阅读说明：本技术 柴油机气阀旋转装置 (Diesel engine air valve rotating device ) 是由 赵俊 高益多 方强 戴群 于 2020-07-13 设计创作，主要内容包括：本发明公开了一种柴油机气阀旋转装置,包括壳体、转体、弹簧、轴承、数个自制螺栓和数个钢球；转体、弹簧和轴承自上而下设置在壳体内孔中,轴承固定支撑在壳体内孔底部台阶上,弹簧设置在轴承上侧,转体底部支撑在弹簧上侧；转体中部设有倒锥孔,转体外圆上设有一周波浪形球槽,数个自制螺栓对称旋合在壳体径向两侧上,自制螺栓顶部设有球槽,数个钢球一侧分别支撑在对应球槽内,数个钢球另一侧分别顶在对应波浪形球槽的波底上。本发明可使气阀盘和阀座之间、气阀杆和导管之间均匀磨损,互相研磨,从而消除它们之间的积碳,防止漏气、卡死等现象的发生,同时还可使气阀盘均匀受热散热,避免气阀盘扭曲翘屈,延长其使用寿命。(The invention discloses a diesel engine air valve rotating device which comprises a shell, a rotating body, a spring, a bearing, a plurality of self-made bolts and a plurality of steel balls, wherein the rotating body is arranged on the shell; the rotating body, the spring and the bearing are arranged in an inner hole of the shell from top to bottom, the bearing is fixedly supported on a step at the bottom of the inner hole of the shell, the spring is arranged on the upper side of the bearing, and the bottom of the rotating body is supported on the upper side of the spring; the middle part of the rotating body is provided with an inverted taper hole, the outer circle of the rotating body is provided with a circle of wave-shaped ball grooves, a plurality of self-made bolts are symmetrically screwed on two radial sides of the shell, the top of each self-made bolt is provided with a ball groove, one side of each steel ball is supported in the corresponding ball groove, and the other side of each steel ball is supported on the wave bottom of the corresponding wave-shaped ball groove. The invention can lead the air valve disc and the valve seat, the air valve rod and the guide pipe to be evenly worn and mutually ground, thereby eliminating carbon deposition between the air valve disc and the valve seat, preventing the phenomena of air leakage, clamping and the like, simultaneously leading the air valve disc to be evenly heated and radiated, avoiding the air valve disc from being twisted, warped and bent, and prolonging the service life of the air valve disc.)

1. A diesel engine air valve rotary device is characterized in that: the self-made bolt comprises a shell, a rotating body, a spring, a bearing, a plurality of self-made bolts and a plurality of steel balls; the rotating body, the spring and the bearing are arranged in an inner hole of the shell from top to bottom, the bearing is fixedly supported on a step at the bottom of the inner hole of the shell, the spring is arranged on the upper side of the bearing, and the bottom of the rotating body is supported on the upper side of the spring; the middle part of the body is provided with an inverted taper hole, the outer circle of the body is provided with a circle of wave-shaped ball grooves, the plurality of self-made bolts are symmetrically screwed on the two radial sides of the shell, the top of each self-made bolt is provided with a ball groove, one side of each steel ball is supported in the corresponding ball groove, and the other side of each steel ball abuts against the wave bottom of the corresponding wave-shaped ball groove.

2. A diesel valve rotating apparatus as set forth in claim 1, wherein: a spring seat is arranged at the bottom of the rotating body, and the upper end of the spring is supported in the spring seat; the distance L between the bottom of the rotating body and the limiting shaft shoulder of the inner hole of the shell is smaller than or equal to the lift of the air valve camshaft.

3. A diesel valve rotating apparatus as set forth in claim 1, wherein: the depths h of the wave-shaped ball grooves and the ball grooves are 0.25-0.33 times of the diameter d of the steel ball; the distance L1 between the wave crest horizontal center line and the wave bottom horizontal center line of the wave-shaped ball groove is equal to the stroke of the rotator; the crest distance a and the bottom distance b of two groove edges of the wave-shaped ball groove are both 0.2-0.22 times of the diameter d of the steel ball.

4. A diesel valve rotating apparatus as set forth in claim 1, wherein: and air valve spring seats are symmetrically arranged at the bottom of the shell.

5. A diesel valve rotating apparatus as set forth in claim 1, wherein: the outer end of the self-made bolt is an optical axis, and the inner end of the self-made bolt is provided with a thread.

6. A diesel valve rotating apparatus as set forth in claim 1, wherein: the bearing is a thrust ball bearing.

Technical Field

The invention relates to a rotating device, in particular to a rotating device for an air inlet valve and an air outlet valve of a high-power medium-low speed diesel engine, belonging to the technical field of internal combustion engine parts.

Background

The internal combustion engine is the most widely used power machine in the world, wherein the diesel engine with high power, medium and low rotating speed can be widely applied to important industrial fields such as mining machinery, ships, nuclear power plants and the like due to the characteristics that the diesel engine with high power, medium and low rotating speed and the like can use light and heavy diesel oil and the like. However, due to long-term use of light diesel oil, carbon deposition is easily formed on the surfaces of the gas valve disc and the valve seat, so that the gas valve disc and the valve seat are not tightly attached, the gas valve disc is unevenly heated and is easy to distort and warp, the gas valve disc frequently leaks gas in the operation process, and the like, so that the power of the diesel oil is reduced, and meanwhile, the carbon deposition is also formed between the valve rod and the guide pipe, the phenomena of valve rod blocking, guide pipe eccentric wear and the like are caused, and the service life of an engine is influenced.

Disclosure of Invention

The invention aims to provide a diesel engine air valve rotating device which is simple in structure, can eliminate carbon deposition on the surfaces of an air valve disc and a valve seat and between a valve rod and a guide pipe and improve the heating condition of the air valve disc.

The invention is realized by the following technical scheme:

a diesel engine air valve rotating device comprises a shell, a rotating body, a spring, a bearing, a plurality of self-made bolts and a plurality of steel balls; the rotating body, the spring and the bearing are arranged in an inner hole of the shell from top to bottom, the bearing is fixedly supported on a step at the bottom of the inner hole of the shell, the spring is arranged on the upper side of the bearing, and the bottom of the rotating body is supported on the upper side of the spring; the middle part of the body is provided with an inverted taper hole, the outer circle of the body is provided with a circle of wave-shaped ball grooves, the plurality of self-made bolts are symmetrically screwed on the two radial sides of the shell, the top of each self-made bolt is provided with a ball groove, one side of each steel ball is supported in the corresponding ball groove, and the other side of each steel ball abuts against the wave bottom of the corresponding wave-shaped ball groove.

The object of the invention is further achieved by the following technical measures.

In the diesel engine air valve rotating device, the bottom of the rotating body is provided with the spring seat, and the upper end of the spring is supported in the spring seat; the distance L between the bottom of the rotating body and the limiting shaft shoulder of the inner hole of the shell is smaller than or equal to the lift of the air valve camshaft.

In the diesel engine air valve rotating device, the depths h of the wavy ball grooves and the ball grooves are 0.25-0.33 times of the diameter d of the steel ball; the distance L1 between the wave crest horizontal center line and the wave bottom horizontal center line of the wave-shaped ball groove is equal to the stroke of the rotator; the crest distance a and the bottom distance b of two groove edges of the wave-shaped ball groove are both 0.2-0.22 times of the diameter d of the steel ball.

In the diesel engine air valve rotating device, the air valve spring seats are symmetrically arranged at the bottom of the shell.

In the diesel engine air valve rotating device, the outer end of the self-made bolt is an optical axis, and the inner end of the self-made bolt is provided with threads.

In the diesel engine valve rotating device, the bearing is a thrust ball bearing.

In the process of opening and closing the air valve, the rotation of the rotating body drives the air valve rod to rotate around the axis of the air valve rod at a constant speed, so that the air valve rod and the valve seat are uniformly abraded and mutually ground, carbon deposition between the air valve rod and the guide pipe is eliminated, the phenomena of air leakage, blocking and the like are prevented, the power of a diesel engine is ensured, the air valve plate can be uniformly heated and cooled, the air valve plate is prevented from being twisted and warped, and the service life of the air valve plate is prolonged. The outer circle of the rotating body is provided with a circle of wave-shaped ball groove, the rotating body can be guaranteed to rotate smoothly under the action of two steel balls, the rotating body is guaranteed to rotate stably and reliably, when the inverted cone-shaped clamp on the air valve rod is wedged with the inverted cone hole in the rotating body, the force transmission between the rotating body and the air valve rod can be guaranteed to be sufficient and stable by utilizing the mutual extrusion effect of the conical surfaces, and therefore the whole device is guaranteed to operate safely and reliably.

Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the wave-shaped groove of the present invention after being unfolded;

fig. 3 is a schematic view of the structure of the present invention mounted on a diesel engine valve.

Detailed Description

The invention is further illustrated by the following figures and examples.

As shown in fig. 1 and 2, the present invention includes a housing 1, a rotator 2, a spring 3, a thrust ball bearing 4, two self-made bolts 5, and two steel balls 6. The bottom symmetry of casing 1 is equipped with air valve spring seat 11, and it sets up in the hole of casing 1 to turn 2, spring 3 and thrust ball bearing 4 top-down, and thrust ball bearing 4 fixed support is on the hole bottom step of casing 1, and spring 3 sets up on thrust ball bearing 4 upside, and 2 bottom sprayings of turning are on spring 3 upside. The bottom of the rotating body 2 is provided with a spring seat 21, the upper end of the spring 3 is supported in the spring seat 21, and the distance L between the bottom of the rotating body 2 and a limiting shaft shoulder 12 of an inner hole of the shell 1 is smaller than or equal to the lift of an air valve camshaft. The middle part of turning 2 is equipped with back taper hole 22, and the tapering of back taper hole 22 matches with the tapering of the back taper checkpost 20 on the air valve pole 10, is equipped with a week wave ball groove 23 on turning 2 excircle, and two self-control bolts 5 symmetries close soon on the radial both sides of casing 1, and self-control bolt 5 outer end is the optical axis, and the inner is equipped with the screw thread, and its top is equipped with ball groove 51, and two steel balls 6 one side are supported respectively in corresponding ball groove 51, and two steel balls 6 opposite sides push up respectively on the wave end that corresponds wave ball groove 23.

The depths h of the wave-shaped ball groove 23 and the ball groove 51 are 0.25-0.33 times of the diameter d of the steel ball 6, h in the embodiment is 0.32 times of d, the distance L1 between the wave crest horizontal center line and the wave bottom horizontal center line of the wave-shaped ball groove 23 is equal to the stroke of the rotating body 2, the wave crest distance a and the wave bottom distance b of two groove edges of the wave-shaped ball groove 23 are 0.2-0.22 times of the diameter d of the steel ball, a and b in the embodiment are 0.21 times of d, and the wave crest distance a and the wave bottom distance b are set so that when the wave crest or the wave bottom reaches the steel ball 6, the steel ball 6 can smoothly pass through the wave crest or the wave bottom to avoid blocking.

The shell 1 is made of No. 45 steel, a quenching and tempering heat treatment process is adopted, and the distance L from the inner limiting shaft shoulder 12 to the bottom of the rotating body 2 is 0-1 mm longer than the stroke L1 of the rotating body 2. The swivel 2 and the self-made bolt 5 are both processed by 12CrNi 2-grade alloy steel, a heat treatment process of carburizing, quenching and tempering is adopted, the hardness of the wavy ball groove surface and the hardness of the ball groove surface after heat treatment are HRC60 +/-2, and the surface roughness after polishing is Ra0.3-0.4 um. The spring 3 is made of 65CrSiA spring steel, the assembling force after assembling is equal to the assembling force (air valve opening pressure) of the air valve spring, and the downward force of the spring is smaller than the downward force of the air valve spring. The steel ball 6 is made of GCr15 bearing steel, the spherical hardness is HRC54 +/-4, and the surface roughness after polishing is Ra0.3-0.4 um.

As shown in figure 3, the invention is supported between a cylinder cover 8 and a valve bridge group 9 by using a valve spring 7, the upper end of a valve rod 10 penetrates through a shell 1, is connected with a thrust ball bearing 4 in the shell 1 and is connected with a conical surface of a reverse taper hole 22 of a rotating body 2 through a reverse taper clip 20. A gap is reserved between the top of the air valve rod 10 and the ball seat 30, the air valve disc 101 is tightly attached to the valve seat 40 by the elastic force of the air valve spring 7, the spring 3 effectively supports the rotating body 2 because the tightening force of the spring 3 is equal to the tightening force of the air valve spring 7, at the moment, the two steel balls 6 are respectively positioned at the wave bottom of the wave-shaped ball groove 23, and the air valve disc 101 is in a closed state.

The tappet does up-and-down linear motion along with the rotation of the air valve cam, when the tappet moves upwards, the rocker arm group drives the valve bridge group 9 to move downwards, the ball head seat 30 is attached to the top of the air valve rod 10, the ball head seat 30 pushes the air valve rod 10 to move downwards, the air valve rod 10 drives the rotating body 2 to move downwards, the downward compression elastic force of the spring 3 is smaller than the compression elastic force of the air valve spring 7, at the moment, the spring 3 is compressed, the positions of the two steel balls 6 are unchanged, and under the resistance action of the steel balls 6, the wavy ball grooves 23 on the rotating body 2 move relatively along the two steel balls, so that the rotating body 2 rotates clockwise around the axis while moving downwards, and the air valve rod 10 rotates clockwise along with the two. When the rotating body 2 moves downwards to the position of the limiting shaft shoulder 12, the rotating body 2 and the air valve rod 10 stop rotating, the whole device overcomes the elastic force of the air valve spring 7 to move downwards until the tappet is positioned at the highest point (lift) of the surface of the camshaft, at the moment, two wave tops of the wavy ball grooves 23 respectively reach the two steel balls 6, and the air valve disc 101 is completely opened.

Similarly, when the tappet moves downwards along the highest point of the camshaft, the rocker arm group drives the valve bridge group 9 to move upwards, the valve rod is driven to move upwards by the valve spring 7 under the action of restoring force, when the elastic force of the spring 3 is greater than or equal to that of the valve spring 7, the rotating body 2 continues to rotate clockwise while moving upwards, the valve rod 10 continues to rotate clockwise along with the rotating body until the tappet is positioned at the lowest point of the surface of the camshaft, at the moment, two wave bottoms of the wave-shaped ball grooves 23 respectively reach two steel balls 6, and the valve disc 101 is completely closed. By the end of this one cycle, the air valve stem 10 has rotated 1/2 cycles clockwise.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.