CN209925186U - Double-acting liquid-filled type clearance stepless adjusting and executing mechanism - Google Patents
Double-acting liquid-filled type clearance stepless adjusting and executing mechanism Download PDFInfo
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- CN209925186U CN209925186U CN201920560790.7U CN201920560790U CN209925186U CN 209925186 U CN209925186 U CN 209925186U CN 201920560790 U CN201920560790 U CN 201920560790U CN 209925186 U CN209925186 U CN 209925186U
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Abstract
The utility model relates to a two effect liquid filling formula clearance infinitely variable control actuating mechanism. The double-acting liquid-filled type clearance stepless adjusting actuating mechanism comprises an actuating mechanism shell, a clearance piston, a sealing assembly, a displacement sensor and a liquid filling control unit; the clearance piston divides the executing mechanism shell into a clearance volume cavity, a liquid filling cavity and a control cavity, and the liquid filling cavity and the control cavity are respectively connected with a liquid filling control unit; the liquid filling control unit and the displacement sensor are matched to control the liquid filling cavity and the liquid filling amount in the control cavity, and further the volume of the clearance volume cavity is adjusted. The clearance piston of the double-acting liquid-filling type clearance stepless adjusting actuating mechanism is not connected with a piston rod, and the stepless adjustment of the clearance volume is realized by controlling the liquid filling and discharging of the liquid filling cavity and the control cavity.
Description
Technical Field
The utility model relates to a reciprocating compressor tolerance adjusts technical field, especially relates to a two effect liquid filling formula clearance infinitely variable control actuating mechanism.
Background
The clearance stepless regulation air flow is a common reciprocating compressor air flow regulation method, the technology replaces a compressor cylinder head with a clearance regulation actuating mechanism, and changes the volume coefficient of a compressor by regulating the clearance volume of the compressor cylinder, thereby realizing stepless regulation of the compressor air flow, and having the advantages of small investment, safety, reliability, convenient regulation, superior performance and the like.
The clearance cavity volume of the clearance stepless adjusting actuator is controlled by the clearance cylinder barrel and the clearance piston. The existing clearance pistons are all provided with piston rods and are driven and locked in a hydraulic mode, an electric mode, a pneumatic mode, a mechanical mode and the like. Therefore, the actuating mechanism is long in structure and heavy in weight, some actuating mechanisms need to be additionally provided with supports, and some actuating mechanisms even affect the inspection and maintenance space after being modified.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a remedy prior art not enough, provide a two effect fill liquid formula clearance infinitely variable control actuating mechanism, do not connect the piston rod on the clearance piston, fill liquid through controlling filling liquid chamber and control chamber, realize the volumetric infinitely variable control of clearance, solved the problem that exists among the prior art.
The utility model discloses a realize through following technical scheme:
a double-acting liquid-filling type clearance stepless adjusting actuating mechanism comprises an actuating mechanism shell, a clearance piston, a sealing assembly, a displacement sensor and a liquid-filling control unit;
the clearance piston divides the actuating mechanism shell into a clearance volume cavity, a liquid filling cavity and a control cavity, and the liquid filling cavity and the control cavity are respectively connected with a liquid filling control unit;
the liquid filling control unit and the displacement sensor are matched to control the liquid filling amount in the liquid filling cavity and the control cavity, and further the volume of the clearance volume cavity is adjusted.
The sealing assembly is arranged between the clearance piston and the actuating mechanism shell and is used for preventing liquid media in the liquid filling cavity and the control cavity from leaking.
The double-acting liquid-filled type clearance stepless adjusting actuating mechanism further comprises a leakage monitoring cavity arranged between the clearance piston and the actuating mechanism shell, and the leakage monitoring cavity is used for monitoring the sealing performance of the sealing assembly.
The liquid charging control unit comprises a control cavity liquid discharge valve, a liquid charging cavity outlet valve, a flow limiting valve, an overflow valve, an oil tank, a hydraulic pump, a one-way valve, an energy accumulator, a liquid charging cavity inlet valve, a control cavity liquid inlet valve and a pipeline.
And a cavity recessed into the end face of the clearance piston is arranged on one end face of the clearance piston, and the cavity and the corresponding inner surface of the actuating mechanism shell form the liquid filling cavity.
The inner side wall of the executing mechanism shell 3 is provided with a range limiting step 3-6, one end of the clearance piston 4, which is provided with a liquid filling chamber 7, is provided with a boss matched with the range limiting step 3-6, the range limiting step is matched with the clearance piston to limit the collision between the clearance piston and the compressor piston, and the range limiting step, the executing mechanism shell, the outer side wall of the clearance piston and the boss of the clearance piston form the control cavity 6 together.
The leakage monitoring cavity is arranged on the inner side wall of the executing mechanism shell at the position of the stroke limiting step.
A leakage monitoring groove 3-2 is formed in the inner side wall of an executing mechanism shell 3 at the position of a range limiting step 3-6, a sealing component groove I and a sealing component groove II are formed in the executing mechanism shell 3 on the two sides of the leakage monitoring groove, and sealing components are arranged in the sealing component groove I and the sealing component groove II. The leakage monitoring groove 3-2, the side surface of the clearance piston 4, the sealing assembly 5 at the sealing assembly groove I and the sealing assembly groove II form a leakage monitoring cavity 8 together, and an output pipeline communicated with the leakage monitoring cavity is arranged on the side wall of the shell of the executing mechanism.
And a sealing assembly groove III is arranged on the outer side wall of the boss of the clearance piston, and a sealing assembly is arranged in the sealing assembly groove III.
The liquid medium of the liquid-filling control unit is hydraulic oil, compressor lubricating oil or a liquid medium with the boiling point higher than the highest working temperature of a compressor cylinder.
The double-acting liquid-filled clearance stepless adjusting actuating mechanism further comprises a heat exchange assembly, and the heat exchange assembly is arranged in the liquid-filled cavity.
The heat exchange assembly is used for cooling the actuating mechanism, the service life of the sealing assembly can be prolonged, the index of the compression process is reduced, the compression work is saved, and the working temperature of the liquid filling cavity is stabilized.
The heat exchange assembly is a heat exchange coil.
The double-acting liquid-filled clearance stepless adjusting actuating mechanism further comprises a pressure sensor and/or a temperature sensor.
The pressure sensor and the temperature sensor are arranged on the end cover of the actuating mechanism shell.
The utility model has the advantages that:
the double-acting liquid-filled type clearance stepless adjusting and executing mechanism is compact in structure, convenient to adjust, safe and reliable. The bidirectional stepless adjustment of the position of the clearance piston is realized by controlling the liquid charging and discharging of the liquid charging cavity and the control cavity; because the piston rod is not arranged, the axial length of the actuating mechanism is greatly shortened; the position of the clearance piston is locked by hydraulic force, so that the pressure change at the side of the cylinder can be buffered, and the service life of the actuating mechanism can be prolonged; by arranging the stroke limiting step, the collision between the clearance piston and the compressor piston can be prevented; by providing a leak monitoring chamber, it is possible to monitor whether the seal assembly is out of order.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the fill level control unit of FIG. 1;
FIG. 3 is a schematic structural view of a housing of the actuator of FIG. 1;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure, a liquid filling control unit 1, a displacement sensor 2, an actuator shell 3, a clearance piston 4, a sealing assembly 5, a control cavity 6, a liquid filling cavity 7, a leakage monitoring cavity 8, a clearance volume cavity 9, a heat exchange coil 10, a pressure sensor 11, a temperature sensor 12, a liquid discharge valve of a control cavity 1-1, an outlet valve of a liquid filling cavity 1-2, a flow limiting valve 1-3, an overflow valve 1-4, an oil tank 1-5, a hydraulic pump 1-6, a check valve 1-7, an energy accumulator 1-8, a liquid filling cavity inlet valve 1-9, a liquid inlet valve of a control cavity 1-10, an actuator cylinder 3-1, a leakage monitoring groove 3-2, a connecting flange 3-3, a communicating port of a control cavity 3-4, a liquid filling cavity outlet 3-5, a distance limiting step 3-6, an actuator shell end cover 3-7, a liquid filling cavity end cover, 3-8 charging chamber inlets; 3-9 leakage monitoring ports, 3-10 sealing component grooves I, 3-11 sealing component grooves II and 3-12 executing mechanism shell inner cavities.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
Example 1
As shown in fig. 1-3, the double-acting liquid-filled clearance stepless adjustment actuator is composed of a liquid-filled control unit 1, a displacement sensor 2, an actuator housing 3, a clearance piston 4, a sealing assembly 5 and a pipeline. The liquid charging control unit 1 mainly comprises a control cavity liquid discharge valve 1-1, a liquid charging cavity outlet valve 1-2, a flow limiting valve 1-3, an overflow valve 1-4, an oil tank 1-5, a hydraulic pump 1-6, a one-way valve 1-7, an energy accumulator 1-8, a liquid charging cavity inlet valve 1-9, a control cavity liquid inlet valve 1-10, a pipeline and the like.
The clearance piston divides the actuating mechanism shell into a clearance volume cavity 9, a liquid filling cavity 7 and a control cavity 6, and the liquid filling cavity and the control cavity are respectively connected with the liquid filling control unit 1;
the liquid filling control unit 1 and the displacement sensor 2 are matched to control the liquid filling amount in the liquid filling cavity 7 and the control cavity 6, and further the volume of the clearance volume cavity is adjusted.
And a cavity recessed into the end face of the clearance piston is arranged on one end face of the clearance piston 4, and the cavity and the corresponding inner surface of the actuating mechanism shell form the liquid filling cavity 7.
A leakage monitoring chamber 8 is also provided between the clearance piston and the actuator housing, said leakage monitoring chamber being used to monitor the tightness of the sealing assembly.
The inner side wall of the executing mechanism shell 3 is provided with a range limiting step 3-6, one end of the clearance piston 4, which is provided with a liquid filling chamber 7, is provided with a boss matched with the range limiting step 3-6, the range limiting step is matched with the clearance piston to limit the collision between the clearance piston and the compressor piston, and the range limiting step, the executing mechanism shell, the outer side wall of the clearance piston and the boss of the clearance piston form the control cavity 6 together.
A leakage monitoring groove 3-2 is formed in the inner side wall of an actuating mechanism shell 3 on the side of a clearance volume cavity of a stroke limiting step 3-6, a sealing component groove I and a sealing component groove II are formed in the actuating mechanism shell 3 on two sides of the leakage monitoring groove, and sealing components are arranged in the sealing component groove I and the sealing component groove II. The leakage monitoring groove 3-2, the side surface of the clearance piston 4, the sealing assembly 5 at the sealing assembly groove I and the sealing assembly groove II form a leakage monitoring cavity 8 together, and an output pipeline communicated with the leakage monitoring cavity is arranged on the side wall of the shell of the executing mechanism.
And a sealing assembly groove III is arranged on the outer side wall of the position of the clearance piston boss, and a sealing assembly is arranged in the sealing assembly groove III.
The displacement sensor 2 is connected with the side wall of the clearance piston at one side of the liquid filling control cavity and is used for determining the position of the clearance piston in the actuating mechanism shell.
In the initial state, a liquid inlet valve 1-10 of the control cavity and an outlet valve 1-2 of the liquid filling cavity are opened, and liquid is filled into the control cavity 6 by using a hydraulic pump 1-6; after a certain amount of liquid is filled, closing the liquid inlet valve 1-10 of the control cavity and the outlet valve 1-2 of the liquid filling cavity, opening the liquid outlet valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid filling cavity, and filling liquid into the liquid filling cavity 7 by using the hydraulic pump 1-6; after the gas in the control cavity 6 and the liquid filling cavity 7 is exhausted, the liquid discharge valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid filling cavity are closed.
And in the working state, the position of the clearance piston is calculated according to the air quantity regulation requirement. According to the displacement sensor 2, the control cavity 6 and the liquid filling cavity 7 are filled with liquid, the position control of the clearance piston 4 is realized, the volume stepless regulation of the clearance volume cavity 9 can be realized, and the requirement of the reciprocating compressor on the stepless regulation of the air quantity is met. If the clearance volume needs to be increased, the liquid inlet valve 1-10 of the control cavity and the outlet valve 1-2 of the liquid charging cavity are opened, liquid is charged into the control cavity 6 by using the hydraulic pump 1-6 or the energy accumulator 1-8, the clearance piston 4 is driven, the liquid amount in the liquid charging cavity 7 is reduced, and the outlet valve 1-2 of the liquid charging cavity and the liquid inlet valve 1-10 of the control cavity are controlled to be closed timely according to the displacement sensor 2. If the clearance volume needs to be reduced, the drain valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid charging cavity are opened, the liquid charging cavity 7 is charged with liquid by utilizing the hydraulic pump 1-6 or the energy accumulator 1-8, the clearance piston 4 is driven, the liquid amount in the liquid charging cavity 7 is increased, and the inlet valve 1-9 of the liquid charging cavity and the drain valve 1-1 of the control cavity are controlled to be closed at proper time according to the displacement sensor 2. When the position of the clearance piston is not adjusted, the liquid inlet valve 1-10 of the control cavity is opened, and hydraulic locking of the clearance piston is realized by using the medium pressure of the energy accumulator 1-8. The executing mechanism shell 3 is provided with a leakage monitoring groove 3-2, and a leakage monitoring cavity 8 is formed by the executing mechanism shell, the side surface of the clearance piston 4 and a sealing component 5 arranged in the leakage monitoring groove 3-2 together and is used for monitoring whether the sealing component fails or not and ensuring the safe operation of the executing mechanism; setting a limit step 3-6 to prevent the collision between the clearance piston and the compressor piston; a connecting flange 3-3 is provided for connecting the actuator to the compressor cylinder. The control cavity 6, the liquid filling cavity 7, the leakage monitoring cavity 8 and the clearance volume cavity 9 are sealed through the sealing assemblies 5 on the inner side wall of the actuating mechanism shell 3 and on the clearance piston.
Example 2
As shown in fig. 4, the double-acting liquid-filled type clearance stepless adjusting and executing mechanism is a double-acting liquid-filled type clearance stepless adjusting and executing mechanism with a heat exchange coil, and the double-acting liquid-filled type clearance stepless adjusting and executing mechanism is composed of a liquid-filled control unit 1, a displacement sensor 2, an executing mechanism shell 3, a clearance piston 4, a sealing assembly 5, a heat exchange coil 10, a pressure sensor 11, a temperature sensor 12, a pipeline and the like. The liquid charging control unit 1 mainly comprises a control cavity liquid discharge valve 1-1, a liquid charging cavity outlet valve 1-2, a flow limiting valve 1-3, an overflow valve 1-4, an oil tank 1-5, a hydraulic pump 1-6, a one-way valve 1-7, an energy accumulator 1-8, a liquid charging cavity inlet valve 1-9, a control cavity liquid inlet valve 1-10, a pipeline and the like.
The clearance piston divides the actuating mechanism shell into a clearance volume cavity 9, a liquid filling cavity 7 and a control cavity 6, wherein the liquid filling cavity 7 and the control cavity 6 are respectively connected with the liquid filling control unit 1;
the liquid filling control unit 1 and the displacement sensor 2 are matched to control the liquid filling amount in the liquid filling cavity and the control cavity, and further the volume of the clearance volume cavity 9 is adjusted.
And a cavity recessed into the end face of the clearance piston is arranged on one end face of the clearance piston 4, and the cavity and the corresponding inner surface of the actuating mechanism shell form the liquid filling cavity 7.
A leakage monitoring chamber 8 is also provided between the clearance piston 4 and the actuator housing 3, said leakage monitoring chamber being used to monitor the tightness of the sealing arrangement.
The inner side wall of the executing mechanism shell 3 is provided with a range limiting step 3-6, the outer side wall of one end of the clearance piston 4, which is provided with a liquid filling cavity 7, is provided with a boss matched with the range limiting step 3-6, the range limiting step is matched with the clearance piston to limit the collision between the clearance piston and a compressor piston, and the range limiting step, the executing mechanism shell, the outer side wall of the clearance piston and the boss of the clearance piston form the control cavity 6 together.
A leakage monitoring groove 3-2 is formed in the inner side wall of an actuating mechanism shell 3 on the clearance volume cavity side of a stroke limiting step 3-6, a sealing component groove I and a sealing component groove II are formed in the actuating mechanism shell 3 on the two sides of the leakage monitoring groove 3-2, and a sealing component 5 is arranged in the sealing component groove I and the sealing component groove II. The leakage monitoring groove 3-2, the side surface of the clearance piston 4, the sealing assembly 5 at the sealing assembly groove I and the sealing assembly groove II form a leakage monitoring cavity 8 together, and an output pipeline communicated with the leakage monitoring cavity is arranged on the side wall of the shell of the executing mechanism.
And a sealing assembly groove III is formed in the outer side wall of the position of the clearance piston boss, and a sealing assembly 5 is arranged in the sealing assembly groove III.
A supporting rod can be arranged on the side wall of the clearance piston at one side of the liquid filling cavity, and the displacement sensor 2 is arranged on the supporting rod; the heat exchange coil 10 is arranged outside the supporting rod. The inlet and the outlet of the heat exchange coil respectively penetrate out of the end cover of the shell of the actuating mechanism, and the actuating mechanism is cooled by the heat exchange medium in the heat exchange coil.
In the initial state, a liquid inlet valve 1-10 of the control cavity and an outlet valve 1-2 of the liquid filling cavity are opened, and liquid is filled into the control cavity 6 by using a hydraulic pump 1-6; after a certain amount of liquid is filled, closing the liquid inlet valve 1-10 of the control cavity and the outlet valve 1-2 of the liquid filling cavity, opening the liquid outlet valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid filling cavity, and filling liquid into the liquid filling cavity 7 by using the hydraulic pump 1-6; after the gas in the control cavity 6 and the liquid filling cavity 7 is exhausted, the liquid discharge valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid filling cavity are closed.
And in the working state, the position of the clearance piston 4 is calculated according to the air quantity regulation requirement. According to the displacement sensor 2, the control cavity 6 and the liquid filling cavity 7 are filled with liquid, the position control of the clearance piston 4 is realized, the volume stepless regulation of the clearance volume cavity 9 can be realized, and the requirement of the reciprocating compressor on the stepless regulation of the air quantity is met. If the clearance volume needs to be increased, the liquid inlet valve 1-10 of the control cavity and the outlet valve 1-2 of the liquid charging cavity are opened, liquid is charged into the control cavity 6 by using the hydraulic pump 1-6 or the energy accumulator 1-8, the clearance piston 4 is driven, the liquid amount in the liquid charging cavity 7 is reduced, and the outlet valve 1-2 of the liquid charging cavity and the liquid inlet valve 1-10 of the control cavity are controlled to be closed timely according to the displacement sensor 2. If the clearance volume needs to be reduced, the drain valve 1-1 of the control cavity and the inlet valve 1-9 of the liquid charging cavity are opened, the liquid charging cavity 7 is charged with liquid by utilizing the hydraulic pump 1-6 or the energy accumulator 1-8, the clearance piston 4 is driven, the liquid amount in the liquid charging cavity 7 is increased, and the inlet valve 1-9 of the liquid charging cavity and the drain valve 1-1 of the control cavity are controlled to be closed at proper time according to the displacement sensor 2. When the position of the clearance piston is not adjusted, the liquid inlet valve 1-10 of the control cavity is opened, and hydraulic locking of the clearance piston is realized by using the medium pressure of the energy accumulator 1-8. The executing mechanism shell 3 is provided with a leakage monitoring groove 3-2 which forms a leakage monitoring cavity 8 together with the side surface of the clearance piston 4 and the sealing component 5 for monitoring whether the sealing component is invalid or not and ensuring the safe operation of the executing mechanism; setting a limit step 3-6 to prevent the collision between the clearance piston and the compressor piston; a connecting flange 3-3 is provided for connecting the actuator to the compressor cylinder. The control cavity 6, the liquid filling cavity 7, the leakage monitoring cavity 8 and the clearance volume cavity 9 are sealed through the sealing assembly 5. The heat exchange coil 10 is arranged for cooling the actuating mechanism, so that the service life of the sealing assembly is prolonged, the index of the compression process can be reduced, and the compression work is saved; the working temperature of the liquid filling cavity can be stabilized, and the size of the clearance volume is kept stable. The pressure sensor 11 and the temperature sensor 12 are arranged, so that the operating condition of the actuating mechanism can be better observed, and a basis is provided for safe operation and fault diagnosis.
The embodiment of the utility model discloses an interior replacement heat coil pipe that sets up of liquid filling intracavity at two effect liquid filling formula clearance infinitely variable control actuating mechanism sets up pressure sensor 11 and temperature sensor 12 at the actuating mechanism end cover for clearance volumetric regulation operation is reliable and more stable, is favorable to clearance governing system long period safety operation.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (8)
1. A double-acting liquid-filling type clearance stepless adjusting actuating mechanism is characterized by comprising an actuating mechanism shell, a clearance piston, a sealing assembly, a displacement sensor and a liquid-filling control unit;
the clearance piston divides the actuating mechanism shell into a clearance volume cavity, a liquid filling cavity and a control cavity, and the liquid filling cavity and the control cavity are respectively connected with a liquid filling control unit;
the liquid filling control unit and the displacement sensor are matched for controlling the liquid filling cavity and the liquid filling amount in the control cavity, so that the volume of the clearance volume cavity is adjusted;
the sealing assembly is arranged between the clearance piston and the actuating mechanism shell and is used for preventing liquid media in the liquid filling cavity and the control cavity from leaking;
the sealing assembly further comprises a leakage monitoring cavity arranged between the clearance piston and the actuating mechanism shell, and the leakage monitoring cavity is used for monitoring the sealing performance of the sealing assembly.
2. A double acting liquid filled clearance stepless adjustment actuator of claim 1 wherein the liquid filled control unit comprises a control chamber drain valve, a liquid filled chamber outlet valve, a flow limiting valve, an overflow valve, an oil tank, a hydraulic pump, a check valve, an accumulator, a liquid filled chamber inlet valve, a control chamber liquid inlet valve and a pipe.
3. A dual acting liquid-filled clearance stepless adjustment actuator of claim 1 wherein the liquid-filled cavity is formed by a clearance piston end surface and an actuator housing inner surface; the inner side wall of the executing mechanism shell is provided with a stroke limiting step, the stroke limiting step is matched with the clearance piston to limit the collision between the clearance piston and the compressor piston, and the stroke limiting step, the executing mechanism shell and the outer side wall of the clearance piston form the control cavity.
4. A dual-action liquid-filled clearance stepless adjustment actuator according to claim 3, wherein a chamber is provided on the clearance piston recessed into the end face of the clearance piston, said chamber forming with its corresponding actuator housing inner surface said liquid-filled cavity.
5. A double acting liquid-filled clearance stepless adjustment actuator of claim 1, wherein the liquid medium of the liquid-filled control unit is hydraulic oil, compressor lubricating oil or a liquid medium with a boiling point higher than the maximum operating temperature of the compressor cylinder.
6. A double acting liquid-filled clearance stepless adjustment actuator of claim 1, further comprising a heat exchange assembly disposed within the liquid-filled cavity.
7. A double acting liquid-filled clearance stepless adjustment actuator according to claim 6, characterized by further comprising a pressure sensor, and/or a temperature sensor.
8. A dual action liquid-filled clearance stepless adjustment actuator of claim 7 wherein the pressure sensor and the temperature sensor are both located on an actuator housing end cap of the liquid-filled chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920560790.7U CN209925186U (en) | 2019-04-22 | 2019-04-22 | Double-acting liquid-filled type clearance stepless adjusting and executing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920560790.7U CN209925186U (en) | 2019-04-22 | 2019-04-22 | Double-acting liquid-filled type clearance stepless adjusting and executing mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN209925186U true CN209925186U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920560790.7U Active CN209925186U (en) | 2019-04-22 | 2019-04-22 | Double-acting liquid-filled type clearance stepless adjusting and executing mechanism |
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| Country | Link |
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| CN (1) | CN209925186U (en) |
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