Oil injection device for pressure rising of oil pump

Abstract

The utility model discloses an oil injection device for oil pump pressure rising, which relates to the field of hydraulic oil pumps and comprises a first oil pump, a second oil pump and two communicating pipes, an exhaust mechanism is mounted at the top of the first oil pump and the top of the second oil pump, and the exhaust mechanism comprises two three-way pipes. Oil outlet pipes are connected and mounted between the two three-way pipes and oil outlets of the first oil pump and the second oil pump correspondingly, a needle valve is mounted between the two communicating pipes, oil conveying pipes are mounted at the top ends of the two three-way pipes correspondingly, and one-way valves are mounted at the tops of the oil conveying pipes; the same oil collecting pipe is installed between the top ends of the two one-way valves, an oil discharging pipe is welded to the middle of the oil collecting pipe, and the needle valve is connected with the two three-way pipes through communicating pipes; air in the oil pump can be exhausted, oil is injected to lubricate a gear before the second oil pump is started, gear abrasion is relieved, meanwhile, impurities in oil can be filtered out, and a filter cover is convenient to disassemble, assemble and clean.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic oil pumps, in particular to an oil injection device for starting pressure in an oil pump. Background Art

[0002] The coal mill uses hydraulic loading to grind coal powder. The hydraulic oil pump is a key component in the hydraulic system. It is mainly used to provide high-pressure oil for the hydraulic loading system to drive the actuators to complete specific tasks. This solution specifically involves an oil injection device for starting the oil pump.

[0003] When the existing oil injection device for oil pump pressure start-up is in use, after the oil pump stops operating, the oil in the pipe section between the oil pump and the outlet one-way valve is easy to flow back to the oil tank, causing air accumulation in the pipe section, resulting in the inability to increase the pressure when the oil pump is started. The operation of only one pump affects the reliability and stability of the equipment operation. In addition, the oil quality particle size is uneven, causing the oil pump gears and floating bearings to wear and produce gaps, making it impossible to form an effective seal. Utility Model Content

[0004] The main purpose of the utility model is to provide an oil injection device for starting pressure of an oil pump, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An oil injection device for oil pump pressure starting, comprising a first oil pump, a second oil pump and two connecting pipes, an exhaust mechanism is installed on the top of the first oil pump and the second oil pump, the exhaust mechanism comprises two tees, the two tees are respectively connected to the oil outlets of the first oil pump and the second oil pump, an oil outlet pipe is installed between the two tees, a needle valve is installed between the two connecting pipes, an oil delivery pipe is installed on the top of the two tees, a one-way valve is installed on the top of the oil delivery pipe, the same oil collecting pipe is installed between the tops of the two one-way valves, and an oil drain pipe is welded to the middle of the oil collecting pipe.

[0007] As a further solution of the present invention, the needle valve is connected to the two three-way pipes via a connecting pipe, and the two connecting pipes are interconnected via the needle valve.

[0008] As a further solution of the present invention, the bottom ends of the two oil outlet pipes are respectively connected to the oil outlets of the first oil pump and the second oil pump, and the two tee pipes are symmetrically arranged on both sides.

[0009] As a further solution of the present invention, the front surface of the oil collecting pipe is arranged in a "冂" shape, and the one-way valve is used for the one-way flow of oil.

[0010] As a further solution of the present utility model, filtering components are installed at the bottoms of the first oil pump and the second oil pump. The filtering component includes a filter seat and a stop valve. An oil inlet pipe is connected and installed at the bottom of the filter seat. A cavity is formed inside the filter seat. A first thread groove is arranged outside the filter seat. A second thread groove is arranged at the top end of the oil inlet pipe. A filter cylinder is connected to the outside of the first thread groove. A filter cover is connected to the outside of the second thread groove.

[0011] As a further solution of the present utility model, the filter cylinder is threadedly connected to the first thread groove, and the cavity is in communication with the inside of the filter cylinder.

[0012] As a further solution of the present utility model, the top end of the oil inlet pipe penetrates inside the filter seat, and the filter cover is threadedly connected to the second thread groove.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By arranging an exhaust mechanism, when the first oil pump is started and the needle valve is opened, the two communicating pipes are interconnected, so that the air inside can be discharged, eliminating the problem that the oil pump fails to build pressure. At the same time, through the needle valve, part of the oil liquid is injected into the second oil pump, which can lubricate the gear by pre-injecting oil before the second oil pump is started, prevent dry grinding, avoid the occurrence of cavitation phenomenon, reduce gear wear, and extend the service life.

[0015] By arranging a filtering component, the oil liquid filters out impurities through the filter cover, and the filtered oil liquid enters the cavity for transportation, facilitating the filtration of impurities in the oil liquid. Through the threaded connection of the filter cylinder and the filter cover and closing the stop valve, it is convenient to disassemble, install and clean the filter cover. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of an oil pump pressure boosting oil injection device of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the exhaust mechanism in an oil pump pressure boosting oil injection device of the present utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the filtering component in an oil pump pressure boosting oil injection device of the present utility model;

[0019] Figure 4 It is the overall front view of an oil pump pressure boosting oil injection device of the present utility model.

[0020] In the figure: 1. First oil pump; 2. Second oil pump; 3. Exhaust mechanism; 4. Filter assembly; 5. T-piece; 6. Oil outlet pipe; 7. Connecting pipe; 8. Needle valve; 9. Oil delivery pipe; 10. One-way valve; 11. Oil collecting pipe; 12. Oil drain pipe; 13. Filter seat; 14. Stop valve; 15. Oil inlet pipe; 16. Cavity; 17. First screw groove; 18. Second screw groove; 19. Filter cartridge; 20. Filter cover. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1-4 As shown, an oil injection device for oil pump pressure starting includes a first oil pump 1, a second oil pump 2 and two connecting pipes 7. An exhaust mechanism 3 is installed on the top of the first oil pump 1 and the second oil pump 2. The exhaust mechanism 3 includes two T-tubes 5. The two T-tubes 5 are respectively connected to the oil outlets of the first oil pump 1 and the second oil pump 2, and an oil outlet pipe 6 is installed between them. A needle valve 8 is installed between the two connecting pipes 7. An oil delivery pipe 9 is installed on the top of each of the two T-tubes 5. A one-way valve 10 is installed on the top of the oil delivery pipe 9. The same oil collecting pipe 11 is installed between the tops of the two one-way valves 10, and an oil drain pipe 12 is welded to the middle of the oil collecting pipe 11.

[0023] In this embodiment, the needle valve 8 is connected to the two three-way pipes 5 through a connecting pipe 7, and the two connecting pipes 7 are interconnected through the needle valve 8. The opening and closing of the needle valve 8 makes the two three-way pipes 5 interconnected and closed, and the internal air is discharged.

[0024] In this embodiment, the bottom ends of the two oil outlet pipes 6 are respectively connected to the oil outlets of the first oil pump 1 and the second oil pump 2, and the two three-way pipes 5 are symmetrically arranged on both sides. The second oil pump 2 is used to discharge the air in the oil outlet pipe 6 in the first oil pump 1, and transport part of the oil to the second oil pump 2 through the first oil pump 1 to lubricate the gears.

[0025] In this embodiment, the front view of the oil collecting pipe 11 is arranged in a "冂" shape, and the one-way valve 10 is used for the one-way flow of oil. The oil is transported to the oil collecting pipe 11 through the one-way valve 10 for centralized transportation, and the one-way valve 10 prevents the oil from flowing back.

[0026] In this embodiment, filter components 4 are installed at the bottoms of the first oil pump 1 and the second oil pump 2. The filter component 4 includes a filter base 13 and a stop valve 14. An oil inlet pipe 15 is connected and installed at the bottom of the filter base 13. A cavity 16 is formed inside the filter base 13. A first thread groove 17 is provided outside the filter base 13. A second thread groove 18 is provided at the top end of the oil inlet pipe 15. A filter cartridge 19 is connected to the outside of the first thread groove 17. A filter cover 20 is connected to the outside of the second thread groove 18. The filter cover 20 filters impurities in the oil fluid, and the filtered oil fluid enters the oil pump through the cavity 16 and the stop valve 14.

[0027] In this embodiment, the filter cartridge 19 is threadedly connected to the first thread groove 17, and the cavity 16 is interconnected with the inside of the filter cartridge 19. The filtered oil fluid enters the filter cartridge 19 and the cavity 16. The stop valve 14 is used for opening and closing at the oil inlet of the oil pump.

[0028] In this embodiment, the top end of the oil inlet pipe 15 penetrates inside the filter base 13, and the filter cover 20 is threadedly connected to the second thread groove 18. Due to the threaded connection of the filter cover 20, it is convenient to disassemble and assemble the filter cover 20 for cleaning.

[0029] It should be noted that the present utility model is an oil injection device for boosting pressure of an oil pump. When in use, the bottom ends of the two oil inlet pipes 15 are connected to a hydraulic oil station. By starting the first oil pump 1 and the second oil pump 2, the oil fluid is suctioned and conveyed. When the oil fluid enters the filter base 13, the filter cover 20 filters the impurities. The filtered oil fluid enters the cavity 16 and is conveyed through the stop valve 14, the first oil pump 1, and the second oil pump 2. When not in use for a long time, air enters the oil pump. When using again, by opening the needle valve 8 and starting the first oil pump 1, the air accumulated in the oil pump gear and the oil outlet pipe 6 inside the first oil pump 1 is discharged through the connecting pipe 7, and part of the oil fluid is injected into the second oil pump 2 through the needle valve 8 to lubricate the oil pump gear before the second oil pump 2 is started. The stop valve 14 is closed and two one-way valves 10 are used to prevent oil from flowing back, and the oil fluid is conveyed out through the collecting pipe 11.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An oil injection device for oil pump pressure starting, comprising a first oil pump (1), a second oil pump (2) and two connecting pipes (7), wherein an exhaust mechanism (3) is installed on the top of the first oil pump (1) and the second oil pump (2), and characterized in that: The exhaust mechanism (3) includes two three-way pipes (5). An oil outlet pipe (6) is connected and installed between each of the two three-way pipes (5) and the oil outlets of the first oil pump (1) and the second oil pump (2). A needle valve (8) is installed between the two connecting pipes (7). Oil delivery pipes (9) are installed at the tops of the two three-way pipes (5). A check valve (10) is installed at the top of the oil delivery pipe (9). The tops of the two check valves (10) are connected to the same oil collecting pipe (11). An oil discharge pipe (12) is welded to the middle of the oil collecting pipe (11).

2. The oil injection device for starting oil pump pressure according to claim 1, characterized in that: The needle valve (8) is connected to the two three-way pipes (5) through connecting pipes (7), and the two connecting pipes (7) communicate with each other through the needle valve (8).

3. The oil injection device for starting oil pump pressure according to claim 1, characterized in that: The bottoms of the two oil outlet pipes (6) are respectively connected to the oil outlets of the first oil pump (1) and the second oil pump (2), and the two three-way pipes (5) are symmetrically arranged on both sides.

4. The oil injection device for starting oil pump pressure according to claim 1, characterized in that: The front view of the oil collecting pipe (11) is arranged in a "冂" shape, and the check valve (10) is used for the one-way flow of oil.

5. The oil injection device for starting oil pump pressure according to claim 1, characterized in that: Filter components (4) are installed at the bottoms of the first oil pump (1) and the second oil pump (2). The filter component (4) includes a filter base (13) and a stop valve (14). An oil inlet pipe (15) is connected and installed at the bottom of the filter base (13). A cavity (16) is formed inside the filter base (13). A first thread groove (17) is arranged outside the filter base (13). A second thread groove (18) is arranged at the top of the oil inlet pipe (15). A filter cartridge (19) is connected to the outside of the first thread groove (17), and a filter cover (20) is connected to the outside of the second thread groove (18).

6. The oil injection device for starting oil pump pressure according to claim 5, characterized in that: The filter cartridge (19) is threadedly connected to the first thread groove (17), and the cavity (16) is interconnected with the inside of the filter cartridge (19).

7. The oil injection device for starting oil pump pressure according to claim 5, characterized in that: The top of the oil inlet pipe (15) penetrates inside the filter base (13), and the filter cover (20) is threadedly connected to the second thread groove (18).

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