Vacuum pump
The vacuum pump design that forms negative pressure through repeated movement of the cylinder piston has solved the problems of high speed and high failure rate in existing equipment and the inability to eliminate dust, achieving the negative pressure effect of low speed operation and cleaning, reducing equipment cost and failure rate.
Patent Information
- Application Number
- CN202422412420.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-08
AI Technical Summary
In the existing agricultural gas suction seeding equipment, the fan speed is high, the failure rate is high, and it is easy to damage, and the vacuum pump is expensive and cannot effectively remove dust.
The vacuum pump design is designed with repeated movement of the cylinder piston to form a negative pressure. The cylinder piston is connected by a crankshaft, combined with the filter valve and suction pipe, and the low-speed operation is achieved and dust is filtered through the filter element.
It realizes low-speed operation, reduces failure rate and cost, forms greater negative pressure, is suitable for hydraulic systems, and keeps the cylinder cavity clean, which can effectively remove dust.
Smart Images
Figure CN223075673U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vacuum pumps for agricultural machinery sowing equipment, and particularly relates to a vacuum pump. Background Art
[0002] Currently, for agricultural air-suction sowing, a blower is used to generate negative pressure to achieve vacuum sowing. This requires a high rotational speed, generally between 3500 and 5000 revolutions per minute. Electric blowers have a faster rotational speed, generally between 10000 and 23000 revolutions per minute, and have a high failure rate and are prone to damage. Existing vacuum pumps are costly and cannot exclude dust, making them prone to damage. Therefore, a vacuum pump with a low rotational speed and capable of dust removal is needed. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a vacuum pump that uses a cylinder piston to repeatedly move to form negative pressure.
[0004] The technical solution adopted is:
[0005] A vacuum pump includes a box body, a power source, a crankshaft, a plurality of cylinders, a plurality of filter valves, and an air suction pipe.
[0006] The output shaft sprocket of the power source and the sprocket of the crankshaft are connected by a chain.
[0007] The front and rear ends of the crankshaft are respectively supported on the opposite side walls of the box body through bearings.
[0008] The rear part of the cylinder block of each cylinder is hinged to the side wall of the box body through a shaft.
[0009] The end of the piston rod of each cylinder is arranged on the corresponding connecting rod journal of the crankshaft through its respective bearing.
[0010] The filter valve includes a filter valve housing, a filter element, a filter valve air inlet and outlet, a filter valve air inlet, and a filter valve air outlet.
[0011] The filter element is arranged inside the filter valve housing.
[0012] The filter valve housing is provided with a filter valve air inlet and outlet.
[0013] The filter valve housing is provided with a filter valve air inlet and is provided with an intake check valve.
[0014] The filter valve housing is provided with a filter valve air outlet and is provided with an outlet check valve.
[0015] The left air port pipeline of the cylinder is connected to the filter valve air inlet and outlet of the corresponding filter valve, and the filter valve air inlet pipeline is connected to the air suction pipe.
[0016] The right air port pipeline of the cylinder is connected to the filter valve air inlet and outlet of the corresponding filter valve, and the filter valve air inlet pipeline is connected to the air suction pipe.
[0017] The air suction pipe has at least one air suction port.
[0018] Its advantages are as follows:
[0019] This vacuum pump can use a motor, a motor reducer, a hydraulic motor, etc. as the power source, and can achieve a low rotational speed of several hundred revolutions per minute. The required power can be reduced, the cost can be reduced, the failure rate is low and it is not easy to be damaged, the maintenance is convenient, multiple cylinders are used in combination to form a greater negative pressure. The more cylinders there are, the greater the negative pressure formed, and it is convenient to be used in combination with the hydraulic system. The inhaled air is filtered to keep the cylinder cavity clean and hygienic. The blown air passes through the filter element and can take away the dust on the filter element, and the cost is low. Description of the Drawings
[0020] Figure 1 It is a schematic structural diagram of the present utility model.
[0021] Figure 2 It is a schematic structural diagram of the present utility model with the box body removed.
[0022] Figure 3 It is a schematic structural diagram of the filter valve.
[0023] Figure 4 It is a sectional view of the filter valve.
[0024] Figure 5 It is a schematic diagram of the gas path connection principle of the present utility model.
[0025] Figure 6 It is Figure 5 A partial enlarged view on the left side.
[0026] Box body 1, power source 2, crankshaft 3, cylinder 4, filter valve 5, air suction pipe 6, chain 7, connecting rod neck 8, left air port 9, right air port 10, filter valve housing 11, filter element 12, filter valve air inlet and outlet 13, filter valve air inlet 14, filter valve air outlet 15, air suction port 16, outlet check valve 17, inlet check valve 18, piston 19. Detailed Implementation Modes
[0027] A vacuum pump includes a box body 1, a power source 2, a crankshaft 3, a plurality of cylinders 4, a plurality of filter valves 5 and an air suction pipe 6.
[0028] The housing of the power source 2 is fixed inside the box body 1.
[0029] The box body 1 is a rectangular box body.
[0030] The power source 2 can be a hydraulic motor or a motor, a motor reducer.
[0031] The sprocket on the output shaft of the power source 2 (the output shaft of the hydraulic motor) and the sprocket at the rear end of the crankshaft 3 are connected by a chain 7.
[0032] Both the front and rear ends of the crankshaft 3 are supported on the front and rear opposite side walls of the box body 1 through bearings ( Figure 1 The front side wall is not drawn in the figure).
[0033] The rear part of the cylinder block of each cylinder 4 is hinged to the right side wall of the box body 1 through a shaft.
[0034] The end of the piston rod of each cylinder 4 is arranged on the corresponding connecting rod journal 8 of the crankshaft 3 through its respective bearing, and a plurality of connecting rod journals 8 are arranged at uniform angles on the circumference of the crankshaft 3.
[0035] In this embodiment, there are three connecting rod journals 8, which are evenly arranged in the circumferential direction of the crankshaft 3 and are arranged at 120°.
[0036] The filter valve 5 includes a filter valve housing 11, a filter element 12, a filter valve air inlet and outlet 13, a filter valve air inlet 14, and a filter valve air outlet 15.
[0037] The filter element 12 is arranged inside the filter valve housing 11. The filter valve housing 11 is in the shape of a cuboid.
[0038] The front side of the filter valve housing 11 is provided with the filter valve air inlet and outlet 13.
[0039] The left side of the filter valve housing 11 is provided with the filter valve air inlet 14.
[0040] The filter valve air inlet 14 is provided with an intake check valve 18, which can only intake air.
[0041] The lower side of the filter valve housing 11 is provided with the filter valve air outlet 15.
[0042] The filter valve air outlet 15 is provided with an exhaust check valve 17, which can only exhaust air.
[0043] The left air port 9 of the cylinder 4 is connected to the filter valve air inlet and outlet 13 of the corresponding filter valve 5 through a pipeline, and the filter valve air inlet 14 of this filter valve is connected to the suction pipe 6 through a pipeline.
[0044] The right air port 10 of the cylinder 4 is connected to the filter valve air inlet and outlet 13 of the corresponding filter valve 5 through a pipeline, and the filter valve air inlet 14 of this filter valve is connected to the suction pipe 6 through a pipeline.
[0045] The suction pipe 6 has at least one suction port 16. In this embodiment, there are two suction ports 16.
[0046] The working principle is as follows:
[0047] The output shaft sprocket of the power source 2 and the sprocket of the crankshaft 3 are connected by a chain 7. The power source 2 drives the crankshaft 3 to rotate, and the crankshaft 3 drives the piston rods of at least three cylinders 4 to move left and right. Each cylinder 4 has two filter valves 5 with the same structure to cooperate. As Figure 5 andFigure 6 As shown in:
[0048] When the piston 19 of the air cylinder 4 moves to the left, the air in the left chamber is pushed to the corresponding filter valve 5, and from the air outlet 15 of the filter valve, it pushes open the outlet check valve 17 and discharges. At the same time, the dust accumulated on the filter element 12 can be blown out. At the same time, the right chamber becomes larger, and the air is inhaled from the air inlet 16 into the air inlet 14 of the filter valve, pushes open the inlet check valve 18, passes through the filter element 12 for filtration, and enters the right chamber from the air inlet and outlet 13 of the filter valve. After being filtered by the filter element 12, the hygiene of the chamber of the air cylinder 4 can be maintained, and the required negative pressure for sucking seeds is formed in the equipment connected to the air inlet 16.
[0049] When the piston 19 of the air cylinder 4 moves to the right, the air in the right chamber is pushed from the air inlet and outlet 13 of the filter valve to the corresponding filter valve 5, and from the air outlet 15 of the filter valve, it pushes open the outlet check valve 17 and discharges. At the same time, the left chamber becomes larger, and the air is inhaled from the air inlet 16 into the air inlet 14 of the filter valve, pushes open the inlet check valve 18, passes through the filter element 12 for filtration, and enters the left chamber from the air inlet and outlet 13 of the filter valve, and the required negative pressure for sucking seeds is formed in the equipment connected to the air inlet 16.
[0050] The crankshaft 3 drives the piston rods of the three air cylinders 4 to move left and right in sequence, and the sequence of the left and right movements of the piston rods of the air cylinders 4 forms an inhalation negative pressure. That is, when the piston 19 of the air cylinder 4 compresses the air in one chamber, the air is discharged from the air outlet 15 of the filter valve, and the air enters from the air suction pipe 6, the air inlet 14 of the filter valve to the air inlet and outlet 13 of the filter valve in the other chamber, and the required negative pressure for sucking seeds is formed at the air inlet 16.
[0051] Using the hydraulic motor as the power source as described above can achieve low rotational speed and is convenient for cooperating with the hydraulic system for use in the seed metering device.
[0052] The power source 2 can also be an electric motor or an electric motor reducer.
[0053] The sprocket on the output shaft of the electric motor and the sprocket at the rear end of the crankshaft 3 are connected and driven by a chain 7, or the sprocket on the output shaft of the electric motor reducer and the sprocket at the rear end of the crankshaft 3 are connected and driven by a chain 7.
Claims
1. A vacuum pump, comprising a box body (1), a power source (2), a crankshaft (3), a plurality of cylinders (4), a plurality of filter valves (5) and an air suction pipe (6); characterized in that: The output shaft sprocket of the power source (2) and the sprocket of the crankshaft (3) are connected by a chain (7); The front and rear ends of the crankshaft (3) are respectively supported on the opposite side walls of the box body (1) through bearings; The rear part of the cylinder block of each cylinder (4) is hinged to the side wall of the box body (1) through a shaft; The end of the piston rod of each cylinder (4) is arranged on the corresponding connecting rod journal (8) of the crankshaft (3) through its own bearing; The filter valve (5) comprises a filter valve housing (11), a filter element (12), a filter valve air inlet and outlet (13), a filter valve air inlet (14) and a filter valve air outlet (15); The filter element (12) is arranged inside the filter valve housing (11); The filter valve housing (11) is provided with a filter valve air inlet and outlet (13); The filter valve housing (11) is provided with a filter valve air inlet (14) and is provided with an intake check valve (18); The filter valve housing (11) is provided with a filter valve air outlet (15) and is provided with an outlet check valve (17); The left air port (9) of the cylinder (4) is connected to the filter valve air inlet and outlet (13) of the corresponding filter valve (5) through a pipeline, and the filter valve air inlet (14) is connected to the air suction pipe (6) through a pipeline; The right air port (10) of the cylinder (4) is connected to the filter valve air inlet and outlet (13) of the corresponding filter valve (5) through a pipeline, and the filter valve air inlet (14) is connected to the air suction pipe (6) through a pipeline; The air suction pipe (6) has at least one air suction port (16).
2. The vacuum pump according to claim 1, characterized in that: The plurality of connecting rod journals (8) on the crankshaft (3) are arranged at uniform angles in the circumferential direction.
3. The vacuum pump according to claim 1, characterized in that: There are three of the cylinders (4).
4. The vacuum pump according to claim 1, characterized in that: The air suction pipe (6) has two air suction ports (16).
5. The vacuum pump according to claim 1, characterized in that: The power source (2) is a hydraulic motor, an electric motor or an electric motor speed reducer.