Oil mist pump assembly and control method thereof

Abstract

The invention relates to an oil mist pump assembly and a control method thereof. The oil mist pump assembly comprises a pump body. A nozzle assembly, a counting assembly, a pump component and a rubber tube part are respectively arranged on the pump main body; the pump assembly quantitatively outputs oil; a counting assembly is arranged at the input end or the output end of the pump assembly. The output end of the pump assembly is connected with the nozzle assembly; an inlet of the pump assembly is connected with the oil mist chamber box body through a corresponding rubber pipe part; an outlet of the pump assembly is connected with the nozzle assembly through an oil supply pipe. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] This invention relates to an oil mist pump assembly and its control method, to the field of micro-oil mist lubrication, and particularly to a micro-oil mist lubrication system with precisely controllable discharge volume. Background Technology

[0002] Oil mist lubrication technology utilizes the energy of compressed air to atomize liquid lubricating oil into small particles of 1um-3um, which are suspended in the compressed air to form a mixture (oil mist). Under its own pressure energy, the mixture is delivered to various parts that need lubrication through transmission pipelines.

[0003] Existing oil mist lubrication devices have a relatively simple design and lack controllable adjustment mechanisms, making it difficult to achieve precise control of the oil mist volume in practical applications. Due to the lack of an effective metering and adjustment mechanism, insufficient or excessive oil mist supply often occurs at the lubrication points. This not only significantly affects the lubrication effect but may also pose a potential threat to the stable operation of the equipment.

[0004] Oil mist lubrication devices on the market often suffer from insufficient or excessive oil intake at lubrication points due to the lack of an effective oil volume regulation mechanism.

[0005] Traditionally, a venturi tube is used for atomization, which uses gas to atomize the lubricating oil. The applicant found that using negative pressure to atomize the lubricating oil resulted in a large pressure loss and the formation of a negative pressure arc, making it impossible to accurately add lubricating oil.

[0006] This invention creatively modifies the Venturi tube, transforming the passive process of lubricating oil entering the necked section into an active positive pressure supply to the liquid. Simultaneously, it creates a negative pressure seal, generating a needle-like effect. This prevents lubricating oil remaining in the pipeline from entering the Venturi tube, reducing its load and ensuring that the pressure generated by the Venturi tube is fully utilized for mixing and atomization. This invention changes the traditional counter by using a high-quality counter. The applicant discovered that hydraulic oil is recycled, which leads to the accumulation of impurities in the oil tank and sedimentation in the pipeline. In contrast, lubricating oil is unidirectionally output and will not carry impurities back to the oil tank. Therefore, this invention creatively uses a more accurate and reliable counter. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an oil mist pump assembly and its control method.

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows: In order to provide a more precise lubrication device and achieve reasonable distribution of air pressure, an oil mist pump assembly is provided, including a pump body; The pump body is equipped with a nozzle assembly, a counting assembly, a pump component, and a hose section. The pump assembly outputs oil in a metered manner; A counting assembly is provided at the input or output end of the pump assembly; The pump assembly output is connected to the nozzle assembly; The pump assembly inlet is connected to the oil mist chamber housing via a corresponding hose section; The outlet of the pump assembly is connected to the nozzle assembly via an oil supply pipe.

[0009] As a further improvement to the above technical solution: In order to store lubricating oil, an oil mist chamber is installed below the pump body; The pump body is equipped with a mounting bracket; The pump body is connected to an external air source unit; The gas source outlet passes through an oil separator to the collection node A; The nozzle assembly outlet is equipped with a collection node B; In order to achieve reasonable air pressure distribution and reduce the complexity of the pump body, the collection node A is divided into at least three paths: air path A, air path B, and air path C. Gas line A is connected to the first inlet of the counting assembly; Gas line B connects to the inlet of the nozzle assembly; Gas path C is connected to the manifold B via flow regulating valve A.

[0010] An oil mist chamber fixing plate is installed on the oil mist chamber housing; A valve assembly is installed at the input end of the pump assembly; To enable liquid level monitoring, a liquid level switch assembly is installed inside the oil mist chamber.

[0011] To facilitate coordination with the electronic control, a pressure gauge and / or manifold pressure switch B are connected to the bypass of the junction node B; The main pressure switch A is connected to the side of the collection node A.

[0012] The nozzle assembly is connected to the oil mist chamber housing via a return liquid line; A liquid return throttle valve is installed on the return line; The aggregation node B connects to several branch pipelines through the main pipeline; This ensures pressure balance, and the oil mist chamber is connected to the air pipe.

[0013] The counting assembly (counter) includes a transparent counting mounting base; a counting inner cavity is provided inside the transparent counting mounting base, and a counting rotary joint is provided on the top of the transparent counting mounting base; a counting oil inlet is provided on the counting rotary joint; The counting inlet is connected to the counting chamber; A counting proximity switch is provided on the side of the transparent mounting base for counting; A counting sensor block is installed in the counting cavity; The counting sensor block is equipped with a counting proximity switch; A counting end screw is provided at the counting outlet A at the bottom of the counting chamber; A counting spring is provided in the counting cavity, and a counting sensing block is provided at the upper end of the counting spring; Lubricating oil flows through the gap between the counting sensor block and the counting chamber.

[0014] To ensure precise metering, the active pump assembly includes a central pump body and a lower pump cover located below the central pump body. A large metering cavity is provided on the upper part of the pump body; a small metering cavity is connected to the lower end of the large metering cavity. A metering piston is installed in the large internal cavity of the metering unit; A metering piston spring is provided between the metering piston and the bottom surface of the metering inner cavity. A metering inlet is provided on the side of the pump body to connect to the metering small inner cavity; The lower end of the metering piston is used for guidance and is positioned within the metering cavity. A measuring copper sleeve is provided at the lower end of the small measuring cavity; A metering steel ball component moves within the metering copper sleeve; A sealing opening is provided at the inlet of the metering copper sleeve to ensure a sealed contact with the metering steel ball component; A metering oil outlet is provided below the metering steel ball component; a metering spring is provided between the metering steel ball component and the metering oil outlet. The pump body is equipped with a metering channel that communicates with the metering inner cavity. The metering piston is used to open or close the metering inlet.

[0015] To achieve good atomization, the nozzle assembly includes a nozzle body and a nozzle housing that are connected together. A nozzle mounting cavity is provided between the lower part of the nozzle body and the nozzle housing; A nozzle intermediate sleeve is provided in the nozzle mounting cavity; The nozzle core is located within the inner cavity of the nozzle intermediate sleeve. The nozzle inner core contacts the inner wall of the nozzle intermediate sleeve; A nozzle valve core is provided at the lower part of the nozzle inner core; The nozzle valve core is located above the nozzle housing; A Venturi air inlet is provided between the lower small end of the nozzle inner core and the inner side wall of the nozzle middle sleeve. A nozzle inlet is provided on the nozzle body; A nozzle interlayer channel is provided between the nozzle body and the nozzle intermediate sleeve; A nozzle necking channel communicating with the nozzle inner core through hole is provided at the top of the nozzle housing; Below the nozzle constriction channel are sequentially connected a nozzle secondary expansion channel and a Venturi oil mist outlet. A secondary radial hole for the nozzle is radially provided on the outer wall of the secondary expansion channel of the nozzle. A Venturi intermediate air port is provided on the outer wall of the nozzle intermediate sleeve; The Venturi intermediate air port connects the nozzle inlet to the Venturi air inlet; A Venturi oil inlet is provided at the top of the nozzle body; The venturi inlet connects to the nozzle mounting cavity.

[0016] An intake throttle valve is installed on air passage A.

[0017] A control method for an oil mist pump assembly, comprising the aforementioned oil mist pump assembly; the control method includes the following steps; Step 1: Compressed gas passes through the pump body; Step two: The compressed gas is divided into three streams; S2.1, one path drives the pump assembly through the valve group, and the counting assembly realizes quantitative oil supply to the nozzle assembly; S2.2, the second path enters the nozzle assembly input end to atomize the lubricating oil; S2.3, the three channels send compressed gas into the output end of the nozzle assembly to perform secondary diffusion output of atomized lubricating oil; Step 3: The secondary diffusion atomized lubricating oil is output through several branch pipelines.

[0018] As a further improvement to the above technical solution: In step one, the gas output from the gas source unit passes through the oil separator and clean air is output to the collection node A; In step two, In step S2.1, clean air enters the pump assembly and exits the nozzle assembly through the counting assembly. When the valve assembly is opened, a stream of clean air drives the metering piston, overcoming the metering piston spring and compressing the large metering chamber. At the same time, it compresses the small metering chamber, causing the lubricating oil to flow downwards. This causes the metering steel ball to overcome the metering spring and open, allowing the lubricating oil that enters from the metering inlet to be discharged quantitatively through the metering outlet. The lubricating oil is then fed into the venturi inlet of the oil supply pipe and nozzle assembly, and the lubricating oil entering and exiting the metering channel is balanced. In the counting assembly, lubricating oil enters the counting chamber through the counting inlet, which pushes the counting sensor block to move relative to the counting proximity switch, generating a signal change. The lubricating oil passes through the gap between the counting sensor block and the counting chamber and is output through the counting outlet A. When the lubricating oil stops intermittently, the counting sensor block is reset by the counting spring. In step S2.2, the intake throttle valve enters the nozzle assembly through air passage B; In the nozzle assembly; After passing through the nozzle inlet, the clean air enters the nozzle necking channel through the Venturi intermediate air port and the Venturi air inlet, which carries the lubricating oil through the Venturi oil inlet into the nozzle necking channel. After mixing, the air is discharged from the nozzle secondary expansion channel. In step S2.3, clean air enters the secondary expansion channel of the nozzle through the secondary radial hole of the nozzle and is discharged from the Venturi oil mist outlet.

[0019] The micro-lubrication system of this invention can continuously and efficiently atomize lubricating oil into small particles and accurately deliver fresh, clean atomized lubricating oil to multiple lubrication points, uniformly covering the lubricated parts for lubrication and cooling.

[0020] This technology, through precise control of the micro-oil quantity, can continuously provide clean yet optimal amounts of lubricating oil to the lubrication surface. Combined with the cooling effect of air, it keeps the temperature rise of moving friction parts to a minimum, maximizing mechanical performance.

[0021] Its design is reasonable, low cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact structure and easy to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the pump body structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the counting assembly structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the pump assembly structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the nozzle assembly structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the hydraulic principle and structure of the present invention.

[0027] Figure 6 This is a circuit diagram of the present invention.

[0028] Figure 7 This is a schematic diagram of the workflow of the present invention.

[0029] The components include: 1. Pump body; 2. Nozzle assembly; 3. Counting assembly; 4. Pump assembly; 5. Hose section; 6. Main pressure switch A; 7. Manifold pressure switch B; 8. Oil supply pipe; 9. Pressure gauge; 10. Level switch assembly; 11. Oil mist chamber housing; 12. Oil mist chamber fixing plate; 13. Mounting bracket; 15. Counting transparent mounting base; 16. Counting oil outlet A; 17. Counting end screw; 18. Counting inner cavity; 19. Counting spring; 20. Counting sensing block; 21. Counting proximity switch; 22. Counting oil inlet; 23. Counting rotary joint; 24. Lower pump body cover; 25. Middle pump body component; 26. Large metering inner cavity; 27. Metering piston component; 28. Metering piston spring; 29. ​​Metering oil inlet; 30. Metering steel ball component; 31. Small metering inner cavity; 32. Metering spring; 33. Metering oil outlet; 34. Counting... 35. Metering sleeve; 36. Metering channel opening; 37. Nozzle mounting cavity; 38. Nozzle body; 39. Nozzle housing; 40. Nozzle intermediate sleeve; 41. Nozzle inner core; 42. Nozzle inlet; 43. Nozzle interlayer channel; 44. Nozzle secondary radial hole; 45. Nozzle necking channel; 46. Venturi intermediate air port; 47. Venturi air inlet; 48. Nozzle secondary expansion channel; 49. Nozzle valve core; 50. Venturi oil mist outlet; 51. Venturi oil inlet; 52. Gas source section; 53. Gathering node A; 54. Gas path A; 55. Gas path B; 56. Gas path C; 57. Flow control valve A; 58. Gathering node B; 59. Liquid return line; 60. Liquid return throttle valve; 61. Main pipeline section; 62. Branch line; 63. Oil separator; 64. Vent pipe; 65. Inlet throttle valve; 66. Valve assembly. Detailed Implementation

[0030] like Figure 1-7 As shown, the oil mist pump assembly of this embodiment includes a pump body 1; it can be a separate or integral unit.

[0031] The pump body 1 is respectively provided with a nozzle assembly 2, a counting assembly 3, and a pump assembly 4 connected to a hose section 5. If they are connected through the internal pipeline of the body, they are equivalent to being connected. The present invention cleverly combines the three to achieve unexpected effects. Pump assembly 4 outputs oil in a metered manner; it achieves metered feeding and, when the venturi is working, forms a needle effect, thereby preventing excessive extraction of lubricating oil from the corresponding pipeline. Through three-way output, it prevents atomized oil mist from being drawn back into the pipeline.

[0032] A counting assembly 3 is provided at the input or output end of the pump assembly 4 to achieve accurate metering.

[0033] Pump assembly 4 is connected to nozzle assembly 2 at its output end; The inlet of pump assembly 4 is connected to oil mist chamber housing 11 via a corresponding hose section 5 to achieve oil storage.

[0034] The outlet of pump assembly 4 is connected to nozzle assembly 2 via oil supply pipe 8.

[0035] An oil mist chamber 11 is provided below the pump body 1 to collect oil. The pump body 1 is equipped with a mounting bracket 13 for easy fixing.

[0036] The pump body 1 is externally connected to an air source unit 51; it can be integrated or a separate unit.

[0037] In order to pre-treat the incoming air, the air source section 51 outlet passes through the oil separator 63 and the air filter to the collection node A52; The nozzle assembly 2 outlet is provided with a collection node B57; The collection node A52 is divided into at least three paths: gas path A53, gas path B54, and gas path C55. By cleverly combining these three paths, the accuracy of the feed rate is improved. Gas line A53 is connected to the inlet of counter assembly 3; Gas line B54 connects to nozzle assembly 2 - inlet; Gas line C55 is connected to manifold B57 via flow regulating valve A56.

[0038] An oil mist chamber fixing plate 12 is provided on the oil mist chamber housing 11; A valve group 66 is provided at the input end of the pump assembly 4 to realize reversing control and counting function; A liquid level switch assembly 10 is installed inside the oil mist chamber 11 to achieve liquid level monitoring.

[0039] The manifold pressure switch B7 is connected to the bypass of the junction node B57; The main pressure switch A6 is connected to the bypass of the aggregation node A52, thus enabling connection to the main control.

[0040] The nozzle assembly 2 is connected to the oil mist chamber housing 11 via the return liquid line 59; A liquid return throttle valve 60 is installed on the return line 59 to achieve flow regulation.

[0041] The converging node B57 connects to several branch pipelines 62 via the main pipeline 61, thus achieving multi-point lubrication.

[0042] The oil mist chamber 11 is connected to the air pipe 64.

[0043] The inventive aspect of this invention lies in utilizing the unidirectional output characteristic of lubricating oil. The counting assembly 3 includes a transparent counting mounting base 15; a counting inner cavity 18 is provided inside the transparent counting mounting base 15; a counting rotary joint 23 is provided on the top of the transparent counting mounting base 15; and a counting oil inlet 22 is provided on the counting rotary joint 23. The counting inlet 22 connects to the counting inner cavity 18; A counting proximity switch 21 is provided on the side of the transparent mounting base 15 to achieve accurate counting; A counting sensor block 20 is provided in the counting cavity 18; The counting sensor block 20 is equipped with a counting proximity switch 21; A counting end screw 17 is provided at the counting oil outlet A16 at the bottom of the counting chamber 18, thereby realizing stroke adjustment and stroke monitoring, and thus achieving accurate matching of the reversing count, instead of generating erroneous records, which is something that a simple solenoid valve reversing record cannot achieve. A counting spring 19 is provided in the counting cavity 18, and a counting sensing block 20 is provided at the upper end of the counting spring 19; Lubricating oil flows through the gap between the counting sensor block 20 and the counting chamber 18.

[0044] In order to achieve active and precise delivery, the pump assembly 4 includes a middle pump body 25 and a lower pump body cover 24 disposed below the middle pump body 25. A large metering cavity 26 is provided on the upper part of the pump body 25; a small metering cavity 31 is connected to the lower end of the large metering cavity 26. A metering piston 27 is provided in the large internal cavity of the metering section 26; A metering piston spring 28 is provided between the bottom surface of the metering piston 27 and the metering large inner cavity 26; A metering inlet 29 is provided on the side of the pump body 25 to connect to the metering small inner cavity 31; The lower end of the metering piston 27 is used for guidance and is disposed in the metering small inner cavity 31; A measuring copper sleeve 34 is provided at the lower end of the measuring small inner cavity 31; A metering steel ball component 30 moves within the metering copper sleeve 34; A sealing opening is provided at the inlet of the metering copper sleeve 34 to make sealing contact with the metering steel ball component 30; A metering oil outlet 33 is provided below the metering steel ball component 30; a metering spring 32 is provided between the metering steel ball component 30 and the metering oil outlet 33. A metering channel 35 is provided in the pump body 25, which communicates with the metering large inner cavity 26; The metering piston 27 is used to open or close the metering inlet 29.

[0045] In order to achieve precise spray atomization, avoid the residence time of atomized oil mist, and increase the diffusion area of ​​oil mist, the nozzle assembly 2 includes a nozzle body 37 and a nozzle housing 38 connected together; A nozzle mounting cavity 36 is provided between the lower part of the nozzle body 37 and the nozzle housing 38; A nozzle intermediate sleeve 39 is provided in the nozzle mounting cavity 36; The nozzle core 40 is located inside the nozzle intermediate sleeve 39. The nozzle inner core 40 is in contact with the inner wall of the nozzle intermediate sleeve 39; A nozzle valve core 48 is provided at the lower part of the nozzle inner core 40; The nozzle valve core 48 is located above the nozzle housing 38; A Venturi air inlet 46 is provided between the lower small end of the nozzle inner core 40 and the inner side wall of the nozzle intermediate sleeve 39. A nozzle inlet 41 is provided on the nozzle body 37; A nozzle interlayer channel 42 is provided between the nozzle body 37 and the nozzle intermediate sleeve 39; A nozzle constriction channel 44, which communicates with the through hole of the nozzle core 40, is provided at the top of the nozzle housing 38; thereby achieving high-speed and efficient atomization, reducing the loss of oil output driven by pressure in the venturi tube, and at the same time, achieving air-oil encapsulation to prevent oil from adhering to the channel.

[0046] Below the nozzle constriction channel 44, there are sequentially connected nozzle secondary expansion channel 47 and Venturi oil mist outlet 49. A secondary radial hole 43 is provided on the outer wall of the secondary expansion channel 47 of the nozzle, thereby enabling the oil mist to open rapidly.

[0047] A Venturi central air port 45 is provided on the outer wall of the nozzle intermediate sleeve 39; thereby realizing the convergence of airflow and high-speed ejection.

[0048] The Venturi intermediate air port 45 connects the nozzle inlet 41 and the Venturi air inlet 46; A Venturi oil inlet 50 is provided on the top of the nozzle body 37; The venturi inlet 50 connects to the nozzle mounting cavity 36.

[0049] An intake throttle valve 65 is installed on the air passage A53.

[0050] The control method for the oil mist pump assembly in this embodiment includes the oil mist pump assembly described above; the control method includes the following steps; Step 1: Compressed gas passes through pump body 1; Step two: The compressed gas is divided into three streams; S2.1, the pump assembly 4 is driven by valve group 66, and the metered oil supply to nozzle assembly 2 is achieved through counting assembly 3; S2.2, the second path enters the input end of the nozzle assembly 2 to atomize the lubricating oil; S2.3, the three channels send compressed gas into the output end of the nozzle assembly 2 to perform secondary diffusion output of the atomized lubricating oil; Step 3: The secondary diffusion atomized lubricating oil is output through several branch pipelines.

[0051] In step one, the gas output from the gas source unit 51 passes through the oil separator 63 and is then cleaned and output to the collection node A52. In step two, In step S2.1, clean air enters the pump assembly 4 and exits the nozzle assembly 2 through the counting assembly 3. When valve assembly 66 is opened, a stream of clean air drives metering piston 27, overcoming metering piston spring 28 and compressing metering large inner cavity 26. At the same time, it compresses metering small inner cavity 31, causing lubricating oil to flow downward. This causes metering steel ball 30 to open overcoming metering spring 32, allowing lubricating oil entering from metering inlet 29 to be discharged quantitatively through metering outlet 33. This balances the lubricating oil entering and exiting the venturi inlet 50 and metering channel 35 of the oil supply pipe 8 and nozzle assembly 2. In the counting assembly 3, lubricating oil enters the counting chamber 18 through the counting inlet 22, which pushes the counting sensor block 20 to move relative to the counting proximity switch 21 to generate a signal change. The lubricating oil passes through the gap between the counting sensor block 20 and the counting chamber 18 and is output through the counting outlet A16. When the lubricating oil stops intermittently, the counting sensor block 20 is reset by the counting spring 19; In step S2.2, the intake throttle valve 65 enters the nozzle assembly 2 through the air passage B54; In nozzle assembly 2; After passing through the nozzle inlet 41, the clean air enters the nozzle necking channel 44 through the Venturi intermediate air port 45 and the Venturi air inlet 46, which carries the lubricating oil through the Venturi oil inlet 50 into the nozzle necking channel 44. After mixing, the lubricating oil is discharged from the nozzle secondary expansion channel 47. In step S2.3, clean air enters the secondary expansion channel 47 of the nozzle through the secondary radial hole 43 and is discharged from the Venturi oil mist outlet 49.

[0052] Combination Figure 7 The preferred control principle of this invention is as follows: An oil mist pump uses high-speed compressed air to convert lubricating oil into tiny, lightweight oil mist particles. These converted oil mist particles are then transported to various lubrication points by low-speed airflow.

[0053] Compressed air undergoes initial filtration and an oil separator to remove entrained moisture, oil, and other impurities, resulting in a dry and clean air source. This clean air then flows through a pressure regulating valve into the Venturi nozzle where oil mist is generated, passing at high speed. Simultaneously, a constant displacement pump delivers a measured amount of lubricating oil to the Venturi nozzle at a set frequency. The lubricating oil entering the Venturi nozzle is atomized under the impact of the high-speed airflow and flows into the oil mist screening chamber.

[0054] Large, heavy oil particles are deposited at the bottom of the screening chamber and then re-enter the Venturi nozzles through the circulation channel for atomization. The generated oil mist flows with low-speed air in the manifold towards the lubrication points. After passing through the condensation nozzles before the lubrication points, it is transformed into an easily adhering state and blown with air to each lubrication point to form a lubricating oil film and cool the components.

[0055] The compressed air at the inlet is divided into three paths: The first path serves as the power source for the metering pump. A two-position three-way solenoid valve is installed between the gas path and the metering pump. By setting the switching frequency of the solenoid valve, the gas supply of this path can be controlled, thereby controlling the metering pump to pump oil in a timed and quantitative manner. The second path serves as the gas source for oil atomization, atomizing the input oil into oil mist particles through a Venturi atomizer. The third path serves as the power source for oil mist delivery. This path's air pipe is equipped with a flow regulating valve, allowing manual adjustment of the airflow rate according to operating conditions.

[0056] The second venturi atomizer has an integrated counter that accurately senses and records the number of times the metering pump has pumped oil via a proximity switch.

[0057] Since the metering pump has a fixed displacement, the pumping rate can be accurately controlled by controlling the number of pumping cycles.

[0058] The present invention has been described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed in detail.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of the present invention can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All technical contents not described in detail in the present invention are well-known technologies.

Claims

1. An oil mist pump assembly, characterized in that: Including the pump body (1); The pump body (1) is provided with a nozzle assembly (2), a counting assembly (3), a pump assembly (4), and a hose section (5). Pump assembly (4) outputs oil in a metered manner; A counting assembly (3) is provided at the input or output end of the pump assembly (4); The pump assembly (4) is connected to the nozzle assembly (2) at its output end.

2. The oil mist pump assembly according to claim 1, characterized in that: An oil mist chamber housing (11) is provided below the pump body (1); The outlet of the pump assembly (4) is connected to the nozzle assembly (2) via the oil supply pipe (8); The pump body (1) is equipped with a mounting bracket (13); The pump body (1) is externally connected to an air source unit (51); The outlet of the gas source section (51) passes through the oil separator (63) to the collection node A (52); The nozzle assembly (2) has a collection node B (57) at its outlet. The aggregation node A (52) is divided into at least three paths: gas path A (53), gas path B (54), and gas path C (55); Gas line A (53) is connected to the inlet of the counting assembly (3); Gas path B (54) is connected to the nozzle assembly (2) inlet; Gas path C (55) is connected to manifold B (57) via flow regulating valve A (56); The inlet of the pump assembly (4) is connected to the oil mist chamber housing (11) via the corresponding hose section (5).

3. The oil mist pump assembly according to claim 2, characterized in that: An oil mist chamber fixing plate (12) is provided on the oil mist chamber housing (11); A valve group (66) is provided at the input end of the pump assembly (4); A level switch assembly (10) is installed inside the oil mist chamber housing (11).

4. The oil mist pump assembly according to claim 2, characterized in that: The manifold node B (57) is connected to a pressure gauge (9) and / or a manifold pressure switch B (7). The main pressure switch A(6) is connected to the side of the collection node A(52).

5. The oil mist pump assembly according to claim 2, characterized in that: The nozzle assembly (2) is connected to the oil mist chamber housing (11) via the return liquid line (59); A liquid return throttle valve (60) is installed on the return line (59); The aggregation node B (57) is connected to several branch pipelines (62) through the main pipeline section (61); The oil mist chamber (11) is connected to the air pipe (64).

6. The oil mist pump assembly according to claim 5, characterized in that: The counting assembly (3) includes a counting transparent mounting base (15); a counting inner cavity (18) is provided inside the counting transparent mounting base (15), and a counting rotary joint (23) is provided on the top of the counting transparent mounting base (15); a counting oil inlet (22) is provided on the counting rotary joint (23). The counting inlet (22) is connected to the counting chamber (18); A counting proximity switch (21) is provided on the side of the counting transparent mounting base (15); A counting sensor block (20) is provided in the counting cavity (18); The counting sensor block (20) is equipped with a counting proximity switch (21); A counting end screw (17) is provided at the counting oil outlet A (16) at the bottom of the counting chamber (18). A counting spring (19) is provided in the counting cavity (18), and a counting sensing block (20) is provided at the upper end of the counting spring (19). Lubricating oil flows through the gap between the counting sensor block (20) and the counting chamber (18).

7. The oil mist pump assembly according to claim 5, characterized in that: The pump assembly (4) includes a middle pump body (25) and a lower pump body cover (24) disposed below the middle pump body (25). A metering large inner cavity (26) is provided on the upper part of the pump body (25); a metering small inner cavity (31) is connected to the lower end of the metering large inner cavity (26). A metering piston (27) is provided in the metering large inner cavity (26); A metering piston spring (28) is provided between the metering piston (27) and the bottom surface of the metering large inner cavity (26). A metering inlet (29) is provided on the side of the pump body (25) to connect to the metering small inner cavity (31). The lower end of the metering piston (27) is used for guidance and is set in the metering small inner cavity (31); A metering copper sleeve (34) is provided at the lower end of the metering small inner cavity (31). Measuring steel ball (30) moves inside the measuring copper sleeve (34); A sealing closure is provided at the inlet of the metering copper sleeve (34) to seal against the metering steel ball (30); A metering oil outlet (33) is provided below the metering steel ball (30); a metering spring (32) is provided between the metering steel ball (30) and the metering oil outlet (33); A metering channel (35) is provided in the pump body (25) to communicate with the metering inner cavity (26); The metering piston (27) is used to open or close the metering inlet (29).

8. The oil mist pump assembly according to claim 5, characterized in that: The nozzle assembly (2) includes a nozzle body (37) and a nozzle housing (38) connected together. A nozzle mounting cavity (36) is provided between the lower part of the nozzle body (37) and the nozzle housing (38). A nozzle intermediate sleeve (39) is provided in the nozzle mounting cavity (36); There is a nozzle core (40) inside the cavity of the nozzle intermediate sleeve (39); The nozzle inner core (40) contacts the inner wall of the nozzle intermediate sleeve (39); A nozzle valve core (48) is provided at the lower part of the nozzle inner core (40). The nozzle valve core (48) is above the nozzle housing (38); A Venturi air inlet (46) is provided between the lower small end of the nozzle inner core (40) and the inner side wall of the nozzle intermediate sleeve (39). A nozzle inlet (41) is provided on the nozzle body (37); A nozzle interlayer channel (42) is provided between the nozzle body (37) and the nozzle intermediate sleeve (39). A nozzle necking channel (44) communicating with the through hole of the nozzle core (40) is provided on the top of the nozzle housing (38). Below the nozzle constriction channel (44) are sequentially connected the nozzle secondary expansion channel (47) and the Venturi oil mist outlet (49). A secondary radial hole (43) for the nozzle is radially provided on the outer wall of the secondary expansion channel (47) of the nozzle. A Venturi intermediate air port (45) is provided on the outer wall of the nozzle intermediate sleeve (39); The Venturi intermediate air port (45) connects the nozzle inlet (41) and the Venturi air inlet (46); A Venturi oil inlet (50) is provided on the top of the nozzle body (37); The Venturi inlet (50) connects to the nozzle mounting cavity (36); An intake throttle valve (65) is installed on the air passage A (53).

9. A control method for an oil mist pump assembly, characterized in that: Including the oil mist pump assembly as described in claim 1; the control method includes the following steps; Step 1: Compressed gas passes through the pump body (1). Step two: The compressed gas is divided into three streams; S2.1, One way drives the pump assembly (4) through the valve group (66) to operate, and realizes quantitative oil supply to the nozzle assembly (2) through the counting assembly (3); S2.2, the second path enters the nozzle assembly (2) input end to atomize the lubricating oil; S2.3, the three channels send compressed gas into the output end of the nozzle assembly (2) to perform secondary diffusion output of the atomized lubricating oil; Step 3: The secondary diffusion atomized lubricating oil is output through several branch pipelines.

10. The control method for the oil mist pump assembly according to claim 9, characterized in that: In step one, the gas output from the gas source unit (51) passes through the oil separator (63) and clean air is output to the collection node A (52). In step two, In step S2.1, clean air enters the pump assembly (4) and exits the nozzle assembly (2) through the counting assembly (3). Open the valve assembly (66), and a stream of clean air drives the metering piston (27), overcoming the metering piston spring (28) and compressing the large metering inner cavity (26). At the same time, it compresses the small metering inner cavity (31), causing the lubricating oil to flow downward. This causes the metering steel ball (30) to overcome the metering spring (32) and open, allowing the lubricating oil entering from the metering inlet (29) to be discharged quantitatively through the metering outlet (33) to the venturi inlet (50) of the oil supply pipe (8) and the metering channel (35) to balance the inflow and outflow of lubricating oil. In the counting assembly (3), the lubricating oil enters the counting chamber (18) through the counting inlet (22), which pushes the counting sensor block (20) to move relative to the counting proximity switch (21) to generate a signal change. The lubricating oil passes through the gap between the counting sensor block (20) and the counting chamber (18) and is output through the counting outlet A (16). When the lubricating oil stops intermittently, the counting sensor block (20) is reset under the action of the counting spring (19); In step S2.2, the intake throttle valve (65) enters the nozzle assembly (2) through the air passage B (54); In the nozzle assembly (2); After the clean air passes through the nozzle inlet (41), it passes through the Venturi intermediate air port (45) and the Venturi air inlet (46) and enters the nozzle neck constriction channel (44), which carries the lubricating oil through the Venturi oil inlet (50) into the nozzle neck constriction channel (44). After mixing, the lubricating oil is discharged from the nozzle secondary expansion channel (47). In step S2.3, clean air enters the secondary expansion channel (47) of the nozzle through the secondary radial hole (43) and is discharged from the Venturi oil mist outlet (49).

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