Piston reciprocating type oil viscosity detection sensor

Abstract

The utility model discloses a piston reciprocating type oil viscosity detection sensor which comprises a detection tube, and a piston is coaxially arranged in the detection tube in a sliding mode. The electromagnetic coil coaxially sleeves the peripheries of the two ends of the detection tube; and the ventilation mechanism is arranged on the periphery of the middle part of the detection pipe, the ventilation mechanism comprises a plurality of fan blades, and the fan blades are driven by an electromagnetic coil to rotate. Oil liquid is introduced into the detection pipe, the piston is controlled to reciprocate in the detection pipe through alternate energization of the two electromagnetic coils, the viscosity of the detected liquid can be calculated by recording the reciprocating time of the piston, the electromagnetic coils can drive the ventilation mechanism to operate while driving the piston to move, air circulation is promoted through the fan blades, and the viscosity of the detected liquid can be calculated. Therefore, heat dissipation of the electromagnetic coil is realized, the influence of temperature on oil viscosity is reduced, and the detection precision of the sensor is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sensor technology, and in particular relates to a piston reciprocating oil viscosity detection sensor. Background Technology

[0002] Viscosity is one of the main indicators for evaluating the lubricating performance of lubricating oil, and it is also one of the main bases for selecting lubricating oil. Its changes reflect the comprehensive effects of oxidation, polymerization, dilution, contamination and mechanical shear on the oil.

[0003] Patent CN116499928A discloses an online viscosity sensor. The sensor drives a piston to move via an electromagnet. During its operation, the heating of the electromagnet coil affects the oil temperature. Since the viscosity of the oil is significantly temperature-sensitive, changes in oil temperature will affect its viscosity, causing errors in the oil viscosity detected by the sensor.

[0004] Therefore, it is necessary to improve the existing oil viscosity detection sensors. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a piston reciprocating oil viscosity detection sensor, which reduces the detection error of the sensor.

[0006] To achieve the above objectives, the specific technical solution of the piston reciprocating oil viscosity detection sensor of this utility model is as follows:

[0007] A piston-reciprocating oil viscosity sensor includes:

[0008] The detection tube has a piston that slides coaxially inside it.

[0009] An electromagnetic coil is coaxially sleeved on the outer periphery of both ends of the detection tube;

[0010] A ventilation mechanism is disposed on the outer periphery of the middle part of the detection tube. The ventilation mechanism includes multiple fan blades, and each fan blade is driven to rotate by the electromagnetic coil.

[0011] Preferably, the ventilation mechanism includes a magnetic suction sleeve coaxially sleeved on the outer periphery of the detection tube, each fan blade is circumferentially distributed on the outer periphery of the magnetic suction sleeve, a spiral groove is formed on the outer periphery of the detection tube, and a slider that slides in cooperation with the groove is fixedly connected to the inner wall of the magnetic suction sleeve.

[0012] Preferably, a rotating sleeve is coaxially rotatably disposed on the outer periphery of the magnetic suction sleeve, each of the fan blades is fixed on the outer periphery of the rotating sleeve, and a one-way locking component is disposed between the rotating sleeve and the magnetic suction sleeve.

[0013] Preferably, the one-way locking assembly includes a pawl and a plurality of notches circumferentially distributed around the axis of the detection tube, wherein one of the magnetic sliding sleeve and the rotating sleeve is provided with a notch and the other is provided with a pawl.

[0014] Preferably, annular limiting plates are provided on the outer periphery of both ends of the detection tube, the sliding groove is located between the two limiting plates, and the magnetic coil is located on the side of the limiting plate away from the sliding groove.

[0015] Preferably, the limiting plate has ventilation holes.

[0016] Preferably, a guide groove is formed on the outer peripheral surface of the end of the detection tube. The guide groove is distributed along the axial direction of the detection tube and is circumferentially distributed around the center line of the detection tube.

[0017] Preferably, one end of the guide groove extends to the end face of the detection tube, and the other end passes through the limiting plate.

[0018] Preferably, an outer sleeve is coaxially fixedly connected to the outer periphery of the detection tube, and the ventilation mechanism and the electromagnetic coil are both located inside the outer sleeve.

[0019] Preferably, the outer peripheral surface of the outer sleeve is provided with heat dissipation holes, which penetrate the wall of the outer sleeve.

[0020] The piston reciprocating oil viscosity sensor of this invention has the following advantages: oil is introduced into the detection tube, and the piston is controlled to reciprocate inside the detection tube by alternating energization of two electromagnetic coils. By recording the time of the piston's reciprocating movement, the viscosity of the liquid being measured can be calculated. While the electromagnetic coil drives the piston to move, it can also drive the ventilation mechanism to operate. The fan blades promote air circulation, thereby achieving heat dissipation of the electromagnetic coil, reducing the influence of temperature on the oil viscosity, and improving the detection accuracy of the sensor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sensor structure of this utility model;

[0022] Figure 2 This is an exploded view of the sensor of this utility model;

[0023] Figure 3 This is a schematic diagram of the outer sleeve of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the detection tube of this utility model;

[0025] Figure 5 This is a schematic diagram of the slide groove of this utility model;

[0026] Figure 6 This is a schematic diagram of the mounting structure of the pawl of this utility model;

[0027] Figure 7 This is a schematic diagram of the ventilation mechanism of this utility model;

[0028] The markings in the diagram are as follows: 1. Outer tube; 2. Electromagnetic coil; 3. Detection tube; 4. Piston; 5. Ventilation mechanism; 101. Heat dissipation hole; 301. Slide groove; 302. Limiting plate; 303. Ventilation hole; 304. Guide groove; 501. Magnetic sliding sleeve; 502. Slider; 503. Rotating sleeve; 504. Fan blade; 505. Notch; 506. Pawl. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the oil viscosity detection sensor and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] like Figure 1 and 2 As shown, a piston reciprocating oil viscosity detection sensor includes a detection tube 3, in which a piston 4 is coaxially slidably disposed; an electromagnetic coil 2, coaxially sleeved on the outer periphery of both ends of the detection tube 3; and a ventilation mechanism 5, disposed on the outer periphery of the middle part of the detection tube 3, the ventilation mechanism 5 including multiple fan blades 504, each fan blade 504 being driven to rotate by the electromagnetic coil 2.

[0032] In the aforementioned oil viscosity sensor, the internal space of the detection tube 3 is used to contain the oil to be detected. The piston 4 is a cylindrical structure and a permanent magnet. The two electromagnetic coils 2 located at both ends of the detection tube 3 are coil A and coil B, respectively. During operation, coil A is activated and coil B is deactivated. At this time, coil A attracts the piston 4 to move closer to coil A, while coil B is used to detect the moving distance of the piston 4. The detection principle is that as the piston 4 moves, the magnetic flux through coil B changes, and coil B generates an induced electromotive force. By detecting the induced electromotive force, the moving distance of the piston 4 can be detected. When the piston 4 moves to a predetermined position at coil A, coil B is activated and coil A is deactivated, thereby attracting the piston 4 to move closer to coil B. At this time, coil A is used to detect the moving distance of the piston 4. In this way, the two electromagnetic coils 2 can drive the piston 4 to reciprocate inside the detection tube 3. Since the viscosity of the oil is proportional to the reciprocating time of the piston 4 when the piston 4 is in contact with the oil, the viscosity of the oil can be detected by detecting and collecting the reciprocating time of the piston 4.

[0033] Compared with existing oil viscosity sensors, in this sensor, the magnetic force generated by the electromagnetic coil 2 can drive the fan blade 504 of the ventilation mechanism 5 to rotate, thereby promoting air circulation around the electromagnetic coil 2 through the fan blade 504, thus achieving heat dissipation of the electromagnetic coil 2, reducing the impact of the heating of the electromagnetic coil 2 on the temperature of the oil to be detected, thereby reducing the impact of temperature on the oil viscosity, and improving the accuracy of the sensor in detecting oil viscosity.

[0034] The electromagnetic coil 2 drives the fan blade 504 to rotate in the following way: Figure 5 and 7 As shown, the ventilation mechanism 5 includes a magnetic sleeve 501 coaxially sleeved on the outer periphery of the detection tube 3. Each fan blade 504 is circumferentially distributed on the outer periphery of the magnetic sleeve 501. A spiral groove 301 is formed on the outer periphery of the detection tube 3. A slider 502 that slides in cooperation with the groove 301 is fixedly connected to the inner wall of the magnetic sleeve 501. In the above sensor, the magnetic sleeve 501 is made of iron. When the two electromagnetic coils 2 are alternately activated, the electromagnetic coils 2 attract the magnetic sleeve 501, causing the magnetic sleeve 501 to reciprocate along the axial direction of the detection tube 3. At the same time, the groove 301 guides the slider 502 to rotate around the axis of the detection tube 3, so that the magnetic sleeve 501 rotates while reciprocating, thereby driving the fan blades 504 to rotate, thus promoting airflow and achieving heat dissipation for the electromagnetic coils 2 through airflow.

[0035] Further improvements include, for example Figure 6As shown, a rotating sleeve 503 is coaxially rotatably mounted on the outer periphery of the magnetic suction sleeve 501. Each fan blade 504 is fixed on the outer periphery of the rotating sleeve 503. A one-way locking assembly is provided between the rotating sleeve 503 and the magnetic suction sleeve 501. In this sensor, the rotating sleeve 503 is connected to the magnetic suction sleeve 501 via a bearing. The one-way locking assembly restricts the rotation direction of the rotating sleeve 503. Since the rotation direction of the magnetic suction sleeve 501 changes continuously during its reciprocating movement, the one-way locking assembly can lock the magnetic suction sleeve 501 to the rotating sleeve 503 when rotating in the forward direction, thereby driving the rotating sleeve 503 to rotate. When the magnetic suction sleeve 501 rotates in the reverse direction, it separates from the rotating sleeve 503. At this time, the rotating sleeve 503 can continue to rotate in the forward direction under the action of inertia. Thus, during the reciprocating motion of the magnetic suction sleeve 501, the fan blades 504 can be driven to rotate continuously in the forward direction, thereby providing a continuous airflow in one direction to improve the heat dissipation effect on the electromagnetic coil 2.

[0036] Further improvements include, for example Figure 6 As shown, the one-way locking assembly includes a pawl 506 and multiple notches 505 circumferentially distributed around the axis of the detection tube 3. One of the magnetic sliding sleeve 501 and the rotating sleeve 503 is provided with a notch 505, and the other is provided with a pawl 506. The notches 505 are evenly distributed around the axis of the rotating sleeve 503. The pawl 506 is rotatably connected to the magnetic sleeve 501 through the rotating shaft, and a torsion spring is provided at the connection between the pawl 506 and the rotating shaft. The torsion spring makes the end of the pawl 506 tightly abut against the rotating sleeve 503. When the magnetic sleeve 501 rotates forward, the end of the pawl 506 is inserted into the notch 505, thereby driving the rotating sleeve 503 to rotate through the magnetic sleeve 501. When the magnetic sleeve 501 rotates in reverse, the end of the pawl 506 is disengaged from the notch 505, separating the magnetic sleeve 501 from the rotating sleeve 503. In this way, the rotating sleeve 503 can be continuously driven to rotate forward through the magnetic sleeve 501.

[0037] Further improvements include, for example Figure 4 As shown, both ends of the detection tube 3 are circumferentially provided with annular limiting plates 302. A sliding groove 301 is located between the two limiting plates 302, and the magnetic coil is located on the side of the limiting plate 302 opposite to the sliding groove 301. The limiting plates 302 separate the magnetic sliding sleeve 501 and the electromagnetic coil 2, reducing the probability of collision between them, while also restricting the installation position of the electromagnetic coil 2, improving the accuracy and convenience of installing the electromagnetic coil 2.

[0038] Further improvements include, for example Figure 4 As shown, the limiting plate 302 has ventilation holes 303. The ventilation holes 303 allow the airflow blown out by the fan blades 504 to pass through the ventilation holes 303 and reach the electromagnetic coil 2, thereby improving the heat dissipation effect on the electromagnetic coil 2.

[0039] Further improvements include, for example Figure 4 As shown, a guide groove 304 is formed on the outer circumferential surface of the end of the detection tube 3. The guide groove 304 is distributed along the axial direction of the detection tube 3 and is circumferentially distributed around the axis of the detection tube 3. One end of the guide groove 304 extends to the end face of the detection tube 3, and the other end passes through the limiting plate 302. Multiple guide grooves 304 are arranged around the axis of the detection tube 3. Through the guide grooves 304, airflow can pass through the gap between the electromagnetic coil 2 and the detection tube 3, thereby increasing the heat dissipation area of ​​the electromagnetic coil 2, improving the heat dissipation effect, and also hindering the conduction of heat between the electromagnetic coil 2 and the detection tube 3, so as to reduce the heat conducted to the oil, reduce the impact on the oil viscosity, and improve the detection accuracy of the sensor.

[0040] Further improvements include, for example Figure 1 As shown, an outer sleeve 1 is coaxially fixedly connected to the outer periphery of the detection tube 3. The ventilation mechanism 5 and the electromagnetic coil 2 are both located inside the outer sleeve 1. The outer sleeve 1 is fixedly connected to the limiting plate 302 by screws, and both ends of it are in an open state. The outer sleeve 1 can protect the electromagnetic coil 2 and the fan blade 504, improving the protection performance of the sensor; and a flow channel can be formed between the outer sleeve 1 and the detection tube 3 to guide the airflow, so that the airflow can better contact the electromagnetic coil 2, improving the heat dissipation effect of the electromagnetic coil 2.

[0041] Further improvements include, for example Figure 3 As shown, a heat dissipation hole 101 is provided on the outer peripheral surface of the end of the outer sleeve 1, and the heat dissipation hole 101 penetrates the wall of the outer sleeve 1. The position of the heat dissipation hole 101 matches the position of the electromagnetic coil 2, which is conducive to heat exchange between the electromagnetic coil 2 and the external air, so as to ensure the heat dissipation effect of the electromagnetic coil 2.

[0042] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A piston-reciprocating oil viscosity detection sensor, characterized in that, include: The detection tube (3) has a piston (4) that slides coaxially inside it. An electromagnetic coil (2) is coaxially sleeved on the outer periphery of both ends of the detection tube (3); A ventilation mechanism (5) is located on the outer periphery of the middle part of the detection tube (3). The ventilation mechanism (5) includes multiple fan blades (504), and each fan blade (504) is driven to rotate by the electromagnetic coil (2).

2. The piston reciprocating oil viscosity detection sensor according to claim 1, characterized in that, The ventilation mechanism (5) includes a magnetic sleeve (501) coaxially sleeved on the outer periphery of the detection tube (3), each fan blade (504) is circumferentially distributed on the outer periphery of the magnetic sleeve (501), a spiral groove (301) is provided on the outer periphery of the detection tube (3), and a slider (502) that slides in cooperation with the groove (301) is fixedly connected to the inner wall of the magnetic sleeve (501).

3. The piston reciprocating oil viscosity detection sensor according to claim 2, characterized in that, A rotating sleeve (503) is coaxially rotatably disposed on the outer periphery of the magnetic suction sleeve (501), and each fan blade (504) is fixed on the outer periphery of the rotating sleeve (503). A one-way locking component is disposed between the rotating sleeve (503) and the magnetic suction sleeve (501).

4. The piston reciprocating oil viscosity detection sensor according to claim 3, characterized in that, The one-way locking assembly includes a pawl (506) and a plurality of notches (505) circumferentially distributed around the axis of the detection tube (3). One of the magnetic sliding sleeve (501) and the rotating sleeve (503) is provided with a notch (505), and the other is provided with a pawl (506).

5. The piston reciprocating oil viscosity detection sensor according to claim 2, characterized in that, Both ends of the detection tube (3) are provided with annular limiting plates (302) in the outer periphery. The slide groove (301) is located between the two limiting plates (302). The magnetic coil is located on the side of the limiting plate (302) away from the slide groove (301).

6. The piston reciprocating oil viscosity detection sensor according to claim 5, characterized in that, The limiting plate (302) has ventilation holes (303).

7. The piston reciprocating oil viscosity detection sensor according to claim 5, characterized in that, The outer circumferential surface of the end of the detection tube (3) is provided with a guide groove (304). The guide groove (304) is distributed along the axial direction of the detection tube (3) and is distributed circumferentially around the center line of the detection tube (3).

8. The piston reciprocating oil viscosity detection sensor according to claim 7, characterized in that, One end of the guide groove (304) extends to the end face of the detection tube (3), and the other end passes through the limiting plate (302).

9. The piston reciprocating oil viscosity detection sensor according to claim 1, characterized in that, The outer sleeve (1) is coaxially fixedly connected to the outer periphery of the detection tube (3), and the ventilation mechanism (5) and the electromagnetic coil (2) are both located inside the outer sleeve (1).

10. The piston reciprocating oil viscosity detection sensor according to claim 9, characterized in that, The outer circumferential surface of the end of the outer sleeve (1) is provided with a heat dissipation hole (101), which penetrates the wall of the outer sleeve (1).

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