CN112700982B - Hydraulic operating mechanism of circuit breaker - Google Patents
Hydraulic operating mechanism of circuit breaker Download PDFInfo
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- CN112700982B CN112700982B CN202011467605.3A CN202011467605A CN112700982B CN 112700982 B CN112700982 B CN 112700982B CN 202011467605 A CN202011467605 A CN 202011467605A CN 112700982 B CN112700982 B CN 112700982B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 59
- 238000009434 installation Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 2
- 239000003921 oil Substances 0.000 description 132
- 238000007789 sealing Methods 0.000 description 16
- 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
- 238000004891 communication Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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
Abstract
The invention provides a hydraulic operating mechanism of a circuit breaker, comprising: the operating mechanism body comprises a shell, and a low-pressure oil inlet channel and a high-pressure oil discharge channel are arranged in the shell; the oil pump subassembly, with operating mechanism body fixed connection, the oil pump subassembly 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 an oil drain port of the plunger pair and the high-pressure oil drain 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 formed by the pump body, the connecting seat and the shell in a surrounding mode, and an oil inlet of the plunger pair is located in the oil cavity. The oil cavity 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 by maintaining high pressure and performing instantaneous action, wherein 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, trace leakage exists in the hydraulic system during normal operation, the pressure can be reduced, and the oil pump needs to be started to supplement the pressure.
An oil pump assembly disclosed in chinese patent application publication No. CN111207052a, for example, includes a pump body, the pump body is formed by a support and a pump cover that are connected separately, the support and the pump cover surround to form an oil chamber, eccentric shafts are rotatably mounted on the support and the pump cover, and eccentric portions of the eccentric shafts are located in the oil chamber. Two plunger pairs are arranged in the oil cavity, the plunger pairs are fixedly arranged on the support, and plungers of the plunger pairs are matched with eccentric parts of the eccentric shafts and used for oil absorption and oil discharge.
The structure of the pump body is complex, the support of the pump body and the pump cover are required to be enclosed into an oil cavity, namely the oil cavity is formed by the pump body, in addition, the support is required to rotate and install the eccentric shaft, is required to integrally arrange the motor mounting seat and the filter mounting structure, so that the structure of the support is complex, the processing difficulty is relatively high, and the manufacturing cost is high. In addition, the pump cover is required to rotate and install the eccentric shaft and enclose 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 in the prior art, the pump body structure is complex because an oil cavity is formed by the pump body.
In order to achieve the above purpose, the hydraulic operating mechanism of the circuit breaker adopts the following technical scheme:
a circuit breaker hydraulic operating mechanism comprising:
the operating mechanism body comprises a shell, and a low-pressure oil inlet channel communicated with the oil tank and a high-pressure oil discharge channel communicated with a high-pressure system of the operating mechanism body are arranged in the shell;
the oil pump subassembly, with operating mechanism body fixed connection, the oil pump subassembly 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 is 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 an oil drain port of the plunger pair and the high-pressure oil drain 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 formed by the pump body, the connecting seat and the shell in a surrounding mode, and an oil inlet of the plunger pair is located in the oil cavity.
The beneficial effects of the technical scheme are that: the invention provides a hydraulic operating mechanism of a circuit breaker, wherein an oil pump assembly and an operating mechanism body are directly and fixedly connected together, and a low-pressure oil inlet channel communicated with an oil tank and a high-pressure oil discharge channel communicated with a high-pressure system of the operating mechanism body are arranged in a shell of the operating mechanism body for facilitating oil inlet and oil discharge; the oil pump assembly comprises a pump body, a plunger pair and a connecting seat, wherein an eccentric shaft arranged on the pump body is matched with the plunger pair to realize oil absorption and oil discharge of the plunger pair, a high-pressure oil way arranged in the pump body is convenient for high-pressure oil liquid to enter a high-pressure oil discharge channel, one end of the connecting seat is fixedly connected with the pump body, the other end of the connecting seat is fixedly connected with the shell, an oil cavity is at least formed by the connecting seat, the pump body and the shell in a surrounding mode, and the oil cavity is formed by the connecting seat, the pump body and the shell instead of the pump body.
Further, in order to facilitate the communication between the high-pressure oil way 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 way on the pump body, and the other end of the connecting sleeve is communicated with the high-pressure oil discharge channel on the shell.
Further, in order to facilitate installation of the connecting sleeve, the connecting sleeve is fixed between the pump body and the shell in a plug-in manner, a first jack for inserting one end of the connecting sleeve is arranged at the outlet of the high-pressure oil way on the pump body, the aperture of the first jack is larger than that of the high-pressure oil way, a second jack for inserting the other end of the connecting sleeve is arranged at the inlet of the high-pressure oil drainage channel on the shell, and the aperture of the second jack is larger than that of the high-pressure oil drainage channel.
Further, in order to facilitate the fixed connection between the connecting seat and the shell, a sinking groove for sinking the end part of the connecting seat is arranged on the shell, a flange matched with the end surface of the shell in a blocking way is arranged on the connecting seat, and the flange is fixedly connected on the shell through a screw.
Further, in order to facilitate filtering of 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.
Further, in order to ensure that the working pressure and the displacement of the oil pump meet the requirements of the hydraulic operating mechanism, the diameter and the sectional area of each plunger are reduced, 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 circumferentially around the rotation 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 formed by the fixed cover, the pump body, the connecting seat and the shell in a surrounding mode.
Further, in order to facilitate the installation of the eccentric shaft and the matching of the plunger pair and the eccentric part, an installation cavity for rotationally installing the eccentric shaft is arranged in the pump body, the eccentric part is positioned in the installation cavity, and an extension hole communicated with the installation cavity and used for extending the plunger of the plunger pair is also formed in the pump body.
Further, in order to ensure that the eccentric shaft rotates stably, 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 installed in the installation cavity, and the first bearing and the second bearing are respectively positioned at two sides of the eccentric part.
Further, in order to facilitate the installation of the first bearing, the oil pump assembly further comprises a blocking plug fixedly connected with the pump body to block the end part of the installation cavity, and the end part of the first bearing abuts against the blocking plug.
Further, in order to facilitate driving the eccentric shaft to rotate, the installation of the motor is facilitated, the structure of the pump body is simplified, the oil pump assembly further comprises a motor support and a motor installed on the motor support, and the motor support is fixed on the pump body through screws.
Drawings
FIG. 1 is a partial block diagram of embodiment 1 of a hydraulic operating mechanism for a circuit breaker in accordance with the present invention;
FIG. 2 is a top plan view of the two pairs of plungers and eccentric shafts of FIG. 1;
FIG. 3 is a perspective view of the pump body of FIG. 1;
FIG. 4 is a partial block diagram of embodiment 2 of the hydraulic operating mechanism of the circuit breaker of the present invention;
fig. 5 is a partial plan view of embodiment 3 of the hydraulic operating mechanism of the circuit breaker of the present invention.
In the figure: 100-oil chamber; 1-a fixed cover; 2-plugging; 3-connecting seats; 4-a motor support; 5' -pump body; 5-a pump body; 51-a mounting cavity; 52-extending the hole; 53-first connection holes; 54-a high-pressure oil way inlet; 55-a first jack; 56-a second connection hole; 57-a seal ring mounting groove; 58-a third connecting hole; 59-a high-pressure oil path; 6-a housing; 61-a low pressure oil inlet passage; 62-high pressure oil drain channel; 7-a motor; 71-a motor output shaft; 8-a rotation stopping sleeve; 9-an eccentric shaft; 10-a second bearing; 11-rotating shaft seal; 12-a first bearing; 13-a plunger pair; 131-a plunger; 132-a spring; 133-an oil suction port; 134-an oil drain port; 14-shaft sleeve; 15-connecting sleeves; 16-a filter; 17-a first sealing ring; 18-a second sealing ring; 19-a third sealing ring; 20-fourth sealing rings; 21-a fifth sealing ring; 22-sixth sealing ring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the 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 invention, as 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 made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Embodiment 1 of the hydraulic operating mechanism of the circuit breaker of the present invention is shown in fig. 1, and includes an operating mechanism body and an oil pump assembly, wherein the operating mechanism body includes a housing 6, and a low-pressure oil inlet passage 61 for communicating with an oil tank (not shown) and a high-pressure oil discharge passage 62 for communicating with a high-pressure system (not shown) of the operating mechanism body are provided in the housing 6. A filter 16 communicating with the low-pressure oil feed passage 61 is also provided in the housing 6.
The oil pump assembly is directly 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, a mounting cavity 51 for rotatably mounting the eccentric shaft 9 is formed in the pump body 5, the mounting cavity 51 is vertically communicated, and an eccentric part on the eccentric shaft 9 is positioned in the mounting cavity 51, as shown in the combination of fig. 3. As shown in fig. 1, the first bearing 12 which is in running fit with the lower end of the eccentric shaft 9 is installed in the installation cavity 51, and the lower end cavity opening of the installation cavity 51 facilitates the installation of the first bearing 12. The oil pump assembly further comprises a blocking plug 2 fixedly connected with the pump body 5 to block the lower end of the installation cavity 51, and the end part of the first bearing 12 is propped against the blocking plug 2 to position the first bearing 12. In addition, a third sealing ring 19 is provided between the closure plug 2 and the pump body 5 in order to ensure tightness. For convenience of connection, as shown in fig. 3, a third connection hole 58 for fixedly connecting the closure plug 2 is provided in the pump body 5.
The second bearing 10 which is in running fit with the middle part of the eccentric shaft 9 is also arranged in the mounting cavity 51, the second bearing 10 and the first bearing 12 are respectively positioned on the upper side and the lower side of the eccentric part, the second bearing 10 is positioned at an upper end cavity opening of the mounting cavity 51, in order to ensure tightness, a rotary shaft seal 11 is arranged between the eccentric shaft 9 and the mounting cavity 51, and the rotary shaft seal 11 is positioned on the inner side of the 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 a key, and the rotation stopping sleeve 8 is positioned in the motor support 4.
The oil pump assembly further includes two plunger pairs 13, and as shown in connection with fig. 2, the plunger pairs 13 have 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, first connecting holes 53 for fixedly connecting the plunger pairs 13 are provided on the pump body 5. As shown in fig. 1, a high-pressure oil path 59 is provided in the pump body 5, the inlet 54 of the high-pressure oil path is communicated with the oil discharge port 134 of the plunger pair 13, and the outlet of the high-pressure oil path 59 is communicated with the high-pressure oil discharge channel 62. The plunger 131 of the plunger pair 13 is in pushing fit with the eccentric portion to perform oil suction and oil discharge, and for convenience of fit, as shown in fig. 3, an insertion hole 52 for inserting the plunger 131 of the plunger pair 13 is further provided in the pump body 5 in communication with the installation cavity 51.
As shown in fig. 3, the middle part of the pump body 5 is in a square structure, the left and right sides of the pump body are provided with bump structures, the first connecting hole 53 and the high-pressure oil inlet 54 are all arranged on the bump structures, and the installation cavity 51 is arranged on the square structure. As shown in fig. 1, the oil pump assembly further includes a connection seat 3 having one end fixedly connected with the pump body 5 and the other end fixedly connected with the housing 6, the connection seat 3 is integrally cylindrical, and the left end of the connection seat 3 is fixed on the right side surface of the square block structure by a screw, so that the right side surface of the square block structure is provided with a second connection hole 56. In order to ensure tightness, a first sealing ring 17 is provided between the connection seat 3 and the pump body 5, and thus a sealing ring mounting groove 57 is provided on the pump body 5.
As shown in fig. 1, a sinking groove into which the right end of the connection seat 3 is sunk is formed in the housing 6, and a fourth seal ring 20 is provided between the connection seat 3 and the wall of the sinking groove to ensure tightness. The connection base 3 is provided with a flange which is in stop fit with the end face of the housing 6, and the flange is fixedly connected to the housing 6 by a screw.
The oil pump assembly further comprises a connecting sleeve 15, one end of the connecting sleeve 15 is communicated with the high-pressure oil way 59 on the pump body 5, and the other end of the connecting sleeve 15 is communicated with the high-pressure oil discharge channel 62 on the shell 6, and for convenient installation, the connecting sleeve 15 is fixedly inserted between the pump body 5 and the shell 6, so that after the connecting seat 3 is fixedly connected with the shell 6, the connecting sleeve 15 can be clamped and fixed. Specifically, a first jack 55 (as shown in fig. 3) into which the left end of the connecting sleeve 15 is inserted is disposed at the outlet of the high-pressure oil path 59 on the pump body 5, the aperture of the first jack 55 is larger than the aperture of the high-pressure oil path 59, a second jack into which the right end of the connecting sleeve 15 is inserted is disposed at the inlet of the high-pressure oil discharge channel 62 on the housing 6, and the aperture of the second jack is larger than the aperture of the high-pressure oil discharge channel 62. In order to ensure tightness, 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 housing 6.
As shown in fig. 1, the oil pump assembly further includes a fixed cover 1 fixedly connected to the pump body 5, the fixed cover 1 is cup-shaped, the right end of the fixed cover 1 is fixed on the left side surface of the square structure by a screw, in order to ensure tightness, a second sealing ring 18 is disposed between the fixed cover 1 and the pump body 5, and correspondingly, a sealing ring mounting groove 57 is disposed on the pump body 5, that is, the structure of the pump body 5 is basically bilateral symmetry, only the first insertion hole 55 needs to be disposed for mounting the connecting sleeve 15, so that a part of the bump structure on the right side is more.
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, and the fixed cover 1, the pump body 5, the sealing 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. The oil chamber 100 actually includes two parts, namely a left oil chamber surrounded by the fixed cover 1 and the pump body 5, a right oil chamber surrounded by the pump body 5, the connecting seat 3 and the housing 6, and the two side oil chambers are communicated with the mounting chamber 51 through two extending holes 52 in the pump body 5.
The working principle of the hydraulic operating mechanism of the circuit breaker is as follows: the low pressure oil of 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 do left and right reciprocating motions respectively under the rotation of the eccentric part of the eccentric shaft 9 and the action of the spring 132. When the plunger 131 extends, the plunger auxiliary inner cavity sucks low-pressure oil, and when the plunger 131 is pressed in, the low-pressure oil in the plunger auxiliary inner cavity is pressed into high-pressure oil and is pressed out, and the high-pressure oil enters a high-pressure system of the operating mechanism body through the high-pressure oil way 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 in a surrounding mode instead of forming the oil cavity by the pump body, so that the structure of the pump body can be simplified, the shell of the operating mechanism body is fully utilized, and 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 pump body structure can be simplified. In addition, the motor support is fixed on the pump body in a split mode, and is not integrally machined and formed, so that the pump body structure is simplified, the machining difficulty can be reduced, and the manufacturing cost is reduced. In addition, the plugging plug in sealing fit with the pump body only needs to be in abutting fit with the first bearing except for realizing the plugging effect, and the plugging plug has a simple structure and is convenient to process and manufacture.
The two plunger pairs are arranged in the hydraulic oil pump, so that the working pressure and the displacement of the oil pump meet the requirements of a hydraulic operating mechanism, and meanwhile, the diameter and the sectional area of each plunger are reduced, and the acting 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 every time when the motor rotates for one circle, so that the displacement of the high-pressure oil pump can be ensured; the low-rotation-speed motor is also favorable for selecting and using, and a gear reduction mechanism is eliminated. In order to facilitate the adoption of a modularized and integrated design structure for the hydraulic operating mechanism, a permanent magnet motor with a small outline dimension and a shell is selected to meet the requirements on the safety protection level of equipment.
As shown in fig. 4, embodiment 2 of the hydraulic operating mechanism of the circuit breaker according to the present invention is different from embodiment 1 in that only one plunger pair 13 is provided in this embodiment, and a fixed cover is omitted, so that the left side of the pump body 5' is directly closed.
As shown in fig. 5, embodiment 3 of the hydraulic operating mechanism of the circuit breaker according to the present invention differs from embodiment 1 in that four plunger pairs 13 are provided in this embodiment, and the eccentric shaft 9 is fitted with the four plunger pairs 13.
In other embodiments of the hydraulic circuit breaker operating mechanism, the oil pump assembly may not include a motor support and a motor, and a user may purchase and install the oil pump assembly according to actual needs, or the motor support and the motor may be manufactured separately and installed after reaching the use site.
In other embodiments of the hydraulic circuit breaker operating mechanism, the oil pump assembly may not include a plug, such as where one end of the mounting cavity is directly closed, where the oil cavity is enclosed by the fixed cover, the pump body, the connecting seat, and the housing together, or where there is only one plunger pair without the fixed cover, the oil cavity is enclosed by the pump body, the connecting seat, and the housing together.
In other embodiments of the hydraulic breaker operating mechanism, only one bearing may be provided to effect rotational mounting 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 the eccentric portion is directly located in the oil cavity as in the prior art, and no extending hole is required.
In other embodiments of the hydraulic breaker operating mechanism, the number of plunger pairs may be three or more.
In other embodiments of the hydraulic breaker operating mechanism, the filter may or may not be disposed within the pump body.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the housing may not be provided with a sink, and the connection base is directly fixedly connected with the housing through a screw.
In other embodiments of the hydraulic breaker operating mechanism, two ends of the connecting sleeve may be respectively connected with the pump body and the housing in a threaded manner.
In other embodiments of the hydraulic operating mechanism of the circuit breaker, the connecting sleeve is not required, and the high-pressure oil path outlet 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 the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A hydraulic operating mechanism for a circuit breaker, comprising:
the operating mechanism body comprises a shell, and a low-pressure oil inlet channel communicated with the oil tank and a high-pressure oil discharge channel communicated with a high-pressure system of the operating mechanism body are arranged in the shell;
the oil pump subassembly, with operating mechanism body fixed connection, the oil pump subassembly 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 is 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 an oil drain port of the plunger pair and the high-pressure oil drain 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, wherein the oil cavity is at least formed by the pump body, the connecting seat and the shell in a surrounding mode, and an oil inlet of the plunger pair is positioned in the oil cavity;
the oil pump assembly also comprises a connecting sleeve, one end of which is communicated with the high-pressure oil channel on the pump body, and the other end of which is communicated with the high-pressure oil discharge channel on the shell;
the connecting sleeve is fixed between the pump body and the shell in a plug-in manner, a first jack for inserting one end of the connecting sleeve is arranged at the outlet of the high-pressure oil path on the pump body, the aperture of the first jack is larger than that of the high-pressure oil path, a second jack for inserting the other end of the connecting sleeve is arranged at the inlet of the high-pressure oil discharging channel on the shell, and the aperture of the second jack is larger than that of the high-pressure oil discharging channel.
2. The hydraulic operating mechanism of the circuit breaker according to claim 1, wherein a sinking groove for sinking the end of the connecting seat is arranged on the shell, a flange matched with the end face of the shell in a blocking way is arranged on the connecting seat, and the flange is fixedly connected on the shell through a screw.
3. The hydraulic operating mechanism of the circuit breaker according to claim 1, wherein a filter communicating with the low pressure oil feed passage is provided in the housing.
4. The hydraulic operating mechanism of the circuit breaker according to claim 1, wherein at least two plunger pairs are arranged, each plunger pair is uniformly distributed around the rotation axis of the eccentric shaft in a circumference 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 jointly defined by the fixed cover, the pump body, the connecting seat and the shell.
5. The hydraulic operating mechanism of the circuit breaker according to claim 1, wherein a mounting chamber for rotatably mounting the eccentric shaft is provided in the pump body, the eccentric portion is located in the mounting chamber, and an insertion hole for inserting the plunger of the plunger pair is further provided in the pump body, which is communicated with the mounting chamber.
6. The hydraulic operating mechanism of the circuit breaker according to claim 5, wherein a first bearing rotatably fitted to an end portion of the eccentric shaft and a second bearing rotatably fitted to a middle portion of the eccentric shaft are installed in the installation chamber, the first bearing and the second bearing being located at both sides of the eccentric portion, respectively.
7. The hydraulic circuit breaker operating mechanism of claim 6, wherein the oil pump assembly further comprises a plug fixedly connected to the pump body to plug the end of the mounting cavity, the end of the first bearing abutting the plug.
8. The hydraulic circuit breaker operating mechanism of claim 1, wherein the oil pump assembly further comprises a motor mount and a motor mounted on the motor mount, the motor mount being secured to the pump body by 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467605.3A CN112700982B (en) | 2020-12-14 | 2020-12-14 | Hydraulic operating mechanism of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112700982A CN112700982A (en) | 2021-04-23 |
| CN112700982B true CN112700982B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| CN2653673Y (en) * | 2003-09-22 | 2004-11-03 | 河南平高电气股份有限公司 | Operation mechanism of high voltage breaker |
| CN1808650A (en) * | 2006-01-25 | 2006-07-26 | 西安西开高压电气股份有限公司 | High power hydraulic actuating mechanism |
| CN2802695Y (en) * | 2005-05-28 | 2006-08-02 | 温州益坤电气有限公司 | Hydraulic spring operation mechanism |
| CN101127279A (en) * | 2007-07-20 | 2008-02-20 | 西安电力机械制造公司 | Multi-pole piston jar pump combination device for hydraulic pressure operation machine of high voltage breaker |
| CN101393816A (en) * | 2008-10-31 | 2009-03-25 | 沈阳东华工大高压电器设备有限公司 | Electromagnetic hydraulic valve type spring hydraulic operating mechanism having self-defense capability |
| 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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2020
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| CN2653673Y (en) * | 2003-09-22 | 2004-11-03 | 河南平高电气股份有限公司 | Operation mechanism of high voltage breaker |
| CN2802695Y (en) * | 2005-05-28 | 2006-08-02 | 温州益坤电气有限公司 | Hydraulic spring operation mechanism |
| CN1808650A (en) * | 2006-01-25 | 2006-07-26 | 西安西开高压电气股份有限公司 | High power hydraulic actuating mechanism |
| CN101127279A (en) * | 2007-07-20 | 2008-02-20 | 西安电力机械制造公司 | Multi-pole piston jar pump combination device for hydraulic pressure operation machine of high voltage breaker |
| CN101393816A (en) * | 2008-10-31 | 2009-03-25 | 沈阳东华工大高压电器设备有限公司 | Electromagnetic hydraulic valve type spring hydraulic operating mechanism having self-defense capability |
| 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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|---|---|
| CN112700982A (en) | 2021-04-23 |
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