High-pressure gear flowmeter

Abstract

The utility model discloses a high-pressure gear flowmeter which comprises a base and a cover plate, the cover plate covers the base, a cavity is arranged in the base, two gears meshed with each other are arranged in the cavity, a through hole is formed in the center of each gear, a fixing shaft penetrates through the through holes, and a circular ring is fixed on the inner wall of each through hole. The annular protrusion on the inner wall of the circular ring is in running fit with the annular groove in the fixing shaft through a smooth ball. A copper damping disc is fixed to the end face of the gear, and oppositely-arranged permanent magnets are installed in the base and the cover plate. Through the design of a gear through hole, a circular ring and a ball, the weight is reduced, the rotation resistance is reduced, and fluid with large viscous resistance can be accurately measured; the copper damping disc is matched with the permanent magnet, braking resistance is generated through electromagnetic induction, inertial rotation of the gear is prevented, and measurement errors are reduced; the meshing positions of the liquid inlet, the liquid outlet and the gear are on the same horizontal line, fluid flowing is smooth, and measurement is accurate and reliable. The high-pressure gear flowmeter is reasonable in structural design, high in measuring precision and suitable for measuring viscous fluid.

Description

Technical Field

[0001] This utility model relates to the field of flow meters, and particularly to high-pressure gear flow meters. Background Technology

[0002] In gear flow meters, cylindrical gear flow meters are mainly used to accurately measure the volumetric flow rate of fluid media. However, existing gear flow meters struggle to accurately measure the flow rate of fluids with high viscous resistance because the heavy weight and high rotational resistance of the gears make it difficult for the fluid to drive them to rotate. Furthermore, when fluid injection stops, the gears continue to rotate due to inertia, causing the recorded number of rotations to exceed the actual number, resulting in significant measurement errors.

[0003] Therefore, it is necessary to propose a high-pressure gear flow meter to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure gear flow meter to solve the problems of fluids with high viscous resistance making it difficult to drive the gears to rotate and the large measurement data errors caused by the inertial rotation of the gears.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-pressure gear flow meter includes a base and a cover plate, with the cover plate fitting over the base. The base has an internal chamber containing two fixed shafts. The upper and lower ends of the fixed shafts are fixedly connected to the base and the cover plate, respectively. Two gears are installed within the chamber, meshing with each other. A through hole is located at the center of each gear. The fixed shaft passes through the through hole along the gear axis. A ring is fixedly installed on the inner wall of the through hole, its inner wall tightly fitting the fixed shaft. An annular protrusion is provided on the inner wall of the ring, and an annular groove is provided on the fixed shaft. The annular protrusion and groove are adapted to each other. The ring rotates with the fixed shaft through the annular protrusion and groove. Smooth balls are positioned between the annular protrusion and the groove.

[0007] Preferably, a copper damping disc is fixedly installed on the end face of the gear, and permanent magnets are fixedly installed inside the base and the cover plate, with the N pole and S pole of the two permanent magnets arranged opposite each other.

[0008] Preferably, an electromagnetic coil is mounted on the permanent magnet, and the electromagnetic coil is electrically connected to the external controller of the flow meter.

[0009] Preferably, sealing rings are fixedly installed at both the upper and lower ends of the gear, the end face of the sealing ring extends into the through hole and fits tightly against the ring, and the inner wall of the sealing ring fits tightly against the fixed shaft.

[0010] Preferably, the base has a liquid inlet on the front side and a liquid inlet / outlet on the rear side, the liquid inlet and liquid inlet facing each other, and the liquid inlet and liquid inlet and the meshing points of the two gears are located on the same horizontal line.

[0011] Preferably, the left and right sides of the cavity are configured as smooth arc surfaces adapted to the gear.

[0012] Preferably, the base is provided with an assembly hole, and the cover plate is fitted onto the base by a bottom fixing pin and the assembly hole.

[0013] Preferably, a sealing gasket is provided at the connection between the fixed shaft and the base and the cover plate. The sealing gasket is fixedly installed on the fixed shaft, and the fixed shaft is interference-fitted with the base and the cover plate.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. The gear has a perforation inside, which reduces the weight of the gear and makes it easier for the fluid to drive its rotation; the perforation has a ring with annular protrusion inside, and the fixed shaft has an annular groove. The ring rotates on the fixed shaft by utilizing the annular protrusion, and smooth balls are set between the annular protrusion and the annular groove, which further reduces the resistance of the gear rotating on the fixed shaft, so that the flow meter can accurately measure fluids with high viscous resistance.

[0016] 2. A copper damping disc is fixedly installed on the end face of the gear. Permanent magnets are installed inside the base and cover plate. When the fluid injection stops, the electromagnetic coil on the permanent magnet is energized through the external controller. The copper damping disc cuts the magnetic field lines to generate eddy currents. The eddy currents interact with the magnetic field to generate an Ampere force in the opposite direction to the rotation of the damping disc, forming a braking resistance, stopping the gear rotation in time, and reducing measurement errors caused by inertia.

[0017] 3. The liquid inlet on the front side and the liquid outlet on the rear side of the base are arranged opposite each other and are on the same horizontal line as the meshing point of the two gears. This layout allows the fluid to directly drive the gears to rotate after entering, and is then transported to the outlet through the gap at the gear meshing point. This ensures a smooth fluid flow path, reduces flow resistance and energy loss, and allows the fluid to drive the gears to rotate evenly and stably. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the high-pressure gear flow meter base of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall external structure of the high-pressure gear flow meter of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the gear of this utility model.

[0021] Figure 4 This is a schematic diagram of the fixed shaft annular groove and smooth ball bearing structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the permanent magnet structure of this utility model.

[0023] In the diagram: 1. Base; 2. Cover plate; 3. Chamber; 4. Fixed shaft; 5. Gear; 6. Perforation; 7. Ring; 8. Annular protrusion; 9. Ring groove; 10. Smooth ball bearing; 11. Copper damping disc; 12. Permanent magnet; 13. Sealing ring; 14. Liquid inlet; 15. Liquid outlet; 16. Assembly hole. Detailed Implementation

[0024] 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.

[0025] This utility model provides, for example Figures 1-5 The high-pressure gear flow meter shown includes a base 1 and a cover plate 2. The cover plate 2 covers the base 1. The base 1 has a chamber 3 inside. Two fixed shafts 4 are arranged in the chamber 3. The upper and lower ends of the fixed shafts 4 are fixedly connected to the base 1 and the cover plate 2, respectively. Two gears 5 are arranged in the chamber 3. The two gears 5 mesh with each other. A through hole 6 is arranged in the center of the gear 5. The fixed shaft 4 passes through the through hole 6 along the axis of the gear 5. A ring 7 is fixedly installed on the inner wall of the through hole 6. The inner wall of the ring 7 is tightly fitted with the fixed shaft 4. An annular protrusion 8 is arranged on the inner wall of the ring 7. An annular groove 9 is arranged on the fixed shaft 4. The annular protrusion 8 and the annular groove 9 are adapted to each other. The ring 7 rotates with the fixed shaft 4 through the annular protrusion 8 and the annular groove 9. Smooth balls 10 are arranged between the annular protrusion 8 and the annular groove 9.

[0026] Furthermore, a copper damping disc 11 is fixedly installed on the end face of gear 5, and permanent magnets 12 are fixedly installed inside the base 1 and the cover plate 2, with the N pole and S pole of the two permanent magnets 12 arranged opposite to each other.

[0027] A copper damping disc 11 is fixedly mounted on the end face of gear 5. Simultaneously, permanent magnets 12 are installed inside both the base 1 and the cover plate 2, with their N and S poles positioned opposite each other, thus creating a magnetic field in a specific direction between them. When fluid stops flowing into the flow meter, gear 5 continues to rotate due to inertia, and the copper damping disc 11 moves accordingly within the magnetic field. At this time, the surface of the copper damping disc 11 cuts magnetic field lines, generating closed eddy currents (circular currents) within the disc according to the principle of electromagnetic induction. The interaction between these eddy currents and the magnetic field produces an Ampere force, the direction of which is opposite to the rotation direction of the damping disc 11, thus creating braking resistance. This forces gear 5 to stop rotating promptly, effectively reducing measurement errors caused by inertia and improving the flow meter's measurement accuracy.

[0028] Furthermore, an electromagnetic coil is installed on the permanent magnet 12, and the electromagnetic coil is electrically connected to the external controller of the flow meter;

[0029] Furthermore, sealing rings 13 are fixedly installed at both the upper and lower ends of gear 5. The end face of sealing ring 13 extends into the inside of through hole 6 and fits tightly with ring 7. The inner wall of sealing ring 13 fits tightly with fixed shaft 4.

[0030] Furthermore, a liquid inlet 14 is provided on the front side of the base 1, and a liquid inlet 15 is provided on the rear side of the base 1. The liquid inlet 14 and the liquid inlet 15 are arranged opposite to each other, and the liquid inlet 14, the liquid inlet 15 and the meshing points of the two gears 5 are located on the same horizontal line.

[0031] The base 1 has an inlet 14 on the front and an outlet 15 on the rear. These two ports are opposite each other. The inlet 14, outlet 15, and the meshing points of the two meshing gears 5 are on the same horizontal line. This arrangement allows the fluid entering through the inlet 14 to directly drive the gears 5 to rotate under pressure. The fluid is then transported through the gap at the meshing points of the gears 5 to the outlet 15 for discharge. Because the inlet, outlet, and gear meshing points are on the same horizontal line, the fluid flow path is ensured to be smooth, reducing flow resistance and energy loss. This allows the fluid to drive the gears to rotate more evenly and stably, thereby ensuring the accuracy and reliability of the flow meter measurement.

[0032] Furthermore, the left and right sides inside chamber 3 are set as smooth arc surfaces that are compatible with gear 5;

[0033] Furthermore, the base 1 is provided with an assembly hole 16, and the cover plate 2 is fitted onto the base 1 by a bottom fixing pin and the assembly hole 16.

[0034] Furthermore, sealing gaskets are provided at the connection points between the fixed shaft 4 and the base 1 and the cover plate 2. The sealing gaskets are fixedly installed on the fixed shaft 4, and the fixed shaft 4 is interference-fitted with the base 1 and the cover plate 2.

[0035] Sealing gaskets are installed at the connections between the fixed shaft 4 and the base 1 and cover plate 2, and these gaskets are fixedly installed on the fixed shaft 4. The fixed shaft 4 is connected to the base 1 and cover plate 2 using an interference fit. This design allows the sealing gaskets to fill the tiny gaps at the connections between the fixed shaft 4 and the base 1 and cover plate 2, while the interference fit ensures a tight fit between the fixed shaft 4 and the base 1 and cover plate 2. This mutual cooperation effectively prevents fluid leakage from the connections, ensuring the airtightness of the chamber 3. This allows the high-pressure gear flow meter to operate normally under high pressure, avoiding any impact on measurement accuracy and equipment safety due to leakage.

[0036] In the embodiments of this utility model, when the gear flow meter measures fluids with high viscous resistance, the fluid has difficulty driving the gear 5 to rotate. By setting a perforation 6 inside the gear 5, the weight of the gear 5 is further reduced, making it easier for the fluid to drive the gear 5 to rotate. By setting a ring 7 with an annular protrusion 8 inside the perforation 6, and an annular groove 9 on the fixed shaft 4, the ring 7 rotates on the fixed shaft 4 using the annular protrusion 8. Smooth balls 10 are set between the annular protrusion 8 and the annular groove 9, the resistance is further reduced, thereby reducing the resistance of the gear 5 rotating on the fixed shaft 4. This achieves the effect of the flow meter being able to accurately measure fluids with high viscous resistance.

[0037] To address the issue that when fluid stops flowing into the flowmeter, the gear 5 continues to rotate on the fixed shaft 4 due to inertia, resulting in a higher reading of the number of rotations than the actual number and causing measurement errors, a copper damping disk 11 is installed on the gear 5. Simultaneously with the cessation of fluid flow into the flowmeter, an external controller energizes the electromagnetic coil on the permanent magnet 12, generating magnetic field lines between the permanent magnets 12. Under the rotation of the gear 5, the surface of the copper damping disk 11 cuts these magnetic field lines. According to the law of electromagnetic induction, closed eddy currents (circular currents) are generated within the disk. These eddy currents interact with the magnetic field to produce an Ampere force, the direction of which is opposite to the rotation direction of the damping disk 11, thus creating braking resistance. This allows for timely stopping of the gear 5's rotation, improving measurement accuracy.

[0038] The working principle of this utility model is as follows: The fluid enters from the inlet on the front side of the base 1. Since the inlet 14, outlet 15 and the meshing point of the two gears 5 are on the same straight line, the fluid pushes the two meshing gears 5 to rotate. When the gears 5 rotate, the rotational resistance is reduced by the ring 7, annular protrusion 8, annular groove 9 and smooth ball 10 on the fixed shaft 4. When the fluid stops being injected, the copper damping disc 11 on the end face of the gear 5, together with the permanent magnet 12 and electromagnetic coil arranged opposite to each other in the base 1 and cover plate 2, generates braking resistance to prevent the gears 5 from continuing to rotate due to inertia. The fluid is discharged from the outlet 15 on the rear side through the gap at the meshing point of the gears 5. The flow rate is measured by the number of rotations of the gears 5. At the same time, the sealing gasket and interference fit between the fixed shaft 4 and the base 1 and cover plate 2 ensure the sealing of the chamber.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-pressure gear flow meter, comprising a base (1) and a cover plate (2), the cover plate (2) covering the base (1), the base (1) having a chamber (3) inside, the chamber (3) having two fixed shafts (4) inside, the upper and lower ends of the fixed shafts (4) being fixedly connected to the base (1) and the cover plate (2) respectively, characterized in that: Two gears (5) are provided in the chamber (3), and the two gears (5) mesh with each other. A through hole (6) is provided in the center of the gear (5). The fixed shaft (4) passes through the through hole (6) along the axis of the gear (5). A ring (7) is fixedly installed on the inner wall of the through hole (6). The inner wall of the ring (7) is tightly fitted with the fixed shaft (4). An annular protrusion (8) is provided on the inner wall of the ring (7). An annular groove (9) is provided on the fixed shaft (4). The annular protrusion (8) and the annular groove (9) are adapted to each other. The ring (7) rotates with the fixed shaft (4) through the annular protrusion (8) and the annular groove (9). A smooth ball (10) is provided between the annular protrusion (8) and the annular groove (9).

2. The high-pressure gear flow meter according to claim 1, characterized in that: A copper damping disc (11) is fixedly installed on the end face of the gear (5). Permanent magnets (12) are fixedly installed inside the base (1) and the cover plate (2), and the N poles and S poles of the two permanent magnets (12) are arranged opposite to each other.

3. The high-pressure gear flow meter according to claim 2, characterized in that: An electromagnetic coil is installed on the permanent magnet (12), and the electromagnetic coil is electrically connected to the external controller of the flow meter.

4. The high-pressure gear flow meter according to claim 1, characterized in that: The gear (5) is fixedly installed with sealing rings (13) at both the upper and lower ends. The end face of the sealing ring (13) extends into the through hole (6) and fits tightly with the ring (7). The inner wall of the sealing ring (13) fits tightly with the fixed shaft (4).

5. The high-pressure gear flow meter according to claim 1, characterized in that: The base (1) has a liquid inlet (14) on the front side and a liquid outlet (15) on the rear side. The liquid inlet (14) and the liquid outlet (15) are arranged opposite to each other, and the liquid inlet (14), the liquid outlet (15) and the meshing points of the two gears (5) are located on the same horizontal line.

6. The high-pressure gear flow meter according to claim 1, characterized in that: The left and right sides of the interior of the chamber (3) are set as smooth arc surfaces that are adapted to the gear (5).

7. The high-pressure gear flow meter according to claim 1, characterized in that: The base (1) is provided with an assembly hole (16), and the cover plate (2) is covered on the base (1) by a bottom fixing pin and the assembly hole (16).

8. The high-pressure gear flow meter according to claim 1, characterized in that: Sealing gaskets are provided at the connection points between the fixed shaft (4) and the base (1) and the cover plate (2). The sealing gaskets are fixedly installed on the fixed shaft (4). The fixed shaft (4) is interference-fitted with the base (1) and the cover plate (2).

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