High-pressure, high-flow emulsion pump station

Abstract

This utility model provides a high-pressure, high-flow emulsion pump station, which is a seven-plunger radial emulsion pump with a six-support crankshaft. It solves the problem of the limited load-bearing capacity of two-support crankshafts, allowing for a smaller overall size under high output flow and pressure, while reducing impact on the crankshaft and improving its lifespan and reliability. It includes a housing, crankshaft, connecting rod-slider mechanism, plungers, cylinder liners, valve body, suction valve, and discharge valve. The crankshaft has seven cranks; gears with opposite directions of rotation are installed between the 1st and 2nd cranks and between the 6th and 7th cranks, respectively. The gear shafts cooperating with these two gears are rotatably supported on the housing. Auxiliary journals are provided between the 2nd, 3rd, 4th, 5th, and 6th cranks of the crankshaft, rotatably connected to the inner bore of the housing via self-aligning roller bearings.

Description

Technical Field

[0001] This utility model relates to a radial emulsion plunger pump for coal mining machinery. Background Technology

[0002] A five-plunger radial emulsion pump includes a housing, a crankshaft with five cranks rotatably connected to the housing via journals at both ends, a connecting rod-slider mechanism connected to each crank, and plungers connected to the connecting rod-slider mechanism. The plungers extend into cylinder liners mounted on the housing. Corresponding to the five plungers are five sets of cylinder liners, an integral valve body, and independent suction and discharge valves. The valve body is fixed to the housing with screws. A sealed cavity is formed between the plungers, valve body, and cylinder liners. The sealed cavity communicates with the emulsion inlet cavity on the housing through the inlet of the suction valve, while the outlet of the discharge valve communicates with the pump's main outlet through a through hole in the valve body.

[0003] Its working process is as follows: Driven by an explosion-proof electric motor, the crankshaft is rotated after being reduced in speed by a coupling, gear shaft, and crankshaft. The rotational motion of the crankshaft is then converted into the linear reciprocating motion of the plunger via a connecting rod and slider mechanism. The plunger, cylinder liner, valve body, etc., form a sealed cavity. The linear reciprocating motion of the plunger causes a change in the volume of this sealed cavity, drawing in and discharging the working medium through the suction and discharge valves, thereby converting electrical energy into hydraulic energy and outputting high-pressure liquid.

[0004] Since the crankshaft is rotatably connected to the housing through the main journals at both ends, its load-bearing capacity cannot be too high considering the stress conditions of the crankshaft. Therefore, the size of the crankshaft and even the volume of the pump are relatively large. Utility Model Content

[0005] This utility model provides a high-pressure, high-flow emulsion pump station, which is a seven-plunger radial emulsion pump with a six-support crankshaft. It solves the problem of the small load-bearing capacity of two-support crankshafts, so that the overall size can be smaller under large output flow and pressure, while reducing the impact on the crankshaft and improving its service life and reliability.

[0006] The high-pressure, high-flow emulsion pump station of this utility model includes a housing, a crankshaft with cranks and rotatably connected to the housing via journals, a connecting rod-slider mechanism connected to each crank, a plunger connected to the connecting rod-slider mechanism, the plunger extending into a cylinder liner set on the housing, a valve body fixedly connected to the housing, a suction valve and a discharge valve installed on the valve body, a sealed cavity formed between the plunger, valve body, and cylinder liner, the sealed cavity communicating with the emulsion inlet cavity on the housing through the inlet of the suction valve, and the outlet of the discharge valve communicating with the pump's main outlet through a through hole in the valve body; the crankshaft has 7 cranks, with gears of opposite directions installed between the 1st and 2nd cranks and between the 6th and 7th cranks, and the gear shafts cooperating with these two gears rotatably supported on the housing; auxiliary journals are provided between the 2nd, 3rd, 4th, 5th, and 6th cranks of the crankshaft 2 and rotatably connected to the inner hole on the housing via self-aligning roller bearings.

[0007] In the aforementioned high-pressure, high-flow emulsion pump station, the center height of the crankshaft is lower than the center height of the slider.

[0008] The aforementioned high-pressure, high-flow emulsion pump station has a split housing consisting of a bottom housing and an upper housing cover. The split surface is a plane passing through the crankshaft centerline and the gear shaft centerline.

[0009] The aforementioned high-pressure, high-flow emulsion pump station has a guide column slidably installed at the center of the spring seat in the suction valve and discharge valve.

[0010] The beneficial effects of this utility model are:

[0011] This invention is based on the existing five-plunger radial emulsion pump, with the addition of two cranks, and the provision of auxiliary journals that are rotatably connected to the housing between the 2nd, 3rd, 4th, 5th and 6th cranks of the crankshaft.

[0012] Due to the increased number of crankshaft cranks and supports, the crankshaft experiences less pulsation and deflection during operation. Compared to a five-plunger radial emulsion pump with a two-support crankshaft, it delivers higher flow rate and pressure. The pump model is BRW2000 / 40 emulsion pump, with a nominal flow rate of 2000 L / min and a nominal pressure of 40 MPa.

[0013] To reduce the impact on the crankshaft, connecting rod, and crankshaft, a design with different center heights for the crankshaft and slider was adopted. The center height of the crankshaft (the height of the central axis of crankshaft rotation) was lowered, while the center height of the slider was higher than that of the crankshaft, thus reducing the size of the housing.

[0014] To facilitate the installation of the crankshaft and gear shaft, the housing is a split-type housing. During installation, the crankshaft, gears, and bearings, as well as the gear shaft and bearings, can be assembled separately, placed into the bottom housing, and finally the housing cover is closed.

[0015] Traditional suction and discharge valves use a three-jaw guide core, which is heavy and prone to wear. To reduce the size and weight of suction and discharge valves, improve operational stability, and reduce the frequency of parts replacement, a different design is adopted. A guide post is installed by drilling a hole in the center of the spring seat of the suction and discharge valve core, resulting in a higher degree of fit while reducing weight and wear. Of course, this invention can also be used with conventional suction and discharge valves.

[0016] During pump operation, the gear pairs, connecting rod and slider mechanisms, etc., inside the gearbox operate under the lubrication of the lubricating oil in the gearbox, and the temperature of the lubricating oil gradually increases. In order to cool the lubricating oil, this utility model also includes an oil pump installed on the gearbox wall. The input shaft of the oil pump is connected to the gear shaft through a coupling. The oil inlet pipe, which is connected to the oil inlet of the oil pump, extends into the lubricating oil level in the gearbox. The oil outlet pipe, which is connected to the oil outlet of the oil pump, passes through a cooler and then enters the gearbox to lubricate the bearings, bearing pairs, and connecting rod and slider mechanisms. Attached Figure Description

[0017] Figure 1 , 2 These are the front view and side view of the high-pressure, high-flow emulsion pump station, respectively.

[0018] Figure 3 This is a top view of a high-pressure, high-flow emulsion pump station (with the tank cover removed).

[0019] Figure 4 yes Figure 1 AA sectional view. Detailed Implementation

[0020] See Figure 1-4 The high-pressure, high-flow emulsion pump station shown is a seven-plunger radial emulsion pump, comprising a housing 1, a crankshaft 2 with seven cranks (artically numbered 1st crank 21, 2nd crank 22, 3rd crank 23, 4th crank 24, 5th crank 25, 6th crank 26, and 7th crank 27) rotatably connected to the housing 1 via journals, a connecting rod-slider mechanism 3 connected to the cranks, and plungers 4 connected to the connecting rod-slider mechanism. The plungers extend into cylinder liners 5 mounted on the housing 1 (corresponding to the seven plungers are seven sets of cylinder liners, an integral valve body 31, and independent suction valves 32 and discharge valves 33; the integral valve body is fixed to the housing by screws). A sealed cavity is formed between the plungers, valve body, and cylinder liners. This sealed cavity communicates with the emulsion inlet chamber 6 on the housing through the inlet of the suction valve, while the outlet of the discharge valve communicates with the pump's main outlet through a through hole in the integral valve body. Crankshaft 2 is supported on the housing. Gears with different directions of rotation, namely left-hand gear 7 and right-hand gear 8, are installed between cranks 1 and 2 and between cranks 6 and 7. Gear shaft 9, which meshes with these two gears, is rotatably supported on the housing.

[0021] Between any two adjacent cranks of the 2nd, 3rd, 4th, 5th, and 6th cranks of crankshaft 2, an auxiliary journal 29 is provided, which is rotatably connected to the inner hole on the housing via a self-aligning roller bearing 10.

[0022] The center (center axis) height of crankshaft 2 is lower than the center height of slider 35.

[0023] The housing 1 is a split housing consisting of a bottom housing 11 and an upper housing cover 12. The split surface is a plane passing through the crankshaft centerline and the gear shaft centerline.

[0024] Guide posts 34 are slidably installed at the center of the spring seats in both the suction valve and the discharge valve.

[0025] The gear oil pump is mounted on the housing wall. The pump's input shaft is connected to the gear shaft via a coupling. An oil inlet pipe, connected to the pump's inlet, extends below the lubricating oil level inside the housing. An oil outlet pipe, connected to the pump's outlet, passes through a cooler and enters the housing. The outlet pipe connects to two pump ports located on the housing. One pump port is located at the crankshaft center bore, connecting to the crankshaft, bearing connections, and connecting rod / slider mechanism; the other pump port is located at the gear shaft bearing.

[0026] The gear oil pump, mounted on the gear shaft end, rotates with the gear shaft, drawing hot lubricating oil from the crankcase. After being cooled by emulsion in the cooler, the oil is sprayed into the crankshaft to lubricate the bearings, bearing pairs, and connecting rod slide mechanism, forming a lubricating oil circulation. The forced circulation cooling of the lubricating oil by the cooler and the spray lubrication significantly reduce the oil temperature, further improving the lubrication effect on the moving parts.

[0027] The embodiments described above are merely preferred embodiments of the present invention and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutions that can be conceived by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A high-pressure, high-flow emulsion pump station, comprising a housing, a crankshaft with cranks rotatably connected to the housing via journals, a connecting rod-slider mechanism connected to each crank, a plunger connected to the connecting rod-slider mechanism, the plunger extending into a cylinder liner mounted on the housing, a valve body fixedly connected to the housing, a suction valve and a discharge valve mounted on the valve body, a sealed cavity formed between the plunger, valve body, and cylinder liner, the sealed cavity communicating with the emulsion inlet cavity on the housing through the inlet of the suction valve, and the outlet of the discharge valve communicating with the pump's main outlet through a through hole in the valve body; characterized in that: The crankshaft has 7 cranks. Gears with opposite directions of rotation are installed between the 1st and 2nd cranks and between the 6th and 7th cranks. The gear shaft that meshes with the two gears is rotatably supported on the housing. A secondary journal is provided between the 2nd, 3rd, 4th, 5th and 6th cranks of the crankshaft (2) and is rotatably connected to the inner hole on the housing through a self-aligning roller bearing.

2. The high-pressure, high-flow emulsion pump station as described in claim 1, characterized in that: The center height of the crankshaft is lower than the center height of the slider.

3. The high-pressure, high-flow emulsion pump station as described in claim 1, characterized in that: The housing is a split type consisting of a bottom housing and an upper cover, with the split surface being a plane passing through the crankshaft centerline and the gear shaft centerline.

4. A high-pressure, high-flow emulsion pump station as described in claim 1, characterized in that: A guide post is slidably installed at the center of the spring seat in the suction valve and the discharge valve.

Images