CN206352576U - High-pressure gear pump movable sealing structure - Google Patents
High-pressure gear pump movable sealing structure Download PDFInfo
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- CN206352576U CN206352576U CN201621473089.4U CN201621473089U CN206352576U CN 206352576 U CN206352576 U CN 206352576U CN 201621473089 U CN201621473089 U CN 201621473089U CN 206352576 U CN206352576 U CN 206352576U
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- pump
- shaft
- gear
- protecgulum
- sealing
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Abstract
The utility model belongs to packing mechanical equipment technical field, it is related to a kind of high-pressure gear pump movable sealing structure, including the rear pump housing, protecgulum, it is connected between the rear pump housing and protecgulum by middle pump body, splined shaft is by bearing rotating support on protecgulum, and gear shaft is rotated and is arranged in gear pump inner chamber, and the side end of gear shaft one is fastenedly connected with splined shaft, oil sealing is pressed with the oil seal groove of protecgulum, the inner ring of the oil sealing and the outer circumference surface of splined shaft constitute dynamic sealing.The utility model product structure is simple, rationally ingenious, and not enough for existing product carries out specific aim improvement, can effectively solve Leakage caused by the failure of high-pressure gear pump dynamic sealing.
Description
Technical field
The utility model belongs to packing mechanical equipment technical field, is related to a kind of high-pressure gear pump movable sealing structure.
Background technology
In Modern hydraulic transmission, hydraulic gear pump is vertically together in series two or more gear pumps, by one
Root drive shaft drives, a kind of device that the discharge capacity of each pump can be combined.Multi-joint hydraulic gear pump reference scope is very wide, such as builds
Engineering machinery, handling machinery etc., rated pressure needs to reach 23MPa under such operating mode, and actual use pressure is even
More than 25MPa.Because gear pump oil-out pressure is high, pump housing oil inlet and outlet pressure difference is big, causes axial seal difficult, illustrates
It is as follows:
The multi-joint high hydraulic gear pump used at present generally employs the outer of dynamic sealing mode as shown in Figure 1, i.e. oil sealing 3
Static seal is formed between oil seal groove on circle and protecgulum 13, forms dynamic between the inner ring lip and front pump driving gear axle 4 of oil sealing 3
Sealing, so that sealing function is realized, such structure front pump driving tooth when gear pump oil inlet and outlet has larger pressure differential
Wheel shaft 4 can be by very big radial load, so that the bounce of front pump driving gear axle 4 bears the limit more than oil sealing 3, finally
Cause the leakage of fluid.
The content of the invention
The utility model is in view of the above-mentioned problems, provide a kind of high-pressure gear pump movable sealing structure, and the sealing structure can be effective
Avoid due to driving shaft bounce caused by dynamic sealing failure.
According to the technical solution of the utility model：A kind of high-pressure gear pump movable sealing structure, including the rear pump housing, protecgulum, institute
State and be connected between the rear pump housing and protecgulum by middle pump body, splined shaft is by bearing rotating support on protecgulum, and gear shaft is rotated
It is arranged in gear pump inner chamber, the side end of gear shaft one is fastenedly connected with splined shaft, it is characterised in that：Pressed in the oil seal groove of protecgulum
Equipped with oil sealing, the inner ring of the oil sealing and the outer circumference surface of splined shaft constitute dynamic sealing.
As further improvement of the utility model, the bearing is by the shaft shoulder projection on splined shaft and is arranged at spline
Pad in the neck of axle is fixed, and the raised outer end of the shaft shoulder is corresponded on splined shaft and is integrally formed extension, oil sealing
The surface of inner ring and extension forms dynamic sealing.
As further improvement of the utility model, the gear shaft includes rear pump driven gear axle, middle pump driving gear
Axle, front pump driving gear axle, the rear pump driven gear axle, middle pump driving gear shaft, front pump driving gear axle three pass through even
Spindle is connected.
As further improvement of the utility model, the middle pump body has two, and two middle pump bodies are tightly connected rear two ends
It is tightly connected respectively with the rear pump housing, protecgulum.
As further improvement of the utility model, the rear pump housing is bolted connection with neighbouring middle pump body.
It is of the present utility model to have technical effect that：The utility model product structure is simple, rationally ingenious, for existing product
It is not enough carry out specific aim improvement, can effectively solve Leakage caused by the failure of high-pressure gear pump dynamic sealing.
Brief description of the drawings
Fig. 1 is the structural representation of existing high-pressure gear pump dynamic sealing.
Fig. 2 is structural representation of the present utility model.
Embodiment
Embodiment of the present utility model is further described below in conjunction with the accompanying drawings.
In Fig. 2, including splined shaft 1, bearing 2, oil sealing 3, front pump driving gear axle 4, connecting shaft 5, middle pump driving gear shaft
6th, rear pump driven gear axle 7, bolt 8, the rear pump housing 9, rear pump driving gear axle 10, middle pump body 11, driven gear shaft 12, protecgulum 13
Deng.
As shown in Fig. 2 the utility model is a kind of high-pressure gear pump movable sealing structure, including the rear pump housing 9, protecgulum 13, institute
State and be connected between the rear pump housing 9 and protecgulum 13 by middle pump body 11, splined shaft 1 by the rotating support of bearing 2 on protecgulum 13, tooth
Wheel shaft is rotated and is arranged in gear pump inner chamber, and the side end of gear shaft one is fastenedly connected with splined shaft 1, is pressed in the oil seal groove of protecgulum 13
Equipped with oil sealing 3, the inner ring of the oil sealing 3 constitutes dynamic sealing with the outer circumference surface of splined shaft 1.
Bearing 2 is carried out spacing solid by the pad that is raised and being arranged in the neck of splined shaft 1 of the shaft shoulder on splined shaft 1
Fixed, corresponding to the integrally formed extension in the raised outer end of the shaft shoulder on splined shaft 1, the surface of the inner ring of oil sealing 3 and extension forms dynamic
Sealing.
Gear shaft includes rear pump driven gear axle 7, middle pump driving gear shaft 6, front pump driving gear axle 4, the rear pump master
Movable gear shaft 7, middle pump driving gear shaft 6, the three of front pump driving gear axle 4 are connected by connecting shaft 5.
Middle pump body 11 has two, and two middle pump bodies 11 are tightly connected rear two ends and connected respectively with the rear pump housing 9, the sealing of protecgulum 13
Connect.
The pump housing 9 is fastenedly connected with neighbouring middle pump body 11 by bolt 8 afterwards.
The utility model product can effectively solve Leakage caused by the failure of high-pressure gear pump dynamic sealing.
Claims (5)
1. a kind of high-pressure gear pump movable sealing structure, including the rear pump housing（9）, protecgulum（13）, the rear pump housing（9）With protecgulum（13）
Between pass through middle pump body（11）It is connected, splined shaft（1）Pass through bearing（2）Rotating support is in protecgulum（13）On, gear shaft is rotated
It is arranged in gear pump inner chamber, the side end of gear shaft one and splined shaft（1）It is fastenedly connected, it is characterised in that：Protecgulum（13）Oil
Oil sealing is pressed with sealing groove（3）, the oil sealing（3）Inner ring and splined shaft（1）Outer circumference surface constitute dynamic sealing.
2. high-pressure gear pump movable sealing structure as claimed in claim 1, it is characterised in that：The bearing（2）Pass through splined shaft
（1）On the shaft shoulder it is raised and be arranged at splined shaft（1）Neck in pad fix, splined shaft（1）On correspond to
The raised outer end of the shaft shoulder is integrally formed extension, oil sealing（3）The surface of inner ring and extension forms dynamic sealing.
3. high-pressure gear pump movable sealing structure as claimed in claim 1, it is characterised in that：The gear shaft includes rear pump actively
Gear shaft（7）, middle pump driving gear shaft（6）, front pump driving gear axle（4）, the rear pump driven gear axle（7）, middle pump actively
Gear shaft（6）, front pump driving gear axle（4）Three passes through connecting shaft（5）It is connected.
4. high-pressure gear pump movable sealing structure as claimed in claim 1, it is characterised in that：The middle pump body（11）There are two,
Two middle pump bodies（11）Be tightly connected rear two ends respectively with the rear pump housing（9）, protecgulum（13）It is tightly connected.
5. high-pressure gear pump movable sealing structure as claimed in claim 1, it is characterised in that：The rear pump housing（9）With it is neighbouring
Middle pump body（11）Pass through bolt（8）It is fastenedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473089.4U CN206352576U (en) | 2016-12-29 | 2016-12-29 | High-pressure gear pump movable sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473089.4U CN206352576U (en) | 2016-12-29 | 2016-12-29 | High-pressure gear pump movable sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206352576U true CN206352576U (en) | 2017-07-25 |
Family
ID=59348733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621473089.4U Active CN206352576U (en) | 2016-12-29 | 2016-12-29 | High-pressure gear pump movable sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206352576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420299A (en) * | 2017-09-07 | 2017-12-01 | 合肥长源液压股份有限公司 | A kind of multi-joint heavy-duty gear pump of lightweight structure design |
-
2016
- 2016-12-29 CN CN201621473089.4U patent/CN206352576U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420299A (en) * | 2017-09-07 | 2017-12-01 | 合肥长源液压股份有限公司 | A kind of multi-joint heavy-duty gear pump of lightweight structure design |
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