CN112924094A - Dynamic seal experimental equipment - Google Patents
Dynamic seal experimental equipment Download PDFInfo
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- CN112924094A CN112924094A CN202110099314.1A CN202110099314A CN112924094A CN 112924094 A CN112924094 A CN 112924094A CN 202110099314 A CN202110099314 A CN 202110099314A CN 112924094 A CN112924094 A CN 112924094A
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- dynamic seal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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Abstract
The invention relates to the technical field of mechanical testing, in particular to dynamic seal experimental equipment. The dynamic seal experimental equipment comprises a mechanical operation device and an electromagnetic heating device, the mechanical operation device comprises a shell, a bearing and a rotating shaft, a cavity is limited by the shell, the shell is provided with a first end and a second end which are opposite in the axial direction of the shell, the second end of the shell is opened, the bearing is arranged in the cavity, the rotating shaft is rotatably arranged in the cavity through the bearing, a plurality of first installation parts used for installing dynamic seal static parts are arranged on the shell, the first installation parts are spaced in the axial direction of the shell, and a second installation part used for installing dynamic seal rotating parts is arranged on the rotating shaft. The electromagnetic heating device comprises a heating coil for heating at least one of the dynamic seal static part and the dynamic seal rotating part. The dynamic seal experimental equipment provided by the embodiment of the invention has the advantages of low cost of a mechanical operation device, high strength, small potential safety hazard in the experimental process, high reliability of experimental results and the like.
Description
Technical Field
The invention relates to the technical field of mechanical testing, in particular to dynamic seal experimental equipment.
Background
The high-temperature dynamic sealing structure is one of key technologies of a control surface of a hypersonic aircraft, and plays an important role in safe operation of the aircraft. The current high-temperature dynamic sealing technology mainly comprises the following steps: packing seals, labyrinth seals, dry gas seals, brush seals, fingertip seals, and the like. The dynamic seal structure is composed of a dynamic seal assembly, the dynamic seal assembly comprises a dynamic seal static part and a dynamic seal rotating part, and the dynamic seal rotating part can rotate relative to the dynamic seal static part. In designing a dynamic seal, it is important to evaluate the performance of the dynamic seal assembly, for example, frictional wear performance, leakage amount, and the like, and therefore, in addition to theoretical studies, necessary experimental verification is also important.
Mechanical operation device of dynamic seal experimental facilities among the correlation technique includes casing and axis of rotation, and the cavity is injectd to the casing, and the axis of rotation passes through the bearing and rotationally installs in the cavity, the static piece of dynamic seal with the casing links to each other, and the dynamic seal rotates the piece with the axis of rotation links to each other, and high-temperature gas lets in the inside of this cavity, utilizes this high-temperature gas to give the heating of dynamic seal subassembly, makes dynamic seal subassembly reach the experimental temperature of settlement. The problems that the dynamic seal experiment equipment is high in cost, low in strength and large in potential safety hazard and the dynamic seal assembly is difficult to reach the set temperature exist.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides dynamic seal experimental equipment with high heating efficiency.
The dynamic seal experimental equipment provided by the embodiment of the invention comprises: the mechanical operation device comprises a shell, a bearing and a rotating shaft, wherein the shell defines a cavity, the shell is provided with a first end and a second end which are opposite in the axial direction of the shell, the second end of the shell is open, the bearing is arranged in the cavity, the rotating shaft is rotatably arranged in the cavity through the bearing, the shell is provided with a plurality of first installation parts for installing static dynamic sealing parts, the first installation parts are spaced in the axial direction of the shell, and the rotating shaft is provided with a second installation part for installing dynamic sealing rotating parts;
an electromagnetic heating device including a heating coil for heating at least one of the moving seal stationary member and the moving seal rotating member.
The dynamic seal experimental equipment provided by the embodiment of the invention has the advantages of low cost of a mechanical operation device, high strength, small potential safety hazard in the experimental process, high reliability of experimental results and the like.
In some embodiments, the heating coil is disposed adjacent to at least one of the first mounting portion and the second mounting portion in an axial direction of the housing.
In some embodiments, the heating coil is spaced apart from an inner circumferential surface of the case in an inward and outward direction.
In some embodiments, the electromagnetic heating device further comprises a frequency converter, and the heating coil is connected with the frequency converter through a lead wire.
In some embodiments, the mechanical operating device further comprises an annular first transition piece detachably connected to the housing by a first fastener, the first mounting portion being provided on the first transition piece;
an insulating coating is arranged on at least one of the shell and the first transition connecting piece;
an insulating gasket is sleeved on the first fastener;
and the rolling bodies of the bearing are made of insulating materials.
In some embodiments, the mechanical operating device further comprises a second transition piece detachably connected to the rotating shaft by a second fastener, and the second mounting portion is provided on the second transition piece.
In some embodiments, the housing is provided with a cooling gas inlet for the cooling gas to enter and a cooling gas outlet for the cooling gas to flow out.
In some embodiments, the bearing is provided in plurality, a partition is provided in the housing, at least one of the bearings is connected to the partition, the partition is spaced apart from the second transition piece in the axial direction of the housing, a vent hole is provided in the partition, the vent hole corresponds to the second transition piece in the axial direction of the housing, the partition is located between the cooling gas inlet and the cooling gas outlet in the axial direction of the housing, and the cooling gas outlet is located between the partition and the second transition piece in the axial direction of the housing.
In some embodiments, there are two first mounting portions, and the two first mounting portions are symmetrically arranged.
In some embodiments, further comprising an experimental platform and a motor, each of the mechanical operating device and the motor being mounted on the experimental platform.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic seal experimental apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another view of a dynamic seal experimental facility according to an embodiment of the present invention.
Fig. 3 is a schematic view of the mechanical operation device and the electromagnetic heating device in fig. 1.
Fig. 4 is an enlarged view at a in fig. 3.
Fig. 5 is an enlarged view at B in fig. 3.
Reference numerals: a dynamic seal test apparatus 1000;
a machine running device 100; a housing 1; a first end 101; a second end 102; a chamber 103; a first transition piece 104; a first mounting portion 1041; a screw 105; a cooling gas inlet 106; a cooling gas outlet 107; a high pressure gas inlet 108; a main body 109; a rotating shaft 2; a second transition piece 201; a second mounting portion 2011; a key 2012; a catch ring 2013; a screw 2014; a first bushing 202; a second bushing 203; a dynamic seal static part 3; a dynamic seal rotating member 4; a seal ring 401; a partition 5; a vent 501; a screw 502; a first end cap 6; a screw 601; a second end cap 7; a screw 701; a bearing 8; a first bearing 801; a second bearing 802; a pre-tensioned spring 8021; a spring seat 8022; a third bearing 803; a coupling sleeve 9; screws 901; a key 902; a first bearing end cap 1001; a screw 10011; a second bearing end cap 1002; a screw 10021; a first slinger 1003; screw 10031; a second oil slinger 1004;
an electromagnetic heating device 200; a heating coil 2001; a sealed end cap 2002; a frequency converter 2003;
a motor 300; an output shaft 3001; a screw 30011;
a high pressure gas source 400; a gas duct 4001;
an experimental platform 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 5, a dynamic seal test apparatus 1000 according to an embodiment of the present invention includes a mechanical operating device 100 and an electromagnetic heating device 200. The mechanical operating device 100 includes a housing 1, a bearing 8, and a rotating shaft 2, the housing 1 defining a chamber 103. The housing 1 has a first end 101 and a second end 102 opposite in the axial direction thereof, and the second end 102 of the housing 1 is open. A bearing 8 is provided in the chamber 103, and the rotating shaft 2 is rotatably mounted in the chamber 103 through the bearing 8. The casing 1 is provided with a plurality of first installation parts 1041 for installing the dynamic seal static part 3, the first installation parts 1041 are spaced in the axial direction of the casing 1, and the rotating shaft 2 is provided with a second installation part 2011 for installing the dynamic seal rotating part 4.
The electromagnetic heating device 200 includes a heating coil 2001 for heating at least one of the moving seal stationary member 3 and the moving seal rotating member 4.
Heating at least one of the dynamic seal static part 3 and the dynamic seal rotating part 4 is that: the stationary moving seal member 3 is heated, or the rotating moving seal member 4 is heated, or each of the stationary moving seal member 3 and the rotating moving seal member 4 is heated. As will be appreciated by those skilled in the art: even if only the static dynamic seal member 3 is heated, the static dynamic seal member 3 can quickly transfer part of the heat to the rotating dynamic seal member 4 which is in sealing fit with the static dynamic seal member 3, so that the rotating dynamic seal member 4 has higher temperature. Accordingly, even if only the dynamic seal rotating member 4 is heated, the dynamic seal rotating member 4 can rapidly transfer part of the heat to the dynamic seal stationary member 3 which is in sealing engagement with the dynamic seal rotating member 4, so that the dynamic seal stationary member 3 has a higher temperature.
In the related art, the dynamic seal experimental equipment heats the dynamic seal assembly in the mechanical operation device by using high-temperature gas, and on one hand, the dynamic seal assembly is difficult to heat to a set temperature in a short time due to a certain leakage amount of the high-temperature gas. And the high-temperature gas is heated by a heating furnace, the heating efficiency of the heating furnace to the gas is limited, and the high-temperature gas with continuous and constant temperature is difficult to be provided for the mechanical operation device, so that the dynamic sealing assembly is difficult to reach the set temperature. On the other hand, because the high-temperature gas flees in the mechanical operation device, the temperature of each part in the mechanical operation device is high, and the parts are difficult to cool, so that a plurality of parts of the mechanical operation device need to be made of high-temperature resistant materials, and the cost of the dynamic seal experimental equipment is high. Also, excessive temperatures can affect the strength of some critical components, resulting in poor mechanical workings. In addition, the temperature of the shell of the mechanical operation device is too high, and the potential safety hazard of scalding of personnel is also great.
The dynamic seal testing apparatus 1000 according to the embodiment of the present invention heats at least one of the dynamic seal stationary member 3 and the dynamic seal rotary member 4 using the heating coil 2001 of the electromagnetic heating device 200 to bring each of the dynamic seal stationary member 3 and the dynamic seal rotary member 4 to a set test temperature.
On the one hand, the heating regions of the electromagnetic heating are concentrated, and the temperature of other parts of the mechanical operation device 100 can be effectively avoided from being too high, so that fewer high-temperature-resistant materials can be used, the cost of the dynamic seal experimental equipment 1000 is reduced, and the strength of the mechanical operation device 100 can be improved. In addition, the temperature of the casing 1 of the mechanical operation device 100 is not excessively high, which is advantageous to reduce the potential safety hazard. On the other hand, electromagnetic heating's heating efficiency is high, can heat dynamic seal subassembly to the settlement temperature in the short time to rapid compensation is because the heat that gas leakage took away, makes dynamic seal subassembly keep at the settlement temperature, thereby improves the reliability of experimental result.
Therefore, the dynamic seal experimental equipment 1000 according to the embodiment of the invention has the advantages of low cost, high strength, small potential safety hazard in the experimental process, high reliability of experimental results and the like of the mechanical operation device 100.
As shown in fig. 1 to 5, a dynamic seal test apparatus 1000 according to an embodiment of the present invention includes a mechanical operating device 100 and an electromagnetic heating device 200.
As shown in fig. 3 to 5, the mechanical running device 100 includes a housing 1, a bearing 8, and a rotating shaft 2. The housing 1 includes a main body 109, a first end cap 6 and a second end cap 7, the axial direction of the housing 1 is consistent with the left-right direction, the main body 109 has a first end (left end) and a second end (right end) opposite to each other in the axial direction, the first end cap 6 is arranged at the left end of the main body 109, and the first end cap 6 is in positioning fit with the left end of the main body 109 through a straight opening and is connected with the main body 109 through a screw 601. The second end cover 7 is arranged at the right end of the main body 109, and the second end cover 7 is in positioning fit with the right end of the main body 109 through a straight opening and is connected with the main body 109 through a screw 701. The body 109, first end cap 6 and second end cap 7 define a chamber 103. Wherein the left-right direction is indicated by arrow C in fig. 3.
As shown in fig. 3, a bearing 8 is provided in the chamber 103, and the rotating shaft 2 is rotatably mounted in the chamber 103 through the bearing 8.
In some embodiments, the dynamic seal testing apparatus 1000 further comprises a testing platform 500 and a motor 300, each of the mechanical operating device 100 and the motor 300 being mounted on the testing platform 500. The motor 300 includes an output shaft 3001, the left end of the rotating shaft 2 is suspended, and the output shaft 3001 is connected with the left end of the rotating shaft 2 through a coupling sleeve 9, so that the motor 300 is used to drive the rotating shaft 2 to rotate. Specifically, as shown in fig. 3 and 5, the output shaft 3001 is connected to the boss 9 with a screw 30011, the boss 9 is positioned on the rotating shaft 2 by a key 902 for rotation stop, and the boss 9 is connected to the rotating shaft 2 with a screw 901.
As shown in fig. 3 and 4, the housing 1 is provided with a plurality of first mounting portions 1041 for mounting the dynamic seal static component 3, and the plurality of first mounting portions 1041 are spaced apart in the axial direction of the housing 1. The rotating shaft 2 is provided with a second mounting portion 2011 for mounting the dynamic seal rotor 4. During the experiment, the static piece 3 of dynamic seal is installed on first installation department 1041, and the static piece 3 of dynamic seal is static motionless for casing 1. The dynamic seal rotating member 4 is mounted on the second mounting portion 2011, and the rotational shaft 2 is used to drive the dynamic seal rotating member 4 to rotate.
In some embodiments, as shown in fig. 3, two first mounting portions 1041 are provided, and the two first mounting portions 1041 are symmetrically arranged. The housing 1 is provided with a high-pressure gas inlet 108, and the high-pressure gas inlet 108 is located between the two first mounting portions 1041 in the axial direction of the housing 1. The high pressure gas source 400 is connected to the high pressure gas inlet 108 via a gas line 4001.
During the experiment, install the stationary dynamic seal part 3 respectively on two first installation departments 1041, the stationary dynamic seal part 3 on left side is as the auxiliary member, the stationary dynamic seal part 3 on right side is as the experimental member, utilizes high-pressure gas source 400 to let in high-pressure gas between two stationary dynamic seal parts 3. For example, two identical brush rings are mounted on the two first mounting portions 1041, and each brush ring is mounted on the first mounting portion 1041 through a brush ring holder. The high-pressure gas introduced from the high-pressure gas inlet 108 is enclosed between the two dynamic seal static members 3. Two first installation department 1041 symmetrical arrangement to the same dynamic seal static piece 3 of installation during the experiment on two first installation departments 1041, from this, can avoid two dynamic seal static pieces 3 to produce pressure differential in the axial of casing 1, thereby avoid producing the axial force because of this pressure differential in the axis of rotation 2, and then be favorable to improving the experiment precision. Further, by mounting the same stationary dynamic seal member 3 to the two first mounting portions 1041, the friction coefficient of the stationary dynamic seal member 3 as a test piece can be obtained.
As shown in fig. 3, the housing 1 has a first end 101 (left end) and a second end 102 (right end) opposite in the axial direction thereof, the second end 102 of the housing 1 being open. The electromagnetic heating device 200 comprises a sealing end cap 2002, wherein the sealing end cap 2002 is arranged at the second end 102 of the shell 1 and covers the second end 102 of the shell 1. Therefore, when the dynamic seal static part 3 and the dynamic seal rotating part 4 are in sealing fit in the experimental process, the shell 1, the dynamic seal static part 3, the dynamic seal rotating part 4 and the sealing end cover 2002 form a closed chamber, and the gas leakage amount between the dynamic seal static part 3 and the dynamic seal rotating part 4 can be detected in the closed chamber.
The electromagnetic heating device 200 includes a heating coil 2001 for heating at least one of the moving seal stationary member 3 and the moving seal rotating member 4. Specifically, when the heating coil 2001 is supplied with an alternating current, an induced current can be generated in at least one of the moving seal stationary member 3 and the moving seal rotating member 4, thereby heating the surface of the corresponding member. For example, as shown in fig. 3, a heating coil 2001 corresponds to each of the stationary seal member 3 and the rotating seal member 4 in the axial direction of the housing 1, and when an alternating current is applied to the heating coil 2001, each of the stationary seal member 3 and the rotating seal member 4 generates an induced current, thereby heating each of the stationary seal member 3 and the rotating seal member 4 with the heating coil 2001.
In some embodiments, as shown in fig. 1 and 2, the electromagnetic heating apparatus 200 further includes a high-cycle frequency converter 2003, and the heating coil 2001 is connected to the frequency converter 2003 through a wire. Thus, the inverter 2003 effectively improves the heating efficiency of the electromagnetic heating device 200, and is further advantageous for maintaining the movable sealing member at the set temperature, thereby further improving the reliability of the experimental result.
When the electromagnetic heating device 200 is used specifically, an industrial power supply is used as an induction power supply, a frequency converter 2003 converts the frequency of the industrial power supply to generate a high-frequency voltage, the high-frequency voltage is connected to a heating coil 2001, a high-frequency alternating current is used for generating an alternating magnetic field, and then an induced current is generated on at least one of the movable seal stationary member 3 and the movable seal rotating member 4.
In some embodiments, as shown in fig. 3, the heating coil 2001 is disposed adjacent to at least one of the first mounting portion 1041 and the second mounting portion 2011 in the axial direction of the housing 1. Therefore, the electromagnetic heating device 200 can be effectively utilized to heat the corresponding one of the dynamic seal static part 3 and the dynamic seal rotating part 4, and the dynamic seal assembly is further favorably kept at the set temperature, so that the reliability of the experimental result is further improved.
In some embodiments, as shown in fig. 3, the heating coil 2001 is spaced apart from the inner circumferential surface of the case 1 in the inward and outward direction. The inner peripheral surface of the housing 1 is adjacent to the rotating shaft 2 in the inward and outward direction with respect to the outer peripheral surface of the housing 1, as indicated by an arrow D in fig. 3. Therefore, when the heating coil 2001 is supplied with alternating current, the shell 1 is prevented from being heated due to induced current, and the temperature of the shell 1 is further prevented from being too high, so that potential safety hazards caused by the fact that the temperature of the shell 1 is too high are further reduced.
In some embodiments, as shown in fig. 3, the mechanical operating device 100 further includes a first annular transition piece 104, the first transition piece 104 is detachably connected to the housing 1 by a first fastener, and the first mounting portion 1041 is provided on the first transition piece 104. The first fastener may be a screw 105.
Preferably, at least one of the housing 1 and the first transition piece 104 is provided with an insulating coating. An insulating gasket is sleeved on the first fastener. The rolling bodies of the bearing are made of insulating materials. For example, a ceramic coating is provided on one of the housing 1 and the first transition piece 104, and the rolling elements of the bearing are made of a ceramic material.
Providing an insulating coating on at least one of the housing 1 and the first transition piece 104 means: an insulating coating is provided on the housing 1, or an insulating coating is provided on the first transition piece 104, or an insulating coating is provided on each of the housing 1 and the first transition piece 104. Thus, the housing 1 and the first transition piece 104 are not electrically conductive through surface contact. The first fastening member is sleeved with an insulating gasket, so that the housing 1 and the first transition piece 104 are not electrically conducted through the first fastening member.
The rolling elements of the bearing are made of an insulating material so that there is no electrical conduction between the rotating shaft 2 and the housing 1. And the shell 1 and the first transition piece 104 are not conductive, and the rotating shaft 2 and the shell 1 are not conductive, so that when the dynamic seal assembly is heated by the heating coil 2001, the induced current is limited on the dynamic seal assembly and the rotating shaft 2, and the adverse effect on the whole device is avoided.
In some embodiments, as shown in fig. 3, the mechanical operating device 100 further includes a second transition piece 201, the second transition piece 201 is detachably connected to the rotating shaft 2 by a second fastener, and a second mounting portion 2011 is provided on the second transition piece 201. The second fastener may be a screw 2014.
Specifically, the second transition piece 201 is annular, the second transition piece 201 is sleeved on the right end of the rotating shaft 2, and the second transition piece 201 is positioned on the rotating shaft 2 through the rotation stop of the key 2012. The rotating shaft 2 is provided with a shaft shoulder, the right end portion of the rotating shaft 2 is provided with a baffle ring 2013, the baffle ring 2013 is connected with the rotating shaft 2 through a screw 2014, the second transition connecting piece 201 is clamped between the shaft shoulder and the baffle ring 2013 in the axial direction of the shell 1, and the second transition connecting piece 201 is fixed on the rotating shaft 2. A sealing ring 401 is arranged between the rotating shaft 2 and the baffle ring 2013, and the sealing ring 401 is used for realizing the sealing between the rotating shaft 2 and the baffle ring 2013.
Because the dynamic seal that connects on second transition connecting piece 201 rotates 4 and is the experiment piece, dynamic seal rotates 4 and utilizes second transition connecting piece 201 to link to each other with axis of rotation 2, not only conveniently changes dynamic seal and rotates 4, can do the size that dynamic seal rotated 4 littleer moreover to reduce the material cost that dynamic seal rotated 4, and then further reduce the experiment cost.
In some embodiments, as shown in fig. 3, the housing 1 is provided with a cooling gas inlet 106 for the cooling gas to enter and a cooling gas outlet 107 for the cooling gas to flow out. Therefore, the mechanical operation device 100 is cooled by the cooling gas entering from the cooling gas inlet 106, which is beneficial to further reducing the cost of the mechanical operation device 100, improving the strength of the mechanical operation device 100 and reducing the potential safety hazard of the experiment process.
Because the heat of the rotating shaft 2 mainly comes from the second transition piece 2 in the experimental process, the temperature of the rotating shaft 2 and the components connected with the rotating shaft 2 can not be too high by cooling the second transition piece 2.
Preferably, the number of bearings is plural, a partition plate 5 is provided in the housing 1, at least one bearing is connected to the partition plate 5, the partition plate 5 is spaced from the second transition piece 201 in the axial direction of the housing 1, a vent hole 501 is provided in the partition plate 5, the vent hole 501 corresponds to the second transition piece 201 in the axial direction of the housing 1, the partition plate 5 is located between the cooling gas inlet 106 and the cooling gas outlet 107 in the axial direction of the housing 1, and the cooling gas outlet 107 is located between the partition plate 5 and the second transition piece 201 in the axial direction of the housing 1.
In the experiment, the pipe filled with the cooling gas may pass through the cooling gas inlet 106 and then be connected with the vent hole 501 on the partition 5, so that the cooling gas is directly sprayed on the second transition piece 201 and then discharged from the cooling gas outlet 107, so as to cool the second transition piece 201. As a result, second transition piece 201 can be cooled more efficiently.
In some embodiments, the bearings 8 are provided in three, the three bearings 8 are a first bearing 801, a second bearing 802 and a third bearing 803, respectively, the second bearing 802 is located between the first bearing 801 and the third bearing 803 in the axial direction of the housing 1, and the first bearing 801 is provided on the right side of the second bearing 802. The rotating shaft 2 is rotatably mounted in the chamber 103 by three bearings 8. Therefore, the rotating shaft 2 adopts a three-pivot supporting cantilever form, which is beneficial to improving the rigidity of the rotating shaft 2.
Preferably, each of the first bearing 801 and the second bearing 802 is an angular contact ball bearing with the same type, and the second bearings 802 are installed in pairs by adopting a constant-pressure pre-tightening mode. Therefore, the problem that the bearing generates heat due to the leap of the inner ring and the outer ring of the bearing is avoided.
Specifically, as shown in fig. 3 and 4, the mechanical operating device 100 further includes a preload spring 8021, a spring seat 8022, a first bushing 202, a second bushing 203, a first bearing end cap 1001, a second bearing end cap 1002, a first oil slinger 1003, and a second oil slinger 1004. A shaft shoulder is provided on the rotation shaft, the second oil slinger 1004 is connected to the diaphragm 5, and the first bearing end cap 1001 is connected to the right end of the second oil slinger 1004 by a screw 10011.
An inner race of the first bearing 801 is positioned between the shoulder and the first sleeve 202 in the axial direction of the housing 1, and an outer race of the first bearing 801 is positioned between the second oil slinger 1004 and the first bearing end cap 1001 in the axial direction of the housing 1. The first oil slinger 1003 is connected with the left end of the second oil slinger 1004 through a screw 10031, a mounting cavity is arranged on the left side of the second oil slinger 1004, a spring seat 8022 is arranged in the safety cavity, a pre-tightening spring 8021 is assembled between the spring seat and the bottom of the mounting cavity in a constant pressure mode, the inner ring of the second bearing 802 is positioned between the first shaft sleeve 202 and the second shaft sleeve 203 in the axial direction of the shell 1, the right end of the outer ring of the second bearing 802 is in jacking fit with the spring seat 8022, and an interval is formed between the left end of the outer ring of the second bearing 802 and the first oil slinger 1003, so that constant-pressure pre-tightening of. As shown in fig. 3 and 5, the inner race of the third bearing 803 is positioned between the coupling sleeve 9 and the second sleeve 203 in the axial direction of the housing 1.
In addition, the screw 1001 is sleeved with an adjusting shim, and the pretightening force of the first bearing 801 can be adjusted by the adjusting shim. The screw 10031 is sleeved with an adjusting shim, and the pre-tightening force of the second bearing 802 can be adjusted by the adjusting shim.
Preferably, the mechanical running gear 100 is about 0.5 meters long and 0.54 meters in maximum diameter. The outer diameter of the dynamic seal rotating piece 4 is 0.3 meter, and the radial heating thickness of the dynamic seal rotating piece 4 by the heating coil 2001 is 0.02 meter. The dynamic seal rotating piece 4, the second transition piece 201 and the brush ring seat sleeve are all made of high-temperature nickel-based alloy materials.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A dynamic seal test apparatus, comprising:
the mechanical operation device comprises a shell, a bearing and a rotating shaft, wherein the shell defines a cavity, the shell is provided with a first end and a second end which are opposite in the axial direction of the shell, the second end of the shell is open, the bearing is arranged in the cavity, the rotating shaft is rotatably arranged in the cavity through the bearing, the shell is provided with a plurality of first installation parts for installing static dynamic sealing parts, the first installation parts are spaced in the axial direction of the shell, and the rotating shaft is provided with a second installation part for installing dynamic sealing rotating parts;
an electromagnetic heating device including a heating coil for heating at least one of the moving seal stationary member and the moving seal rotating member.
2. The dynamic seal testing apparatus according to claim 1, wherein said heating coil is disposed adjacent to at least one of said first mounting portion and said second mounting portion in an axial direction of said housing.
3. The dynamic seal test apparatus according to claim 1, wherein the heating coil is spaced apart from an inner circumferential surface of the housing in an inside-outside direction.
4. The dynamic seal experimental facility of claim 1, wherein the electromagnetic heating device further comprises a frequency converter, and the heating coil is connected with the frequency converter through a wire.
5. The dynamic seal testing apparatus according to any one of claims 1 to 4, wherein said mechanical operating device further comprises an annular first transition piece, said first transition piece being removably connected to said housing by a first fastener, said first mounting portion being provided on said first transition piece;
an insulating coating is arranged on at least one of the shell and the first transition connecting piece;
an insulating gasket is sleeved on the first fastener;
and the rolling bodies of the bearing are made of insulating materials.
6. The dynamic seal testing apparatus according to any one of claims 1 to 4, wherein said mechanical operating device further comprises a second transition piece detachably connected to said rotating shaft by a second fastening member, and said second mounting portion is provided on said second transition piece.
7. The dynamic seal experimental facility as claimed in claim 6, wherein the housing is provided with a cooling gas inlet for the cooling gas to enter and a cooling gas outlet for the cooling gas to flow out.
8. The dynamic seal test apparatus according to claim 7, wherein a plurality of bearings are provided, a partition is provided in the housing, at least one of the bearings is connected to the partition, the partition is spaced apart from the second transition piece in the axial direction of the housing, a vent hole is provided in the partition, the vent hole corresponds to the second transition piece in the axial direction of the housing, the partition is located between the cooling gas inlet and the cooling gas outlet in the axial direction of the housing, and the cooling gas outlet is located between the partition and the second transition piece in the axial direction of the housing.
9. The dynamic seal test equipment according to any one of claims 1 to 4, wherein the first mounting parts are provided in two, and the two first mounting parts are arranged symmetrically.
10. The dynamic seal testing apparatus of any of claims 1-4, further comprising a testing platform and a motor, each of said mechanical operating device and said motor being mounted on said testing platform.
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| CN202110099314.1A CN112924094A (en) | 2021-01-25 | 2021-01-25 | Dynamic seal experimental equipment |
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| CN202110099314.1A CN112924094A (en) | 2021-01-25 | 2021-01-25 | Dynamic seal experimental equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486116A (en) * | 2021-12-31 | 2022-05-13 | 成都承奥科技有限公司 | Mechanical seal air tightness detection tester |
| CN116929643A (en) * | 2023-09-18 | 2023-10-24 | 武汉捷沃汽车零部件有限公司 | High-pressure dynamic seal test device and method for rubber ring |
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| CN116929643B (en) * | 2023-09-18 | 2023-12-26 | 武汉捷沃汽车零部件有限公司 | High-pressure dynamic seal test device and method for rubber ring |
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