阅读说明：本技术 一种高频率液压激振器 (High-frequency hydraulic vibration exciter ) 是由 陆倩倩 邵威 夏春林 于 2020-06-16 设计创作，主要内容包括：本发明提供一种高频率液压激振器。液压振动器由阀体、阀芯、安全罩、传动轴和电机械转换器组成。阀芯上有凸肩,其上均布加工有2组共8条轴向油槽,轴向油槽周期型与阀体上2组共8个径向油孔,工作时,轴向油槽与径向油孔周期型通断。阀体上的2组径向油孔,一组与高压油道相通,另一组与低压油道相通。阀芯在电机械转换器和传动轴驱动下做旋转运动时,阀芯凸肩左右端面压力通过阀体上径向油孔和阀芯上的轴向油槽发生高低压交替,从而驱动阀芯轴向往复运动,实现高频振动。本发明的主要特点是阀芯轴向运动频率高,运动频率由电机械转换器自动控制,结构紧凑。本发明可作为执行元件用于液压振动等对工作频率要求较高的场合。(The invention provides a high-frequency hydraulic vibration exciter. The hydraulic vibrator consists of a valve body, a valve core, a safety cover, a transmission shaft and an electromechanical converter. The valve core is provided with a convex shoulder, 2 groups of 8 axial oil grooves are uniformly distributed and processed on the valve core, the axial oil grooves are periodically connected with 2 groups of 8 radial oil holes on the valve body, and the axial oil grooves and the radial oil holes are periodically connected and disconnected during working. And 2 groups of radial oil holes on the valve body, one group is communicated with the high-pressure oil duct, and the other group is communicated with the low-pressure oil duct. When the valve core rotates under the drive of the electromechanical converter and the transmission shaft, the pressure of the left end face and the right end face of the convex shoulder of the valve core is alternated in high and low pressure through the radial oil hole on the valve body and the axial oil groove on the valve core, so that the valve core is driven to axially reciprocate, and high-frequency vibration is realized. The invention has the main characteristics that the axial movement frequency of the valve core is high, the movement frequency is automatically controlled by the electromechanical converter, and the structure is compact. The invention can be used as an actuating element for occasions with higher requirements on working frequency, such as hydraulic vibration and the like.)

1. A high-frequency hydraulic vibration exciter is characterized in that, the device comprises an electromechanical actuator (1), a motor spacer (2), a motor support (3), a coupler (4), a valve core (5), a left safety cover (6), a safety cover sealing gasket (7), a right safety cover (8), a safety cover connecting bolt (9), a safety cover connecting nut (10), a motor support connecting screw (11), a flat key (12), a left dust blocking ring (13), a left dynamic seal (14), a left guide sleeve (15), a left end cover (16), a valve body (17), a right end cover (18), a right guide sleeve (19), a right dynamic seal (20), a right dust blocking ring (21), a right end cover small-size O-shaped sealing ring (22), a right end cover medium-size O-shaped sealing ring (23), a right end cover large-size O-shaped sealing ring (24), a left end cover O-shaped sealing ring (25) and a valve body connecting bolt (26);

a motor spacer (2) with a buffering effect is arranged between the electromechanical actuator (1) and the motor support (3), the electromechanical actuator (1) is fixed on one side of the motor support (3) through a motor support connecting screw (11), and the other side of the motor support (3) is fixed on a boss (L1) of the left safety cover (6) through the motor support connecting screw (11); the left safety cover (6) is structurally provided with a boss (L1), a left safety cover bolt hole (L2), a left safety cover connecting hole (L3) and a left safety cover shaft hole (L4) in addition; the left safety cover (6) is fixed with the right safety cover (8) through a left safety cover connecting hole (L3) and a right safety cover connecting hole (R3) by a safety cover connecting bolt (9) and a safety cover connecting nut (10), and the right safety cover (8) is also provided with a right safety cover slotted hole (R1) and a right safety cover shaft hole (R2); a safety cover sealing gasket (7) is arranged between the left safety cover (6) and the right safety cover (8) to realize sealing and gap distance adjustment;

a flat key (12) is arranged in a key groove of an extension shaft of the electromechanical actuator (1), the extension shaft is arranged in a coupling shaft hole (ZK) at one end of a coupling (4) and is ensured to be aligned with a coupling shaft key groove (ZJ) on the wall of the coupling shaft hole, the other end of the coupling (4) is processed into an external spline (W), and the external spline (W) on the coupling (4) and an internal spline (N) on the valve core (5) form movable connection; the valve core (5) is processed into a valve core left shaft section (X1), a valve core shoulder (X2) and a valve core right shaft section (X3); the inner spline (N) is processed on the end face of a left shaft section (X1) of the valve core, a left pressure equalizing groove (X4) of the valve core, a right pressure equalizing groove (X5) of the valve core, N first shoulder grooves (X6) of the valve core and N second shoulder grooves (X7) of the valve core are processed on a shoulder (X2) of the valve core, the N first shoulder grooves (X6) of the valve core are uniformly distributed in the circumferential direction of the valve core (5), and the opening faces the left shaft section (X1) of the valve core; the n valve core second shoulder grooves (X7) are uniformly distributed in the circumferential direction of the valve core (5), and the openings of the second shoulder grooves face to the right shaft end (X3) of the valve core and are uniformly distributed with the n valve core first shoulder grooves (X6) in a staggered manner;

the valve core (5) passes through a left safety cover shaft hole (L4) and a central through hole of the left end cover (16) and passes through a valve body through hole (T1) to a central through hole of the right end cover (18) and a right safety cover shaft hole (R2); a left end cover dustproof ring groove (Z1), a left end cover sealing ring groove (Z2) and a left end cover guide ring groove (Z3) are sequentially machined from left to right in the axial direction of a central hole of the left end cover (16); a left dust-blocking ring (13) is arranged in the left end cover dustproof ring groove (Z1), a left dynamic seal (14) is arranged in the left end cover sealing ring groove (Z2), and a left guide sleeve (15) is arranged in the left end cover dustproof ring groove (Z3); a left end cover boss (Z4) and a left end cover O-shaped sealing ring sinking groove (Z5) are machined on the right side of the left end cover (16), a left end cover O-shaped sealing ring (25) is installed in the left end cover O-shaped sealing sinking groove (Z5), and a left end cover connecting hole (Z6) is machined in the outer ring of the left end cover (16);

the left end cover boss (Z4) extends into a valve body through hole (T1) of the valve body (17), and the outer diameter of the left end cover boss (Z4) is smaller than the diameter of the valve body through hole (T1);

the right end face of the left end cover (16) is in contact with the left end face of the valve body (17), the valve body (17) is provided with a valve body through hole (T1), first valve body radial blind holes (T5) are formed along the inner wall of the valve body through hole (T1) at intervals of 360 degrees/n, and second valve body radial blind holes (T6) are formed at intervals of 360 degrees/n; the right end face of the valve body (17) is provided with n valve body first oil holes (T2) and n valve body second oil holes (T3) which are the same in diameter, the n valve body first oil holes (T2) are communicated with the valve body first radial blind holes (T5) one by one, and the n valve body second oil holes (T3) are communicated with the valve body second radial blind holes (T6) one by one; a valve body connecting hole (T4) is axially processed in the valve body (17);

the right end face of the valve body (17) is in contact with a right end cover (18), and a right end cover dust-proof ring groove (Y1), a right end cover sealing ring groove (Y2) and a right end cover guide ring groove (Y3) are sequentially processed in a central through hole of the right end cover (18) of the valve body from right to left; a right dust-blocking ring (21) is arranged in the right end cover dustproof ring groove (Y1), a right dynamic seal (20) is arranged in the right end cover sealing ring groove (Y2), and a right guide sleeve (19) is arranged in the right end cover guide ring groove (Y3); a right end cover boss (Y4) is processed on the left side of the right end cover (18), a right end cover small O-shaped sealing ring sinking groove (Y5), a right end cover first oil guide groove (Y6), a right end cover middle O-shaped sealing ring sinking groove (Y7), a right end cover second oil guide groove (Y8) and a right end cover large O-shaped sealing ring sinking groove (Y9) are processed on the left side of the right end cover (18), the right end cover first oil guide groove (Y6) is positioned between the right end cover small O-shaped sealing ring sinking groove (Y5) and the right end cover middle O-shaped sealing ring sinking groove (Y7), and the right end cover second oil guide groove (Y8) is positioned between the right end cover middle O-shaped sealing ring sinking groove (Y7) and the right end cover large O-shaped sealing ring sinking groove (Y9); a right end cover small-size O-shaped sealing ring (22) is installed in the right end cover small O-shaped sealing ring sinking groove (Y5), a right end cover middle-size O-shaped sealing ring (23) is installed in the right end cover middle-size O-shaped sealing ring sinking groove (Y7), a right end cover large-size O-shaped sealing ring (24) is installed in the right end cover large O-shaped sealing ring sinking groove (Y9), and a low-pressure oil duct (Y14) processed on a right end cover first oil guide groove (Y6) is a blind hole and is communicated with a low-pressure oil port (Y11); the high-pressure oil channel (Y15) is processed on the second oil guide groove (Y8) of the right end cover, and the high-pressure oil channel (Y15) is a blind hole and is communicated with the high-pressure oil port (Y12); the low-pressure oil port (Y11) and the high-pressure oil port (Y12) are both provided with pipe threads to realize connection and sealing with an oil pipe; the valve body (17) is axially processed with four threaded holes (Y13), and the valve body connecting bolt (26) is detachably and fixedly connected with the threaded hole (Y13) of the valve body (17) through a left safety cover bolt hole (L2), a left end cover connecting hole (Z6) and a valve body connecting hole (T4);

the right end cover boss (Y4) extends into a valve body through hole (T1) of the valve body (17), and the outer diameter of the right end cover boss (Y4) is smaller than the diameter of the valve body through hole (T1);

the distance from the first oil hole (T2) of the valve body to the center line of the valve core is consistent with the distance from the first oil guide groove (Y6) of the right end cover to the center line of the valve core, and the first oil guide groove are communicated; the distance from the second oil hole (T3) of the valve body to the center line of the valve core is consistent with the distance from the second oil guide groove (Y8) of the right end cover to the center line of the valve core, and the two oil guide grooves are communicated;

n is a natural number which is not less than 2 and not more than 10 and can be divided by 180.

2. The high-frequency hydraulic vibration exciter according to claim 1, wherein the diameter of the left safety shield shaft hole (L4) is larger than that of the left shaft section (X1) of the valve core; similarly, the diameter of the right safety shield shaft hole (R2) is larger than the diameter of the valve core right shaft section (X2).

3. The high-frequency hydraulic vibration exciter according to claim 1, wherein the valve core shoulder (X2) and the valve body through hole (T1) are processed into clearance fit, and the valve core left shaft section (X1) is kept in clearance fit with the central hole of the left end cover (16) and the left guide sleeve (15); similarly, the valve core right shaft section (X2) is in clearance fit with the central hole of the right end cover (18) and the right guide sleeve (19).

4. The high-frequency hydraulic vibration exciter according to claim 1, wherein the left end face and the right end face of the valve body (17) adopt plane finish machining, and the right end face of the left end cover (16) and the left end face of the right end cover (18) need plane finish machining, so as to ensure that the left end cover O-shaped sealing ring (25), the right end cover small-size O-shaped sealing ring (22), the right end cover medium-size O-shaped sealing ring (23) and the right end cover large-size O-shaped sealing ring (24) can realize reliable oil sealing.

5. The high-frequency hydraulic vibration exciter according to claim 1, wherein the left end cover boss (Z4) and the right end cover boss (Y4) are used for limiting the left limit and the right limit of the valve core (5) and ensuring smooth oil inlet or oil discharge on two sides of the valve core shoulder (X2).

6. The high-frequency hydraulic vibration exciter according to claim 1, wherein when the high-pressure oil port (Y12) is connected with the high-pressure oil of the hydraulic system, and simultaneously, the low-pressure oil port (Y11) is connected with the low-pressure oil or the oil tank of the hydraulic system, the electromechanical converter (1) is powered off, and the valve core (5) stays at the leftmost side or the rightmost side; when the electromechanical converter (1) rotates the valve core (5) clockwise; the valve core first shoulder groove (X4) and the valve core second shoulder groove (X5) are periodically connected with the valve body first radial blind hole (T5) and the valve body second radial blind hole (T6) in a switching mode, and the valve body first radial blind hole (T6) is communicated with the high-pressure oil port (Y12) through a high-pressure oil duct (Y15); the second radial blind hole (T6) of the valve body is communicated with the low-pressure oil port (Y11) through a low-pressure oil passage (Y14); therefore, fluid high-pressure oil on two sides of the valve core shoulder (X2) is switched, and the valve core (5) axially reciprocates.

7. The high-frequency hydraulic vibration exciter according to claim 1, characterized in that the valve core shoulder (X2) is switched between high pressure and low pressure n times twice per rotation of the valve core (5), and the frequency of the reciprocating motion of the valve core (5) along the axis is n times of the rotation frequency, i.e. f-kf_dWherein f-the spool reciprocation frequency; k-frequency multiple, k being n;

f_d-motor rotation frequency.

Technical Field

The invention relates to a high-frequency hydraulic vibration exciter, and belongs to the technical field of hydraulic elements.

Background

Vibration measurement and vibration experimental analysis have wide application in mechanical engineering and engineering structure departments, such as vibration transmission, vibrating screens, vibrating stirrers, mechanical hammers, and the like. The common vibration exciters are of three types, namely electric type, electromagnetic type and electrohydraulic type. The electro-hydraulic vibration exciter has the advantages of large exciting force and large stroke. And because the power-weight ratio of the electrohydraulic vibration exciter is large, the vibration equipment can be miniaturized and lightened, so that the vibration equipment is more suitable for moving equipment than mechanical vibration exciters and electromagnetic vibration exciters. In recent years, hydraulic excitation technology is developed rapidly, but hydraulic excitation equipment has high energy consumption and low efficiency, except for two times of energy conversion of mechanical energy and pressure energy, most existing hydraulic excitation equipment works in a mode that a hydraulic cylinder is controlled by a hydraulic reversing valve, and the hydraulic excitation equipment essentially belongs to a throttling and speed regulating loop and belongs to a high-energy consumption system.

Disclosure of Invention

The invention aims to improve the efficiency of hydraulic vibration excitation equipment, and provides a high-frequency vibration exciter with control and vibration excitation functions by combining the working principle of the current hydraulic vibration excitation system. The regulation of the excitation frequency can be conveniently realized, and the control of the excitation force is quickly realized by combining a hydraulic system.

Therefore, the invention adopts the following technical scheme:

a high-frequency hydraulic vibration exciter is characterized by comprising an electromechanical actuator, a motor spacer, a motor support, a coupling, a valve core, a left safety cover, a safety cover sealing gasket, a right safety cover, a safety cover connecting bolt, a safety cover connecting nut, a motor support connecting screw, a flat key, a left dust blocking ring, a left dynamic seal, a left guide sleeve, a left end cover, a valve body, a right end cover, a right guide sleeve, a right dynamic seal, a right dust blocking ring, a right end cover small-size O-shaped sealing ring, a right end cover medium-size O-shaped sealing ring, a right end cover large-size O-shaped sealing ring, a left end cover O-shaped sealing ring and a valve body connecting bolt;

a motor spacer with a buffering function is arranged between the electromechanical actuator and the motor bracket, the electromechanical actuator is fixed on one side of the motor bracket through a motor bracket connecting screw, and the other side of the motor bracket is fixed on a boss of the left safety cover through a motor bracket connecting screw; the left safety cover structure is provided with a left safety cover bolt hole, a left safety cover connecting hole and a left safety cover shaft hole besides a boss; the left safety cover is fixed with the right safety cover through a left safety cover connecting hole and a right safety cover connecting hole by a safety cover connecting bolt and a safety cover connecting nut, and the right safety cover is also provided with a right safety cover slotted hole and a right safety cover shaft hole; a safety cover sealing gasket is arranged between the left safety cover and the right safety cover to realize sealing and gap distance adjustment;

a flat key is arranged in a key groove of an extension shaft of the electromechanical actuator, the extension shaft is arranged in a coupling shaft hole at one end of a coupling, the flat key is ensured to be aligned with the key groove of the coupling shaft on the wall of the coupling shaft hole, the other end of the coupling is processed into an external spline, and the external spline on the coupling and the internal spline on the valve core form movable connection; the valve core is processed into a valve core left shaft section, a valve core convex shoulder and a valve core right shaft section; the inner spline is processed on the end face of the left shaft section of the valve core, a left pressure equalizing groove of the valve core, a right pressure equalizing groove of the valve core, n first shoulder grooves of the valve core and n second shoulder grooves of the valve core are processed on the shoulder of the valve core, the n first shoulder grooves of the valve core are uniformly distributed in the circumferential direction of the valve core, and the opening of the first shoulder grooves faces the left shaft section of the valve core; the second shoulder grooves of the n valve cores are uniformly distributed in the circumferential direction of the valve core, and the openings face the right shaft end of the valve core and are uniformly distributed with the first shoulder grooves of the n valve cores in a staggered manner;

the valve core penetrates through the left safety cover shaft hole and the central through hole of the left end cover to reach the central through hole of the right end cover and the right safety cover shaft hole through the valve body through hole; a left end cover dustproof ring groove, a left end cover sealing ring groove and a left end cover guide ring groove are sequentially machined from left to right in the axial direction of a central hole of the left end cover; a left dust retaining ring is installed in the left end cover dustproof ring groove, a left dynamic seal is installed in the left end cover sealing ring groove, and a left guide sleeve is installed in the left end cover dustproof ring groove; a left end cover boss and a left end cover O-shaped sealing ring sinking groove are machined on the right side of the left end cover, a left end cover O-shaped sealing ring is installed in the left end cover O-shaped sealing sinking groove, and a left end cover connecting hole is machined in the outer ring of the left end cover;

the left end cover boss extends into a valve body through hole of the valve body, and the outer diameter of the left end cover boss is smaller than the diameter of the valve body through hole;

the right end face of the left end cover is in contact with the left end face of the valve body, the valve body is provided with a valve body through hole, first radial blind holes of the valve body are processed along the inner wall of the valve body through hole at intervals of 360 degrees/n, and second radial blind holes of the valve body are processed at intervals of 360 degrees/n; the right end face of the valve body is provided with n valve body first oil holes and n valve body second oil holes which are the same in diameter, the n valve body first oil holes are communicated with the valve body first radial blind holes one by one, and the n valve body second oil holes are communicated with the valve body second radial blind holes one by one; the valve body is axially processed with a valve body connecting hole;

the right end face of the valve body is contacted with a right end cover, and a right end cover dustproof ring groove, a right end cover sealing ring groove and a right end cover guide ring groove are sequentially processed in a central through hole of the right end cover of the valve body from right to left; a right dust-blocking ring is arranged in the dust-proof ring groove of the right end cover on the right side, a right dynamic seal is arranged in the sealing ring groove of the right end cover, and a right guide sleeve is arranged in the guide ring groove of the right end cover; a right end cover boss is processed on the left side of the right end cover, a right end cover small O-shaped sealing ring sinking groove, a right end cover first oil guide groove, a right end cover middle O-shaped sealing ring sinking groove, a right end cover second oil guide groove and a right end cover large O-shaped sealing ring sinking groove are processed on the left side of the right end cover, the right end cover first oil guide groove is positioned between the right end cover small O-shaped sealing ring sinking groove and the right end cover middle O-shaped sealing ring sinking groove, and the right end cover second oil guide groove is positioned between the right end cover middle O-shaped sealing ring sinking groove and the right end cover large O-shaped sealing ring sinking groove; a right end cover small O-shaped sealing ring is installed in the right end cover small O-shaped sealing ring sinking groove, a right end cover middle O-shaped sealing ring is installed in the right end cover middle O-shaped sealing ring sinking groove, a right end cover large O-shaped sealing ring is installed in the right end cover large O-shaped sealing ring sinking groove, and a low-pressure oil duct processed on a first oil guide groove of the right end cover is a blind hole and is communicated with a low-pressure oil port; the high-pressure oil duct is processed on the second oil guide groove of the right end cover, is a blind hole and is communicated with the high-pressure oil port; the low-pressure oil port and the high-pressure oil port are both processed with pipe threads to realize connection and sealing with an oil pipe; the valve body is axially provided with four threaded holes, and the valve body connecting bolt is detachably and fixedly connected with the threaded holes of the valve body through the left safety cover bolt hole, the left end cover connecting hole and the valve body connecting hole;

the right end cover boss extends into the valve body through hole of the valve body, and the outer diameter of the right end cover boss is smaller than the diameter of the valve body through hole;

the distance between the first oil hole of the valve body and the central line of the valve core is consistent with the distance between the first oil guide groove of the right end cover and the central line of the valve core, and the first oil guide groove and the valve core are communicated; the distance from the second oil hole of the valve body to the center line of the valve core is consistent with the distance from the second oil guide groove of the right end cover to the center line of the valve core, and the two oil guide grooves are communicated;

n is a natural number which is larger than or equal to 2 and smaller than or equal to 10 and can be divided by 180, such as 2, 3, 4, 5, 6 and 10.

Further, the diameter of the shaft hole of the left safety cover is larger than that of the left shaft section of the valve core; similarly, the diameter of the shaft hole of the right safety cover is larger than that of the right shaft section of the valve core.

Furthermore, a convex shoulder of the valve core and a through hole of the valve body are processed into clearance fit, and a left shaft section of the valve core keeps clearance fit with a central hole of a left end cover and a left guide sleeve; similarly, the right shaft section of the valve core is in clearance fit with the central hole of the right end cover and the right guide sleeve.

Furthermore, the left end face and the right end face of the valve body are subjected to plane finish machining, and the left end face of the left end cover and the left end face of the right end cover are subjected to plane finish machining, so that reliable oil sealing can be realized by the left end cover O-shaped sealing ring, the right end cover small-size O-shaped sealing ring, the right end cover medium-size O-shaped sealing ring and the right end cover large-size O-shaped sealing ring.

Furthermore, the left end cover boss and the right end cover boss are used for limiting the left limit and the right limit of the valve core and ensuring that oil inlet or oil discharge on two sides of a valve core shoulder is smooth.

Further, when the high-pressure oil port is communicated with high-pressure oil of the hydraulic system, and meanwhile, the low-pressure oil port is communicated with low-pressure oil or an oil tank of the hydraulic system, at the moment, the electromechanical converter is powered off, and the valve core stays at the leftmost side or the rightmost side; when the electromechanical converter rotates the valve core clockwise; the valve core first shoulder groove and the valve core second shoulder groove are periodically connected with the valve body first radial blind hole and the valve body second radial blind hole, and the valve body first radial blind hole is communicated with the high-pressure oil port through a high-pressure oil duct; the second radial blind hole of the valve body is communicated with the low-pressure oil port through a low-pressure oil duct; therefore, fluid high-pressure oil on two sides of the shoulder of the valve core is switched, and the axial reciprocating motion of the valve core is realized.

Further, the high pressure and the low pressure of the valve core shoulder are switched for n times twice per rotation of the valve core, the frequency of the valve core reciprocating along the axis is n times of the rotation frequency, namely, f is kf_dWherein f-the spool reciprocation frequency; k-frequencyMultiple of rate, k is n; f. of_d-motor rotational frequency; therefore, the frequency multiple can be reduced or improved by reducing or increasing the number of the valve core first shoulder groove, the valve core second shoulder groove, the valve body first radial blind hole and the valve body second radial blind hole. The value of n is preferably 4.

Furthermore, the left safety cover, the safety cover sealing gasket, the right safety cover, the safety cover connecting bolt and the safety cover connecting nut jointly form the safety cover; when the vibration exciter is installed, the specially designed installation bracket can be used for replacing the safety cover bolt and the nut with different specifications, so that the installation and the fixation of the vibration exciter can be realized.

The right end of the valve core penetrates out of the right safety cover. Further, the right end of the valve body is generally processed into a spherical surface, and is in point contact with an object to be excited when an impact occurs.

The valve core with two-dimensional motion has the functions of reversing and exciting, the high-pressure oil pipe and the low-pressure oil pipe are connected to the high-pressure oil port and the low-pressure oil port of the valve core by a hydraulic system, and when the valve core rotates under the driving of the electromechanical converter and the transmission shaft, the pressure of the left end face and the right end face of the convex shoulder of the valve core generates high-pressure and low-pressure alternation through the radial oil hole on the valve body and the axial oil groove on the valve core, so that the valve core is driven to. The invention has the main characteristics that the axial movement frequency of the valve core is high, the movement frequency is automatically controlled by the electromechanical converter, and the structure is compact. The pressure of a high-pressure oil pipe of the hydraulic system is adjusted, so that the output exciting force of the valve core can be adjusted. The high-frequency hydraulic vibration exciter integrates a control function and a vibration exciting function, can be used as an actuating element for occasions with higher requirements on working frequency, such as hydraulic vibration and the like, and has certain economic and engineering application values for outputting high-efficiency high-frequency vibration exciting signals.

Drawings

Fig. 1 is a front view of an embodiment of the high frequency exciter of the present invention.

Fig. 2 is a sectional view B-B of fig. 1.

Fig. 3 is a three-dimensional view of a valve body of an embodiment of the present invention.

Fig. 4 is a three-dimensional view of a coupling according to an embodiment of the invention.

Fig. 5 and 6 are a three-dimensional view and a cross-sectional view of the left safety cover according to the embodiment of the invention.

Fig. 7 is a three-dimensional view of a right safety shield in accordance with an embodiment of the present invention.

Fig. 8 is a three-dimensional view of a valve cartridge according to an embodiment of the present invention.

Fig. 9 and 10 are a right side view and a top view of the valve body according to the embodiment of the present invention, respectively.

Fig. 10a is a cross-sectional view a-a of fig. 10.

Fig. 11 and 12 are a cross-sectional view and a three-dimensional view, respectively, of a left end cap according to an embodiment of the invention.

Fig. 13, 14 and 15 are a right end cover sectional view, a bottom view and a left side view, respectively, of an embodiment of the present invention.

Fig. 16 is a cross-sectional view of a flow channel of one vibration cycle of the high-frequency hydraulic vibration exciter according to the embodiment of the invention.

FIG. 17 is a schematic diagram of an embodiment of the high frequency hydraulic excitation system of the present invention.

Detailed Description

Fig. 1 to 16 show an embodiment of a high-frequency hydraulic vibration exciter, and fig. 17 shows an embodiment of a high-frequency hydraulic vibration system, which is not limited to the embodiment.

Reference is made to the accompanying drawings. The invention relates to a high-frequency hydraulic vibration exciter, which comprises a electromechanical actuator 1, a motor spacer 2, a motor support 3, a coupling 4, a valve core 5, a left safety cover 6, a safety cover sealing gasket 7, a right safety cover 8, a safety cover connecting bolt 9, a safety cover connecting nut 10, a motor support connecting screw 11, a flat key 12, a left dust blocking ring 13, a left dynamic seal 14, a left guide sleeve 15, a left end cover 16, a valve body 17, a right end cover 18, a right guide sleeve 19, a right dynamic seal 20, a right dust blocking ring 21, a right end cover small-size O-shaped sealing ring 22, a right end cover medium-size O-shaped sealing ring 23, a right end cover large-size O-shaped sealing ring 24, a left end cover O-shaped sealing ring 25 and a valve body connecting bolt 26;

a motor spacer 2 with a buffering effect is arranged between the electromechanical actuator 1 and the motor support 3, the electromechanical actuator 1 is fixed on one side of the motor support 3 through a motor support connecting screw 11, and the other side of the motor support 3 is fixed on a boss L1 of the left safety cover 6 through the motor support connecting screw 11. The left safety cover 6 is structurally provided with a boss L1, a left safety cover bolt hole L2, a left safety cover connecting hole L3 and a left safety cover shaft hole L4; the left safety cover 6 is fixed with the right safety cover 8 through a group of 12 safety cover connecting bolts 9 and safety cover connecting nuts 10 through a left safety cover connecting hole L3 and a right safety cover connecting hole R3, and the right safety cover 8 is also provided with a right safety cover slotted hole R1 and a right safety cover shaft hole R2; and a safety cover sealing gasket 7 is arranged between the left safety cover 6 and the right safety cover 8 to realize sealing and gap distance adjustment.

The electromechanical actuator 1 is characterized in that a flat key 12 is arranged in a key groove of an extension shaft, the extension shaft is arranged in a coupling shaft hole ZK at one end of a coupling 4, the flat key 12 is aligned with a coupling shaft key groove ZJ on the wall of the coupling shaft hole, the other end of the coupling 4 is processed into an external spline W, the external spline W on the coupling 4 and an internal spline N on a valve core 5 form movable connection, and through the electromechanical actuator 1 and the coupling 4, a shaft core 5 can be driven by the external spline W to synchronously rotate and can simultaneously reciprocate back and forth along the axial direction of the external spline W under the action of hydraulic pressure. The valve core 5 is processed into a valve core left shaft section X1, a valve core shoulder X2 and a valve core right shaft section X3; the inner spline N is processed on the end face of a left shaft section X1 of the valve core, the tail end of a right shaft section X3 of the valve core is in a cone frustum shape, the top of the cone frustum shape is a spherical surface, a valve core left pressure equalizing groove X4, a valve core right pressure equalizing groove X5, 4 valve core first shoulder grooves X6 and 4 valve core second shoulder grooves X7 are processed on a valve core shoulder X2 of the valve core, the 4 valve core first shoulder grooves X6 are uniformly distributed in the circumferential direction of the valve core 5, and the openings of the valve core first shoulder grooves X6 face the valve core left shaft section X1; the 4 valve core second shoulder grooves X7 are uniformly distributed in the circumferential direction of the valve core 5, and the openings of the valve core second shoulder grooves X7 face to the right shaft end X3 of the valve core and are uniformly distributed in a staggered mode with the 4 first valve core shoulder grooves X6.

The valve core 5 passes through the left safety cover shaft hole L4 and the central through hole of the left end cover 16 to the central through hole of the right end cover 18 and the right safety cover shaft hole R2 through the valve body through hole T1. A left end cover dustproof ring groove Z1, a left end cover sealing ring groove Z2 and a left end cover guide ring groove Z3 are sequentially machined in the axial direction of the central hole of the left end cover 16 from left to right; a left dust-blocking ring 13 is arranged in the left end cover dustproof ring groove Z1, a left dynamic seal 14 is arranged in the left end cover sealing ring groove Z2, and a left guide sleeve 15 is arranged in the left end cover dustproof ring groove Z3; the right side of the left end cover 16 is provided with a left end cover boss Z4 and a left end cover O-shaped sealing ring sinking groove Z5, a left end cover O-shaped sealing ring 25 is arranged in the left end cover O-shaped sealing sinking groove Z5, and 4 left end cover connecting holes Z6 are processed on the outer ring of the left end cover 16.

The right end face of the left end cover 16 is contacted with the left end face of the valve body 17, the valve body 17 is processed with a valve body through hole T1, a first radial blind hole T5 of the valve body is processed on 0 degree, 90 degrees, 180 degrees and 270 degrees along the inner wall of a valve body through hole T1 on the section A-A of the valve body 17, and a second radial blind hole T6 of the valve body is processed on 45 degrees, 135 degrees, 225 degrees and 315 degrees; 4 valve body first oil holes T2 and 4 valve body second oil holes T3 with the same diameter are machined in the right end face of the valve body 17 and are communicated with the valve body first radial blind holes T5 one by one and communicated with the valve body second radial blind holes T6 one by one respectively; the valve body 17 is axially provided with 4 valve body connecting holes T4.

When the valve core rotates, the 4 valve core first shoulder grooves X6 and the 4 valve core second shoulder grooves X7 are periodically switched on and off with the 4 first radial blind holes T5 and the 4 second radial blind holes T6.

The right end face of the valve body 17 is in contact with a right end cover 18, and a right end cover dustproof ring groove Y1, a right end cover sealing ring groove Y2 and a right end cover guide ring groove Y3 are sequentially processed in a central through hole of the right end cover 18 of the valve body from right to left; a right dust-blocking ring 21 is arranged in the right end cover dustproof ring groove Y1, a right dynamic seal 20 is arranged in the right end cover sealing ring groove Y2, and a right guide sleeve 19 is arranged in the right end cover guide ring groove Y3; a right end cover boss Y4 is processed on the left side of the right end cover 18, and a right end cover small O-shaped sealing ring sinking groove Y5, a right end cover first oil guide groove Y6, a right end cover middle O-shaped sealing ring sinking groove Y7, a right end cover second oil guide groove Y8 and a right end cover large O-shaped sealing ring sinking groove Y9 are processed on the left side of the right end cover 18; a right end cover small O-shaped sealing ring 22 is installed in the right end cover small O-shaped sealing ring sinking groove Y5, a right end cover middle O-shaped sealing ring 23 is installed in the right end cover middle O-shaped sealing ring sinking groove Y7, a right end cover large O-shaped sealing ring 24 is installed in the right end cover large O-shaped sealing ring sinking groove Y9, and a low-pressure oil duct Y14 processed on a right end cover first oil guide groove Y6 is a blind hole and is communicated with a low-pressure oil port Y11; the high-pressure oil channel Y15 processed on the second oil guide groove Y8 of the right end cover is a blind hole and is communicated with a high-pressure oil port Y12; the low-pressure oil port Y11 and the high-pressure oil port Y12 are both provided with pipe threads to realize connection and sealing with an oil pipe; the valve body 17 is axially processed with four threaded holes Y13, and the valve body connecting bolt 26 is detachably and fixedly connected with the threaded hole Y13 of the valve body 17 through the left safety cover bolt hole L2, the left end cover connecting hole Z6 and the valve body connecting hole T4.

As shown in FIG. 16, when the valve core 5 works, the on-off relation of the oil passage on the middle section of the valve body 8 is respectively processed by a process of a-b-c-d-a. When the valve core is to be started, the state is a, the relative position of the valve core and the valve body is 0 degrees, high-pressure oil flowing in from a high-pressure oil port Y10 flows into 4 first radial blind holes of the valve body through 4 oil holes 1 of the valve body after passing through a high-pressure oil duct Y13 to an oil guide groove 1 of a right end cover, and because the first radial blind holes are sealed by a boss of the valve core at the position, the high-pressure oil is not communicated with the low-pressure oil, the valve core 5 is at any position of a stroke at the moment, and the valve core 5 is; when the valve core 5 is driven by the electromechanical converter to rotate anticlockwise and the rotation angle is between 0 and 45 degrees, namely a state b, at the moment, a first radial blind hole of the valve body is communicated with a first shoulder groove of the valve core, high-pressure oil P flows into the left end face of a shoulder of the valve core, a second radial blind hole of the valve body is communicated with a second shoulder groove of the valve core, hydraulic oil T on the right end face of the shoulder of the valve core passes through an oil tank, and the valve core extends out to realize excitation; when the relative position of the valve core and the valve body is 45 degrees, namely in a state c, the first radial blind hole and the second radial blind hole of the valve body are both sealed by the shoulder of the valve core and are in a transition state; when the valve core continues to rotate and the relative position is between 45 degrees and 90 degrees, the valve core is in a state d, high-pressure oil P in the first radial blind hole of the valve body flows into the second shoulder groove of the valve core, high-pressure oil is input into an oil cavity on the right side of the shoulder of the valve core at the moment, hydraulic oil T in the oil cavity on the left side of the valve core flows into the second radial blind hole of the valve body through the first shoulder groove of the valve core, and finally flows back to the oil tank through the low-pressure oil duct, and the valve core retracts under the action of. The valve core rotates for one circle to realize the on-off process of a-b-c-d for 4 times, so the excitation frequency is four times of the rotation frequency of the valve core.

The high-frequency hydraulic vibration exciter is suitable for a hydraulic vibration system, and comprises a direct current motor controller C, a motor C1, a coupling C2, a hydraulic pump C3, a hydraulic oil tank C4, a pilot overflow valve C5, a pressure gauge C6, a pressure sensor C7, a data acquisition system C8 and a computer C9 as shown in FIG. 17. The hydraulic pump C3 is a unidirectional quantitative hydraulic pump, and the main shaft of the motor C1 is coaxially connected with the main shaft of the hydraulic pump C3 through a coupler C2. An oil suction port of the hydraulic pump C3 is directly communicated with a hydraulic oil tank C4, an outlet of the hydraulic pump C3 bypasses a parallel pilot-operated overflow valve C5, an outlet of a pilot-operated overflow valve C5 is directly communicated with a hydraulic oil tank C4, a main oil way of the hydraulic pump C3 is directly communicated with a high-pressure oil port Y13 of the high-frequency hydraulic vibration exciter, and a low-pressure oil port Y14 of the high-frequency hydraulic vibration exciter is directly communicated with a hydraulic oil tank C4. The dc motor controller C is configured to output a control signal of the electromechanical converter 1 on the high frequency vibration exciter. When the motor C1 is started, hydraulic oil is output from the hydraulic oil tank C4 to the pilot operated relief valve C5 through the hydraulic pump C3 and flows back to the oil tank through the pilot operated relief valve C5, and at this time, the outlet pressure of the hydraulic pump C3 can be set by adjusting the pressure adjusting bolt of the pilot operated relief valve C5 in conjunction with the pressure gauge C6. The computer C9 writes a program capable of outputting and collecting signals, when in vibration excitation, the computer C9 sends out control signals, the data collection system C8 and the DC motor controller C drive the valve core of the high-frequency vibration exciter to rotate and axially excite, meanwhile, a pressure sensor C7 is installed at the outlet of the hydraulic pump C3, pressure signals at the outlet of the hydraulic pump enter the computer C9 through the data collection system C8, and the control of excitation force can be obtained through the product of the pressure value p and the annular area A of the boss of the valve core, wherein the excitation force F is pA. In this embodiment, the electromechanical converter 1 is selected as a dc motor, and its control signal is directly related to the rotational speed of the dc motor, and if it is desired to obtain a precise excitation frequency, a tachometer may be mounted coaxially with the coupling C2 to obtain the excitation frequency f.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first" and "second" are also used for brevity of description only and do not indicate or imply relative importance.

The invention can also be implemented in other embodiments, and all technical solutions formed by equivalent replacement or equivalent changes are within the protection scope of the invention.