CN111536926A - Automatic measurement system and plunger pump measurement method - Google Patents

Automatic measurement system and plunger pump measurement method Download PDF

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Publication number
CN111536926A
CN111536926A CN202010291283.5A CN202010291283A CN111536926A CN 111536926 A CN111536926 A CN 111536926A CN 202010291283 A CN202010291283 A CN 202010291283A CN 111536926 A CN111536926 A CN 111536926A
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distance
parallelism
measuring
cylinder
measurement
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CN111536926B (en
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李小伟
尹雪明
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Xian Aerospace Precision Electromechanical Institute
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Xian Aerospace Precision Electromechanical Institute
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects

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  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The invention provides an automatic measuring system and a plunger pump measuring method, which solve the problems of high production cost, low production efficiency and wrong assembly and neglected assembly caused by the manual mode adopted by the conventional product measurement. The automatic measuring system comprises a parallelism measuring device, a conveying device and a distance measuring device; the parallelism measuring device and the distance measuring device are used for measuring a measured product, and the conveying device is used for conveying the measured product to the measuring stations of the parallelism measuring device and the distance measuring device. The automatic measurement system has the advantages that the whole measurement process is free of human intervention, automation is realized, the labor intensity of workers is reduced, the accuracy of data acquisition and processing is improved, and the working efficiency is greatly improved.

Description

Automatic measurement system and plunger pump measurement method
Technical Field
The invention relates to the field of measurement, in particular to an automatic measurement system and a plunger pump measurement method.
Background
The plunger pump is applied under the working conditions of high pressure, large flow, high power and flow regulation, and is particularly widely applied to the fields of planing machines, broaching machines, hydraulic machines, engineering machinery, agricultural machinery, mining metallurgical machinery, ship shipping and the like because of high pressure, compact structure, high efficiency, stable performance and convenient flow regulation. The plunger pump provides power by means of reciprocating motion of the piston, a movable inclined structure is arranged on a transmission shaft of the plunger pump in order to enable the plunger pump to have reciprocating motion, when the transmission shaft drives a cylinder body to rotate, a swash plate pulls out or pushes back the plunger from the cylinder body to complete the oil suction and discharge process, and a variable mechanism changes the discharge capacity of the pump by adjusting the inclination angle of the swash plate.
The plunger pump mainly comprises a transmission shaft, a pump cavity, a pump cover, a rotor, an adjustable swash plate and the like, the plunger pump is large in demand in the industry, particularly the plunger pump with high performance and high precision, but the production and measurement of the plunger pump generally adopts a manual mode, the production efficiency is low, the labor cost is high, and the vigorous market demand and the production supply with extremely low efficiency generate more and more obvious contradictions. Meanwhile, measurement, recording and data processing in the precise assembly process of the plunger pump are greatly influenced by human factors, and are inevitably brought into artificial errors, so that wrong assembly and neglected assembly are easy to realize during core component selection. Meanwhile, the measurement of other similar products, such as speed reducers, engines, pumps, gearboxes and the like, has the same problem.
Disclosure of Invention
The invention aims to solve the problems of high production cost and low production efficiency caused by the manual mode adopted by the conventional product measurement, and provides an automatic measurement system and a plunger pump measurement method.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
an automatic measuring system comprises a parallelism measuring device, a conveying device and a distance measuring device; the parallelism measuring device and the distance measuring device are used for measuring a measured product, the conveying device is used for conveying the measured product and conveying the measured product to measuring stations of the parallelism measuring device and the distance measuring device; the parallelism measuring device comprises a parallelism measuring support, a parallelism rotary table, a parallelism air cylinder and a parallelism contact sensor; the parallelism rotary table is arranged on the parallelism measuring support, the cylinder body of the parallelism air cylinder is arranged at the output end of the parallelism rotary table, and the parallelism contact-type sensor is arranged on the sensor support connected with the parallelism air cylinder guide rod; the distance measuring device comprises a distance measuring bracket, a distance servo motor, a distance one-dimensional moving assembly, a distance measuring rotary table, a distance measuring cylinder and a distance measuring contact type sensor; the distance servo motor and the distance one-dimensional moving assembly are arranged on the distance measuring support, the distance measuring rotary table is arranged on the distance one-dimensional moving assembly, and the distance one-dimensional moving assembly drives the distance measuring rotary table to realize linear movement under the driving of the distance servo motor; the cylinder body of the distance measuring cylinder is arranged at the output end of the distance measuring rotary table, and the distance measuring contact type sensor is arranged on a sensor support connected with a guide rod of the distance measuring cylinder.
Furthermore, the parallelism contact sensor is arranged on a sensor support connected with the parallelism cylinder guide rod through a double-diaphragm coupling with deflection, and the distance measurement contact sensor is arranged on a sensor support connected with the distance measurement cylinder guide rod through a double-diaphragm coupling with deflection.
Further, the distance measuring device also comprises a turntable connecting plate and a turntable guide rail; the distance measurement turntable is arranged on the turntable connecting plate, one end of the turntable connecting plate is connected with the output of the distance one-dimensional moving assembly, and the other end of the turntable connecting plate is arranged on the turntable guide rail and can slide on the turntable guide rail.
Further, the conveying device comprises a tooling plate, a tray and a double-speed chain; the measured product is arranged on the tray, the tray is arranged on the tooling plate, and the tooling plate drives the measured product on the tray to enter a measuring station under the conveying of the speed multiplying chain.
Furthermore, the conveying device further comprises a conveying one-dimensional moving assembly, the conveying one-dimensional moving assembly is installed on the tooling plate, the tray is arranged on the conveying one-dimensional moving assembly, and the conveying one-dimensional moving assembly drives the measured product on the tray to realize position adjustment.
Further, the parallelism air cylinder is installed at the output end of the parallelism rotary table through an air cylinder connecting plate.
Further, the distance measuring cylinder is installed at the output end of the distance measuring rotary table through a cylinder connecting plate.
Further, the parallelism cylinder and the distance measuring cylinder adopt a thin-type belt guide rod cylinder.
Meanwhile, the invention also provides a plunger pump measuring method based on the automatic measuring system, which comprises the following steps:
firstly, moving a plunger pump to a measuring station of a parallelism measuring device;
secondly, measuring the parallelism of the adjustable swash plate by a parallelism measuring device;
2.1) the parallelism cylinder drives the parallelism contact sensor to move downwards, a measuring head of the parallelism contact sensor contacts the adjustable swash plate, the parallelism contact sensor starts to read after being compressed, and the distance L between the upper plane of the pump cavity and the adjustable swash plate is obtained by taking the upper plane of the pump cavity as a reference plane1After reading is finished, the parallelism contact sensor returns to the initial position;
2.2) the parallelism rotary table drives the parallelism contact sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 2.1) is repeated to respectively obtain a measurement value L2、L3、L4；
2.3) calculating Q1-3、Q2-4，Q1-3＝|L1-L3|，Q2-4＝|L2-L4If Q1-3、Q2-4If the required value is met, the parallelism of the adjustable swash plate is qualified, the next step is executed, and if the parallelism of the adjustable swash plate is not met, the adjustable swash plate is returned to be processed;
moving the plunger pump to a measuring station of the distance measuring device;
measuring the distance between the pump cavity and the oil bowl by using a distance measuring device;
4.1) sleeving a first transition tool on a transmission shaft at the pump side of the plunger pump, wherein the first transition tool is positioned above the oil bowl;
4.2) moving the distance one-dimensional moving assembly to move the distance measurement contact sensor to a measurement position, driving the distance measurement contact sensor to move downwards by the distance measurement cylinder, contacting a measuring head of the distance measurement contact sensor with the upper surface of the first transition tool, and compressing the distance measurement contact sensorThe reading is started by the device, the upper plane of the pump cavity is taken as a reference plane, and the distance hp between the upper plane of the pump cavity and the upper surface of the first transition tool is obtained1After the reading is finished, the distance measurement contact sensor returns to the initial position;
4.3) the distance measuring turntable drives the distance measuring contact type sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 4.2) is repeated to respectively obtain the measured value hp2、hp3、hp4；
4.4) reaction of hp1、hp2、hp3、hp4Summing the axial length NP of the first transition tool to obtain the distance Hp between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hp2、Hp3、Hp4And for Hp1、Hp2、Hp3、Hp4Calculating an average value Hp, and recording the average value Hp as a pump side measured value Hp of the plunger pump in the batch;
4.5) sleeving a second transition tool on the transmission shaft at the side of the plunger pump motor, positioning the second transition tool above the oil bowl, and repeating the steps 4.2) to 4.4) to obtain the distance Hm between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hm2、Hm3、Hm4And to Hm1、Hm2、Hm3、Hm4Calculating an average value Hm, and recording the average value Hm as a measured value Hm of the motor side of the plunger pump of the batch;
step five, measuring the distance between the top surface of the rotor and the joint surface of the pump cover by using a distance measuring device;
5.1) arranging a third transition tool on the rotor at the pump side of the plunger pump, wherein the third transition tool is positioned above the rotor, and the distance between the upper surface of the third transition tool and the top surface of the rotor is Cp;
5.2) moving the distance one-dimensional moving assembly to move the distance measurement contact sensor to a measurement position, driving the distance measurement contact sensor to move downwards by the distance measurement cylinder, enabling a measuring head of the distance measurement contact sensor to contact the upper surface of the third transition tool, starting reading of the distance measurement contact sensor after compression, and obtaining the distance sp between the pump cover joint surface and the upper surface of the third transition tool by taking the pump cover joint surface as a reference surface1Read, readAfter counting, returning the distance measurement contact sensor to the initial position;
5.3) the distance measuring turntable drives the distance measuring contact type sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 5.2) is repeated to respectively obtain a measured value sp2、sp3、sp4；
5.4) mixing of sp1、sp2、sp3、sp4Calculating the difference with Cp to obtain the distance Sp between the top surface of the rotor and the joint surface of the pump cover1、Sp2、Sp3、Sp4And to Sp1、Sp2、Sp3、Sp4Calculating an average value Sp, and recording the average value Sp as a pump side measured value Sp of the plunger pump of the batch;
5.5) sleeving a fourth transition tool on the rotor at the motor side of the plunger pump, wherein the fourth transition tool is positioned above the rotor, and the distance between the upper surface of the fourth transition tool and the top surface of the rotor is Cm; repeating the steps 5.2) to 5.4) to obtain the distance Sm between the top surface of the rotor and the joint surface of the pump cover1、Sm2、Sm3、Sm4And to Sm1、Sm2、Sm3、Sm4And calculating an average value Sm and recording the average value Sm as a measured value Sm of the plunger pump motor of the batch.
Further, between the first step and the second step, the method also comprises the step of calibrating the parallelism touch sensor and the distance measurement touch sensor: a) selecting standard gauge blocks with the same height as the measured distance; b) respectively measuring by adopting manual and contact sensors, and constructing a linear relation of measured values; c) and (5) importing the linear relation into a control system, and completing calibration.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. when the automatic measuring system is used for measuring products, the measured products are placed on the tooling plate, the measured products are automatically measured after entering the measuring station, and the measured data are stored in the database of the background for processing.
2. The automatic measuring system adopts the high-precision contact sensor for measurement, improves the measuring precision, increases the yield of products, adopts the double-diaphragm coupling with deflection, utilizes the compressible characteristic of axial deflection to construct a measuring reference surface, and solves the problem that the difference of the measured reference surface is large because the supplied materials are different when the materials are conveyed by the speed doubling chain.
3. The automatic measurement system of the invention introduces the measurement automation and informatization into the measurement field, has wide application prospect, can be copied and popularized in the measurement aspects of products such as speed reducers, engines, pumps, gearboxes and the like, and has wide application range.
Drawings
FIG. 1 is a schematic structural diagram of a parallelism measuring apparatus according to the present invention;
FIG. 2 is a schematic view of the measuring points of the adjustable swash plate parallelism of the present invention;
FIG. 3 is a schematic structural diagram of the distance measuring device of the present invention;
FIG. 4 is a partially enlarged schematic view of a distance measuring device according to the present invention;
FIG. 5 is a schematic view of a preferred structure of the distance measuring device of the present invention;
FIG. 6 is a first schematic diagram illustrating the measurement of the distance between the pump cavity and the oil bowl according to the present invention;
FIG. 7 is a second schematic diagram of the distance measurement between the pump cavity and the oil bowl according to the present invention;
FIG. 8 is a third schematic view of the distance measurement between the pump cavity and the oil bowl according to the present invention;
FIG. 9 is a schematic view of a measuring point of the distance between the pump cavity and the oil bowl;
FIG. 10 is a schematic view of the distance measurement between the top surface of the rotor and the joint sealing surface of the pump cover according to the present invention;
FIG. 11 is a schematic view of the measuring points of the distance between the top surface of the rotor and the joint surface of the pump cover.
Reference numerals: 101-parallelism measuring support, 102-parallelism rotary table, 103-parallelism air cylinder, 104-parallelism contact sensor, 105-deflection double-diaphragm coupling, 106-air cylinder connecting plate, 107-sensor support, 108-adjustable swash plate, 201-distance measuring support, 202-distance servo motor, 203-distance one-dimensional moving component, 204-distance measuring rotary table, 205-distance measuring air cylinder, 206-distance measuring contact sensor, 207-rotary table connecting plate, 208-rotary table guide rail, 209-first transition tool, 210-second transition tool, 211-third transition tool, 212-fourth transition tool, 213-transmission shaft, 214-oil bowl, 215-pump cover, 216-rotor, 301-tooling plate, 302-pallet, 303-transport one-dimensional moving assembly, 304-multiple speed chain.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The invention provides an automatic measuring system which can complete the parallelism measurement of an adjustable swash plate of a plunger pump, the measurement of the distance between a pump cavity and an oil bowl and the measurement of the distance between the top surface of a rotor and a joint surface of a pump cover, record and store measured values in a database and process data at the background. Similarly, the system can be copied and popularized in the aspects of measuring products such as a speed reducer, an engine, a pump, a gearbox and the like, and can be used for measuring the installation size of the products and guiding assembly.
The automatic measuring system comprises a parallelism measuring device, a conveying device and a distance measuring device; the parallelism measuring device and the distance measuring device are used for measuring a measured product, and the conveying device is used for conveying the measured product to the measuring stations of the parallelism measuring device and the distance measuring device. The automatic measuring system avoids errors of manual measurement, recording and data processing, improves the accuracy of the measuring process and greatly improves the working efficiency.
As shown in fig. 1, the parallelism measuring apparatus includes a parallelism measuring support 101, a parallelism turntable 102, a parallelism cylinder 103, and a parallelism touch sensor 104. The parallelism rotary table 102 is arranged on the parallelism measuring support 101, the cylinder body of the parallelism air cylinder 103 is arranged at the output end of the parallelism rotary table 102, and the parallelism contact-type sensor 104 is arranged on the guide rod of the parallelism air cylinder 103. Specifically, in order to realize convenient and reliable connection, a parallelism cylinder 103 is mounted on the parallelism rotary table 102 through a cylinder connecting plate 106, and a parallelism contact sensor 104 is mounted on a guide rod of the parallelism cylinder 103 through a sensor support 107. The parallelism cylinder 103 may specifically employ a thin-type belt guide cylinder.
As shown in fig. 3 and 4, the distance measuring apparatus includes a distance measuring stand 201, a distance servo motor 202, a distance one-dimensional moving assembly 203, a distance measuring turntable 204, a distance measuring cylinder 205, and a distance measuring touch sensor 206. The distance one-dimensional moving assembly 203 and the distance servo motor 202 are arranged on the distance measuring support 201, the distance measuring rotary table 204 is arranged on the distance one-dimensional moving assembly 203, and the distance one-dimensional moving assembly 203 drives the distance measuring rotary table 204 to realize linear movement under the driving of the distance servo motor 202. The cylinder body of the distance measuring cylinder 205 is mounted on the output end of the distance measuring turntable 204, and the distance measuring touch sensor 206 is mounted on the guide rod of the distance measuring cylinder 205. Specifically, in order to achieve convenient and reliable connection, the distance measuring cylinder 205 is mounted at the output end of the distance measuring turntable 204 through the cylinder connecting plate 106, the distance measuring contact sensor 206 is mounted on the guide rod of the distance measuring cylinder 205 through the sensor support 107, and the distance measuring cylinder 205 may specifically adopt a thin-type belt guide rod cylinder.
As shown in fig. 5, the distance measuring device further includes a turntable attachment plate 207 and a turntable guide 208; the turntable guide rail 208 is mounted on the distance measurement support 201, the distance measurement turntable 204 is mounted on the turntable connecting plate 207, one end of the turntable connecting plate 207 is connected with the output of the distance one-dimensional moving assembly 203, and the other end of the turntable connecting plate is arranged on the turntable guide rail 208 and can slide on the turntable guide rail 208.
In the above-described apparatus, the parallelism touch sensor 104 and the distance-measuring touch sensor 206 are mounted on the sensor holder 107 by the double diaphragm coupling 105 with deflection. The measuring mechanism adopts the double-diaphragm coupling 105 with deflection, and utilizes the axial compressibility thereof to construct a measuring reference surface of the plunger pump, so that the sensor bracket 107 is completely attached to the measuring reference surface, the problem that the difference of the measuring reference surface is large when the plunger pump is conveyed by the speed doubling chain 304 due to different supplied materials is solved, thereby improving the measuring precision, increasing the yield of the plunger pump,
as shown in fig. 3 and 5, the conveying device includes a tooling plate 301, a tray 302, and a double speed chain 304; the product to be measured is arranged on the tray 302, the tray 302 is arranged on the tooling plate 301, and the tooling plate 301 drives the product to be measured on the tray 302 to enter a measuring station under the conveying of the speed doubling chain 304. The unit further comprises a conveying one-dimensional moving assembly 303, the conveying one-dimensional moving assembly 303 is installed on the tooling plate 301, the tray 302 is arranged on the conveying one-dimensional moving assembly 303, and the conveying one-dimensional moving assembly 303 drives a measured product on the tray 302 to realize position adjustment so as to adapt to measurement at different positions.
Based on the automatic measuring system, the invention can realize the parallelism measurement of the adjustable swash plate of the plunger, the distance measurement of the pump cavity and the oil bowl and the distance measurement of the joint surface between the top surface of the rotor and the pump cover, and the whole measuring process is free from human participation, thereby realizing man-machine isolation, ensuring the safety of personnel, reducing the working strength and improving the working efficiency. The invention relates to a plunger pump measuring method based on the automatic measuring system, which comprises the following steps:
firstly, moving a plunger pump to a measuring station of a parallelism measuring device;
secondly, the parallelism measuring device measures the parallelism of the adjustable swash plate 108;
2.1) the parallelism cylinder 103 drives the parallelism contact-type sensor 104 to move downwards, a measuring head of the parallelism contact-type sensor 104 contacts the adjustable swash plate 108, the parallelism contact-type sensor 104 starts to read after being compressed, and the distance L between the upper plane of the pump cavity and the adjustable swash plate 108 is obtained by taking the upper plane of the pump cavity as a reference plane1The parallelism touch sensor 104 returns to the initial position after the reading is completed;
2.2) the parallelism turntable 102 drives the parallelism contact-type sensor 104 to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 2.1) is repeated to respectively obtain a measurement value L2、L3、L4；
2.3) calculating Q1-3、Q2-4，Q1-3＝|L1-L3|，Q2-4＝|L2-L4If Q1-3、Q2-4While satisfying the required value, the adjustable swash plate 108If the parallelism is qualified, the next step is executed, and if the parallelism is not qualified, the adjustable swash plate 108 is returned to be processed;
moving the plunger pump to a measuring station of the distance measuring device;
step four, the distance measuring device measures the distance between the pump cavity and the oil bowl 214;
4.1) sleeving a first transition tool 209 on a transmission shaft 213 on the pump side of the plunger pump, wherein the first transition tool 209 is positioned above an oil bowl 214;
4.2) moving from the one-dimensional moving assembly 203 to move the distance measurement contact sensor 206 to a measurement position, driving the distance measurement contact sensor 206 to move downwards by the distance measurement cylinder 205, enabling a measuring head of the distance measurement contact sensor 206 to contact with the upper surface of the first transition tool 209, starting reading by the distance measurement contact sensor 206 after compression, and obtaining the distance hp between the upper plane of the pump cavity and the upper surface of the first transition tool 209 by taking the upper plane of the pump cavity as a reference plane1The distance measuring touch sensor 206 returns to the initial position after the reading is completed;
4.3) the distance measuring turntable 204 drives the distance measuring contact type sensor 206 to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 4.2) is repeated to respectively obtain the measured value hp2、hp3、hp4；
4.4) reaction of hp1、hp2、hp3、hp4The axial length NP of the first transition tool 209 is summed to obtain the distance Hp between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hp2、Hp3、Hp4And for Hp1、Hp2、Hp3、Hp4Calculating an average value Hp, and recording the average value Hp as a pump side measured value Hp of the plunger pump in the batch;
4.5) sleeving a second transition tool 210 on a transmission shaft 213 at the motor side of the plunger pump, positioning the second transition tool 210 above an oil bowl 214, and repeating the steps 4.2) to 4.4) to obtain the distance Hm between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hm2、Hm3、Hm4And to Hm1、Hm2、Hm3、Hm4Calculating an average value Hm, and recording the average value Hm as a measured value Hm of the motor side of the plunger pump of the batch;
step five, measuring the distance between the top surface of the rotor and the joint surface of the pump cover by using a distance measuring device;
5.1) arranging a third transition tool 211 on the rotor 216 on the pump side of the plunger pump, wherein the third transition tool 211 is positioned above the rotor 216, and the distance between the upper surface of the third transition tool 211 and the top surface of the rotor 216 is Cp;
5.2) moving the distance one-dimensional moving component 203 to move the distance measurement contact sensor 206 to a measurement position, driving the distance measurement contact sensor 206 to move downwards by the distance measurement cylinder 205, enabling a measuring head of the distance measurement contact sensor 206 to contact the upper surface of the third transition tool 211, starting reading of the distance measurement contact sensor 206 after compression, and obtaining a distance sp (sp) between the pump cover joint surface and the upper surface of the third transition tool 211 by taking the pump cover joint surface as a reference surface1The distance measuring touch sensor 206 returns to the initial position after the reading is completed;
5.3) the distance measuring turntable 204 drives the distance measuring contact type sensor 206 to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 5.2) is repeated to respectively obtain a measured value sp2、sp3、sp4；
5.4) mixing of sp1、sp2、sp3、sp4Calculating the difference with Cp to obtain the distance Sp between the top surface of the rotor and the joint surface of the pump cover1、Sp2、Sp3、Sp4And to Sp1、Sp2、Sp3、Sp4Calculating an average value Sp, and recording the average value Sp as a pump side measured value Sp of the plunger pump of the batch;
5.5) sleeving a fourth transition tool 212 on the rotor 216 on the motor side of the plunger pump, wherein the fourth transition tool 212 is positioned above the rotor 216, and the distance between the upper surface of the fourth transition tool 212 and the top surface of the rotor 216 is Cm; repeating the steps 5.2) to 5.4) to obtain the distance Sm between the top surface of the rotor and the joint surface of the pump cover1、Sm2、Sm3、Sm4And to Sm1、Sm2、Sm3、Sm4Calculating the average value Sm and recording the average value Sm as the plunger of the batchPump motor side measurement Sm.
In addition, when the contact sensor is used for distance measurement test for the first time, the contact sensor is calibrated, standard gauge blocks with the same height as the measured distance are selected, manual measurement and the contact sensor are adopted for measurement respectively, the linear relation of the measured values is constructed, and the linear relation is led into the control system. After the calibration of the contact sensor is completed, in the measurement process of the plunger pump, the data is processed by utilizing the calibrated linear relation at the background, and the accuracy of the measured data is further improved.
The process of the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the parallelism measuring device measures the parallelism of the adjustable swash plate 108 in detail as follows: the tooling plate 301 drives the plunger pump on the tray 302 to enter the parallelism measuring station and stop under the conveying of the double-speed chain 304. Under the command of PLC, the parallelism rotary table 102 is started to return to zero to drive the parallelism air cylinder 103 to rotate to the 1 st measuring position L1Directly above, under the command of a PLC, an electromagnetic valve of a parallelism air cylinder 103 is opened, an air cylinder guide rod is popped up, and a parallelism contact type sensor 104 moves towards an adjustable swash plate 108 of a pump cavity under the connection of a deflection double-diaphragm coupling 105 until the lower plane of a sensor support 107 is completely attached to the upper plane of the pump cavity, so that the parallelism air cylinder is tightly light-proof. After the gauge head of the parallelism contact sensor 104 is compressed by pressure, the parallelism contact sensor 104 starts reading, and this state is maintained for 3S, and the measured value is stored in the database. Under the command of the PLC, the electromagnetic valve is closed, and the cylinder guide rod drives the parallelism cylinder 103 to retract to the full-closed position of the cylinder. Under the command of PLC, the parallelism rotary table 102 drives the parallelism air cylinder 103 to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the measuring points L are repeatedly measured1And sequentially measuring L2、L3、L4Measured value of a measuring point is recorded in a database, and is pressed according to Q under the command of a PLC1-3＝|L1-L3|，Q2-4＝|L2-L4I carry out data calculation if Q1-3≤0.1mm,Q2-4When the angle is less than or equal to 0.1mm and the angle is satisfied, the parallelism of the adjustable swash plate 108 is qualified.
As shown in fig. 6 to 9, the detailed process of the distance measuring device for measuring the pump cavity and oil bowl distances Hp and Hm is as follows: the tooling plate 301 drives the plunger pump on the tray 302 to enter a measuring station under the conveying of the speed multiplying chain 304, under the command of the PLC, the distance servo motor 202 drives the distance measuring rotary table 204 on the distance one-dimensional moving assembly 203 (specifically, a KK86 module) to enter a pump side measuring position of the plunger pump, the distance measuring rotary table 204 returns to zero, and the distance measuring cylinder 205 is driven to rotate to a1 st measuring point position P1The distance measuring cylinder 205 is under the command of PLC, the electromagnetic valve is opened, the cylinder guide rod is popped out, the distance measuring contact type sensor 206 moves towards the upper plane of the pump cavity of the plunger pump under the connection of the deflection double-diaphragm coupling 105, when the measuring head of the distance measuring contact type sensor 206 contacts the first transition tool 209, the distance measuring contact type sensor 206 starts reading, the cylinder guide rod is continuously popped out until the deflection double-diaphragm coupling 105 is pressed, the lower plane of the sensor bracket 107 is completely attached to the measuring reference plane of the pump cavity and is tightly light-tight, the state is kept for 3S, the value is recorded and stored in a database, under the command of PLC, the electromagnetic valve is closed, the cylinder guide rod is retracted, and the distance measuring contact type sensor 206 is driven by the distance measuring device to return to the initial position of the measuring point far away from the measuring reference plane of the pump cavity.
Under the command of PLC, the distance measurement rotary table 204 drives the distance measurement cylinder 205 to rotate 90 degrees clockwise, the test process of the 1 st test point is repeated, and the 2 nd test point P is carried out2After the measurement and the test are finished, the data are stored in a database, the distance measurement rotary table 204 drives the distance measurement cylinder 205 to rotate clockwise 180 degrees and 270 degrees in sequence respectively to measure the 3 rd measuring point P3And the 4 th measuring point P4And sequentially storing the data in a database, and under the command of the PLC, storing the No. P1～P4And (4) taking the values of the measuring points to obtain an average value, and recording the average value as the measured value of the pump side Hp of the batch of the model. Under the command of the PLC, the distance measuring rotary table 204 drives the distance measuring cylinder 205 to sequentially enter a motor side test position m of the plunger pump1～m4Repeating the measurement process on the pump side under the command of the PLC and proceeding in the backgroundAnd (5) calculating line number, and recording the measured value of the motor side Hm of the batch of the model.
As shown in fig. 10 and 11, the distance measuring device measures the distance between the top surface of the rotor and the joint surface of the pump cover in detail as follows: under the command of a PLC, a built-in servo motor of a conveying one-dimensional moving assembly 303(KA170 module) is started, a tray 302 with a plunger pump moves to a test position and stops, under the drive of a distance servo motor 202, a distance one-dimensional moving assembly 203 with a distance measuring rotary table 204 under the guide of a rotary table guide rail 208 enters a pump side test position and stops, under the command of the PLC, the distance measuring rotary table 204 is started and returns to zero to drive a distance measuring cylinder 205 to move to a1 st test point Sp1, under the command of the PLC, an electromagnetic valve is opened, a cylinder guide rod pops out, a distance measuring contact type sensor 206 with the connection of a deflection double-diaphragm coupling 105 moves to a measurement surface of a third transition tool 211 on the pump side, when a measuring head of the distance measuring contact type sensor 206 contacts the third transition tool 211, the distance measuring contact type sensor 206 starts reading, the cylinder guide rod continuously pops out, until the double-diaphragm coupling 105 with flexibility is pressed, the lower plane of the sensor support 107 is completely attached to the measuring reference surface of the pump cover 215, the lower plane is tightly and light-tight, the state is kept for 3S, and the data are uploaded to a database for storage. Under the command of PLC, the electromagnetic valve is closed, the cylinder guide rod retracts, the distance measurement contact type sensor 206 is arranged, under the drive of the deflection double-diaphragm coupling 105, the distance measurement contact type sensor is far away from the measurement reference surface of the pump cover 215 and returns to the initial position, and at this point, the 1 st measuring point sp1And (5) finishing the measurement.
Under the command of PLC, the distance measurement rotary table 204 is started to drive the distance measurement air cylinder 205 to rotate by 90 degrees, 180 degrees and 270 degrees in sequence from the position of the 1 st measuring point, and the measuring point sp is repeatedly measured1And sequentially measuring sp2、sp3、sp4The measured values of the measuring points are recorded in a database, 4 measured values are averaged, and the calculation result is stored in the database and recorded as Sp. Under the command of PLC, the distance servo motor 202 drives the distance one-dimensional moving assembly 203 to drive the distance measuring rotary table 204 to enter a motor side test position and then stop, the pump measuring process is repeated, and 4 measuring points are measuredSm1、Sm2、Sm3、Sm4The measured values were averaged, recorded as Sm, and the measured values of 4 points and the calculated average were stored in a database.
In the measurement process of the contact type sensor, the system adopts a mode of adding a transition tool to reconstruct a measurement surface aiming at the condition of narrow measurement space of the sensor. During the measurement of pump chamber and oil bowl distance, mark the transition frock that increases in advance, the calibration value is marked as Np and Nm, through the transition frock, draws the measuring face of oil bowl, extends the contact sensor measuring face to the open space of being convenient for to measure and measures, and its measuring numerical value when carrying out data processing at the rear, adds the calibration size Np and Nm (Hp ═ Hp + Np, Hm ═ Hm + Nm) of transition frock respectively. When the distances Sp and Sm between the top surface of the rotor and the joint surface of the pump cover are measured, the added transition tool is calibrated in advance, the calibrated values are denoted as Cp and Cm, and when the contact sensor finishes measuring and processing data, Cp and Cm are respectively subtracted (Sp-Sp-Cp and Sm-Sm-Cm). According to the acquired values of Hp, Hm, SP and Sm, pump side and motor side gasket thicknesses tp and tm (C is a constant) can be calculated according to tp-SP + C and tm-Hm-Sm + C, and the assembling of the plunger pump is guided.

Claims (10)

1. An automatic measurement system, characterized by: comprises a parallelism measuring device, a conveying device and a distance measuring device; the parallelism measuring device and the distance measuring device are used for measuring a measured product, the conveying device is used for conveying the measured product and conveying the measured product to measuring stations of the parallelism measuring device and the distance measuring device;
the parallelism measuring device comprises a parallelism measuring support (101), a parallelism rotary table (102), a parallelism air cylinder (103) and a parallelism contact type sensor (104); the parallelism rotary table (102) is arranged on the parallelism measuring support (101), a cylinder body of the parallelism cylinder (103) is arranged at the output end of the parallelism rotary table (102), and the parallelism contact sensor (104) is arranged on a sensor support (107) connected with a guide rod of the parallelism cylinder (103);
the distance measuring device comprises a distance measuring support (201), a distance servo motor (202), a distance one-dimensional moving assembly (203), a distance measuring rotary table (204), a distance measuring cylinder (205) and a distance measuring contact type sensor (206); the distance servo motor (202) and the distance one-dimensional moving assembly (203) are arranged on the distance measuring support (201), the distance measuring rotary table (204) is arranged on the distance one-dimensional moving assembly (203), and the distance one-dimensional moving assembly (203) drives the distance measuring rotary table (204) to move linearly under the driving of the distance servo motor (202); the cylinder body of the distance measuring cylinder (205) is arranged at the output end of the distance measuring rotary table (204), and the distance measuring contact type sensor (206) is arranged on a sensor bracket (107) connected with a guide rod of the distance measuring cylinder (205).
2. The automatic measurement system of claim 1, wherein: the parallelism contact sensor (104) is arranged on a sensor support (107) connected with a guide rod of the parallelism cylinder (103) through a double-diaphragm coupling (105) with deflection, and the distance measurement contact sensor (206) is arranged on the sensor support (107) connected with the guide rod of the distance measurement cylinder (205) through the double-diaphragm coupling (105) with deflection.
3. The automatic measurement system of claim 2, wherein: the distance measuring device further comprises a turntable connecting plate (207) and a turntable guide rail (208); the distance measurement device is characterized in that the turntable guide rail (208) is arranged on the distance measurement support (201), the distance measurement turntable (204) is arranged on the turntable connecting plate (207), one end of the turntable connecting plate (207) is connected with the output of the distance one-dimensional moving assembly (203), and the other end of the turntable connecting plate is arranged on the turntable guide rail (208) and can slide on the turntable guide rail (208).
4. The automatic measurement system according to claim 1, 2 or 3, characterized in that: the conveying device comprises a tooling plate (301), a tray (302) and a double-speed chain (304); the measured products are arranged on the tray (302), the tray (302) is arranged on the tooling plate (301), and the tooling plate (301) drives the measured products on the tray (302) to enter a measuring station under the conveying of the speed doubling chain (304).
5. The automatic measurement system of claim 4, wherein: the conveying device further comprises a conveying one-dimensional moving assembly (303), the conveying one-dimensional moving assembly (303) is installed on the tooling plate (301), the tray (302) is arranged on the conveying one-dimensional moving assembly (303), and the conveying one-dimensional moving assembly (303) drives a measured product on the tray (302) to achieve position adjustment.
6. The automatic measurement system of claim 5, wherein: the parallelism air cylinder (103) is arranged at the output end of the parallelism rotary table (102) through an air cylinder connecting plate (106).
7. The automatic measurement system of claim 6, wherein: the distance measuring cylinder (205) is installed at the output end of the distance measuring rotary table (204) through a cylinder connecting plate (106).
8. The automatic measurement system of claim 7, wherein: the parallelism cylinder (103) and the distance measuring cylinder (205) adopt a thin-type belt guide rod cylinder.
9. A method for measuring a plunger pump based on the automatic measuring system of any one of claims 1 to 8, comprising the steps of:
firstly, moving a plunger pump to a measuring station of a parallelism measuring device;
secondly, measuring the parallelism of the adjustable swash plate by a parallelism measuring device;
2.1) the parallelism cylinder drives the parallelism contact sensor to move downwards, a measuring head of the parallelism contact sensor contacts the adjustable swash plate, the parallelism contact sensor starts to read after being compressed, and the distance L between the upper plane of the pump cavity and the adjustable swash plate is obtained by taking the upper plane of the pump cavity as a reference plane1After reading, the parallelism contact sensor returns to the initial positionA location;
2.2) the parallelism rotary table drives the parallelism contact sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 2.1) is repeated to respectively obtain a measurement value L2、L3、L4；
2.3) calculating Q1-3、Q2-4，Q1-3＝|L1-L3|，Q2-4＝|L2-L4If Q1-3、Q2-4If the required value is met, the parallelism of the adjustable swash plate is qualified, the next step is executed, and if the parallelism of the adjustable swash plate is not met, the adjustable swash plate is returned to be processed;
moving the plunger pump to a measuring station of the distance measuring device;
measuring the distance between the pump cavity and the oil bowl by using a distance measuring device;
4.1) sleeving a first transition tool on a transmission shaft at the pump side of the plunger pump, wherein the first transition tool is positioned above the oil bowl;
4.2) moving the distance one-dimensional moving assembly to move the distance measurement contact sensor to a measurement position, driving the distance measurement contact sensor to move downwards by the distance measurement cylinder, enabling a measuring head of the distance measurement contact sensor to contact with the upper surface of the first transition tool, starting reading by the distance measurement contact sensor after compression, and obtaining the distance hp between the upper plane of the pump cavity and the upper surface of the first transition tool by taking the upper plane of the pump cavity as a reference plane1After the reading is finished, the distance measurement contact sensor returns to the initial position;
4.3) the distance measuring turntable drives the distance measuring contact type sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 4.2) is repeated to respectively obtain the measured value hp2、hp3、hp4；
4.4) reaction of hp1、hp2、hp3、hp4Summing the axial length NP of the first transition tool to obtain the distance Hp between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hp2、Hp3、Hp4And for Hp1、Hp2、Hp3、Hp4Calculating the average valueHp, recording the measured value Hp of the pump side of the plunger pump in the batch;
4.5) sleeving a second transition tool on the transmission shaft at the side of the plunger pump motor, positioning the second transition tool above the oil bowl, and repeating the steps 4.2) to 4.4) to obtain the distance Hm between the upper surface of the oil bowl and the upper plane of the pump cavity1、Hm2、Hm3、Hm4And to Hm1、Hm2、Hm3、Hm4Calculating an average value Hm, and recording the average value Hm as a measured value Hm of the motor side of the plunger pump of the batch;
step five, measuring the distance between the top surface of the rotor and the joint surface of the pump cover by using a distance measuring device;
5.1) arranging a third transition tool on the rotor at the pump side of the plunger pump, wherein the third transition tool is positioned above the rotor, and the distance between the upper surface of the third transition tool and the top surface of the rotor is Cp;
5.2) moving the distance one-dimensional moving assembly to move the distance measurement contact sensor to a measurement position, driving the distance measurement contact sensor to move downwards by the distance measurement cylinder, enabling a measuring head of the distance measurement contact sensor to contact the upper surface of the third transition tool, starting reading of the distance measurement contact sensor after compression, and obtaining the distance sp between the pump cover joint surface and the upper surface of the third transition tool by taking the pump cover joint surface as a reference surface1After the reading is finished, the distance measurement contact sensor returns to the initial position;
5.3) the distance measuring turntable drives the distance measuring contact type sensor to rotate clockwise by 90 degrees, 180 degrees and 270 degrees in sequence, and the process of the step 5.2) is repeated to respectively obtain a measured value sp2、sp3、sp4；
5.4) mixing of sp1、sp2、sp3、sp4Calculating the difference with Cp to obtain the distance Sp between the top surface of the rotor and the joint surface of the pump cover1、Sp2、Sp3、Sp4And to Sp1、Sp2、Sp3、Sp4Calculating an average value Sp, and recording the average value Sp as a pump side measured value Sp of the plunger pump of the batch;
5.5) sleeving a fourth transition tool on the rotor at the motor side of the plunger pump, wherein the fourth transition tool is positioned on the rotorThe distance between the upper surface of the fourth transition tool and the top surface of the rotor is Cm above the rotor; repeating the steps 5.2) to 5.4) to obtain the distance Sm between the top surface of the rotor and the joint surface of the pump cover1、Sm2、Sm3、Sm4And to Sm1、Sm2、Sm3、Sm4And calculating an average value Sm and recording the average value Sm as a measured value Sm of the plunger pump motor of the batch.
10. The plunger pump measuring method according to claim 9, characterized in that: between the first step and the second step, the method also comprises the step of calibrating the parallelism contact sensor and the distance measurement contact sensor: a) selecting standard gauge blocks with the same height as the measured distance; b) respectively measuring by adopting manual and contact sensors, and constructing a linear relation of measured values; c) and (5) importing the linear relation into a control system, and completing calibration.
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