CN105697651A

CN105697651A - Centrifugal balance device of single-cylinder low-speed diesel engine

Info

Publication number: CN105697651A
Application number: CN201410696947.0A
Authority: CN
Inventors: 李晓波; 王贵新; 王传娟; 周晓燕; 吴贞明; 丁宇; 邢东宇
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2016-06-22

Abstract

The invention provides a centrifugal balance device of a single-cylinder low-speed diesel engine. The centrifugal balance device comprises a crankshaft, a crank arm, gears mounted on the crankshaft in a sleeving manner as well as a flywheel fixedly connected with one end of the crankshaft. The centrifugal balance device is characterized in that a flywheel-end balance weight is fixedly connected onto the rim of the flywheel, a free-end flywheel is fixedly connected to the other end of the crankshaft, and a free-end balance weight is fixedly connected onto the rim of the free-end flywheel. The centrifugal balance device of the single-cylinder low-speed diesel engine is simple in structure, the single-cylinder diesel engine is enabled to be compact in structure and small in size through the designed structure integrating the balance weights and the flywheels, and the balance problem is solved.

Description

Single cylinder low-speed diesel engine centrifugal balance device

Technical field

The present invention relates to a kind of centrifugal balance device, particularly relate to a kind of single cylinder low-speed diesel engine centrifugal balance device。

Background technology

Diesel engine balance refers to that it is when steady working condition operates, if passing to the size and Orientation of the active force of support all not times to time change, just claiming diesel engine is balance。But the periodicity of the reciprocating internal combustion engine periodicity due to work process and train motion, in operating, produced rotating inertia force and reciprocal inertia force are all periodically variable。If these power can not cancel each other in machine, the power passing to support also can be continually changing。Furthermore, owing to exporting the fluctuation of moment of torsion, will also result in the change of support reaction, these are exactly the unbalanced reason of reciprocating internal combustion engine。Periodicity active force and moment that its support is produced by unbalanced diesel engine will pass to basis or power set, and cause vibration。So, the parts depreciation increase of diesel engine, service life reduction are not only made；Noise raises, and worsens working condition, so that affecting matched power set and the normal operation about instrument；But also it may happen that covibration, cause even more serious destructive accident。Meanwhile, this vibration is also consumed by certain energy, reduces the economic performance of diesel engine。

The bascule of Chinese patent (publication number CN1037762A) a kind of multi-cylinder diesel engine proposes a kind of bascule suitable in twin-tub and the four reciprocal couples of cylinder stroke diesel engine, mainly add suitable eccentric mass at crankshaft two end, bent axle is made to form one group of additional force couple, one trunnion shaft parallel with camshaft is set again, it is ensured that balance；A kind of vertical single cylinder diesel balancing device of Chinese patent (notification number CN201884555U), original main bascule basis has additional a secondary bascule, although the equilibrium problem of diesel engine can be solved, but structure relative complex, volume is also relatively large。

Summary of the invention

The invention aims to the single cylinder low-speed diesel engine centrifugal balance device providing a kind of simple in construction, volume little。

The object of the present invention is achieved like this: the gear that include bent axle, crank arm, is sleeved on bent axle and fix the flywheel being connected with bent axle one end, be connected flywheel end balance weight on the wheel rim of described flywheel, the connected free end flywheel of the other end at bent axle, and the free end balance weight that is connected on the wheel rim of free end flywheel。

Present invention additionally comprises so some architectural features:

1. the central point intersected to crank arm with bent axle is zero, be X-axis positive direction, set up coordinate system for Z axis positive direction with the line of symmetry cranked arm for Z axis and along the direction cranked arm with the axis of bent axle for X-axis and along free end free wheel direction, described flywheel end balance weight and free end balance weight are arranged on the reciprocal relevant position of Z axis, and flywheel end balance weight is parallel with the line of symmetry cranked arm with the line of symmetry of free end balance weight。

Compared with prior art, the invention has the beneficial effects as follows: the present invention is by adopting the centrifugal weights of special construction, achieve the balance of low speed single cylinder diesel centrifugal intertia force, with this Structure Designing Problem solving low speed single cylinder diesel centrifugal weights and space Layout Problem；Realize sharing with flywheel end and free end drive system by the drive system of centrifugal balance device simultaneously, simplify the drive mechanism of balance system, improve transmission efficiency, and reduce the quality of complete machine；And present invention employs two ends formula arrangement, flywheel is designed to balance weight integrated structure, decrease the quantity of parts and components of diesel engine, reduce the complete machine height of diesel engine, also improving the reliability and stability of Diesel Engine Complete Machine, apparatus of the present invention also utilize diesel engine free end and the existing drive system of flywheel end to achieve the power transmission of bascule；Diesel engine toggle and power drive mechanism are changed less, has fully demonstrated the criterion of diesel engine modern designs。

Accompanying drawing explanation

Fig. 1 is the structural representation of flywheel end of the present invention；

Fig. 2 is the structural representation of free end of the present invention。

Detailed description of the invention

Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail。

In conjunction with Fig. 1 and Fig. 2, single cylinder low-speed diesel engine centrifugal balance device provided by the invention includes bent axle 7, crank arm 6, the gear 3 that is sleeved on bent axle 7 and fix the flywheel 1 being connected with bent axle 7 one end, be connected flywheel end balance weight 2 on the wheel rim of described flywheel 1, the connected free end flywheel 4 of the other end at bent axle 7, and the free end balance weight 5 that is connected on the wheel rim of free end flywheel 4；With 6 central points intersected with bent axle 7 of cranking arm be zero, be X-axis positive direction with the axis of bent axle 7 for X-axis and along free end flywheel 4 direction, with crank arm 6 line of symmetry for Z axis and along crank arm 6 direction set up coordinate system for Z axis positive direction, described flywheel end balance weight 2 and free end balance weight 5 are arranged on the reciprocal relevant position of Z axis, and flywheel end balance weight 2 and the line of symmetry of free end balance weight 5 with crank arm 6 line of symmetry parallel。

Specifically, it it is the connected free end flywheel 4 of free end of bent axle 7, its structure is the eccentric mass body adopting diameter to be Φ, at its wheel rim place, free end balance weight 5 is set, centrifugal intertia force produced by it is equal to the half of diesel engine centrifugal intertia force, in contrast, then bent axle 7 can drive free end flywheel 4 to rotate together in direction。In diesel engine running, flywheel end balance weight 2 and free end balance weight 5 and the same rotational speed of bent axle 7, therefore centrifugal intertia force size produced by two additional balance weights is equal to centrifugal intertia force produced by crank-pin, connecting rod tip and crank arm (namely diesel engine centrifugal intertia force), and direction is opposite to that。

Balance mass is generally added in crank position by prior art, balance mass is added on bent axle 7 on the flywheel 1 in the outside of the gear 3 of suit by the present invention, flywheel end balance weight 2 is bolted on the wheel rim being fixed on flywheel 1, and devising free end flywheel 4 at bent axle 7 at free end, free end balance weight 5 is bolted on the wheel rim being fixed on free end flywheel 4。When bent axle 7 rotates, produced by the quality of flywheel end balance weight 1 or free end flywheel 4, centrifugal intertia force size is respectively equal to the half of diesel engine centrifugal intertia force, and direction is in contrast。Therefore centrifugal intertia force size total produced by two balance weights that the present invention increases is equal to diesel engine centrifugal intertia force, and direction is opposite to that。No matter how diesel engine speed changes centrifugal intertia force produced by this bascule is balanced each other with the centrifugal intertia force of diesel engine all the time, it is ensured that the stability in single cylinder low-speed diesel engine work process, reduces its vibration and noise。

What present invention achieves two balance weights and flywheel is integral structure, makes single cylinder diesel structure simpler and compact, and volume is little。

Claims

1. a single cylinder low-speed diesel engine centrifugal balance device, including bent axle, crank arm, the gear that is sleeved on bent axle and fix the flywheel being connected with bent axle one end, it is characterized in that: be connected flywheel end balance weight on the wheel rim of described flywheel, the connected free end flywheel of the other end at bent axle, and the free end balance weight that is connected on the wheel rim of free end flywheel。

2. a kind of single cylinder low-speed diesel engine centrifugal balance device according to claim 1, it is characterized in that: the central point intersected with bent axle to crank arm is zero, be X-axis positive direction, set up coordinate system for Z axis positive direction with the line of symmetry cranked arm for Z axis and along the direction cranked arm with the axis of bent axle for X-axis and along free end free wheel direction, described flywheel end balance weight and free end balance weight are arranged on the reciprocal relevant position of Z axis, and flywheel end balance weight is parallel with the line of symmetry cranked arm with the line of symmetry of free end balance weight。