阅读说明：本技术 一种基于示功图的往复式压缩机反向角检测系统 (A kind of reciprocating compressor reflex angle detection system based on indicator card ) 是由 彭灼华 秦杰 户佐金 王有富 卢荣富 于 2019-07-30 设计创作，主要内容包括：本发明公开了一种基于示功图的往复式压缩机反向角检测系统,具体涉及压缩机检测技术领域,包括主控单元、存储单元和显示单元；所述主控单元的输入端设有压力获取单元和输入单元,所述存储单元连接有数据计算单元,所述数据计算单元还与主控单元和显示单元连接；所述压力获取单元具体为多个压力传感器,多个所述压力传感器设置于往复式压缩机的内部,包括连杆压力传感器和十字头销压力传感器,用于检测压缩机综合活塞力<I>Fp</I>,所述数据计算单元用于将压力获取单元获取的数据进行计算。本发明相较于传统的缸壁开孔获取气缸内动态压力的方式,操作简单,且数据的准确性高,便于推广示功图法在往复式压缩机故障诊断领域中的应用。(The reciprocating compressor reflex angle detection system based on indicator card that the invention discloses a kind of, and in particular to compressor detection technique field, including main control unit, storage unit and display unit；The input terminal of the main control unit is equipped with pressure acquiring unit and input unit, and the storage unit is connected with Data Computation Unit, and the Data Computation Unit is also connect with main control unit and display unit；The pressure acquiring unit is specially multiple pressure sensors, and multiple pressure sensors are set to the inside of reciprocating compressor, including connecting rod pressure sensor and crosshead pin pressure sensor, for detecting compressor multiple piston load Fp , the Data Computation Unit is for calculating the data that pressure acquiring unit obtains.The present invention obtains the mode of dynamic pressure in cylinder compared to traditional casing wall aperture, easy to operate, and the accuracy of data is high, convenient for promoting application of the indicator diagram method in reciprocating compressor fault diagnosis field.)

1. a kind of reciprocating compressor reflex angle detection system based on indicator card, which is characterized in that including main control unit (1), Storage unit (2) and display unit (3)；

The input terminal of the main control unit (1) is equipped with pressure acquiring unit (5) and input unit (4), and the storage unit (2) is even It is connected to Data Computation Unit (6), the Data Computation Unit (6) also connect with main control unit (1) and display unit (3)；

The pressure acquiring unit (5) is specially multiple pressure sensors, and multiple pressure sensors are set to reciprocating pressure The inside of contracting machine, including connecting rod pressure sensor and crosshead pin pressure sensor, for detecting compressor multiple piston load Fp, The Data Computation Unit (6) draws the data after calculating for calculating the data that pressure acquiring unit (5) obtain For indicator card and carry out indicator card input；

The Data Computation Unit (6) carries out graphic searching using indicator card of the BFS algorithm to acquisition, from the root node of indicator card Start, along the node of the width traversing graph of indicator card, when node is accessed, Stop node traversal；

The input unit (4) is used for the performance parameter of the detected reciprocating compressor of input system, and the storage unit (2) is used It is stored in the data and result generated in calculating process to system, the storage unit (2) is specially plug type tf Card, the display unit (3) treated for showing Data Computation Unit (6) data and compressor deflection are relevant all kinds of Data；

The main control unit (1) is used to provide operation in the process of running for system and the performance of data processing is supported.

2. a kind of reciprocating compressor reflex angle detection system based on indicator card according to claim 1, feature exist It include compressor internal gas power Fg in: the performance parameter of the input unit (4) input, piston inertia power I, piston reciprocating rubs Wipe power Fr and compressor crank pin radius r.

3. a kind of reciprocating compressor reflex angle detection system based on indicator card according to claim 1, feature exist In: the Data Computation Unit (6) specifically comprises the following steps: the processing of indicator card

Root node is put into the coordinate system of indicator card by step 1 first；

Step 2 takes out first node from indicator card coordinate system, and examines whether it is target, if finding target, Terminate to search and returns result；

Step 3 does not such as look for target, its all indicator card numerical value that do not examined is added in the coordinate system of indicator card；

Step 4, if queue is sky, i.e., the target not searched in figure terminates to search.

4. a kind of reciprocating compressor reflex angle detection system using described in claim 1-3 any one based on indicator card Detection method, which is characterized in that specifically comprise the following steps:

Step 1, starting reciprocating compressor works, when compressor crank shaft is in any rotation angle, pressure acquiring unit (5) it works, the value of connecting rod pressure sensor and the detection of crosshead pin pressure sensor in compressor accumulates superposition, obtains compression Machine multiple piston load Fp；

Step 2, compressor multiple piston load Fp can be acted on first on crosshead pin, and be transmitted along connecting rod, and connecting rod is moving type State, main control unit (1) set the flexible movable angle of connecting rod and cylinder-bore axis as α, and the numerical value that pressure acquiring unit (5) are obtained is defeated Enter to Data Computation Unit (6), Data Computation Unit (6) calculates connecting rod stress Fc:

Step 3, when connecting rod and axis are at angle α, main control unit (1) setting crosshead presses to the pressure of crosshead slideway N calculates crosshead slideway pressure N using Data Computation Unit (6):

N=Fptg α；

Step 4, therefore, compressor operation when, act on crosshead pin compressor multiple piston load Fp can by connecting rod by Power Fc and crosshead slideway pressure N calculates connecting rod stress Fc and crosshead slideway pressure N difference percentage, obtains compressor work The size of the deflection A of work, specifically:

The data generated in deflection A and deflection A calculating process are stored in storage unit (2) by step 5, main control unit (1) It is interior, and Data Computation Unit (6) extracts the performance parameter of input unit (4) input, i.e. compressor internal gas power Fg, piston is used to Property power I, piston reciprocating frictional force Fr and compressor crank pin radius r, utilize above-mentioned data and reflex angle A numeric renderings compressor The indicator card of reflex angle, and indicator card output is shown on display unit (3).

5. a kind of detection side of reciprocating compressor reflex angle detection system based on indicator card according to claim 4 Method, which is characterized in that during carrying out compressor operation, the frictional force of reciprocating member and piston motion on the contrary, its Size specifically:

Wherein, Ni is column power, and m is mechanical efficiency.

6. a kind of detection side of reciprocating compressor reflex angle detection system based on indicator card according to claim 4 Method, which is characterized in that the normal value size of the deflection A is 15 ° of 30 ° of < A <.

Technical field

The present invention relates to compressor detection technique fields, it is more particularly related to a kind of based on the past of indicator card Twin compressor reflex angle detection system.

Background technique

Reciprocating-piston compressor possesses the performance parameter covering the most extensively praised, volume flow Suck and exhaust pressure and shaft power etc. Parameter is the most wide in range.Therefore it is widely used in defeated, oil and gas processing outside the gas collection of industrial gas oil, note Chu Qianqi, gaslift row Hydromining gas, gas-lift production, gas injection and crude oil stabilization etc..

Reciprocating compressor find in use lining of connecting rod small end there are when scaling loss the problem of, according to analyze this directly and The insufficient lubrication of lining of connecting rod small end is related.There are many reason of leading to lining of connecting rod small end insufficient lubrication, such as stopping up of oil channel, oil pressure Low, piston rod load cannot be waited reversely, and wherein piston rod reversal of load problem is the most important of influence lining of connecting rod small end lubrication Reason.

Piston rod reversal of load have to continue -- the fixed time, with allow lubricating oil well into and play a role.This A time is turned with crankshaft " angle indicates referred to as " reflex angle.In reciprocating compressor on-line monitoring and diagnosis system, generally use The mode of direct aperture obtains the dynamic pressure in cylinder on cylinder casing wall.But since this mode for measuring dynamic pressure is real Border operation is relatively difficult, and casing wall aperture also brings greater risk to cylinder intensity, thus constrains indicator diagram method in reciprocating pressure Extensive use in contracting machine fault diagnosis field.

Summary of the invention

In order to overcome the drawbacks described above of the prior art, the embodiment of the present invention provides a kind of reciprocating pressure based on indicator card Pressure sensor is arranged inside reciprocating compressor, monitors by the way that pressure acquiring unit is arranged for contracting machine reflex angle detection system Real-time pressure data in compressor operation obtains compressor multiple piston load, and the basic property of itself and compressor is joined Number is mixed and is calculated, and obtains compressor its variation of internal every pressure during the work time during the work time, simultaneously Using the pressure change inside compressor, the size of the reversed angle value of compressor is obtained, is obtained compared to traditional casing wall aperture The mode of dynamic pressure, easy to operate in cylinder, and the accuracy of data is high, convenient for promoting indicator diagram method in reciprocating compressor Application in fault diagnosis field.

To achieve the above object, the invention provides the following technical scheme: a kind of reciprocating compressor based on indicator card is anti- To angle detection system, including main control unit, storage unit and display unit；

The input terminal of the main control unit is equipped with pressure acquiring unit and input unit, and the storage unit is connected with data Computing unit, the Data Computation Unit are also connect with main control unit and display unit；

The pressure acquiring unit is specially multiple pressure sensors, and multiple pressure sensors are set to reciprocating pressure The inside of contracting machine, including connecting rod pressure sensor and crosshead pin pressure sensor, for detecting compressor multiple piston load Fp, Data after calculating are plotted as showing function by the Data Computation Unit for calculating the data that pressure acquiring unit obtains Scheme and carries out indicator card input；

The Data Computation Unit carries out graphic searching using indicator card of the BFS algorithm to acquisition, from the root section of indicator card Point starts, along the node of the width traversing graph of indicator card, when node is accessed, Stop node traversal；

The input unit is used for the performance parameter of the detected reciprocating compressor of input system, and the storage unit is used for The data and result generate in calculating process to system store, and the storage unit is specially plug type tf card, institute State display unit for showing Data Computation Unit treated data and the relevant Various types of data of compressor deflection；

The main control unit is used to provide operation in the process of running for system and the performance of data processing is supported.

In a preferred embodiment, the performance parameter of the input unit input includes compressor internal gas power Fg, piston inertia power I, piston reciprocating frictional force Fr and compressor crank pin radius r.

In a preferred embodiment, the Data Computation Unit specifically includes following step to the processing of indicator card It is rapid:

Root node is put into the coordinate system of indicator card by step 1 first；

Step 2 takes out first node from indicator card coordinate system, and examines whether it is target, if finding mesh Mark, then terminate to search and return result；

Step 3 does not such as look for target, its all indicator card numerical value that do not examined is added in the coordinate system of indicator card；

Step 4, if queue is sky, i.e., the target not searched in figure terminates to search.

A kind of detection method of the reciprocating compressor reflex angle detection system based on indicator card, specifically includes following step It is rapid:

Step 1, starting reciprocating compressor works, and when compressor crank shaft is in any rotation angle, pressure obtains single Member works, and the value of connecting rod pressure sensor and the detection of crosshead pin pressure sensor in compressor accumulates superposition, obtains and compresses Machine multiple piston load Fp；

Step 2, compressor multiple piston load Fp can be acted on first on crosshead pin, and be transmitted along connecting rod, and connecting rod is to live Dynamic state, the numerical value that main control unit sets the flexible movable angle of connecting rod and cylinder-bore axis as α, and pressure acquiring unit is obtained input To Data Computation Unit, Data Computation Unit calculates connecting rod stress Fc:

Step 3, when connecting rod and axis are at angle α, main control unit setting crosshead presses to the pressure of crosshead slideway N calculates crosshead slideway pressure N using Data Computation Unit:

N=Fptg α；

Step 4, therefore, in compressor operation, the compressor multiple piston load Fp for acting on crosshead pin can be by even Bar stress Fc and crosshead slideway pressure N calculates connecting rod stress Fc and crosshead slideway pressure N difference percentage, obtains compression The size of the deflection A of machine work, specifically:

The data generated in deflection A and deflection A calculating process are stored in storage unit by step 5, main control unit It is interior, and the performance parameter of Data Computation Unit extraction input unit input, i.e. compressor internal gas power Fg, piston inertia power I, Piston reciprocating frictional force Fr and compressor crank pin radius r utilizes above-mentioned data and reflex angle A numeric renderings compressor reflex angle Indicator card, and by indicator card output show on the display unit.

In a preferred embodiment, during carrying out compressor operation, the frictional force of reciprocating member With piston motion on the contrary, its size specifically:

Wherein, Ni is column power, and m is mechanical efficiency.

In a preferred embodiment, the normal value size of the deflection A is 15 ° of 30 ° of < A <.

Technical effect and advantage of the invention:

1, by setting pressure acquiring unit, pressure sensor is set inside reciprocating compressor, monitors compressor work Real-time pressure data during work obtains compressor multiple piston load, it is mixed simultaneously with the basic property parameter of compressor It is calculated, obtains compressor its variation of internal every pressure during the work time during the work time, while utilizing compression Pressure change inside machine obtains the size of the reversed angle value of compressor, obtains in cylinder and moves compared to traditional casing wall aperture The mode of state pressure, it is easy to operate, and the accuracy of data is high, convenient for promoting indicator diagram method in reciprocating compressor fault diagnosis Application in field；

2, the pressure state during the work time such as compressor inner part such as connecting rod and crosshead, and base are obtained by algorithm Be changed, make during detecting reflex angle in the multiple piston load of real-time detection, can by compressor operating state into Row reaction, and to compressor, its own provides maintenance and maintenance, improves the service life of compressor.

Detailed description of the invention

Fig. 1 is system structure diagram of the invention.

Appended drawing reference are as follows: 1 main control unit, 2 storage units, 3 display units, 4 input units, 5 pressure acquiring units, 6 numbers According to computing unit.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.