Electrically controlled plunger type pulse oil pump

Abstract

The present application relates to the field of lubricating oil pump, especially to an electric control plunger type pulse lubricating oil pump, comprising a lubricating oil pump mechanism, comprising a pump body, a coil located inside the pump body, a plunger sleeve penetrating the coil, a plunger rod located inside the plunger sleeve, and an oil inlet interface and an oil outlet interface connected to both ends of the plunger sleeve. The coil is a high-temperature-resistant and wear-resistant electromagnetic coil. After the coil is electrified, an electromagnetic force is generated, which can drive the plunger rod to move axially. The plunger sleeve is a hollow columnar structure, and a through hole adapted to the plunger rod is arranged in the plunger sleeve. The present application can accurately control the oil supply time, frequency and amount through electric pulse control, is suitable for small engines, precision lubrication systems and other scenes requiring intermittent and pulse oil supply, and has wide applicability. After the coil is turned on and off, the electromagnetic force can instantly drive the plunger rod to move, the oil suction and discharge is switched quickly, there is no obvious lag, and the oil supply efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil pumps, and in particular to an electronically controlled plunger-type pulse lubricating oil pump. Background Technology

[0002] The lubricating oil pump is a core oil supply component in various power equipment and hydraulic systems. Its main function is to draw lubricating oil or hydraulic oil from the oil tank and deliver it to various parts of the equipment that require oil, so as to ensure the normal operation, lubrication and cooling of the equipment.

[0003] Existing lubricating pumps mostly adopt a mechanically driven structure, relying on the mechanical transmission of the equipment itself to drive the pump body. This has the following technical defects: the oil supply method is fixed, and it is impossible to achieve pulse oil supply control, making it difficult to adapt to scenarios requiring intermittent oil supply and precise quantity control, such as intermittent lubrication of precision equipment and pulse oil supply needs of small engines, resulting in poor applicability; traditional lubricating pumps mostly use mechanically triggered suction and discharge structures, which have slow response speeds, inflexible suction and discharge switching, and cannot adjust the oil supply rhythm in real time according to equipment operating conditions, resulting in high energy consumption; some electronically controlled lubricating pumps have complex structures, many parts, and are difficult to assemble, and their suction and discharge sealing performance is poor, making them prone to oil leakage and pressure relief problems, affecting the stability of oil supply, while also having high manufacturing costs, which is not conducive to mass production; the return structure design of existing plunger-type lubricating pumps is unreasonable, and the return response is lagging, resulting in unsmooth connection between suction and discharge circulation, affecting the uniformity and reliability of pulse oil supply. Therefore, an electronically controlled plunger-type pulse lubricating pump is proposed. Summary of the Invention

[0004] In view of the problems existing in the above or prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide an electronically controlled plunger-type pulse lubricating oil pump.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including, The lubricating oil pump mechanism includes a pump body, a coil located inside the pump body, a plunger sleeve passing through the coil, a plunger rod located inside the plunger sleeve, and an oil inlet port and an oil outlet port connected to both ends of the plunger sleeve.

[0007] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating pump of the present invention, the coil is a high-temperature resistant and wear-resistant electromagnetic coil. When the coil is energized, it generates electromagnetic force, which can drive the plunger rod to move axially.

[0008] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, wherein: the plunger sleeve is a hollow cylindrical structure, and its interior is provided with a through hole adapted to the plunger rod.

[0009] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, wherein: one end of the plunger rod is connected to a return spring; The return spring is installed at the end of the plunger sleeve away from the coil. One end of the return spring is fixed to the end of the plunger sleeve, and the other end is connected to the end of the plunger rod.

[0010] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, the outer wall of the plunger rod is provided with a sealing groove, and a sealing ring is installed inside the sealing groove to improve the sealing performance between it and the plunger sleeve and prevent oil leakage.

[0011] In a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, both the oil inlet and the oil outlet are connected to external oil pipelines.

[0012] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, wherein: the oil inlet port is used to introduce external oil into the interior of the plunger sleeve; The oil outlet is used to deliver the oil inside the plunger sleeve to the external oil-requiring part.

[0013] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, wherein: a one-way valve mounting groove is provided inside the plunger sleeve at the position corresponding to the oil outlet, and a one-way valve is installed inside the one-way valve mounting groove.

[0014] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, the one-way valve includes a return spring with one end abutting the bottom of the one-way valve mounting groove, and the other end of the return spring abutting a steel ball.

[0015] As a preferred embodiment of the electronically controlled plunger-type pulse lubricating oil pump of the present invention, the steel ball can block the oil outlet channel under the action of the return spring, realize unidirectional flow, and only allow oil to flow from the inside of the plunger sleeve to the oil outlet port, preventing oil backflow.

[0016] The beneficial effects of the electronically controlled plunger pulse lubricating pump of the present invention are as follows: Through electronic pulse control, the timing, frequency, and quantity of oil supply can be precisely controlled, making it suitable for scenarios requiring intermittent, pulsed oil supply, such as small engines and precision lubrication systems, thus offering wide applicability. Furthermore, after the coil is energized and de-energized, the electromagnetic force can instantly drive the plunger rod, resulting in rapid switching between suction and discharge without significant lag, thereby improving oil supply efficiency. Simultaneously, the pump has fewer parts, is easy to assemble, has a low failure rate, and excellent sealing performance, effectively preventing oil leakage and pressure relief, and extending the equipment's service life. Moreover, the simplified structural design reduces the cost of parts processing and assembly, making it suitable for large-scale mass production and widely applicable to various small and medium-sized equipment. Its compact overall size allows it to adapt to scenarios with limited installation space, expanding the equipment's application range. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an electronically controlled plunger-type pulse lubricating oil pump.

[0019] Figure 2 This is a schematic cross-sectional view of an electronically controlled plunger-type pulse lubricating oil pump.

[0020] In the diagram: 100, oil pump mechanism; 101, pump body; 102, coil; 103, plunger sleeve; 104, plunger rod; 105, oil inlet port; 106, oil outlet port; 107, return spring; 108, one-way valve mounting groove; 109, one-way valve component; 109a, return spring; 109b, steel ball. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Example

[0022] Reference Figures 1-2 This is the first embodiment of the present invention, which provides an electronically controlled plunger-type pulse lubricating oil pump, which includes a lubricating oil pump mechanism 100.

[0023] Specifically, the lubricating oil pump mechanism 100 includes a pump body 101, a coil 102 located inside the pump body 101, a plunger sleeve 103 passing through the coil 102, a plunger rod 104 located inside the plunger sleeve 103, and an oil inlet port 105 and an oil outlet port 106 connected to both ends of the plunger sleeve 103. By integrating the coil 102, the plunger sleeve 103 and the plunger rod 104 inside the pump body 101, the overall structure is compact and occupies little space, which can effectively adapt to scenarios with strict requirements for installation space, such as small equipment and precision control systems.

[0024] Furthermore, the coil 102 is a high-temperature resistant and wear-resistant copper core electromagnetic coil with 500-800 turns, a wire diameter of 0.2-0.3mm, and a rated voltage of 12V. It is sleeved on the outer side of the middle part of the plunger sleeve 103. The coil 102 is equipped with an insulating protective sleeve to prevent short circuits. When the coil 102 is energized, it generates electromagnetic force, which can drive the plunger rod 104 to move axially. Since the coil 102 is directly electrically driven, the response lag problem caused by traditional mechanical transmission is avoided. It can adjust the oil supply rhythm in real time according to the equipment operating conditions, thereby achieving precise pulse oil supply control.

[0025] Preferably, the plunger sleeve 103 is made of stainless steel and is a hollow cylinder with an inner diameter of 10-15mm and a length of 50-80mm. The inner wall is precision ground with a surface roughness Ra≤0.8μm. It has a through hole that matches the plunger rod 104. The through hole provides precise motion guidance for the plunger rod 104, ensuring that the plunger rod 104 maintains good coaxiality during reciprocating sliding, thereby reducing wear and improving sealing reliability.

[0026] Furthermore, the plunger rod 104 is made of carbon steel, with a diameter that matches the inner diameter of the plunger sleeve 103 (gap of 0.01-0.02mm), and a length of 60-90mm. One end is connected to the return spring 107, and the other end is a smooth end that extends into the coil 102. The outer wall of the plunger rod 104 has a sealing groove, into which a nitrile rubber sealing ring is embedded to improve the sealing performance. Meanwhile, the return spring 107 is made of stainless steel with an elastic coefficient of 8-12N / mm and a length of 20-30mm. It is installed on the end of the plunger sleeve 103 away from the coil 102. One end of the return spring 107 is fixed to the end of the plunger sleeve 103, and the other end is connected to the end of the plunger rod 104. When the coil 102 is de-energized, the return spring 107 can quickly provide a reset force to push the plunger rod 104 downward to reset, ensuring that the oil suction action is completed quickly, making the oil suction and discharge cycle smooth and effectively improving the uniformity of pulse oil supply.

[0027] The outer wall of the plunger rod 104 is provided with a sealing groove, and a sealing ring is installed inside the sealing groove to improve the sealing performance between it and the plunger sleeve 103 and prevent oil leakage. This sealing structure fits precisely with the inner wall of the plunger sleeve 103, which can significantly reduce the risk of internal leakage during high-pressure oil supply and ensure oil output pressure and oil supply stability.

[0028] Both the inlet port 105 and the outlet port 106 are connected to external oil pipelines and are made of brass. Both are external threaded connectors (M10×1 thread specification), fixed to the corresponding ends of the plunger sleeve 103 via threaded connection. A sealing ring is provided inside the connector to prevent oil leakage at the connection point and reduce assembly difficulty. The inlet port 105 is used to introduce external oil into the plunger sleeve 103, automatically drawing oil using the negative pressure generated by the downward movement of the plunger rod 104, requiring no additional power. The outlet port 106 is used to deliver the oil inside the plunger sleeve 103 to the external oil-requiring location. With the control of the one-way valve, pulsed oil supply is ensured on-demand. The overall structure is simple and reliable, effectively solving the problems of narrow applicability, slow response, and poor sealing performance of existing lubricating pumps.

[0029] In use, when the external control circuit energizes the coil 102, the coil 102 generates an electromagnetic force. This electromagnetic force overcomes the elastic force of the return spring 107, driving the plunger rod 104 to move upward along the axial direction of the plunger sleeve 103, squeezing the oil inside the plunger sleeve 103, increasing the oil pressure and opening the one-way valve. The oil is then output through the oil outlet 106 to the external oil-requiring part, completing one pulse oil supply action. When the control circuit cuts off the power supply to the coil 102, the electromagnetic force disappears instantaneously, and the plunger rod 104... Under the elastic force of the return spring 107, the plunger sleeve 103 quickly moves downward to reset, creating a negative pressure inside. Under atmospheric pressure, external oil is drawn into the plunger sleeve 103 through the oil inlet 105. At the same time, the one-way valve automatically closes under the action of the return spring 109a to prevent oil backflow and prepare for the next oil supply. By controlling the on and off frequency of the coil 102, the periodic reciprocating motion of the plunger rod 104 can be achieved, thereby outputting pulse-type lubricating oil with adjustable frequency and oil supply.

[0030] In summary, the reciprocating motion of the plunger rod 104 is achieved by electrically driving the coil 102, which eliminates the traditional mechanical transmission structure and significantly improves the oil supply response speed. The on / off frequency can be adjusted in real time according to the equipment operating conditions to achieve precise and controllable pulse oil supply, which is perfectly suited for scenarios such as small engines and precision lubrication systems that require intermittent oil supply.

[0031] Example 2, refer to Figures 1-2 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an air outlet regulating mechanism 300 for an electronically controlled plunger-type pulse lubricating oil pump.

[0032] Specifically, a one-way valve mounting groove 108 is provided inside the plunger sleeve 103 at the position corresponding to the oil outlet 106. A one-way valve component 109 is installed inside the one-way valve mounting groove 108. The mounting groove provides precise positioning and stable installation space for the one-way valve component 109, ensuring that the valve component does not shift during operation, thereby effectively solving the problems of unstable one-way valve assembly and poor sealing consistency in traditional lubricating oil pumps.

[0033] Furthermore, the one-way valve 109 includes a return spring 109a with one end abutting against the bottom of the one-way valve mounting groove 108. The return spring 109a is made of stainless steel with an elastic coefficient of 5-10 N / mm and a length of 10-15 mm. The other end of the return spring 109a abuts against a steel ball 109b. The steel ball 109b is made of bearing steel with a diameter of 5-8 mm, which is compatible with the inner diameter of the oil outlet port 106. It can tightly seal the oil outlet channel. The preload of the return spring 109a ensures that the steel ball 109b and the sealing surface of the oil outlet channel always remain in close contact. This matching method has a simple structure and sensitive response, avoiding the jamming or delay caused by complex mechanical triggering structures, and significantly improving the reliability of oil suction and discharge switching.

[0034] The steel ball 109b can block the oil outlet channel under the action of the return spring 109a, realizing one-way flow and allowing oil to flow only from the inside of the plunger sleeve 103 to the oil outlet port 106, preventing oil backflow. When the plunger rod 104 moves upward to press oil, the oil pressure overcomes the elastic force of the return spring 109a to push the steel ball 109b away from the sealing surface, and the oil is output smoothly. When the plunger rod 104 moves downward to suck oil, the return spring 109a quickly pushes the steel ball 109b back to block the channel, eliminating the risk of high-pressure oil backflow into the plunger sleeve 103, ensuring the accuracy of oil quantity and pressure stability of each pulse oil supply. At the same time, the surface of the steel ball 109b is polished, and its fit with the oil outlet channel is extremely high, further improving the sealing performance and effectively avoiding oil leakage and pressure relief failures.

[0035] In use, when the external control circuit supplies 12V DC power to coil 102, coil 102 generates electromagnetic force. This electromagnetic force overcomes the elastic force of return spring 107, driving plunger rod 104 to move upward, squeezing the oil inside plunger sleeve 103, making the oil pressure reach 0.3-0.5MPa. At this time, the oil pressure overcomes the elastic force of return spring 109a, pushing steel ball 109b upward, opening the one-way valve, and the oil is output through oil outlet 106, realizing pulse oil output; when the control circuit cuts off the power supply, coil 102... 02 When the electromagnetic force disappears, the plunger rod 104 returns to its original position under the elastic force of the return spring 107, and a negative pressure is formed inside the plunger sleeve 103 (the negative pressure value is -0.05 to -0.08 MPa). External oil is drawn into the plunger sleeve 103 through the oil inlet port 105. At the same time, the return spring 109a pushes the steel ball 109b to return to its original position, blocking the oil outlet channel and completing the oil suction. By controlling the frequency of the energization of the control coil 102 (1-10 times / second), pulse oil supply at different frequencies can be achieved to adapt to the oil supply needs of different equipment.

[0036] In summary, the one-way valve composed of steel ball 109b and return spring 109a effectively prevents oil leakage and backflow, ensuring the sealing reliability and oil supply stability of the oil suction and discharge process. The clear division of labor between return spring 107 and return spring 109a ensures smooth connection between plunger rod 104 reset and one-way valve closure, improving the uniformity of pulse oil supply. The overall structure is compact, with fewer parts, easy assembly, reduced manufacturing costs and failure rate, small footprint, and is suitable for mass production and widespread application in various small and medium-sized equipment. Example

[0037] The difference between this embodiment and Embodiment 1 is that: The coil 102 is a copper core electromagnetic coil with a rated voltage of 24V, 800-1000 turns, and a wire diameter of 0.3-0.4mm. It has a stronger electromagnetic force and can drive a larger diameter plunger rod 104. The inner diameter of the plunger sleeve 103 is 15-20mm, which is adapted to the diameter of the plunger rod 104. The elastic coefficient of the return spring 107 is adjusted to 12-15N / mm, and the elastic coefficient of the reset spring 109a is adjusted to 10-15N / mm. The inlet and outlet oil interfaces 106 adopt internal threaded joints (thread specification is 12×1.25) to adapt to oil pipelines with larger flow rates.

[0038] The working process of this embodiment is basically the same as that of embodiment 1. The difference is that the electromagnetic force generated after the coil 102 is energized is greater, the piston rod 104 moves upward faster, the oil output pressure can reach 0.5-0.8MPa, and the oil supply is greater. It is suitable for scenarios with high requirements for oil supply and oil supply pressure, such as small hydraulic control systems.

[0039] It should be noted that the coil 102 of the present invention can be adapted to different rated voltages (such as 12V, 24V, 36V) according to actual needs, and the number of turns and wire diameter of the coil 102 can be adjusted to change the magnitude of the electromagnetic force and adapt to different specifications of plunger rods 104. Furthermore, metal components such as plunger sleeve 103, plunger rod 104, and steel ball 109b can be made of different materials (such as stainless steel, carbon steel, aluminum alloy, etc.) and selected according to the corrosion and pressure requirements of the application scenario. Meanwhile, the elastic coefficients of the return spring 107 and the reset spring 109a can be adjusted according to the weight of the plunger rod 104, the required return speed, and the oil outlet pressure to ensure smooth oil suction and discharge circulation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An electronically controlled plunger-type pulse lubricating oil pump, characterized in that: include, The lubricating oil pump mechanism (100) includes a pump body (101), a coil (102) located inside the pump body (101), a plunger sleeve (103) passing through the coil (102), a plunger rod (104) located inside the plunger sleeve (103), and an oil inlet port (105) and an oil outlet port (106) connected to both ends of the plunger sleeve (103).

2. The electronically controlled plunger-type pulse lubricating pump as described in claim 1, characterized in that: The coil (102) is a high-temperature resistant and wear-resistant electromagnetic coil (102). When the coil (102) is energized, it generates electromagnetic force, which can drive the plunger rod (104) to move axially.

3. The electronically controlled plunger-type pulse lubricating pump as described in claim 2, characterized in that: The plunger sleeve (103) is a hollow cylindrical structure with a through hole inside that is adapted to the plunger rod (104).

4. The electronically controlled plunger-type pulse lubricating pump as described in claim 3, characterized in that: One end of the plunger rod (104) is connected to a return spring (107). The return spring (107) is installed on the end of the plunger sleeve (103) away from the coil (102). One end of the return spring (107) is fixed to the end of the plunger sleeve (103), and the other end is connected to the end of the plunger rod (104).

5. The electronically controlled plunger-type pulse lubricating pump as described in claim 4, characterized in that: The outer wall of the plunger rod (104) is provided with a sealing groove, and a sealing ring is installed inside the sealing groove to improve the sealing performance between it and the plunger sleeve (103) and prevent oil leakage.

6. The electronically controlled plunger-type pulse lubricating pump as described in claim 5, characterized in that: Both the oil inlet (105) and the oil outlet (106) are connected to external oil pipelines.

7. The electronically controlled plunger-type pulse lubricating pump as described in claim 6, characterized in that: The oil inlet (105) is used to introduce external oil into the plunger sleeve (103); The oil outlet (106) is used to transport the oil inside the plunger sleeve (103) to the external oil-requiring part.

8. The electronically controlled plunger-type pulse lubricating pump as described in claim 7, characterized in that: The plunger sleeve (103) has a one-way valve mounting groove (108) at the position corresponding to the oil outlet (106), and a one-way valve component (109) is installed inside the one-way valve mounting groove (108).

9. The electronically controlled plunger-type pulse lubricating pump as described in claim 8, characterized in that: The one-way valve (109) includes a return spring (109a) with one end abutting the bottom of the one-way valve mounting groove (108), and the other end of the return spring (109a) abutting a steel ball (109b).

10. The electronically controlled plunger-type pulse lubricating pump as described in claim 9, characterized in that: The steel ball (109b) can block the oil outlet channel under the action of the return spring (109a) to achieve one-way flow, allowing oil to flow from the inside of the plunger sleeve (103) to the oil outlet port (106) and preventing oil backflow.

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