CN209673307U - Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device - Google Patents
Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device Download PDFInfo
- Publication number
- CN209673307U CN209673307U CN201920725574.3U CN201920725574U CN209673307U CN 209673307 U CN209673307 U CN 209673307U CN 201920725574 U CN201920725574 U CN 201920725574U CN 209673307 U CN209673307 U CN 209673307U
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- CN
- China
- Prior art keywords
- helium
- sealing ring
- cavity
- hole
- pump housing
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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.)
- Withdrawn - After Issue
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 239000000446 fuel Substances 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 title claims abstract description 13
- 239000007924 injection Substances 0.000 title claims abstract description 13
- 239000001307 helium Substances 0.000 claims abstract description 85
- 229910052734 helium Inorganic materials 0.000 claims abstract description 85
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 85
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 71
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 40
- 239000011148 porous material Substances 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model relates to arrive a kind of fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device, including an airtight cavity, the first sealing ring is provided in one planar inner wall of cavity, second sealing ring, first sealing ring, second sealing ring, cavity wall, the pump housing and bushing surround one jointly and closed fill helium space, helium hole is offered in cavity wall between first sealing ring and the second sealing ring, helium hole is connected to by helium tube with helium feedway, nitrogen pore is offered in the cavity wall of second sealing ring periphery, vacuumize hole, detection hole, nitrogen pore is connected to by nitrogen tube with nitrogen feedway, hole is vacuumized to be connected to by vacuum-pumping tube with vacuum evacuation device, detection hole is connected to by detection pipe with helium detection device.By being filled with helium to filling in helium space, whether containing helium whether there is gas leak phenomenon in the inside cavity gas that then fills other than helium space by the detection of helium detection device with the joint face judged between bushing and pump housing axis hole.
Description
Technical field:
The utility model relates to a kind of air-tightness detection device, be especially applied to detection fuel injection pump pump housing axis hole with
Bushing joint face air-tightness detection device.
Background technique:
Multiple tracks oil circuit and an axis hole are provided in the fuel injection pump pump housing, axis hole outer end is plugged with a bushing, bushing
With axis hole tight fit, since fuel oil will be full of in the pump housing, therefore it is required that without gas leak phenomenon between liner outer wall and shaft hole inner wall,
Therefore air-leakage test is carried out to fuel injection pump pump housing axis hole and bushing joint face, but there is no corresponding devices to use at present
In the realization detection.
Utility model content:
The technical problem to be solved by the utility model is to provide a kind of fuel injection pump pump housing axis holes and bushing joint face
Air-tightness detection device.
In order to solve the above technical problems, the technical solution adopted in the utility model is: fuel injection pump pump housing axis hole and lining
Cover joint face air-tightness detection device, which is characterized in that including an airtight cavity to be opened/closed, a planar inner wall of cavity
On be provided with bushing bared end end face cooperation the first sealing ring, the second sealing ring positioned at the first sealing ring periphery, second
Sealing ring is corresponding with the pump body end surface of bushing bared end periphery, is equipped in the cavity and applies stressed pressing device to the pump housing,
Pressing device seals against bushing bared end end face with the first sealing ring, while the pump body end surface of bushing bared end periphery and
Two sealing rings abut, and first sealing ring, the second sealing ring, cavity wall, the pump housing and bushing surround one jointly and closed fill
Helium space offers several connection cavity external worlds in the cavity wall between the first sealing ring and the second sealing ring and fills helium space
Helium hole, helium hole are connected to by helium tube with helium feedway, offer several in the cavity wall of the second sealing ring periphery
Nitrogen pore, several vacuumize hole and a detection hole, the cavity passes through nitrogen pore and the nitrogen being connected on nitrogen pore
Tracheae is connected to the nitrogen feedway in the cavity external world, and the cavity is by vacuumizing hole and being connected to the pumping vacuumized on hole
Vacuum tube is connected to the vacuum evacuation device in the cavity external world, the detection that the cavity also passes through detection hole and is connected in detection hole
Pipe is connected to the helium detection device in the cavity external world.
As a preferred embodiment, the cavity include coaming plate under bottom plate, the annular for being fixedly connected on bottom plate upper surface, can
Releasably be sealedly connected on the top cover of lower coaming plate upper end, top cover lower edge on lower coaming plate along opposite, it is fixed above the top cover
It is provided with linear drive apparatus, linear drive apparatus connect with top cover and top cover is driven to move up and down to open or close cavity,
Jacking block is provided on top cover inner top surface, for holding out against the pump housing, first sealing ring, the second sealing ring are fixedly connected with jacking block
On bottom plate, the nitrogen pore vacuumizes hole and detection hole and is provided on lower coaming plate.
As a preferred embodiment, two positioning are provided on the bottom plate between the second sealing ring and lower coaming plate
Two location holes of column, two positioning columns and the pump housing correspond.
As a preferred embodiment, the helium tube, nitrogen tube, vacuum-pumping tube, be respectively arranged with shut-off valve in detection pipe.
The beneficial effects of the utility model are: the utility model is by by the annular joint face between bushing and pump housing axis hole
The first sealing ring is respectively adopted positioned at the interior outside of pump housing outer end and the second sealing ring is sealed with cavity wall and docks, utilizes first
The end face of sealing ring, the second sealing ring, the cavity wall of cavity and the pump housing and bushing constitute one it is closed fill helium space, pass through
It is filled in helium space to this and is filled with helium, then detected by helium detection device in the inside cavity gas other than the second sealing ring
Whether containing helium whether there is gas leak phenomenon with the annular joint face judged between bushing and pump housing axis hole, due to filling helium space
Volume is very small, therefore very low to the consumption of helium, and this detection method is at low cost, and precision is high, effective guarantee product quality.
Detailed description of the invention:
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the portion the A enlarged drawing in Fig. 1；
Fig. 3 is the portion the B enlarged drawing in Fig. 2.
In FIG. 1 to FIG. 3: 1, cavity, 101, bottom plate, 102, lower coaming plate, 103, top cover, 104, jacking block, 2, bushing, 3, first
Sealing ring, the 4, second sealing ring, 5, the pump housing, 501, location hole, 6, pressing device, 7, helium hole, 8, helium tube, 9, helium supply
Device, 10, nitrogen pore, 11, vacuumize hole, 12, detection hole, 13, nitrogen tube, 14, nitrogen feedway, 15, vacuum-pumping tube,
16, vacuum evacuation device, 17, detection pipe, 18, helium detection device, 19, linear drive apparatus, 20, positioning column, 21, shut-off valve,
22, bracket, 23, support frame, 24, groove, 25, third sealing ring, 26, fill helium space.
Specific embodiment:
With reference to the accompanying drawing, the specific embodiment of the utility model is described in detail.
As shown in FIG. 1 to 3, fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device, including one
Airtight cavity 1 to be opened/closed is provided with the first sealing with the cooperation of 2 bared end end face of bushing in a planar inner wall of cavity 1
Circle 3, the second sealing ring 4 positioned at 3 periphery of the first sealing ring, 5 end face of the pump housing of the second sealing ring 4 and 2 bared end of bushing periphery
It is corresponding, it is equipped in the cavity 1 and stressed pressing device 6 is applied to the pump housing 5, pressing device 6 makes 2 bared end end face of bushing and the
One sealing ring 3 seals against, while 5 end face of the pump housing of 2 bared end of bushing periphery is abutted with the second sealing ring 4, and described first is close
Seal 3, the second sealing ring 4, cavity wall, the pump housing 5 and bushing 2 surround one jointly and closed fill helium space 26,5 axis of the pump housing
One end of the joint face of hole and bushing 2, which is located at, to be filled in helium space 26, and the other end, which is located at, to be filled in the cavity 1 other than helium space 26, the
A connection cavity 1 helium hole that is extraneous and filling helium space 26 is offered in cavity wall between one sealing ring 3 and the second sealing ring 4
7, helium hole 7 is connected to by helium tube 8 with helium feedway 9, offers a nitrogen in the cavity wall of 4 periphery of the second sealing ring
10, one, hole vacuumizes hole 11 and a detection hole 12, and the cavity 1 is by nitrogen pore 10 and is connected to nitrogen pore 10
On nitrogen tube 13 be connected to the nitrogen feedway 14 in the cavity external world, the cavity 1 is by vacuumizing hole 11 and being connected to
It vacuumizes the vacuum evacuation device 16 extraneous with cavity 1 of the vacuum-pumping tube 15 on hole 11 to be connected to, the cavity 1 also passes through detection hole 12
And the detection pipe 17 being connected in detection hole 12 is connected to the helium detection device 18 in 1 external world of cavity.
In the present embodiment, helium feedway 9 is a high pressure helium gas cylinder, and nitrogen feedway 14 is a high pressure nitrogen
Bottle, vacuum evacuation device 16 are a vacuum pump, and helium detection device 18 is existing Nitrogen Detector.
As shown in Fig. 2, the cavity 1 includes the bottom plate 101 being fixedly connected on bracket 22, is fixedly connected on bottom plate 101
Coaming plate 102 under the annular of upper surface, the top cover 103 for being removably sealedly connected on lower 102 upper end of coaming plate, 103 lower edge of top cover with
Along opposite on lower coaming plate 102, linear drive apparatus 19 is fixedly installed above the top cover 103, linear drive apparatus 19 is logical
It crosses support frame 23 and is fixedly connected on 103 top of top cover, linear drive apparatus 19 connect with top cover 103 and drives about 103 top cover
Movement uses hydraulic push rod as linear drive apparatus, the piston rod of hydraulic push rod to open or close cavity 1 in the present embodiment
Lower end is fixedly connected with top cover 103.
As shown in Fig. 2, being provided with jacking block 104 on 103 inner top surface of top cover, which is used as pressing device 6, for pushing up
The tight pump housing 5, on bottom plate 101, the nitrogen pore 10 vacuumizes the fixed interlocking of first sealing ring 3, the second sealing ring 4
Hole 11 and detection hole 12 are provided on lower coaming plate 102.
As shown in figure 3, since the lower end of bushing 2 stretches out in outside axis hole, a groove is provided on bottom plate 101
24, to ensure that 5 end face of the pump housing of 2 periphery of bushing 2 and bushing can be supported with the first sealing ring 3 and the sealing of the second sealing ring 4 simultaneously
It connects.
As shown in figure 3,5 end face of the pump housing in 2 periphery of bushing 2 and bushing is sealed with the first sealing ring 3 and second simultaneously
When circle 4 seals against, the first sealing ring 3, the second sealing ring 4 are partially exposed to outside bottom plate 101, when 2 bared end end face of bushing
And 5 end face of the pump housing of the periphery of bushing 2 is with the first sealing ring 3, the second sealing ring 4 when abutting respectively, the first sealing ring 3, second
There are gaps between 5 lower end surface of bottom plate 101 between sealing ring 4 and the pump housing, between 2 bared end end face of bushing, and it is empty that helium is filled in formation
Between 26, helium hole 7 is filled helium space 26 with this and is connected to, and can be filled in helium space 26 by helium feedway 9 to this and be filled with helium.
As shown in Fig. 2, two positioning columns 20 are provided on bottom plate 101 between the second sealing ring 4 and lower coaming plate 102,
Two location holes 501 of two positioning columns 20 and the pump housing 5 correspond, for positioning the pump housing 5, it is ensured that the first sealing ring 3 can
It is abutted with the end face of bushing 2.
The helium tube 8, vacuum-pumping tube 15, is respectively arranged with shut-off valve 21 in detection pipe 17 at nitrogen tube 13, can be according to need
Open or close shut-off valve 21.
Utility model works process is: as shown in FIG. 1 to 3, to 5 axis hole of the pump housing and the progress of bushing joint face
When air-leakage test, firstly, the pump housing 5 is installed on bottom plate 101, the corresponding set of two location holes 501 of the pump housing 5, which is connected to two, to be determined
On the column 20 of position, the position of the pump housing 5 is installed accurate, keeps the cyclic annular lower end surface of bushing 2 corresponding with the first sealing ring 3,2 periphery of bushing
The pump housing 5 end face it is corresponding with the second sealing ring 4, then start linear drive apparatus 19, linear drive apparatus 19 drive top cover
103 are moved downward to top cover 103 and the sealed connection of lower 102 upper end of coaming plate, as shown in Fig. 2, between top cover 103 and lower coaming plate 102
Setting third sealing ring makes inside cavity be isolated from the outside to realize sealing docking.
Then start vacuum evacuation device 16, vacuum evacuation device 16 detaches the air in cavity 1 in addition to filling helium space 26
Completely, while it will test the air in pipe 17 and nitrogen tube 13 and detach completely, then using nitrogen feedway 14 with a constant speed
To nitrogen charging is carried out in cavity 1, nitrogen is filled in the cavity 1 in addition to filling helium space 26 rate, while opening helium detection device 18,
Gas in cavity 1 in addition to filling helium space 26 is pumped into helium detection device 18 by helium detection device 18 with phase same rate
It is detected, after helium detection device 18 can't detect helium, is simultaneously stopped nitrogen feedway 14 and helium detection device
18, start helium feedway 9, fills helium space 26 to filling in helium space 26 fill helium and be greater than the air pressure for filling helium space 26
Then 1 air pressure inside of cavity in addition stops filling helium, waits after a certain period of time, be again started up helium detection device 18, to filling helium
1 internal gas of cavity other than space 26 is detected, if detecting the presence of helium, illustrate 5 axis hole of the pump housing and bushing 2 it
Between joint face there are gas leak phenomenon, otherwise side illustrates the joint face good seal between 5 axis hole of the pump housing and bushing 2.
When helium detection device 18 detects 1 internal gas of cavity filled other than helium space 26, can beat simultaneously
Nitrogen feedway 14 is opened, to increase 1 air pressure inside of cavity filled other than helium space 26, is easily taken out convenient for helium detection device 18
Get gas sample.
The shut-off valve 21 in nitrogen tube 13 is cut off while stopping nitrogen feedway 14, is stopping helium feedway
The shut-off valve 21 on helium tube 8, shut-off valve while stopping vacuum evacuation device 16 on cutting vacuum-pumping tube are cut off while 9
21, the shut-off valve 21 in detection pipe 17 is cut off while stopping helium detection device 18, so can ensure that no outside air returns
Stream enter cavity 1 in and cause testing result to be distorted, under normal circumstances nitrogen feedway 14, helium feedway 9, vacuumize
Device 16 and helium detection device 18 itself have non-return effect, and therefore, shut-off valve 21 is used as accessory, mention for detection accuracy
For ensureing.
The principles and effects of the invention, and the embodiment that part uses only is illustrated in above-described embodiment,
And is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from the invention structure
Under the premise of think of, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (4)
1. fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device, which is characterized in that can be opened and closed including one
Airtight cavity (1), the first sealing with the cooperation of bushing (2) bared end end face is provided in a planar inner wall of cavity (1)
The second sealing ring (4) for enclosing (3), being located at the first sealing ring (3) periphery, the second sealing ring (4) and bushing (2) bared end periphery
The pump housing (5) end face is corresponding, is equipped in the cavity (1) and applies stressed pressing device (6) to the pump housing (5), pressing device (6) makes
Bushing (2) bared end end face is sealed against with the first sealing ring (3), at the same the pump housing (5) end face of bushing (2) bared end periphery with
Second sealing ring (4) abuts, and first sealing ring (3), the second sealing ring (4), cavity wall, the pump housing (5) and bushing (2) are common
Surround one it is closed fill helium space (26), offered in the cavity wall between the first sealing ring (3) and the second sealing ring (4) several
A connection cavity (1) is extraneous and fills the helium hole (7) in helium space (26), and helium hole (7) are filled by helium tube (8) and helium supply
Set (9) connection, offer in the cavity wall of the second sealing ring (4) periphery several nitrogen pores (10), several vacuumize hole (11),
And a detection hole (12), the cavity (1) pass through nitrogen pore (10) and the nitrogen tube being connected on nitrogen pore (10)
(13) it is connected to the nitrogen feedway (14) in the cavity external world, the cavity (1) is by vacuumizing hole (11) and being connected to pumping
Vacuum-pumping tube (15) on vacuum hole (11) is connected to the vacuum evacuation device (16) in cavity (1) external world, and the cavity (1) also passes through
Detection hole (12) and the detection pipe (17) being connected on detection hole (12) and the helium detection device (18) in cavity (1) external world are even
It is logical.
2. fuel injection pump pump housing axis hole according to claim 1 and bushing joint face air-tightness detection device, feature
It is, the cavity (1) includes coaming plate (102) under bottom plate (101), the annular for being fixedly connected on bottom plate (101) upper surface, removable
Be sealedly connected on the top cover (103) of lower coaming plate (102) upper end with unloading, top cover (103) lower edge on lower coaming plate (102) along phase
It is right, it is fixedly installed linear drive apparatus (19) above the top cover (103), linear drive apparatus (19) and top cover (103) are even
It connects and top cover (103) is driven to move up and down to open or close cavity (1), be provided with jacking block on top cover (103) inner top surface
(104), for holding out against the pump housing (5), first sealing ring (3), the second sealing ring (4) are fixedly connected with the bottom of at jacking block (104)
On plate (101), the nitrogen pore (10) vacuumizes hole (11) and detection hole (12) is provided on lower coaming plate (102).
3. fuel injection pump pump housing axis hole according to claim 2 and bushing joint face air-tightness detection device, feature
It is, is provided with two positioning columns (20) on the bottom plate (101) between the second sealing ring (4) and lower coaming plate (102), two
Two location holes (501) of root positioning column (20) and the pump housing (5) correspond.
4. fuel injection pump pump housing axis hole according to claim 1 and bushing joint face air-tightness detection device, feature
It is, the helium tube (8), vacuum-pumping tube (15), is respectively arranged with shut-off valve (21) in detection pipe (17) at nitrogen tube (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725574.3U CN209673307U (en) | 2019-05-20 | 2019-05-20 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725574.3U CN209673307U (en) | 2019-05-20 | 2019-05-20 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209673307U true CN209673307U (en) | 2019-11-22 |
Family
ID=68575226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920725574.3U Withdrawn - After Issue CN209673307U (en) | 2019-05-20 | 2019-05-20 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209673307U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044551A (en) * | 2019-05-20 | 2019-07-23 | 无锡富泰盛精模科技有限公司 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
| GB2622498A (en) * | 2023-09-01 | 2024-03-20 | Sinomach Sensing Tech Co Ltd | Leak detection apparatus and method for weld of corrugated diaphragm of pressure sensor |
-
2019
- 2019-05-20 CN CN201920725574.3U patent/CN209673307U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044551A (en) * | 2019-05-20 | 2019-07-23 | 无锡富泰盛精模科技有限公司 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
| CN110044551B (en) * | 2019-05-20 | 2024-03-08 | 无锡富泰盛精模科技有限公司 | Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump |
| GB2622498A (en) * | 2023-09-01 | 2024-03-20 | Sinomach Sensing Tech Co Ltd | Leak detection apparatus and method for weld of corrugated diaphragm of pressure sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191122 Effective date of abandoning: 20240308 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191122 Effective date of abandoning: 20240308 |