Valve flow distribution type miniature plunger pump

Abstract

The invention relates to the technical field of drilling and completion equipment in the oil and gas drilling industry, in particular to a valve flow distribution type miniature plunger pump which comprises a shell, a cylinder body, a plunger and a swash plate shaft, the other end of the swash plate shaft is rotationally connected with the cylinder body through a fixing column, and a single-face swash plate is fixedly connected to the surface of the swash plate shaft. The plunger is fixedly connected with a limiting disc, the limiting disc is elastically connected with the cylinder body, the surface of the cylinder body is fixedly connected with a plurality of oil suction one-way flow distribution valves, the oil suction one-way flow distribution valves are connected with the sliding cavity, the limiting disc makes contact with the thrust bearing, and the inner wall of the cylinder body is slidably connected with an oil discharge one-way flow distribution valve. The cylinder body is fixedly connected with an oil outlet joint; the device has the beneficial effects that the swash plate shaft rotates to drive the single-sided swash plate to rotate, and the limiting plate continuously slides up and down by changing the direction of an inclined plane, so that the pressure in the sliding cavity is continuously changed, and oil is continuously absorbed and pressed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling and completion equipment in the oil and gas drilling industry, in particular to a valve flow distribution type micro plunger pump. BACKGROUND

[0002] With the accelerated development of the national economy, energy demand is growing rapidly. Under the background of the continuous improvement of the intelligent level of oil and gas drilling and completion technology, intelligent drilling and completion equipment is emerging. The performance of the key core components of such equipment with high power-to-weight ratio needs to be optimized or researched and developed.

[0003] Among them, the plunger pump is an important device of the hydraulic system in the drilling and completion equipment. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working cavity to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation

[0004] Currently, the existing micro oil pumps on the market generally have the defect of internal temperature rise during mechanical operation, which reduces the fatigue life. Therefore, the present application proposes a valve flow distribution type micro plunger pump to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a valve flow distribution type micro plunger pump to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a valve flow distribution type micro plunger pump, comprising: a housing, a cylinder, a plunger and a swash plate shaft, one end of the housing is fixedly connected with the cylinder, the other end is fixedly connected with a motor connector, the swash plate shaft is rotatably connected with the housing, the surface of the housing is provided with a plurality of oil immersion ports, the other end of the swash plate shaft is rotatably connected with the cylinder through a fixed column, the surface of the swash plate shaft is fixedly connected with a single-sided swash plate, the inclined surface of the single-sided swash plate is rotatably connected with a thrust bearing, a plurality of plungers are slidably connected with the cylinder, the plunger is fixedly connected with a limiting disc, the limiting disc is elastically connected with the cylinder, the surface of the cylinder is fixedly connected with a plurality of oil suction one-way flow distribution valves, the oil suction one-way flow distribution valves are connected with a sliding cavity, the limiting disc is in contact with the thrust bearing, the inner wall of the cylinder is slidably connected with an oil discharge one-way flow distribution valve, the cylinder is fixedly connected with an oil outlet connector, the interiors of the oil outlet connector, the oil discharge one-way flow distribution valve, the sliding cavity and the oil suction one-way flow distribution valve are through.

[0007] Preferably, the upper end of the oil outlet joint is provided with a pressure oil discharge port, the lower end of the oil outlet joint is provided with a pressure oil cavity, the upper surface of the oil outlet joint is provided with an annular groove, the groove is sleeved with a first sealing ring and an elastic retainer one, the upper end of the first sealing ring and the elastic retainer one are in contact, the lower surface of the oil outlet joint is sleeved with a second sealing ring and an elastic retainer two, the elastic retainer two is in contact with the upper surface of the second sealing ring, the oil outlet joint is fixedly connected with the inner wall of the upper end of the cylinder body, and the second sealing ring and the elastic retainer two are in close contact with the inner wall of the upper end of the cylinder body.

[0008] Preferably, the lower end of the cylinder body is provided with a plurality of buffer grooves, the upper end of the buffer groove is communicated with the sliding cavity, the other end of the sliding cavity is in contact with the oil discharge one-way flow valve, and the other end of the oil discharge one-way flow valve is in contact with and communicated with the pressure oil cavity.

[0009] Preferably, the surface of the cylinder body is fixedly connected with a filter screen, the input ends of the plurality of oil suction one-way flow valves are in contact with the filter screen, the output ends of the oil suction one-way flow valves are communicated with the sliding cavities, and the lower end of the cylinder body is fixedly connected with the shell.

[0010] Preferably, the upper end of the swash plate shaft is fixedly connected with a fixed column, the other end of the fixed column is rotatably connected with the lower end of the cylinder body, the lower end of the swash plate shaft sequentially penetrates the shell and the motor joint, and the swash plate shaft is rotatably connected with the shell and the motor joint.

[0011] Preferably, the upper surface of the swash plate shaft penetrates the single-sided swash plate and is fixedly connected therewith, the lower surface of the swash plate shaft is connected with a deep groove ball bearing two, the inner wall of the deep groove ball bearing two is fixedly connected with the surface of the swash plate shaft, and the surface of the deep groove ball bearing two is fixedly connected with the shell.

[0012] Preferably, the inner walls of the plurality of sliding cavities are sealed and in sliding connection with plungers, the lower end of each plunger is fixedly connected with a limiting disc, the surface of the limiting disc is fixedly connected with a spring, and the other end of the spring is fixedly connected with the inner wall of the buffer groove.

[0013] Preferably, the upper end of the shell is provided with a rotating cavity, a plurality of oil immersion ports are uniformly arranged on the upper surface of the shell, the oil immersion ports are communicated with the rotating cavity, and the inner wall of the lower end of the shell is fixedly connected with the surface of the motor joint.

[0014] Preferably, the upper and lower ends of the single-sided swash plate are rotatably connected with thrust bearings, the thrust bearings at the lower end are sleeved on the surface of the swash plate shaft, and the lower end of the thrust bearing is rotatably connected with the lower end of the rotating cavity.

[0015] Preferably, the surface of the fixed column is connected with a deep groove ball bearing one, the inner wall of the deep groove ball bearing one is fixedly connected with the fixed column, the surface of the deep groove ball bearing one is rotatably connected with the thrust bearing at the upper end of the single-sided swash plate, the lower end of the thrust bearing is in contact with the inclined surface of the single-sided swash plate, and the upper end of the thrust bearing is in close contact with a plurality of limiting discs.

[0016] Compared with the prior art, the present application has the beneficial effects that: by rotating the single-sided swash plate with the swash plate shaft, the limiting disc is continuously slid up and down by changing the direction of the inclined surface, thereby changing the pressure in the sliding cavity, continuously repeating the process of oil absorption and oil pressing, and realizing the integrated self-oil absorption function without independent oil absorption pipeline by directly placing the whole in the oil environment and using the pressure difference principle, and relying on the heat conduction characteristics of the oil to construct an efficient heat export path inside the pump body, improving the heat conduction efficiency, greatly reducing the operating temperature rise of the oil pump, effectively delaying the aging rate of the hydraulic pump sealing assembly and mechanical components by controlling the thermal load, realizing the extension protection of the component life and enhancing the equipment operation reliability and durability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional schematic view of the overall structure of the present application;

[0018] Figure 2 is a schematic view of the internal structure of the overall structure of the present application;

[0019] Figure 3 is a side view of the swash plate shaft of the present application;

[0020] Figure 4 is a side view of the fixed column of the present application;

[0021] Figure 5 is a cross-sectional view of the oil outlet joint of the present application;

[0022] Figure 6 is a cross-sectional view of the cylinder body of the present application.

[0023] In the figure: 1, pressure oil outlet; 2, oil outlet joint; 3, first sealing ring; 4, elastic retainer ring one; 5, elastic retainer ring two; 6, second sealing ring; 7, filter screen; 8, pressure oil cavity; 9, oil discharge one-way flow valve; 10, cylinder body; 11, plunger; 12, spring; 13, deep groove ball bearing one; 14, thrust bearing; 15, housing; 16, deep groove ball bearing two; 17, motor joint; 18, swash plate shaft; 19, oil immersion port; 20, oil absorption one-way flow valve; 21, sliding cavity; 22, buffer groove; 23, rotating cavity; 24, single-sided swash plate; 25, fixed column; 26, limiting disc. DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions of the present application clear, complete and the advantages more clear and apparent, the embodiments of the present application are further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, rather than all the embodiments, and are only used to explain the embodiments of the present application, and are not used to limit the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1 to 6 The present application provides a technical solution: a valve flow distribution type micro-plunger pump, the valve flow distribution type micro-plunger pump comprises: a shell 15, a cylinder body 10, a plunger 11 and a swash plate shaft 18, the upper end of the oil outlet joint 2 is provided with a pressure oil outlet 1, the liquid is discharged through the pressure oil outlet 1, the lower end of the oil outlet joint 2 is provided with a pressure oil cavity 8, the pressure oil cavity 8 is conical as a whole, so that the liquid can be discharged concentratedly, the upper surface of the oil outlet joint 2 is provided with an annular groove, the first sealing ring 3 and the elastic retainer ring 1 4 are sleeved in the groove, the oil outlet joint 2 can be connected with other equipment tightly and sealed through the first sealing ring 3 and the elastic retainer ring 1 4, the upper end of the first sealing ring 3 and the elastic retainer ring 1 4 is in contact, the lower surface of the oil outlet joint 2 is sleeved with the second sealing ring 6 and the elastic retainer ring 2 5, the upper surface of the elastic retainer ring 2 5 and the second sealing ring 6 is in contact, the pressure oil cavity 8 can be sealed through the elastic retainer ring 2 5 and the second sealing ring 6, avoiding leakage at the connection, the oil outlet joint 2 is fixedly connected with the inner wall of the upper end of the cylinder body 10, the second sealing ring 6 and the elastic retainer ring 2 5 are in close contact with the inner wall of the upper end of the cylinder body 10, at this time, when the oil outlet joint 2 is connected with other equipment, it can stably supply oil to the equipment.

[0026] When the oil outlet joint 2 is connected with other equipment, the connection between the oil outlet joint 2 and the equipment can be sealed through the elastic retainer ring 1 4 and the first sealing ring 3, the pressure oil cavity 8 can be kept sealed and stable through the elastic retainer ring 2 5 and the second sealing ring 6.

[0027] The lower end of the cylinder 10 is provided with a plurality of buffer grooves 22, the upper end of the buffer groove 22 is in communication with the sliding cavity 21, the other end of the sliding cavity 21 is in contact with the oil discharge one-way flow valve 9, the oil discharge one-way flow valve 9 is a one-way valve, the flow direction is from the lower end to the upper end, the other end of the oil discharge one-way flow valve 9 is in contact with the pressure oil cavity 8 and is in communication, the surface of the cylinder 10 is fixedly connected with the filter screen 7, the oil entering the device can be filtered through the filter screen 7, a plurality of oil suction one-way flow valves 20 are uniformly arranged on the surface of the cylinder 10, the oil suction one-way flow valve 20 is a one-way valve, the flow direction is from one end close to the filter screen 7 to the other end, the input end is in contact with the filter screen 7, the output end of the oil suction one-way flow valve 20 is in communication with the sliding cavity 21, at this time the oil from the outside can pass through the filter screen 7 and enter the sliding cavity 21 through the oil suction one-way flow valve 20, the lower end of the cylinder 10 is fixedly connected with the shell 15, the inner wall of the plurality of sliding cavities 21 is sealingly connected with the plunger 11, the sliding of the plunger 11 can push the liquid in the sliding cavity 21 to flow, the lower end of the plunger 11 is fixedly connected with the limiting disc 26, the surface of the limiting disc 26 is fixedly connected with the spring 12, the other end of the spring 12 is fixedly connected with the inner wall of the buffer groove 22, the spring 12 facilitates the rapid sliding of the plunger 11.

[0028] When the plunger 11 moves out of the sliding cavity 21, the volume of the sealed working cavity in the sliding cavity 21 increases, a local vacuum is generated, at this time the oil suction one-way flow valve 20 is opened and the oil discharge one-way flow valve 9 is closed, the oil is sucked in through the oil suction one-way flow valve 20 on the surface of the cylinder 10, the hydraulic oil enters the sliding cavity 21 after passing through the filter screen 7 and the oil suction one-way flow valve 20 in turn, when the plunger 11 moves gradually into the sliding cavity 21 and retracts, the volume of the sealed working cavity of the sliding cavity 21 continuously decreases, at this time the oil suction one-way flow valve 20 is closed and the oil discharge one-way flow valve 9 is opened, the hydraulic oil can be moved from the sliding cavity 21 and discharged into the pressure oil cavity 8 through the oil discharge one-way flow valve 9, then the pressure oil is guided to the pressure oil discharge port 1.

[0029] The upper end of the swash plate shaft 18 is fixedly connected with the fixed column 25, the other end of the fixed column 25 is rotatably connected with the lower end of the cylinder body 10, at this time, the position of the swash plate shaft 18 can be fixed, the lower end of the swash plate shaft 18 passes through the shell 15 and the motor connector 17 in sequence, the swash plate shaft 18 is rotatably connected with the shell 15 and the motor connector 17, the swash plate shaft 18 is fixedly connected with the output end of the motor through the motor connector 17, the upper surface of the swash plate shaft 18 passes through the single-sided swash plate 24 and is fixedly connected with the same, the single-sided swash plate 24 rotates with the swash plate shaft 18, the lower surface of the swash plate shaft 18 is connected with the deep groove ball bearing two 16, the inner wall of the deep groove ball bearing two 16 is fixedly connected with the surface of the swash plate shaft 18, the surface thereof is fixedly connected with the shell 15, the rotating resistance of the swash plate shaft 18 can be reduced through the deep groove ball bearing two 16, the upper end of the shell 15 is provided with a rotating cavity 23, a plurality of oil immersion ports 19 are uniformly arranged on the upper surface of the shell 15, the oil immersion ports 19 are communicated with the rotating cavity 23, the oil immersion ports 19 are convenient for the entry of external oil, so that the whole rotating part is lubricated, the inner wall of the lower end of the shell 15 is fixedly connected with the surface of the motor connector 17.

[0030] The swash plate shaft 18 is connected with the output end of the motor, and is fixed and protected through the motor connector 17, at this time, the single-sided swash plate 24 can be driven to rotate through the swash plate shaft 18.

[0031] The upper and lower ends of the single-sided swash plate 24 are rotatably connected with the thrust bearings 14, the lower end of the thrust bearing 14 is sleeved on the surface of the swash plate shaft 18, and the lower end of the thrust bearing 14 is rotatably connected with the lower end of the rotating cavity 23, the lower end of the single-sided swash plate 24 can be supported through the thrust bearing 14, the surface of the fixed column 25 is connected with the deep groove ball bearing one 13, the inner wall of the deep groove ball bearing one 13 is fixedly connected with the fixed column 25, the swash plate shaft 18 can rotate more smoothly through the deep groove ball bearing one 13, the surface of the deep groove ball bearing one 13 is rotatably connected with the thrust bearing 14 located at the upper end of the single-sided swash plate 24, the lower end of the thrust bearing 14 is in contact with the inclined surface of the single-sided swash plate 24, and the upper end of the thrust bearing 14 is in close contact with a plurality of limiting discs 26.

[0032] When the swash plate shaft 18 rotates, the single-sided swash plate 24 rotates, due to the fact that the plunger 11 is pressed to the thrust bearing 14 in contact with the inclined surface under the action of the spring 12, when the external motor drives the swash plate shaft 18 to rotate, the single-sided swash plate 24 rotates one round, each plunger 11 reciprocates along the sliding cavity 21 once, and oil suction and oil pressing are completed once, the swash plate shaft 18 continuously rotates under the driving of the motor, and oil suction and oil pressing can be continuously performed.

[0033] When the device works, the whole is placed in the oil, then the swash plate shaft 18 is driven to rotate by the external motor, at this time, the single-sided swash plate 24 rotates, the limiting disc 26 slides up and down under the action of the spring 12 by changing the direction of the inclined surface, in the process, the pressure in the sliding cavity 21 changes constantly, so as to adjust the opening and closing state of the oil discharge one-way flow valve 9 and the oil suction one-way flow valve 20, and then constantly repeat the process of oil suction and oil pressure, through the whole is directly placed in the oil environment, the integrated self-suction oil function is realized by using the pressure difference principle without independent oil suction pipeline, the traditional oil suction pipeline is omitted to simplify the system structure and reduce the fluid resistance and leakage risk, at the same time, relying on the heat conduction characteristics of the oil, the efficient export path of the heat in the pump body is constructed, the heat conduction efficiency is significantly improved to greatly reduce the operating temperature rise of the oil pump, the aging rate of the hydraulic pump sealing assembly and mechanical parts is effectively delayed by controlling the thermal load, the life protection of the parts is realized, and the operation reliability and durability of the equipment are enhanced.

[0034] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A valve porting micro-piston pump characterized by: The valve flow distribution type micro plunger pump comprises a shell (15), a cylinder body (10), a plunger (11) and a swash plate shaft (18), one end of the shell (15) is fixedly connected with the cylinder body (10), the other end is fixedly connected with a motor connector (17), the swash plate shaft (18) is rotatably connected with the shell (15), a plurality of oil immersion ports (19) are formed in the surface of the shell (15), the other end of the swash plate shaft (18) is rotatably connected with the cylinder body (10) through a fixing column (25), a single-sided swash plate (24) is fixedly connected with the surface of the swash plate shaft (18), the inclined surface of the single-sided swash plate (24) is rotatably connected with a thrust bearing (14), a plurality of plungers (11) are slidably connected with the cylinder body (10), the plunger (11) is fixedly connected with a limiting disc (26), the limiting disc (26) is elastically connected with the cylinder body (10), a plurality of oil suction one-way flow distribution valves (20) are fixedly connected with the surface of the cylinder body (10), the oil suction one-way flow distribution valves (20) are connected with sliding cavities (21), the limiting disc (26) is in contact with the thrust bearing (14), the inner wall of the cylinder body (10) is slidably connected with an oil discharge one-way flow distribution valve (9), the cylinder body (10) is fixedly connected with an oil outlet connector (2), the interiors of the oil outlet connector (2), the oil discharge one-way flow distribution valve (9), the sliding cavity (21) and the oil suction one-way flow distribution valve (20) are through.

2. A valve porting type micro-piston pump according to claim 1, characterized in that: The upper end of the oil outlet connector (2) is provided with a pressure oil discharge port (1), the lower end of the oil outlet connector (2) is provided with a pressure oil cavity (8), the upper surface of the oil outlet connector (2) is provided with an annular groove, the first sealing ring (3) and the elastic retainer ring (4) are sleeved in the groove, the upper end of the first sealing ring (3) and the elastic retainer ring (4) is in contact, the lower surface of the oil outlet connector (2) is sleeved with the second sealing ring (6) and the elastic retainer ring (5), the upper surface of the elastic retainer ring (5) and the second sealing ring (6) is in contact, the oil outlet connector (2) is fixedly connected with the inner wall of the upper end of the cylinder body (10), the second sealing ring (6) and the elastic retainer ring (5) are in close contact with the inner wall of the upper end of the cylinder body (10).

3. A valve porting type micro-piston pump according to claim 1, characterized in that: The lower end of the cylinder body (10) is provided with a plurality of buffer grooves (22), the upper end of the buffer groove (22) is through with the sliding cavity (21), the other end of the sliding cavity (21) is in contact with the oil discharge one-way flow distribution valve (9), the other end of the oil discharge one-way flow distribution valve (9) is in contact with the pressure oil cavity (8) and is through.

4. A valve porting type micro-piston pump according to claim 1, characterized in that: The surface of the cylinder body (10) is fixedly connected with a filter screen (7), the input end of the plurality of oil suction one-way flow distribution valves (20) is in contact with the filter screen (7), the output end of the oil suction one-way flow distribution valve (20) is through with the sliding cavity (21), the lower end of the cylinder body (10) is fixedly connected with the shell (15).

5. A valve porting type micro-piston pump according to claim 1, characterized in that: The upper end of the swash plate shaft (18) is fixedly connected with the fixing column (25), the other end of the fixing column (25) is rotatably connected with the lower end of the cylinder body (10), the lower end of the swash plate shaft (18) sequentially passes through the shell (15) and the motor connector (17), the swash plate shaft (18) is rotatably connected with the shell (15) and the motor connector (17).

6. A valve porting type micro-piston pump according to claim 1, characterized in that: The upper surface of the swash plate shaft (18) passes through and is fixedly connected with the single-sided swash plate (24), the lower surface of the swash plate shaft (18) is connected with the deep groove ball bearing two (16), the inner wall of the deep groove ball bearing two (16) is fixedly connected with the surface of the swash plate shaft (18), and the surface thereof is fixedly connected with the shell (15).

7. A valve porting type micro-piston pump according to claim 1, characterized in that: The inner wall of the plurality of sliding cavities (21) is sealingly and slidingly connected with the plunger (11), the lower end of the plunger (11) is fixedly connected with the limiting disc (26), the surface of the limiting disc (26) is fixedly connected with the spring (12), and the other end of the spring (12) is fixedly connected with the inner wall of the buffer groove (22).

8. A valve porting type micro-piston pump according to claim 1, characterized in that: The upper end of the shell (15) is provided with a rotating cavity (23), a plurality of oil immersion ports (19) are uniformly arranged on the upper surface of the shell (15), the oil immersion ports (19) are communicated with the rotating cavity (23), and the inner wall of the lower end of the shell (15) is fixedly connected with the surface of the motor connector (17).

9. A valve porting type micro-piston pump according to claim 1, characterized in that: The upper and lower ends of the single-sided swash plate (24) are rotatably connected with the thrust bearing (14), the lower end of the thrust bearing (14) is sleeved on the surface of the swash plate shaft (18), and the lower end of the thrust bearing (14) is rotatably connected with the lower end of the rotating cavity (23).

10. A valve porting type micro-piston pump according to claim 1, characterized in that: The surface of the fixed column (25) is connected with the deep groove ball bearing one (13), the inner wall of the deep groove ball bearing one (13) is fixedly connected with the fixed column (25), the surface of the deep groove ball bearing one (13) is rotatably connected with the thrust bearing (14) located at the upper end of the single-sided swash plate (24), the lower end of the thrust bearing (14) is in contact with the inclined surface of the single-sided swash plate (24), and the upper end of the thrust bearing (14) is in close contact with a plurality of limiting discs (26).

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