CN204961530U - Hydraulic nut with overpressure protection function - Google Patents
Hydraulic nut with overpressure protection function Download PDFInfo
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- CN204961530U CN204961530U CN201520698379.8U CN201520698379U CN204961530U CN 204961530 U CN204961530 U CN 204961530U CN 201520698379 U CN201520698379 U CN 201520698379U CN 204961530 U CN204961530 U CN 204961530U
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- nut
- nut body
- duct
- hydraulic
- piston
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Abstract
The utility model discloses a hydraulic nut with overpressure protection function. Including nut body and piston, the piston slidable of cylinder tube -shape puts into in the heavy groove of nut body, be fixed with the one or more glib talker at the nut body terminal surface, it is glib through seting up the first pore and working chamber intercommunication in nut body, be fixed with the relief valve of intercommunication working chamber on nut body. The utility model discloses the relief valve has been add on hydraulic nut, as restriction operating pressure's usefulness. Compared with the prior art, the beneficial effects of the utility model are that: when the inside fluid of hydraulic nut rose a definite value because of operational environment temperature height inflation build -up of pressure, the relief valve can reduce fluid pressure with the release of partly fluid, avoids the too big equipment that leads to the fact of fastening power of nut to damage, has higher practicality.
Description
Technical field
The utility model relates to a kind of machanical fastener, specifically a kind of hydraulic nut with overpressure protection function.
Background technique
Along with the progress of Large-Scale Equipment manufacturing technology, its package size and working parameters etc. constantly increase and improve, and need larger nut to be used for fastening relevant component.Hydraulic nut, as a kind of novel fastening piece, utilizes pressure energy to realize comparatively greatly and is easy to the pretightening force of control, obtaining and apply very widely in the industries such as mine, metallurgy, petrochemical industry, nuclear power.
In the actual using process of hydraulic nut, as long as ensure the pressure of its inside, just can ensure enough pretightening forces.But due to some cause specifics, such as, by the impact etc. of the environment such as sunshine, high temperature heat source, the hydraulic oil of hydraulic nut inside is heated and expands.As everyone knows, the compressibility of hydraulic oil is minimum.If oil liquid temperature raises excessive, can rise too high by build-up of pressure, thus cause the fastening force of hydraulic nut to rise, likely cause the damage of the permanent deformation of bolt or even fastened equipment.
In current existing technological scheme, because maintainer cannot hot environment work long hours again, the general internal pressure superelevation adopting means such as isolation high temperature heat source or forced cooling etc. to prevent hydraulic nut.These class methods add the complexity of equipment, and unreliable.
Summary of the invention
In order to the problem of hydraulic nut fastening force superelevation used under solving long term high temperature environment, the utility model provides a kind of hydraulic nut with overpressure protection function.
The utility model solves the technological scheme that its technical problem adopts: a kind of hydraulic nut with overpressure protection function, comprise nut body and piston, described nut body one end face has a circle deep gouge, and the piston of cylindrical tube shape is slidably put in nut body deep gouge; Be active chamber between piston interior edge face and nut body, be fixed with one or more oil nozzle at nut body end face; Described oil nozzle is communicated with active chamber by the first duct be opened in nut body; Described nut body is fixed with the safety valve being communicated with active chamber; Described safety valve comprises the blind hole be opened on nut body, and blind via bottom has the second duct being communicated with active chamber, and the outer one end of blind hole is connected with a big nut; The outer one end of described blind hole has internal thread, and big nut external cylindrical surface has the outside thread coordinated with blind hole internal thread; Described big nut axle center has the tapped hole that runs through big nut, is provided with adjusting bolt in big nut tapped hole; Described adjusting bolt outer end is provided with the lock-nut for adjusting bolt being fixed on big nut; Described blind via bottom is provided with spool, between spool and adjusting bolt, be connected with spring; Described nut body also has and is communicated with blind hole and the 3rd extraneous duct.
It is further: the first described duct and the 3rd duct and nut body axis parallel; Described blind hole and nut body axis perpendicular; The second described vertical connection to the first duct, duct.
The second seal ring is provided with between described outside piston cylinder and nut body deep gouge; The first seal ring is provided with between described piston inner cylindrical surface and nut body deep gouge.
The utility model has set up safety valve on hydraulic nut, as the use of restriction working pressure.Compared with prior art, the beneficial effects of the utility model are: when the fluid of hydraulic nut inside to expand because operating ambient temperature is high build-up of pressure be elevated to certain value time, a part of fluid can discharge by safety valve, reduce oil liquid pressure, avoid the excessive equipment that causes of the fastening force of nut to damage, there is higher practicability.
Accompanying drawing explanation
Fig. 1 is sectional view of the present utility model;
Fig. 2 is the structural representation of safety valve;
Fig. 3 is the assembling schematic diagram of hydraulic nut when adjusting safety valve in actual use;
Fig. 4 is the assembling schematic diagram of hydraulic nut when as installed;
Fig. 5 is the assembling schematic diagram of hydraulic nut when reality is removed.
In figure: 1-piston; 2-first seal ring; 3-second seal ring; 4-nut body; 5-safety valve; 5a-adjusting bolt; 5b-lock-nut; 5c-big nut; 5d-spring; 5e-spool; 6-oil nozzle; 7-connecting thread; 8-first duct; 9-second duct; 10-the 3rd duct; 11-active chamber; 12-oil hydraulic pump; 13-oil sources safety valve; 14-pressure gauge; 15-selector valve.
Embodiment
Be below a specific embodiment of the present utility model, existing the utility model is described in further detail by reference to the accompanying drawings.
As shown in Figure 1, a kind of hydraulic nut with overpressure protection function, nut body 4 is provided with connecting thread 7, this screw thread and need the formation that matches of the bolt installed to be threaded; Piston 1 is slidably arranged in the circle deep gouge that is opened on nut body 4 interior edge face, and can axially move within the specific limits.Be provided with the second seal ring 3 between piston 1 external cylindrical surface and nut body 4 deep gouge, be provided with the first seal ring 2, first seal ring 2 between piston 1 inner cylindrical surface and nut body 4 deep gouge and the second seal ring 3 is arranged in the inner ring of piston 1 and the seal groove of outer shroud respectively.It is active chamber 11 between piston 1 interior edge face and nut body 4.Four oil nozzles 6 be evenly arranged along nut body 4 axle center are fixed in nut body 4 exterior edge face, one-way valve is had in oil nozzle 6, closed condition is under one-way valve nature, can be opened by outside connection, pass through oil nozzle, both the active chamber oiling of hydraulic nut be can give, the fluid in active chamber or air also can have been discharged.Oil nozzle 6 is communicated with active chamber 11 by the first duct 8 be opened in nut body 4, the first duct 8 and nut body 4 axis parallel.Nut body 4 is fixed with the safety valve 5 being communicated with active chamber 11, then shown in composition graphs 2, the blind hole on nut body 4, blind hole and nut body 4 axis perpendicular; Blind via bottom have connection first duct 8 with the second duct 9 of nut body 4 axis perpendicular, be provided with spool 5e between blind via bottom and the second duct 9 upper end-hole; The outer one end of blind hole is threaded connection and is fixed with a big nut 5c, and the outer one end of blind hole has internal thread, and big nut 5c external cylindrical surface has the outside thread coordinated with blind hole internal thread; Big nut 5c axle center has the tapped hole that runs through big nut 5c, is provided with adjusting bolt 5a in big nut 5c tapped hole; Adjusting bolt 5a outer end is provided with the lock-nut 5b for being fixed on by adjusting bolt 5a on big nut 5c; Spring 5d is connected with between spool 5e and adjusting bolt 5a; Nut body 4 also has and is communicated with blind hole and the 3rd extraneous duct, duct the 10, three 10 and nut body 4 axis parallel.
The adjustment of safety valve 5: according to the active area A of the fastened part maximum tolerance fastening force size Fmax of hydraulic nut and the piston 1 of known hydraulic nut, can calculate fluid working pressure Pmax under normal circumstances according to P=F/A.Be installed to by hydraulic nut on test stand, principle as shown in Figure 3.Oil hydraulic pump 12 provides high-voltage oil liquid for hydraulic nut.Oil sources safety valve 13, for the protection of oil hydraulic pump, avoids working pressure superelevation, and its setting value is higher than the setting value of the safety valve 5 of hydraulic nut.Pressure gauge 14 is for showing the working pressure of fluid.First, unscrew the lock-nut 5b of safety valve 5, adjustment adjusting nut 5a, observes pressure gauge 14 simultaneously, when adjusting pressure gauge 14 to show pressure being the Pmax of needs, stops adjusting, and screws lock-nut 5b, adjust complete.
As shown in Figure 4, the installation of hydraulic nut: 1, the active area A of the pretightening force size F of hydraulic nut as required and the piston 1 of known hydraulic nut, can calculate fluid working pressure P1 under normal circumstances according to P=F/A.2, confirm that piston 1 is retracted in nut body 4 completely, and nut is installed on bolt.3, oil sources is connected with certain oil nozzle 6 of nut, handles selector valve 15 and inject high-voltage oil liquid.If needed, the highest one of position in oil nozzle first should be selected to be exhausted operation, and then to carry out oil injection operation.High-voltage oil liquid enters the active chamber 11 of hydraulic nut.Now, the protruding and workpiece pressing of the piston 1 of nut.4, when pressure gauge 14 is shown to required pressure P1, stop oiling, remove hydraulic power and pressure gauge, complete the installation of nut.
As shown in Figure 5, the dismounting of hydraulic nut: 1, connects oil sources by oil nozzle 6, handles selector valve 15 and carries out pressure release oil extraction, remove the pretightening force of nut.2, nut is removed.3, make it to retract completely by applying suitable external force to the piston 1 of nut.
When causing hydraulic nut internal work oil liquid pressure to raise because of factors such as operating ambient temperature are high, the pressure of fluid acts on the end face of spool 5e of safety valve 5.When pressure exceedes certain value, spool 5e Compress Spring 5d and moving upward, a part of fluid is discharged in the second duct 9.Like this, just can ensure that the fluid working pressure of hydraulic nut is no more than certain value.Because the Young's modulus of fluid is very large, so very little through the fluid volume reality of safety valve 5 discharge, a few oil dripping liquid may be only had.
Claims (3)
1. with a hydraulic nut for overpressure protection function, comprise nut body (4) and piston (1), described nut body (4) end face has a circle deep gouge, and the piston (1) of cylindrical tube shape is slidably put in nut body (4) deep gouge; Be active chamber (11) between piston (1) interior edge face and nut body (4), be fixed with one or more oil nozzle (6) at nut body (4) end face; Described oil nozzle (6) is communicated with active chamber (11) by the first duct (8) be opened in nut body (4); It is characterized in that: on described nut body (4), be fixed with the safety valve (5) being communicated with active chamber (11); Described safety valve (5) comprises the blind hole be opened on nut body (4), and blind via bottom has the second duct (9) being communicated with active chamber (11), and the outer one end of blind hole is connected with a big nut (5c); The outer one end of described blind hole has internal thread, and big nut (5c) external cylindrical surface has the outside thread coordinated with blind hole internal thread; Described big nut (5c) axle center has the tapped hole that runs through big nut (5c), is provided with adjusting bolt (5a) in big nut (5c) tapped hole; Described adjusting bolt (5a) outer end is provided with the lock-nut (5b) for adjusting bolt (5a) being fixed on big nut (5c); Described blind via bottom is provided with spool (5e), is connected with spring (5d) between spool (5e) and adjusting bolt (5a); Described nut body (4) also has and is communicated with blind hole and the 3rd extraneous duct (10).
2. the hydraulic nut with overpressure protection function according to claim 1, is characterized in that: described the first duct (8) and the 3rd duct (10) and nut body (4) axis parallel; Described blind hole and nut body (4) axis perpendicular; Described the second duct (9) vertical connection to the first duct (8).
3. the hydraulic nut with overpressure protection function according to claim 1 and 2, is characterized in that: be provided with the second seal ring (3) between described piston (1) external cylindrical surface and nut body (4) deep gouge; The first seal ring (2) is provided with between described piston (1) inner cylindrical surface and nut body (4) deep gouge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520698379.8U CN204961530U (en) | 2015-09-10 | 2015-09-10 | Hydraulic nut with overpressure protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520698379.8U CN204961530U (en) | 2015-09-10 | 2015-09-10 | Hydraulic nut with overpressure protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204961530U true CN204961530U (en) | 2016-01-13 |
Family
ID=55056599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520698379.8U Expired - Fee Related CN204961530U (en) | 2015-09-10 | 2015-09-10 | Hydraulic nut with overpressure protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204961530U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314024A (en) * | 2017-08-24 | 2017-11-03 | 李树峰 | A kind of fastening assembly |
| CN107377650A (en) * | 2017-09-13 | 2017-11-24 | 大连康丰科技有限公司 | Continuous extruder hydraulic nut assembly with active safety protection |
| CN107401548A (en) * | 2017-08-10 | 2017-11-28 | 浙江恒成硬质合金有限公司 | A kind of hard alloy composite roll hydraulic nut |
| CN111408741A (en) * | 2020-04-02 | 2020-07-14 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
| CN114654288A (en) * | 2022-04-19 | 2022-06-24 | 广东海思智能装备有限公司 | Universal angle milling head component with micro-feeding function for numerical control machine tool |
-
2015
- 2015-09-10 CN CN201520698379.8U patent/CN204961530U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401548A (en) * | 2017-08-10 | 2017-11-28 | 浙江恒成硬质合金有限公司 | A kind of hard alloy composite roll hydraulic nut |
| CN107314024A (en) * | 2017-08-24 | 2017-11-03 | 李树峰 | A kind of fastening assembly |
| CN107377650A (en) * | 2017-09-13 | 2017-11-24 | 大连康丰科技有限公司 | Continuous extruder hydraulic nut assembly with active safety protection |
| CN111408741A (en) * | 2020-04-02 | 2020-07-14 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
| CN111408741B (en) * | 2020-04-02 | 2021-08-31 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
| CN114654288A (en) * | 2022-04-19 | 2022-06-24 | 广东海思智能装备有限公司 | Universal angle milling head component with micro-feeding function for numerical control machine tool |
| CN114654288B (en) * | 2022-04-19 | 2022-11-29 | 广东海思智能装备有限公司 | Universal angle milling head component with micro-feeding function for numerical control machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20160910 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |