Sealing device for speed reducer of oil pumping unit

Abstract

The utility model discloses a pumping unit speed reducer sealing device which comprises a sealing device body installed on the outer side of a pumping unit speed reducer and arranged on an output shaft of the speed reducer in a sleeved mode, the sealing device body comprises an annular base fixed to the right side of the pumping unit speed reducer in a sealing thread mode, and the right side of the annular base is fixedly connected with an external thread sleeve. According to the utility model, a series of structures are arranged, so that the flexible sealing filler is conveniently subjected to accurate pressure control, extrusion and adjustment for stable wrapping, attaching and sealing work, the phenomenon that the friction force is too large due to too large pressure or effective sealing cannot be realized due to relatively small pressure is prevented, the sealing effect is improved, and the flexible sealing filler is conveniently replaced; the outer side of the speed reducer output shaft can be brushed and cleaned automatically when the speed reducer output shaft rotates, the cleanliness of the connecting position is improved, personnel can be reminded to conduct adjustment in time when the extruding force is reduced due to the fact that the flexible sealing filler becomes thin due to aging and other factors, the personnel can know the adjustment work in time, and the using effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducer sealing, in particular to a sealing device for a pumping unit reducer. Background Art

[0002] Currently, the most commonly used equipment in the field of oil extraction is the oil pump. The lubricating oil required by the reducer in the oil pump always leaks from the output shaft end, seriously polluting the environment. When the leakage is large, it will cause the reducer to lack oil, accelerate gear wear, and affect the service life.

[0003] In this regard, after searching, publication number CN216519514U discloses a split sealing device for the output shaft of an oil pump reducer, in which the reducer and the split sealing seat are connected by bolts A, the sealing gland and the split sealing seat are connected by threads, and the gap between the split sealing seat and the output shaft of the reducer is filled with sealing filler and a sealing block; when the reducer is running, the output shaft of the reducer rotates at a high speed, and the sealing gland tightly compacts the sealing material, the output shaft of the reducer and the split sealing seat through the sealing block, so that the lubricating oil in the reducer will not seep out through the output shaft of the reducer, thereby achieving the purpose of sealing and protecting the well site environment.

[0004] The above technology discloses a split sealing device for the output shaft of an oil pump reducer. The split sealing seat and sealing filler are arranged to achieve sealing on the outer side of the extended part of the output shaft of the reducer. The sealing filler is compressed by a sealing cover, a sealing block and other structures to shrink it and perform a tight and fitting sealing operation. However, the following deficiencies still exist during use: 1. It is impossible to monitor the squeezing force in real time when the sealing filler is squeezed, and it is impossible to remind personnel to make adjustments in time when the squeezing force is reduced due to factors such as aging. When the sealing filler is aged and cannot be tightly sealed, it is inconvenient for personnel to know in time and make adjustments, and the use effect is not ideal. 2. When in use, the outer side of the reducer output shaft cannot be automatically cleaned. When there is a lot of dust and impurities on the outer side that are attached and condensed, there is a phenomenon of jamming into the sealing position, and the cleanliness of the connection is not ideal. Improvement is needed. In view of this, the present application proposes a sealing device for an oil pump reducer. Utility Model Content

[0005] The purpose of the utility model is to provide a sealing device for a pumping unit reducer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing device for a pumping unit reducer, comprising a sealing device body installed on the outside of the pumping unit reducer and sleeved on the reducer output shaft, the sealing device body comprising an annular seat with a sealing thread fixed on the right side of the pumping unit reducer, an external thread sleeve fixedly connected to the right side of the annular seat, a flexible sealing packing is provided in a movable sleeve inside the external thread sleeve, the flexible sealing packing is movably sleeved on the reducer output shaft, and the flexible sealing packing is movably wrapped and sealed on the outside of the reducer output shaft by the flexible sealing packing to prevent the oil in the pumping unit reducer from leaking outward in large quantities from the outside of the reducer output shaft;

[0007] A PLC controller is fixedly connected to the top of the right side of the annular seat, and a sound and light alarm is fixed and electrically connected to the top of the PLC controller. A threaded sleeve on the external threaded sleeve is provided with a rotational cleaning component that is movably sleeved on the outside of the output shaft of the reducer. A circular ring is rotatably installed on the right inner wall of the rotational cleaning component. A pressure measuring spring assembly that is movably in contact with the right side of the flexible sealing filler is installed on the left side of the circular ring. The pressure measuring spring assembly is electrically connected to the PLC controller. The rotational cleaning assembly is used to drive the circular ring to move left and right and to clean the outside of the reducer output shaft when the reducer output shaft rotates to prevent impurities from adhering and condensing. The pressure measuring spring assembly is used to elastically squeeze the flexible sealing filler and detect the squeezing force when the circular ring moves to the left, and the squeezing force is transmitted to the PLC controller for display, and the flexible sealing filler is squeezed to shrink it to adjust the degree of wrapping sealing, and the PLC controller is used to control the sound and light alarm to open for alarm reminder when the squeezing force is reduced due to aging of the flexible sealing filler in the future.

[0008] Preferably, the rotational cleaning assembly includes an internal threaded cover threadedly mounted on an external threaded sleeve, the right side of the internal threaded cover is arranged as a sealing structure and is fixedly connected to a ring-shaped brush, the internal threaded cover and the ring-shaped brush are both movably mounted on the output shaft of the reducer, the top, bottom, front side and rear side of the internal threaded cover are fixedly connected to a handle rod, and the circular ring is rotatably mounted on the right inner wall of the internal threaded cover.

[0009] Preferably, the pressure measuring spring assembly includes a pressure ring arranged on the left side of the circular ring, and the left top and left bottom of the circular ring are both provided with sliding grooves, and a sliding sleeve is provided in the sliding groove. A compression spring in a compressed state is fixedly connected between the right side of the slider and the corresponding right inner wall of the sliding groove, and a pressure sensor is fixedly connected between the left side of the slider and the right side of the pressure ring. Both pressure sensors are electrically connected to the PLC controller, and the left side of the pressure ring is in active contact with the right side of the flexible sealing filler.

[0010] Preferably, the output shaft of the reducer is located inside the annular seat, the circular ring and the pressure ring and does not contact the inner sides of the three.

[0011] Preferably, a movable through hole is opened on the right side of the internal thread cover, and the output shaft of the reducer is located in the movable through hole and does not contact the inner side of the movable through hole.

[0012] Preferably, a bearing is fixedly connected to the right inner wall of the internal thread cover, and the inner ring of the bearing is fixedly fitted to the outer side of the ring.

[0013] Preferably, a sealing ring is bonded and fixed to the left side of the annular seat, and the left side of the sealing ring is in movably contact with the right side of the oil pumping unit reducer. The right side of the oil pumping unit reducer is provided with four threaded grooves in a circular shape at equal intervals, and a fixing bolt is threadedly sleeved in the threaded groove. The left side of the annular seat and the left side of the sealing ring are both provided with four bolt through holes in a circular shape, and the fixing bolt is movably sleeved in the corresponding two bolt through holes.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The pumping unit reducer sealing device can elastically tighten and squeeze the flexible sealing filler by means of rotation adjustment through the cooperation of the annular seat, external thread sleeve, flexible sealing filler, PLC controller, pressure ring, rotational cleaning component and pressure measuring spring tension component, and can detect and display the squeezing force during tightening and squeezing. By displaying the squeezing force, it is convenient for personnel to accurately control the squeezing force, and achieve the effect of accurate pressure control, squeezing and adjusting the flexible sealing filler. By means of accurate pressure control and adjustment, the outer side of the reducer output shaft can be stably wrapped and sealed to prevent the phenomenon of excessive friction due to excessive pressure or ineffective sealing due to low pressure, thereby improving the sealing effect and facilitating the subsequent disassembly, assembly and replacement of the flexible sealing filler;

[0016] 2. The pumping unit reducer sealing device can remind personnel to make adjustments in time when the squeezing force is reduced due to the thinning of the flexible sealing packing due to aging and other factors, through the PLC controller, pressure measuring spring assembly and sound and light alarm, so that personnel can know in time to make adjustments and improve the use effect;

[0017] 3. The reducer sealing device of the oil pumping unit can automatically brush and clean the outer side of the reducer output shaft when it rotates through the rotary cleaning component, thereby reducing the phenomenon of dust and impurities on the outer side being stuck and condensed into the sealing position, thereby improving the cleanliness of the connection.

[0018] The utility model is provided with a series of structures, which is convenient for accurately controlling the pressure, squeezing and adjusting the flexible sealing filler to perform stable wrapping and fitting sealing work, and prevents the phenomenon that the friction force is too large due to excessive pressure or the pressure is too small to effectively seal, improves the sealing effect, and is convenient for replacing the flexible sealing filler. It is convenient to automatically brush and clean the outer side of the reducer output shaft when the reducer output shaft rotates, thereby improving the cleanliness of the connection. It is also convenient to promptly remind personnel to make adjustments when the squeezing force is reduced due to the thinning of the flexible sealing filler due to aging and other factors, so that personnel can be informed in time to make adjustments, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the oil pump reducer sealing device proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of the pumping unit reducer sealing device proposed by the utility model;

[0021] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A;

[0022] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of the connecting piece of the ring and the pressure measuring spring assembly of the oil pumping unit reducer sealing device.

[0023] In the figure: 1. Pumping unit reducer; 101. Reducer output shaft; 2. Annular seat; 3. External thread sleeve; 4. Flexible sealing packing; 5. PLC controller; 6. Sound and light alarm; 7. Internal thread cover; 8. Annular brush; 9. Ring; 10. Slide groove; 11. Sliding block; 12. Compression spring; 13. Pressure sensor; 14. Pressure ring; 15. Bearing; 16. Handle bar. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 4 As shown, the sealing device of the oil pumping unit reducer proposed in this embodiment includes a sealing device body installed on the outside of the oil pumping unit reducer 1 and sleeved on the reducer output shaft 101, the sealing device body includes an annular seat 2 with a sealing thread fixed on the right side of the oil pumping unit reducer 1, a sealing ring is bonded and fixed on the left side of the annular seat 2, and the left side of the sealing ring is in active contact with the right side of the oil pumping unit reducer 1, wherein the right side of the oil pumping unit reducer 1 is provided with four thread grooves in an annular shape with equal intervals, and a fixing bolt is provided with a thread sleeve in the thread groove, and four bolt through holes are provided in an annular shape on the left side of the annular seat 2 and the left side of the sealing ring, and the fixing bolt is movably sleeved in two corresponding bolt through holes, and the right side of the annular seat 2 is fixedly connected with an external thread sleeve 3, and a flexible sealing packing 4 is movably sleeved in the external thread sleeve 3, and the flexible sealing packing 4 is movably sleeved on the reducer output shaft 101, and the flexible sealing packing 4 is used to movably wrap and seal the outer side of the reducer output shaft 101 to prevent the oil in the oil pumping unit reducer 1 from leaking outward from the outer side of the reducer output shaft 101 in large quantities;

[0026] A PLC controller 5 is fixedly connected to the top of the right side of the annular seat 2, and a sound and light alarm 6 is fixed and electrically connected to the top of the PLC controller 5. A threaded sleeve on the external threaded sleeve 3 is provided with a rotational cleaning component that is movably sleeved on the outside of the reducer output shaft 101. A circular ring 9 is rotatably installed on the right inner wall of the rotational cleaning component. A pressure measuring spring assembly that is in movably contact with the right side of the flexible sealing filler 4 is installed on the left side of the circular ring 9. The pressure measuring spring assembly is electrically connected to the PLC controller 5. The rotational cleaning assembly is used to drive the circular ring 9 to move left and right and to clean the outside of the reducer output shaft 101 when it rotates to prevent impurities from adhering and condensing. The pressure measuring spring assembly is used to elastically squeeze and detect the squeezing force of the flexible sealing filler 4 when the circular ring 9 moves to the left, and the squeezing force is transmitted to the PLC controller 5 for display. The flexible sealing filler 4 is squeezed to shrink it to adjust the degree of sealing of the package. When the squeezing force is reduced due to aging of the flexible sealing filler 4 in the future, the PLC controller 5 is used to control the sound and light alarm 6 to open for alarm reminder.

[0027] Specifically, the rotary cleaning component includes an internal threaded cover 7 threadedly sleeved on an external threaded sleeve 3, the right side of the internal threaded cover 7 is set as a blocking structure and fixedly connected with an annular brush 8, the internal threaded cover 7 and the annular brush 8 are both movably sleeved on the reducer output shaft 101, wherein a movable through hole is opened on the right side of the internal threaded cover 7, the reducer output shaft 101 is located in the movable through hole and does not contact the inner side of the movable through hole, so as to allow the reducer output shaft 101 to movably pass through, the top, bottom, front side and rear side of the internal threaded cover 7 are fixedly connected with a handle rod 16, and the ring 9 is rotatably installed on the right inner wall of the internal threaded cover 7, wherein A bearing 15 is fixedly connected to the inner wall on the right side of the internal thread cover 7, and the inner ring of the bearing 15 is fixedly mounted on the outer side of the ring 9, which has the effect of rotatably installing the ring 9; the internal thread cover 7, the annular brush 8 and the handle rod 16 cooperate with each other, and the internal thread cover 7 is driven to rotate by pulling the handle rod 16. The internal thread cover 7 rotates and moves left and right on the external thread sleeve 3, and the left and right displacement of the internal thread cover 7 is used to achieve the effect of driving the ring 9 to move left and right. The annular brush 8 is used to clean the outer side of the reducer output shaft 101 when it rotates to prevent impurities from sticking and condensing, thereby ensuring the cleanliness of the connection and reducing the phenomenon of dust and impurities getting stuck inside.

[0028] Furthermore, the pressure measuring spring assembly includes a pressure ring 14 arranged on the left side of the circular ring 9, a slide groove 10 is provided on the left top and left bottom of the circular ring 9, a slider 11 is provided in the sliding sleeve of the slide groove 10, wherein a limiting groove is provided at the bottom of the slider 11, and a limiting block slidably connected to the limiting groove is fixedly connected to the bottom inner wall of the slide groove 10, which has the effect of limiting and preventing the slider 11 from falling off, a compression spring 12 in a compressed state is fixedly connected between the right side of the slider 11 and the corresponding right side inner wall of the slide groove 10, a pressure sensor 13 is fixedly connected between the left side of the slider 11 and the right side of the pressure ring 14, and the two pressure sensors 13 are electrically connected to the PLC controller 5, the left side of the pressure ring 14 is in active contact with the right side of the flexible sealing filler 4, and the reducer output shaft 101 is in a position The ring 14 is located inside the annular seat 2, the circular ring 9 and the pressure ring 14 and does not contact the inner sides of the three. The pressure ring 14, the slider 11, the slide groove 10, the compression spring 12 and the pressure sensor 13 cooperate with each other. When the circular ring 9 moves to the left, the compression spring 12, the slider 11 and the pressure sensor 13 are used to drive the pressure ring 14 to squeeze the flexible sealing filler 4 to the left. In the squeezed state, the circular ring 9 that moves to the left compresses the two compression springs 12, and the compression spring 12 in the compressed state is used to perform elastic tightening work to the left. The pressure sensor 13 is used to detect the squeezing force and transmit it to the PLC controller 5 to display the pressure value. The displayed pressure value is used to facilitate personnel to accurately control the pressure, squeeze and adjust the work, so as to prevent the phenomenon that the friction is too large due to excessive pressure or the pressure is too small to cause effective sealing.

[0029] The method of using the present embodiment is as follows: during installation, before the internal thread cover 7 is connected to the external thread sleeve 3, the annular seat 2 is first installed and fixed on the outside of the pumping unit reducer 1, and then the flexible sealing filler 4 is wrapped around the outside of the reducer output shaft 101 and pushed to the left into the external thread sleeve 3, and then the internal thread cover 7 is rotated forward to make it screwed on the external thread sleeve 3 and move to the left. At this time, the internal thread cover 7 drives the circular ring 9 to move to the left. When the circular ring 9 moves to the left, the compression ring 14 is driven to the left to squeeze the flexible sealing filler 4 through the compression spring 12, the slider 11 and the pressure sensor 13 in turn. In the squeezed state, the circular ring 9 that moves to the left compresses the two compression springs 12, and the compression spring 12 in the compressed state is used to perform elastic tightening work to the left. The flexible sealing filler 4 can be elastically tightened by the elastic tightening. The sealing packing 4 always has a leftward tightening compression force. When the flexible sealing packing 4 is squeezed, elastic contraction occurs and it is tightly wrapped around the outside of the reducer output shaft 101. The flexible sealing packing 4 is used to seal the outside of the reducer output shaft 101 to prevent a large amount of oil from leaking out through the outside of the reducer output shaft 101. When tightened, the pressure sensor 13 detects the squeezing force in real time and transmits it to the PLC controller 5 to display the pressure value. By observing the displayed pressure value, the personnel can accurately control the pressure to adjust the squeezing degree of the flexible sealing packing 4, and achieve the effect of accurate pressure control and squeezing adjustment of the flexible sealing packing 4. By accurate pressure control and adjustment, the phenomenon of excessive friction due to excessive pressure or ineffective sealing due to low pressure can be prevented, thereby improving the sealing effect.

[0030] When in use, when the flexible sealing filler 4 becomes thinner due to aging and other factors, the supporting force on the pressure ring 14 is reduced. At this time, the elastic force of the compression spring 12 in the compressed state can automatically drive the pressure ring 14 to squeeze to the left through the slider 11 and the pressure sensor 13 in turn. At this time, a part of the compression spring 12 is released, and the squeezing force borne by the pressure sensor 13 becomes lower. The pressure value transmitted to the PLC controller 5 is reduced. When the pressure drops below the preset value, the PLC controller 5 controls the sound and light alarm 6 to automatically turn on the alarm to remind the personnel, so as to achieve the effect of timely reminding the personnel to adjust when the squeezing force is reduced due to aging and other factors, so that the personnel can know in time to make adjustments and improve the use effect.

[0031] When adjusting, the personnel can rotate the internal thread cover 7 forward again to move it to the left again, and then the tightening and squeezing force to the left can be adjusted. When the flexible sealing packing 4 needs to be replaced later, the internal thread cover 7 is rotated in the opposite direction to separate it from the external thread sleeve 3, and the sealing and squeezing can be released. Then the flexible sealing packing 4 can be taken out from the external thread sleeve 3, and the new flexible sealing packing 4 is put into the external thread sleeve 3, and finally the internal thread cover 7 is screwed on the external thread sleeve 3 for controlled pressure and squeezing, so that the flexible sealing packing 4 can be replaced conveniently; when the reducer output shaft 101 of the oil pump reducer 1 rotates normally, its outer side will form friction with the inner side of the annular brush 8, and the annular brush 8 is used to realize the effect of automatically brushing and cleaning the outer side of the reducer output shaft 101 when it rotates, thereby reducing the phenomenon that dust and impurities on the outer side are statically attached and condensed to cause jams in the sealing position, and improving the cleanliness of the connection.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sealing device for a pumping unit reducer, comprising a sealing device body installed outside a pumping unit reducer (1) and sleeved on a reducer output shaft (101), characterized in that: The sealing device body comprises an annular seat (2) fixed by a sealing thread on the right side of the pumping unit reducer (1); the right side of the annular seat (2) is fixedly connected with an external thread sleeve (3); a flexible sealing packing (4) is movably sleeved inside the external thread sleeve (3); and the flexible sealing packing (4) is movably sleeved on the reducer output shaft (101); The top right side of the annular seat (2) is fixedly connected to a PLC controller (5), the top of the PLC controller (5) is fixedly and electrically connected to a sound and light alarm (6), the upper threaded sleeve of the external threaded sleeve (3) is provided with a rotary cleaning component that is movably sleeved on the outside of the reducer output shaft (101), a circular ring (9) is rotatably mounted on the right inner wall of the rotary cleaning component, a pressure measuring spring assembly that is movably in contact with the right side of the flexible sealing filler (4) is mounted on the left side of the circular ring (9), and the pressure measuring spring assembly is electrically connected to the PLC controller (5).

2. The sealing device for the oil pump reducer according to claim 1, characterized in that: The rotary cleaning assembly comprises an internal thread cover (7) threadedly sleeved on an external thread cover (3); the right side of the internal thread cover (7) is arranged as a blocking structure and is fixedly connected to an annular brush (8); the internal thread cover (7) and the annular brush (8) are both movably sleeved on the output shaft (101) of the reducer; the top, bottom, front side and rear side of the internal thread cover (7) are fixedly connected to a handle bar (16); and the ring (9) is rotatably mounted on the right inner wall of the internal thread cover (7).

3. The sealing device for the oil pump reducer according to claim 1, characterized in that: The pressure measuring spring assembly comprises a pressure ring (14) arranged on the left side of the circular ring (9), a slide groove (10) is provided at the left top and the left bottom of the circular ring (9), a sliding sleeve is provided in the slide groove (10), a compression spring (12) in a compressed state is fixedly connected between the right side of the slider (11) and the right side inner wall of the corresponding slide groove (10), a pressure sensor (13) is fixedly connected between the left side of the slider (11) and the right side of the pressure ring (14), both pressure sensors (13) are electrically connected to the PLC controller (5), and the left side of the pressure ring (14) is in active contact with the right side of the flexible sealing filler (4).

4. The sealing device for the reducer of the oil pumping unit according to claim 3, characterized in that: The reducer output shaft (101) is located inside the annular seat (2), the circular ring (9) and the pressure ring (14) and does not contact the insides of the three.

5. The sealing device for the reducer of the oil pumping unit according to claim 2, characterized in that: A movable through hole is provided on the right side of the internal thread cover (7), and the reducer output shaft (101) is located in the movable through hole and does not contact the inner side of the movable through hole.

6. The sealing device for the reducer of the oil pumping unit according to claim 2, characterized in that: A bearing (15) is fixedly connected to the right inner wall of the internal thread cover (7), and the inner ring of the bearing (15) is fixedly sleeved with the outer side of the ring (9).

7. The sealing device for the reducer of the oil pumping unit according to claim 1, characterized in that: A sealing ring is bonded and fixed to the left side of the annular seat (2), and the left side of the sealing ring is in active contact with the right side of the pumping unit reducer (1). The right side of the pumping unit reducer (1) is provided with four thread grooves in annular shape and at equal intervals, and a fixing bolt is threadedly sleeved in the thread groove. The left side of the annular seat (2) and the left side of the sealing ring are both provided with four bolt through holes in annular shape, and the fixing bolt is movably sleeved in two corresponding bolt through holes.

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