Device for detecting acceleration motion characteristics of ultrahigh-pressure hydraulic reversing valve core

Abstract

The utility model provides an ultrahigh pressure hydraulic reversing valve core acceleration motion characteristic detection device comprising a valve body which is internally provided with a valve core in clearance fit with the valve body; the magnetic induction iron core is arranged in the gap of the Hall sensor and is used for generating a displacement voltage signal; the non-flexible connector is used for connecting the magnetic induction iron core and the valve element; the A / D converter is used for receiving the displacement voltage signal of the magnetic induction iron core and converting the displacement voltage signal into a digital signal; the DSP processor is used for receiving the digital signal transmitted by the A / D converter and transmitting the digital signal to an upper computer; the HMI is used for receiving the operation information transmitted by the upper computer, displaying and editing the operation information and then transmitting the operation information to the PWM generator; the PWM generator is used for receiving information transmitted by the DSP and driving the electric proportional valve to move, and the technical problems that in an existing detection mode, open-loop control exists, the displacement sensing precision of a valve element is not high, the overshoot situation frequently occurs, meanwhile, the movement speed and acceleration data of the valve element cannot be achieved, and the time domain cannot be accurately calculated are solved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of hydraulic valves, and in particular to a device for detecting acceleration motion characteristics of an ultra-high-pressure hydraulic reversing valve core. Background Art

[0002] The core technology of hydraulic valves is the movement of the valve core, which directly affects the key characteristics of the valve such as flow rate and frequency response. Therefore, it is crucial to detect and analyze the movement characteristics of the valve core. The existing technology drives the movement of the valve core through an electric proportional signal and estimates the movement state of the valve core by detecting the pressure-flow characteristics of the working oil port. This detection method has open-loop control, and the valve core displacement perception accuracy is not high, and overshoot often occurs. At the same time, the valve core movement speed and acceleration data cannot be realized, and the time domain and frequency domain analysis cannot be accurately calculated. In order to solve the above problems, the development of an ultra-high-pressure hydraulic valve core acceleration detection device was carried out. Utility Model Content

[0003] 1. Technical problems to be solved by the utility model:

[0004] The utility model provides a device for detecting the acceleration motion characteristics of an ultra-high-pressure hydraulic reversing valve core, which is used to solve the technical problems existing in the above-mentioned background technology.

[0005] 2. Technical solution:

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] Ultra-high pressure hydraulic reversing valve core acceleration motion characteristics detection device, including

[0008] A valve body, inside of which a valve core is provided to fit the valve body;

[0009] The magnetic induction core is arranged in the gap of the Hall sensor and is used to generate a displacement voltage signal;

[0010] A non-flexible connector for connecting the magnetic core and the valve core;

[0011] A / D converter, used for receiving the displacement voltage signal of the magnetic induction core and converting it into a digital signal;

[0012] DSP processor, used to receive the digital signal transmitted by the A / D converter and transmit it to the host computer;

[0013] HMI human-machine interface, used to receive the calculation information transmitted by the host computer, display and edit the calculation information, and then transmit it to the host computer, DSP processor calculation output to the PWM generator;

[0014] The PWM generator is used to receive the calculation information transmitted by the DSP processor and drive the electric proportional valve to move.

[0015] A further improvement is that the magnetic induction core and the Hall sensor are suspended.

[0016] A further improvement is that a spring cover for sealing the connection between the magnetic induction core and the valve core is provided between the valve body and the Hall sensor.

[0017] A further improvement is that the spring cover is made of stainless steel or alloy steel.

[0018] A further improvement is that the Hall sensor is made of aluminum-nickel-cobalt alloy or nickel-iron alloy material.

[0019] 3.Beneficial effects:

[0020] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0021] 1. This utility model adopts direct contact detection, and the data is more accurate;

[0022] 2. The magnetic core and Hall sensor of this utility model are suspended to eliminate the influence of friction;

[0023] 3. This utility model adopts sealed isolation detection method, which has higher pressure resistance and can withstand hydraulic pressure above 35MPa;

[0024] 4. This utility model adopts differential measurement, which has fast response speed and good linearity;

[0025] 5. The utility model adopts comprehensive comparative analysis by the host computer, which can automatically determine and identify the difference between the output and the standard value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is the principle diagram of the utility model.

[0028] Reference numerals:

[0029] 1-Hall sensor; 2-magnetic induction core; 3-spring cover; 4-non-flexible connector; 5-valve body; 6-valve core. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," "provided with," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] It should be noted that the structures not introduced in the present invention do not involve the design points and improvement directions of the present invention, and all adopt the existing technology. At the same time, the content of the above background technology belongs to the technical cognition scope of the utility model author. Since the technical content in this field is vast and too complicated, the above content of this application does not necessarily constitute the existing technology.

[0033] Reference Figure 1-2 , this embodiment provides an ultra-high pressure hydraulic reversing valve core acceleration motion characteristic detection device, comprising a valve body 6, inside of which is provided a valve core 5 with a clearance fit therewith;

[0034] The magnetic induction core 2 is arranged in the gap of the Hall sensor 1 and is used to generate a displacement voltage signal;

[0035] A non-flexible connector 4 is used to connect the magnetic induction core 2 and the valve core 5;

[0036] An A / D converter, configured to receive the displacement voltage signal of the magnetic induction core 2 and convert it into a digital signal;

[0037] DSP processor, used to receive the digital signal transmitted by the A / D converter and transmit it to the host computer;

[0038] HMI human-machine interface, used to receive the calculation information transmitted by the host computer, display and edit the calculation information, and then transmit it to the host computer, DSP processor calculation output to the PWM generator;

[0039] The PWM generator is used to receive the calculation information transmitted by the DSP processor and drive the electric proportional valve to move. Specifically, the PWM generator drives the magnetic induction core 2 through the Hall sensor 1 to drive the valve core 5 to move.

[0040] In a preferred embodiment, a spring cover 3 for sealing the connection between the magnetic induction core 2 and the valve core 5 is provided between the valve body 6 and the Hall sensor 1. The spring cover 3 is made of pressure-resistant materials such as stainless steel or alloy steel.

[0041] In a preferred embodiment, the Hall sensor 1 is made of a pressure-resistant material such as an Al-Ni-Co alloy or a Ni-Fe alloy.

[0042] Specifically, the valve body 6 and the valve core 5 are clearance-matched, the valve core 5 is connected to the magnetic induction core 2 through the non-flexible connector 4, and the Hall sensor 1, the magnetic induction core 2, the spring cover 3, and the valve body 6 are assembled accordingly.

[0043] Under the working pressure environment, during the reversing operation of the valve core 5, the magnetic induction core 2 moves in the gap of the Hall sensor 1, and a magnetic field change is generated, thereby generating a displacement voltage signal, which is converted into a digital signal by A / D and transmitted to the DSP processor. The host computer calculates the time, displacement, valve core 5 speed, valve core 5 acceleration and other information, and displays and edits it on the HMI human-machine interface, transmits it to the host computer, and the DSP processor calculates and outputs it to the PWM generator to drive the electric proportional valve to move.

[0044] This patent uses differential voltage transformation to detect the movement of the valve core. After A / D conversion, DSP processor, and host computer analysis and calculation, it is compared with the designed movement characteristics to automatically determine, output differences, and adaptively compensate PWM parameters.

[0045] The above-mentioned embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. Ultra-high pressure hydraulic reversing valve core acceleration motion characteristics detection device, characterized in that: include A valve body, inside of which a valve core is provided to fit the valve body; The magnetic induction core is arranged in the gap of the Hall sensor and is used to generate a displacement voltage signal; A non-flexible connector for connecting the magnetic core and the valve core; A / D converter, used for receiving the displacement voltage signal of the magnetic induction core and converting it into a digital signal; DSP processor, used to receive the digital signal transmitted by the A / D converter and transmit it to the host computer; HMI human-machine interface, used to receive the calculation information transmitted by the host computer, display and edit the calculation information, and then transmit it to the host computer, DSP processor calculation output to the PWM generator; The PWM generator is used to receive the calculation information transmitted by the DSP processor and drive the electric proportional valve to move.

2. The device for detecting acceleration motion characteristics of an ultra-high pressure hydraulic reversing valve core according to claim 1, characterized in that: The magnetic induction core and the Hall sensor are suspended.

3. The device for detecting acceleration motion characteristics of an ultra-high pressure hydraulic reversing valve core according to claim 1, characterized in that: A spring cover for sealing is provided between the valve body and the Hall sensor.

4. The device for detecting acceleration motion characteristics of an ultra-high pressure hydraulic reversing valve core according to claim 3, characterized in that: The spring cover is made of stainless steel or alloy steel.

5. The device for detecting acceleration motion characteristics of an ultra-high pressure hydraulic reversing valve core according to claim 1, characterized in that: The Hall sensor is made of aluminum-nickel-cobalt alloy or nickel-iron alloy.

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