A kind of blade angle measurement and signal transmission device for shaft through-flow pump

Abstract

This invention discloses a blade angle measurement and signal transmission device for a vertical shaft axial flow pump. The device may include: a displacement feedback mechanism, one end of which is hinged to the other end of an operating rod; a sliding displacement sensor, the displacement signal input end of which is connected to the displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism; and a voltage signal acquisition device, electrically connected to the displacement signal output end. This invention uses a displacement sensor to convert the displacement signal of the displacement feedback mechanism into an electrical signal, which is then acquired and transmitted by the voltage signal acquisition device. This allows the device to perform real-time measurement, automatic reading, and data uploading during pump operation. Furthermore, the device maintains the required accuracy for blade angle measurement during rotation, ensuring that the detected blade angle signal is not distorted or interrupted, thus fulfilling the need for real-time blade angle monitoring.

Description

Technical Field

[0001] This invention relates to the field of pump-related equipment, and more specifically, to a device for measuring and transmitting the blade angle on a vertical shaft axial flow pump. Background Technology

[0002] In large axial flow pump units, vertical axial flow pumps (where the motor and pump are directly connected) and shaft axial flow pump units generally use mechanical manual adjustment devices to adjust the pump blade angle. Vertical axial flow pump units have ample installation space and a fixed location for the blade adjustment mechanism and blade angle signal acquisition device, which can be wired to a host computer to transmit the blade angle signal in real time. In shaft axial flow pump units, the blade adjustment mechanism is located at the connection between the pump main shaft and the low-speed shaft of the gearbox. Since the adjustment mechanism rotates with the main shaft during operation, it's impossible to install a wired angle measuring device at the end of the main shaft. Therefore, the blade angle signal can only be read from the indicator mechanism (instrument panel) on the adjustment device when the pump is stationary.

[0003] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a blade angle measurement and signal transmission device for vertical shaft axial flow pumps, enabling real-time measurement, automatic reading, and data uploading of blade angles even while the pump is in operation.

[0005] To achieve the above objectives, this invention proposes a blade angle measurement and signal transmission device for a vertical shaft axial flow pump. The transmission device includes a housing, an operating rod located within the housing, and an adjustment mechanism for driving the operating rod axially. One end of the operating rod is connected to the end of the main shaft of the vertical shaft axial flow pump. The housing is connected to the low-speed end of a gearbox via a coupling. The device also includes:

[0006] A displacement feedback mechanism, one end of which is hinged to the other end of an operating lever;

[0007] A sliding mechanism is installed inside the housing, and the other end of the displacement feedback mechanism is connected to the sliding mechanism;

[0008] A pointer lever, which is connected to an operating lever and moves synchronously with the operating lever in the axial direction;

[0009] A displacement sensor, comprising at least one displacement signal input terminal and one displacement signal output terminal, wherein the displacement signal input terminal is connected to a displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism;

[0010] A voltage signal acquisition device, wherein the voltage signal acquisition device is connected to the displacement signal output terminal;

[0011] A power supply that provides operating voltage for the displacement sensor and voltage signal acquisition unit;

[0012] The voltage signal acquisition device and the power supply are both mounted on the housing.

[0013] Optionally, the sliding mechanism is a slide rail, one end of the pointer rod is slidably connected to the slide rail, and the displacement signal input terminal is connected to the pointer rod.

[0014] Optionally, the displacement feedback mechanism further includes a support plate and a connecting rod. One end of the support plate is hinged to the operating rod, and the other end is connected to one end of the connecting rod. The other end of the connecting rod is connected to the other end of the pointer rod.

[0015] Optionally, an observation cover for observing the position of the pointer rod is provided on the housing and corresponding to the slide rail.

[0016] Optionally, the displacement sensor is installed inside the housing, the voltage signal acquisition unit and the power supply are installed on the outside of the housing, and the housing is provided with a wire hole.

[0017] Optionally, the power source is a storage battery, which is mounted on the housing via a battery box.

[0018] Optionally, the adjusting mechanism includes a worm gear, a worm, a worm gear housing, a bearing housing, and roller bearings. The worm gear housing and the bearing housing are installed inside the housing. The worm gear is located inside the worm gear housing. The worm meshes with the worm gear. There are two roller bearings, which are respectively sleeved on both ends of the worm gear. One roller bearing is installed inside the worm gear housing, and the other roller bearing is installed inside the bearing housing.

[0019] Optionally, the operating lever includes a connecting part connected to the main shaft of the vertical shaft axial flow pump, a driving part located at the center of the worm gear, and a connecting part hinged to the displacement feedback mechanism, wherein the driving part is threadedly connected to the worm gear through a trapezoidal thread pair.

[0020] Optionally, the observation cover is made of glass.

[0021] Optionally, the worm gear seat and the bearing seat are connected by bolts and then installed inside the housing.

[0022] The beneficial effects of this invention are as follows: This invention can convert the displacement signal of the displacement feedback mechanism into an electrical signal through a displacement sensor, and then transmit it wirelessly after being acquired by a voltage signal acquisition device. This allows the device to transmit detection signals in real time during the operation of the water pump. When in use, the housing of this device rotates together with the output shaft of the water pump. Since the displacement sensor and voltage signal acquisition device are mounted on the housing, they can rotate together with the housing. This allows the device to measure, automatically read, and upload data of the blade angle in real time while the water pump is working. Furthermore, the device meets the measurement accuracy requirements for the blade angle during rotation, and the detected blade angle signal will not be distorted or interrupted, thus fulfilling the need for real-time monitoring of the blade angle.

[0023] The apparatus of the present invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0024] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0025] Figure 1 A cross-sectional schematic diagram of a blade angle measurement and signal transmission device for a vertical shaft axial flow pump according to an embodiment of the present invention is shown.

[0026] In the diagram: 1-House, 2-Operating lever, 3-Displacement sensor, 4-Voltage signal acquisition unit, 5-Battery box, 6-Slide rail, 7-Pointer lever, 8-Support plate, 9-Connecting rod, 10-Observation cover, 11-Wire hole, 12-Worm gear, 13-Worm, 14-Worm gear seat, 15-Bearing seat, 16-Roller bearing. Detailed Implementation

[0027] The invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0028] According to the present invention, a blade angle measuring and signal transmission device for a vertical shaft axial flow pump includes a housing, an operating rod located within the housing, and an adjusting mechanism for driving the operating rod axially. One end of the operating rod is connected to the end of the main shaft of the vertical shaft axial flow pump, and the housing is connected to the low-speed end of a gearbox via a coupling. The device is characterized by further comprising:

[0029] A displacement feedback mechanism, one end of which is hinged to the other end of the operating lever;

[0030] A sliding mechanism is installed inside the housing, and the other end of the displacement feedback mechanism is connected to the sliding mechanism;

[0031] The pointer lever is connected to the operating lever and moves synchronously with the operating lever in the axial direction.

[0032] A displacement sensor includes at least one displacement signal input terminal and one displacement signal output terminal. The displacement signal input terminal is connected to a displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism.

[0033] A voltage signal acquisition device is connected to the displacement signal output terminal.

[0034] The power supply provides operating voltage for the displacement sensor and voltage signal acquisition unit.

[0035] The voltage signal acquisition unit and power supply are both mounted on the housing.

[0036] The displacement sensor and voltage signal acquisition unit are powered by a power supply. The displacement sensor detects the displacement of the operating lever fed back by the displacement feedback mechanism and transmits the detected signal to the voltage signal acquisition unit. The voltage signal acquisition unit then transmits the detected signal wirelessly to an external receiving device. This allows the device to perform real-time measurement, automatic reading, and data uploading of the water pump's blade angle while the pump is operating. Example

[0037] Please see Figure 1A device for measuring and transmitting the blade angle of a vertical shaft axial flow pump is disclosed. The device includes a housing 1, an operating lever 2 located within the housing 1, and an adjustment mechanism for driving the axial movement of the operating lever 2. One end of the operating lever 2 is connected to the end of the main shaft of the vertical shaft axial flow pump. The housing 1 is connected to the low-speed end of a gearbox via a coupling. A special tool drives the worm gear 12 and worm 13 to rotate. The forward and backward movement of the operating lever 2 is achieved through the rotation of the trapezoidal thread pair between the worm gear 12 and the operating lever 2, thereby driving the linkage mechanism in the external rotating wheel assembly to realize the rotation of the pump blades around a pivot, thus achieving the purpose of adjusting the pump blade angle in the positive and negative directions. The worm gear 12 and worm 13 are self-locking, and the trapezoidal thread pair is self-locking, ensuring the stability of the device. The device also includes:

[0038] A displacement feedback mechanism, one end of which is hinged to the other end of the operating lever 2;

[0039] A sliding mechanism is installed inside the housing 1, and the other end of the displacement feedback mechanism is connected to the sliding mechanism;

[0040] The pointer rod 7 is connected to the operating rod 2 and moves synchronously with the operating rod 2 in the axial direction.

[0041] The displacement sensor 3 includes at least one displacement signal input terminal and one displacement signal output terminal. The displacement signal input terminal is connected to the displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism.

[0042] Voltage signal acquisition device 4, which is connected to the displacement signal output terminal;

[0043] The power supply provides operating voltage for the displacement sensor 3 and the voltage signal acquisition unit 4.

[0044] The voltage signal acquisition device 4 and the power supply are both mounted on the housing.

[0045] Specifically, the sliding mechanism is a slide rail 6, one end of the pointer rod 7 is slidably connected to the slide rail 6, and the displacement signal input end is connected to the pointer rod 7.

[0046] Specifically, the displacement feedback mechanism also includes a support plate 8 and a connecting rod 9. One end of the support plate 8 is hinged to the operating rod 2, and the other end is connected to one end of the connecting rod 9. The other end of the connecting rod 9 is connected to the other end of the pointer rod 7. The operating rod 2 can drive the pointer rod 7 to move axially through the support plate 8. A displacement sensor 3 is installed on the left side of the pointer rod 7. The displacement of the pointer rod 7 is measured by the displacement sensor 3, and the displacement signal is linearly related to the blade angle signal. Taking the water pump blade angle adjustment range of -4° to +4° as an example, that is, the blade angle adjustment range is 8°, then the displacement of the pointer rod 7 is 40mm, and the movement range meets the installation requirements of the displacement sensor 3. The measuring end of the displacement sensor 3 uses conductive resistive material sprayed on the PCB to achieve precise control and adjustment measurement. The sliding brush is installed on the slide rail 6 and is tightly combined with the conductive resistive material, resulting in high measurement accuracy and long service life. At the same time, the sensor probe is a silicon nitride ceramic ball with good wear resistance, and is equipped with a sliding brush with spring damping and an independent buffer device, which can ensure reliable contact with the resistive element even during high-speed operation or impact and vibration. The displacement sensor 3 outputs a 0~5V electrical signal, which is received by the voltage signal acquisition instrument and transmitted wirelessly.

[0047] Specifically, an observation cover 10 is provided on the housing 1 and at the corresponding slide rail 6 for observing the position of the pointer rod 7. The observation cover 10 allows the user to observe the inside of the device when the water pump stops working and to calibrate the data of the voltage signal acquisition unit.

[0048] Specifically, the displacement sensor 3 is installed inside the housing 1, the voltage signal acquisition device 4 and the power supply are installed on the outside of the housing 1. The housing 1 is provided with a wire hole 11, through which the wires are connected, thereby installing the displacement sensor 3 inside the housing 1 and installing the voltage signal acquisition device 4 outside the housing 1.

[0049] Specifically, the power source is a storage battery, which is installed on the housing 1 via a battery box 5, which protects the storage battery.

[0050] Specifically, the adjusting mechanism includes a worm gear 12, a worm 13, a worm gear seat 14, a bearing seat 15, and roller bearings 16. The worm gear seat 14 and the bearing seat 15 are installed inside the housing 1. The worm gear 12 is located inside the worm gear seat 14. The worm 13 meshes with the worm gear 12. There are two roller bearings 16. The two roller bearings 16 are respectively sleeved on both ends of the worm gear 12. One roller bearing 16 is installed inside the worm gear seat 14, and the other roller bearing 16 is installed inside the bearing seat 15.

[0051] Specifically, the operating lever 2 includes a connecting part that is connected to the main shaft of the vertical shaft axial flow pump, a driving part located at the center of the worm gear 12, and a connecting part that is hinged to the displacement feedback mechanism, wherein the driving part is threadedly connected to the worm gear 12 through a trapezoidal thread pair.

[0052] Specifically, the observation cover 10 is made of glass, which enhances light transmission and makes it easier for users to observe.

[0053] Specifically, the worm gear seat 14 and the bearing seat 15 are connected by bolts and installed inside the housing 1.

[0054] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A device for measuring and transmitting the blade angle on a vertical shaft axial flow pump, the transmission device comprising a housing, an operating lever located within the housing, and an adjustment mechanism for driving the operating lever to move axially, one end of the operating lever being connected to the end of the main shaft of the vertical shaft axial flow pump, and the housing being connected to the low-speed end of a gearbox via a coupling, characterized in that... Also comprising: a displacement feedback mechanism, one end of which is hingedly connected to the other end of the operating rod; a sliding mechanism, which is installed in the housing, and the other end of the displacement feedback mechanism is connected to the sliding mechanism; a pointer rod, which is connected to the operating rod and moves synchronously with the operating rod in the axial direction; a displacement sensor, which comprises at least one displacement signal input end and one displacement signal output end, and the displacement signal input end is connected to the displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism; a voltage signal collector, which is connected to the displacement signal output end; a power supply, which provides working voltage for the displacement sensor and the voltage signal collector; wherein the voltage signal collector and the power supply are both installed on the housing; the sliding mechanism is a sliding rail, one end of the pointer rod is slidingly connected to the sliding rail, and the displacement signal input end is connected to the pointer rod; the displacement feedback mechanism further comprises a support plate and a connecting rod, one end of the support plate is hingedly connected to the operating rod, the other end of the support plate is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the other end of the pointer rod; an observation cover is provided on the housing corresponding to the sliding rail for observing the position of the pointer rod.

2. The blade angle measurement and signal transmission device for the shaft through-flow pump according to claim 1, characterized in that, The displacement sensor is installed inside the housing, the voltage signal collector and the power supply are installed outside the housing, and a wire hole is provided on the housing.

3. The blade angle measurement and signal transmission device for use in a shaft through-flow pump according to claim 2, characterized in that The power supply is a battery, which is installed on the housing through a battery box.

4. The blade angle measurement and signal transmission device for use in a shaft through-flow pump according to claim 1, characterized in that, The adjusting mechanism comprises a worm gear, a worm, a worm gear seat, a bearing seat and a roller bearing, the worm gear seat and the bearing seat are installed in the housing, the worm is engaged with the worm gear, the number of roller bearings is 2, two roller bearings are respectively sleeved on both ends of the worm gear, one of the roller bearings is installed in the worm gear seat, and the other roller bearing is installed in the bearing seat.

5. The blade angle measurement and signal transmission device for use in a shaft through-flow pump according to claim 4, characterized in that The operating rod comprises a connecting portion connected to the main shaft of the shaft pump, a driving portion located at the center of the worm gear, and a connecting portion hingedly connected to the displacement feedback mechanism, wherein the driving portion is threadedly connected to the worm gear through a trapezoidal thread pair.

6. The blade angle measurement and signal transmission device for use in a shaft-penetration pump according to claim 1, characterized in that, The observation cover is made of glass.

7. The blade angle measurement and signal transmission device for use in a shaft-penetration pump according to claim 4, characterized in that, The worm gear seat and the bearing seat are connected by bolts and then installed in the housing.

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