CN112700982A - Hydraulic operating mechanism of circuit breaker - Google Patents
Hydraulic operating mechanism of circuit breaker Download PDFInfo
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- CN112700982A CN112700982A CN202011467605.3A CN202011467605A CN112700982A CN 112700982 A CN112700982 A CN 112700982A CN 202011467605 A CN202011467605 A CN 202011467605A CN 112700982 A CN112700982 A CN 112700982A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 62
- 238000009434 installation Methods 0.000 claims description 18
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/24—Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
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- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a hydraulic operating mechanism of a circuit breaker, which comprises: the operating mechanism body comprises a shell, and a low-pressure oil inlet channel and a high-pressure oil outlet channel are arranged in the shell; oil pump assembly, with operating mechanism body fixed connection, oil pump assembly includes: a pump body; the eccentric shaft is rotatably arranged on the pump body; at least one plunger pair fixed on the pump body; the high-pressure oil way is arranged in the pump body and is communicated with the oil discharge port of the plunger pair and the high-pressure oil discharge channel; one end of the connecting seat is fixedly connected with the pump body, and the other end of the connecting seat is fixedly connected with the shell; the hydraulic operating mechanism of the circuit breaker further comprises an oil cavity communicated with the low-pressure oil inlet channel, the oil cavity is at least defined by the pump body, the connecting seat and the shell, and an oil inlet of the plunger pair is located in the oil cavity. The oil cavity in the invention is not formed by the pump body, so that the structure of the pump body can be simplified, and the shell of the operating mechanism body is fully utilized, so that the structure is more compact.
Description
Technical Field
The invention relates to a hydraulic operating mechanism of a circuit breaker.
Background
The hydraulic operating mechanism of the circuit breaker is characterized in that normal high pressure is maintained and instantaneously acts, a hydraulic system maintains high pressure for a long time, the hydraulic operating mechanism outputs power during opening and closing operations, the pressure of the system can be reduced, an oil pump needs to be started in time to supplement the pressure of the hydraulic system, a trace amount of leakage exists in the hydraulic system during normal operation, the pressure can also be reduced, and the oil pump needs to be started to supplement the pressure.
For example, the oil pump assembly disclosed in chinese patent application with application publication No. CN111207052A includes a pump body including a support and a pump cover which are separately connected, the support and the pump cover enclosing to form an oil chamber, an eccentric shaft rotatably mounted on the support and the pump cover, and an eccentric portion of the eccentric shaft being located in the oil chamber. Two plunger pairs are arranged in the oil cavity, the plunger pairs are fixedly mounted on the support, and plungers of the plunger pairs are matched with the eccentric part of the eccentric shaft and used for absorbing oil and discharging oil.
The structure of the pump body is complex, the support of the pump body needs to be enclosed into an oil cavity together with the pump cover, namely the oil cavity is completely formed by the pump body, in addition, the support needs to rotate to install the eccentric shaft, needs to integrally set the motor installation seat and simultaneously needs to set the filter installation structure, so that the structure of the support is very complex, the processing difficulty is high, and the manufacturing cost is high. In addition, the pump cover is required to rotate to be provided with the eccentric shaft and also to form an oil cavity with the support, so that the structure of the pump cover is complex, and the processing difficulty and the manufacturing cost are increased.
Disclosure of Invention
The invention aims to provide a hydraulic operating mechanism of a circuit breaker, which aims to solve the problem that the structure of a pump body is complicated because an oil cavity is formed by the pump body in the prior art.
In order to achieve the purpose, the hydraulic operating mechanism of the circuit breaker adopts the following technical scheme:
a circuit breaker hydraulic actuator comprising:
the operating mechanism comprises an operating mechanism body, wherein the operating mechanism body comprises a shell, and a low-pressure oil inlet channel communicated with an oil tank and a high-pressure oil outlet channel communicated with a high-pressure system of the operating mechanism body are arranged in the shell;
oil pump assembly, with operating mechanism body fixed connection, oil pump assembly includes:
a pump body;
the eccentric shaft is rotatably arranged on the pump body and is provided with an eccentric part;
the plunger pair is fixed on the pump body and provided with an oil suction port, an oil discharge port and a plunger, and the plunger of the plunger pair is in pushing fit with the eccentric part so as to suck oil and discharge oil;
the high-pressure oil way is arranged in the pump body and is communicated with the oil discharge port of the plunger pair and the high-pressure oil discharge channel;
one end of the connecting seat is fixedly connected with the pump body, and the other end of the connecting seat is fixedly connected with the shell;
the hydraulic operating mechanism of the circuit breaker further comprises an oil cavity communicated with the low-pressure oil inlet channel, the oil cavity is at least defined by the pump body, the connecting seat and the shell, and an oil inlet of the plunger pair is located in the oil cavity.
The beneficial effects of the above technical scheme are that: the invention provides a breaker hydraulic operating mechanism with an oil pump assembly and an operating mechanism body directly and fixedly connected together, and in order to facilitate oil feeding and oil discharging, a low-pressure oil feeding channel communicated with an oil tank and a high-pressure oil discharging channel communicated with a high-pressure system of the operating mechanism body are arranged in a shell of the operating mechanism body; the oil pump subassembly includes the pump body, vice and the connecting seat of plunger, the oil absorption and the oil extraction of vice plunger are realized with the vice cooperation of plunger to the eccentric shaft of installation on the pump body, the high-pressure oil circuit that sets up in the pump body makes things convenient for high-pressure fluid to get into high-pressure oil extraction passageway, connecting seat one end and pump body fixed connection, the other end and casing fixed connection, at least by the connecting seat, the oil pocket is enclosed jointly to the pump body and casing, rather than leaning on pump body self to form the oil pocket entirely, not only can simplify the structure of the pump body, make full use of the casing of operating mechanism body.
Furthermore, in order to facilitate the communication between the high-pressure oil path and the high-pressure oil discharge channel, the oil pump assembly further comprises a connecting sleeve, one end of the connecting sleeve is communicated with the high-pressure oil path on the pump body, and the other end of the connecting sleeve is communicated with the high-pressure oil discharge channel on the shell.
Furthermore, in order to facilitate installation of the connecting sleeve, the connecting sleeve is inserted and fixed between the pump body and the casing, a first inserting hole for inserting one end of the connecting sleeve is formed in an outlet of the high-pressure oil way in the pump body, the aperture of the first inserting hole is larger than that of the high-pressure oil way, a second inserting hole for inserting the other end of the connecting sleeve is formed in an inlet of the high-pressure oil discharge channel in the casing, and the aperture of the second inserting hole is larger than that of the high-pressure oil discharge channel.
Furthermore, in order to facilitate the fixed connection between the connecting seat and the shell, a sinking groove for the end part of the connecting seat to sink into is arranged on the shell, a flange which is in stop fit with the end face of the shell is arranged on the connecting seat, and the flange is fixedly connected on the shell through a screw.
Furthermore, in order to conveniently filter oil entering the oil cavity and simplify the structure of the pump body, a filter communicated with the low-pressure oil inlet channel is arranged in the shell.
Furthermore, in order to ensure that the working pressure and the discharge capacity of the oil pump meet the requirements of a hydraulic operating mechanism, the diameter and the sectional area of each plunger are reduced simultaneously, so that the acting force of high-pressure oil on the plungers and the load torque of the oil pump are reduced, at least two plunger pairs are arranged, each plunger pair is uniformly distributed and arranged in a circumferential manner around the rotating axis of the eccentric shaft, the oil pump assembly further comprises a fixed cover fixedly connected with the pump body, one plunger pair is arranged in the inner cavity of the fixed cover, and the oil cavity is defined by the fixed cover, the pump body, the connecting seat and the shell.
Furthermore, in order to facilitate the installation of the eccentric shaft and the matching of the plunger pair and the eccentric part, a mounting cavity for rotatably installing the eccentric shaft is arranged in the pump body, the eccentric part is positioned in the mounting cavity, and an extending hole which is communicated with the mounting cavity and used for enabling the plunger of the plunger pair to extend into is also arranged on the pump body.
Furthermore, in order to ensure the stable rotation of the eccentric shaft, a first bearing in running fit with the end part of the eccentric shaft and a second bearing in running fit with the middle part of the eccentric shaft are arranged in the mounting cavity, and the first bearing and the second bearing are respectively positioned on two sides of the eccentric part.
Furthermore, in order to facilitate the installation of the first bearing, the oil pump assembly further comprises a plugging plug fixedly connected with the pump body to plug the end part of the installation cavity, and the end part of the first bearing abuts against the plugging plug.
Furthermore, in order to facilitate the rotation of the driving eccentric shaft, the installation of the motor and the simplification of the structure of the pump body are facilitated, the oil pump assembly further comprises a motor support and the motor installed on the motor support, and the motor support is fixed on the pump body through screws.
Drawings
Fig. 1 is a partial structural view of an embodiment 1 of a hydraulic operating mechanism of a circuit breaker according to the present invention;
FIG. 2 is a top view of the two plunger pairs of FIG. 1 engaged with an eccentric shaft;
FIG. 3 is a perspective view of the pump body of FIG. 1;
fig. 4 is a partial structural view of an embodiment 2 of a hydraulic operating mechanism of a circuit breaker according to the present invention;
fig. 5 is a partial plan view of an embodiment 3 of a hydraulic actuator for a circuit breaker according to the present invention.
In the figure: 100-an oil chamber; 1-fixing the cover; 2-blocking; 3-a connecting seat; 4-a motor support; 5' -a pump body; 5-a pump body; 51-a mounting cavity; 52-an access hole; 53-first connection hole; 54-high pressure oil way inlet; 55-a first receptacle; 56-second connection hole; 57-a seal ring mounting groove; 58-third connection hole; 59-high pressure oil circuit; 6-a shell; 61-low pressure oil inlet channel; 62-high pressure oil drain channel; 7-a motor; 71-motor output shaft; 8-rotation stopping sleeve; 9-eccentric shaft; 10-a second bearing; 11-a rotary shaft seal; 12-a first bearing; 13-plunger pair; 131-a plunger; 132-a spring; 133-oil suction; 134-oil drain port; 14-a shaft sleeve; 15-connecting sleeves; 16-a filter; 17-a first sealing ring; 18-a second sealing ring; 19-a third sealing ring; 20-a fourth seal ring; 21-a fifth sealing ring; 22-sixth sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The oil pump assembly is directly and fixedly connected with the operating mechanism body, the oil pump assembly comprises a pump body 5 and an eccentric shaft 9 rotatably mounted on the pump body 5, as shown in fig. 3, a mounting cavity 51 for rotatably mounting the eccentric shaft 9 is formed in the pump body 5, the mounting cavity 51 is vertically through, and an eccentric part on the eccentric shaft 9 is located in the mounting cavity 51. As shown in fig. 1, the first bearing 12 is rotatably fitted to the lower end of the eccentric shaft 9 in the mounting cavity 51, and the mounting of the first bearing 12 is facilitated by the lower end opening of the mounting cavity 51. The oil pump assembly further comprises a sealing plug 2 fixedly connected with the pump body 5 to seal the lower end of the mounting cavity 51, and the end part of the first bearing 12 abuts against the sealing plug 2 to realize the positioning of the first bearing 12. In addition, a third sealing ring 19 is provided between the sealing plug 2 and the pump body 5 in order to ensure sealing. For the convenience of connection, as shown in fig. 3, a third connection hole 58 for fixedly connecting the plug 2 is provided in the pump body 5.
Still install in the installation cavity 51 with the middle part normal running fit's of eccentric shaft 9 second bearing 10, second bearing 10 and first bearing 12 are located eccentric portion's upper and lower both sides respectively, and second bearing 10 is located the upper end accent department of installation cavity 51, in order to guarantee the leakproofness, is provided with rotatory bearing seal 11 between eccentric shaft 9 and installation cavity 51, and rotatory bearing seal 11 is located the inboard of second bearing 10.
As shown in fig. 1, the oil pump assembly further includes a motor support 4 and a motor 7 mounted on the motor support 4, and the motor support 4 is fixed to the pump body 5 by screws. The motor output shaft 71 of the motor 7 is connected with a rotation stopping sleeve 8 through a key in a rotation stopping way, the upper end of the eccentric shaft 9 is also inserted into the rotation stopping sleeve 8 and is in transmission connection with the rotation stopping sleeve 8 through the key, and the rotation stopping sleeve 8 is positioned in the motor support 4.
The oil pump assembly further comprises two plunger pairs 13, as shown in connection with fig. 2, the plunger pairs 13 having an oil suction port 133, an oil discharge port 134, a spring 132 and a plunger 131. The two plunger pairs 13 are fixed on the pump body 5 and are uniformly distributed circumferentially around the rotation axis of the eccentric shaft 9, and as shown in fig. 3, a first connection hole 53 for fixedly connecting the plunger pairs 13 is formed in the pump body 5. As shown in fig. 1, a high-pressure oil passage 59 is provided in the pump body 5, the high-pressure oil passage inlet 54 communicates with the oil discharge port 134 of the plunger sub 13, and an outlet of the high-pressure oil passage 59 communicates with the high-pressure oil discharge passage 62. The plunger 131 of the plunger pair 13 is in pushing fit with the eccentric portion to suck and discharge oil, and as shown in fig. 3, the pump body 5 is further provided with an insertion hole 52 communicated with the mounting cavity 51 and into which the plunger 131 of the plunger pair 13 is inserted, in order to facilitate the fitting.
As shown in fig. 3, the middle portion of the pump body 5 is a square block structure, the left and right sides are provided with bump structures, the first connection hole 53 and the high-pressure oil inlet 54 are both disposed on the bump structures, and the installation cavity 51 is disposed on the square block structure. As shown in fig. 1, the oil pump assembly further includes a connecting base 3 having one end fixedly connected to the pump body 5 and the other end fixedly connected to the housing 6, the connecting base 3 is integrally cylindrical, and the left end of the connecting base 3 is fixed to the right side of the block structure by a screw, and therefore, a second connecting hole 56 is formed in the right side of the block structure. To ensure the sealing property, the first sealing ring 17 is provided between the connection seat 3 and the pump body 5, and thus a sealing ring installation groove 57 is provided on the pump body 5.
As shown in fig. 1, the housing 6 is provided with a sinking groove into which the right end of the connecting socket 3 is sunk, and a fourth sealing ring 20 is disposed between the connecting socket 3 and a groove wall of the sinking groove to ensure sealing performance. And, the connecting seat 3 is provided with a flange which is matched with the end face of the shell 6 in a stop way, and the flange is fixedly connected to the shell 6 through a screw.
The oil pump assembly further comprises a connecting sleeve 15, one end of the connecting sleeve is communicated with a high-pressure oil way 59 on the pump body 5, the other end of the connecting sleeve is communicated with a high-pressure oil discharge channel 62 on the shell 6, the connecting sleeve 15 is inserted and fixed between the pump body 5 and the shell 6 for convenience of installation, and the connecting sleeve 15 can be clamped and fixed after the connecting seat 3 is fixedly connected with the shell 6. Specifically, the pump body 5 is provided with a first insertion hole 55 (as shown in fig. 3) at the outlet of the high-pressure oil passage 59, into which the left end of the connection sleeve 15 is inserted, the aperture of the first insertion hole 55 is larger than that of the high-pressure oil passage 59, the housing 6 is provided with a second insertion hole at the inlet of the high-pressure oil discharge passage 62, into which the right end of the connection sleeve 15 is inserted, and the aperture of the second insertion hole is larger than that of the high-pressure oil discharge passage 62. In order to ensure the sealing performance, a fifth sealing ring 21 is arranged between the connecting sleeve 15 and the pump body 5, and a sixth sealing ring 22 is arranged between the connecting sleeve 15 and the shell 6.
As shown in fig. 1, the oil pump assembly further includes a fixing cover 1 fixedly connected to the pump body 5, the fixing cover 1 is cup-shaped, the right end of the fixing cover 1 is fixed to the left side of the square block structure by screws, in order to ensure the sealing performance, a second sealing ring 18 is disposed between the fixing cover 1 and the pump body 5, and a sealing ring mounting groove 57 is correspondingly disposed on the pump body 5, that is, the structure of the pump body 5 is substantially bilaterally symmetrical, and only for mounting the connecting sleeve 15, a first insertion hole 55 needs to be disposed, so that a part of the right-side protruding block structure is increased.
As shown in fig. 1, one of the two plunger pairs 13 is located in the connecting seat 3, the other is located in the fixed cover 1, the pump body 5, the blocking plug 2, the connecting seat 3 and the housing 6 jointly enclose an oil cavity 100, the oil cavity 100 is communicated with the low-pressure oil inlet channel 61, and oil inlets of the two plunger pairs 13 are located in the oil cavity 100. Moreover, the oil chamber 100 actually comprises two parts, namely a left oil chamber enclosed by the fixed cover 1 and the pump body 5, and a right oil chamber enclosed by the pump body 5, the connecting seat 3 and the housing 6, wherein the two oil chambers are communicated through two extending holes 52 on the pump body 5 and the mounting chamber 51.
The working principle of the hydraulic operating mechanism of the circuit breaker is as follows: the low-pressure oil in the oil tank enters the oil cavity 100 through the low-pressure oil inlet channel 61 and the filter 16, when the motor 7 runs, the motor output shaft 71 drives the eccentric shaft 9 to rotate, and the plungers 131 in the two plunger pairs 13 respectively reciprocate left and right under the rotation of the eccentric part of the eccentric shaft 9 and the action of the spring 132. When the plunger 131 extends out, low-pressure oil is sucked into the inner cavity of the plunger pair, and when the plunger 131 is pressed in, the low-pressure oil in the inner cavity of the plunger pair is pressed into high-pressure oil and is extruded out, and the high-pressure oil enters a high-pressure system of the operating mechanism body through the high-pressure oil path 59, the connecting sleeve 15 and the high-pressure oil discharge channel 62. In order to reduce friction between the plunger 131 and the eccentric shaft 9, a bushing 14 is mounted on the eccentric portion.
The oil cavity is formed by the fixed cover, the pump body, the sealing plug, the connecting seat and the shell instead of forming the oil cavity by the pump body, so that the structure of the pump body can be simplified, and the shell of the operating mechanism body is fully utilized, so that the structure is more compact. Meanwhile, the filter is also arranged in the shell and is not arranged in the pump body, so that the structure of the pump body can be simplified. In addition, the motor support is fixed on the pump body in a split mode and is not integrally machined, so that the structure of the pump body is simplified, machining difficulty can be reduced, and manufacturing cost is reduced. In addition, the plugging plug in sealing fit with the pump body can realize the plugging effect and only needs to be matched with the first bearing in an abutting mode, and the plugging plug is simple in structure and convenient to process and manufacture.
The two plunger pairs are arranged, so that the working pressure and the discharge capacity of the oil pump meet the requirements of a hydraulic operating mechanism, the diameter and the sectional area of each plunger are reduced, and the action force of high-pressure oil on the plungers and the load torque of the oil pump are reduced. The double plungers are adopted, and each plunger presses oil once per rotation of the motor, so that the discharge capacity of the high-pressure oil pump can be ensured; and the low-rotating-speed motor is also favorable for selection, and a gear reduction mechanism is cancelled. In order to meet the requirement on the safety protection level of equipment, a modularized and integrated design structure is adopted for the hydraulic operating mechanism, and a permanent magnet motor with a smaller overall dimension and a shell is selected.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the oil pump assembly may not include the motor support and the motor, and a user may purchase and install the oil pump assembly according to actual needs, or the motor support and the motor are manufactured separately and installed after arriving at a use site.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the oil pump assembly may not include a sealing plug, for example, one end of the installation cavity is directly closed, and the oil cavity is defined by the fixed cover, the pump body, the connecting seat and the housing, or when there is only one plunger pair without the fixed cover, the oil cavity is defined by the pump body, the connecting seat and the housing.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, only one bearing can be arranged to realize the rotary installation of the eccentric shaft.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the pump body may not be provided with an installation cavity, but like the prior art, the eccentric portion is directly located in the oil cavity, and at this time, an extending hole is not required to be provided.
In other embodiments of the hydraulic circuit breaker operating mechanism, the number of the plunger pairs can be three or more.
In other embodiments of the circuit breaker hydraulic actuator, the filter may be disposed in the pump body or not.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the housing may not be provided with a sinking groove, and the connecting seat is directly and fixedly connected with the housing through a screw.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, two ends of the connecting sleeve can also be respectively in threaded connection with the pump body and the shell.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, a connecting sleeve is not required to be arranged, and the outlet of the high-pressure oil path in the pump body is directly in butt joint communication with the high-pressure oil discharge channel in the shell.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A circuit breaker hydraulic pressure operating mechanism, characterized by includes:
the operating mechanism comprises an operating mechanism body, wherein the operating mechanism body comprises a shell, and a low-pressure oil inlet channel communicated with an oil tank and a high-pressure oil outlet channel communicated with a high-pressure system of the operating mechanism body are arranged in the shell;
oil pump assembly, with operating mechanism body fixed connection, oil pump assembly includes:
a pump body;
the eccentric shaft is rotatably arranged on the pump body and is provided with an eccentric part;
the plunger pair is fixed on the pump body and provided with an oil suction port, an oil discharge port and a plunger, and the plunger of the plunger pair is in pushing fit with the eccentric part so as to suck oil and discharge oil;
the high-pressure oil way is arranged in the pump body and is communicated with the oil discharge port of the plunger pair and the high-pressure oil discharge channel;
one end of the connecting seat is fixedly connected with the pump body, and the other end of the connecting seat is fixedly connected with the shell;
the hydraulic operating mechanism of the circuit breaker further comprises an oil cavity communicated with the low-pressure oil inlet channel, the oil cavity is at least defined by the pump body, the connecting seat and the shell, and an oil inlet of the plunger pair is located in the oil cavity.
2. The hydraulic operating mechanism for circuit breaker of claim 1 wherein the oil pump assembly further comprises a connecting sleeve having one end in communication with the high pressure oil path on the pump body and the other end in communication with the high pressure oil drain passage on the housing.
3. The hydraulic operating mechanism for the circuit breaker according to claim 2, wherein the connecting sleeve is inserted and fixed between the pump body and the casing, a first insertion hole for inserting one end of the connecting sleeve is formed in an outlet of the high-pressure oil path on the pump body, the aperture of the first insertion hole is larger than that of the high-pressure oil path, a second insertion hole for inserting the other end of the connecting sleeve is formed in an inlet of the high-pressure oil drainage channel on the casing, and the aperture of the second insertion hole is larger than that of the high-pressure oil drainage channel.
4. The hydraulic operating mechanism of the circuit breaker according to any one of claims 1 to 3, wherein the housing is provided with a sinking groove for sinking an end of the connecting base, the connecting base is provided with a flange in stop fit with an end face of the housing, and the flange is fixedly connected to the housing by a screw.
5. The hydraulic operating mechanism of the circuit breaker according to any one of claims 1 to 3, wherein a filter communicated with the low-pressure oil inlet passage is provided in the housing.
6. The hydraulic operating mechanism for the circuit breaker according to any one of claims 1 to 3, wherein at least two plunger pairs are provided, each plunger pair is uniformly arranged around the rotation axis of the eccentric shaft in a circumferential manner, the oil pump assembly further comprises a fixed cover fixedly connected with the pump body, one plunger pair is arranged in an inner cavity of the fixed cover, and the oil cavity is defined by the fixed cover, the pump body, the connecting seat and the shell.
7. The hydraulic operating mechanism for the circuit breaker according to any one of claims 1 to 3, wherein a mounting cavity for rotatably mounting the eccentric shaft is provided in the pump body, the eccentric portion is located in the mounting cavity, and an insertion hole for inserting the plunger of the plunger pair is further provided in the pump body and is communicated with the mounting cavity.
8. The hydraulic actuator of claim 7, wherein a first bearing rotatably engaged with an end portion of the eccentric shaft and a second bearing rotatably engaged with a middle portion of the eccentric shaft are installed in the installation chamber, and the first bearing and the second bearing are respectively located at both sides of the eccentric portion.
9. The hydraulic operating mechanism for circuit breaker of claim 8 wherein the oil pump assembly further comprises a plug fixedly connected to the pump body for plugging the end of the mounting cavity, and wherein the end of the first bearing abuts against the plug.
10. The hydraulic operating mechanism of the circuit breaker according to any one of claims 1-3, wherein the oil pump assembly further comprises a motor support and a motor mounted on the motor support, and the motor support is fixed on the pump body through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467605.3A CN112700982B (en) | 2020-12-14 | 2020-12-14 | Hydraulic operating mechanism of circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467605.3A CN112700982B (en) | 2020-12-14 | 2020-12-14 | Hydraulic operating mechanism of circuit breaker |
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| CN112700982A true CN112700982A (en) | 2021-04-23 |
| CN112700982B CN112700982B (en) | 2024-04-16 |
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| CN202011467605.3A Active CN112700982B (en) | 2020-12-14 | 2020-12-14 | Hydraulic operating mechanism of circuit breaker |
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| CN105422410A (en) * | 2015-12-03 | 2016-03-23 | 河南平高电气股份有限公司 | Hydraulic operation mechanism and motor oil pump unit thereof |
| CN208831162U (en) * | 2018-09-12 | 2019-05-07 | 贵州鑫瑞达科技有限公司 | A kind of novel symmetrical twin-tub pressure pump |
| CN208858504U (en) * | 2018-10-25 | 2019-05-14 | 温州市基安机械有限公司 | A kind of integrated plunger pump of decelerating through motor |
| CN111207052A (en) * | 2019-12-31 | 2020-05-29 | 平高集团有限公司 | Oil pump assembly |
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| CN201369248Y (en) * | 2008-11-25 | 2009-12-23 | 河南平高电气股份有限公司 | Hydraulic operating mechanism for high-voltage AC circuit breaker |
| CN102700603A (en) * | 2012-05-31 | 2012-10-03 | 陕西秦川机械发展股份有限公司 | Emergency two-circuit power steering system |
| CN103089507A (en) * | 2013-01-09 | 2013-05-08 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Double-row six-cylinder radial type common-rail oil feed pump |
| CN105422410A (en) * | 2015-12-03 | 2016-03-23 | 河南平高电气股份有限公司 | Hydraulic operation mechanism and motor oil pump unit thereof |
| CN208831162U (en) * | 2018-09-12 | 2019-05-07 | 贵州鑫瑞达科技有限公司 | A kind of novel symmetrical twin-tub pressure pump |
| CN208858504U (en) * | 2018-10-25 | 2019-05-14 | 温州市基安机械有限公司 | A kind of integrated plunger pump of decelerating through motor |
| CN111207052A (en) * | 2019-12-31 | 2020-05-29 | 平高集团有限公司 | Oil pump assembly |
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| CN112700982B (en) | 2024-04-16 |
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