1145 results about "Balance shaft" patented technology

A casing accommodating therein a pair of balance shafts below the cylinder block comprises an upper casing and a lower casing that can vertically be split, and an oil pump body is molded integrally with one of the upper and lower casings. In addition, one end of each of the two casings is inserted into the oil pump body for support therein, and the two balance shafts are each supported on a bearing provided between the two casings in such a manner as to be split into two halves at an intermediate portion or the other end thereof. With this construction, the oil pump body can be molded together with the casing, thereby making it possible to reduce the number of components used and man hours for assembling. In addition, since the bearings can be split into two halves, when compared with other portions of the balance shafts, the journal portion can be thinned, thereby making it possible not only to reduce the sliding friction but also to make the casing smaller in size and lighter in weight. More over, the degree of freedom of designing balance shafts can also be improved. With the balance shaft supporting structure for an engine the durability of a balancer, as well as the degree of freedom of designing the same are improvided without making the engine larger in size and increasing the number of components used.

The invention relates to a method for statically calibrating a body axial system of a bearing reaction wind tunnel balance, wherein a loading device is arranged on a connecting end of a supporting rod of the wind tunnel balance, and the displacement of the loading device of the wind tunnel balance is measured through a laser displacement sensor which is arranged on a rigid support; after the wind tunnel balance is loaded, the reading of the laser displacement sensor is acquired, and the displacement of the loading device of the wind tunnel balance and the displacement of various loading points are calculated; the load exerted is subjected to translation and synthesized on an origin of a coordinate system of a body axle, and the bearing reaction generated on the wind tunnel balance by a base on the origin of the coordinate system of the body axle is solved and taken as the load of the body axial system of the wind tunnel balance; and a static calibration formula of the wind tunnel balances is solved through the least square method and the Gaussian elimination method by combination of the increment of outputted voltage signals before and after loading of all the wind tunnel balances and the loads of body axial systems. The static calibration method can simplify a static calibration device of the wind tunnel balance, not only does not need to use a complex offset-type or single-vector motion mechanism but also does not need to be limited by the performance of a reference balance, and is simple to calculate due to fixed position of the body axial system of the wind tunnel balance compared with the displacement method of a measuring and loading device.

The invention discloses a non-quenched and tempered steel for a heavy truck balance shaft. The non-quenched and tempered steel is prepared from the following components in percentage by mass: C, Si, Mn, P, S, Cr, V, Ni, Cu, Mo, Ti, Alt, N, O, H, Sn, Sb, As, Pb and Fe. The invention also provides a preparation method of the non-quenched and tempered steel for the heavy truck balance shaft; the non-quenched and tempered steel is produced by virtue of smelting and refining, and reasonable heating, rolling control and cold control processes, and is excellent in properties: the tensile strength of the steel is 960-1000MPa, the yield strength of the steel is 700-750MPa, the elongation percentage of the yield is greater than or equal to 15%, the percentage reduction of area of the steel is greater than or equal to 40% and the longitudinal impact of the steel at the normal temperature of 20 DEG C is greater than or equal to 50J; in addition, the steel has an excellent toughness match, and is excellent in processability, high in forging technical adaptability and steady in performance.

The invention discloses an automatic hot-pressing assembly device of a balancing shaft and a helical gear, comprising a dynamic balancing machine (2), a gear hot-pressing machine (3), a manipulator (4) and a feeding and blanking station (5), wherein the manipulator (4) clamps a balancing shaft to be assembled and a helical gear to be assembled on the feeding and blanking station (5) and respectively sends the balancing shaft to be assembled and the helical gear to be assembled to the dynamic balancing machine (2) and the gear hot-pressing machine (3), the dynamic balancing machine (2) measures the dynamic unbalance quantity of the balancing shaft and carries out direction alignment on the balancing shaft, the helical gear is heated in the gear hot-pressing machine (3), and the balancing shaft subjected to dynamic unbalance measurement and direction alignment is sent into the gear hot-pressing machine (3) through the manipulator (4) and is in hot-pressing assembly with the heated helical gear. The device has sufficient static, dynamic and heat stable rigidity and accuracy; the whole system has good dynamic performance; and an execution element which is selected for a detection measurement and display system has the advantages of high accuracy, good reliability, strong anti-interference ability, high response speed and stable continuous processing performance.

Vibrations generated by the wheel units of a vehicle are reduced by a low pulsating operation that optimally simulates actual vehicle operating conditions. For this purpose the mass moment of inertia of the wheel unit and of rotating components such as the hub and the brake disc are taken into account. The wheel unit is rotatably mounted on a balancing spindle (2) in a measuring apparatus to determine the mass and angular location of balancing weights (31). The vibrations are measured at a speed that corresponds to a typical travel speed of a vehicle. A loading mechanism including a roller shoe (20) applies a force to the tire tread surface through a spring damping (14, 15) to optimally simulate the conditions of a roadway. The roller shoe (20) has rollers (13) with sections of larger and smaller diameters so that neighboring rollers intermesh. The combined masses of the rollers, as reduced to the roller radius dw, corresponds to the rotational mass of the vehicle wheel as reduced to the tread radius (dR). It is also possible to disengage the contact force from the tread surface for dynamically balancing the wheel unit under load-free conditions. Thus, wheel-balancing steps under loaded and load free conditions can be done on one machine.

An apparatus for controlling backlash comprising an intermediate gear capable of adjustable meshed engagement between a first driving gear and a second driven gear, and a body rotatably supporting the intermediate gear and capable of movement in a direction that reduces the center distance between the intermediate gear and either the first gear, the second gear, or both. The movement of the body utilizes both a resilient urging and a hysteretic damping to supply appropriately light resilient biasing while being fortified against rapid retraction or repulsion.

In an internal combustion engine having a pair of balancer shafts (53, 54), an engine torque is transmitted from a crank gear (28) to an oil pump gear (74) on a drive shaft (73) of an oil pump (71) via a first idler gear (84) and the first balancer shaft gear (64). The engine torque is also transmitted to a fuel pump (72) from the crank gear to a fuel pump gear (78) via the first idler gear and a second idler gear (86), and to the second balancer shaft gear (67) via the first idler gear and second idler gear. Alternatively, the engine torque may be transmitted to the fuel pump from the crank gear to the fuel pump gear via the first idler gear, second balancer shaft gear and second idler gear. As the oil pump gear is actuated by the crank gear via the first idler gear, the oil pump gear is not subjected to the loading caused by the balancer shaft, and hence can be made of a compact and light-weight gear. Furthermore, this allows the various gears to be arranged in an efficient (in terms of the overall weight for the given mechanical strength requirements) and compact manner.

A method for measuring torque of static balance gravity on blade sets balance shaft on hinge base and connects balance shaft to blade to separately measure out distance from blade gravity to center line of propeller and distance from blade gravity to center line of flange.

The invention relates to a double-needle-bar warp knitting machine. The double-needle-bar warp knitting machine comprises a looping device, ground combing devices and a transmission device, wherein the looping device comprises front and rear needle bar parts and front and rear sinker bar parts; each ground combing device comprises an upper balance shaft, a yarn combing cradle and ground comb fixing bases in bilateral symmetry. The transmission device comprises front and rear needle bar transmission mechanisms, front and rear sinker bar transmission mechanisms, front and rear knocking-over transmission mechanisms and guide-bar cradle and upper balance shaft transmission mechanisms, wherein the front and rear needle bar transmission mechanisms supply power for the front and rear needle bar parts respectively, the front and rear sinker bar transmission mechanisms supply power for the front and rear sinker bar parts respectively, the front and rear knocking-over transmission mechanisms supply power for the front and rear balance shafts respectively, and the guide-bar cradle and upper balance shaft transmission mechanisms supply power for the yarn comb cradle respectively and control oscillation of the yarn comb cradle. The double-needle-bar warp knitting machine is capable of meeting the knitting requirements of short flock, medium flock and shag type warp knitting machines and can knit dense and jacquard pile fabric.

An efficient high-pressure horizontal multi-stage centrifugal pump belongs to centrefugal pump technology field concluding indraft section, middle sect, guild blade, impeller, pump axle, water lubricate bearing, outlet sect, axial force balancing mechanism and seal etc. Its character is that indraft of the pump layouted radial is different from all preceding editions, so that it greatly improves the efficiency of the impeller and the hydraulic pump cavitation performance. The pump adopts water lubrecate bearing installed in wterpower components interor; the lubrecate bearing closed to the outlet be considered a balance hub cmbines with balacing tray to a auto balacing mechanism. The pump needed a seal is compact and have one axle body because of adopting water lubrecate bearing. Its advantage is: less friction, high efficiency, reliability, and vulnerability of small,ease of rapid entry. The present invention applies to all occasions conveyor cleaning liquid.

The invention discloses a hanging elastic element for a heavy all-wheel drive off-road vehicle and a design method of the element. The hanging elastic element comprises a variable-stiffness few-leaf-spring assembly, an intermediate axle assembly, a rear axle assembly and a balance shaft seat, the variable-stiffness few-leaf-spring assembly comprises primary spring group springs and secondary spring group springs, a frame is fixedly connected at the upper end of the secondary spring group spring, the upper ends of the intermediate axle assembly and the rear axle assembly are respectively connected with the upper end of the balance shaft seat through the primary spring group springs, and the lower ends of the intermediate axle assembly and the rear axle assembly are respectively connected with the lower end of the balance shaft seat through lower thrusting rods. The hanging elastic element has suitable hanging partial frequency under the independent action of the primary springs and under the combined action of the primary spring group springs and the secondary spring group springs, tests of smoothness, comfort and reliability of a real vehicle are verified, a type test is verified, and the hanging elastic element has good smoothness, comfort and reliability under various working conditions and solves the problems of poor smoothness and comfort of a linear single-stiffness leaf spring of a heavy 6X6 off-road vehicle.

The invention relates to a rear balanced suspension system of a heavy-duty car, and provides the rear balanced suspension system of the heavy-duty car, which has the advantages that the carrying capacity is improved remarkably, the structures of all parts are more reasonable; and the connection is more stable, so that all the parts are not easily fatigued and broken. The rear balanced suspension system comprises a cast cross beam assembly and a balancing shaft assembly, wherein the cast cross beam assembly comprises an integral cast cross beam, upper connecting plates and lower connection plates; the integral cast cross beam comprises a top plate, a baseplate, side plates connected with the end parts of the top plate and the baseplate and perpendicular to the top plate and the baseplate, and a vertical plate connected with the middles of the top plate, the baseplate and the two side plates to cause the longitudinal section and the horizontal section of the cross beam to be I-shaped; and two X-shaped strengthening ribs are arranged among the front surface and the rear surface of the vertical plate, and the top plate and the baseplate. Connecting flange faces of balancing shaft brackets are connected with a connecting flange face of an auxiliary balancing shaft; and the bottoms of the two balancing shaft brackets are connected together through the auxiliary balancing shaft.

It is known that power is normally extracted within a gas turbine engine from a shaft in order to drive auxiliary devices such as electrical power generators. With high extraction rates from such shafts there is mismatching in rotational speeds between the shafts which must be adjusted through leakage taken from valves 8, 9. By measuring parameters and in particular pressure at a number of positions or parts within an engine arrangement 1 and comparing those parameters either through ratios or directly with reference values a controller can be configured in order to choose the correct sequence and scheduling of the valves 8, 9 opening to balance shaft speed. In such circumstances more efficient operation of the engine arrangement can be achieved over a wider range of engine speeds including idling.

A pressure balanced shaft seal assembly that allows a seal to dynamically respond to angular or radial misalignment of a shaft is disclosed. The pressure balanced shaft seal assembly includes a fixed stator, a floating stator, and a labyrinth seal. In one embodiment, the floating stator and labyrinth seal are mounted within an annular groove formed in the fixed stator such that the floating stator and labyrinth seal may move a predetermined amount in the radial direction with respect to the fixed stator. A spherical interface between the labyrinth seal and floating stator may allow the labyrinth seal to pivot with respect to the floating stator during angular misalignment of a shaft around which the pressure balanced shaft seal assembly is mounted. A pressure balancing annular channel formed in the floating stator allows pressurized seal fluid to balance the axial pressure exerted on the floating stator by the process fluid.

This invention discloses one motor curve axis balance structure, which comprises the following parts: balance axis matched weight distributed along 180 degree direction, drive axis, one pair of meshed balance gear, and balance axis cover with front end fixed with one balance axis gear and other end with one balance gear. The invention is characterized by fixing balance axis by side of cylinder and positive band drive axis to drive balance axis through balance axis gear.

A snowmobile including a frame assembly and a drive assembly coupled to the frame assembly. The drive assembly including a drive belt adapted to contact a ground surface to propel the snowmobile over the ground surface. An engine is supported by the frame assembly and includes an engine body. The engine body includes a crankcase, a crankshaft rotatably journaled within the crankcase for rotation about a crankshaft axis, and a cylinder block assembly extending in an upward direction from the crankcase. The cylinder block assembly defines at least one cylinder bore adapted to support a piston for a reciprocal motion along a bore axis. A balancer shaft is rotatably coupled to the crankshaft and supported by the engine body for rotation about a balancer shaft axis. The cylinder assembly is canted such that the bore axis is inclined to rearwardly from a vertical axis and the balancer shaft axis is disposed above the crankshaft axis. At least a portion of the balancer shaft can be disposed directly above the crankshaft.

A balance shaft for an engine comprises an elongate member defining a longitudinal axis and having first and second ends. A first counterweight is adjacent the first end and a second counterweight is adjacent the second end and positioned on opposite sides of the longitudinal axis. Each of the counterweights includes a pair of weight portions that are mirror images of each other across the longitudinal axis. Each weight portion includes a first generally planar surface extending in the longitudinal direction, a second generally planar surface inclined with respect to the first surface, and a third generally planar surface inclined with respect to the first and second surfaces. The inclined relation between the three surfaces controls the location of the gravitational center of each counterweight so that when the balance shaft rotates about the longitudinal axis, a couple moment is provided that counteracts the unbalance moment generated by the engine.

Said invention refers to multistage centrifugal pump with impeller self balancing axial force. Said invention adopts end surface sealed structure on impeller entrance, the impeller band being greater than impeller hub area, the fit between impeller band outside diameter with diversion shell being clearance fit, impeller entrance end surface sealing sub being thrust bearing sub etc method to realize completely balancing axial thrust effect depending on impeller itself, thoroughly solving multistage centrifugal pump axial force destruction problem, and reducing multistage centrifugal pump production costs.