CN103216439A - Dynamic seal assembly of pumping mechanism and detecting system and detecting method of dynamic seal assembly - Google Patents
Dynamic seal assembly of pumping mechanism and detecting system and detecting method of dynamic seal assembly Download PDFInfo
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- CN103216439A CN103216439A CN2013101156309A CN201310115630A CN103216439A CN 103216439 A CN103216439 A CN 103216439A CN 2013101156309 A CN2013101156309 A CN 2013101156309A CN 201310115630 A CN201310115630 A CN 201310115630A CN 103216439 A CN103216439 A CN 103216439A
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Abstract
The invention discloses a dynamic seal assembly of a pumping mechanism and a detecting system and a detecting method of the dynamic seal assembly. The dynamic seal assembly of the pumping mechanism comprises a glasses plate and a cutting ring which are cooperatively used, wherein an annular contact surface is formed between the glasses plate and the cutting ring, and the glasses plate or the cutting ring is provided with a middle pressure detecting hole; a first port of the middle pressure detecting hole is positioned between an outer edge and an inner edge of the annular contact surface, and a second port is positioned on the outer surface of the glasses plate or the cutting ring. The pressure of a preset position of the dynamic seal assembly can be detected through the middle pressure detecting hole, then a pressure distribution function line of a liquid membrane in the radial direction of the annular contact surface can be obtained, the acting force of the liquid membrane on the cutting ring can be obtained, the stressing condition of the cutting ring can be accurately obtained, and a basis is provided for the optimal design of the sliding fit and the sealing fit between the cutting ring and the glasses plate.
Description
Technical field
The present invention relates to the technology of pumping mechanism, particularly a kind of dynamic sealing assembly of pumping mechanism also relates to a kind of detection system of this dynamic sealing assembly and the detecting method of this dynamic sealing assembly.
Background technique
Current, with pumping mechanism concrete, mud or other liquid product pumps are delivered to preposition usually.Pumping mechanism comprises one group of dynamic sealing assembly, and this dynamic sealing assembly comprises glasses plate and the cutting ring that is used.
As depicted in figs. 1 and 2, Fig. 1 is the cooperating structure schematic representation of glasses plate and cutting ring, and Fig. 2 is an A-A sectional structure schematic representation among Fig. 1.Glasses plate 10 forms two feeding holes, and cutting ring 20 is a ring structure, forms a feeding hole.One side slip of the end face of the input end of cutting ring 20 and glasses plate 10 is sealed and matched, and illustrates with double dot dash line among delivery pipe 30(Fig. 2 of output terminal connection).Cutting ring 20 can move back and forth at the X camber line shown in Fig. 1 (perhaps other tracks) with respect to glasses plate 10; When cutting ring 20 moves to right part (is reference with Fig. 1), the feeding hole of cutting ring 20 communicates with the feeding hole of glasses plate 10 right parts, and conveying this moment cylinder can make material flow in the delivery pipe 30 by the feeding hole of glasses plate 10 right part feeding holes, cutting ring 20; (with Fig. 1 is reference to move to left part in cutting ring 20, the position of the cutting ring 20 that is shown in broken lines) time, the feeding hole of cutting ring 20 communicates with the feeding hole of glasses plate 10 left parts, and this moment, another carried cylinder that material is flow in the delivery pipe 30 by the feeding hole of glasses plate 10 left part feeding holes, cutting ring 20.Like this, with predetermined pressure product pump is delivered to preposition by the to-and-fro motion of cutting ring 20.When cutting ring 20 is positioned at right part or left part, forms the hatching that with dashed lines forms among an annular contact surface S(Fig. 1 between the side of the end face of the input end of cutting ring 20 and glasses plate 10 and illustrate).This annular contact surface S can guarantee the sealing between glasses plate 10 and the cutting ring 20, avoids leaking from the annular contact surface S between cutting ring 20 and the glasses plate 10 by the material in the feeding hole.
Guarantee the pumping pressure of pumping mechanism, will guarantee being sealed and matched between cutting ring 20 and the glasses plate 10; Simultaneously, realize pumping, also will guarantee being slidingly matched between cutting ring 20 and the glasses plate 10.Therefore, for cutting ring 20 and glasses plate 10, will coordinate to be slidingly matched and to be sealed and matched.Being slidingly matched and being sealed and matched is a pair of contradiction, when guaranteeing to be slidingly matched, just need reduce the active force between the two, and then can influence the sealability between the two; On the contrary, when guaranteeing to be sealed and matched, just need to increase the active force between the two, will influence being slidingly matched between the two, cause wearing and tearing to be accelerated or/and the commutation driving force increases.
Current, mainly rule of thumb reach the parameter that the actual tests data are determined dynamic sealing assembly; This not only causes the cycle of obtaining of dynamic sealing assembly parameter very long, also can't really coordinate to be slidingly matched and to be sealed and matched, and perhaps can't guarantee being sealed and matched between the two, perhaps can't guarantee being slidingly matched between the two.Therefore, how coordinating being slidingly matched and being sealed and matched between cutting ring 20 and the glasses plate 10 better, is the technical barrier that current those skilled in the art need solve.
Summary of the invention
Based on the overall purpose of coordinating better between cutting ring and the glasses plate that is slidingly matched and is sealed and matched, first purpose of the present invention is, a kind of dynamic sealing assembly of pumping mechanism is provided, utilize this dynamic sealing assembly can obtain the stressing conditions of cutting ring more exactly, and then can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
Second purpose of the present invention is, a kind of detection system of dynamic sealing assembly of pumping mechanism is provided, utilize this detection system can obtain the stressing conditions of cutting ring more exactly, and then can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
The 3rd purpose of the present invention is, a kind of detecting method of dynamic sealing assembly of pumping mechanism is provided, utilize this method can obtain the stressing conditions of cutting ring more exactly, and then can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
The dynamic sealing assembly of pumping mechanism provided by the invention comprises glasses plate and the cutting ring that is used, and forms annular contact surface between described glasses plate and the cutting ring, at least one intermediate pressure is set on described glasses plate or the cutting ring detects the hole; Described intermediate pressure detects first port in hole between the outer edge and inside edge of described annular contact surface, and second port is positioned at the outer surface of described glasses plate or cutting ring.
Optionally, two described intermediate pressure are set at least on described glasses plate or the cutting ring and detect holes.
Optionally, distance is L1 between the inside edge of first port in a described intermediate pressure detection hole and described annular contact surface; Distance is L2 between first port in another described intermediate pressure detection hole and the inside edge of described annular contact surface; Described L1 is less than L2.
Optionally, described intermediate pressure is set and detects the hole on described glasses plate.
The detection system of the dynamic sealing assembly of pumping mechanism provided by the invention comprises the dynamic sealing assembly of above-mentioned any pumping mechanism, also comprises being used to detect the intermediate pressure sensor that described intermediate pressure detects liquid pressure in the hole.
Optionally, the detection system of the dynamic sealing assembly of described pumping mechanism also comprises fluid source, and described fluid source detects the hole by one-way valve and described intermediate pressure and is communicated with.
Optionally, the detection system of the dynamic sealing assembly of described pumping mechanism also comprises the pumping pressure transducer of the pumping pressure that detects pumping mechanism.
Optionally, the detection system of the dynamic sealing assembly of described pumping mechanism also comprises the controller that is electrically connected with intermediate pressure sensor and pumping pressure transducer respectively;
Described controller is used for carrying out predetermined policy according to the testing signal of the testing signal of intermediate pressure sensor, pumping pressure transducer;
Described predetermined policy is: according to the testing signal of pumping pressure transducer, the testing signal of intermediate pressure sensor, the pressure of the outer edge of predetermined described annular contact surface, described annular contact surface size and described intermediate pressure detect the position of first port in hole and adopt the curve fitting mode to obtain liquid film at annular contact surface pressure distribution function line in the radial direction; First active force that bears of the end face that obtains described cutting ring input end according to described pressure distribution function line and described annular contact surface size again.
Optionally, the detection system of the dynamic sealing assembly of described pumping mechanism also comprises the input device that is subjected to force parameter of the output terminal that is used to import described cutting ring; Described controller is electrically connected with described input device; Described controller also is used for second active force that end face that the testing signal that is subjected to force parameter and described pumping pressure transducer according to the input of described input device obtains described cutting ring output terminal bears.
Optionally, described controller also is used for being subjected to force parameter according to the ideal that described first active force and described pumping pressure obtain described cutting ring output terminal.
In the detecting method of the dynamic sealing assembly of pumping mechanism provided by the invention, the dynamic sealing assembly of described pumping mechanism is the dynamic sealing assembly of above-mentioned any pumping mechanism; This detecting method comprises the steps:
Detecting the position of first port in the pressure of the outer edge of the pressure in hole, predetermined described annular contact surface, described annular contact surface size and described pressure detection hole according to the pumping pressure of pumping mechanism, described intermediate pressure adopts the curve fitting mode to obtain liquid film at annular contact surface pressure distribution function line in the radial direction;
First active force that bears of the end face that obtains described cutting ring input end according to described pressure distribution function line and described annular contact surface size again.
Optionally, also comprise:
The ideal that obtains described cutting ring output terminal according to first active force and described pumping pressure is subjected to force parameter.
In the dynamic sealing assembly of pumping mechanism provided by the invention, comprise the glasses plate and the cutting ring that are used, form annular contact surface between described glasses plate and the cutting ring, described glasses plate or cutting ring are provided with at least one intermediate pressure and detect the hole; Described intermediate pressure detects first port in hole between the outer edge and inside edge of described annular contact surface, and second port is positioned at the outer surface of described glasses plate or cutting ring.Utilize this dynamic sealing assembly, can detect the pressure that precalculated position between annular contact surface outer edge and the inside edge is detected in the hole by intermediate pressure; Just can obtain liquid film at the annular contact surface pressure of at least three points in the radial direction in conjunction with the pumping pressure of pumping mechanism again; And then just can obtain liquid film by the mode of curve fitting at annular contact surface pressure distribution function line in the radial direction according to the pressure of these three points again, and then can obtain on annular contact surface liquid film more exactly to the active force of cutting ring, and then can obtain the stressing conditions of cutting ring more exactly, provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
In further technological scheme, two intermediate pressure are set on described glasses plate or the cutting ring at least detect holes.Can obtain the pressure of more a plurality of points on the annular contact surface like this; And then can make the pressure distribution function line of acquisition more accurate.
In further technological scheme, distance is L1 between first port in a described intermediate pressure detection hole and the inside edge of described annular contact surface; Distance is L2 between first port in another described intermediate pressure detection hole and the inside edge of described annular contact surface; Described L1 is less than L2.Like this, can make the point that obtains pressure more be evenly distributed in the radial direction of annular contact surface, the degree of accuracy that further improves the pressure distribution function line that obtains.
In further technological scheme, described intermediate pressure is set on described glasses plate detects the hole.In pumping mechanism, with respect to cutting ring, the glasses plate in the dynamic sealing assembly is a static part.Intermediate pressure is detected the hole be provided with on the glasses plate, can guarantee that the pressure that obtains is reliable more and stable, help improving the degree of accuracy of the pressure distribution function line of acquisition.
The detection system of the dynamic sealing assembly of pumping mechanism provided by the invention comprises above-mentioned dynamic sealing assembly and detects the intermediate pressure sensor that intermediate pressure detects liquid pressure in the hole.Owing to comprise above-mentioned dynamic sealing assembly, this detection system has corresponding technique effect, can obtain on annular contact surface liquid film more exactly to the active force of cutting ring, and then can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
In the detecting method of the dynamic sealing assembly of pumping mechanism provided by the invention, utilize the dynamic sealing assembly of above-mentioned pumping mechanism, can obtain the active force of liquid film more exactly, and then can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate to cutting ring.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.
Fig. 1 is the cooperating structure schematic representation of glasses plate and cutting ring;
Fig. 2 is an A-A sectional structure schematic representation among Fig. 1;
In the dynamic sealing assembly detection system of a kind of pumping mechanism that Fig. 3 provides for the embodiment of the invention, the sectional structure schematic representation of dynamic sealing assembly;
Fig. 4 is an I-I part enlarged view among Fig. 3, and this figure illustrates the control principle of detection system simultaneously;
Fig. 5 is the detecting method flow chart of the dynamic sealing assembly of the pumping mechanism that provides of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the present invention can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
The present invention is based on an overall purpose that is slidingly matched and is sealed and matched of coordinating better between cutting ring and the glasses plate proposes.The general thought that realizes this overall purpose is as follows:
In dynamic sealing assembly, glasses plate is static relatively parts, and cutting ring is the parts of relative movement.Coordinate being slidingly matched and being sealed and matched between cutting ring and the glasses plate, accurately obtain the stressing conditions of cutting ring.
When pumping mechanism carried out the pumping material, the liquid of material formed a liquid film between glasses plate and cutting ring.Refer again to Fig. 2, on centerline direction, the end face of the input end of cutting ring 20 is subjected to the reaction force F3 of the active force of liquid film (this active force is called first directed force F 1 in presents), glasses plate 10.The end face of the output terminal of cutting ring 20 is subjected to the active force (this active force is called second directed force F 2 in presents) of material in the delivery pipe 30; On centerline direction, cutting ring 20 realizes balance (ideal situation is: interact by liquid film between glasses plate and the cutting ring, directly do not produce contact, promptly reaction force F3 is zero) under three's effect.And in pumping material process, second directed force F 2 changes with the material pressure effect, and according to the delivery tube and the pumping position height difference of pumping mechanism, second directed force F, 2 excursions can be bigger; According to the stress balance principle, this will cause the reaction force of first directed force F 1 and glasses plate 10 also to have fluctuation.The pumping pressure of second directed force F 2 and pumping mechanism and the face area of output terminal are relevant, can obtain according to pumping pressure according to the operating mode difference.Therefore, obtain the stressing conditions of cutting ring 20 exactly, accurately obtaining first directed force F 1 becomes the key that realizes above-mentioned overall purpose.
Based on above-mentioned analysis, the embodiment of the invention provides the detecting method of the dynamic sealing assembly of the detection system of dynamic sealing assembly of dynamic sealing assembly, pumping mechanism of pumping mechanism and pumping mechanism.Technique scheme can obtain first directed force F 1 more exactly, and then can obtain the stressing conditions of cutting ring more exactly, and then can coordinate being slidingly matched and being sealed and matched between cutting ring and the glasses plate according to the stressing conditions of cutting ring.For the ease of public understanding, in following examples, cutting ring has adopted different reference characters to be described respectively with glasses plate.
Based on the detecting method of the dynamic sealing assembly of the detection system of the dynamic sealing assembly of the dynamic sealing assembly of pumping mechanism, pumping mechanism and pumping mechanism based on same working principle, and it is interrelated between the three, for the ease of public understanding, below when structure, principle and working procedure to the detection system of the dynamic sealing assembly of pumping mechanism are described, the detecting method of the dynamic sealing assembly of the dynamic sealing assembly of pumping mechanism and pumping mechanism is described; No longer the detecting method of the dynamic sealing assembly of the dynamic sealing assembly of pumping mechanism and pumping mechanism is described separately.Should be noted that: on behalf of the detecting method three of the dynamic sealing assembly of the detection system of dynamic sealing assembly of dynamic sealing assembly, pumping mechanism of pumping mechanism and pumping mechanism, the foregoing description mode to exist simultaneously.
In addition, also be necessary explanation: for the detection system of the dynamic sealing assembly of pumping mechanism, its testing goal is to determine in the pumping mechanism of a certain model, the coordination that is slidingly matched and is sealed and matched of dynamic sealing assembly, this detection system can comprise dynamic sealing assembly itself, after this detection system detection or adjusting size, the dynamic sealing assembly of corresponding size can be applied in the pumping mechanism of respective model.For dynamic sealing assembly, can be used for detection system and detecting method, also can in the pumping mechanism of reality, use.
Please refer to Fig. 3 and Fig. 4, in the dynamic sealing assembly detection system of a kind of pumping mechanism that Fig. 3 provides for the embodiment of the invention, the sectional structure schematic representation of dynamic sealing assembly; This figure is the sectional structure schematic representation of the dynamic sealing assembly of a kind of pumping mechanism of providing of the embodiment of the invention simultaneously; Fig. 4 is an I-I part enlarged view among Fig. 3, and this figure illustrates the control principle of detection system simultaneously.
The detection system of the dynamic sealing assembly of the pumping mechanism that the embodiment of the invention provides comprises dynamic sealing assembly and two intermediate pressure sensors 400 of a pumping mechanism.
Above-mentioned dynamic sealing assembly comprises glasses plate 100 and the cutting ring 200 that is used.Form annular contact surface S between glasses plate 100 and the cutting ring 200; Among Fig. 4, the B point has illustrated the inside edge of annular contact surface S, and the A point has illustrated the outer edge of annular contact surface S.In this example, annular contact surface S is a ring, and certainly, annular contact surface S also can be other shapes.
Two intermediate pressure sensors 400 can be used for detecting the pressure that intermediate pressure detects hole 300 liquid; The detection position of intermediate pressure sensor 400 can be positioned at second end that intermediate pressure detects hole 300, and can be with this second end sealing.Wherein, intermediate pressure sensor 410 detects the pressure that intermediate pressure detects the liquid in the hole 301, and intermediate pressure sensor 420 detects the pressure that intermediate pressure detects the liquid in the hole 302.
The working principle of said detecting system is:
Carry out in the pumping process at pumping mechanism, the liquid in the pumping material forms liquid film on annular contact surface S, and is full of intermediate pressure detection hole 300 by first port in intermediate pressure detection hole 300.For each intermediate pressure detected hole 300, the fluid that intermediate pressure detects in the hole 300 kept static substantially, and then the pressure of intermediate pressure detection hole 300 first port inner fluids equates substantially with the pressure that intermediate pressure detects hole 300 second port inner fluids.
Like this, intermediate pressure sensor 400 just can obtain the pressure that corresponding intermediate pressure detects hole 300 first port position by detecting the pressure that intermediate pressure detects liquid in the hole 300.Like this, just the pressure that C is ordered can be obtained, just the pressure that D is ordered can be obtained by intermediate pressure sensor 420 by intermediate pressure sensor 410.Be appreciated that the pressure that B is ordered equates substantially with the pumping pressure of pumping mechanism; The pressure that A is ordered can be a predetermined value, is positioned at annular contact surface S outer edge based on the A point, and can establish the pressure that A orders is 0.So just can obtain the annular contact surface S pressure of at least four points in the radial direction.
Please refer to Fig. 5, this figure is the detecting method flow chart of the dynamic sealing assembly of the pumping mechanism that provides of the embodiment of the invention, also can be based on the concrete processing mode of the pressure data of above-mentioned four points.
Step S100, pressure, annular contact surface S size and each pressure that detects the outer edge of the pressure in hole 300, predetermined annular contact surface S according to the pumping pressure of pumping mechanism, intermediate pressure detects the position of first port in hole 300, adopts the curve fitting mode to obtain liquid film at annular contact surface S pressure distribution function line in the radial direction.
Promptly according to the pressure and the position thereof of above-mentioned A, B, C, four points of D, the mode according to existing curve fitting just can obtain annular contact surface S pressure distribution function line in the radial direction again.In this example, owing to have the pressure of four points, the pressure distribution function line of acquisition is a pressure distribution curve.
Step S200 obtains first directed force F 1 that the end face of cutting ring 200 input ends bears according to pressure distribution function line and annular contact surface S size.
Can obtain the active force of liquid film more exactly according to the pressure distribution function line that obtains and existing calculating or processing mode (as integral way), promptly obtain first directed force F 1 cutting ring 200 input ends.So just can provide convenience for coordinating being slidingly matched and being sealed and matched between cutting ring and the glasses plate.
Be appreciated that annular contact surface S in the radial direction, the point that detects pressure is many more, and the pressure distribution function line and the actual pressure distribution situation of acquisition are approaching more, and first directed force F 1 of acquisition is accurate more.Under specific circumstances, above-mentioned dynamic sealing assembly also can be provided with an intermediate pressure and detect hole 300, and then obtains predetermined pressure distribution function line by three points.
Step S300 obtains second directed force F 2 that the end face of cutting ring 200 output terminals bears according to the pumping pressure of the size of the output terminal of cutting ring 200 and pumping mechanism.
Be subjected to force parameter and pumping pressure according to the output terminal of cutting ring 200 can obtain the active force of material to cutting ring 200 output terminals, i.e. second directed force F 2.The force parameter that is subjected to of the output terminal of cutting ring 200 can be the area of contact of output terminal and material.In the present embodiment, the position that F point and E are ordered among known Fig. 4, and then can determine the area that the end face of the output terminal of cutting ring 200 contacts with material, and then can obtain second directed force F 2.
Step S400 contrasts first directed force F 1 and second directed force F 2, judges whether the cooperation between cutting ring 200 and the glasses plate 100 satisfies pre-provisioning request.Specifically can be, also to be subjected to the effect of the reaction force F3 of glasses plate 10 if second directed force F, 2 big first directed force F 1 illustrate that under this operating mode, the input end of cutting ring 200 not only is subjected to the active force of liquid film.If the difference between second directed force F 2 and first directed force F 1 illustrates that greater than predetermined value reaction force F3 is excessive, then be unfavorable for keeping being slidingly matched of the two; If the difference between second directed force F 2 and first directed force F 1 is less than predetermined value, explanation is under this operating mode, (reaction force F3) is too small for active force between cutting ring 200 and the glasses plate 100, then is unfavorable for keeping the sealing between glasses plate 100 and the cutting ring 200.So just can according to the difference between first directed force F 1 and second directed force F 2 whether within predetermined scope, judge whether the cooperation between cutting ring 200 and the glasses plate 100 satisfies pre-provisioning request.
Step S500, the ideal that obtains cutting ring 200 output terminals according to first directed force F 1 and pumping pressure is subjected to force parameter.
In the time that pre-provisioning request can not be satisfied, can be subjected to force parameter according to the ideal of first directed force F 1 and pumping pressure acquisition cutting ring 200 output terminals.
According to above-mentioned principle and step, the ideal that can obtain cutting ring 200 output terminals is subjected to force parameter, and then the difference of first directed force F 1 and second directed force F 2 is remained within the prespecified range, the reaction force F3 of glasses plate 10 is remained within the prespecified range, coordinate being slidingly matched and being sealed and matched between cutting ring and the glasses plate, guarantee the works fine state of dynamic sealing assembly.Certainly, concrete processing mode is not limited to handle by above-mentioned steps, and as can be after obtaining first directed force F 1, the ideal that obtains cutting ring 200 output terminals according to first directed force F 1 and pumping pressure be subjected to force parameter; Ideal with cutting ring 200 output terminals is compared by force parameter and actual loading parameter again, whether satisfies pre-provisioning request to judge the cooperation between cutting ring 200 and the glasses plate 100.Be appreciated that the above-mentioned force parameter that is subjected to can be lifting surface area, outer diameter D 2 or the inside diameter D 1 of the end face of cutting ring 200 output terminals, or the like.
In a specific embodiment, inside edge diameter and the outer edge diameter of annular contact surface S are respectively 235mm and 282mm; The end face outer diameter D 2 of the output terminal of cutting ring 200 is 240mm, and inside diameter D 1 is that 235mm(is shown in Figure 3).Pumping pressure at pumping mechanism is under the operating mode of 35MPa, utilizes said detecting system to detect, and obtaining the pressure that C orders is 8MPa, and the pressure that D is ordered is 2.5MPa, and establishing the pressure that A orders is 0MPa.Carry out the pressure distribution function line that match obtains according to predetermined known function base; First directed force F 1 that can obtain between cutting ring 200 and the glasses plate 100 according to this pressure distribution function line and annular contact surface S is 10.5 tons again.According to D1, D2 and the pumping pressure of the output terminal of cutting ring 200, obtaining second directed force F 2 is 6.5 tons.At this moment, the reaction force F3 that can determine glasses plate 100 is 3.5 tons.So just can determine that it is excessive to rub between glasses plate 100 and the cutting ring 200, is unfavorable for being slidingly matched.Therefore, the ideal that can obtain cutting ring 200 output terminals according to first directed force F 1 and pumping pressure is subjected to force parameter; Specifically be when supposing that reaction force F3 is zero, to determine that according to first directed force F 1 the second desirable directed force F 2 is 10.5; Keeping under the constant situation of D1, can obtain D2 according to this second desirable directed force F 2 should 242.8mm; Therefore, D2 can be optimized, increase 2.8mm, the cutting ring after obtaining to optimize.
According to foregoing description, be appreciated that first directed force F 1 and second directed force F 2 all increase with the increase of pumping pressure, reducing and reduce with pumping pressure; Therefore, if when the pumping pressure change, the difference of first directed force F 1 and second directed force F 2 can remain within the predetermined scope, and reaction force F3 is remained within the predetermined scope, the matching relationship between assurance cutting ring 200 and the glasses plate 100.
Based on the foregoing description, when making the operating mode of above-mentioned pumping pressure 35MPa the operating mode of pumping pressure 5MPa into, use the cutting ring before optimizing, second directed force F 2 of Huo Deing is 0.93 ton according to the method described above, first directed force F 1 is 1.5 tons, and the difference of the two is 0.57 ton; Use the cutting ring after optimizing, first directed force F 1 of Huo Deing and second directed force F 2 are respectively 1.46 tons and 1.5 tons in the manner described above, and the difference of the two is 0.4 ton.Like this, under the less operating mode of pumping pressure, in the dynamic sealing assembly after the optimization, reaction force F3 is less relatively; So just can make reaction force F3 remain on predetermined more among a small circle within.In the optimal technical scheme, under the maximum pumping pressure operating mode of pumping mechanism, the ideal that obtains cutting ring 200 output terminals is subjected to force parameter, and be subjected to force parameter to determine the size or the relevant parameter of cutting ring 200 according to this ideal, specifically can be under the situation that cutting ring 200 input end end faces remain unchanged, determine the force parameter that is subjected to of cutting ring 200 output terminals, can also adjust the input end end face of cutting ring 200 and the relevant parameter of output terminal end face simultaneously.
Be appreciated that and utilize said detecting system and detecting method, can make dynamic sealing assembly obtain good performance, coordinate the relation that is slidingly matched and is sealed and matched by the preliminary dimension of adjusting cutting ring 200 two ends.
According to foregoing description, be appreciated that obtaining pumping pressure can utilize the relevant device of pumping mechanism to obtain; Such as, can obtain according to the parameter of the conveying cylinder of pumping mechanism, the parameter that drives the oil hydraulic cylinder of carrying the cylinder motion.In the embodiment of the invention, said detecting system can also comprise the pumping pressure transducer 500 of the pumping pressure that detects pumping mechanism.Utilize this pumping pressure transducer 500 can obtain pumping pressure.The detection position of pumping pressure transducer 500 can be positioned at suitable position, in delivery pipe or conveying cylinder.Please refer to Fig. 4, in the present embodiment, the detection position of pumping pressure transducer 500 is positioned on the internal face of feeding hole of glasses plate 100, and the pressure that pumping pressure that pumping pressure transducer 500 obtains and B orders is more approaching, the accurate reliability of raising detection.
Each step of above-mentioned detecting method can be handled by other equipment and device, also can handle by the part of detection system own.Please refer to Fig. 4, in the foregoing description, detection system can also comprise controller 600.This controller 600 can be electrically connected with intermediate pressure sensor 400 and pumping pressure transducer 500 respectively.This controller 600 is used for obtaining first directed force F 1 that the end face of cutting ring 200 input ends bears according to the testing signal of intermediate pressure sensor 400, pumping pressure transducer 500 and predetermined policy.
Above-mentioned predetermined policy can for: according to the testing signal of pumping pressure transducer 500, the testing signal of intermediate pressure sensor 400, the pressure of the outer edge of predetermined annular contact surface S, annular contact surface S size and pressure detect the position of first port in hole 300 and adopt the curve fitting mode to obtain liquid film at annular contact surface S pressure distribution function line in the radial direction; Obtain first directed force F 1 that the end face of cutting ring 200 input ends bears according to this pressure distribution function line and annular contact surface S size again.Its principle repeats no more as mentioned above.
In order to obtain among 2, one embodiments of second directed force F, detection system can also comprise the input device that is subjected to force parameter 700 of the output terminal that is used to import cutting ring 200; And controller 600 is electrically connected with input device 700; Like this, controller 600 can also be used for second directed force F 2 that end face that the testing signal that is subjected to force parameter and pumping pressure transducer 500 according to input device 700 input obtains cutting ring 200 output terminals bears.
In addition, controller 600 can also contrast first directed force F 1 and second directed force F 2, judge whether the cooperation between cutting ring 200 and the glasses plate 100 satisfies pre-provisioning request, perhaps can be subjected to force parameter according to the ideal of first directed force F 1 and pumping pressure acquisition cutting ring 200 output terminals, or the like.
Please refer to Fig. 4, detection system can also comprise the output unit 800 that is electrically connected with controller 600, and the data output that output unit 800 can obtain controller 600 is so that to the utilization of output data.
Be appreciated that since cutting ring 200 with respect to glasses plate 100 to-and-fro motion, when intermediate pressure sensor 400 detected predetermined intermediate pressure and detects in the hole 300 hydraulic pressure body pressure, the foundation that intermediate pressure detects hole 300 interior liquid pressures needed preset time; Set up speed in order to improve intermediate pressure detection hole 300 interior liquid pressures, improve the accurate reliability that pressure detects.In the foregoing description, detection system can also comprise fluid source, and this fluid source is communicated with by one-way valve and each intermediate pressure detection hole 300.Intermediate pressure suitably is set detects the aperture in hole 300 or the through-flow diameter of first port, can when first port communicates with the external world, have less external flux; When first port seals owing to cutting ring 200 cooperates with glasses plate 100, can set up pressure quickly.Make fluid source detect hole 300 and be communicated with, can avoid because the increase of pumping pressure makes intermediate pressure detect the flow direction fluid source in hole 300 by one-way valve and each intermediate pressure.Fluid source can be accumulator or fluid pump, and the fluid of predetermined pressure can outwards be provided.
For dynamic sealing assembly, glasses plate 100 can be provided with more a plurality of intermediate pressure and detect hole 300.In order to obtain pressure accurately, can make a plurality of intermediate pressure detect the hoop direction distribution of hole 300 along annular contact surface S; Can make a plurality of intermediate pressure detect hole 300 equates with the outer edge of annular contact surface S or the distance of inside edge, like this, obtaining annular contact surface S radially during the pressure in precalculated position, can with detect based on these a plurality of intermediate pressure hole 300 obtain a plurality of pressure average, get in or other handle, with the pressure in the precalculated position that guarantees to obtain accurately and reliably.
Be appreciated that respective sensor is not limited to link to each other with controller 600, the detection data that respective sensor obtains also can be exported by suitable mode, and by other devices or device processes.
In the foregoing description, distance is L1 between first port in intermediate pressure detection hole 301 and the inside edge of annular contact surface S; Distance is L2 between first port in intermediate pressure detection hole 302 and the inside edge of annular contact surface S; And L1 is 1/3 of an annular contact surface S width; L2 is 2/3 of an annular contact surface S width; Like this, C point and the D distance of naming a person for a particular job between A point and the B point is divided into three parts.Intermediate pressure detects hole 301 and intermediate pressure detection hole 302 also is not limited to arrange in a manner described, also can arrange (as making L1) according to other modes less than L2, under the situation that can determine C point and D point position, just can carry out match, obtain pressure distribution function line according to known mode.
In pumping mechanism, with respect to cutting ring, the glasses plate in the dynamic sealing assembly is a static part.In the foregoing description, intermediate pressure is detected the hole be provided with on the glasses plate, can guarantee that like this pressure that obtains is reliable more and stable, more help improving the degree of accuracy of the pressure distribution function line of acquisition.Be appreciated that under specific circumstances, also can detect hole 300 on cutting ring 200, detect the pressure that hole 300 also can obtain the precalculated position by the intermediate pressure that detects on the cutting ring 200 with intermediate pressure is set.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the dynamic sealing assembly of a pumping mechanism, comprise the glasses plate (100) and the cutting ring (200) that are used, form annular contact surface (S) between described glasses plate (100) and the cutting ring (200), it is characterized in that, at least one intermediate pressure is set on described glasses plate (100) or the cutting ring (200) detects hole (300); First port that described intermediate pressure detects hole (300) is positioned between the outer edge and inside edge of described annular contact surface (S), and second port is positioned at the outer surface of described glasses plate (100) or cutting ring (200).
2. the dynamic sealing assembly of pumping mechanism according to claim 1 is characterized in that, two described intermediate pressure is set on described glasses plate (100) or the cutting ring (200) at least detects hole (300).
3. the dynamic sealing assembly of pumping mechanism according to claim 2 is characterized in that, distance is L1 between first port in a described intermediate pressure detection hole (300) and the inside edge of described annular contact surface (S); Distance is L2 between first port in another described intermediate pressure detection hole (300) and the inside edge of described annular contact surface (S); Described L1 is less than L2.
4. according to the dynamic sealing assembly of claim 1,2 or 3 described pumping mechanisms, it is characterized in that, described intermediate pressure is set on described glasses plate (100) detects hole (300).
5. the detection system of the dynamic sealing assembly of a pumping mechanism, it is characterized in that, the dynamic sealing assembly that comprises each described pumping mechanism of claim 1 to 4 also comprises being used to detect the intermediate pressure sensor (400) that described intermediate pressure detects the interior liquid pressure in hole (300).
6. the detection system of the dynamic sealing assembly of pumping mechanism according to claim 5 is characterized in that, also comprises fluid source, and described fluid source detects hole (300) by one-way valve and described intermediate pressure and is communicated with.
7. the detection system of the dynamic sealing assembly of pumping mechanism according to claim 5 is characterized in that, also comprises the pumping pressure transducer (500) of the pumping pressure that detects pumping mechanism.
8. the detection system of the dynamic sealing assembly of pumping mechanism according to claim 7 is characterized in that, also comprises the controller (600) that is electrically connected with intermediate pressure sensor (400) and pumping pressure transducer (500) respectively;
Described controller (600) is used for the testing signal according to intermediate pressure sensor (400), the testing signal of pumping pressure transducer (500) is carried out predetermined policy;
Described predetermined policy is: according to the testing signal of pumping pressure transducer (500), the testing signal of intermediate pressure sensor (400), the pressure of the outer edge of predetermined described annular contact surface (S), described annular contact surface (S) size and described intermediate pressure detect the position of first port in hole (300) and adopt the curve fitting mode to obtain liquid film at annular contact surface (S) pressure distribution function line in the radial direction; Obtain first active force (F1) that the end face of described cutting ring (200) input end bears according to described pressure distribution function line and described annular contact surface (S) size again.
9. the detection system of the dynamic sealing assembly of pumping mechanism according to claim 8 is characterized in that, also comprises the input device that is subjected to force parameter (700) of the output terminal that is used to import described cutting ring (200); Described controller (600) is electrically connected with described input device (700); Described controller (600) also is used for second active force (F2) that end face that the testing signal that is subjected to force parameter and described pumping pressure transducer (500) according to described input device (700) input obtains described cutting ring (200) output terminal bears.
10. the detection system of the dynamic sealing assembly of pumping mechanism according to claim 8, it is characterized in that the ideal that described controller (600) also is used for obtaining according to described first active force (F1) and described pumping pressure described cutting ring (200) output terminal is subjected to force parameter.
11. the detecting method of the dynamic sealing assembly of a pumping mechanism is characterized in that, the dynamic sealing assembly of described pumping mechanism is the dynamic sealing assembly of each described pumping mechanism of claim 1 to 4;
This detecting method comprises the steps:
Pressure, described annular contact surface (S) size and the described pressure of outer edge that detects pressure, the predetermined described annular contact surface (S) in hole (300) according to the pumping pressure of pumping mechanism, described intermediate pressure detects the position of first port in hole (300) and adopts the curve fitting mode to obtain liquid film at annular contact surface (S) pressure distribution function line in the radial direction;
Obtain first active force (F1) that the end face of described cutting ring (200) input end bears according to described pressure distribution function line and described annular contact surface (S) size again.
12. the detecting method according to the dynamic sealing assembly of the described pumping mechanism of claim 11 is characterized in that,
Also comprise:
The ideal that obtains described cutting ring (200) output terminal according to first active force (F1) and described pumping pressure is subjected to force parameter.
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| CN201310115630.9A CN103216439B (en) | 2013-04-03 | 2013-04-03 | The dynamic sealing assembly of pumping mechanism, the detection system of this dynamic sealing assembly and detecting method |
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| CN203214303U (en) * | 2013-04-03 | 2013-09-25 | 三一重工股份有限公司 | Motive seal assembly of pumping mechanism and detecting system of motive seal assembly |
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| EP0052192A1 (en) * | 1980-11-14 | 1982-05-26 | Stetter GmbH | Apparatus for concrete pumps |
| CN86106617A (en) * | 1985-10-21 | 1987-06-10 | 博格-华纳工业制品公司 | The adaptive control system of mechanical seal device |
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| CN103216439B (en) | 2015-12-23 |
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