Adjustable gear pump

Abstract

The utility model relates to the technical field of fluid machinery, in particular to an adjustable gear pump, which comprises a gear pump main body, a variable frequency motor, a flow sensor, pressure sensors, a temperature sensor, a microprogrammed control unit (MCU) and a digital display module, a temperature sensor is arranged on the outer side of a gear meshing area, and multi-dimensional state sensing is achieved; the manual adjustment limitation of a traditional gear pump is broken through, precise self-adaptive flow control is achieved, local and remote dual-mode interaction is supported, and the requirements of intelligent and unmanned industrial scenes are met.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, specifically to an adjustable gear pump. Background Technology

[0002] Traditional gear pumps have the following problems:

[0003] Flow rate is not visible: It relies on external instruments or manual adjustment and cannot display key parameters such as flow rate and pressure in real time.

[0004] Adjustment lag: Although existing technologies such as CN202310123X propose variable frequency speed control schemes, they lack dynamic compensation mechanisms and do not integrate condition monitoring functions.

[0005] Inconvenient maintenance: Problems such as seal failure and wear are difficult to detect in a timely manner, requiring machine shutdown for repair, which affects production efficiency. Utility Model Content

[0006] The purpose of this utility model is to solve the above-mentioned technical problems by providing an adjustable gear pump, characterized in that it includes: a gear pump body, a variable frequency motor, a flow sensor, a pressure sensor, a temperature sensor, an MCU control unit, and a digital display module.

[0007] Gear pump body: Composed of a housing, driving gear, driven gear, and axial end cover; Variable frequency motor: Coaxially connected to the driving gear via a coupling, installed at the input end of the gear pump body; Flow sensor: A non-invasive electromagnetic sensor embedded in the inner wall of the outlet pipe of the gear pump body, 10-15cm away from the outlet flange face; Pressure sensors: Includes a first pressure sensor and a second pressure sensor, respectively located on the outlet and inlet pipes of the gear pump body; Temperature sensor: Installed on the outside of the gear meshing area of ​​the gear pump body housing, fixed by threads and spaced 2-3mm from the inner wall of the gear cavity; MCU control unit: Integrated in the shockproof control box on the top of the gear pump body, connected to the sensors via shielded cables; Digital display module: Embedded on the outer surface of the gear pump body housing, located directly in front of the operator's line of sight, including an LCD touch screen and status indicator lights.

[0008] As a preferred embodiment of this utility model, the digital display module supports touch operation and wireless communication, and displays flow rate, pressure, temperature and fault codes in real time.

[0009] As a preferred technical solution of this utility model, the addition of a sealing status monitoring sensor is used to detect leakage by cooperating with the liquid level gauge and the sealing ring.

[0010] As a preferred technical solution of this utility model, the touch screen of the digital display module is equipped with a 3-second long press activation mechanism, and the emergency stop button requires physical lifting of the cover.

[0011] As a preferred technical solution of this utility model, the MCU control unit reserves a CAN bus interface to support access to an industrial Internet of Things platform.

[0012] As a preferred technical solution of this utility model, the MCU control unit integrates a PID algorithm to dynamically adjust the speed of the variable frequency motor based on sensor feedback.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. High-precision closed-loop control: Flow rate regulation error < ±2%, real-time pressure / temperature monitoring, achieving industrial-grade precise delivery;

[0015] 2. Intelligent dynamic compensation: Adapts to changes in pipeline resistance and automatically maintains constant flow output without manual intervention;

[0016] 3. Multi-dimensional fault early warning: Integrates multiple parameter data such as flow rate, pressure, temperature, and sealing, and provides second-level abnormal alarm and self-diagnosis. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Reference numerals: 1. Gear pump body; 2. Variable frequency motor; 3. Flow sensor; 4. Pressure sensor; 5. Temperature sensor; 6. MCU control unit; 7. Digital display module; 101. Housing; 102. Drive gear; 103. Driven gear; 104. Axial end cover; 401. First pressure sensor; 402. Second pressure sensor. Detailed Implementation Example 1

[0020] The gear pump body is connected to the main oil circuit of the hydraulic station via a flange, and the variable frequency motor power supply is connected to industrial three-phase power. The flow sensor is installed on the straight section of the outlet pipeline, and the pressure sensor is connected to the pressure measurement interface of the outlet and inlet respectively. The digital display module is fixed on the control cabinet panel of the hydraulic station and connected to the factory SCADA system via an RJ45 interface. The target flow rate is set to 120 L / min, the upper limit of pressure is 20 MPa, and the over-temperature threshold is 85℃ via the touch screen.

[0021] After one month of operation, the temperature sensor detected that the temperature in the gear meshing area was consistently higher than 80°C. The MCU, combined with vibration data analysis, indicated "insufficient bearing lubrication." After maintenance personnel added grease, the temperature returned to normal. Historical data showed that the average fault response time was reduced from 2 hours in the original system to 15 minutes.

[0022] like Figure 1 As shown, this utility model proposes: an adjustable gear pump, comprising: a gear pump body, a variable frequency motor, a flow sensor, a pressure sensor, a temperature sensor, an MCU control unit, and a digital display module;

[0023] Gear pump body: Composed of a housing, driving gear, driven gear, and axial end cover; Variable frequency motor: Coaxially connected to the driving gear via a coupling, installed at the input end of the gear pump body; Flow sensor: A non-invasive electromagnetic sensor embedded in the inner wall of the outlet pipe of the gear pump body, 10-15cm away from the outlet flange face; Pressure sensors: Includes a first pressure sensor and a second pressure sensor, respectively located on the outlet and inlet pipes of the gear pump body; Temperature sensor: Installed on the outside of the gear meshing area of ​​the gear pump body housing, fixed by threads and spaced 2-3mm from the inner wall of the gear cavity; MCU control unit: Integrated in the shockproof control box on the top of the gear pump body, connected to the sensors via shielded cables; Digital display module: Embedded on the outer surface of the gear pump body housing, located directly in front of the operator's line of sight, including an LCD touch screen and status indicator lights.

[0024] Working principle:

[0025] Upon power-on, the MCU control unit self-checks whether the sensor signals are normal, and the digital display module shows the initialization interface; target flow rate, pressure threshold, and temperature alarm value can be set via touch screen or mobile APP.

[0026] The variable frequency motor drives the drive gear to rotate, and the gear pump begins to deliver fluid.

[0027] Sensors collect data in real time:

[0028] Flow sensor: detects outlet flow rate;

[0029] Pressure sensor: Monitors the pressure difference between the inlet and outlet;

[0030] Temperature sensor: Reads the temperature in the gear meshing area;

[0031] The intelligent gear pump supports manual adjustment of the motor speed and offers two flexible operating modes:

[0032] 1. Users set the target flow rate value via the touch screen, and the MCU control unit automatically calculates the required speed based on the PID algorithm to drive the variable frequency motor to achieve the target flow rate;

[0033] 2. When the motor speed value is directly input on the touch screen, the MCU control unit pauses the PID closed-loop control, the variable frequency motor runs at the set speed, and the screen displays the real-time flow and pressure simultaneously;

[0034] Exception handling:

[0035] Minor anomalies (such as temperature exceeding limits): The digital display module flashes an alarm icon, and the MCU controls the motor to reduce its speed.

[0036] Serious malfunction (such as seal failure): Immediately cut off the motor power, push a stop command to the APP, and record the fault code;

[0037] The breakthroughs in precision, reliability, and intelligence of this gear pump make it suitable for the upgrading needs of hydraulic machinery, petrochemicals, marine power and other fields, and it has significant market competitiveness.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable gear pump, characterized in that: The system includes a gear pump body (1), a variable frequency motor (2), a flow sensor (3), a pressure sensor (4), a temperature sensor (5), an MCU control unit (6), and a digital display module (7); the gear pump body (1) consists of a housing (101), a drive gear (102), a driven gear (103), and an axial end cover (104); the variable frequency motor (2) is coaxially connected to the drive gear (102) via a coupling and is installed at the input end of the gear pump body (1); the flow sensor (3) is a non-invasive electromagnetic sensor embedded in the inner wall of the outlet pipe of the gear pump body (1), 10-15 cm away from the outlet flange; the pressure sensor... Sensor (4): including a first pressure sensor (401) and a second pressure sensor (402), respectively arranged on the outlet and inlet pipes of the gear pump body (1); Temperature sensor (5): installed on the outside of the gear meshing area of ​​the gear body (1) housing (101), fixed by threads and spaced 2-3mm from the inner wall of the gear cavity; MCU control unit (6): integrated in the shockproof control box on the top of the gear pump body (1), and connected to the sensor through a shielded cable; Digital display module (7): embedded on the outer surface of the housing (101) of the gear pump body (1), located directly in front of the operator's line of sight, including an LCD touch screen and status indicator lights.

2. The adjustable gear pump according to claim 1, characterized in that: The digital display module (7) supports touch operation and wireless communication, and displays flow rate, pressure, temperature and fault codes in real time.

3. An adjustable gear pump according to claim 1, characterized in that: A sealing condition monitoring sensor is added to detect leakage by working with a level gauge and a sealing ring.

4. An adjustable gear pump according to claim 1, characterized in that: The touch screen of the digital display module (7) is equipped with a 3-second long press activation mechanism, and the emergency stop button requires physical lifting of the cover.

5. An adjustable gear pump according to claim 1, characterized in that: The MCU control unit (6) integrates a PID algorithm to dynamically adjust the speed of the variable frequency motor (2) based on sensor feedback.

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