425 results about "Double acting" patented technology

The invention discloses a core shooter with a quick mold changing structure and a matched core box, and relates to the technical field of mold manufacturing. A core shooter movable plate is provided with a seam allowance groove and an electromagnetic coil, a core box upper mold is provided with a seam allowance boss with a permanent magnet, and three-stage magnetic coupling control is achieved through a control system, specifically, during mold closing, homopolar repulsive force guiding is conducted to avoid collision, during positioning, heteropolar attraction force locking is conducted, and during mold changing, homopolar repulsive force pushing separation is conducted. And three-dimensional accurate positioning and mechanical redundancy locking are formed by a clamping jaw clamping mechanism driven by a double-acting oil cylinder under the assistance of taper fit of right-angle limiting grooves in the four corners of the supporting plate and positioning blocks of the fixing plate. Through magnetic coupling automatic guiding and mechanical cooperative clamping, the mold changing time is shortened to be within 2 minutes from 30-40 minutes, single-person operation is achieved, the positioning precision and the vibration resistance are improved, the labor intensity is remarkably reduced, and the mold changing device is suitable for efficient and continuous production in the casting industry.

The invention discloses a self-adaptive clamp adjusting method based on intelligent vision and pneumatic control. The self-adaptive clamp adjusting method is suitable for a multi-variety small-batch flexible manufacturing scene. According to the method, a closed-loop control framework composed of multi-mode sensing, hybrid modeling, dynamic optimization and pneumatic execution is constructed, and precise sensing and rapid compensation of part deformation under the complex working condition are achieved. Submillimeter deformation data is obtained in real time by fusing binocular vision, optical fiber strain and a laser displacement sensor; dynamically outputting a clamp compensation instruction in combination with the finite element stiffness matrix and an XGBoost prediction model; a PSO-Adapt ivePena lty algorithm is introduced to carry out multi-objective optimization, so that the response speed and the cooperation efficiency of the system are improved; and the pneumatic actuating mechanism adopts a double-acting cylinder and a cam-groove mechanism, so that high-precision adjustment is realized. The method has the advantages of high precision, fast response and strong multi-clamp collaboration, and is suitable for the intelligent manufacturing fields of automobiles, aerospace and the like.

The invention relates to a telescopic storage rack, belongs to the technical field of hydraulic driving devices and multi-layer storage rack structures, and mainly solves the problems that an existing storage rack is poor in interlayer synchronism, strenuous in operation and insufficient in long-term stability. The device comprises at least two storage layers, each storage layer is formed by connecting a first frame body and a second frame body in a crossed and sliding mode, and connecting rods of the first frame body and the second frame body penetrate through sliding holes of U-shaped pieces of the opposite side to form a telescopic structure. The hydraulic synchronous driving mechanism comprises a double-acting hydraulic cylinder, a manual hydraulic pump, a two-way control valve and a hydraulic locking valve, the hydraulic cylinder is transversely fixed to the inner side of the first frame body end part, a piston rod is hinged to the second frame body end part, and an oil way is connected to a rodless cavity and a rod cavity of the hydraulic cylinder through a high-pressure hose; the two-way control valve switches the oil flow direction to achieve synchronous stretching and retracting, and the hydraulic locking valve closes an oil way. The device is compact in structure, stable in operation and suitable for high-precision synchronous adjustment scenes such as medical equipment and laboratory operating tables.

The invention discloses a suspended small cased well eccentric integrated double-pipe separated injection pipe column and a separated layer water injection method thereof, and aims to improve the later testing and adjusting success rate of small-diameter separated injection construction and prolong the separated injection validity period. The separate injection pipe column comprises an outer layer pipe and an inner layer pipe. The outer layer pipe comprises a conventional oil pipe, a double-flow-channel eccentric water distributor, an outer connecting sleeve, an adapter connector, a small-diameter oil pipe, a small-diameter packer, a double-acting injection valve, a small-diameter check valve, a screen pipe and a screwed plug which are sequentially connected from top to bottom. The inner-layer pipe comprises a first oil pipe connected to the lower inner end of the double-flow-channel eccentric water distributor and a rear-throwing ball type check valve. The layered water injection method comprises the steps of tripping in a tubular column, pressing and setting, measuring a water absorption index, putting a valve ball to control a water injection channel, and flushing a well. The method can achieve accurate layered water injection, improve the water injection efficiency and prolong the validity period of layered water injection, and is suitable for layered water injection operation of small cased wells.

The invention belongs to the field of electro-hydraulic actuators, and particularly relates to a double-cylinder double-acting rotary electro-hydraulic actuator which comprises a box body, a sealing cover provided with a shaft hole is installed at the front end of the box body, a bearing installed in an inner cavity of the box body is arranged behind the sealing cover, and a gear shaft penetrates through the middle of the bearing. The gear shaft is sleeved with a gear. When the gear shaft is driven, the upper oil cylinder and the lower oil cylinder move oppositely, the pistons on the upper portion and the lower portion drive the racks to be meshed with the gears through jacking, stretching and resetting, and the four cylinders are crossed and symmetrical, so that the gear shaft is evenly pushed by the two oil cylinders all the time in the rotating process, operation is very stable, torque output of the gear shaft is increased in a limited space, and the service life of the gear shaft is prolonged. And the double-acting design enables the opening and closing actions to be actively driven by hydraulic pressure, the control response is fast, the position is accurate, and the hydraulic valve is suitable for opening and closing of large-torque valves of ships, chemical engineering and the like.

A downhole pumping system for subsea use is provided. The pumping system is designed such that all fluid conduits and electrical signal conduits are internalized within the pumping assembly. This design provides a substantially constant and elongated profile for the pumping assembly. The pumping assembly includes a housing containing the power assembly, a power actuator assembly operably linked to the production fluid assembly, and a central bore extending through the pumping assembly to provide fluid communication between the power assembly and a first end of the pumping assembly. The pumping system also includes a flow distributor / connector at the first end or the pump head for providing fluid communication between the pump head and a delivery system extending from the surface to the pumping system. The communicating fluids include a high pressure power hydraulic fluid, a low pressure discharge hydraulic fluid, and a pressurized production wellbore fluid.

An integrated shearing mechanism for a resin-based fiber placement system comprises a mounting frame, more than one double-acting cylinders fixed on the upper end of the mounting frame, each double-acting cylinder is connected to a lower air nozzle and an upper air nozzle; each double-acting cylinder is connected to a movable blade part via a connecting shaft and a spring; the movable blade part comprises a movable blade mounting frame, and a movable blade is mounted on the movable blade mounting frame; the movable blade mounting frame is connected to a slider, the slider is connected to a guide rail, and the guide rail is connected to the mounting frame via a guide rail pressure strip, the movable blade and the fixed blade engage to cut, and the fixed blade is fixed to the lower end of the mounting frame; the movable blade and the fixed blade are pressed together with a mounting frame cover, the mounting frame cover is connected to the mounting frame, and the mounting frame and the mounting frame cover are correspondingly provided with square holes; the present invention is assembled and formed in an integrated manner, and the disassembly and replacement of the tool is easy, the service life is long, the incision quality is good, and the equipment reliability of the automated fiber placement system is improved.

A cylinder is a double-acting single-rod cylinder, one end of the cylinder is a cylinder rodless cavity, the other end of the cylinder is a cylinder rod cavity, and a cylinder body of the cylinder is sequentially provided with sensors I, II and III for detecting the position of a piston or a piston rod; high-speed operation is carried out in sensor I and II regions, and low-speed operation is carried out in other regions; a rodless cavity of the air cylinder is communicated with an OR valve I, and the OR valve I is connected with two-position three-way reversing valves I and II in parallel; a rod cavity of the air cylinder is communicated with an OR valve II, and the OR valve II is connected with two-position three-way reversing valves III and IV in parallel; the two-position three-way reversing valves I and III are connected in parallel, then connected in series with a low-speed pressure reducing valve 1 and connected with an air source; the two-position three-way reversing valves II and IV are connected in parallel, then connected in series with a high-speed pressure reducing valve and connected with an air source; the low-speed pressure-reducing valve and the high-speed pressure-reducing valve are The device is fast in opening and closing, stable in starting, low in cost, good in effect, safe to operate, simple to debug, capable of avoiding door flying, capable of improving installation efficiency and suitable for popularization.

The invention relates to the technical field of anti-unmanned aerial vehicles, in particular to a net capturing power mechanism for anti-unmanned aerial vehicles, which comprises an unmanned aerial vehicle, a launch canister, a launch head and a connecting rope, launching cylinders are fixedly arranged at the lower ends of the unmanned aerial vehicles, the lower ends of the launching cylinders are in pushing connection with launching heads, the lower ends of the launching heads are connected with connecting ropes, the four launching cylinders, the four launching heads and the four connecting ropes are arranged on the four unmanned aerial vehicles, the four connecting ropes connect the four corners of the catching net, and the catching net is pushed in a pushing mode; the side end of the launching head is limited through a limiting switch, the limiting switch carries the launching head, the limiting switch is installed on a launching barrel, a double-acting hydraulic cylinder is arranged in the launching barrel, and the double-acting hydraulic cylinder stretches out and draws back in the launching barrel in a reciprocating mode. Through the arrangement of the structure, the net capturing work of the unmanned aerial vehicle is facilitated.

The invention relates to an automatic screw nut ball assembling device and a pneumatic ball feeding method. Comprising a fixed seat, a material pushing assembly arranged on the fixed seat, a vibration disc arranged above the material pushing assembly and used for conveying balls, a controller electrically connected with the material pushing assembly and the vibration disc, and a ball filling assembly arranged on the fixed seat and located in front of the material pushing assembly. Wherein the pushing assembly comprises a first lifting frame installed on the fixing base, a ball guide rail body arranged on the front side of the first lifting frame and a stop dog connected with the lower portion of the ball guide rail body, and the ball filling assembly comprises a positioning sleeve connected with the stop dog. The controller integrally controls execution components such as the vibration disc, the pushing air cylinder and the double-acting air cylinder, full-process automation from ball conveying, number limiting, ball falling and guiding to pneumatic ball blowing is achieved, continuous cycle operation can be completed through one-key starting only by manual feeding and discharging, the assembly efficiency is improved, and the automatic ball feeding and discharging device can be easily integrated with an automatic production line.

The invention relates to a double-acting hydrodynamic axial sliding bearing (1) comprising: a bearing housing (2) in which there is located a first bearing body (3) having a first axial bearing surface (4), and a second bearing body (5) having a second axial bearing surface (6); and a shaft (7) comprising at least one thrust collar (8), wherein the at least one thrust collar is located in the bearing housing between the first axial bearing surface and the second axial bearing surface and can be supported against the first or second axial bearing surface depending on the axial position of the shaft, and a first or second annular chamber (9, 12) is formed depending on whether the thrust collar is supported against the first or second axial bearing surface.

The application discloses a silicon steel sheet laminating and pressing equipment based on self-control pressure and relates to the technical field of silicon steel sheet manufacturing equipment. The equipment comprises a C-shaped frame, a pressure conduction block and a double-acting hydraulic cylinder. A cross-shaped oil guide groove is milled at the bottom end of the outer wall of the pressure conduction block. Two rows of needle roller bearings are symmetrically installed on the side surface of the outer wall of the pressure conduction block. A laminating pressing plate is fixedly installed at the bottom end of the outer wall of the pressure conduction block. An annular oil cavity is formed at the top end of the outer wall of the laminating pressing plate. The annular oil cavity is communicated with the oil guide groove. A pressure sensing film is fixedly installed at the bottom end of the outer wall of the laminating pressing plate. A strain grid is etched at the rear end of the outer wall of the pressure sensing film. The strain grid etched at the pressure sensing film can sense the pressing pressure, the real-time detection and automatic closed-loop adjustment of the pressing pressure are realized, the problem that the pressure fluctuation of the pressing equipment is large and the laminates are deformed due to overpressure or loose due to insufficient pressure caused by the adjustment depending on manual experience is solved, and the compactness, flatness and core performance consistency of the laminates are improved.

The utility model relates to the technical field of pipeline valves, in particular to a device for controlling slow closing of a check valve, the check valve and a brake, a shell of the brake can axially rotate on a base of the brake, and the brake drives a brake assembly through an internal brake piston to generate friction braking with the shell of the brake; a piston rod of the double-acting piston cylinder is fixedly connected with a shell of the brake through the overturning assembly. The brake fluid storage tank is in one-way communication with a fluid inlet cavity of the double-acting piston cylinder and the brake piston through a first pipeline, the brake fluid storage tank is in two-way communication with the fluid inlet cavity of the double-acting piston cylinder and the brake piston through a second pipeline, and a control valve is arranged on the second pipeline. The brake fluid storage tank is bidirectionally communicated with the fluid return cavity through a third pipeline; friction braking is generated through the braking assembly and the brake shell, the slow closing effect of the valve clack is achieved, the slow closing effect is stable, the water hammer effect is remarkably eliminated, and when a water pump is started, the valve clack of the check valve can be easily and normally opened.

The utility model discloses a rotary temperature measuring structure, which comprises a main mounting plate, the top of the main mounting plate is fixedly connected with a protective cover, the top of the main mounting plate is provided with a telescoping mechanism, a rotating mechanism and a temperature measuring mechanism, the telescoping mechanism comprises a threaded cylinder and a cylinder mounting seat, the threaded cylinder is mounted on the cylinder mounting seat, and the rotating mechanism is mounted on the cylinder mounting seat. And the rotating mechanism is used for realizing the telescopic action of the temperature measuring probe and comprises a pen-shaped cylinder, a guide rail pair, a gear rack, a rotating base, a deep groove ball bearing and a driving arm, the pen-shaped cylinder is fixedly connected with the main mounting plate, and the front end of the pen-shaped cylinder is connected with the guide rail connecting plate. According to the utility model, the double-acting threaded cylinder is used as a telescoping power source, the piston linearly moves to push the temperature measuring probe to telescope, and the pen-shaped cylinder is matched with the gear and the rack for transmission to drive the gear to rotate, so that the temperature measuring probe can rotate, the temperature measuring requirements of different positions in a narrow space are met, and the problem of insufficient flexibility of a traditional temperature measuring mechanism is solved.

The utility model relates to the technical field of mine transportation equipment, in particular to a tail telescopic device of a belt conveyor, which comprises a driving unit, a guide mechanism, a movable tail and an intelligent control system, the driving unit adopts a double-acting hydraulic cylinder and hydraulic station closed oil way design, and the position of a piston rod is locked through a hydraulic lock; the guide mechanism comprises a first guide rail and a second guide rail, and the movable tail is mounted on the first guide rail, so that linear movement of the tail is ensured; a movable carrier roller frame is installed on the second guide rail, and the movable machine tail is connected with the movable carrier roller frame through a round-link chain. According to the device, the tensioning trolley and the carrier roller frame move along the first guide rail and the second guide rail respectively through independent guidance of the double guide rails, mutual interference is avoided, rigid impact is further reduced through flexible connection of the round-link chain, the device adapts to unevenness of the bottom face of a roadway, real-time linkage of the PLC and the tensioning trolley is achieved through intelligent cooperative control, and the response speed of the system is increased.

The present disclosure relates to a coupling arrangement (8) comprising: an input shaft (12) and an output shaft (14), the input shaft (12) and the output shaft (14) being aligned along an axis of rotation (28); a rotor (30) of the electric machine (6), which is arranged concentrically with the rotation axis (28); a sleeve-shaped first piston (36); a sleeve-shaped second piston (38); a first coupling sleeve (40) connected to the first piston (36) and arranged to releasably couple the input shaft (12) to the output shaft (14); a second coupling sleeve (42) connected to the second piston (38) and arranged to releasably couple the rotor (30) of the electric machine (6) to the output shaft (14); and a fixed section (44) arranged between the first piston (36) and the second piston (38). The first piston and the second piston are double acting pistons arranged to be displaced relative to the fixed section.

The utility model discloses a deicing compression structure for snow sweeper. The utility model, including the support: the middle position of one side of support is provided with snow throwing cylinder, the middle position of the other side of support is provided with the protective cover, the top of both ends of support all rotatory mounting has the hydraulic cylinder, the bottom rotatory of other side of support is provided with the movable frame, one end of support and movable frame is provided with transmission structure, the top of support is provided with the drive motor, the other side rotatory of inside of support is provided with the snow roller. The utility model discloses, is provided with deicing compression structure, if need to clean the hard ice on the road, through the double -acting hydraulic cylinder drive first connecting rod and second connecting rod remove, make the support rod can move along with it, drive the ice breaking roller to go up and down, the ice breaking roller closely ground, in the ice breaking roller moving process, through the auxiliary of buffer, make broken roll can break the hard ice on the road, finally by the snow roller will be broken ice and clean up.

The utility model belongs to the technical field of land levelers, and discloses a steering structure and a land leveler. The steering structure comprises a bridge frame, two steering knuckles, a double-acting oil cylinder and a sliding connection assembly. The two steering knuckles are rotationally arranged at the two ends of the bridge frame in the first direction; the double-acting oil cylinder comprises a piston rod and an oil cylinder body arranged on the piston rod in a sliding mode, and the piston rod is fixedly arranged on the bridge frame and extends in the first direction. The sliding connection assembly comprises a sliding connection body and two steering pull rods, the sliding connection body is fixedly connected with the oil cylinder body, meanwhile, the sliding connection body is in sliding connection with the bridge frame in the first direction, and the two ends of the sliding connection body in the first direction are hinged to one ends of the two steering pull rods correspondingly; the ends, away from the sliding connecting body, of the two steering pull rods are hinged to the two steering knuckles correspondingly. According to the steering structure, the sliding connector can limit the oil cylinder body to rotate around the axis of the piston rod, abrasion of the double-acting oil cylinder is reduced, and the service life of the double-acting oil cylinder is prolonged.

The invention discloses a threading and labeling manipulator and a labeling method thereof.The threading and labeling manipulator comprises a manipulator body, the manipulator body is provided with a labeling assembly and a rotating mechanism, the labeling assembly comprises a suction cup and folding air cylinders, the suction cup sucks a label card, and the folding air cylinders are oppositely arranged on the two sides of the suction cup and drive the suction cup to rotate so as to fold the label card; the rotating mechanism drives the labeling assembly to rotate to a corresponding position; and the manipulator is connected with a double-acting cylinder which drives the manipulator to move back and forth along the labeling direction. The method comprises the steps that a suction cup sucks a label card, and a rotating mechanism vertically rotates a labeling assembly and then horizontally rotates to the labeling direction; the folding air cylinder drives the suction cup to swing towards the middle, the label card is folded, and through holes coincide. The double-acting air cylinder drives the labeling assembly to move forwards, so that a label card enters a strapping tape path; after the strapping tape penetrates through the through hole, the suction cup returns to unfold and release the label card, the label card is attached to the surface of the object along with the strapping tape, and the labeling assembly is reset to the initial position.

1. The name of the design product: double cylinder double action hydraulic hose diaphragm pump. 2. The use of the design product: the design is a double cylinder double action hydraulic hose diaphragm pump using compressed air or liquid as power source. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

To provide a compact and lightweight hydraulic system for pressure supply to a hydraulic actuator.SOLUTION: A hydraulic system for pressure supply of a hydraulic actuator, comprises a double-acting hydraulic cylinder 20 having a frist pressure chamber 21 and a second pressure chamber 22, which can be pressurized by a hydraulic pump 12, and a rapid traverse device 52, 66, 70 that hydraulically interconnects the two pressure chambers in a rapid traverse mode, causes hydraulic oil pushed out from one pressure chamber to flow into the other pressure chamber, and hydraulically separates the two pressure chambers in a normal traverse mode.SELECTED DRAWING: Figure 1

The utility model discloses a double-acting sealing ring for a shaft, which belongs to the technical field of sealing and comprises a ring-shaped body deformed by extrusion, the ring-shaped body consists of a first sealing ring part and a second sealing ring part, the first sealing ring part is axially arranged and faces a high-pressure medium, and the second sealing ring part is opposite to the high-pressure medium. An annular groove is formed in the annular surface, facing a high-pressure medium, of the first sealing ring part, and convex parts extruded by a mounting structure are formed on the outer circumferential surface and the inner circumferential surface of the second sealing ring part. The sealing ring for the double-acting sealing shaft overcomes the problems that a traditional sealing ring is prone to abrasion, limited in sealing performance, complex in maintenance and the like, has the advantages of being good in sealing reliability, low in friction characteristic, high in pressure self-sealing capacity and convenient to install and maintain, and can provide a more durable and stable sealing effect under various working conditions.

The invention relates to a cartridge-type electromagnetically actuated double-acting reciprocating piston pump (1), the reciprocating piston pump (1) having a pump axis (10), a pump inlet (5), and a pump outlet (6) and comprising the following: a mounting system (31) which accommodates two coil assemblies (25) of the same design in a stationary manner opposite one another in the axial direction, the first coil assembly (25') having a first annular coil (12') and a first fixed armature (13'), and the second coil assembly (25'') having a second annular coil (12'') and a second fixed armature (13''); a pump piston (19) which integrates the function of an armature and of a delivery piston and is mounted for movement along the pump axis (10) and is arranged radially inside coaxially to the first and second coil assemblies (25', 25''); a first and a second displacement chamber (24', 24''), the volume of which changes when the pump piston (19) in the form of an armature is moved under the effect of the coil assemblies (25); two inlet valves of the same design, specifically a first inlet valve (20') and a second inlet valve (20''); two outlet valves of the same design, specifically a first outlet valve (21') and a second outlet valve (21'').

The application discloses a hydraulic driving multi-cylinder double-acting variable piston diaphragm pump. The pump comprises a pump base body, a power end, a liquid cylinder body, a diaphragm tank and a buffer tank which are installed on the pump base body, the power end is connected with the liquid cylinder body, the diaphragm tank is connected with the liquid cylinder body through connecting pipes respectively, flanges at two ends of the diaphragm tank are connected with suction valves and discharge valves respectively, wherein, the lower end suction valves are connected with suction pipes respectively, the upper end discharge valves are connected with discharge pipes respectively, and the discharge pipes are connected with the buffer tank. The application adopts a swash plate mechanism to realize the reciprocating motion of the multi-cylinder piston, drives the fluid medium in the working cavities on both sides of the piston to make the diaphragm in the diaphragm tank periodically concave-convex deformation, and realizes the self-suction of the pump feeding pulp from the suction pipe and the output of the discharge buffer tank. The diaphragm pump has the advantages of compact structure, small size, reduced output flow pulsation and reduced pulsation load impact of the filter press feeding on the filter plate.

A vehicle includes a frame, a hitch coupled to the frame, a cylinder positioned to move the hitch relative to the frame, the cylinder having a first chamber and a second chamber, and a fluid system fluidly coupled to the cylinder. The fluid system includes an action select valve reconfigurable between a single-acting configuration and a double-acting configuration. The fluid system is configured to supply a fluid to the first chamber to raise the hitch. When the action select valve is in the double-acting configuration, the fluid system controls the cylinder to lower the hitch by draining the fluid from the first chamber and supplying the fluid to the second chamber. When the action select valve is in the single-acting configuration, the fluid system controls the cylinder to lower the hitch by draining the fluid from the first chamber without supplying the fluid to the second chamber.

Damping arrangement (10) of an active suspension for an axle of a motor vehicle, wherein a damping system (10a, 10b) interacts with each wheel of the axle, wherein each of the damping systems (10a, 10b) comprises the following assemblies: a damper (11) comprising a double-acting hydraulic cylinder (12) and a piston (13), wherein the damper (11) can be coupled to a wheel suspension system of the respective wheel, a hydraulic pump (16) and an electric motor (17) for driving the respective hydraulic pump (16), wherein the hydraulic pump (16) can be driven in different directions of rotation by the electric motor (17) to provide different delivery directions, a hydraulic unit (19) comprising a hydraulic reservoir (20) and valves (21, 22, 23, 24), wherein the hydraulic pump (16) and the hydraulic unit (19) of the respective damping system (10a, 10b) interact with hydraulic chambers (14, 15) of the hydraulic cylinder (12) of the respective damping system (10a, 10b) in such a way that, depending on the delivery direction of the hydraulic pump (16) of the hydraulic unit (19), a movement of the piston (13) in a first actuation direction or in a second actuation direction can be provided, wherein the hydraulic pumps (16) and the electric motors (17) of both damping systems (10a, 10b) are combined to form a motor-pump unit (28), characterized in that The motor-pump unit (28) is attached to an axle carrier (41) of the axle on both sides of the same by at least two bearings (29) each, which are each received in a common bearing support (30), wherein a first bearing support (30) is integrated into a first housing cover (31) of a housing (32) of the motor-pump unit (28), and wherein a second bearing support (30) is connected to a second housing cover (35) of the housing (32) of the motor-pump unit (28) via a tie rod (33) and a bearing tube (34).

A pump assembly has a displacement volume that is continuously adjustable by a double-acting control cylinder having first and second control chambers, to which first and second receiving bores, respectively, are assigned. A pressure control valve in the form of a built-in valve is installed in one of the receiving bores and a 3 / 2-way switching valve in the form of a built-in valve is installed in the other of the receiving bores. The pressure control valve and the 3 / 2-way switching valve are each electrically adjustable and are connected to a control device. A target conveying pressure difference can be specified to the control device, and the control device is configured such that, by controlling the pressure control valve and the 3 / 2-way switching valve, the control device adjusts the displacement volume so that the difference between the first and second actual pressures approaches the target conveying pressure difference.

The invention relates to a cleaning device for cleaning a rotating body, wherein the cleaning device has at least one cylinder-piston system operable by pressure medium as a drive means, wherein the at least one cylinder-piston system is designed as a double-acting cylinder-piston system, wherein at least one piston of the at least one cylinder-piston system arranged within the at least one cylinder has a first piston surface and a second piston surface, wherein at least one piston rod is arranged on the side of the second piston surface of the at least one piston, wherein the at least one cylinder-piston system has at least one first cylinder connection of the at least one cylinder for applying pressure medium to the first piston surface and at least one second cylinder connection of the at least one cylinder for applying pressure medium to the second piston surface,wherein at least the at least one first cylinder connection is fluidly connected to at least one pressure medium source, wherein the at least one first cylinder connection is connected to the at least one second cylinder connection via a closable flow path of pressure medium outside the at least one cylinder. Furthermore, the invention relates to a method for operating a cleaning device for cleaning a rotating body.