High pressure blower and flow meter metering device

Abstract

The utility model relates to the technical field of measurement and detection, especially relates to a high pressure air blower and flowmeter measuring device. High pressure air blower includes casing, driving rotor, driven rotor and driving part. The casing is equipped with the accommodation cavity in, the casing still is equipped with the air inlet and the air outlet with the accommodation cavity intercommunication, the driving rotor and driven rotor all are rotatively connected in the accommodation cavity, the driving rotor and driven rotor are equipped with same number of blade respectively, the blade of driving rotor and the blade of driven rotor all are along the spiral line and set up and spiral direction is opposite, the blade of driving rotor and the blade of driven rotor are interlocked, the driving part is located the outside of casing and is used for driving driving rotor and driven rotor synchronous reverse rotation, the air inlet is located the side of driving rotor and driven rotor away from each other rotation, the air outlet is located the side of driving rotor and driven rotor towards each other rotation. Spiral blade improves the compression efficiency, can satisfy the working condition environment required by flowmeter measuring device detection.

Description

Technical Field

[0001] This utility model relates to the field of measurement and detection technology, and in particular to a high-pressure blower and a flow meter measuring device including the high-pressure blower. Background Technology

[0002] Ultrasonic flow meters are widely used in industrial settings for the precise measurement of flow and pressure within pipelines. When verifying the operation of an ultrasonic flow meter, a blower is typically used to simulate real-world conditions. However, current blowers generate relatively low pressures, failing to meet the environmental requirements for ultrasonic flow meter testing and thus the required testing standards. This results in an inability to accurately assess the performance of the ultrasonic flow meter under actual operating conditions, impacting its reliability and accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a high-pressure blower that can generate sufficient pressure to simulate on-site working conditions.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A high-pressure blower, comprising:

[0006] The housing has an internal cavity and an air inlet and an air outlet that communicate with the cavity.

[0007] The active rotor and the driven rotor are rotatably connected in the receiving cavity. The active rotor and the driven rotor are each provided with the same number of blades. The blades of the active rotor and the blades of the driven rotor are arranged along a helix and the helix directions are opposite. The blades of the active rotor and the blades of the driven rotor mesh with each other.

[0008] The driving component is located outside the housing and is used to drive the active rotor and the driven rotor to rotate synchronously in opposite directions.

[0009] The air inlet is located on the side where the active rotor and the driven rotor rotate away from each other, and the air outlet is located on the side where the active rotor and the driven rotor rotate towards each other.

[0010] Preferably, the driving rotor and the driven rotor are each provided with at least 3 blades.

[0011] Preferably, the blades of the driving rotor extend along a right-handed helix, and the blades of the driven rotor extend along a left-handed helix.

[0012] Preferably, a driving shaft is coaxially fixedly connected to the driving rotor, and a driven shaft is coaxially fixedly connected to the driven rotor, with the driving shaft and the driven shaft arranged in parallel.

[0013] Preferably, the output end of the drive component is coaxially and fixedly connected to the drive shaft via a coupling.

[0014] Preferably, a seal is provided at the through position where the active rotating shaft extends from the housing through the receiving cavity to the outside.

[0015] Preferably, one end of the driving shaft is coaxially fixedly connected to a driving gear, and one end of the driven shaft is coaxially fixedly connected to a driven gear, with the driving gear and the driven gear meshing with each other.

[0016] Preferably, both the driving gear and the driven gear are helical gears.

[0017] Preferably, both the driving shaft and the driven shaft are fitted with bearings and are rotatably connected to the receiving cavity through the bearings.

[0018] This utility model also provides a flow meter measuring device, including the high-pressure blower as described above.

[0019] Compared with the prior art, this utility model has significant progress:

[0020] This invention relates to a high-pressure blower that uses an external drive component to drive an active rotor and a driven rotor to rotate synchronously in opposite directions. Within the receiving cavity, near the air inlet, the blades of the active and driven rotors move away from each other, increasing the cavity volume between the blades near the air inlet to create negative pressure that draws in gas. After entering, the gas is guided by the blades along a spiral path, flowing smoothly along the inner wall of the receiving cavity to the air outlet. Near the air outlet, the blades of the active and driven rotors move closer together, reducing the cavity volume between the blades near the air outlet, compressing the gas into high pressure for stable discharge. The spiral design of the blades and the synchronous counter-rotation of the rotors optimize the gas flow path, reduce energy loss, and improve compression efficiency, thereby generating sufficient gas pressure to meet the operating conditions required for ultrasonic flowmeter metering devices. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 This is a schematic diagram of the overall structure of the high-pressure blower according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the meshing structure of the active rotor and driven rotor of the high-pressure blower according to an embodiment of the present invention;

[0024] Figure 3This is a cross-sectional view of the high-pressure blower along the radial direction of the casing according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1-Housing shell; 11-Receiving cavity; 12-Air inlet; 13-Air outlet; 2-Driven rotor; 21-Driven shaft; 22-Driven gear; 3-Driven rotor; 31-Driven shaft; 32-Driven gear; 4-Blade; 5-Driven component; 6-Coupling; 7-Seal; 8-Bearing; 9-Protective cover; 10-Base. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0027] like Figures 1 to 3 The image shows one embodiment of the high-pressure blower provided by this utility model.

[0028] See Figures 1 to 3 The high-pressure blower in this embodiment includes a housing 1, a driving rotor 2, a driven rotor 3, and a driving component 5.

[0029] The housing 1 contains a cavity 11, and the housing 1 also has an air inlet 12 and an air outlet 13 connected to the cavity 11. The housing 1 serves as the main structure of the entire high-pressure blower, supporting and protecting the internal components. The cavity 11 is located inside the housing 1, and its shape and size allow the driving rotor 2 and driven rotor 3 to rotate along their own axes within it. Furthermore, the driving rotor 2 and driven rotor 3 maintain a suitable clearance from the inner wall of the cavity 11, ensuring gas compression efficiency while preventing interference between the driving rotor 2 and driven rotor 3 and the inner wall of the cavity 11 during rotation. The air inlet 12 is the gas inlet for the blower; its position and shape can be designed according to actual needs to control the gas inflow direction and speed. The air outlet 13 is the outlet for the compressed gas from the blower; its position and shape can be designed according to actual needs to control the gas discharge direction and speed.

[0030] Both the driving rotor 2 and the driven rotor 3 are rotatably connected to the receiving cavity 11. The driving rotor 2 and the driven rotor 3 are each equipped with the same number of blades 4. The blades 4 of both the driving rotor 2 and the driven rotor 3 are arranged along a helix with opposite helical directions, and the blades 4 of the driving rotor 2 and the driven rotor 3 mesh with each other. The shape of the blades 4 directly affects the performance of the high-pressure blower in this embodiment. The helical arrangement of the blades 4 allows them to form a continuous gas flow channel during rotation, effectively guiding the gas flow in the gaps between the blades 4, significantly improving the gas compression efficiency, and ultimately achieving a higher pressure to meet the requirements of high-pressure gas transportation. The parameters of the helix (such as helix angle and pitch) can be optimized according to the design requirements of the blower to achieve the best gas compression effect. In this embodiment, the gas entering the receiving cavity 11 from the air inlet 12 is compressed by the helical blades 4, and the gas pressure discharged from the air outlet 13 can reach 6.4 MPa. Furthermore, the blades 4 on the driving rotor 2 are integrally formed with the driving rotor 2, and the blades 4 on the driven rotor 3 are integrally formed with the driven rotor 3. The design of the blades 4 being integrally formed with the rotor improves the strength and durability of the rotor, reduces wear and damage during operation, thereby increasing the service life of the blower and reducing maintenance costs.

[0031] The drive unit 5 is located outside the housing 1 and is used to drive the active rotor 2 and the driven rotor 3 to rotate synchronously in opposite directions. The air inlet 12 is located on the side of the active rotor 2 and the driven rotor 3 away from each other's rotation, and the air outlet 13 is located on the side of the active rotor 2 and the driven rotor 3 facing each other's rotation. When the active rotor 2 and the driven rotor 3 rotate synchronously in opposite directions, the blades 4 of the active rotor 2 and the blades 4 of the driven rotor 3 move away from each other in the receiving cavity 11 near the air inlet 12, causing the cavity volume between the blades 4 near the air inlet 12 to continuously expand, generating a negative pressure effect, and external gas is drawn in at high speed. After the gas enters the receiving cavity 11 from the air inlet 12, it is guided along the inner wall of the receiving cavity 11 to the side where the air outlet 13 is located under the rotation of the blades 4 of the active rotor 2 and the blades 4 of the driven rotor 3. The helical design of the blades 4 and the synchronous counter-rotation of the rotors enable the gas to flow smoothly along a predetermined path in the receiving cavity 11, reducing eddies and energy loss in the gas flow. In the receiving cavity 11, on the side near the air outlet 13, the blades 4 of the active rotor 2 and the blades 4 of the driven rotor 3 approach each other, causing the cavity volume between the blades 4 near the air outlet 13 to gradually decrease. The gas is compressed to form high pressure, and the high-pressure gas is eventually stably discharged from the air outlet 13.

[0032] Therefore, in this embodiment, the high-pressure blower drives the active rotor 2 and the driven rotor 3 to rotate synchronously in opposite directions via an external drive component 5. In the receiving cavity 11, near the air inlet 12, the blades 4 of the active rotor 2 and the driven rotor 3 move away from each other, increasing the cavity volume between the blades 4 near the air inlet 12 to generate negative pressure and draw in gas. After entering, the gas is guided by the blades 4 along a spiral path and flows smoothly along the inner wall of the receiving cavity 11 to the air outlet 13. Near the air outlet 13, the blades 4 of the active rotor 2 and the driven rotor 3 move closer to each other, reducing the cavity volume between the blades 4 near the air outlet 13, compressing the gas into high pressure, and then stably discharging it. The spiral design of the blades 4 and the synchronous counter-rotation of the rotors optimize the gas flow path, reduce energy loss, and improve compression efficiency, thereby generating sufficient gas pressure to meet the operating conditions required for the ultrasonic flowmeter metering device.

[0033] See Figure 2 and Figure 3 Preferably, the driving rotor 2 and the driven rotor 3 are each provided with at least three blades 4. The blades 4 extend along a helical line and are integrally formed with the rotor body, forming a rigid and continuous meshing tooth profile. The number of blades 4 on each rotor is at least three, so that there is always a pair of blades 4 meshing within the 360° rotation range of the driving rotor 2 and the driven rotor 3, thereby ensuring the meshing continuity between the driving rotor 2 and the driven rotor 3. The continuously meshing blades 4 form a continuous sealing band, suppressing the backflow of gas to the air inlet 12 and improving the compression efficiency. Furthermore, the driving rotor 2 and the driven rotor 3 generate at least three volume change cycles per revolution, increasing the gas throughput per unit time, thus improving the compression efficiency. The fact that there are at least three blades 4 on each rotor also reduces the load on a single blade 4 during rotation, which is beneficial for maintaining a stable airflow compression process. In this embodiment, both the driving rotor 2 and the driven rotor 3 are provided with three blades 4, which can meet the functional requirements of the high-pressure blower in this embodiment without making the structure too complex, and is easy to manufacture and maintain.

[0034] See Figure 1 and Figure 2 Preferably, the blades 4 of the driving rotor 2 extend along a right-handed helix, and the blades 4 of the driven rotor 3 extend along a left-handed helix, forming a mirror-symmetrical rigid meshing tooth profile between the blades 4 of the driving rotor 2 and the driven rotor 3. Thus, the blades 4 between the driving rotor 2 and the driven rotor 3 form a continuous sealing band when meshing, ensuring that gas is pushed unidirectionally from the inlet 12 to the outlet 13, preventing backflow. Simultaneously, the balanced force on the blades 4 during meshing makes the rotor run more smoothly, reducing vibration and noise caused by uneven force. Furthermore, the balanced force also reduces localized excessive wear on the blades 4, thereby extending the service life of the blades 4 and improving the reliability of the high-pressure blower in this embodiment.

[0035] See Figure 1 Preferably, a driving shaft 21 is coaxially fixedly connected to the driving rotor 2, and a driven shaft 31 is coaxially fixedly connected to the driven rotor 3. The driving shaft 21 and the driven shaft 31 are arranged in parallel. The driving rotor 2 and the driving shaft 21, and the driven rotor 3 and the driven shaft 31, can be fixedly connected by a key connection, a shrink sleeve connection, or integral molding, thereby preventing relative movement between the rotor and the shaft. The parallel arrangement of the driving shaft 21 and the driven shaft 31 ensures a constant center distance between the driving rotor 2 and the driven rotor 3, preventing uneven loading of the blades 4 during meshing. Both the driving shaft 21 and the driven shaft 31 are rotatably connected to the receiving cavity 11 of the housing 1. Driving the driving shaft 21 and the driven shaft 31 to rotate drives the driving rotor 2 and the driven rotor 3 to rotate. During operation, the driving shaft 21 receives external power and then transmits the power to the driven shaft 31 through a power transmission structure, thereby causing the driving rotor 2 and the driven rotor 3 to rotate synchronously. Synchronous rotation ensures stable blade meshing between rotors, avoids meshing problems caused by speed differences, reduces vibration and noise during operation, and improves the overall operational stability of the high-pressure blower in this embodiment.

[0036] See Figure 1 Preferably, the output end of the drive component 5 is coaxially and fixedly connected to the drive shaft 21 via a coupling 6. The coupling 6 reliably transmits the rotation and torque of the output end of the drive component 5 to the drive shaft 21, thereby ensuring synchronous rotation between the output end of the drive component 5 and the drive shaft 21. By providing the coupling 6, vibration and impact during power transmission between the output end of the drive component 5 and the drive shaft 21 can be reduced, thereby improving the operational stability of the high-pressure blower in this embodiment. In this embodiment, a protective cover 9 is also provided on the outside of the coupling 6. The protective cover 9 not only protects the coupling 6 from the influence of the external environment but also prevents operators from contacting high-speed rotating components, ensuring operational safety.

[0037] See Figure 1Preferably, one end of the driving shaft 21 is coaxially fixedly connected to a driving gear 22, and one end of the driven shaft 31 is coaxially fixedly connected to a driven gear 32, with the driving gear 22 and driven gear 32 meshing with each other. The meshing of the driving gear 22 and driven gear 32 ensures the synchronous reverse rotation of the driving shaft 21 and driven shaft 31. When the driving shaft 21 receives power and rotates through the driving member 5, the driving gear 22 drives the driven gear 32 to rotate in the opposite direction, thereby realizing the reverse rotation of the driven shaft 31 relative to the driving shaft 21. Gear transmission can provide a precise transmission ratio, ensuring a constant speed ratio between the driving rotor 2 and the driven rotor 3, and maintaining a stable meshing relationship. In this embodiment, both the driving gear 22 and the driven gear 32 are helical gears. The meshing of helical gears is smoother than that of spur gears, which can effectively reduce vibration and noise, and improve the operating stability and efficiency of the high-pressure blower in this embodiment.

[0038] See Figure 1 Preferably, both the driving shaft 21 and the driven shaft 31 are fitted with bearings 8 and rotatably connected to the receiving cavity 11 via the bearings 8. The inner ring of the bearing 8 fitted on the driving shaft 21 is fixedly connected to the driving shaft 21, the inner ring of the bearing 8 fitted on the driven shaft 31 is fixedly connected to the driving shaft 31, and the outer ring of the bearing 8 is fixedly connected to the inner wall of the receiving cavity 11. This replaces the rotation between the driving shaft 21, the driven shaft 31, and the inner wall of the receiving cavity 11 with the rotation between the inner and outer rings of the bearing 8, thereby reducing friction between the shafts and the inner wall of the receiving cavity 11 and reducing energy loss. In this embodiment, a bearing 8 is fitted at each end of the driving shaft 21 and the driven shaft 31. The ends of the driving shaft 21 and the driven shaft 31 are supported by the bearings 8, which can effectively reduce the radial and axial vibrations of the driving shaft 21 and the driven shaft 31 and ensure the stable rotation of the driving shaft 21 and the driven shaft 31 in the receiving cavity 11.

[0039] See Figure 1 Preferably, a sealing element 7 is provided at the through position where the drive shaft 21 extends from the housing 1 through the receiving cavity 11 to the outside. The sealing element 7 is installed in the gap between the drive shaft 21 and the housing 1, and the sealing element 7 is elastically or mechanically fixedly connected between the outer wall surface of the drive shaft 21 and the inner wall surface of the housing 1 to form an effective seal. The sealing element 7 can effectively prevent gas in the receiving cavity 11 from leaking through the gap between the drive shaft 21 and the housing 1, ensuring the sealing performance of the receiving cavity 11. The good sealing performance of the receiving cavity 11 can ensure the compression efficiency when the blades 4 between the drive rotor 2 and the driven rotor 3 compress gas. During the gas compression process, the sealing element 7 prevents gas leakage in the receiving cavity 11, thereby maintaining the pressure in the receiving cavity 11 and ensuring the compression efficiency.

[0040] The high-pressure blower in this embodiment also includes a base 10, on which the housing 1 and the drive component 5 are both mounted. The base 10 serves as the fundamental support structure for the entire high-pressure blower, providing a stable mounting platform for the housing 1 and the drive component 5. This ensures that the housing 1 and the drive component 5 maintain a relatively stable positional relationship during operation, preventing displacement or shaking caused by vibration or external forces, thereby guaranteeing the overall operational stability of the high-pressure blower. Simultaneously, the base 10 can also disperse and absorb some of the vibration energy generated by the drive component 5 and rotor movement, reducing the transmission of these vibrations to the outside world, thus reducing the noise generated during the operation of the high-pressure blower and its impact on surrounding equipment. Furthermore, integrating the housing 1 and the drive component 5 onto the base 10 facilitates the handling, installation, and maintenance of the entire high-pressure blower, improving the adaptability and convenience of the entire device in different usage scenarios.

[0041] The working process of the high-pressure blower in this embodiment to achieve gas compression is as follows:

[0042] Inhalation phase

[0043] The drive unit 5 transmits the torque from its output end to the drive shaft 21 via the coupling 6. The rotation of the drive shaft 21 also drives the drive gear 22 to rotate. The drive gear 22 meshes with the driven gear 32, causing the drive rotor 2 and the driven rotor 3 to rotate synchronously in opposite directions. The blades 4 of the drive rotor 2 and the driven rotor 3 on the side closest to the air inlet 12 move away from each other, and the volume of the chamber between the blades 4 near the air inlet 12 rapidly expands, forming a negative pressure, and external air is drawn in at high speed.

[0044] transport stage

[0045] After the gas enters, the blades 4 of the active rotor 2 and the blades 4 of the driven rotor 3 smoothly push the gas towards the outlet 13. During the rotation of the active rotor 2 and the driven rotor 3, at least one pair of blades 4 are always engaged to form a continuous sealing zone to prevent gas backflow.

[0046] Compression stage

[0047] When the gas reaches the area near the air outlet 13, the blades 4 of the active rotor 2 and the driven rotor 3 on the side near the air outlet 13 move closer to each other, the volume of the chamber between the blades 4 near the air outlet 13 gradually decreases, the gas is compressed, and the active rotor 2 and the driven rotor 3 generate 3 volume change cycles for each revolution.

[0048] Excretion stage

[0049] The high-pressure gas, compressed to 6.4 MPa, is finally discharged continuously and stably from the air outlet 13.

[0050] Based on the high-pressure blower of this utility model, this utility model embodiment also provides a flow meter metering device, which includes the high-pressure blower described above in this embodiment.

[0051] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A high-pressure blower, characterized in that, include: The housing (1) has a cavity (11) inside, and the housing (1) is also provided with an air inlet (12) and an air outlet (13) communicating with the cavity (11); The active rotor (2) and the driven rotor (3) are rotatably connected in the receiving cavity (11). The active rotor (2) and the driven rotor (3) are respectively provided with the same number of blades (4). The blades (4) of the active rotor (2) and the blades (4) of the driven rotor (3) are arranged along a helix and the helix directions are opposite. The blades (4) of the active rotor (2) and the blades (4) of the driven rotor (3) mesh with each other. A driving element (5) is disposed outside the housing (1) and is used to drive the active rotor (2) and the driven rotor (3) to rotate synchronously in opposite directions; The air inlet (12) is located on the side of the active rotor (2) and the driven rotor (3) away from each other's rotation, and the air outlet (13) is located on the side of the active rotor (2) and the driven rotor (3) facing each other's rotation.

2. The high-pressure blower according to claim 1, characterized in that, The driving rotor (2) and the driven rotor (3) are each provided with at least 3 blades (4).

3. The high-pressure blower according to claim 1, characterized in that, The blades (4) of the active rotor (2) extend along a right-handed helix, and the blades (4) of the driven rotor (3) extend along a left-handed helix.

4. The high-pressure blower according to claim 1, characterized in that, An active rotating shaft (21) is coaxially fixedly connected to the active rotor (2), and a driven rotating shaft (31) is coaxially fixedly connected to the driven rotor (3). The active rotating shaft (21) and the driven rotating shaft (31) are arranged in parallel.

5. The high-pressure blower according to claim 4, characterized in that, The output end of the drive unit (5) is coaxially and fixedly connected to the drive shaft (21) via a coupling (6).

6. The high-pressure blower according to claim 5, characterized in that, The active rotating shaft (21) has a sealing element (7) at the through position from the receiving cavity (11) through the housing (1) to the outside.

7. The high-pressure blower according to claim 4, characterized in that, One end of the driving shaft (21) is coaxially fixedly connected to a driving gear (22), and one end of the driven shaft (31) is coaxially fixedly connected to a driven gear (32). The driving gear (22) and the driven gear (32) mesh with each other.

8. The high-pressure blower according to claim 7, characterized in that, Both the driving gear (22) and the driven gear (32) are helical gears.

9. The high-pressure blower according to claim 4, characterized in that, Both the active rotating shaft (21) and the driven rotating shaft (31) are fitted with bearings (8) and are rotatably connected to the receiving cavity (11) through the bearings (8).

10. A flow meter measuring device, characterized in that, Includes the high-pressure blower as described in any one of claims 1 to 9.

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