CN212409955U

CN212409955U - Single-piston type dynamic friction supercharging pressure regulating device

Info

Publication number: CN212409955U
Application number: CN202021948576.8U
Authority: CN
Inventors: 黄智勇; 孙烁; 张春莹; 苏新安
Original assignee: Beijing Const Instruments Technology Inc
Current assignee: Beijing Const Instruments Technology Inc
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-01-26
Anticipated expiration: 2030-09-08

Abstract

The utility model provides a single piston formula dynamic friction pressure boost regulator, the device sets up dynamic friction actuating mechanism, make to be in relative rotation state all the time between output piston and the output medium jar, make to be in the stress state of only dynamic friction all the time between the two, eliminate the uncertainty of static friction power, make the stress state between output piston and the output medium jar in the pressure control process stable, no sudden change, improved the response speed of output piston, thereby improved pressure control efficiency, reduce the pressure control fluctuation, improve the pressure control precision; the utility model discloses a mechanical transmission mechanism acts on the output medium jar with pressure boost power, will move friction drive mechanism direct mount simultaneously on the output medium jar, drive output medium jar rotate and with the synchronous axial motion of output medium jar, have advantages such as simple structure compactness, work efficiency height, noise are low.

Description

Single-piston type dynamic friction supercharging pressure regulating device

Technical Field

The utility model belongs to the technical field of pressure check-up, control, concretely relates to single piston formula dynamic friction pressure boost regulator.

Background

In the process of pressure instrument calibration, a pressure boosting and regulating device is generally used for obtaining high-pressure hydraulic pressure or gas. For a single-piston type supercharging and pressure regulating device, a linear motion device or mechanism is generally adopted as a supercharging power source to push an output piston or an output medium cylinder to do reciprocating linear motion along the axial direction of the output medium cylinder, so that the pressure of liquid or gas at an output end is stably controlled at a set value. In the process of pressurizing and adjusting the pressure of the liquid or gas at the output end, the volume of the output medium cylinder is constantly changed, and the output piston or the output medium cylinder does reciprocating linear motion along the axis direction. In the process from rest to movement, for example, during the starting and reversing actions of the output piston or the output medium cylinder, the static friction force between the output piston and the cylinder body along the axis direction is converted into the dynamic friction force, and the static friction force changes along with the pressure and the change of the relative positions of the piston and the cylinder body, so that the stress state of the output piston or the output medium cylinder in the process from rest to movement is uncertain during pressure control, the movement state of the piston cannot be accurately controlled, the pressure value is unstable, and the high efficiency and the high precision of the pressure control of the output medium cannot be realized.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem or a plurality of problems, the utility model provides a single-piston dynamic friction pressure boost regulator.

The utility model adopts the following technical scheme:

a single-piston dynamic friction pressurizing and pressure regulating device comprises an output piston, an output medium cylinder and a dynamic friction driving mechanism (02), wherein the output piston is slidably sleeved in the output medium cylinder in a sealing way, a pressurizing power source acts on the pressurizing end of the output piston or/and the output medium cylinder, the dynamic friction driving mechanism (02) comprises a motor (3) and a transmission limiting component (4) fixedly connected with an output shaft of the motor (3), the transmission limiting component (4) is a gear transmission mechanism or a belt pulley transmission mechanism, a transmission connecting piece matched with the gear transmission mechanism or the belt pulley transmission mechanism is arranged on a piston or/and a medium cylinder, and output torque of the motor (3) is transmitted to the piston or/and the medium cylinder through the transmission limiting component (4) and the transmission connecting piece so as to drive the piston and the medium cylinder to be in a relative rotation state all the time.

In the single-piston dynamic friction supercharging and pressure regulating device, the output piston (16) is arranged on a cylinder barrel (11), the cylinder body of the output medium cylinder (S1) is a rotating body (21) arranged in the cylinder barrel, the output end of the rotating body (21) is provided with a blind hole (211), the output piston (16) extends into the blind hole (211), and the supercharging end of the rotating body (21) takes the inner wall of the cylinder barrel (11) as an axial guide mechanism; the output end shaft section of the rotating body (21) is provided with a transmission connecting piece (24), the dynamic friction driving mechanism (02) is connected to the transmission connecting piece (24) through a strip hole (112) formed in the cylinder barrel (11), and power is transmitted to the rotating body (21) to drive the output medium cylinder (S1) to rotate relative to the output piston (16).

In the single-piston dynamic friction supercharging pressure regulating device, the output piston (16) and the inner wall of the blind hole (211) of the rotating body (21) form dynamic seal through a combined sealing element (23).

In the single-piston dynamic friction pressurizing and pressure regulating device, the combined sealing element (23) comprises an output guide ring (233), an output sealing ring (232), an output sealing ring (231) and an output retainer ring (234) which are sequentially arranged in a counter bore at the end part of the inner wall of the blind bore (211) from inside to outside, the output guide ring (233) is matched with the output piston (16) to be used as the guide for the axial movement of the rotating body (21), the cross section of the output sealing ring (231) is L-shaped, the output sealing ring (232) is sleeved in a space formed by the lip part (2311) of the output sealing ring and the inner wall of the blind bore (211) and forms a seal with the inner wall of the blind bore (211) to apply radial pre-tightening force to the lip part (2311) of the output sealing ring, and; the opening end of the blind hole (211) is in threaded connection with a pressing nut (245), and the pressing nut (245) presses and fixes the combined sealing element (23) in a counter bore of the wall of the blind hole (211).

In the single-piston dynamic friction supercharging and pressure regulating device, the transmission connecting piece (24) comprises a first bearing (241) and a driven gear (242) which are sequentially arranged at the shaft section of the output end of the rotating body (21) from inside to outside, the first bearing (241) is an inner rotor bearing which is sleeved on the rotating body (21), and the driven gear (242) is connected with the rotating body (21) through a flat key (243);

the transmission limiting assembly (4) is provided with a gear mounting seat (41), a driving gear (42) and an idler gear (44), wherein the driving gear (42) and the idler gear (44) are mounted on the gear mounting seat (41) and are meshed with each other, a lower mounting hole (412) is formed in the gear mounting seat (41), the lower mounting hole (412) is sleeved on the periphery of the first bearing (241) and is fixed, and the idler gear (44) is meshed with a driven gear (242) of the rotating assembly (2).

In the single-piston type dynamic friction supercharging and pressure regulating device, two idle wheels (44) are arranged and are respectively fixed on the gear mounting seat (41), the two idle wheels (44) are mutually meshed, one idle wheel is meshed with the driving gear (42), and the other idle wheel is meshed with the driven gear (242) of the rotating assembly (2).

In the single-piston type dynamic friction supercharging pressure regulating device, second pin shafts (48) are symmetrically arranged on two sides of a lower mounting hole (412) of the gear mounting seat (41), third bearings (49) are respectively arranged on the second pin shafts (48), and the third bearings (49) are outer rotor bearings and extend into kidney-shaped holes (111) formed in two sides of the cylinder barrel (11) to be in rolling contact with the cylinder barrel (11).

In the single-piston dynamic friction supercharging and pressure regulating device, the gear mounting seat (41) is provided with an upper mounting hole (411), a second bearing (43) is fixed in the upper mounting hole (411), the motor (3) is fixed at the upper mounting hole (411) of the gear mounting seat (41), and the driving gear (42) is fixed on an inner rotor of the second bearing (43) and is fixedly connected with the output shaft (31) of the motor (3).

In the single-piston dynamic friction pressurizing and pressure regulating device, the pressurizing power source is a linear motion device or mechanism capable of accurately controlling axial displacement or thrust.

In the single-piston type dynamic friction pressurizing and pressure regulating device, the linear motion mechanism is a servo electric push rod (12), a servo air cylinder or a servo oil cylinder, and the end part of a push rod (121) of the linear motion mechanism is connected with a thrust bearing (22) arranged at the pressurizing end of a rotating body (21).

The utility model discloses owing to take above design, have following characteristics: the utility model discloses a set up the dynamic friction actuating mechanism for be in relative rotation state all the time between output piston and the output medium jar, make and be in only the stress state of dynamic friction all the time between the two, eliminate the uncertainty of static friction power, make the stress state between output piston and the output medium jar in the pressure control process stable, no sudden change, improved the response speed of output piston, thereby improved pressure control efficiency, reduced pressure control fluctuation, improved pressure control precision; the utility model discloses a mechanical transmission mechanism acts on the output medium jar with pressure boost power, will move friction drive mechanism direct mount simultaneously on the output medium jar, drive output medium jar rotate and with the synchronous axial motion of output medium jar, move friction drive mechanism and play relative axial rolling motion between the cylinder that supports the guide effect, have advantages such as simple structure compactness, work efficiency height.

Drawings

Fig. 1A is a schematic perspective view of an embodiment of the single-piston dynamic friction supercharging and pressure regulating apparatus of the present invention;

FIG. 1B is a partial schematic view of the structure of FIG. 1A (with a cylinder barrel cut away);

FIG. 2 is a sectional view of the pressurizing mechanism of the single-piston dynamic friction pressurizing and pressure regulating device of the present invention;

FIG. 3 is a cross-sectional view of the cylinder assembly of the single-piston dynamic friction pressure boosting and regulating device of the present invention;

fig. 4A is a cross-sectional view of the rotating assembly of the single-piston dynamic friction supercharging and pressure regulating apparatus of the present invention;

FIG. 4B is an enlarged schematic view of region H1 in FIG. 4A;

FIG. 5 is a front view of the dynamic friction driving mechanism of the single-piston dynamic friction pressure boosting and regulating device of the present invention;

FIG. 6 is an interface view taken along line A-A of FIG. 5;

FIG. 7A is a first schematic illustration of a supercharging process;

fig. 7B is a second schematic view of the supercharging process.

The main labels are as follows:

01-a pressure boosting and regulating mechanism; 02-dynamic friction driving mechanism;

1-cylinder component, 11-cylinder, 111-kidney-shaped hole, 112-bar hole; 12-servo electric push rod, 121-push rod; 14-output end cover, 141-mounting hole; 15-lock nut, 16-output piston, 161-output channel;

2-rotating component, 21-rotating body, 211-blind hole; 22-a thrust bearing; 23-composite seal, 231-output seal ring, 2311-output seal ring lip; 232-output sealing ring, 233-output guide ring, and 234-output retainer ring; 24-transmission connecting piece, 241-first bearing, 242-driven gear, 243-flat key, 244-elastic retainer ring and 245-pressing nut; 25-a pressurized guide ring; 26-cylindrical pins;

3-motor, 31-output shaft;

4-transmission limiting component, 41-gear mounting seat, 411-upper mounting hole and 412-lower mounting hole; 42-driving gear, 43-second bearing, 44-idler gear, 45-first pin, 46-oilless bushing, 47-flange screw, 48-second pin, 49-third bearing;

s1-output media cylinder.

Detailed Description

In the process of pressurizing and pressure regulating of the conventional single-piston type pressurizing and pressure regulating device, an output piston or an output medium cylinder is pushed to reciprocate along the axial direction by a linear motion device or a mechanism, so that the volume of the output medium cylinder is changed, and the processes of pressurizing and pressure outputting are realized. However, when the output medium cylinder or the output piston starts, reverses and the like, static friction force along the axial direction exists between the output medium cylinder or the output piston and the output medium cylinder, and the static friction force is different along with the change of pressure and piston position, so that uncertainty exists when the output piston or the output medium cylinder is controlled to overcome the static friction force and convert the static friction force into dynamic friction, pressure fluctuation and sudden change of an output end are caused, stable control of pressure cannot be realized, and the precision and efficiency of pressure control are influenced.

In order to solve the problem, the utility model provides a single piston formula dynamic friction pressure regulating supercharging device, the device improves current pressure regulating supercharging device: the output medium cylinder is set as a rotating assembly, so that the output piston and the output medium cylinder can rotate relatively; the output medium cylinder is arranged in the cylinder barrel, the inner wall of the cylinder barrel is used as a guide mechanism to move axially, the structure of the cylinder barrel is improved, and at least one hole is formed in the area, located outside the stroke range of the output medium cylinder, of the cylinder barrel. The device also provides a dynamic friction driving mechanism, and the mechanism extends into the strip hole of the cylinder barrel and is connected with the output medium cylinder (rotating part), so that the output medium cylinder can rotate under the driving of the dynamic friction driving mechanism and can synchronously move with the dynamic friction driving mechanism in the axial direction.

Furthermore, the dynamic friction driving mechanism comprises a motor and a transmission limiting assembly, the transmission limiting assembly is connected with an output shaft of the motor, the power of the motor is transmitted to the output medium cylinder through a gear transmission mechanism or a belt pulley transmission mechanism matched with a bearing, and meanwhile, the dynamic friction driving mechanism is fixedly connected with the output medium cylinder so as to be capable of synchronously and axially moving with the booster piston.

Preferably, the dynamic friction drive mechanism is in rolling contact with the cylinder.

The following detailed description is made on the single-piston dynamic friction type pressure-regulating and pressurizing device according to the present invention with reference to the accompanying drawings. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The utility model discloses the structure of an embodiment of single piston dynamic friction formula pressure regulating supercharging device is shown as figure 1A and figure 1B, including pressure boost pressure regulating mechanism 01 and dynamic friction actuating mechanism 02, wherein:

the structure of the pressurizing and pressure regulating mechanism 01 is shown in fig. 2, and comprises a cylinder barrel component 1 and a rotating component 2 arranged inside the cylinder barrel component, wherein the rotating component 2 can move in the cylinder barrel component 1 along the axial direction and rotate relative to the cylinder barrel component 1.

Referring to fig. 3, the cylinder barrel assembly 1 includes a cylinder barrel 11, the cylinder barrel 11 is a hollow cylindrical structure, two ends of the cylinder barrel 11 are open (an output end and a pressurizing end respectively), the output end is provided with an output end cover 14, the pressurizing end is provided with a servo electric push rod 12, and a housing of the servo electric push rod 12 can be fixedly locked with the cylinder barrel 11 through screws; the output end cap 14 can be fixed and locked with the cylinder 11 by screws.

The cylinder barrel assembly 1 is further provided with an output piston 16, the head of the output piston 16 penetrates through a mounting hole 141 formed in the output end cover 14 and is fixed on the output end cover 14 through a locking nut 15, the tail of the output piston extends into the cylinder barrel 11, the output piston 16 is provided with an axial through hole serving as an output channel 161, and one end, extending out of the cylinder barrel 11, of the output channel 161 is in threaded connection with an output load.

The structure of the rotating assembly 2 is as shown in fig. 4A and 4B, the rotating assembly 2 is provided with a rotating body 21, the rotating body 21 is arranged inside the cylinder 11 and comprises an output end and a pressurizing end, the output end of the rotating body 21 is provided with a blind hole 211, the output piston 16 extends into the blind hole 211, the inner wall of the open end of the blind hole 211 and the periphery of the output piston 16 form a dynamic seal through a combined sealing member 23, and the blind hole 211 of the rotating body 21, the output piston 16 and the combined sealing member 23 cooperate to form a sealed space as an output medium cylinder S1. The combined sealing element 23 can be a conventional combined sealing element suitable for a dynamic sealing occasion, preferably, the combined sealing element 23 comprises an output guide ring 233, an output sealing ring 232, an output sealing ring 231 and an output retainer ring 234 which are sequentially arranged in a sunken hole at the end part of the inner wall of the blind hole 211 from inside to outside, the output guide ring 233 and the output piston 16 are matched to be used as the guide for the axial movement of the rotating body 21, the cross section of the output sealing ring 231 is in an L shape, the output sealing ring 232 is sleeved in a space formed by a lip 2311 (here, an L-shaped vertical part) of the output sealing ring and the inner wall of the blind hole 211, forms a seal with the inner wall of the blind hole 211 and applies a radial pre-tightening force to the lip 2311 of the output sealing ring, and the output retainer ring 234 is; the open end of the blind hole 211 of the rotating body 21 is connected with a pressing nut 245 in a threaded manner, the pressing nut 245 presses and fixes the combined sealing element 23 in a counter bore of the wall of the blind hole 211, and meanwhile, as the output sealing ring 232 is pressed, a radial pre-tightening force is applied to the lip of the output sealing ring 231, so that the output sealing ring 231 and the output piston 16 are always in close contact to form reliable sealing.

The output end shaft section of the rotating body 21 is provided with a transmission connecting piece 24 for connecting the dynamic friction driving mechanism 02, the transmission connecting piece 24 comprises a first bearing 241, an elastic retainer ring 244 and a driven gear 242 which are sequentially arranged on the output end shaft section from inside to outside, and the first bearing 241 is an inner rotor bearing which is sleeved on the rotating body 21 and is used for fixedly connecting the dynamic friction driving mechanism 02; the driven gear 242 is connected to the rotating body 21 by a flat key 243 and spaced from the first bearing 241 by a circlip 244 so that the driven gear 242 and the rotating body 21 can rotate synchronously; the pressing nut 245 presses and fixes the transmission connecting piece 24 on the output shaft section of the rotating body 21.

The pressure boost end of rotor 21 and the inner wall sliding connection of cylinder 11, pressure boost guide ring 25 nestification is in the recess that the pressure boost end was equipped with, and plays rotor 21 axial motion's guide effect with the cylinder 11 inner wall, and pressure boost guide ring 25 is fixed with rotor 21 circumference through cylindric lock 225, ensures that pressure boost guide ring 25 and rotor 21 can reliably rotate relatively as a whole and cylinder 11 inner wall, and the pressure boost end of rotor 21 and the sealed of cylinder 11 inner wall are not required this moment. The end face of the supercharging end of the rotor 21 is embedded with a thrust bearing 22, the thrust bearing 22 is a conventional separated bearing (which can be purchased) for bearing axial force, and generally comprises a shaft ring, a seat ring and a rolling body positioned between the shaft ring and the seat ring, the seat ring is fixed in a counterbore at the end face of the supercharging end of the rotor, the shaft ring is fixedly connected with the end part of the push rod 121 of the servo electric push rod 12, the rotor 21 requires an axial pretightening force on the thrust bearing 22 in the axial movement process, so that the shaft ring, the seat ring and the rolling body are always kept as a whole without separation.

The dynamic friction driving mechanism 02 is constructed as shown in fig. 5 and 6, and includes a motor 3 and a transmission limiting assembly 4, wherein the motor 3 provides a driving force, and an output shaft 31 thereof is connected to the transmission limiting assembly 4 and transmits the power to the rotating assembly 2 through the transmission limiting assembly 4. The transmission limiting assembly 4 is a gear transmission mechanism, and includes a gear mounting seat 41, and a driving gear 42 and an idler gear 44 which are arranged on the gear mounting seat 41, an upper mounting hole 411 is arranged at the upper end of the gear mounting seat 41, a second bearing 43 is fixed in the upper mounting hole 411, the second bearing 43 is an inner rotor bearing, the driving gear 42 is fixed on an inner rotor of the second bearing 43, the motor 3 can be a brushless speed reduction motor, and is mounted on the gear mounting seat 41 through a motor adapter plate, and an output shaft 31 of the motor 3 is fixedly connected (for example, fixedly connected through a jackscrew) with the driving gear 42; the number of the idler gears 44 is determined by the specification of the motor, the size of the driving gear 42 and the structure of the cylinder 11, the number is basically not required, and only plays a role of transmitting power, in the embodiment, two idler gears 44 are arranged and are respectively fixed on the gear mounting seat 41 through the first pin shaft 45 and the oilless bushing 46, the oilless bushing 46 plays a role of guiding and axially positioning, and the driving gear 42 and the idler gears 44 are mutually meshed and are used for transmitting torque; the lower end of the gear mounting seat 41 is provided with a lower mounting hole 412, the lower mounting hole 412 is sleeved on the periphery of the first bearing 241 of the rotating assembly 2 and is fixed through a flange screw 47, so that the gear mounting seat 41 and the rotating body 21 are relatively fixed; meanwhile, the driven gear 242 of the rotation unit 2 is engaged with the outermost idle gear 44, and the rotation torque of the motor 3 is transmitted to the rotation body 21 through the driving gear 42, the two idle gears 44, and the driven gear 242 in this order. Preferably, in order to limit the gear mounting base 41 and prevent circumferential rotation of the gear mounting base, second pin shafts 48 are symmetrically mounted on two sides of a lower mounting hole 412 of the gear mounting base 41, third bearings 49 are respectively mounted on the second pin shafts 48, the third bearings 49 are outer rotor bearings, and the third bearings 49 are separated from the gear mounting base 41 by a gasket.

In order to realize the connection, one end of the cylinder 11 close to the output end cover 14 is provided with a bar hole 112 for accommodating a combination of the dynamic friction driving mechanism 02 and the rotating component 2, and the size of the bar hole 112 is determined according to the size of the transmission limiting component 4 and the axial movement stroke range of the rotating component 2; in addition, in order to limit the transmission limiting assembly 4 and prevent the transmission limiting assembly from rotating circumferentially relative to the cylinder 11, the side surface of the cylinder 11 is symmetrically provided with a waist-shaped hole 111, the waist-shaped hole 111 is consistent with the axial stroke length of the rotating assembly and is used as a guide groove of the third bearing 49 of the transmission limiting assembly 4, and the third bearing 49 extends into the waist-shaped holes 111 at two sides of the cylinder 11 and is in rolling contact with the cylinder 11.

Obviously, the servo electric push rod 12 as a pressurizing power source can be replaced by a servo air cylinder, a servo oil cylinder or other linear motion mechanism capable of precisely controlling the axial displacement or thrust.

The utility model discloses single piston formula dynamic friction pressure boost pressure regulating device of cost is constituteed according to above-mentioned relation of connection to above parts, the device working process as follows:

the rotating assembly 2 rotates relative to the cylinder 11 under the driving of the dynamic friction driving mechanism 02, and the dynamic friction driving mechanism 02 does not rotate along with the rotating assembly 2 due to the guiding fit of the third bearings 49 of the transmission limiting assembly 4 and the kidney-shaped holes 111 on the two sides of the cylinder 11. Referring to fig. 7A and 7B, in operation, the motor 3 is started, and the rotating assembly 2 always rotates relative to the cylinder 11 under the action of the dynamic friction driving mechanism 02; a medium with certain pressure is input into the output medium cylinder S1 through the output channel 161, so that the rotating component 2 and the dynamic friction driving mechanism 02 move to the pressurizing end in the cylinder 11, meanwhile, the push rod 121 also synchronously moves to the tail end of the pressurizing end, and the rotating component 2 always has pretightening force on the thrust bearing 22 in the process of axial movement; the servo electric push rod 12 outputs power to act on the pressurizing end of the rotating assembly 2 through the push rod 121, the rotating body 21 and the dynamic friction driving mechanism 02 axially move towards the output end of the cylinder barrel 11, and the volume of the output medium cylinder S1 is compressed to pressurize. Until a stable output pressure is obtained or the rotor 21 together with the dynamic friction drive 02 moves to the output end of the cylinder 11, a pressurization and pressure output process is completed.

It should be noted that, in the single-piston dynamic friction pressure-regulating device of the present invention, the medium type may be liquid or gas, but when the single-piston dynamic friction pressure-regulating device is mainly used as a pressure-regulating device, the medium inputted into the output medium cylinder S1 may only be liquid. When the medium input into the output medium cylinder S1 is gas, the pressurization effect is limited due to the compressibility of the gas, but high-precision pressure fine adjustment can still be achieved. In addition, the pressurization and pressure regulation are performed by adopting a dynamic friction mode that the piston and the cylinder body rotate relatively, the realization of the device structure is not limited to the above embodiment, for example, the power transmission mode can adopt other modes (such as a belt pulley) besides a gear; the dynamic friction driving mechanism 02 and the rotating component 2 can synchronously move axially and also can move axially relatively, but the axial friction force between the dynamic friction driving mechanism 02 and the cylinder barrel 11 is ensured to be rolling friction; other combinations of seals between the output piston 16 and the inner wall of the output media cylinder S1 are possible.

Technical scheme more than adopting, the utility model discloses single piston dynamic friction formula pressure boost pressure regulating method and device has following technical characterstic and technological effect:

1) by additionally arranging the dynamic friction driving mechanism 02, the driving rotor 21 rotates relative to the cylinder barrel 11 and the combined sealing element 23 (rotor 21) rotates relative to the output piston 16, the stressed state that only dynamic friction exists between the piston and the cylinder barrel is kept, the static friction force between the piston and the cylinder barrel along the axial direction is eliminated, the piston and the cylinder barrel can rapidly and stably move relative to each other along the axial direction in the pressure control process, the influence of uncertainty of the static friction force is avoided, and the piston can be accurately started and stopped at any position in the axial direction in the rotating state.

2) The dynamic friction driving mechanism 02 and the rotating component 2 (namely the output medium cylinder S1) are connected through an inner rotor bearing, the axial directions of the two are relatively fixed, the dynamic friction driving mechanism 02 and the rotating component 2 form an integrated combined structure, the two rotate relatively but move axially synchronously (namely the radial force when the gears are meshed is the internal force in the integrated combined structure), and the phenomena of position deviation and uneven stress caused by the action of external force between the piston and the cylinder body are eliminated.

3) The second pin shafts 48 symmetrically arranged on two sides of the dynamic friction driving mechanism 02 are limited in waist-shaped holes 111 on two sides of the cylinder barrel 11, the waist-shaped holes 111 are simultaneously used as a guide mechanism of the dynamic friction driving mechanism 02, the dynamic friction driving mechanism 02 adopts two opposite rolling bearings, the torque generated by the circumferential dynamic friction force borne by the rotation of the rotating assembly 2 is overcome, rolling is used for replacing sliding, the guide mechanism is guaranteed to be rolling friction along the axis direction, and the friction force introduced in the axis direction is reduced.

4) The output piston 16 is sealed in a combined sealing mode, and the friction force between the output piston and the cylinder body is small during rotation and reciprocating linear motion.

It will be understood by those skilled in the art that these examples or embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention, and that various equivalent modifications and changes may be made without departing from the scope of the present invention.

Claims

1. A single-piston dynamic friction pressurizing and pressure regulating device comprises an output piston and an output medium cylinder, wherein the output piston is slidably sleeved in the output medium cylinder in a sealing manner, a pressurizing power source acts on the pressurizing end of the output piston or/and the output medium cylinder, the device is characterized by further comprising a dynamic friction driving mechanism (02), wherein the dynamic friction driving mechanism (02) comprises a motor (3) and a transmission limiting component (4) fixedly connected with an output shaft of the motor (3), the transmission limiting component (4) is a gear transmission mechanism or a belt pulley transmission mechanism, a transmission connecting piece matched with the gear transmission mechanism or the belt pulley transmission mechanism is arranged on the piston or/and the medium cylinder, and the output torque of the motor (3) is transmitted to the piston or/and the medium cylinder through the transmission limiting component (4) and the transmission connecting piece so as to drive the piston and the medium cylinder to be in a relative rotation state all the time.

2. The single-piston dynamic friction supercharging and pressure regulating device according to claim 1, wherein the output piston (16) is mounted on a cylinder (11), the cylinder body of the output medium cylinder (S1) is a rotating body (21) disposed inside the cylinder, the output end of the rotating body (21) is provided with a blind hole (211), the output piston (16) extends into the blind hole (211), and the supercharging end of the rotating body (21) uses the inner wall of the cylinder (11) as an axial guide mechanism; the output end shaft section of the rotating body (21) is provided with a transmission connecting piece (24), the dynamic friction driving mechanism (02) is connected to the transmission connecting piece (24) through a strip hole (112) formed in the cylinder barrel (11), and power is transmitted to the rotating body (21) to drive the output medium cylinder (S1) to rotate relative to the output piston (16).

3. The single-piston dynamic friction supercharging and pressure regulating device according to claim 2, characterized in that the output piston (16) forms a dynamic seal with the inner wall of the blind hole (211) of the rotating body (21) via a composite seal (23).

4. The single-piston dynamic friction supercharging and pressure regulating device according to claim 3, characterized in that the combined sealing member (23) comprises an output guide ring (233), an output sealing ring (232), an output sealing ring (231) and an output retainer ring (234) which are sequentially arranged in a counterbore at the end part of the inner wall of the blind hole (211) from inside to outside, the output guide ring (233) is matched with the output piston (16) to serve as the guide for the axial movement of the rotating body (21), the cross section of the output sealing ring (231) is L-shaped, the output sealing ring (232) is sleeved in a space formed by a lip (2311) of the output sealing ring and the inner wall of the blind hole (211) and forms a seal with the inner wall of the blind hole (211) to apply radial pre-tightening force to the lip (2311) of the output sealing ring, and the output retainer ring (234; the opening end of the blind hole (211) is in threaded connection with a pressing nut (245), and the pressing nut (245) presses and fixes the combined sealing element (23) in a counter bore of the wall of the blind hole (211).

5. The single-piston dynamic friction supercharging and pressure regulating device according to any one of claims 2 to 4, characterized in that the transmission connecting member (24) comprises a first bearing (241) and a driven gear (242) which are sequentially arranged at the output end shaft section of the rotating body (21) from inside to outside, the first bearing (241) is an inner rotor bearing which is sleeved on the rotating body (21), and the driven gear (242) is connected with the rotating body (21) through a flat key (243);

6. The single-piston dynamic friction supercharging and pressure regulating device according to claim 5, characterized in that two idler gears (44) are provided, and are respectively fixed on the gear mounting base (41), the two idler gears (44) are meshed with each other, one idler gear is meshed with the driving gear (42), and the other idler gear is meshed with the driven gear (242) of the rotating assembly (2).

7. The single-piston type dynamic friction supercharging and pressure regulating device according to claim 5, wherein the two sides of the lower mounting hole (412) of the gear mounting seat (41) are symmetrically provided with second pin shafts (48), the second pin shafts (48) are respectively provided with third bearings (49), and the third bearings (49) are outer rotor bearings which extend into kidney-shaped holes (111) formed in the two sides of the cylinder barrel (11) and are in rolling contact with the cylinder barrel (11).

8. The single-piston type dynamic friction supercharging and pressure regulating device according to claim 5, characterized in that the gear mounting seat (41) is provided with an upper mounting hole (411), a second bearing (43) is fixed in the upper mounting hole (411), the motor (3) is fixed at the upper mounting hole (411) of the gear mounting seat (41), and the driving gear (42) is fixed on an inner rotor of the second bearing (43) and is fixedly connected with the output shaft (31) of the motor (3).

9. The single-piston dynamic friction supercharging pressure regulating device according to any one of claims 2 to 4, wherein the supercharging power source is a linear motion device or mechanism capable of accurately controlling axial displacement or thrust.

10. The single-piston dynamic friction supercharging and pressure regulating device according to claim 9, characterized in that the linear motion mechanism is a servo electric push rod (12), a servo cylinder or a servo oil cylinder, and the end of the push rod (121) of the linear motion mechanism is connected with a thrust bearing (22) arranged at the supercharging end of the rotating body (21).