A high temperature high shear viscometer with a protective shield

Abstract

The utility model discloses a high temperature high shear viscometer with protective cover, including frame, sample injection hopper, sample feeding pipe, ball type sleeve, drive arrangement, temperature probe, oil return pipe, stator and rotor, wherein, ball type sleeve installs on the workstation of frame, and its inside is equipped with oil storage cavity, the inside installation of oil storage cavity has the rotor and stator, the upper portion of rotor and drive arrangement transmission connection, the both ends of sample feeding pipe are connected sample injection hopper and ball type sleeve respectively, temperature probe stretches into the oil storage cavity, one end of oil return pipe stretches into the oil storage cavity, and the other end is connected oil storage tank, still including the protective cover, the protective cover installs in the upper portion of ball type sleeve, and it is left cover body and right cover body, left cover body and right cover body combine and form the complete protective cover, the protective cover is equipped with the axial deferral perforation, and the deferral perforation is the ladder hole structure of small up and big down, the utility model discloses have simple structure, can effectively reduce the rotor dust, the advantages such as heat preservation and moisture reduction.

Description

Technical Field

[0001] This utility model relates to the field of engine oil viscosity measurement technology, and in particular to a high-temperature high-shear viscometer with a protective cover. Background Technology

[0002] Imported equipment, such as the Ravenfcld BS / C fully automatic high-temperature high-shear viscometer, is the mainstream choice for viscosity testing in the industry.

[0003] Domestic manufacturers have also conducted some research in the field of viscometers. For example, the existing patent document CN206557045U discloses a fully automatic high-temperature high-shear viscosity meter. Through the arrangement of a heating furnace chamber, capillary tube, temperature sensor, solenoid valve assembly frame, air inlet pipe, air tank, pressure sensor, and control circuit board, it can automatically achieve long-term constant temperature and pressure control, leakage protection, high accuracy, and improved equipment safety. It can gradually replace imported products in operation. Another example is the existing patent document CN214066833U, which discloses a high-temperature high-shear viscosity meter for lubricating oil.

[0004] The operating procedure for the Ravenfcld BS / C type high-temperature high-shear viscometer is as follows: the oil sample is injected into the gap between the rotor and stator inside the spherical sleeve. The two adopt a conical fit structure. The shear rate is controlled by adjusting the gap parameter. The rotor is driven to rotate at a set speed, and its reaction torque value is collected. Then, combined with the standard curve calibrated with Newtonian standard oil, the dynamic viscosity of the sample is calculated. The conventional test temperature is set to 150℃.

[0005] However, the core area of ​​the rotor shearing oil in this imported equipment lacks protective devices, making it susceptible to interference from the following factors during use, which can affect its detection performance and equipment lifespan:

[0006] Dust contamination impact: The instrument has extremely high precision, with rotor speeds reaching 10... 6 / s, if dust particles come into contact with the high-speed rotating rotor or remain in the gap between the rotor and the stator, they can easily cause rotor wear and damage, reducing detection accuracy.

[0007] Airflow interference: When the rotor rotates at high speed, the surrounding airflow disturbance will disrupt the temperature stability of the detection area, resulting in large fluctuations in the test data. It often takes several hours to stabilize the temperature before effective testing can be carried out.

[0008] Humidity corrosion: After the test, the area where the rotor shears the oil is prone to absorbing moisture in a high humidity environment, which can cause rust damage to the rotor. The replacement cost of the original rotor is relatively high.

[0009] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0010] The main purpose of this invention is to propose a high-temperature, high-shear viscosity meter with a protective cover that has a simple structure, effectively reduces dust ingress into the rotor, provides heat preservation and moisture protection.

[0011] Therefore, this utility model proposes a high-temperature high-shear viscosity meter with a protective cover.

[0012] Preferably, the present invention may also have the following technical features:

[0013] A high-temperature, high-shear viscometer with a protective cover includes a frame, a sample inlet funnel, a sample delivery tube, a spherical sleeve, a drive unit, a temperature probe, an oil return pipe, a stator, and a rotor. The spherical sleeve is mounted on the worktable of the frame and has an internal oil storage chamber. The rotor and stator are installed inside the oil storage chamber, and the upper part of the rotor is connected to the drive unit. The lower end of the sample inlet funnel is connected to the upper end of the sample delivery tube, and the lower end of the sample delivery tube communicates with the interior of the spherical sleeve. The temperature probe extends from the upper part of the spherical sleeve into the oil storage chamber. One end of the oil return pipe extends into the oil storage chamber, and the other end is connected to an oil tank. The device also includes a protective cover mounted on the upper part of the spherical sleeve. The protective cover consists of a left cover and a right cover, which are combined to form a complete protective cover. The protective cover has axial clearance perforations with a stepped hole structure that is smaller at the top and larger at the bottom.

[0014] Furthermore, the inner diameter of the large end of the perforation matches the outer diameter of the spherical sleeve, and the small end surrounds the upper part of the rotor, the oil return pipe, and the temperature probe.

[0015] Furthermore, the left and right covers are connected and fixed by a snap-fit ​​mechanism.

[0016] Furthermore, the buckle structure is a shaft hole connection structure, which includes a first cylinder on each side of the left cover, a second cylinder on each side of the right cover corresponding to the position of the first cylinder, and an L-shaped shaft penetrating the first cylinder and the second cylinder.

[0017] Furthermore, after the left and right covers are combined, the centers of the first and second cylinders are coaxial.

[0018] Furthermore, it also includes a cap, which is installed at the upper opening of the sample inlet funnel.

[0019] Furthermore, a portion of the return oil pipe is fitted with a protective sleeve.

[0020] Furthermore, the protective cover is made of plexiglass.

[0021] Furthermore, the left and right covers are connected and positioned by magnetic attraction.

[0022] Furthermore, the upper end of the protective cover abuts against the frame body directly above the spherical sleeve, and its side is also provided with clearance holes for the oil return pipe and temperature probe.

[0023] The beneficial effects of this utility model compared with the prior art include: the perforation is installed on the spherical sleeve through its stepped surface, and its upper diameter is reduced, which can effectively reduce the risk of dust entering the rotor. At the same time, it can also prevent the sample from splashing onto the upper surface of the spherical sleeve when the rotor is stirring the sample, thus improving the cleanliness of the test. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a high-temperature, high-shear viscometer based on existing technology.

[0025] Figure 2 This is a schematic diagram of the structure of this utility model.

[0026] Figure 3 This is a structural diagram of the protective cover of this utility model.

[0027] Figure 4 This is a top view of the protective cover of this utility model.

[0028] Figure 5 This is a structural diagram of the left cover of this utility model.

[0029] Figure 6 This is a structural diagram of the right cover of this utility model.

[0030] Figure 7 This is a perspective view of another embodiment of the protective cover of this utility model.

[0031] Figure 8 yes Figure 7 Top view of the protective cover. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0033] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0034] like Figure 2-6 The high-temperature, high-shear viscometer with a protective cover shown includes a frame 5, a sample inlet funnel 3, a sample delivery tube 2, a spherical sleeve 10, a drive unit, a temperature probe 9, an oil return pipe 8, a stator, and a rotor 6. The spherical sleeve 10 is mounted on the worktable 1 of the frame 5 and has an internal oil storage chamber 13. The rotor 6 and stator are installed inside the oil storage chamber 13, with the upper part extending through the upper side of the sleeve 10 and communicating with the environment for easy observation of the sample liquid level in the oil storage chamber 13 and for easy connection of the upper part of the rotor 6 to the drive unit. The rotor 6 and stator are fitted with a conical joint. The upper part of the rotor 6 is connected to the drive unit, which is a motor. The lower end of the sample inlet funnel 3 is connected to the upper end of the sample delivery tube 2, and the lower end of the sample delivery tube 2 communicates with the interior of the spherical sleeve 10, transporting the sample from the sample inlet funnel 3 to the space between the rotor 6 and the stator in the spherical sleeve 10. The temperature probe 9 extends from the upper part of the spherical sleeve 10 into the oil storage chamber 13 to monitor the sample temperature, and is offset from the rotor 6 and stator to prevent mutual interference. One end of the oil return pipe 2 extends from the upper part of the spherical sleeve 10 into the oil storage chamber 13, and is offset from the rotor 6 and stator to prevent mutual interference. The other end of the oil return pipe 8 is connected to the oil storage tank. After the test, the sample in the oil storage chamber 13 is recovered into the oil storage tank using the oil return pipe 8. The above describes the parts and layout of a conventional Ravenfcld BS / C type high temperature high shear viscosity meter. As an improvement, a protective cover 11 is installed on the upper part of the spherical sleeve 10. The protective cover 11 is divided into a left cover 111 and a right cover 113. The left cover 111 and the right cover 113 are combined to form a complete protective cover 11. The protective cover 11 has an axial clearance perforation 115, which has a stepped hole structure with a smaller upper part and a larger lower part. Preferably, the inner diameter of the larger end of the clearance perforation 115 matches the outer diameter of the spherical sleeve 10, and the smaller end of the clearance perforation 115 surrounds the upper part of the rotor 6, the oil return pipe 8, and the temperature probe 9. In this way, the clearance perforation 115 is mounted on the spherical sleeve 10 via its stepped surface, and its upper diameter is reduced, effectively reducing the risk of dust entering the rotor 6. Simultaneously, it also reduces sample splashing onto the upper surface of the spherical sleeve 10 when the rotor 6 is stirring the sample, improving the cleanliness of the test.

[0035] In a preferred embodiment, combined with Figure 3-6The left cover 111 and the right cover 113 are divided into two equal halves. The left cover 111 and the right cover 113 are connected and fixed by a snap-fit ​​mechanism to prevent them from being accidentally knocked off during use. For example, the snap-fit ​​structure is a shaft hole connection structure, including a first cylinder 112 on each side of the left cover 111 and a second cylinder 114 on each side of the right cover 113 corresponding to the positions of the first cylinder 112. Preferably, when the left cover 111 and the right cover 113 are combined, the first cylinder 112 and the second cylinder 114 are coaxial, and then an L-shaped shaft 12 is used to pass through the first cylinder 112 and the second cylinder 114 to connect the left cover 111 and the right cover 113.

[0036] In some embodiments, combined with Figure 7-8 The left cover 111 and the right cover 113 are connected and positioned by magnetic attraction. Specifically, magnets 14 are installed at the corresponding positions on the left and right covers 111 and 113, respectively. When the left and right covers 111 and 113 approach each other to a certain distance, the magnets 14 attract them together, thereby stabilizing their positions. Preferably, the upper end of the protective cover 11 abuts against the frame body directly above the spherical sleeve 10, and its side is also provided with clearance holes 117 for the oil return pipe 8 and the temperature probe 9.

[0037] In one embodiment of the clearance hole 117, the clearance hole 117 is a transverse hole arranged laterally on the protective cover 11; the clearance hole 117 is not located on the left cover 111 or the right cover 113. In this embodiment, if the clearance hole 117 is only provided on the left cover 111 or the right cover 113, it will result in an excessively large contact gap between the clearance hole 117 and the oil return pipe 8 and the temperature probe 9, increasing the risk of dust ingress.

[0038] In another embodiment of the clearance hole 117, the clearance hole 117 is divided into two parts and respectively provided on the left cover 111 and the right cover 113. The left cover 111 and the right cover 113 are combined to form a complete clearance hole 117. Therefore, the separation line of the protective cover 11 into the left cover 111 and the right cover 113 is determined according to the position of the oil return pipe 8 and the temperature probe 9.

[0039] In the above, the small end of the protective cover 11 extends upward and abuts against the frame 5 directly above or at a certain distance, further improving the protection effect around the rotor 6, while providing clearance holes 117 to avoid interference with the oil return pipe 8 and the temperature probe 9.

[0040] In other embodiments, a cap 4 is also included, which is installed on the upper opening of the sample inlet funnel 3 to close the opening of the sample inlet funnel 3 and prevent dust and moisture from entering the sample inside the sample inlet funnel 3.

[0041] In a preferred embodiment, a portion of the return oil pipe 8 is provided with a sheath 7 to reduce the heat loss during the sample return to the oil storage tank.

[0042] Preferably, the protective cover 11 is made of plexiglass, which not only prevents dust, keeps the heat and reduces moisture, but also allows the stirring process to be observed through the plexiglass.

[0043] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0044] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A high-temperature, high-shear viscometer with a protective cover, comprising a frame, a sample inlet funnel, a sample delivery tube, a spherical sleeve, a drive unit, a temperature probe, a return oil pipe, a stator, and a rotor, wherein, The spherical sleeve is mounted on the worktable of the machine frame and has an oil storage chamber inside. The rotor and stator are installed inside the oil storage chamber, and the upper part of the rotor is connected to the drive device. The lower end of the sample inlet funnel is connected to the upper end of the sample delivery tube, and the lower end of the sample delivery tube is connected to the inside of the spherical sleeve. The temperature probe extends into the oil storage chamber from the upper part of the spherical sleeve. One end of the return oil pipe extends into the oil storage chamber, and the other end is connected to the oil storage tank. The feature is that it also includes a protective cover, which is mounted on the upper part of the spherical sleeve. It consists of a left cover and a right cover, which are combined to form a complete protective cover. The protective cover has an axial clearance perforation, which has a stepped hole structure with a smaller upper part and a larger lower part.

2. The high-temperature, high-shear viscometer with a protective cover as described in claim 1, characterized in that: The inner diameter of the large end of the perforation matches the outer diameter of the spherical sleeve, and the small end surrounds the upper part of the rotor, the oil return pipe and the temperature probe.

3. The high-temperature high-shear viscometer with a protective cover as described in claim 1, characterized in that: The left and right covers are connected and fixed by a snap-fit ​​mechanism.

4. The high-temperature high-shear viscometer with a protective cover as described in claim 3, characterized in that: The snap-fit ​​structure is a shaft hole connection structure, which includes a first cylinder on each side of the left cover, a second cylinder on each side of the right cover corresponding to the position of the first cylinder, and an L-shaped shaft penetrating the first cylinder and the second cylinder.

5. The high-temperature high-shear viscometer with a protective cover as described in claim 4, characterized in that: After the left and right covers are combined, the centers of the first and second cylinders are coaxial.

6. The high-temperature, high-shear viscometer with a protective shield of claim 1, wherein: It also includes a cap, which is installed at the upper opening of the sample inlet funnel.

7. The high-temperature, high-shear viscometer with a protective shield of claim 1, wherein: The return oil pipe is partially fitted with a protective sleeve.

8. The high-temperature, high-shear viscometer with a protective shield of claim 1, wherein: The protective cover is made of plexiglass.

9. The high-temperature, high-shear viscometer with a protective shield of claim 1, wherein: The left and right covers are connected and positioned by magnetic attraction.

10. The high-temperature, high-shear viscometer with a protective shield of claim 1, wherein: The upper end of the protective cover abuts against the frame body directly above the spherical sleeve, and its side is also provided with clearance holes for the oil return pipe and temperature probe.

Images