Oil tank liquid level monitoring assembly for hydraulic pump source device

Abstract

The utility model discloses an oil tank liquid level monitoring assembly for a hydraulic pump source device. The oil tank liquid level monitoring assembly comprises a hydraulic pump shell, an oil tank shell, a piston assembly, a spring and a monitoring unit. The monitoring unit comprises a hydraulic guide rod, a vertically connected measuring rod, a displacement sensor and a cable; the hydraulic guide rod is conical and horizontally arranged in the hydraulic pump shell, and the tail end of the hydraulic guide rod is connected with the piston assembly. The conical hydraulic guide rod located in the hydraulic pump shell and the measuring rod perpendicular to the hydraulic guide rod are arranged, liquid level changes drive the hydraulic guide rod to move, the measuring rod is driven to move in the radial direction, and the current of the displacement sensor changes to obtain the liquid level change condition; the stroke of the measuring rod is greatly reduced, so that the size and the weight of the displacement sensor can be correspondingly reduced; the hydraulic pump source device has the advantage that the size and weight of the hydraulic pump source device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil level hydraulic monitoring, in particular to an oil tank liquid level monitoring component for a hydraulic pump source device. Background Art

[0002] The hydraulic pump source device for aviation is mainly composed of motors, hydraulic pumps, booster tanks and other components. It mainly converts the electrical energy on the aircraft into hydraulic energy. On the one hand, it is used in small hydraulic subsystems to complete specific actions such as aircraft weapon ejection and landing gear retraction and extension; on the other hand, it is used as an emergency hydraulic energy source to provide energy when the main hydraulic system fails so that the relevant actuators can complete the specified actions to ensure the safety of the aircraft. In order to determine whether the hydraulic pump source device can work normally, the oil level in the booster tank needs to be monitored.

[0003] However, the commonly used boost tank liquid level monitoring mechanism is to set a connecting rod on the tank piston, and the connecting rod is connected to the measuring rod of the linear displacement sensor. When the oil or spring pushes the piston to move, the connecting rod is driven to move, causing the measuring rod of the linear displacement sensor to extend and retract, thereby causing the current of the linear displacement sensor to change. After being converted into an electrical signal through a related circuit, it is fed back to the on-board control system, thereby monitoring the liquid level changes in the tank.

[0004] Therefore, the stroke of the linear displacement sensor's measuring rod determines the range of the tank level monitoring. For a larger boost tank, the stroke of the piston is larger, resulting in a larger volume and weight of the linear displacement sensor, which is not suitable for the development needs of small and light aircraft hydraulic pump source devices. Utility Model Content

[0005] The purpose of the utility model is to provide an oil tank liquid level monitoring component for a hydraulic pump source device. The utility model has the advantage of being able to reduce the volume and weight of the hydraulic pump source device.

[0006] The technical solution of the utility model is as follows: a tank level monitoring component for a hydraulic pump source device, comprising a hydraulic pump housing, a tank shell, a piston assembly, a spring and a monitoring unit; the monitoring unit comprises a hydraulic guide rod, a measuring rod vertically connected to the hydraulic guide rod, a displacement sensor arranged on the measuring rod and a cable connected to the displacement sensor; the hydraulic guide rod is conical and horizontally arranged in the hydraulic pump housing, and a blind hole corresponding to the hydraulic guide rod is opened on the hydraulic pump housing; the end of the hydraulic guide rod is connected to the piston assembly; the hydraulic guide rod is connected to the piston assembly through a thread; the tank shell is connected to the hydraulic pump housing through a screw.

[0007] In the aforementioned oil tank level monitoring assembly for the hydraulic pump source device, the hydraulic guide rod is connected to the piston assembly via a thread; and the oil tank housing is connected to the hydraulic pump housing via a screw.

[0008] In the aforementioned oil tank level monitoring assembly for the hydraulic pump source device, an installation cavity for installing a measuring rod is provided on the hydraulic pump housing, and a displacement sensor is arranged at the top of the installation cavity; the measuring rod is vertically arranged in the installation cavity, a sealing ring is provided at the lower end of the measuring rod and fits with the installation cavity, and a return spring connected to the bottom of the displacement sensor is provided on the measuring rod.

[0009] Compared with the prior art, the present application provides a conical hydraulic guide rod located in the hydraulic pump housing, and provides a measuring rod perpendicular to the hydraulic guide rod. When the liquid level changes, the hydraulic guide rod will be driven to move in the hydraulic pump housing. The movement of the conical hydraulic guide rod will drive the vertical measuring rod to move in the radial direction. The displacement sensor current changes to obtain the liquid level change.

[0010] By providing a tapered hydraulic guide rod and a measuring rod perpendicular to the hydraulic guide rod, the stroke of the measuring rod is greatly reduced, thereby correspondingly reducing the volume and weight of the displacement sensor, and also reducing the volume and weight of the hydraulic pump source device.

[0011] Therefore, the present application has the advantage of being able to reduce the volume and weight of the hydraulic pump source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0014] The markings in the accompanying drawings are: 1-hydraulic pump housing, 2-hydraulic guide rod, 3-measuring rod, 4-cable, 5-displacement sensor, 6-oil tank housing, 7-piston assembly, 8-spring, 10-sealing ring, 11-return spring. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0016] Embodiment. A tank level monitoring component for a hydraulic pump source device, such as Figure 1 and 2 As shown, it includes a hydraulic pump housing 1, an oil tank housing 6, a piston assembly 7, a spring 8 and a monitoring unit; the monitoring unit includes a hydraulic guide rod 2, a measuring rod 3 vertically connected to the hydraulic guide rod 2, a displacement sensor 5 arranged on the measuring rod 3 and a cable 4 connected to the displacement sensor; the hydraulic guide rod 2 is conical and horizontally arranged in the hydraulic pump housing 1, and a blind hole corresponding to the hydraulic guide rod 2 is opened on the hydraulic pump housing 1; the end of the hydraulic guide rod 2 is connected to the piston assembly 7.

[0017] The cable 4 is connected to the control system, and the displacement sensor 5 sends the displacement change to the control system through the cable 4 .

[0018] The hydraulic guide rod 2 is connected to the piston assembly 7 via threads; the oil tank housing 6 is connected to the hydraulic pump housing 1 via screws.

[0019] The hydraulic pump housing 1 is provided with an installation cavity for installing the measuring rod 3, and the displacement sensor 5 is arranged at the top of the installation cavity; the measuring rod 3 is vertically arranged in the installation cavity, and the lower end of the measuring rod 3 is provided with a sealing ring 10 that fits with the installation cavity, and the measuring rod 3 is sleeved with a return spring 11 connected to the bottom of the displacement sensor 5.

[0020] Working principle:

[0021] In the initial state, the piston assembly 7 is at the bottom of the oil tank under the action of the spring 8, and the hydraulic guide rod 2 is fully extended into the hydraulic pump housing 1. At this time, the measuring rod 3 is compressed and is at the minimum extension position, that is, the oil level in the oil tank is the minimum at this time;

[0022] When oil is injected into the oil tank A chamber of the hydraulic pump source device, the piston assembly 7 is pushed to compress the spring 8 under the action of the oil pressure until the spring 8 reaches the maximum compression position, the hydraulic guide rod 2 moves horizontally and extends, and the measuring rod 3 extends downward to the maximum extension position under the action of the return spring 11, that is, the oil level in the oil tank is the maximum at this time;

[0023] By calibrating and shaping the current curves at the maximum and minimum displacements of the measuring rod 3 and transmitting the signal to the flight control system via the cable 4, the change of the fuel tank liquid level can be measured in real time.

Claims

1. A tank level monitoring assembly for a hydraulic pump source device, characterized in that: The invention comprises a hydraulic pump housing (1), an oil tank housing (6), a piston assembly (7), a spring (8) and a monitoring unit; the monitoring unit comprises a hydraulic guide rod (2), a measuring rod (3) vertically connected to the hydraulic guide rod (2), a displacement sensor (5) arranged on the measuring rod (3) and a cable (4) connected to the displacement sensor; the hydraulic guide rod (2) is conical and horizontally arranged in the hydraulic pump housing (1); a blind hole corresponding to the hydraulic guide rod (2) is opened on the hydraulic pump housing (1); the end of the hydraulic guide rod (2) is connected to the piston assembly (7); the cable (4) is connected to a control system, and the displacement sensor (5) sends the displacement change to the control system through the cable (4).

2. The oil tank level monitoring assembly for a hydraulic pump source device according to claim 1, characterized in that: The hydraulic guide rod (2) is connected to the piston assembly (7) via a thread; and the oil tank housing (6) is connected to the hydraulic pump housing (1) via a screw.

3. The oil tank level monitoring assembly for a hydraulic pump source device according to claim 1, characterized in that: The hydraulic pump housing (1) is provided with a mounting cavity for mounting a measuring rod (3), and the displacement sensor (5) is arranged at the top of the mounting cavity; the measuring rod (3) is vertically arranged in the mounting cavity, the lower end of the measuring rod (3) is provided with a sealing ring (10) that fits the mounting cavity, and the measuring rod (3) is sleeved with a return spring (11) that is connected to the bottom of the displacement sensor (5).

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