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CN111648950B - A wireless test system for internal pressure of axial piston pump - Google Patents

A wireless test system for internal pressure of axial piston pump Download PDF

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Publication number
CN111648950B
CN111648950B CN202010526636.5A CN202010526636A CN111648950B CN 111648950 B CN111648950 B CN 111648950B CN 202010526636 A CN202010526636 A CN 202010526636A CN 111648950 B CN111648950 B CN 111648950B
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circuit board
data
wireless
printed circuit
data acquisition
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CN111648950A (en
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王君
武兵
周晓磊
林健
熊晓燕
牛蔺楷
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Taiyuan University of Technology
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Taiyuan University of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

本发明公开一种轴向柱塞泵内部压力无线监测系统，通过在柱塞泵缸体安装微型压力传感器，将压力传感器信通过导线连接至数据采集装置，通过无线方式将数据传输给接收端。系统上电后，数据采集装置处于休眠状态，当接收到上位机发来的开始数据采集信号时，采集端开始进行数据采集，并将数据传输至无线数据接收装置，最终传输至上位机。数据采集结束，可以通过发送数据采集结束命令终止数据采集。该系统采样精度高，使用寿命长，对柱塞泵影响小、可以实现柱塞泵内部压力的实时监测，可为柱塞泵内部压力分析研究提供有效数据。

Figure 202010526636

The invention discloses a wireless monitoring system for the internal pressure of an axial plunger pump. A miniature pressure sensor is installed in the cylinder of the plunger pump, the pressure sensor is connected to a data acquisition device through a wire, and data is wirelessly transmitted to a receiving end. After the system is powered on, the data acquisition device is in a dormant state. When receiving the start data acquisition signal from the host computer, the acquisition end starts data acquisition, and transmits the data to the wireless data receiving device, and finally to the host computer. When the data collection ends, the data collection can be terminated by sending the data collection end command. The system has high sampling accuracy, long service life, little impact on the plunger pump, can realize real-time monitoring of the internal pressure of the plunger pump, and can provide effective data for the analysis and research of the internal pressure of the plunger pump.

Figure 202010526636

Description

Wireless test system for internal pressure of axial plunger pump
Technical Field
The invention belongs to the technical field of wireless testing of internal pressure of a hydraulic axial plunger pump. In particular to an axial plunger pump which can be provided with a pressure sensor.
Background
The hydraulic axial plunger pump is a main power source of a hydraulic system and is widely applied to industrial occasions such as aerospace, engineering machinery and the like. The stability of the output pressure of the plunger pump is directly related to the stability of the whole hydraulic system. The method has great significance for accurately testing the pressure change inside the plunger pump, researching the pressure pulsation forming mechanism of the plunger pump and reducing the vibration and noise of the plunger pump.
In the operation process of the plunger pump, the plunger pump realizes oil suction and discharge through reciprocating motion and rotating motion around a shaft in the plunger cavity. The pressure inside the plunger chamber is to be tested, and the traditional testing method of the wired connection sensor cannot be used. The existing plunger cavity pressure testing method is mostly carried out by using a mercury slip ring and an FM frequency modulation transmitter. However, due to the inherent physical characteristics of the mercury slip ring and the FM transmitter, a large amount of noise is generated in the signal transmission process, the signal to noise ratio is low, and the accuracy of the acquired data is not high.
Disclosure of Invention
The invention provides a method for testing the internal pressure of a plunger pump based on a wireless sensor, aiming at the problems and the defects of the existing method for testing the internal pressure of the plunger pump. The test on the internal pressure of the plunger pump is realized through the miniature pressure sensor, the data acquisition circuit board protection shell, the data receiving circuit board protection shell data acquisition module, the wireless power supply module and the wireless data sending and receiving module.
In order to achieve the purpose, the invention provides the following technical scheme:
a wireless test system for internal pressure of an axial plunger pump comprises a miniature pressure sensor 1, a data processing device 2 connected with the pressure sensor, a wireless data transmitting device 16, a wireless power supply device 19, an electric energy receiving device 18 corresponding to the wireless power supply device, a wireless data receiving device 21, an upper computer 22 connected with the wireless data receiving device, a data acquisition circuit board protective shell and a data receiving circuit board protective shell assembly 8, and a data receiving circuit board protective shell and a data receiving circuit board assembly 9;
the miniature pressure sensor is fixed on the side surface of a plunger cavity 11 of the cylinder body through a sensor fixing hole 10, a lead connected with the miniature sensor is connected with a data processing device 2 fixed at the shaft end through a wiring small hole A12 on the cylinder body and a wiring small hole B14 on a rotating shaft 13, the pressure sensor is led out 4 leads 15 to be connected with a data processing device printed circuit board, wherein 2 leads are signal lines, one lead is a power supply line, and the other lead is a ground line;
the data processing apparatus 2 includes: STM32, an amplifying chip and a peripheral circuit, a filter circuit, an analog-to-digital conversion chip and a peripheral circuit, a TF card and a peripheral circuit and a printed circuit board, wherein the circuits and the chips are welded on the printed circuit board;
the wireless data transmitting device 16 includes: the CC2540 chip, a peripheral circuit, an on-chip antenna, an I/O interface and a printed circuit board are fixedly connected with the printed circuit board through a fixing stud 20 by adopting the printed circuit board antenna, and the transmission of signals and power supply is realized through 4 pins and corresponding female seats;
the power receiving device 18 includes: alternating current-direct current conversion circuit, printed circuit board and copper coil. The wireless electric energy receiving device is fixedly connected with the data acquisition circuit board protective shell through a fixing stud 20, and power supply transmission is realized through 2 pin headers and corresponding female seats;
the wireless data receiving apparatus 21 includes: the device comprises a CC2540 chip, a peripheral circuit, an on-chip antenna, a USB interface and a printed circuit board; the circuit, the module and the interface are integrated on the printed circuit board; the upper computer 22 is positioned beside the plunger pump and is connected with the data receiving device through a USB data line 23 to display pressure information in real time;
the wireless power supply device 19 includes: a DC-AC conversion circuit, a copper coil and a printed circuit board. The circuit related elements and the coil are fixed on the printed circuit board and fixed on the data receiving circuit board protective shell through the stud 34;
data acquisition circuit board protective housing and its subassembly include: the data acquisition circuit board comprises a data acquisition circuit board protective shell 24, a protective cover 25, an A fixing hole 26 and an A screw 27; the data acquisition circuit board protective shell is connected with the threaded hole A37 on the rotating shaft through a screw A, so that the data acquisition circuit board protective shell is fixed on the rotating shaft;
the data receiving circuit board protective housing and its assembly include: a data receiving circuit board protective shell 28, a sealant 29, a B fixing hole 30, a B screw 31 and a wiring hole 33; the data receiving circuit board protective shell realizes the fixation of the data receiving circuit board protective shell on the back cover 32 through a screw B, a threaded hole B35 on the back cover of the plunger pump and a through hole 36 which is adaptive to the shape of the data receiving circuit board protective shell;
the data processing device, the wireless data transmitting device and the electric energy receiving device are fixed in the data acquisition circuit board protective shell through fixing studs; the data acquisition circuit board protective shell is fixed at the shaft end of the rotating shaft 13 through two screws and rotates along with the shaft; the wireless power supply device and the wireless data receiving device are fixed in the data receiving circuit board protective shell through screws; the data receiving circuit board protective shell is fixed on the rear cover 32 through screws and is fixed; the data receiving circuit board protective housing and the data acquisition circuit board protective housing are made of non-metal materials, transmission of electromagnetic wave signals can be guaranteed, and the circuit board is prevented from being corroded by hydraulic oil.
The invention has the following beneficial effects:
1. through introducing wireless data transmission and wireless power supply module, can gather high-speed rotatory plunger cylinder body internal pressure.
2. The wireless data transmission mode improves the signal-to-noise ratio of signals, and the wireless power supply mode increases the running time of the system. The running time and the accuracy of the system are improved.
3. The wiring mode of the miniature pressure sensor and the arrangement of the acquisition device do not influence the normal operation of the plunger pump. The accuracy of the acquired data is ensured.
4. The test system is convenient to install, has small structural change to the plunger pump, and is convenient to implement and apply.
Drawings
FIG. 1 is a three-dimensional view of a plunger pump profile;
FIG. 2 is a system overview;
FIG. 3 is a three-dimensional view of the acquisition device;
FIG. 4 is an exploded view of the collection device;
FIG. 5 is a three-dimensional view of a receiving device;
FIG. 6 is an exploded view of the receiver;
FIG. 7 is a three-dimensional view of the cylinder;
FIG. 8 is a three-dimensional view of the cylinder;
fig. 9 is a three-dimensional view of the back cover.
In the figure: 1-a miniature pressure sensor; 2-a data processing device; 19-a wireless power supply; 18-a power receiving device; 21-a wireless data receiving device; 22-an upper computer; 8-data acquisition circuit board protective housing and its assembly; 9-data receiving circuit board protective housing and its assembly; 10-sensor fixation holes; 11-plunger cavity; 12-A wiring small hole; 13-a rotating shaft; 14-B routing holes; 15-a wire; 16-a wireless data transmitting device; (ii) a 18-a power receiving device; 19-a wireless power supply; 20-fixing studs; (ii) a 22-an upper computer; 23-a USB data line; 24-a data acquisition circuit board protective housing; 25-a protective cover; 26-A fixed hole; 27-A screw; 28-data receiving circuit board protective housing; 29-sealing glue; 30-B fixing holes; 31-B screws; 32-rear cover; 33-wiring holes; 34-a stud; 35-A threaded hole; 36-through hole, 37-B threaded hole
Detailed Description
The detailed technical scheme of the invention is described in the following with the accompanying drawings:
a system for wirelessly testing internal pressure of an axial plunger pump comprises: the device comprises a micro pressure sensor, a data processing device connected with the pressure sensor, a wireless data transmitting device connected with the data processing device, an electric energy receiving device, a wireless power supply device, a wireless data receiving device, an upper computer connected with the wireless data receiving device, a data acquisition circuit board protective shell and a component thereof, and a data receiving circuit board protective shell and a component thereof.
Specifically, a micro pressure sensor is arranged on a transition area of a plunger pump cylinder body. And leading out a signal wire of the pressure sensor through a small wire hole A12 of the cylinder body and a small wire hole B14 at the center of the rotating shaft, and transmitting the signal wire to a data processing device fixed at the shaft end. The data processing device wirelessly transmits the acquired data to a wireless receiving device fixed on a rear cover of the plunger pump, and the acquired data are transmitted to an upper computer through a data line.
In order to accurately acquire the internal pressure of the plunger pump under the condition of not influencing the operation of the plunger pump, the mounting position of the miniature pressure sensor is arranged on the side surface of the cylinder body and close to the transition area of the oil outlet. In order to ensure the transmission of pressure signals, holes are respectively drilled between the two plunger cavities 11 of the cylinder body, the side surface of the rotating shaft and the axial center. The normal operation of the plunger pump and the transmission of signals are not affected.
In order to ensure the collection and wireless receiving and sending of data, install data processing device 2 at the pivot axle head, data processing device includes: STM32, an amplifying chip and peripheral circuit, a filter circuit, an analog-to-digital conversion chip and peripheral circuit, a TF card, related peripheral circuit and a printed circuit board, wherein the circuits and the chips are welded on the printed circuit board; the analog signals collected by the pressure sensor are transmitted to the data processing device through the conducting wire. The signal is amplified, filtered, analog-to-digital converted and finally transmitted out through a wireless data transmitting device. The wireless data transmitting apparatus includes: the antenna comprises an on-chip antenna, a CC2540 radio frequency chip, a related peripheral circuit and a printed circuit board, wherein the circuits and the chip are welded on the printed circuit board; the power receiving device includes: the circuit comprises a copper coil, a related circuit and a printed circuit board, wherein related elements of the circuit are welded on the printed circuit board, and the copper coil is fixed on the printed circuit board through AB glue. Three printed circuit boards are fixed through the studs and the holes designed on the circuit boards
In order to ensure that the internal circuit board of the data processing device is not eroded by the hydraulic oil, the data processing device is fixed in the data acquisition circuit board protective shell 24. In order to ensure that the data acquisition circuit board protective housing is fixed at the shaft end, 2A threaded holes 37 are arranged at the corresponding positions of the shaft end, 2 holes matched with each other in size are arranged at the corresponding positions of the data acquisition circuit board protective housing, and the data acquisition circuit board protective housing is fixed at the shaft end of the rotating shaft through screws. The data acquisition circuit board protective shell is made of a non-metal material, so that transmission of wireless signals is guaranteed.
In order to ensure that the position of the data processing device is fixed in the data acquisition circuit board protective shell, 2 holes are formed in the protective cover of the data acquisition circuit board protective shell, and the size of each hole is matched with the size of the stud for fixing the printed circuit board. When the data processing device is installed, the data acquisition circuit board protective shell is firstly fixed at the shaft end through a screw, then the data processing device is fixed on the protective cover through a screw, finally the protective cover is fixed with the data acquisition circuit board protective shell through threads, and the data processing device is sealed in the data acquisition circuit board protective shell. And coating sealant in the gaps of the structural joints to ensure good sealing.
In order to ensure the normal receiving of wireless data and the supplying of wireless energy, a wireless data receiving device and a wireless power supply device are sealed inside the plunger pump. The plunger pump rear cover is provided with a through hole, and the data receiving circuit board protective shell is embedded into the through hole 36 and fixed on the rear cover through screws. The wireless power supply coil is tightly attached to the protective cover of the data acquisition circuit board protective shell and keeps a short distance with the electric energy receiving coil, and meanwhile, the two coils ensure a concentric shaft, so that the wireless power supply can be smoothly carried out in the running process of the plunger pump. The data receiving circuit board protective housing and the assembly thereof are externally provided with wiring holes, wires are connected with an upper computer through the wiring holes to transmit data out, and meanwhile, power lines also supply power to equipment through the holes.

Claims (6)

1.一种轴向柱塞泵内部压力无线测试系统，其特征在于：包括微型压力传感器(1)、与微型压力传感器连接的数据处理装置(2)、无线数据发射装置(16)、无线供电装置(19)、与无线供电装置相对应的电能接收装置(18)、无线数据接收装置(21)、与无线数据接收装置相连接的上位机(22)、数据采集电路板保护壳及其组件(8)、数据接收电路板保护壳及其组件(9)；1. A wireless testing system for the internal pressure of an axial piston pump, characterized in that: comprising a miniature pressure sensor (1), a data processing device (2) connected with the miniature pressure sensor, a wireless data transmitting device (16), a wireless power supply Device (19), a power receiving device (18) corresponding to a wireless power supply device, a wireless data receiving device (21), a host computer (22) connected to the wireless data receiving device, a data acquisition circuit board protective case and components thereof (8), a data receiving circuit board protective case and its components (9); 所述微型压力传感器固定于柱塞泵缸体侧面，通过一通孔与柱塞腔(11)内部液压油接触，压力传感器的信号线通过缸体上的A走线小孔(12)和转轴上的B走线小孔(14)，与固定在轴端的数据处理装置(2)相连接；The micro pressure sensor is fixed on the side of the cylinder of the plunger pump, and is in contact with the hydraulic oil inside the plunger cavity (11) through a through hole. The small hole (14) for the B wire is connected with the data processing device (2) fixed on the shaft end; 所述数据处理装置包括：STM32、放大芯片及外围电路、滤波电路、模数转换芯片及外围电路、TF卡及外围电路和印制电路板，以上电路及芯片焊接在印制电路板上；The data processing device includes: STM32, amplifying chip and peripheral circuit, filter circuit, analog-to-digital conversion chip and peripheral circuit, TF card and peripheral circuit and printed circuit board, and the above circuits and chips are welded on the printed circuit board; 所述无线数据发射装置包括：CC2540芯片及外围电路、片上天线、I/O接口和印制电路板，以上电路及芯片焊接在印制电路板上；The wireless data transmitting device includes: CC2540 chip and peripheral circuit, on-chip antenna, I/O interface and printed circuit board, and the above circuit and chip are welded on the printed circuit board; 所述电能接收装置包括：铜线圈、交流直流转换电路和印制电路板，交直流转换电路相关元器件焊接在印制电路板上，铜线圈通过AB胶固定在印制电路板背面；The electric energy receiving device includes: a copper coil, an AC-DC conversion circuit and a printed circuit board, the related components of the AC-DC conversion circuit are welded on the printed circuit board, and the copper coil is fixed on the back of the printed circuit board by AB glue; 所述数据采集电路板保护壳及其组件包括：数据采集电路板保护壳(24)、保护盖(25)、固定螺柱(20)、A固定孔(26)和A螺钉(27)；印刷电路板通过固定螺柱结合，然后通过A螺钉固定在数据采集电路板保护壳上；数据采集电路板保护壳通过A螺钉和转轴上的A螺纹孔(37)相连接，实现数据采集电路板保护壳在转轴上的固定；The data acquisition circuit board protective case and its components include: a data acquisition circuit board protective case (24), a protective cover (25), a fixing stud (20), A fixing hole (26) and A screw (27); printing The circuit boards are combined by fixing studs, and then fixed on the data acquisition circuit board protective case by A screws; the data acquisition circuit board protective case is connected with the A threaded hole (37) on the rotating shaft through A screws, so as to realize the protection of the data acquisition circuit board Fixation of the shell on the shaft; 所述无线数据接收装置包括：CC2540芯片及外围电路、片上天线、USB接口和印制电路板；所述电路、模块及接口都集成在印制电路板上；无线数据接收装置通过USB数据线(23)与外部的上位机(22)连接；The wireless data receiving device includes: a CC2540 chip and peripheral circuits, an on-chip antenna, a USB interface and a printed circuit board; the circuits, modules and interfaces are integrated on the printed circuit board; 23) Connect with the external host computer (22); 所述无线供电装置包括：直流-交流转换电路、铜线圈和印制电路板；电路相关元件焊接于印制电路板上，铜线圈通过AB胶粘附于印制电路板上；The wireless power supply device includes: a DC-AC conversion circuit, a copper coil and a printed circuit board; circuit related components are welded on the printed circuit board, and the copper coil is adhered to the printed circuit board by AB glue; 所述数据接收电路板保护壳及其组件包括：数据接收电路板保护壳(28)、密封胶(29)、B固定孔(30)、B螺钉(31)和走线孔(33)，数据接收电路板保护壳通过螺钉、柱塞泵后盖上的B螺纹孔(35)以及与数据接收电路板保护壳形状相适应的通孔(36)，实现数据接收电路板保护壳在后盖(32)上的固定，内部印制电路板通过螺柱(34)固定在外壳当中，直接向数据接收电路板保护壳中注入密封胶实现内部印制电路板与外界的隔离。The data receiving circuit board protective case and its components include: a data receiving circuit board protective case (28), a sealant (29), a B fixing hole (30), a B screw (31) and a wiring hole (33), and the data The receiving circuit board protective shell realizes the data receiving circuit board protective shell on the back cover ( 32), the internal printed circuit board is fixed in the casing through the studs (34), and the sealant is directly injected into the protective casing of the data receiving circuit board to isolate the internal printed circuit board from the outside world. 2.根据权利要求1所述的一种轴向柱塞泵内部压力无线测试系统，其特征在于：所述上位机位于柱塞泵外部，导线通过后盖上的走线孔引出，与固定在柱塞泵后盖内部的无线数据接收装置连接；上位机收到压力信号后可供工作人员查看，工作人员通过上位机向柱塞泵内部的数据处理装置发出开始数据采集、采样率、采样长度和停止采集命令实现无线数据传输与命令交互。2. A wireless testing system for the internal pressure of an axial plunger pump according to claim 1, characterized in that: the host computer is located outside the plunger pump, and the wires are drawn out through the wiring holes on the back cover, and are fixed on the back cover. The wireless data receiving device inside the back cover of the plunger pump is connected; after the host computer receives the pressure signal, it can be viewed by the staff, and the staff sends the start data collection, sampling rate, sampling length to the data processing device inside the plunger pump through the host computer and stop collection command to realize wireless data transmission and command interaction. 3.根据权利要求1所述的一种轴向柱塞泵内部压力无线测试系统，其特征在于：所述的微型压力传感器固定于柱塞泵缸体侧面，靠近出油口处，其传感器固定孔(10)的位置不会影响柱塞泵的正常运行，且始终与柱塞腔内液压油相接触；传感器导线通过缸体和转轴上的A走线小孔引出，连接至轴端的数据处理装置；缸体上的A走线小孔(12)的位置位于两柱塞腔之间的实体，从缸体侧面贯穿至缸体中心，其尺寸大小在保证导线通过的情况下尽可能小；转轴上的B走线小孔(14)呈“L”型，两段孔分别位于转轴轴端沿轴向和转轴侧面沿径向，轴向孔深度与缸体上A走线小孔(12)的位置相对应；转轴B走线小孔的尺寸与传感器导线粗细相适应。3. A wireless testing system for the internal pressure of an axial piston pump according to claim 1, characterized in that: the micro pressure sensor is fixed on the side of the cylinder of the piston pump, near the oil outlet, and the sensor is fixed The position of the hole (10) will not affect the normal operation of the plunger pump, and it is always in contact with the hydraulic oil in the plunger cavity; the sensor wire is led out through the A wire hole on the cylinder block and the rotating shaft, and is connected to the data processing of the shaft end The device; the position of the A wiring hole (12) on the cylinder body is located in the entity between the two plunger cavities, and penetrates from the side of the cylinder body to the center of the cylinder body, and its size is as small as possible under the condition of ensuring the passage of the wire; The B line hole (14) on the rotating shaft is in an "L" shape. The two holes are located at the shaft end of the rotating shaft in the axial direction and the rotating shaft side in the radial direction. The depth of the axial hole is the same as that of the A line hole (12) on the cylinder block. ) in the corresponding position; the size of the small hole for the wiring of the shaft B is adapted to the thickness of the sensor wire. 4.根据权利要求1所述的一种轴向柱塞泵内部压力无线测试系统，其特征在于：所述数据处理装置、无线数据发射装置、数据接收电路板保护壳及其组件通过螺钉固定于转轴的轴端，随转轴旋转；所述无线数据接收装置、数据采集电路板保护壳及其组件通过螺钉和后盖上的通孔(36)固定于后盖，保持静止；数据接收电路板保护壳和数据采集电路板保护壳采用电磁波可以穿透的非金属装置，其强度可以承受柱塞泵壳与柱塞泵缸体之间的液压油压力和转轴旋转冲击；数据接收电路板保护壳和数据采集电路板保护壳位置在同一条轴线上，两者之间的距离与无线供电距离和柱塞泵内部空间尺寸相适应。4. A wireless testing system for the internal pressure of an axial piston pump according to claim 1, characterized in that: the data processing device, the wireless data transmitting device, the data receiving circuit board protective shell and its components are fixed to the The shaft end of the rotating shaft rotates with the rotating shaft; the wireless data receiving device, the data acquisition circuit board protective shell and its components are fixed to the back cover through screws and through holes (36) on the back cover, and remain stationary; the data receiving circuit board is protected The shell and the data acquisition circuit board protective shell are non-metallic devices that can be penetrated by electromagnetic waves, and their strength can withstand the hydraulic oil pressure between the plunger pump shell and the plunger pump cylinder and the impact of the rotation of the shaft; the data receiving circuit board protective shell and The protective casing of the data acquisition circuit board is located on the same axis, and the distance between the two is suitable for the distance of the wireless power supply and the internal space size of the plunger pump. 5.根据权利要求1所述的一种轴向柱塞泵内部压力无线测试系统，其特征在于：数据采集电路板保护壳及其组件由数据采集电路板保护壳、保护盖、4个螺钉和2个螺柱组成，2个螺柱与数据处理装置、电能接收装置和无线数据发射装置的印制电路板上通孔相适应，通过与2个螺钉配合将上述装置固定于数据采集电路板保护壳内；另外2个螺钉与转轴上的A螺纹孔相适应，将数据采集电路板保护壳固定在转轴轴端。5. The wireless testing system for the internal pressure of an axial piston pump according to claim 1, wherein the data acquisition circuit board protective shell and its components are composed of a data acquisition circuit board protective shell, a protective cover, four screws and It is composed of 2 studs, and the 2 studs are adapted to the through holes on the printed circuit board of the data processing device, the power receiving device and the wireless data transmitting device. By cooperating with the 2 screws, the above devices are fixed on the data acquisition circuit board for protection The other two screws are adapted to the A threaded holes on the rotating shaft, and the protective casing of the data acquisition circuit board is fixed on the shaft end of the rotating shaft. 6.根据权利要求1所述的一种轴向柱塞泵内部压力无线测试系统，其特征在于：数据接收电路板保护壳及其组件由数据接收电路板保护壳、2个螺钉和2个螺柱组成；数据接收电路板保护壳法兰结构通过螺钉将其固定在后盖上，通过密封胶注入缝隙实现密封；通过向数据接收电路板保护壳内部充填密封胶，实现内部印制电路板与液压油的隔离。6. The wireless test system for the internal pressure of an axial piston pump according to claim 1, wherein the data receiving circuit board protective case and its components are composed of the data receiving circuit board protective case, 2 screws and 2 screws. The data receiving circuit board protective shell flange structure is fixed on the back cover by screws, and the sealant is injected into the gap to achieve sealing; by filling the data receiving circuit board protective shell with sealant, the internal printed circuit board and the internal printed circuit board are realized. Isolation of hydraulic oil.
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CH641907A5 (en) * 1979-03-27 1984-03-15 Burckhardt Ag Maschf Device for monitoring the operational characteristic of the valves of a piston compressor
JP2000274378A (en) * 1999-03-24 2000-10-03 Hitachi Constr Mach Co Ltd Operating condition diagnostic device for hydraulic rotating machine
CN101413838B (en) * 2008-11-07 2010-12-15 浙江大学 Apparatus for measuring plunger sub-oil film viscous friction
US9989048B2 (en) * 2015-07-27 2018-06-05 Caterpillar Inc. End of stroke detection for plunger velocity correction
CN106209564A (en) * 2016-08-29 2016-12-07 宝鸡航天动力泵业有限公司 Reciprocating pump intelligent remote monitoring system
US20180087499A1 (en) * 2016-09-23 2018-03-29 Caterpillar Inc. System for detecting faults in a pump
CN108266361B (en) * 2017-12-01 2023-09-26 北京理工大学 A multifunctional axial piston pump test prototype and test system for research
CN208942932U (en) * 2018-03-09 2019-06-07 王福岗 A kind of gastroenterology nursing liquid food feedway

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