CN202851904U - Pressure balancing device and underground construction equipment - Google Patents
Pressure balancing device and underground construction equipment Download PDFInfo
- Publication number
- CN202851904U CN202851904U CN 201220536149 CN201220536149U CN202851904U CN 202851904 U CN202851904 U CN 202851904U CN 201220536149 CN201220536149 CN 201220536149 CN 201220536149 U CN201220536149 U CN 201220536149U CN 202851904 U CN202851904 U CN 202851904U
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- Prior art keywords
- pressure
- described pressure
- setting unit
- equaliser
- delivery outlet
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- 238000010276 construction Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims description 43
- 239000002828 fuel tank Substances 0.000 claims description 9
- 239000010985 leather Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000008602 contraction Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 10
- 239000000314 lubricant Substances 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
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Abstract
The utility model provides a pressure balance device and underground construction equipment. Pressure balance device includes pressure output port, and pressure balance device still includes: a pressure source; a pressure acquisition element; and an input port of the pressure setting unit is connected with an output port of the pressure source, an output port of the pressure setting unit is connected with a pressure output port, and a control port of the pressure setting unit is connected with an output port of the pressure acquisition element. The pressure balancing device adopts oil in the pressure acquisition element to control the output pressure of the pressure setting unit, thereby indirectly controlling the pressure of the oil injected into the transmission device. Therefore, the cavity of the pressure acquisition element is not directly communicated with the internal sealed cavity of the transmission device, so that the expansion and contraction, leakage and the like of oil of the transmission device do not need to be absorbed or compensated by the aid of the cavity of the pressure acquisition element.
Description
Technical field
The utility model relates to field of sealing technology, more specifically, relates to a kind of pressure equaliser and underground construction equipment.
Background technique
The equipment of some underground construction equipment need to be worked in mud, and the transmission device in it comprises gear or bearing part, therefore needs the turbidity test in the assurance transmission device, to guarantee the reliable sealing of lubricant oil.Yet the pressure that the mud of certain depth produces has exceeded the bearing capacity of Sealing of the prior art to the requirement of the sealing (for example rotary seal) of transmission device.For realizing the reliable sealing of transmission device, carrying out balance to the inside and outside pressure reduction of transmission device, so that pressure reduction is controlled in the carrying scope of Sealing of the prior art.
Usually adopt pressure equaliser that the inside and outside differential pressure of transmission device is carried out balance in the prior art.For example, pressure equaliser of the prior art can adopt leather bag, piston equal pressure transmitting element usually, the pressure of formation of sludge is delivered in the transmission device, thereby realizes the purpose of balance pressure reduction.
Fig. 1 shows the structural representation of pressure equaliser of the prior art.As shown in Figure 1, pressure equaliser of the prior art comprises such as leather bag, piston etc. of pressure acquisition element 30() and housing 80.Transmission device 70 comprises movement parts 74 and the solid of rotation 75 such as transmission device fixed block 72, Sealing 73, bearing or driving gear.The right side of Sealing 73 (i.e. the outside) is subject to the pressure from mud, and the left side of Sealing 73 (namely inboard) forms inner sealing chamber 71.Inner sealing chamber 71 is connected with the delivery outlet of pressure acquisition element 30.
When equipment need to be worked in mud, equipment and pressure equaliser entered in the mud simultaneously.Inside and outside both sides at the Sealing 73 of transmission device are respectively the pressure P of pressure and the mud of lubricating oil.Along with the increase of the degree of depth, the pressure P that mud produces also increases gradually.The pressure P that mud produces acts directly on the outside of Sealing 73, also acts on simultaneously the outside of pressure acquisition element 30, and by pressure acquisition element 30 pressure P of mud is passed to lubricating oil in the housing 80.So the lubricating oil in the housing 80 is delivered to pressure P the inboard of Sealing 73 through pipeline and corresponding passage.Like this, the pressure of Sealing 73 inside and outside both sides is near balance, and Sealing 73 will be worked under the external and internal pressure near balance all the time, thereby has improved sealed environment, has guaranteed the turbidity test in the transmission device, has guaranteed the reliable sealing of lubricant oil.
Yet, because the pressure P that pressure equaliser adopts leather bag, piston equal pressure acquisition elements that mud is produced is delivered in the transmission device cavity volume 31 of its pressure acquisition element 30 and inner sealing chamber 71(such as the lubricant reservoir of transmission device) directly be communicated with.Because power, volume, the rotary seal size of the transmission device of underground construction equipment are larger, the heating value of transmission device when high load is worked is large, and the volumetric expansion of fluid is larger, causes the cavity volume 31 of pressure acquisition element also larger.In addition, because the problem that transmission device leaks also need regular cavity volume 31 interior additional certain lubricant oil to the pressure acquisition element, thereby the maintenance requirement of equipment is higher.That is to say, the volume of transmission device inner fluid of the prior art can because of expand with heat and contract with cold, the reason such as leakage changes, need to absorb by means of the cavity volume 31 of pressure acquisition element 30 or compensate at this moment.
The model utility content
The utility model aims to provide a kind of pressure equaliser and underground construction equipment, with solve in the prior art owing to the volume of transmission device inner fluid can because of expand with heat and contract with cold, the reason such as leakage changes, the problem that need to absorb or compensate by means of the pressure acquisition element.
For solving the problems of the technologies described above, according to first aspect of the present utility model, provide a kind of pressure equaliser, comprise pressure output, pressure equaliser also comprises: pressure source; The pressure acquisition element; The pressure setting unit, the inlet opening of pressure setting unit is connected with the delivery outlet of pressure source, and the delivery outlet of pressure setting unit is connected with pressure output, and the control mouth of pressure setting unit is connected with the delivery outlet of pressure acquisition element.
Further, the pressure setting unit is the pressure setting valve, the pressure setting valve comprises inlet opening, delivery outlet and control mouth, the inlet opening of pressure setting valve, delivery outlet and control mouth namely are respectively inlet opening, delivery outlet and the control mouth of pressure setting unit, and the pressure of the control mouth of the pressure of the delivery outlet of pressure setting valve and pressure setting valve is the equal difference relation.
Further, the pressure setting unit comprises reduction valve and relief valve; The inlet opening of reduction valve is connected with the delivery outlet of pressure source as the inlet opening of pressure setting unit, the delivery outlet of reduction valve is connected with pressure output as the delivery outlet of pressure setting unit, and the control mouth of reduction valve is connected with the delivery outlet of pressure acquisition element as the control mouth of pressure setting unit; The inlet opening of relief valve is connected with pressure output, and the delivery outlet of relief valve is connected with fuel tank, and the control mouth of relief valve is connected with the control mouth of reduction valve.
Further, pressure equaliser also comprises the bypass Protective valve that is connected between pressure source delivery outlet and the fuel tank.
Further, the pressure acquisition element is leather bag or piston.
Further, pressure source is oil pump.
According to second aspect of the present utility model, a kind of underground construction equipment is provided, has comprised transmission device and pressure equaliser, transmission device comprises the inner sealing chamber, this pressure equaliser is above-mentioned pressure equaliser, and the inner sealing chamber is connected with the pressure output of pressure equaliser.
Further, the pressure acquisition element of transmission device and pressure equaliser is arranged in mud, and the pressure source of pressure equaliser is installed on the ground.
Pressure equaliser adopts the delivery pressure of the fluid pilot pressure setup unit in the pressure acquisition element, thereby has indirectly controlled the oil liquid pressure that injects transmission device.Like this, the cavity volume of pressure acquisition element directly is not communicated with the inner sealing chamber of transmission device, and therefore, the expanding with heat and contract with cold of the fluid of transmission device, leakage etc. all need to not absorb by the cavity volume of pressure acquisition element or compensation.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the structural representation of pressure equaliser of the prior art and transmission device;
Fig. 2 has schematically shown pressure equaliser among the utility model the first embodiment and the structural representation of transmission device;
Fig. 3 has schematically shown pressure setting valve among Fig. 2 and the annexation figure of fuel tank; And
Fig. 4 has schematically shown pressure equaliser among the utility model the second embodiment and the structural representation of transmission device.
Reference character among the figure: 10, pressure output; 20, pressure source; 30, pressure acquisition element; 31, cavity volume; 40, pressure setting unit; 41, pressure setting valve; 41a, inlet opening; 41b, delivery outlet; 41c, control mouth; 41d, return opening; 42, reduction valve; 43, relief valve; 50, fuel tank; 60, bypass Protective valve; 70, transmission device; 71, inner sealing chamber; 72, transmission device fixed block; 73, Sealing; 74, movement parts; 75, solid of rotation; 80, housing; P, pressure.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As first aspect of the present utility model, provide a kind of pressure equaliser.Shown in Fig. 2 to 4, pressure equaliser comprises pressure output 10, and pressure equaliser also comprises: pressure source 20; Pressure acquisition element 30; Pressure setting unit 40, the inlet opening of pressure setting unit 40 is connected with the delivery outlet of pressure source 20, and the delivery outlet of pressure setting unit 40 is connected with pressure output 10, and the control mouth of pressure setting unit 40 is connected with the delivery outlet of pressure acquisition element 30.Preferably, pressure acquisition element 30 is leather bag or piston, also can be the pressure detecting element (such as pressure transducer etc.) that the pressure P of mud can be converted into electrical signal.Preferably, pressure source 20 is oil pumps.Preferably, pressure equaliser also comprises for the bypass Protective valve 60 that the output of pressure source 20 is protected, thereby prevents the overpressure that pressure source 20 is exported.Preferably, bypass Protective valve 60 is relief valves.
Preferably, the pilot pressure of the delivery pressure of pressure setting unit 40 and its control mouth can concern for equal difference, and wherein, difference is less, and the pressure P of its delivery pressure and mud is more approaching, ideally, can accomplish to equate fully.
Please refer to Fig. 2 and Fig. 4, pressure acquisition element 30 can gather the pressure P of mud, for example, in one embodiment, can be directly according to its pilot pressure of mud pressure output that detects, this pilot pressure is delivered to the control mouth of pressure setting unit 40 by hydraulic pipe line, thereby the delivery pressure of pilot pressure setup unit 40, reflect by pressure output 10 with the pressure P with mud, parts for ready to balance such as transmission devices, thereby the Sealing that makes transmission device always works under the pressure near balance, has guaranteed turbidity test in the transmission device and the reliable sealing of lubricant oil.In another not shown embodiment, the mud pressure signal that can adopt pressure detecting element to export comes the delivery pressure of pilot pressure setup unit 40.
In the working procedure of pressure equaliser, pressure equaliser adopts the delivery pressure of the fluid pilot pressure setup unit 40 in the pressure acquisition element 30, thereby has indirectly controlled the oil liquid pressure that injects transmission device.The cavity volume 31 of pressure acquisition element 30 directly is not communicated with the inner sealing chamber 71 of transmission device, therefore, the expanding with heat and contract with cold of the fluid of transmission device, leakage etc. all need to not absorb or compensation by the cavity volume 31 of pressure acquisition element 30, so cavity volume 31 can be less.
In addition, the pressure oil of exporting owing to pressure source 20 flows in the inner sealing chamber 71 of transmission device 70 through pressure setting unit 40, thereby it is replenished in real time, therefore, the volume of fuel tank 50 can be designed much larger than the leakage rate at the Sealing place of transmission device, with the sufficient supplies of assurance fluid, thereby greatly prolonged maintenance period.
In the embodiment shown in Figure 2, preferably, pressure setting unit 40 is pressure setting valves 41, pressure setting valve 41 comprises inlet opening, delivery outlet and control mouth, the inlet opening of pressure setting valve 41, delivery outlet and control mouth namely are respectively inlet opening, delivery outlet and the control mouth of pressure setting unit 40, and the pressure of the control mouth of the pressure of the delivery outlet of pressure setting valve 41 and pressure setting valve 41 is the equal difference relation.
Please refer to Fig. 3, pressure setting unit 40 comprises inlet opening 41a, delivery outlet 41b, control mouthful 41c and return opening 41d.Especially, pressure setting unit 40 is the external control valve, and it possesses the function of decompression and pressure release simultaneously.Like this, its return opening 41d can be connected with fuel tank 50, when the fluid expanded by heating in the transmission device, can be discharged by return opening 41d.Further, the pressure of this release also can be controlled by the pressure of control mouthful 41c.
In the embodiment shown in fig. 4, preferably, pressure setting unit 40 comprises reduction valve 42 and relief valve 43.Wherein, the inlet opening of reduction valve 42 is connected with the delivery outlet of pressure source 20 as the inlet opening of this pressure setting unit 40, the delivery outlet of reduction valve 42 is connected with pressure output 10 as the delivery outlet of pressure setting unit 40, and the control mouth of reduction valve 42 is connected with the delivery outlet of pressure acquisition element 30 as the control mouth of this pressure setting unit 40.The inlet opening of relief valve 43 is connected with pressure output 10, and the delivery outlet of relief valve 43 is connected with fuel tank 50, and the control mouth of relief valve 43 is connected with the control mouth of reduction valve 42.Like this, can limit by pressure source 20 by reduction valve 42 and flow into the pressure in the inner sealing chamber 71 of transmission device 70, and control by the draining pressure of 43 pairs of transmission devices of relief valve simultaneously.When the fluid expanded by heating in the transmission device, can be discharged by relief valve 43.Further, the pressure of this release also can be controlled by the pressure to the control mouth of relief valve 43.
As second aspect of the present utility model, a kind of underground construction equipment is provided, comprise transmission device 70 and pressure equaliser, transmission device 70 comprises inner sealing chamber 71, wherein, this pressure equaliser is the pressure equaliser in the various embodiments described above, and inner sealing chamber 71 is connected with the pressure output 10 of pressure equaliser.Preferably, the pressure acquisition element 30 of transmission device 70 and pressure equaliser is arranged in mud.Preferably, the pressure source 20 of pressure equaliser is installed on the ground.
Preferably, transmission device 70 for example comprises transmission device fixed block 72, Sealing 73, movement parts 74(, bearing or driving gear etc.) and solid of rotation 75.The right side of Sealing 73 is subject to the pressure from mud, and the left side of Sealing 73 forms inner sealing chamber 71.
When the equipment of underground construction equipment need to be worked in mud, equipment (the particularly transmission device on it 70) entered in the mud simultaneously with pressure equaliser.Inside and outside both sides at the Sealing 73 of transmission device 70 are respectively the pressure P of pressure and the mud of lubricating oil.Along with the increase of the degree of depth, the pressure P that mud produces also increases gradually.The pressure P that mud produces acts directly on the outside of Sealing 73, also acts on simultaneously the outside of pressure acquisition element 30, and by pressure acquisition element 30 pressure P of mud is passed to lubricating oil in the housing 80.So the lubricating oil in the housing 80 is delivered to pressure P in the control mouth of pressure setting unit 40 through pipeline and corresponding passage, with the oil pressure of control by the inboard that outputs to Sealing 73 of pressure source 20 process pressure setting unit 40.Like this, the pressure of Sealing 73 inside and outside both sides is near balance, and Sealing 73 will be worked under the external and internal pressure near balance all the time, thereby has improved sealed environment, has guaranteed the turbidity test in the transmission device, has guaranteed the reliable sealing of lubricant oil.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. a pressure equaliser comprises pressure output (10), it is characterized in that, described pressure equaliser also comprises:
Pressure source (20);
Pressure acquisition element (30);
Pressure setting unit (40), the inlet opening of described pressure setting unit (40) is connected with the delivery outlet of described pressure source (20), the delivery outlet of described pressure setting unit (40) is connected with described pressure output (10), and the control mouth of described pressure setting unit (40) is connected with the delivery outlet of described pressure acquisition element (30).
2. pressure equaliser according to claim 1, it is characterized in that, described pressure setting unit (40) is pressure setting valve (41), described pressure setting valve (41) comprises inlet opening, delivery outlet and control mouth, the inlet opening of described pressure setting valve (41), delivery outlet and control mouth namely are respectively inlet opening, delivery outlet and the control mouth of described pressure setting unit (40), and the pressure of the control mouth of the pressure of the delivery outlet of described pressure setting valve (41) and described pressure setting valve (41) is the equal difference relation.
3. pressure equaliser according to claim 1 is characterized in that, described pressure setting unit (40) comprises reduction valve (42) and relief valve (43);
The inlet opening of described reduction valve (42) is connected with the delivery outlet of described pressure source (20) as the inlet opening of described pressure setting unit (40), the delivery outlet of described reduction valve (42) is connected with described pressure output (10) as the delivery outlet of described pressure setting unit (40), and the control mouth of described reduction valve (42) is connected with the delivery outlet of described pressure acquisition element (30) as the control mouth of described pressure setting unit (40);
The inlet opening of described relief valve (43) is connected with described pressure output (10), and the delivery outlet of described relief valve (43) is connected with fuel tank (50), and the control mouth of described relief valve (43) is connected with the control mouth of described reduction valve (42).
4. each described pressure equaliser in 3 according to claim 1 is characterized in that, described pressure equaliser also comprises the bypass Protective valve (60) that is connected between described pressure source (20) delivery outlet and the fuel tank (50).
5. each described pressure equaliser in 3 according to claim 1 is characterized in that, described pressure acquisition element (30) is leather bag or piston.
6. each described pressure equaliser in 3 according to claim 1 is characterized in that, described pressure source (20) is oil pump.
7. underground construction equipment, comprise transmission device (70) and pressure equaliser, described transmission device (70) comprises inner sealing chamber (71), it is characterized in that, described pressure equaliser is each described pressure equaliser in the claim 1 to 6, and described inner sealing chamber (71) is connected with the pressure output (10) of described pressure equaliser.
8. underground construction equipment according to claim 7 is characterized in that, the pressure acquisition element (30) of described transmission device (70) and described pressure equaliser is arranged in mud, and the pressure source of described pressure equaliser (20) is installed on the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536149 CN202851904U (en) | 2012-10-18 | 2012-10-18 | Pressure balancing device and underground construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536149 CN202851904U (en) | 2012-10-18 | 2012-10-18 | Pressure balancing device and underground construction equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202851904U true CN202851904U (en) | 2013-04-03 |
Family
ID=47983109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220536149 Expired - Lifetime CN202851904U (en) | 2012-10-18 | 2012-10-18 | Pressure balancing device and underground construction equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202851904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900833A (en) * | 2012-10-18 | 2013-01-30 | 上海中联重科桩工机械有限公司 | Pressure balancing device and method and underground construction equipment |
-
2012
- 2012-10-18 CN CN 201220536149 patent/CN202851904U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900833A (en) * | 2012-10-18 | 2013-01-30 | 上海中联重科桩工机械有限公司 | Pressure balancing device and method and underground construction equipment |
| CN102900833B (en) * | 2012-10-18 | 2016-05-25 | 上海中联重科桩工机械有限公司 | Pressure balancing device and method and underground construction equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20160525 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |