CN203868006U - Hydraulic automatic pressure relieving device - Google Patents
Hydraulic automatic pressure relieving device Download PDFInfo
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- CN203868006U CN203868006U CN201420244242.0U CN201420244242U CN203868006U CN 203868006 U CN203868006 U CN 203868006U CN 201420244242 U CN201420244242 U CN 201420244242U CN 203868006 U CN203868006 U CN 203868006U
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Abstract
The utility model provides a hydraulic automatic pressure relieving device which mainly comprises a pilot-operated type unloading valve, a small energy accumulator and the like. The hydraulic automatic pressure relieving device can be conveniently mounted in a hydraulic system, is an economical, practical and novel hydraulic part combination device, can be reused, and can be well used to replace an overpressure explosion valve; and the pressure can be adjusted.
Description
Technical field
The utility model relates to a kind of hydraulic pressure automatic pressure relief device, and related technical field is mechanical-hydraulic engineering field, and it is used for the large-scale aerodynamic braking system of determining pitch wind power generating set as a kind of New casting die combination unit.
Background technique
The external large-scale and super-huge wind turbine component of Present Domestic is to determine pitch wind-powered electricity generation unit and Variable Pitch wind-powered electricity generation unit.Their aerodynamic braking system is different, and this patent " hydraulic pressure automatic pressure relief device " is for determining the hydraulic system of the aerodynamic braking system of pitch wind power generating set.For determining pitch wind-powered electricity generation unit, the blade of its wind wheel is comprised of main body and tip segment, and tip segment can be around a longitudinal shaft (blade tip axle) half-twist, and this rotating part is called blade tip flow spoiler.When unit is during in normal operating condition, under the effect of hydraulic system oil hydraulic cylinder oil pressure, blade tip flow spoiler and blade body part are critically combined into one, and form complete blade, play a part to absorb wind energy.When the wind wheel hypervelocity of blower fan and unit electric control system or hydraulic system have fault to need emergency braking, the oil pressure in oil hydraulic cylinder must fast automatic laying down, make blade tip flow spoiler rapid half-twist under the effect of its centrifugal force, form a damping plate, so that blower fan slows down fast, guarantee the safety of blower fan.
Current, domestic a lot of pitch wind-powered electricity generation unit of determining, in the hydraulic control system of its control blade tip flow spoiler, be provided with a superpressure explosive valve, when wind wheel hypervelocity needs emergency braking, drive oil pressure in the oil hydraulic cylinder of sharp flow spoiler to raise rapidly, when reaching the pressure of setting, the metal diaphragm of explosive valve breaks, and in oil hydraulic cylinder, oil pressure is laid down rapidly, damping plate is opened, and blower fan slows down fast.The shortcoming of this valve is disposable not re-usable, and in addition, its bursting pressure is again uncontrollable.
Summary of the invention
Goal of the invention: the utility model provides a kind of hydraulic pressure automatic pressure relief device, its objective is the existing not reproducible use of solution device in the past and the uncontrollable problem of bursting pressure.
Technological scheme:
A hydraulic pressure automatic pressure relief device, is characterized in that: this device comprises contiguous block, unloading valve, accumulator, fuel outlet valve and pressure measuring tie-in; Unloading valve is fixed on contiguous block, and accumulator utilizes pipe joint to be connected with contiguous block, and fuel outlet valve adopts cartridge throttle valve, is connected threadably with contiguous block, and pressure measuring tie-in directly screws on contiguous block.
In unloading valve, be provided with asphalt channel, plunger, pilot valve, one-way valve and main valve plug, asphalt channel comprises main oil channel channel, oil circuit control passage and drainback passage, main oil channel channel is communicated with oil circuit control passage and drainback passage, oil circuit control passage is connected with the entrance of accumulator, pressure measuring tie-in and fuel outlet valve by outlet on the one hand, be communicated with the left chamber of plunger on the other hand, on the pipeline before oil circuit control passage leads to one-way valve outlet and plunger, one-way valve be set; The right chamber of plunger is communicated with the left chamber of pilot valve, pilot valve is arranged on drainback passage, control the switching of drainback passage, drainback passage is through unloading valve and at two ends, respectively have a return opening, a return opening is connected to oil sump tank, another return opening is communicated with the outlet of fuel outlet valve, and pilot valve is arranged on the position being communicated with the outlet of fuel outlet valve;
Main oil channel channel is communicated with the right chamber of plunger, and the ingress that leads to drainback passage at main oil channel channel is provided with the main valve plug of controlling this entrance switching, is provided with damping hole in main valve plug, and damping hole is communicated with the right chamber of plunger.
Advantage and effect: the utility model provides a kind of hydraulic pressure automatic pressure relief device, this device is mainly to consist of parts such as a piloted unload valve and small-sized accumulators, and it can be arranged in hydraulic system and pressure regulation convenience easily, is a kind of economy, practicality, novel hydraulic parts combination unit.
Reusable and the pressure of the utility model can regulate, and can well be used for substituting above-mentioned superpressure explosive valve.
accompanying drawing explanation:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model oil circuit figure;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the plan view of Fig. 3.
embodiment:below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, the utility model provides a kind of hydraulic pressure automatic pressure relief device, and this device comprises contiguous block 1, unloading valve 2, accumulator 3, fuel outlet valve 4 and pressure measuring tie-in 5; Unloading valve 2 is fixed on contiguous block 1, and accumulator 3 utilizes pipe joint to be connected with contiguous block 1, and fuel outlet valve 4 adopts cartridge throttle valve, is connected threadably with contiguous block 1, and pressure measuring tie-in 5 directly screws on contiguous block 1.Contiguous block 1 has four fixing screw holes.
As shown in Figure 2, in unloading valve 2, be provided with asphalt channel, plunger 7, pilot valve 10, one-way valve 6 and main valve plug 8, asphalt channel comprises main oil channel channel, oil circuit control passage and drainback passage, main oil channel channel is communicated with through corresponding valve with oil circuit control passage and drainback passage, oil circuit control passage is connected with the entrance of accumulator 3, pressure measuring tie-in 5 and fuel outlet valve 4 by outlet B on the one hand, be communicated with the left chamber of plunger 7 on the other hand, on the pipeline before oil circuit control passage leads to one-way valve outlet B and plunger 7, one-way valve 6 be set; The right chamber of plunger 7 is communicated with the left chamber of pilot valve 10, pilot valve 10 is arranged on to be controlled drainback passage and opens and closes on drainback passage, drainback passage is through unloading valve 2 and at two ends, respectively have a return opening O, a return opening is connected to oil sump tank 12, another return opening is communicated with the outlet of fuel outlet valve 4, and pilot valve 10 is arranged on the position being communicated with the outlet of fuel outlet valve 4;
Main oil channel channel is communicated with the right chamber of plunger 7, and the ingress that leads to drainback passage at main oil channel channel is provided with the main valve plug 8 of controlling this entrance switching, is provided with damping hole 9 in main valve plug 8, and damping hole 9 is communicated with the right chamber of plunger 7.
In Fig. 2, be the hydraulic circuit figure of this device, the oil of the hyperbaric chamber 13 of the oil hydraulic cylinder of driving blade tip flow spoiler is connected with the main oil channel channel entrance P mouth of unloading valve through contiguous block, and the return opening O of unloading valve communicates with oil sump tank 12 through contiguous block.
Working principle: this device is a kind of valve group of automatic pressure-relieving, its effect is that unloading valve will, automatically without pressurized overflow, make hyperbaric chamber release completely when the pressure of hyperbaric chamber 13 surpasses the setup pressure value of pressure adjusting spring.
As seen from Figure 2, the oil content of main oil channel channel entrance P mouth becomes two-way, and a road is to one-way valve 6, out afterwards to the left chamber of plunger 7 with enter in accumulator 3, separately leads up to the damping hole 9 of main valve plug 8 to the left chamber of pilot valve 10 and the right chamber of plunger 7, when the oil pressure of hyperbaric chamber raises, but while not yet reaching the setup pressure value of pressure adjusting spring 11, now pilot valve 10 is not opened, and main valve plug 8 is in closed condition under the effect of Returnning spring power, and while plunger 7 is also in state of equilibrium, when the oil pressure of hyperbaric chamber 13 raises while reaching the setup pressure value higher than pressure adjusting spring 11, now pilot valve 10 is opened, the fluid of hyperbaric chamber flows back to O chamber through the damping hole 9 of main valve plug 8 to the valve port of pilot valve 10, due to fluid flowing by damping hole 9, at main valve plug, Shang Xia 8, produced pressure difference in two ends, therefore make main valve plug 8 open, unlatching due to pilot valve 10 makes plunger 7 two ends, left and right also produce pressure difference again, and the effective active area of plunger 7 is greater than the effective active area that guide's pilot valve 10 is opened pilot valve 10 open valves 10, plunger 7 additionally forces in pilot valve 10, its power is greater than again the setup pressure value of pressure adjusting spring 11, so just strengthened the opening amount of pilot valve 10, thereby make the opening amount of main valve plug 8 maximum, the oil of hyperbaric chamber is just without pressurized overflow.Owing to entering hydraulic oil in accumulator 3 without leakage, oil pressure remains, the extra active force of plunger 7 exists always, so the opening of main valve plug 8 also opens always, and opening amount is maximum, has reached like this object of the complete release of hyperbaric chamber.
The application's feature
1) it is an automatic safe protective device, when the wind wheel hypervelocity of wind-powered electricity generation unit and electric control system break down, by the release of this device, the damping plate of blower fan blade tip flow spoiler is opened automatically, makes the braking of blower fan automatic retarding;
2) compare with superpressure explosive valve, this device can be reused (open the oil that fuel outlet valve bleeds off in accumulator 3 and install reset), and pressure unloading can conveniently regulate, and is very practical;
3) this apparatus structure is compact novel, all adopts normal component, reliable operation, and manufacturing and installation are easily;
4) this device can expand application area, for there being the field of the complete release of pressure vessel.
Claims (2)
1. a hydraulic pressure automatic pressure relief device, is characterized in that: this device comprises contiguous block (1), unloading valve (2), accumulator (3), fuel outlet valve (4) and pressure measuring tie-in (5); Unloading valve (2) is fixed on contiguous block (1), accumulator (3) utilizes pipe joint to be connected with contiguous block (1), fuel outlet valve (4) adopts cartridge throttle valve, is connected threadably with contiguous block (1), and pressure measuring tie-in (5) directly screws on contiguous block (1).
2. hydraulic pressure automatic pressure relief device according to claim 1, it is characterized in that: unloading valve is provided with asphalt channel in (2), plunger (7), pilot valve (10), one-way valve (6) and main valve plug (8), asphalt channel comprises main oil channel channel, oil circuit control passage and drainback passage, main oil channel channel is communicated with oil circuit control passage and drainback passage, oil circuit control passage is on the one hand by outlet (B) and accumulator (3), the entrance of pressure measuring tie-in (5) and fuel outlet valve (4) connects, be communicated with the left chamber of plunger (7) on the other hand, at oil circuit control passage, lead on one-way valve outlet (B) and plunger (7) pipeline before one-way valve (6) is set, the right chamber of plunger (7) is communicated with the left chamber of pilot valve (10), pilot valve (10) is arranged on drainback passage, control the switching of drainback passage, drainback passage is through unloading valve (2) and at two ends, respectively have a return opening (O), a return opening is connected to oil sump tank (12), another return opening is communicated with the outlet of fuel outlet valve (4), and pilot valve (10) is arranged on the position being communicated with the outlet of fuel outlet valve (4),
Main oil channel channel is communicated with the right chamber of plunger (7), the ingress that leads to drainback passage at main oil channel channel is provided with the main valve plug (8) of controlling this entrance switching, in main valve plug (8), be provided with damping hole (9), damping hole (9) is communicated with the right chamber of plunger (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244242.0U CN203868006U (en) | 2014-05-14 | 2014-05-14 | Hydraulic automatic pressure relieving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244242.0U CN203868006U (en) | 2014-05-14 | 2014-05-14 | Hydraulic automatic pressure relieving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203868006U true CN203868006U (en) | 2014-10-08 |
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ID=51648965
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420244242.0U Expired - Fee Related CN203868006U (en) | 2014-05-14 | 2014-05-14 | Hydraulic automatic pressure relieving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203868006U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595256A (en) * | 2014-12-31 | 2015-05-06 | 中国煤炭科工集团太原研究院有限公司 | Novel energy accumulator automatic unloading device of coal mine underground explosion-proof vehicle |
| CN108381965A (en) * | 2017-12-15 | 2018-08-10 | 沈阳工业大学 | A kind of bridge-cut-off aluminium alloy pneumatic stamping machine |
-
2014
- 2014-05-14 CN CN201420244242.0U patent/CN203868006U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595256A (en) * | 2014-12-31 | 2015-05-06 | 中国煤炭科工集团太原研究院有限公司 | Novel energy accumulator automatic unloading device of coal mine underground explosion-proof vehicle |
| CN104595256B (en) * | 2014-12-31 | 2017-01-25 | 中国煤炭科工集团太原研究院有限公司 | Novel energy accumulator automatic unloading device of coal mine underground explosion-proof vehicle |
| CN108381965A (en) * | 2017-12-15 | 2018-08-10 | 沈阳工业大学 | A kind of bridge-cut-off aluminium alloy pneumatic stamping machine |
| CN108381965B (en) * | 2017-12-15 | 2023-09-22 | 沈阳工业大学 | Pneumatic punching machine for broken bridge aluminum alloy section bar |
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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: 20141008 Termination date: 20160514 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |