CN114233720B - Hydraulic cylinder thrust measuring device and measuring method - Google Patents
Hydraulic cylinder thrust measuring device and measuring method Download PDFInfo
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- CN114233720B CN114233720B CN202210079956.XA CN202210079956A CN114233720B CN 114233720 B CN114233720 B CN 114233720B CN 202210079956 A CN202210079956 A CN 202210079956A CN 114233720 B CN114233720 B CN 114233720B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 51
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 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
- 230000008859 change Effects 0.000 description 3
- 230000009471 action Effects 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
- 230000001681 protective effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of hydraulic cylinders, and discloses a hydraulic cylinder thrust measuring device and a measuring method, wherein the hydraulic cylinder thrust measuring device is used for measuring thrust of a hydraulic cylinder and comprises a hydraulic pump, an auxiliary cylinder, a pressure sensor and a controller, and the hydraulic pump is used for driving a piston rod of the hydraulic cylinder to stretch; the hydraulic pump is also used for driving a piston rod of the auxiliary oil cylinder to stretch and retract, and the free end of the piston rod of the auxiliary oil cylinder is provided with a force application contact; the force-bearing contact of the pressure sensor is abutted with the force-application contact, and the pressure sensor is used for detecting the acting force applied to the force-bearing contact by the force-application contact; the controller is electrically connected with the pressure sensor and is used for calculating the thrust of the hydraulic cylinder according to the measurement signal of the pressure sensor. Hydraulic oil provided by the hydraulic pump flows to the hydraulic oil cylinder and the auxiliary oil cylinder respectively, a piston rod of the auxiliary oil cylinder stretches out and abuts against the pressure sensor, thrust information is measured by the pressure sensor and is transmitted to the controller, and the controller calculates to obtain the thrust of the hydraulic oil cylinder.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder thrust measuring device and a hydraulic cylinder thrust measuring method.
Background
The hydraulic sensor can convert the sensed liquid or gas thrust into a standard electric signal to be output outwards, specifically, the hydraulic pressure is measured by connecting the hydraulic sensor on an oil path from the hydraulic pump to the hydraulic cylinder, and the thrust of the hydraulic cylinder is calculated by using a formula. But the hydraulic sensor is directly contacted with hydraulic oil after being installed, the temperature of the hydraulic oil can be continuously increased along with the increase of the working time of the hydraulic oil cylinder, the viscosity of the hydraulic oil can be continuously reduced along with the increase of the temperature of the hydraulic oil, and the push-out speed of a piston rod of the hydraulic oil cylinder can be changed due to the change of the resistance, the temperature of the hydraulic oil and the viscosity of the hydraulic oil. The above-mentioned influence factor changes cause the liquid pressure measured by the hydraulic pressure sensor to have larger fluctuation and error, so that the calculated hydraulic cylinder thrust also has larger fluctuation and error.
Disclosure of Invention
The invention aims to provide a hydraulic cylinder thrust measuring device which improves the calculation accuracy of the thrust of a hydraulic cylinder.
To achieve the purpose, the invention adopts the following technical scheme:
A hydraulic ram thrust measurement device, comprising:
the hydraulic pump is used for driving a piston rod of the hydraulic oil cylinder to stretch and retract;
the hydraulic pump is also used for driving a piston rod of the auxiliary oil cylinder to stretch and retract, and the free end of the piston rod of the auxiliary oil cylinder is provided with a force application contact;
The force-bearing contact of the pressure sensor is abutted with the force-application contact, and the pressure sensor is used for detecting the acting force applied by the force-application contact to the force-bearing contact;
And the controller is electrically connected with the pressure sensor and is used for calculating the thrust of the hydraulic cylinder according to the measurement signal of the pressure sensor.
Preferably, the hydraulic pump 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 hydraulic oil pump further comprises a connecting assembly, the third interface is communicated with an 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 part and a second protection part which are oppositely arranged along the abutting direction of the force application contact and the force receiving contact, the auxiliary oil cylinder and the pressure sensor are arranged between the first protection part and the second protection part, the auxiliary oil cylinder is installed on the first protection part, and the pressure sensor is installed on the second protection part.
Preferably, the first protection portion and the second protection portion are detachably connected.
Preferably, the method further comprises:
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 to the second protection part;
The connecting plate is sleeved outside the protection cylinder and is abutted to the outer peripheral surface of the protection cylinder, and the connecting plate is fixedly connected with the second protection part.
Preferably, the auxiliary 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 capacitive-type pressure sensor, a vibrating string-type pressure sensor, or a diffused silicon pressure sensor.
Preferably, the force application contact is in surface contact with the force receiving contact.
Another object of the present invention is to provide a hydraulic cylinder thrust measuring method, which uses the hydraulic cylinder thrust measuring device to measure, comprising the following steps:
S1, enabling a hydraulic pump to be communicated with a hydraulic cylinder and an auxiliary cylinder;
S2, a piston rod of the auxiliary oil cylinder can be abutted against a pressure sensor, and the pressure sensor can measure acting force applied to the pressure sensor by the auxiliary oil cylinder;
And S3, the controller can receive the measurement signal transmitted by the pressure sensor and calculate the thrust of the hydraulic cylinder according to a formula f 1＝kf2, wherein f 1 is the thrust of the hydraulic cylinder, f 2 is the thrust of the piston rod of the auxiliary cylinder measured by the pressure sensor, and k is the ratio of the contact area of the piston rod of the hydraulic cylinder and the oil cavity of the hydraulic cylinder to the contact area of the piston rod of the auxiliary cylinder and the oil cavity of the auxiliary cylinder.
The invention has the beneficial effects that:
According to the hydraulic cylinder thrust measuring device provided by the invention, hydraulic oil provided by the hydraulic pump flows to the hydraulic cylinder and the auxiliary cylinder respectively, the piston rod of the hydraulic cylinder stretches out to do work, the piston rod of the auxiliary cylinder stretches out to be abutted against the pressure sensor, the pressure sensor measures thrust information and transmits the thrust information to the controller, and the controller calculates to obtain the thrust of the hydraulic cylinder. Compared with the mode of using a hydraulic sensor in the prior art, the hydraulic cylinder thrust measuring device provided by the invention has the advantages that the thrust of the auxiliary cylinder is indirectly measured, so that the thrust of the hydraulic cylinder is obtained, the influence of factors such as the temperature and viscosity of hydraulic oil and the push-out speed of a piston rod of the hydraulic cylinder is small, and the measuring precision is higher.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic cylinder thrust measuring device according to an embodiment of the present 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 stress contact; 32. a signal outlet terminal;
4. a controller; 41. a signal line;
5. A three-way valve;
6. A connection assembly; 61. a connection joint; 62. a connecting pipeline;
7. a first protection part;
8. A second protection part;
9. A protective cylinder; 91. a first cylinder; 911. a first through hole; 92. a connection cover; 93. a second cylinder; 931. a second through hole;
10. And (5) connecting a plate.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present embodiment, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the embodiments of the present invention, the terms "upper", "lower", "right", and the like are used for convenience of description and simplicity of operation based on the azimuth or positional relationship shown in the drawings, and are not to be construed as limiting the present invention, as the means or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The present embodiment provides a hydraulic cylinder thrust measuring device for measuring thrust of a hydraulic cylinder 100, as shown in fig. 1, which includes 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 retract, and a force application contact 21 is arranged at the free end of the piston rod of the auxiliary oil cylinder 2; the force-receiving contact 31 of the pressure sensor 3 is abutted against the force-applying contact 21, and the pressure sensor 3 is used for detecting the acting force applied by the force-applying contact 21 to the force-receiving contact 31; the pressure sensor 3 is electrically connected with the controller 4, and the controller 4 is used for calculating the thrust of the hydraulic 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, thereby realizing transmission of thrust information.
According to the hydraulic cylinder thrust measuring device provided by the embodiment, the hydraulic pump 1 provides hydraulic oil to flow to the hydraulic cylinder 100 and the auxiliary cylinder 2 respectively, a piston rod of the hydraulic cylinder 100 stretches out to do work, the piston rod of the auxiliary cylinder 2 stretches out to be abutted to 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 cylinder 100. Compared with the mode of using a hydraulic sensor in the prior art, the hydraulic cylinder thrust measuring device provided by the embodiment indirectly measures the thrust of the auxiliary cylinder 2, so that the thrust of the hydraulic cylinder 100 is obtained, the influence of factors such as the temperature and viscosity of hydraulic oil and the pushing-out speed of a piston rod of the hydraulic cylinder 100 is small, and the measuring precision is higher.
Specifically, in the present embodiment, a signal amplifier for amplifying the measurement signal transmitted from the pressure sensor 3 is provided on the controller 4.
Specifically, the auxiliary cylinder 2 is a single-acting hydraulic cylinder, and in this embodiment, the auxiliary cylinder 2 adopts a hydraulic jack, which is provided with an oil inlet, and is reset by self weight and an internal spring after pressure relief. 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 string-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-bearing contact 31, a force-applying contact 21 is disposed on a piston rod of the auxiliary cylinder 2, under the action of hydraulic oil, the piston rod of the auxiliary cylinder 2 can extend downward (as shown in the lower part of fig. 1), the force-applying contact 21 is abutted to the force-bearing contact 31 which can be abutted to the pressure sensor, and the pressure sensor is stressed to detect the thrust of the piston rod of the auxiliary cylinder 2.
According to the hydraulic cylinder thrust measuring device provided by the embodiment, during actual installation, the jack is arranged above the spoke type pressure sensor, the output end of the jack faces downwards, namely, the piston rod of the jack and the force application contact 21 can extend out and abut against the force application contact 31 of the spoke type pressure sensor, and detection is facilitated. When the piston rod of the jack is pushed out by the pressure of hydraulic oil, the piston rod of the jack only generates micro displacement (less than 1 millimeter), and the impact on the spoke type pressure sensor in the measuring process is small, so that the effect of static force measurement 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 long, so that the spoke type pressure sensor is little affected by the environment in the force measuring process. More specifically, the force contact 21 is in surface contact with the force contact 31, and the force contact 21 is tightly fitted with the force contact 31.
In other embodiments, the pressure sensor 3 may be configured so long as it can measure the thrust of the piston rod of the auxiliary cylinder 2, for example, a piezoelectric pressure sensor, an electromagnetic pressure sensor, a capacitive pressure sensor, a vibrating string pressure sensor, a diffused silicon pressure sensor, or the like.
Specifically, as shown in fig. 1, the hydraulic 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 cylinder 100, the third interface can be communicated with the auxiliary cylinder 2, and the first interface can be simultaneously communicated with the second interface and the third interface, so that hydraulic oil can be transported conveniently. Two equal amounts of hydraulic oil flow out of the hydraulic pump 1, one of which flows into the hydraulic cylinder 100 through the first port and the second port, and the other of which flows into the auxiliary cylinder 2 through the first port and the third port.
Specifically, as shown in fig. 1, the hydraulic cylinder thrust measuring device further comprises a connecting component 6, and the third interface of the three-way valve 5 is communicated with the oil inlet of the auxiliary cylinder 2 through the connecting component 6. More specifically, the connection assembly 6 includes a connection joint 61 and a connection pipe 62 communicating with the connection joint 61, the connection joint 61 communicates with the oil inlet of the auxiliary cylinder 2, the connection pipe 62 communicates with the third port, and hydraulic oil flows out through the hydraulic pump 1 and then flows to the oil inlet of the auxiliary cylinder 2 sequentially through the third port of the three-way valve 5, the connection pipe 62, and the connection 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 that are disposed opposite to each other in 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 to the second protection portion 8 by means of screws or the like. Since the piston rod of the auxiliary cylinder 2 is basically not displaced, the thrust force can be very large, and the relative position stability of the auxiliary cylinder 2 and the pressure sensor 3 is ensured by relatively arranging the first protection part 7 and the second protection part 8.
Specifically, as shown in fig. 1, the first protector portion 7 and the second protector portion 8 are detachably connected, thereby fixing the auxiliary cylinder 2 and the pressure sensor 3. In other embodiments, the auxiliary cylinder 2 may not be mounted on the first protection portion 7, so as to ensure that an 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 protection cylinder 9 and a connection plate 10, and the first protection portion 7 and the second protection portion 8 are detachably connected by the protection cylinder 9 and the connection 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 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 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 both ends of the connection cover 92 are connected to the second cylinder 93 and the first cylinder 91. In this embodiment, the connection plate 10 is sleeved outside the second cylinder 93 of the protection cylinder 9, and is welded to the second cylinder 93, and the connection 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 provided in the connection plate 10, a second mounting hole is provided 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 face of the second protection portion 8, thereby fixing the connection plate 10 and the second protection portion 8. The connecting plate 10 is annular structure, 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 second protection 8 corresponding to first mounting hole, 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, guarantees the joint strength of connecting plate 10 and second protection 8.
Specifically, as shown in fig. 1, a first through hole 911 is provided in the first cylinder 91, the connection pipe 62 can be connected to the connection joint 61 through the first through hole 911, a second through hole 931 is provided in the second cylinder 93, and the signal wire 41 can be connected to the signal wire outlet terminal 32 through the second through hole 931.
In other embodiments, the position along the abutting direction of the force application contact 21 and the force receiving contact 31 is adjustable, the auxiliary cylinder 2 is arranged 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. A third through hole is formed in the first protection part 7, an adjusting screw is arranged at the tail end of the auxiliary oil cylinder 2, namely, one end, far away from the pressure sensor 3, of the auxiliary oil cylinder 2, and a screwdriver penetrates 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 each measurement is started.
In the actual installation, the first protection portion 7, the protection tube 9, and the connection plate 10 are welded, and then the whole is fitted over the auxiliary 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 are 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 a hydraulic pump 1 to be communicated with a hydraulic cylinder 100 and an auxiliary cylinder 2, so as to drive a piston rod of the hydraulic cylinder 100 to stretch and a piston rod of the auxiliary cylinder 2 to stretch;
S2, a piston rod of the auxiliary cylinder 2 can be abutted against the pressure sensor 3, and the pressure sensor 3 can measure the acting force applied by the auxiliary cylinder 2 to the pressure sensor 3;
And S3, the controller 4 can receive the measurement signal transmitted by the pressure sensor 3 and calculate the thrust of the hydraulic cylinder 100 according to a formula f 1＝kf2, wherein f 1 is the thrust of the hydraulic cylinder 100, f 2 is the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3, and k is the ratio of the contact area of the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 to the contact area of the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2.
In this embodiment, the auxiliary cylinder 2 is disposed above the pressure sensor 3, the piston rod of the auxiliary cylinder 2 can extend under the action of hydraulic oil, the force application contact 21 of the auxiliary cylinder 2 abuts against the force bearing contact 31 of the pressure sensor 3, the pressure sensor 3 measures the thrust of the piston rod of the auxiliary cylinder 2, and transmits the measurement signal to the controller 4, the piston rod of the hydraulic cylinder 100 extends downward in the vertical direction to do work, the piston rod of the auxiliary cylinder 2 also extends downward in the vertical direction to do work, the contact area between the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 is equal to the contact area between the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2, and the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3 is the thrust of the hydraulic cylinder 100, which is neglected from factors such as friction.
In other embodiments, the contact area between the piston rod of the hydraulic cylinder 100 and the oil chamber of the hydraulic cylinder 100 may not be equal to the contact area between the piston rod of the auxiliary cylinder 2 and the oil chamber of the auxiliary cylinder 2, in which case 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 thrust of the hydraulic cylinder 100, where the formula is: f 1＝kf2, wherein f 1 is the thrust of the hydraulic cylinder 100, f 2 is the thrust of the piston rod of the auxiliary cylinder 2 measured by the pressure sensor 3, k is the ratio of the contact area of the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 to the contact area of the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2, for example, the contact area of the piston rod of the hydraulic cylinder 100 and the oil cavity of the hydraulic cylinder 100 is 10, the contact area of the piston rod of the auxiliary cylinder 2 and the oil cavity of the auxiliary cylinder 2 is 5, and then the k value is 10/5=2.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The utility model provides a hydraulic cylinder thrust measuring device which characterized in that includes:
the hydraulic pump (1) is used for driving a piston rod of the hydraulic oil cylinder (100) to stretch and retract;
The hydraulic pump (1) is also used for driving a piston rod of the auxiliary oil cylinder (2) to stretch and retract, and a force application contact (21) is arranged at the free end of the piston rod of the auxiliary oil cylinder (2);
a pressure sensor (3), wherein a force-receiving contact (31) of the pressure sensor (3) is abutted against the force-applying contact (21), and the pressure sensor (3) is used for detecting the acting force applied by the force-applying contact (21) to the force-receiving contact (31);
The controller (4) is electrically connected with the pressure sensor (3), and the controller (4) is used for calculating the thrust of the hydraulic cylinder (100) according to the measurement signal of the pressure sensor (3);
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).
2. The hydraulic ram thrust measuring device according to claim 1, further comprising a three-way valve (5), the three-way valve (5) comprising a first port, a second port and a third port, the first port being communicable with the hydraulic pump (1), the second port being communicable with the hydraulic ram (100), the third port being communicable with the auxiliary ram (2), the first port being communicable with both the second port and the third port.
3. The hydraulic cylinder thrust measuring device according to claim 2, further comprising a connection assembly (6), the third port being in communication with the oil inlet of the auxiliary cylinder (2) through the connection assembly (6), the connection assembly (6) comprising a connection joint (61) and a connection pipe (62) in communication with the connection joint (61), the connection joint (61) being in communication with the oil inlet of the auxiliary cylinder (2), the connection pipe (62) being in communication with the third port.
4. The hydraulic cylinder thrust measuring device according to claim 1, further comprising a first protection portion (7) and a second protection portion (8) which are disposed opposite to each other in a contact direction of the force application contact (21) and the force receiving contact (31), wherein the auxiliary cylinder (2) and the pressure sensor (3) are disposed between the first protection portion (7) and the second protection portion (8), wherein the auxiliary cylinder (2) is mounted to the first protection portion (7), and wherein the pressure sensor (3) is mounted to the second protection portion (8).
5. Hydraulic cylinder thrust measuring device according to claim 4, characterized in that the first protection portion (7) and the second protection portion (8) are detachably 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 is abutted to the second protection part (8);
the connecting plate (10) is sleeved outside the protection cylinder (9) and is in contact with the outer peripheral surface of the protection cylinder (9), and the connecting plate (10) is fixedly connected with the second protection part (8).
7. The hydraulic ram thrust measuring device according to claim 1, characterized in that the pressure sensor (3) is a spoke-type pressure sensor, or an electric pressure sensor, or an electromagnetic pressure sensor, or a capacitive pressure sensor, or a vibrating string-type pressure sensor, or a diffused silicon pressure sensor.
8. Hydraulic cylinder thrust measuring device according to claim 1, characterized in that the force application contact (21) is in surface contact with the force receiving contact (31).
9. A hydraulic ram thrust measuring method using the hydraulic ram thrust measuring device according to any one of claims 1 to 8, characterized by comprising the steps of:
S1, enabling a hydraulic pump (1) to be communicated with a hydraulic cylinder (100) and an auxiliary 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 measurement signal transmitted by the pressure sensor (3) and calculate the thrust of the hydraulic cylinder (100) according to a formula f 1＝kf2, wherein f 1 is the thrust of the hydraulic cylinder (100), f 2 is the thrust of the piston rod of the auxiliary cylinder (2) measured by the pressure sensor (3), and k is the ratio of the contact area of the piston rod of the hydraulic cylinder (100) and the oil cavity of the hydraulic cylinder (100) to the contact area of the piston rod of the auxiliary cylinder (2) and the oil cavity of the auxiliary cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079956.XA CN114233720B (en) | 2022-01-24 | 2022-01-24 | Hydraulic cylinder thrust measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079956.XA CN114233720B (en) | 2022-01-24 | 2022-01-24 | Hydraulic cylinder thrust measuring device and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233720A CN114233720A (en) | 2022-03-25 |
| CN114233720B true CN114233720B (en) | 2024-05-28 |
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| CN202210079956.XA Active CN114233720B (en) | 2022-01-24 | 2022-01-24 | Hydraulic cylinder thrust measuring device and measuring method |
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| 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 |
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| DE20219732U1 (en) * | 2002-12-18 | 2003-03-06 | Dbt Autom Gmbh | Pressure transducers for measuring hydraulic pressures |
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| 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 |
| 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 |
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|---|---|
| CN114233720A (en) | 2022-03-25 |
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