CN111664817A - Gas chamber, and system and method for measuring horizontal clearance between piston and side plate - Google Patents
Gas chamber, and system and method for measuring horizontal clearance between piston and side plate Download PDFInfo
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- CN111664817A CN111664817A CN202010600920.2A CN202010600920A CN111664817A CN 111664817 A CN111664817 A CN 111664817A CN 202010600920 A CN202010600920 A CN 202010600920A CN 111664817 A CN111664817 A CN 111664817A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 9
- 239000012528 membrane Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
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Abstract
The invention relates to a gas chamber and a system and a method for measuring the horizontal clearance between a piston and a side plate, belonging to the technical field of gas storage engineering, comprising a horizontal distance measuring device and a piston inclination measuring device which are connected with a control center of the gas chamber, wherein the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston; the horizontal distance measuring device measures the horizontal distance between the piston and the side plate of the cylinder and sends data of the horizontal distance to the control center of the gas chamber, the piston inclination measuring device measures the inclination of the piston relative to the horizontal plane and sends the inclination data to the control center of the gas chamber, the control center judges the influence of the inclination on the horizontal distance, the horizontal distance after the influence of the inclination is deducted is compared with the standard distance, and the control center sends an alarm signal when the horizontal distance exceeds the standard distance. The invention reduces the investment cost and the maintenance workload of the gas tank.
Description
Technical Field
The invention belongs to the technical field of coal gas storage engineering, and relates to a coal gas cabinet, a system and a method for measuring a horizontal clearance between a piston and a side plate.
Background
The membrane-sealed gas chamber is a piston-type dry gas chamber, the gas chamber adopts a side plate of a cylinder body for sealing gas at the middle-lower part and a rubber membrane fixed between the side plate and a piston for sealing gas at the upper part, and the piston can be divided into a one-section piston and a multi-section piston according to the number of sealing membrane sections of the piston. With a cabinet capacity of 13.5 ten thousand meters3For example, the diameter of the lateral plate of the cylinder body and the outer side of the piston baffle frame is about 60m, the height of the lateral plate is about 70m, the height of the piston baffle frame exceeds 20m, and the piston mass is about 2200t, so that the one-section type membrane-sealed gas tank is huge power equipment manufactured on site.
The distance between the piston and the side plate of the gas chamber is an important parameter for the operation of the gas chamber, and the safe and stable operation of the gas chamber is influenced. Once the eccentric operation of the piston exceeds a set value (generally +/-120 mm of a design value), if effective control or stop operation is not found in time, the huge mass of the piston can impact a cylinder body of a gas chamber, so that the sealing rubber mold is damaged and leaks gas until the piston is inclined or falls down, and serious safety accidents occur.
In the prior art, a plurality of radar position measuring instruments are uniformly distributed on an annular walking platform at the upper part of a piston blocking frame of a one-section type membrane sealing type gas chamber or an annular walking platform at the upper part of a two-section type membrane sealing type gas chamber blocking frame along the circumference concentric with the piston to measure the horizontal distance between the piston and a side plate of a cylinder body so as to prevent the piston from being eccentric. However, the arrangement mode needs more radar position measuring instruments, the investment cost is higher, and meanwhile, the subsequent maintenance workload is increased.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a gas chamber, and a system and a method for measuring a horizontal gap between a piston and a side plate, which not only reduce initial investment cost of the gas chamber, but also reduce subsequent maintenance workload.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a gas chamber piston and curb plate horizontal clearance measurement system, includes horizontal interval measuring device and piston slope measuring device that link to each other with the control center of gas chamber, its characterized in that: the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston baffle frame; the piston inclination measuring device measures the inclination of the piston and sends inclination data to the control center of the gas tank, the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with a standard distance after the influence of the inclination is deducted, and sends an alarm signal when the horizontal distance exceeds the standard distance.
Optionally, the piston inclination measuring device includes a plurality of piston inclination measuring assemblies disposed on the piston, the piston inclination measuring assemblies are distributed on a concentric circle concentric with the piston and close to the inner side of the gas holder cylinder, and the piston inclination measuring assemblies include two piston inclination measuring units symmetrically disposed about the axis of the piston.
Optionally, the horizontal distance measuring unit and the piston inclination measuring unit are located on the same radial plane of the piston.
Optionally, the horizontal spacing measuring units are half the number of the piston inclination measuring units.
Optionally, the piston inclination measuring device is fixed on the piston stop frame or on the piston plate near the inner side of the piston stop frame.
Optionally, the horizontal distance measuring device is an explosion-proof ultrasonic distance meter.
Optionally, the horizontal distance measuring device is an explosion-proof ultrasonic distance meter with a wireless transmission function.
Optionally, the horizontal distance measuring device is arranged in a manner of avoiding the steel wire rope of the leveling device, the manhole of the side plate and the vent hole of the side plate in the circumferential direction of the gas holder.
A gas holder is provided, which applies the measuring system for the horizontal clearance between the piston and the side plate.
A method for measuring the horizontal clearance between a piston and a side plate of a gas chamber comprises the following steps: a piston is provided with a horizontal distance measuring device, the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of a piston blocking frame, and a piston inclination measuring device is arranged on the piston blocking frame or a piston plate which is close to the inner side of the piston blocking frame; the piston inclination measuring device measures the inclination of the piston and sends the inclination data to the control center of the gas tank; and the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with the standard distance after deducting the influence of the inclination, and sends out an alarm signal when the horizontal distance exceeds the standard distance.
Optionally, the piston inclination measuring device comprises a plurality of piston inclination measuring assemblies arranged on the same circumference concentric with the piston, and each piston inclination measuring assembly comprises two piston inclination measuring units symmetrically arranged about the axis of the piston; the horizontal distance measuring unit is half of the number of the piston inclination measuring units, and the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston.
The invention has the beneficial effects that:
1. the horizontal distance measuring device adopts half-circle arrangement, and compared with full-circle arrangement in the prior art, the horizontal distance measuring device reduces common horizontal distance measuring units, thereby not only reducing the initial investment cost of the gas tank, but also reducing the subsequent maintenance workload.
2. The explosion-proof ultrasonic range finder with the wireless transmission function is selected, so that the maintenance workload caused by cable transmission is reduced, a take-up reel with a complex structure is prevented from being arranged on the top of the gas chamber, and the cost of the measuring device is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a membrane-sealed gas chamber according to the present invention;
FIG. 2 is a plan layout view of the horizontal distance measuring device and the piston inclination measuring device of embodiment 1;
fig. 3 is a plan layout view of the horizontal pitch measuring apparatus and the piston inclination measuring apparatus of example 2.
Reference numerals: the device comprises a cylinder body 1, a side plate 101, a side plate vent hole 102, a side plate manhole 103, a piston leveling device 104, a piston 2, a piston plate 201, a piston inclination measuring device 202, a piston blocking frame 203, a piston blocking frame top platform 204, a horizontal distance measuring device 205 and a rubber sealing film 3.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 3, a system for measuring a horizontal gap between a piston and a side plate of a gas chamber includes a horizontal distance measuring device 205 and a piston inclination measuring device 202 connected to a control center of the gas chamber; the horizontal distance measuring device 205 comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston baffle frame 203, and the horizontal distance measuring device 205 is arranged in the circumferential direction of the gas holder to avoid a steel wire rope of the piston leveling device 104 and a side plate manhole 103 and a side plate vent hole 102 which are arranged on the side plate 101 of the cylinder body; the horizontal distance measuring device 205 measures the horizontal distance between the piston 2 and the side plate 101 of the cylinder 1 and sends data of the horizontal distance to a control center of the gas chamber, the piston inclination measuring device 202 measures the inclination of the piston 2 and sends the inclination data to the control center of the gas chamber, the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with the standard distance after deducting the influence of the inclination, and sends an alarm signal when the horizontal distance exceeds the standard distance.
In order to improve the measurement sensitivity and the arrangement convenience, the piston inclination measuring device 202 is fixed on the piston baffle frame 203 or a piston plate close to the inner side of the piston baffle frame 203; the piston inclination measuring device 202 comprises a plurality of piston inclination measuring assemblies distributed on the circumference concentric with the piston 2, and each piston inclination measuring assembly comprises two piston inclination measuring units symmetrically arranged about the axis of the piston; preferably, the horizontal distance measuring unit is half of the number of the piston inclination measuring units, is arranged on the circumference, and is arranged on the top platform 204 of the piston blocking frame along the radial direction of the piston 2, and the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston 2.
Preferably, the horizontal distance measuring unit is an explosion-proof type ultrasonic distance meter.
In order to reduce the maintenance cost, the horizontal distance measuring device 205 of the present invention selects an explosion-proof type ultrasonic distance meter having a wireless transmission function; not only reduces the maintenance workload caused by cable transmission, but also avoids arranging a take-up reel with a complex structure on the top of the gas chamber, and simplifies the measuring device of the gas chamber.
Preferably, the distance between the horizontal distance measuring device 205 and the outer edge of the piston stopper 203 is equal to the distance between the side plate 101 of the cylinder 1 and the outer edge of the piston stopper 203.
In fig. 1, D1 is the diameter of the inner wall of the gas holder side plate 101; d2 is the outer diameter of the piston holder 203 supporting the rubber membrane 3 in operation; w is the distance between the outer edge of the piston baffle frame 203 and the side plate 101; h1 is the piston stroke; h2 is the height of the piston stop frame; a is an air zone; g is the gas zone.
A gas chamber comprises a measuring system for measuring the horizontal clearance between a piston and a side plate, and the measuring system applies the measuring system for the horizontal clearance between the piston and the side plate of the gas chamber.
A method for measuring the horizontal clearance between a piston and a side plate of a gas chamber comprises the following steps: a horizontal distance measuring device 205 is arranged on the piston 2, the horizontal distance measuring device 205 comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston baffle frame 203, and a piston inclination measuring device 202 is arranged on a piston plate which is arranged on the upper side of the piston baffle frame 203 or is close to the inner side of the piston baffle frame 203; the horizontal distance measuring device 205 measures the horizontal distance between the piston 2 and the side plate 101 of the cylinder 1 and sends data of the horizontal distance to a control center of the gas holder, and the piston inclination measuring device 202 measures the inclination of the piston 2 and sends the inclination data to the control center of the gas holder; and the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with the standard distance after deducting the influence of the inclination, and sends out an alarm signal when the horizontal distance exceeds the standard distance.
Preferably, the piston inclination measuring device 202 includes a plurality of piston inclination measuring assemblies disposed on the same circumference concentric with the piston 2, the piston inclination measuring assemblies including two piston inclination measuring units disposed symmetrically about the piston axis; the horizontal distance measuring unit is arranged on a half circumference of the piston inclination measuring device, the horizontal distance measuring unit is positioned on the piston baffle frame top platform 204, and the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston 2.
Example 1
A kind of membrane seal gas chamber, refer to fig. 1-2, including cylinder 1 and piston 2 that sets up the up-and-down motion in the cylinder 1, and level interval measuring apparatus 205 and piston slope measuring apparatus 202 that couples to control center of the gas chamber, the piston 2 includes the piston body and sets up the piston block shelf 203 in the piston body peripheral; the piston inclination measuring device 202 comprises 6 piston inclination measuring units which are uniformly distributed relative to the center of the cylinder, and is arranged on one side of the upper side surface of the piston body, which is close to the piston baffle frame 203, namely fixed on the periphery of the piston plate 201 of the piston body; the horizontal distance measuring device 205 comprises 3 horizontal distance measuring units uniformly distributed on a semi-circle, and is arranged on the upper side of a piston baffle frame of a two-section type piston or the upper side of a piston baffle frame of a one-section type piston, namely on the upper side of a piston baffle frame top platform 204; when the horizontal distance measuring device 205 is arranged on the top platform of the piston blocking frame 203, the steel wire rope of the leveling device 104, the side plate vent hole 102 and the side plate manhole 103 are avoided; the detection signals of the piston inclination measuring device 202 and the horizontal distance measuring device 205 are sent to a control center for display, after the influence of the piston inclination is eliminated, the detection signals are compared with the set standard distance, and when the detection signals exceed the standard distance, the control center sends out an alarm signal to alarm.
The piston 2 of the membrane sealing gas chamber vertically moves up and down in the cylinder 1 of the gas chamber to realize gas absorption and delivery, and the inclination of the piston and the rotation of the piston in the horizontal direction are realized by the tension of a steel wire rope of a plurality of groups of mechanical piston leveling devices 104. The measurement of the piston inclination is realized by calculating the deviation of the piston inclination through adopting the liquid communicating pipe differential pressure or the piston height measuring point which are uniformly and symmetrically arranged in the circumferential direction of the gas holder. Since the sum of the distances between the diagonal positions is substantially constant when the piston 2 is not tilted, the clearance between the outer edge portion of the piston stopper 203 and the side plate 101 is 20mm when the inclination of the piston is 1 ‰, in the case where the piston stopper 203 is up to 20 m. Therefore, after eliminating the influence of the inclination of the piston, an operator can observe and determine the actual distance between the piston and the side plate 101 of the gas holder cylinder 1 in the horizontal direction, and judge whether the clearance between the piston 2 and the side plate 101 exceeds the standard or not.
Because the horizontal distance W between the piston 2 and the side plate 101 is ensured to be within a set value by multiple times of full-stroke reciprocating operation during debugging before the gas holder is put into production, the horizontal distance measuring device 205 can detect the horizontal eccentric operation condition of the piston 2 during the vertical operation by adopting half-cycle arrangement. And a data signal for measuring the distance between the piston and the side plate 101 of the gas holder cylinder 1 in the horizontal direction is transmitted to a person on duty to be displayed, and the data signal is compared with a set standard distance and early warned after the influence of the inclination of the piston is eliminated. By combining the piston inclination measurement data, the operation maintenance personnel can remotely monitor the operation condition of the giant field equipment, namely the gas tank. Therefore, the horizontal distance measuring device 205 is arranged in a semi-circle, which not only can achieve the purpose of monitoring the distance change between the piston 2 and the side plate 101, but also saves the investment and maintenance cost.
The interference of rubber seal membrane 3 should be avoided to horizontal distance measuring device 205's mounted position, and the interval that keeps off the frame 203 outside and curb plate 101 when the piston is 500mm, and horizontal distance measuring device 205 can be established to 1000mm with the distance of curb plate 101, because measurement accuracy requires to the millimeter level, under this kind of operating mode, chooses explosion-proof ultrasonic distance meter for use and has satisfied the requirement. The conventional wired transmission type explosion-proof ultrasonic distance measuring instrument is used for configuration estimation, and it is estimated that the investment of reducing 3 conventional explosion-proof ultrasonic distance measuring instruments in one gas cabinet of the embodiment can be saved by about 8 ten thousand yuan compared with adopting 6 explosion-proof ultrasonic distance measuring instruments. And the saved investment is higher under the conditions that a radar range finder or a range finder adopts wireless transmission equipment and the like.
The piston mass of the gas holder is generally hundreds of tons or even thousands of tons, after the gas holder is debugged, the eccentric operation of the piston is generally gradually accumulated due to the reasons such as the elongation of a steel wire rope of the piston leveling device 104, and the like, so the measurement of the horizontal distance between the piston 2 and the side plate 101 can be carried out discontinuously, if the wireless transmission technology is adopted to transmit the measurement data of the horizontal distance between the piston 2 and the side plate 101 to the outside of the gas holder, the number of cables descending from the holder top of the gas holder to the piston 2 is reduced, a cable take-up reel is not needed, and the problem of cable abrasion is not considered; in addition, because the horizontal distance between the piston 2 and the side plate 101 can be measured and monitored discontinuously, and the power consumption is small, the horizontal distance measuring device 205 can preferentially adopt a wireless transmission technology, so that the battery can be used for supplying power to avoid the cable from freely falling from the top of the cabinet to set a complex structure of a take-up reel, the accident caused by long-term abrasion of the cable can be avoided, and the battery can be replaced by a worker during regular inspection.
Example 2
Referring to fig. 3, unlike embodiment 1, a piston inclination measuring device 202 of this embodiment includes 4 piston inclination measuring units uniformly distributed with respect to the center of a cylinder, and a horizontal distance measuring device 205 includes 2 horizontal distance measuring units uniformly distributed over a half circumference.
The invention can timely warn the eccentric overrun operation of the gas chamber piston 2, ensure the operation safety of the gas chamber and realize the long-term safe and stable operation of the membrane sealing type gas chamber. The invention is applicable to the membrane sealing type gas tank with one-section or multi-section pistons, and can also be applied to other types of gas tanks needing to monitor the horizontal distance between the vertically lifting piston and the side plate.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a gas chamber piston and curb plate horizontal clearance measurement system, includes horizontal interval measuring device and piston slope measuring device that link to each other with the control center of gas chamber, its characterized in that: the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston baffle frame; the piston inclination measuring device measures the inclination of the piston and sends inclination data to the control center of the gas tank, the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with a standard distance after the influence of the inclination is deducted, and sends an alarm signal when the horizontal distance exceeds the standard distance.
2. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the piston inclination measuring device comprises a plurality of piston inclination measuring assemblies arranged on the piston, the piston inclination measuring assemblies are distributed on a concentric circle which is concentric with the piston and close to the inner side of the cylinder body of the gas chamber, and the piston inclination measuring assemblies comprise two piston inclination measuring units symmetrically arranged about the axis of the piston.
3. The system of claim 2, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston.
4. The system of claim 2, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the piston inclination measuring device is fixed on the piston baffle frame or a piston plate close to the inner side of the piston baffle frame.
5. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device is an explosion-proof ultrasonic distance meter.
6. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device is an explosion-proof ultrasonic distance meter with a wireless transmission function.
7. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device avoids the arrangement of a steel wire rope of the leveling device, a manhole of the side plate and a vent hole of the side plate in the circumferential direction of the gas chamber.
8. A gas holder, characterized in that: use of a piston to side plate horizontal clearance measurement system according to any of claims 1 to 7.
9. A method for measuring the horizontal clearance between a piston and a side plate of a gas chamber is characterized by comprising the following steps: a piston is provided with a horizontal distance measuring device, the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of a piston blocking frame, and a piston inclination measuring device is arranged on the piston blocking frame or a piston plate which is close to the inner side of the piston blocking frame; the piston inclination measuring device measures the inclination of the piston and sends the inclination data to the control center of the gas tank; and the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with the standard distance after deducting the influence of the inclination, and sends out an alarm signal when the horizontal distance exceeds the standard distance.
10. The method of claim 9, wherein the method comprises the following steps: the piston inclination measuring device comprises a plurality of piston inclination measuring assemblies which are arranged on the same circumference concentric with the piston, and each piston inclination measuring assembly comprises two piston inclination measuring units which are symmetrically arranged about the axis of the piston; the horizontal distance measuring unit is half of the number of the piston inclination measuring units, and the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston.
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| CN202010600920.2A CN111664817B (en) | 2020-06-28 | 2020-06-28 | Measuring system and measuring method for horizontal clearance between gas tank and piston and side plate |
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| CN202010600920.2A CN111664817B (en) | 2020-06-28 | 2020-06-28 | Measuring system and measuring method for horizontal clearance between gas tank and piston and side plate |
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| CN111664817B CN111664817B (en) | 2024-09-10 |
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