CN100359190C - Built-in hydraulic oil-cylinder displacement sensor - Google Patents
Built-in hydraulic oil-cylinder displacement sensor Download PDFInfo
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- CN100359190C CN100359190C CNB031531067A CN03153106A CN100359190C CN 100359190 C CN100359190 C CN 100359190C CN B031531067 A CNB031531067 A CN B031531067A CN 03153106 A CN03153106 A CN 03153106A CN 100359190 C CN100359190 C CN 100359190C
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Abstract
The present invention relates to a built-in displacement sensor for a hydraulic oil cylinder, which comprises a shell body (2), a rotor (1), a rotary main shaft (19), cable rope (11), a spring (5) and an encoder (17), wherein the shell body (2) is fixed to one end of the hydraulic oil cylinder; one end of the cable rope (11) is wound on the rotor, and the other end is connected with a piston of the hydraulic oil cylinder; the encoder (17) is connected with the rotary main shaft. The present invention is characterized in that the rotor and the rotary main shaft are fixedly connected into a whole, and the spring is a flat spiral spring which is arranged at the outer side of the shell body. In order to solve the problems caused by the arrangement disadvantages of the spring, rotary parts and a sealing device in practical application in the prior art, the present invention provides the built-in displacement sensor which has high reliability, can accurately measure the travel range of the piston in the hydraulic oil cylinder all the time, and can be repaired and maintained conveniently.
Description
Technical field:
The present invention relates to a kind of built-in hydraulic cylinder displacement sensing device, relate in particular to the detection device that a kind of and hydraulic jack were used and operated on it control.
Background technique:
Hydraulic jack in industry manufacturing and large hydraulic machinery equipment such as smelter, the industrial fields such as various gates of harbour ship lock, Hydraulic and Hydro-Power Engineering have obtained using widely, the displacement information of hydraulic-mechanic system plays an important role to its operation control.External displacement sensing apparatus of Shi Yonging or limit switch device because wire rope or spacing instrument are exposed to the cylinder body outside, were subjected to the external environmental condition interference bigger in the past, and measuring accuracy is not high, and metrical infromation is discontinuous, makes whole hydraulic work system instability; In the hydraulic engineering particularly poor in environmental conditions, that wire rope is subjected to water impact, the external displacement transducer is more vulnerable to damage, causes equipment normally to move.
For built-in hydraulic cylinder displacement sensing device, patent documentation: patent No. ZL 01263049.7 and application number are 00108748.7 to have described built-in positioning device respectively:
1, spring the position is set:
Patent No. ZL 01263049.7 and application number are all spring to be placed in the housing in two parts of documents of 00108748.7, the defective that has two aspects so is set: on the one hand, because spring is placed in the housing, the shape and size of spring are subjected to the restriction of housing size, if improve the range of sensing device, just must strengthen housing; Housing increases to cooperate to the requirement of withstand voltage of housing, with cylinder sizes etc. and will bring a series of technical problem.On the other hand because spring belongs to the easily damaged parts of sensing device, and the life-span of sensing device mainly is subjected to the restriction of spring life, and spring is changed then very difficult when impaired.Must the long period stop the work of detected oil cylinder, and after finishing the operations such as casing of oil cylinder release, oil removing, dismounting sensing device, just can carry out spring and change, the mainteinance repair work of whole sensor device is very complicated, and using to the user makes troubles.
2, the rotating part of sensor:
Rotary bearing in patent No. ZL 01263049.7 technological scheme is installed on two side flanges, flange is subject to interior pressure (interior pressure can up to 30MPa) effect and produces distortion, influence the rotating mechanism of main shaft, or cause surface friction drag, thus the working life of reducing spring and whole sensing device.Application number is that the rotation in 00108748.7 technological scheme is to adopt a thrust ball bearing, belongs to single-point and supports rotating mechanism, and it is relative vertical to require bearing and rotor or housing side to remain, and the main shaft stability of rotation is relatively poor; Simultaneously because the seal ring of this invention is arranged on housing one side, it is poor to produce unbalanced pressure, causes the friction between rotor and housing side easily, makes the not smooth or spring restoring moment of rotor rotation can't resist frictional force, causes detection malfunctioning.
3, the setting of the seal ring of sensor:
More than two inventions oil sealings or claim the seal ring setting, have technical problem.Because seal ring belongs to the easily damaged parts of this device, the seal ring in patent No. ZL 01263049.7 technological scheme is placed in two side flanges, in case seal ring is impaired, must removes whole device and change, and workload is big, influences the user and uses.
Summary of the invention:
The present invention is in order to solve the problems of the technologies described above, as in the prior art since spring, rotatable parts and seal arrangement the problem in actual applications that shortcoming is brought is set, simultaneously more reliable in order to produce a kind of work, measuring accuracy is higher, safeguard more convenient, the sensing device of longer service life has been invented the present invention.
For realizing goal of the invention, the technological scheme of being taked is:
A kind of built-in hydraulic cylinder displacement transducer, it comprises: housing 2, rotor 1 and a rotary main shaft 19 that is fixed on hydraulic jack 22 1 ends, described device comprises that also one one end is wrapped on the described rotor 1, the hawser 11 that the other end links to each other with hydraulic jack 22 pistons 14, described this device also comprises a spring 5 and an encoder 17 that is connected with described rotary main shaft 19, and it is characterized in that: described rotor 1 is fixedlyed connected with rotary main shaft 19 and become one; Described spring 5 is a plane scroll spring, and this plane scroll spring is installed in described housing 2 outsides.
In the application of reality, described rotary main shaft is installed in the described housing 2 by angular contact ball bearing 6,6 ' rotation; Described rotor 1 is fixedlyed connected by bolt 21 with rotary main shaft 19, makes described rotor 1 and rotary main shaft 19 become a member.
In practical design, described device also comprises a bearing unit, and described bearing unit is by bearing support 3, interval axle sleeve 23 and angular contact ball bearing 6, and 6 ' three parts are socketed to form; Described rotor 1 and rotary main shaft 19 are connected in one by transition fit and described bearing unit.
In the application of reality, described hawser 11 places hydraulic jack 22 inside for wire rope and described wire rope; One end of described wire rope is fixed on the cylindrical shell of described rotor 1, and is wrapped in the groove of rotor 1 outer rim, and the other end of described wire rope links to each other with piston 14 by the connector 13 that can rotate freely.
In the application of reality, the described connector that rotates freely 13 is a wiring unit, its structure is: wiring unit 13 is socketed to form by two angular contact ball bearings 12,12 ', coupling bolt 24, end ring 25, bearing pressure pad 26, circlip for hole 27, spring washer 28; Described wiring unit 13 is fixedlyed connected with described piston 14 by described coupling bolt 24; Described wire rope 11 is connected by the disk of pin with wiring unit 13.
In practical structure, described device also comprises a side direction flange 15, and described side direction flange 15 is along a side that is fixed on described housing 2 perpendicular to the direction of rotary main shaft 19, and described rotary main shaft 19 runs through described side direction flange 15; Be installed with a guard box 16 in the outside of described side direction flange 15; described encoder 17 is arranged in the described guard box 16; described encoder 17 is fixed on described side direction flange 15 outsides by elastic support 20, and encoder 17 is connected with described rotary main shaft 19.
In practical structure, be installed with guard box 10 along housing 2 outsides perpendicular to described rotary main shaft 19, described plane scroll spring 5 one ends are fixed in the described guard box 10 by link 4, and the other end is fixed on the spring shaft core 9; Described spring shaft core 9 adopts double key system to be connected with described rotary main shaft 19.
In practical structure, the axis hole place of passing housing 2 at described rotary main shaft 19 is provided with a seal ring 8, and outside described seal ring 8 oil sealing cover 7 of socket, described oil sealing cover 7 is fixedlyed connected with described housing 2 by bolt.
In the application of reality, the measured displacement range of described built-in hydraulic cylinder displacement transducer is a 0-20 rice.
The major technique content of this invention is:
A adopts plane scroll spring, and it is installed in outside the housing of sensor, on the one hand because spring is not subjected to the restriction of shell dimension, the number of turns of spring can corresponding as required increase, improve the restoring moment of spring, satisfy the detection requirement of big stroke oil cylinder, the while is owing to the increase of the number of coils, corresponding prolongation in the working life of spring; On the other hand, spring is that this installs main repair and maintenance parts, it is placed in outside the housing, the a series of activities such as casing of need not carry out detected oil cylinder release, removing sensing device, can carry out scene replacing and maintenance to spring, thereby reduce influence to greatest extent detected oil cylinder proper functioning.
The B rotating part adopts rotor and rotary main shaft design integration method.For the ease of making, rotor and rotary main shaft are processed respectively, connect with bolt during installation, make it to become a member.Bearing unit is by bearing support, axle sleeve at interval, and three parts of angular contact ball bearing are formed.Rotor and rotary main shaft are linked to be one by transition fit and bearing unit and rotate integral body, rotate flexibly, stablize thereby reach.
Seal ring on the C rotary main shaft is fixed with oil sealing cover, and oil sealing cover makes seal ring produce certain pre-compressive strain on the one hand, strengthens sealing effect.On the other hand,, adopt oil sealing cover mode fixed seal ring, be convenient to the replacing of seal ring, guarantee device safety proper functioning because seal ring is the easily damaged parts of this device.
The present invention has designed a kind of high reliability that both had, and can accurately measure the stroke of piston in the hydraulic jack constantly, is convenient to the built-in displacement sensing apparatus of care and maintenance again.
Description of drawings:
Fig. 1 is the sectional structure schematic representation of this device;
The overall relation figure that Fig. 2 is connected with hydraulic jack for this device;
Fig. 3 is the rotating mechanism schematic representation of this device;
Fig. 4 is the mechanical schematic of wiring unit in this device.
Each accompanying drawing is illustrated in conjunction with embodiment.
Embodiment:
As Fig. 1 is the sectional structure schematic representation of this device, shown in this device, comprise seal casinghousing 2, rotor 1, rotary main shaft 19, wire rope 11, plane scroll spring 5, encoder 17, rotary main shaft 19 is connected in one by bolt 21 with rotor 1, and rotary main shaft 19 is installed in the seal casinghousing 2 by two angular contact ball bearings 6 and O RunddichtringO 8.One end of wire rope 11 is fixed on rotor 1 cylindrical shell, and be wrapped in an orderly manner in the groove of rotor 1 outer rim, the other end links to each other with piston 14 by a wiring unit that can rotate freely 13, rotating freely of wiring unit 13 can guarantee that stretching wire rope 11 is consistent with piston 14 moving direction, eliminates measurement error.Be separately installed with spring 5 and encoder 17 in the both sides of seal casinghousing 2 and side direction flange 15, encoder 17 and spring 5 are installed in respectively in guard box 16 and 10.Encoder 17 is fixed on the side direction flange 15 by elastic support 20, and links to each other with rotary main shaft 19 by link 18.Spring 5 one ends are fixed on the guard box 10 by link 4, and the other end is fixed on the central spindle of the spring 9, and central spindle of the spring 9 adopts double key system to connect with rotary main shaft 19.When hydraulic cylinder piston 14 was descending, wire rope 11 drove rotors 1 and rotary main shaft 19 rotations, tightens up spring 5 by rotary main shaft 19; When hydraulic cylinder piston 14 was up, the restoring moment by spring 5 made rotary main shaft 19 drive rotors 1 counterrotating, guarantees that wire rope 11 is in tensioning state all the time.
The overall relation figure that Fig. 2 is connected with hydraulic jack for this device
The working principle of this device is for when the piston 14 of hydraulic jack 22 is in upper limit, and wire rope 11 is wrapped on the rotor 1.When piston 14 was descending, the wire rope 11 that connects with piston 14 drives rotors 1 and rotary main shaft 19 is rotated in the forward, and the rotation by rotary main shaft 19 is tightened up spring 5.When piston 14 was up, spring 5 relied on its restoring moments to make rotary main shaft 19 drive rotors 1 counterrotating, and tense wire rope 11.In this process, encoder 17 is followed rotary main shaft 19 and is rotated synchronously under the drive of rotary main shaft 19, the displacement that can draw piston 14 thus according to the diameter and encoder 17 rotating cycles of rotor 1, displacement amount converts digital signal to by encoder 17, be sent to the control instrument of hydraulic jack 22 detection systems, on the one hand can demonstrate displacement data, on the other hand, reach automatic management hydraulic-mechanic system by the displacement numerical information that detects by control instrument.
Fig. 3 is the rotating mechanism schematic representation of this device,
Rotary main shaft 19 is installed in the housing 2 by angular contact ball bearing 6,6 ' rotation; Rotor 1 is fixedlyed connected by bolt 21 with rotary main shaft 19, makes rotor 1 and rotary main shaft 19 become a member.Also comprise a bearing unit in the rotational structure, described bearing unit is by bearing support 3, interval axle sleeve 23 and angular contact ball bearing 6, and 6 ' three parts are socketed to form; Rotor 1 and rotary main shaft 19 are connected in one by transition fit and bearing unit.The axis hole place of passing housing 2 at rotary main shaft 19 is provided with a seal ring 8, and outside described seal ring 8 oil sealing cover 7 of socket, described oil sealing cover 7 is fixedlyed connected with described housing 2 by bolt.
Fig. 4 is the mechanical structure schematic representation of this device wiring unit
Claims (7)
1, a kind of built-in hydraulic cylinder displacement transducer, it comprises: seal casinghousing (2), rotor (1) and a rotary main shaft (19) that is fixed on hydraulic jack (22) one ends, described sensor comprises that also one one end is wrapped on the described rotor (1), the hawser (11) that the other end links to each other with hydraulic jack (22) piston (14), described sensor also comprises a spring (5) and an encoder (17) that is connected with described rotary main shaft (19), and it is characterized in that: described rotor (1) is fixedlyed connected with rotary main shaft (19) and become one; Described spring (5) is a plane scroll spring, and this plane scroll spring is installed in described housing (2) outside;
Described rotary main shaft (19) is installed in the described housing (2) by angular contact ball bearing (6,6 ') rotation; Described rotor (1) is fixedlyed connected by bolt (21) with rotary main shaft (19), makes described rotor (1) and rotary main shaft (19) become a member;
Described sensor also comprises a bearing unit, and described bearing unit is socketed to form by bearing support (3), interval axle sleeve (23) and angular contact ball bearing (6,6 ') three parts; Described rotor (1) and rotary main shaft (19) are connected in one by transition fit and described bearing unit.
2, built-in hydraulic cylinder displacement transducer according to claim 1 is characterized in that: described hawser (11) places hydraulic jack (22) inside for wire rope and described wire rope; One end of described wire rope is fixed on the cylindrical shell of described rotor (1), and is wrapped in the groove of rotor (1) outer rim, and the other end of described wire rope links to each other with piston (14) by the connector (13) that can rotate freely.
3, built-in hydraulic cylinder displacement transducer according to claim 2, it is characterized in that: the described connector that rotates freely (13) is a wiring unit, its structure is: wiring unit (13) is socketed to form by two angular contact ball bearings (12,12 '), coupling bolt (24), end ring (25), bearing pressure pad (26), circlip for hole (27), spring washer (28); Described wiring unit (13) is fixedlyed connected with described piston (14) by described coupling bolt (24); Described wire rope (11) is connected by the disk of pin with wiring unit (13).
4, built-in hydraulic cylinder displacement transducer according to claim 1, it is characterized in that: described sensor also comprises a side direction flange (15), described side direction flange (15) is along a side that is fixed on described housing (2) perpendicular to the direction of rotary main shaft (19), and described rotary main shaft (19) runs through described side direction flange (15); Be installed with a guard box (16) in the outside of described side direction flange (15); described encoder (17) is arranged in the described guard box (16); described encoder (17) is fixed on described side direction flange (15) outside by elastic support (20), and encoder (17) is connected with described rotary main shaft (19).
5, built-in hydraulic cylinder displacement transducer according to claim 1, it is characterized in that: be installed with guard box (10) along hull outside perpendicular to described rotary main shaft (19), described plane scroll spring (5) one ends are fixed in the described guard box (10) by link (4), and the other end is fixed on the spring shaft core (9); Described spring shaft core (9) adopts double key system to be connected with described rotary main shaft (19).
6, built-in hydraulic cylinder displacement transducer according to claim 1, it is characterized in that: the axis hole place of passing housing (2) at described rotary main shaft (19) is provided with a seal ring (8), and outside described seal ring (8) oil sealing cover of socket (7), described oil sealing cover (7) is fixedlyed connected with described housing (2) by bolt.
7, built-in hydraulic cylinder displacement transducer according to claim 1 is characterized in that: the measured displacement range of described built-in hydraulic cylinder displacement transducer is a 0-20 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031531067A CN100359190C (en) | 2003-08-07 | 2003-08-07 | Built-in hydraulic oil-cylinder displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031531067A CN100359190C (en) | 2003-08-07 | 2003-08-07 | Built-in hydraulic oil-cylinder displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580586A CN1580586A (en) | 2005-02-16 |
| CN100359190C true CN100359190C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031531067A Expired - Fee Related CN100359190C (en) | 2003-08-07 | 2003-08-07 | Built-in hydraulic oil-cylinder displacement sensor |
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| CN (1) | CN100359190C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310126A (en) * | 2011-10-14 | 2012-01-11 | 天津市天锻压力机有限公司 | Longitudinal beam hydraulic press displacement detection device |
| CN103759744B (en) * | 2014-01-21 | 2016-03-02 | 南京理工技术转移中心有限公司 | A kind of flexible displacement transmission mechanism |
| CN107218267B (en) * | 2017-06-01 | 2019-06-21 | 武汉船用机械有限责任公司 | It is a kind of for detecting the device of hydraulic cylinder displacement |
| CN109488656B (en) * | 2018-12-26 | 2023-11-10 | 中国煤炭科工集团太原研究院有限公司 | Built-in hydraulic cylinder displacement and speed sensor |
| CN110849337B (en) * | 2019-12-04 | 2020-06-02 | 哈尔滨学院 | Measuring device for civil engineering |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121504A (en) * | 1977-01-21 | 1978-10-24 | Inovec, Inc. | Cylinder positioning systems |
| EP0305306A1 (en) * | 1987-08-27 | 1989-03-01 | Societe D'etudes Et De Montages Sdem Societe Anonyme | Hydraulic actuator with piston rod positioning means |
| EP0505297A1 (en) * | 1991-03-22 | 1992-09-23 | Gec Alsthom-Societe D'etudes Et De Montages | Hydraulic actuator with piston positioning means |
| CN2329956Y (en) * | 1998-03-13 | 1999-07-21 | 刘学平 | Spring-type liquid level sensor |
| CN1275682A (en) * | 1999-05-31 | 2000-12-06 | 皮埃尔·克洛韦尔 | Lifting equipment with device for continuous measuring and indicating lifting-rod position |
| CN2432574Y (en) * | 2000-06-12 | 2001-05-30 | 华中光电技术研究所 | Sealing hydraulic cylinder stroke measuring device |
| CN2496919Y (en) * | 2001-09-30 | 2002-06-26 | 常州市海通电子设备厂 | Built-in water-gate mouth sensing device |
| CN2628781Y (en) * | 2003-08-07 | 2004-07-28 | 北京欧特科新技术有限公司 | Built-in hydraulic oil cylinder displacement transducer |
-
2003
- 2003-08-07 CN CNB031531067A patent/CN100359190C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121504A (en) * | 1977-01-21 | 1978-10-24 | Inovec, Inc. | Cylinder positioning systems |
| EP0305306A1 (en) * | 1987-08-27 | 1989-03-01 | Societe D'etudes Et De Montages Sdem Societe Anonyme | Hydraulic actuator with piston rod positioning means |
| EP0505297A1 (en) * | 1991-03-22 | 1992-09-23 | Gec Alsthom-Societe D'etudes Et De Montages | Hydraulic actuator with piston positioning means |
| CN2329956Y (en) * | 1998-03-13 | 1999-07-21 | 刘学平 | Spring-type liquid level sensor |
| CN1275682A (en) * | 1999-05-31 | 2000-12-06 | 皮埃尔·克洛韦尔 | Lifting equipment with device for continuous measuring and indicating lifting-rod position |
| CN2432574Y (en) * | 2000-06-12 | 2001-05-30 | 华中光电技术研究所 | Sealing hydraulic cylinder stroke measuring device |
| CN2496919Y (en) * | 2001-09-30 | 2002-06-26 | 常州市海通电子设备厂 | Built-in water-gate mouth sensing device |
| CN2628781Y (en) * | 2003-08-07 | 2004-07-28 | 北京欧特科新技术有限公司 | Built-in hydraulic oil cylinder displacement transducer |
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| CN1580586A (en) | 2005-02-16 |
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