Power transmission mechanism of electrically-driven slurry pump

Abstract

The utility model discloses a power transmission mechanism of an electric mud pump. The power transmission mechanism comprises a motor, a speed reducer, a transmission shaft, a small gear, a large gear, a crankshaft and a mud pump body, the motor is connected with the power input end of the speed reducer, the speed reducer is installed on the mud pump body, the power output end of the speed reducer is connected with the transmission shaft in the mud pump body, and the pinion is installed on the transmission shaft. The crankshaft is mounted in the slurry pump body, a large gear is mounted at one end of the crankshaft, and the small gear is meshed with the large gear; the small gear 7 and the large gear 5 in the slurry pump body 4 are matched to replace a second-stage speed reduction structure of an original planetary speed reducer, so that the space is greatly saved, the overall width of the slurry pump can be shortened by at least 100 mm, the transportation cost is effectively reduced, and the construction adaptability in a narrow space is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of horizontal directional drilling machines, in particular to a power transmission mechanism of an electric-driven mud pump. Background Art

[0002] Horizontal directional drilling rigs have gradually become one of the main equipment for trenchless construction, occupying more than 85% of the market share; they are widely used in the laying and construction of underground water supply, sewage, oil and gas, communications, power supply and other pipelines. Mud pump equipment is an indispensable and important component in the directional crossing process of horizontal directional drilling rigs; currently, the matching mud pumps are generally driven by diesel engines or hydraulic systems, but diesel engines are noisy, have low energy utilization efficiency and cause serious environmental pollution.

[0003] In recent years, domestic electric-driven mud pumps have been favored by the majority of users due to their advantages such as low noise and low cost. However, electric-driven mud pumps currently generally use permanent magnet synchronous motors to drive planetary reducers. Planetary reducers drive the crankshaft to rotate to achieve power transmission. Since the rotational torque of the crankshaft driving the mud pump is large, the planetary reducer requires at least two stages of reduction, and the length of the planetary reducer will be longer. In addition, the permanent magnet synchronous motor is much longer than the traditional motor at the same power, which ultimately results in the size of the mud pump being much larger than that of the conventional hydraulically driven mud pump, resulting in increased transportation costs and difficulty in construction in a small space or even inability to arrange it. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a power transmission mechanism for an electric-driven mud pump.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A power transmission mechanism of an electric-driven mud pump, comprising a motor (1), a reducer (2), a transmission shaft (6), a small gear (7), a large gear (5), a crankshaft (3) and a mud pump body (4);

[0007] The motor (1) is connected to the power input end of the reducer (2), the reducer (2) is mounted on the mud pump body (4), and the power output end of the reducer (2) is connected to the transmission shaft (6) inside the mud pump body (4), and the pinion (7) is mounted on the transmission shaft (6);

[0008] The crankshaft (3) is installed inside the mud pump body (4), and a large gear (5) is installed at one end of the crankshaft. The small gear (7) meshes with the large gear (5).

[0009] As a preferred technical solution of the present utility model, further: in the aforementioned power transmission mechanism of an electric-driven mud pump, the reducer 2 is a single-stage planetary reducer.

[0010] In the aforementioned power transmission mechanism of an electric-driven mud pump, the motor 1 is a permanent magnet synchronous motor.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model uses the cooperation between the small gear 7 and the large gear 5 inside the mud pump body 4 to replace the second-stage reduction structure of the original planetary reducer, thereby greatly saving space. The overall width of the mud pump can be shortened by at least 100mm, effectively reducing transportation costs and enhancing the adaptability of construction in narrow spaces;

[0013] 2. The power transmission mechanism in the utility model is driven by an electric motor, which greatly reduces the construction cost of the mud pump;

[0014] 3. The reducer in the utility model adopts a first-stage reduction, and the reduction structure in the mud pump body 4 is used to replace the second-stage reduction structure of the original planetary reducer. The mud pump body 4 is used as a support, and the comprehensive cost of the equipment is reduced by more than 3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a top view of the structure of the utility model;

[0017] Figure 2 It is a side sectional view of the utility model;

[0018] Among them: 1-motor, 2-reducer, 3-crankshaft, 4-mud pump body, 5-large gear, 6-transmission shaft, 7-small gear, 8-transmission rod, 9-pump cylinder, 10-guide sleeve, 11-connecting rod, 13-water inlet valve, 14-water outlet valve, 15-piston. DETAILED DESCRIPTION

[0019] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below according to specific implementation methods and in combination with the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, this embodiment provides a power transmission mechanism of an electric-driven mud pump, including a motor 1, a reducer 2, a transmission shaft 6, a pinion 7, a large gear 5, a crankshaft 3 and a mud pump body 4;

[0021] The motor 1 is connected to the power input end of the reducer 2, the reducer 2 is installed on the mud pump body 4, and the power output end of the reducer 2 is connected to the transmission shaft 6 inside the mud pump body 4, and the pinion 7 is installed on the transmission shaft 6;

[0022] The crankshaft 3 is installed inside the mud pump body 4, and a large gear 5 is installed at one end of the crankshaft 3, and a small gear 7 is meshed with the large gear 5.

[0023] The reducer 2 is a single-stage planetary reducer, and the motor 1 is a permanent magnet synchronous motor.

[0024] A guide sleeve 10 is also slidably arranged in the mud pump body 4, and the outer wall of the guide sleeve 10 is in contact with the inner wall of the mud pump body 4. The sliding direction of the guide sleeve 10 is parallel to the moving direction of the piston 15, and the axis of the guide sleeve 10 coincides with the axis of the piston 15. The guide sleeve 10 and the piston 15 are connected by a connecting rod 11, and the end of the transmission rod 8 away from the crankshaft 3 is connected to the fixed guide sleeve 10, so that when the crankshaft 3 rotates, the guide sleeve 10 can be driven to reciprocate through the transmission rod 8, and then the piston 15 can be driven to reciprocate in the pump cylinder 9 through the guide sleeve 10. The force applied by the guide sleeve 10 to the piston 15 is always parallel to the moving direction of the piston 15, so that the piston 15 can move more smoothly in the pump cylinder 9;

[0025] During specific operation, the motor 1 drives the reducer 2 to rotate and output power. The power output end of the reducer 2 drives the transmission shaft 6 installed in the mud pump body 4 to rotate. The transmission shaft 6 drives the small gear 7 to rotate and drives the large gear 5 to rotate through the engagement of the small gear 7 with the large gear 5. The large gear 5 drives the crankshaft 3 to rotate, and the crankshaft 3 drives the transmission rod 8 to move, driving the guide sleeve 10 to reciprocate in the mud pump body 4, and then drives the piston 15 to reciprocate in the pump cylinder 9. When the piston 15 moves out of the pump cylinder 9, the water inlet valve 13 is opened and the water outlet valve 14 is closed, so that the mud can be sucked into the pump cylinder 9; when the piston 15 moves into the pump cylinder 9, the water outlet valve 14 is opened and the water inlet valve 13 is closed, so that the mud can be transported out in the form of high pressure.

[0026] In this embodiment, the small gear 7 and the large gear 5 inside the mud pump body 4 are matched to replace the second-stage reduction structure of the original planetary reducer, thereby greatly saving space. The overall width of the mud pump can be shortened by at least 100 mm, effectively reducing transportation costs and enhancing construction adaptability in narrow spaces; the power transmission mechanism is driven by an electric motor, which greatly reduces the construction cost of the mud pump; the reducer adopts a single-stage reduction, and the reduction structure in the mud pump body 4 is used to replace the second-stage reduction structure of the original planetary reducer, and the mud pump body 4 is used as a support, and the comprehensive cost of the equipment is reduced by more than 3%.

[0027] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A power transmission mechanism for an electric-driven mud pump, characterized in that: It comprises a motor (1), a reducer (2), a transmission shaft (6), a small gear (7), a large gear (5), a crankshaft (3) and a mud pump body (4); The motor (1) is connected to the power input end of the reducer (2), the reducer (2) is mounted on the mud pump body (4), and the power output end of the reducer (2) is connected to the transmission shaft (6) inside the mud pump body (4), and the pinion (7) is mounted on the transmission shaft (6); The crankshaft (3) is installed inside the mud pump body (4), and a large gear (5) is installed at one end of the crankshaft. The small gear (7) meshes with the large gear (5).

2. The power transmission mechanism of an electric-driven mud pump according to claim 1, characterized in that: The reducer (2) is a single-stage planetary reducer.

3. The power transmission mechanism of an electric-driven mud pump according to claim 1, characterized in that: The motor (1) is a permanent magnet synchronous motor.

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