CN203453676U - Central swivel joint for 22-tonner crawler excavator - Google Patents
Central swivel joint for 22-tonner crawler excavator Download PDFInfo
- Publication number
- CN203453676U CN203453676U CN201320439715.8U CN201320439715U CN203453676U CN 203453676 U CN203453676 U CN 203453676U CN 201320439715 U CN201320439715 U CN 201320439715U CN 203453676 U CN203453676 U CN 203453676U
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- CN
- China
- Prior art keywords
- crawler excavator
- turning axle
- annular
- tonner
- rotating shaft
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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 - Fee Related
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Abstract
The utility model relates to a central swivel joint for a 22-tonner crawler excavator. The central swivel joint for the 22-tonner crawler excavator comprises a rotating shaft and a rotating shell arranged on the rotating shaft in a sleeved mode. A plurality of axial oil grooves are formed in the rotating shaft, annular oil grooves communicated with the axial oil grooves are formed in the inner wall of the rotating shell, high-pressure rotation combined sealing rings are arranged on the two sides of each annular oil groove, an annular embedded groove is formed in the inner wall of the rotating shell, and a supporting ring in transition fit with the rotating shaft is arranged in the annular embedded groove. The central swivel joint for the 22-tonner crawler excavator has the advantages that low-pressure O-type sealing rings are added, oil leakage can be avoided effectively; the supporting ring is added, the coaxiality of the rotating shell and the rotating shaft can be ensured effectively, and thus the problem of oil leakage caused by unbalanced compression of the sealing rings is solved.
Description
Technical field
The utility model relates to a kind of 22 tonnes of crawler excavator center-rotary joints.
Background technique
Relative rotation motion is done with top body in crawler excavator chassis, and center-rotary joint is the supply of hydraulic circuit when guaranteeing to do rotation motion.In the time of digger revolving action, by central joint, hydraulic oil is flowed to running motor.Plain tubing is difficult to accomplish the effect as central joint.If but center-rotary joint seals the bad situation that fluid seepage will occur.There is radially unbalance loading in crawler excavator, cause center-rotary joint turning axle and revolving shell disalignment in real work, and wearing and tearing are increased, and the compression of product inner seal ring is unbalanced, thereby form fluid seepage.
Summary of the invention
For solving above technical deficiency, the utility model provides a kind of good sealing effect, and turning axle and revolving shell coaxality are high, prevents 22 tonnes of crawler excavator center-rotary joints of seepage.
The utility model is realized by following measures:
A kind of 22 tonnes of crawler excavator center-rotary joints of the present utility model, comprise turning axle
With the revolving shell being enclosed within on turning axle, in turning axle, be provided with some axial oil grooves, on described revolving shell inwall, be provided with some annular oil grooves that are communicated with axial oil groove, each annular oil groove both sides is provided with high-pressure rotational combined seal ring, on described revolving shell inwall, be provided with annular and embed groove, in described annular embedding groove, be provided with the support ring with turning axle transition fit.
Between above-mentioned turning axle top and revolving shell top, be provided with twice low pressure O RunddichtringO.
The compressibility of above-mentioned low pressure O RunddichtringO is 8% ~ 10%.
The beneficial effects of the utility model are:
1. increase low pressure O RunddichtringO, can effectively avoid fluid seepage.2. increase support ring, can effectively guarantee the coaxality of revolving shell and turning axle, thereby prevented the unbalanced fluid leakage problems causing of seal ring compression.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein: 1 turning axle, 2 revolving shells, 3 axial oil grooves, 4 support rings, 5 low pressure O RunddichtringOs, 6 annular oil grooves, 7 high-pressure rotational combined seal rings.
Embodiment
As shown in Figure 1, central authorities' revolution for a kind of 22 tonnes of crawler excavators of the present utility model
Joint, comprise turning axle 1 and be enclosed within the revolving shell 2 on turning axle 1, in turning axle 1, be provided with some axial oil grooves 3, on revolving shell inwall, be provided with some annular oil grooves 6 that are communicated with axial oil groove 3, each annular oil groove 6 both sides is provided with high-pressure rotational combined seal ring 7, and high-pressure rotational combined seal ring 7 can play and prevent that fluid from altering logical effect.Revolving shell lower end is provided with the end cap that covers turning axle end.Turning axle 1 upper end is provided with the shaft shoulder, and the shaft shoulder docks with the upper-end surface of revolving shell 2.
The utility model increases support ring 4, on revolving shell inwall, be provided with annular and embed groove, support ring 4 is arranged on annular and embeds in groove, support ring 4 and turning axle 1 transition fit, can effectively guarantee the coaxality of revolving shell 2 and turning axle 1, thereby prevent the unbalanced fluid leakage problems causing of seal ring compression.
In actual use, often there is the situation that inner fluid oozes out in the interface of the shaft shoulder and revolving shell 2.The utility model just increases and is provided with twice low pressure O RunddichtringO 5 between turning axle 1 top and revolving shell 2 tops.Can effectively avoid fluid seepage.The low pressure O RunddichtringO 5 that the compressibility that low pressure O RunddichtringO 5 adopts is 8% ~ 10%, can effectively prevent fluid seepage and extend O type circle working life through checking.
The above is only the preferred implementation of this patent; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the art of this patent principle; can also make some improvement and replacement, these improvement and replacement also should be considered as the protection domain of this patent.
Claims (3)
1. 22 tonnes of crawler excavator center-rotary joints, comprise turning axle and be enclosed within the revolving shell on turning axle, in turning axle, be provided with some axial oil grooves, on described revolving shell inwall, be provided with some annular oil grooves that are communicated with axial oil groove, each annular oil groove both sides is provided with high-pressure rotational combined seal ring, it is characterized in that: on described revolving shell inwall, be provided with annular and embed groove, in described annular embedding groove, be provided with the support ring with turning axle transition fit.
2. 22 tonnes of crawler excavator center-rotary joints according to claim 1, is characterized in that: between described turning axle top and revolving shell top, be provided with twice low pressure O RunddichtringO.
3. 22 tonnes of crawler excavator center-rotary joints according to claim 2, is characterized in that: the compressibility of described low pressure O RunddichtringO is 8% ~ 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439715.8U CN203453676U (en) | 2013-07-23 | 2013-07-23 | Central swivel joint for 22-tonner crawler excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439715.8U CN203453676U (en) | 2013-07-23 | 2013-07-23 | Central swivel joint for 22-tonner crawler excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453676U true CN203453676U (en) | 2014-02-26 |
Family
ID=50133552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320439715.8U Expired - Fee Related CN203453676U (en) | 2013-07-23 | 2013-07-23 | Central swivel joint for 22-tonner crawler excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453676U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114725A (en) * | 2015-09-14 | 2015-12-02 | 三一重型能源装备有限公司 | Hydraulic central rotary connector and wind power generation set |
| CN105221870A (en) * | 2015-09-14 | 2016-01-06 | 三一重型能源装备有限公司 | A kind of hydraulic central rotary joint and wind power generating set |
-
2013
- 2013-07-23 CN CN201320439715.8U patent/CN203453676U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114725A (en) * | 2015-09-14 | 2015-12-02 | 三一重型能源装备有限公司 | Hydraulic central rotary connector and wind power generation set |
| CN105221870A (en) * | 2015-09-14 | 2016-01-06 | 三一重型能源装备有限公司 | A kind of hydraulic central rotary joint and wind power generating set |
| CN105221870B (en) * | 2015-09-14 | 2017-11-10 | 三一重型能源装备有限公司 | A kind of hydraulic central rotary joint and wind power generating set |
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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: 20140226 Termination date: 20190723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |