox includes one or two independent housings and a gear reduction mechanism installed inside the housing. When a gearbox includes two independent housings, the gear reduction mechanisms inside the two housings are connected by a coupling or a drive shaft.

[0007] Preferably, in the distributed mud pump electric drive transmission system, the gear reduction mechanism includes an input gear reduction mechanism and an output gear reduction mechanism. The input gear reduction mechanism is provided with multiple gearbox input shafts, and the output gear reduction mechanism is provided with a gearbox output shaft.

[0008] The input shaft of the gearbox is directly connected to the output shaft of the drive motor or connected through a transmission shaft / coupling, and the output shaft of the gearbox is connected to the crankshaft of the power end of the mud pump.

[0009] Preferably, in the distributed mud pump electric drive system, when a gearbox includes a housing, the input gear reduction mechanism and the output gear reduction mechanism are connected by gear meshing.

[0010] When a gearbox includes two housings, the input gear reduction mechanism and the output gear reduction mechanism are respectively set in two independent housings. The input gear reduction mechanism is provided with an output shaft, and the output gear reduction mechanism is provided with an input shaft. The output shaft and the input shaft are connected by a coupling or a transmission shaft.

[0011] Preferably, in the distributed mud pump electric drive system, the input gear reduction mechanism is a single-stage parallel shaft gear reduction mechanism, and the output gear reduction mechanism is a single single-stage / double-stage parallel shaft gear reduction mechanism or a combination of a single-stage parallel shaft gear reduction mechanism and a planetary gear reduction mechanism.

[0012] Preferably, in the distributed mud pump electric drive system, the drive motor is mounted on a motor bracket that is fixedly connected to the skid.

[0013] Preferably, in the distributed mud pump electric drive system, the gearbox housing is provided with several supports, the gearbox housing is connected to the skid or mud pump housing through the supports, and the supports are fixed to the skid or mud pump housing by bolts or welding.

[0014] When the support is bolted to the skid or mud pump housing, a vibration damping device is provided between the support and the skid or mud pump housing.

[0015] Preferably, in the distributed mud pump electric drive system, the gearbox housing is provided with several support rods, the gearbox housing is connected to the skid or mud pump housing through the support rods, and the support rods are connected to the skid or mud pump housing by bolts or welding.

[0016] When the support rod is bolted to the skid or mud pump housing, the support rod is equipped with a vibration damping device.

[0017] Preferably, in the distributed mud pump electric drive system, the gearbox input side housing is connected to the drive motor housing by flange and bolts, positioning by a stop structure, or by a motor connecting seat, and the gearbox output side housing is fixedly connected to the mud pump housing by flange and bolts or bolts and positioning pins.

[0018] Preferably, in the distributed mud pump electric drive system, the planetary gear transmission mechanism adopts a spur gear, helical gear, or herringbone gear structure, and the parallel shaft gear reduction mechanism adopts a spur gear, helical gear, or herringbone gear structure.

[0019] This utility model has at least the following beneficial effects:

[0020] 1. Replacing the traditional single high-power motor with multiple high-speed, lightweight, and high-power-density motors as the power source for the mud pump can significantly reduce the output torque of the motor, thereby significantly reducing the size and weight of the motor and increasing the power density of the power transmission module.

[0021] 2. Multiple motors are used in parallel drive, with each motor serving as a backup for the others. Even if some motors fail, the other motors can still drive the mud pump. Although the overall power is reduced, there is no need to stop the pump, minimizing the impact on the operation. In contrast, with traditional single-motor drive solutions, if a motor fails during fracturing operations, the entire fracturing unit must be shut down, resulting in a significant loss of output power and a substantial impact on the operation's effectiveness.

[0022] 3. It can be adapted to different power mud pump devices as needed, and the motor specifications, quantity, installation method and layout can be flexibly adjusted to meet different operation requirements.

[0023] 4. When the gearbox consists of two independent housings, the housing connected to the drive motor can be directly mounted on the skid mount, which is more stable.

[0024] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0025] Figure 1 This is a top view of Embodiment 1 of the present utility model;

[0026] Figure 2 This is a side view of Embodiment 1 of the present utility model;

[0027] Figure 3 This is a top view of Embodiment 2 of the present invention;

[0028] Figure 4 This is a side view of Embodiment 2 of the present invention;

[0029] Figure 5 This is a top view of Embodiment 3 of the present invention;

[0030] Figure 6 This is a rear view of Embodiment 3 of the present invention;

[0031] Figure 7 This is a schematic diagram of the gearbox structure of the electric drive transmission system according to Embodiment 1 of this utility model;

[0032] Figure 8 A schematic diagram of the gearbox structure of the electric drive transmission system in Embodiment 2 of this utility model;

[0033] Figure 9 A schematic diagram of the gearbox structure of the electric drive transmission system in Embodiment 3 of this utility model;

[0034] Reference numerals in the attached drawings: 1. Drive motor; 1-1. Motor output shaft; 2. Gearbox; 2-1. Gearbox mounting flange; 2-2. Gearbox input shaft; 2-3. Gearbox output shaft; 2-4. Gearbox housing; 2-5. Support rod interface; 2-6. Motor connecting seat; 2-7. Gearbox housing one; 2-8. Gearbox housing two; 2-9. Output shaft; 2-10. Input shaft; 3. Mud pump; 4. Skid mount; 5. Drive shaft; 6. Support rod; 7. Motor bracket; 8. Support. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0036] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0037] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0038] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0039] This utility model provides a distributed electric drive transmission system for a mud pump, including a skid 4 and a mud pump 3, a gearbox 2 and a drive motor 1 mounted on the skid 4; the skid 4 provides an installation and support structure for the mud pump 3, the gearbox 2 and the drive motor 1.

[0040] Multiple drive motors 1 are connected to the input end of a reduction gearbox 2, and the output end of the reduction gearbox 2 is connected to a mud pump 3, thereby transmitting power from the drive motors 1 to the power end of the mud pump 3 to enable the operation of the mud pump. The drive motors 1 and reduction gearboxes 2 are distributed on one or both sides of the mud pump 3. Each reduction gearbox 2 is driven by two or more drive motors 1. Each reduction gearbox 2 includes one or two independent housings and a gear reduction mechanism installed inside the housings. When a reduction gearbox 2 includes two independent housings, the gear reduction mechanisms inside the two housings are connected by a coupling or a drive shaft.

[0041] In this embodiment, a preferred implementation is that the input end of the gearbox 2 is provided with multiple evenly or non-evenly distributed gearbox input shafts 2-2 and motor connectors 2-6 for connecting to multiple drive motors 1. The number of gearbox input shafts 2-2, motor connectors 2-6 and drive motors 1 can be adjusted according to the required input power.

[0042] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the gear reduction mechanism includes an input gear reduction mechanism and an output gear reduction mechanism. The input gear reduction mechanism is provided with multiple gearbox input shafts 2-2, and the output gear reduction mechanism is provided with a gearbox output shaft 2-3.

[0043] The input shaft 2-2 of the gearbox extends out of the gearbox and is directly connected to the output shaft 1-1 of the drive motor 1 or connected through the transmission shaft 5 / coupling. The output shaft 2-3 of the gearbox extends out of the gearbox and is connected to the crankshaft of the power end of the mud pump 3.

[0044] Furthermore, in the aforementioned distributed mud pump electric drive system, when a gearbox 2 includes a housing, the input gear reduction mechanism and the output gear reduction mechanism are connected by gear meshing.

[0045] When a gearbox 2 includes two housings, the input gear reduction mechanism and the output gear reduction mechanism are respectively installed in two independent housings. Gearbox housing 1 2-7 is connected to the housing of the drive motor 1, and gearbox housing 2-8 is connected to the housing of the mud pump 3. The input gear reduction mechanism and the output gear reduction mechanism are respectively installed in gearbox housing 1 2-7 and gearbox housing 2-8. The input gear reduction mechanism is provided with an output shaft 2-9, and the output gear reduction mechanism is provided with an input shaft 2-10. The output shaft 2-9 of gearbox housing 1 and the input shaft 2-10 of gearbox housing 2 are connected by a coupling or a transmission shaft 5.

[0046] The driving method of the mud pump 3 is as follows: the output shaft 1-1 of multiple drive motors 1 is connected to the input shaft 2-2 of the gearbox 2. After the power is gathered, it is reduced by the first stage of the input end gear reduction mechanism and then reduced again by the output end gear reduction mechanism. The power is then transmitted to the crankshaft of the mud pump power end through the output shaft 2-3 of the gearbox, which drives the crankshaft inside the mud pump 3 to rotate.

[0047] When the gearbox 2 includes two independent gearbox housings, gearbox housing 1 2-7 and gearbox housing 2-8, the power is reduced by the first stage of the input end gear reduction mechanism, and then transmitted to the input shaft 2-10 of gearbox housing 2 through the output shaft 2-9 of gearbox housing 1, and then transmitted to the crankshaft of the power end of the mud pump by the output shaft 2-3 of the gearbox, thereby driving the mud pump 3 to work.

[0048] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the input end gear reduction mechanism is a single-stage parallel shaft gear reduction mechanism, and the output end gear reduction mechanism is a single single-stage / double-stage parallel shaft gear reduction mechanism or a combination of a single-stage parallel shaft gear reduction mechanism and a planetary gear reduction mechanism.

[0049] When the output gear reduction mechanism is a combination of a single-stage parallel shaft gear reduction mechanism and a planetary gear reduction mechanism, the planet carrier of the planetary gear reduction mechanism can be connected to the crankshaft inside the power end of the mud pump 3 through a double-drum gear shaft, coupling or transmission shaft to transmit torque.

[0050] Furthermore, in the aforementioned distributed mud pump electric drive system, the drive motor 1 is mounted on a motor bracket 7 that is fixedly connected to the skid 4. The drive motor 1 is mounted on a separate motor bracket 7, which is fixed to the skid 4.

[0051] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the gearbox 2 is provided with several supports 8, and the supports 8 are connected to the gearbox 2 by bolts or welding. The gearbox 2 is connected to the skid 4 or the mud pump 3 housing through the supports 8, and the supports 8 are connected to the skid 4 or the mud pump 3 housing by bolts or welding.

[0052] When the support 8 is bolted to the skid 4 or the mud pump 3 housing, a vibration damping device is provided between the support 8 and the skid 4 or the mud pump 3 housing, and the installation height or distance can be adjusted according to actual installation needs.

[0053] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the gearbox 2 is provided with several support rods 6, which are connected to the gearbox 2 by bolts or welding. The gearbox 2 is connected to the skid 4 or the mud pump 3 housing by the support rods 6, and the support rods 6 are connected to the skid 4 or the mud pump 3 housing by bolts or welding.

[0054] When the support rod 6 is bolted to the skid 4 or the housing of the mud pump 3, the support rod 6 is equipped with a vibration damping device, and the installation height or distance can be adjusted according to the actual installation needs.

[0055] When the gearbox includes two housings, the gearbox housing 2-7 connected to the drive motor can be directly connected to the skid 4 via bolts and nuts, and the gearbox housing 2-8 is connected to the mud pump 3 via a flange, and the mud pump 3 is connected to the skid 4 via bolts and nuts.

[0056] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the gearbox 2 input side housing is connected to the drive motor 1 housing via flange and bolts, a stop structure for positioning, or a motor connecting seat 2-6. When a stop structure is used for positioning, the male stop is located in the drive motor 1 housing and the female stop is located in the gearbox 2 housing, or the male stop is located in the gearbox 2 housing and the female stop is located in the drive motor 1 housing.

[0057] The gearbox 2 is fixedly connected to the mud pump 3 housing via a flange and bolts or bolts and locating pins on one side of the output end.

[0058] Furthermore, in the aforementioned distributed mud pump electric drive transmission system, the planetary gear transmission mechanism adopts a spur gear, helical gear, or herringbone gear structure, and the parallel shaft gear reduction mechanism adopts a spur gear, helical gear, or herringbone gear structure.

[0059] This utility model provides the following three embodiments:

[0060] Example 1: Figure 1 , Figure 2 and Figure 7 A specific implementation is provided, wherein the mud pump 3 is fixedly mounted on the skid 4, and the gearbox 2 is fixedly connected to the mud pump 3 through the gearbox mounting flange 2-1; the drive motor 1 is fixedly placed on the skid 4 through the motor bracket 7; the motor output shaft 1-1 is mounted with a flange and is connected to the gearbox input shaft flange through the transmission shaft 5, and the gearbox input shaft flange is assembled on the gearbox input shaft 2-2; after the power of multiple motors is gathered into the gearbox 2, it is transmitted to the power end crankshaft of the mud pump 3 through the gearbox output shaft 2-3, thereby driving the mud pump 3 to work.

[0061] The number and angle of the drive motor 1 and the input shaft 2-2 of the gearbox can be adjusted according to power and structural requirements. The gearbox 2 can be installed on one or both sides of the mud pump.

[0062] In addition, such as Figure 2 As shown, the gearbox housing 2-4 is designed with a support interface, which connects to the support 8; the bottom of the support 8 is connected to the skid 4; vibration damping devices such as elastic and / or damping devices can be installed between the support 8 and the skid 4 as needed; the position and number of the supports 8 can be set as needed. Figure 7 As shown, the gearbox housing 2-4 is designed with a support rod interface 2-5, which is connected to the support rod 6. The support rod 6 is connected to the skid 4 or the mud pump 3 housing.

[0063] Example 2: Figure 3 , Figure 4 and Figure 8 A second implementation method is provided. The difference from the first embodiment is that multiple drive motors 1 are fixedly connected to the input end of the gearbox 2 via motor connecting supports 2-6; the motor output shafts 1-1 are directly connected to the gearbox input shaft 2-2; the drive motors 1 are installed in pairs facing each other, with the output shafts 1-1 of each pair of drive motors 1 connected to the left and right ends of the same gearbox input shaft 2-2; the power from the multiple drive motors 1 is converged into the gearbox 3, and then transmitted to the crankshaft at the power end of the mud pump 3 via the gearbox output shaft 2-3, thereby driving the mud pump 3 to operate.

[0064] In this second embodiment, there is no support 8. The support rod interface 2-5 is located at the bottom of the gearbox housing 2-4. The support rod interface 2-5 is connected to the skid 4 or the mud pump 3 housing through the support rod 6.

[0065] Example 3: Figure 5 , Figure 6 and Figure 9 A third implementation method is provided, which, compared to Embodiments 1 and 2, is characterized in that the gearbox 2 comprises two independent housings: a gearbox housing 2-7 and a gearbox housing 2-8. Multiple drive motors 1 are fixedly connected to the input end of gearbox housing 2-7 via motor connecting supports 2-6; the motor output shafts 1-1 are directly connected to the gearbox input shaft 2-2; the power from the multiple motors converges at gearbox housing 2-7 and is transmitted to the drive shaft 5 via gearbox housing 1 output shaft 2-9; the drive shaft 5 is connected to the input shaft 2-10 of gearbox housing 2, inputting the power transmitted by the drive shaft 5 into gearbox housing 2-8; and the power is transmitted to the crankshaft of the mud pump 3 via gearbox housing 2-3, thereby driving the mud pump 3 to operate.

[0066] In this embodiment, there is no support 8, no support rod 6, and no motor support 7. The gearbox housing 1 2-7 is directly connected to the skid 4 by bolts and nuts. The gearbox housing 2-8 is connected to the mud pump 3 by a flange. The mud pump 3 is connected to the skid 4 by bolts and nuts.

[0067] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A distributed mud pump electric drive system, characterized in that, Includes a skid base and a mud pump, gearbox, and drive motor mounted on the skid base; Multiple drive motors are connected to the input end of the gearbox, and the output end of the gearbox is connected to the mud pump. Each gearbox is driven by two or more drive motors. Each gearbox includes one or two independent housings and a gear reduction mechanism installed inside the housing. When a gearbox includes two independent housings, the gear reduction mechanisms inside the two housings are connected by a coupling or a drive shaft.

2. The distributed mud pump electric drive system as described in claim 1, characterized in that, The gear reduction mechanism includes an input gear reduction mechanism and an output gear reduction mechanism. The input gear reduction mechanism is provided with multiple gearbox input shafts, and the output gear reduction mechanism is provided with a gearbox output shaft. The input shaft of the gearbox is directly connected to the output shaft of the drive motor or connected through a transmission shaft / coupling, and the output shaft of the gearbox is connected to the crankshaft of the power end of the mud pump.

3. The distributed mud pump electric drive system as described in claim 2, characterized in that, When a gearbox includes a housing, the input gear reduction mechanism and the output gear reduction mechanism are connected by gear meshing. When a gearbox includes two housings, the input gear reduction mechanism and the output gear reduction mechanism are respectively set in two independent housings. The input gear reduction mechanism is provided with an output shaft, and the output gear reduction mechanism is provided with an input shaft. The output shaft and the input shaft are connected by a coupling or a transmission shaft.

4. The distributed mud pump electric drive system as described in claim 2 or 3, characterized in that, The input gear reduction mechanism is a single-stage parallel shaft gear reduction mechanism, and the output gear reduction mechanism is a single single-stage / double-stage parallel shaft gear reduction mechanism or a combination of a single-stage parallel shaft gear reduction mechanism and a planetary gear reduction mechanism.

5. The distributed mud pump electric drive system as described in claim 1, characterized in that, The drive motor is mounted on a motor bracket that is fixedly connected to the skid.

6. The distributed mud pump electric drive system as described in claim 1, characterized in that, The gearbox housing is provided with several supports, and the gearbox housing is connected to the skid or mud pump housing through the supports. The supports and the skid or mud pump housing are all fixed by bolts or welding. When the support is bolted to the skid or mud pump housing, a vibration damping device is provided between the support and the skid or mud pump housing.

7. The distributed mud pump electric drive system as described in claim 1, characterized in that, The gearbox housing is provided with several support rods, and the gearbox housing is connected to the skid or mud pump housing through the support rods. The support rods and the skid or mud pump housing are all connected by bolts or welded. When the support rod is bolted to the skid or mud pump housing, the support rod is equipped with a vibration damping device.

8. The distributed mud pump electric drive system as described in claim 1, characterized in that, The gearbox input side housing is connected to the drive motor housing by flange and bolts, positioning by a stop structure, or by a motor connector. The gearbox output side housing is fixedly connected to the mud pump housing by flange and bolts or bolts and locating pins.

9. The distributed mud pump electric drive system as described in claim 4, characterized in that, The planetary gear transmission mechanism adopts a spur gear, helical gear, or herringbone gear structure, and the parallel shaft gear reduction mechanism adopts a spur gear, helical gear, or herringbone gear structure.

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