CN202228337U - Empty absorbing preventing device for plunger pump - Google Patents
Empty absorbing preventing device for plunger pump Download PDFInfo
- Publication number
- CN202228337U CN202228337U CN2011203512198U CN201120351219U CN202228337U CN 202228337 U CN202228337 U CN 202228337U CN 2011203512198 U CN2011203512198 U CN 2011203512198U CN 201120351219 U CN201120351219 U CN 201120351219U CN 202228337 U CN202228337 U CN 202228337U
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- China
- Prior art keywords
- passage
- empty
- suction
- plunger pump
- bonnet
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- Reciprocating Pumps (AREA)
Abstract
The utility model discloses an empty absorbing preventing device for a plunger pump, which includes a casing (2) and a rear cover (5), wherein a casing cavity (7) is arranged in the casing (2); an oil absorption passage (8) communicated with the casing cavity (7) is arranged on the rear cover (5); an empty absorbing preventing passage (6) is also arranged on the rear cover (5); one end of the empty absorbing preventing passage (6) is communicated with the oil absorption passage (8), and the other end of the empty absorbing preventing passage (6) is communicated with the casing cavity (7); and a one-way valve device (4) is arranged in the empty absorbing preventing passage (6). In the utility model, the one-way communication is adopted between the casing cavity of the plunger pump and the oil absorption passage of the rear cover, so that hydraulic oil in the casing cavity enters the oil absorption passage for oil supplement after negative pressure is generated in the oil absorption passage, and the phenomenon that all oil in the oil absorption passage of the plunger pump is absorbed is avoided; meanwhile, the cavitation erosion is avoided, the service life is greatly prolonged, and the maintenance cost is reduced.
Description
Technical field
The utility model relates to a kind of anti-empty device, particularly a kind of empty device of anti-suction that is used for hydraulic planger pump inhaled.
Background technique
Hydraulic planger pump generally comprises housing, connects the bonnet of housing, and the swivel assembly of mounting strap thrust plate has the suction passage that is connected with the housing chamber in the housing chamber of housing on the bonnet.Hydraulic planger pump suction passage in the course of the work can't the moment negative pressure can occur with avoiding; Negative pressure frequently occurs and can make part contact surfaces such as pump port plate and cylinder body loose and peel off, i.e. cavitation phenomenon, this just requires suction passage is carried out supercharging; But can't realize at present a lot of main frames the fuel tank that connects suction passage is sealed supercharging; Make hydraulic planger pump cavitation erosion in use can occur, thereby the working life of having reduced hydraulic planger pump, maintenance cost improved simultaneously.
Summary of the invention
The purpose of the utility model is, provides the anti-suction of a kind of plunger pump empty device.The utility model can prevent empty, the cavitation erosion of suction passage suction, improves working life, reduces maintenance cost.
The technological scheme of the utility model: the empty device of the anti-suction of a kind of plunger pump; Comprise housing and bonnet; Be provided with the housing chamber in the housing, bonnet is provided with the suction passage that is communicated with the housing chamber, also is provided with the anti-empty passage of inhaling on the described bonnet; Anti-empty passage one end connection suction passage, the other end connection housing chamber of inhaling; The anti-suction in the empty passage is provided with check valve apparatus.
Aforesaid plunger pump is anti-to be inhaled in the empty device, and described check valve apparatus comprises guide finger and the spool that is fixed in the empty passage of anti-suction, is with the spring that is connected with spool on the guide finger.
Aforesaid plunger pump is anti-to be inhaled in the empty device, and described spool top is provided with limiting stopper through check ring.
Aforesaid plunger pump is anti-to be inhaled in the empty device, and described limiting stopper is that interference fit is connected with the empty passage of anti-suction of bonnet.
According to the anti-anti-suction short side method of inhaling empty device of aforesaid plunger pump; Between the suction passage of the housing chamber of plunger pump and bonnet, pass through unilaterally connected; The hydraulic oil entering suction passage that makes suction passage occur in the negative pressure rear case chamber is carried out repairing, prevents that the suction passage of plunger pump from being inhaled sky.
Aforesaid plunger pump is anti-to be inhaled in the short side method; The hydraulic oil that said suction passage occurs in the negative pressure rear case chamber gets into the method that suction passage is carried out repairing; Be the required hydraulic oil of suction passage during greater than the inlet port fuel feeding, the endoceliac hydraulic oil of shell gets into suction passage and carries out repairing.
Compare with existing technology; The utility model adopts unilaterally connected between the suction passage of the housing chamber of plunger pump and bonnet; The hydraulic oil entering suction passage that makes suction passage occur in the negative pressure rear case chamber is carried out repairing, prevents that the suction passage of plunger pump from being inhaled sky, has avoided cavitation phenomenon simultaneously; Increase the service life significantly, reduce maintenance cost.The utility model has also improved the level of integration of device, effectively reduces installing space, and is easy to use, and uses assembly less, implements relatively simple for structurely, reduced cost of production.In addition, the spool of check valve apparatus is directed through guide finger, and spring provides impacting force, makes to contact fully between spool and the limiting stopper and obturage good seal performance.
The utility model is through testing: the utility model is compared with conventional pumps, and the fault repair rate reduces by 90% under the operating modes such as coal machine, increases by 115% average life.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of check valve apparatus.
Being labeled as in the accompanying drawing: 1-swivel assembly, 2-housing, 3-thrust plate, 4-check valve apparatus, 4a-circlip, 4b-limiting stopper, 4c-spool, 4d-guide finger, 4e-spring, 5-bonnet, anti-empty passage, 7-housing chamber, the 8-suction passage of inhaling of 6-.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described, but not as the foundation to the utility model restriction.
Embodiment.A kind of plunger pump is anti-inhales empty device, constitutes as illustrated in fig. 1 and 2ly, comprises housing 2 and bonnet 5; Be provided with housing chamber 7 in the housing 2; Bonnet 5 is provided with the suction passage 8 that is communicated with housing chamber 7, is provided with the swivel assembly 1 of band thrust plate 3 in the described housing chamber 7, also is provided with the anti-empty passage 6 of inhaling on the described bonnet 5; Anti-empty passage 6 one ends connection suction passage 8, the other end connection housing chamber 7 of inhaling; The anti-suction in the empty passage 6 is provided with check valve apparatus 4.
Described check valve apparatus 4 comprises guide finger 4d and the spool 4c that is fixed in the empty passage 6 of anti-suction, is with the spring 4e that is connected with spool 4c on the guide finger 4d; Described spool 4c top is provided with limiting stopper 4b through check ring 4a, strengthens the sealing of spool.
Described limiting stopper 4d is that interference fit is connected with the empty passage 6 of the anti-suction of bonnet 5.
The oil inlet end of described suction passage 8 is inlet port S.
When the utility model was to use: the plunger pump pump was full of hydraulic oil in the housing 2 when work, and the internal drainage that the pump running produces flows back to fuel tank through oil pipe, plays thermolysis.Open the empty passage 6 of anti-suction on the bonnet 5 housing chamber 7 and pump inlet port S are connected, the middle check valve apparatus that increases, it is logical, oppositely obstructed to make housing chamber 7 arrive suction passage 8 directions.Fig. 2 is a check valve apparatus, and spool 4c is directed through guide finger 4d, and 4e provides impacting force by spring; Make and contact fully between spool 4c and the limiting stopper 4b and obturage; Inlet port S to the housing chamber the obstructed oil of 7 directions, limiting stopper 4b and bonnet 5 are interference fit, and with circlip 4a screens.Spool 4c does not open when the pump proper functioning, and hydraulic oil normal flow oil sump tank is with heat radiation, when negative pressure appears in inlet port S place in the housing chamber 7; Spool 4c opens, and oil subsidy in housing 2 chambeies is gone into inlet port S, avoids pump inlet port S to occur inhaling empty; After inlet port S negative pressure disappeared, spool 4c closed.
The utility model adopts unilaterally connected between the suction passage of the housing chamber of plunger pump and bonnet; The hydraulic oil entering suction passage that makes suction passage occur in the negative pressure rear case chamber is carried out repairing; The suction passage that prevents plunger pump is inhaled sky; Avoid cavitation phenomenon simultaneously, increased the service life significantly, reduced maintenance cost.The utility model has also improved the level of integration of device, effectively reduces installing space, and is easy to use, and uses assembly less, implements relatively simple for structurely, reduced cost of production.In addition, the spool of check valve apparatus is directed through guide finger, and spring provides impacting force, makes to contact fully between spool and the limiting stopper and obturage good seal performance.
Claims (4)
1. a plunger pump prevents inhaling empty device; Comprise housing (2) and bonnet (5); Be provided with housing chamber (7) in the housing (2), bonnet (5) is provided with the suction passage (8) that is communicated with housing chamber (7), it is characterized in that: also be provided with the anti-empty passage (6) of inhaling on the described bonnet (5); Anti-empty passage (6) one ends connection suction passage (8), the other end connection housing chamber (7) of inhaling; The anti-suction in the empty passage (6) is provided with check valve apparatus (4).
2. the empty device of the anti-suction of plunger pump according to claim 1, it is characterized in that: described check valve apparatus (4) comprises guide finger (4d) and the spool (4c) that is fixed in the anti-empty passage of suction (6), is with the spring (4e) that is connected with spool (4c) on the guide finger (4d).
3. the empty device of the anti-suction of plunger pump according to claim 2, it is characterized in that: described spool (4c) top is provided with limiting stopper (4b) through check ring (4a).
4. the empty device of the anti-suction of plunger pump according to claim 3, it is characterized in that: described limiting stopper (4d) is that interference fit is connected with the empty passage of anti-suction (6) of bonnet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203512198U CN202228337U (en) | 2011-09-19 | 2011-09-19 | Empty absorbing preventing device for plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203512198U CN202228337U (en) | 2011-09-19 | 2011-09-19 | Empty absorbing preventing device for plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228337U true CN202228337U (en) | 2012-05-23 |
Family
ID=46078924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203512198U Expired - Lifetime CN202228337U (en) | 2011-09-19 | 2011-09-19 | Empty absorbing preventing device for plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271050A (en) * | 2015-11-25 | 2016-01-27 | 上海电气液压气动有限公司 | Oil cylinder hydraulic driving system with air suction prevention function |
-
2011
- 2011-09-19 CN CN2011203512198U patent/CN202228337U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271050A (en) * | 2015-11-25 | 2016-01-27 | 上海电气液压气动有限公司 | Oil cylinder hydraulic driving system with air suction prevention function |
| CN105271050B (en) * | 2015-11-25 | 2018-01-02 | 上海电气液压气动有限公司 | It is a kind of that there is the anti-oil cylinder hydraulic drive system for being emptied function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liyuan Hydraulic (Suzhou) Co., Ltd. Assignor: Liyuan Hydraulic Co., Ltd. of Aviation Industry Corporation of China Contract record no.: 2014520000018 Denomination of utility model: Empty absorbing preventing device for plunger pump Granted publication date: 20120523 License type: Exclusive License Record date: 20141112 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |