CN110864031B

CN110864031B - Detection system for overcoming hydraulic oil temperature rise in hydraulic detection process

Info

Publication number: CN110864031B
Application number: CN201911095163.1A
Authority: CN
Inventors: 黄勇
Original assignee: Jinan Huakaiwei Hydraulic Technology Co ltd
Current assignee: Jinan Huakaiwei Hydraulic Technology Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2021-08-03
Anticipated expiration: 2039-11-11
Also published as: CN110864031A

Abstract

The invention discloses a detection system for overcoming the temperature rise of hydraulic oil in a hydraulic detection process, which belongs to the technical field of hydraulic detection equipment. The invention has the effect of reducing the temperature rise of the hydraulic oil so as to improve the detection precision.

Description

Detection system for overcoming hydraulic oil temperature rise in hydraulic detection process

Technical Field

The invention relates to the technical field of hydraulic detection equipment, in particular to a detection system for overcoming the temperature rise of hydraulic oil in a hydraulic detection process.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The reciprocating motion device has simple structure and reliable work, can avoid a speed reducer when the reciprocating motion is realized, has no transmission clearance, and moves stably, thereby being widely applied to hydraulic systems of various machines. When leaving the factory, the hydraulic cylinder needs to be subjected to oil passing performance detection, namely, the hydraulic cylinder is installed on test equipment, so that the hydraulic cylinder simulates the actual working condition and detects whether the hydraulic cylinder can normally work or not. The hydraulic pressure temperature needs to be controlled in the hydraulic pressure detection, because when the temperature of the hydraulic oil rises, the viscosity of the hydraulic oil will drop, and therefore the test effect is distorted.

At present, chinese patent publication No. CN105952713A discloses a hydraulic cylinder test system and a test method, including: the system comprises an oil supply system, a loading system and a measurement and control system; the oil supply system includes: the system comprises a starting control unit, a driving motor, a proportional variable pump, a three-position four-way reversing valve and a hydraulic cylinder; the loading system comprises: the device comprises a power supply module, an alternating current motor, a quantitative motor and a loading hydraulic cylinder; the measurement and control system comprises a control cabinet and a force transducer; and a piston rod of the loading hydraulic cylinder is connected with a piston rod of the hydraulic cylinder in a butting way through a connector. The speed of the double-acting single-stage hydraulic cylinder or the multi-stage hydraulic cylinder is adjusted by the proportional variable pump, and the loading and pressure control of the hydraulic cylinder are realized by adopting a mode that the quantitative motor drives the alternating current motor. In the test process, the kinetic energy of the tested hydraulic cylinder drives the loading hydraulic cylinder to be converted into hydraulic energy, and then the hydraulic energy is converted into electric energy through the quantitative motor and the alternating current motor, so that the non-throttling loading and energy recovery are realized, the energy consumption of the system is reduced, and the temperature rise of oil is reduced.

Although the problem of partial temperature rise is solved in the above technical scheme, the hydraulic pressure source in the system still comes from the hydraulic pump, and long-time detection makes the long-time work of hydraulic pump to lead to the temperature rise of hydraulic pump, thereby the heat transfer leads to the temperature rise of hydraulic oil, and then influences the detection accuracy of whole detecting system.

Disclosure of Invention

The invention aims to provide a detection system for overcoming the temperature rise of hydraulic oil in a hydraulic detection process, and the purpose of improving the detection precision is achieved by reducing the temperature rise of the hydraulic oil.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an overcome detecting system of hydraulic oil temperature rise among hydraulic pressure testing process, is including the mounting bracket that is used for the installation to be surveyed the hydraulic cylinder, for being surveyed the hydraulic cylinder provide hydraulic pressure's oil supply unit and the measurement and control device who detects hydraulic cylinder output pressure, oil supply unit includes the flexible drive structure of single acting piston cylinder and push piston cylinder, the no pole chamber of single acting piston cylinder and the oil inlet intercommunication of being surveyed the hydraulic cylinder, the no pole intracavity of single acting piston cylinder is full of hydraulic oil, mounting bracket and being surveyed hydraulic cylinder body fixed connection, measurement and control device's sense terminal is contradicted in the piston rod end face of being surveyed the hydraulic cylinder.

Through adopting above-mentioned technical scheme, the shrink of drive structure drive single-action piston cylinder to press into in the measured hydraulic cylinder with its no pole intracavity hydraulic oil, provide pressure for the detection of pneumatic cylinder. The tested hydraulic cylinder stretches and contracts to apply thrust to the measurement and control device, and the measurement and control device detects whether the pressure applied by the hydraulic cylinder meets the requirements or not. The pressure source of the technical scheme is from the contraction of the single-action piston cylinder driven by the driving structure. Under the condition of providing the same pressure and the same flow of hydraulic oil, compared with a hydraulic pump, the heat generated by the single-action piston cylinder is lower, and the temperature rise of the single-action piston cylinder is smaller. Meanwhile, the driving structure is not directly contacted with hydraulic oil, so that the oil temperature is effectively prevented from rising when the heat of the power structure is transferred through heat. Through reducing the temperature rise of hydraulic oil among the detecting system, detecting system's precision has been promoted.

The invention is further configured to: the oil supply device further comprises an oil storage tank, an oil delivery pipe is communicated with the bottom of the oil storage tank, the oil delivery pipe is communicated with a cavity in the cylinder body of the single-action piston cylinder, and when the single-action piston cylinder extends to the maximum stroke, the oil delivery pipe is communicated with a rodless cavity of the single-action piston cylinder.

By adopting the technical scheme, when the single-action piston cylinder extends to the maximum stroke, the hydraulic oil in the oil storage tank enters the rodless cavity of the single-action piston cylinder, and the oil storage tank is utilized to provide the hydraulic oil for the single-action piston cylinder. When the heat generated in the detection system is the same, more hydraulic oil can reduce the heat absorbed per liter, so that the temperature rise of the hydraulic oil in the detection system can also be reduced.

The invention is further configured to: the oil supply device further comprises a two-position five-way valve, the rodless cavity of the single-action piston cylinder is communicated with the oil inlet of the tested hydraulic cylinder through the two-position five-way valve, the bottom of the cylinder body of the single-action piston cylinder is communicated with the oil inlet of the two-position five-way valve, two oil outlets of the two-position five-way valve are communicated with two oil inlets of the tested hydraulic cylinder respectively, and two oil outlets of the two-position five-way valve are communicated with the oil storage tank.

By adopting the technical scheme, the tested hydraulic cylinder is controlled by the two-position five-way valve, so that the one-way circulation of the hydraulic oil is realized, and all the hydraulic oil participates in the detection.

The invention is further configured to: the mounting bracket includes base and vertical fixed connection in the support body of base, the dead lever that support body upper end threaded connection level set up, the one end fixed connection in the disc of support body is kept away from to the dead lever, fixedly connected with is used for the fixed staple bolt of being surveyed the piston cylinder body on the support body, measurement and control device fixed connection is on the base and be located the staple bolt under.

Through adopting above-mentioned technical scheme, pass the collar of being surveyed the hydraulic cylinder body and threaded connection on the link with the dead lever to will be surveyed the hydraulic cylinder hoist and mount in the link. The cylinder body of the tested hydraulic cylinder is fixed by the anchor ear, so that the influence on the detection result caused by deflection of the tested hydraulic cylinder during detection is avoided.

The invention is further configured to: measurement and control device has the magnetic force jar and the link of vertical sliding connection in the magnetic pole of horizontal magnetic field including inside, link fixedly connected with wire, wire both ends electricity is connected with the battery, when the mounting bracket is vertical to slide the magnetic induction line in the magnetic field of wire cutting magnetic force jar, the link contradicts in the one end of being surveyed the hydraulic cylinder piston rod, the wire electricity is connected with the current sensor who detects the wire electric current.

By adopting the technical scheme, the storage battery is used for supplying power to the lead to enable the lead to generate current inside, the lead positioned in the magnetic field can generate ampere force, the ampere force is used for balancing the thrust of the tested hydraulic cylinder, the hydraulic cylinder can keep stretching at a constant speed, and the current sensor is used for detecting the current of the lead, so that the pressure generated by the hydraulic cylinder is detected. Because the electrified lead overcomes the ampere force in the magnetic field and slides, the direction of the induced current is the same as the current direction, the current in the lead is increased, the temperature of the lead is increased, the hydraulic energy is converted into the internal energy of the lead, the internal energy converted into the hydraulic oil is reduced, and the temperature rise of the hydraulic oil is slowed down.

The invention is further configured to: the measurement and control device further comprises a shell, the magnetic force tank is rotatably connected into the shell, an included angle between the lead and the horizontal plane is 5-85 degrees, and the magnetic field direction of the magnetic field in the magnetic force tank is horizontally arranged.

Through adopting above-mentioned technical scheme, magnetic force jar rotation direction and slew velocity to can control the speed of wire cutting magnetic induction line, and then can control the size of ampere force. The storage battery can not convey current to the inside of the electric conduction, the ampere force of the induced current generated by cutting the magnetic induction line by the lead is only utilized to overcome the thrust of the tested hydraulic cylinder, and the generated induced current can be stored in the conveying device, so that the energy consumption during detection is saved.

The invention is further configured to: the magnetic force tank comprises an inner magnetic ring and an outer magnetic ring which are coaxially arranged, the magnetic poles of the inner magnetic ring and the outer magnetic ring are uniformly arranged on the inner wall and the outer wall, the magnetic pole on the inner wall side of the outer magnetic ring and the magnetic pole on the outer wall side of the inner magnetic ring are heteropolar, the lead is spirally and coaxially arranged between the inner magnetic ring and the outer magnetic ring, and two ends of the lead respectively extend out of the connecting end of the magnetic force tank and are electrically connected with two ends of the storage battery.

Through adopting above-mentioned technical scheme, utilize interior magnetic ring and outer magnetic ring to make the magnetic field of magnetic force jar be the annular, and the wire that the spiral set up makes the wire cut magnetic induction line in as the magnetic force jar rotates in the annular magnetic field. Because the magnetic field is annular, when it rotates, the magnetic field direction of the magnetic field remains unchanged, thereby the direction of the conducting wire and the magnetic induction wire is always kept consistent, and more stable ampere force can be provided.

The invention is further configured to: the conducting wires are arranged in parallel, and the conducting wires are coaxially led to the threads.

Through adopting above-mentioned technical scheme, utilize a plurality of wires to cut the magnetic induction line, reduce the electric current in the single wire to reduce the heat energy that the wire produced, made more electric energy be stored by the battery.

The invention is further configured to: the measurement and control device further comprises a shell, the connecting frame comprises a connecting shaft which is vertically and slidably connected to the shell, the upper end of the connecting shaft extends out of the shell and abuts against the end face of the piston rod of the measured hydraulic cylinder, the connecting shaft is located on a connecting ring which is fixedly connected with one end of the shell, the connecting ring is coaxially arranged between the inner magnetic ring and the outer magnetic ring, and the wire is wound on the connecting ring.

By adopting the technical scheme, the lead is wound on the connecting ring, so that the lead is subjected to ampere force and is transmitted to the connecting shaft through the connecting ring, and then is transmitted to the tested hydraulic cylinder through the connecting shaft.

The invention is further configured to: the connecting shaft is an external spline shaft, and the shell is provided with an internal spline notch which is in clearance fit with the spline.

Through adopting above-mentioned technical scheme, because the contained angle of wire and magnetic induction line is 5 ~85 to lead to ampere force can produce a radial torsional force, through adopting above-mentioned technical scheme, utilize the cooperation of external spline axle and internal spline notch, prevent that above-mentioned torsional force from transmitting to being surveyed hydraulic cylinder department, reduce the influence of torsional force to the test result.

In conclusion, the invention has the following beneficial effects:

first, the pressure source is from the shrink of drive structure drive single action piston cylinder, provides the same pressure and the same flow hydraulic oil's the condition, compares the hydraulic pump, and the heat that the single action piston cylinder produced meets the end, and self temperature rise is also less. Meanwhile, the driving structure is not directly contacted with hydraulic oil, so that the oil temperature is effectively prevented from rising when the heat of the power structure is transferred through heat. The temperature rise of hydraulic oil in the detection system is reduced, so that the precision of the detection system is improved;

when pressure is detected, the detected hydraulic cylinder can push the lead to cut the magnetic induction line, so that hydraulic energy is converted into internal energy or electric energy of the lead, the internal energy of the hydraulic energy converted into hydraulic oil is reduced, and the temperature rise of the hydraulic oil is slowed down;

thirdly, the magnetic field of the magnetic force tank is annular by utilizing the inner magnetic ring and the outer magnetic ring, and the conducting wire arranged in a spiral mode is arranged in the annular magnetic field, so that the conducting wire cuts the magnetic induction wire when the magnetic force tank rotates. Because the magnetic field is annular, when it rotates, the magnetic field direction of the magnetic field remains unchanged, thereby the direction of the conducting wire and the magnetic induction wire is always kept consistent, and more stable ampere force can be provided.

Drawings

FIG. 1 is a hydraulic schematic diagram of embodiment 1;

FIG. 2 is a schematic view showing the structure of the oil supply apparatus according to embodiment 1;

fig. 3 is a cross-sectional view of the embodiment 1 for showing a single-acting piston cylinder;

FIG. 4 is a schematic structural view for showing a mount according to embodiment 1;

FIG. 5 is a sectional view showing a measurement and control device according to embodiment 1;

fig. 6 is a cross-sectional view of the measurement and control device in embodiment 2.

Reference numerals: 100. an oil supply device; 101. an oil storage tank; 102. a single-acting piston cylinder; 103. a drive structure; 104. an oil delivery pipe; 105. a two-position five-way valve; 106. a pressure sensor; 107. an on-off valve; 200. a measurement and control device; 201. a housing; 202. a magnetic force tank; 203. an inner magnetic ring; 204. an outer magnetic ring; 205. a connecting frame; 206. a connecting shaft; 207. fixing the ear; 208. a connecting pin; 209. a connecting ring; 210. a wire; 211. a first drive motor; 212. a second drive motor; 213. a drive gear; 214. a ring gear; 217. an internal spline notch; 300. a mounting frame; 301. a base; 302. a frame body; 303. hooping; 304. fixing the rod; 305. a disc; 400. and (5) a tested hydraulic cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a detection system for overcoming the temperature rise of hydraulic oil in a hydraulic detection process is shown in figure 1, and comprises an oil supply device 100 and a measurement and control device 200. The oil supply device 100 supplies the hydraulic oil to the hydraulic cylinder 400 to be measured. The piston rod of the tested hydraulic cylinder 400 abuts against the detection end of the measurement and control device 200, and when the tested hydraulic cylinder 400 is driven by hydraulic oil pressure to stretch, thrust or pulling force can be applied to the measurement and control device 200, so that the thrust generated by the tested hydraulic cylinder 400 at the moment is detected.

As shown in fig. 1, the oil supply device 100 includes an oil reservoir 101 for storing oil, a single-acting piston cylinder 102, and a drive structure 103 that drives the single-acting piston cylinder 102 to extend and retract.

As shown in fig. 2 and 3, the single-acting piston cylinder 102 is horizontally disposed. An oil outlet is formed in the side wall, far away from the end face of the piston rod, of the rodless cavity of the single-acting piston cylinder 102, the side wall of the cylinder body of the single-acting piston cylinder 102 is communicated with an oil conveying pipe 104, and when the single-acting piston cylinder 102 stretches to the maximum stroke, the oil conveying pipe 104 is communicated with the rodless cavity of the single-acting piston cylinder 102. The other end of the oil delivery pipe 104 is communicated with the bottom of the oil storage tank 101, and the delivery pipe 104 is provided with a switch valve 107. The horizontal height of the lowest end of the oil reservoir 101 is greater than the height of the uppermost end of the hydraulic cylinder, so that when the single-acting piston cylinder 102 is extended to the maximum stroke, the hydraulic oil in the oil reservoir 101 enters the rodless chamber of the single-acting piston cylinder 102. The single-acting piston cylinder 102 is then contracted by the drive structure 103, thereby squeezing the hydraulic oil, causing it to be squeezed out of the oil outlet and into the hydraulic cylinder 400 under test.

The pressure source for the tested hydraulic cylinder 400 is the contraction from the drive structure 103 driving the single acting piston cylinder 102. When the same pressure and the same flow rate of hydraulic oil are supplied, the single-acting piston cylinder 102 generates a lower amount of heat when it extends and contracts and a lower temperature rise than a hydraulic pump. Meanwhile, the driving structure 103 is not directly contacted with hydraulic oil, so that the oil temperature is effectively prevented from rising when the heat of the power structure is transferred through heat. Through reducing the temperature rise of hydraulic oil among the detecting system, detecting system's precision has been promoted.

As shown in fig. 1, the single-acting piston cylinder 102 and the hydraulic cylinder 400 to be tested are connected by providing the two-position five-way valve 105, and the extension and retraction of the hydraulic cylinder 400 to be tested can be controlled by controlling the two-position five-way valve 105. The oil outlet of the single-acting piston cylinder 102 is communicated with the oil inlet of the two-position five-way valve 105, the two oil outlets of the two-position five-way valve 105 are respectively communicated with the two oil inlets of the tested hydraulic cylinder 400, and the two oil outlets of the two-position five-way valve 105 are both communicated with the oil storage tank 101. Two oil outlets of the two-position five-way valve 105 are both communicated with pressure sensors for detecting pressure. The pressure of the hydraulic oil entering the hydraulic cylinder 400 to be measured is measured by the pressure sensor 106. The two-position five-way valve 105 is preferably a two-position five-way electromagnetic valve, and is convenient to use and simple to operate.

As shown in fig. 2, the driving structure 103 is preferably an electric push rod, the extension and contraction direction of the electric push rod is the same as the extension and contraction direction of the single-acting piston cylinder 102, so that the push rod of the electric push rod is coaxially and fixedly connected with the piston rod of the single-acting piston cylinder 102, and the extension and contraction of the single-acting piston cylinder 102 are driven by the electric push rod. The drive structure 103 may be another hydraulic cylinder, but if a hydraulic cylinder is used as the drive structure 103, the hydraulic oil of the hydraulic cylinder is not shared with the hydraulic oil for testing. The power source of the hydraulic cylinder also needs to adopt an independent hydraulic pump.

As shown in fig. 3, in order to avoid the deflection of the tested hydraulic cylinder 400 during the testing process to affect the testing result, the testing system further includes a mounting bracket 300 for fixing the tested hydraulic cylinder 400.

As shown in fig. 3, the mounting frame 300 includes a base 301, and the base 301 is fixedly connected to a frame body 302 arranged vertically. The upper end of the frame body 302 is screwed with a horizontally arranged fixing rod 304, and one end of the fixing rod 304 far away from the frame body 302 is fixedly connected with the disc 305. The fixing rod 304 penetrates through the mounting ring of the cylinder body of the tested hydraulic cylinder 400 and is screwed to the frame body 302, so that the tested hydraulic cylinder 400 is hung on the connecting frame 205, the tested hydraulic cylinder 400 is blocked by the disc 305, and the tested hydraulic cylinder 400 is prevented from sliding off the fixing rod 304.

As shown in fig. 3, the frame 302 is fixedly connected with an anchor ear 303, the anchor ear 303 is coaxially sleeved on the cylinder body of the tested hydraulic cylinder 400, and the anchor ear 303 and the cylinder body are connected in a sliding manner. The hoop 303 is used for limiting the radial position of the cylinder body of the tested hydraulic cylinder 400, so that the influence on the detection result caused by the deflection of the tested hydraulic cylinder 400 during detection is avoided.

As shown in fig. 3, the measurement and control device 200 is fixedly connected to the base 301 and located right below the hoop 303.

As shown in fig. 4, the measurement and control device 200 includes a casing 201 fixedly connected to a base 301, a magnetic tank 202 is fixedly connected to the inside of the casing 201, the magnetic tank 202 includes an inner magnetic ring 203 and an outer magnetic ring 204 coaxially disposed, the magnetic poles of the inner and outer magnetic rings 204 are located at the inner wall and the outer wall, the magnetic pole at the inner wall side of the outer magnetic ring 204 is the S pole, and the magnetic pole at the outer wall side of the inner magnetic ring 203 is the N pole, so that an annular magnetic field is provided in the magnetic tank 202, and the magnetic field direction is horizontally disposed.

As shown in fig. 4, the housing 201 is vertically slidably connected with a connection frame 205, and the connection frame 205 includes a connection shaft 206 vertically slidably connected with the housing 201. The connecting shaft 206 is a detection end of the measurement and control device 200, and the upper end of the connecting shaft 206 extends out of the casing 201. The upper end of the connecting shaft 206 is fixedly connected with two fixing lugs 207, a connecting pin 208 is arranged in the fixing lugs 207 in a penetrating manner, the mounting ring of the piston rod of the hydraulic cylinder 400 to be tested is arranged between the two fixing lugs 207, and then the connecting pin 208 is arranged in the mounting ring of the piston rod of the hydraulic cylinder in a penetrating manner, so that the connecting shaft 206 is fixedly connected with the cylinder body of the hydraulic cylinder 400 to be tested.

As shown in fig. 4, one end of the connecting shaft 206 located inside the housing 201 is coaxially and fixedly connected with a connecting ring 209, the connecting ring 209 is coaxially arranged between the inner magnetic ring 203 and the outer magnetic ring 204, and the connecting ring 209 is spirally wound with a conducting wire 210. The spiral direction of the conducting wire 210 is clockwise spiral downward, and the included angle between the conducting wire 210 and the horizontal plane is 5-85 degrees. Both ends of the lead wire 210 extend from the connection ends of the magnet pot 202, respectively, and are electrically connected to the battery. The upper end of the wire 210 is electrically connected to the positive electrode of the battery, and the lower end of the wire 210 is electrically connected to the negative electrode of the battery. When power is applied to the wire 210, the wire 210 experiences an upward ampere force. The ampere force is used for balancing the thrust of the tested hydraulic cylinder 400, so that the tested hydraulic cylinder 400 can keep stretching at a constant speed.

As shown in fig. 4, a current sensor for detecting a current of the lead 210 is electrically connected to the lead 210, and the magnitude of the current of the lead 210 is detected by the current sensor, thereby detecting the magnitude of the pressure generated by the hydraulic cylinder.

The specific working mode of this embodiment: the qualified calibration hydraulic cylinder is mounted on the mounting frame 300, and the piston rod of the standard hydraulic cylinder is connected with the connecting shaft 206. The hydraulic cylinder is calibrated to measure the hydraulic pressure, and the thrust generated by the hydraulic cylinder is known. And starting the single-acting piston cylinder 102 to enable the pressure displayed by the pressure sensor to be equal to the measured hydraulic pressure, supplying power to the lead 210 by using the storage battery to enable the hydraulic cylinder to stretch at a constant speed, and then recording the current of the lead 210 detected by the current sensor at the moment, wherein the current at the moment is the calibration current. The measured hydraulic cylinder 400 is then mounted on the mounting bracket 300, and the above operation is repeated to compare the detected current with the calibration current. And when the detection current is equal to or larger than the calibration current, the product is qualified.

Example (b): a detection system for overcoming the temperature rise of hydraulic oil in a hydraulic detection process is shown in fig. 6, wherein the lower ends of wires 210 are respectively and electrically connected with the anode of a diode, the lower ends of the wires 210 are electrically connected with the anode of the diode, and the cathode of the diode is electrically connected with the anode of a storage battery. The upper end of the lead 210 is electrically connected to the negative electrode of the battery.

As shown in fig. 6, the magnet pot 202 is rotatably connected in the housing 201, and the inner magnetic ring 203 and the outer magnetic ring 204 are both rotatably connected in the housing 201. The lower end of the base 301 is fixedly connected with a first driving motor 211, a main shaft of the first driving motor 211 is coaxially and fixedly connected with the inner magnetic ring 203, and the first driving motor 211 is used for driving the inner magnetic ring 203 to rotate. A second driving motor 212 for driving the outer magnetic ring 204 to rotate is fixedly connected to the lower end of the base 301. The main shaft of the second driving motor 212 penetrates through the base 301 and extends into the shell 201, the upper end of the main shaft of the second driving motor 212 is coaxially and fixedly connected with a driving gear 213, and the outer wall of the outer magnetic ring 204 is coaxially and fixedly connected with a gear ring 214 meshed with the driving gear 213. The inner magnetic ring 203 and the outer magnetic ring 204 are driven by the first driving motor 211 and the second driving motor 212 to rotate at the same angular velocity, so that the rotation of the magnetic field of the magnetic force tank 202 is realized.

As shown in fig. 6, the magnet pot 202 rotates counterclockwise at the first driving motor 211 and the second driving motor 212, so that the conductive wire 210 cuts the magnetic induction wire. The wire 210 cuts the magnetic induction line to generate an induced current, and the induced current generates an ampere force in the magnetic field, and the ampere force overcomes the thrust of the hydraulic cylinder 400 to be measured. The direction and speed of rotation of the magnetic canister 202 is controlled so that the speed at which the wire 210 cuts the magnetically induced wire, and thus the magnitude of the ampere force, can be controlled.

As shown in fig. 6, the storage battery can no longer transmit current to the inside of the electric conductor, only the ampere force of the induced current generated by cutting the magnetic induction wire by the lead 210 overcomes the thrust of the hydraulic cylinder 400 to be detected, and the generated induced current can also be stored in the transmission device, so that the energy consumption during detection is saved.

As shown in fig. 6, because the included angle between the wire and the magnetic induction line is 5 ° -85, the ampere force generates a radial torsion force, and in order to avoid the influence of the torsion force on the hydraulic cylinder 400 to be tested, the connecting shaft adopts an external spline shaft, and the housing is provided with an internal spline notch 217 which is in clearance fit with the spline. The external spline shaft and the internal spline notch 217 are matched to prevent the torsional force from being transmitted to the tested hydraulic cylinder 400, so that the influence of the torsional force on the test result is reduced.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a overcome detecting system of hydraulic oil temperature rise among hydraulic pressure testing process which characterized in that: the hydraulic cylinder testing device comprises a mounting frame (300) used for mounting a tested hydraulic cylinder (400), an oil supply device (100) used for providing hydraulic pressure for the tested hydraulic cylinder (400) and a measurement and control device (200) used for detecting the output pressure of the hydraulic cylinder, wherein the oil supply device (100) comprises a single-acting piston cylinder (102) and a driving structure (103) used for pushing the piston cylinder to stretch, a rodless cavity of the single-acting piston cylinder (102) is communicated with an oil inlet of the tested hydraulic cylinder (400), a rodless cavity of the single-acting piston cylinder (102) is filled with hydraulic oil, the mounting frame (300) is fixedly connected with a cylinder body of the tested hydraulic cylinder (400), and a detection end of the measurement and control device (200) abuts against the end face of a piston rod of the tested hydraulic cylinder (400); the oil supply device (100) further comprises an oil storage tank (101), an oil delivery pipe (104) is communicated with the bottom of the oil storage tank (101), the oil delivery pipe (104) is communicated with a cavity in the cylinder body of the single-acting piston cylinder (102), and when the single-acting piston cylinder (102) extends to the maximum stroke, the oil delivery pipe (104) is communicated with a rodless cavity of the single-acting piston cylinder (102); the oil supply device (100) further comprises a two-position five-way valve (105), a rodless cavity of the single-action piston cylinder (102) is communicated with an oil inlet of the tested hydraulic cylinder (400) through the two-position five-way valve (105), the bottom of a cylinder body of the single-action piston cylinder (102) is communicated with the oil inlet of the two-position five-way valve (105), two oil outlets of the two-position five-way valve (105) are respectively communicated with two oil inlets of the tested hydraulic cylinder (400), and two oil discharge ports of the two-position five-way valve (105) are communicated with the oil storage tank (101); the mounting frame (300) comprises a base (301) and a frame body (302) vertically and fixedly connected to the base (301), the upper end of the frame body (302) is in threaded connection with a horizontally arranged fixing rod (304), one end, far away from the frame body (302), of the fixing rod (304) is fixedly connected to a disc (305), the frame body (302) is fixedly connected with a hoop (303) used for fixing a cylinder body of a piston cylinder to be tested, and the measurement and control device (200) is fixedly connected to the base (301) and is located right below the hoop (303); measurement and control device (200) have magnetic force jar (202) and vertical sliding connection in link (205) of magnetic pole of horizontal magnetic field including inside, link (205) fixedly connected with wire (210), wire (210) both ends electricity is connected with the battery, when mounting bracket (300) vertically slides wire (210) cut the magnetic induction line in the magnetic field of magnetic force jar (202), link (205) are contradicted in the one end by measuring hydraulic cylinder (400) piston rod, wire (210) electricity is connected with the current sensor who detects wire (210) electric current.

2. The detection system for overcoming the hydraulic oil temperature rise in the hydraulic pressure detection process according to claim 1, wherein: the measurement and control device (200) further comprises a shell (201), the magnetic force tank (202) is rotatably connected into the shell (201), an included angle between the lead (210) and the horizontal plane is 5-85 degrees, and the magnetic field direction of the magnetic field in the magnetic force tank (202) is horizontally arranged.

3. The detection system for overcoming the hydraulic oil temperature rise in the hydraulic pressure detection process according to claim 2, wherein: the magnetic force jar (202) is including being interior magnetic ring (203) and outer magnetic ring (204) of coaxial setting, and the inner wall and the outer wall of interior magnetic ring (203) and outer magnetic ring (204) all are provided with the magnetic pole, the magnetic pole of outer magnetic ring (204) inner wall side and the magnetic pole of interior magnetic ring (203) outer wall side are heteropolar, wire (210) are the spiral and coaxial setting between interior magnetic ring (203) and outer magnetic ring (204), the both ends of wire (210) are extended and are connected with the battery both ends electricity from the even end of magnetic force jar (202) respectively.

4. The detection system for overcoming the hydraulic oil temperature rise in the hydraulic pressure detection process according to claim 3, wherein: the conducting wires (210) are arranged in parallel, and the conducting wires (210) are coaxially arranged to lead to the thread.

5. The detection system for overcoming the hydraulic oil temperature rise in the hydraulic pressure detection process according to claim 4, wherein: measurement and control device (200) still include shell (201), link (205) include vertical sliding connection in connecting axle (206) of shell (201), extend shell (201) and contradict in the piston rod terminal surface of being surveyed hydraulic cylinder (400) connecting axle (206) upper end, connecting axle (206) are located the coaxial fixedly connected with go-between (209) of one end of shell (201), go-between (209) coaxial setting in inside, between outer magnetic ring (203, 204), wire (210) twine in go-between (209).

6. The detection system for overcoming the hydraulic oil temperature rise in the hydraulic pressure detection process according to claim 5, wherein: the connecting shaft (206) is an external spline shaft, and the shell (201) is provided with an internal spline notch (217) which is in clearance fit with the spline.