CN206830568U - A kind of servomotor - Google Patents
A kind of servomotor Download PDFInfo
- Publication number
- CN206830568U CN206830568U CN201720585256.2U CN201720585256U CN206830568U CN 206830568 U CN206830568 U CN 206830568U CN 201720585256 U CN201720585256 U CN 201720585256U CN 206830568 U CN206830568 U CN 206830568U
- Authority
- CN
- China
- Prior art keywords
- cavity
- oil
- piston
- throttle orifice
- servomotor
- Prior art date
- 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 discloses a kind of servomotor, including cylinder body, piston and piston rod, piston is located in cylinder body, and inner chamber of cylinder block is divided into the first cavity and the second cavity by piston, first cavity and the first oil communication, second cavity and the second oil communication, the first oil communication oil return pipe, the second oil communication pressure oil pipe, one end of piston rod is connected with piston, the lever of the other end and adjusting air valve links, and throttle orifice is provided with the piston, and throttle orifice connects the first cavity and the second cavity.The aperture very little of the throttle orifice of the utility model servomotor, the faint liquid stream that the first cavity is flowed to by the second cavity all the time during servomotor works, in throttle orifice be present；This faint liquid stream neither influences the current location of piston, and and can avoids the second cavity from turning into region of bypassed oil.
Description
Technical field
Machinery equipment field is the utility model is related to, more particularly to it is a kind of for controlling the oil of normally opened or normally closed air valve to move
Machine.
Background technology
Servomotor is a kind of equipment for being used to control the air valve of steam turbine or gas turbine.Fig. 1 is to be used in the prior art
The unilateral feeding type servomotor of normally opened or normally closed air valve, including cylinder body, piston and piston rod, piston is controlled to be located in cylinder body, it is living
Inner chamber of cylinder block is divided into the first cavity and the second cavity, the first cavity and the first oil communication, the second cavity and the second oil by plug
Road is connected, the first oil communication oil return pipe, the second oil communication pressure oil pipe, and one end of piston rod is connected with piston, the other end
Link with the lever of adjusting air valve.In most cases, in order to realize that the air valve of steam turbine/gas turbine is normally opened or normally closed,
Pressure oil pipe must keep the oil pressure in the second cavity to be higher than the first cavity.
It will be apparent that in considerable time, the hydraulic oil in the second cavity is to be in actionless state, and second is empty
Chamber is referred to as " region of bypassed oil ".Hydraulic oil in region of bypassed oil is easy to go bad under the double action of long-term lacking flowing and high temperature, special
It is not that existing unit largely uses fire-resistance oil as hydraulic oil, this hydraulic oil emulsion deterioration can cause pH value to decline in acid
Property, very strong corrosivity is respectively provided with to pipeline, oil cylinder and seal.
Utility model content
The technical problems to be solved in the utility model is to provide the servomotor after a kind of improvement, avoids the hydraulic pressure near piston
Oily long inactivity is motionless.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of servomotor, including cylinder body, work
Plug and piston rod, piston are located in cylinder body, and inner chamber of cylinder block is divided into the first cavity and the second cavity by piston, the first cavity and the
One oil communication, the second cavity and the second oil communication, the first oil communication oil return pipe, the second oil communication pressure oil pipe are living
One end of stopper rod is connected with piston, and the lever of the other end and adjusting air valve links, and throttle orifice, throttle orifice are provided with the piston
Connect the first cavity and the second cavity.The aperture very little of throttle orifice, during servomotor works, exist all the time by the in throttle orifice
Two cavitys flow to the faint liquid stream of the first cavity；This faint liquid stream neither influences the current location of piston, and and can avoids second
Cavity turns into region of bypassed oil.
Further, the aperture of the throttle orifice is no more than 1mm.
Further, servomotor also includes the 3rd oil circuit, the 3rd oil communication oil return pipe and the second cavity, in the 3rd oil circuit
Safety valve is installed；Steam turbine/gas turbine is likely to occur some special circumstances at work, causes the piston rod for connecting air valve
Stress increases suddenly, and now, the oil pressure in the second cavity increases sharply, and safety valve automatically turns on pressure release, ensures safety.
Beneficial effect：Servomotor of the present utility model is provided with throttle orifice on piston, exists all the time in throttle orifice by the
Two cavitys flow to the faint liquid stream of the first cavity, prevent the second cavity to be referred to as region of bypassed oil, avoid hydraulic pressure deterioration of oil.
Brief description of the drawings
Fig. 1 is prior art servomotor structural representation.
Fig. 2 is the servomotor structural representation of embodiment 1.
Fig. 3 is Fig. 2 A enlarged drawings.
Wherein：1st, cylinder body；2nd, piston；3rd, piston rod；4th, the first cavity；5th, the second cavity；6th, the first oil circuit；7th, the second oil
Road；8th, throttle orifice
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Figures 2 and 3, the servomotor of the present embodiment includes cylinder body 1, piston 2 and piston rod 3, and piston 2 is located at cylinder body
In 1, the inner chamber of cylinder body 1 is divided into the first cavity 4 and the second cavity 5 by piston 2, and the first cavity 4 connects with the first oil circuit 6, and second
The oil circuit 7 of cavity 5 and second and the 3rd oil communication, the first oil circuit 6 connection oil return pipe, the second oil circuit 7 connection pressure oil pipe, piston
One end of bar 3 is connected with piston 2, and the lever of the other end and adjusting air valve links, and it is 0.5mm to be provided with aperture on the piston 2
Throttle orifice 8, throttle orifice 8 connects the first cavity 4 and the second cavity 5；3rd oil communication oil return pipe, it is provided with the 3rd oil circuit
Safety valve.
The servomotor of the present embodiment is used to control the normally opened or normally closed air valve on steam turbine/gas turbine, the work of servomotor
The state that plug 2 will be chronically at shown in Fig. 2, wherein the oil pressure in the second cavity 5 is higher than the oil pressure in the first cavity 4.It will be apparent that
All the time the faint liquid stream that the first cavity 4 is flowed to by the second cavity 5 in throttle orifice 8 be present；Due to the aperture very little of throttle orifice 8, section
Maximum fluid flow in discharge orifice 8 is well below the maximum fluid flow in pressure oil pipe, therefore this faint liquid stream neither shadow
The current location of piston 2 is rung, and can avoids the second cavity 5 from turning into region of bypassed oil, can prevent hydraulic pressure deterioration of oil.
Although embodiment of the present utility model is illustrated in specification, these embodiments are intended only as carrying
Show, should not limit the scope of protection of the utility model.Various omissions are carried out in the range of the utility model aims are not departed from, are put
Change and change should be included in the scope of protection of the utility model.
Claims (3)
1. a kind of servomotor, including cylinder body, piston and piston rod, piston is located in cylinder body, and inner chamber of cylinder block is divided into by piston
One cavity and the second cavity, the first cavity and the first oil communication, the second cavity and the second oil communication, the first oil communication return
Oil pipe, the second oil communication pressure oil pipe, one end of piston rod are connected with piston, and the lever of the other end and adjusting air valve links,
It is characterized in that：Throttle orifice is provided with the piston, throttle orifice connects the first cavity and the second cavity.
2. servomotor according to claim 1, it is characterised in that：The aperture of the throttle orifice is no more than 1mm.
3. servomotor according to claim 1 or 2, it is characterised in that：Also include the 3rd oil circuit, the 3rd oil communication oil return
Pipe and the second cavity, safety valve is installed in the 3rd oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585256.2U CN206830568U (en) | 2017-05-24 | 2017-05-24 | A kind of servomotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585256.2U CN206830568U (en) | 2017-05-24 | 2017-05-24 | A kind of servomotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830568U true CN206830568U (en) | 2018-01-02 |
Family
ID=60772390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720585256.2U Expired - Fee Related CN206830568U (en) | 2017-05-24 | 2017-05-24 | A kind of servomotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206830568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260028A (en) * | 2019-06-24 | 2019-09-20 | 中国神华煤制油化工有限公司 | A kind of anti-leak oil motor |
-
2017
- 2017-05-24 CN CN201720585256.2U patent/CN206830568U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260028A (en) * | 2019-06-24 | 2019-09-20 | 中国神华煤制油化工有限公司 | A kind of anti-leak oil motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180102 Termination date: 20210524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |