CN114233720A - Hydraulic oil cylinder thrust measuring device and measuring method - Google Patents
Hydraulic oil cylinder thrust measuring device and measuring method Download PDFInfo
- Publication number
- CN114233720A CN114233720A CN202210079956.XA CN202210079956A CN114233720A CN 114233720 A CN114233720 A CN 114233720A CN 202210079956 A CN202210079956 A CN 202210079956A CN 114233720 A CN114233720 A CN 114233720A
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- pressure sensor
- hydraulic
- cylinder
- thrust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 86
- 238000005259 measurement Methods 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
Abstract
The invention belongs to the technical field of hydraulic oil cylinders, and discloses a hydraulic oil cylinder thrust measuring device and a measuring method, which are used for measuring the thrust of a hydraulic oil cylinder, wherein the hydraulic oil cylinder thrust measuring device comprises a hydraulic pump, an auxiliary oil cylinder, a pressure sensor and a controller, and the hydraulic pump is used for driving a piston rod of the hydraulic oil cylinder to stretch; the hydraulic pump is also used for driving a piston rod of the auxiliary oil cylinder to stretch, and the free end of the piston rod of the auxiliary oil cylinder is provided with a force application contact; the force-applying contact is connected with the force-applying contact through a pressure sensor; the controller is electrically connected with the pressure sensor and used for calculating the thrust of the hydraulic oil cylinder according to the measurement signal of the pressure sensor. The hydraulic oil that the hydraulic pump provided flows to hydraulic cylinder and auxiliary cylinder respectively, and auxiliary cylinder's piston rod stretches out the butt in pressure sensor, and pressure sensor surveys thrust information to transmit the controller, thereby the controller calculates and has obtained hydraulic cylinder's thrust.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a device and a method for measuring thrust of a hydraulic cylinder.
Background
The hydraulic sensor can convert the sensed liquid or gas thrust into a standard electric signal to be output externally, specifically, the pressure of hydraulic oil is measured by connecting the hydraulic sensor to an oil path from the hydraulic pump to the hydraulic oil cylinder, and the thrust of the hydraulic oil cylinder is calculated by using a formula. However, after the hydraulic sensor is installed, the hydraulic sensor is directly contacted with hydraulic oil, the temperature of the hydraulic oil is continuously increased along with the increase of the working time of the hydraulic oil cylinder, the viscosity of the hydraulic oil is continuously reduced along with the increase of the temperature of the hydraulic oil, and the pushing-out speed of a piston rod of the hydraulic oil cylinder is also changed due to the changes of the resistance, the temperature of the hydraulic oil and the viscosity of the hydraulic oil. The variation of the above-mentioned influencing factors causes larger fluctuation and error of the liquid pressure measured by the hydraulic sensor, and the calculated thrust of the hydraulic oil cylinder also has larger fluctuation and error.
Disclosure of Invention
The invention aims to provide a thrust measuring device of a hydraulic oil cylinder, which improves the calculation precision of the thrust of the hydraulic oil cylinder.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic cylinder thrust measurement device comprising:
the hydraulic pump is used for driving a piston rod of the hydraulic oil cylinder to stretch;
the hydraulic pump is also used for driving a piston rod of the auxiliary oil cylinder to stretch, and a free end of the piston rod of the auxiliary oil cylinder is provided with a force application contact;
the pressure sensor is used for detecting the acting force applied to the stressed contact by the force application contact;
and the controller is electrically connected with the pressure sensor and used for calculating the thrust of the hydraulic oil cylinder according to the measurement signal of the pressure sensor.
Preferably, the hydraulic cylinder system further comprises a three-way valve, wherein the three-way valve comprises a first interface, a second interface and a third interface, the first interface can be communicated with the hydraulic pump, the second interface can be communicated with the hydraulic cylinder, the third interface can be communicated with the auxiliary cylinder, and the first interface can be simultaneously communicated with the second interface and the third interface.
Preferably, the oil cylinder further comprises a connecting assembly, the third interface is communicated with the oil inlet of the auxiliary oil cylinder through the connecting assembly, the connecting assembly comprises a connecting joint and a connecting pipeline communicated with the connecting joint, the connecting joint is communicated with the oil inlet of the auxiliary oil cylinder, and the connecting pipeline is communicated with the third interface.
Preferably, the device further comprises a first protection portion and a second protection portion which are oppositely arranged along the abutting direction of the force application contact and the force receiving contact, the auxiliary cylinder and the pressure sensor are arranged between the first protection portion and the second protection portion, the auxiliary cylinder is installed on the first protection portion, and the pressure sensor is installed on the second protection portion.
Preferably, the first protection portion and the second protection portion are detachably connected.
Preferably, the method further comprises the following steps:
the protection cylinder is sleeved outside the auxiliary oil cylinder and the pressure sensor, the upper end of the protection cylinder is fixedly connected with the first protection part, and the other end of the protection cylinder is abutted against the second protection part;
the connecting plate is sleeved outside the protection cylinder and abutted to the outer peripheral face of the protection cylinder, and the connecting plate is fixedly connected with the second protection part.
Preferably, the auxiliary oil cylinder is adjustable in position along the abutting direction of the force application contact and the force receiving contact.
Preferably, the pressure sensor is a spoke type pressure sensor, an electric type pressure sensor, an electromagnetic type pressure sensor, a capacitance type pressure sensor, a vibrating wire type pressure sensor, or a diffused silicon pressure sensor.
Preferably, the force application contact is in surface contact with the force receiving contact.
The invention also aims to provide a hydraulic cylinder thrust measuring method, which uses the hydraulic cylinder thrust measuring device to measure and comprises the following steps:
s1, enabling the hydraulic pump to be communicated with the hydraulic oil cylinder and the auxiliary oil cylinder;
s2, enabling a piston rod of the auxiliary oil cylinder to abut against a pressure sensor, wherein the pressure sensor can measure acting force applied to the pressure sensor by the auxiliary oil cylinder;
s3, the controller can receive the measuring signal transmitted by the pressure sensor and according to the formula f1＝kf2Calculating the thrust of the hydraulic oil cylinder, wherein f1Is the thrust of the hydraulic oil cylinder, f2And k is the ratio of the contact area of the piston rod of the hydraulic oil cylinder and the oil cavity of the hydraulic oil cylinder to the contact area of the piston rod of the auxiliary oil cylinder and the oil cavity of the auxiliary oil cylinder.
The invention has the beneficial effects that:
according to the hydraulic oil cylinder thrust measuring device provided by the invention, hydraulic oil provided by the hydraulic pump flows to the hydraulic oil cylinder and the auxiliary oil cylinder respectively, the piston rod of the hydraulic oil cylinder extends out to do work, the piston rod of the auxiliary oil cylinder extends out to abut against the pressure sensor, the pressure sensor measures thrust information and transmits the thrust information to the controller, and the controller calculates so as to obtain the thrust of the hydraulic oil cylinder. Compared with the mode of using a hydraulic sensor in the prior art, the thrust measuring device for the hydraulic oil cylinder provided by the invention obtains the thrust of the hydraulic oil cylinder by indirectly measuring the thrust of the auxiliary oil cylinder, is slightly influenced by the temperature and viscosity of hydraulic oil, the push-out speed of a piston rod of the hydraulic oil cylinder and other factors, and has higher measuring precision.
Drawings
Fig. 1 is a schematic structural diagram of a thrust measuring device of a hydraulic oil cylinder provided by an embodiment of the invention.
In the figure:
100. a hydraulic cylinder;
1. a hydraulic pump;
2. an auxiliary oil cylinder; 21. a force application contact;
3. a pressure sensor; 31. a stressed contact; 32. a signal outlet terminal;
4. a controller; 41. a signal line;
5. a three-way valve;
6. a connecting assembly; 61. connecting a joint; 62. connecting a pipeline;
7. a first protection portion;
8. a second protection section;
9. a protective cylinder; 91. a first cylinder; 911. a first through hole; 92. a connecting cover; 93. a second cylinder; 931. a second through hole;
10. a connecting plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present embodiments, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the embodiments of the present invention, the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a thrust measuring device of a hydraulic cylinder, which is used for measuring the thrust of the hydraulic cylinder 100, and as shown in fig. 1, the device comprises a hydraulic pump 1, an auxiliary cylinder 2, a pressure sensor 3 and a controller 4, wherein the hydraulic pump 1 is used for driving a piston rod of the hydraulic cylinder 100 to extend and retract; the hydraulic pump 1 can be communicated with the auxiliary oil cylinder 2, hydraulic oil provided by the hydraulic pump 1 can simultaneously flow to the hydraulic oil cylinder 100 and the auxiliary oil cylinder 2 respectively, the hydraulic pump 1 is also used for driving a piston rod of the auxiliary oil cylinder 2 to stretch, and a free end of the piston rod of the auxiliary oil cylinder 2 is provided with a force application contact 21; the force receiving contact 31 of the pressure sensor 3 is abutted with the force application contact 21, and the pressure sensor 3 is used for detecting the acting force applied to the force receiving contact 31 by the force application contact 21; the pressure sensor 3 is electrically connected with the controller 4, and the controller 4 is used for calculating the thrust of the hydraulic oil cylinder 100 according to the measurement signal of the pressure sensor 3. More specifically, the pressure sensor 3 is provided with a signal outlet terminal 32, and the signal outlet terminal 32 is connected to the controller 4 through a signal line 41, so as to realize transmission of thrust information.
According to the thrust measuring device for the hydraulic oil cylinder, hydraulic oil provided by the hydraulic pump 1 flows to the hydraulic oil cylinder 100 and the auxiliary oil cylinder 2 respectively, a piston rod of the hydraulic oil cylinder 100 stretches out to do work, a piston rod of the auxiliary oil cylinder 2 stretches out to abut against the pressure sensor 3, the pressure sensor 3 measures thrust information and transmits the thrust information to the controller 4, and the controller 4 calculates the thrust of the hydraulic oil cylinder 100. Compared with the mode of using a hydraulic sensor in the prior art, the thrust measuring device for the hydraulic oil cylinder provided by the embodiment obtains the thrust of the hydraulic oil cylinder 100 by indirectly measuring the thrust of the auxiliary oil cylinder 2, is slightly influenced by the temperature and viscosity of hydraulic oil, the push-out speed of a piston rod of the hydraulic oil cylinder 100 and other factors, and has higher measuring precision.
Specifically, in the present embodiment, a signal amplifier is provided on the controller 4, and the signal amplifier is used for amplifying the measurement signal transmitted by the pressure sensor 3.
Specifically, the auxiliary oil cylinder 2 is a single-acting hydraulic cylinder, in this embodiment, the auxiliary oil cylinder 2 is a hydraulic jack, which is provided with an oil inlet, and the pressure relief is performed by the dead weight and the return of an internal spring. In other embodiments, other single acting hydraulic cylinders may be used.
Specifically, the pressure sensor 3 is a spoke type pressure sensor or an electric type pressure sensor, or an electromagnetic type pressure sensor, or a capacitance type pressure sensor, or a vibrating wire type pressure sensor, or a diffused silicon pressure sensor. In this embodiment, the pressure sensor 3 is a spoke type pressure sensor, the spoke type pressure sensor includes a force-applying contact 31, a force-applying contact 21 is disposed on a piston rod of the auxiliary cylinder 2, the piston rod of the auxiliary cylinder 2 can extend downward (downward as shown in fig. 1) under the action of hydraulic oil, the force-applying contact 21 abuts against the force-applying contact 31 capable of abutting against the pressure sensor, and the pressure sensor is stressed to detect the magnitude of the thrust of the piston rod of the auxiliary cylinder 2.
The hydraulic cylinder thrust measuring device that this embodiment provided, when actual installation, the jack setting is in spoke formula pressure sensor's top, and the output of jack is down, and the piston rod and the application of force contact 21 of jack can stretch out and butt in spoke formula pressure sensor's atress contact 31 promptly, are convenient for detect. When the piston rod of the jack is pushed out by the pressure of the hydraulic oil, the piston rod of the jack only generates micro displacement (less than 1 millimeter), the impact on the spoke type pressure sensor in the measuring process is small, and the static force measuring effect is realized; in addition, the time for transmitting the temperature change and the viscosity change generated during the working of the hydraulic oil to the jack and the spoke type pressure sensor is very long, so the spoke type pressure sensor is slightly influenced by the environment in the force measuring process. More specifically, the force application contact 21 is in surface contact with the force receiving contact 31, and the force application contact 21 is mated with the force receiving contact 31.
In other embodiments, the pressure sensor 3 may have another structure as long as it can measure the thrust of the piston rod of the auxiliary cylinder 2, such as a piezoelectric pressure sensor, an electromagnetic pressure sensor, a capacitive pressure sensor, a vibrating wire pressure sensor, a diffused silicon pressure sensor, and the like.
Specifically, as shown in fig. 1, the hydraulic oil cylinder thrust measuring device further includes a three-way valve 5, the three-way valve 5 includes a first interface, a second interface and a third interface, the first interface can be communicated with the hydraulic pump 1, the second interface can be communicated with the hydraulic oil cylinder 100, the third interface can be communicated with the auxiliary oil cylinder 2, and the first interface can be communicated with the second interface and the third interface simultaneously, so that hydraulic oil can be transported conveniently. Two equal hydraulic oils flow from the hydraulic pump 1, one of which flows into the hydraulic cylinder 100 through the first and second ports, and the other of which flows into the auxiliary cylinder 2 through the first and third ports.
Specifically, as shown in fig. 1, the hydraulic cylinder thrust measuring device further includes a connecting assembly 6, and a third port of the three-way valve 5 is communicated with an oil inlet of the auxiliary cylinder 2 through the connecting assembly 6. More specifically, the connecting assembly 6 includes a connecting joint 61 and a connecting line 62 communicated with the connecting joint 61, the connecting joint 61 is communicated with the oil inlet of the auxiliary oil cylinder 2, the connecting line 62 is communicated with the third port, and the hydraulic oil flows out through the hydraulic pump 1 and then flows to the oil inlet of the auxiliary oil cylinder 2 sequentially through the third port of the three-way valve 5, the connecting line 62 and the connecting joint 61.
Further, as shown in fig. 1, the hydraulic cylinder thrust measuring device further includes a first protection portion 7 and a second protection portion 8 which are oppositely disposed along the abutting direction of the force application contact 21 and the force receiving contact 31, the auxiliary cylinder 2 and the pressure sensor 3 are disposed between the first protection portion 7 and the second protection portion 8, the auxiliary cylinder 2 is mounted on the first protection portion 7, and the pressure sensor 3 is mounted on the second protection portion 8. In the present embodiment, the auxiliary cylinder 2 is disposed above the pressure sensor 3 in the vertical direction, the first protection portion 7 is disposed above the auxiliary cylinder 2, the second protection portion 8 is disposed below the pressure sensor 3, and the pressure sensor 3 is fixed on the second protection portion 8 by means of screws or the like. Since the piston rod of the auxiliary cylinder 2 has substantially no displacement, the thrust force can be very large, and the relative positions of the auxiliary cylinder 2 and the pressure sensor 3 are ensured to be stable by arranging the first protection part 7 and the second protection part 8 oppositely.
Specifically, as shown in fig. 1, the first protection portion 7 and the second protection portion 8 are detachably connected, thereby fixing the assist cylinder 2 and the pressure sensor 3. In other embodiments, the auxiliary cylinder 2 may not be mounted on the first protection portion 7, and it is only necessary to ensure that one end of the auxiliary cylinder 2 away from the pressure sensor 3 abuts against the first protection portion 7.
Specifically, as shown in fig. 1, the hydraulic cylinder thrust measuring device further includes a protective cylinder 9 and a connecting plate 10, and the first protective portion 7 and the second protective portion 8 are detachably connected through the protective cylinder 9 and the connecting plate 10. The protection cylinder 9 is sleeved outside the auxiliary oil cylinder 2 and the pressure sensor 3, the upper end of the protection cylinder 9 is fixedly connected with the first protection part 7, and the other end of the protection cylinder is abutted against the second protection part 8; the connecting plate 10 is sleeved outside the protection cylinder 9 and is abutted against the outer peripheral surface of the protection cylinder 9, and the connecting plate 10 is fixedly connected with the second protection part 8.
More specifically, as shown in fig. 1, the protection cylinder 9 includes a first cylinder 91, a connection cover 92 and a second cylinder 93, the first cylinder 91 is of a cylindrical structure and is sleeved on the auxiliary oil cylinder 2, the first protection portion 7 is of a disc-shaped structure, the first protection portion 7 is disposed at one end of the first cylinder 91 and is welded to the first cylinder 91, the second cylinder 93 is of a cylindrical structure and is sleeved on the pressure sensor 3, the connection cover 92 is of an annular structure, the connection cover 92 is disposed at one end of the second cylinder 93 close to the first cylinder 91, and two ends of the connection cover 92 are connected to the second cylinder 93 and the first cylinder 91. In this embodiment, the connecting plate 10 is sleeved outside the second cylinder 93 of the protection cylinder 9 and welded to the second cylinder 93, and the connecting plate 10 is detachably connected to the second mounting portion 8 through a mounting member.
More specifically, the mounting member includes a bolt and a nut, a first mounting hole is opened in the connecting plate 10, a second mounting hole is opened in the second protection portion 8, the bolt passes through the first mounting hole and the second mounting hole, and the nut is screwed to the bolt and abuts against an end surface of the second protection portion 8, thereby fixing the connecting plate 10 and the second protection portion 8. Connecting plate 10 is the loop configuration, has seted up a plurality of first mounting holes along the circumference of connecting plate 10, and a plurality of second mounting holes have been seted up to 8 first mounting holes that correspond of second protection portion, and the installed part is provided with a plurality ofly, a plurality of first mounting holes, a plurality of second mounting holes and a plurality of installed part one-to-one, guarantee connecting plate 10 and second protection portion 8's joint strength.
Specifically, as shown in fig. 1, the first cylinder 91 is provided with a first through hole 911, the connecting pipe 62 can be connected to the connecting joint 61 through the first through hole 911, the second cylinder 93 is provided with a second through hole 931, and the signal line 41 can be connected to the signal outlet terminal 32 through the second through hole 931.
In other embodiments, the position in the abutting direction of the force application contact 21 and the force receiving contact 31 is adjustable, the auxiliary cylinder 2 is disposed above the pressure sensor 3, and the height of the auxiliary cylinder 2 in the vertical direction in the protective cylinder 9 can be adjusted to adjust the initial positions of the auxiliary cylinder 2 and the pressure sensor 3. The first protection part 7 is provided with a third through hole, an adjusting screw is arranged at the tail end of the auxiliary oil cylinder 2, namely, at the end of the auxiliary oil cylinder 2 far away from the pressure sensor 3, and a screwdriver passes through the third through hole to rotate the adjusting screw, so that the initial position between the auxiliary oil cylinder 2 and the pressure sensor 3 is adjusted, and the pressure sensor 3 is calibrated before measurement is started each time.
In actual installation, the first protection part 7, the protection cylinder 9 and the connection plate 10 are welded, and then the whole body is sleeved outside the auxiliary oil cylinder 2 and the pressure sensor 3. In other embodiments, the first protection portion 7, the protection cylinder 9 and the connection plate 10 are integrally formed and integrally produced by a mold, so long as they function to protect the auxiliary cylinder 2 and the pressure sensor 3.
The embodiment also provides a hydraulic cylinder thrust measuring method, which uses the hydraulic cylinder thrust measuring device to measure and comprises the following steps:
s1, enabling the hydraulic pump 1 to be communicated with the hydraulic oil cylinder 100 and the auxiliary oil cylinder 2, and driving a piston rod of the hydraulic oil cylinder 100 to stretch and a piston rod of the auxiliary oil cylinder 2 to stretch;
s2, a piston rod of the auxiliary oil cylinder 2 can abut against the pressure sensor 3, and the pressure sensor 3 can measure the acting force applied to the pressure sensor 3 by the auxiliary oil cylinder 2;
s3, the controller 4 can receive the measuring signal transmitted by the pressure sensor 3 and according to the formula f1＝kf2Calculating the thrust of the hydraulic oil cylinder 100, wherein f1The thrust of hydraulic cylinder 100 is f2The value k is the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3, and is the ratio of the contact area between the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 to the contact area between the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2.
In this embodiment, the auxiliary oil cylinder 2 is disposed above the pressure sensor 3, a piston rod of the auxiliary oil cylinder 2 can extend out under the action of hydraulic oil, the force application contact 21 of the auxiliary oil cylinder 2 abuts against the force receiving contact 31 of the pressure sensor 3, the pressure sensor 3 measures the thrust of the piston rod of the auxiliary oil cylinder 2 and transmits the measurement signal to the controller 4, the piston rod of the hydraulic oil cylinder 100 extends downward in the vertical direction to do work, the piston rod of the auxiliary oil cylinder 2 also extends downward in the vertical direction to do work, the contact area between the piston rod of the hydraulic oil cylinder 100 and the oil cavity of the hydraulic oil cylinder 100 is equal to the contact area between the piston rod of the auxiliary oil cylinder 2 and the oil cavity of the auxiliary oil cylinder 2, the influence of factors such as friction is ignored, and the thrust of the piston rod of the auxiliary oil cylinder 2 measured by the pressure sensor 3 is the thrust of the hydraulic oil cylinder 100.
In other embodiments, the contact area between the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 and the contact area between the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2 may not be equal, in which case the magnitude of the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3 needs to be multiplied by a coefficient k to be equal to the magnitude of the thrust of the hydraulic cylinder 100, and the formula is as follows: f. of1＝kf2Wherein f is1The thrust of the hydraulic oil cylinder 100 is largeSmall, f2The value k is the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3, and is the ratio of the contact area between the piston rod of the hydraulic cylinder 100 and the oil chamber of the hydraulic cylinder 100 to the contact area between the piston rod of the auxiliary cylinder 2 and the oil chamber of the auxiliary cylinder 2, for example, the contact area between the piston rod of the hydraulic cylinder 100 and the oil chamber of the hydraulic cylinder 100 is 10, the contact area between the piston rod of the auxiliary cylinder 2 and the oil chamber of the auxiliary cylinder 2 is 5, and the value k is 10/5-2.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A hydraulic cylinder thrust measurement device, characterized by includes:
the hydraulic pump (1) is used for driving a piston rod of the hydraulic oil cylinder (100) to stretch;
the hydraulic pump (1) is also used for driving a piston rod of the auxiliary oil cylinder (2) to stretch, and a free end of the piston rod of the auxiliary oil cylinder (2) is provided with a force application contact (21);
the pressure sensor (3), a force-receiving contact (31) of the pressure sensor (3) is abutted with the force-receiving contact (21), and the pressure sensor (3) is used for detecting the acting force applied to the force-receiving contact (31) by the force-receiving contact (21);
the controller (4) is electrically connected with the pressure sensor (3), and the controller (4) is used for calculating the thrust of the hydraulic oil cylinder (100) according to the measurement signal of the pressure sensor (3).
2. The hydraulic ram thrust measurement device according to claim 1, characterized by further comprising a three-way valve (5), wherein the three-way valve (5) comprises a first port capable of communicating with the hydraulic pump (1), a second port capable of communicating with the hydraulic ram (100), and a third port capable of communicating with the auxiliary ram (2), and wherein the first port is capable of communicating with both the second port and the third port.
3. The hydraulic oil cylinder thrust measuring device of claim 2, characterized by further comprising a connecting assembly (6), wherein the third interface is communicated with the oil inlet of the auxiliary oil cylinder (2) through the connecting assembly (6), the connecting assembly (6) comprises a connecting joint (61) and a connecting pipeline (62) communicated with the connecting joint (61), the connecting joint (61) is communicated with the oil inlet of the auxiliary oil cylinder (2), and the connecting pipeline (62) is communicated with the third interface.
4. The hydraulic oil cylinder thrust measuring device according to claim 1, further comprising a first protection portion (7) and a second protection portion (8) which are oppositely arranged along the abutting direction of the force application contact (21) and the force receiving contact (31), wherein the auxiliary oil cylinder (2) and the pressure sensor (3) are arranged between the first protection portion (7) and the second protection portion (8), the auxiliary oil cylinder (2) is mounted on the first protection portion (7), and the pressure sensor (3) is mounted on the second protection portion (8).
5. Hydraulic oil cylinder thrust measurement device according to claim 4, characterized in that said first protection portion (7) and said second protection portion (8) are removably connected.
6. The hydraulic ram thrust measurement device of claim 5, further comprising:
the protection cylinder (9) is sleeved outside the auxiliary oil cylinder (2) and the pressure sensor (3), the upper end of the protection cylinder (9) is fixedly connected with the first protection part (7), and the other end of the protection cylinder abuts against the second protection part (8);
the connecting plate (10) is sleeved outside the protection barrel (9) and abutted to the outer peripheral surface of the protection barrel (9), and the connecting plate (10) is fixedly connected with the second protection part (8).
7. The hydraulic oil cylinder thrust measuring device according to claim 1, characterized in that the auxiliary oil cylinder (2) is adjustable in position along the abutting direction of the force application contact (21) and the force receiving contact (31).
8. Hydraulic oil cylinder thrust measurement device according to claim 1, characterized in that said pressure sensor (3) is a spoke pressure sensor, or an electric pressure sensor, or an electromagnetic pressure sensor, or a capacitive pressure sensor, or a vibrating wire pressure sensor, or a diffused silicon pressure sensor.
9. Hydraulic ram thrust measurement device according to claim 1, characterized in that said force application contact (21) is in surface contact with said force-receiving contact (31).
10. A method for measuring the thrust of a hydraulic cylinder by using the device for measuring the thrust of a hydraulic cylinder according to any one of claims 1 to 9, which comprises the following steps:
s1, enabling the hydraulic pump (1) to be communicated with the hydraulic oil cylinder (100) and the auxiliary oil cylinder (2);
s2, a piston rod of the auxiliary oil cylinder (2) can be abutted against a pressure sensor (3), and the pressure sensor (3) can measure the acting force applied to the pressure sensor (3) by the auxiliary oil cylinder (2);
s3, the controller (4) can receive the measuring signal transmitted by the pressure sensor (3) and according to the formula f1＝kf2Calculating the thrust of the hydraulic oil cylinder (100), wherein f1Is the thrust of the hydraulic oil cylinder (100), f2The thrust of the piston rod of the auxiliary oil cylinder (2) measured by the pressure sensor (3) is measured, and k is the contact area between the piston rod of the hydraulic oil cylinder (100) and the oil cavity of the hydraulic oil cylinder (100) and the activity of the auxiliary oil cylinder (2)The ratio of the contact area of the plug rod and the oil cavity of the auxiliary oil cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079956.XA CN114233720A (en) | 2022-01-24 | 2022-01-24 | Hydraulic oil cylinder thrust measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079956.XA CN114233720A (en) | 2022-01-24 | 2022-01-24 | Hydraulic oil cylinder thrust measuring device and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114233720A true CN114233720A (en) | 2022-03-25 |
Family
ID=80747002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210079956.XA Pending CN114233720A (en) | 2022-01-24 | 2022-01-24 | Hydraulic oil cylinder thrust measuring device and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233720A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB827226A (en) * | 1956-02-02 | 1960-02-03 | Ericsson Telefon Ab L M | Improvements in or relating to apparatus for measuring the force exerted by a hydraulic press |
| US20040129085A1 (en) * | 2002-12-18 | 2004-07-08 | Mundry Sebastian M. | Pressure cell device for measuring hydraulic pressures |
| JP2010180913A (en) * | 2009-02-03 | 2010-08-19 | Shimadzu Corp | Single rod double-acting cylinder and testing machine |
| CN201740704U (en) * | 2010-06-24 | 2011-02-09 | 济南试金集团有限公司 | Two-way cylinder electronic-hydraulic servo pressure testing machine |
| CN202661327U (en) * | 2012-05-17 | 2013-01-09 | 天水红山试验机有限公司 | Large-tonnage electro-hydraulic servo hydraulic actuator |
| CN104632755A (en) * | 2014-12-31 | 2015-05-20 | 太原科技大学 | Anti-unbalance-loading overloading servo hydraulic cylinder |
| CN207064378U (en) * | 2017-08-08 | 2018-03-02 | 泸州汇通液压机械有限公司 | A kind of cigarette machine hydraulic jack |
| CN208364533U (en) * | 2018-06-22 | 2019-01-11 | 福建省龙岩盛通液压有限公司 | A kind of cylinder protection device |
| CN213039557U (en) * | 2020-06-21 | 2021-04-23 | 安徽五洋机床制造有限公司 | Punch press hydraulic cylinder with high shock-absorbing capacity |
| CN113153862A (en) * | 2021-04-15 | 2021-07-23 | 天地科技股份有限公司 | Digital oil cylinder and control method thereof |
| CN216922710U (en) * | 2022-01-24 | 2022-07-08 | 上海神舟精宜汽车测控技术有限公司 | Hydraulic cylinder thrust measuring device |
-
2022
- 2022-01-24 CN CN202210079956.XA patent/CN114233720A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB827226A (en) * | 1956-02-02 | 1960-02-03 | Ericsson Telefon Ab L M | Improvements in or relating to apparatus for measuring the force exerted by a hydraulic press |
| US20040129085A1 (en) * | 2002-12-18 | 2004-07-08 | Mundry Sebastian M. | Pressure cell device for measuring hydraulic pressures |
| JP2010180913A (en) * | 2009-02-03 | 2010-08-19 | Shimadzu Corp | Single rod double-acting cylinder and testing machine |
| CN201740704U (en) * | 2010-06-24 | 2011-02-09 | 济南试金集团有限公司 | Two-way cylinder electronic-hydraulic servo pressure testing machine |
| CN202661327U (en) * | 2012-05-17 | 2013-01-09 | 天水红山试验机有限公司 | Large-tonnage electro-hydraulic servo hydraulic actuator |
| CN104632755A (en) * | 2014-12-31 | 2015-05-20 | 太原科技大学 | Anti-unbalance-loading overloading servo hydraulic cylinder |
| CN207064378U (en) * | 2017-08-08 | 2018-03-02 | 泸州汇通液压机械有限公司 | A kind of cigarette machine hydraulic jack |
| CN208364533U (en) * | 2018-06-22 | 2019-01-11 | 福建省龙岩盛通液压有限公司 | A kind of cylinder protection device |
| CN213039557U (en) * | 2020-06-21 | 2021-04-23 | 安徽五洋机床制造有限公司 | Punch press hydraulic cylinder with high shock-absorbing capacity |
| CN113153862A (en) * | 2021-04-15 | 2021-07-23 | 天地科技股份有限公司 | Digital oil cylinder and control method thereof |
| CN216922710U (en) * | 2022-01-24 | 2022-07-08 | 上海神舟精宜汽车测控技术有限公司 | Hydraulic cylinder thrust measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216922710U (en) | Hydraulic cylinder thrust measuring device | |
| CN109946020B (en) | Dynamic testing and calibrating device for rapid pressure sensor | |
| CN110160905B (en) | Variable working condition reciprocating friction wear testing machine based on double-freedom-degree flexible hinge | |
| US6705169B2 (en) | Pressure mediator with module for detecting broken diaphragms, and module for detecting broken diaphragms | |
| CN106546377A (en) | Pressure-gradient transducer component with overload protection | |
| WO2015042257A1 (en) | Improved load cell for measuring load on a rod | |
| CN114233720A (en) | Hydraulic oil cylinder thrust measuring device and measuring method | |
| CN113153724B (en) | Diaphragm compressor diaphragm pulsation system fault diagnosis device based on industrial internet platform | |
| US4491027A (en) | Wide-range load cell | |
| CN202937430U (en) | Disc-shaped sensor valve-based piezoelectric stack pump | |
| CN103868574A (en) | Hydraulic vehicle load sensor | |
| CN106018087A (en) | All-electric ground strength testing device | |
| CN217084519U (en) | Movable hydraulic torque calibration device suitable for low-speed high-power hydraulic dynamometer | |
| CN200986498Y (en) | Safety valve online checking device | |
| RU2395065C1 (en) | Method of determination jet engine thrust and device for realising said method | |
| CN108982001B (en) | Method and device for measuring braking torque of disc brake of mine hoist | |
| CN110672287B (en) | Rigidity measuring device of electric actuator | |
| US20230184611A1 (en) | Connecting piece for fluid-conducting line systems | |
| US4333331A (en) | Calibrating unit for calibrating a hydraulic or electric pressure gauge, especially of a probing device | |
| CN107907261A (en) | A kind of vertical force checking device of the bi-bellow of bridge pad and detection method | |
| CN220583485U (en) | Double differential pressure sensor | |
| US3566694A (en) | Pressure transducer | |
| CN108150483B (en) | Hydraulic module bearing test device | |
| CN217819341U (en) | Large-scale ore deposit card suspension cylinder reliability test device with detect and regulatory function | |
| CN220893308U (en) | Bidirectional-driving strain gauge calibrating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |