CN203783879U - Pressure release valve of hydraulic pump - Google Patents
Pressure release valve of hydraulic pump Download PDFInfo
- Publication number
- CN203783879U CN203783879U CN201320858726.XU CN201320858726U CN203783879U CN 203783879 U CN203783879 U CN 203783879U CN 201320858726 U CN201320858726 U CN 201320858726U CN 203783879 U CN203783879 U CN 203783879U
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- China
- Prior art keywords
- valve
- ball valve
- hydraulic pump
- valve body
- decompression valves
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000012530 fluid Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 230000006837 decompression Effects 0.000 claims description 31
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model belongs to the technical field of hydraulic pumps, and particularly relates to a pressure release valve of a hydraulic pump. A hydraulic fluid space used for liquid pressurization is formed in the hydraulic pump. The pressure release valve comprises a valve body, an elastic part and a valve plug, wherein the valve body is a hollow shell, a first pressure release opening is formed in the upper portion of the valve body, communicated with a pressure inlet of the hydraulic fluid space and close to the pressure inlet, the elastic part is installed in the valve body, and a second pressure release opening is formed in the valve body and located below the first pressure release opening. The pressure release valve further comprises a ball valve arranged above the elastic part, the valve plug is arranged above the ball valve, the valve plug seals the pressure inlet and the first pressure release opening, a through hole is formed in the valve plug, one end of the through hole is provided with the top end communicated with the pressure inlet, and the other end of the through hole is provided with the bottom end sealed by the ball valve. The pressure release valve can ensure safe work of the hydraulic pump whether the valve plug slides normally or is stuck.
Description
Technical field
The utility model belongs to oil hydraulic pump technical field, relates in particular to a kind of Decompression valves of oil hydraulic pump.
Background technique
See Fig. 1, this is a kind of oil hydraulic pump 1, belongs to internal-gear type oil hydraulic pump, comprises hollow casing 11, is arranged on the external rotor 12 in hollow casing 11 and is arranged on the internal rotor 13 in external rotor 12, external rotor 12 is provided with in multiple and connects latch, and internal rotor 13 is provided with multiple external latches.Between external rotor 12 and internal rotor 13, be formed with a hydraulic fluid space 14, drive unit drives internal rotor 13 to rotate, internal rotor 13 drives synchronizes with the external rotor 12 of its engagement while rotation, can change the volume of hydraulic fluid space 14, the liquid of liquid storage tank (not shown in FIG.) can enter hydraulic fluid space 14 by the suction port of housing 11 111, along with external rotor 12 and internal rotor 13 extruding are passed, liquid is discharged by the exhaust port 112 of housing 11 again.When rise of rotational speed, the free air space of drive unit are limited, the quality of the reduced cross-sectional of path, liquid or operating temperature be while changing, the pressure of liquid in hydraulic fluid space 14 and follow-up hydraulic path also can be affected.If the pressure of liquid is excessive, will cause housing 11 or the blast of whole hydraulic system, therefore, a Decompression valves can be set in oil hydraulic pump 1 conventionally.
See Fig. 2, common Decompression valves 15 comprises a valve body 151, valve body 151 be provided be communicated with hydraulic fluid space 14 enter to press mouthfuls 152, valve body 151 is also provided with pressure relief opening 153.Decompression valves 15 also comprises and is arranged on the spring seat 154 of valve body 1 bottom, the spring 155 that is arranged at spring seat 154 and valve plug 156, and valve plug 156 seals into pressure mouth 152 and pressure relief opening 153 under the effect of spring 155.
See Fig. 3, when the hydraulic pressure of hydraulic fluid space 14 exceedes certain predetermined value, be that pressure that liquid produces is while being greater than the pressure that spring 155 and valve plug 156 can bear, liquid can promote valve plug 156 and move down, and makes to be communicated with pressure relief opening 153 into pressure mouth 152, and the partially liq in hydraulic fluid space 14 can be through entering to press mouth 152, flow out from pressure relief opening 153 again, Compress Spring 155 simultaneously, so, can reduce the hydraulic pressure of hydraulic fluid space 14.In the time that hydraulic recovery is normal, when the pressure that liquid produces approximates the elastic force of spring 155, spring push valve plug 156, and then seal into pressure mouth 152 and pressure relief opening 153, as shown in Figure 2.Therefore, Decompression valves 15 can, under oil hydraulic pump 1 keeps certain pressure, ensure oil hydraulic pump 1 trouble free service.
Although, the hydraulic pressure of common Decompression valves 15 energy timely adjustment hydraulic fluid spaces 14, but also there is following several problem: for fear of under normal state, liquid is leaked by gap 16 between valve plug 156 and valve body 151, and the gap 16 between valve plug 156 and valve body 151 is smaller.Oil hydraulic pump 1 in the course of the work, due to liquid inferior quality or mechanical friction meeting generation impurity, in the time that the particle diameter of impurity is greater than the width in gap 16, impurity is gathered in gap 16 in a large number, valve plug 156 can be stuck in valve body 151 and cannot move, and makes Decompression valves 15 lose the function that regulates pressure, therefore, in the time that the pressure of hydraulic fluid space 14 is excessive, still there is the danger of blast in oil hydraulic pump 1.
Model utility content
The purpose of this utility model is to provide for the deficiencies in the prior art a kind of Decompression valves of oil hydraulic pump, when valve plug is stuck can not move time, if the hydraulic pressure value in hydraulic fluid space is greater than normal value, the pressure that liquid produces can push away via bottoms by ball valve, make liquid from entering to press a mouthful via through holes to be expelled to outside valve body by the second pressure relief opening again, overcome the deficiency of existing Decompression valves.
For achieving the above object, the utility model adopts following technological scheme: a kind of Decompression valves of oil hydraulic pump, described oil hydraulic pump is provided with the hydraulic fluid space for liquid supercharging, described Decompression valves comprises valve body, elastic component and valve plug, described valve body is hollow casing, described valve body top be provided be communicated with described hydraulic fluid space enter to press mouthful and near described in the first pressure relief opening of entering to press mouthful, described elastic component is installed in described valve body; Described valve body is provided with the second pressure relief opening below described the first pressure relief opening, described Decompression valves also comprises ball valve, described ball valve is arranged at described elastic component top, described valve plug is arranged on described ball valve top, and, described in sealing, described valve plug enters to press mouth and described the first pressure relief opening, and described valve plug is provided with through hole, described through hole one end is provided with the top that enters to press described in connection mouthful, and the other end is provided with by the bottom of described ball valve blocking.
Described valve body comprises the upper cylinder of hollow, lower prop and the diapire of hollow, described upper cylinder is communicated with described hydraulic fluid space, described lower prop is connected with described upper cylinder, described diapire is connected in the bottom of described lower prop, described the first pressure relief opening is arranged at the sidewall of described upper cylinder, and described the second pressure relief opening is arranged at the sidewall of described lower prop.
The internal diameter of described upper cylinder is less than the internal diameter of described lower prop, between described lower prop and described upper cylinder, forms a shoulder.
Described Decompression valves also comprises ball valve seat, and described ball valve seat is arranged at elastic component top, and described ball valve is arranged at ball valve seat top.
Described elastic component is set to Compress Spring, be installed in described valve body, and described elastic component one end contacts with diapire, and the other end contacts with described ball valve seat.
Described ball valve seat is set to the bowl-shaped shell of upward opening.
Described valve plug is arranged in valve body, and is positioned at described ball valve top, and described valve plug comprises seal section and spacing section, described seal section stretches into described upper cylinder, and described in sealing, enter to press mouth and the first pressure relief opening, described spacing section is positioned at described lower prop, and is resisted against described shoulder.
The bottom of described spacing section is formed with from the lower conical surface toward upwards shrinking to centre gradually, and the bottom of described through hole is formed at the central authorities of the described conical surface, and described ball valve contact is limited in the below of the described conical surface.
The beneficial effects of the utility model: when the hydraulic pressure value in hydraulic fluid space is during in normal range (NR), valve plug seals into pressure mouth and the first pressure relief opening, and ball valve blocking is in the bottom of through hole, so that through hole is not communicated with the second pressure relief opening.In the time that the hydraulic pressure value in hydraulic fluid space is greater than normal value, valve plug and ball valve are subject to the extruding of liquid and move down, make liquid be expelled to liquid bath through the first pressure relief opening from entering pressure mouthful, for reducing the hydraulic pressure in hydraulic fluid space, elastic component is compressed simultaneously, in the time that hydraulic pressure value is recovered normal value, valve plug and ball valve are upwards supported reset by elastic component.When valve plug is stuck can not move time, if the hydraulic pressure value in hydraulic fluid space is greater than normal value, the pressure that liquid produces can push away via bottoms by ball valve, and liquid can, from entering to press a mouthful via through holes to be expelled to outside valve body by the second pressure relief opening again, be realized and regulate hydraulic pressure object.Therefore, the utility model not only can ensure oil hydraulic pump trouble free service in the time that valve plug normally slides, and can also in the time that valve plug is stuck, ensure oil hydraulic pump trouble free service.
Brief description of the drawings
Fig. 1 is the structural representation of common oil hydraulic pump.
Fig. 2 is the structural representation of common Decompression valves.
Fig. 3 is the common Decompression valves structural representation under pressure regulation state.
Fig. 4 is structural representation of the present utility model.
Fig. 5 is the utility model structural representation under the first pressure regulation state in the time that pressure is excessive.
Fig. 6 is the utility model structural representation under the second pressure regulation state in the time that pressure is excessive.
Fig. 1 to Fig. 6 comprises:
1---oil hydraulic pump, 11---hollow casing, 111---suction port, 112---exhaust port, 12---external rotor, 13---internal rotor, 14---hydraulic fluid space, 15---Decompression valves, 151---valve body, 152---enter to press mouth, 153---pressure relief opening, 154---spring seat, 155---spring, 156---valve plug, 16---gap, 2---oil hydraulic pump, 21---hydraulic fluid space, 3---valve body, 31---upper cylinder, 32---lower prop, 33---diapire, 34---enter to press mouth, 35---the first pressure relief opening, 36---the second pressure relief opening, 37---shoulder, 4---elastic component, 5---ball valve seat, 6---ball valve, 7---valve plug, 71---seal section, 72---spacing section, 73---the conical surface, 74---through hole, 741---top, 742---bottom.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited to this.
See Fig. 4, a kind of Decompression valves of oil hydraulic pump, the utility model is applied in oil hydraulic pump 2, oil hydraulic pump 2 is provided with the hydraulic fluid space 21 for liquid supercharging, Decompression valves comprises valve body 3, elastic component 4 and valve plug 7, valve body 3 is hollow casing, valve body 3 tops be provided be communicated with hydraulic fluid space 21 enter to press mouthfuls 34 and near the first pressure relief opening 35 that enters to press mouthfuls 34, elastic component 4 is installed in valve body 3; Valve body 3 is provided with the second pressure relief opening 36 below the first pressure relief opening 35, Decompression valves also comprises ball valve 6, ball valve 6 is arranged at elastic component 4 tops, valve plug 7 is arranged on ball valve 6 tops, and valve plug 7 seals into pressure mouth 34 and the first pressure relief opening 35, valve plug 7 is provided with through hole 74, through hole 74 one end are provided with the top 741 being communicated with into pressure mouth 34, and the other end is provided with by the bottom 742 of ball valve 7 blockings.
Valve body 3 comprises the upper cylinder 31 of hollow, lower prop 32 and the diapire 33 of hollow, upper cylinder 31 is communicated with hydraulic fluid space 21, lower prop 32 is connected with upper cylinder 31, diapire 33 is connected in the bottom of lower prop 32, the first pressure relief opening 35 is arranged at the sidewall of cylinder 31, and the second pressure relief opening 36 is arranged at the sidewall of lower prop 32.
The internal diameter of upper cylinder 31 is less than the internal diameter of lower prop 32, forms a shoulder 37 between lower prop 32 and upper cylinder 31.
Decompression valves also comprises ball valve seat 5, and ball valve seat 5 is arranged at elastic component 4 tops, and ball valve 6 is arranged at ball valve seat 5 tops.
Elastic component 4 is set to Compress Spring, be installed in valve body 3, and elastic component 4 one end contacts with diapire 33, and the other end contacts with ball valve seat 5.
Ball valve seat 5 is set to the bowl-shaped shell of upward opening, and in the time that ball valve 6 is arranged at ball valve seat 5, ball valve seat 5 can play spacing effect.
Valve plug 7 is arranged in valve body 1, and is positioned at ball valve 6 tops, and valve plug 7 comprises seal section 71 and spacing section 72, and seal section 71 stretches into cylinder 31, and seals into pressure mouth 34 and the first pressure relief opening 35, and spacing section 72 is positioned at lower prop 32, and is resisted against shoulder 37.
The bottom of spacing section 72 is formed with from the lower conical surface 73 toward upwards shrinking to centre gradually, and the bottom 742 of through hole 74 is formed at the central authorities of the conical surface 73, and ball valve 7 contacts are limited in the below of the conical surface 73.
See Fig. 4, when the hydraulic pressure value in hydraulic fluid space 21 is during in normal range (NR), valve plug 7 seals into pressure mouth 34 and the first pressure relief opening 35, so that enter to press mouth 34 not to be communicated with the first pressure relief opening 35, ball valve 6 is that contact is at the conical surface 73, and blocking, in the bottom 742 of through hole 74, is not communicated with through hole 74 with the second pressure relief opening 36.
See Fig. 5, in the time that the hydraulic pressure value in hydraulic fluid space 21 is greater than normal value, valve plug 7 and ball valve 6 are subject to the extruding of liquid and move down, make liquid be expelled to liquid bath through the first pressure relief opening 35 from entering pressure mouth 34, so can reduce the hydraulic pressure in hydraulic fluid space 21, elastic component 4 is compressed simultaneously, in the time that hydraulic pressure value is recovered normal value, valve plug 7 and ball valve 6 are upwards supported reset by elastic component 4, and valve plug 7 seals again into pressure mouth 34 and the first pressure relief opening 35.Above-mentioned pressure regulation is the first pressure regulation of the present utility model.
See Fig. 6, when valve plug 7 is stuck can not move time, if the hydraulic pressure value in hydraulic fluid space 21 is greater than normal value, the pressure that liquid produces can push away ball valve 6 bottom 742 of through hole 74, liquid can, from entering to press mouthful 34 via through holes 74 to be expelled to outside valve body 7 by the second pressure relief opening 36 again, be realized and regulate hydraulic pressure object.Above-mentioned pressure regulation is the second pressure regulation of the present utility model.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change and revise above-mentioned mode of execution.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement, replacement or modification that every those skilled in the art have done on basis of the present utility model all belong to protection domain of the present utility model.In addition,, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (8)
1. the Decompression valves of an oil hydraulic pump, described oil hydraulic pump is provided with the hydraulic fluid space for liquid supercharging, described Decompression valves comprises valve body, elastic component and valve plug, described valve body is hollow casing, described valve body top be provided be communicated with described hydraulic fluid space enter to press mouthful and near described in the first pressure relief opening of entering to press mouthful, described elastic component is installed in described valve body; It is characterized in that: described valve body is provided with the second pressure relief opening below described the first pressure relief opening, described Decompression valves also comprises ball valve, described ball valve is arranged at described elastic component top, described valve plug is arranged on described ball valve top, and, described in sealing, described valve plug enters to press mouth and described the first pressure relief opening, and described valve plug is provided with through hole, described through hole one end is provided with the top that enters to press described in connection mouthful, and the other end is provided with by the bottom of described ball valve blocking.
2. the Decompression valves of oil hydraulic pump according to claim 1, it is characterized in that: described valve body comprises the upper cylinder of hollow, lower prop and the diapire of hollow, described upper cylinder is communicated with described hydraulic fluid space, described lower prop is connected with described upper cylinder, described diapire is connected in the bottom of described lower prop, described the first pressure relief opening is arranged at the sidewall of described upper cylinder, and described the second pressure relief opening is arranged at the sidewall of described lower prop.
3. the Decompression valves of oil hydraulic pump according to claim 2, is characterized in that: the internal diameter of described upper cylinder is less than the internal diameter of described lower prop, between described lower prop and described upper cylinder, forms a shoulder.
4. the Decompression valves of oil hydraulic pump according to claim 2, is characterized in that: described Decompression valves also comprises ball valve seat, and described ball valve seat is arranged at elastic component top, and described ball valve is arranged at ball valve seat top.
5. the Decompression valves of oil hydraulic pump according to claim 4, is characterized in that: described elastic component is set to Compress Spring, be installed in described valve body, and described elastic component one end contacts with diapire, and the other end contacts with described ball valve seat.
6. the Decompression valves of oil hydraulic pump according to claim 4, is characterized in that: described ball valve seat is set to the bowl-shaped shell of upward opening.
7. the Decompression valves of oil hydraulic pump according to claim 3, it is characterized in that: described valve plug is arranged in valve body, and be positioned at described ball valve top, described valve plug comprises seal section and spacing section, described seal section stretches into described upper cylinder, and described in sealing, enter to press mouth and the first pressure relief opening, described spacing section is positioned at described lower prop, and is resisted against described shoulder.
8. the Decompression valves of oil hydraulic pump according to claim 7, it is characterized in that: the bottom of described spacing section is formed with from the lower conical surface toward upwards shrinking to centre gradually, the bottom of described through hole is formed at the central authorities of the described conical surface, and described ball valve contact is limited in the below of the described conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858726.XU CN203783879U (en) | 2013-12-25 | 2013-12-25 | Pressure release valve of hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858726.XU CN203783879U (en) | 2013-12-25 | 2013-12-25 | Pressure release valve of hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783879U true CN203783879U (en) | 2014-08-20 |
Family
ID=51320072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320858726.XU Expired - Lifetime CN203783879U (en) | 2013-12-25 | 2013-12-25 | Pressure release valve of hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922099A (en) * | 2018-07-17 | 2018-11-30 | 无锡南理工科技发展有限公司 | A kind of fire-fighting prior-warning device and its application method based on Internet of Things |
| CN114857023A (en) * | 2022-04-26 | 2022-08-05 | 安徽理工大学 | Pressurization anti-reflux type water pump |
-
2013
- 2013-12-25 CN CN201320858726.XU patent/CN203783879U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922099A (en) * | 2018-07-17 | 2018-11-30 | 无锡南理工科技发展有限公司 | A kind of fire-fighting prior-warning device and its application method based on Internet of Things |
| CN114857023A (en) * | 2022-04-26 | 2022-08-05 | 安徽理工大学 | Pressurization anti-reflux type water pump |
| CN114857023B (en) * | 2022-04-26 | 2023-09-08 | 安徽理工大学 | Pressurized anti-countercurrent water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Patentee after: SKS HYDRAULIC TECHNOLOGY CO.,LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315000 Street No. 195 Patentee before: NINGBO WIDE SKY SKS HYDRAULIC Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140820 |
|
| CX01 | Expiry of patent term |