CN117108747A - Normally closed type active control conical surface throttler - Google Patents
Normally closed type active control conical surface throttler Download PDFInfo
- Publication number
- CN117108747A CN117108747A CN202311068088.6A CN202311068088A CN117108747A CN 117108747 A CN117108747 A CN 117108747A CN 202311068088 A CN202311068088 A CN 202311068088A CN 117108747 A CN117108747 A CN 117108747A
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- Prior art keywords
- cone
- sliding cone
- cavity
- normally closed
- oil
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- 239000000919 ceramic Substances 0.000 claims abstract description 70
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 230000002035 prolonged effect Effects 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 62
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 230000002706 hydrostatic effect Effects 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000462 isostatic pressing Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- 230000003068 static effect Effects 0.000 abstract description 16
- 239000010408 film Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
Abstract
The invention discloses a normally closed active control conical surface throttler, which relates to the technical field of static pressure and mainly comprises a valve body, a sliding cone, an elastic piece, an upper shell, piezoelectric ceramics and an end cover; the valve body is of a hollow structure, a working cavity is arranged in the valve body, and a conical hole is formed in the lower part of the working cavity; the upper end part of the sliding cone is provided with a baffle ring, and the lower end part of the sliding cone is provided with a cone-shaped boss; the sliding cone is provided with a guide boss in the working cavity, an annular oil cavity is formed between the sliding cone and the working cavity at the lower end of the guide boss, an annular pre-pressing oil cavity is formed between the sliding cone and the working cavity at the upper end of the guide boss, and the annular oil cavity is communicated with the annular pre-pressing oil cavity through a through hole; the normally closed active control conical surface throttler adopts a normally closed design, and when the piezoelectric ceramic is in a non-working state, the throttle gap is 0, the flow is 0, the working time of the piezoelectric ceramic is shortened, and the service life of the piezoelectric ceramic is prolonged.
Description
Technical Field
The invention relates to the technical field of static pressure, in particular to a normally closed active control conical surface restrictor.
Background
Hydrostatic technology has wide application in precision machinery, hydrostatic guides, hydrostatic bearings, hydrostatic screws being typical examples of applications. The throttler is an indispensable important component in a hydrostatic bearing or a hybrid bearing system, and utilizes hydraulic resistance to form pressure difference to control or regulate the pressure and flow of each oil cavity, and the throttling performance of the throttler has obvious influence on the bearing capacity, static/dynamic stiffness, precision and the like of hydrostatic equipment.
Common throttles can be classified into fixed throttles, variable throttles, and active control throttles. The fixed throttler mainly comprises a capillary type throttler, a small hole type throttler, a slit type throttler and the like, and when the fixed throttler works, the throttle liquid resistance is kept unchanged, and the bearing capacity and the rigidity are always smaller than those of the variable throttler. The fixed throttle has a simple throttle mode, but can only play a role when the main shaft is deviated, so the throttle has the problems of low oil film rigidity, poor stability, low rotation precision and the like. The variable throttle mainly comprises a film feedback type throttle, a slide valve feedback type throttle and the like, and the liquid resistance of the variable throttle can be automatically feedback-adjusted according to the load change of static pressure equipment, so that the static pressure main shaft can be ensured to run stably. However, when the thin film of the thin film restrictor is too thin, buckling deformation is easy to occur, when the thin film is too thick, the dynamic response time of the restrictor is long, and the anti-interference capability is weak. The slide valve feedback throttle has larger slide valve inertia, has overshoot problem in the adjusting process, and has poor stability. These problems have limited the use of static pressure equipment in high speed, high precision, heavy duty applications to a large extent. The active control throttle is to add a control system on the variable throttle, and the dynamic parameters (such as rigidity, damping and the like) of the static pressure equipment are regulated by changing the parameters of the active control throttle, so that the vibration can be effectively restrained, the stability of the system can be improved, the change information of the position can be output, the running state detection of the static pressure equipment can be realized, and the higher supporting precision and rigidity can be obtained.
In the invention patent CN105370958B, a piezoelectric ceramic driven film type servo valve, the throttle clearance is precisely controlled by the piezoelectric ceramic, so that the precise active control of the pressure and the flow is realized. However, the throttle is of a normally open structure, and when the piezoelectric ceramic does not work, the throttle gap is maximum, the flow is maximum, and the transition waste of energy is caused. If the flow is desired to be reduced for a long time, the piezoelectric ceramic must be in an operating state to provide output thrust, ensure the deformation of the film, and reduce the throttle gap, which results in long-time operation of the piezoelectric ceramic and influences the service life thereof.
Therefore, the structure of the throttle is improved, the instability is eliminated, the throttle performance is improved, the service life is prolonged, the energy waste is reduced, and the throttle has important significance for popularization and application of static pressure equipment and development of high speed and high precision.
Disclosure of Invention
The invention provides a normally closed type active control conical surface throttler, which adopts a normally closed type design, wherein when piezoelectric ceramics are in a non-working state, a throttle gap is 0, the flow is 0, the waste of energy is reduced, the working time of the piezoelectric ceramics is reduced, and the service life is prolonged.
The technical scheme of the invention for achieving the purpose is that the normally closed active control conical surface throttler mainly comprises a valve body, a sliding cone, an elastic piece, an upper shell, piezoelectric ceramics and an end cover; the valve body is of a hollow structure, a working cavity is arranged in the valve body, the working cavity is cylindrical, and a conical hole is formed in the lower part of the working cavity; the upper end part of the sliding cone is provided with a baffle ring, the lower end part of the sliding cone is provided with a conical boss, the conical angles of the conical boss and the conical hole are equal, and after the conical boss is matched with the conical hole, conical throttling is formed between the conical boss and the conical hole; the sliding cone can move bidirectionally along the axis direction of the sliding cone, and a guide boss is arranged in the working cavity of the sliding cone, so that the sliding cone has a guide function and ensures the stability of the sliding cone; the guide boss is further provided with a plurality of through holes uniformly distributed along the circumferential direction, an annular oil cavity is formed between the sliding cone and the working cavity at the lower end of the guide boss, an annular pre-pressing oil cavity is formed between the sliding cone and the working cavity at the upper end of the guide boss, and the annular oil cavity is communicated with the annular pre-pressing oil cavity through the through holes.
The elastic piece is arranged in the annular pre-pressing oil cavity, one end of the elastic piece is connected with the sliding cone, the other end of the elastic piece is connected with the upper shell, and the elastic piece can be made of a spring or other elastic materials.
The valve body upper portion is provided with a plurality of first screw thread mounting holes along the circumference direction equipartition, realizes the close connection of valve body and last casing, and seamless, end cover upper portion is provided with a plurality of second screw thread mounting holes along the circumference direction equipartition, realizes the close connection of end cover and last casing, reduces the vibration and the wearing and tearing of part to the life of extension choke ware.
The piezoelectric ceramic is arranged in the upper shell, is in a hollow columnar structure, and the sliding cone penetrates through the hollow cavity of the piezoelectric ceramic; one end of the piezoelectric ceramic is connected with a baffle ring of the sliding cone, the other end of the piezoelectric ceramic is connected with an upper shell, the upper shell and the piezoelectric ceramic are in clearance fit, and the sliding cone and the piezoelectric ceramic are in clearance fit.
The bottom of the valve body is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the working cavity through a first channel, the oil outlet is connected with the bottom of the conical hole, and the oil outlet is connected to a static pressure cavity of static pressure bearing, a static pressure guide rail, a static pressure rotary table, a static pressure lead screw isostatic pressing device.
The annular oil cavity is communicated with the first channel, so that lubricating oil entering from the oil inlet hole can be rapidly dispersed to the circumference of the sliding cone, and the fluidity of the lubricating oil in the working cavity of the valve body is improved.
A sealing ring is arranged between the sliding cone and the upper shell, so that lubricating oil is prevented from flowing to the piezoelectric ceramics from the annular pre-pressing oil cavity.
The working principle of the normally closed active control conical surface throttler is as follows: the extension or shortening of the piezoelectric ceramic is controlled by actively controlling the change of the driving voltage of the piezoelectric ceramic. When the piezoelectric ceramic is in a working state, driving voltage is increased, the piezoelectric ceramic stretches, the guide boss guides the sliding cone to move upwards and stably against the spring force, so that the conical surface is throttled and opened, one part of lubricating oil flows to the annular pre-pressing oil cavity through the through hole, and the other part of lubricating oil flows to the oil outlet through the conical surface throttle; the size of the throttling gap of the conical surface throttling is regulated by controlling the elongation of the piezoelectric ceramic, when the throttling gap is increased, the output flow of the oil outlet is increased, and when the throttling gap is reduced, the output flow of the oil outlet is reduced, so that the effect of actively regulating the output flow of the normally closed active control conical surface throttler is achieved. When the piezoelectric ceramic is in a non-working state, the driving voltage is reduced, the piezoelectric ceramic is shortened, the guide boss guides the sliding cone to move downwards and stably, the conical boss is in close contact with the conical hole, the conical surface is throttled and closed, and lubricating oil cannot circulate to the oil outlet.
The normally-closed active control conical surface restrictor manufactured by the technical scheme of the invention has the beneficial effects that: (1) The normally closed structure is adopted, so that the energy transition waste caused by the maximum throttling gap and the maximum flow rate when the piezoelectric ceramic is in a non-working state in the piezoelectric ceramic driving film type servo valve of the invention patent CN105370958B is avoided; (2) By adopting a normally closed design, when the piezoelectric ceramic is in a non-working state, the throttling gap is 0, and the flow is 0, so that the working time of the piezoelectric ceramic is shortened, and the service life of the piezoelectric ceramic is prolonged; (3) The sliding cone is pre-pressed by the pressure oil in the annular pre-pressing cavity, so that the vibration of the sliding cone during working can be restrained, the sliding cone moves stably, the throttling stability of the sliding cone is improved, and the damping and restraining effects of the hydraulic static pressure supporting component on high-frequency vibration disturbance, high-frequency pressure fluctuation and film vibration under high-speed working conditions or high-frequency vibration disturbance are improved; (4) The lubricating oil is introduced into the spring part to lubricate the spring moving part, so that the stability of the sliding cone movement is further improved.
Drawings
FIG. 1 is a cross-sectional view of the piezoelectric ceramic operating state of the normally closed actively controlled cone restrictor of the present invention;
FIG. 2 is a cross-sectional view of the piezoelectric ceramic of the normally closed actively controlled cone restrictor of the present invention in a non-operational state;
in the above-mentioned figures of the drawing,
1. a valve body; 2. a sliding cone; 3. an elastic member; 4. an upper housing; 5. piezoelectric ceramics; 6. an end cap;
11. a working chamber; 12. an oil inlet hole; 13. an oil outlet hole; 14. a first channel; 15. a tapered bore; 16. a first threaded mounting hole; 17. conical surface throttling; 18. an annular oil chamber; 19. an annular prepressing oil cavity;
21. a conical boss; 22. a guide boss; 23. a through hole; 24. a baffle ring;
41. a seal ring;
61. and a second threaded mounting hole.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the accompanying drawings and preferred embodiments:
the utility model provides a normal close formula initiative control conical surface choke ware, mainly includes valve body 1, slip awl 2, elastic component 3, goes up casing 4, piezoceramics 5 and end cover 6, specifically: as shown in fig. 1 and 2, the valve body 1 has a hollow structure, a working cavity 11 is arranged in the valve body, the working cavity 11 is cylindrical, and a conical hole 15 is arranged at the lower part of the working cavity 11; the upper end part of the sliding cone 2 is provided with a baffle ring 24, the lower end part is provided with a conical boss 21, the cone angles of the conical boss 21 and the conical hole 15 are equal, and after the conical boss 21 is matched with the conical hole 15, a conical throttling 17 is formed between the conical boss 21 and the conical hole 15; the sliding cone 2 can move bidirectionally along the axis direction of the sliding cone 2, and a guide boss 22 is arranged in the working cavity 11 of the sliding cone 2, so that the sliding cone 2 has a guide function and ensures the stability of the sliding cone 2; the guide boss 22 is further provided with 4 through holes 23 uniformly distributed along the circumferential direction, an annular oil cavity 18 is formed between the sliding cone 2 and the working cavity 11 at the lower end of the guide boss 22, an annular pre-pressing oil cavity 19 is formed between the sliding cone 2 and the working cavity 11 at the upper end of the guide boss 22, and the annular oil cavity 18 is communicated with the annular pre-pressing oil cavity 19 through the through holes 23.
Further, the elastic member 3 is disposed in the annular pre-pressing oil cavity 19, one end of the elastic member is connected with the sliding cone 2, and the other end of the elastic member is connected with the upper shell 4, and the elastic member 3 can be a spring or other elastic materials.
Further, the upper portion of the valve body 1 is provided with 6 first threaded mounting holes 16 uniformly distributed along the circumferential direction, so that tight connection and seamless connection between the valve body 1 and the upper shell 4 are realized, the upper portion of the end cover 6 is provided with 6 second threaded mounting holes 61 uniformly distributed along the circumferential direction, tight connection between the end cover 6 and the upper shell 4 is realized, vibration and abrasion of parts are reduced, and accordingly the service life of the throttle is prolonged.
Further, the piezoelectric ceramic 5 is arranged in the upper shell 4, the piezoelectric ceramic 5 is of a hollow columnar structure, and the sliding cone 2 penetrates through the hollow cavity of the piezoelectric ceramic 5; one end of the piezoelectric ceramic 5 is connected with the baffle ring 24 of the sliding cone 2, the other end of the piezoelectric ceramic 5 is connected with the upper shell 4, the upper shell 4 and the piezoelectric ceramic 5 are in clearance fit, and the sliding cone 2 and the piezoelectric ceramic 5 are in clearance fit.
Further, an oil inlet hole 12 and an oil outlet hole 13 are formed in the bottom of the valve body 1, the oil inlet hole 12 is communicated with the working cavity 11 through a first channel 14, the oil outlet hole 13 is connected with the bottom of the conical hole 15, and the oil outlet hole 13 is connected to a hydrostatic cavity of hydrostatic equipment such as a hydrostatic bearing, a hydrostatic guideway, a hydrostatic turntable and a hydrostatic screw.
Preferably, the annular oil chamber 18 communicates with the first passage 14 so that the lubricating oil entering from the oil inlet hole 12 can be rapidly dispersed to the circumference of the sliding cone 2, improving the fluidity of the lubricating oil in the working chamber 11 of the valve body 1.
Further, a seal ring 41 is provided between the slide cone 2 and the upper case 4, thereby preventing the flow of lubricating oil from the annular pre-compression oil chamber 19 to the piezoelectric ceramics 5.
The working principle of the invention is as follows: the extension or shortening of the piezoelectric ceramic is controlled by actively controlling the change of the driving voltage of the piezoelectric ceramic. As shown in fig. 1, when the piezoelectric ceramic 5 is in a working state, a driving voltage is increased, the piezoelectric ceramic 5 is elongated, the guide boss 22 guides the sliding cone 2 to move upwards stably against the spring force, so that the conical surface throttle 17 is opened, one part of lubricating oil flows to the annular pre-pressing oil cavity 19 through the through hole 23, and the other part flows to the oil outlet 13 through the conical surface throttle 17; the size of the throttling gap of the conical surface throttling 17 is regulated by controlling the elongation of the piezoelectric ceramic 5, when the throttling gap is increased, the output flow of the oil outlet 13 is increased, and when the throttling gap is reduced, the output flow of the oil outlet 13 is reduced, so that the effect of actively regulating the output flow of the normally closed active control conical surface throttling device is achieved. As shown in fig. 2, when the piezoelectric ceramic 5 is in the non-operating state, the driving voltage is reduced, the piezoelectric ceramic 5 is shortened, the guide boss 22 guides the sliding cone 2 to move downward and smoothly, so that the tapered boss 21 is brought into close contact with the tapered hole 15, the tapered throttle 17 is closed, and the lubricating oil cannot flow to the oil outlet hole 13.
The normally closed active control conical surface throttler of the embodiment is of a normally closed structure, so that energy transition waste caused by maximum throttling gaps and maximum flow when piezoelectric ceramics do not work in a piezoelectric ceramic driving film type servo valve of an invention patent CN105370958B is avoided; the embodiment adopts a normally closed design, when the piezoelectric ceramic does not work, the throttling gap is 0, the flow is 0, the working time of the piezoelectric ceramic is reduced, and the service life of the piezoelectric ceramic is prolonged; the sliding cone is pre-pressed by the pressure oil in the annular pre-pressing cavity, so that the vibration of the sliding cone during working can be restrained, the sliding cone moves stably, the throttling stability of the sliding cone is improved, and the damping and restraining effects of the hydraulic static pressure supporting component on high-frequency vibration disturbance, high-frequency pressure fluctuation and film vibration under high-speed working conditions or high-frequency vibration disturbance are improved; the lubricating oil is introduced into the spring part to lubricate the spring moving part, so that the stability of the sliding cone movement is further improved.
The invention has been described above with reference to preferred embodiments, but the scope of the invention is not limited thereto, various modifications may be made thereto and equivalents may be substituted for elements thereof without structural conflict, technical features mentioned in the various embodiments may be combined in any way, and any reference signs in the claims shall not be construed as limiting the claims concerned, the embodiments shall be construed as exemplary and non-limiting in all respects. Therefore, any and all technical solutions falling within the scope of the claims are within the scope of the present invention.
Claims (9)
1. A normally closed active control cone restrictor, comprising: the valve comprises a valve body (1), a sliding cone (2), an elastic piece (3), an upper shell (4), piezoelectric ceramics (5) and an end cover (6); the valve body (1) is of a hollow structure, a working cavity (11) is arranged in the valve body, the working cavity (11) is cylindrical, and a conical hole (15) is formed in the lower portion of the working cavity (11); the upper end part of the sliding cone (2) is provided with a baffle ring (24), the lower end part of the sliding cone is provided with a conical boss (21), the conical angle of the conical boss (21) is equal to that of the conical hole (15), and after the conical boss (21) is matched with the conical hole (15), a conical throttling (17) is formed between the conical boss (21) and the conical hole (15); the sliding cone (2) can move bidirectionally along the axis direction of the sliding cone, a guide boss (11) is arranged in the working cavity (11) of the sliding cone (2), so that the sliding cone has a guide function and ensures the stability of the sliding cone (2); the guide boss (22) is further provided with a plurality of through holes (23) uniformly distributed along the circumferential direction, an annular oil cavity (18) is formed between the sliding cone (2) and the working cavity (11) at the lower end of the guide boss (22), an annular pre-pressing oil cavity (19) is formed between the sliding cone (2) and the working cavity (11) at the upper end of the guide boss (22), and the annular oil cavity (18) is communicated with the annular pre-pressing oil cavity (19) through the through holes (23).
2. The normally closed active control cone restrictor according to claim 1, characterized in that the elastic member (3) is arranged in the annular pre-pressing oil cavity (19), one end of the elastic member is connected with the sliding cone (2), the other end is connected with the upper shell (4), and the elastic member (3) can be a spring or other elastic materials.
3. The normally closed active control conical surface throttler according to claim 1, wherein a plurality of first threaded mounting holes (16) uniformly distributed along the circumferential direction are formed in the upper portion of the valve body (1), tight connection and no gaps of the valve body (1) and the upper shell (4) are achieved, a plurality of second threaded mounting holes (61) uniformly distributed along the circumferential direction are formed in the upper portion of the end cover (6), tight connection of the end cover (6) and the upper shell (4) is achieved, vibration and abrasion of parts are reduced, and accordingly the service life of the throttler is prolonged.
4. The normally closed active control cone restrictor of claim 1, characterized in that the upper housing (4) is internally provided with piezoelectric ceramics (5), the piezoelectric ceramics (5) are in a hollow columnar structure, and the sliding cone (2) passes through the hollow cavity of the piezoelectric ceramics (5); one end of the piezoelectric ceramic (5) is connected with a baffle ring (24) of the sliding cone (2), the other end of the piezoelectric ceramic is connected with the upper shell (4), the upper shell (4) and the piezoelectric ceramic (5) are in clearance fit, and the sliding cone (2) and the piezoelectric ceramic (5) are in clearance fit.
5. The normally closed active control conical surface restrictor according to claim 1, characterized in that the bottom of the valve body (1) is provided with an oil inlet hole (12) and an oil outlet hole (13), the oil inlet hole (12) is communicated with the working cavity (11) through a first channel (14), the oil outlet hole (13) is connected with the bottom of the conical hole (15), and the oil outlet hole (13) is connected to a hydrostatic cavity of a hydrostatic bearing, a hydrostatic guideway, a hydrostatic turntable, a hydrostatic screw isostatic pressing device.
6. The normally closed active control cone restrictor of claim 5, characterized in that the annular oil chamber (18) is in communication with the first channel (14) so that the lubricating oil entering from the oil inlet hole (12) can be rapidly dispersed to the circumference of the sliding cone (2), and the fluidity of the lubricating oil in the working chamber (11) of the valve body (1) is improved.
7. A normally closed active control cone restrictor according to claim 1, characterized in that a sealing ring (41) is arranged between the sliding cone (2) and the upper housing (4) so as to prevent the flow of lubricating oil from the annular pre-compression oil chamber (19) to the piezo-ceramic (5).
8. A normally closed active control cone restrictor according to any of claims 1-7, characterized in that the piezoelectric ceramic is controlled to extend or shorten by actively controlling the driving voltage variation of the piezoelectric ceramic; when the piezoelectric ceramic (5) is in a working state, driving voltage is increased, the piezoelectric ceramic (5) stretches, the guide boss (22) guides the sliding cone (2) to move upwards and stably against the spring force, so that the conical surface throttle (17) is opened, one part of lubricating oil flows into the annular pre-pressing oil cavity (19) through the through hole (23), and the other part of lubricating oil flows into the oil outlet hole (13) through the conical surface throttle (17); the size of a throttling gap of the conical surface throttling device (17) is adjusted by controlling the elongation of the piezoelectric ceramic (5), when the throttling gap is increased, the output flow of the oil outlet (13) is increased, and when the throttling gap is decreased, the output flow of the oil outlet (13) is decreased, so that the effect of actively adjusting the output flow of the normally closed active control conical surface throttling device is achieved.
9. A normally closed active control cone restrictor according to any of claims 1-7, characterized in that when the piezo-ceramic (5) is in a non-operating state, the driving voltage is reduced, the piezo-ceramic (5) shortens, the guiding boss (22) guides the sliding cone (2) to move smoothly downwards, so that the cone boss (21) is in close contact with the cone hole (15), the cone restrictor (17) is closed, and lubricating oil cannot circulate to the oil outlet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311068088.6A CN117108747A (en) | 2023-08-23 | 2023-08-23 | Normally closed type active control conical surface throttler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311068088.6A CN117108747A (en) | 2023-08-23 | 2023-08-23 | Normally closed type active control conical surface throttler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117108747A true CN117108747A (en) | 2023-11-24 |
Family
ID=88805005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311068088.6A Pending CN117108747A (en) | 2023-08-23 | 2023-08-23 | Normally closed type active control conical surface throttler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117108747A (en) |
-
2023
- 2023-08-23 CN CN202311068088.6A patent/CN117108747A/en active Pending
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