A motor-driven control quantitative electric oil feeder

Abstract

This utility model relates to the field of oiler technology and discloses a quantitative electric oiler driven and controlled by a motor, comprising: an oiler body, wherein a flow control part and a direction control part are disposed within the oiler body; the flow control part includes a flow control valve core capable of reciprocating linear motion within the oiler body, the two ends of the flow control valve core defining a left oil chamber and a right oil chamber respectively, and a plug is disposed inside the oiler body near the left oil chamber; the direction control part includes a direction control valve core capable of rotating within the oiler body. In this utility model, the valve core is rotated and reversed by a motor. Its rotational action can shear and expel impurities in the oil, eliminating the risk of valve core jamming. Compared with traditional hydraulic spool valves, the motor-driven forced reversing is more decisive and reliable, and is not affected by oil pressure fluctuations, greatly improving the operational stability of the equipment and ensuring long-term trouble-free oil supply.

Description

Technical Field

[0001] This utility model relates to the field of oiler technology, and in particular to a quantitative electric oiler driven and controlled by a motor. Background Technology

[0002] In large-scale machinery, heavy industrial equipment, and automated production lines, centralized lubrication systems are crucial subsystems for ensuring normal equipment operation, extending service life, and reducing maintenance costs. Among these systems, the quantitative electric lubricator, as the core actuator, primarily functions to precisely and reliably deliver a fixed amount of lubricant (especially dry oil, i.e., grease) to each moving part requiring lubrication according to a preset program. Therefore, developing a precise, stable, and highly reliable quantitative electric lubricator is of great significance for improving the efficiency of the entire lubrication system and ensuring the safety of the main equipment.

[0003] In existing technologies, some metering lubricators employ a purely hydraulic control method to achieve internal flow path switching. These devices typically incorporate a linear slide valve-type main valve core driven by the lubricant's own pressure. Its working principle is as follows: when high-pressure lubricant from the main oil circuit enters the lubricator, its pressure acts on one end of the main valve core, pushing it to slide linearly axially within the valve body. When the valve core moves from the first position to the second position, the fit between the groove on the valve body and the oil port of the valve sleeve changes, thereby switching the internal oil circuit and guiding the lubricant to different metering chambers. After one cycle is completed, the system, through pressure changes or control of another pilot oil path, pushes the main valve core to slide in the opposite direction again, preparing for the next cycle. The driving force for the entire reversing process comes entirely from the hydraulic action of the lubricant.

[0004] However, the aforementioned reversing structure, which relies on the lubricant's own pressure to drive the main valve core in linear reciprocating motion, has inherent reliability defects in practical applications. Due to the relatively complex industrial environment, dust, metal shavings, or other solid particulate impurities inevitably mix into the lubricant during storage, transportation, and filling. When these hard particles enter the lubricator along with the lubricant, they are easily carried into the precision fit gap between the main valve core and the valve orifice. During linear sliding, these particles easily wedge into the gap, causing a sharp increase in motion resistance. Once this resistance exceeds the hydraulic driving force provided by the lubricant, it will cause the main valve core to sluggish movement or even completely jam in the middle position, failing to complete the intended reversing action. This valve core jamming failure directly interrupts the lubrication process, preventing one or more downstream lubrication points from receiving lubrication, thus causing dry friction in the equipment, resulting in abnormal wear or even serious accidents such as burnout. Therefore, a quantitative electric lubricator driven by a motor is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a quantitative electric oiler driven and controlled by a motor, which aims to improve the existing linear slide valve driven by lubricant pressure. Due to the easy entry of impurities in the oil into the gap between the valve core and the valve hole and the formation of a wedging, the valve core will stick and fail to switch, which will interrupt lubrication and cause equipment wear or even burnout.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quantitative electric oiler controlled by a motor, comprising: an oiler body, wherein a flow control part and a direction control part are provided in the oiler body;

[0007] The flow control section includes a flow control valve core that can reciprocate linearly within the oiler body. The two ends of the flow control valve core define a left oil chamber and a right oil chamber, respectively. A plug is provided inside the oiler body near the left oil chamber.

[0008] The directional control section includes a directional control valve core that can rotate within the oiler body, and a drive motor for driving the directional control valve core to rotate.

[0009] An oil outlet control base connected to the oiler body is provided with a main oil inlet and two oil outlets, one and two oil outlets.

[0010] The directional control valve core is connected to the main oil inlet, the left oil chamber and the right oil chamber, and is used to selectively introduce pressurized oil from the main oil inlet into the left oil chamber or the right oil chamber by rotating and switching.

[0011] It also includes a flow sensor configured to sense the reciprocating linear motion of the flow control valve core.

[0012] As a further description of the above technical solution:

[0013] The directional control valve core is a cylindrical valve core with an internal connecting oil passage. The drive motor drives the directional control valve core to switch between a first angular position and a second angular position to change the conduction state of the connecting oil passage.

[0014] As a further description of the above technical solution:

[0015] The included angle of rotation between the first angular position and the second angular position is 90°.

[0016] As a further description of the above technical solution:

[0017] The flow control valve core is a piston that slides within a valve orifice arranged along its axis. The two ends of the valve orifice are respectively connected to the left oil chamber and the right oil chamber.

[0018] As a further description of the above technical solution:

[0019] The flow sensor is located on the stroke path of the flow control valve core and is used to detect whether the flow control valve core has moved to the end position of its stroke.

[0020] As a further description of the above technical solution:

[0021] The oil outlet control base is provided with a first oil outlet and a second oil outlet; the first oil outlet is connected to the oil outlet passage of the left oil chamber, and the second oil outlet is connected to the oil outlet passage of the right oil chamber.

[0022] As a further description of the above technical solution:

[0023] The valve orifice accommodating the flow control valve core and the valve orifice accommodating the direction control valve core are both located within the same integral structure of the oiler body.

[0024] As a further description of the above technical solution:

[0025] The output shaft of the drive motor is directly connected to one end of the directional control valve core, and the drive motor is fixedly mounted on the oiler body.

[0026] This utility model has the following beneficial effects:

[0027] 1. In this invention, the directional control valve core rotates under the action of a drive motor. This rotational motion shears and displaces any solid particulate impurities, preventing their accumulation in the precise gap between the valve core and the valve orifice, thus preventing directional failure due to jamming. Compared to traditional linear slide valves driven by hydraulic pressure, the directional action of this invention is forcibly executed by a motor, resulting in more decisive and reliable action, unaffected by oil pressure fluctuations. This significantly improves the operational stability and environmental adaptability of the equipment under complex working conditions, ensuring that the lubrication system can continuously supply oil to the lubrication points for a long period without failure.

[0028] 2. In this invention, a flow control valve core acts as a metering piston, with each complete reciprocating linear motion corresponding to a precise oil discharge volume determined by its physical dimensions. A flow sensor monitors in real time whether the piston has completed its entire stroke. Only when the sensor confirms that the piston has reached its designated position does the system determine that a metered amount of lubricating oil has been discharged. This design transforms oil supply confirmation from indirect logical judgment to direct physical displacement detection, completely eliminating the problems of inaccurate oil supply or supply failure that may be caused by unstable system pressure, changes in oil viscosity, or internal leakage, thereby ensuring highly accurate and reliable oil supply to the lubrication points of critical equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the oil outlet control base of a quantitative electric oiler driven and controlled by a motor, as proposed in this utility model.

[0030] Figure 2 This is a schematic diagram of the partial structure of the oiler body of a quantitative electric oiler driven and controlled by a motor, as proposed in this utility model.

[0031] Legend:

[0032] 1. Drive motor; 2. Oil feeder body; 3. Left oil chamber; 4. Right oil chamber; 5. Flow control valve core; 6. Flow sensor; 7. Direction control valve core; 8. Oil outlet control base; 9. Oil outlet one; 10. Main oil inlet; 11. Oil outlet two; 12. Plug. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-2This utility model provides an embodiment of a quantitative electric lubricator driven and controlled by a motor, comprising: a lubricator body 2, which serves as the basic supporting structure of the entire device, integrating and ensuring the precise positional relationship of the internal functional components; the lubricator body 2 also integrates a flow control section and a direction control section; the flow control section includes a flow control valve core 5 that can reciprocate linearly within the lubricator body 2, which acts as an actuator for quantitative oil discharge, with each complete stroke corresponding to a precise oil discharge volume; the two ends of the flow control valve core 5 define a left oil chamber 3 and a right oil chamber 4 for storing and discharging lubricant, respectively; a plug 12 is also provided inside the lubricator body 2 near the left oil chamber 3, which effectively seals the valve chamber where the flow control valve core 5 is located, forming a closed volume; the direction control section includes a directional control component that can rotate within the lubricator body 2. The device includes a directional control valve core 7 and a drive motor 1 that provides active, forced power for the reversing action. The drive motor 1 is used to precisely drive the directional control valve core 7 to rotate. An oil outlet control base 8 is connected to the oiler body 2. This oil outlet control base 8 serves as a connection base for external pipelines and integrates a main oil inlet 10 for receiving high-pressure lubricant, and oil outlets 9 and 11 for delivering lubricant to external lubrication points. The directional control valve core 7 is connected to the main oil inlet 10, the left oil chamber 3, and the right oil chamber 4 via an internal oil passage. Its core function is to selectively introduce pressurized oil from the main oil inlet 10 into the left oil chamber 3 or the right oil chamber 4 through controlled rotation switching, thereby driving the flow control valve core 5 to move. The device also includes a flow sensor 6, which serves as a feedback element and is configured to sense the reciprocating linear motion of the flow control valve core 5 in real time to confirm whether the quantitative action has been truly completed.

[0035] Reference Figures 1-2To achieve reliable reversing, the directional control valve core 7 is specifically a cylindrical valve core, the shape of which is suitable for rotary sealing. It has an internal connecting oil passage. The drive motor 1 drives the directional control valve core 7 to switch between a first angular position and a second angular position, changing the conduction state of the internal connecting oil passage by changing the valve core angle. To achieve clear and precise flow path switching, the included angle between the first and second angular positions is preferably 90°. To achieve accurate metering, the flow control valve core 5 is specifically a piston that slides within a valve hole precisely machined along its axis. The two ends of this valve hole are respectively connected to the left oil chamber 3 and the right oil chamber 4, thus forming a standard piston-type metering structure. To achieve closed-loop monitoring of the metering process, the flow sensor 6 is specifically positioned on the stroke path of the flow control valve core 5 for accurate... The system detects whether the flow control valve core 5 has moved to the end of its stroke. To achieve separate oil supply to the two lubrication points, the oil outlet control base 8 is provided with a first oil outlet and a second oil outlet. The first oil outlet is connected to the left oil chamber 3 through an internal oil outlet passage, and the second oil outlet is connected to the right oil chamber 4 through an internal oil outlet passage, forming two independent outputs. To enhance structural strength and compactness, the valve hole accommodating the flow control valve core 5 and the valve hole accommodating the directional control valve core 7 are both located inside the same integral structure of the oiler body 2, reducing assembly steps and potential leakage points. To improve transmission efficiency and reliability, the output shaft of the drive motor 1 adopts a direct drive method that is directly connected to one end of the directional control valve core 7, and the drive motor 1 is securely mounted on the oiler body 2 through a flange or bracket.

[0036] Specifically, firstly, the drive motor 1 forces the directional control valve core 7 to rotate and reverse. This rotational motion shears and displaces impurities, fundamentally solving the jamming problem caused by impurities in the oil in traditional slide valves and ensuring the absolute reliability of the reversing action. Secondly, a piston-type flow control valve core 5 performs quantitative oil discharge, and a flow sensor 6 detects the end of its stroke, forming a closed-loop monitoring system for the oil discharge process, ensuring the authenticity and high accuracy of each oil supply.

[0037] Working Principle: When this quantitative electric oiler is needed, firstly, external high-pressure lubricating oil enters the device through the main oil inlet 10 on the oil outlet control base 8. At the initial stage of a working cycle, the drive motor 1 controls the directional control valve core 7 to remain in the first angular position. In this position, the connecting oil passage inside the directional control valve core 7 guides the high-pressure oil from the main oil inlet 10 to the left oil chamber 3. The continuously increasing pressure in the left oil chamber 3 pushes the flow control valve core 5 to slide linearly to the right within the valve orifice. During the movement of the flow control valve core 5 to the right, its right end extrudes the pre-stored quantitative lubricating oil from the right oil chamber 4 through the corresponding internal oil outlet passage from the oil outlet 11, completing the oil supply to one lubrication point. When the flow control valve core 5 reaches the end of its stroke, the flow sensor 6 is triggered, sending a signal to the control system indicating that a quantitative supply is complete.

[0038] Secondly, upon receiving the signal, the control system drives the motor 1 to rotate the directional control valve core 7 90° to the second angle position. In this position, the oil circuit inside the directional control valve core 7 is switched, and the high-pressure oil is directed to the right oil chamber 4. At this time, the continuously increasing pressure in the right oil chamber 4 pushes the flow control valve core 5 to slide linearly to the left. During this leftward movement, its left end squeezes the lubricating oil in the left oil chamber 3 through another oil outlet passage from the outlet 9, completing the oil supply to another lubrication point. When the flow control valve core 5 returns to its initial position and is detected again by the flow sensor 6, a complete working cycle ends.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quantitative electric oil feeder controlled by a motor, characterized in that, include: A lubricator body (2), wherein a flow control section and a direction control section are provided inside the lubricator body (2); The flow control section includes a flow control valve core (5) that can reciprocate linearly within the oiler body (2). The two ends of the flow control valve core (5) define the left oil chamber (3) and the right oil chamber (4) respectively. A plug (12) is provided inside the oiler body (2) on the side near the left oil chamber (3). The directional control section includes a directional control valve core (7) that can rotate within the oiler body (2), and a drive motor (1) for driving the directional control valve core (7) to rotate. An oil outlet control base (8) connected to the oiler body (2) is provided with a main oil inlet (10) and an oil outlet one (9) and an oil outlet two (11). The directional control valve core (7) is connected to the main oil inlet (10), the left oil chamber (3) and the right oil chamber (4), and is used to selectively introduce the pressure oil from the main oil inlet (10) into the left oil chamber (3) or the right oil chamber (4) by rotating and switching. It also includes a flow sensor (6) which is configured to sense the reciprocating linear motion of the flow control valve core (5).

2. The quantitative electric oil feeder controlled by a motor according to claim 1, characterized in that: The directional control valve core (7) is a cylindrical valve core with an internal connecting oil circuit. The drive motor (1) drives the directional control valve core (7) to switch between a first angular position and a second angular position to change the conduction state of the connecting oil circuit.

3. A quantitative electric oil feeder controlled by a motor according to claim 2, characterized in that: The included angle of rotation between the first angular position and the second angular position is 90°.

4. A quantitative electric oil feeder controlled by a motor according to claim 1, characterized in that: The flow control valve core (5) is a piston that slides in a valve hole arranged along its axis. The two ends of the valve hole are connected to the left oil chamber (3) and the right oil chamber (4) respectively.

5. A quantitative electric oil feeder controlled by a motor according to claim 4, characterized in that: The flow sensor (6) is located on the stroke path of the flow control valve core (5) and is used to detect whether the flow control valve core (5) has moved to the end position of its stroke.

6. A quantitative electric oil feeder controlled by a motor according to claim 1, characterized in that: The oil outlet control base (8) is provided with a first oil outlet and a second oil outlet; the first oil outlet is connected to the oil outlet passage of the left oil chamber (3), and the second oil outlet is connected to the oil outlet passage of the right oil chamber (4).

7. A quantitative electric oil feeder controlled by a motor according to claim 1, characterized in that: The valve hole that accommodates the flow control valve core (5) and the valve hole that accommodates the direction control valve core (7) are both located inside the same integral structure of the oiler body (2).

8. A quantitative electric oil feeder controlled by a motor according to claim 1, characterized in that: The output shaft of the drive motor (1) is directly connected to one end of the directional control valve core (7), and the drive motor (1) is fixedly installed on the oiler body (2).

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